CN102536349A - Steam turbine overspeed protection method and system - Google Patents

Steam turbine overspeed protection method and system Download PDF

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Publication number
CN102536349A
CN102536349A CN2011104250746A CN201110425074A CN102536349A CN 102536349 A CN102536349 A CN 102536349A CN 2011104250746 A CN2011104250746 A CN 2011104250746A CN 201110425074 A CN201110425074 A CN 201110425074A CN 102536349 A CN102536349 A CN 102536349A
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CN
China
Prior art keywords
steam turbine
control
control system
overspeed
control valve
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN2011104250746A
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Chinese (zh)
Inventor
M·科勒
H·朔伊尔曼
F·梅克勒
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General Electric Technology GmbH
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Alstom Technology AG
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Filing date
Publication date
Application filed by Alstom Technology AG filed Critical Alstom Technology AG
Publication of CN102536349A publication Critical patent/CN102536349A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
    • F01D21/02—Shutting-down responsive to overspeed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2220/00—Application
    • F05D2220/30—Application in turbines
    • F05D2220/31—Application in turbines in steam turbines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2270/00—Control
    • F05D2270/01—Purpose of the control system
    • F05D2270/02—Purpose of the control system to control rotational speed (n)
    • F05D2270/021—Purpose of the control system to control rotational speed (n) to prevent overspeed

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Turbines (AREA)

Abstract

The invention provides a steam turbine overspeed protection method and system. A method and system is disclosed for generating a steam turbine (15) overspeed control system fault alert. The method can include providing an overspeed control system (20) with a control valve (22) configured and located to adjust a speed of the steam turbine (15), the control valve (22) having a control position. The method can also include monitoring the control position of the control valve (22) and detecting a deloading event. Upon detection of a deloading event, a control system fault alert is generated when the control valve (22) does not achieve a predefined control position within a predefined time from the deloading event.

