【作者】 郭丽娟； 梁小冰；

【机构】 广西电力试验研究院； 广西大学电气工程学院；

【摘要】 本文分析了切换10kV 电容器组时,在400V 用户母线上产生的暂态过电压放大现象。对可能影响放大现象的各种因素,如10kV 补偿电容器容量、用户侧用于补偿功率因素的补偿电容器容量、用户侧降压变压器的容量以及系统阻尼等,用电磁暂态程序 EMTP 作了全面的仿真分析。说明了放大暂态对用户设备的影响并讨论了抑制放大暂态过电压的措施。对这个问题较好的解决办法是在用户侧功率因素补偿电容器上串接一个电感以形成谐波滤波器。更多还原

【Abstract】 This paper analyzes the magnification of transient voltages at 400V customer buses during 10kV capacitors switching.Various factors affecting this phenomenon,such as the capacities of 10kV compeusatmg capacitors and customer power factor correcting capacitors,the customer step down transformer size,and the customer load characteristics,are analyzed in detail with EMTP.The impact of magnified transients on customer equipments is described and possible precautions against the transient over-voltages are discussed.The better solution to this problem is to connect an inductor in series with the customer power factor correcting capacitors and to form a harmonic filter.更多还原