A two-stage balance circuit for supercapacitor modules

Abstract

The invention discloses a two-level-type balancing circuit for a supper capacitor module. The circuit comprises a bleed-off sampling circuit unit, a bleed-off comparison circuit unit, a bleed-off switch circuit unit, a bleed-off circuit unit and an alarming circuit unit. When the voltage values of super capacitors exceed the specified value, the bleed-off circuit unit conducts bleed-off on the over-voltages of the supper capacitors. When the bleed-off is carried out and the voltages of the supper capacitors still exceed the specified value, the alarming circuit unit externally sends out an alarm signal. According to the two-level-type balancing circuit for the supper capacitor module, the voltage value of each super capacitor can be accurately controlled, the energy consumption of a system is reduced, the problem of error alarming in the prior art when the voltage reaches the specified value is solved, and therefore the maintenance cost of the wind power generation system is reduced.

Description

technical field [0001] The invention relates to a two-stage balance circuit, in particular to a two-stage balance circuit used for a supercapacitor module. Background technique [0002] During the operation of the wind turbine, when the wind speed, wind direction, etc. change, it is necessary to change the pitch angle and other parameters through the pitch control system to ensure the optimal and safe operation of the system. Among them, wind power generation refers to the use of wind power to drive the windmill blades to rotate, and then through the speed increaser to increase the speed of rotation to promote the generator to generate electricity. The pitch system refers to a set of control systems used to control the angle of the blades (blades) of the windmill to achieve the purpose of controlling the output power of the windmill or stopping it. The pitch system needs to be powered by an energy storage module. At present, the mainstream energy storage modules include ba...

AI Technical Summary

Problems solved by technology

[0006] The disadvantage of the above solution is that once the voltage of the supercapacitor exceeds the specified value, it will cause an overvoltage alarm in the system, which requires human intervention to judge

Wind farms are usually designed in places with harsh environments. If there is a false alarm, it needs to be inspected manually. The pitch system is installed at a height of about 100 meters above the ground. Inspection is extremely inconvenient and expensive

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