Unlock instant, AI-driven research and patent intelligence for your innovation.

Traveling wave single-terminal distance measurement device test method based on simulation data

A traveling wave ranging device and single-ended ranging technology, which are applied in the directions of measuring devices, measuring electrical variables, instruments, etc., can solve the problems that restrict the improvement of ranging quality, the low reliability of traveling wave fault ranging devices, and the limitation of travel. The problem of efficient operation and maintenance of the wave fault distance measuring device has achieved the effect of improving the quality of distance measurement.

Active Publication Date: 2017-02-22
KUNMING UNIV OF SCI & TECH
View PDF6 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the complexity of fault traveling wave sources and the diversification of traveling wave acquisition principles and installation methods, it is currently difficult to conduct relatively advanced and systematic tests on traveling wave fault location devices that have been installed on site and have been in operation, which severely limits the efficiency of traveling wave fault location devices. Operation and maintenance, resulting in low operating reliability of the traveling wave fault location device, which greatly restricts the improvement of the distance measurement quality
So far, the testing and evaluation of traveling wave fault devices have mainly focused on testing based on off-line digital simulation and simple start-up testing, and there is no unified test method and means for this device in China.

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
  • Traveling wave single-terminal distance measurement device test method based on simulation data
  • Traveling wave single-terminal distance measurement device test method based on simulation data
  • Traveling wave single-terminal distance measurement device test method based on simulation data

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1: Establish a double-ended power supply 500kV single-circuit circuit simulation system, the system wiring diagram is as follows figure 2 shown. The short-circuit capacity of system S1 is 3000MW, and the short-circuit capacity of system S2 is 2000MW. The busbar M side adopts 3 / 2 connection mode, and the total length of line MN is 200km. Using the above model, a fault occurs at 5km away from the M side of the busbar, the transition resistance is 0 ohms, the initial phase angle of the fault A phase is 45 degrees, and the busbar structure M=3, N=3.

[0032] The waveform recorded by the traveling wave single-ended distance measuring device is as follows: Figure 4 As shown, the automatic output fault distance of the traveling wave single-ended ranging device is 4.8km, which meets the requirements within the error range.

Embodiment 2

[0033] Embodiment 2: Establish a double-ended power supply 500kV single-circuit circuit simulation system, the system wiring diagram is as follows figure 2 shown. The short-circuit capacity of system S1 is 3000MW, and the short-circuit capacity of system S2 is 2000MW. The busbar M side adopts 3 / 2 connection mode, and the total length of line MN is 200km. Using the above model, a fault occurs at 400km away from the M side of the busbar, the transition resistance is 0 ohms, the initial phase angle of the fault A phase is 45 degrees, and the busbar structure M=3, N=3.

[0034] The waveform recorded by the traveling wave single-ended distance measuring device is as follows: Figure 5 As shown, the automatic output fault distance of the traveling wave single-ended ranging device is 200.4km, which meets the requirements within the error range.

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 traveling wave single-terminal distance measurement device test method based on simulation data, and belongs to the technical field of electric power system relay protection. As for a power transmission line, a traveling wave distance measurement device is only installed in a transformer substation connected with the side of a bus. A power transmission line model is established through electric power system simulation software according to the actual operation situation of the power transmission line so that different fault types and different fault locations of fault simulation waveforms are acquired; then the edited simulation waveforms pass through a high-power high-speed signal generator to output fault waveforms to the traveling wave distance measurement device; and the traveling wave distance measurement device records the fault waveforms and then calculates the fault distance. If the traveling wave distance measurement device can start, the wave recording starting function is qualified, or the wave recording starting function is unqualified; and distance measurement is performed on the basis of the qualified wave recording function, and the distance measurement result is accurate if the distance measurement result is within the error range, or the distance measurement parameters require to be adjusted or the distance measurement result is unreliable.

Description

technical field [0001] The invention relates to a testing method of a traveling wave single-end ranging device based on simulation data, and belongs to the technical field of electric power system relay protection. Background technique [0002] With the popularization and use of traveling wave fault location devices in 220kV and above transmission networks, the reliability and accuracy of device location have attracted more and more attention. Due to the complexity of fault traveling wave sources and the diversification of traveling wave acquisition principles and installation methods, it is currently difficult to conduct relatively advanced and systematic tests on traveling wave fault location devices that have been installed on site and have been in operation, which severely limits the efficiency of traveling wave fault location devices. Operation and maintenance, resulting in low operating reliability of the traveling wave fault location device, which greatly restricts th...

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): G01R35/00
CPCG01R35/00
Inventor 束洪春卢杨曹璞璘沐润志
Owner KUNMING UNIV OF SCI & TECH