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Fault detection system of quench type superconductivity fault current-limiting device and detection method thereof

A fault current limiter and fault detection technology, applied in the direction of instruments, measuring electricity, measuring devices, etc., can solve problems such as malfunctions, and achieve the effect of avoiding malfunctions, easy to understand software programming, and accurate and reliable actions

Inactive Publication Date: 2008-05-21
TIANJIN UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, if the triggering method of the superconducting fault current limiter (SFCL) only relies on the peak current, it is easy to cause malfunction

Method used

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  • Fault detection system of quench type superconductivity fault current-limiting device and detection method thereof
  • Fault detection system of quench type superconductivity fault current-limiting device and detection method thereof
  • Fault detection system of quench type superconductivity fault current-limiting device and detection method thereof

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Embodiment

[0023] Embodiment: a kind of fault detection system (see Fig. 1) of quench type superconducting fault current limiter, it is characterized in that it is made of full-wave rectification module, logic circuit module, analog-to-digital conversion module, superconducting control switch module, The current change rate detection module is composed of the input terminal of the full wave rectification module connected to the external power grid through the current transformer, and its output terminal is connected to the analog-to-digital conversion module, the current change rate detection module and the superconducting control switch module. The output terminals of the digital conversion module and the current change rate detection module are connected to the logic circuit module, and then connected to the superconducting control switch module, and the output terminal of the superconducting control switch module controls the action of the superconducting fault current limiter.

[0024...

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Abstract

The present invention provides a fault detection system and a detection method for a quench-type superconducting fault current limiter. The present invention is characterized in that the present invention consists of a full wave rectification module, a logic circuit module, an analog-digital conversion module, a superconducting control switch module and a current rate detecting module. The working method of the present invention is as follows: (1) signal collection, (2) signal treatment and transmission, (3) analog-digital conversion and output, (4) current limiter operation determination. The present invention has the advantages that as follows: 1. a hardware apparatus is combined with a computer software programming; the hardware apparatus is of simple design and the software programming is easy to be understood; 2. a di / dt fault current rate is adopted to control the operation of the superconducting fault current limiter, which avoids the incorrect operation under the traditional control method; 3. the analog-digital conversion module is cooperated with the logic circuit, so the operation of the superconducting fault current limiter is more accurate and reliable; 4. the data calculation and data processing ability with high speed of the computer is used, so the reliability of the control system is greatly improved.

Description

(1) Technical field: [0001] The invention belongs to the technical field of control and detection of a quench type superconducting fault current limiter in a power system, in particular to a fault detection system and a detection method of a quench type superconducting fault current limiter. (two) background technology: [0002] With the continuous expansion of the scale of the power system, when the line fails, whether the current limiting device can act quickly and effectively has become one of the technical hotspots concerned by relevant people. The trigger current (Triggle Level) of the superconducting fault current limiter is the peak value of the critical current of the superconductor. When the short-circuit impact current is greater than the trigger current, the superconductor changes from the superconducting state to the normal state to limit the short-circuit current, so that the limited short-circuit impact The current does not exceed the instantaneous breaking cap...

Claims

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Application Information

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IPC IPC(8): G01R31/00
Inventor 周雪松王辉马幼捷周永兵龚娟何杰侯明张智勇
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
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