虚拟电厂配电网复杂网络的能效分析研究

Study on energy efficiency analysis of complex network of distribution network in virtual power plant

电力系统的发展趋势已逐步向分布式能源(DES)靠拢,作为聚合众多分布式电源的方式之一,虚拟电厂(VPP)具有重要的研究价值。研究VPP在电网中的可观性与可测性,可提高VPP友好交互性,为其大规模接入电网奠定基础。因此,文中对含VPP的配电网进行复杂网络建模,用复杂网络理论中的平均路径指标来评估含VPP配电网的输电能效,并在实际69节点的配电网拓扑结构下,对有权值与无权值两种情况的能效指标进行分析,研究了VPP与配电网的接口和配电网中VPP的数量变化对能效指标的影响。并进一步分析了微网与虚拟电厂同时接入配电网不同节点时平均路径的变化情况。

Distributed energy(DES)is a major trend of power system in many countries.As one of the important ways to aggregate various types of distributed power sources,virtual power plants(VPP)have important research value.The study of the observability and testability of VPP in the power grid can improve the friendly interaction of VPP and lay a foundation for its large-scale access to the power grid.Therefore,this paper conducts complex network modeling for distribution network with VPP,evaluates the transmission efficiency index of distribution network with VPP based on the average path in complex network theory,and analyzes energy efficiency indicators of the rights and non-weights under the actual 69-node distribution network topology.The impact of the virtual power plant and distribution network interface and the number of virtual power plants in the distribution network on the indicators is analyzed.Moreover,this paper also compares the changes of the average path when the microgrid and the virtual power plants are simultaneously connected to different nodes of the distribution network.