Control of distributed generation systems-Part I: Voltages and currents control

• Published in: IEEE transactions on power electronics Vol. 19; no. 6; pp. 1541 - 1550
• Main Authors: Marwali, M.N., Keyhani, A.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.11.2004; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Algorithms; Applied sciences; Circuits; Control systems; Control theory; Current control; Digital; Digital control; Digital electronics; Digital modulation; Digital signal processor (DSP); Distributed control; distributed generation system (DGS); Electric potential; Electric power; Electrical engineering. Electrical power engineering; Electronics; Exact sciences and technology; Microprocessors; Power electronics, power supplies; Pulse inverters; Pulse modulation; Pulse width modulation inverters; pulse-width modulation (PWM) voltage inverters; Short circuits; Sliding mode control; Strategy; Voltage; Voltage control; Performance evaluation; Waveform; Prototype; Sliding mode; Voltage control; Implementation; Non linear load; Output voltage; Test method; pulse-width modulation (PWM) voltage inverters; Alternating current; distributed generation system (DGS); Control system; Short circuit conditions; Power electronics; Distributed system; Controller; Experimental study; Current control; Digital control; Robust control; PWM invertors; Harmonics suppression; Experimental result; Digital signal processor (DSP); Algorithm performance; Overload; Three phase circuit; Digital signal processor; Servomechanism
• ISSN: 0885-8993; 1941-0107
• DOI: 10.1109/TPEL.2004.836685

This paper discusses a digital control strategy for three-phase pulse-width modulation voltage inverters used in a single stand-alone ac distributed generation system. The proposed control strategy utilizes the perfect robust servomechanism problem control theory to allow elimination of specified unwanted voltage harmonics from the output voltages under severe nonlinear load and to achieve fast recovery performance on load transient. This technique is combined with a discrete sliding mode current controller that provides fast current limiting capability necessary under overload or short circuit conditions. The proposed control strategy has been implemented on a digital signal processor system and experimentally tested on an 80-kVA prototype unit. The results showed the effectiveness of the proposed control algorithm.