高压GIS壳体环流及损耗计算模型研究  

Circulation and loss calculation model of high voltage GIS shell

作　　者：赵义松 宋成伟 邢凯 刘馨然 王飞鸣 郎福成 ZHAO Yisong;SONG Chengwei;XING Kai;LIU Xinran;WANG Feiming;LANG Fucheng(State Grid Liaoning Electric Power Co.,Ltd.Research Institute,Shenyang 110006,China;Testing and Certification Center of Liaoning Provincial Inspection,Shenyang 110006,China;Shenyang Power Supply Company of State Grid Liaoning Electric Power Co.,Ltd.,Shenyang 110006,China;State Grid Liaoning Electric Power Co.,Ltd.Marketing Service Center,Shenyang 110006,China)

机构地区：[1]国网辽宁省电力有限公司电力科学研究院,辽宁沈阳110006 [2]辽宁省检验检测认证中心,辽宁沈阳110006 [3]国网辽宁省电力有限公司沈阳供电公司,辽宁沈阳110006 [4]国网辽宁省电力有限公司营销服务中心,辽宁沈阳110006

出　　处：《电力工程技术》2021年第1期201-207,共7页Electric Power Engineering Technology

摘　　要：高压气体绝缘全封闭组合电器(GIS)壳体环流会产生很大的环流损耗,引起设备发热,长期运行将直接影响系统的输送容量和设备绝缘性能。文中为提高GIS壳体环流计算精度,简化计算程序,提高工程设计人员及现场运维人员使用效率,应用大电流母线和工程电磁场基础理论,提出空心电流互感器原理,建立GIS壳体环流等效模型。针对550 kV GIS稳态运行及短路故障工况,对不同位置壳体、短接线、接地线环流进行等效计算,给出环流及损耗分布规律。计算结果表明:550 kV GIS稳态运行时,位于进、出线端的短接线环流值大于其他位置;故障状态下故障点就近接地线上电流值最大;接地线和短接线计算电流大于实测值,主要为接地电阻分布引起。通过计算可给出GIS系统损耗总量,为GIS实际运行提供理论指导。High-voltage gas insulate switchgear(GIS)shell circulation is the main cause of operating losses in substations.Circulation can cause the device to heat up.If the substation is operated for a long time,the transmission capacity of the power system and the insulation performance of the equipment will be seriously affected.The purpose of this article is to simplify the loss calculation procedure and improve the calculation accuracy of GIS shell circulation and the efficiency of engineering designers and on-site operation and maintenance.The basic theory of high current bus and engineering electromagnetic field is applied.Based on the principle of hollow current transformers,an equivalent model of GIS shell circulation is established.For steady-state operation of 550 kV GIS and short-circuit fault conditions,circulating currents of shells,short wiring,and grounding wires at different locations are calculated.The circulation and loss distribution rules are given.The calculation results show that when the 550 kV GIS is in steady-state operation,the short-circuit circulating current value at the inlet and outlet ends is greater than other locations;the current value at the fault point near the ground wire is the largest in the fault state;the calculated current of the ground wire and the short wire is greater than the measured value,mainly it is caused by the distribution of grounding resistance.The total loss of GIS system is given through calculation,which gives theoretical guidance for the actual operation of GIS.

关 键 词：全封闭组合电器(GIS) 等效计算模型 壳体环流 运行损耗 运维反措 

分 类 号：TM85[电气工程—高电压与绝缘技术]