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Method for regulating steam turbine

A steam turbine and steam technology, applied to the output of the engine, mechanical equipment, engine components, etc., can solve the problems of less adjustment time, inappropriate, inaccurate valve opening setting, etc., and achieve a simplified, reliable and fast adjustment circuit Adjustment effect

Inactive Publication Date: 2007-09-05
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, electric motor drives are not suitable for regulation of steam turbines because the regulation time is too small for the necessary valve movement adjustment and the setting of the valve movement is too inaccurate

Method used

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  • Method for regulating steam turbine
  • Method for regulating steam turbine
  • Method for regulating steam turbine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] Figure 1 schematically shows a steam turbine plant. The steam from the steam generator 3 is delivered to the steam turbine 1 via the input line 5 . A valve block 7 is arranged in the feed line 5 . The valve group 7 includes a first regulating valve 9 and a second regulating valve 11 . The valve group 7 also includes a first control valve 13 and a second control valve 15 . The amount of steam fed into the steam turbine 1 can be regulated via the valve block 7 . This takes place depending on the required power and rotational speed of the steam turbine 1 . This will be explained in detail with reference to FIGS. 2 and 3 .

[0023] FIG. 2 shows the valve block 7 shown in FIG. 1 with an associated regulating circuit. The controller 21 generates a controller output signal indicating a control difference as a function of the actual values ​​of the rotational speed and power and the setpoint value of the rotational speed or power, which is fed to a first servo amplifier 23...

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PUM

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Abstract

The method of governing a steam turbine entails feeding steam through at least three valves, whereby one of the valves (9,11) is operated as a regulating valve and at least two (13,15) as control valves which are electric motor actuated. The valve block may comprise two regulating valves and two control valves. An Independent claim is included for a steam turbine with a valve block to control steam inlet and which comprises a regulating valve and at least two control valves.

Description

technical field [0001] The invention relates to a method for regulating a steam turbine, wherein the steam of the steam turbine is supplied via at least three valves. Background technique [0002] A method for regulating a steam turbine is derived from the article "Practical Design of Speed ​​and Power Regulators for Steam Turbines" by Johannes Dastych and Heinz Unbehauen, Martin Bennauer and Heribert Werthes, ATP 41 (1999), No. 5. Steam turbines are regulated by speed and power. The speed and power regulation loop shown in Figure 2 includes the following functional blocks, such as speed regulator / power regulator (D- / LR), fresh steam regulating valve (FD-STV), cut-off regulating valve (AF-STV ), steam generator (DE) and turbine (T) and some basic blocks such as constant, ramp and stepped gears for input signals. The turbine unit is supplied with steam by a steam generator to generate electric power, and the steam input is regulated by a regulating valve to provide the nece...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01D17/14F01D17/18F01D17/24
CPCF05B2220/301F01D17/145F05D2220/31F05D2270/05F01D17/18F05B2270/103
Inventor H·厄恩豪森R·施坦博恩H·维尔特斯
Owner SIEMENS AG