Online verification method for thermal monitoring instrument of power plant

Abstract

The invention discloses an online verification method for a thermal monitoring instrument of a power plant, which belongs to the field of thermal control of the power plant. The system comprises a standard device, an online thermotechnical instrument, a data acquisition system, a thermotechnical monitoring system and a verification analysis system. The standard device can measure parameters such as temperature, pressure and flow during operation of a power plant on line, the standard device is connected with the data acquisition system and realizes real-time data transmission, the online thermotechnical instrument is connected with the thermotechnical monitoring system, data of the data acquisition system and the thermotechnical monitoring system are transmitted to the verification analysis system in real time, and time synchronization is kept. Compared with the prior art, online verification of the thermotechnical monitoring instrument in operation of a power plant is realized, on the premise of no shutdown, real-time calibration of the online thermotechnical instrument can be flexibly completed, disassembly and reassembly of the instrument are avoided, accuracy and reliability of monitoring data of a unit in operation are improved, and safe and stable operation of the unit is guaranteed.

Description

Technical field [0001] The present invention belongs to the field of thermal control of the power plant, in particular to a power plant thermal monitoring meter online calibration system and check method, and is used for the normal operation of the unit to realize the pressure instrument, temperature meter, flow meter and other online verification. Background technique [0002] The thermal instrument is an important part of the power plant. It is an indispensable device to realize the automation of power plant automation. It is also an important foundation for safe and stable operation of the power plant. Especially the current industry encourages and promotes the development of digital power plants and smart power plants and thermal instruments. Sex and reliability play a positive and important role. [0003] Laboratory quantity traceability is an important means of ensuring accurate and reliable thermal instrument. The prior art generally uses cycle verification / calibration t...

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Problems solved by technology

[0003] Laboratory value traceability is an important means to ensure the accuracy and reliability of thermal instruments. The current technology generally uses periodic verification / calibration to complete the calibration of thermal instruments. This method needs to be carried out when the unit is shut down. This method has the following disadvantages. First, it is only for independent instrument calibration, and it is impossible to carry out the whole system calibration, and it is difficult to judge the specific source of data deviation. The timeliness and flexibility of the test are poor; the third is that the difference between the laboratory environmental conditions and the field environmental conditions will bring large additional errors

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