Дисертації з теми "Réseaux électriques (énergie) – Niger"
Оформте джерело за APA, MLA, Chicago, Harvard та іншими стилями
Ознайомтеся з топ-50 дисертацій для дослідження на тему "Réseaux électriques (énergie) – Niger".
Біля кожної праці в переліку літератури доступна кнопка «Додати до бібліографії». Скористайтеся нею – і ми автоматично оформимо бібліографічне посилання на обрану працю в потрібному вам стилі цитування: APA, MLA, «Гарвард», «Чикаго», «Ванкувер» тощо.
Також ви можете завантажити повний текст наукової публікації у форматі «.pdf» та прочитати онлайн анотацію до роботи, якщо відповідні параметри наявні в метаданих.
Переглядайте дисертації для різних дисциплін та оформлюйте правильно вашу бібліографію.
Chaibou, Oumarou Ali. "Le développement de l'électricité au Niger. Aspects juridiques." Electronic Thesis or Diss., Université Côte d'Azur, 2024. http://www.theses.fr/2024COAZ0015.
Повний текст джерелаElectricity evokes the Greek legend of King Midas, who turned everything he touched into “gold”. Since its artificial creation, electricity has been turning the conditions of human existence to “gold”, by fostering progress through people's comfort or its promotion improving, and through productive activities boosting. From this point of view, it gives access to the effective enjoyment of fundamental rights, because of its impact on food, education, health, drinking water and sanitation, work, etc. This importance justifies the legal basis, especially constitutional, that the Republic of Niger has given to its development. To achieve the objectives of energy sovereignty and universal access to energy, a firm political will on the part of public authorities, and the support of technical and financial partners, are required. However, it requires just as much, if not more, expansion of electricity as a single form of energy. This need for expansion focuses thought on conditions and means; it tests the exercise of powers and rights. This African thesis for Africans is based on a living law approach, one that reintegrates law into its environment, blending numerous legal disciplines (and even non-legal disciplines such as economics and politics). The author argues that the legal framework for the expansion of electricity as a condition for economic and social development is rich, but nevertheless perfectible. He highlights two complementary aspects. Firstly, he observes that the State's sovereign responsibilities are preserved in determining energy options and controlling the electricity sub-sector. Secondly, he shows that the Republic of Niger has chosen to promote private initiative within the framework of public service and individual autonomy
Xie, Ruichao. "A novel Wide-Area control strategy for damping of critical frequency oscillations via modulation of active power injections." Doctoral thesis, Université Laval, 2021. http://hdl.handle.net/20.500.11794/67983.
Повний текст джерелаThis dissertation provides a novel wide-area control strategy for damping of critical frequency oscillations via modulation of fast active power injections, which paves the way for the utilization of large-scale geographically dispersed actuators, e.g., distributed energy resources (DERs), in the control of power system low-frequency rotor angle dynamics, this includes the inter-area oscillations and the transient frequency swing. The proposed method incorporates these two different dynamics into a linear time invariant (LTI) system based control framework, in which the control of the transient frequency swing is translated into the control of the system common mode dynamics. For this purpose, a careful examination of the relationship between the transient frequency swing and the common mode dynamics is carried out; extensive simulations show that the common mode defines the shape of a small-signal transient frequency swing. The proposed control method pursues an efficient utilization of the limited power reserve of existing DERs to mitigate these oscillations. This is accomplished by decoupling the damping control actions at different sites using the oscillation signals of the concerned mode as the power commands. A theoretical basis for this decoupled modulating control is provided. Technically, the desired sole modal oscillation signals are filtered out by linearly combining the system-wide frequencies, which is determined by the linear quadratic regulator based sparsity-promoting (LQRSP) technique. With the proposed strategy, the modulation of each active power injection can be effectively engineered considering the response limit and steady-state output capability of the supporting device. In the proposed control framework, the power command signal for the primary frequency control is determined in a (near) optimal control sense; experiments show that this signal tends to be the system speed seen by the power injection point. Importantly, the decoupled modulating control tends to isolate the control actions for the inter-area oscillations and the transient frequency swing, thereby greatly relieving the concern about the interaction between the control of these two types of dynamics.
Fang, Ruyi. "Optimisation de l'insertion des liaisons souterraines dans le réseau électrique." Grenoble INPG, 1995. https://hal.archives-ouvertes.fr/tel-01887891.
Повний текст джерелаBoëda, Didier. "Étude de la contribution du pilotage de charges à la fourniture de services aux réseaux électriques." Grenoble INPG, 2009. http://www.theses.fr/2009INPG0061.
Повний текст джерелаPower systems are nowadays facing new challenges with the electricity market deregulation, the introduction of distributed generation and the global consumption growth. Consequently, power grids will undergo more stresses and electrical loads will support the system. Thus, load control is considered to take part into networks management and services delivery. The research described in this thesis aims to introduce some load control capabilities in this aforementioned changing context. The contribution of residential thermal loads and household appliances into the management of incidents consequences are considered. Studies enable us to conclude that these kinds of loads have notable abilities for preventive and real time control. The results obtained and the innovation of this research subject, allow us to consider future studies such as, widening works including other type of loads to control and other services to deliver
Shafiee, Khoor Mohsen. "Amélioration de la qualité de l'énergie à l'aide de compensateurs actifs : série, parallèle ou conditionneurs unifiés de réseaux électriques." Nantes, 2006. http://www.theses.fr/2006NANT2109.
Повний текст джерелаDue to deregulation in the power sectors of transmission and distribution, Power Quality (PQ) has become a distinguishing feature of electricity, to be treated as a commodity in the open market economy. On the other hand, the proliferation of power electronic equipment has lead to a significant increase of power quality problems. One of the major issues in improving power quality in distribution networks is the mitigation of network voltage distortions for proper operation of industrial process where there are sensitive and critical loads. The first to treat the voltage perturbations such as voltage dips, harmonics, flickers and voltage imbalances, the “dynamic voltage restorers” (DVR), based on the series active power filtering (SAPF) topology, is studied, analysed and discussed in detail in this thesis. Parallel active power filtering (PAPF); as a powerful tool for current harmonics and fundamental reactive power compensation; and their ontrol strategies are also studied. Different aspects concerning PAPF and SAPF, such as voltage and current distortion extraction, voltage source power converters and control strategies and design considerations are dealt with detail. To complete the studies a power flow study is presented to determine the power rating in different parts of a unified power quality conditioner (UPQC) during the faults, which are carried out in a flicker phenomena as an interesting case study. A novel analogical method of perturbation detection is proposed for active filtering, and to stay analogue, the analogue PID controllers are proposed for different parts of a complete UPQC system. Extensive computer simulation using MATLAB/SIMULINK Power System Blockset and experimental results are used to show the viability and performance of the proposed DVR, PAPF and UPQC for different voltage and current perturbations rejection in different conditions both in steady state and transient times
He, Zhaofeng. "Recherche d'indicateurs de stabilité transitoire de réseaux électriques." Toulouse, INPT, 1989. http://www.theses.fr/1989INPT105H.
