高压电器Issue(12)：59-65,7.DOI:10.13296/j.1001-1609.hva.2015.12.011
基于振动的电力变压器铁心松动故障诊断研究
Fault Diagnosis of Transformer Core Loosing Based on Vibration
摘要
Abstract
When a core loosing fault of power transformer occurs, the fundamental frequency component (100 Hz) in its vibration signal will change, but the fundamental frequency component cannot be used for accurate diagnosis of the fault because many factors influence the component. It is known that the new characteristic frequencies of the 50 Hz frequency component and some of its harmonic components,as well as the harmonic components of the fundamental frequency, can also reflect the fault of transformer core loosing.In this study, a fault diagnosis method of transformer core loosing was proposed based on the relationship among the characteristic frequencies. This method can diagnose whether a fault exists in transformer core, and determine the fault type.In order to verify the proposed method, a deformation fault was set to the actual transformer core. The vibration signals were sampled from the monitoring points, and de-noising and conversion processing was performed to diagnose the fault with the proposed method. The diagnosis result is the same with the actual fault, indicating that the proposed diagnostic method is accurate and feasible. Fault diagnosis system of power transformer based on vibration has been developed by using the proposed diagnosis method and applied to the actual substation.关键词
振动法/电力变压器/铁心松动/故障诊断/诊断装置Key words
vibration method/power transformer/core loose/fault diagnosis/diagnostic system引用本文复制引用
王春宁,耿志慧,马宏忠,金基平,李凯..基于振动的电力变压器铁心松动故障诊断研究[J].高压电器,2015,(12):59-65,7.基金项目
国家电网公司重点科技项目(2011-0810-2251)；国家自然科学基金资助项目(51177039)。Project Supported by Science and Technology Projects of the State Grid Corporation(2011-0810-2251)， National Natural Science Foundation of China(51177039) （2011-0810-2251）