Description

Steam turbine overspeed protection method and system
Technical field
The disclosure relates generally to the steam turbine overspeed protection, and more specifically relates to the hypervelocity control under steam turbine unloading event situation.
Background technique
Typically, steam turbine is equipped with trip system, is no more than the hypervelocity value of definition to guarantee steam turbine speed.Can be accompanied by the hypervelocity that the steam turbine unloading event takes place possibly be the result of instantaneous rotational speed peak value, and said instantaneous rotational speed peak value is that dynamical system postpones that hysteresis causes with control system when taking new control position by the control system of turbo machine.Incident can be such as the unexpected decline of power demand detection less than the load incident that comes off, perhaps also can be such as circuit breaker is opened can detected incident.
Electrical network code (power grid codes) typically predefine between the control panel operated on the datum speed of restriction.Through the peak velocity in will joining between the control panel by the expection hypervelocity that the load incident of coming off causes, confirm that thus overspeed trip is provided with a little.
Be accompanied by unloading event, the power station is usually preferably suitable for running as soon as possible.Owing to after tripping operation, need spended time that steam turbine is turned round, so the number of times of limit trip preferably.
If build (build-up) resonance in for example in blade, taking place, then machine breakdown also possibly occur under the maximum rotor design speed.Resonate though build to damage in only when keeping the concrete speed of specific system, just typically in blade, taking place; And build in therefore during the instantaneous hypervelocity incident such as unloading event, not taking place usually and damage resonance; But the situation that still preferably makes blade be exposed to the speed outside the normal running interval minimizes, so that reduce potential blade stress.
Summary of the invention
The objective of the invention is before reaching critical hypervelocity, overcome the problem of the fault warning that the steam turbine of early alert overspeed control system is provided.
A kind of method that is used to produce the fault warning of steam turbine overspeed control system is provided on the one hand.This method comprises provides the overspeed control system with control valve, and said overspeed control system is configured and is positioned to the speed of steam regulation turbine, and wherein said control valve has the control position.If this method also comprises said control position, detection off-load incident and the said control valve of monitoring said control valve and in the scheduled time that begins from said off-load (deloading) incident, reaches the predetermined control position, then produces the control system fault warning.
On the other hand, said off-load incident is predetermined steam turbine speed.Aspect another, the said scheduled time is zero.
The parts that said therein steam turbine is the power station on the other hand, said detection comprises opening of the circuit breaker that detects said power station.
Comprise a kind of overspeed control system with control valve on the other hand, said overspeed control system is configured and is positioned to the speed of steam regulation turbine, and wherein said control valve has the control position.In the scheduled time that begins from said off-load incident, reach the predetermined control position if said overspeed control system also is configured to monitor said control position, detection off-load incident and the said control valve of said control valve, then produce the control system fault warning.
In conjunction with accompanying drawing, from following description with the example embodiment of the present invention shown in the mode of example, it is obvious that others of the present disclosure and advantage will become.
Description of drawings
Through example, with reference to accompanying drawing embodiment of the present disclosure has been described more fully hereinafter, in the accompanying drawings:
Fig. 1 is the schematic representation that comprises the exemplary steam power station of exemplary overspeed control system.
Embodiment
With reference now to accompanying drawing, describe exemplary embodiment of the present disclosure, wherein same reference character is used to represent same element in whole specification.In the following description, for illustrative purposes, set forth a plurality of specific detail to provide to thorough of the present disclosure.Yet, can not have to put into practice the disclosure under the situation of these specific detail, and the disclosure is not limited to disclosed exemplary embodiment here.
Fig. 1 shows the exemplary power station 10 with steam turbine 15.Power station 10 comprises the exemplary embodiment of overspeed control system 20, and said overspeed control system 20 is used under normal and upset situation, preventing or minimizing at least the hypervelocity of steam turbine 15.Power station 10 can comprise the steam turbine 15 with generator 16.It between generator 16 and electrical network circuit breaker 18.Control system 20 has controller 26 to be controlled input, compute control parameter and distributes these Control Parameter to be used for monitoring, thus the control unit of control such as control valve 22.
Exemplary embodiment provides a kind of method that is used to produce fault warning, and this fault warning provides steam turbine overspeed control system 20 not take anticipatory action and therefore can not prevent the alarm that steam turbine 15 exceeds the speed limit.Hypervelocity is defined as in the service speed band of steam turbine 15 or the steam turbine shaft speed on the operational design speed.
Illustrative methods comprises provides the overspeed control system 20 with control valve 22, and this overspeed control system 20 is configured and is positioned to the speed of steam regulation turbine 15.As shown in fig. 1, this can be for example realized by the control valve 22 that is arranged in the feed line of steam turbine 15.In another unshowned example, configuration and location are the steam turbine inter-stage ventilation valves that is arranged in the inter-stage air pipeline of steam turbine 15.
Illustrative methods also comprises the control position of measuring exemplary control valve 22.In the exemplary embodiment, monitoring relates to the control valve position signal that monitoring is produced by controller 26.In a further exemplary embodiment, monitoring relates to through using known method to monitor the working control position of control valve 22.
Illustrative methods also comprises the off-load incident that detects.In the exemplary embodiment, the off-load incident is the steam turbine speed of being scheduled to.Typically, this is between the control panel and/or the steam turbine speed on the top of operational design velocity window.In a further exemplary embodiment, when steam turbine 15 was the parts of power station 10, the off-load incident was the opening of circuit breaker 18 of power station 10.
Illustrative methods also comprises if control valve 22 does not reach the predetermined control position in the scheduled time that begins from the off-load incident, then produces the control system fault warning.Logic after fault warning is to be accompanied by off-load incident 12, and overspeed control system 20 configuration is used for predictable signal is sent to control valve 22, said control valve 22 conversely with measurable mode in response to this signal.If measurable action does not promptly realize transmitting control signal or realizing that control position, then possible reason are the overspeed control system faults.This exemplary fault can be that the fault by any part of overspeed control system 20 causes, and includes but not limited to the calculating of detection, the control response of off-load incident, to the signal of control valve 22 or control valve 22 itself.
Exemplary embodiment provides overspeed control system 20, and this overspeed control system 20 is arranged to the fault warning that produces overspeed control system.The said overspeed control system 20 that is configured and is positioned to the speed of steam regulation turbine 15 comprises control valve 22.Said control valve 22 has control position and the device that is used to monitor this control position.Said overspeed control system 20 also has the device that is used to detect the off-load incident.The example of this device is the circuit breaker status monitor.If also comprising, said overspeed control system 20 is used for not reaching the expectant control position and producing the device of control system fault warning at the time predefined inner control valve 22 that begins from the off-load incident.This device comprises the control logic that is positioned at controller 26.
Those skilled in the art are to be appreciated that and can specialize the present invention with other particular form.Current disclosed embodiment therefore be considered to all be exemplary and unrestricted.Represent scope of the present invention by appended claim rather than specification before, and in its meaning and scope and the whole changes in being equal to all be intended to comprise in this article.

