独立光伏发电系统中混合储能系统的优化配置策略

Capacity Optimal Configuration of Hybrid Energy Storage System in Stand-alone PV Systems

太阳能光伏发电作为我国新能源的技术应用,正在蓬勃兴起.由于太阳能间歇性、波动性和不稳定性的缺点,给太阳能光伏发电的应用与推广带来了诸多困难.为提高太阳能光伏发电的可靠性,保证供电质量,必须对太阳能光伏发电进行储能和放电控制,建立独立光伏发电系统,以实现日夜供电.独立光伏发电系统的设计,需要考虑工作环境、工作状态以及工作元件等诸多因素,并建立数学模型.本研究结合蓄电池和超级电容器的充放电特性,合理配置和规划蓄电池和超级电容器的容量数量比,并以储能系统的全寿命周期作为经济目标,建立独立光伏发电系统可靠性指标约束模型.

Solar photovoltaic power generation is a new technology in China’s new energy applications.To rationally and efficiently use solar power,we can establish an independent photovoltaic power gener⁃ation system in the solar energy-rich areas.Because of the intermittent,fluctuating,and unstable na⁃ture of solar energy,in order to improve the reliability of the power supply of the independent power generation system and ensure the quality of the power supply,it is necessary to configure the energy storage system for the power generation system in order to realize the power supply for day and night.In the design of an independent photovoltaic power generation system,a mathematical model is estab⁃lished for the work environment,working conditions,and working elements of an independent photo⁃voltaic power generation system.Combined with the actual storage and discharge characteristics of batteries and supercapacitors,the rational allocation and planning of the capacity of the battery and the supercapacitor ratio.Taking the life cycle of the energy storage system as the economic objective optimization function,then established the constraint model of the reliability index of the power generation system.