JP2000192804A - Turbine ventilation controller - Google Patents

Turbine ventilation controller

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Publication number
JP2000192804A
JP2000192804A JP10368962A JP36896298A JP2000192804A JP 2000192804 A JP2000192804 A JP 2000192804A JP 10368962 A JP10368962 A JP 10368962A JP 36896298 A JP36896298 A JP 36896298A JP 2000192804 A JP2000192804 A JP 2000192804A
Authority
JP
Japan
Prior art keywords
steam
signal
control valve
command signal
turbine
Prior art date
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
JP10368962A
Other languages
Japanese (ja)
Inventor
Ayako Zako
綾子 座古
Takeyoshi Sato
豪芳 佐藤
Satoshi Akimaru
智 秋丸
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toshiba Corp filed Critical Toshiba Corp
Priority to JP10368962A priority Critical patent/JP2000192804A/en
Publication of JP2000192804A publication Critical patent/JP2000192804A/en
Pending legal-status Critical Current

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Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]

Landscapes

  • Control Of Turbines (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)

Abstract

PROBLEM TO BE SOLVED: To minimize thermal stress given to a steam turbine so as to enable early restart. SOLUTION: A minute opening command signal generating and outputting means 40B is provided with a timer 44 outputting an ON signal after a predetermined time limit by an ON signal of a logical sum operation means 43 computing a logical sum of an FCB generation signal 41 and a load shut-off generation signal 42 and a logical product operation means 46 outputting a steam governing valve minute opening command signal 47 due to the formation of a logical product of the other steam governing valve minute opening permission condition signal 45 and a signal of the timer 44. A minute opening post-opening command signal generating and outputting means 50B is provided with a first condition formation judging means 51 outputting a first ON signal, a second condition formation judging means 52 outputting a second ON signal, a third condition formation judging means 53, a fourth condition formation judging means 54 outputting a fourth ON signal, a fifth condition formation judging means 55 outputting a fifth ON signal, and a logical product operation means 56 outputting a steam governing valve minute opening post-opening command signal 57 due to the formation of logical product by inputting all these signals.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、コンバインドサイ
クル発電設備等に用いられる蒸気タービンへの通気を制
御するタービン通気制御装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a turbine ventilation control device for controlling ventilation to a steam turbine used in a combined cycle power generation facility or the like.

【０００２】[0002]

【従来の技術】図７は、コンバインドサイクル発電設備
の全体系統図を示したものである。2. Description of the Related Art FIG. 7 shows an overall system diagram of a combined cycle power generation facility.

【０００３】図７において、蒸気タービン１と発電機２
とガスタービン３と空気圧縮機４とは、単軸５によって
連結して構成している。In FIG. 7, a steam turbine 1 and a generator 2
The gas turbine 3 and the air compressor 4 are connected by a single shaft 5.

【０００４】空気圧縮機４は、単軸５の回転によって空
気を取込み圧縮した空気を燃焼器７へ送り込む。燃焼器
７は、燃料と圧縮空気とによって生成される燃焼ガスを
ガスタービン３へ送るように構成され、ガスタービン３
の単軸５を回転させる。ガスタービン３により得られた
排ガスは、排熱回収ボイラ（ＨＲＳＧ）８へ送られ、蒸
気タービン１へ供給するための主蒸気を発生させる。[0004] The air compressor 4 takes in air by the rotation of the single shaft 5 and sends the compressed air to the combustor 7. The combustor 7 is configured to send the combustion gas generated by the fuel and the compressed air to the gas turbine 3, and the gas turbine 3
Is rotated. The exhaust gas obtained by the gas turbine 3 is sent to an exhaust heat recovery boiler (HRSG) 8 to generate main steam to be supplied to the steam turbine 1.

【０００５】排熱回収ボイラ８と蒸気タービン１は、蒸
気配管１０によって接続して、蒸気配管１０には蒸気加
減弁１１を配置し、蒸気配管１０から分岐して復水器１
２へ接続するタービンバイパス配管１３にはタービンバ
イパス弁１４を配置している。[0005] The exhaust heat recovery boiler 8 and the steam turbine 1 are connected by a steam pipe 10, and a steam control valve 11 is arranged in the steam pipe 10.
A turbine bypass valve 14 is arranged in a turbine bypass pipe 13 connected to the second bypass pipe 2.

