Title :
A novel method for improving the fault tolerance of transformerless cascade PWM STATCOM
Author :
Zhu, Ming-lei ; Zhao, Rong-xiang ; Zhang, Hao ; Du, Yi
Author_Institution :
Electr. Eng. Coll., Zhejiang Univ., Hangzhou
Abstract :
A novel control method is presented for improving the reliability of transformerless cascade STATCOMs operating under various faults. A modified H bridge circuit is proposed, and it could be totally bypassed under various faults while the STATCOM keep working. During the fault transient, by controlling the phase of a STATCOMpsilas output voltage, the DC capacitors could be charged or discharged to maintain the STATCOMpsilas capability of outputting reactive power. The simulation results about the performances of the proposed method and circuit are given.
Keywords :
fault tolerance; reactive power control; reliability; static VAr compensators; fault tolerance; modified H bridge circuit; power reliability; reactive power; static synchronous compensator; transformerless cascade PWM STATCOM; Automatic voltage control; Capacitors; Circuit faults; Fault tolerance; Flexible AC transmission systems; Medium voltage; Pulse width modulation; Pulse width modulation inverters; Reactive power control; Voltage control;
Conference_Titel :
Electrical Machines and Systems, 2008. ICEMS 2008. International Conference on
Conference_Location :
Wuhan
Print_ISBN :
978-1-4244-3826-6
Electronic_ISBN :
978-7-5062-9221-4
