含新能源的电力系统安全性评估

Research on Security Evaluation of Power System With New Energy

为解决高比例新能源的接入给电网安全稳定性带来的潜在威胁,采用综合评价法实现新能源电力系统安全性评估和薄弱系统辨识,提供更加全面的系统安全运行决策参考信息。首先,建立新能源电力系统安全性评价指标体系,其次,分别采用决策实验与评价实验室(decisionmaking trial and evaluation laboratory,DEMATEL)法与反熵权法计算指标的主客观权重;第三,依据相对熵思想计算综合权重;最后,以改进的IEEE-118母线不同渗透率新能源电力系统为参考,采用多准则妥协解排序法(Vi?eKriterijumska Optimizacija I Kompromisno Re?enje,VIKOR)进行综合评估与优劣排列分析和灵敏度验证。不同新能源渗透率电力系统安全性排序为:10%>40%>20%>30%>50%,其评估结果可在实际工程中参考应用。

To deal with the potential threat to the security and stability of power grid caused by high proportion of grid-con-nected new energy,a comprehensive evaluation method was utilized to realize the security evaluation and the identification of weak power grid to provide a more comprehensive reference information for the decision of system secure operation.Firstly,a security evaluation index system for the power grid contain-ing new energy was established.Secondly,the decision-mak-ing trial and evaluation laboratory(abbr.DEMATEL)method and the anti-entropy weight (abbr. AEW) method were used to calculate the subjective and the objective weights of the index. Thirdly, based on the thought of relative entropy the compre- hensive weight was calculated. Finally, taking the modified IEEE-118 bus new energy power system with different per- meability as a reference, and by use of Više-Kriterijumska Op- timizacija I Kompromisno Rešenje (abbr. VIKOR) method the comprehensive evaluation, the ranking analysis on the advant- ages and disadvantages as well as the verification of sensitivity were conducted. The security ranking of new energy power sys- tems with different permeabilities is as following: 10% >40% > 20% >30% >50%, and such an evaluation results can be avail- able for reference and utilized in practical engineering.