摘要
提出了一种新的消弧线圈。实验证明,该消弧线圈调感线性度好,调感速度快,补偿电流中谐波含量低等,并且不需要接地变压器提供接入中性点,特别适用于我国6/10kV配电变压器三角形接线的电网。提出了一种"接地"电流的测量方法。首先测量出电网正常运行的零序电压,而后控制消弧线圈输出1个已知的增量补偿电流,再测得该增量补偿电流输出后的电网零序电压值,依据这3个量可准确计算出电网的接地电流。模拟试验和挂网运行均证明该方法测量简便、精确。
A new type arc suppression coil was proposed.Tests show that it’s outstanding features,such as good inductance linearity,high speed of inductance regulation,low harmonic component etc.,and particularly applicable to network of 6/10 kV distribution transformer that is triangle wiring in China as well,for the coil does not need a neutral point provided by grounding transformer.A new measurement method of one-phase-earth fault current was proposed.First,a zero-sequence voltage was measured;second,a known increment of compensation current was exported by controlling arc-suppression coil;then,other zero-sequence voltage was also measured.According to above 3 values,the one-phase-earth fault current was calculated.Test and operation results indicate that the measurement has a high accuracy and is easy to measure.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2010年第6期1045-1049,共5页
Journal of China Coal Society
关键词
消弧线圈
谐振接地
调谐控制
接地电流测量
arc suppression coil
resonance grounding
tuning control
measurement of the phase-to-earth fault current
