Journal articles: 'Electric power system stability'

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Xie, Fang Wei, Gang Sheng, Cun Tang Wang, Rui Xuan, Kai Zhang, and Fei Ren. "Power Generation Stability of Hydraulic-Type Wind Power Generation System." Advanced Materials Research 953-954 (June 2014): 357–60. http://dx.doi.org/10.4028/www.scientific.net/amr.953-954.357.

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Due to the defect of the traditional wind power generation equipment, the hydraulic-type wind power generation (HWPG) system has gained extensive attention. In order to study the generating stability of the HWPG system, we established the mathematic model of the off-network HWPG system in this paper; and built its simulation model by using MATLAB/Simulink to investigate the speed and power of the system with the sinusoidal input signal. The simulation results show that the output electric energy of the hydraulic type wind power is unstable. Therefore, to enhance the practical application effects of the off-grid HWPG system, we have to add a storage equipment or speed controller of the motor to improve the quality of output electric energy.

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Abidin, Zainal. "Stabilitas Transien pada Saluran Transmisi dengan Static VAR Compensator (SVC) dan PSS (Power System Stabilizer)." JE-Unisla 5, no. 1 (April 8, 2020): 326. http://dx.doi.org/10.30736/je.v5i1.421.

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In this discussion the modeling of a transmission system consisting of multiple machine. To maintain transient stability and reduce the oscillation of the system SVC and PSS are used. In its operation, the electric power system often experiences short circuit, both permanent and temporary. The short circuit interruption can cause deviations in electric power system variables, such as voltage, frequency, and others. This deviation can affect the stability of the electric power system. Stability in an electric power system is defined as the ability of an electric power system to maintain synchronization during interruptions as well as after disruptions occur.PSS performance is expanding the stability limits of the electric power system by providing synchronous engine rotor oscillation reduction through generator excitation. This damping is provided by the electric torque applied to the rotor in accordance with variations in speed.With Matlab/Simulink, we can examine the role of PSS and SVC in the process of reducing oscillations, changes in rotor angle and engine speed. PSS and SVC can do the damping process quickly from disturbance to stable conditions.

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Zhou, Xue Song, Huan Liang, and You Jie Ma. "The Reviews of Power System Voltage Stability." Applied Mechanics and Materials 339 (July 2013): 545–49. http://dx.doi.org/10.4028/www.scientific.net/amm.339.545.

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Power system voltage stability is one of research hotpots in the field of electric power engineering. Firstly, the application of bifurcation theory in power system analysis is introduced. Secondly, static index which is used frequently in power system analysis is given and the characteristics of every index are clarified in detail. Last, it introduces the analytical methods of dynamic voltage and makes prospect about the voltage stability analysis.

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Tang, Mingrun, Ruoyang Li, Xinyin Dai, Xuefeng Yu, Xiaoyu Cheng, and Shuxia Yang. "New Electric Power System Stability Evaluation Based on Game Theory Combination Weighting and Improved Cloud Model." Sustainability 16, no. 14 (July 19, 2024): 6189. http://dx.doi.org/10.3390/su16146189.

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The development of new electric power system is a requirement for China to realize its “carbon peaking and carbon neutrality goals”, so it is of great importance that we assess the stability of a new electric power system under certain conditions. Firstly, according to the factors affecting the stability of the new power system, the characteristics of the new electric power system are analyzed in depth, so as to establish a stability evaluation index system including four first-level indices of safety, adequacy, flexibility, and adaptability. Secondly, a stability evaluation model is proposed. Based on the game theory, the entropy weight method, criteria importance though intercrieria correlation (CRITIC) method, and coefficient of variation method are combined and assigned, and the cloud model is improved through the combination of weights, which is used for evaluating the stability of the new electric power system. Finally, the applicability of the proposed evaluation model is verified by an arithmetic example analysis, which can identify the vulnerability of the new electric power system and provide suggestions for improving its stability. The model can provide a theoretical basis for promoting energy transition and sustainable development.

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Irwanto, Muhamad, N. Gomesh, Y. M. Irwan, F. Malek, M. R. Mamat, Hermansyah Alam, and M. Masri. "Improvement of Power System Dynamic Stability Based on Fuzzy Logic Power System Stabilizer (FLPSS)." Applied Mechanics and Materials 793 (September 2015): 139–43. http://dx.doi.org/10.4028/www.scientific.net/amm.793.139.

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Generally this project is to improve the dynamic power system stability using fuzzy logic power system stabilizer (FLPSS) which applied to the excitation system. This research is started by electric power system mathematic modelling (state variable equation) and block diagram then set membership function of fuzzy logic power system stabilizer (FLPSS). Block diagram model (plant system) is formed from state variable equation. The plant is controlled by fuzzy logic power system stabilizer (FLPSS) which its input and output from the rotor speed and to excitation system, respectively. To observe the oscillation of dynamic power system stability, the electrical power is varied ± 0.1 pu (positive and negative value indicate an increasing and decreasing electrical power, respectively). The result shows that using FLPSS, the oscillation of dynamic power system can be improved. The overshoot of electric power and rotor speed change oscillation after the disturbance is smaller than the conventional, and also the time to reach the steady state is faster.

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Concordia, Charles. "Power System Stability." IEEE Power Engineering Review PER-5, no. 11 (November 1985): 8–10. http://dx.doi.org/10.1109/mper.1985.5528337.

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Golov, V. P., D. N. Kormilitsyn, and O. S. Sukhanova. "Analysis of influence of controlled high voltage line and automatic excitation control generators on oscillatory steady-state stability of electric-power system." Vestnik IGEU, no. 1 (February 28, 2022): 38–45. http://dx.doi.org/10.17588/2072-2672.2022.1.038-045.

