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

A Method for Identification of Power Frequency Fault Current in Transmission Lines

A technology of power frequency fault current and fault current, applied in the fault location and other directions, can solve the problems of different traveling wave emission points, traveling wave positioning technology can not fully realize online monitoring, etc., to achieve the effect of simple algorithm

Active Publication Date: 2018-02-02
海南电力产业发展有限责任公司
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, traveling wave location technology cannot be applied to transmission line fault location on a large scale. This is because the origin of traveling waves is different under different power frequency fault current conditions, and the logic of traveling wave location must also change accordingly.
To sum up, traveling wave positioning technology cannot fully realize online monitoring

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
  • A Method for Identification of Power Frequency Fault Current in Transmission Lines
  • A Method for Identification of Power Frequency Fault Current in Transmission Lines
  • A Method for Identification of Power Frequency Fault Current in Transmission Lines

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] see figure 1 , figure 1 It is a flow chart of the steps of a power frequency fault current identification method of a power transmission line according to the present invention. The method comprises the steps of:

[0015] Step S101 , acquiring the power frequency fault current signal at the moment when the transmission line trips.

[0016] In this step, sensors are installed on the A, B, and C three-phase conductors of the overhead transmission line, and when the transmission line trips, the power frequency fault current waveform recorded by the sensor is obtained. Preferably, the sensor adopts a Rogowski coil sensor, the sampling frequency is 2400 Hz, and the sampling time is 200 microseconds. An example of the obtained primary power frequency fault current signal is as follows figure 2 .

[0017] Step S102, selecting a characteristic interval of the power frequency fault current.

[0018] In this step, the zero time of the obtained power frequency fault current ...

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 transmission line power frequency failure current identification method. The method comprises four steps of acquiring a power frequency failure current signal, selecting a characteristic interval of the power frequency failure current, calculating a current amplitude value of each characteristic interval, comparing the amplitude values of the characteristic intervals, and outputting a result. According to the transmission line power frequency failure current identification method, the adopted algorithm is simple, and the method can be applied to the online monitoring field.

Description

technical field [0001] The invention relates to the field of on-line monitoring of power transmission lines, in particular to a method for identifying power frequency fault currents of power transmission lines. Background technique [0002] The power industry has always attached great importance to the location of transmission line fault points. With the continuous development of the power system, there are more and more ultra-high voltage and long-distance transmission lines, and the accurate location of line fault points is even more important. In order to reduce the workload of line search, shorten the fault repair time, save a lot of manpower and material resources, improve the reliability of power supply, reduce the loss of power failure, strengthen and improve the level of system operation management, it is urgent to accurately find the fault point when the system fails . For most transient faults that can be successfully reclosed, accurately measuring the location o...

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 Patents(China)
IPC IPC(8): G01R31/08
Inventor 吴清胡滨黄松陈钦柱姚冬
Owner 海南电力产业发展有限责任公司