Title :
A Method of Compensation Current for DSTATCOM under Asymmetrical Network Voltage
Author :
Sun YunQuan ; Yin Qiang ; Sheng Ji ; Pan WenTing
Author_Institution :
Jiangsu Univ., Zhenjiang, China
Abstract :
A new detection method based on synchronous reference frame is proposed. A single-phase voltage is derived and used to form virtual symmetrical three-phase system. Sine signal and cosine signal are formed in this reference frame. It substitutes the low pass filter by simple integral, delay and gain, which can reduce the detecting delay to 1/6 of source period. The compensation current is derived, which is more accurate than in unbalance voltage conditions. This method needs simple calculation without the phase-locked-loop and can meet load compensation demand of DSTATCOM under asymmetrical voltage conditions. The real-time and effectiveness of the detection method as well as better compensation of compensation currents are verified by simulation results.
Keywords :
power system harmonics; static VAr compensators; DSTATCOM; asymmetrical network voltage; compensation current; single-phase voltage; synchronous reference frame; Delay; Load management; Low pass filters; Phase detection; Phase frequency detector; Phase locked loops; Power harmonic filters; Power system harmonics; Reactive power; Voltage; Average value method; Current detecting; DSTATCOM; Harmonics; Simulation;
Conference_Titel :
Measuring Technology and Mechatronics Automation (ICMTMA), 2010 International Conference on
Conference_Location :
Changsha City
Print_ISBN :
978-1-4244-5001-5
Electronic_ISBN :
978-1-4244-5739-7
DOI :
10.1109/ICMTMA.2010.553