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According to the rules of installation of electricity-generating equipment, synchronous machines (generators, compensators, electric motors) must be equipped with automatic excitation control devices. Their application has a positive effect on the stability indicators and electrical power-engineering system modes. Currently, the development of industry and an increase in the number of consumers require transmission capacity growth of existing 220 kV power transmission lines. The use of controlled series compensation devices can significantly increase the transmission capacity of a power transmission line, however, there is a problem of stable operation of the electric power-engineering system. To choose the methods for control parameters of automatic excitation control and controlled series compensation device, it is advisable to analyze the oscillatory steady-state stability of the electric power-engineering system that contain a controlled 220 kV power transmission line when regulating the excitation of its generators. Methods of mathematical modeling of the electric power system, the theory of long-distance power lines and electromechanical transients, methods of analyzing the stability of electric power systems are used. The original software in the C++ programming language has been used as a modeling tool. The authors have analyzed the influence of controlled series compensation of high voltage transmission line and generators of automatic excitation control on oscillatory steady-state stability of electric power system. The parameters value of regulation of the controlled series compensation device and the automatic excitation control are determined, considering restrictions while maintaining the positive influence of these devices. Zones of stability of the examined electric power-engineering system are formed depending on setup variable of the devices under consideration. The obtained results can be used to enhance oscillatory steady-state stability of electric power system with controlled series compensation device and automatic excitation control systems.

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Oukennou, Aziz, and Abdelhalim Sandali. "Novel Voltage Stability Index for Electric Power System Monitoring." International journal of electrical and computer engineering systems 10, no. 1 (October 21, 2019): 1–9. http://dx.doi.org/10.32985/ijeces.10.1.1.

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This paper aims to develop a novel voltage stability index (NVSI) to evaluate and detect the voltage collapse proximity in the power system. This NVSI is based on the combination of two indices and the approximation made on the difference in angle between the sending bus and the receiving one in the power system. Compared to indices developed in the literature, the advantage of the new voltage stability index (NVSI) is that it can be computed very quickly and easily from power flow results, such as voltages, magnitudes and angles. The static and dynamic studies have been carried out on the IEEE 14-bus test system using PSAT Software. The proposed index has shown more sensitivity and simplicity, and that it can be used as a monitoring tool.

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Sarajcev, Petar, and Dino Lovric. "Manifold Learning in Electric Power System Transient Stability Analysis." Energies 16, no. 23 (November 27, 2023): 7810. http://dx.doi.org/10.3390/en16237810.

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This paper examines the use of manifold learning in the context of electric power system transient stability analysis. Since wide-area monitoring systems (WAMSs) introduced a big data paradigm into the power system operation, manifold learning can be seen as a means of condensing these high-dimensional data into an appropriate low-dimensional representation (i.e., embedding) which preserves as much information as possible. In this paper, we consider several embedding methods (principal component analysis (PCA) and its variants, singular value decomposition, isomap and spectral embedding, locally linear embedding (LLE) and its variants, multidimensional scaling (MDS), and others) and apply them to the dataset derived from the IEEE New England 39-bus power system transient simulations. We found that PCA with a radial basis function kernel is well suited to this type of power system data (where features are instances of three-phase phasor values). We also found that the LLE (including its variants) did not produce a good embedding with this particular kind of data. Furthermore, we found that a support vector machine, trained on top of the embedding produced by several different methods was able to detect power system disturbances from WAMS data.

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Golov, V. P., A. V. Kalutskov, D. N. Kormilitsyn, and O. S. Sukhanova. "Aperiodic steady-state stability criterion of electric power system with controlled series compensation on 200 kV line." Vestnik IGEU, no. 6 (December 28, 2020): 14–24. http://dx.doi.org/10.17588/2072-2672.2020.6.014-024.

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Currently there is a need to synchronize operation of the electric power system in the remote areas and increase of existing lines transmission capacity. The construction of new power transmission lines involves high economic expenditures. Well-known papers consider the issues of application of controlled series compensation devices only for long-distance power transmission lines with voltage of 500 kV and higher to increase the transmission capacity and the level of stability. The aim of the study is to increase the stability and the limit of the transmitted power when controlled series compensation devices are installed on 220 kV lines. It is necessary to develop a criterion of aperiodic steady-state stability of an electric power system with a 220 kV-controlled power transmission line. Methods of mathematical modeling of electric power system, the theory of long-distance power transmission lines and electromechanical transients, and methods of analyzing electric power system stability were used. A.M. Lyapunov’s first approximation method was used to develop a simplified mathematical model. We applied the developed software as a simulation tool. An analysis was carried out to study the influence of series compensation devices regulation coefficients on the aperiodic steady-state stability of the electric power system and the transmission capacity of 220 kV power transmission lines. A change in the modulus of voltage drop at the power transmission and the angle characteristics under the influence of the regulation coefficients of the series compensation device was revealed. A criterion of aperiodic steady-state stability has been developed for systems of this kind with controlled series compensation. It differs from traditional ones by considering the changes in the voltage drop in the power transmission and it allows more accurate estimation of the proximity to the stability threshold. An assessment of aperiodic steady-state stability according to the formulated criterion for an electric power system with a controlled series compensation device on a 220 kV line was obtained. The values of the control coefficients of the series compensation device have been determined. No violation of the steady-state stability occurs under the given values. The results can be used to solve the issues of increasing the transmission capacity of transmission lines to improve the stability of the system.

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Deltuva, Ramūnas, Robertas Lukočius, and Konstantinas Otas. "Dynamic Stability Analysis of Isolated Power System." Applied Sciences 12, no. 14 (July 18, 2022): 7220. http://dx.doi.org/10.3390/app12147220.

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The islanded mode of operation of an electric power system (EPS) that has generation capabilities provided by conventional thermal power plants, by a pumped-storage power station, or from an interlink with a neighboring electric power system through an HVDC BtB converter is addressed in this paper. The risk for electrical power systems to fall into an islanded mode has recently grown, as it is caused not just by technical reasons but by a geopolitical situation as well. The current strains demand the close consideration of problems related to EPS operation in an islanded mode. This paper considers several. The research covers the following issues. The response of the islanded system to a sudden and spasmodic load change is analyzed in cases when the system deals with the disturbance with internal resources alone and with the help of an HVDC BtB converter’s frequency control functionality. Analysis of the impact of the settings of the HVDC BtB converter on the system’s response to disturbances is presented and the optimal set of parameters found. The impact of the system’s extended inertia on the system’s response is evaluated by using an additional unit of the pumped-storage power station in synchronous condenser mode. Transients in the system when switching a unit operating in synchronous condenser mode on and off are analyzed. The capability of the system to withstand major disturbances, such as disconnection of the pumped-storage power station’s unit operating in a pump mode and disconnection of the HVDC BtB converter in emergency modes, if a situation demands, is researched. The research is carried out by numerical simulations using PSS Sincal Electricity Basic software. Updated operating parameters of the isolated power system and the LCC HVDC BtB converter, as well as frequency control automation provided by ABB, were used in the simulations.

