Gotowe bibliografie tematyczne / Power grid systems

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Gotowa bibliografia na temat „Power grid systems”

Autor: Grafiati

Data publikacji: 6 września 2023

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Artykuły w czasopismach na temat "Power grid systems"

Khan, Javeed Ahmad. "Grid connected PV systems and their growth in power system". International Journal of Trend in Scientific Research and Development Volume-2, Issue-3 (30.04.2018): 1791–97. http://dx.doi.org/10.31142/ijtsrd11646.

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Chaurase, Payal, i Pankaj Ramtekkar. "A new design of control & power management strategies of hybrid ac-dc microgrids toward high power quality". Journal of Physics: Conference Series 2089, nr 1 (1.11.2021): 012036. http://dx.doi.org/10.1088/1742-6596/2089/1/012036.

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Abstract The micro grid idea provides for the lack of several reversing switches to unitary AC-DC grid that enables connection and charges (loads) to the electrical systems with changeable regenerative AC and CC sources. Safe operation and gadget safety involve digital integration with utilities/grid through power converters. Enhanced client reliability, decreased input losses, local voltages are supported, and waste heat efficiency increased, voltage drop or interruptible supply of electricity can be customized to satisfy their unique customer demands. Work at present Analyses the performance in grid tie mode of hybrid AC/DC systems. Here are PV systems, PV systems, For the construction of microgrids wind turbine generators and batteries are employed. Convert procedures for the correct coordination of AC sub-grids to DC subs-grids have also been established for converters. MATLAB/SIMULINK environment results are generated.

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Unruh, Peter, Maria Nuschke, Philipp Strauß i Friedrich Welck. "Overview on Grid-Forming Inverter Control Methods". Energies 13, nr 10 (20.05.2020): 2589. http://dx.doi.org/10.3390/en13102589.

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In this paper, different control approaches for grid-forming inverters are discussed and compared with the grid-forming properties of synchronous machines. Grid-forming inverters are able to operate AC grids with or without rotating machines. In the past, they have been successfully deployed in inverter dominated island grids or in uninterruptable power supply (UPS) systems. It is expected that with increasing shares of inverter-based electrical power generation, grid-forming inverters will also become relevant for interconnected power systems. In contrast to conventional current-controlled inverters, grid-forming inverters do not immediately follow the grid voltage. They form voltage phasors that have an inertial behavior. In consequence, they can inherently deliver momentary reserve and increase power grid resilience.

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Meinecke, Steffen, Džanan Sarajlić, Simon Ruben Drauz, Annika Klettke, Lars-Peter Lauven, Christian Rehtanz, Albert Moser i Martin Braun. "SimBench—A Benchmark Dataset of Electric Power Systems to Compare Innovative Solutions Based on Power Flow Analysis". Energies 13, nr 12 (26.06.2020): 3290. http://dx.doi.org/10.3390/en13123290.

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Publicly accessible, elaborated grid datasets, i.e., benchmark grids, are well suited to publish and compare methods or study results. Similarly, developing innovative tools and algorithms in the fields of grid planning and grid operation is based on grid datasets. Therefore, a general methodology to generate benchmark datasets and its voltage level dependent implementation is described in this paper. As a result, SimBench, a comprehensive dataset for the low, medium, high and extra-high voltage level, is presented. Besides grids that can be combined across several voltage levels, the dataset offers an added value by providing time series for a whole year as well as future scenarios. In this way, SimBench is applicable for many use cases and simplifies reproducing study results. As proof, different automated algorithms for grid planning are compared to show how to apply SimBench and make use of it as a simulation benchmark.

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Singh, Ankit Kumar. "UHVDC-Technology Future of India Electricity Transmission". International Journal for Research in Applied Science and Engineering Technology 9, nr VII (20.07.2021): 1620–27. http://dx.doi.org/10.22214/ijraset.2021.36686.

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it's proposed to use highly complex grid controllers to include power grids into one super- grid that may acquire large penetration of inexhaustible powers, without compromising power quality, active and reactive power flow, and voltage and facility stability. The super-grid constructed with ultra- high voltage DC (UHVDC) and flexible ac transmission systems (FACTS) together with dedicated ac and dc interconnectors with intelligent systems applications to supply a wise Integrated Super-Grid. DC interconnectors will segment the whole continent's power systems into five large asynchronous segments (regions). Noncontemporary divisions will prevent ac fault propagation between sections while allowing power exchange between different parts of the super-grid, with minimum difficulty for grid code unification or harmonization of regulatory regimes across the mainland as each segment maintains its accord . a sensible Integrated wattage Super-Grid powered by these technologies is critical in supporting sustained economic process and development; established on the keystone of renewable energy and utilizing over 600GW immeasurable potential of Africa's clean and renewable hydroelectric, photovoltaic and alternative energy as a little of a extensive energy comingle of traditional and complementary energy resources.

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Kebede, Fitsum-Salehu, Jean-Christophe Olivier, Salvy Bourguet i Mohamed Machmoum. "Reliability Evaluation of Renewable Power Systems through Distribution Network Power Outage Modelling". Energies 14, nr 11 (31.05.2021): 3225. http://dx.doi.org/10.3390/en14113225.