Повний текст джерелаPoulain, David. "Dimensionnement des réseaux métropolitains transparents à faible consommation d'énergie." Versailles-St Quentin en Yvelines, 2013. http://www.theses.fr/2013VERS0012.
Повний текст джерелаIn this thesis we address the problem of dimensionning metropolitan all-optical rings with low energy consumption. A new architecture for all-optical nodes, called Packet Optical Add-Drop Multiplexer (POADM), improves the performance of metropolitan networks while reducing their energy consumption and therefore their operating costs. A POADM is composed of advanced optical receivers whose unit cost is elevated. The number of these equipments is variable in each node and it determines the performance but also the capital expenditure of the network. We offer design solutions to both ensure network performance while minimizing the cost of deploying it
Ezzeddine, Mazhar. "Etude et coordination de protections dans les réseaux électriques." Paris 11, 2010. http://www.theses.fr/2010PA112143.
Повний текст джерелаOur thesis begins by an overview of the optimal coordination of overcurrent relays and distance relays. For an optimal coordination, the relays settings, being the time multiplier setting TMS, the pickup currents Ip and the operating time of the second zone of distance relay tz2, must be determined with the help of linear or nonlinear optimization methods. The objective of the overview is to identify the advantages and the drawbacks of the available methods. The principal disadvantages of the existing methods are no-optimal selection of pickup currents with linear optimization, then the complexity of nonlinear discrete optimization and finally the determination of no discrete settings of relays. Ln order to overcome these disadvantages, we have developed a new method for the optimal coordination of protective relays. The proposed method uses a linear formulation of the coordination problem in order to optimize the relay settings with values complying with setting ranges. The comparison with certain existing methods certifies the efficiency of the proposed method
Wang, De Kuan. "Contribution à l'étude probabilistique de la conduite des réseaux d'énergie électrique." Vandoeuvre-les-Nancy, INPL, 1987. http://www.theses.fr/1987NAN10324.
Повний текст джерелаLagonotte, Patrick. "Analyse structurale des réseaux électriques : application au réglage hiérarchisé de la tension du réseau français." Grenoble INPG, 1987. http://www.theses.fr/1987INPG0114.
Повний текст джерелаDelavari, Atieh. "Novel load-based control strategies for power system primary frequency regulation." Doctoral thesis, Université Laval, 2018. http://hdl.handle.net/20.500.11794/29902.
Повний текст джерелаAny inequality between power system generation and load must be corrected in a short time, otherwise frequency deviation will happen and consequently the stability and security of the power system will be threatened. Demand-side endpoints are distributed on the load side of power systems in contrast to traditional control resources such as centralized bulk generators. The ability of outright ON/OFF switching devices on the demand side enables the loads to respond faster to system disturbances, compared to most conventional generators. This feature, along with the integration of sensing, computation and communication technologies, makes demand-side resources an ideal candidate in primary frequency regulation. This thesis focuses on controlling power systems using distributed load-side resources. Specifically, it proposes three main solutions to overcome the limitations of decentralized load control approaches: *Improved Optimal Load Control (IOLC): We introduce an Improved Optimal Load Control (IOLC) approach by applying a systematic gain-tuning method to the conventional OLC. A joint Non-dominated Sorting Genetic Algorithm-II (NSGA-II) with Fuzzy Selection Algorithm (FSA) is employed as the multi objective gain-tuning procedure in IOLC approach. We show by simulation that in comparison with OLC, IOLC can achieve a better generalization performance in the case of turbine-governor (TG) control action whether enabled or disabled. *Sparse and Resilient Hierarchical Direct Load Control: We design and develop a hierarchical sensor pruning load modulation strategy for primary frequency response improvement and inter-area oscillations damping. The proposed coordinated hierarchical load control structure utilizes both local and distributed wide-area control, where controllers make use of remote measurements and control signals in an optimal sparse wide-area structure. To be precise, device layer deals with demand-response and frequency regulation, while the sparse supervisory layer improves the system’s closed-loop performance and stability margins, with simultaneous reduction of the cost of data transfer, communication links and power network complexity. *Virtual Inertia-based Load Control: Considering the storage built-in aggregated loads, we extend the conventional load control to enable virtual inertia in low-inertia rate power systems. The virtual inertia-based load control signal therefore minimizes the rate of change of frequency as well as frequency error to provide desired power balance over the network. We show by simulation that enabling load-based virtual inertia provides better power system frequency regulation with remarkably improved transient performance, frequency nadir and steady state error by shedding approximately equal or even less amount of controllable loads compared to the conventional load control. Furthermore, we develop two commonly used Simscape Power Systems (SPS) benchmarks for power system education and research worldwide. We also present a frequency measurement block (which will be included in Matlab 2018a measurement library) to measure the frequency in a SPS model running in phasor mode.
Zhang, He. "Gestion décentralisée de réseaux continus à forte disponibilité en aéronautique." Thesis, Lille 1, 2010. http://www.theses.fr/2010LIL10032/document.
Повний текст джерелаThe electrification trend is for all modes of transportation, particularly in the next generation of commercial aircrafts. This trend began with the Airbus A380 and Boeing 787 and it will continue. The replacement of mechanical, hydraulic and pneumatic power transfers by an electrical one is one of the most important innovations of the More Electric Aircraft in the aspect of ecologic and economic (weight reduction, energy efficiency increasing, maintenance costs reduction, etc..). The development of a local power exchange network, like a DC one, should facilitate this process. Some local electricity production, bi-directional loads and energy storage and dissipation system, are then interconnected by a DC bus, via some appropriate protections. Several power management strategies are proposed. Depending on the objectives, constraints and means of action envisaged, some tools have been implemented. In the case of a multiple objectives strategy, fuzzy logic appears to be a well suited tool . Moreover, being based on rules, this tool allows to develop naturally a power management strategy in considering several constraints. Two indicators to evaluate performance of these supervision strategies have been proposed (energy efficiency and voltage variation). These indicators help to choose a strategy of supervision, and provide criteria for sizing the storage and dissipation system. These supervision strategies were tested experimentally. The stability of the local DC network was analyzed in small signal. It is shown that the hybrid system with the associated energy management strategy can help to increase the stability margin of this type of network. The currently power connection being implemented in on-board systems is not reversible in power. To make it reversible necessitates a complete redesign of the protections. The problem of short-circuit protection and fault isolation has been investigated. A method to select the branch in insulation failure is proposed. It is tested using the Saber simulation tool that takes into account the characteristics of real components. The work in this thesis can be generalized and to be applied in other fields such as electric or hybrid vehicles, rail systems …etc
Alali, Mohamad Alaa Eddin. "Contribution à l'Etude des Compensateurs Actifs des Réseaux Electriques Basse Tension : (Automatisation des systèmes de puissance électriques)." Université Louis Pasteur (Strasbourg) (1971-2008), 2002. http://www.theses.fr/2002STR13026.
