Submarine cable operation state monitoring device and monitoring method thereof

A technology of operating status and monitoring device, applied in the direction of fault location, etc., can solve the problem of no industrialization promotion, and achieve the effect of improving alarm accuracy, reducing fault false alarm rate, and reducing system false alarm.

Pending Publication Date: 2022-03-25
YANTAI POWER SUPPLY COMPANY OF STATE GRID SHANDONG ELECTRIC POWER +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, there is no industrialization of products for online monitoring and fault location of power cables in foreign countries. The company with leading technology is Kama Power Maintenance Company in the Netherlands. The company has a power cable operation monitoring center to provide users with monitoring data and maintenance information of cable operation. , fault diagnosis, etc. are also at the forefront of technology

Method used

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  • Submarine cable operation state monitoring device and monitoring method thereof
  • Submarine cable operation state monitoring device and monitoring method thereof
  • Submarine cable operation state monitoring device and monitoring method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0057] For the submarine cable operating state monitoring device of this embodiment, refer to the attached Figure 1-8 , including a lower computer 39, a sensor 40 and an upper computer 41 communicating with the lower computer 39. The sensor 40 is used for real-time online collection of the transient current signal and the power frequency current signal, and real-time online collection of the zero-sequence voltage signal; the lower computer 39 is used for processing the signal collected by the sensor 40 and uploading the collected data to The upper computer 41; the upper computer 41 is used for analyzing and processing the data uploaded by the lower computer 39.

[0058] The sensor 40 includes a combined current sensor 12 and a voltage sensor 13, wherein the combined current sensor 12 is installed on the submarine cable body, and the voltage sensor 13 is installed at the connection point between the sea and the land of the submarine cable or the secondary side of the substatio...

Embodiment 2

[0090] The purpose of this embodiment is to verify the fault alarm function, fault distance measurement function, fault location function, and latitude and longitude display function of the submarine cable operating state monitoring device in embodiment 1.

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Abstract

The invention discloses a submarine cable operation state monitoring method, and belongs to the field of submarine cable online monitoring. Which comprises a submarine cable and is characterized in that whether a submarine cable bus PT zero-sequence voltage transient signal is generated or not is detected to judge whether the submarine cable has an instantaneous transient fault or not, and fault early warning is performed on the submarine cable and the distance of a fault point is indicated by monitoring and recording an electromagnetic transient signal which is generated by the submarine cable and flows through a metal shielding layer. The submarine cable fault positioning system monitors the operation state of a submarine cable line on line in real time, realizes fault early warning and fault automatic positioning of the submarine cable for the fault transient process generated at the submarine cable fault moment, and marks the position of a fault point on a background map of the system.

Description

technical field [0001] The invention belongs to the field of submarine online monitoring, in particular to a submarine cable operation state monitoring device and a monitoring method. Background technique [0002] Submarine cables are an important part of the power grid for islands. Since submarine cables are distributed in different sea areas, the safe operation, normal maintenance and emergency repair of submarine power cables bring a lot of inconvenience. In addition, the island power grid is mostly powered by a single power supply, and the submarine cable line is the backbone of the line. Due to the harsh operating environment and the breakdown of ships, failures occur from time to time. When a cable fails, it will cause power outages to varying degrees, and it is difficult to find and repair the fault point. , The maintenance cycle is long, which seriously affects the normal production and life of the island residents and the development of the island economy. [0003]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/08
CPCG01R31/08
Inventor 郑禄冰高世琰葛运桢李彦澄邵华强姜利利刘文浩梁峻豪周美辰刘洋
Owner YANTAI POWER SUPPLY COMPANY OF STATE GRID SHANDONG ELECTRIC POWER
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