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Intermittent power interruptions and blackouts with long outage durations are very common, especially on weak distribution grids such as in developing countries. This paper proposes a hybrid photovoltaic (PV)-battery-system sizing optimization through a genetic algorithm to address the reliability in fragile grids measured by the loss of power supply probability (LPSP) index. Recorded historical outage data from a real stochastic grid in Ethiopia and measured customer load is used. The resulting hybrid-system Pareto solutions give the flexibility for customers/power utilities to choose appropriate sizes based on the required reliability level. To evaluate the sizing solutions’ robustness, this work considers and compares grid outage modeling through two different approaches. The first is a Markov model, developed to be minimally implemented with limited outage data available. The second is a Weibull model, commonly used to describe extreme phenomena and failure analysis. It is more faithful in reproducing the dispersion of outage events. Using these models, the effectiveness and performance of the PV-battery system is verified on a large number of simulated outage scenarios, to estimate the real performance of the optimized design. It leads to a more accurate evaluation of the behavior of a renewable power system to a weak and unreliable electrical grid.

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Consoli, Alfio, Mario Cacciato i Vittorio Crisafulli. "Power Converters For Photovoltaic Generation Systems In Smart Grid Applications". Eletrônica de Potência 14, nr 4 (1.11.2009): 251–57. http://dx.doi.org/10.18618/rep.2009.4.251257.

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Dorothy, R., i Sasilatha Sasilatha. "Smart Grid Systems Based Survey on Cyber Security Issues". Bulletin of Electrical Engineering and Informatics 6, nr 4 (1.12.2017): 337–42. http://dx.doi.org/10.11591/eei.v6i4.862.

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The future power system will be an innovative administration of existing power grids, which is called smart grid. Above all, the application of advanced communication and computing tools is going to significantly improve the productivity and consistency of smart grid systems with renewable energy resources. Together with the topographies of the smart grid, cyber security appears as a serious concern since a huge number of automatic devices are linked through communication networks. Cyber attacks on those devices had a direct influence on the reliability of extensive infrastructure of the power system. In this survey, several published works related to smart grid system vulnerabilities, potential intentional attacks, and suggested countermeasures for these threats have been investigated.

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Rauch, Johannes, i Oliver Brückl. "Achieving Optimal Reactive Power Compensation in Distribution Grids by Using Industrial Compensation Systems". Electricity 4, nr 1 (2.03.2023): 78–95. http://dx.doi.org/10.3390/electricity4010006.

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This paper presents a method for integrating industrial consumers owning compensation systems as alternative reactive power sources into grid operating processes. In remuneration, they receive a market-based provision of reactive power. The aim is to analyze the potential of reactive power compensation systems of industrial companies connected to medium-voltage (10 kV–30 kV) AC grids in order to increase the reactive power ability of distribution grids. Measurement methods and reactive power potential results of six industrial companies are presented to characterize the amount and temporal availability of their reactive power potential. The presented approach for using the decentralized reactive power potential is a centralized reactive power control method and is based on optimal power flow (OPF) calculations. An optimization algorithm based on linear programming is used to coordinate a reactive power retrieval tuned to the actual demand. The influencing quantities are the current grid status (voltage and load flow capacity reserves at grid nodes and power lines) and the current reactive power potential of the reactive power sources. The compensation impact of six measured industrial companies on an exemplary medium-voltage grid is shown by an application example.

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Domino, A., K. Zymmer i M. Parchomiuk. "Selected converter topologies for interfacing energy storages with power grid". Bulletin of the Polish Academy of Sciences Technical Sciences 65, nr 5 (1.10.2017): 579–88. http://dx.doi.org/10.1515/bpasts-2017-0063.

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Abstract The paper presents different solutions applicable in power converter systems for connecting power grids with energy storage systems such as superconducting magnetic energy storage (SMES), supercapacitor energy storage (SES) or chemical batteries. Those systems are characterized by bidirectional current flow between energy storage and power grid. Two-level converters (AC-DC and DC-AC converters) dedicated for low power energy storage compatible with 3×400 V-type power grids are proposed. High power systems are connected with 3×6 kV-type power grids via transformers that adjust voltage to the particular energy storage or directly, based on multilevel power converters (AC-DC and DC-AC) or dual active bridge (DAB) systems. Solutions ensuring power grid compatibility with several energy storage systems of the same electrical parameters as well as of different voltage-current characteristics are also proposed. Selected simulation results illustrating operation of two system topologies of 200 kW power for two-level converter and neutral point clamped (NPC) three-level converter are presented.

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Rozprawy doktorskie na temat "Power grid systems"

Lim, Pei Yi. "Power management strategies for off-grid hybrid power systems". Thesis, Curtin University, 2011. http://hdl.handle.net/20.500.11937/2503.