Повний текст джерелаIn an electrical network, unbalanced and harmonic currents generated by nonlinear and unbalanced loads can cause harmonics and unbalanced voltage. These voltage perturbations along with voltage sag can strongly degrade customer power quality. Nowadays, the active filtres such as shunt, series and combined shunt-series are studied as a flexible solution to compensate all current and voltage perturbations. Therefore, in order to improve power system quality, we have studied advanced control methods applied on the structures of the above mentioned active filtres. For such requirements, we have developed a new RST control method in order to extend the application spectrum of RST controller. Thus, an universal shunt active filter has been developed using a continuous and discret time experimental
Marin, Ceballos David Humberto. "Intégration des éoliennes dans les réseaux électriques insulaires." Thesis, Ecole centrale de Lille, 2009. http://www.theses.fr/2009ECLI0004/document.
Повний текст джерелаIslands are favourable places to the development of wind energy. Firstly, the production costs of the conventional generation are higher than on the interconnected grids. Secondly, there is an important wind potential in these regions. Finally, the wind energy makes possible to reduce the energy dependence of fossil products, to respect the Kyoto protocol and to ensure the future electricity supply of these regions with sustained growth.Currently, wind energy is fast-growing in the islands grids. This growth worries the grid operators because this production is very different from the conventional sources. Moreover, these grids could reach very quickly a high levels wind penetration because their low size. However, the insular grids are weak grids compare to the inter-connected grids. In this kind of grids, the massive insertion of wind turbines is accompanied by particular characteristics which might damage operation of the electric system. The present study was carried out in order to analyze the impact on increase wind energy penetration in the insular grids and to propose solutions allowing the development of this energy sources in these areas. In this respect, several strategies of control were proposed. Firstly, two control strategies of the reactive power exchanged by the wind farms with the grids were compared, in order to minimize the voltage increasing in the distribution grids with strong wind penetration. Secondly, two control strategies were implemented in order to regulate the grid frequency through wind turbines. The control strategies were implemented on Matlab-Simulink then validated on EUROSTAG. Initially, they were evaluated in a simplified network in order to study more precisely and in a systematic way the influence of the choice and parameter settings of control in the dynamic behaviour of a weak grid. Then, they were extended to the distribution grid of Mont-Dore in New Caledonia and to the Guadeloupe electric grid
Acquaviva, Valérie. "Analyse de l’intégration des systèmes énergétiques à sources renouvelables dans les réseaux électriques insulaires." Corte, 2009. https://tel.archives-ouvertes.fr/tel-00605573.
Повний текст джерелаThe aim of this PHD is to study the potential of the island grid connected PV systems. Our study foc uses on three kind of systems: integration pf Grid-connected PV plants; Rooftop PV systems to reduce volt drops at the end of the grid and a study on an experimental system. The first part shows the PV's contribution to the Corsican electric network. The simultaneity between the load and the power given by a PV plant is studied as weIl the Effective Load Capacity of the PV systems. The second part of this thesis deal with the residential area and more precisely the support of the electrical end of line via the PV solution. Lndeed, to this day many homes still have volt drops problems. To make sure that the user has maximum comfort, we have chosen this solution because the island has an important solar potential and also because users are more and more fond ofthis kind of energy. Finally, the third and final chapter shows the experimental part of the PHD. It talks about the modelisation of a small grid-connected system located on the university site of Vignola. Five years of monitoring data were studied. Analysing the performances and the grid / inverter interaction showed the production problems linked to the frequency and impendency variations. The necessary modifications to the inverter's parameters have led to very satisfactory results. This work offers an analysis of the integration of PV units to the island's electrical network and will have to be completed by a more thorough study of the grid / inverter interaction
Gholipour, Shahraki Eskandar. "Apport de l'UPFC à l'amélioration de la stabilité transitoire des réseaux électriques." Nancy 1, 2003. http://www.theses.fr/2003NAN10106.
Повний текст джерелаThe main prupose of this research is the modeling, the identification of the references and control of UPFC d'UPFC (Unified Power Flow Controller), in order to improve the transient stability of generator connected to an infinite bus. In order to analyse the influence of the UPFC on the network, the mathematical model of a UPFC connected to an infinite bus is presented. Various methods of identification of references ( instantaneous power, decoupled Watt-Var ) and various regulators ( P, PI, IP, RST ) for the shunt part and also series part of the UPFC are studied in the steady state operation. Different methods for identification of the series part like " optimal parameters ", " injection model ", and " state variables " in order to improve the stability of the system, are studied. Finally, a new method for identification based on " state variables " using the local parameters of the system is proposed and tested through the simulations
Alkhatib, Hasan. "Etude de la stabilité aux petites perturbations dans les grands réseaux électriques : optimisation de la régulation par une méthode métaheuristique." Aix-Marseille 3, 2008. http://www.theses.fr/2008AIX30068.
Повний текст джерелаOver the past twenty years, electric utilities are being operated their power systems at full power and often closer to their stability limits. The improvement of small signal stability, in particular the damping of inter-area oscillations, has become therefore a priority. Interactions between the generators of different regions and the used regulators require a global optimization of their performances: this is the best way to ensure the whole optimal behaviour. Our work objective is to ensure a maximum damping of the inter-area modes as well as of the local modes, using power system stabilizer (PSS) that is habitually used in the damping of electromechanical local modes. So, we have developed a global optimization method based on genetic algorithms and a multi-objective function using relative and absolute stability parameters that are obtained of the system eigenvalue analysis. We have analyzed the influence of the gradual increase of the variable number that to be optimized simultaneously (PSS parameters, their location and number). The proposed method allows an optimal setting of PSSs with the best possible location and a reduced number. We have also proposed a new optimization method using dynamic adaptive space research. This can improve the optimization performance and the convergence acceleration of this algorithm. The performance of these optimizations methods has been evaluated on the New England/ New York multi-machine network via system eigenvalue analysis, linear and nonlinear time domain simulations
Bouzit, Ali. "Stabilité et stabilisation des systèmes dynamiques : application au cas d'un réseau électrique." Perpignan, 1990. http://www.theses.fr/1990PERP0076.
Повний текст джерелаBelacheheb, Khalid. "Contribution à l'étude des systèmes de compensation FACTS en général, l'UPFC en particulier, pour le contrôle du transit de puissance dans un réseau de transport." Nancy 1, 2000. http://www.theses.fr/2000NAN10068.
