张金星, 于艾清, 黄敏丽. 基于自适应下垂控制的直流微电网群分层协调控制[J]. 现代电力, 2018, 35(4): 72-79.
引用本文: 张金星, 于艾清, 黄敏丽. 基于自适应下垂控制的直流微电网群分层协调控制[J]. 现代电力, 2018, 35(4): 72-79.
ZHANG Jinxing, YU Aiqing, HUANG Minli. Hierarchical Coordinate Control for DC Microgrid Clusters Based on Adaptive Droop Control[J]. Modern Electric Power, 2018, 35(4): 72-79.
Citation: ZHANG Jinxing, YU Aiqing, HUANG Minli. Hierarchical Coordinate Control for DC Microgrid Clusters Based on Adaptive Droop Control[J]. Modern Electric Power, 2018, 35(4): 72-79.

基于自适应下垂控制的直流微电网群分层协调控制

Hierarchical Coordinate Control for DC Microgrid Clusters Based on Adaptive Droop Control

  • 摘要: 为了确保配网故障时直流微电网群的稳定运行,本文根据子微网的运行工况,将微网划分不同的运行模式,提出一种基于储能自适应下垂控制的协调控制策略来确保母线电压稳定。该策略通过微网中央控制器实时检测公共直流母线电压波动控制各子微网间并联或独立运行,从而来维持各子微网直流母线电压稳定。同时,采用自适应下垂控制协调并联运行的子微网中储能单元根据各自荷电状态和最大输出能力自动分配负荷功率。利用MATLAB/Simulink搭建直流微电网群仿真模型,仿真结果表明该策略可协调直流微电网群母线电压稳定并可自动分配不同储能单元之间的负荷功率。

     

    Abstract: According to the different operating conditions of each sub-microgrid, different operation modes of microgrid are classified to guarantee stability operation of DC microgrid clusters when failure occurred in distribution network, and a coordinate control strategy for DC microgrid cluster is proposed based on adaptive droop control of energy storage. The grid connection or disconnection operation of multi-microgrid is controlled by voltage fluctuation of DC bus that is monitored real-time through microgrid central controller to maintain voltage stability of DC bus for each sub-microgrid. At the same time, the load power may be dynamically shared according to the state of charge (SOC) and maximum output power by using adaptive droop control to regulate parallel running energy storage units in sub-microgrid. Multi-microgrids simulation model is constructed on MATLAB/Simulink platform, and simulation results show that the proposed control strategy can improve the system stability and load power can be dynamically shared among energy storage units.

     

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