Capacitive voltage transformer error state evaluation method and system thereof

A voltage transformer and state assessment technology, applied in the electric power field, can solve the problems of differential capacitance voltage transformer, unsuitable for measurement error stability, and can only be calibrated in a short time.

Active Publication Date: 2019-03-08
武汉格蓝若智能技术股份有限公司
View PDF4 Cites 28 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the defects of the prior art, the purpose of the present invention is to solve the problem that the traditional regular off-line maintenance method is no longer suitable for capacitive voltage transformers with poor measurement error stability, and the evaluation of transfo

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
  • Capacitive voltage transformer error state evaluation method and system thereof
  • Capacitive voltage transformer error state evaluation method and system thereof
  • Capacitive voltage transformer error state evaluation method and system thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0109] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0110] The present invention proposes a method and system for evaluating the metering error state of a capacitive voltage transformer based on adaptive principal component analysis. Evaluate. The role of CVT is to accurately measure the primary voltage signal of the grid node. Due to the influence of node load changes and operating environment, the primary voltage signal of the grid node is a ...

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 capacitive voltage transformer error state online monitoring method and a system thereof. The method comprises the steps of through synchronous triggering of a synchronous signal unit, acquiring and calibrating measurement data of an operation three-phase capacitive voltage transformer, establishing a threshold which represents a statistics characteristic parameter of thecapacitive voltage transformer error state and a statistics characteristic quantity of a standard normal operation state by means of a principal component analysis method; acquiring measurement dataof the three-phase capacitive voltage transformer in the operation state, according to a statistics characteristic parameter, representing a statistics characteristic quantity of the three-phase capacitive voltage transformer error state by means of an adaptive principal component analysis method, and comparing the statistics characteristic quantity with a statistics threshold for determining whether the error state of the capacitive voltage transformer is normal; and when the statistics characteristic quantity of the measured data exceeds the statistics threshold, performing diagnosis on theerror abnormity of the capacitive voltage transformer. The capacitive voltage transformer error state online monitoring method and the system thereof can realize real-time online evaluation on the error state of the capacitive voltage transformer.

Description

technical field [0001] The invention belongs to the field of electric power technology, and more specifically relates to a method and system for evaluating an error state of a capacitor voltage transformer (CapacitorVoltage Transformer, CVT). Background technique [0002] The measuring transformer is an important primary equipment in the substation and an important part of the electric energy metering device. Among them, capacitive voltage transformers are widely used in power systems with voltage levels of 110kV and above because of their good insulation performance and economy. Compared with the traditional electromagnetic voltage transformer, the structure of the capacitive voltage transformer is more complicated, the error stability in the operation process is not high, and it is easy to appear out of tolerance phenomenon, which affects the fairness and accuracy of electricity trading. In serious cases It may even threaten the safe operation of the power grid. As a mea...

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): G01R35/02
CPCG01R35/007G01R35/02
Inventor 李红斌陈庆张竹
Owner 武汉格蓝若智能技术股份有限公司
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