单相断线和两相断线是三相电网中最常见的两种故障，占纵向不对称故障的绝大多数。
Single phase broken line and two-phase broken line are two faults easy too see in power system, which account more in all broken line fault.
电弧炉是一种严重的不对称冲击负载，它将产生大量的负序分量而污染电网，所以需要对其进行平衡化补偿。
Arc furnace is a typical unbalanced impact load. It pours a great deal of negative sequence component to power system, so measures shou ld be taken to compensate the arc furnace load.
本文将井下供电网路多种故障归结为“电流不对称”现象，以其作为保护动作的反映源。
Paper sums up various faults occurring in underground power network as a phenomenon of current unsymmetry, by the display of which the protection is thereby activated.
基于节点参数模型系统地研究了不对称输电网故障分析计算的参数保留法。
Based on network node parameter model, a method to calculate faults in unsymmetrical transmission systems is presented.
提出了一种基于相坐标系的配电网三相不对称解耦的状态估计算法。
A new algorithm for state estimation based on the fast decoupling of distribution system's asymmetrical phases in phase coordinates is proposed.
自二十世纪七十年代以来，由于电力电子器件及其它非线性负荷在电网中大量的投入使用，使电网的非线性、不稳定性和不对称性日趋严重。
Since 1970s, the nonlinear, the instability and theunbalance of the voltage have become more and more serious due to the electronic device and other nonlinear load in power network.
提出一种电网电压不对称情况下抑制三相脉宽调制(PWM)电流型变流器(CSC)直流输出电流二次谐波、减少网侧电流低次谐波的控制方法。
This paper presents a new control strategy to eliminate second harmonic of dc output current in the 3-phase unbalanced network voltage PWM current-source converters (CSC).
电力电子装置通常设计运行在系统(电网)对称条件下，因此当系统电压不对称时可能会对装置产生严重影响。
Power electronic devices are usually designed to operate in symmetric power systems. So installing power electronic devices in unbalanced power systems can cause problem.
电力电子装置通常设计运行在系统(电网)对称条件下，因此当系统电压不对称时可能会对装置产生严重影响。
Power electronic devices are usually designed to operate in symmetric power systems. So installing power electronic devices in unbalanced power systems can cause problem.
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