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Pavithren, Pavithren, Raman Raghu Raman, Pratap Nair, and K. Nithiyananthan. "Voltage Stability Analysis and Stability Improvement of Power System." International Journal of Electrical and Computer Engineering (IJECE) 5, no. 2 (April 1, 2015): 189. http://dx.doi.org/10.11591/ijece.v5i2.pp189-197.

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<p>The main objective of this research work is to analysis the voltage stability of the power system network and its improvement in the network.voltage stability of a power system. A system enters a state of voltage instability when a disturbance, increase in load demand, or change in system condition causes a progressive and an uncontrollable drop in voltage or voltage collapse. The continuing increase in demand for electric power has resulted in an increasingly complex, interconnected system, forced to operate closer to the limits of the stability. This has necessitated the implementation of techniques for analyzing and detecting voltage collapse in bus bar or lines prior to its occurrence. Simple Newton Raphson algorithm based voltage stability analysis has been carried out. Matlab based simulations for all the factors that causes voltage instability has been implemented and analyzed for an IEEE 30 bus system. The proposed model is able to identify the behavior of the power systems, network under various voltage stability conditions and its possibility of recovery/stability improvement of the power system network has been discussed.</p>

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Rabie, Afaf, Abdelhady Ghanem, Sahar S. Kaddah, and Magdi M. El-Saadawi. "Electric vehicles based electric power grid support: a review." International Journal of Power Electronics and Drive Systems (IJPEDS) 14, no. 1 (March 1, 2023): 589. http://dx.doi.org/10.11591/ijpeds.v14.i1.pp589-605.

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<span lang="EN-US">Grid connected electric vehicles (EVs) can provide energy quality services to ease intermittent renewable energy sources dependent, enhance grid stability performance, reliability and load balancing in the power system. Moreover, incorporating sufficient EVs into the power grid will assist reduce greenhouse gases. However, the unrestrained EVs charging impact the raise of peak request, frequency deflection, voltage instability, power quality from the acceptable limits. It can also cause overloading of the power system equipment and an increase in power losses. In this paper, the influences EV technologies on various energy systems, control scheme strategy, benefits, and motivational challenges are investigated. An overview of the impacts of uncontrolled EV loading on the electric power system and how controlled charging becomes benefit impacts is presented. Moreover, a review of the controlled charge and discharge benefits of EVs and the electrical serving involved in reduction of frequency deviation, voltage stability, power quality improvement is introduced. This review shows that integration of optimal control of EVs with a suitable optimization technique can improve and provide on time multi ancillary services of EV integrated with weak grid. In addition, this review provides research tracks which can be followed by researchers.</span>

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Trinh, Chuong Trong. "THE IMPACT OF A WIND POWER PLANT WITH DOUBLY FED INDUCTION GENERATOR ON THE POWER SYSTEMS." Science and Technology Development Journal 14, no. 1 (March 30, 2011): 46–55. http://dx.doi.org/10.32508/stdj.v14i1.1860.

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In this paper the effect of the wind power plants with Double Fed Induction Generator (DFIG) on the electric power system operation is investigated. The important characteristics such as: voltage quality, grid voltage stability, active and reactive loss of a DFIG at different fault conditions are studied. The simulation results clealy show the effect of the wind power plants on the grid voltage stability and power quality of electric power system.

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Golov, V. P., D. N. Kormilitsyn, and O. S. Sukhanova. "Transmitted power limit of controlled high voltage transmission line for modes on steady-state stability boundary." Vestnik IGEU, no. 2 (April 30, 2023): 28–35. http://dx.doi.org/10.17588/2072-2672.2023.2.028-035.

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The use of series compensation devices is one of the methods to increase the capacity of a power transmission line. In addition, the use of controlled series compensation devices affects the steady-state stability of the electric power system. It is also widely known that automatic excitation control of generators has a positive effect on the stability of the system. Thus, it is reasonable to analyze the influence of the adjustable parameters of the controlled series compensation device on the line capacity when considering modes at the boundaries of the stability regions, taking into account automatic excitation controllers on synchronous generators of the power plant. Methods of mathematical modeling of the electric power system, the theory of long-distance power lines and electromechanical transients, methods of analyzing the stability of electric power systems are used. The original software in the C ++ programming language is used as a modeling tool. The authors have selected the regulation laws parameters of controlled series compensation device and automatic excitation controller, provided that steady-state stability is maintained. The stability regions of the electric power-engineering system under study are constructed depending on the tuning parameters of the considered devices. A technique is proposed to select the coefficients of complex regulation of the devices to increase the capacity of a high-voltage power transmission line. The proposed method of the complex selection of regulation coefficients of controlled devices provides the possibility of obtaining their optimal values in a controlled electric power system to ensure stability.

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Zhou, Hongbo, Aiping Pang, Jing Yang, and Zhen He. "Structured H∞ Control of an Electric Power Steering System." Complexity 2020 (July 25, 2020): 1–9. http://dx.doi.org/10.1155/2020/9371327.

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Electric power steering (EPS) systems are prone to oscillations because of a very small phase angle margin, so a stable controller is required to increase the stability margin. In addition, the EPS system has parameter disturbances in the gain of the torque map under different conditions, which requires a certain degree of robustness in the control design. This paper synthesizes the multidimensional performance requirements considering the stability margin, robustness, and bandwidth of the system to form an H∞ optimization matrix with multidimensional performance output in using the structured H∞ control design. The structured H∞ controller not only retains the characteristics of traditional H∞ controllers with excellent robust performance and high stability margin but also has a lower order, which can be better applied in practice. Based on the performance requirements of the system and practical implementation, the structured H∞ controllers with different orders were designed, and the feasibility of the structured controller was confirmed through comparison and theoretical analysis.

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Richards, M. J. "Power system stability." Power Engineering Journal 5, no. 3 (1991): 103. http://dx.doi.org/10.1049/pe:19910024.

