Travelling wave sensing device for measuring voltage travelling waves

A sensing device and voltage measurement technology, applied in the direction of fault location, etc., can solve the problems that it is difficult to ensure the accuracy of positioning and the accuracy of distance measurement results, and achieve the effects of small delay and improved accuracy and speed
CN104730418AInactive Publication Date: 2015-06-24STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST
Publication Date
2015-06-24
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a travelling wave sensing device for measuring voltage travelling waves. The travelling wave sensing device comprises a travelling wave sensor body and a signal processing circuit connected with the secondary side of the travelling wave sensor body, wherein the output end of the signal processing circuit is connected with the input end of a travelling wave head detection circuit. The travelling wave sensor body of the travelling wave sensing device has ideal amplitude-frequency, phase-frequency and transient characteristics of a band-pass filter, can meet the requirement for current and voltage steady state quantity detection and has the advantage that detected time delay is very small. The signal processing circuit directly identifies travelling wave heads, detects the polarity of the travelling wave heads and records the arrival moment of the travelling wave heads through a hardware circuit and performs protection and fault positioning, and protection accuracy and speed can be improved.
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Description

technical field

[0001] The invention relates to a sensing device, in particular to a traveling wave sensing device for measuring voltage traveling waves. Background technique

[0002] my country's electric power industry is developing vigorously and rapidly. Long-distance high-voltage or ultra-high-voltage transmission lines are exposed in the wilderness, and most of them are mountainous and hilly terrains in my country. Rainstorms, lightning and other weather reasons and human factors often cause line failures. The rapid and precise location of fault points has always been a problem that has not been completely solved by the power sector. It poses a great threat to the safety, high-quality, and economical operation of the power system, and it also brings a heavy burden to line operation and maintenance personnel. The electricity sector has brought incalculable losses. Quickly and accurately determining the fault point after a transmission line fault is a key technology to ...

Claims

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