Capacitor hybrid energy storage based efficient wind-solar-utility power complementary power supply device

Abstract

The invention provides a capacitor hybrid energy storage based efficient wind-solar-utility power complementary power supply system which consists of a wind driven generator 1, a solar battery 2, a utility power interface 3, an AC(alternating current) (DC) (direct current) / DC wind-solar controller 4, an AC / DC buck converter 5, a voltage hybrid capacitor set 6, a DC / AC inverter 7 and a load 8. Based on the principle that the power of the load is obtained by a power supply with higher voltage when two DC power supplies are connected in parallel for supplying power, wind and solar energy can be used to the great extent and utility power can be saved by improving the output voltage of the AC (DC) / DC wind-solar controller and reducing the output voltage of the utility power AC / DC inverter, entering into the capacitor set.

Description

technical field [0001] The invention relates to a wind power generation, photovoltaic power generation, and mains power complementary power supply system based on capacitive hybrid energy storage, in particular to an uninterrupted power supply device that preferentially and efficiently utilizes wind energy and light energy under ultra-wide wind speed and light conditions. Background technique [0002] With the increasingly prominent energy crisis, wind power, photovoltaic power generation and other clean energy power generation technologies are more and more widely used. Due to the natural complementarity of wind and solar resources, wind power and photovoltaic power generation can provide more power resources. The power generation units of the wind and city power complementary power supply system can be independently controlled and can work in coordination. The power supply security and reliability are relatively high. It can provide uninterrupted power for communication fac...

AI Technical Summary

Problems solved by technology

In this patent, when the load is light and the wind is the largest, the load cannot be consumed in time when encountering strong winds such as strong winds. higher than the rated voltage, causing the relevant circuits at both ends of the capacitor 33 in the buck-boost DC / DC converter to be at a very high voltage, and the withstand voltage requirements of the electronic components of the relevant circuits are correspondingly increased, which increases the cost of electronic components; and wind power generation As a result, the blades of the machine will rotate at a high speed, which will intensify the wear of the wind turbine, and even cause a speeding phenomenon in serious cases, causing a safety hazard

[0007] To sum up, the current wind-solar hybrid power supply systems all use large-capacity energy storage devices, which are costly, bulky, and inconvenient to maintain. Battery energy storage devices are heavily polluted and have a short service life; supercapacitor energy storage devices are used The device, its maintenance system and security system are complicated, and the cost is very high

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