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Shen, Ji Feng, Han Pin Luo, Jian Bo Cao, Rui Kun Wang, Shi Ju E, and Chen Xu. "Control System Design of New Nanoelectric Boiler." Key Engineering Materials 620 (August 2014): 329–34. http://dx.doi.org/10.4028/www.scientific.net/kem.620.329.

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Traditional electric heating boilers have disadvantages, such as low purity of the heating resistor, low electric conversion efficiency, poor stability, high acquisition, maintenance costs and so on. This paper, on the one hand, analyzed the basic rationale of the current electric heating boilers, and on the other hand, the advantages of nanomaterials. Based on the combination of the basic rationale and the advantages mentioned above, this paper then designed a new type of electric heating boilers, including the relevant control system, which used nanoelectric membranes as the heating component. This new nanoelectric boiler adopts a brand-new heating method, and it does not get heat by the combustion of chemical energy. On the contrary, the electrical energy is directly converted into heat. This new nanoelectric boiler is equipped with the intelligent control system, and uses computers to realize complete automation. It has excellent physical stability, high electric conversion efficiency and power factor as well as a large power density, and low-carbon environment. Compared with the conventional products of the same electric power, this new type of electric heating boilers can save 30% to 50% of energy. Besides, it is environmental-friendly and functional.

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Cao, Yan Ling, and Zi Bin Yang. "Research Based on Fuzzy Control of Electric Power Steering System." Applied Mechanics and Materials 596 (July 2014): 739–42. http://dx.doi.org/10.4028/www.scientific.net/amm.596.739.

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For electric power steering (EPS) system to the requirement of real-time and stability of the control system, a fuzzy control algorithm applied to the EPS was proposed, and composed a fuzzy controller for appling to the EPS controller. Taking into account both portability and stability of steering, testing the designed fuzzy controller on EPS experiment platform and adjusting fuzzy control parameters online to make the EPS steering feel the best. Experimental results showed that the proposed fuzzy control algorithm had good tracking performance, can meet the requirements of EPS fast and frequent start-stop and the portability and stability of steering.

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Wang, Jun, and Li Chao Xu. "Electric Hydraulic Power Steering System Simulation Study." Applied Mechanics and Materials 373-375 (August 2013): 154–57. http://dx.doi.org/10.4028/www.scientific.net/amm.373-375.154.

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Properly controlling electro hydraulic power steering system can improve steering performance. The relation of motor speed, vehicle speed and steering speed is gained, according to the influence of motor speed on the steering performance. The force and angle input is set in the driver input model. Rotary valve is simulated by four orifices. The steering resistance between tire and ground is simulated by the coulomb friction on two tips of the rack. The method of double closed-loops PID is used to control the motor. The influence of the control strategy on the steering performance is realized by the simulations of three typical situation, which includes steering portability, road feel, the speed of assist force response and its stability. The results of simulation validate the availability of the control strategy, which is the basic of optimization.

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Gasperic, Samo, and Rafael Mihalic. "Analysis of Voltage Stability in Electric Power System with UPFC." Periodica Polytechnica Electrical Engineering and Computer Science 59, no. 3 (2015): 94–98. http://dx.doi.org/10.3311/ppee.8604.

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Hayashi, Toshiyuki. "Stability Improvement of Electric Power System by HVDC or SVC." IEEJ Transactions on Power and Energy 112, no. 1 (1992): 6–9. http://dx.doi.org/10.1541/ieejpes1990.112.1_6.

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de Oliveira, S. E. M., I. Gardos, and E. P. Fonseca. "Representation of series capacitors in electric power system stability studies." IEEE Transactions on Power Systems 6, no. 3 (1991): 1119–25. http://dx.doi.org/10.1109/59.119255.

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Park, Jong-Hyuk, and In-Whee Joe. "Federated Learning-Based Prediction of Energy Consumption from Blockchain-Based Black Box Data for Electric Vehicles." Applied Sciences 14, no. 13 (June 25, 2024): 5494. http://dx.doi.org/10.3390/app14135494.

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In modern society, the proliferation of electric vehicles (EVs) is continuously increasing, presenting new challenges that necessitate integration with smart grids. The operational data from electric vehicles are voluminous, and the secure storage and management of these data are crucial for the efficient operation of the power grid. This paper proposes a novel system that utilizes blockchain technology to securely store and manage the black box data of electric vehicles. By leveraging the core characteristics of blockchain—immutability and transparency—the system records the operational data of electric vehicles and uses federated learning (FL) to predict their energy consumption based on these data. This approach allows the balanced management of the power grid’s load, optimization of energy supply, and maintenance of grid stability while reducing costs. Additionally, the paper implements a searchable black box data storage system using a public blockchain, which offers cost efficiency and robust anonymity, thereby enhancing convenience for electric vehicle users and strengthening the stability of the power grid. This research presents an innovative approach to the integration of electric vehicles and smart grids, exploring ways to enhance the stability and energy efficiency of the power grid. The proposed system has been validated through real data and simulations, demonstrating its effectiveness and performance in managing black box data and predicting energy consumption, thereby improving the efficiency and stability of the power grid. This system is expected to empower electric vehicle users with data ownership and provide power suppliers with more accurate energy demand predictions, promoting sustainable energy consumption and efficient power grid operations.

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Chen, Hao, Ya Li Yang, and Li Hua Chen. "Study on Boosting Curve for Electric Power Steering System Based on ADAMS." Advanced Materials Research 97-101 (March 2010): 3308–13. http://dx.doi.org/10.4028/www.scientific.net/amr.97-101.3308.

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Electric Power Steering (EPS) is a full electric system, which reduces the amount of steering effort by directly applying the output from an electric motor to the steering system. This research aims at developing EPS boost curve embody into the assist characteristics, improving steer portability and stability. A model for the EPS system has been established, including full vehicle mechanical system, EPS mechanical system, and EPS electric control system. Based on this model, a straight line boost curve was designed and evaluated in this environment to improve the performance of EPS system. Results showed that EPS system with the designed boost curve improved light steering feeling and increased vehicle’s steering stability, and can meet the requirements of steering performance.

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Faizan, Muhammad, and Fazal Muhammad. "Improving Power Quality Using D-STATCOM with Capacitor as Energy Storage System." Pakistan Journal of Engineering and Technology 6, no. 4 (February 26, 2024): 33–41. http://dx.doi.org/10.51846/vol6iss4pp33-41.

