复杂大电网非预设性运行工况下的继电保护动作适应性仿真分析  

Simulation Analysis of Relay Protection Action Adaptability under Non-preset Operating Conditions of Complex Large Power Grid

作　　者：陈朝晖[1] 丁晓兵[1] 薛明军[2,3] 张灏 杨黎明[2,3] CHEN Zhaohui;DING Xiaobing;XUE Mingjun;ZHANG Hao;YANG Liming(Power Dispatching and Control Center of China Southern Power Grid,Guangzhou 510663,China;Guodian Nanjing Automation Co.,Ltd.,Nanjing 211100,China;Nanjing SAC Power Grid Automation Co.,Ltd.,Nanjing 211153,China)

机构地区：[1]中国南方电网电力调度控制中心,广东广州510663 [2]国电南京自动化股份有限公司,江苏南京211100 [3]南京国电南自电网自动化有限公司,江苏南京211153

出　　处：《微型电脑应用》2024年第9期222-225,共4页Microcomputer Applications

摘　　要：非预设性运行工况下的突发事件多,导致继电保护逻辑的适应性较差,不合理区域较多,为此,进行复杂大电网非预设性运行工况下继电保护动作适应性仿真分析。分析历史常规故障,标记故障点最常发生位置,构建零序、负序方向元件模型、距离元件模型、纵联电流差动元件模型,观察复杂大电网非预设性运行工况下的电网参数变化情况,第一时间掌握电网的耦合性,不断选择电网所需的继电保护动作逻辑,确认继电保护动作适应性。仿真实验表明,将故障点设置在保护区域内和区域外,继电保护动作能够根据故障选择不同保护模型进行故障母线切除或者保护不动作,适应性好。There are many emergencies under non-preset operating conditions,resulting in poor adaptability of relay protection logic and more unreasonable areas,therefore,simulation analysis of relay protection action adaptability under non-preset operating conditions of complex large power grid is carried out.This paper analyzes historical conventional faults,mark the most common location of fault points,builds zero sequence and negative sequence directional element models,distance element models and longitudinal current differential element models,observes the changes of power grid parameters under non-preset operating conditions of complex large power grid,master the coupling of power grid at the first time,constantly select the relay protection action logic required by power grid,and confirm the adaptability of relay protection action.Simulation experiments show that if the fault point is set in and out of the protection area,the relay protection action can select different protection models according to the fault to cut the fault bus or protection no action,which has good adaptability.

关 键 词：复杂大电网 非预设性运行工况 故障预测 元件模型构建 继电保护 

分 类 号：TM732[电气工程—电力系统及自动化]