电力电容器的保护.doc

电力电容器的保护研究
李福贺
辽宁工程技术大学电力系,辽宁葫芦岛(125000)
(**********)
摘要:电容器是电力系统的重要设备,它们的故障给供电可靠性和统的正常运行带来了严重的影响,因此,早期预测电气设备的内部故障对于安全发供电、防止事故是极为重要的。电容器作为电力系统无功补偿的重要方式,在保持网络功平衡,提高电压质量,降低网络损耗等方面具有有效措施,是降损措施中投资少回报高的最佳方案,因此,解决变压器的故障诊断和电容器的保护监测,对电网的安全和降损节能都有着重要的意义。
关键词:电容器;保护;故障监测
Approach on Power Capacitor Protection
Fuhe Li
Liaoning Technology University,Huludao(125000)
(**********)
Abstract
The capacitor are electrical power system's importantequipment, their breakdown has brought the serious influence for the power supplyreliability and system's normal operation, therefore, the early prediction electricalequipment's internal breakdown regarding sends the power supply, the forestalltrouble is safely the great importance. The capacitor takes the electrical power system idle pensation the important way, at maintains work idle work is balanced,improves the voltage quality, reduces aspects and so work loss to have theeffective action, is falls damages in the measure to invest moves back the newspaperhigh preferred plan, therefore, solves transformer's failure diagnosis and capacitor'sprotection monitor, and falls to work's security damages the energy conservation to have the vital significance.
Keywords:;Capacitor ;protection;Fault monitor
引言
电力系统的负荷和供电设备如电动机、变压器、互感器等,除了消耗有功功率外,还要吸收无
功功率。电容器在交流电压作用下能发出无功功率,如果把电容器并接在负荷(如电动机)或供电设备(如变压器)上运行,那么,负荷或供电设备要吸收的无功功率,正好由电容器“发出”的无功功率供给,并联补偿减少