Terminal Planning of UHV Power Grid Based on Entropy Weight Theory

doi:10.11930/j.issn.1004-9649.2017.02.023.06

Abstract

Abstract: 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 planning of Shandong grid is taken as a case study to demonstrate the effectiveness of the pro-posed method.

Key words: UHV power grid, terminal planning, evaluation system, multi-objective optimization, entropy weight, compre-hensive weight

CLC Number:

TM715

NIU Xinsheng, LI Xueliang, CHAI Yun, SHI Xiaohan, JIA Shanjie, LIU Xiaoming, MOU Hong, WANG Yuan, ZHANG Jie. Terminal Planning of UHV Power Grid Based on Entropy Weight Theory[J]. Electric Power, 2017, 50(2): 23-28.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.2017.02.023.06

https://www.electricpower.com.cn/EN/Y2017/V50/I2/23

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