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| Virtual Complex Impedance Power Distribution Method for Micro-Source Inverter Based on Coordinate Transformation |
| Zhang Bo1, Li Dongxue1, Yan Xiangwu1, Huang Yibin2, Wang Desheng1 |
1. Key Laboratory of Distributed Energy Storage and Micro-Grid of Hebei Province North China Electric Power University Baoding 071003 China;
2. State Grid Hebei Electric Power Corporation Shijiazhuang 050000 China |
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Abstract The impedance characteristics of the line in microgrid are closely related to the power decoupling control of micro sources inverter, circulation suppression, power quality and so on. Traditional virtual impedance control can easily cause voltage drop of common connection point, control robustness difference, and the deficiency of system instability caused by line resistance drift, a virtual complex impedance power sharing method for micro sources inverter based on coordinate transformation is proposed, the power output of parallel micro sources inverter is decoupled precisely and the equivalent line impedance is matched by virtual complex impedance control loop, the load power is effectively distributed according to the capacity ratio of the micro sources inverter. Simulation and experimental results verify the proposed method.
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Received: 19 June 2018
Published: 29 July 2019
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2019, Vol. 34 