【０００６】そして、蒸気タービン１には、蒸気タービ
ンの第１段メタル温度を検出するＳＴ第１段メタル温度
検出器１６が配置され、ガスタービン３の排ガス配管９
には、ガスタービン排ガス温度検出器１８が配置され、
蒸気配管１０には、主蒸気温度検出器１９及び主蒸気圧
力検出器２０が配置され、これらの検出器からの検出信
号が通気制御装置３０へ入力するようになっている。[0006] An ST first stage metal temperature detector 16 for detecting the first stage metal temperature of the steam turbine is disposed in the steam turbine 1.
Is provided with a gas turbine exhaust gas temperature detector 18,
A main steam temperature detector 19 and a main steam pressure detector 20 are arranged in the steam pipe 10, and detection signals from these detectors are input to the ventilation control device 30.

【０００７】さらに、通気制御装置３０からの蒸気加減
弁開度信号が蒸気加減弁１１へ出力するように構成され
る一方、通気制御装置３０からのタービンバイパス弁制
御信号がタービンバイパス弁１４へ出力するように構成
されている。Further, a steam control valve opening signal from the ventilation control device 30 is configured to be output to the steam control valve 11, while a turbine bypass valve control signal from the ventilation control device 30 is output to the turbine bypass valve 14. It is configured to be.

【０００８】なお、図示する蒸気タービン１のＨＰは、
高圧蒸気タービン、ＩＰは中圧蒸気タービン、ＬＰは低
圧タービンを示し、図示する各接続線は（注）に示すも
のである。The steam turbine 1 shown in FIG.
A high-pressure steam turbine, IP indicates a medium-pressure steam turbine, and LP indicates a low-pressure turbine, and each connection line shown in the drawing is indicated by (note).

【０００９】まず、ガスタービン３の排ガスにより熱交
換を行う排熱回収ボイラ８の発生蒸気である主蒸気は、
蒸気加減弁１１を開することにより蒸気タービン１へ供
給され、蒸気タービン１で仕事をし、蒸気タービン１の
駆動力によって発電機２を駆動させる。First, main steam which is generated steam of the exhaust heat recovery boiler 8 which performs heat exchange with the exhaust gas of the gas turbine 3 is:
When the steam control valve 11 is opened, the steam is supplied to the steam turbine 1, the work is performed by the steam turbine 1, and the generator 2 is driven by the driving force of the steam turbine 1.

【００１０】タービンバイパス弁１４は、起動時の蒸気
タービン通気前の主蒸気及び停止時の主蒸気及び所内単
独運転のＦＣＢ発生時、負荷遮断発生時の主蒸気を復水
器１２へ逃がし、主蒸気圧力検出器２０によって得られ
る主蒸気圧力を制御する。The turbine bypass valve 14 allows the main steam before venting the steam turbine at the start, the main steam at the time of stoppage, the FCB at the time of sole operation in the station, and the main steam at the time of load shedding to the condenser 12 to release the main steam. The main steam pressure obtained by the steam pressure detector 20 is controlled.

【００１１】図８は、図７に示す第１の例示である通気
制御装置３０の部分構成図である。FIG. 8 is a partial configuration diagram of the ventilation control device 30 of the first example shown in FIG.

【００１２】図８において、関数演算手段３１は、図７
に示す主蒸気温度検出器１９によって検出された主蒸気
温度検出信号１９ａと主蒸気圧力検出器２０によって検
出された主蒸気圧力検出信号２０ａとを入力して所定の
演算を行いＳＴ第１段蒸気温度信号３２を出力するもの
である。また、ミスマッチ判定手段３３は、図７に示す
ＳＴ第１段メタル温度検出器１６によって検出されたＳ
Ｔ第１段メタル温度検出信号１６ａとＳＴ第１段蒸気温
度信号３２との偏差信号を演算し、偏差信号が規定値以
内の場合に、ＯＮ信号を出力するものである。In FIG. 8, the function operation means 31
The first stage steam is inputted by inputting the main steam temperature detection signal 19a detected by the main steam temperature detector 19 and the main steam pressure detection signal 20a detected by the main steam pressure detector 20 shown in FIG. It outputs a temperature signal 32. Further, the mismatch determination means 33 detects the S level detected by the ST first stage metal temperature detector 16 shown in FIG.
A deviation signal between the T first stage metal temperature detection signal 16a and the ST first stage steam temperature signal 32 is calculated, and an ON signal is output when the deviation signal is within a specified value.

