计及负荷时变性及分布式电源出力波动性的配电网两级实时重构  

Two-Stage Real-Time Reconfiguration of Distribution Network Considering Time-Variance of Load and Output Fluctuation of Network-Connected Distributed Generation

作　　者：高山山[1] 秦文萍[1] 韩肖清[1] 王鹏[1] 王海明[1] 

机构地区：[1]太原理工大学电气与动力工程学院,山西省太原市030024

出　　处：《电网技术》2014年第11期3260-3265,共6页Power System Technology

基　　金：山西省科技攻关项目(20120321005-02;20130321027-01);山西省高等学校中青年拔尖创新人才支持计划

摘　　要：针对分布式电源(distributed generation,DG)接入配电网的特点提出两级实时重构的概念。两级实时重构是指正常运行方式下的最大概率重构(maximum probability reconfiguration,MPR),以及当DG出力或者负荷出现较大波动时,网络拓扑快速响应为实时重构(r e a l-t i m ereconfiguration,RTR)的运行方式。所提两级实时重构模型及方法重点考虑了DG出力和负荷的时变性、负荷的静态电压特性以及配电网的三相不平衡特性。文中比较了4种配电网重构方式的网损和网损率:始终维持原始拓扑结构、15 min实时重构、两级实时重构以及系统在额定负荷和额定DG出力水平下的最优重构。改进的IEEE 16节点和IEEE 34节点配电系统的仿真分析表明,所提的两级实时重构方法不仅能有效降低系统网损,同时提高了系统运行的安全性和可靠性。Based on the features of network-connected distributed generation（DG） a concept of two-stage real-time reconfiguration of distribution network is proposed.The proposed two-stage real-time reconfiguration means the network reconfiguration under two kinds of operating modes,one is the maximum probability reconfiguration（MPR） under normal operating mode and the other is the real-time reconfiguration（RTR） resulted as the fast response of network topology under obvious fluctuation of load or DG output.The method and the model of two-stage real-time reconfiguration of distribution network,in which the time-variance of load and DG output,the static voltage characteristic of load and the three-phase imbalance of distribution network are emphatically considered,are put forward.The network loss and network loss rate under four kinds of reconfiguration modes of distribution network,namely always maintaining the original topological structure,the RTR in each time interval of 15 minutes,the two-stage RTR and the optimized reconfiguration of distribution network under rated load and rated DG output level,are compared.Simulation results of modified IEEE 16-bus system and IEEE 34-bus system show that using the proposed two-stage RTR method not only the distribution network loss can be effectively reduced,but also both security and reliability of distribution network can be enhanced.

关 键 词：不平衡配电网 两级实时重构 时变性 DG出力波动 最大概率重构(MPR) 

分 类 号：TM721[电气工程—电力系统及自动化]