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对输电设备的利用份额问题建立了数学模型，提出了潮流标注图上不存在有向回路的定理，在此基础上利用图论方法开发了适合任何复杂电力系统的高效算法。计算并分析了参考文献［２］中ＵＫ－３０节点系统输电设备利用份额问题，指出该文献的算法是错误的。
A mathematic model is established for the utilization share of transmission equipment. A theorem is proposed that there is no directed loop on the trend notation graph. Based on this, an efficient algorithm suitable for any complex power system is developed based on graph theory. The problem of using share of transmission equipment in UK-30 node system in reference [2] is calculated and analyzed, and the algorithm in this paper is wrong.