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PT wire breakage diagnosis system and method

A disconnection diagnosis, line voltage technology, applied in the direction of measuring devices, instruments, measuring electricity, etc., can solve problems such as downtime, avoid damage, ensure normal production, improve reliability and anti-disturbance ability

Inactive Publication Date: 2015-01-21
ANHUI MA STEEL AUTOMATION INFORMATION TECH +1
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

At present, the excitation of various large-scale synchronous machines adopts constant power factor control, and its PT disconnection often occurs, and the resulting fault shutdown is not uncommon at home and abroad.

Method used

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  • PT wire breakage diagnosis system and method
  • PT wire breakage diagnosis system and method

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Embodiment Construction

[0019] Referring to the accompanying drawings, through the description of the embodiments, the specific embodiments of the present invention include the shape, structure, mutual position and connection relationship of each part, the function and working principle of each part, and the manufacturing process of the various components involved. And the method of operation and use, etc., are described in further detail to help those skilled in the art have a more complete, accurate and in-depth understanding of the inventive concepts and technical solutions of the present invention.

[0020] A PT disconnection diagnosis system, such as figure 1 As shown, the system includes: a multi-function meter, a controller and a rectifier device. The multi-function meter collects the signal of the synchronous motor, and there are three switches between the multi-function and the main motor to control the three-phase voltage. The signal collected by the multi-function meter passes through The ...

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Abstract

The invention relates to a PT wire breakage diagnosis system and method and belongs to the field of diagnosis of electric appliance parts. The system comprises a controller, a rectifying device and a multifunction table, wherein the multifunction table is connected with a main motor and used for collecting signals of the main motor. The multifunction table outputs parameter signals to the controller, and the controller calculates a current given value required by a motor system and sends the current given value to the rectifying device. The output end of the rectifying device and the controller form a closed loop, and the rectifying device outputs accurate field current required by the main motor. According to the system and the method, the system can be subjected to the PT wire breakage real-time monitoring during the operation of a synchronous machine, the problem that the motor and the equipment are damaged under the condition of PT wire breakage as the synchronous machine is in an asynchronous operation state due to no self-diagnostic program for PT wire breakage is solved.

Description

technical field [0001] The invention belongs to the application of new technologies, and relates to the field of excitation control system of a large-scale oxygen-generating synchronous motor and its operating state analysis and safety protection. Background technique [0002] For oxygen generators, the air compressor is the most important control equipment, and the air compressors of large oxygen generators are driven by synchronous machines. The control quality of the synchronous machine control system will directly affect its production and equipment safety, especially the power factor closed-loop control of the synchronous machine excitation system, and the presence or absence of its three-phase voltage will directly affect the calculation of relevant parameters in the excitation system, especially The power factor can lead to the change of the excitation current, so that the synchronous machine is in the state of under excitation and out of step, and finally the operati...

Claims

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Application Information

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IPC IPC(8): G01R31/02
Inventor 王光友苏国友张然罗宁
Owner ANHUI MA STEEL AUTOMATION INFORMATION TECH
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