一种变步长扰动观察法最大功率点跟踪在煤矿采空区光伏发电中的应用研究

Study on Application of a Variable Step Size Disturbance Observation Method for Maximum Power Point Tracking in Photovoltaic Power Generation in Coal Mine Goaf

将光伏发电技术应用在煤矿采空区是提高闲置土地价值的有效手段之一,但如何提高光伏发电的效率则十分重要。分析了定步长扰动观察法最大功率点跟踪的跟踪精度和响应速度存在矛盾的不足,提出了一种变步长扰动观察法,引入了步长调节系数m,通过仿真对比验证了变步长扰动观察法在兼顾最大功率点跟踪响应速度的同时能够明显改善稳态的精度,对于提高煤矿采空区的经济效益有重要意义。

The application of photovoltaic power generation technology in coal mine goaf is one of the effective means to improve the value of idle land.But how to improve the efficiency of photovoltaic power generation is the key.The contradiction between the tracking accuracy and response speed of the fixed-step disturbance observation method for Maximum Power Point Tracking(MPPT)is analyzed,and a disturbance observation method with variable step size is proposed,and the step size adjustment coefficient is introduced.The simulation results show that the variable step size disturbance observation method can significantly improve the steadystate accuracy with the MPPT response speed taken into account,which is of great significance for improving the economic benefits of the coal mine goaf.