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

66kv Arc Suppression Coil Grounding System Based on Remote Automatic Switching of Resistance

An arc suppression coil grounding and automatic switching technology is applied to emergency protection circuit devices, electrical components, circuit devices and other directions for limiting overcurrent/overvoltage, and can solve the problems such as excessive capacitance current of the arc suppression coil grounding system, etc. To achieve the effect of selection and tripping, low investment and strong adaptability

Active Publication Date: 2021-03-12
中国能源建设集团辽宁电力勘测设计院有限公司
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the purpose of the present invention is to provide a 66kV arc suppressing coil grounding system and a single-phase grounding fault processing method based on automatic switching of resistance in different places, so as to solve the problem caused by the excessive capacitance current of the arc suppressing coil grounding system

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
  • 66kv Arc Suppression Coil Grounding System Based on Remote Automatic Switching of Resistance
  • 66kv Arc Suppression Coil Grounding System Based on Remote Automatic Switching of Resistance
  • 66kv Arc Suppression Coil Grounding System Based on Remote Automatic Switching of Resistance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Such as figure 1 As shown, when a single-phase ground fault occurs on the 66kV outgoing line b of the 220kV substation 1, the voltage transformer of the 66kV busbar of the 220kV substation 1 outputs zero-sequence voltage, and the grounding resistance automatic switching controller and the line selection tripping device go through the preset delay Then close the switching switch and put in the grounding resistance. At this time, the fault current amplitude, resistive component, and zero-sequence current all increase significantly. The grounding resistance automatic switching controller and the line selection tripping device collect The current value can accurately select the outgoing line b as the faulty line. In this process, there are no special requirements for the system operation mode, and the line protection of other substations will not malfunction and trip over the level.

Embodiment 2

[0035] Such as figure 1 As shown, when a single-phase ground fault occurs on the 66kV outgoing line B in another 220kV substation 10 connected to the 220kV substation 1 through the 66kV tie line, if the 66kV tie line is in the closing state, the 66kV bus voltage transformer of the 220kV substation 1 outputs Zero-sequence voltage, grounding resistance automatic switching controller and line selection tripping device close the switching switch after a preset delay, and put in the grounding resistance. At this time, the fault current amplitude, resistive component, and zero-sequence current all increase significantly. Large, grounding resistance automatic switching controller and line selection tripping device can select the connection line (outlet line n) as the fault line by collecting the current value of the current transformer of each loop, wherein, the hard pressure plate of the trip outlet corresponding to the exit line n is preferably in the " At this time, the grounding ...

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 66 kV arc suppression coil grounding system based on automatic switching of resistors in different places. The grounding system comprises a 220kV transformer substation and a66kV transformer substation connected through an outgoing line; an outgoing line switch and a current transformer are arranged on each 66 kV outgoing line; a 66 kV bus in the 220 kV transformer substation is further grounded through a switching switch, a grounding transformer and a grounding resistor in sequence; a voltage transformer, a grounding resistor automatic switching controller and a line selection tripping device are further arranged in the 220 kV transformer substation; the voltage transformer is used for monitoring the voltage of the 66 kV bus; and the grounding resistor automaticswitching controller and the line selection tripping device are connected with the current transformer, the voltage transformer, the wire outlet switch and the switching switch separately. By virtueof the 66 kV arc suppression coil grounding system based on automatic switching of resistors in different places, the problem caused by excessive capacitance current can be solved without improving the system arc suppression coil capacity and changing a system neutral point grounding mode.

Description

technical field [0001] The invention relates to the technical field of power system automation, and in particular provides a 66kV arc suppression coil grounding system based on remote automatic switching of resistance. Background technique [0002] The 66kV distribution network generally adopts the neutral point through the arc suppression coil grounding system. In this grounding mode, no matter whether the system uses overhead lines or cable lines, the protection will not trip when a single-phase ground fault occurs, and it can run for two hours with the fault. However, with the continuous development of urban power grid construction, the 66kV cable conversion rate continues to increase, and the capacitive current level of the system increases significantly. However, the arc suppression coil, which plays the role of compensating the capacitive current, cannot be synchronized due to the limitation of the power distribution device area. Capacitance increases, resulting in ins...

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 Patents(China)
IPC IPC(8): H02H9/08
CPCH02H9/08
Inventor 白晶石徐江姜百超刘莉莉王聪颖李响周壮夏春勇杨斌代常会庾思黎姜为元杨媛媛李博商冰洋张旭鹏吕学斌刘兴龙李芳李岩鲍晓鹏杨玉娇
Owner 中国能源建设集团辽宁电力勘测设计院有限公司
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