Mohammad Sarvi
Imam Khomeini International University, Qazvin

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Power Flow Study and Performance of STATCOM and TCSC in Improvement Voltage Stability and Loadability Amplification in Power System Haniyeh Marefatjou; Mohammad Sarvi
International Journal of Applied Power Engineering (IJAPE) Vol 2, No 1: April 2013
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (286.243 KB) | DOI: 10.11591/ijape.v2.i1.pp15-26

Abstract

Power systems operation becomes more important as the load demand increases all over the world. This rapid increase in load demand forces power systems to operate near critical limits due to economical and environmental constraints. The objective in power systems operation is to serve energy with acceptable voltage and frequency to consumers at minimum cost. This paper studies the important power system phenomenon and voltage stability by using continuation power flow method and steady-state modeling of Static Synchronous Compensator (STATCOM) and Thyristor Controlled Series Capacitor (TCSC) for continuation power flow studies has been represented and discussed in details.also this paper studies voltage stability by using continuation power flow method and Comparison between performance of TCSC and STATCOM for improve voltage stability has been done. Case studies are carried on 9 bus network. Simulation is done with PSAT in MATLAB. Power Flow and  Continuation Power Flow is was implemented using Newton-Raphson method. Simulation results show the proper performance of TCSC and STATCOM to improve voltage control and power flows on the lines and significantly increase the loadability margin of power systems.
Compensation of Single-Phase and Three-Phase Voltage Sag and Swell Using Dynamic Voltage Restorer Haniyeh Marefatjou; Mohammad Sarvi
International Journal of Applied Power Engineering (IJAPE) Vol 1, No 3: December 2012
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (440.157 KB) | DOI: 10.11591/ijape.v1.i3.pp129-144

Abstract

DVR is a equipment which was connected in series and adjusting the  loading  voltage  by  feeding  the  voltage  in  system. The  first  installation  was  in 1996. usually DVR  installed  between  sensitive loads feeder and  source in distribution system .The  main  duty, fast support load voltage  (by  fast  detection  algorithm)  during  disturbance  to  avoid  any  disconnection. in this paper approaches to compensate for voltage sag and swell as a common disturbance in voltage transmission and distribution networks is presented. A dynamic voltage restorer based on the dq0 algorithm for three-phase and dynamic voltage restorer based on the average detection method for single-phase are discussed, also in this paper we compare the two methods used to compensate the single-phase and three-phase process. result  of   three-phase and single-phase voltage sag and swell  simulation  has  been  presented  by  MATLAB/SIMULINK.