A Method for Benefit Evaluation and Investment Optimization Considering Functional Differences in Transmission and Transformation Projects

doi:10.11930/j.issn.1004-9649.201902001

Abstract

Abstract: With the deepening of reform in power system, the investment of transmission network construction in China tends to transit from extensive growth to high-quality development. Therefore, for the purpose of refining the investment approach of the power grid, it is of great significance to propose an investment benefit evaluation and optimization method by taking account of the functional differences of transmission and transformation projects. In order to accurately evaluate the benefits of transmission and transformation projects with different functions, firstly, an evaluation index system of transmission and transformation projects including the functional differences specified was established considering the benefits of technology, economy and society, according to the functional classification of the projects, and based on the main benefits of different functional projects in terms of the functionalities provided. Secondly, the graph theory and optimization theory was introduced to calculate the weights of indexes, and corresponding method was put forward to distinguish the difference of project benefits and reduce the subjective error in the existing method. Finally, an investment allocation and project optimization model classified by project function was established based on the project evaluation results in combination with the present status and scale of the power grid as well as the investment constraints. Taking the 220 kV transmission and transmission projects in Hunan as the example, it is verified that the proposed method can effectively quantify the investment benefit of different functional transmission and transformation projects, and is helpful to improve the investment efficiency of the power grid.

Key words: transmission and transformation projects, functional difference, investment efficiency, graph model, weight, investment optimization

CLC Number:

TM74

WANG Zhicai, CAI Ye, TAN Yudong, XIE Xintao, JIANG Zhengwei, LIN Minjuan. A Method for Benefit Evaluation and Investment Optimization Considering Functional Differences in Transmission and Transformation Projects[J]. Electric Power, 2019, 52(11): 175-184.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.201902001

https://www.electricpower.com.cn/EN/Y2019/V52/I11/175

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