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Phase-controlled arc-extinguishing coil fault detecitng method

An arc suppressing coil and fault detection technology, applied in the electrical field, can solve problems such as rough methods, low accuracy and reliability, and misjudgment, so as to reduce grounding misjudgments and misoperations, make accurate judgments, and ensure reliability and The effect of stability

Active Publication Date: 2007-11-14
SIEYUAN ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

Although this method can identify the type of fault and take corresponding actions, it is too rough and the identification is not detailed enough, which sometimes leads to misjudgment, and the accuracy and reliability are not high

Method used

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  • Phase-controlled arc-extinguishing coil fault detecitng method
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  • Phase-controlled arc-extinguishing coil fault detecitng method

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Embodiment Construction

[0015] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings: this embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following the described embodiment.

[0016] The arc-suppression coil connected in series with the thyristor on the secondary side is the phase-controlled arc-suppression coil. The phase-controlled arc-suppression coil is a well-known device at present, and the installation is the same as that of the ordinary arc-suppression coil. The phase-controlled arc suppression coil system mainly consists of several parts: arc suppression coil with secondary winding, two-phase parallel silicon controlled rectifier, arc suppression coil controller, voltage transformer, and current transformer. The schematic diagram o...

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Abstract

This invention discloses an electrical technology Phased - Petersen coil fault detection method. This invention will first Phased - Petersen coil system to the power grid system and then use Petersen coil controller neutral point of the voltage and current system, if detected elevated to neutral voltage settings, the control of its calculated system grounding resistance, the preliminary determination grounding system running state controller set for final adoption grounding type criterion determine the grounding system operating state control Phased - Petersen coil winding of the second on - SCR Kok change Petersen coil operations, if finally found a permanent grounding system, so that Petersen coil running away from the resonance point, and issued warning notice. The invention introduces discriminant grounding resistance auxiliary methods, giving full consideration to the system over-voltage neutral point of the various situations so that the types of fault detection more accurate.

Description

technical field [0001] The invention relates to a detection method in the field of electrical technology, in particular to a phase-controlled arc suppression coil fault detection method. Background technique [0002] In the arc suppressing coil grounding system, the SCR phase-controlled arc suppressing coil has been widely used for its fast response, wide adjustment depth (0-100%) and stepless adjustment of inductance. The phase-controlled arc suppressing coil is a transformer with a large leakage reactance (also known as high short-circuit impedance transformer type), which changes the equivalent reactance of the primary side of the arc suppressing coil by adjusting the SCR conduction angle shorted to the secondary side winding . When an abnormality occurs in the grounding system of the arc suppressing coil, finding out the cause of the abnormality in the system is the first problem to be solved. [0003] After searching the literature of the prior art, it was found that ...

Claims

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Application Information

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IPC IPC(8): G01R27/20G01R27/08H02H9/08
Inventor 王建忠倪浩宏姚瑞清
Owner SIEYUAN ELECTRIC CO LTD
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