Title :
Hierarchical design and control of 10kV/1Mvar cascade STATCOM
Author :
Song Wang ; Yaohua Li ; Ping Wang ; Pengxian Song ; Longcheng Tan ; Hongtao Ren ; Jin Liu
Author_Institution :
Key Lab. of Power Electron. & Electr. Drive, Inst. of Electr. Eng., Beijing, China
Abstract :
A cascade H-bridge Static Synchronous Compensator (STATCOM) can be directly connected to 10kV distribution power system to inject inductive/capacitive current for load compensation. However, the system has a large number of sub-modules and control strategies are quite complicated. In this paper, a novel hierarchical design and control method is proposed, which divides the system into two layers. One is the central controller system (CCS) responsible for upper-layer control including the total dc-voltage, current tracking and dc-voltage balancing control, etc. The other is the distributed control system (DCS) for H-bridge sub-modules. Moreover, a practical fault-tolerant strategy combined with the proposed DCS is proposed. Finally, the correctness and the feasibility of the hierarchical system are well validated by 10kV/1Mvar industrial prototype.
Keywords :
distributed control; electric current control; fault tolerant control; load regulation; power distribution control; static VAr compensators; voltage control; CCS; DCS; capacitive current; cascade H-bridge static synchronous compensator control system; cascade H-bridge submodule STATCOM hierarchical design; central controller system; current tracking control; dc-voltage balancing control; distributed control system; distribution power system; fault tolerant strategy; inductive current; industrial prototype; load compensation; upper layer control; Automatic voltage control; Capacitors; Fault tolerance; Fault tolerant systems; Pulse width modulation; Reactive power; STATCOM; cascade converter; fault-tolerant strategy; hierarchical design; self-power supply;
Conference_Titel :
Industrial Electronics and Applications (ICIEA), 2014 IEEE 9th Conference on
Conference_Location :
Hangzhou
Print_ISBN :
978-1-4799-4316-6
DOI :
10.1109/ICIEA.2014.6931372
