含分布式电源的交直流配网双层规划研究

随着分布式电源的日益增多,交直流配网的发展势不可挡,文中针对其规划问题提出一种双层规划模型。第一层模型以系统建设成本和运行成本为目标函数,第二层模型使用经济调度细化第一层模型中运行成本的计算,使规划结果更加精确。针对不同的母线类型、支路类型和网络拓扑,提出一种交直流配网的网络编码方式,并嵌套智能算法,求解双层模型。算例采用13节点待规划网络,规划结果表明交直流配网在运行成本、线路建设费用、电压源型换流器(voltage source converter,VSC)安装费用和电源安装成本等方面都优于传统交流配网。

Two-layer Model of AC/DC Distribution Network Containing DGs

With the increasing of distributed generation number,the development of AC/DC distribution network is unstoppable.A two-layer planning model is proposed to handle the planning problem of AC/DC distribution network.The objective functions of the first layer are system construction and operating costs.The second layer calculates the operating costs in detail by economic dispatch,which makes the result more accurate.For different bus types,branch types and network topologies,a binary coding model of AC/DC distribution network is put forward,which can be nested into intelligent algorithm conveniently.A 13-bus case study indicates that AC/DC distribution network is more economical than tradition AC distribution system in operating costs,line construction costs,VSC installation costs and generator installation costs.