Real-time monitoring method and monitoring system for thermal efficiency indices of generator set

Abstract

The invention relates to a real-time monitoring method and a monitoring system for thermal efficiency indices of a generator set. The monitoring system comprises a data terminal, a computer, a data acquisition instrument and 1-20 IPM (Intelligent Power Module) acquisition boards, wherein the computer is connected with the IPM acquisition boards through the data acquisition instrument, and the IPM acquisition boards are connected through data cables. Detection steps include: (1) original test data is acquired; (2) the accuracy of the acquired original test data is judged by an entropy production module; (3) a differential flow pressure signal in step (1) is converted into actual test condensed water flow Dns0, and is input into a thermal efficiency index module of the generator set; and (4) the thermal efficiency indices of the generator set are computed by the thermal efficiency index module of the generator set. On the basis of a data acquisition system, the thermal efficiency indices of the generator set are monitored in real time, a test is controlled, faults are checked, blindness and deviation in fault checking are reduced, the test cost is reduced, and the evaluating and monitoring accuracy and the reliability of a testing result are improved.

Description

technical field [0001] The invention belongs to the technical field of electric power production and equipment technical performance monitoring, and relates to a real-time monitoring method and a monitoring system for thermal economic indicators of a generating set. technical background [0002] The electric power industry is an important basic industry of my country's national economy. Coal-fired thermal power generation provides electric energy for social and economic development, while consuming a large amount of primary energy and water resources. As the earth's energy is becoming increasingly depleted, it is imperative to save energy and reduce consumption. Power generation companies are actively taking measures to save energy and reduce consumption. [0003] The steam turbine thermal performance test plays an important role in the operation optimization, condition monitoring and evaluation, technical transformation, economic and safety evaluation of the steam turbine. ...

AI Technical Summary

Problems solved by technology

There are problems such as pressure, temperature and flow inaccuracy in the DCS measurement points of the power plant. If the data are used to evaluate the thermal economic indicators of the unit, the accuracy and credibility of the evaluation data will be affected.

Most of the existing thermal tests use the data recorded by the DCS system or the data collector, and then take the average value of pressure, temperature, and flow to obtain the thermal economic index of the unit as a static economic index, and the certainty of the test results is poor. It cannot reflect the real-time economic indicators of the unit as a whole

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