Line protection method for power transmission line

A line protection and transmission line technology, applied in emergency protection circuit devices, electrical components, etc., can solve problems such as power failure and system collapse

Inactive Publication Date: 2015-12-09
HENAN XINGZHI PATENT SERVICE CO LTD
View PDF3 Cites 17 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the system is faulty, the refusal of protection or the false tripping of non-faulty equipment will cut off 2 or more lines, causing a large-scale power outage, and even causing the system to collapse, with extremely serious consequences.

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
  • Line protection method for power transmission line
  • Line protection method for power transmission line
  • Line protection method for power transmission line

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0048] A line protection method for a power transmission line, the content of the line protection includes: overcurrent protection, distance protection, zero-sequence current protection, grid oscillation detection / blocking, automatic reclosing, tripping protection, longitudinal direction protection, and sudden change protection. Set the corresponding general modules according to the protection content, namely overcurrent module, distance protection module, zero sequence current protection module, oscillation blocking module, automatic reclosing module, tripping module, longitudinal direction protection module, high frequency protection module, circuit breaker failure Protection module, mutation start module, overload protection module and differential protection module.

[0049] The sudden change of current starting module is used as the opening element of many protections such as distance protection and zero-sequence protection. This module runs when each sampling point arrive...

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 power transmission line protection method. Protection of various faults of a power transmission line can be realized via an over-current module, a distance protection module, a zero-sequence current protection module, an oscillation locking module, an automatic reclosing module, a tripping module, a pilot protection module, a high frequency protection module, a circuit breaker failure protection module, a break variable starting module, an overload protection module and a differential protection module so that normal operation of the line can be guaranteed.

Description

technical field [0001] The invention relates to the technical field of power supply and distribution protection, in particular to a line protection method for power transmission lines. Background technique [0002] With the rapid increase of power system capacity, transmission lines are increasing day by day. Transmission lines are often connected to a large power plant at one end and to a load center at the other end: or to a large power system at both ends. Due to the long lines and high transmission power, it is very important to maintain the safe and stable operation of transmission lines. In order to ensure the safe and stable operation of ultra-high voltage transmission lines, it is required that the main protection of the transmission line can reliably and quickly remove the first fault of the line, and the action time of the transmission line protection should not exceed 1-2 cycles. When the system fails, the refusal of protection or the false tripping of non-fault...

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): H02H7/26
Inventor马新攀
OwnerHENAN XINGZHI PATENT SERVICE CO LTD