【００１３】論理積演算手段３６は、他の蒸気タービン
通気条件信号３４のＯＮ信号と、ミスマッチ判定手段３
３のＯＮ信号と、温度マッチング制御完了信号３５のＯ
Ｎ信号によって蒸気タービン通気条件が成立し、蒸気加
減弁１１を開き通気を開始するものである。The AND operation means 36 is connected to the ON signal of another steam turbine ventilation condition signal 34 and the mismatch determination means 3
3 ON signal and the temperature matching control completion signal 35 signal O
The steam turbine ventilation condition is established by the N signal, and the steam control valve 11 is opened to start ventilation.

【００１４】ここで、他の蒸気タービン通気条件信号３
４は、温度マッチング制御完了信号３５及びミスマッチ
判定手段３３以外の信号で、負荷遮断されているが、主
蒸気圧力値や発電機出力値が所定値、あるいは、タービ
ンバイパス弁１４の開度が所定値か等の各条件から、負
荷遮断後の再起動のために必要な条件信号である。Here, another steam turbine ventilation condition signal 3
Reference numeral 4 denotes a signal other than the temperature matching control completion signal 35 and the mismatch determination means 33. The load is interrupted. However, the main steam pressure value or the generator output value is a predetermined value, or the opening degree of the turbine bypass valve 14 is a predetermined value. It is a condition signal necessary for restarting after load shedding from each condition such as value.

【００１５】また、温度マッチング制御完了信号３５
は、蒸気タービン１の熱応力軽減のため、通気前に目標
のガスタービン排ガス温度とする制御で、実際のガスタ
ービン排ガス温度が「制御設定値±α℃」となる場合に
出力される完了信号である。A temperature matching control completion signal 35
Is a control signal for controlling the target gas turbine exhaust gas temperature before venting in order to reduce the thermal stress of the steam turbine 1, and a completion signal output when the actual gas turbine exhaust gas temperature becomes "control set value ± α ° C". It is.

【００１６】以上の構成で、まず、図示しない手段によ
ってガスタービンの排ガスが制御され、主蒸気温度が制
御されるいわゆる温度マッチング制御がされる。主蒸気
温度検出信号１９ａと主蒸気圧力検出信号２０ａとが関
数演算手段３１によって所定演算され得られたＳＴ第１
段蒸気温度信号３２がミスマッチ判定手段３３へ出力さ
れる。ミスマッチ判定手段３３では、ＳＴ第１段蒸気温
度信号３２とＳＴ第１段メタル温度検出信号１６ａとが
取り込まれ両者の偏差が演算され、得られた偏差信号が
所定の規定範囲内の場合にＯＮ信号が論理積演算手段３
６へ出力される。論理積演算手段３６では、他の蒸気タ
ービン通気条件信号３４とミスマッチ判定手段３３から
の信号と温度マッチング制御完了信号３５とを入力して
論理積が成立すると、蒸気タービン通気条件成立として
通気が開始される。With the above arrangement, first, so-called temperature matching control in which the exhaust gas of the gas turbine is controlled by means not shown and the main steam temperature is controlled. The first steam ST signal obtained by subjecting the main steam temperature detection signal 19a and the main steam pressure detection signal 20a to predetermined calculation by the function calculation means 31
The stage steam temperature signal 32 is output to the mismatch determining means 33. The mismatch determination means 33 takes in the ST first-stage steam temperature signal 32 and the ST first-stage metal temperature detection signal 16a, calculates a deviation between the two, and turns ON when the obtained deviation signal is within a predetermined specified range. Signal is AND operation means 3
6 is output. When the logical product operation means 36 receives the other steam turbine ventilation condition signal 34, the signal from the mismatch determination means 33, and the temperature matching control completion signal 35 to form a logical product, the ventilation is started as the steam turbine ventilation condition is satisfied. Is done.

