摘要
受电气化铁路牵引负载的影响,上级电网供电电源质量降低,三相电压不平衡度超标,导致变电站保护动作、站内停电、往复式压缩机出现电机轴承振动高报警,甚至出现电机轴承损坏及轴裂纹。对三相电压不平衡的危害进行分析,研究电能质量的治理方案。经过现场连续监测,测量取得电网输入三相电压不平衡参数,通过采用静止无功发生器SVG(Static Var Generator)治理电源三相电压不平衡,并补偿系统无功,治理效果良好。
Due to the effect of traction loads of electrified railways,quality of network power supply is reduced and three-phase voltage unbalance exceeds relative standard,which results in substation protection,high alarm of reciprocating compressor motor bearing vibration,even motor bearing damage and axial cracking.Asymmetrical three-phase power network parameters are obtained through continuous on-site monitor,adopted is the SVG(static var generator) to control power supply three-phase voltage unbalance and provide reactive compensation,accordingly,power supply quality has been improved greatly.
出处
《天然气与石油》
2013年第6期87-90,12,共4页
Natural Gas and Oil
关键词
电能质量
三相电压不平衡
负序
SVG
Power quality
Three-phase unbalance
Negative sequence
SVG
