Method for measuring parallel grid line zero-sequence capacitance

A technology of zero-sequence capacitance and lines, which is applied in the field of measuring zero-sequence capacitance of parallel grid lines, can solve the problems of high interference voltage, accurate measurement interference of line power frequency parameters, rise of induced voltage of transmission lines, etc., and achieves convenient use and simple testing Effect

Active Publication Date: 2013-12-04
STATE GRID CORP OF CHINA +2
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the situation of power lines being erected on the same tower and crossing them becomes more and more serious, the induced voltage between transmission lines increases, which poses a serious threat to the safety of testers and instruments, and brings great pressure to the accurate measurement of line power frequency parameters. serious disturbance
In the actual work of line parameter testing, it is found that the interference voltage between transmission lines is as high as thousands of volts, and the interference voltage between the three-phase conductors of the same line is also very different.

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
  • Method for measuring parallel grid line zero-sequence capacitance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0023] The method of measuring the zero-sequence capacitance of parallel power grid lines, its circuit structure is as follows figure 1 As shown, the circuit structure includes three-phase wires A, B, and C parallel to each other, a single-phase experimental power supply 1 connected to the three-phase wires via a connecting circuit, a mutual inductance measurement device 2 , and a distributed power generation device 3 . This method is to use single-phase experimental power supply 1, distributed power generation device 3 and mutual inductance measurement device 2 to measure zero-sequence capacitance. Grounding, the single-phase experimental power supply 1 is connected to one of the connection points of the three connection branches through the line, and the distributed power generation device 3 is connected to the ground terminal line of the mutual inductance measurement device through the line. In addition, the distributed The power generating device 3 is also connected to the...

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 a method for measuring parallel grid line zero-sequence capacitance. The zero-sequence capacitance is measured through a single-phase power, a distributed power generator and a mutual inductance measuring device, one end of the mutual inductance measuring device is connected with three-phase guide lines through three connecting branch lines, and the other end of the mutual inductance measuring device is connected to the ground; the single-phase power is connected at one connecting point of the three connecting branch lines through a line, and the distributed power generator is connected to a line connected to the grounding end of the mutual inductance measuring device through a line and is connected with the single-phase power. Compared with the prior art, the method is convenient to use and easy to measure, by means of test, the adjacent parallel lines are on different grounding conditions, measuring results of the zero-sequence capacitance are consistent, so that the measuring results are accurate.

Description

technical field [0001] The invention relates to a capacitance measurement method, in particular to a method for measuring the zero-sequence capacitance of parallel grid lines. Background technique [0002] With the large-scale application of double (multiple) circuit lines on the same tower in my country's power grid, and the merger of large-scale line corridors, there are more and more transmission lines running in parallel on the same tower or in the same transmission channel. Although the corridors of the UHV transmission lines and the planned lines of power grids at all levels have not yet been fully determined, according to the currently determined part of the line routes, it is inevitable that the UHV AC and DC lines will use the same transmission corridor as the existing 500kV grid lines, and the parallel construction of lines will become a trend. Especially in economically developed areas, AC and DC transmission lines are becoming more and more dense, and land resou...

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): G01R27/26
Inventor 程倩黄一超
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