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At present, there are still a large number of people living in isolated areas, particularly in developing countries, who have no immediate access to the main electricity grid. Most of the energy demands of these remote communities are met by diesel-operated power systems, which are relatively affordable and available. With the ever increasing awareness of climate change, many local authorities have taken initiatives to reduce the carbon footprint of certain energy sectors. In some rural applications, diesel generator power systems are augmented by single or multiple renewable energy supply units to form an off-grid hybrid power system.Generally, the majority of off-grid hybrid power systems include a massive battery bank to store excess renewable energy to supply the user load demand during the period when renewable energy is deficient. In the charging and discharging processes, energy losses may occur due to the inefficiency of the charger and the battery cells. Also, inclusion of an energy storage element into a hybrid power system incurs additional investment costs and involves recycling issues. Therefore, it is necessary to minimise the size of storage, whenever possible, and operate the system under an appropriate power management strategy to ensure efficient system operation.The chosen power management strategy impacts long-term performance of a system as well as components’ longevity. The research presented in this thesis describes the development of an advanced power management concept for the operation of a photovoltaic-variable speed diesel generator hybrid power system.A general introduction regarding the research background to hybrid power system applications and fundamentals of solar energy is presented. A component sizing and control program is developed to facilitate hybrid power system design. Then, various off-grid power system configurations are further discussed with emphasis on the system performances and economic aspects.A prediction technique, namely the Hourly-based Prediction Model for solar irradiance and load demand forecasts is discussed. Forecast algorithms for the hourly solar irradiance and load demand predictions are presented. The proposed prediction models are implemented in the power management strategy for the off-grid photovoltaic-variable speed diesel generator hybrid power system. Assessments of the prediction models through comprehensive analyses of statistical measures are presented.HOMER simulation software has been adopted for time series generation and economic analyses for several off-grid power system configurations. Also, the HOMER simulation results for electrical aspects are used as a benchmark to evaluate the component models developed in this thesis. Due to the fact that HOMER offers limited choices of power management strategy and users do not have access to modify the control algorithms, it is impossible to determine the performance of a system under advanced power management strategy. Therefore, analytical performance models of system components have been developed using the MATLAB/Simulink software to allow the implementation of the proposed power management strategy.The concepts and flow charts of the predictive power management strategy are described. This power management strategy consists of predictive and adaptive dispatch. The time step of the predictive dispatch is fixed to one hour while the time step of the adaptive dispatch is one minute. Operation of the additional generator capacity of the hybrid power system is based on the predicted net load. The adaptive dispatch supports the predictive dispatch to handle fluctuations of net load that occur in between prediction intervals.Simulation results of the performance of hybrid power systems using different types of diesel generator and power management strategies are presented. Particular emphasis is on the comparisons of the system performances using non-predictive and predictive power management strategies. These simulations allow quantitative assessment of the system performances in terms of electrical output, fuel consumption and carbon dioxide emission.Last but not least, the entire research is summarised and concluded with suggestions for future research. In short, the photovoltaic-variable speed diesel generator hybrid power system topology and the proposed power management strategy offer an alternative to the off-grid hybrid power system design, with the aims of overcoming the complex technical issues associated with energy storage and of contributing to market extension of hybrid power systems, particularly in remote locations where financial and technical issues are the major concerns.

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El, Zein Musadag. "Off-grid Wind Power Systems: Planning and Decision Making". Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-396057.

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There are definitely many reasons for choosing off-grid wind power systems. Few key ones involve the positive enhancement of societies, economies and natural environments. From a project developers’ perspective these systems provide a large potential market, which can cover a wide range of applications with relatively reasonable costs. In spite of this, many challenges may interfere with the diffusion and the success of such systems. In the report we discuss the various factors affecting the implementation of off-grid wind power systems and demonstrate some of the challenges project developers may be facing during the planning stage. Some of these include the acceptance of stakeholders (local inhabitants in particular) and the securing of the financing of the projects. Another noted challenge lying outside the control of project developers was found to be the absence of encouraging policies and incentives. As a conclusion the thesis provides a set of self-interpreted recommendations along with a flow chart. The concluded summary indicates some key factors that project developers should be aware of and careful when dealing with, these which include: The choice of the site, verification of projects’ economics along with the securing of a convenient finance. The recommendations also point out the great advantage in having local developers as these tend to be more capable in building relations with the local citizens and politicians.

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Alshogeathri, Ali Mofleh Ali. "Vehicle-to-Grid (V2G) integration with the power grid using a fuzzy logic controller". Thesis, Kansas State University, 2015. http://hdl.handle.net/2097/20606.

