基于光储联合系统的电网分段恢复策略  

Segmentation restoration strategy of power grid based on combined optical storage system

作　　者：张英敏[1] 张婉欣 李保宏[1] 黑玉鹏 王腾鑫 张敏 ZHANG Yingmin;ZHANG Wanxin;LI Baohong;HEI Yupeng;WANG Tengxin;ZHANG Min(College of Electrical Engineering,Sichuan University,Chengdu 610065,China;State Grid Shanxi Electric Power Company Research Institute,Taiyuan 030002,China)

机构地区：[1]四川大学电气工程学院,四川成都610065 [2]国网山西省电力公司电力科学研究院,山西太原030002

出　　处：《电力工程技术》2024年第4期26-35,共10页Electric Power Engineering Technology

基　　金：四川省自然科学基金资助项目(2022NSFSC0262);国家电网有限公司总部科技项目(5100-202199274A-0-0-00)。

摘　　要：当前新能源大量引入至电力系统,为了使其代替传统的水电、燃气机组作为黑启动电源,文中研究了基于光储联合系统的电网分段恢复策略。首先,根据光储系统的结构和控制方式,提出由储能系统建立稳定的并网母线线电压,光伏系统分步并网的启动方式;其次,为了增强光伏发电系统的惯性阻尼支撑,提出在光伏系统逆变器侧加入虚拟同步控制;最后,在待启动机组和系统负荷并网过程中,利用储能系统配置附加阻尼控制器抑制电网黑启动产生的次同步振荡,保证电网稳定恢复。在PSCAD/EMTDC中搭建光储联合系统黑启动的电磁暂态仿真模型并进行分析,结果表明系统恢复过程中母线线电压偏差不超过0.65%、系统频率偏差不超过1%,满足黑启动要求,验证了文中所提启动策略的可行性。At present,new energy is introduced into the power system in large quantities.In order to make it replace the traditional hydropower and gas units as the black start power supply,segmentation restoration strategy of power grid based on the combined optical storage system is studied.Firstly,according to the structure and control mode of the optical storage system,the energy storage system establishes a stable grid-connected bus voltage is proposed,and the photovoltaic system is connected to the grid step by step.Secondly,in order to enhance the damping inertial support of photovoltaic power generation system,virtual synchronous control is proposed to be added to the inverter side of photovoltaic system.Finally,in the process of grid connection between the units to be started and the system load,the energy storage system is configured with additional damping controller to suppress the sub-synchronous oscillation generated by the grid black start,so as to ensure the stable recovery of the grid.In PSCAD/EMTDC,the electromagnetic transient simulation model of black start of the combined optical storage system is built and the simulation analysis is carried out.The results show that the busbar voltage deviation and system frequency deviation in the recovery process of the system are less than 0.65%and less than 1%,which meets the requirements of black start and verifies the feasibility of the start-up strategy proposed in the paper.

关 键 词：光伏系统 储能系统 黑启动 分段恢复 虚拟同步控制 附加阻尼控制器 

分 类 号：TM72[电气工程—电力系统及自动化]