摘要
提出了一种以负荷点可靠性评估为核心的基于最小路法和故障扩散法相结合的复杂配电系统可靠性评估算法。该算法既能快速求取指定负荷点的可靠性指标,又能得出系统可靠性指标。分析了以负荷单元为参照的单元分类方法。通过最小路以及基于最小路的子系统划分,实现了负荷点可靠性指标的计算和系统可靠性指标的估计。论文还根据工程实际提出了一种处理转供容量约束的新方法,既能有效计及转供及其容量约束对可靠性指标的影响,又避免了潮流计算及其计算条件设置问题,提高了可靠性评估速度。同时介绍了容量越限后的切负荷策略判别方法,并通过实例验证了所提算法的有效性。提出的算法已编成应用软件,并在深圳供电局委托开展的项目《深圳10kV配电系统可靠性研究》中使用,取得了良好的效果。
A novel reliability evaluation method aiming at the load point reliability indices is proposed for complicated distribution systems based on combination of the minimal-path method and the fault-spreading-method. The method can rapidly obtain the reliability index of individual load point as well as the reliability indices of the whole system. The load-targeted unit classification method is discussed. Through searching of the minimal path and the minimal-path based sub-system separation, the developed software can calculate the reliability indices of each load point and then obtain the system indices. A practical method to consider the constraint of alternative supply capacity and its influence on the reliability indices are proposed which avoids the time-consuming load flow calculation and enhances the velocity of the algorithm greatly. The automatic load-shedding decision method in case of capacity violation is studied too and the validity of the proposed method is examined by some numerical examples.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2008年第20期15-19,32,共6页
Power System Protection and Control
关键词
配电系统可靠性评估
最小路法
故障扩散法
转供容量约柬
distribution system reliability evaluation
minimal path method
fault-spreading-method
alternative supply capacity constraint
