Multipoint earthing trouble shooting equipment for substation voltage transformer secondary circuit

A voltage transformer and secondary circuit technology, which is applied in the field of fault finding equipment for multi-point grounding of the secondary circuit of voltage transformers in substations, can solve problems such as inaccurate measurement, influence of measured voltage, and malfunction of protection devices Improved safety and stability, easy operation

Inactive Publication Date: 2014-01-01
STATE GRID CORP OF CHINA +2
View PDF11 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] According to the "Key Points of Anti-accident Measures for Relay Protection and Safety Automatic Devices of Electric Power System", it can be known that the secondary circuits of several groups of voltage transformers connected through the zero-phase small busbar (N600) in the control room should on

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
  • Multipoint earthing trouble shooting equipment for substation voltage transformer secondary circuit
  • Multipoint earthing trouble shooting equipment for substation voltage transformer secondary circuit
  • Multipoint earthing trouble shooting equipment for substation voltage transformer secondary circuit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] Depend on figure 1 As shown, the substation voltage transformer secondary circuit multi-point grounding fault finding equipment includes a processor, a display module and at least one clamp current transformer, and the output terminals of the clamp current transformer are sequentially connected with signal processing circuits and An analog-to-digital converter, the output end of the analog-to-digital converter is connected to the first input end of the processor, and the first output end of the processor is connected to the input end of the display module. The number of the clamp current transformers can be set according to the actual situation, usually 1 to 4 clamp current transformers. When there are multiple clamp current transformers, the output terminals of the multiple clamp current transformers are all connected to the input terminals of the signal processing circuit.

[0025] According to the above-mentioned present invention, its working principle is: when det...

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 multipoint earthing trouble shooting equipment for a substation voltage transformer secondary circuit. The multipoint earthing trouble shooting equipment comprises a processor, a display module and at least one pincerlike current transformer. The output end of the pincerlike current transformer is sequentially connected with a signal processing circuit and an analog-digital converter, the output end of the analog-digital converter is connected with a first input end of the processor, and a first output end of the processor is connected with the input end of the display module. According to the multipoint earthing trouble shooting equipment, specific positions where multipoint earthing faults occur in the substation voltage transformer secondary circuit can be quickly and accurately found out, thus a safe and effective finding means for multipoint earthing faults in the voltage transformer secondary circuit can be provided for multiple power generation and power supply enterprises, and safety and stability of an electric system are greatly improved. The multipoint earthing trouble shooting equipment is widely used for the field of fault detection of direct current systems.

Description

technical field [0001] The invention relates to the field of fault detection of a DC system, in particular to a fault finding device for multi-point grounding of a secondary circuit of a voltage transformer of a substation. Background technique [0002] According to the "Key Points of Anti-accident Measures for Relay Protection and Safety Automatic Devices of Electric Power System", it can be known that the secondary circuits of several groups of voltage transformers connected through the zero-phase small busbar (N600) in the control room should only be grounded at one point of N600 in the control room If there are two or more grounding points in the secondary circuit of the voltage transformer, the measured voltage will be affected, and in severe cases, the metering and measurement will be inaccurate, causing the protection device to malfunction. Therefore, people should develop a search device that can quickly determine whether there is a multi-point ground fault in the se...

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): G01R31/02
Inventor 汪江丁立王智博刘治军杨慧马燕崔战涛李武余伟李互刚徐玉凤
Owner STATE GRID CORP OF CHINA
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