摘要
最优潮流研究在配电网规划运行中不可或缺,且在大量分布式能源接入的主动配电网环境下尤为重要。传统的启发式算法在全局最优解和求解速度上均无法满足主动配电网运行要求,而基于线性化的最优潮流方法在高阻抗的配电网中适用性也较弱。基于此,文章建立了基于二阶锥规划(second order cone programming,SOCP)的动态最优潮流模型框架,力图将原非线性规划模型松弛转化为SOCP进行快速求解。首先,给出了基于二阶锥松弛的配电网动态最优潮流基本模型;然后,对主动配电网中各重要参与元素进行相应的线性化建模处理以便高效求解,如主动管理设备、配电网重构、需求响应及综合负荷等;同时,分析了松弛模型和近似等效的准确性。最后,通过3个应用实例验证了该最优潮流模型的松弛准确性和有效性。
Research on optimal power flow is indispensable in distribution network planning and operation. After the integration of distributed energy resource （DER） in the active distribution network, it becomes much more significant. Traditional heuristic algorithms fail to guarantee optimality and may be computationally cumbersome for real time operation in active distribution network. Moreover, the linearization based optimal power flow method is infeasible in distribution network due to the low R/X ratio of distribution lines. A dynamic optimal power flow framework based on second order cone programming （SOCP） was proposed in this paper to transform the original non-linear models to SOCP problems for fast solving. First, the second order conic relaxation （SOCR） based the basic dynamic optimal power flow model was presented. Then some main elements in the active distribution network were modeled via linearization. Those elements included active management devices, distribution network reconfiguration, demand response and comprehensive loads in this study. The accuracy of the relaxed model and approximation means were also analysis. Finally, the proposed second order conic relaxation based dynamic optimal power flow （SOCR-DOPF） was verified feasible by three application examples in active distribution network.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2017年第6期1634-1644,共11页
Proceedings of the CSEE
基金
国家高技术研究发展计划(2014AA051901)
国家自然科学基金项目(51377111)~~
关键词
主动配电网
动态最优潮流
二阶锥松弛
配电网重构
综合负荷
active distribution network
dynamic optimalpower flow （DOPF）
second order conic relaxation （SOCR）
distribution network reconfiguration
comprehensive loads