【００１７】[0017]

【発明が解決しようとする課題】しかしながら、従来の
タービン通気制御装置には、次の問題がある。However, the conventional turbine ventilation control device has the following problems.

【００１８】まず、負荷遮断後、あるいは、ＦＣＢ後に
通気条件が成立しない場合や遅れる場合がある。First, after the load is cut off or after the FCB, the ventilation condition may not be satisfied or may be delayed.

【００１９】すなわち、図７及び図８に示す構成では、
負荷遮断発生、所内単独運転のＦＣＢ発生により、蒸気
加減弁１１が閉し、蒸気タービン１へ主蒸気が供給され
ない状態となる。この状態で、ＳＴ第１段メタル温度
は、負荷遮断、ＦＣＢ発生前とほぼ同じ温度が保たれる
一方、主蒸気温度はガスタービン３が無負荷または所内
負荷等の微少負荷となりガスタービン排ガス温度が低下
し、排熱回収ボイラ８の熱吸収が低下し、主蒸気温度が
低下するため、ＳＴ第１段蒸気温度信号３２も急激に低
下する。That is, in the configuration shown in FIGS. 7 and 8,
Due to the occurrence of the load shedding and the occurrence of the FCB in the station alone operation, the steam control valve 11 is closed, and the main steam is not supplied to the steam turbine 1. In this state, the temperature of the first stage metal of the ST is substantially the same as that before the load was cut off and the FCB was generated, while the main steam temperature became a small load such as no load or internal load on the gas turbine 3 and the gas turbine exhaust gas temperature Is reduced, the heat absorption of the exhaust heat recovery boiler 8 is reduced, and the main steam temperature is reduced, so that the ST first stage steam temperature signal 32 is also rapidly reduced.

【００２０】従って、従来の通気制御装置３０は、負荷
遮断後、ＦＣＢ後の再起動時においては、ＳＴ第１段蒸
気温度信号３２とＳＴ第１段メタル温度検出信号１６ａ
の温度差（ミスマッチ）が大きく、温度マッチング制御
によっても主蒸気温度検出信号１９ａが目標の温度にな
らず、ミスマッチ条件が成立しない場合やミスマッチの
成立が遅れ再起動が遅れる場合がある。Therefore, the conventional ventilating control device 30 is configured such that the ST first stage steam temperature signal 32 and the ST first stage metal temperature detection signal 16a
Is large, the main steam temperature detection signal 19a does not reach the target temperature even by the temperature matching control, and the mismatch condition is not satisfied or the mismatch is delayed and the restart may be delayed.

【００２１】これを解決するために図９に示す第２の例
の通気制御装置３０Ａのように図８に対して主蒸気温度
検出信号１９ａがガスタービン排ガス温度検出信号１８
ａから規定値を減じた値より高くなったことを条件に、
通常のミスマッチ条件が成立していなくても通気操作に
入る回路（主蒸気温度＞ＧＴ排ガス温度−規定値）を付
加する構成とすることが考えられる。In order to solve this problem, the main steam temperature detection signal 19a is different from the gas turbine exhaust gas temperature detection signal 18 in FIG. 8 like the ventilation control device 30A of the second example shown in FIG.
provided that it is higher than the value obtained by subtracting the specified value from a,
It is conceivable to add a circuit (main steam temperature> GT exhaust gas temperature−specified value) that enters the ventilation operation even if the normal mismatch condition is not satisfied.

【００２２】しかしながら、ＦＣＢ・負荷遮断後の再起
動において、ミスマッチ条件をバイパスして通気を行う
場合、ミスマッチが大きい状態で通気が行われるため、
やはり、蒸気タービンの熱応力が大きく、寿命消費が多
くなるという課題があった。However, when restarting after FCB / load shedding, if ventilation is performed while bypassing the mismatch condition, ventilation is performed in a state where the mismatch is large.
After all, there is a problem that the thermal stress of the steam turbine is large and the life consumption is increased.

