Photovoltaic under-power output control method

[0054] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be noted that the following embodiments are intended to facilitate the understanding of the present invention, but do not limit it in any way.

[0055] Such as figure 1As shown, a photovoltaic under-power output control method does not require temperature and irradiance sensors, and efficiently utilizes existing hardware resources, and can be portably transplanted into the current photovoltaic system. It is mainly divided into two parts: dp / dv control and constant voltage control. The specific steps are as follows:

[0056] S01, get the current output voltage v of the photovoltaic array pv and the current output current i pv ;

[0057] S02, calculating the value of dp / dv, using dp / dv control to determine the photovoltaic operating voltage range;

[0058] S03, add constant voltage control on the basis of dp / dv control, and determ