Research on Variable Step MPPT Strategy for Photovoltaic System
Research on Variable Step MPPT Strategy for Photovoltaic System
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发表时间：
2011
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通讯作者：
Huang Jin
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作者：
Huang Jin
为了提高光伏（PV）器件的发电效率，提出了一种变扰动步长方法，该方法利用P-利用光伏器件输出的U特性曲线点斜率来确定变量扰动步长，同时提高了搜索速度和稳定性，Matlab仿真结果表明，该方法能有效地真实的实时调节光伏器件输出功率，大大提高了光伏器件输出功率的稳定性提高跟踪速度，减小最大功率点附近的振荡，从而降低光伏器件的能量损耗，该系统结构简单，易于推广使用。
For improving the efficiency on power generation of photovoltaic(PV) device,a variable perturb step method was proposed which uses the absolute value of P-U characteristic curve′s points slope of PV device output to determine the variable perturb step and can enhance the search speed and stability at the same time.The Matlab simulation results show that this method can be effective to adjust PV output power in real time.It can greatly improve the tracking speed and reduce the oscillation around the maximum power point(MPP) to lower the engery lost of PV device.This system is simple and easy to promote and use.