摘要
文章指出了谐振过电压是导致中性点不接地系统电磁式电压互感(TV)出现故障的主要原因。韶关钢铁集团焦化厂抑制过电压的方法有减少TV的运行台数和在6kV系统中实行TV不接地运行。该厂的改造效果明显。文章还提出了其他防止铁磁谐振的方法,如TV中性点处安装消谐器或串接电阻等。
The paper pointed out that resonance over-voltage is the major reason of causing the faults of electromagnetic voltage transformer in ungrounded power system. Guangdong Shaoguan Steel Group adopted the measures to restrain over-voltage,such as reducing the operation number of voltage transformer and ungrounded operation of voltage transformer in 6 kV system. The effect of these measures is obvious. The paper also put forward the other methods for preventing ferro-resonance,such as installing the resonance elimination device or series resistance in neutral point of voltage transformer.
出处
《电力设备》
2007年第10期48-49,共2页
Electrical Equipment
关键词
铁磁谐振
不接地系统
电压互感器
ferro-resonance
ungrounded system
voltage transformer
