电路非理想参数对光伏系统最大功率追踪的影响

Impact of Non-ideal Circuit Parameters on MPPT in PV Systems

以光伏电池和Boost变换器构成的光伏系统为例,考虑实际电路元件的非理想参数,建立了含Boost变换器光伏系统的精确数学模型,研究了非理想参数对光伏系统最大功率追踪(MPPT)的影响,并通过Simulink仿真及dSPACE试验进行验证。结果表明,当电路中存在非理想参数时,MPPT追踪的占空比和直流母线电压均会受到影响,也有可能会对原电路产生严重影响,甚至导致电路无法正常工作,因此在进行电路设计时一定要考虑电路非理想参数的影响,由此验证了理论分析的正确性。

Taking the PV systems consisting of PV cells and Boost converter as an example,aprecise mathematical model of PV system with Boost converter was established by considering non-ideal parameters of the actual circuit elements.The impact of non-ideal circuit parameters on the MPPT in PV systems was studied.Simulink simulation and dSPACE test were used to verify the effectiveness of the model.The results show that the non-ideal circuit parameters has impact on the duty ratio of MPPT and the voltage of DC bus,possibly affects the original circuits seriously,evenly damages the circuits.Therefore,it needs to consider the impact of non-ideal circuit parameters for circuit design.Finally,the correctness of theoretical analysis is validated.