| 引用本文: | 李怡,李永丽,李松,邵泽广,陈晓龙.基于VSG的光伏及混合储能系统功率分配与虚拟惯性控制[J].电力自动化设备,2023,43(7): |
| LI Yi,LI Yongli,LI Song,SHAO Zeguang,CHEN Xiaolong.Power distribution and virtual inertia control of photovoltaic and hybrid energy storage system based on VSG[J].Electric Power Automation Equipment,2023,43(7): |
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| 摘要: |
| 在基于虚拟同步发电机(VSG)控制的光伏及混合储能系统中，不同类型的储能之间存在协调配合问题，其荷电状态(SOC)也与VSG的控制策略密切相关。针对该问题，提出了一种基于VSG的光伏及混合储能系统的协调控制策略。在逆变器直流侧引入混合储能系统，并基于VSG控制原理对其进行功率分配。根据储能SOC与VSG虚拟惯性之间的定量关系，设计了一种改进的虚拟惯性自适应控制策略，并给出相关参数的选取原则，在改善系统输出频率和功率动态响应的同时，对储能SOC进行控制。基于MATLAB/Simulink进行仿真，结果表明所提控制策略可以有效改善系统电压和频率的稳定性，实现混合储能之间功率的合理分配，提高储能的充放电性能并延长其寿命。 |
| 关键词: 虚拟同步发电机 混合储能系统 光伏 功率分配 虚拟惯性 自适应控制 |
| DOI：10.16081/j.epae.202212003 |
| 分类号:TM615;TM712 |
| 基金项目:国家电网有限公司总部科技项目(SGHE0000DKJS1900093) |
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| Power distribution and virtual inertia control of photovoltaic and hybrid energy storage system based on VSG |
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LI Yi, LI Yongli, LI Song, SHAO Zeguang, CHEN Xiaolong
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Key Laboratory of Smart Grid of Ministry of Education, Tianjin University, Tianjin 300072, China
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| Abstract: |
| In the virtual synchronous generator(VSG) control-based photovoltaic and hybrid energy storage systems, there are coordination problems among different types of energy storage, and their state of charge(SOC) is also closely related to the control strategy of VSG. To solve this problem, a coordinated control strategy of photovoltaic and hybrid energy storage system based on VSG is proposed. A hybrid energy storage system is integrated into the DC side of the inverter and its power is distributed based on the control principle of VSG. According to the quantitative relationship between the energy storage SOC and the VSG virtual inertia, an improved virtual inertia self-adaptive control strategy is designed and the selection principles of relevant parameters are given. The energy storage SOC can be controlled while improving the dynamic response of the system output frequency and power. MATLAB/Simulink simulative results show that the proposed control strategy can effectively improve the stability of system voltage and frequency, achieve the rational power distribution among hybrid energy storage, improve the charging and discharging performance of energy storage and extend its life. |
| Key words: virtual synchronous generator hybrid energy storage system photovoltaic power distribution virtual inertia self-adaptive control |
