变压器局部放电定位方程组求根公式解算方法

Solution Method of Quadratic Formula about Partial Discharge Positioning Equations of Transformer

局部放电是引起变压器绝缘劣化的关键因素。局部放电定位对于变压器故障诊断和检修策略具有十分重要的意义。文章给出了基于双曲面定位法的变压器局部放电定位基本模型,通过一系列矩阵变换,推导出最终定位结果,给出了基于求根公式的局部放电定位公式,计算方法简单实用。之后,在考虑测量误差的基础上分析了定位误差分布情况,对传感器的合理布置提供了参考性意见。

Partial discharge was the key factor to cause transformer insulation deterioration. The location of partial discharge was of great significance for the transformer fault diagnosis and maintenance strategy. In this paper, the basic model of partial discharge positioning of transformer based on hyperbolic surface positioning method was presented. Through some matrix transform, the final positioning result was deduced, and partial discharge location formula were given based on the calculation method which was simple and practical. After that, the location error distribution was analyzed on the basis of the measurement error, and the reference opinions were provided for the rational arrangement of the sensor.