【００２３】そこで、本発明は、ＦＣＢ・負荷遮断後に
おいて、ミスマッチを小さくし、蒸気タービンへの熱応
力を軽減し、寿命消費の少ない早期の再起動を可能とす
るタービン通気制御装置を提供することを目的とする。Accordingly, the present invention provides a turbine ventilation control device which reduces mismatch, reduces thermal stress on a steam turbine, and enables early restart with less life consumption after FCB / load shedding. The purpose is to:

【００２４】[0024]

【課題を解決するための手段】請求項１の発明は、コン
バインドサイクル発電設備等に設ける蒸気タービンへの
通気を制御するタービン通気制御装置において、系統負
荷遮断発生後、あるいは、所内単独運転後の再起動時に
微量の通気をする条件が充足した場合に蒸気加減弁微開
指令信号を蒸気加減弁開度信号として出力する微開指令
信号生成出力手段と、蒸気加減弁微開指令信号が生成出
力された後に、少なくとも主蒸気温度が蒸気タービンの
メタル温度に基づいて定められた規定範囲内にある場合
に蒸気加減弁微開後開指令信号を蒸気加減弁開度信号と
して出力する微開後開指令信号生成出力手段とを設ける
ようにしたものである。この手段によれば、系統負荷遮
断等の後に直ちに微少量の通気条件が成立すると、微少
量の通気をするための蒸気加減弁微開指令信号が生成出
力される。これにより、蒸気タービンの蒸気温度の急激
な低下が微少な通気によって抑制される。さらに、この
場合、微少な通気であるので蒸気タービンへの熱応力が
最小限に押さえられる。そして、緩やかに低下する蒸気
タービンメタル温度と微少な通気によって緩やかに低下
する蒸気タービン蒸気温度との偏差が規定範囲内となっ
て蒸気加減弁微開後開指令信号が出力される。これによ
って、負荷遮断後に蒸気タービン蒸気温度と蒸気タービ
ンメタル温度との差が小さな状態で通気することができ
るので、蒸気タービンへ与える熱応力を最小とすること
ができ、寿命消費の少ない再起動が早期にできる。According to a first aspect of the present invention, there is provided a turbine ventilation control device for controlling ventilation to a steam turbine provided in a combined cycle power generation facility or the like after a system load interruption occurs or after a single operation in a plant. A slight opening command signal generating and outputting means for outputting a steam control valve slight opening command signal as a steam control valve opening degree signal when a condition for a small amount of ventilation at the time of restart is satisfied, and generating and outputting a steam controlling valve slight opening command signal. After that, when at least the main steam temperature is within a specified range determined based on the metal temperature of the steam turbine, a slightly-opened steam opening / closing valve is output as a steam opening / closing valve opening signal. Command signal generating and outputting means. According to this means, when a minute amount of ventilation condition is satisfied immediately after the system load is cut off, a steam control valve minute opening command signal for minute amount ventilation is generated and output. As a result, a rapid decrease in the steam temperature of the steam turbine is suppressed by the minute ventilation. Further, in this case, since the ventilation is very small, the thermal stress on the steam turbine is minimized. Then, a deviation between the steam turbine metal temperature that gradually decreases and the steam turbine steam temperature that gradually decreases due to the slight ventilation is within a specified range, and an open command signal after the steam control valve is slightly opened is output. As a result, it is possible to ventilate in a state where the difference between the steam turbine steam temperature and the steam turbine metal temperature is small after the load is cut off, so that the thermal stress applied to the steam turbine can be minimized, and restart with less life consumption can be performed. Can be done early.

【００２５】請求項２の発明は、請求項１記載のタービ
ン通気制御装置において、微開指令信号生成出力手段
は、系統負荷遮断発生、あるいは、所内単独運転後の再
起動時に所定の時限後で、かつ、蒸気加減弁微開許可条
件が充足した場合に、蒸気加減弁微開指令信号を出力す
る手段、あるいは、系統負荷遮断発生後、あるいは、所
内単独運転後の再起動時にタービン回転数が整定し、か
つ、蒸気加減弁微開許可条件を充足した場合に、蒸気加
減弁微開指令信号を出力する手段を設けるようにしたも
のである。この手段によれば、負荷遮断後の所定の時限
後で、かつ、蒸気加減弁微開許可条件の充足の場合、あ
るいは、ガスタービン回転数整定した場合にのみ蒸気加
減弁微開指令信号が生成出力されるので、誤って蒸気加
減弁微開指令信号が出力され、蒸気タービンへ大きな熱
応力を与えるおそれを防止することができる。According to a second aspect of the present invention, in the turbine ventilation control device according to the first aspect, the slightly-open command signal generating and outputting means generates a system load cut-off, or after a predetermined time limit upon restarting after the in-house isolated operation. In addition, when the steam control valve slight opening permission condition is satisfied, a means for outputting a steam control valve slight opening command signal, or when the system load is interrupted, or when the turbine speed is restarted after the station is operated alone. A means is provided for outputting a steam control valve slight opening command signal when the condition is set and the steam control valve slight opening permission condition is satisfied. According to this means, the steam control valve slight opening command signal is generated only after a predetermined time period after the load is cut off and when the conditions for permitting the steam control valve slight opening are satisfied, or only when the gas turbine speed is settled. Since this is output, it is possible to prevent a possibility that a steam control valve slight opening command signal is output by mistake and a large thermal stress is applied to the steam turbine.

