Solar power generation and energy storage system

Abstract

According to a solar power generation and energy storage system, a duty ratio control signal generation circuit calculates the change rate of output power signals of a photovoltaic array, one path serves as control voltage, and when the change rate of the other path changes reversely, a coil of a relay K1 is powered on; a duty ratio adjustable circuit converts the corrected output voltage signal of the controller into a high level with a certain time length, compares the high level with a control voltage, outputs the high level with an adjustable duty ratio, and performs logic operation through a NOT gate and an NAND gate to serve as CP pulses of a trigger; the control pulse compensation circuit converts controller control pulses into direct-current voltages, the direct-current voltages are coupled with load variation signals to obtain corrected controller output voltage signals, the corrected controller output voltage signals enter the voltage-controlled oscillator to generate square-wave pulses, the square-wave pulses enter the triggers U1 and U2 respectively, and compensated control pulses are output under the control of CP pulses. And the charging or discharging energy of the super capacitor bank is controlled, the dynamic error of the signal is compensated in time, and the control precision and real-time performance are improved.

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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