摘要
针对变压器空载合闸时会产生励磁涌流的问题,首先,分析了励磁涌流产生的机理以及通过合闸角相位控制抑制励磁涌流的方法。其次,深入分析了配电系统中开关联动操作的三相变压器励磁涌流抑制策略,并提出正序电压相位控制方法。研究表明,基于正序电压相位控制的方法,对于开关联动操作的三相变压器发生各种故障分闸后再次合闸时,可以有效抑制或削弱励磁涌流。最后,将正序电压相位控制方法应用于变压器保护测控装置中,通过动态模拟试验,验证了正序电压相位控制法对于抑制开关联动操作的三相变压器励磁涌流的有效性和实用性。
Aiming at the problem that magnetizing inrush current will be generated when the no-load transformer switching,the mechanism of magnetizing inrush current and the method of suppressing the inrush current through closing angle phase control were analyzed.On this basis,the inrush current suppression strategy of three-phase transformer with switch linkage operation in distribution network system was deeply analyzed,and the suppression method of transformer inrush current based on positive sequence voltage phase control was proposed.Research shows that based on the positive-sequence voltage phase control method,magnetizing inrush current can be effectively suppressed or weakened when the three-phase transformers which operate in linkage with the switch are closed after various faults are opened.Finally,the positive-sequence voltage phase control method is applied to the transformer protection measurement and control device.The validity and practicability of the positive-sequence voltage control method for inrush current suppression of three-phase transformer in conjunction with switching are verified by the dynamic simulation test.
作者
齐以年
胡兵
王闰羿
QI Yinian;HU Bing;WANG Runyi(Nanjing Guodian Nanzi Automation Co.,Ltd.,Nanjing 211153,China)
出处
《供用电》
2020年第2期67-72,84,共7页
Distribution & Utilization
关键词
正序电压
相位控制
变压器
空载合闸
励磁涌流
positive sequence voltage
phase control
transformer
no-load closing
inrush current