Повний текст джерелаElectrical systems are strongly interconnected where the power transit is governed solely by Kirchhoffs laws on which the dispatchers have no means to act. It results in sorne unbalanced distribution of loads, provoking thus overloads of sorne electrical lines and a reduction of the stability margin of the electrical system. In order to solve these problems of the electrical power transit control, the consortium of American electricity companies (EPRI) has launched the FACTS project (Flexible Alternate CUITent Transmission System) in 1988. The FACTS concept regroups aIl systems using power electronic deviees applied on the electrical system. Among the FACTS systems, the UPFC deviee (Unified Power Flow Controller) is the most complete and the most effective. It is the union of a shunt compensator (CSPRA) and a series compensator (ISA), and has a functionality ofboth a CSPRA, an ISA and a phase-shifter. It is therefore able to control, simultaneously and independently, the active and reactive line power. It can control the three parameters associated to the power transit; the voltage, the impedance and the phase of the electrical line. The control of one of these parameters allows to vary the line active power. A model of this deviee is developed so as to determine the adequate controls of the shunt and series parts and in the same time, the one of the active power control. This work is devoted to the application of the FACTS systems, especiaIly to the UPFC in order to control the power transit in an electrical system whose parameters are given by EDF. The different numerical simulations, undertaken on MATLAB and SABER, have shown the contribution of these deviees to control the power transit and confirm aIl the hopes they had aroused in years 90
Coutard, Olivier. "Une analyse économique de l'accès aux réseaux électriques d'interconnexion." Phd thesis, Marne-la-vallée, ENPC, 1994. http://www.theses.fr/1994ENPC9440.
Повний текст джерелаBerbiche, Monsef. "Sur la stabilité transitoire des réseaux d'énergie électrique : approche par reconnaissance des formes statistique." Toulouse 3, 1990. http://www.theses.fr/1990TOU30064.
Повний текст джерелаLe-Huy, Philippe. "Contributions à la simulation temps réel des grands réseaux électriques modernes." Doctoral thesis, Université Laval, 2021. http://hdl.handle.net/20.500.11794/69365.
Повний текст джерелаElsied, Moataz. "Gestion de l’énergie dans un système multi-sources." Caen, 2015. http://www.theses.fr/2015CAEN2038.
Повний текст джерелаIn this thesis, an advanced energy management system (EMS) model for a typical Microgrid (MG) working in grid and islanded operating modes was introduced, discussed and analyzed. MG model under consideration included FC (Fuel cell), MT (Microturbine), WT (Wind), PV (Photovoltaic), and ESS (Energy storage system). The established EMS was formulated as a nonlinear optimization model with different equality and inequality constraints for proper solution based on the AIMMS (Advanced Integrated Multidimensional Modeling Software), GA (Genetic algorithm) and PSO (Particle swarm optimization algorithm). In addition, a comparative study of DC/DC boost converter topologies was investigated in order to select the best topology to be used for interfacing the DERs to the MG’s DC-bus. Moreover, a new auto-tuning online controller design for the proposed converters was designed based on MLIB/MTRACE (MATLAB-dSPACE Real-Time Interface Libraries). Furthermore, a novel method for controlling the PWM carriers of multiple DC/DC converters interfaced to MG’s DC-BUS was introduced. The main purpose of this method was to minimize the DC-BUS ripples based on optimizing the PWM carriers’ phase shift angle. Finally, an experimental testbed was built in our laboratory to test in a real-time the aforementioned EMS
Pakpahan, Parouli M. "Modélisation et simulation du comportement thermique des parafoudres à ZnO." Ecully, Ecole centrale de Lyon, 1991. http://www.theses.fr/1991ECDLA006.
Повний текст джерелаAli, Mahmoud. "Mitigation of electromechanical disturbance propagation in power systems." Rennes 1, 2010. http://www.theses.fr/2010REN1S115.
Повний текст джерелаThis thesis addresses the problems related to the phenomenon of electromechanical disturbance propagation in power systems. This phenomenon affects the protection systems, because it exposes remote relaying systems, such as over-current relays and distance relays, to false responses. Mitigating the propagation of the electromechanical disturbance is therefore crucial to alleviate its impacts on power systems. In this thesis, different control techniques are proposed to mitigate the electromechanical disturbance propagation. They rely whether on power system stabilizers or on fuzzy logic and an adaptive neuro-fuzzy control. The proposed strategies exploit the speed and direction of the propagation to add an extra damping at the disturbance arrival. The simulation results obtained from the applications of the proposed controllers to a uniform power system model and to a model of the Western North American power grid demonstrate the effectiveness of these controllers with respect to the conventional tuning of the power system stabilizers
Barbier, Gérald. "Alternateur à double excitation alimentée par des convertisseurs statiques : simulation et expérimentation." Besançon, 2000. http://www.theses.fr/2000BESA2073.
Повний текст джерелаThe quality of an electrical supply network imposes the maintenance of stability during disturbed operations. The consumption of the reactive power created by the lines, during hollow of load is a factor of instability, all the more important that the lines are longer. A generator provided with a second inductor winding shifted in space, makes it possible to absorb an important reactive power all while maintaining stability. Studies showed that this solution was viable, for networks of which the lengths of lines are consequent, like the network in Russia. Since the beginning of the Eighties, the Soviet ex-Union was interested in operation of this generator called double excitation. Prototypes were built in the power station of Burchtinskaya. A collaboration between Russia and France, made it possible to improve the mode of control. Work of this memory is associated with this collaboration. The author gives the description of the test bench at a reduced scale, of a group of production of electrical energy using a generator with double excitation connected through a line to a powerful network. IGBT converters of chopper type, reversible in current and voltage feed the field circuits. The test bench is instrumented and controls are managed in real time by means of Dspace associated with Matlab/Simulink. The theoretical and real diagrams of control are presented. Inputs and outputs must be filtered and the author makes also a practical comparison between two modes of piloting the converters. Parallel to this experimentation, a theoretical study by simulation on the Saber software is made, in order to study the behaviour of the system described previously and thus to simulate the total test bench including bridges with IGBT. This requires a setting in equation of the application and a transcription compatible with the Saber software. Simulation allows a validation of the running of the double excitation generator in consumption or supply of reactive power. It must be noticed the difficulty of identification of the parameters of the machine. The study has been carried out in per unit values to allow a generalisation. An experimental study traduces in the active and reactive powers plan, the evolution of the Critical Clearing Time (CCT) following a three-phased short circuit, in order to determine the performances of the generator and its control. The first conclusions show a very clear improvement of stability compared to a classical synchronous machine
Élisabelar, Christian. "Structures et techniques de contrôle des convertisseurs connectés à un réseau triphasé impédant." Toulouse, INPT, 1990. http://www.theses.fr/1990INPT013H.
Повний текст джерелаBenhabib, Mohamed Choukri. "Contribution à l'étude des différentes topologies et commandes des filtres actifs parallèles à structure tension : Modélisation, simulation et validation expérimentale de la commande." Nancy 1, 2004. http://www.theses.fr/2004NAN10177.
Повний текст джерелаThese last years, the use of power electronic loads is increased. These loads absorb non-sinusoidal current in the electrical network and behave such as harmonic currents generator, which can have undesirable effects on electrical equipments. The recent development of semi-conductor completly controlable, such as IGBT, allows to concieve news structures, such as active power filter for harmonic compensation. In this thesis, different topologies and control strategies of the parallel active power filters to compensate current harmonics and reactive power in three and four wire electrical network is studied. An analog control for these active power filters is developped theoretically, then confirmed by simulations and validated by a experimental bench. The modular structure of active power filter, for compensating three-wire and four-wire electrical network with high power non-linear loads is also studied in this work. A selection in the control of this modular active power filter has be introduced, optimize the inverters to be adopted as a function of loadd power
Rigaut, Tristan. "Time decomposition methods for optimal management of energy storage under stochasticity." Thesis, Paris Est, 2019. http://www.theses.fr/2019PESC2015/document.
