Title :
Research on the control system of cascaded multilevel STATCOM for unbalanced load compensation
Author :
Bo, Yang ; Guang, Zeng ; Yanru, Zhong
Author_Institution :
Dept. of Electr. Eng., Xi´´an Univ. of Technol., Xi´´an, China
Abstract :
For the unbalanced load, a control system of cascaded multilevel STATCOM for 50Hz fundamental frequency modulation + unbalanced load compensation is presented in this paper. The two levels admittance compensation method using ip-iq method + symmetrical components is proposed, the first level of which using ip-iq method is used to filter the harmonics, the last level of which using symmetrical components is to compensate for admittance calculation. The STATCOM system of linear PID controller combined with the method of the admittance compensation calculation has a faster system response speed and higher system robustness. Simulation results verified the effectiveness and feasibility of the imbalance compensation scheme for STATCOM control system.
Keywords :
frequency modulation; load flow control; power harmonic filters; static VAr compensators; three-term control; STATCOM control system; admittance compensation calculation; cascaded multilevel STATCOM; frequency 50 Hz; fundamental frequency modulation; harmonic filter; ip-iq method; linear PID controller; symmetrical component; unbalanced load compensation; Admittance; Automatic voltage control; Harmonic analysis; Phase locked loops; Power harmonic filters; STATCOM; cascaded multilevel; ip-iq method; linear PID; symmetrical components; unbalanced load compensation;
Conference_Titel :
Power Engineering and Automation Conference (PEAM), 2011 IEEE
Conference_Location :
Wuhan
Print_ISBN :
978-1-4244-9691-4
DOI :
10.1109/PEAM.2011.6134802
