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Wavelet filter for extracting effective quench signal of high temperature superconducting magnet

A wavelet filter and high-temperature superconducting technology, applied in the field of filtering, can solve problems such as the increase in the error rate of quench judgment, and achieve the effect of flexible and convenient use

Active Publication Date: 2018-01-26
HUAZHONG UNIV OF SCI & TECH
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  • Claims
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Problems solved by technology

The existence of noise directly leads to an increase in the error rate of quench judgment

Method used

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  • Wavelet filter for extracting effective quench signal of high temperature superconducting magnet
  • Wavelet filter for extracting effective quench signal of high temperature superconducting magnet
  • Wavelet filter for extracting effective quench signal of high temperature superconducting magnet

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Embodiment Construction

[0030] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0031] In this embodiment, an FPGA (Field Programmable Gate Array) module is used to implement the aforementioned wavelet filter to filter the quench signal. The whole FPGA module includes control module, AD / DA driver module, wavelet analysis module and signal input and output module. The control module can support the user to input the filter coefficient through the button, and the signal is i...

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Abstract

The invention discloses a wavelet filter for extracting an effective quench signal of a high temperature superconducting magnet. The wavelet filter comprises an AD conversion module, a wavelet analysis module, a control module and a DA conversion module, wherein the wavelet analysis module is used to filter a quench signal of the high temperature superconducting magnet; the control module is usedto adjust a filter coefficient of the device; and through the control module, output signals can be controlled to achieve free adjustment within a total of 11 levels from 0%, 10%,...... to 100%. According to the wavelet filter disclosed by the invention, the online filtering of the quench signal can be realized. Results show that by adopting the wavelet filter disclosed by the invention, voltage fluctuations coupled to the quench signal caused by current fluctuations can be effectively filtered; the method can be applied to a quench protection system of the superconducting magnet, and protection misoperations caused by the voltage fluctuations can be effectively prevented; and the wavelet filter has great significance for the long-time stable operation of superconducting equipment.

Description

[0001] The invention belongs to the filter technology, and specifically uses the decomposition and reconstruction of the wavelet function to filter out the peak noise in the quench signal of the superconducting device. Background technique [0002] High-temperature superconducting materials have been developed rapidly in the past 20 years. High-temperature superconducting technology has broad application prospects in high-energy physics, weak magnetic measurement, military aerospace, rail transportation and other fields. Among them, in the field of electric power, the main applications of high-temperature superconductors include superconducting cables, superconducting motors, superconducting transformers, superconducting current limiters, and superconducting magnetic energy storage. Superconducting magnets are often the core equipment of superconducting power devices, and their manufacturing process is relatively complicated and expensive. When a superconducting power device i...

Claims

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Application Information

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IPC IPC(8): H03H17/02
Inventor 任丽郭树强廖于翔
Owner HUAZHONG UNIV OF SCI & TECH
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