时限特性 meaning in English
selectivity characteristic
Examples
- But routine electronic protector ca n ' t realize the protection for counter time limit , which is matching with the graph of heat over - loading protect . it can only realize " single point protection " and ca n ' t protect the failure happened during start - up
但是常规电子式保护器无法实现与电机热过载保护特性曲线相匹配的反时限特性保护，只能实现“单点式”保护，无法保护启动过程中出现的故障。 - Applying relative arithmetic to all kinds of faults and calculating off - line , we can master time - distance relation chart for all kinds of faults . computation indicates : when transmission lines occur faults , the data window of protection algorithm consisting of prefault and postfault data at the same time has important significance . the following methods are useful to achieve the inverse time characteristic : calculating impedance by using flourier in a full cycle , calculating work voltage by using fault component , calculating the torque created by a phase comparator or a magnitude comparator
实际的计算表明：输电线路发生故障后，用故障前后的数据同时充满保护算法的数据窗，对于快速切除近区故障具有很重要的意义；同时利用故障前后的数据，下述方法可以比较好地实现距离保护的反时限特性：直接用全周傅里叶算法进行阻抗计算；采用工频变化量阻抗继电器进行工作电压的计算；采用转矩的思想进行转矩的计算。 - So it is very important to investigate the inverse time characteristic of microprocessor distance protection . this paper emulates all kinds of faults of transmission lines by using emtp , and gets relative current and voltage sample values . then many distance protection thoughts and algorithms are adopted to compare each inverse time characteristic , better arithmetic and set thoughts are got
本论文应用emtp进行输电线路各种故障情况的仿真，采样取得保护相关的电压、电流数据；采用各种距离保护思想、算法，采用c语言进行计算，比较各自的时限特性，得出反时限特性比较好的算法及其整定思路；对于各种故障情况，应用相关整定思路进行离线计算，得出各种原理的时间距离特性。 - A simple and easy operating criterion is put forward in accordance with the relation between positive - sequence component and negative - sequence component of stator current when the motor is in unbalance and single phase broken . based on analyzing the traditional inverse time - lag overloading protection of motors , an inverse time - lag operating equation with accumulating stator current is achieved , according to the differential equation of the heating and cooling while the current flows into the conductor
在分析电动机传统的反时限过负荷保护的基础上，根据导体中流过电流时的发热、散热微分方程得到了累加定子电流的反时限过负荷保护动作方程，经简化后得到累加定子电流的实用的反时限特性递推公式。