Automatic voltage regulating circuit and method for solar photovoltaic power generation system

Abstract

The invention provides an automatic voltage regulating circuit for a solar photovoltaic power generation system. The circuit comprises an auxiliary power circuit, an input voltage regulating capacitor, a voltage boosting inductor, an insulated gate transistor, a freewheel diode, a first diode, a second diode, a control drive circuit, an output voltage regulating capacitor, a load and a sampling circuit, wherein the voltage boosting inductor is connected with the input voltage regulating capacitor and the insulated gate transistor; the insulated gate transistor is connected with the control drive circuit and the input voltage regulating capacitor; the freewheel diode is connected with the insulated gate transistor; the first diode and the second diode are connected with the insulated gate transistor and the load; the output voltage regulating capacitor is connected with the first diode, the second diode and the freewheel diode; the load is connected with the output voltage regulating capacitor and an acquisition circuit respectively; and the acquisition circuit is connected with the input voltage regulating capacitor, the load, the output voltage regulating capacitor and the control drive circuit. The invention also provides an automatic voltage regulating method for implementing the method. Constant power output and power supply to the load can be realized without support of asinglechip.

Description

technical field [0001] The invention belongs to the technical field of voltage regulation, and particularly relates to an automatic voltage regulation circuit and method for a solar photovoltaic power generation system, that is, it can realize that when the solar photovoltaic power generation system is weak in sunlight and the photovoltaic voltage is low, Provides the function of stabilizing voltage. Background technique [0002] At present, non-renewable energy sources such as coal and oil are decreasing day by day. At the same time, the power industry, which uses coal as the main energy source, has brought serious pollution problems to the environment. All countries in the world are actively looking for and developing new energy sources, and are gradually turning their attention to the research, development and utilization of renewable and clean energy sources. In this context, as a new form of energy, solar energy has been used as a new energy utilization method in recen...

AI Technical Summary

Problems solved by technology

The commonly used voltage regulating controllers generally need the support of single-chip microcomputer or DSP technology to realize, and have the disadvantages of complex circuit structure and large power loss.

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