Wind electricity change paddle UPS system and control method based on super capacitor

Abstract

The invention discloses a wind-electricity variable pitch UPS system based on super-capacitors and the control method thereof. The UPS system comprises a super-capacitor group(10), a charge and discharge circuit(20), a control circuit(30) and a contactor(50). The super-capacitor group(10) is connected with the charge and discharge circuit(20) which is in connection with a DC generatrix(40)through the contactor(50); the control circuit(30), connected with the charge and discharge circuit(20), controls the operation of the charge and discharge circuit(20), and the whole system is connected or not with the DC generatrix(40) through the control of the contactor(50). The UPS system makes use of the control circuit(30) to control energy to flow in two ways between the super-capacitor group(10) and the DC generatrix(40), thus realizing continuous power supply. The UPS system is based on a simple principle and is flexible in structure; meanwhile, the high efficient charge and discharge control strategy can improve energy utilization ratio of the super-capacitor group and reduce installation content and cost of the system, thus greatly improving the technical performance and economic performance of the system.

Description

technical field [0001] The present invention relates to an uninterruptible power supply (UPS) for wind power variable pitch and its control method, especially an uninterruptible power supply composed of supercapacitors used in wind power variable pitch and its control method, specifically a UPS Wind power pitch UPS system based on super capacitor and its control method. Background technique [0002] As we all know, the modern wind turbine technology not only requires the maximum use of wind energy to improve efficiency, but also requires strengthening the safety performance of the entire wind turbine. The variable pitch system, because it can improve the efficiency of capturing wind energy and obtain the best energy output at the rated wind speed, has gradually occupied the dominant position of wind turbines, especially in large wind turbines, and has gained more and more applications. The pitch control system must also protect the wind turbine from being damaged by control...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to design a fast and efficient charging UPS system for a series of problems such as low power density, long charging and discharging time, short service life, large maintenance, and high cost

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