Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Arc extinguishing cabinet and low current grounding system

A technology of small current grounding and arc suppression cabinets, which is applied in the direction of grounding devices, emergency protection circuit devices for limiting overcurrent/overvoltage, electrical components, etc., and can solve problems such as power equipment burnout, equipment hazards, and power system resonance , to achieve the effect of suppressing the amplitude, ensuring safe and stable operation, and suppressing arc discharge

Pending Publication Date: 2019-12-03
BEIJING HUADIAN RUITONG POWER ENG TECH
View PDF0 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And in the grounding wire, nearly 3 times the relative ground capacitance current during normal operation is generated, and the resulting ampere force (ampere force F=BILsinθ) makes the wire swing from side to side and is accompanied by intermittent arc discharge, causing damage to the surrounding people and equipment. If it lasts for a long time, it will cause resonance in the power system, causing safety accidents such as burning of power equipment and expanding power outages

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
  • Arc extinguishing cabinet and low current grounding system
  • Arc extinguishing cabinet and low current grounding system
  • Arc extinguishing cabinet and low current grounding system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0042]The embodiment of the present application provides an arc suppression cabinet, which is applied to a small current grounding system. The small current grounding system includes a main incoming line cabinet 20 connected in parallel with a bus 40 and a plurality of feeder cabinets 30; the arc suppression cabinet 10 Including: switching device 13 and small current grounding line selection device 14; wherein, such as figure 1 As shown, the arc suppression cabinet 10 includes: a sw...

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 an arc extinguishing cabinet and a low current grounding system. The arc extinguishing cabinet is provided with a switching device and a low current grounding line selection device. The low current grounding line selection device is used for performing insulating monitoring and sampling of the three-phase voltage collected by a first voltage transformer group through a first input end and sampling the zero sequence current of a total incoming line cabinet through a second input end; and determining the fault phase and the fault type and controlling the switching deviceto switch the resistive load on the branch corresponding to the fault according to the voltage exceeding the first preset value and / or the zero sequence current exceeding the second preset value whenany one of the three-phase voltages exceeds the first preset value and / or the zero sequence current exceeds the second preset value so that the resistive load is switched on the the branch corresponding to the fault when the single-phase grounding fault occurs, the grounding current becomes resistive-capacitive grounding current, the amplitude of the power grid overvoltage can be suppressed and the purpose of suppressing the arc discharge generated by the single-phase grounding fault point and ensuring the safe and stable operation of the power system.

Description

technical field [0001] The present application relates to the technical field of power equipment, and more specifically, to an arc suppression cabinet and a small current grounding system. Background technique [0002] At present, in my country's 10kV and other medium-voltage distribution networks, in order to improve the power supply reliability of the power system, most distribution networks are small-current grounding systems. Impedance grounded three-phase system, also known as neutral point indirect grounding system. When a ground fault occurs in a certain phase, since a short circuit cannot be formed, the ground fault current is often much smaller than the load current, so this system is called "small current grounding system". [0003] In the low-current grounding system, when a single-phase reliable grounding fault occurs on the high-voltage side, only the fault phase voltage on the high-voltage side is 0V, and a lower induced voltage will be generated on the phase l...

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): H02H9/08H02B1/16H02H7/26
CPCH02H9/08H02B1/16H02H7/262H02H7/263
Inventor 于海波钮晓东张峰
Owner BEIJING HUADIAN RUITONG POWER ENG TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com