An accurate power-sharing control method based on circulating-current power model for voltage-source-inverter parallel system

This paper analyzes the voltage-source-inverter parallel system as a multi-input & multi-output system, and proposes the circulating-current mathematical model, the steady-state model and small-signal model of parallel system. Then the phasor models of the circulating-current and the circulating...

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Bibliographic Details
Main Authors: Mingzhi Gao, Canhui Zhang, Maohang Qiu, Weiheng Li, Min Chen, Zhaoming Qian
Format: Conference Proceeding
Language:English
Subjects:
Analytical models
Circulating-current
Droop control
Inverters
Load modeling
Mathematical model
Parallel system
Steady-state
Voltage control
Voltage-source Inverter
Wires
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Summary:This paper analyzes the voltage-source-inverter parallel system as a multi-input & multi-output system, and proposes the circulating-current mathematical model, the steady-state model and small-signal model of parallel system. Then the phasor models of the circulating-current and the circulating-current power are proposed. Subsequently, the mathematical model of traditional droop control is built and analyzed based on the circulating-current power model. According to the analysis of droop control, this paper proposes an accurate parallel control strategy (ω-P cir and V-Q cir control), which can eliminate the circulating-current power and the bias of output voltage frequency and amplitude. Finally, simulation and experiment result are presented, which validates the performance of the proposed method.
ISSN:1048-2334
2470-6647
DOI:10.1109/APEC.2015.7104593