| 基于虚拟电容的微网逆变器无功均分控制策略 |
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| 引用本文： | 徐海珍,张兴,刘芳,石荣亮,毛福斌,倪华.基于虚拟电容的微网逆变器无功均分控制策略[J].电力系统自动化,2016,40(19):59-65. |
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| 作者姓名： | 徐海珍 张兴 刘芳 石荣亮 毛福斌 倪华 |
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| 作者单位： | 合肥工业大学电气与自动化工程学院, 安徽省合肥市 230009,合肥工业大学电气与自动化工程学院, 安徽省合肥市 230009,合肥工业大学电气与自动化工程学院, 安徽省合肥市 230009,合肥工业大学电气与自动化工程学院, 安徽省合肥市 230009,合肥工业大学电气与自动化工程学院, 安徽省合肥市 230009,阳光电源股份有限公司, 安徽省合肥市 230088 |
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| 基金项目： | 国家高技术研究发展计划(863计划)资助项目(2015AA050607) |
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| 摘 要： | 在采用下垂控制的多逆变器微网系统中,针对线路阻抗差异所导致逆变器无功功率不均分问题,提出了基于虚拟电容的无功均分控制策略。该控制策略通过算法模拟逆变器输出端的并联电容特性,并根据线路阻抗差异自适应补偿线路阻抗压降,减小基频环流,提高系统无功均分能力。所提控制策略无需改变下垂特性,且无需检测公共点电压和线路阻抗参数,简化并改进了微网逆变器的无功均分控制。仿真和实验验证了所提方案的有效性。
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| 关 键 词： | 微网(微电网) 逆变器并联系统 功率均分 虚拟电容 下垂控制 无功环流 |
| 收稿时间： | 9/7/2015 12:00:00 AM |
| 修稿时间： | 2016/5/20 0:00:00 |
Reactive Power Sharing Control Strategy for Microgrid Inverters Based on Virtual Capacitor |
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| XU Haizhen,ZHANG Xing,LIU Fang,SHI Rongliang,MAO Fubin and NI Hua.Reactive Power Sharing Control Strategy for Microgrid Inverters Based on Virtual Capacitor[J].Automation of Electric Power Systems,2016,40(19):59-65. |
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| Authors: | XU Haizhen ZHANG Xing LIU Fang SHI Rongliang MAO Fubin and NI Hua |
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| Affiliation: | School of Electrical Engineering and Automation, Hefei University of Technology, Hefei 230009, China,School of Electrical Engineering and Automation, Hefei University of Technology, Hefei 230009, China,School of Electrical Engineering and Automation, Hefei University of Technology, Hefei 230009, China,School of Electrical Engineering and Automation, Hefei University of Technology, Hefei 230009, China,School of Electrical Engineering and Automation, Hefei University of Technology, Hefei 230009, China and Sungrow Power Supply Co. Ltd., Hefei 230088, China |
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| Abstract: | Aiming at reactive power sharing problem due to line impedance voltage mismatch in multi-inverters paralleled microgrid system with conventional droop control method, a power sharing strategy of virtual capacitor is proposed. The method adopts an algorithm to mimic inverter output paralleled capacitor characteristic, and adaptively compensates the line impedance voltage drop to reduce circulating current and improves the power sharing ability. Droop coefficients changes and detection of point of common coupling(PCC)voltage are not needed in the method, which enhances the adaptability of the inverters. Simulation and experimental results verify the effectiveness of the proposed control strategy. This work is supported by National High Technology Research and Development Program of China(863 Program)(No. 2015AA050607). |
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| Keywords: | microgrid inverter paralleled system power sharing virtual capacitor droop control reactive circulating current |
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