变电站高压开关操作电快速瞬变脉冲群干扰建模及仿真研究

Modeling and Simulation of High Voltage Switch Operating Electrical Fast Transient Burst Interference in Substation

变电站内高压开关操作时断口电弧反复切断和重燃,在系统中产生电快速瞬变脉冲群,通过传导或辐射形式影响二次设备的正常工作。利用ATPDraw软件建立高压开关操作电快速瞬变脉冲群干扰模型,特别采用多开关联合控制模拟电弧的重燃与熄灭过程。仿真研究变电站高压开关切断空载变压器和感性负载时所引起的电快速瞬变脉冲群,分析了瞬态过程的时、频特征;从理论上阐述了瞬态过程的影响因素并以仿真进行了验证,可为变电站高压开关操作电快速瞬变脉冲干扰的抑制提供理论指导。

In substation, when high voltage switch is operated, the fracture arc is repeatedly cut and re-ignited, producing electrical fast transient burst in the system, and affecting the secondary equipment in the form of conduction or radiation. In this paper, electrical fast transient burst interference model of high voltage switch operation is established by ATPDraw software, and multi-switch is jointly used in particular to control and simulate the process of arc renewed and extinguished. The simulation of electrical fast transient burst introduced by high- voltage switching off the no-load transformer and inductive load in substation is simulated and studied. The time and the frequency characteristics of the transient process are analyzed. Elaborated factors that affect the transient process are presented with theory and verified by simulation. This study can provide theoretical guidance for suppression to electric fast transient pulse interference of high voltage switch operation in substation.