摘要
针对现有理论解释在定量分析主变套管介损异常案例时存在的不足,提出了一种新的基于气隙放电的等效模型,经仿真验证,该模型能够合理解释套管介损增大而电容量几乎不变的现象。通过改变模型参数,指出测试结果仅取决于气隙放电起始电压与放电熄灭电压的组合,且放电起始电压越高,套管的介损值与电容量相对于正常情况下的变化越明显。
A new equivalent model based on air-gap discharge is proposed,as the existing explanations have difficulties to make quantitative analysis of one typical transformer bushing fault. It is verified by simulation that the model can reasonably explain the phenomenon that the dielectric loss increases while the capacitance is almost invariable. By changing the model parameters, it is pointed out that the test results only depend on the combination of the discharge inception voltage and extinction voltage, and the higher inception voltage, the more obvious the changes of the dielectric loss and the capacitance.
出处
《科技创新导报》
2018年第18期31-34,36,共5页
Science and Technology Innovation Herald
