Turbine main steam pressure operation curve and optimization method thereof

Abstract

The invention relates to variable working condition optimizing operation technologies of power station steam turbines, in particular to a turbine main steam pressure operation curve and an optimization method of the turbine main steam pressure operation curve. The approximate S-shaped main stream pressure operation curve is provided, and an original fixed-sliding-fixed main stream pressure operation mode is replaced. According to a turbine through-flow characteristic and a nozzle block physical structure, the smooth similar-S-shaped curved closer to an ideal optimal pressure operation curve is provided on the basis of the main stream pressure fixed-sliding-fixed operation curve, and the curve mainly comprises a high-load fixed pressure horizontal linear section, a low-load fixed pressure horizontal linear section, a middle-load sliding pressure inclined linear section and arc sections tangential to the sliding pressure inclined linear section, the high-load horizontal linear section and the low-load horizontal linear section. The main stream pressure operation curve similar to the S shape is determined by carrying out data mining on historical operation data, the original fixed-sliding-fixed main stream pressure operation curve is replaced, and unit pressure control is guided.

Description

technical field [0001] The invention relates to a pressure operation mode of thermal energy machinery, in particular to a main steam pressure-variable operation mode 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 capacity of electr...

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Problems solved by technology

[0005] At present, most research institutes are tinkering on the basis of the original "constant-slip-constant" pressure operation curve, and their research has not broken through the limitations of the "constant-slip-constant" pressure operation mode

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