Main steam pressure tracking optimization method for steam turbine

Abstract

The invention discloses a method for realizing main steam pressure tracking optimization of a steam turbine unit on the basis of performing mathematical modeling on thermal loss associated amount, and relates to a variable working condition optimization operation control technology for the steam turbine unit of a power station. The invention provides an association variable K between thermal loss and main steam pressure of the unit, and an operation tracking optimization model is established by taking the intermediate variable K as an objective function according to a plurality of core parameters of main steam flow rate, main steam pressure, main steam temperature, exhaust steam pressure of a high-pressure cylinder, exhaust steam temperature of the high-pressure cylinder, rotational speed of a small steam machine (or current of an electric pump), back pressure of steam condenser and the like, which are associated with the main steam pressure and the thermal loss. By performing modeling optimization on the intermediate variable K, a main steam pressure curve of the unit under different main steam flow rates can be determined, and the main steam pressure tracking control can be further performed. Weighed updating is performed on a characteristic database according to the related parameters of real-time operation, thereby enabling the main steam pressure curve to be closer and closer to a theoretical optimization operation curve of the unit.

Description

technical field

[0001] The invention relates to an optimal control method of thermal energy machinery, in particular to a variable working condition optimal operation control method of a steam turbine in a power station. Background technique

[0002] Energy conservation and emission reduction has gradually become a hot topic of global concern. Improving energy utilization and reducing energy consumption has become a historical task for researchers in all walks of life. As a supporting industry for industrial development and social and economic progress, electric power occupies a very important position in the energy structure, among which coal resources consumed by thermal power generation account for about half of the total coal consumption.

[0003] Due to the difference in different seasons and different times of industrial production electricity and civilian electricity, the difference is very obvious. In order to meet the greatest needs of users, the total installed ca...

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