Automatic tuning and small current grounding failure wire selection system of 8421 parallel reactor composite extinction coil

A technology of small current grounding and arc suppression coils, applied in the direction of inductors, fault locations, variable inductors, etc., can solve the problems of harmonic generation, high cost, inoperability, and poor arc suppression effect, etc., and achieve cost reduction Effect

Active Publication Date: 2008-05-28
北京丹华昊博电力科技有限公司
View PDF3 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these arc suppressing coils have been improved in some aspects, they also have certain problems. The speed is slow, it cannot run at the full compensation point and other shortcomings, and the arc suppression effect is poor
Other arc suppression coils also have problems such as complex structure, harmonic generation and high cost
In addition, the problem of line selection for permanent ground faults has not been well resolved so far

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
  • Automatic tuning and small current grounding failure wire selection system of 8421 parallel reactor composite extinction coil
  • Automatic tuning and small current grounding failure wire selection system of 8421 parallel reactor composite extinction coil
  • Automatic tuning and small current grounding failure wire selection system of 8421 parallel reactor composite extinction coil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] 8421 shunt reactor combined arc suppression coil primary equipment structure as attached figure 1 shown. L, L1, L2, L3, and L4 are five shunt reactors, and the L reactor is used as the basic capacity, which is always put into the system. In addition, the reactive capacity of the four reactors L1, L2, L3, and L4 is calculated according to 1:2:4: 8 for distribution. k1, k2, k3, and k4 are vacuum high-voltage contactors, which are respectively connected to the system in series with the reactor, so that the switching control of the reactor can be realized by operating the vacuum high-voltage contactor, and b1, b2, b3, and b4 are four lightning arrester. There are sixteen combinations of four reactors, which can form 16 evenly distributed reactor capacities.

[0021] When the system is running normally, the four vacuum high-voltage contactors are closed, and the reactors are all put into operation. The system operates in the over-compensation mode, away from the resonance...

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

A line selecting system for automatic tuning if arc quenching coil in 8421 parallel reactor integrated type and earthing fault of small current includes is prepared as forming said system by five reactors with one being used always as basic volume and the other four being used in rated value, connecting each of said four reactors to a vacuum high voltage contactor to form sixteen uniform volume of reactor, operating system on over - compensation mode with said four reactors on operation and operating system on full - compensation mode to ensure arc quenching by switching on or off reactor in optimum way when single phase earthing fault is existed on system.

Description

Technical field: [0001] The invention is mainly applied to the neutral point grounding system of the 66kV and below power grid through the arc-suppressing coil. When a single-phase grounding occurs in the power grid, the system can automatically and quickly extinguish the arc and automatically select the grounding fault line. technical background: [0002] In the past, the 3-66kV power system usually used the neutral point ungrounded method. In recent years, with the development of the economy, the scale of the power system has expanded, the length of the lines in the system has increased, and the power cables have increased and lengthened, making the ground capacitance of the power grid The current rises sharply, and the capacitance current value is getting larger and larger, and the capacitance current of many systems has reached more than 50A. When a single-phase ground fault occurs in the neutral point ungrounded power grid, the arc at the fault point may not be effectiv...

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): G01R31/08H02H3/16H02H9/08H02H7/04H01F29/00
Inventor 杨以涵李砚齐郑
Owner 北京丹华昊博电力科技有限公司
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