开关试验对电力系统的影响和仿真  

Influence and Simulation of Switching Test on Power System

作　　者：吕红峰 吕梦琦 李竹田 郭鹏 Lv Hong-feng;Lv Meng-qi;Li Zhu-tian;Guo Peng

机构地区：[1]国网浙江省电力有限公司培训中心,浙江杭州311600 [2]中国电信股份有限公司浦江分公司,浙江浦江322200

出　　处：《电力系统装备》2023年第2期62-64,共3页Electric Power System Equipment

摘　　要：基于某互联网开关试验站设计试验能力,通过电力系统全数字防震装置,混合时域仿真不同的试验项目,对开关网络影响电力系统机制展开分析。结果发现,试验项目会导致电力系统110 kV的母线电压下降至母线额定电压值的15%,会在很大程度上影响到邻近工业电动机,所以有必要禁止该试验项目。开关试验项目通常不会导致周边电力系统主变保护、母线保护以及线路保护出现保护动作,然而,会导致母线负序电压为220 kV的接入变电站比定值大,而且失灵与母线保护电压元件都会被开放,直接影响电力系统平稳运行。Based on the design and experiment capability of an Internet switch test station,the research analyzed the mechanism of switching network affecting the power system through the hybrid time domain simulation of different test items of the power system’s all digital shock proof device.The results showed that the test items would cause the 110 kV bus voltage of the power system to drop to 15%of the bus rated voltage,which would greatly affect the adjacent industrial motors,Therefore,it is necessary to prohibit this test item.The switch test items usually do not lead to the protection action of the main transformer protection,bus protection and line protection of the surrounding power system.However,it will lead to the access substation with a bus negative sequence voltage of 220 kV being greater than the fixed value,and the failure and bus protection voltage components will be opened,which will directly affect the smooth operation of the power system.

关 键 词：开关试验 电力系统 结构设计 仿真计算 

分 类 号：TM743[电气工程—电力系统及自动化]