Title :
Nonlinear Controller for Cascade H-Bridge Inverter-Based STATCOM
Author :
Yuan, Zhichang ; Song, Qiang ; Liu, Wenhua ; Yu, Qingguang
Author_Institution :
Dept. of Electr. Eng., Tsinghua Univ., Beijing
Abstract :
Cascade H-bridge multilevel inverter technique brings a lot of advantages to static synchronous compensator over conventional multi-pulse STATCOM. Based on the theory of the exact linearization via feedback, a MIMO nonlinear controller is proposed. The averaged model of STATCOM based on cascade multilevel inverter is established and the nonlinear control law is analyzed. Simulation results show, under this controller, STATCOM can achieve fast dynamic control of reactive power, with dc link voltage controlled at almost a constant value. Experimental results of a prototype STATCOM based on 17-level cascade H-bridges inverter are also shown to verify the control law
Keywords :
MIMO systems; nonlinear control systems; reactive power control; static VAr compensators; voltage control; 17-level cascade H-bridge inverter-based STATCOM; MIMO nonlinear controller; dc link voltage control; dynamic control; nonlinear control law; reactive power control; static synchronous compensator; Automatic voltage control; Inverters; Linear feedback control systems; MIMO; Nonlinear dynamical systems; Prototypes; Reactive power control; State feedback; Voltage control; Voltage fluctuations; STATCOM; nonlinear controller;
Conference_Titel :
Transmission and Distribution Conference and Exhibition: Asia and Pacific, 2005 IEEE/PES
Conference_Location :
Dalian
Print_ISBN :
0-7803-9114-4
DOI :
10.1109/TDC.2005.1547181
