等值电阻法计算配电网损耗的理论和实践

Theory and practice of distribution network loss calculation through method of equivalent resistance

为了能较准确计算运行中配电网的电能损耗,对等值电阻法进行了理论推导。等值电阻法适用于运行中配电网络电能损耗计算,它把配电网络通过元件的有功损耗视为通过配电网线路等值电阻和配电变压器等值电阻所产生的有功损耗,在配电网线路等值电阻和配电变压器的等值电阻计算出来之后,便可求得在某时段内配电网的电能损耗。实践证明等值电阻法能满足线损管理应用的要求,它是目前配电网线损计算合适和实用的方法。

Through theoretical deduction the method of equivalent resistance suitable for calculation of in-service distribution network loss is introduced in this paper. In this method, the active loss of the distribution network current passing an element is regarded as that caused when passing the equivalent resistances of the distribution lines and the distribution transformer. The distribution network loss in a given period can be achieved after the equivalent resistances of the distribution lines and the distribution transformer are figured out. Practice proves that the method meets the needs of line loss management, and it is deemed to be a proper and useful method for distribution network line loss calculation at present.