| 引用本文: | 陈丽娟,王致杰.基于改进下垂控制的微电网运行控制研究[J].电力系统保护与控制,2016,44(4):16-21. |
| CHEN Lijuan,WANG Zhijie.Research of operation control of micro-grid based on improved droop control[J].Power System Protection and Control,2016,44(4):16-21 |
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| 摘要: |
| 微电网中，采用下垂控制的微电源，线路阻抗差异、输出电压幅值不等以及微电网复杂结构等因素均会导致微电源输出无功功率不能达到均分的效果，使微电源间出现无功环流。为解决这一问题，提出了一种改进的下垂控制策略。即在传统无功下垂控制中加入线路压降和微电源接入点电压幅值反馈量作为无功下垂控制的补偿量，有效跟踪微电网电压变化，改善输出电压幅值不等的状况。在Matlab/Simlink中搭建微电网仿真模型。仿真结果表明，改善的下垂控制能够大大提高无功均分的分配精度，提高微电网的系统稳定性。 |
| 关键词: 微电网 下垂控制 无功环流 线路压降 电压幅值反馈 无功均分 |
| DOI：10.7667/PSPC151113 |
| 分类号: |
| 基金项目:国家自然科学基金(11304200)；上海自然科学基金(14ZR1417200，15ZR1417300)；上海市教委创新基金项目(14YZ157，15ZZ106) |
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| Research of operation control of micro-grid based on improved droop control |
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CHEN Lijuan, WANG Zhijie
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Shanghai Dianji University, Shanghai 201306, China
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| Abstract: |
| In the micro-grid, the output reactive power of distributed generations which adopt droop control strategy couldn’t be arranged in average, because of their line impedance differences, the different output voltage amplitude and complex structure of micro grid and other factors. These could lead to reactive circulating current in distributed generations. To solve the problem, this paper proposes an improved droop control strategy. It adds the voltage drop of line, voltage amplitude feedback as an compensation amount of reactive power droop control in the traditional power droop control in order to effectively track the changes of micro-grid voltage and improve the status of the different voltage amplitude. It establishes the micro-grid simulation model in Matlab/Simulink. And the simulation results show that the improved droop control can greatly improve the distribution accuracy of reactive power sharing and enhance the stability of the micro-grid system. |
| Key words: micro-grid droop control reactive circulating current voltage drop of line voltage amplitude feedback reactive power sharing |