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Power electronics are used more frequently to raise awareness of power quality which must be considered when designing modern power systems for effective operation and continuous power supply to various load centers. Otherwise, it will be hazardous for residential and commercial customers, reducing the production of their work due to faults and equipment damage. Electronic technology known as Flexible AC Transmission System (FACTS) may improve power stability to make the electric power system efficient. Oscillation damping in the Power system is still a big concern for operating a safe and dependable power system. The static synchronous compressor (STATCOM) is connected to assist power networks with poor power quality and voltage regulation. Although there are several uses, voltage stability is the most frequently used. An average model of the D-STATCOM control approach is presented in this work to improve the transmission of power quality flow and voltage stability in electric power systems. An increase in system voltage stability, reactive power flow control for different loads, and dynamic response of STATCOM are the primary goals of this research work.

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Koniukhov, A. M., A. V. Khlebnov, and V. A. Timanov. "A method of testing relay protection and automation involving exposure to cascading effects for improved power supply reliability and electric power system stability." Dependability 21, no. 4 (December 28, 2021): 47–52. http://dx.doi.org/10.21683/1729-2646-2021-21-4-47-52.

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The Aim of the paper is to show that improved power supply reliability and electric power system stability are achieved by applying new methods of testing relay protection and automation (RPaA). Major cascading failures in electric power systems are caused by cascading effects, i.e., effects involving several successive effects of various nature. Cascading effects allow extending the functionality while testing RP&A and taking into account the time factor in the context of effects of various nature. Method. A method is proposed for testing relay protection and automation taking into account the cascading effect that is used in the process of development, calibration and installation of protection devices for operation in predefined modes for the purpose of improved power supply reliability and unfailing stability of electric power systems. Result. Intermittent cascading effects do not allow the relay protection and automation recover the electric power system from the post-emergency mode, thus reducing the dynamic stability to the critical level. The diagram of relay protection and automation exposure allows taking into consideration the environmental effects in the process of testing the relay protection and automation. Conclusion. The proposed method of cascading exposure as part of testing relay protection and automation can be used in the process of development, calibration and installation of electric power systems protection and will enable improved stability of electric power systems and reliability of power supply.

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Voropai, Nikolai, Dmitry Efimov, Victor Kurbatsky, and Nikita Tomin. "Stability of intelligent energy system and intelligent control methods." E3S Web of Conferences 139 (2019): 01051. http://dx.doi.org/10.1051/e3sconf/201913901051.

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In modern power systems, a variety of both objects and the tools of control is expected to be much larger than before. As a result, the dynamic properties of these systems are complicated, and the issues of maintaining stability come to the fore. The paper provides a brief overview of the types of stability, including those that, until recently, were considered local in the electric power systems of Russia. It is shown that in today’s conditions the violation of these types of stability affects the operation of the electric power system as a whole. Therefore, the coordination of control of both normal and emergency modes of the systems takes on a special role and should become more intelligent. In this regard, a brief overview of machine learning developments of control agents at different levels of the control hierarchy is presented.

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Karami, Mahdi, Norman Mariun, Mohd Amran Mohd Radzi, and Gohar Varamini. "Intelligent stability margin improvement using series and shunt controllers." International Journal of Applied Power Engineering (IJAPE) 10, no. 4 (December 1, 2021): 281. http://dx.doi.org/10.11591/ijape.v10.i4.pp281-290.

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Electric market always prefers to use full capacity of existing power system to control the costs. Flexible alternate current transmission system (FACTS) devices introduced by Electric Power Research Institute (EPRI) to increase the usable capacity of power system. Placement of FACTS controllers in power system is a critical issue to reach their maximum advantages. This article focused on the application of FACTS devices to increase the stability of power system using artificial intelligence. Five types of series and shunt FACTS controllers are considered in this study. Continuation power flow (CPF) analysis used to calculate the collapse point of power systems. Controlling parameters of FACTS devices including their locations are determined using real number representation based genetic algorithm (RNRGA) in order to improve the secure margin of operating condition of power system. The 14 and 118 buses IEEE standard test systems are utilized to verify the recommended method. The achieved results manifestly proved the effectiveness of proposed intelligent method to increase the stability of power system by determining the optimum location and size of each type of FACTS devices.

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Bahloul, Wissem, Mohamed Ali Zdiri, Ismail Marouani, Khalid Alqunun, Badr M. Alshammari, Mansoor Alturki, Tawfik Guesmi, Hsan Hadj Abdallah, and Kamel Tlijani. "A Backstepping Control Strategy for Power System Stability Enhancement." Sustainability 15, no. 11 (June 2, 2023): 9022. http://dx.doi.org/10.3390/su15119022.

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Secure power system operation relies extensively on the analysis of transient stability and control. The dynamics involved in power system control are often complex and nonlinear. Most of the currently existing works approach these frequent problems with nonlinear control techniques, leading to a requirement for specific controller parameter adjustments. In these veins, this paper proposes a new method for stabilizing electric power systems, using nonlinear backstepping control by optimizing the controller’s parameters. The Jaya algorithm and Genetic algorithm are utilized as a powerful meta-heuristic optimization technique to search parameters of an optimal controller. Improvement in system damping, transient stability, and voltage regulation has been achieved by minimizing the integral time absolute error (ITAE) as the objective function. Numerical simulations on an SMIB power system under different fault conditions showed that the proposed method outperforms classical power system stabilizer (PSS) methods, reducing overshoots and settling times and eliminating steady-state errors. These findings highlight the effectiveness of the proposed approach and its potential contribution to the development of advanced nonlinear control techniques for electric power systems. The suggested optimization methods demonstrate superior performance, compared to classical methods, and achieve a reduction of 27.5% in overshoot and 87% in transient time in addition to complete elimination of static error.

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Kataoka, Yoshihiko, and Yukio Shinoda. "Voltage Stability Limit of Electric Power System with Reactive Power Constraints on Generators." IEEJ Transactions on Power and Energy 123, no. 6 (2003): 704–17. http://dx.doi.org/10.1541/ieejpes.123.704.

