METHOD FOR CONTROLLING PHOTOVOLTAIC POWER GENERATION, CONTROL DEVICE, AND PHOTOVOLTAIC POWER GENERATION SYSTEM

Provided in the embodiments of the present invention are a photovoltaic power generation control method, a control device, and a photovoltaic power generation system, relating to the technical field of optoelectronics; when occlusion or component failure occurs, an optimising device in the photovoltaic power generation system can rapidly adjust an output voltage reference value, so that there is no impact on the power generating capacity of the system. The present method is used in a photovoltaic power generation system, the system comprising at least one photovoltaic string and a control device, the photovoltaic string comprising at least one photovoltaic module, each photovoltaic module comprising a photovoltaic unit and an optimising device connected to the photovoltaic unit, and each photovoltaic unit comprising at least one photovoltaic component; the method comprises: the control device periodically sends an output voltage reference value update command to the optimising device of each photovoltaic string; the optimising device of each photovoltaic string receives the output voltage reference value update command and, on the basis of the output voltage reference value update command, updates the output voltage reference value.