油浸式电力变压器绝缘状况的回复电压法研究

Study on the method of voltage recovery insulation condition of oil immersed power transformer

油浸式电力变压器是电力系统中重要的电气设备,其运行状况的好坏会直接影响到大电网的安全运行,对其绝缘状况进行研究具有重要意义。搭建油纸绝缘系统扩展的Debye仿真模型,得出充电电压、充放电时间比和绝缘电阻等参数的变化对回复电压参数的影响关系图;对不同糠醛含量值进行测试,得出其对回复电压各参数的对应关系。糠醛实验研究和回复电压参数的仿真分析的结合,对比回复电压法参数的变化情况,进一步验证回复电压方法的可靠性,为今后对变压器的整体绝缘状态的诊断提供依据。

The oil immersed power transformer is a important equipment in power system,its running state can directly affects the reliable operation of large power grid,conducts the research to the insulation condition has important significance.Through the expansion Debye simulation model in oil paper insulation system was built,the diagram between the charging voltage.the ratio time of charging to discharging,insulation resistance and the recovery voltage parameters were got.By testing on the different content value of furfural,can get the relation to the recovery voltage method.The combination of the study to furfural and the analysis to the recovery voltage parameters,compare with the change of recovery voltage parameters,can further text the reliability of the recovery voltage method,provide the basis for the diagnosis of transformer insulation condition in the future.