Title :
Design of a digital control system for a PWM-based STATCOM
Author :
Barrera, E.C. ; Ugalde, L.E.C. ; Ramos, O.B.
Author_Institution :
Univ. Michoacana de San Nicolas de Hidalgo, Morelia, Mexico
Abstract :
A Static Synchronous Compensator (STATCOM) is a device that can provide reactive power support to an electric power system bus. It consists of a voltage sourced converter connected to an energy storage device on one side and to the power system on the other side. This paper presents the detailed design of the control system for a PWM-based STATCOM. Since the control system is designed to be implemented in a digital signal controller, a discrete-time model of the STATCOM is used. Also, to ensure decoupled control of the reactive and real power exchanged between the power converter and the electric power system, the instantaneous three-phase variables of the STATCOM are described in state-space form by dq-components using Park´s Transformation. The STATCOM control system includes three controllers: the real power controller, the reactive power controller and the capacitor voltage controller. The effectiveness of the control system design is illustrated using digital simulation.
Keywords :
PWM power convertors; static VAr compensators; PWM; STATCOM; capacitor voltage controller; decoupled control; digital control system; digital signal controller; discrete-time model; electric power system bus; reactive power controller; reactive power support; static synchronous compensator; voltage sourced converter; Automatic voltage control; Control system synthesis; Control systems; Digital control; Electric variables control; Power system modeling; Pulse width modulation; Reactive power; System buses; Voltage control; Digital control; power control; reactive power control; static VAR compensators;
Conference_Titel :
Electrical Power & Energy Conference (EPEC), 2009 IEEE
Conference_Location :
Montreal, QC
Print_ISBN :
978-1-4244-4508-0
Electronic_ISBN :
978-1-4244-4509-7
DOI :
10.1109/EPEC.2009.5420376
