Online leakage measuring method and system for circulating work medium of thermal power set

A technology of circulating working fluid and thermal power units, which is applied in the direction of comprehensive factory control, comprehensive factory control, electrical program control, etc., and can solve the problem of difficult online measurement of circulating working fluid leakage

Active Publication Date: 2019-05-03
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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Problems solved by technology

[0006] The present invention aims at the problem that it is difficult to measure the circulating working medium leakage of thermal power units in operation, and proposes an online measurement method and measurement system for the circulating working medium leakage of thermal power units. , according to the theory of working fluid circulation in the...

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  • Online leakage measuring method and system for circulating work medium of thermal power set
  • Online leakage measuring method and system for circulating work medium of thermal power set
  • Online leakage measuring method and system for circulating work medium of thermal power set

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Embodiment Construction

[0032] Taking the rated working condition of a supercritical 600MW unit as an example, when the external leakage of the main pipeline is 20t / h, the pipeline efficiency is 98.3%, and the coal consumption for power supply is 290.4g / kw h. Not counting the leakage of the main pipeline, the coal consumption increases 2g / kw·h, the pipeline efficiency dropped by 0.7%. It can be seen that ignoring the leakage of the main pipeline and setting the pipeline efficiency as a fixed value will cause errors when evaluating the thermal economy of the whole plant, which should be paid attention to.

[0033] Such as figure 1 Shown is a flow chart of a method for on-line measurement of circulating working fluid leakage of a thermal power unit, which specifically includes the following steps:

[0034] 1) Working condition judgment and data acquisition:

[0035] Read the required primary parameters from the distributed control system DCS of the unit and the plant-level monitoring and communicatio...

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Abstract

The invention relates to an online leakage measuring method and system for a circulating work medium of a thermal power set. Data is selected from a set DCS (Distributed Control System) and a thermalpower plant level SIS (Supervisory Information System), under the technical condition that a primary measuring point for an existing steam parameter of the set is not changed, necessary primary parameters are selected, data is processed and the condition stability is determined, characteristic data is stored in a database, a set working medium circulation theory is used to decompose the set circulating work medium into a heat absorption working medium and a do-work working medium, the leakage quantity of the circulating work flow of the set is calculated according to the characteristic data byusing a thermal power plant principle, and thus, the leakage quantity of the circulating work medium of the thermal power set and main heat economy indexes of the set are displayed online. The systemchecks positive and negative balance of the coal consumption rate of the set correspondingly, the digital level of online monitoring for the operational energy consumption of the power plant is improved, the energy saving and emission reduction state of the set is reflected comprehensively, and the method and system has significance in energy saving in a thermal power enterprise.

Description

technical field [0001] The invention relates to a steam power cycle power generation technology, in particular to an on-line measurement method and a measurement system for the leakage of circulating working fluid of a thermal power unit. Background technique [0002] With the continuous deepening of my country's power system reform, the marketization of the power industry has gradually improved. The development of network communication, big data storage, mining, and analysis technology has accelerated the process of digitalization of power plants. [0003] The "Thirteenth Five-Year Plan for Electric Power Development" clearly states that it is necessary to establish an internal energy audit mechanism for electric power companies, and continue to carry out technical and management energy-saving work, so as to maintain the predetermined state of deep energy-saving and emission-reduction of thermal power plants. The National Development and Reform Commission, the Ministry of ...

Claims

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Application Information

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IPC IPC(8): G05B19/418
CPCY02P90/02
Inventor 石奇光沈阳白博博
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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