A Reactive Power Control Method Based on Dynamic Virtual Impedance for PV Micro-grid

被引：0
|
作者：
Zhou, Zipeng [1 ]
Zhao, Hao [2 ]
He, Zhaohui [3 ]
Yang, Peihao [4 ]
机构：
[1] Guangdong Univ Technol, Coll Light Ind & Chem Engn, Guangzhou, Peoples R China
[2] Anqing Normal Univ, Sch Comp & Informat, Anqing, Peoples R China
[3] Nari Grp Corp, State Key Lab Smart Grid Protect & Control, Nanjing, Peoples R China
[4] Xian Thermal Power Res Inst Co Ltd, Xian, Peoples R China
来源：
2022 4TH ASIA ENERGY AND ELECTRICAL ENGINEERING SYMPOSIUM (AEEES 2022) | 2022年
关键词：
photovoltaic AC microgrid; transmission line; reactive power distribution deviation; dynamic virtual impedance;
D O I：
10.1109/AEEES54426.2022.9759737
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
In the AC microgrid system composed of photovoltaic, the inverter is connected to the large grid through the common connection point. Droop control is usually used to maintain the power balance and voltage stability of photovoltaic power supply point, and the voltage stability is realized by reactive power compensation. In the actual photovoltaic microgrid system, due to the transmission line impedance mismatch, there are errors in reactive power distribution. In order to solve this problem, this paper proposes a virtual impedance to improve the accuracy of reactive power distribution, specifically using dynamic virtual impedance to improve the resistance characteristics of the system and compensate for voltage drop. Aiming at the transient impact caused by the voltage surge caused by load removal in photovoltaic microgrid, the changes of active and reactive power are analyzed, and a reactive current control strategy is proposed to stabilize and consolidate the bus voltage. The above strategies are verified by Matlab / Simulink simulation and experiment to verify that the proposed scheme can effectively improve the control performance of photovoltaic microgrid.
引用
收藏
页码：102 / 107
页数：6
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