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Zhou, Jianxu, Chaoqun Li, and Yutong Mao. "Discussion on Operational Stability of Governor Turbine Hydraulic System Considering Effect of Power System." Energies 16, no. 11 (May 31, 2023): 4459. http://dx.doi.org/10.3390/en16114459.

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Hydropower has grown to play an important role in power systems including increasing clean and low-carbon energies, and the effect of electric loads should be basically evaluated for the reliable operation of these systems. For the hydraulic–mechanical–electrical system of the hydropower station, the state equation model for stability evaluation was derived with typical electric load models and elastic models for pipe flow, and after experimental confirmation with a built single-unit setup for a system, the effects of different electrical loads and pipe flow models on typical hydropower systems stability were investigated in detail. The results indicate that for the built single-unit system with different load characteristics, the numerical results were basically consistent with experimental research, and the unit’s regulation performance for the dynamic load was superior to that of the static load. Evident differences existed in the effects of different electric loads on the operational stability, mainly depending on the pipe length and the corresponding models, and an optimum-order elastic model of pipe flow was preferred to reveal the dynamic interactions between different systems. Furthermore, for a typical two-unit system, the potential coupling resonance hydraulic–mechanical–electrical system is pointed out with the preferred-order elastic model of pipe flow.

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Al-Khusaibi, T. M., K. A. Ellithy, and M. R. Irving. "State-of-the-Art Methods for Electric Power Systems Voltage Stability Analysis." Sultan Qaboos University Journal for Science [SQUJS] 5 (December 1, 2000): 247. http://dx.doi.org/10.24200/squjs.vol5iss0pp247-263.

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This paper presents a literature survey on the subject of voltage stability analysis of power systems. The survey describes several published methods and techniques used to determine voltage stability indices. These indices predict proximity to voltage instability and collapse problems. The Q-V and P-V curves; singular value decomposition; modal analysis; test function; reduced determinant; loading margin by multiple power flow solutions; local load margins; thevenin/load impedance; and energy function are the methods which have been decribed in the paper. The methods described are based on the original work that first proposed them. They are based on the power-flow system model, where the variation of real and reactive powers are assumed to be the main parameters driving the system to voltage instability. Some of the described methods were applied on the IEEE 30-bus power system.

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Khujaev, Abumuslim, Chockalingam Aravind Vaithilingam, Ahmad Adel Alsakati, and Jamal Alnasseir. "Stability enhancement of power system with the implementation of power system stabilizer PSS and excitation system IEEE Type-1." Journal of Physics: Conference Series 2120, no. 1 (December 1, 2021): 012022. http://dx.doi.org/10.1088/1742-6596/2120/1/012022.

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Abstract Stability of power system is an ability of an electric power system that reaches its stable condition after fault happens in its network. The system is unstable when one generator loses its stable synchronism performance. This paper investigates the transient stability of an IEEE 9-bus system during faults that happen in different bus locations. Additionally, the analysis contributes to the integration of the exciter IEEE type-1 for synchronous generator and integration of power system stabilizer (PSS) to improve the power angle stability in the power system. The fault at bus 4 has the highest amplitude in which it increases to 77.58 degrees for the power angle of Synchronous Generators (SGs). The absence of PSS showed that the existing system oscillated and it is unstable. However, the integration of PSS enables the system to damp the oscillations of power angle and reduce the settling time to 5.69 seconds during the fault at bus 4. Moreover, the PSS is connected to SGs through the excitation system to improve the stability of the system in relative power angle of SGs, speed deviation, and electrical power of SGs. Hence, the integration of PSS and excitation system enhances the transient stability of the power system.

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PRONYAEVA, L. I., and A. S. KRETOVA. "ASSESSMENT OF THE FINANCIAL RISK MANAGEMENT SYSTEM IN THE ELECTRIC POWER COMPANIES." Central Russian Journal of Social Sciences 18, no. 1 (2023): 141–58. http://dx.doi.org/10.22394/2071-2367-2023-18-1-141-158.

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The purpose of the study is to assess the financial risk management system in organizations in the electric power industry, which allows to determine its most important components, to identify industry-specific risk management features, to establish risk factors and to propose a set of measures to reduce the negative impact of risks on the financial stability of electric power companies. Research methods - generalization and analysis of the scientific basis and practical experience in risk management in the electric power industry; a systematic approach and epistemological principle in assessing the risk management policy, the features of the functioning of management structures, the establishment of risk factors and a set of measures to manage risks in companies in the energy sector. As a result, it was found that the financial risk management system in the organizations of the electric power industry operates within the framework of the overall risk management system. An assessment of the multi-level hierarchical structure of risk management and its powers is given. A grouping of risks specific to electric power companies is made, which includes a group of financial risks, specific risk factors are identified, and measures to compensate them are proposed.

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Ma, You Jie, Yu Zhang, and Xue Song Zhou. "The Research of Voltage Stability in Wind Power System." Applied Mechanics and Materials 316-317 (April 2013): 64–67. http://dx.doi.org/10.4028/www.scientific.net/amm.316-317.64.

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Wind power is a kind of special electric power, because of the volatility of the wind, making voltage stability has become an important research problem wind power system must facing with. Therefore, according to the relevant current research status and the main existent problems of wind power system, expounding the difference of voltage stability between the conventional energy sources and the wind power, and the influence of voltage stability to the power system which caused by wind power system. This paper mainly from the definition and the classification to introduce the voltage stability; from the research contents and methods of static and dynamic voltage stability to analyze power systems which contains wind farms, especially emphasizing the necessity of the bifurcation theory used in power system contains wind power. Finally points out that the research trend of analysis and improvement in this area.

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Barrueto Guzmán, Aldo, Héctor Chávez Oróstica, and Karina A. Barbosa. "Stability Analysis: Two-Area Power System with Wind Power Integration." Processes 11, no. 8 (August 18, 2023): 2488. http://dx.doi.org/10.3390/pr11082488.

