光纤复合架空地线系统分流计算  

Calculation of shunt coefficient of optical fiber composite overhead ground wire system

作　　者：王天一 张欢 邱安楠 詹花茂[2] 王思涵 吕子遇 WANG Tianyi;ZHANG Huan;QIU Annan;ZHAN Huamao;WANG Sihan;LÜZiyu(Beijing Electric Power Economic Technology Research Institute Co.,Ltd.,Beijing 100032,China;Electrical and Electronic Engineering,North China Electric Power University,Beijing 102206,China)

机构地区：[1]北京电力经济技术研究院有限公司,北京100032 [2]华北电力大学电气与电子工程学院,北京102206

出　　处：《武汉大学学报（工学版）》2022年第7期716-724,共9页Engineering Journal of Wuhan University

摘　　要：正确计算架空地线分流系数对光纤复合架空地线(optical fiber composite overhead ground wire,OPGW)的热稳定校验和选型具有重要意义。建立了地线逐塔接地的输电线路网络模型,并将模型推广到存在地线绝缘的其他运行方式,采用节点法求解地线分流系数。以北京电网某220 kV线路为例,将该方法计算结果与电磁暂态程序ATP/EMTP的仿真结果进行对比,结果验证了该算法的正确性。基于该方法开发了计算软件,计算了OPGW与普通地线结合、普通地线分段绝缘且单点接地运行方式下的分流系数,并计算了地线分段绝缘情况下的绝缘间隙电压,可为绝缘间隙的整定提供参考。It is very important to calculate the shunt coefficient correctly for the thermal stability check and selection of optical fiber composite overhead ground wire(OPGW).In this paper,a transmission line network model based on ground line grounding tower by tower is established,and the model is extended to other operating modes with ground line insulation,and the shunt coefficient of ground wire is calculated by node method.Taking a 220 kV circuit of Beijing Power Grid as an example,the calculation results of this method are compared with the simulation results of ATP/EMTP to verify the correctness of the algorithm.Based on this method,the software is developed to calculate the shunt coefficient of OPGW combined with common ground wire,and the common ground wire is sectionally-insulated and single-point grounded;and the insulation gap voltage under the condition of sectionally-insulated ground wire is calculated,which can provide reference for the setting of insulation gap.

关 键 词：分流系数 光纤复合架空地线 单相接地故障 节点法 地线运行方式 

分 类 号：TM713[电气工程—电力系统及自动化]