in the method zero sequence voltage is discussed and new principle for automatic fault location and isolation based on the zero sequence voltage is presented in this paper 该方法以馈线电压变化量为故障点定位的主要判据进行故障点自动监测与定位,并迅速隔离故障区段,恢复正常区段的供电。
in the method zero sequence voltage is discussed and new principle for automatic fault location and isolation based on the zero sequence voltage is presented in this paper 该方法以馈线电压变化量为故障点定位的主要判据进行故障点自动监测与定位,并迅速隔离故障区段,恢复正常区段的供电。
the four leg inverter with a neutral leg can control the zero sequence voltages and currents, suitable for the unbalanced loads, widely used in applications require a precise neutral current control, such as ups, aviation power, et al 四桥臂逆变器由于采用第四个桥臂作为四线制输出的中点,所以可以控制零序电压和电流,适用于ups,航空电源等带不对称负载的场合。
according to zero sequence voltage distribution from system zero sequence impedance to shunt reactor zero sequence in zero sequence circuit, the zero sequence voltage at the terminal of shunt reactor and the zero sequence compensating voltage at neutral are compared in the scheme 即根据零序网络中零序电压在系统零序阻抗和电抗器零序阻抗上的分布情况,通过直接比较电抗器首端零序电压与补偿到电抗器末端中性点的零序补偿电压的幅值大小,来判别电抗器匝间故障。
according to zero sequence voltage distribution from system zero sequence impedance to shunt reactor zero sequence in zero sequence circuit, the zero sequence voltage at the terminal of shunt reactor and the zero sequence compensating voltage at neutral are compared in the scheme 即根据零序网络中零序电压在系统零序阻抗和电抗器零序阻抗上的分布情况,通过直接比较电抗器首端零序电压与补偿到电抗器末端中性点的零序补偿电压的幅值大小,来判别电抗器匝间故障。