【００２６】請求項３の発明は、請求項１記載のタービ
ン通気制御装置において、微開後開指令信号生成出力手
段は、過熱度、主蒸気圧力等の主蒸気条件が規定範囲内
にある場合に第１ＯＮ信号を出力する第１条件成立判定
手段と、主蒸気の温度が蒸気タービンのメタル温度に基
づいて定められた規定範囲内にある場合に、第２ＯＮ信
号を出力する第２条件成立判定手段と、発電機負荷が初
負荷以上である場合に第３ＯＮ信号を出力する第３条件
成立判定手段と、ガスタービンの排ガス温度設定値が蒸
気タービンメタル温度に基づいて定められた規定範囲内
にある場合に、第４ＯＮ信号を出力する第４条件成立判
定手段と、タービンバイパス弁開度が規定値以上である
場合に第５ＯＮ信号を出力する第５条件成立判定手段
と、蒸気加減弁微開指令信号が生成出力された後に、第
１ＯＮ信号乃至第５ＯＮ信号の５信号の内で、少なくと
も第２ＯＮ信号と第５ＯＮ信号とを入力した場合に蒸気
加減弁微開後開指令信号を出力し、あるいは、５信号の
全てのＯＮ信号を入力した場合に蒸気加減弁微開後の開
指令信号を出力する信号演算手段とを設けるようにした
ものである。この手段によれば、系統負荷遮断等の後に
直ちに微量の通気条件が成立すると、微少量の通気をす
るための蒸気加減弁微開指令信号が生成出力される。こ
れにより、蒸気タービンの蒸気温度の急激な低下が微少
な通気によって抑制される。さらに、この場合、微少な
通気であるので蒸気タービンへの熱応力が最小限に押さ
えられる。そして、緩やかに低下する蒸気タービンメタ
ル温度と微少な通気によって緩やかに低下する蒸気ター
ビン蒸気温度との偏差が規定範囲内となって第２ＯＮ信
号が出力される。また、タービンバイパス弁開度が規定
値以上の場合、第５ＯＮ信号が出力される。これによ
り、蒸気加減弁微開後開指令信号が出力される。あるい
は、第１ＯＮ信号乃至第５ＯＮ信号の全てが信号演算手
段へ入力され、蒸気加減弁微開後開指令信号が出力され
る。これによって、負荷遮断後に蒸気タービン蒸気温度
と蒸気タービンメタル温度との差が小さな状態で通気す
ることができるので、蒸気タービンへ与える熱応力を最
小とすることができ、寿命消費の少ない早期の再起動が
できる。According to a third aspect of the present invention, in the turbine ventilation control device according to the first aspect, the after-opening command signal generating and outputting means is provided when the main steam conditions such as the degree of superheat and the main steam pressure are within a specified range. Condition determination means for outputting a first ON signal to the second condition, and second condition satisfaction determination for outputting a second ON signal when the temperature of the main steam is within a specified range determined based on the metal temperature of the steam turbine. Means, a third condition fulfillment determination means for outputting a third ON signal when the generator load is equal to or more than the initial load, and an exhaust gas temperature set value of the gas turbine falling within a specified range determined based on the steam turbine metal temperature. In some cases, a fourth condition satisfaction determining means for outputting a fourth ON signal, a fifth condition satisfaction determining means for outputting a fifth ON signal when the turbine bypass valve opening is equal to or greater than a prescribed value, and a steam control valve slight opening After the command signal is generated and output, among the five signals of the first ON signal to the fifth ON signal, when at least the second ON signal and the fifth ON signal are input, an open command signal is output after the steam control valve is slightly opened, Alternatively, a signal calculating means for outputting an open command signal after the steam control valve is slightly opened when all five ON signals are inputted is provided. According to this means, when a small amount of ventilation condition is satisfied immediately after the system load is cut off, a steam control valve slight opening command signal for performing a small amount of ventilation is generated and output. As a result, a rapid decrease in the steam temperature of the steam turbine is suppressed by the minute ventilation. Further, in this case, since the ventilation is very small, the thermal stress on the steam turbine is minimized. Then, a deviation between the steam turbine metal temperature that gradually decreases and the steam turbine steam temperature that gradually decreases due to the minute ventilation is within a specified range, and the second ON signal is output. In addition, when the opening degree of the turbine bypass valve is equal to or more than the specified value, the fifth ON signal is output. As a result, an open command signal is output after the steam control valve is slightly opened. Alternatively, all of the first to fifth ON signals are input to the signal calculation means, and an open command signal after the steam control valve is slightly opened is output. As a result, the ventilation can be performed with a small difference between the steam turbine steam temperature and the steam turbine metal temperature after the load is cut off. Can be started.