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This paper focuses on a comprehensive stability study of a two-area power system with wind power integration and synthetic inertia control in each area, considering the effects of varying the interconnection link. Normally, synthetic inertia proposals are analyzed in one-area systems, in which stability is tested without considering transmission system phenomena, such as coherency. As modern power systems are progressively becoming interconnected, the possibility of forming two or more non-coherent areas is likely, which poses a challenge to synthetic inertia control techniques that use system frequency as a main feedback signal. In this context, this work addresses a crucial gap in the existing literature and provides a valuable starting point for studying more complex interconnected power systems with wind power integration. Simulations were performed in Matlab-Simulink considering a data-driven frequency dynamics model of the Chilean Electric System, and a wind power model with synthetic inertia control H2 norm minimization in each area. The results showed that it is possible to find local optimal feedback gains, preserving the stability of the global system under significant variations in the interconnection link. RoCoF and Nadir indicators are provided, highlighting the benefits of synthetic inertia control, particularly in low-inertia situations.

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Zakharova, Anastasiya A., and Alexander N. Komkov. "Simulation of Electric Drive Self-Start of Head Units at the Oil Pumping Station." Electrotechnical Systems and Complexes, no. 2(43) (June 28, 2019): 35–42. http://dx.doi.org/10.18503/2311-8318-2019-2(43)-35-42.

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The article is concerned with the issues related to the implementation of the group self-starting electric drives of the head pump units at the oil pumping station. Since oil pumping stations are high-risk facilities, this problem is particularly urgent for them because of the stringent requirements for the continuity of the processes of pipe-wire transportation of oil and oil products. The self-start of a group of electric drives of mixed composition in the ETAP software package for the existing oil pumping station has been studied and simulated. The task of ensuring the self-starting of electric motors of precisely a large unit power is considered in order to study their mutual influence on each other. As a result of conducting multiple model experiments, the values of the voltage of static stability and the time of dynamic stability of the electrical system of the enterprise were determined. On the basis of the data obtained, the boundary of the dynamic stability of the system has been built, the optimal conditions for the implementation of group self-starting have been determined, compliance with which allows uninterrupted operation of oil pumping stations during voltage dips in the external power supply system. Particular attention is paid to assessing the settings and the selectivity of existing devices for relay protection and automation since only with their correct detuning, self-starting can expand the area of stable operation of the electrical system and keep electric drives of main pumping units in operation after power failures. On the basis of the performed analysis, a variant of protection of the minimum voltage was proposed taking into account all the features of the implementation of self-starting electric drives of mixed composition at the pump station under consideration. The absence of an abrupt change at the time of dynamic stability is established for an electrical system of mixed composition with electric drives of high unit power at comparable powers of asynchronous and synchronous motor loads. The bifurcation point on the border of dynamic stability is preserved.

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Panikovskaya, Tatiana. "Determination of Equilibrium Points for Steady State Conservative Models." Scientific Journal of Riga Technical University. Power and Electrical Engineering 26, no. 1 (January 1, 2010): 27–30. http://dx.doi.org/10.2478/v10144-010-0015-1.

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Determination of Equilibrium Points for Steady State Conservative ModelsThe development and a more sophisticated structure of electric power systems, the transition towards deregulation and competition between the participants of the electric energy market cause the necessity of a complex steady state analysis, the evaluation of the electric power system stability, with its parameters being changed. The paper addresses the steady state analysis based on algebraic methods. Regular (trivial) and non-regular (additional) equilibrium points for the electric power system conservative model are determined. Changing regular and non-regular equilibrium points in a heavily loaded electric power system is studied.

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Burlov, Vyacheslav, and Maxim Polyukhovich. "System integration of processes of ensuring electric power networks safety under the conditions of impact of meteorological factors." E3S Web of Conferences 289 (2021): 01015. http://dx.doi.org/10.1051/e3sconf/202128901015.

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The problem of the influence of meteorological factors on electric power networks continues to be relevant. For the safe fulfillment of their purpose, electric power networks as an element of the electric power system must guarantee the safety, stability and efficiency of the electric power supply process. To solve the above problems, it is necessary to make decisions based on meteorological observations, since the safety of electric power networks depends on the timely forecasting of meteorological factors. The study examines the possibility of system integration of the process of ensuring the safety of electric power networks and the process of monitoring meteorological factors. In order to increase the level of safety of electric power networks, it is proposed to use a geo information system that collects, processes and transfers meteorological data.

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Chen, Chenxi, Kewei Shi, Yizhao Xiao, Fei Tang, and Lianghua Gong. "Power Network Vulnerability Assessment Based on Electric Power System Cyber Security Simulation Platform." Journal of Physics: Conference Series 2785, no. 1 (June 1, 2024): 012094. http://dx.doi.org/10.1088/1742-6596/2785/1/012094.

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Abstract This paper introduces a modeling approach for the integration of electric power and information networks, along with the creation of an electric power system network simulation platform. The system, achieved through the deep integration of computation, communication, and control technologies, offers new insights into power grid intelligence. The paper discusses the concept of power system vulnerability and presents a modeling scheme that effectively simulates and analyzes power systems. Using the Analytic Hierarchy Process (AHP), the impact of cyber attacks under different load conditions is evaluated, revealing that attacks have more severe consequences under heavy loads. In conclusion, this research contributes to enhancing the security and stability of power systems.

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Xu, Sheng You, Min You Chen, Neal Wade, and Ran Li. "Reliability Evaluation of Electric Power System Containing Distribution Generation." Advanced Materials Research 383-390 (November 2011): 3472–78. http://dx.doi.org/10.4028/www.scientific.net/amr.383-390.3472.

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The application of renewable energy in electric power system is growing rapidly due to enhanced public concerns for adverse environmental impacts and escalation in energy costs associated with the use of conventional energy sources, distribution generation (DG) is recognized as an encouraging and cost effective generation source both in large grid connected systems and small isolated applications. Power output from distribution generation is not readily controllable. High distribution generation penetration can lead to high-risk levels in power system reliability and stability. In order to maintain the system reliability and stability, this paper presents a probabilistic evaluation method that can incorporate the impacts on reliability of new energy utilization in electric power systems. Two procedures designated as equivalent simplifying method and the islanded reliability calculating method are proposed and discussed. In the equivalent simplifying method, the equivalent failure rate and failure during time for a given system at a specified reliability level is determined using system equivalent simplifying. In the islanded probability calculating method, the islanded probability at a load point for a given system containing distribution generation is calculated. The analysis results of example show that the probabilistic evaluation method is feasible for the operator to decide the appreciate capability and detailed location of possible distribution generation in electric power systems, and consequently a desired level of reliability is obtained.

