极端事件下基于频率响应降阶模型的城市局部电网离网过程紧急频率控制  

Research on Emergency Frequency Control of Urban Local Power Grid Off-grid Process Based on Frequency Response Reduction Model Under Extreme Events

作　　者：武阿涛 许寅 吴翔宇 WU Atao;XU Yin;WU Xiangyu(School of Electrical Engineering,Beijing Jiaotong University,Haidian District,Beijing 100044,China)

机构地区：[1]北京交通大学电气工程学院,北京市海淀区100044

出　　处：《电网技术》2025年第2期427-436,I0001-I0005,共15页Power System Technology

基　　金：国家重点研发计划青年科学家项目(2022YFB2405500)。

摘　　要：极端事件可能导致城市局部电网与上级电网断开进入孤岛,在离网瞬间较大的有功功率缺额使得维持城市局部电网的频率安全成为难点。提出一种极端事件下基于频率响应降阶模型的城市局部电网离网过程紧急频率控制方法。首先,基于平衡截断降阶方法,通过提取频率响应关键特征量,建立了计及分布式资源聚合体的城市局部电网降阶频率响应模型。然后,提出了城市局部电网离网过程紧急频率控制的两阶段决策方法,第1阶段在保证频率不越界的情况下,对快速功率控制资源控制量进行求解,第2阶段依据资源可靠度优先排序对分布式资源聚合体整体功率指令值进行快速分解。最后,基于典型城市局部电网算例验证了所提模型和方法的准确性与有效性。Extreme events may lead to the disconnection of urban local grids from the superior grid,entering an island mode.The significant active power deficit at the moment of disconnection poses a challenge in maintaining the frequency safety of the urban local grid.This paper proposes an emergency frequency control method for the disconnection of urban local grids under extreme events based on a reduced-order frequency response model.Firstly,based on the balanced truncation reduction method,a reduced-order frequency response model of the urban local grid,considering the aggregation of distributed resources,is established by extracting key features of frequency response.Then,a two-stage decision-making method for emergency frequency control during the disconnection process of urban local grids is proposed.The first stage solves the control amount of rapid power control resources to ensure that the frequency does not exceed the limit,and the second stage rapidly decomposes the overall power command value of the distributed resource aggregation based on the priority sorting of resource reliability.Finally,a typical urban local grid case study verifies the accuracy and effectiveness of the proposed model and method.

关 键 词：城市局部电网 频率响应建模 模型降阶 分布式资源聚合体 紧急频率控制 

分 类 号：TM721[电气工程—电力系统及自动化]