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| A Flexible Voltage Control Strategy Based on Stage-Division for Microgrids |
| Yongjun Zhang, Senior Member, IEEE,Kaidong Lin,Wenyang Deng, Member, IEEE,Di Zhang,Dongliang Xiao |
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| Abstract: |
| The occurrence of power flow reversal and off-limit of the voltage on common bus becomes more frequent because of the increasing penetration of renewable energy sources (RES) in microgrids. To guarantee the safe and stable operation, adjusting the power output of RES-based inverters to avoid the off-limit voltage is necessary. Considering the apparent power characteristics of inverters, as well as the minimum participation of active power, a voltage control strategy based on stage division to be within the voltage limit is investigated in this paper. In the case of unknown demand and distribution of loads, the proposed control strategy is able to make full use of the apparent power to regulate voltage using simple calculations, while the performance in economical operation is satisfactory. Simulation results prove the effectiveness of the proposed method on the common bus off-limit voltage adjustment. |
| Key words: Off-limit voltage, microgrids, voltage control, inverter, stage division. |
| DOI：10.23919/PCMP.2023.000137 |
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| Fund:This work is jointly supported by the Guangdong Basic and Applied Basic Research Foundation (No.2022A1515110794) and the Research and Development Program Project in Key Areas of Guangdong Province (No.2021B0101230001). |
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