| 1. | Negative sequence inverse time overcurrent protection
负序反时限过流保护装置 |
| 2. | Microprocessor - based inverse time over - current protection algorithm
微机反时限过流保护算法 |
| 3. | Inverse time overcurrent relay
反时限过电继电器 |
| 4. | An inverse time - lag operating equation with accumulating stator current is achieved in this paper , according to the heating of the motor
根据同步电动机发热机理，建立了累加定子电流的同步电动机发热模型，较真实地反应了同步电动机的发热过程。 |
| 5. | The algorithms of microprocessor distance protection emulated and calculated in this paper are used to realize the inverse time characteristic of microprocessor distance protection
本课题仿真计算的保护算法用于实现高压线路微机距离保护的反时限。微机距离保护是高压线路的重要保护之一。 |
| 6. | 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。 |
| 7. | 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。 |
| 8. | 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。 |
| 9. | The device can protect start - up status and running status of asynchronous motors by differential protection , over current protection , negative - sequence current protection , zero - sequence current protection , inverse time current protection , under - voltage protection and so on , can measure every kind of electricity , and can process the function of telecontrol , telemetering and telecommunication
其依靠电流差动、速断、负序过流、反时限、零序过流和低电压等保护方法实现了片电动机的运行、启动和自启动过程进行保护，并实现各种电量的计量，同时具有遥控、遥测、遥信的功能。 |
