低压大电流短路试验系统功率因数测量方法探讨

摘要

针对低压大电流短路试验系统功率因数的测量，在对传统相角差法测量进行优化的基础上，提出了相位偏移法和硬件电路模拟法；对冲击系数法适用性进行相应的拓宽，提出了优化冲击系数法。最后，通过理论和实例验证，证明了方法的实用性。%For low voltage&high current short circuit test system,how to measure the power factor accurately in an ultimate short duration is a complex topic.Currently there is no precise method to realize the accurate measurement of power factor or time constant.The phase shift method and hardware circuit simulating method,which are created on the basis of hardware optimizing and software update,were proposed to realize the effective power factor calculation.At the same time,the applicability of using impulse coefficient in most of current local test centers was broaden in this paper.This would help to save the hardware investment on the basis of effective power factor measurement.Finally the theory method.and the example verification were used to validate the effectiveness and feasiblity of the method.