2) unbalanced faults
不对称故障
1.
Based on the characteristic of negative- sequence equivalent electric circuit under the unbalanced faults of power system,the unbalanced fault on transm ission line can be located.
基于电力系统不对称故障时负序等值电路的特点进行分析计算以确定输电线路不对称故障点 ,原理上与不对称故障的形式无关 ,方法简单、适用性强。
3) unsymmetrical fault
不对称故障
1.
Application on the quick acting phase relay protection of unsymmetrical fault and double loop-lines;
不对称故障、双回线相继速动保护的应用
4) asymmetrical short-circuit fault
非对称故障
1.
This paper analyzes the factors influencing asymmetrical short-circuit breaking test by circuit breaker, and introduces the test method of asymmetrical short-circuit fault breaking in accordance with the specified criteria of asymmetrical level and current rate at current zero reflecting TRV as well as duration and amplitude of last current loop reflecting arcing energy.
通过分析影响断路器开断非对称故障的因素,介绍了以反映暂态恢复电压的电流零点的非对称水平、电流变化率以及反映电弧能量的最后电流半波的幅值、持续时间等参数为判据进行非对称故障开断的试验方法。
5) unbalanced fault
不对称故障
1.
However,when unbalanced fault occurs in the AC system,negative-sequence components existing in AC system will lead to a lot of non-characteristic harmonics under the action of pulse width modulation(PWM),so the control performance of VSC-HVDC system will be deteriorated.
但是当交流系统发生不对称故障时,系统中存在的负序分量在脉宽调制(pulse width modulation,PWM)的作用下会产生大量的非特征谐波,并严重恶化VSC-HVDC系统的控制性能。
补充资料：对称与非对称
反映客观事物在结构、功能、时空上的特殊联系的范畴。对称指事物以一定的中介进行某种变化时出现的不变性，非对称指事物以一定的中介进行某种变化时出现的可变性。在自然界中普遍存在，形式多样。对称有空间对称(包括形象对称和结构对称)、时间对称、概念对称等。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条