Повний текст джерелаThe development of energy storage paves the way to innovative methods to manage energy at a local scale. Micro grids are a novel kind of electrical grids with local production (renewable and waste energy), local demand, local storage and an Energy Management System (EMS). A wide literature already studies EMS implementations in micro grids but the produced methods are not exhaustively framed and compared. One of the main difficulty in micro grids energy management is to handle the different dynamics of electrical devices. Current variations are lighting fast, solar power changes quickly, different kind of storage react at different paces and batteries ageing is a slow process. We studya mathematical framework and algorithms, based on multistage stochastic optimization theory and Dynamic Programming, to model and solve energy management problems in micro grids with time decomposition methods. In the first part of this thesis, Contributions to time decomposition in multistage stochastic optimization, we present a general framework to decompose temporally large scale stochastic optimization problems into smaller subproblems. We then classify multiple existing resolution methods inside this framework. In the second part, Stochastic optimization of energy storage for management of micro grids, we compare different methods presented in the first part on realistic applications. First we control a battery and a ventilation in a subway station recovering subways braking energy with four different algorithms. Then we present how these results could be implemented on a real micro grid. We implement a fast online control method to stabilize the voltage in a simulated islanded DC micro grid connecting solar panels, an electrical load and two sorts of energy storage: a battery and a supercapacitor. Finally we apply our time decomposition framework to a problem of long term aging and energy management of a storage in a micro grid. This last chapter introduces a framework to model time decomposition of micro grids hierarchical control architectures, as well as two algorithms to solve temporally large scale stochastic optimization problems.In the third part, Softwares and experimentations, we present DynOpt.jl, a Julia language package developed to produce all the results of this thesis and more. Then we study an application of this software to the control of a real test bed: the energy aware temperature regulation of a real house in the equipment named "Sense City"
Houidi, Sarra. "Classification des charges électriques résidentielles en vue de leur gestion intelligente et de leur comptabilisation." Thesis, Nantes, 2020. http://www.theses.fr/2020NANT4016.
Повний текст джерелаThe residential sector contributes nowadays to an important part of the total electricity consumption. To reduce electricity costs and to allow smart home applications, a partition of the load curve into its main components is necessary. This can be achieved with a minimum privacy invasion by applying Non-Intrusive Load Monitoring (NILM) approaches which intend to estimate the energy consumed by individual Home Electrical Appliances (HEAs) with a single meter placed in a house electrical panel. In this thesis, we present the steps to implement an event-based NILM process. We start from the current and voltage measurements using our own developed low cost device. Then, the detection of the switching on/off of the HEAs is achieved using appropriately selected power time series instead of the active power time series only. The performances of several detection algorithms were assessed and a Feature Selection Algorithm for Detection Purposes (FSADP) was designed. Finally, the HEAs identification is performed using a classifier and a database including HEAs unique signatures of electrical selected power features derived from current and voltage measurements in steady-state conditions. Several classifiers and feature selection methods are combined in order to obtain the optimal NILM application leading to the best classification results. Last but not least, to provide a purpose to NILM process, we propose a HEAs management strategy to reduce the daily electricity cost while taking into account users comfort and HEAs degrees of controllability
Passelergue, Jean-Christophe. "Interactions des dispositifs FACTS dans les grands réseaux électriques." Phd thesis, Grenoble INPG, 1998. http://tel.archives-ouvertes.fr/tel-00823351.
Повний текст джерелаCoutard, Olivier. "UNE ANALYSE ÉCONOMIQUE DE L'ACCÈS AUX RÉSEAUX ÉLECTRIQUES D'INTERCONNEXION." Phd thesis, Ecole Nationale des Ponts et Chaussées, 1994. http://tel.archives-ouvertes.fr/tel-00345062.
Повний текст джерелаrécentes dans le secteur électrique, leurs modalités et leurs enjeux. La seconde traite des questions d'efficacité tarifaire des prix d'accès. La troisième enfin aborde la question de la réglementation et, plus généralement, de la régulation d'un système électrique ouvert.
Le premier chapitre vise à décortiquer in concreto les relations de dépendance mutuelle, d'interpénétration entre les considérations économiques et les considérations extra économiques (i.e. réglementaires au sens large ou même politiques) dans l'organisation industrielle traditionnelle (on peut parler de modèle) du secteur électrique dans les sociétés développées.
Nous analysons le rôle essentiel du couple interconnexion/ intégration dans cette organisation.
C'est cet équilibre complexe qui est globalement remis en cause par les évolutions réglementaires récentes, auxquelles est consacré le deuxième
chapitre. La perspective adoptée dans l'analyse nous permet d'expliciter les principaux enjeux de ces évolutions : promotion de l'efficacité économique
(au sens large) ; préservation des conditions d'exercice de différentes missions 'de service public' (ou 'd'intérêt économique général'). Nous tentons de
préciser le plus finement possible les termes économiques dans lesquels ces enjeux se présentent aux réglementeurs du secteur électrique.
Le troisième chapitre débute l'étude plus normative du problème des prix d'accès. La notion de coût marginal de court terme de transport, qui
soulève ici des problèmes conceptuels inusités, y est présentée et discutée. Nous étudions en particulier les limitations à l'efficacité de ces coûts
marginaux qui résultent de la présence d'externalités, de problèmes informationnels et de l'existence de coûts de transaction.
Nous poursuivons cette démarche dans le quatrième chapitre, en étudiant d'une part les conséquences pratiques en termes d'efficacité des indivisibilités dans les fonctions de coût de réseau, et d'autre part celles de la variabilité-imprévisibilité des coûts marginaux de court terme de transport.
Nous proposons différents critères et principes pour limiter en pratique les inefficacités induites.
Dans le cinquième chapitre, nous abordons le problème de la réglementation sous un angle plus concret que ne le font les modèles théoriques, et en tenant compte des principales interdépendances entre les coûts de production et les coûts de réseau. Nous insistons sur les aspects du problème spécifiques à l'électricité (par rapport aux modèles théoriques généraux).
Le sixième chapitre est consacré à une discussion moins formalisée de l'équilibre réglementaire à long terme nécessaire à la régulation d'un système
électrique ouvert. Il met en perspective certaines pratiques réglementaires observées. Il pose la question essentielle de l'arbitrage entre consommateurs 'domestiques' et industriels.
Enfin la conclusion récapitule l'essentiel des résultats de l'étude, en évalue la portée et propose des voies de recherche
Chebel-Horstmann, Nadia. "Le régime juridique de l'accès aux réseaux électriques en France." Paris 2, 2004. https://acces-distant.sciences-po.fr/http/www.harmatheque.com/ebook/la-regulation-du-marche-de-l-electricite-concurrence-et-acces-aux-reseaux.
