Photovoltaic power generation control system

Abstract

The invention relates to a string photovoltaic power generation control system which comprises a system main controller and at least two photovoltaic DC (direct current) modules, wherein each photovoltaic DC module comprises a solar cell module, a photovoltaic slave controller and a storage battery module; the photovoltaic slave controller is used for tracking the maximum power point of the solar cell module and charging and discharging the storage battery module through the DC voltage output by the solar cell module; at least two storage battery modules are in string connection so as to output a high-voltage DC voltage; the system main controller comprises a control unit and an inverter unit; and the control unit is used for controlling the inverter unit to invert the high-voltage DC voltage, monitoring each photovoltaic DC module in real time and switching the abnormal solar cell module and / or the storage battery module in real time. By utilizing the technical scheme provided by the invention, a plurality of photovoltaic DC modules are in string connection to form a high-voltage DC power supply, so that the DC / AC (alternating current) inversion can be directly carried out, the traditional boosting transformer is omitted, and the energy conversion efficiency of the photovoltaic power generation system is improved.

Description

technical field [0001] The present invention relates to the technical field of solar energy, and more specifically, relates to a photovoltaic power generation control system. Background technique [0002] Solar energy is inexhaustible and inexhaustible, and it is an ideal energy source for human beings. As early as more than 100 years ago, Einstein discovered the photoelectric effect, which provided a theoretical basis for human beings to use solar energy. In 1954, Bell Laboratories of the United States developed a monocrystalline silicon solar cell with a photoelectric conversion efficiency of 4.5%, making the human dream of directly using solar energy to generate electricity a reality. Since entering the 21st century, the United States, Japan, Germany, etc. have formulated support policies and development plans, and the photovoltaic industry has shown a booming situation. The rapid development of the photovoltaic industry is rare in modern industries, even surpassing the...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a photovoltaic power generation control system with high efficiency and simple structure in view of the defects of low efficiency and complex structure of the photovoltaic power generation control system in the prior art

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