Title :
Compensation of distribution system voltage sag by DVR and D-STATCOM
Author_Institution :
Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore
Abstract :
This paper describes the techniques of correcting the supply voltage sag in a distribution system by two power electronics based devices called DVR and D-STATCOM. A DVR injects a voltage in series with the system voltage and a D-STATCOM injects a current into the system to correct the voltage sag. The steady state performance of both DVR and D-STATCOM is determined and compared for various values of voltage sag, system fault level and load level. The minimum apparent power injection required to correct a given voltage sag by these devices is also determined and compared. The maximum voltage sag that can be corrected without injecting any active power into the system is also determined. Simulation results indicated that a DVR can correct a voltage sag with much less injected apparent power compared to that of a D-STATCOM
Keywords :
compensation; control system analysis; control system synthesis; power distribution control; power supply quality; reactive power control; static VAr compensators; D-STATCOM; DVR; distribution system voltage sag compensation; minimum apparent power i4jection; power electronics devices; power quality; power system control simulation; series voltage injection; system fault level; system load level; AC generators; Automatic voltage control; Circuit faults; Delay; Power electronics; Power engineering and energy; Power quality; Reactive power; Steady-state; Voltage fluctuations;
Conference_Titel :
Power Tech Proceedings, 2001 IEEE Porto
Conference_Location :
Porto
Print_ISBN :
0-7803-7139-9
DOI :
10.1109/PTC.2001.964609
