摘要
在异步分区模式下,直流频率限制器(frequency limit control,FLC)对高比例新能源送端电网的频率安全具有重要支撑作用。为合理安排送端电网的直流和机组运行计划,保障直流频率限制器的频率支撑作用,从异步互联送端电网日前调度角度提出改进措施。通过分析直流频率限制器的频率支撑机理,建立了包括系统惯量约束、最大频率偏差约束和一次调频备用约束的送端电网频率安全约束,并通过分段线性化方法消除非线性特征。以系统运行成本最小为目标,综合考虑送端电网消纳可再生能源和改善受端电网调峰需求,构建了考虑直流频率支撑的异步互联送端电网日前调度模型,并基于改进IEEE RTS 24节点系统进行算例分析。算例结果表明,所提日前调度模型在改善系统运行经济性的同时能够有效保障系统的频率安全。
In asynchronous partitioning mode,frequency limit control(FLC)plays an important supporting role in the frequency stability of the high proportion of renewable energy sending end power grid.To reasonably arrange the HVDC and unit operation plan of the sending-end power grid and ensure the frequency support function of the FLC,this paper proposes improvement measures from the perspective of the day-ahead dispatch of the asynchronous interconnection sending-end power grid.By analyzing the frequency support mechanism of the FLC,a frequency constraint for the sending end power grid was established,including system inertia constraint,maximum frequency deviation constraints,and primary frequency regulation backup constraints.Nonlinear features were eliminated through the segmented linearization method.Taking the minimum system operation cost as the goal,considering the renewable energy consumption of the sending end power grid and improving the peak shaving of the receiving end power grid,a day ahead dispatch model of asynchronous interconnection sending end power grid considering HVDC frequency support is constructed,and a case is analyzed based on the improved IEEE RTS 24 node system.The case results show that the proposed day-ahead dispatch model can effectively guarantee the system's frequency security while improving its operating economy.
作者
莫明山
娄素华
陈亦平
楼楠
毛文俊
严国灿
刘育成
张文睿
MO Mingshan;LOU Suhua;CHEN Yiping;LOU Nan;MAO Wenjun;YAN Guocan;LIU Yucheng;ZHANG Wenrui(State Key Laboratory of Advanced Electromagnetic Engineering and Technology(Huazhong University of Science and Technology),Wuhan 430074,Hubei Province,China;Power Dispatch and Control Center of China Southern Power Grid,Guangzhou 510623,Guangdong Province,China;College of Electrical Engineering,Zhejiang University,Hangzhou 310027,Zhejiang Province,China;School of Electric Power,South China University of Technology,Guangzhou 510641,Guangdong Province,China)
出处
《电网技术》
北大核心
2025年第12期5196-5205,I0071-I0074,共14页
Power System Technology
基金
国家重点研发计划项目(2022YFB2403000)。
关键词
异步互联电网
频率安全
直流频率限制器
日前调度
asynchronous interconnected power grid
frequency security
FLC
day ahead dispatch
