配电变压器短路承受能力校核计算预诊断评估  

Calibration Calculation and Pre-Diagnosis Evaluation of Distribution Transformer Short-Circuit Withstand Capability

作　　者：何东升 马桂芬 罗海凹 林志力 苗本健 许呈盛 HE Dongsheng;MA Guifen;LUO Haiao;LIN Zhili;MIAO Benjian;XU Chengsheng(China National Quality Supervision and Testing Center for Mid-Low Voltage Transmission and Distribution Equipment,Dongguan 523325,China;South China University of Technology,Guangzhou 510640,China;Guangdong University of Technology,Guangzhou 510006,China)

机构地区：[1]国家智能电网输配电设备质量监督检验中心,广东东莞523325 [2]华南理工大学,广东广州510640 [3]广东工业大学,广东广州510006

出　　处：《电器与能效管理技术》2019年第11期46-51,76,共7页Electrical & Energy Management Technology

基　　金：国家质量监督检验检疫总局科技计划项目(2016QK026)

摘　　要：配电变压器短路承受能力试验具有测试周期长、费用高、破坏性强、合格率低,且无法通过仿真计算验证其可靠性的特点,已成为制约变压器行业工程化、产业化发展的瓶颈。首先介绍了变压器短路试验基本现状,提出了配电变压器短路承受能力校核计算和预诊断评估方法,从线圈轴向力、内线圈导线辐向应力、外线圈导线辐向应力、压板应力和热稳定性5个方面计算验证其符合性。接着结合实际案例验证了校核计算的有效性,实现了对配变抗短路能力水平的精准预诊断。因此,精确预诊断具有重要的理论指导意义和工程应用价值。The short-circuit withstand capability test of distribution transformer has the characteristics of long test period,high cost,strong destructiveness,low qualification rate,and can not be verified by simulation or calculation.It has become the bottleneck restricting the engineering and industrialization development of transformer industry.This paper introduced the basic status of transformer short-circuit test,and proposed the calculation and pre-diagnosis evaluation method for short-circuit bearing capacity of distribution transformers.From five aspects of coil axial force,inner coil wire radial stress,outer coil wire radial stress,platen stress and thermal stability,it was calculated to verify the compliance.At the same time,this paper validated the effectiveness of the calculation with an actual case,realized the accurate pre-diagnosis of the resistance to short-circuit capability,while has important theoretical guiding significance and engineering application value.

关 键 词：配电变压器 短路承受能力 校核计算 预诊断 

分 类 号：TM421[电气工程—电器]