Maximal power point tracking control method for single-phase single-stage photovoltaic inverter
A maximum power point, photovoltaic inverter technology, applied in photovoltaic power generation, photovoltaic modules, output power conversion devices, etc., can solve problems such as optimal control of the DC voltage set value extreme value, and achieve optimal steady-state and dynamic Performance, ease of implementation, and low computational cost
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[0028] The following is a detailed description with reference to the drawings, but not as a limitation of the present invention.
[0029] (1) Characteristic curve of photovoltaic cell
[0030] Under different light intensity and ambient temperature, the output current-voltage of photovoltaic cells presents nonlinear characteristics, and the current-voltage characteristic equation is
[0031] I PV = I ph - I o ( exp ( q U PV AkT ) - 1 ) - - - ( 1 )
[0032] Where U PV , I PV Are the output voltage and current of the photovoltaic cell array, Iph is the photogenerated current, Io is the diode saturation current, q is the charge, A is the diode factor, k is the Boltzmann constant, and T is the photovoltaic cell temperature.
[0033] According to formula (1), the current-voltage (I-V) and power-voltage (P-V) characteristic curves of the photovoltaic cell array are as shown in the figure figure 1 Shown.
[0034] From fig...
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