Backup power supply system for variable pitch system of large fan

A technology of pitch system and backup power supply, which is applied to collectors, electric vehicles, electrical components, etc., can solve the problem that the pitch system is difficult to monitor the capacity of backup power supply, so as to improve the utilization rate of fans, reduce maintenance costs and time, and improve The effect of surveillance capabilities

Pending Publication Date: 2021-05-14
SHANGHAI DIANJI UNIV
View PDF0 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the wind turbine is running normally, the backup power supply generally does not participate in the pitch operation, and it is difficult for the pitch system to monitor the backup power capacity

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Backup power supply system for variable pitch system of large fan
  • Backup power supply system for variable pitch system of large fan
  • Backup power supply system for variable pitch system of large fan

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0039] Such as figure 1 As shown, a large-scale wind turbine pitch system backup power system adopts five series and three parallel supercapacitor modules, and each module is composed of 36 monomers connected in series. In this embodiment, the rated value of each supercapacitor module The voltage is 90V, the series voltage is 450V, the capacity is 9.6F, the capacity of the entire backup power supply is 5.76F, the voltage is 450V when fully charged, and the working cut-off voltage is 260V. There are main control modules and charging modules respectively connected to the main control modules, The fault warning module and the capacitance test module, the charging module adopts the charging circuit of the charger, which is charged by fast first, then slow, and finally constant voltage. The inverter, the pitch drive and the main power supply contactor KM1 are connected, and the capacitor failure judgment calculation is performed on the capacity of the backup power supply.

[0040]...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a backup power supply system for a variable pitch system of a large fan. The system adopts five-series and three-parallel super capacitor modules, each module is formed by connecting 36 single bodies in series, the backup power supply system is provided with a main control module, and a charging module, a fault early warning module and a capacitance test module which are respectively connected with the main control module, the charging module adopts a charger charging loop, charging is carried out in a fast-to-slow and finally constant-voltage mode, the fault early warning module carries out overvoltage detection on each single body, and the capacitance testing module is connected with a variable-pitch controller, a variable-pitch driver and a main power supply contactor and carries out capacitance failure judgment calculation on the capacity of a backup power supply. Compared with like systems in the prior art, the system of the invention has the advantages of improving the utilization rate of the fan, reducing the maintenance cost and time, improving the capacity monitoring capability of the back-up power supply of the variable pitch system, improving the safety of the wind turbine generator and the like.

Description

technical field [0001] The invention relates to the field of back-up power supply for fan pitch systems, in particular to a back-up power supply system for large-scale fan pitch systems. Background technique [0002] The pitch control system is one of the core control systems of the wind turbine as the actuator for the wind turbine pitch operation. On the one hand, it executes the control commands from the main controller, adjusts the blade angle, and completes the control of the impeller speed and power of the fan. On the other hand, in the event of an emergency, the pitch control system can perform a feathering action to close the blades to the feathered position to ensure the safety of the wind turbine, which is an important barrier for the safe operation of the wind turbine. Considering the importance of the pitch system to the safe operation of wind turbines, usually, the pitch system will be equipped with a backup power supply. When the grid power supply of the pitch ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00
CPCH02J7/0013H02J7/0047H02J7/345
Inventor 张智禹王鸿王致杰王昊刘家文奚晓彪曹荣斌
Owner SHANGHAI DIANJI UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap