| 引用本文: | 吴鸣,吕振宇,宋振浩,吕志鹏,熊雄.独立型虚拟同步化微电网分布式无功-电压二级控制策略[J].电力自动化设备,2022,42(8): |
| WU Ming,Lü Zhenyu,SONG Zhenhao,Lü Zhipeng,XIONG Xiong.Distributed reactive power-voltage secondary control strategy of independent virtual synchronization technology-based microgrid[J].Electric Power Automation Equipment,2022,42(8): |
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| 摘要: |
| 针对独立型虚拟同步化微电网无功-电压控制的初级调节特性，在虚拟同步控制技术的基础上，提出了一种计及虚拟同步变流器剩余无功容量的独立微电网分布式无功-电压二级控制策略。该策略以提高系统无功容量利用率及平均电压水平为目标，通过相邻虚拟同步机控制器间的分布式稀疏通信，实现系统平均无功标幺值及端口平均电压值评估。在此基础上，通过所提分布式二级控制器得到虚拟同步变流器无功-电压下垂参数的最优参考值，从而实现无功功率最优分配与电压调节，在提高系统无功容量利用率的同时改善电能质量。基于MATLAB/Simulink搭建独立型虚拟同步化微电网模型，通过仿真验证了所提策略的有效性及其相较于传统无功-电压调节策略的优越性。 |
| 关键词: 独立微电网 虚拟同步机 无功-电压特性 分布式控制 剩余无功容量 平均电压 |
| DOI：10.16081/j.epae.202204045 |
| 分类号:TM761 |
| 基金项目:国家自然科学基金资助项目(51877201) |
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| Distributed reactive power-voltage secondary control strategy of independent virtual synchronization technology-based microgrid |
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WU Ming1, Lü Zhenyu2, SONG Zhenhao1, Lü Zhipeng1, XIONG Xiong1
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1.China Electric Power Research Institute, Beijing 100192, China;2.School of Electrical and Automation Engineering, Nanjing Normal University, Nanjing 210023, China
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| Abstract: |
| In view of the primary regulation characteristics of reactive power-voltage control in independent virtual synchronization technology-based microgrid, based on the virtual synchronous control technology, a distributed reactive power-voltage secondary control strategy taking into account the remaining reactive power capacity of virtual synchronous converter is proposed for independent microgrid. In order to improve the utilization rate of reactive power capacity and average voltage level of the system, the evaluation of system’s average reactive power unit value and average port voltage value is implemented through distributed sparse communication between adjacent virtual synchronous machine controllers. On this basis, the optimal reference values of reactive power-voltage droop parameters for the virtual synchronous converter are obtained through the proposed distributed secondary controller, so as to realize the optimal allocation of reactive power and voltage regulation, and improve the power quality while improving the utilization rate of reactive power capacity of the system. An independent virtual synchronization technology-based microgrid model is built based on MATLAB/Simulink, and the effectiveness of the proposed strategy and its superiority compared with the traditional reactive power-voltage regulation strategy are verified by simulation. |
| Key words: independent microgrid virtual synchronous machine reactive power-voltage characteristics distributed control remaining reactive power capacity average voltage |
