DOI:10.1007/s40565-017-0272-5 |
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Instantaneous power calculation based on intrinsic frequency of single-phase virtual synchronous generator |
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Author:
Yangyang ZHAO1, Jianyun CHAI1, Shien WANG1, Kai SUN1
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Author Affiliation:
1 The State Key Lab of Power Systems, Department of Electrical Engineering, Tsinghua University, Beijing, China
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Foundation: |
This work is supported by the National Basic Research Program of China (973 Program) (No. 2013CB02708201). |
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Abstract: |
In order to enhance the stability of single-phase microgrid, virtual synchronous generator (VSG) control method is investigated in this paper. Its electromagnetic model and electromechanical model are established to illustrate the performance of VSG. Considering the 2nd fluctuation of fundamental-frequency in the output power, an instantaneous power calculation strategy is proposed based on the intrinsic frequency of single-phase VSG. Besides, a virtual power calculation method is presented to achieve islanded/grid-connected seamless transition. Stability analysis and comparison simulation results demonstrate the correctness of the presented power calculation method. At last, the effectiveness of the proposed approach is verified by comparison experiments of islanded/gridconnected operations in a 500 VA single-phase inverter. |
Keywords: |
Virtual synchronous generator, Single phase inverter, Instantaneous power calculation, Seamless transition |
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Online Time:2017/11/27 |
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