【００２７】請求項４の発明は、請求項１乃至請求項３
記載のいずれかのタービン通気制御装置において、微開
指令信号生成出力手段は、蒸気加減弁微開指令信号の上
限側を所定の変化率で制限して蒸気加減弁開度指令信号
として出力する微開レートリミット手段を備える一方、
微開後開指令信号生成出力手段は、蒸気加減弁開度指令
信号の上限側を所定の変化率で制限して蒸気加減弁開度
指令信号として出力する微開後レートリミット手段とを
設けるようにしたものである。この手段によれば、蒸気
加減弁微開指令信号の上限側が所定の変化率で制限され
て出力されるので、蒸気タービンへの通気量が急激に増
加することがなく、蒸気タービンメタル温度の変化率も
小さくでき、蒸気タービンへ与える熱応力を軽減するこ
とができる。また、微開後の蒸気加減弁開指令信号の上
限側が所定の変化率で制限されて出力され、全開に近い
蒸気加減弁開指令信号がそのまま出力されないので、蒸
気タービンへの通気量が急激に増加することがない。従
って、蒸気タービンメタル温度の変化率も小さくでき、
蒸気タービンへ与える熱応力を軽減することができる。[0027] The invention of claim 4 is the invention of claims 1 to 3.
In any of the turbine ventilation control devices described above, the fine opening command signal generation and output means restricts the upper limit side of the steam control valve slight opening command signal at a predetermined rate of change and outputs the result as a steam control valve opening command signal. While having an open rate limit means,
The slightly-opened post-opening command signal generation and output means may include post-slightly-opened rate limiting means for limiting the upper limit of the steam control valve opening command signal at a predetermined rate of change and outputting as a steam control valve opening command signal. It was made. According to this means, since the upper limit side of the steam control valve slight opening command signal is limited and output at a predetermined rate of change, the amount of ventilation to the steam turbine does not increase rapidly, and the change of the steam turbine metal temperature does not occur. The rate can be reduced, and the thermal stress applied to the steam turbine can be reduced. In addition, the upper limit side of the steam control valve open command signal after the slight opening is output with a limited rate of change at a predetermined rate, and the steam control valve open command signal close to full open is not output as it is, so the amount of air flow to the steam turbine is rapidly increased. Does not increase. Therefore, the rate of change of the steam turbine metal temperature can be reduced,
Thermal stress applied to the steam turbine can be reduced.