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Master of Science
Department of Electrical and Computer Engineering
Shelli K. Starrett
This thesis introduces a Vehicle to Grid (V2G) system which coordinates the charging, and discharging among the Electric Vehicles (EVs) and two-test systems, to help with peak power shaving and voltage stability of the system. Allowing EVs to charge and discharge without any control may lead to voltage variations and disturbance to the grid, but if the charging and discharging of the EVs is done in a smart manner, they can help the power network. In this thesis, fuzzy logic controllers (FLC) are used to control the flow of power between the grid and the electric vehicles. The presented work in this thesis mainly focuses on the control architecture for a V2G station that allows for using EVs batteries to help the grid’s voltage stability. The designed controllers sustain the node voltage, and thus also achieve peak shaving. The proposed architectures are tested on 16 -generator and 6-generator test systems to examine the effectiveness of the proposed designs. Five fuzzy logic schemes are tested to illustrate the V2G system’s ability to influence system voltage stability. The major contributions of this thesis are as follows:   • FLC based control tool for V2G station present at a weak bus in the system. • Investigate the effect of the station location and voltage sensitivity. • Comparison of chargers providing real power versus reactive power. • Simulation of controller and system interactions in a daily load curve cycle. Keywords: State of Charge (SOC), Electric Vehicle (EV), Fuzzy Logic Controller (FLC), Vehicle to grid (V2G), and Power System Voltage Stability.

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Zabihi, Sheikhrajeh Nima. "Vehicle-to-grid (V2G) and grid conditioning systems". Doctoral thesis, Università degli studi di Padova, 2013. http://hdl.handle.net/11577/3426634.

