Method for tracking maximum power point of solar cell

The invention discloses a method for tracking the maximum power point of a solar cell. The method comprises the following steps: detecting the real-time temperature of a solar cell through a temperature sensor; obtaining a temperature and open-circuit voltage reduction rate curve by obtaining the temperature and the open-circuit voltage of the photovoltaic cell at the corresponding temperature formultiple times, and obtaining an open-circuit voltage reduction rate according to the temperature and open-circuit voltage reduction rate curve; acquiring a real-time open-circuit voltage through formula calculation according to the obtained real-time temperature and the calculated open-circuit voltage reduction rate; obtaining the maximum power voltage at the temperature according to the obtained real-time temperature and the calculated real-time open-circuit voltage; and feeding the obtained maximum power voltage back to a MPPT control module to serve as a current working voltage so as to keep the working voltage a