配网不停电作业旁路变压器并联运行特性及方案研究  

Study on parallel operation characteristics and schemes of bypass transformer for live working in distribution network

作　　者：刘金 邹江华 任兴忠 石妤 祖圣宣 LIU Jin;ZOU Jianghua;REN Xingzhong;SHI Yu;ZU Shengxuan(Zunyi Power Supply Bureau of Guizhou Power Grid Co.,Ltd.,Zunyi 563000,China;School of Electrical Engineering and Automation,Wuhan University,Wuhan 430072,China)

机构地区：[1]贵州电网有限责任公司遵义供电局,贵州遵义563000 [2]武汉大学电气与自动化学院,湖北武汉430072

出　　处：《武汉大学学报(工学版)》2025年第1期103-110,共8页Engineering Journal of Wuhan University

基　　金：贵州电网有限责任公司遵义供电局科技项目(编号:060300KK52210002)。

摘　　要：配网不停电作业已成为保障电力系统安全、可靠、稳定运行的重要检修手段。在旁路变压器与待检修变压器短时并联过程中可能出现损害作业设备的环流,为解决此类工程问题,对旁路变压器并联运行的稳态过程进行理论分析,并在电磁暂态仿真软件中搭建10 kV配电网变压器并联模型。仿真结果表明,影响并联运行变压器是否产生环流的主要因素是变压器联结组别与变比差异,变压器容量及短路阻抗百分比为次要因素。进一步给出了保证变压器稳态运行的并联方案,为不停电作业旁路变压器的参数选型提供了理论基础。Uninterrupted operation of distribution network has become an important maintenance method to ensure the safe,reliable and stable operation of power system.In the short-term parallel connection between the bypass transformer and the transformer to be repaired,there may be a circulating current that damages the operating equipment.In order to solve such engineering problems,this paper makes a theoretical analysis of the steady-state process in parallel operation of the bypass transformer,and the parallel model of 1o kV distribution network transformers is built in the electromagnetic transient simulation software.The simulation results show that the main factors affecting the parallel operation transformer circulating current are the differences of transformer connection group and transformation ratio,and the transformer capacity and the percentage of short-circuit impedance are the secondary factors.Furthermore,the parallel scheme to ensure the steady-state operation of the transformer is given,which provides a theoretical basis for the parameter selection of the bypass transformer in non-outage operation.

关 键 词：配电网络 不停电作业 旁路变压器 并联运行 环流 

分 类 号：TM75[电气工程—电力系统及自动化]