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Tanaka, Kazuyuki, and Minoru Asada. "Fault Calculation Method for Transient Stability Study of Electric Power System." IEEJ Transactions on Power and Energy 112, no. 5 (1992): 391–400. http://dx.doi.org/10.1541/ieejpes1990.112.5_391.

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WeiDong, Li, Yu jiLai, Liu Zhou, and Song JiaHua. "Enhancement of Electric Power System Transient Stability by Changing Network Configuration." IFAC Proceedings Volumes 30, no. 17 (August 1997): 477–83. http://dx.doi.org/10.1016/s1474-6670(17)46451-2.

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Dharmakeerthi, C. H., N. Mithulananthan, and T. K. Saha. "Impact of electric vehicle fast charging on power system voltage stability." International Journal of Electrical Power & Energy Systems 57 (May 2014): 241–49. http://dx.doi.org/10.1016/j.ijepes.2013.12.005.

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Mushtaq, Basit, and Mairaj-Ud-Din Mufti. "Stability Enhancement of Electric Power Systems by Employing Variable Frequency Transformer." IOP Conference Series: Materials Science and Engineering 1228, no. 1 (March 1, 2022): 012013. http://dx.doi.org/10.1088/1757-899x/1228/1/012013.

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Abstract Economical and technical advantages inherent in the coordinated operation of power systems resulted in large-scale grid interconnection. The major concern regarding the interconnection of the neighbouring power systems with relatively weak tie-lines is the appearance of poorly damped electromechanical oscillations. Inter-area (IA) oscillations reduce system stability and transmission capacity, and without an efficient damping mechanism, these oscillations can cause system failure and even lead to large-scale blackouts. In this work, the impact of variable frequency transformer (VFT) on the IA oscillations of a two-area power system connected in series with the tie-line is investigated. The VFT is a recent power transmission technology that offers continuous control over bi-directional power flow with no harmonic injection. The VFT is made up of a rotary transformer for continuously regulated phase shift, as well as a drive system and control that regulates the power flow through the VFT by adjusting the angle and speed of the rotary transformer. The VFT is controlled to increase system damping, and consequently suppress inter-area oscillations. A comprehensive model of the interconnected power system including VFT is developed in the MATLAB/Simulink environment to study the efficacy of the proposed scheme.

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Madhavrao Deshmukh, Shailesh, and Ravi Prakash Mahobia. "Real time Electric Pattern Based Voltage Regulation Model for Improved Power Stability." E3S Web of Conferences 540 (2024): 10027. http://dx.doi.org/10.1051/e3sconf/202454010027.

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Towards effective voltage regulation and power stability, there exist number of approaches available in literature. The methods consider the residual voltage in various power grids in maximizing the power stability. However, the methods suffer to achieve higher performance in power stability and voltage regulation. To handle this issue, an efficient Electric Patter Based Voltage regulation model (EPVRM) is presented in this article. The method maintains the voltage trace belongs to various grids of the power system. Using the traces maintained, the method preprocesses the traces to remove the noisy records. The preprocessed trace has been used to generate the electrical pattern which contains residual voltage of various grid units. Using the electric pattern the method computes Electric Pattern Stability Support (EPSS) towards the required voltage. Based on the EPSS value, the method identifies the most efficient pattern to be scheduled for current cycle. The selected pattern has been scheduled to maintain the power stability. The proposed method improves the performance of voltage regulation and power stability.

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Wang, Wenxuan, and WeifengShi. "Application of new power flow calculation in ship power system." Journal of Physics: Conference Series 2450, no. 1 (March 1, 2023): 012089. http://dx.doi.org/10.1088/1742-6596/2450/1/012089.

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Abstract A relevant mathematical model regarding the calculation of tidal currents in ship power systems is constructed for the actual situation of ship power systems. The nodal is used to verify the applicability of its method in the ship power system. The algorithm program for the ship power system using radiation networks is prepared using MATLAB, and the accuracy of the algorithm is verified by an example. Verification of ship power flow calculation and its stability by Newton method,which will greatly help to improve the operation of the ship’s electric power system.

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Wang, Man, Tianhong Zhou, and Jie Shen. "Development of low power and high voltage RF signal generator." Journal of Physics: Conference Series 2387, no. 1 (November 1, 2022): 012014. http://dx.doi.org/10.1088/1742-6596/2387/1/012014.

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Abstract Ion confinement technology can be widely used in quantum computation and precision measurement. In ion trapping system, ions are stably trapped in ion trap by the action of external forces.Multi-ion confinement requires the joint action of electric field and magnetic field to make the trapped ions overcome the interaction force between ions and be stably confined in the same specific space. Therefore, the stability of the electric force and the magnetic force determines the stability of ion confinement. Although the electric field and magnetic field provided by traditional commercial instruments is stable, it is not conducive to the miniaturization of the device. According to the previous experiment of ion confinement, we have designed a radio frequency(RF) signal generator that can provide continuous low power and stable high voltage RF electric field for multi-ion confinement system to guarantee the stability of trapped ions in quadrupole linear ion trap, also to improve the tapped ions density.

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Gopinath, B., S. Suresh Kumar, and Juvan Michael. "Stability Improvement in Power Systems Using Unified Power Flow Controller (UPFC)." Advanced Materials Research 768 (September 2013): 392–97. http://dx.doi.org/10.4028/www.scientific.net/amr.768.392.

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Flexible AC transmission system (FACTS) is a system composed of static equipments used for ac transmission of electric energy to improve the power transfer capability and to enhance controllability of interconnected network. Unified Power Flow Controller (UPFC) is the most widely used FACTS device for providing fast acting reactive power compensation on high voltage electricity transmission network. This paper deals with the designing of Adaptive Neuro Fuzzy Inference controller (ANFIC) and fuzzy based Particle Swarm Optimization (PSO) controller for the performance analysis of UPFC. The controller have been designed and tested for controlling the real and reactive power of UPFC. Fuzzy-PI controller is used to control the shunt part of UPFC. The system response under high short circuit level is tested on 5-bus system and 118-bus system. Computer simulation by MATLAB/SIMULINK has been used to verify proposed control strategies.

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Journal articles on the topic 'Electric power system stability'

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