Steam turbine sliding pressure optimization control method based on multi-dimension curved surface

An optimized control and steam turbine technology, which is applied in the direction of engine control, mechanical equipment, engine components, etc., can solve problems affecting the economy of the unit, and achieve the effect of avoiding unsafe effects and improving economy

Active Publication Date: 2017-02-15
STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST +4
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to solve the problem of affecting the economy of the unit when the back pressure changes during the sliding pressure operation of the steam turbine, and propose a steam turbine sliding pressure optimiz...

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  • Steam turbine sliding pressure optimization control method based on multi-dimension curved surface
  • Steam turbine sliding pressure optimization control method based on multi-dimension curved surface
  • Steam turbine sliding pressure optimization control method based on multi-dimension curved surface

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Embodiment

[0029] Such as Figure 1 to Figure 3 As shown, a steam turbine sliding pressure optimization control method based on multi-dimensional surfaces includes the following steps: 1) Select a number of conventional load points in the operating range of the load unit to conduct a comparative test on the thermal efficiency of the steam turbine and optimize the sliding pressure operation; 2) According to the unit back pressure correction curve, the sliding pressure data under different back pressures are obtained; 3) According to the data regression analysis, the sliding pressure control function is obtained; 4) The optimization result is realized in DCS, that is, the obtained multi-dimensional sliding pressure surface By making the function into the DCS of the unit, the optimal control of the sliding pressure of the steam turbine on the multi-dimensional surface can be realized.

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Abstract

The invention discloses a steam turbine sliding pressure optimization control method based on a multi-dimension curved surface. In order to solve the problems that a sliding pressure model of a steam turbine is single-variable (generator power) function usually based on unit designed backpressure in the load-variable sliding-pressure operation process of a power plant steam turbine, the unit operates under the condition with deviation from the unit designed backpressure at most time, the previous control model is free of consideration of influence of the unit backpressure factor and certain influence is generated on the sliding-pressure operation economy of the unit, the invention discloses a novel sliding pressure control method based on a multi-dimension curved surface. The sliding pressure control model obtained by the method has consideration on the influence on main steam pressure when the unit backpressure deviates from the designed value so as to ensure that the steam turbine can operate in an optimal sliding-pressure manner; the operation economy of the unit is effectively improved.

Description

technical field [0001] The invention relates to the field of steam turbine control in thermal power plants, in particular to a steam turbine sliding pressure optimization control method based on multi-dimensional curved surfaces. Background technique [0002] With the continuous expansion of power grid capacity, the peak-to-valley difference of power load is also increasing, resulting in more and more peak-shaving time for units. In order to improve the operating economy, sliding pressure operation is the mode often used during the low-load operation of the unit during peak regulation. [0003] At present, during the variable load sliding pressure operation of the steam turbine, the sliding pressure control model adopted is mostly a curve function, that is, a single variable (generator power) function, which takes the unit load as a variable and is aimed at rated parameters (back pressure, air temperature) derived from the following. However, due to the influence of temper...

Claims

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Application Information

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IPC IPC(8): F01D17/00
CPCF01D17/00F05D2270/20F05D2270/71
Inventor 范鑫秦建明刘静宇石峰张清甫王建华范文旺张盼刘培栋张磊
Owner STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST
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