Vibration key-phase signal preprocessing method of turbo generator set

Abstract

The invention relates to a vibration key-phase signal preprocessing method of a turbo generator set in a large-scale thermal power plant. The method comprises the following steps of: eliminating burr interference through voltage triggering; meanwhile, further eliminating the burr interference in key-phase pulses by means of the optoelectronic isolation of an integrated circuit; and finally shaping square waves. The processing method proposed by the invention can effectively eliminate various burr interferences, obtain accurate key-phase square-wave signals, achieve the aim of processing the key-phase signals of different kinds of sensors in different power plants and provide a site with key-phase signals which are more accurate and convenient to analyze.

Description

Technical field [0001] The invention relates to the field of vibration key phase measurement of a steam turbine generator set or a large rotary machine in a thermal power plant in an electric power system. Background technique [0002] Since the 20th century, steam turbine generator sets have played an increasingly important role in the development of industrial production and science and technology. A steam turbine unit is a large-scale rotating machine that converts the internal energy of the high-temperature and high-pressure steam into the mechanical energy of the rotor of the unit to drive other machines or drive the generator to generate electrical energy. Steam turbine units are important equipment in the industrial field, especially in the power industry, steam turbine units are key equipment. Due to the complexity of the structure and system of the steam turbine unit and the particularity of the operating environment, the failure rate of the steam turbine unit is relati...

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Problems solved by technology

[0003] With the development of my country's electric power industry, in recent years, the installed capacity of thermal power plants built by the country has continued to increase, and the length of the shafting of the units has increased, which has increased the possibility of vibration failures in steam turbine generator sets. The reliability, availability, and maintainability of equipment The problem of safety and safety is becoming more and more prominent. Once an accident occurs, it may cause the shafting to break and collapse. The consequences will be catastrophic and the loss will be extremely heavy. Therefore, higher requirements are put forward for the online monitoring of the vibration of the turbo-generator set.

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