A Three-Phase Four-Wire Inverter Control Technique for a Single Distributed Generation Unit in Island Mode

• Published in: IEEE transactions on power electronics Vol. 23; no. 1; pp. 322 - 331
• 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; Analytical models; Applied sciences; Buses (vehicles); Circuit properties; Circuits of signal characteristics conditioning (including delay circuits); Comparative analysis; Computer simulation; Control algorithms; Current control; Direct current; Distributed control; Electric currents; Electric potential; Electric, optical and optoelectronic circuits; Electrical engineering. Electrical power engineering; Electrical equipment; Electrical machines; Electronic circuits; Electronic equipment and fabrication. Passive components, printed wiring boards, connectics; Electronics; Exact sciences and technology; Inverters; Modulation; optimal control; power conversion; Power electronics, power supplies; pulsewidth modulation (PWM); Regulation and control; Robust control; robustness; Servomechanisms; Simulation; Sliding mode control; Space stations; Space vector pulse width modulation; stability; variable structure systems; Voltage; Voltage control; pulsewidth modulation (PWM); Sliding mode; Power system harmonics; Unsteady state; Power system stability; Distributed power generation; Implementation; Voltage; inverters; Energy quality; Harmonic distortion; stability; Inverter; Transient response; Voltage regulation; power conversion; robustness; optimal control; Phase reversal; Bus(channel); Sinusoidal wave; Algorithm; Steady state; Phase shifter; Bus system; Current control; Interconnection; Integrated circuit; Discrete time; Three phase circuit; Electric power production; Pulse duration modulation; Service quality; Servomechanism; Comparative study; variable structure systems; voltage control
• ISSN: 0885-8993; 1941-0107
• DOI: 10.1109/TPEL.2007.911816

A control technique is developed for a three-phase four-wire split DC bus inverter of a single distributed generation unit working in island mode. The control technique combines an inner discrete-time sliding mode controlled (DSMC) current loop and an outer robust servomechanism controlled voltage loop. The control algorithms are developed under stationary alphabeta0 (Clarke's) reference frame and a modified space vector pulsewidth modulation (MSVPWM) is proposed to implement the algorithm under Clarke's reference frame. The proposed technique achieves voltage regulation with low steady state error and low total harmonic distortion and fast transient response under various load disturbances. Meanwhile the usage of MSVPWM in a stationary alphabeta0 reference frame yields better transient performance under limited DC bus voltage compared to conventional uniformly sampled sine wave modulation in ABC reference frame. In this paper, besides the development and description of the algorithms, a series of discussions, analysis and studies are performed on the proposed control technique, including the L-C filter design issue, frequency domain closed-current-loop and closed-voltage-loop responses, and time domain simulations and experiments under various load conditions. All the analysis, simulations, and experiments demonstrate the effectiveness of the proposed control solution.