Tracking control method for maximum power point of photovoltaic cell
A maximum power point, photovoltaic cell technology, used in photovoltaic power generation, optical radiation generators, control/regulation systems, etc., can solve the problem of fixed tracking step size tracking accuracy and speed cannot be balanced, to improve voltage utilization, eliminate Oscillating, fast-tracking effects
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[0027] A photovoltaic cell maximum power point tracking control method is implemented by the following steps:
[0028] (1) Sampling the photovoltaic cell output voltage U(t) and output current I(t) at time t;
[0029] (2) Calculate the output power P(t)=U(t)*I(t) of the photovoltaic cell at time t, and the output power P(t-1) at time t-1 (that is, the last sampling time), Output voltage U(t-1) and output current I(t-1) are compared, dP(t)=P(t)-P(t-1), dU(t)=U(t)-U(t -1),dI(t)=I(t)-I(t-1);
[0030] (3) When dP(t) / dU(t)>0, the operating point of the photovoltaic cell is on the left side of the maximum power point;
[0031] (i) Calculate the short-circuit current and maximum power point current of the photovoltaic cell at the current moment (at different moments, due to the different temperature and light intensity of the photovoltaic cell, the voltage-current curve of the photovoltaic cell will be different, so the short-circuit current at different moments will be different. ...
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