Supercharge Your Innovation With Domain-Expert AI Agents!

High-voltage electrical appliance insulation parameter on-line monitoring method based on reference phase method

A technology of high-voltage electrical equipment and reference phase, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve the problems of increasing on-site construction volume, prone to distortion, cable laying or removal, etc., to enhance anti-common mode interference ability, improve safety and reliability, and reduce the number of installations

Inactive Publication Date: 2005-01-19
上海智光电力技术有限公司
View PDF0 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In practice, one voltage transformer and several capacitive devices are usually installed on the same bus in a substation. Therefore, in order to be able to monitor the insulation parameters of all capacitive devices online, the traditional method is to use multiple shielded cables Lead the secondary side voltage signal of the PT to the monitoring unit of each capacitive device for corresponding processing, but this will bring many disadvantages
First of all, for substations with a voltage level of 110kV and above, because the distance between different devices is relatively long, the analog signal needs to be transmitted over a long distance in the complex electromagnetic environment of the substation, and it is easy to introduce a large amount of electromagnetic interference, causing Signal distortion, so the PT secondary voltage signal, that is, the reference voltage signal for calculation, is prone to distortion during long-distance transmission, which affects the measurement accuracy of the dielectric loss factor of capacitive equipment and causes misjudgment of faults
Secondly, long-distance cable laying will also increase the probability of cable ground faults, which will affect the safe and reliable operation of the system.
Furthermore, since the number of capacitive equipment in a substation usually accounts for more than 40% of the total electrical equipment in the substation, if the traditional monitoring method is used, a large number of cables need to be laid, which not only increases the complexity of the system, but also Increased the amount of construction on site
In addition, if the main wiring of the primary equipment of the substation is changed, for example, when some capacitive equipment is added or removed, the problem of laying or removing the cables for transmitting voltage signals will occur, which not only increases the difficulty of on-site construction, but also imposes a burden on the operation department. Daily work brings some trouble

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
  • High-voltage electrical appliance insulation parameter on-line monitoring method based on reference phase method
  • High-voltage electrical appliance insulation parameter on-line monitoring method based on reference phase method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] Now take capacitive equipment as an example to illustrate the specific application process of the reference phase method.

[0021] Let the reference phase in the station be  O , the phase of the final screen current signal collected by the capacitive equipment monitoring unit is  I , the signal sent to the master is the phase difference between this phase and the reference phase, that is ( I - O ). Let the system voltage phase collected by the system voltage monitoring unit be  U , the signal sent to the master is also the phase difference between this phase and the reference phase, that is ( U - O ). The main control computer receives the signal ( I - O ) and ( U - O ) for differential processing to obtain the parameter   , as shown in Equation 2.

[0022]   =( I - O )-( U - O )=( I - U ) (Formula 2)

[0023] Visible,   It is the phase difference between the terminal current signal of the capacitive devic...

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

This invention relates to an on-line monitoring method of high-pressure electrical apparatus insulation parameters based on preference phase method, which comprises data collection, data process and analysis and diagnose decision-making. The online monitoring system is divided into two categories: integral online monitoring system and distributed online monitoring system which is mainly monitor the dielectric loss and constant capacitance of capacity apparatus. It is characterized by adopting reference phase method and locating sensors used for collecting reference phase signals in each monitoring unit. This invention avoids the long distance transmission of PT secondary voltage signals and can ensure both the accuracy of insulation parameters measuring and increase the safety reliability of the system; it adopts reference phase to increase the measuring accuracy of insulation parameters; it eliminates all impacts generated by absolute angle errors of the sensor itself on the insulation parameter measuring with high application values.

Description

1. Technical field: [0001] The invention relates to on-line monitoring of insulation of high-voltage electrical equipment, more specifically to an on-line monitoring method of insulation parameters of high-voltage electrical equipment based on a reference phase method. 2. Background technology: [0002] Due to the influence of factors such as electric field, conductor heating, mechanical force, chemical corrosion and environment, the insulation performance of power transformers, current transformers, lightning arresters and other high-voltage electrical equipment in the power system will inevitably gradually deteriorate during long-term operation. , and even lead to equipment failure, threatening the safe operation of the power system. Therefore, in order to ensure the safe and reliable operation of the power system and minimize the accident rate, it is necessary to conduct real-time insulation on-line monitoring of the insulation status of high-voltage electrical equipment,...

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
Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00G01R31/12
Inventor 郑犇陈新喜
Owner 上海智光电力技术有限公司
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