Semimonthly

ISSN 1000-1026

CN 32-1180/TP

+Advanced Search 中文版
Life-cycle Economic Evaluation of Renewable Energy Access Considering Line Electro-Thermal Coupling
Author:
Affiliation:

Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education (Shandong University), Jinan 250061, China

Fund Project:

This work is supported by Shandong Provincial Key R&D Program of China (No. 2019GGX103044).

  • Article
  • |
  • Figures
  • |
  • Metrics
  • |
  • Reference
  • |
  • Related
  • |
  • Cited by
  • |
  • Materials
    Abstract:

    Taking long-distance large-scale wind farms connected to the grid as the research background, and considering the synchronization effect of environmental factors on the current-carrying law of the transmission line and its mechanical performance degradation, electro-thermal coordination theory and line aging failure model are organically combined. Based on the electro-thermal coupling and life-cycle cost, the maximum allowable temperature assessment model for renewable transmission lines is proposed, which provides an evaluation basis for the renewable energy consumption capacity and operation performance of the grid. The model continuously processes the environmental variable values according to various setting schemes of maximum allowable temperature, and simulates annual variations of electrical and physical state parameters of the line based on the thermal inertia equation of the overhead conductor.Then, the duration of each temperature interval is calculated and the life-cycle performance of line is predicted based on the aging failure model of transmission line. The life-cycle cost of the line can be obtained according to the failure rate model, the annual average profit of investment for transmission line and analytic function expression of the maximum allowable temperature for transmission line on the premise that the access income of unit wind power is fixed, thereby achieving the goal of maximizing the annual average profit. Finally, effectiveness of the proposed model and its effect on improving the economic and safety of the system operation are verified by the actual case study.

    图1 两节点等值系统Fig.1 Two-node equivalent system
    图2 方法流程图Fig.2 Flow chart of the method
    图3 单位小时平均接受功率和线路服役寿命变化曲线Fig.3 Variation curves of average received power per hour and service life of lines
    图4 年平均利润和最大允许温度的关系曲线Fig.4 Curves of relationship between annual average profit and maximum allowable temperature
    图1 两节点等值系统Fig.1 Two-node equivalent system
    图2 方法流程图Fig.2 Flow chart of the method
    图3 单位小时平均接受功率和线路服役寿命变化曲线Fig.3 Variation curves of average received power per hour and service life of lines
    图4 年平均利润和最大允许温度的关系曲线Fig.4 Curves of relationship between annual average profit and maximum allowable temperature
    Reference
    Related
    Cited by
Get Citation

ZHANG Ruiqi,DONG Xiaoming,WANG Mengxia,et al.Life-cycle Economic Evaluation of Renewable Energy Access Considering Line Electro-Thermal Coupling[J].Automation of Electric Power Systems,2020,44(3):83-88.DOI:10.7500/AEPS20190619007

Copy
Share
Article Metrics
  • Abstract:
  • PDF:
  • HTML:
  • Cited by:
History
  • Received:June 19,2019
  • Revised:September 10,2019
  • Adopted:
  • Online: February 14,2020
  • Published: