多类型资源协调的“双高”送端电网频率紧急控制策略  

Emergency Frequency Control Strategy for Double-high Sending-end Grids With Coordination of Multiple Resources

作　　者：钟祖浩 文云峰 叶希[2] 刘方 郭威 周师晨 ZHONG Zuhao;WEN Yunfeng;YE Xi;LIU Fang;GUO Wei;ZHOU Shichen(College of Electrical and Information Engineering,Hunan University,Changsha 410082,Hunan Province,China;State Grid Sichuan Electric Power Company,Chengdu 610041,Sichuan Province,China;Economic Research Institute of State Grid Sichuan Electric Power Company,Chengdu 610041,Sichuan Province,China)

机构地区：[1]湖南大学电气与信息工程学院,湖南省长沙市410082 [2]国网四川省电力公司,四川省成都市610041 [3]国网四川省电力公司经济技术研究院,四川省成都市610041

出　　处：《电网技术》2024年第9期3801-3811,I0076,I0077,I0078,共14页Power System Technology

基　　金：国家自然科学基金项目(52077066)。

摘　　要：针对大容量直流闭锁下“双高”送端电网调频资源紧缺、稳控切机量大等问题,提出了一种多类型资源协调的频率紧急控制策略。首先,分析直流闭锁后送端电网频率响应过程,整合同步电源、新能源、抽水蓄能、电化学储能、直流调制和稳控切机等事件/响应驱动资源特性,构建了“双高”送端电网频率紧急控制框架和频率响应模型。进而,以直流闭锁后紧急控制代价最低为目标,考虑多元异质资源控制量约束、功率平衡和暂态频率安全约束,建立了多类型资源协调的频率紧急控制模型。最后,基于改进的IEEE RTS-79系统开展了算例测试,仿真结果表明所提模型解算的紧急控制策略能够在满足暂态频率安全要求的同时协调各类资源,且能够有效避免直流闭锁后新能源高频脱网。A frequency emergency control strategy with multiple resource coordination is proposed in response to the scarcity of frequency regulation resources and weakened emergency control capability after a high capacity DC blocking in high shares of renewables and power electronics(double-high)sending-end systems.Firstly,the frequency response of sending-end after DC blocking is analyzed,integrating event and response-driven resources response characteristics such as synchronous generators,renewables,pumped storage,energy storage,DC modulation,security and stability control for generator tripping(SSGT)to construct the frequency emergency control framework and multiple resources coordination for system frequency response(MRCSFR)model.Then,to minimize the emergency control cost after DC blocking,considering the constraints of multiple resources,power balance,and transient frequency safety,an emergency frequency control model with coordinating multiple resources is established.Finally,case studies are conducted using an improved IEEE RTS-79 system.The simulation results show that the emergency control strategy solved by the proposed model can coordinate various resources while meeting transient frequency safety requirements and effectively avoiding renewable tripping after DC blocking.

关 键 词：频率稳定 “双高”电力系统 送端电网 频率紧急控制 新能源脱网 

分 类 号：TM721[电气工程—电力系统及自动化]