含分布式电源的交直流混合配电网动态重构模型

Dynamic Reconfiguration Model of AC-DC Hybrid Distribution Network with Distributed Power Generation

直流配电网的发展为直流电源和负载提供更高效接入方式的同时,也使配电网在运行中呈现出交直流混合的拓扑形式。为适应这种变化,考虑交直流配电网重构中可能出现的混合结构,建立了统一的稳态潮流模型。为了保证网络辐射特征,建立了基于有功潮流方程的充要约束条件,进而提出含分布式电源的交直流混合配电网动态重构模型。该模型以购电成本、网损成本、分布式电源发电成本之和最小为目标函数,可基于泰勒级数和分段线性化技术将原模型转化为能有效求解的混合整数线性规划问题。最后通过一个包含不同类型分布式电源的改进50节点算例验证了所提模型的有效性。

The development of DC distribution systems(DSs)not only provides more efficient way for the access of DC generation and load.but also makes DSs form an AC-DC hybrid topology.In order to adapt to this change,a uniform steady state power flow model is established by considering the possible hybrid structures in AC-DC DSs.In order to en-sure the characteristics of network radiation,a necessary and sufficient constraint condition based on the active current e-quation is established,and a dynamic reconfiguration model of the AC-DC hybrid distribution network with distributed power generation is proposed.This model takes the minimum sum of power purchase cost.network loss cost and distrib-uted power generation cost as the objective function,which can be transformed into a mixed integer linear prog ramming problem(MILP)based on Taylor series and piecewise linearization that can be effectively solved.Finally,the effective-ness of the proposed model is verified by an improved 50-bus example containing different types of distributed power gen-eration.