基于序列运算的含分布式发电配电网潮流分析

摘要

In view of problem that the stochastic flow produced by the distributed power accessing to distribution network and load change can cause the possible problem of overload, this paper proposes a bidirectional power flow analysis method based on sequence operations. Firstly, the serialization method is used to describe the random variation of distribution network system that contains the distributed power. Based on that, combined with the circuit state transition model, a comprehensive risk evaluation of remaining available margin probability distribution changes of the positive and negative of the branch due to uncertainty output is made. Example analysis of IEEE-34 node system proves that the method can identify the sensitive and dangerous lines in distribution network accurately, and provide optimized decisions for safe operation of distribution network containing distributed generation effectively.%针对分布式电源接入配电网及负荷变化产生的随机潮流造成可能出现的功率越限问题，提出一种基于序列运算的线路双向潮流分析方法。通过序列化方法描述包含分布式电源的配电网系统随机变化情况；在此基础上结合线路状态转移模型，对不确定性出力导致支路正反两向剩余可用裕度概率分布的变化进行综合风险评判。通过IEEE-34节点算例表明，上述方法能准确识别出配电网中敏感和危险线路，并有效地对含分布式发电的配电网提供安全运行的优化决策。