基于功率追踪的输电网损耗分配方法研究

Study on the losses location of transmission system based on power tracing

本文针对传统功率追踪法的不足,给出了线路和变压器元件上的复功率损耗分配计算的方法,推导了具有多条等值支路的电力元件的复功率损耗分配算法,提出了一种适用任意结构输电网的复功率损耗分配方法。这种方法考虑了有功和无功之间的交叉作用对损耗分配的影响,克服了已有追踪法需要将线路对地电容做电源或移植处理、需要虚构理想的无损网络、需要将有功和无功潮流解祸追踪的缺陷。

Pointing to the deficiency of traditional power tracing method, a new method for allocating complex losses in power elements with multi-equivalent series and parallel branches is derived resorting to newly proposed branch＇ s losses allocation method. Then a new complex loss allocation method is proposed, which is applicable for arbitrary configurations of transmission systems. The impact on losses allocation of interaction between active and reactive powers is well considered in this method. The new method is concise and easy to implement. It overcomes defects of the existing tracing methods, such as need transplanting all parallel （or shunt） branches, making fictitious lossless networks and tracing P/Q flow in a decomposition way.