Claims (5)

1. method that is used to produce the fault warning of steam turbine (15) overspeed control system comprises:
The have control valve overspeed control system (20) of (22) is provided, the speed that said overspeed control system (20) is configured and is positioned to regulate said steam turbine (15), said control valve (22) has the control position;
Monitor the said control position of said control valve (22);
Detect the off-load incident; And
If said control valve (22) is not realized the predetermined control position in the scheduled time that begins from said off-load incident, then produce the control system fault warning.
2. method according to claim 1, wherein said off-load incident are predetermined steam turbine speed.
3. method according to claim 2, the wherein said scheduled time is zero.
4. method according to claim 2, wherein said steam turbine (15) are the parts of power station (10) with generator (16), and wherein said detection off-load incident comprises opening of circuit breaker (18) of detecting said power station (10).
5. an overspeed control system (20), its configuration is used for realizing each described method of claim 1-4.
CN2011104250746A 2010-12-17 2011-12-16 Steam turbine overspeed protection method and system Pending CN102536349A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP10195773A EP2466077A1 (en) 2010-12-17 2010-12-17 Steam turbine overspeed protection
EP10195773.6 2010-12-17

Publications (1)

Publication Number Publication Date
CN102536349A true CN102536349A (en) 2012-07-04

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CN2011104250746A Pending CN102536349A (en) 2010-12-17 2011-12-16 Steam turbine overspeed protection method and system

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US (1) US20120151922A1 (en)
EP (1) EP2466077A1 (en)
JP (1) JP5535185B2 (en)
CN (1) CN102536349A (en)
DE (1) DE102011120692A1 (en)

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CN103590858A (en) * 2013-11-19 2014-02-19 中国神华能源股份有限公司 System and method for preventing rotating speed of turbine of power plant unit from being raised rapidly

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JP5964229B2 (en) * 2012-12-28 2016-08-03 三菱重工業株式会社 Power generation system
US10690002B2 (en) * 2014-01-22 2020-06-23 Thomas Revak Turbine overspeed trip test system
US10690003B2 (en) * 2014-01-22 2020-06-23 Thomas Revak Method of using a turbine overspeed trip testing system
CN105179025B (en) * 2015-09-02 2017-01-11 北京市可持续发展促进会 Rotation speed protection adjustment device of self-contained steam turbine
US10156153B2 (en) 2016-08-31 2018-12-18 General Electric Technology Gmbh Advanced tightness test evaluation module for a valve and actuator monitoring system
US10151216B2 (en) 2016-08-31 2018-12-11 General Electric Technology Gmbh Insulation quality indicator module for a valve and actuator monitoring system
US10066501B2 (en) 2016-08-31 2018-09-04 General Electric Technology Gmbh Solid particle erosion indicator module for a valve and actuator monitoring system
US10871081B2 (en) 2016-08-31 2020-12-22 General Electric Technology Gmbh Creep damage indicator module for a valve and actuator monitoring system
US10626749B2 (en) 2016-08-31 2020-04-21 General Electric Technology Gmbh Spindle vibration evaluation module for a valve and actuator monitoring system
US10544700B2 (en) 2016-08-31 2020-01-28 General Electric Technology Gmbh Advanced startup counter module for a valve and actuator monitoring system
US10233786B2 (en) 2017-03-28 2019-03-19 General Electric Technology Gmbh Actuator spring lifetime supervision module for a valve and actuator monitoring system
CN112228165A (en) * 2020-10-14 2021-01-15 北京博力威格智能传控设备有限公司 Speed regulating method and system for steam turbine and storage medium
CN112821355B (en) * 2020-11-25 2023-03-24 华能海南发电股份有限公司东方电厂 Generator-transformer unit protection combined-tripping steam turbine loop

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CN103590858A (en) * 2013-11-19 2014-02-19 中国神华能源股份有限公司 System and method for preventing rotating speed of turbine of power plant unit from being raised rapidly
CN103590858B (en) * 2013-11-19 2015-12-02 中国神华能源股份有限公司 Prevent the system and method that Power Plant turbine speed is ascended to heaven

Also Published As

Publication number Publication date
EP2466077A1 (en) 2012-06-20
JP5535185B2 (en) 2014-07-02
DE102011120692A1 (en) 2012-06-21
JP2012132447A (en) 2012-07-12
US20120151922A1 (en) 2012-06-21

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Application publication date: 20120704