Torsional interaction studies on a power system compensated by SSSC and fixed capacitor (original) (raw)
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This paper presents a novel design of a dynamic voltage restorer (DVR) which mitigate voltage sags, swell, and phase jumps by injecting minimum active power in system and provides the constant power at load side without any disturbance. The design of this compensating device presented here includes the combination of PWM-based control scheme, dq0 transformation and PI controller in control part of its circuitry, which enables it to minimize the power rating and to response promptly to voltage quality problems faced by today’s electrical power industries. An immense knowledge of power electronics was applied in order to design and model of a complete test system solely for analyzing and studying the response of this efficient DVR. In order to realize this control scheme of DVR MATLAB/SIMULINK atmosphere was used. The results of proposed design of DVR’s control scheme are compared with the results of existing classical DVR which clearly demonstrate the successful compensation of voltage quality problems by injecting minimum active power.
Control Strategies for Dynamic Voltage Restorer Compensating Voltage Sags with Phase Jump
Voltage sags a r e a n important power quality problem a n d t h e dynamic voltage restorer is known as a n effective device t o mitigate voltage sags. I n this paper different control strategies for dynamic voltage restorer a r e analyzed with emphasis p u t on t h e compensation of voltage sags with phase jump. Voltage sags accompanied by a phase j u m p a r e in some cases more likely t o t r i p loads a n d a satisfactory voltage compensation a r e more difficult t o achieve. Different control methods t o compensate voltage sags with phase j u m p a r e here proposed a n d compared. Two promising control methods a r e tested with simulations carried out in Saber a n d finally tested on a 10 kVA rated Dynamic Voltage Restorer in t h e laboratory. Both methods can be used t o reduce load voltage disturbances caused by voltage sags with phase jump. O n e method completely compensates t h e phase j u m p , which is t h e best solution for very sensitive loads. T h e second method does only partly compensate t h e phase j u m p , b u t it is expected t o have a b e t t e r performance in compensating a broader range of voltage sags.
In Phase Compensation of Sag and Swell Voltage by using Dynamic Voltage Restorer
International Journal of Scientific Research in Science, Engineering and Technology, 2019
Today most of the industries and customers are using sensitive and sophisticated electrical equipment based on semiconductor devices, these may causes power quality disturbance. The major problems are voltage sag and swell. The sag and swell not only occur by disturbed power quality but also due to high system tapping at point of common coupling. To overcome this problem and to improve power quality the distribution companies uses various custom power devices. Among the various custom power devices Dynamic voltage restorer is used for compensation in this paper, which is most popular and widely used method. Here, In phase compensation technique of DVR is used with battery energy storage system. The voltage at PCC have been observed. The control technique employed here is SRF theory with PI controller. The overall work is carried out in MATLAB Simulink.
2016
1Master’s scholar,choudhary.vikrant9@gmail.com 2Asso. Prof, Dept. of electrical engineering, 3Asso. Prof, Dept. of electrical engineering, Samrat Ashok Technological Institute Vidisha, Madhya Pradesh ----------------------------------------------------------------------***----------------------------------------------------------------------Abstract-The issue of voltage sag and its extreme effects on sensitive loads is surely understood. To take care of this issue, The DVR is a cutting edge and essential custom power device for remuneration voltage Sags in power distribution system. The Dynamic Voltage Restorer (DVR) is quick, flexible and effective response for voltage Sag issues. The DVR is a solid state compensating device used to mitigate voltage Sags and to reestablish load voltage to its evaluated esteem. In this paper, a diagram of the DVR, its capacities, arrangements, segments, working modes, voltage injection techniques of the DVR yield voltage are looked into alongside th...
Comparative Analysis of Dynamic Voltage Restorer Supported With Bess and Super Capacitor
Dynamic Voltage Restorer (DVR) plays key role in resolving power quality issues like voltage sag, swell, harmonics, interruption etc., which are detrimental in the power system if uncompensated. Further, they improve power transfer capacity of the transmission line. In this research article, the performance of the DVR is analysed under two different scenarios: Battery Energy Storage supported and Super-Capacitor supported dc link. A three phase PLL is used for generating reference signals for the Synchronous Reference Frame based PWM signals. The proposed system is tested through simulation using MATLAB/SIMULINK and the results are compared.