Fault traveling wave signal coupling sensor for online fault ranging device

Abstract

The present invention relates to the technical field of sensors and more particularly relates to a fault traveling wave signal coupling sensor for an online fault ranging device. The sensor includes ahousing, a wire winding framework, a coil, a signal board, a PG head, and a signal line. The wire winding framework is arranged in the housing, the coil is wound on the wire winding framework, the signal board is fixed in the housing, the coil is electrically connected to the signal board, a mounting hole is formed in the housing, the PG head is connected to the mounting hole, the signal line passes through the PG head to connect the signal board, and the signal line is fixed to the housing through the PG head. The fault traveling wave signal coupling sensor for the online fault ranging device provided by the invention has good market application value for ensuring the effectiveness of the online fault positioning device and improving the power supply reliability of a power grid.

Description

technical field [0001] The invention relates to the technical field of sensors, and more specifically, to a fault traveling wave signal coupling sensor used for an online fault distance measuring device. Background technique [0002] Submarine cables are an important part of the construction of cross-sea networking projects, and play an important role in realizing the internationalization of power grids and the interconnection of regional power grids. In recent years, with the improvement of the economic level, the demand for electric energy on various islands and land is increasing. Many areas of the national power grid have built and are building a large number of submarine cables and offshore wind power, such as Jiangmen, Zhanjiang, Zhuhai, Shantou, Zhoushan and other islands. submarine cables. [0003] However, in terms of submarine cable operation and maintenance, high-precision monitoring and detection of submarine cables, as well as early warning of fault locations a...

AI Technical Summary

Problems solved by technology

This method has the following problems in the application of long-distance submarine cables: the time resolution of GPS is more than a few microseconds, the ranging error is more than a few hundred meters to several kilometers, and the test accuracy is low; the cost is high; Acquisition of fault traveling wave signal has poor waveform and is susceptible to interference; the reliability of the electrical connection between voltage sensor and high voltage is poor, and capacitive sensor is not suitable for long lines

For tens or even hundreds of kilometers of long-distance submarine cable lines, when the fault point is close to one of the terminals, due to the attenuation of the fault traveling wave signal along the cable, the sensitivity of the conventional sensor signal is low. At this time, the sensor of the other terminal detects The fault traveling wave signal is not available, resulting in the failure of the online ranging function

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