变压器抗短路能力安全系数动态计算方法研究  

Research on Dynamic Calculation Method of the Security Factor of Transformer Anti-short-circuit Ability

作　　者：邓高峰 李锐 DENG Gaofeng;LI Rui(Guangxi Power Grid Co.,Ltd.,Guangxi Nanning 530023,China;Electric Power Research Institute of Guangxi Power Grid Co.,Guangxi Key Laboratory of Intelligent Control and Operation and Maintenance of Power Equipment,Ltd.,Guangxi Nanning 530023,China;Electric Power Research Institute of Guangxi Power Grid Co.,Ltd.,Guangxi Power Grid Equipment Monitoring and Diagnosis Technology Innovation Center,Guangxi Nanning 530023,China)

机构地区：[1]广西电网有限责任公司,广西南宁530023 [2]广西电网有限责任公司电力科学研究院广西电力装备智能控制与运维重点实验室,广西南宁530023 [3]广西电网有限责任公司电力科学研究院广西电网设备监测及诊断技术创新中心,广西南宁530023

出　　处：《广西电力》2023年第6期74-80,共7页Guangxi Electric Power

摘　　要：变压器是电力系统中的重要设备,其抗短路能力备受关注。为深入研究变压器绕组的抗短路能力,本文首先建立了变压器绕组漏磁场的解析模型,采用镜像法得到变压器的幅向及轴向漏磁场;然后根据绕组的幅向及轴向模型,提出了幅向强度的计算方法及轴向强度的动态计算方法,并提出了变压器抗短路安全系数的动态计算方法;之后对一台110 kV的变压器进行了校核并与静态校核方法进行对比。结果表明,由动态评估方法计算获得的各个计算结果均大于静态计算结果。本文在此研究变压器抗短路安全系数动态计算方法,结合实例校核并验证,可极大预测变压器抗短路能力,为后续提升主变的抗冲击能力提供参考依据。Transformer is an important equipment in power system and its anti-short-circuit ability has received much attention.To study the anti-short-circuit ability of transformer winding,an analytical model for the leakage magnetic field of transformer winding is firstly established in this paper,and the mirror method is used to obtain the amplitude and axial leakage magnetic field of transformer.Then,based on the amplitude and axial model of the winding,a calculation method for amplitude strength and a dynamic calculation method for axial strength and the anti-short-circuit security factor of the transformer are proposed.A 110 kV transformer is verified and compared with the static verification method.The results show that the calculation results obtained by the dynamic evaluation method are greater than the static calculation results.The dynamic calculation method of the anti-short-circuit security factor of transformer is studied in this paper and verified by practical examples,which can greatly predict the anti-short-circuit ability of transformer and provide reference for improving the anti-impact ability of main transformer in the future.

关 键 词：变压器 绕组 短路强度 安全系数 

分 类 号：TM41[电气工程—电器]