摘要
串联补偿设备往往通过注入变压器补偿电源侧电压质量问题,保证重要负荷的电压质量。然而,注入变压器铁心磁通会因为补偿注入电压初始相角的不同,在很大范围内变化,可能造成注入变压器的过度饱和,不但产生极大的激磁涌流、引起注入补偿电压的畸变,对变压器、逆变器的安全运行造成威胁,还会大大增加继电保护误动作的可能性,降低供电可靠性。分析了注入变压器发生过饱和的机理,提出了抑制注入变压器发生过饱和的高次谐波注入控制策略及算法,并通过计算和仿真验证了算法的正确性。
The dynamic voltage restorer (DVR) faces injection transformer risks generating field inrush current because of the over-saturation of the transformer. It not only causes DVR to lose compensating function, but also threatens the safe operation of the transformer and inverter. The saturation mechanism of the injection transformer is analyzed and a novel harmonics injection control approach of suppressing the transformer saturation to avoid the considerable consumption of the effective material is presented. The validity of the control approach and algorithm is verified by calculation and simulation..
出处
《电力系统自动化》
EI
CSCD
北大核心
2004年第24期28-31,共4页
Automation of Electric Power Systems
关键词
动态电压调节器
注入变压器
过饱和
激磁涌流
抑制
<Keyword>dynamic voltage restorer (DVR)
injection transformer
over-saturation
field inrush current
suppression
