同塔多回线路感应电压的电路模型与有限元模型的计算及分析  

Calculation and Analysis on Circuit Model and Finite Element Model of Induced Voltage of Multi-circuit Transmission Lines on the Same Tower

作　　者：熊鑫欣 李春亮 江子豪 叶齐政[2] 

机构地区：[1]广东电网有限责任公司揭阳供电局,广东揭阳522000 [2]华中科技大学电气与电子工程学院,湖北武汉430074

出　　处：《广东电力》2017年第4期115-119,共5页Guangdong Electric Power

基　　金：国家自然科学基金资助项目(51577081)

摘　　要：目前计算同塔多回线路感应电压和感应电流值多使用电路等效的方法,即使用ATP-EMTP、PSCAD/EM TDC等软件进行分析,由于这些软件采用的模型都是按传输线理论(二维模型)来分析的,不符合变电站实际状况,计算值与实际测量值相差很大,给接地隔离开关选型带来困难。为此,建立了榕江变电站的三维模型,利用有限元法求取了线路冷备用状态下的静电感应电压值,分析了站内电气设备对线路上感应电压值的影响,并将计算值与实际测量值进行对比,验证了计算方法的准确性。Equivalent circuit method is generally used to calculate induced voltage value and incircuit transmission lines on the same tower at present. Even if using software such as ATP-EMTP and PSCAD/EMTDC for analyzing, the calculated values are greatly different from actual measuring values due to modbased on two-dimension transmission line theory which is not in conformity with it causes difficulties in selecting types for grounding switches. Thus, this paper makesand adopts finite element method to calculate electrostatic induced voltage value in the state of cold liner. I also analyzes influence of electric equipment in the substation on induced voltage value of lines and compares the cai- culated value with actual measuring value. Resut verifies accuracy of this method.

关 键 词：同塔多回线路 电磁场计算 有限元法 ATP-EMTP仿真 

分 类 号：TM75[电气工程—电力系统及自动化] TM15