基于等效电路和温度场模型的10 kV干式铁芯串联电抗器故障的影响因素分析

在电力系统中，串联电抗器常用于限制电网中的短路电流和高次谐波。然而，由于绝缘老化、电压波动、谐波以及外界环境等因素的影响，电抗器会在运行中产生缺陷，严重时会引起烧毁甚至爆炸等事故。其中谐波与温升是引起电抗器绝缘缺陷的重要因素。为提供一种谐波以及温升对10 kV干式铁芯串联电抗器故障的影响的分析思路以便于其运行维护，以一台型号为CKSC-300/10-5的串联电抗器为例，通过建立其等效电路和温度场模型，分析并研究了两种因素对该电抗器烧毁故障的作用效果。结果表明：在选取合适的电抗率下，谐波并不是造成此电抗器烧毁故障的最直接的因素；经过温度场仿真分析，温升也不是造成此电抗器烧毁的直接因素之一，仍需要进一步考虑其它故障原因的影响。

Analysis of Influencing Factors of 10 kV Dry Type Iron Core Series Reactor Fault Based on Equivalent Circuit and Temperature Field Model

In power system, series reactor is often used to limit short-circuit current and high-order harmonics in power grid. However, due to the influence of insulation aging, voltage fluctuation, harmonic and external environment, the reactor will produce defects in operation, and even cause accidents such as burning or explosion. Among them, harmonic and temperature rise are the important factors causing insulation defects of reactor. In order to provide an analysis idea of the influence of harmonics and temperature rise on the fault of 10 kV dry-type iron core series reactor for its operation and maintenance, taking a series reactor of cksc-300 / 10-5 as an example, through the establishment of its equivalent circuit and temperature field model, the effect of two factors on the burnout fault of the reactor was analyzed and studied. The results show that the harmonic is not the most direct factor to cause the burnout of the reactor under the appropriate reactance rate; the temperature rise is not one of the direct factors to cause the burnout of the reactor through the simulation analysis of the temperature field, and the influence of other fault causes still needs to be further considered.