Protection equipment for 6-35kV power grid voltage transformers

A technology for voltage transformers and protection equipment, which is applied in the field of protection equipment for 6-35kV power grid voltage transformers. It can solve problems such as poor heat dissipation, exceeding voltage transformers, bursting and burning of voltage transformers, etc., so as to prevent damage and reduce damage. Operation time, effect of reducing operation time and operation cost

Inactive Publication Date: 2015-11-25
STATE GRID CORP OF CHINA +1
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Fully enclosed silicone rubber voltage transformers are widely used in ungrounded power grid systems of 6-35kV power grids. Compared with oil-immersed voltage transformers, they have many advantages, such as small size, high insulation level, and convenient operation and maintenance. However, due to the voltage The core shell of the transformer is fully enclosed by silicon rubber, and its heat dissipation level is poor
In the abnormal operation mode when the single phase is grounded in the 6~35kV ungrounded g

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
  • Protection equipment for 6-35kV power grid voltage transformers
  • Protection equipment for 6-35kV power grid voltage transformers

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0012] The protection equipment of the 6-35kV grid voltage transformer of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments:

[0013] figure 1 It is a schematic structural diagram of the 6-35kV grid voltage transformer of the present invention before improvement. In the figure, only the RN2 type tubular high voltage fuse 7 is provided between the voltage transformer 2 and the grid bus 6, and the voltage transformer 2 of the ungrounded system before the improvement only passes the RN2 type tubular high voltage of 0.5A per phase. Fuse 7 is used for protection, and the minimum value of its fusing current is limited, and the current voltage transformer capacity is usually 120VA. Under full load, Ifh=P / Uph=120 / 5.77*1000=0.02A, the used 0.5 The tubular high-voltage fuse 7 of A usually does not blow after the voltage transformer 2 burns out.

[0014] figure 2 It is the electrical principle diagram of the p...

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 provides a piece of protection equipment for 6-35kV power grid voltage transformers, comprising voltage transformers. A measurement and control protection device is arranged beside the voltage transformers. Each voltage transformer is internally equipped with a temperature sensor. Current transformers are arranged between the voltage transformers and a power grid bus. High-voltage load switches are arranged between the current transformers and the power grid bus. By adopting the protection equipment for voltage transformers, the real-time working condition of the voltage transformers can be judged comprehensively. By tripping the load switches of the voltage transformers, abnormal bus voltage can be cut off, and damage to the voltage transformers is prevented.

Description

technical field [0001] The invention relates to a protective device in a power system, more specifically to a protective device for a voltage transformer of a 6-35kV power grid. Background technique [0002] Fully enclosed silicone rubber voltage transformers are widely used in ungrounded power grid systems of 6-35kV power grids. Compared with oil-immersed voltage transformers, they have many advantages, such as small size, high insulation level, and convenient operation and maintenance. However, due to the voltage The core shell of the transformer is fully enclosed by silicon rubber, and its heat dissipation level is poor. In the abnormal operation mode when the single phase is grounded in the 6~35kV ungrounded grid system, the ungrounded phase voltage rises to 1.732 times the normal voltage, and the electric energy load capacity of the voltage transformer is nearly 4 times the normal capacity, for example: 10kV commonly used The voltage transformer has three secondary coi...

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): H02H7/00
Inventor 王源栾兆卫弋克让吴浩亮柯晓鹏王鹏杨晓萍李小龙赵红萍文苑丁王攀李筱萍王若晨王晨宇
Owner STATE GRID CORP OF CHINA
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