交直流混合微电网多模式功率协调控制策略  

Multi-mode Power Coordination Control Strategy for AC/DC Hybrid Microgrid

作　　者：杨向真[1,2] 李玉宁 杜燕 施永[1,2] YANG Xiangzhen;LI Yuning;DU Yan;SHI Yong(School of Electrical and Automation Engineering,Hefei University of Technology,Hefei 230009,China;Engineering Research Center of Photovoltaic System Ministry of Education,Hefei 230009,China)

机构地区：[1]合肥工业大学电气与自动化工程学院,合肥230009 [2]光伏系统教育部工程研究中心,合肥230009

出　　处：《高电压技术》2021年第4期1262-1273,共12页High Voltage Engineering

基　　金：国家自然科学基金(51907045);安徽省自然科学基金(1908085QE238)。

摘　　要：为了解决交直流混合微电网中储能单元荷电状态(state of charge,SOC)变化导致的子网互济能力变化和系统供电可靠性问题,提出一种综合考虑子网运行状态和储能SOC变化的交直流混合微电网多模式功率协调控制策略,将系统的运行模式划分为盈余互济、缺损互济、独立运行和功率共享4种情况,详细研究了在不同运行模式下网间互济功率的传输原则和计算方法,从而实现系统源荷功率平衡和网间SOC均衡,达到了提高交直流混合微电网的可靠性和储能利用效率的目的。最后,在Matlab/Simulink仿真平台上搭建仿真模型并验证了所提多模式控制策略有效性。In order to solve the problem of mutually-supplied capacity variation between sub-microgrids and the reliability of power supply affected by the state of charge(SOC) of energy storage units in AC/DC hybrid microgrid, a multi-mode coordinated power control strategy is proposed considering both of the operation states and the SOC of sub-microgrids. The operation mode is divided into 4 states, namely, surplus mutual operation, defective mutual operation, independent operation, and power sharing operation, according to the proposed strategy. The principles of power transfer and the calculation of power references are researched in detail for four kinds of different operation states. Therefore, both the power balance of system and the relatively equilibrium of SOC in sub-microgrids are realized to improve the reliability of power supply and utilization efficiency of energy storage units in AC/DC hybrid microgrid. Finally, a simulation model is established by Matlab/Simulink to verify the effectiveness of proposed control strategy.

关 键 词：交直流混合微电网 协调控制 互联变换器 模式划分 荷电状态 

分 类 号：TM721.3[电气工程—电力系统及自动化]