Повний текст джерелаPotel, Barnabé. "Evolution du mécanisme de délestage fréquence-métrique." Thesis, Université Grenoble Alpes, 2020. http://www.theses.fr/2020GRALT018.
Повний текст джерелаUnder-frequency load shedding is an emergency measure to avoid a total blackout of the electrical system due to a greater consumption of the electrical system than the injected production. This production/consumption difference implies a drop in the frequency of the electrical system which must then draw on the kinetic energy of the machines connected to the electrical system. In the case of the under-frequency load shedding these are major imbalances (from a few percents to several tens of percents) which must be stopped by automatically disconnecting parts of the consumption. Indeed, the stored kinetic energy (indirectly called inertia within the framework of the electrical system) is not sufficient to compensate the imbalance over long periods: the frequency drops quickly in a few seconds/tens of seconds. This under-frequency is synonymous with significant instability and several devices are likely to disconnect automatically to avoid damaging the equipment or because the electrical system to which they are connected does not itself appear stable. The European electrical system could, in theory, operate at under frequency if the frequency is greater than 47.5 Hz, which is the frequency of automatic disconnection of nuclear power plants. The European electrical system being interconnected, new network codes are to be implemented in order to harmonize the operations of the under-frequency load shedding plans of each system operator. In this context, the Enedis Smart Grids industrial research chair funded this thesis in order to study depthly the impact of this new load shedding plan as well as the performance of the current implemented scheme. This thesis proposes to make a link between academic research and industry. Initially, three cases of load shedding activation over the European electrical system are studied (two of which did not allow the blackout to be contained), which then makes it possible to study the theoretical configuration of a traditional under-frequency load shedding scheme. Then, thanks to data from the consumption of several thousands of feeders in France, it is shown that there is a significant impact on the implementation method of a load shedding scheme. Likewise, the impact of the integration of decentralised generation is considered with regard to the different methods for implementing a load shedding plan. Finally, a more academic, prospective part made it possible to show that by slightly modifying the load shedding algorithms, it is possible to improve the load shedding response in order to best shed the consumption corresponding to the imbalance
Ghahremani, Esmaeil. "Contribution to Wide Area Control of Power Systems." Thesis, Université Laval, 2013. http://www.theses.ulaval.ca/2013/29450/29450.pdf.
Повний текст джерелаThe main goal of power system is to convert the energy from one of its natural forms to the electrical form and deliver it to the costumers with the best quality. So far, the complexity of power system is continually increasing because of the growth in interconnections and use of new technologies. Also, the growth of electrical energy demand has forced the power networks to work with the maximum possible capacity and in turn near the stability limits. In this condition, if the system is subjected to a disturbance, the voltage or frequency collapse events would be more probable. Therefore the control equipments, which constitute a multi level control structure, can help the power system to overcome the contingencies. Recent collapse events in the power system networks show the urgent need for such a multi level control structure based on a rapid response technology such as Wide Area Measurement and Control (WAMAC). Nowadays, the wide area measurement and monitoring, which uses the Global Positioning System (GPS) and satellite technology, plays an important role in different parts of power system control strategies to prevent from global or local collapses. The information transferred by this technology would be employed in a master central controller, called wide area controller, to improve the power system dynamic performance during and after disturbances. From this point of view, in this thesis we will present a multi-step plan for system stability improvement and network oscillations damping by implementing a FACTS-based wide-area power oscillation damper (WA-POD) controller. The frrst step of this plan would be the dynamic state estimation of power system using the phasor measurements signals accessible from Phasor Measurement Units (PMUs). The estimated rotor angles of the synchronous machines from the first step, which could show us the network oscillations condition, will be used as the input signals of the wide-area controller. The second step of this plan is to find the best locations of FACTS devices to increase the power transmitted by network, maximize the system loadability and minimize the transmission line losses. After optimal placement of FACTS controllers, the third step is to implement a wide-area damping controller which receives the estimated rotor angles, available from the results of step one, and other information from all over the network, and then modifies the set points of optimized local control utilities such as FACTS device controllers. The implemented wide area controller, which acts as a master controller, sends the reference signals and setpoints to the local FACTS controllers such as UPFC to improve the oscillations damping performance. This result in higher transfer limits across major transmission interfaces and less blackouts in terms of frequency, duration and consequences.
Isnuwardianto, Ibnusaleh. "Elaboration d'une commande optimale multicritères appliquée à la stabilité dynamique d'un réseau électrique : Texte imprimé." Ecully, Ecole centrale de Lyon, 1991. http://www.theses.fr/1991ECDL0005.
Повний текст джерелаNdiaye, Elhadji Mounirou. "L'exploitation des industries de réseau : une analyse économique appliquée aux partenariats public-privé dans la libéralisation des secteurs de l'électricité et des télécommunications au Sénégal." Grenoble 2, 2008. http://www.theses.fr/2008GRE21015.
Повний текст джерелаBecause of their specific characteristics (externalities, ladder economies, costs set up students), the network industries are natural monopolies. Traditionally, the public monopoly allowed also protecting the public service falling to a government, financially stronger than the private sector while the financial market was non-existent. Currently, the public private partnerships (liberalization) allow compensating for the financial lacks of the State and to establish a harshness of management which is necessary to promote the technical progress. Public-private partnerships thus became the new options of exploitation of network industries. The economic theories of contracts, of competition and of regulation constitute the theoretical centring of the liberalizations. They offer the theoretical tools and the support necessary for the setting up of a well-balanced competition and the definition of an adequate contractual frame between the government and his private partners. The efficiency of the liberalization depends on regulation which is an emanation of the global institutional supervision. In Senegal, the liberalization of electricity and telecommunications sectors and the corresponding institutional changes were begun only from 1996. However, it is possible to make a mid-term analysis to draw up a normative approach of the perspectives in terms of regulation and institutional frame (supervision)
Al, Chaer Toufic. "Robust control of multivariable systems : application to a three-phase shunt active filter in low voltage electrical networks." Poitiers, 2008. http://www.theses.fr/2008POIT2352.
Повний текст джерелаLe travail effectué dans cette thèse a pour objectif de combiner les connaissances de deux domaines de recherche : l’automatique et l’ électronique de puissance afin de dégager une méthodologie pour contrôler un filtre actif parallèle triphasé. En effet, ce sujet est largement traité par les spécialistes de l’électronique de puissance pour éliminer les harmoniques de tension et de courant sur un réseau de distribution électrique. La plupart des stratégies de commande sont basées sur la formulation du problème du filtrage actif comme un problème de suivi de consignes classiquement utilisé dans ce domaine. L’ approche que nous proposons est de considérer le problème comme un problème linéaire de rejet de perturbations. La modélisation linéaire du système permet la synthèse d’une loi de commande robuste multivariable en vue d’ une stabilisation robuste et d’ une performance H∞ robuste. Cette loi de commande devra permettre d’ éliminer les harmoniques qui apparaissent sur le réseau, et de maintenir la stabilité et la performance du système vis-à-vis les incertitudes sur les paramètres du modèle. La validité de l’ approche proposée est vérifiée en simulation à partir de l’ outil logiciel Matlab/Simulink, puis par la mise en œuvre sur un banc expérimental
Mogo, Jules Bonaventure. "Improving the deterministic reserve requirements method to mitigate wind uncertainty." Doctoral thesis, Université Laval, 2019. http://hdl.handle.net/20.500.11794/34660.
