基于熵权理论的特高压电网落点规划

Terminal Planning of UHV Power Grid Based on Entropy Weight Theory

从评价特高压电网运行特性出发,提出反映电网运行安全性、可靠性和经济性的潮流分布、母线电压水平、短路容量、多馈入有效短路比、短路电流水平、过载安全裕度、工程投资、网络损耗等指标体系,并由此构成评估特高压电网落点备选方案特征的基本指标集;在此基础上,结合熵权理论和专家经验确定综合权重,对基本指标进行修正,并以备选方案指标与理想最优方案指标的贴近度作为特高压落点规划问题的目标函数,完成备选方案的综合评估和最优方案的确定,实现对落点规划问题的高效求解。最后以山东电网特高压直流落点规划为例,验证了所提规划方法的有效性。

Based on the operational characteristics of UHV （ultra-high voltage） power grid, an index system is presented to evaluate the operation security, reliability and economy of the power grid, which include such indices as power flow distribution, bus voltage level, short circuit capacity, multi-infeed effective short circuit ratio, short circuit level, overload security margin and grid loss, and a matrix of basic indices is thus established to evaluate the performance of alternative schemes of UHV terminals. The matrix is improved based on the entropy weight and expert experience. By taking the approach degree between the indices of alternative schemes and that of the ideal optimal scheme as the objective function of UHV terminal planning, the optimal scheme is determined after comprehensive evaluation of the proposed alternative schemes, thus realizing the effective solution to the problems of terminal planning. Finally, the UHVDC terminal Dlanninz of Shandonz zrid is taken as a case study to demonstrate the effectiveness of the pro-posed method.