| 引用本文: | 董继军,陈 浩,周雪松,等.直流微电网孤岛运行控制策略研究[J].电力系统保护与控制,2020,48(17):115-121.[点击复制] |
| DONG Jijun,CHEN Hao,ZHOU Xuesong,et al.Research on control strategy of a DC microgrid in isolated operation[J].Power System Protection and Control,2020,48(17):115-121[点击复制] |
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| 摘要: |
| 针对湖北黄石地区楼宇建筑直流微电网孤岛运行场景，提出一种光伏和储能电池的协调控制策略。基于直流微电网系统的实时状态，根据直流母线电压数值对微电网的运行模式进行划分，并设置变流器动作阈值，微电网内的各变流器根据母线电压所处的区间范围，执行相应的控制策略，满足微电网的能量平衡及电压稳定性需求。考虑微电网内部储能电池状态的一致性要求，针对电池变流器提出一种基于电池荷电状态(State of Charge, SOC)的协调控制策略，在电池的充放电过程中，根据不同电池组之间的容量差异进行功率分配，避免相同的充放电效率导致过充或过放现象。最后通过Matlab/Simulink对所提控制策略进行仿真验证分析。 |
| 关键词: 直流微电网 孤岛运行 直流母线电压 控制策略 荷电状态 功率分配 |
| DOI：DOI: 10.19783/j.cnki.pspc.191177 |
| 投稿时间：2019-09-26修订日期：2019-11-12 |
| 基金项目:国家自然科学基金项目资助(51877152) |
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| Research on control strategy of a DC microgrid in isolated operation |
| DONG Jijun,CHEN Hao,ZHOU Xuesong,LIU Min,WANG Yinghua,WANG Hairong |
| (1. State Grid Huangshi Electric Power Supply Company, Huangshi 435000, China; 2. Tianjin University of Technology,
Tianjin 300384, China; 3. Tianjin Shouzhong Electric Power Technology Co., Ltd., Tianjin 300384, China) |
| Abstract: |
| A coordinated control strategy of a photovoltaic and energy storage battery is proposed for the isolated island operation scenario of building a DC microgrid in Huangshi, Hubei Province. Based on the real-time state of the DC micro grid system, the operation mode of the micro grid is divided according to the DC bus voltage value, and the action threshold of the converter is set. Each converter in the micro grid executes the corresponding control strategy according to the range of the bus voltage to meet the energy balance and voltage stability requirements of the micro grid. Considering the consistency of the battery state in the microgrid, a coordinated control strategy based on State Of Charge (SOC) is proposed for the battery converter. In the process of battery charging and discharging, the power rate is distributed according to the capacity difference between different battery groups to avoid overcharge or overdischarge caused by the same charging and discharging efficiency. Finally, Matlab/Simulink is used to verify the control strategy proposed in this paper.
This work is supported by National Natural Science Foundation of China (No. 51877152). |
| Key words: DC micro-grid isolated operation DC bus voltage control strategy state of charge power allocation |