Повний текст джерелаPower grids are subject to a variety of uncertainties that may expose them to potential safety issues. Interruptions in electricity supply for instance, may result from an unseasonable temperature fluctuations or a power station outage, which are events of stochastic nature involving the weather or the failure of a component in the grid. The result may be sudden imbalances in supply and demand, leading to load interruptions. To plan for such unforeseen events, the grid carries ’reserve’, i.e., additional capacity above that needed to meet actual demand. However, scheduling the appropriate amount of reserve needed for a reliable and cost-effective grid operation is very challenging, especially in the context of increased uncertainties due to liberalization and the large-scale wind electric generators (WEGs) penetration to grid. Traditional grids assume a fixed knowledge of system conditions for the next day. Wind power being very poor to predict, an extra reserve generation to accommodate its uncertainty is required. Because WEGs aren’t built around spinning turbines, conventional units have been left stressed while responding to large and fast variations in the system net load. Given the temporal operating restrictions that limit their flexibility, the properly functioning of the electricity market can be altered as the energy transactions may not be carried out in realtime, exactly as agreed for security reasons. In this context, the use of the deterministic criteria alone as is the case today, may not be economical or reliable in limiting the risk of uncertainty; calling for sophisticated methods based on more-complex characteristics of uncertainty. This thesis proposes reliable and sound solutions to the increased variability and uncertainty in short-term power grid operations emanating from increasing the share of WEGs in the generation mix and competition from electricity markets. The conservativeness of the deter ministic method has been greatly improved with an adjustable extra generation reserve that accounts for the stochastic feature of WEGs. An inherent flexibility–design that attempts to reduce the onus placed on conventional units to balance the system has been considered. In doing so, the jerkings around these units while responding to large and fast variations in the system net load have been considerably mitigated. Adequate market policies that incentivize flexible resources to make their units with higher ramp rates available to follow dispatch signals have been crafted, thereby avoiding potential reliability degradation or costly out-ofmarket actions. A combined Security Constrained Unit Commitment (SCUC) and Optimal Power Flow (OPF) optimization problem that encompasses all the above mentioned goals has been formulated. Translated into a Mixed Integer Quadratic Programming (MIQP) problem that can return a feasible solution with a known optimality level, the SCUC-OPF engine has been used to investigate various effects of grids integration on reducing the overall operating costs associated with more wind power in the system. Last but not least, the effectiveness of our model to withstand contingencies has been done with a probabilistic model benchmark that accounts for the random nature of grid failure. This allows the adjustment of the Day- Ahead Market (DAM) strategy with respect to the Real-Time Market (RTM). Our model is proven to be more acceptable as it is time-saving, and has particular implications for wind integration studies as it can reverse the hidden cost of integrating WEGs to grid.
Straub, Clémentine. "Gestion des congestions et prise de décision dans les réseaux électriques maillés en utilisant des batteries électriques." Electronic Thesis or Diss., université Paris-Saclay, 2021. http://www.theses.fr/2021UPASG013.
Повний текст джерелаPower generation has been undergoing a radical change due to the expansion of renewable energies. The part of the generation which can be characterised as intermittent and scarce is increasing in importance and is creating new overload constraints on electrical grids called congestions. In this context, batteries are gaining a growing attention for their potential in congestion management. The thesis work contained in this manuscript deals with the conception of new algorithms relying on batteries to solve congestions on meshed electrical grid. The presented control strategy mingle batteries actions and renewable curtailment. The control is based on two levels. The upper level relates to planification and the lower level is dedicated to real-time congestion management. The lower level is developped using Model Predictive Control and provides a framework to take into account delays on control actions. The upper level covers the batteries trajectories planning, supports the lower level and defines batteries capacity used for real-time congestion management and the residual capacities of these batteries. This level can thus be used to define a multi-service framework for batteries. The residual capacities can be offered to other actors or services of the electrical market.The developped algorithms are implemented on a project conducted by the french Transmission System Operator (RTE) : the RINGO Project. This project is a demonstrator program whose aim is to validate large capacity storage as a solution to congestions
El, Khodary Mohammed. "Libéralisation des marchés et stratégies de développement des entreprises électriques européennes." Amiens, 2010. http://www.theses.fr/2010AMIE0052.
Повний текст джерелаPollentes, Michel. "Sur l'utilsation de modèles de laboratoire pour l'étude de la tenue au contournement des isolateurs pollués." Toulouse 3, 1995. http://www.theses.fr/1995TOU30175.
Повний текст джерелаXu, Jianhong. "Filtrage actif parallèle des harmoniques des réseaux de distribution d'électricité." Vandoeuvre-les-Nancy, INPL, 1994. http://docnum.univ-lorraine.fr/public/INPL_T_1994_XU_J.pdf.
Повний текст джерелаXémard, Alain. "Modélisation électromagnétique des effets de la foudre sur les réseaux d'énergie électrique." Ecully, Ecole centrale de Lyon, 2008. http://bibli.ec-lyon.fr/exl-doc/TH_T2103_axemard.pdf.
Повний текст джерелаThis P. H. D work is devoted to the study of some aspects of the effect of lightning on distribution and transmission electrical networks. It was motivated by the will to dispose of methods allowing to avoid some of the negative effects of lightning over-voltages which may propagate along electrical systems (destruction of apparatuses, short-circuits leading to voltage dips, e. T. C. ). Different scientific issues are considered. At first we analyse the different experimental data regarding lightning current available today in order to determine which ones are the most appropriate to conduct this type of study. Then we examine the issue of induced over-voltages (they are the over-voltages due to lightning strokes having a point of impact located in the vicinity of the electric network). We present a coupling model allowing to representing the coupling between the electromagnetic field due to a lightning stroke and a multi-conductor line whose parameters are varying versus frequency. This model is used in order to determine the risk of failure due to lightning of the apparatuses of a domestic low-voltage client. One use for that a probabilistic method of type quasi-Monte-Carlo. The last part of the thesis is devoted to the study of the flashover rate of transmission overhead lines. This rate corresponds to the average number of insulator string flashovers per year and for 100 km of line. It allows to estimate the lightning behaviour of transmission lines. We present a numerical method calculating this rate automatically which is based on the use of the electromagnetic transient calculation software EMTP-RV. Then we apply this method to study several solutions allowing to reduce the flashover rate in several configurations. We focus more specifically on the use of line arresters. Line arresters are voltage limiters installed in parallel with insulator strings allowing to limit the overvoltage between the terminals of the insulator strings at a value lower than their withstand voltage. This solution is relatively new and required numerous optimisation in order to install line arresters in a way which conciliates a reasonable cost and a good efficiency regarding the reduction of the flashover rate
Tran, Van Giang. "Conception optimale d’une centrale électrique virtuelle intégrant des énergies renouvelables." Perpignan, 2010. http://www.theses.fr/2010PERP0998.
