Cascade full-bridge direct-current circuit breaker low-voltage equivalent test circuit and detection method thereof

A DC circuit breaker and test circuit technology, which is applied in the field of power electronic devices, can solve problems such as high current rise rate, damage to converter valve equipment, and DC current rise, and achieve the effect of simplifying equivalent conditions and low cost

Active Publication Date: 2015-05-20
STATE GRID CORP OF CHINA +2
View PDF5 Cites 37 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When a bipolar short circuit occurs on the DC side of the flexible DC transmission line, the DC current rises rapidly, and the current rise rate is as high as 3kA/ms, and the rise of th

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
  • Cascade full-bridge direct-current circuit breaker low-voltage equivalent test circuit and detection method thereof
  • Cascade full-bridge direct-current circuit breaker low-voltage equivalent test circuit and detection method thereof
  • Cascade full-bridge direct-current circuit breaker low-voltage equivalent test circuit and detection method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0039] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0040] In order to thoroughly understand the embodiments of the present invention, the detailed structure will be set forth in the following description. Obviously, the practice of the embodiments of the invention is not limited to specific details familiar to those skilled in the art. Preferred embodiments of the present invention are described in detail below, however, the present invention may have other embodiments besides these detailed descriptions.

[0041] refer to image 3 with Figure 4 , image 3 It is the low-voltage equivalent test circuit diagram of the cascaded full-bridge DC circuit breaker of the present invention; Figure 4 for image 3 The internal circuit diagram of the equivalent submodule in . image 3 The low-voltage equivalent test circuit of medium and direct current circuit breakers is divid...

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 cascade full-bridge direct-current circuit breaker low-voltage equivalent test circuit and a detection method thereof. According to the equivalent test circuit and the detection method, the action process of the cascade full-bridge high-voltage direct-current circuit breaker is simulated by utilizing a low-voltage device and a circuit through impedance equivalence according to a current transfer and cut-off process time equivalence principle, the equivalence of two current conversion times of the cascade full-bridge high-voltage direct-current circuit breaker can be realized, so that the requirement for controlling and protecting equipment time sequence can be accurately verified, the quantity of transfer submodules can be different by simplifying the equivalent condition under the condition that the voltage ratio, the current ratio and the impedance ratio satisfy the proportional relation, and the equivalence of the two current conversion times can be realized. According to the equivalent test circuit, the verification for the working principle and secondary control protection device of the cascade full-bridge high-voltage direct-current circuit breaker can be realized by utilizing relatively low cost, and the working process of the high-voltage direct-current circuit breaker can be well reflected.

Description

technical field [0001] The invention relates to a power electronic device, in particular to a low-voltage equivalent test circuit of a cascaded full-bridge DC circuit breaker and a detection method thereof. Background technique [0002] With the development of high-voltage and high-current semiconductor devices and power electronics technology, high-voltage DC transmission technology, flexible DC transmission technology, and DC grid technology have received more and more attention and applications. When a bipolar short circuit occurs on the DC side of the flexible DC transmission line, the DC current rises rapidly, and the current rise rate is as high as 3kA / ms, and the rise of the short-circuit current cannot be effectively prevented by the flexible DC converter valve itself. If no effective measures are taken, it will Cause damage to the diverter valve equipment. The HVDC circuit breaker for flexible DC transmission equipment can cut off the fault current in a short time,...

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
IPC IPC(8): G01R31/327
Inventor 查鲲鹏杨兵建高阳客金坤汤广福
Owner STATE GRID CORP OF CHINA
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