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

Integrated protection method for intelligent substation

An intelligent substation and current technology, applied in emergency protection circuit devices, electrical components, etc., can solve problems such as data loss and data errors, and achieve the effects of accurate identification, strong applicability, and simple calculation.

Inactive Publication Date: 2016-12-14
国网内蒙古东部电力有限公司通辽供电公司 +2
View PDF3 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the characteristics of information sharing in smart substations are prone to data loss or data errors.
[0003] The traditional protection configuration is no longer suitable for the development of the power grid, the sharing of fault information, and the effective coordination and cooperation among various protections can exist. The multi-point information of the substation can be used to quickly and reliably remove the fault.

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
  • Integrated protection method for intelligent substation
  • Integrated protection method for intelligent substation
  • Integrated protection method for intelligent substation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] Embodiment 1 provides an integrated protection method for a smart substation. When the substation transformer T1 fails and the data transmission is normal, it includes the following steps:

[0064] S1: Utilize the phase characteristics of the positive sequence fault component current at both ends of the fault component, perform phase comparison to constitute the fault discrimination principle, and combine the phase information collected by the intelligent electronic device (IED) to identify the fault component;

[0065] Step S1 includes using the current phase characteristics of positive sequence fault components to form fault discrimination principles combined with phase information collected by intelligent electronic devices (IEDs) to identify faulty components, specifically including:

[0066] S11: It is stipulated that the positive sequence fault component current flowing through the protection is directed from the bus to the line; when the line, bus, and transformer...

Embodiment 2

[0093] Embodiment 2 provides an integrated protection method for a smart substation. When the substation transformer T1 fails and the fault phase information collected by the IED30 is lost, the identification of the fault element includes the following steps:

[0094] Collect the positive sequence fault component current information, compare the positive sequence fault component current phases at both ends of each component, and judge the failure of the low-voltage bus or transformer T1 according to the principle of fault component discrimination, and first trip the circuit breaker between the transformer and the low-voltage bus. Figure 5 , Figure 6 , Figure 7 , Figure 8 It is the simulation diagram of the positive sequence fault component current phase comparison value of the transformer high voltage side and low voltage side line output by IED29; Figure 9 The simulation diagram of the output value of the circuit breaker on the low-voltage side of the transformer outpu...

Embodiment 3

[0097] Embodiment 3 provides an integrated protection method for a smart substation. When the substation transformer T1 fails and the low-voltage side fault phase information collected by the IED30 is wrong, the fault component identification includes the following steps:

[0098] Collect the positive sequence fault component current information, compare the positive sequence fault component current phases at both ends of each component, and judge it as a low-voltage bus fault according to the principle of fault component discrimination. between circuit breakers. Figure 15 , Figure 16 , Figure 17 , Figure 18 The simulation diagram of the current phase comparison value of the positive sequence fault component of the low-voltage busbar and its lines output by IED29; Figure 19 The simulation diagram of the output value of the low-voltage bus circuit breaker output by IED29;

[0099] Collect the positive sequence fault component current information again, use the positive...

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 integrated protection method for an intelligent substation, wherein phase comparison is carried out by utilizing phase characteristics of positive-sequence fault component current at two ends of a fault component, so that a fault judgement principle is formed; in combination with phase information acquired by an intelligent electronic device (IED), the fault component is judged; when the phase information acquired by the IED is missing or wrong, phase information and current amplitude information in an identification area of the IED are enlarged; in combination with a predetermined action decision, the fault component still can be rapidly removed; fault component judgement of a transformer, a bus and a circuit in the intelligent substation can be simultaneously carried out; the method disclosed by the invention is different from the past method, only one fault component is judged; and the method is scientific, reasonable, simple to calculate, simple, convenient and easy to do, accurate to judge and high in practicability and sensitivity, and has a certain fault tolerance.

Description

technical field [0001] The invention relates to the technical field of relay protection, and relates to an integrated protection method for an intelligent substation. Background technique [0002] With the rapid development of the economy, the scale and complexity of my country's power grid have been expanded and improved accordingly, and the operation mode has become more flexible. The requirements for relay protection of smart substations are getting higher and higher. Compared with traditional substations, smart substations have realized The information digitization of the whole station, the networking of the communication platform, and the standardization of information sharing can realize interoperability conveniently. However, the characteristics of information sharing in smart substations are prone to data loss or data errors. [0003] The traditional protection configuration is no longer suitable for the development of the power grid. The sharing of fault information...

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): H02H7/22H02H7/26
CPCH02H7/22H02H7/26
Inventor 华亮亮金恩淑王润之金雨薇宣晓辰袁野郭见红
Owner 国网内蒙古东部电力有限公司通辽供电公司
Features
  • Generate Ideas
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com