为了能更全面地评价输电系统的可靠性水平,提出了基于连接点的可靠性统计评价方法,并给出了输电系统连接点的定义、确定方法以及基于连接点的输电系统可靠性评价指标体系和具体指标的统计计算公式.所提方法从输电系统用户角度出发,通过在系统连接点处采集停电信息并统计计算相关指标从而反映输电系统连续供电能力,考虑了系统短时停电,其趋势性指标能反映系统可靠性的变化趋势.实际算例进一步验证了所提方法的有效性及实用性,能够体现系统网架结构对可靠性的影响,从而比较不同系统之间可靠性的情况.%The reliability assessment based on connection point analysis is proposed to more comprehensively estimate the reliability level of transmission system. The definition of connection point and its identification, as well as the assessment index system of transmission system and its calculation formulas,are introduced. It collects the outage information of connection points in the system and calculates the related statistical indices to reflect the power supply capability transmission system. The momentary outage is considered and the trend of reliability change is reflected by the tendency index. Its effectiveness and practicability are verified by case study,which shows the influence of system structure on system reliability in the comparison of reliability condition between different transmission systems.
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