Повний текст джерелаThe present work deals with the necessary development of a virtual power plant allowing managing energy production systems and promoting renewable energy for the Perpignan Méditerranée agglomeration community (Pyrénées-Orientales, France). First, are presented the worldwide energy context, the state of the art about virtual power plants as well as the proposed approach for managing energy resources. Next, a methodology allowing forecasting the electric load and meteorological parameters, such as both the mean average wind speed and the global solar irradiation, are proposed and integrated as a module in the virtual power plant. Scenarios and energy strategies were developed with the purpose of satisfying the electricity demand, using renewable energy. Storing energy as well as buying or selling on the Powernext market was also considered. Finally, the proposed tool opens the possibility of optimally sizing new production systems. According to both the intensive growth of the electricity market and the greenhouse gas emissions, the developed virtual power plant focuses on improving energy efficiency and favouring environmental protection
Zmajkovič, Peter. "Modélisation du contournement électrique et validation expérimentale du mécanisme proposé pour l'extension de la décharge." Toulouse 3, 1996. http://www.theses.fr/1996TOU30239.
Повний текст джерелаHadj, said Ahmed. "Intégration du stockage dans les méthodes de planification des réseaux électriques basse tension." Thesis, Université Grenoble Alpes (ComUE), 2018. http://www.theses.fr/2018GREAT004/document.
Повний текст джерелаThe opening up of energy markets and new uses have led to significant changes in distribution grids, in particular low-voltage grids. Notably, it has led to an augmentation in the integration of renewable energy production, an increase in the peak consumption, among others. This is accompanied by the appearance of the electrical constraints with which power systems must cope. This has resulted in the development multiple flexibility capabilities such as load/source management or energy storage, providing new solutions, now to be considered in planning methods. This thesis studies the issue of energy storage in the low-voltage grid planning. The first part of this thesis studies the impact of storage and photovoltaic production on variables involved in distribution grid planning. In the second part, a method for calculating the cost of losses is adapted to the presence of energy storage and/or PV production. Finally, advanced d operation algorithms are developed to illustrate the economic value of energy storage in LV distribution grid planning, compared to a more expensive conventional planning method
Passelergue, Jean-Christophe. "Interactions des dispositifs FACTS dans les grands réseaux électriques." Phd thesis, Grenoble INPG, 1998. http://www.theses.fr/1998INPG0148.
Повний текст джерелаPower fiow increase and environmental constraints in power Systems hâve led to FACTS (Flexible AC Transmission Systems) devices insertion in order to improve the power System exploitation. Thèse devices are able to cany out some funétions such as the voltage support, the power transfer control and the increase of power transfer capability. Moreover, due to their fast response time, they are an efficient tool for damping low frequency oscillations. This new FACTS devices application is important as power Systems are more and more interconnected and thereby more sensitive to inter-area eîectromechanical oscillations. However, the recourse to several FACTS devices in a power System requires the careful study of the possible controller interaction phenomena between FACTS devices and with others system éléments. This thesis deals with the analysis and resolution of dynamic phenomena due to interaction problems resulting from the insertion of one or several shunt FACTS devices. Sensitivity and influence indices are defined from the controllability and observability notions, respectively, in order to preview the interaction phenomena importance due to a FACTS device insertions and to identify the influence areas of a FACTS device. Thèse indices are applied to a two-area four-machine test system and to a simplified real 29-machine power system. Two coordination methods (" minimax " method and decentralized linear quadratic method) are used to coordinate the FACTS devices themselves and a FACTS device and PSS (Power System Stabilizer) in the two-area four-machine test system
Leclercq, Ludovic. "Apport du stockage inertiel associé à des éoliennes dans un réseau électrique en vue d'assurer des services systèmes." Lille 1, 2004. https://ori-nuxeo.univ-lille1.fr/nuxeo/site/esupversions/c9b51000-1e3c-44ac-9333-ca1a8d18965c.
Повний текст джерелаUrrego, Agudelo Lilliam. "A novel method for the Approximation of risk of Blackout in operational conditions." Thesis, Paris Est, 2016. http://www.theses.fr/2016PESC1071/document.
Повний текст джерелаThe electricity industry can be characterized by several risks: regulatory, adequacy, human error, etc. One of the most outstanding aspects, because of their impact, is related to not supply demand (DNS).To prevent cascading failures, particularly in reliability studies, determinist criteria were applied, such as N-1, which allows to avoid the initial event of failure in the planning and operation of the system. In general, analysis tools for these preventive actions are applied separately for the planning and for the system operation of an electric power. After a cascading failure, considerable efforts must be done to analyze faults to minimize the possibility of a similar event.In spite of all these efforts, blackouts or large cascading failures still happen, although events are considered to be rare due to the efforts of the industry. Indeed, it is a challenge from the point of view of analysis and simulation, due to the large number of possible interactions and their diversity and complexity, to obtain a good prediction of a situation.In our work, a new methodology is proposed to estimate the blackout risk using complex systems models. This approach is based on the use of variables that can be precursors of a DNS event. In other terms, it is based on the study of the dependence or correlation between the variables involved in the blackout risk, and the self organized critically (SOC) property of complex systems.VaR is calculate using the data from the Colombian system and the cost of rationing, for estimate the cost of blackout including economic variables into the technical variables. In addition, traditionally the risk grows with the root square of the time, but with data series than has complex behavior, the rate of growing is higher.Once the SOC conditions are determined, a Statistical Power Flow Model SPFM was executed to simulate the behavior of the system and its variables for the performance of the electrical system. Simulations results were compared to the real operation behavior of the electrical power system.The DC power flow is a simplified model, which represents the complex phenomenon in a simple way, however neglects some aspects of the events of operation of the system that can happen in blackouts. The representation of cascading failures and evolution of the network in a simple model allows the analysis of the temporary relations in the operation of electrical networks, besides the interaction between reliability of short-term and long-term (with improvements network).. This methodology is focused on the operational planning of the following day (day ahead market), but it can be applied to other time scales.The results show that the complex behavior with a power law and the Hurst index is greater than 0.5. The simulations based on our model have the same behavior as the real behavior of the system.For using the complexity theory, the SOC conditions must be established for the day ahead analyzed market. Then an inverse simulation is executed, where the endpoint of the simulation is the current situation of the system, and allows the system to evolve and meet the requisites of criticality auto-organized in a desired point of operation.After simulating the criterion of reliability used in the operation of the electrical system for cascading failures, they are validated by historical failures obtained from the electrical system. These results, allow the identification of lines with the biggest probability to fail, the sequence of associate events, and what simulations of actions of operation or expansion, can reduce the risk of failures of the transmission network.The possible advantage expected for the electrical network are the appropriate evaluation of the risk of the network, the increase the reliability of the system (probabilistic analysis), and a progress of the planning of the risk of the day ahead (holistic analysis) and situational awareness