Method and device for measuring generating power of photovoltaic modules

The invention provides a method and device for measuring generating power of photovoltaic modules. The method includes: measuring voltage and temperature of a photovoltaic module and measuring total irradiance of a current horizontal plane; acquiring standard equipment information of the photovoltaic module; acquiring coefficients, including current temperature coefficient, irradiance coefficient and voltage temperature coefficient, of the photovoltaic module; determining equipment information of the photovoltaic module according to the temperature, total irradiance, standard equipment information, and coefficients; determining a coefficient of a voltage-current relation curve of the photovoltaic module according to the equipment information of the photovoltaic module; determining generating power of the photovoltaic module according to the coefficient of the voltage and voltage-current relation curve of the photovoltaic module. Through the use of the method and device, the generating power of the photovoltaic module is acquired according to the temperature and irradiance information acquired in real time and prediction precision is improved.