风-光-储混合直流微网系统的设计

Design of Wind-Photovoltaic-Storage Hybrid DC Microgrid System

随着我国对能源需求的日益增加,发展新能源变得十分紧迫,新能源发电是新能源最主要的利用形式。然而,光伏、风力等新能源受自然因素影响大,供电十分不稳定。为实现可靠的新能源发电,本文构建了风-光-储混合直流微网系统,采用双母线结构,光伏阵列、风力发电机分别通过Buck变换器和三相桥式PWM(Pulse Width Modulation)整流电路与直流母线相连,蓄电池直接并接在直流母线上。经实验验证,本系统在离网、并网和离/并网切换的条件下都可以实现稳定、连续、可控的新能源供电。

The increasing demand for energy in China makes it urgent to the development of new energy,and new energy generation is the most important form of new energy utilization.However,due to the photovoltaic,wind and other new energy affected by natural factors,the power supply is not stable.In order to achieve reliable new energy power generation,a hybrid wind-Photovoltaic-storage DC microgrid system was constructed in this paper.The system adapt double buses structure.The photovoltaic array and wind generator were connected with the DC bus through Buck converter and three-phase bridge PWM rectifier circuit respectively,and the battery was directly connected with the DC bus.The experimental results verifies that the system can achieve stable,continuous and controllable power supply of new energy under the condition of off-grid,on-grid and off-grid/on-grid switching.