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Method of controlling a steam turbine and steam turbine apparatus

A steam turbine and steam technology, which is applied to mechanical equipment, steam engine installations, engine starting, etc., and can solve problems such as error margin and inaccurate estimation.

Active Publication Date: 2020-10-27
A S EN ANSALDO SVILUPPO ENERGIA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this estimate is not very accurate and has a large margin of error
So, on the one hand, limited accuracy requires maintaining conservative practices in configuration design for load bearing and temperature rises that detract from device performance
On the other hand, even a reasonably conservative approach still cannot with sufficient confidence prevent the occurrence of anomalous conditions resulting from possible hazards or damage due to internal stresses in the rotor

Method used

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  • Method of controlling a steam turbine and steam turbine apparatus
  • Method of controlling a steam turbine and steam turbine apparatus
  • Method of controlling a steam turbine and steam turbine apparatus

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0013] Such as figure 1 As shown, a combined cycle power plant for generating electrical energy includes a gas turbine unit 3, a steam turbine 5, two generators 8 and 9 respectively coupled to the gas turbine unit 3 and steam turbine 5 and connected to a distribution network (not shown) , a heat recovery boiler 10 (used as a steam generator), a condenser 11 and a control device 12 . The plant 1 also has an actuator assembly 13 and an actuator assembly 14, and the control device 12 executes actions for each actuator assembly to control the gas turbine group 3 and the steam turbine 5 respectively.

[0014] The gas turbine unit 3 generates a hot exhaust gas stream, which is sent to the heat recovery boiler 10 and used to generate steam.

[0015] The steam turbine 5 described in the example includes a high-pressure part 5a and a medium-low pressure part 5b, receiving a high-pressure steam flow Q from a heat recovery boiler 10 HP and medium and low pressure steam flow Q IP , the...

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Abstract

The invention provides a method of controlling a steam turbine and steam turbine equipment. The method of controlling a steam turbine comprises: defining a simplified model of the rotor (5c) of the steam turbine in the form of a homogenous and isotropic cylinder; from the parameters of the simplified model and the parameters of the steam supplied to the steam turbine (5) temperature value, determine the stress distribution in the rotor (5c); compare the determined stress in the rotor (5c) with the stress threshold (σ TH ) for comparison; and based on the stress determined in the rotor (5c) and the stress threshold (σ TH ) for comparison, controlling the steam turbine (5).

Description

technical field [0001] The invention relates to a method of controlling a steam turbine and a steam turbine installation. Background technique [0002] It is well known that the start-up phase of a steam turbine proves critical due to system inertia and the forces exerted on the rotor by considerable temperature fluctuations. The temperature fluctuations are due to the fact that the steam temperature should rise to a steady state value in a relatively short time considering the mass and geometry of the rotor. [0003] In order to prevent problems and conditions that could lead to rotor damage or premature aging, arrangements for load bearing and steam temperature rise during plant start-up have been investigated, which guarantee, at least theoretically, avoiding the occurrence of dangerously high stresses. However, it is expedient to maintain monitoring of the rotor temperature during operation and to implement control actions to reduce stress levels if necessary. [0004]...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01D19/00F01D19/02
CPCF01D19/00F01D19/02F01K7/165F01K13/02F05D2260/81
Inventor 阿莱西奥·达历伞德罗保罗·莱沃拉托费代里科·卡尔佐拉里
Owner A S EN ANSALDO SVILUPPO ENERGIA