HHT (Hilbert-Huang transform)-based microcomputer small-current earth-fault line selection device

A technology of low-current grounding and line selection device, applied in the fault location and other directions, can solve the problems that restrict the development of distribution network automation and have not been well solved, and achieve easy implementation, meet the requirements of automation use, and achieve good implementation effects. Effect

Inactive Publication Date: 2015-04-15
ANHUI KAICHUAN POWER PROTECTION EQUIP
View PDF2 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This problem has not been well solved for a long time, restricting the development of distribution network automation

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
  • HHT (Hilbert-Huang transform)-based microcomputer small-current earth-fault line selection device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] The content of the present invention will be described below in conjunction with specific embodiments.

[0013] Such as figure 1 As shown, it is a schematic diagram of the installation structure of the small current grounding line selection device of the present invention. The line selection device of the present invention includes: a microcomputer 2, several zero-sequence transformers 3, and the zero-sequence transformer 3 includes figure 1 T1, T2, T3, T4, T5...Tn in Tn are connected in parallel with each other. The microcomputer 2 is provided with a serial communication interface, and the zero-sequence transformer 3 is connected with the microcomputer 2 through the serial communication interface.

[0014] A voltage transformer 1 is connected to the bus, and the voltage transformer 1 is connected to the open triangle on the microcomputer 2 to obtain its zero-sequence voltage. The zero-sequence transformer 3 is connected to the outgoing line of the bus bar to obtain ...

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 relates to an HHT (Hilbert-Huang transform)-based microcomputer small-current earth-fault line selection device which is serially connected with a voltage transformer and then connected to a busbar outgoing line. The line selection device comprises a microcomputer and a plurality of zero-sequence transformers, the microcomputer is provided with serial communication interfaces, the zero-sequence transformers are connected with the microcomputer through the serial communication interfaces, and the zero-sequence transformers are parallelly connected onto the microcomputer. A voltage transformer is in triangular connection with an opening of the microcomputer, the voltage transformer, the microcomputer and the zero-sequence transformers form a circuit connected onto the busbar outgoing line, and the microcomputer adopts HHT line selection. The HHT-based microcomputer small-current earth-fault line selection device has the advantages that by means of HHT for line judgment and selection, oblivion of fault features due to interference and measurement errors is avoided, and sensitivity and reliability in fault line selection are improved; in addition, owing to adoption of the microcomputer for treatment, low cost, easiness and effectiveness in implementation and realization of meeting the requirement on automatic utilization of a power distribution network are achieved.

Description

technical field [0001] The invention relates to a small current grounding line selection device, in particular to a microcomputer small current grounding line selection device based on Hilbert-Huang Transform (HHT), belonging to the technical field of electrical protection. Background technique [0002] Most of my country's 3KV-66KV distribution network adopts the small current grounding method, that is, the neutral point is not effectively grounded, including the neutral point ungrounded system and the neutral point grounded system through the arc suppression coil. The advantage of the non-effective neutral point grounding system is that it can automatically extinguish the arc and restore insulation in most cases when a single-phase grounding occurs. However, when a permanent ground fault occurs, in order to prevent the fault from expanding due to the rise of the non-faulted phase voltage, the fault line must be determined and cut off as soon as possible, which raises the p...

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): G01R31/08
Inventor 万博文张进军王森苏玉峰吴玉保
Owner ANHUI KAICHUAN POWER PROTECTION EQUIP
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