静止无功发生器在电气化铁路中的应用与探索

针对电气化铁路单相、非线性的冲击负荷的特点,静止无功发生器(SVG)对于提高牵引供电系统功率因数具有重要意义。该文主要介绍SVG的工作原理,并以黔桂线南丹牵引变电所SVG改造工程为背景,以减少运行单位罚款为契机,通过改变SVG装置电流采样点位置来补偿全所无功功率的可行性进行理论分析及实践。结果表明,通过此种方式,尤其在轻负荷侧安装时,容易造成过补偿,引起补偿支路过电压跳闸。为同类工程在实施提供借鉴,具有一定参考意义。

According to the characteristics of single-phase and nonlinear impact load of electrified railway,static var generator(SVG)is of great significance to improve the power factor of traction power supply system.This paper mainly introduces the working principle of SVG,and takes the SVG reconstruction project of Nandan traction substation on Guizhou-Guangxi Line as the background,taking the opportunity of reducing the fine of the operating unit,carries on the theoretical analysis and practice on the feasibility of compensating the reactive power of the whole institute by changing the position of the current sampling point of the SVG device.The results show that in this way,especially when installed on the light load side,it is easy to cause overcompensation and overvoltage tripping of the compensation branch.It provides a reference for the implementation of similar projects,and has a certain reference significance.