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The term Vehicle-to-Grid (V2G) refers to the technology that enables a bidirectional power exchange between the electric grid and the batteries of plug-in electric vehicles (PEV). V2G technology can be a key element of the intelligent network, which may use the batteries of the vehicle as a system of local storage. The vehicle battery may contribute to the stability of the grid and to meeting the energy demand, especially in peak hours. A PEV needs a bidirectional charger to implement V2G, and, consequently, the studies regarding their design, functionality and efficiency are of the utmost interest. This thesis describes the state of art of these chargers and discusses some aspects of a bi-directional converter and some case studies related to this topic. The main objective of this work is to develop the design and the control algorithms of a bidirectional battery charger with capability to charge the battery of a PEV and simultaneously to act as an active filter for the supply line. After the first introductory chapter, the second chapter reports the terminology used in this field of research. Several smart strategies for charging, approaches for the implementation of the battery chargers for PEVs and the recharging standards are briefly described. The analysis of different types of charger is detailed in chapter three. The conventional battery chargers (CBC) with front-end formed by a diode rectifier, battery chargers with power factor correction (PFC), bi-directional battery chargers (BBC), and integral battery chargers (IBC) are considered. In chapter four, definitions are given of the electrical power in non-sinusoidal conditions, together with some examples of the inadequacies of the classical power theory in describing non-linear phenomena that occur during the operation of a power system. The fifth chapter presents the basic concepts of the theory of instantaneous active and reactive power (also known as p-q theory) applied to the compensation of non-sinusoidal systems. Definition of real, imaginary and zero sequence power are introduced and it is shown how this theory makes it easier to understand the phenomena caused by non-sinusoidal voltages or currents. The theory is particularly suitable for the design of a battery charger when it is seen as a power conditioner. Chapter six is devoted to the basic concepts of shunt active filters. They can perform different types of functions, such as the compensation of current harmonics generated by nonlinear loads to prevent their propagation in the network. The compensation algorithm based on powers defined in reference  is very flexible and therefore the theory of instantaneous power has been considered as the basis for the development of the control system of active filters. Some examples of compensation described in the previous chapter were simulated and the results have been included. In chapter seven, sizing of the power devices that constitute the battery charger is considered in relation to the various auxiliary services that it can provide. The power electronic switches, the coupling inductors and the other passive components have been sized in voltage and current. In chapter eight it is considered a charger that supplies its load and simultaneously compensates for non-linear loads connected nearby. These additional features in terms of power conditioning were quantified in order to determine the capacity of a battery charger that is formed by given active and passive components to support the network acting as an active filter. In the ninth chapter the filter inductances of a battery charger are sized for a specific case study in which it is required the capability to recharge the battery and to inject active power in the network, both in the case of single-phase and three-phase connection. Evaluation of the ripple current is an important requirement for the design of inductors. Therefore a precise calculation was made of this magnitude both in the case of a battery charger connected to the single phase grid and operating according to the PWM technique, and, in the case of connection to the three-phase grid, operating according to the technique SVM. In chapter ten a case study is considered regarding the design of an LCL filter. Chapter eleven contains a theoretical study of resonant controllers. They solve the problem posed by the conventional PI controllers that, when used for the control of alternate quantities as it occurs for the currents of a DC/AC converter, are not able to cancel the steady state error due to the finite gain at the operating frequency. Instead, a resonant controller has a gain ideally infinite at the operating frequency and thus ensures a zero steady-state error. The effectiveness of the resonant regulators has been verified by means of simulations. Chapter twelve deals with the regulations regarding connectors, charging modes and ways of connecting the PEV chargers to the grid. They are intended to define a charging procedure common to all the PEVs and to all the charging infrastructures, whether public or private.
Il termine Vehicle-to-Grid (V2G) si riferisce alla tecnologia che permette uno scambio di potenza bidirezionale tra la rete elettrica e le batterie dei veicoli elettrici di tipo plug-in (PEV). La tecnologia V2G può essere un elemento chiave della rete intelligente, che può utilizzare le batterie dei veicoli come un sistema di accumulo locale. Le batterie dei veicoli possono contribuire alla stabilità della rete e a soddisfare la domanda di energia soprattutto nelle ore di punta. Un PEV ha bisogno di un caricatore bidirezionale per implementare il V2G, e, di conseguenza, gli studi riguardo il loro progetto, la funzionalità e l'efficienza sono del massimo interesse. Questa tesi descrive lo stato dell’arte di questi caricabatteria e tratta alcuni aspetti di un convertitore bidirezionale e alcuni casi di studio relativi a questo argomento. L'obiettivo principale di questo lavoro è di sviluppare il progetto e gli algoritmi di controllo di un caricabatteria bidirezionale con capacità di caricare la batteria di un veicolo plug-in e contemporaneamente di agire come filtro attivo nei confronti della linea di alimentazione. Dopo il primo capitolo introduttivo, nel secondo capitolo viene riportata la terminologia usata in questo campo di ricerca. Vengono anche brevemente descritte diverse strategie intelligenti di ricarica, gli approcci per la realizzazione dei caricabatteria dei PEV e gli standard di ricarica. L’analisi dei vari tipi di caricabatteria viene approfondita nel terzo capitolo. Sono considerati il caricabatteria tradizionale (CBC) con front-end costituito da un raddrizzatore a diodi, il caricabatteria dotato di correttore del fattore di potenza (PFC), il caricabatteria bidirezionale (BBC), e il caricabatteria integrale (IBC). Nel capitolo quattro vengono date le definizioni della potenza elettrica in condizioni non sinusoidali assieme ad alcuni esempi delle inadeguatezze della teoria classica della potenza nel descrivere fenomeni non lineari che si verificano durante il funzionamento di un sistema di potenza. Nel quinto capitolo sono presentati i concetti di base della teoria potenza istantanea attiva e reattiva (nota anche come teoria pq) applicata alla compensazione di sistemi non sinusoidali. Vengono introdotte le definizioni della potenza reale, immaginaria e di sequenza zero e viene mostrato come questa teoria renda agevole la comprensione dei fenomeni causati da tensioni o correnti non sinusoidali. Essa è particolarmente adatta per il progetto di un caricabatteria quando esso viene visto come un condizionatore di potenza. Il capitolo sei è dedicato ai concetti di base dei filtri attivi di tipo shunt. Essi possono svolgere diversi tipi di funzioni, come la compensazione delle armoniche di corrente generate da carichi non lineari impedendo la loro propagazione nella rete. L’algoritmo di compensazione basato sulle potenze definite nel riferimento αβ è molto flessibile e quindi la teoria della potenza istantanea è stata considerata come la base per lo sviluppo del sistema di controllo dei filtri attivi. Alcuni esempi di compensazione descritti nel capitolo precedente sono stati simulati e sono stati riportati i risultati. Nel capitolo sette è considerato il dimensionamento dei dispositivi di potenza che costituiscono il caricabatteria in relazione ai diversi servizi ausiliari che esso può fornire. Sono stati dimensionati in tensione e corrente gli interruttori elettronici di potenza, gli induttori di accoppiamento con la rete e gli altri componenti passivi. Nel capitolo otto viene considerato un caricabatteria che alimenta il proprio carico e contemporaneamente compensa i carichi non lineari connessi nelle vicinanze, costituiti da raddrizzatori. Queste funzionalità aggiuntive in termini di condizionamento della potenza di rete sono state quantificate al fine di determinare la capacità di un caricabatteria costituito da determinati componenti attivi e passivi di supportare la rete svolgendo la funzione di filtro attivo. Nel nono capitolo sono state dimensionate le induttanze di filtro di un caricabatteria per uno specifico caso di studio in cui era richiesta la capacità sia di ricaricare la batteria che di iniettare potenza attiva in rete, sia nel caso di connessione monofase che trifase. La conoscenza dell’ampiezza dell’ondulazione di corrente è un requisito importante per il dimensionamento delle induttanze. Perciò è stato effettuato un calcolo preciso di questa grandezza sia nel caso di un caricabatteria connesso alla rete monofase e operante secondo la tecnica di PWM, sia nel caso di connessione alla rete trifase e adozione della tecnica SVM. Nel capitolo dieci viene considerato un caso di studio riguardo il dimensionamento di un filtro LCL. IL capitolo undici contiene uno studio teorico dei regolatori risonanti. Essi risolvono il problema posto dai convenzionali regolatori PI, che quando sono impiegati per il controllo di grandezze alternate, come accade nel caso delle correnti in un convertitore dc-ac, non sono in grado di annullare l’errore a regime a causa del guadagno finito alla frequenza di funzionamento. Un regolatore risonante presenta invece un guadagno idealmente infinito alla frequenza di funzionamento e quindi garantisce un errore a regime nullo. L’efficacia dei regolatori risonanti è stata verificata per mezzo di simulazioni. Nel capitolo dodici sono riportate le normative riguardanti i connettori, le modalità di ricarica e la connessione dei caricabatteria dei PEV alla rete elettrica. Esse mirano a definire una procedura di ricarica comune a tutti i PEV e tutte le infrastrutture di ricarica, siano esse pubbliche o private.

