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

Logical judgment-based substation area protection system and method

A technology of logical judgment and station domain protection, applied in the direction of emergency protection circuit devices, electrical components, etc., can solve the problem that the protection cannot take into account selectivity, quickness and sensitivity at the same time, and cannot meet the higher requirements of complex power grid protection, etc. problem, to achieve the effect of improving backup protection performance, increasing selectivity and reliability, and solving long action delay

Inactive Publication Date: 2017-02-22
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
View PDF4 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The traditional protection of substations can only obtain local single-bay or local information. This inherent deficiency has caused the protection to fail to take into account selectivity, quickness and sensitivity at the same time, and it is increasingly unable to meet the higher protection requirements of complex power grids.

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
  • Logical judgment-based substation area protection system and method
  • Logical judgment-based substation area protection system and method
  • Logical judgment-based substation area protection system and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] figure 1 It is a structural diagram of the station domain protection system based on logical judgment provided by the present invention, such as figure 1 As shown, the station domain protection system based on logic judgment provided by the present invention includes a sequentially connected data reading module, logic judgment module and protection action module.

[0037] The data reading module is used to collect the logic signals of the substation secondary protection devices, including the complex voltage locking signal, overcurrent protection signal, current direction signal, zero sequence overcurrent protection signal, zero sequence current direction signal, and high voltage protection device of the transformer protection device. The distance protection signal, zero-sequence current direction signal, and zero-sequence overcurrent protection signal of the outlet protection device on the side, the medium voltage side, and the low voltage side, and send the collected ...

Embodiment 2

[0053] Build a model of a station in Liupanshui, Guizhou on RTDS for simulation verification, the model simulation picture is as follows Figure 9 shown. Set single-phase short circuit, phase-to-phase short circuit, three-phase short circuit, two-phase ground short circuit, developing fault and transfer fault on the high-voltage side bus, three sides of the transformer, and the medium and low-voltage side bus to verify the protection function of the station domain. The verification results are shown in Table 1.

[0054] Table 1. Simulation verification results

[0055]

[0056]

[0057]

[0058]

[0059]

[0060]

[0061]

[0062]

[0063] The verification results show that the proposed station domain protection scheme can accurately identify various faults in the station and meet the requirements of rapidity, selectivity and sensitivity of protection. Compared with traditional protection, the action speed of station protection has been significantly i...

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 belongs to the technical field of power system relay protection, and particularly relates to a logical judgment-based substation area protection system and method. The system is characterized by comprising a data reading module, a logic judgment module and a protection action module which are sequentially connected. The method comprises the steps of collecting data; obtaining fault information through logic judgment by using a collected secondary protection device action logic signal of a substation; and sending out a tripping signal to a corresponding circuit breaker according to the fault information. According to the logical judgment-based substation area protection system and method, the backup protection performance of in-station components is effectively improved; the problems that traditional staged backup protection is difficult to match and the action delay is long are solved; and the logical judgment-based substation area protection system and method are simple, reliable and easy to implement.

Description

technical field [0001] The invention belongs to the technical field of electric power system relay protection, and in particular relates to a station domain protection system and method based on logic judgment. Background technique [0002] The traditional protection of substations can only obtain local single-bay or local information. This inherent deficiency has caused the protection to fail to take into account selectivity, quickness and sensitivity at the same time, and it is increasingly unable to meet the higher requirements for protection of complex power grids. At the same time, with the continuous advancement of computer and communication technology, it has become possible to obtain station-wide information to realize station domain protection. Researching station domain protection is of great significance to ensure the safe operation of the power grid. [0003] At present, there are mainly two algorithms for station domain protection: centralized and distributed. ...

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): H02H7/00H02H7/04H02H7/22
CPCH02H7/00H02H7/04H02H7/22
Inventor 王增平马静王桐孙吕祎
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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