文章摘要
张睿祺,董晓明,王孟夏,等.计及线路电热耦合的新能源接入通道全寿命经济性评估[J].电力系统自动化. DOI: 10.7500/AEPS20190619007.
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. DOI: 10.7500/AEPS20190619007.
计及线路电热耦合的新能源接入通道全寿命经济性评估
Life-cycle Economic Evaluation of Renewable Energy Access Considering Line Electro-thermal Coupling
DOI:10.7500/AEPS20190619007
关键词: 老化失效  电热耦合  全寿命周期  故障率  年平均利润
KeyWords: aging failure  electro-thermal coupling  full life cycle  failure rate  annual average profit
上网日期:2019-12-02
基金项目:
作者单位E-mail
张睿祺 山东大学电气工程学院 zhang_ruiqi@foxmail.com 
董晓明 山东大学电气工程学院 dongxiaoming@sdu.edu.cn 
王孟夏 山东大学电气工程学院 wangmx@sdu.edu.cn 
杨明 山东大学电气工程学院 myang@sdu.edu.cn 
王勇 山东大学电气工程学院 yonwong@sdu.edu.cn 
摘要:
      以大规模风电远距离传输并网为研究背景,考虑环境因素对新能源传输通道载流规律及其机械性能劣化影响的同步作用,将电热协调理论与线路老化失效模型有机结合,提出了基于电热耦合和全寿命周期成本的新能源承载线路最大允许温度评估模型,为电网的新能源消纳能力及其运行绩效提供评价依据。模型依据多种最大允许温度设定方案,连续化处理环境变量值,基于架空导线热惯性方程模拟线路全年电气和物理状态参量的变化。统计各温度区间的持续时间并依据输电线路老化失效模型预估线路全寿命周期性能演化,基于故障率模型计算线路全寿命周期成本,在单位风电接入收益固定的前提条件下建立输电线路投资年平均利润与线路最大允许温度的函数解析表达,从而实现年平均利润最大化目标。最后通过实际场景算例分析验证所提模型的有效性,及其对提高系统运行经济性和安全性的作用。
Abstract:
      Taken the grid connected to remote large-scale wind farms as the research background, allowing for the synchronization effect of environmental factors on the current-carrying law of the transmission line and its mechanical performance degradation, the maximum allowable temperature assessment model for transmission lines is proposed with electro-thermal coordination theory and line aging failure model combined. Based on the electro-thermal coupling and full life cycle cost, it provides an evaluation basis for the renewable energy consumption capacity and operational performance of the grid. The model continuously processes the environmental variable values and simulates the changes of electrical and physical state parameters of the line based on the thermal inertia equation of the overhead conductor in the whole year. Then, the life cycle performance of line is predicted based on the statistical duration of each temperature interval according to the aging failure model of transmission line. The life cycle cost of overhead line can be obtained by the failure rate model, afterwards the annual average profit is expressed as a function of the maximum allowable temperature of transmission line under the premise that the unit wind power access income is fixed, thereby achieving the goal of maximizing the annual average profit. Finally, effectiveness of the proposed model is verified by the actual case study and its effect on improving the economic and safety of the system.
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