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Ropp, Michael Eugene. "Design issues for grid-connected photovoltaic systems". Diss., Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/13456.

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Steel, Katherine Deaton. "Energy system development in Africa : the case of grid and off-grid power in Kenya". Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/43840.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Engineering Systems Division, 2008.
Includes bibliographical references.
This research used a combination of a grounded theory approach and system dynamics to study the electric power system in Kenya and to model the feedback at work in the development of the system. The ethnographic study revealed the challenges faced by consumers in choosing between grid and off-grid power options. Examination of this challenge leads to the hypothesis that competition between the grid and off-grid markets is contributing to the low growth in power consumption and that there is the potential for off-grid to become the dominant option in the future. This theory guided the construction of a system dynamics model focusing on consumers' decision-making and their interaction with the operation of the system. I then used the model to explore the dynamics of the system through scenario testing. There were two key outcomes from the model. The first showed that given the parameters chosen in most cases there is a clearly dominant option, although it changes over time. This finding points to the second key outcome the model, which is that there are realistic scenarios under which off-grid generation will become the dominant supply source. This shift could be induced by either reduced overhead on photovoltaic panels or high fuel prices. The outcomes from this research have implications for future electricity planning in Kenya and elsewhere in Africa. In particular, there is a need to decouple the system from external prices or account for the extreme uncertainty in fuel prices. Given the potential shift to large-scale off grid power generation, energy planners also need to look at options for managing a decentralized power system architecture and consider how to build in options for future reintegration if a large-scale centralized generation source comes online.
(cont.) This research has both academic and applied contributions. On the academic side, it extends the range of engineering systems modeling to include qualitative factors found in an African environment. These factors include the addition of reliability and availability of the electric power grid and the biases in decision-making, which differ from those in industrialized countries. While the model clearly has direct application in Kenya, it was designed with flexibility to be expanded to include other countries and regions and could be a useful tool for understanding policy trade-offs in African electrification planning.
by Katherine Deaton Steel.
Ph.D.

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Ramachandran, Jayaraman. "Modelling of grid connected geographically dispersed PV systems for power system studies". Thesis, Northumbria University, 2005. http://nrl.northumbria.ac.uk/3224/.

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The growth of the photovoltaic market indicates that in the near future PV electricity generation may rise to a significant power source. As the proportion of electric power generated from PV systems becomes significant, the effect of these sources on transmission and distribution networks must be considered. This research work has investigated suitable representations of the PV resource and the output power of dispersed PV systems to study the effects of large-scale deployment of PV systems on the grid operation. The representation of solar radiation is very important since this dictates the output power of PV systems. In this work, the simple and reliable Markov Transition Matrix (MTM) method was selected to generate synthetic horizontal solar radiation data. A single MTM was developed to generate half-hour horizontal solar radiation data for different locations in the UK. Large-scale inclusion of PV systems in the UK electricity supply is expected to take the form of a large number of small, geographically dispersed building integrated PV systems. The study also developed a detailed PV cluster model to represent these dispersed PV systems. The variation of PV output power may impact the demand and generation balance on the network requiring additional reserve generation to ensure the system security. In this work, the variation of PV output power and the impact on the reserve requirement was analysed for different penetration levels. This is also the first study to analyse the correlation of solar radiation for different locations in the UK in regard to the impact on reserve requirements. Using data from three locations and according to the National Grid Company (NGC) requirements, it was found that PV capacities of 3750 MW could be added to the present network without additional reserve requirements. The additional reserve required is not on the basis of "MW of reserve per MW of PV capacity". Rather it is based on the aggregation of load demand and of PV output from all regions. The reduction in the reserve requirement by forecasting the weather profile of the day was also illustrated. In this case, a PV capacity of 22,500 MW, which can generate a little over 5% of the UK electricity demand, can be added with minimal increase in system cost. Therefore, the variation of PV output power is unlikely to be a threat to the system security.

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Zhou, Huafeng, i 周華鋒. "Design of grid service-based power system control centers for future electricity systems". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2008. http://hub.hku.hk/bib/B40687429.

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Zhou, Huafeng. "Design of grid service-based power system control centers for future electricity systems". Click to view the E-thesis via HKUTO, 2008. http://sunzi.lib.hku.hk/hkuto/record/B40687429.

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Andreasson, Martin. "Correlated Failures of Power Systems: Analysis of the Nordic Grid". Thesis, KTH, Reglerteknik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-55844.

