计及光储接入场景下的柔性互联系统多模式优化运行  

The Multi-Mode Optimization Operation of the Flexible Interconnection System Considering the Photovoltaic and Energy Storage Access Scenarios

作　　者：刘桄志 庞丹 葛津铭 李国庆[1] 王振浩 王尉 LIU Guangzhi;PANG Dan;GE Jinming;LI Guoqing;WANG Zhenhao;WANG Wei(Key Laboratory of Modern Power System Simulation and Control&Renewable Energy Technology of Ministry of Education(Northeast Electric Power University),Jilin 132012,Jilin,China;State Grid Changchun Power Supply Company,Changchun 130021,Jilin,China)

机构地区：[1]现代电力系统仿真控制与绿色电能新技术教育部重点实验室(东北电力大学),吉林吉林132012 [2]国网长春供电公司,吉林长春130021

出　　处：《电网与清洁能源》2024年第6期1-10,共10页Power System and Clean Energy

基　　金：国家电网有限公司科技项目(SGJLCC00KJJS2203595)。

摘　　要：针对分布式光伏出力随机性的问题,该文提出一种柔性互联系统优化运行策略。首先改进虚拟同步控制技术提高直流母线电压稳定性;其次分析系统运行模式判断光伏、储能单元的输出逻辑,以直流母线功率平衡为底层逻辑,充分考虑配电台区负荷均衡度、主变经济运行及故障台区失电量等因素,提出了功率协调优化策略及故障供电恢复策略;并建立多目标优化模型求解得到各端口功率指令,通过精确调控柔性互联多状态开关,实现了柔性互联系统功率灵活互济。最后在Matlab/Simulink中搭建了柔性互联系统仿真模型,验证所提优化调控策略的有效。Focusing on the randomness of distributed photovoltaic power,this paper proposes a flexible interconnection system optimization operation strategy.Firstly,the virtual synchronous control technology is improved to improve the DC bus voltage stability;secondly,the system operation mode is analyzed to judge the output logic of PV and storage units.Taking DC bus power balance as the underlying logic,the paper puts forward the power coordination optimization strategy and fault power supply restoration strategy with full consideration of factors such as the load balance degree of the distribution station area,the economical operation of the main transformer,and the amount of power lost in the faulty station area,etc.The paper also establishes a multi-objective optimization model to obtain the power commands of each port,and achieves the power flexibility mutualization of the flexible interconnected system through accurate regulation of the SNOP.Finally,a simulation model of the flexible interconnection system is built in Matlab/Simulink to verify the effectiveness of the proposed optimization strategy.

关 键 词：柔性互联 负荷均衡 主变经济运行 功率互济 

分 类 号：TM732[电气工程—电力系统及自动化]