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首页> 外文期刊>Electric Power Components and Systems >Letter to the Editor: Inclusion of Sensitive Equipment Immunity in the Overcurrent Protection of Transmission and Sub-transmission Systems
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Letter to the Editor: Inclusion of Sensitive Equipment Immunity in the Overcurrent Protection of Transmission and Sub-transmission Systems

机译：致编辑的信：在传输和子传输系统的过流保护中包含敏感的设备抗扰性

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摘要

Nearly 80% of customer complaints about power quality (PQ) are related to voltage sags. Voltage sags due to short-circuit faults are detected and their effect is detrimental hundreds of miles away from the fault location. Overcurrent protection must be done taking PQ issues into account. By transforming the voltage/time immunity curve into a current/time curve it can be coordinated with the normal time/current characteristic (TCC) of protective devices. Having the SE immunity curve, the TCC of protective devices, and the fault occurrence index, a complete evaluation of the whole power-quality and overcurrent-protection interaction can be assessed.
机译：客户对电能质量（PQ）的投诉中，有近80％与电压骤降有关。可以检测到由于短路故障而引起的电压骤降，其影响距离故障位置数百英里。必须考虑PQ问题进行过电流保护。通过将电压/时间抗扰度曲线转换为电流/时间曲线，可以将其与保护设备的正常时间/电流特性（TCC）进行协调。具有SE抗扰度曲线，保护装置的TCC和故障发生指数，可以评估整个电源质量和过流保护相互作用的完整评估。

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