含高渗透率光伏发电的直流配电网协调控制研究

Research on coordinated control of DC distribution network with high permeability photovoltaic generation

文章针对含高渗透率光伏发电的直流配电网的协调控制策略开展研究。首先,对直流配电网的架构及其三层协调控制体系进行了介绍;然后,针对基于传统模式切换的光伏发电对直流配电网直流母线电压支撑能力的不足,通过研究MPPT和直流电压控制内在的一致性,设计了光伏发电MPPT-直流电压控制统一运行控制策略及直流配电网的无模式切换协调控制策略;最后,在Matlab/Simulink中建立了含高渗透率光伏发电、储能和负荷的直流配电网数学模型,验证了上述控制策略的有效性。

In this paper, the coordinated control strategy of DC distribution network with high permeability photovoltaic power generation is studied. Firstly, the structure of DC distribution network and its three-tier coordinated control system are introduced. Secondly, in view of the deficiency of traditional mode switching photovoltaic power generation on DC bus voltage support capability of DC distribution network, MP is studied. Based on the inherent consistency of PT and DC voltage control, a unified operation control strategy of MPPT-DC voltage control for photovoltaic power generation is designed. On this basis, a coordinated control strategy of DC distribution network without mode switching is designed. Finally, a DC distribution network with high permeability photovoltaic power generation, energy storage and load is established in Matlab/Simulink. The mathematical model validates the effectiveness of the above control strategy.