Low-voltage ride through circuit of double-feed type wind power generator

A technology for wind power generators and low-voltage ride-through, which is applied to wind power generation, control of generators, electrical components, etc., and can solve problems such as inability to fully protect and increase the capacity of converters

Inactive Publication Date: 2011-04-06
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
View PDF10 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above two methods can play a certain role, but still have the following deficiencies: 1. The current fault protection circuit needs to trigger the corresponding circuit to protect after detecting the fault signal, so it has a certain delay and cannot play a role. The role of complete protection
2. Adopting an improved control method needs to increase the capacity of the converter, and there is nothing that can be done when the voltage drops deeply

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
  • Low-voltage ride through circuit of double-feed type wind power generator
  • Low-voltage ride through circuit of double-feed type wind power generator
  • Low-voltage ride through circuit of double-feed type wind power generator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] image 3 This is the topology structure of Embodiment 1 of the present invention. like image 3 As shown, the structure of Embodiment 1 of the present invention is as follows: the first switch S1, the second switch S2, the third switch S3, the fourth switch S4, the fifth switch S5 and the sixth switch S6 form the first current source converter CSC1 The anode of the first switch S1 is connected to the cathode of the second switch S2 to form the first AC connection point PA1; the anode of the third switch S3 is connected to the cathode of the fourth switch S4 to form the second AC connection point PA2; the fifth switch The anode of S5 is connected to the cathode of the sixth switch S6 to form the third AC connection point PA3; the cathodes of the first switch S1, the third switch S3 and the fifth switch S5 are connected together to form the first DC connection point PD1; The anodes of the second switch S2, the fourth switch S4 and the sixth switch S6 are connected toget...

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 low-voltage ride through circuit of a double-feed type wind power generator, which utilizes a superconducting magnet as an energy storing core. A superconducting magnet is charged and discharged, active power provided by a double-feed type wind power generator is adjusted in a normal state, and the active power provided by the wind power generator is smoothed, thereby improving the electric energy quality of wind power generation, reducing influence to a power grid and compensating the fluctuation of the active power output by a wind power generating system. When the voltage of the power grid is abnormal, a compensating voltage is connected in series between the power grid and a stator of the double-feed type wind power generator through a transformer and a current source inverter circuit, therefore, the voltage of the stator end of the double-feed type wind power generator maintains a normal state, the wind power generating system can be still run online when the wind power generating system generates voltage temporary reduction, and thereby the low-voltage ride through requirement of a power system on the wind power generator is met.

Description

technical field [0001] The invention relates to a low-voltage ride-through circuit of a double-fed wind power generator. Background technique [0002] Wind power is developing rapidly around the world, and its proportion in the power grid is gradually increasing. As the proportion of wind power in the power grid continues to increase, the impact of wind power on power grid stability and power quality is increasing. In order to reduce the impact of wind power generation on the power grid, countries around the world have gradually introduced grid-connected standards for wind power generation, one of which is to require wind turbines to exit the power grid when they meet certain requirements at low voltage. In order to meet the requirements of low-voltage grid connection, various low-voltage ride-through technologies are gradually developed. Various low-voltage ride-through technologies are mainly divided into two types: 1. Adopt fault protection circuit. like figure 1 As s...

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): H02P9/00H02P9/10H02J3/38
CPCY02E10/763Y02E10/76
Inventor 郭文勇肖立业戴少涛张志丰
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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