Modeling, analysis, and control of a current source inverter-based STATCOM

Author

Shen, Dong ; Lehn, P.W.

Author_Institution

Dept. of Electr. & Comput. Eng., Toronto Univ., Ont., Canada

Volume

17

Issue

1

fYear

2002

fDate

1/1/2002 12:00:00 AM

Firstpage

248

Lastpage

253

Abstract

This paper presents a new approach for the dynamic control of a current source inverter (CSI)-based STATic synchronous COMpensator (STATCOM). The dq-frame model and the steady-state characteristic of the CSI STATCOM are proposed as a basis for control design. Use of traditional PI controllers leads to a poorly damped high frequency oscillation between the inductance and capacitance of the CSI output filter. The new approach includes a fast AC current control inner loop and a slower DC current control outer loop. The inner loop, which is a combination of multivariable full state feedback and integral control, allows for rapid nonoscillatory dynamics of the AC current without overshoot or steady-state error. Experimental tests on a 5-kVA laboratory CSI STATCOM setup validate the proposed control design as well as the simulation results

Keywords

DC-AC power convertors; control system analysis; control system synthesis; electric current control; invertors; multivariable control systems; state feedback; static VAr compensators; 5 kVA; AC current control inner loop; DC current control outer loop; control design; control performance; control simulation; current source inverter-based STATCOM; dynamic control; integral control; multivariable full state feedback; rapid nonoscillatory dynamics; static synchronous compensator; Automatic voltage control; Capacitance; Control design; Current control; Filters; Frequency; Inductance; Inverters; State feedback; Steady-state;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/61.974214

Filename

974214