A solar energy storage system

Abstract

In a solar power generation energy storage system of the present invention, the duty cycle control signal generation circuit calculates the change rate of the output power signal of the photovoltaic array, and one line is used as the control voltage, and the other line is turned on when the change rate changes in reverse, and the relay K1 coil is energized; The duty cycle adjustable circuit converts the corrected controller output voltage signal into a high level for a certain period of time, compares it with the control voltage, and outputs a high level with adjustable duty cycle, which is passed through the NOT gate and the NAND gate respectively. After the logical operation, the CP pulse of the trigger is used; the control pulse compensation circuit converts the controller control pulse into a DC voltage, and then couples it with the load change signal to obtain the corrected controller output voltage signal, which enters the voltage-controlled oscillator generator The wave pulse and the square wave pulse enter the triggers U1 and U2 respectively. Under the control of the CP pulse, the compensated control pulse is output to control the charging or discharging energy of the supercapacitor bank, and the dynamic error of the signal is compensated in time to improve the control accuracy. and real-time.

Description

technical field [0001] The invention relates to the technical field of solar power generation and energy storage, in particular to a solar power generation and energy storage system. Background technique [0002] Since solar power generation is a non-ideal renewable energy source, with the rapid changes in the sunshine environment, angle and temperature, the output energy of the photovoltaic array is not stable, and the generated power is significantly different. Based on this, the current solar energy storage system is equipped with a supercapacitor bank in addition to the photovoltaic array, battery pack, controller, and load. The controller outputs control pulses according to the output energy of the photovoltaic array and the power of the load. Power is supplied to the load by charging or discharging the photovoltaic array, the supercapacitor bank, and the battery pack to ensure the power supply to the load while keeping the battery in an ideal working state and minimizi...

AI Technical Summary

Problems solved by technology

[0004] In view of the above situation, in order to overcome the defects of the prior art, the object of the present invention is to provide a solar power generation energy storage system, which effectively solves the problem that the existing control method is difficult to respond in real time and the control is not accurate enough

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