考虑一次调频约束和电解铝负荷特性的区域电网最优解列断面研究  

Study on Optimal Disassembly Section of Regional Power Grid Considering Primary Frequency Modulation Constraint and Electrolytic Aluminum Load Characteristics

作　　者：张天成 ZHANG Tiancheng

机构地区：[1]广西百色能源投资发展集团有限公司,广西百色533000

出　　处：《青海电力》2024年第S01期22-28,40,共8页Qinghai Electric Power

摘　　要：断面解列是电网发生严重故障时防止连锁故障和事故扩大的重要措施,合理确定解列点是断面解列控制的核心。为此,提出计及常规机组一次调频性能和电解铝负荷调节特性的区域电网最优解列断面搜索方法。首先,建立火电机组一次调频响应模型和电解铝负荷调节模型,推导出系统频率变化率和频率最低点约束,并加入解列后孤岛连通性约束,以区域电网解列后调节成本最小为目标,构建区域电网最优断面解列搜索模型。最后以某一电解铝负荷占比高的实际电网为算例验证所提出的模型的有效性。Section disassembly is an important measure to prevent chain failures and accidents from expanding when serious faults occur in power grid.Reasonable determination of disassembly points is the core of section disassembly control.For this reason,a search method for optimal disassembly section of regional power grid is proposed,which takes into account the primary frequency modulation performance of conventional units and the load regulation characteristics of electrolytic aluminum.First,the primary frequency modulation response model and the electrolytic aluminum load regulation model of thermal power units are established,the frequency change rate of the system and the lowest frequency constraint are derived,and the island connectivity constraint after the de-alignment is added,and the optimal section de-alignment search model of regional power grid is constructed with the goal of minimizing the adjustment cost after the de-alignment.Finally,an actual power network with a high proportion of electrolytic aluminum load is taken as an example to verify the effectiveness of the proposed model.

关 键 词：电网解列 断面搜索 一次调频特性 电解铝负荷 频率稳定 

分 类 号：TM743[电气工程—电力系统及自动化]