Multi-gear transformer type voltage drop device

A voltage drop and transformer technology, applied in the field of testing, can solve problems such as fixed voltage drop depth, large voltage and current peaks, and difficulty in meeting the requirements of actual testing, and achieve simple and convenient operation, meet grid-connected requirements, and high reliability Effect

Inactive Publication Date: 2013-09-04
HUNAN UNIV OF TECH +2
View PDF6 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its main disadvantage is that most of the switches connected to the transformer are contactors and relays, which will generate large voltage and current peaks, which is very unfavorable to the system under test; and the voltage drop depth is fixed, which is difficult to meet the requirements of actual testing

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
  • Multi-gear transformer type voltage drop device
  • Multi-gear transformer type voltage drop device
  • Multi-gear transformer type voltage drop device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0040] see figure 1 , which is a structural diagram of the first embodiment of the multi-level transformer-type voltage drop device provided by the present invention.

[0041] The multi-level transformer-type voltage drop device provided in this embodiment includes: a voltage drop device (103), a signal measurement module (111), and a protection module (112);

[0042] The device under test (104) is a wind turbine;

[0043] The primary side (input end) of the voltage dropper (103) is connected to the power supply grid (101) through a circuit breaker (102), and the

[0044] The secondary side (output end) of the voltage dropper (103) is connected to the stator of the wind turbine of the device under test (104);

[0045] The signal measurement module (111) is used to collect electrical parameters of the primary and secondary sides of the voltage drop device (103);

[0046] The protection module (112), according to the signal from the signal measurement module (111), is used t...

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 discloses a multi-gear transformer type voltage drop device which comprises a voltage drop device, a signal measuring module and a device protective module. The voltage drop device comprises a primary side controlled current source, a secondary side controlled current source, a primary side field winding, a secondary side field winding, a drop characteristic setting module, a three-phase impedance calculation module and a three-phase current calculation module. The primary side controlled current source is connected with voltage of power supply grid through a breaker, the secondary side controlled current source is connected with the input end of a tested device, the drop characteristic setting module is used for setting the voltage drop depth, a failure type, the drop speed and the drop time, the three-phase impedance calculation module is used for calculating impedance of a transformer three-phase winding, the three-phase current calculation module is used for calculating the current of the transformer three-phase winding, electrical parameters collected by the signal measuring module are sent to the device protective module, and the signal measuring module is used for protecting the device against the possibly-occuring faults. The multi-gear transformer type voltage drop device can simulate voltage drop experiments with different depths under various faults, and meet the penetrating testing requirements of low voltage of a wind motor set.

Description

technical field [0001] The invention relates to the technical field of testing, in particular to a multi-level transformer-type voltage drop device suitable for wind power low-voltage ride-through testing. Background technique [0002] The voltage drop device is widely used in the low voltage ride-through test of wind power. When the power grid fails and the voltage at the grid-connected point of the wind farm drops, within the range of the voltage drop, the wind turbine can run uninterruptedly connected to the grid. [0003] According to the national standard wind turbine needs to meet the low voltage ride through capability, before the wind turbine leaves the factory or is connected to the grid, the low voltage ride through test must be carried out to judge whether it meets the requirements. Therefore, it is necessary to develop a voltage drop device as a test method. [0004] At present, domestic transformer-type wind power voltage drop devices are implemented in two form...

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): G01R31/34
Inventor 李军军贺正芸朱广辉任利滔张满生姜建伟张松科周亚星
Owner HUNAN UNIV OF TECH
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