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| Control strategy for inverter-interfaced distributed generation during unbalanced voltage sag considering scenario classification |
| DOI：DOI: 10.19783/j.cnki.pspc.191507 |
| Key Words:unbalanced voltage sag inverter-interfaced distributed generation control strategy voltage support current limitation scenario classification |
| Author Name | Affiliation | | SHI Jiabin | 1. School of Electrical Engineering, Shanghai University of Electric Power, Shanghai 200090, China
2. State Grid Electric Power Research Institute of Shanxi Electric Power Company, Taiyuan 030001, China
3. University of Strathclyde, Glasgow G1 1XQ, United Kingdom | | JI Liang | 1. School of Electrical Engineering, Shanghai University of Electric Power, Shanghai 200090, China
2. State Grid Electric Power Research Institute of Shanxi Electric Power Company, Taiyuan 030001, China
3. University of Strathclyde, Glasgow G1 1XQ, United Kingdom | | CHANG Xiao | 1. School of Electrical Engineering, Shanghai University of Electric Power, Shanghai 200090, China
2. State Grid Electric Power Research Institute of Shanxi Electric Power Company, Taiyuan 030001, China
3. University of Strathclyde, Glasgow G1 1XQ, United Kingdom | | HONG Qiteng | 1. School of Electrical Engineering, Shanghai University of Electric Power, Shanghai 200090, China
2. State Grid Electric Power Research Institute of Shanxi Electric Power Company, Taiyuan 030001, China
3. University of Strathclyde, Glasgow G1 1XQ, United Kingdom | | CAO Zhe | 1. School of Electrical Engineering, Shanghai University of Electric Power, Shanghai 200090, China
2. State Grid Electric Power Research Institute of Shanxi Electric Power Company, Taiyuan 030001, China
3. University of Strathclyde, Glasgow G1 1XQ, United Kingdom | | MI Yang | 1. School of Electrical Engineering, Shanghai University of Electric Power, Shanghai 200090, China
2. State Grid Electric Power Research Institute of Shanxi Electric Power Company, Taiyuan 030001, China
3. University of Strathclyde, Glasgow G1 1XQ, United Kingdom | | BAO Zhengkai | 1. School of Electrical Engineering, Shanghai University of Electric Power, Shanghai 200090, China
2. State Grid Electric Power Research Institute of Shanxi Electric Power Company, Taiyuan 030001, China
3. University of Strathclyde, Glasgow G1 1XQ, United Kingdom | | ZHANG Linnan | 1. School of Electrical Engineering, Shanghai University of Electric Power, Shanghai 200090, China
2. State Grid Electric Power Research Institute of Shanxi Electric Power Company, Taiyuan 030001, China
3. University of Strathclyde, Glasgow G1 1XQ, United Kingdom |
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| Abstract:During voltage sag, the Inverter-Interfaced Distributed Generation (IIDG) may suffer from overcurrent and disconnection, which affect the safe and stable operation of IIDG and the power system. Thus, a new IIDG control strategy considering different operation scenarios is proposed. First, by considering the phase voltage amplitude constraint, a positive sequence components-based voltage support method is established. This maximizes the voltage support capability. To fully use the inverter capacity and ensure its safety, a scenario classification method considering the severity of voltage sag and the active power of the IIDG is presented. Based on the current injection mode of each scenario and the control objectives, the reference currents are calculated to ensure voltage support and current limitation. By delivering the active power and negative sequence reactive power, both system stability and voltage imbalance are improved. Finally, a simulation model with IIDG is established based on Matlab/Simulink. The simulation results verify the effectiveness of the proposed strategy.
This work is supported by National Natural Science Foundation of China (No. 61873159). |
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