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A Method for Optimizing Flow Characteristic Parameters of Steam Turbine Valves Based on Big Data Analysis

A technology of valve flow and characteristic parameters, applied in mechanical equipment, engine components, machines/engines, etc., can solve problems affecting the safe and stable operation of the unit, and achieve the effect of avoiding adverse effects, reducing workload, and eliminating the limitation of load operation range.

Active Publication Date: 2019-11-08
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The optimization range of parameters by this method is limited by the load change range that the unit can achieve during the test, and the test may also affect the safe and stable operation of the unit

Method used

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  • A Method for Optimizing Flow Characteristic Parameters of Steam Turbine Valves Based on Big Data Analysis
  • A Method for Optimizing Flow Characteristic Parameters of Steam Turbine Valves Based on Big Data Analysis
  • A Method for Optimizing Flow Characteristic Parameters of Steam Turbine Valves Based on Big Data Analysis

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Embodiment 1

[0041] In this embodiment, there are two valves for the steam turbine. The method for optimizing the flow characteristic parameters of the steam turbine valve based on big data analysis in this embodiment will be further described in detail below. Such as figure 1 As shown, the implementation steps of the steam turbine valve flow characteristic parameter optimization method based on big data analysis in this embodiment include:

[0042] 1) Obtain the historical operation data of the unit through the DCS (Distributed Control System, DCS for short) of the thermal power plant distributed control system;

[0043] 2) Obtain the operating data of the unit under stable working conditions through preliminary screening of the historical operation data of the unit;

[0044] 3) Through information mining of the obtained data under stable working conditions, the characteristic data of the unit under each operating condition are obtained Among them, N is the number of sampled data types...

Embodiment 2

[0072] This embodiment is basically the same as Embodiment 1, and the main difference is that the steam turbine in this embodiment has 4 adjustment gates, and the steps are the same as those in Embodiment 1, and will not be repeated here.

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Abstract

The invention discloses a big data analysis based optimization method for valve flow characteristic parameters of a steam turbine. The big data analysis based optimization method comprises the following steps of: obtaining historical operation data of an unit through a DCS and performing preliminary screening to obtain operation data under a stable working condition; then, performing information excavation to obtain characteristic data, under each operation working condition, of the unit; calculating practical steam inlet flow of the steam turbine through an improved Friuli Greig formula; and replacing a composite valve position instruction in original valve flow characteristic parameters in DEH system configuration with the practical steam inlet flow obtained by calculating, thereby completing optimization on valve flow characteristic parameters of the steam turbine. The big data analysis based optimization method disclosed by the invention does not need to perform a valve flow characteristic test on the steam turbine, greatly relieves workload, avoids the adverse effect, on safe stable operation of a unit, of the test, realizes optimization on valve flow characteristic parameters within the greatest historical operation zone of the unit, and eliminates the defect that the optimization range on parameters of the test method is limited by load change range of the unit during the test.

Description

technical field [0001] The invention relates to the automatic control technology of steam turbines, in particular to a method for optimizing flow characteristic parameters of steam turbine valves based on big data analysis. Background technique [0002] The steam turbine valve flow characteristic parameters refer to a group of parameters that can reflect the corresponding relationship between the steam flow entering the steam turbine and the opening of the high pressure valve of the steam turbine. When the valve flow characteristics parameters set in the steam turbine digital electro-hydraulic control system (Digital Electro-hydraulic Control System, DEH) match the actual valve flow characteristics, the steam turbine will show good controlled performance; otherwise, there may be Such as valve sloshing, large load fluctuations when single valve / sequential valve switching, load sudden change or slow adjustment when the unit changes load and frequency regulation, and sometimes ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01D17/10
CPCF01D17/10
Inventor 王志杰寻新朱晓星陈厚涛傅强
Owner STATE GRID CORP OF CHINA