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The emphasis of this master's thesis is modeling and simulation of failures in large-scale power grids. The linear DC-model governing the active power 　ows is derived and discussed, and the optimal load shedding problem is introduced. Using Monte Carlo simulations, we have analyzed the eects of correlations between failures of power lines on the total system load shed. Correlations are introduced by a Bernoulli failure model with its rst two ordinary moments given explicitly. The total system load shed is determined by solving the optimal load shedding problem in a MATLAB environment using YALMIP and the GLPK solver. We have introduced a Monte Carlo simulation framework for sampling the statistics of the system load shed as a function of stochastic network parameters, and provide explicit guarantees on the sampling accuracy. This framework has been applied to a 470 bus model of the Nordic power grid. It has been found that increased correlations between Bernoulli failures of power lines can dramatically increase the expected value as well as the variance of the system load shed.

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Książki na temat "Power grid systems"

Xuemin, Zhang, Cao Ming i SpringerLink (Online service), red. Power Grid Complexity. Berlin, Heidelberg: Tsinghua University Press, Beijing and Springer-Verlag Berlin Heidelberg, 2011.

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Heier, Siegfried. Grid integration of wind energy conversion systems. Chichester: Wiley, 1998.

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Grid integration of wind energy conversion systems. Wyd. 2. Chichester, West Sussex, England: Wiley, 2006.

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Smart grid dictionary. Wyd. 3. [Charleston, SC?]: GreenSpring Marketing, 2011.

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Hertzog, Christine. Smart grid dictionary. Wyd. 6. Charleston, SC?]: GreenSpring Marketing LLC, 2014.

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Hertzog, Christine. Smart grid dictionary. Wyd. 5. Charleston, SC?]: GreenSpring Marketing LLC, 2013.

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Smart grid dictionary. [United States]: GreenSpring Marketing, 2009.

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Teodorescu, Remus, Marco Liserre i Pedro Rodríguez. Grid Converters for Photovoltaic and Wind Power Systems. Chichester, UK: John Wiley & Sons, Ltd, 2011. http://dx.doi.org/10.1002/9780470667057.

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Teodorescu, Remus. Grid converters for photovoltaic and wind power systems. Chichester: Wiley, 2011.

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Keyhani, Ali. Design of smart power grid renewable energy systems. Hoboken, N.J: Wiley, 2011.

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Części książek na temat "Power grid systems"

Daneshvar, Mohammadreza, Somayeh Asadi i Behnam Mohammadi-Ivatloo. "Overview of the Grid Modernization and Smart Grids". W Power Systems, 1–31. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-64099-6_1.

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Ukil, Abhisek, Yew Ming Yeap i Kuntal Satpathi. "Introduction to DC Grid". W Power Systems, 1–37. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-2977-1_1.

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Haarla, Liisa, Mikko Koskinen, Ritva Hirvonen i Pierre-Etienne Labeau. "Grid Security: Problem Statement". W Power Systems, 3–19. London: Springer London, 2011. http://dx.doi.org/10.1007/978-0-85729-145-5_2.

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Haarla, Liisa, Mikko Koskinen, Ritva Hirvonen i Pierre-Etienne Labeau. "Grid Faults and Component Failures". W Power Systems, 61–78. London: Springer London, 2011. http://dx.doi.org/10.1007/978-0-85729-145-5_5.

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Mei, Shengwei, Xuemin Zhang i Ming Cao. "Foundation of SOC in Power Systems". W Power Grid Complexity, 95–132. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-16211-4_3.

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Abe, Rikiya. "The Mechanism of Synchronous Power Systems". W Digital Grid, 11–21. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-4280-0_2.

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Abe, Rikiya. "Escaping the Curse of Power Systems". W Digital Grid, 45–54. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-4280-0_5.

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Haarla, Liisa, Mikko Koskinen, Ritva Hirvonen i Pierre-Etienne Labeau. "Basic Concepts of Transmission Grid Planning". W Power Systems, 21–36. London: Springer London, 2011. http://dx.doi.org/10.1007/978-0-85729-145-5_3.

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Shah, Yatish T. "Off-grid Hybrid Energy Systems". W Hybrid Power, 419–534. Boca Raton, FL : CRC Press, 2021. | Series: Sustainable energy trategies: CRC Press, 2020. http://dx.doi.org/10.1201/9781003133094-6.

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Osborn, Dale. "Wind Power Grid Integration wind power grid integration : Transmission Planning wind power grid integration transmission planning". W Renewable Energy Systems, 1740–68. New York, NY: Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-5820-3_90.

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Streszczenia konferencji na temat "Power grid systems"

Das, Saurav, Farzam Aidelkhani, Somir Mustak, A. K. M. Baki i M. A. Razzak. "Grid voltage stabilization for smart grid systems". W 2016 IEEE 7th Power India International Conference (PIICON). IEEE, 2016. http://dx.doi.org/10.1109/poweri.2016.8077343.

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Shama, Farzin. "Adaptive Power System Stabilizer Design For Interconnected Power Systems". W 2018 Smart Grid Conference (SGC). IEEE, 2018. http://dx.doi.org/10.1109/sgc.2018.8777865.

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Misak, Stanislav, i Lukas Prokop. "Off-grid power systems". W 2010 9th International Conference on Environment and Electrical Engineering. IEEE, 2010. http://dx.doi.org/10.1109/eeeic.2010.5490003.

