基于自适应虚拟阻抗的交流微电网无功功率—电压控制策略

发布时间：2018-01-20 13:23

本文关键词： 微电网(微网) 分布式能源自适应虚拟阻抗无功分配电压恢复机制　出处：《电力系统自动化》2017年05期 　论文类型：期刊论文

【摘要】：微电网作为分布式电源的有效载体,是分布式能源合理利用的有效途径。而在微电网中,由于物理线路阻抗不匹配等因素的影响,传统的下垂控制难以合理分配无功功率。为了改善无功分配的精度,提出一种基于自适应虚拟阻抗的微电网无功功率—电压控制策略。该方案在传统的虚拟阻抗基础上叠加自适应项,从而修改电压参考值;同时,通过电压恢复机制来补偿由此造成的输出电压的降低。仿真和实验结果实现了负荷有功和无功功率的合理均分,从而验证了所提控制策略的可行性和有效性。
[Abstract]:As an effective carrier of distributed power generation, microgrid is an effective way to make rational use of distributed energy, but in microgrid, due to physical line impedance mismatch and other factors. In order to improve the accuracy of reactive power distribution, traditional droop control is difficult to reasonably distribute reactive power. A novel reactive power voltage control strategy based on adaptive virtual impedance is proposed, in which the adaptive terms are superimposed on the traditional virtual impedance to modify the voltage reference value. At the same time, the voltage recovery mechanism is used to compensate for the decrease of output voltage. The simulation and experimental results achieve the reasonable equal distribution of active and reactive power. The feasibility and effectiveness of the proposed control strategy are verified.
【作者单位】：广东电网有限责任公司珠海供电局;
【分类号】：TM727;TM761.12
【正文快照】： 0引言分布式电源(DG)的优势显著,可提高风、光等能源的综合利用能力,减少环境污染,应用范围广,对电力系统起到促进和补充作用,近年来受到各界的广泛关注和研究[1-2]。而微电网正是在此背景下,整合了DG的优势,克服其分布式能源稳定性不足的缺点;并利用电力电子装置及其现代化数

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