Power Flow Control of a Single Distributed Generation Unit

• Published in: IEEE transactions on power electronics Vol. 23; no. 1; pp. 343 - 352
• Main Authors: Min Dai, Marwali, M.N., Jin-Woo Jung, Keyhani, A.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.01.2008; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Algorithm design and analysis; Algorithms; Applied sciences; Circuit properties; Circuits of signal characteristics conditioning (including delay circuits); Control algorithms; Distributed control; Distributed generation (DG); Electric potential; Electric power; Electric, optical and optoelectronic circuits; Electrical engineering. Electrical power engineering; Electrical machines; Electronic circuits; Electronic equipment and fabrication. Passive components, printed wiring boards, connectics; Electronics; Exact sciences and technology; Feedforward; Flow control; Harmonics; Inverters; Load flow control; Newton-Raphson method; Parameter estimation; Power control; power conversion; Power electronics, power supplies; Power flow; Power system harmonics; Reactive power control; Real time; Real time systems; Regulation and control; Simulation; Voltage; Voltage control; Performance evaluation; Parameter estimation; Newton-Raphson method; Power system harmonics; Harmonic analysis; Iterative method; Distributed power generation; Voltage control; Implementation; Power flow control; Reactive power control; Energy quality; Harmonic distortion; System identification; Feedforward; Inverter; Design criterion; Control system; power conversion; Power electronics; Algorithm; Newton Raphson method; Phase locked loop; Power control; System simulation; Electric power production; Effectiveness factor; Service quality; Distributed generation (DG)
• ISSN: 0885-8993; 1941-0107
• DOI: 10.1109/TPEL.2007.911815

This research addresses power flow control problem of a grid-connected inverter in distributed generation applications. A real and reactive power control solution is proposed on the basis of an existing voltage control strategy developed for island operations. The power control solution takes advantage of a newly designed system parameter identification method and a nonlinear feedforward algorithm, both of which are based on Newton-Raphson iteration method and implemented in real time. The proposed power control solution also performs grid-line current conditioning and yields harmonic free grid-line current. A phase locked loop based algorithm is developed as a part of the solution to handle possible harmonic distorted grid-line voltage and maintain harmonic free line current. The effectiveness of the proposed techniques is demonstrated by both simulation and experimental results.