Device for limiting peak value and rate of rise of transient recovery voltage of circuit breaker

A technology of transient recovery voltage and circuit breaker, which is applied in the direction of emergency protection circuit device, circuit device, emergency protection circuit device, etc. for limiting overcurrent/overvoltage, and can solve the problem of inability to limit recovery voltage peak value and circuit breaker transient Problems such as high recovery voltage rise rate and limited limiting effect

Inactive Publication Date: 2010-06-09
NORTHWEST CHINA GRID +1
View PDF0 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The fracture of some AC high voltage circuit breakers is connected in parallel with capacitors with small capacitance. The main function is to improve the voltage distribution of the circuit breaker fracture. Although it can also play a role in limiting the recovery voltage rise rate of the circuit breaker, the limiting effect is very limited.
Under certain requirements, some circuit breakers are connected in parallel with thousands of pF capacitors to limit RRRV, but cannot limit the peak recovery voltage
[0008] In 750kV and UHV systems, under certain faul

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
  • Device for limiting peak value and rate of rise of transient recovery voltage of circuit breaker
  • Device for limiting peak value and rate of rise of transient recovery voltage of circuit breaker
  • Device for limiting peak value and rate of rise of transient recovery voltage of circuit breaker

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] The schematic diagram of the device for limiting the transient recovery voltage of the circuit breaker proposed by the present invention is as follows figure 2 shown in the dotted box.

[0024] In order to limit the peak value and rising rate of the transient recovery voltage of a typical 750kV system circuit breaker, the capacitance value of the capacitor of the device of the present invention is designed to be 10000pF, and the rated voltage of the arrester is 972kV.

[0025] In order to select the capacitance value of the capacitor, the Power Electronics and Electromagnetic Transient Calculation Program (EMTPE) version 1.0 developed by the Electric Power System Research Institute of the China Electric Power Research Institute was used to calculate the transient recovery of the circuit breaker when a short-circuit fault occurs in the system when different capacitance values ​​are used. The rate of rise of the voltage is shown in Table 2. When the capacitance value is...

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 device for limiting a peak value and the rate of rise of transient recovery voltage of a circuit breaker, which not only can limit the rate of rise of the transient recovery voltage of the circuit breaker, but also can limit the peak value of the transient recovery voltage of the circuit breaker. In the device of the invention, the two ends of the circuit breaker are connected in parallel with a capacitor and a lightning protector so as to limit the transient recovery voltage of the circuit breaker; the capacitor is connected in parallel so as to limit the rate of rise of the transient recovery voltage of the circuit breaker; and the lightning protector is connected in parallel to the two ends of the circuit breaker can limit the peak value of the transient recovery voltage of the circuit breaker.

Description

technical field [0001] The invention relates to the field of electric power system electronic devices, in particular to a device for limiting the rising rate and peak value of the transient recovery voltage of a circuit breaker. Background technique [0002] In 750kV and UHV power grids, circuit breakers are one of the most important and most difficult equipment to manufacture. How to improve the breaking capacity of circuit breakers is very important for the safe and reliable operation of 750kV and UHV systems. [0003] The transient recovery voltage of a circuit breaker is an important indicator of the breaking capacity of a circuit breaker. A large number of research and experimental analysis show that. The rising rate and peak value of the transient recovery voltage TRV are the most important factors affecting the opening of the circuit breaker. [0004] When a short-circuit fault occurs in the line, a short-circuit current will flow through the circuit breaker and ot...

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): H02H9/04
Inventor 班连庚丁彬项祖涛孙强韩彬朱岸明郑彬黄宗君宋瑞华邢琳王晓彤
Owner NORTHWEST CHINA GRID
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