考虑自适应虚拟阻抗的微电网分布式功率控制策略

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考虑自适应虚拟阻抗的微电网分布式功率控制策略

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- 考虑自适应虚拟阻抗的微电网分布式功率控制策略
- Automation of Electric Power Systems Vol. 40, Issue 19, Pages: 23-29(2016)
- 作者机构：
  
  浙江大学电气工程学院,浙江省,杭州市,310027
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2016
- 稿件说明：
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GUO Qian. [J]. Automation of electric power systems, 2016, 40(19): 23-29.
DOI：

GUO Qian. [J]. Automation of electric power systems, 2016, 40(19): 23-29. DOI：

摘要

针对低压微电网中

采用传统有功功率—电压幅值下垂控制的分布式电源在阻抗不匹配时难以按照下垂系数合理分配负荷有功功率的问题

提出了一种基于自适应虚拟阻抗的分布式功率控制策略

有效补偿了不匹配的馈线阻抗引起的电压降差异

实现了负荷功率的合理分配。所提策略基于多智能体一致性理论

构建了分布式的控制结构

各分布式电源仅需使用本地和相邻电源的功率信息对虚拟阻抗的模进行自适应调节

避免了对全局信息的依赖。通信网络拓扑中包含生成树的系统需求易于通过稀疏网络实现。同时

根据输出功率因数调节虚拟阻抗的阻抗角

增强了系统的鲁棒性。仿真结果证明了所提策略的有效性和可行性。

Abstract

In low-voltage microgrids

distributed generators(DGs)with conventional active power-voltage magnitude droop controller cannot share active power in inverse proportion to their droop coefficients in the presence of impedance mismatch. A distributed power control strategy based on adaptive virtual impedance is proposed to solve this problem. The strategy effectively compensates the difference of the voltage drops caused by mismatched feeders

hence accurate power sharing can be realized. Based on consensus of multi-agent systems

the strategy utilizes a distributed control structure. Each DG unit only employs local and neighboring power information to adjust the adaptive virtual impedance

avoiding the requirement for system global information. The system requirement that the communication topology includes a spanning tree can be satisfied with a sparse communication network. Meanwhile

the impedance phase is adjusted according to the power factor angle

which improves system robustness. Simulation results validate the effectiveness and feasibility of the proposed strategy. This work is supported by National Natural Science Foundation of China(No. 51177149)and Specialized Research Fund for the Doctoral Program of Higher Education(SRFDP)of China(No. 20130101110108).

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