首端 meaning in English

forward end
head end

In this way , the wattless power of the test signal at the head spot of the fault is only needed to sample when the system fault occurs , which simplifies the measurement
这样，当系统发生故障时，只需采集故障首端测试信号的无功功率，大大地简化了测量的方法。
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。
If the bus and breaker ' s failure rate is n ' t included in account , the reliability indices will be better , and the result will be more optimistic . at the same time , the connection styles " affection on system reliability is analyzed . thirdly , a novel evaluation method based on dfs is studied
然后，提出了一种基于dfs的修正最小路算法用于可靠性评估，采用dfs算法求取从分支线首端到负荷点的最小路，然后根据系统的配置和实际运行方式，把非最小路上元件对负荷点可靠性指标的影响计入计算，从而计算系统可靠性指标。