An intelligent static state switch, a control system thereof, and a fault monitoring method

A static switch and control system technology, applied in system integration technology, information technology support system, circuit breaker testing, etc., can solve problems such as inability to determine where the fault occurred, unfavorable and effective maintenance, etc., to simplify task processing, prevent The effect of damage to the switch to ensure safe operation

Inactive Publication Date: 2014-03-26
NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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Problems solved by technology

[0003] The purpose of the present invention is to provide an intelligent static switch to solve the problem that the existing static switch has no fault self-inspection capability. Once the switch is abnormal, it cannot judge what fault has occurred, which is not conducive to timely and effective maintenance.

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  • An intelligent static state switch, a control system thereof, and a fault monitoring method
  • An intelligent static state switch, a control system thereof, and a fault monitoring method

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Embodiment Construction

[0020] The intelligent static switch is used for fast disconnection and connection of AC lines, and has the function of self-diagnosis of switch failure. Such as figure 1 As shown, the intelligent static switch includes a static switch main circuit and a control system, the control system includes a DSP processor and a thyristor temperature measurement circuit connected to the DSP processor, a thyristor current zero-crossing trigger circuit, a thyristor fault detection circuit, and a working status signal Output circuit, switch working status, warning display module, DSP processor is also connected with switch control signal input circuit and / or switch manual operation module, DSP processor includes A / D conversion module; one side of the main circuit of the static switch is provided with a set of Current transformers, the signal output terminals of the group of current transformers are connected to the thyristor fault detection circuit, and the static switch main circuit is re...

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Abstract

The invention relates to an intelligent static state switch, a control system thereof, and a fault monitoring method. In operation of an intelligent static state switch, a built-in control system of the intelligent static state switch samples the temperature value of each thyristor and the current value of each phase of the static state switch in real time, and uploads the temperature values and the current values to a processor. The processor carries out comparison between the temperature value of each thyristor and the current value of each phase of the static state switch respectively with corresponding normal scope values. If the temperature value of each thyristor and the current value of each phase of the static state switch are all in the scope of the normal scope values, the switch continues to operate; and if one of the value is not in the scope of the normal scope values, the running state of the switch is judged to be abnormal, and accordingly the intelligent static state switch is immediately turned off, and the judging result is uploaded to a host computer. According to the invention, rapid self-detection of switch faults can be realized; once an abnormity occurs in the operation of the switch, the fault can be timely detected, and measures can be adopted timely to reduce fault losses to the minimum.

Description

technical field [0001] The invention belongs to the technical field of low-voltage electrical appliances, and relates to an intelligent static switch, its control system, and a fault monitoring method. Background technique [0002] Static switch, also known as static switch, is a non-contact switch. It is an AC switch composed of two thyristors connected in reverse parallel. Its closing and opening are controlled by a logic controller. The static switch is an important switching device used in the technical field of AC low-voltage electrical appliances for automatic, smooth and fast conversion. The static switch is used to connect the microgrid and the public grid, which is the automatic, smooth and fast switching between the grid-connected and off-grid modes of the microgrid. Important device for fast switching. At present, ordinary static switches do not have perfect self-inspection capabilities. Once the switch is abnormal, the switch itself cannot judge which fault has ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00H02J3/38H02J13/00G01R31/327
CPCY02E40/72Y04S10/12Y02E40/70
Inventor 苏海滨张璐王光政刘江伟代鹏陈振华
Owner NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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