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Method of optimizing steam distribution mode of steam turbine under the effect of backpressure

A technology of steam distribution method and optimization method, applied in mechanical equipment, engine components, machines/engines, etc., can solve the problems of not considering back pressure, and the efficiency of steam turbine cannot be optimized, and achieve the effect of avoiding frequent actions and improving internal efficiency.

Inactive Publication Date: 2013-09-25
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention aims to solve the problem that the current steam distribution optimization scheme does not consider the influence of back pressure, that is, the same steam distribution optimization curve is used in different seasons and at different times of the day, and the efficiency of the steam turbine cannot be optimized. Optimization method of steam distribution mode of steam turbine under influence

Method used

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  • Method of optimizing steam distribution mode of steam turbine under the effect of backpressure
  • Method of optimizing steam distribution mode of steam turbine under the effect of backpressure
  • Method of optimizing steam distribution mode of steam turbine under the effect of backpressure

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specific Embodiment approach 1

[0028] Specific implementation mode one: the optimization method of the steam distribution mode of the steam turbine under the influence of the back pressure of this embodiment includes the following contents:

[0029] 1. Test to determine the steam distribution optimization curve under a certain back pressure;

[0030] 2. Test to determine the steam distribution optimization curve under adjacent back pressure;

[0031] 3. Construct the switch boundary of steam distribution mode, so that the application of each steam distribution mode can be extended to a specific area;

[0032] 4. The corresponding steam distribution method is determined by the relative power or back pressure: when the point determined by the back pressure or power falls in a certain area, the steam distribution method corresponding to the area is adopted;

[0033] 5. If the relative power or back pressure changes, judge whether the change exceeds the margin and switch the steam distribution mode; if yes, de...

specific Embodiment approach 2

[0043] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that in step 1, the test determines the steam distribution optimization curve under a certain back pressure as follows:

[0044] Known back pressure p i (i=1,...,n-1) under steam turbine steam distribution optimization curve, Represents the power at the switching point of the steam distribution mode, Represents three steam distribution methods;

[0045] According to this turbine steam distribution optimization curve, at the back pressure p i , when the turbine power When using the steam distribution method when turbine power and When using steam distribution method When the turbine power When using the steam distribution method Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0046] Specific implementation mode three: the difference between this implementation mode and specific implementation mode one or two is that: in step two, the steam distribution optimization curve under the adjacent back pressure is tested and determined as follows:

[0047] Known adjacent back pressure p i+1 >p i (i=1,...,n-1) under steam turbine steam distribution optimization curve, similarly, Represents the power at the switching point of the steam distribution mode, Represents three steam distribution methods;

[0048] According to this steam distribution optimization curve, at the back pressure p i+1 , when the turbine power When using the steam distribution method When the turbine power and When using the steam distribution method When the turbine power When using the steam distribution method Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention relates to optimization on the steam distribution mode of a steam turbine, in particular to a method of optimizing the steam distribution mode of a steam turbine under the effect of backpressure, and aims to solve the problem that: since the effect of backpressure is not considered in the existing steam distribution optimization scheme, namely, same steam distribution optimization curves are used in different seasons and at different times in a day, the efficiency of the steam turbine cannot be optimal. The method includes: 1, determining steam distribution optimization curves under certain backpressure by testing; 2, determining steam distribution optimization curves under adjacent backpressures by testing; 3, constructing a steam distribution mode changeover interface; 4, determining a corresponding steam distribution mode according relative power or backpressure; and 5, judging whether changes exceed allowance or not and changing the steam distribution modes when the relative power or backpressure changes. The method is applicable to the field of steam turbine steam-distribution.

Description

technical field [0001] The invention relates to the optimization of steam distribution mode of steam turbine. Background technique [0002] A steam turbine is a rotating machine powered by steam and converts the energy of steam into mechanical work. It is widely used in modern large-scale power generation systems. In order to meet the user's actual demand for electricity consumption, the steam turbine must frequently adjust its power to keep the motor power in balance with the changing load of the outside world. The most direct and effective way to change the power of the steam turbine is to control its steam intake. When the steam intake changes, the power of the steam turbine will also change accordingly, that is, the steam distribution of the steam turbine. [0003] Generally speaking, there are two ways to distribute steam to a steam turbine, namely, single valve and multi-valve (multi-valve can also be called sequence valve). Single valve refers to the way that when s...

Claims

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Application Information

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IPC IPC(8): F01D17/10
Inventor 万杰宋崇明马世喜孟宪彬刘金福于达仁
Owner HARBIN INST OF TECH
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