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随着智能电网的不断发展,其中太阳能和风能发电由于其清洁和易于取用的特点,受到了广泛关注。而风力发电、光伏发电、燃料电池、电力电子变换器及其控制装置、储能单元等设备组成的分布式电源系统成为了目前主要的研究方向。本文对分布式发电单元中双级式光伏发电单元、蓄电池储能单元的基本原理和数学模型进行了详细的分析。将蓄电池储能单元和双级式发电单元进行组合构成了新型的光蓄混合发电单元,并对光蓄混合发电单元中蓄电池的充放电过程进行了仿真。仿真结果表明所建立的仿真模型能够真实反应光照和风速的变化,能够适用于智能电网中微电网的研究。
With the continuous development of smart grids, solar power and wind power generation have drawn much attention due to their cleanliness and easy access. However, distributed power systems composed of wind power generation, photovoltaic power generation, fuel cells, power electronic converters and their control devices, energy storage units and other devices have become the main research directions at present. In this paper, the basic principle and mathematical model of two-stage photovoltaic power generation unit and battery energy storage unit in distributed generation unit are analyzed in detail. The battery energy storage unit and the two-stage power generation unit are combined to form a novel optical storage hybrid power generation unit, and the charging and discharging process of the battery in the optical power storage hybrid power generation unit is simulated. The simulation results show that the established simulation model can truly reflect the changes of light and wind speed and can be applied to the research of microgrid in smart grid.