摘要
变压器是电力系统的重要设备,在长期运行中会出现绕组松动、变形等故障,影响电力系统的正常工作,因此对变压器绕组健康状态进行评估极为重要。提出利用振动频响法获取变压器绕组的振动频响函数,对比绕组故障状态与健康状态下的振动频响函数,将两者之间的相关系数作为判断变压器绕组故障与否的依据。随后,对比健康状态与4种不同程度松动状态下变压器绕组的振动频响函数,探讨利用相关系数判断变压器绕组松动故障程度的可行性。本研究结果对判断变压器绕组运行故障具有一定的指导意义。
Transformer is an important equipment of power system.Such faults as winding looseness and deformation of winding can occur in the long-term operation and affect the normal operation of power system.Therefore,it is ex-tremely important to assess the health status of the transformer winding.It is proposed to use the vibration frequency response method to obtain the vibration frequency response function of the transformer winding,compare the vibra-tion frequency response function of the winding at fault and healthy condition,and use the correlation coefficient be-tween them as the basis for judging the condition of the transformer winding.Then,the vibration frequency response functions of the transformer winding under the healthy state and under four different degrees of looseness state are compared,and the feasibility of using the correlation coefficient to determine the degree of the transformer winding looseness is discussed.The results of this study have certain guiding significance for judging the fault of of trans-former winding operation.
作者
丁彬
吕亮
刘强
王森
DING Bin;LYU Liang;LIU Qiang;WANG Sen(State Grid Shaanxi Electric Power Research Institution,Xi’an 710100,China;State Key Laboratory of Electrical Insulation and Power Equipment,Xi’an Jiaotong University,Xi’an 710049,China)
出处
《高压电器》
CAS
CSCD
北大核心
2022年第9期203-209,共7页
High Voltage Apparatus
关键词
变压器绕组
松动故障
振动频响函数
相关系数
transformer winding
looseness fault
vibration frequency response function
correlation coefficient
