考慮負(fù)荷重要度的配電網(wǎng)節(jié)點脆弱性分析

 

孔維旭

（西安石油大學(xué) 電子工程學(xué)院，陜西 西安 710065）

 

    摘 要：由于配電線路具有輻射狀拓?fù)浜烷_環(huán)運行狀態(tài)特性，以致傳統(tǒng)的脆弱性評估方法不再適用，而基于復(fù)雜網(wǎng)絡(luò)理論的評價方案雖可以準(zhǔn)確識別網(wǎng)絡(luò)拓?fù)涞闹匾?jié)點，但是未能考慮到不同負(fù)荷等級對于脆弱性的影響，會導(dǎo)致脆弱性分析的結(jié)果不準(zhǔn)確。結(jié)合配電網(wǎng)自身特點，給出了一種分析配電網(wǎng)脆弱性的改進(jìn)評估方案?；诮Y(jié)構(gòu)脆弱性分析，構(gòu)建節(jié)點度、節(jié)點介數(shù)指標(biāo)，使用節(jié)點注入功率和節(jié)點負(fù)荷等級進(jìn)行加權(quán)，以彰顯優(yōu)先級別負(fù)荷的重要性；基于狀態(tài)脆弱性分析，使用靈敏度分析方法構(gòu)建節(jié)點電壓敏感度指標(biāo)?？紤]到配電網(wǎng)元件對節(jié)點脆弱性的影響，使用風(fēng)險理論構(gòu)建節(jié)點故障影響度指標(biāo)。運用層次分析法對各項參數(shù)進(jìn)行賦權(quán)，并得出適用于配電網(wǎng)的綜合脆弱性指標(biāo)。使用IEEE 33節(jié)點算例對評估模型進(jìn)行了仿真，驗證了所提指標(biāo)及脆弱性評估體系的可行性。

    關(guān)鍵詞：脆弱性分析；復(fù)雜網(wǎng)絡(luò)理論；配電網(wǎng)；層次分析法

    中圖分類號：TM727     文獻(xiàn)標(biāo)識碼：A     文章編號：1007-3175(2021)03-0008-05

    Abstract: Due to the characteristics of radial topology and open-loop operating status of distribution lines, traditional vulnerability assessment methods are no longer applicable. The evaluation scheme based on the complex network theory can accurately identify the important nodes of the network topology, but it fails to consider the impact of different load levels on the vulnerability, which will lead to inaccurate results of the vulnerability analysis. In this paper it combines with the characteristics of the distribution network presents an improved evaluation scheme for analyzing the vulnerability of the distribution network. First, based on the structural vulnerability analysis, the node degree and node intermediary indexes are constructed, and the node injection power and the node load level are used to weight to highlight the importance of the priority load. Based on the state vulnerability analysis, the sensitivity voltage analysis method is used to construct the node voltage sensitivity indicators. At the same time, considering the influence of the distribution network components on the vulnerability of the nodes, based on the risk theory, the influence index of the node failure is constructed. Secondly, the AHP is used to weight various parameters, and a comprehensive vulnerability index suitable for the distribution network is obtained. Finally, the IEEE 33 node example is used to simulate the evaluation model, which verifies the feasibility of the indicators and vulnerability assessment system proposed in this paper.

    Key words: vulnerability analysis; complex network theory; distribution network; AHP