Comprehensive failure diagnostic system for triphase controllable thyristor rectifier

Abstract

The invention discloses a comprehensive failure diagnostic system for a triphase controllable thyristor rectifier. The comprehensive failure diagnostic system consists of a rectified voltage sampling circuit, an alternating current input voltage sampling circuit, a synchronizing signal capturing circuit, a protection signal detecting circuit, a failure display alarming circuit, a host computer communicating circuit and the like. By the specific failure diagnostic method, through the use of the comprehensive failure diagnostic system for the triphase controllable thyristor rectifier, the failure of a power tube is positioned, and the maintenance time is greatly shortened. The failure diagnostic system of the rectifier mainly comprises the rectified voltage sampling circuit, the alternating current input voltage sampling circuit, the synchronizing signal capturing circuit, the protection signal detecting circuit, the failure display alarming circuit, the host computer communicating circuit and the like. The failure diagnostic system of the rectifier adopts a failure diagnostic method supporting a vector machine and has higher diagnosis accuracy and good applicability for a diode and different kinds of loads. The software adopts modularization programming and C language programming, and compared with assembly language, the comprehensive failure diagnostic system has the advantages of high readability, high transportability and the like.

Description

technical field [0001] The invention relates to a fault diagnosis system, in particular to a comprehensive fault diagnosis system for a thyristor rectifier. Background technique [0002] Today, with the rapid development of power electronics technology, rectifiers are used in important links such as industry, communication, and power generation. About 75% of the electric energy in developed countries is used after power electronic conversion. Because rectifiers are used in many industries, users have different degrees of familiarity with rectifiers and different working environments. For example, in the field of new energy power generation, due to photovoltaic, wind Renewable power sources such as renewable energy and ocean energy all work in an open-air environment, and the related protection and maintenance work will be more difficult and costly. In addition, there are many types of faults in the rectification device itself. Therefore, the rectification device, which is u...

AI Technical Summary

Problems solved by technology

About 75% of the electric energy in developed countries is used after power electronic conversion. Because rectifiers are used in many industries, users have different degrees of familiarity with rectifiers and different working environments. For example, in the field of new energy power generation, due to photovoltaic, wind , ocean energy and other renewable power sources all work in the open air environment, the related protection and maintenance work will be more difficult and the cost will be higher, and there are many types of faults in the rectification device itself

Therefore, it is usually used as a power supply or motor drive to rectify the device used in key production links. Once a failure occurs, the economic loss will be significant, and even cause casualties.

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