Check patentability & draft patents in minutes with Patsnap Eureka AI!

Y-side phase-shifting current phase compensation method for differential protection of YNy6 transformer

A differential protection and phase compensation technology, applied in emergency protection circuit devices, electrical components, etc., can solve the problem of not designing transformer differential protection current software, etc., and achieve the effect of preventing malfunction and easy implementation.

Inactive Publication Date: 2017-03-08
STATE GRID JIANGSU ELECTRIC POWER CO ZHENJIANG POWER SUPPLY CO
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, transformer protection manufacturers only design differential protection current phase compensation methods for transformer wiring groups YNd11, YNd1, and YNyn12 and their wiring combinations, and have not designed transformer differential protection for other wiring groups and wiring combinations. Protection Current Software Phase Compensation Method

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
  • Y-side phase-shifting current phase compensation method for differential protection of YNy6 transformer
  • Y-side phase-shifting current phase compensation method for differential protection of YNy6 transformer
  • Y-side phase-shifting current phase compensation method for differential protection of YNy6 transformer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0028] Such as figure 1 Shown is the YNy6 transformer wiring diagram that the present invention relates to.

[0029] Since the microcomputer transformer protection is generally designed with integrated main protection and backup protection and dual configuration, the transformer differential protection requires YNy6 transformer high voltage side and low voltage side TA secondary windings to be connected in star connection. The current software phase compensation scheme of YNy6 wiring transformer differential protection device is:

[0030] Step 1: Connect YNy6 transformer high-voltage side and low-voltage side current transformer TA secondary windings to star connection;

[0031] Step 2: Based on the y side, for the y side, because the zero sequence current is to be eliminated Effect on differential protection, because zero-sequence current ...

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 a Y-side phase-shifting current phase compensation method for differential protection of a YNy6 transformer. A zero-sequence current is eliminated from a phase current from both of a Y side and a y side of the YNy6 transformer so as to prevent from misoperation caused by zero-sequence current influence in the differential protection of the transformer. For the differential protection of the YNy6 transformer, the phase compensation adopts a Y side phase-shifting method by taking the y side as the reference, wherein current phase compensation on the y side is performed by taking a phase current as the reference and by adopting a calculation method for eliminating the zero-sequence current from the sequence phase current, while current phase compensation on the Y side of the YNy6 transformer is performed by adopting the calculation method for eliminating the zero-sequence current from the sequence phase current based on the principle of same phase with the y side corresponding current. The compensation method is applicable to a current software phase compensation technical scheme of a longitudinal differential protection apparatus for power transmission and distribution network substation YNy6 wiring transformers at various voltage levels; and in addition, the compensation method is simple and clear, and easy to realize.

Description

technical field [0001] The invention relates to a YNy6 transformer longitudinal differential protection elimination zero-sequence current Y-side phase-shifting current phase compensation method, which belongs to the technical field of relay protection control equipment for electric power transmission and distribution networks. Background technique [0002] Since the phases of the currents on each side of the transformer may be inconsistent, the transformer longitudinal differential protection (hereinafter referred to as the transformer differential protection) needs to perform current phase compensation. There are two methods for current phase compensation of transformer differential protection: 1. Traditional hardware phase shifting: for example, YNd11 transformer Y side current transformer TA secondary winding adopts delta d-11 connection, d side TA secondary winding adopts star Y -12 wiring; 2. Software phase shift: that is, use software programs and calculation formulas ...

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): H02H7/045
CPCH02H7/045
Inventor 汤大海李静易新陈永明曹斌崔玉孙东杰马海薇陈燕施伟成
Owner STATE GRID JIANGSU ELECTRIC POWER CO ZHENJIANG POWER SUPPLY CO
Features
  • R&D
  • 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