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Pahwa, S., A. Hodges, C. Scoglio i S. Wood. "Topological analysis of the power grid and mitigation strategies against cascading failures". W 2010 4th Annual IEEE Systems Conference. IEEE, 2010. http://dx.doi.org/10.1109/systems.2010.5482329.

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"Smart Grid Reliability Assessment". W Power and Energy Systems. Calgary,AB,Canada: ACTAPRESS, 2010. http://dx.doi.org/10.2316/p.2010.684-010.

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"Power Systems and Smart Grid". W 2019 IEEE 28th International Symposium on Industrial Electronics (ISIE). IEEE, 2019. http://dx.doi.org/10.1109/isie.2019.8781472.

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Nelson, Robert E. "Grid-independent residential power systems". W The 2nd NREL conference on thermophotovoltaic generation of electricity. AIP, 1996. http://dx.doi.org/10.1063/1.49689.

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Lammert, Gustav, Tobias Hess, Maximilian Schmidt, Peter Schegner i Martin Braun. "Dynamic grid support in low voltage grids — fault ride-through and reactive power/voltage support during grid disturbances". W 2014 Power Systems Computation Conference (PSCC). IEEE, 2014. http://dx.doi.org/10.1109/pscc.2014.7038468.

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Jia Li i Keith Corzine. "Development of grid-connected inverters for micro-grid". W 2014 Clemson University Power Systems Conference (PSC). IEEE, 2014. http://dx.doi.org/10.1109/psc.2014.6808102.

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Geisler, Kenneth I. "A smarter greener power grid". W 2009 Power Systems Conference (PSC). IEEE, 2009. http://dx.doi.org/10.1109/psamp.2009.5262327.

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Raporty organizacyjne na temat "Power grid systems"

Kroposki, Benjamin. Grid Integration Science, NREL Power Systems Engineering Center. Office of Scientific and Technical Information (OSTI), kwiecień 2017. http://dx.doi.org/10.2172/1354239.

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Stolte, W. PVUSA experience with power conversion for grid-connected photovoltaic systems. Office of Scientific and Technical Information (OSTI), listopad 1995. http://dx.doi.org/10.2172/162188.

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Najm, Habib, i Cosmin Safta. EGSim - a C++ Toolkit for Analysis of Power Grid Systems. Office of Scientific and Technical Information (OSTI), kwiecień 2019. http://dx.doi.org/10.2172/1762344.

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Greacen, Chris, Richard Engel i Thomas Quetchenbach. A Guidebook on Grid Interconnection and Islanded Operation of Mini-Grid Power Systems Up to 200 kW. Office of Scientific and Technical Information (OSTI), kwiecień 2013. http://dx.doi.org/10.2172/1171616.

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Ruhl, R. C. Fuel Cell and Reversible Fuel Cell Modules for Grid-Independent Electric Power Systems. Office of Scientific and Technical Information (OSTI), wrzesień 2000. http://dx.doi.org/10.2172/769149.

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Atcitty, Stanley, i Sarah Hambridge. Multi-Objective Optimization for Power Electronics used in Grid-Tied Energy Storage Systems. Office of Scientific and Technical Information (OSTI), listopad 2014. http://dx.doi.org/10.2172/1762045.

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Nguyen, Ruby, Mike Severson, Bo Zhang, Bjorn Vaagensmith, Md Rahman, Ange-Lionel Toba, Paige Price, Ryan Davis i Sophie Williams. Electric Grid Supply Chain Review: Large Power Transformers and High Voltage Direct Current Systems. Office of Scientific and Technical Information (OSTI), luty 2022. http://dx.doi.org/10.2172/1871501.

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Wills, R. H. The interconnection of photovoltaic power systems with the utility grid: An overview for utility engineers. Office of Scientific and Technical Information (OSTI), czerwiec 1994. http://dx.doi.org/10.2172/10187579.

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Bower, Ward Isaac, Paul Heavener, Lisa Sena-Henderson, Darren Hammell, Mark Holveck, Carolyn David, Abbas Ali Akhil i Sigifredo Gonzalez. Solar Energy Grid Integration Systems. Final Report of the Princeton Power Systems Development of the 100kW Demand Response Inverter. Office of Scientific and Technical Information (OSTI), styczeń 2012. http://dx.doi.org/10.2172/1038162.

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Muelaner, Jody Emlyn. Electric Road Systems for Dynamic Charging. SAE International, marzec 2022. http://dx.doi.org/10.4271/epr2022007.

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Electric road systems (ERS) enable dynamic charging—the most energy efficient and economical way to decarbonize road vehicles. ERS draw electrical power directly from the grid and enable vehicles with small batteries to operate without the need to stop for charging. The three main technologies (i.e., overhead catenary lines, road-bound conductive tracks, and inductive wireless systems in the road surface) are all technically proven; however, no highway system has been commercialized. Electric Road Systems for Dynamic Charging discusses the technical and economic advantages of dynamic charging and questions the current investment in battery-powered and hydrogen-fueled vehicles.

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