【００２８】請求項５の発明は、請求項１乃至請求項３
記載のいずれかのタービン通気制御装置において、微開
指令信号生成出力手段は、蒸気加減弁微開指令信号の上
限側を所定の設定変化率で制限して蒸気加減弁開度信号
として出力する微開レートリミット手段と、蒸気タービ
ンメタル温度に応じた予め定める関数に従って微開レー
トリミット手段に設定される設定変化率を設定する関数
演算手段とを備える一方、微開後開指令信号生成出力手
段は、蒸気加減弁微開後開指令信号の上限側を所定の設
定変化率で制限して蒸気加減弁開度信号として出力する
微開後レートリミット手段と、蒸気タービンメタル温度
に応じた予め定める関数に従って微開後レートリミット
手段に設定される設定変化率を設定する関数演算手段と
を設けるようにしたものである。この手段によれば、請
求項４の発明の作用に加えて蒸気タービンメタル温度に
応じて制限する変化率を増減することができるので、熱
応力を小さく維持できる状態の場合に変化率の制限を小
さくして早期に負荷を得ることができ、実情に即した再
起動ができる。The invention of claim 5 is the first to third aspects of the present invention.
In any of the turbine ventilation control devices described above, the fine opening command signal generation and output means restricts the upper limit side of the steam control valve slight opening command signal at a predetermined set change rate and outputs the result as a steam control valve opening degree signal. Open rate limit means and function calculating means for setting a set change rate set in the fine open rate limit means according to a predetermined function according to the steam turbine metal temperature, while the post-fine open command signal generation and output means are provided. A rate control means for limiting the upper limit of the steam control valve after slight opening command signal at a predetermined set rate of change and outputting as a steam control valve opening signal, and a predetermined function corresponding to the steam turbine metal temperature. And a function calculating means for setting a set change rate set in the rate limiting means after the slight opening in accordance with the following. According to this means, in addition to the effect of the invention of claim 4, the rate of change limited according to the temperature of the steam turbine metal can be increased or decreased. Therefore, when the thermal stress can be kept small, the rate of change is limited. The load can be obtained early by making it smaller, and the restart can be performed according to the actual situation.

【００２９】請求項６の発明は、請求項１乃至請求項３
記載のいずれかのタービン通気制御装置において、微開
指令信号生成出力手段は、蒸気加減弁微開指令信号の上
限側を所定の設定変化率で制限して蒸気加減弁開度信号
として出力する微開レートリミット手段と、蒸気タービ
ンメタル温度と蒸気タービン蒸気温度との偏差に応じた
予め定める関数に従って微開レートリミット手段に設定
される設定変化率を設定する関数演算手段とを備える一
方、微開後開指令信号生成出力手段は、蒸気加減弁微開
後開指令信号の上限側を所定の設定変化率で制限して蒸
気加減弁開度信号として出力する微開後レートリミット
手段と、蒸気タービンメタル温度と蒸気タービン蒸気温
度との偏差に応じた予め定める関数に従って微開後レー
トリミット手段に設定される設定変化率を設定する関数
演算手段とを設けるようにしたものである。この手段に
よれば、請求項４の発明の作用に加えて蒸気タービンメ
タル温度と蒸気タービン蒸気温度との偏差に応じて制限
する変化率が増減することができるので、熱応力を小さ
く維持できる状態の場合に変化率の制限を小さくして早
期に負荷を得ることができ、一律に変化率を制限するの
に比べて実情に即した早期の再起動ができる。The invention of claim 6 is the first to third aspects of the present invention.
In any of the turbine ventilation control devices described above, the fine opening command signal generation and output means restricts the upper limit side of the steam control valve slight opening command signal at a predetermined set change rate and outputs the result as a steam control valve opening degree signal. Open rate limit means, and a function calculating means for setting a set change rate set in the slightly open rate limit means according to a predetermined function corresponding to a deviation between the steam turbine metal temperature and the steam turbine steam temperature. The post-opening command signal generating and outputting means includes a post-fine opening rate limiting means for restricting the upper limit side of the post-opening control signal after a slight opening of the steam control valve at a predetermined set change rate and outputting as a steam control valve opening signal. Function calculating means for setting a set change rate set in the rate limit means after slightly opening according to a predetermined function corresponding to a deviation between the metal temperature and the steam turbine steam temperature. It is obtained by way. According to this means, in addition to the function of the invention of claim 4, the rate of change limited according to the deviation between the steam turbine metal temperature and the steam turbine steam temperature can be increased or decreased, so that the thermal stress can be kept small. In the case of (1), it is possible to obtain a load early by reducing the limitation of the change rate, and it is possible to restart more quickly in accordance with the actual situation as compared with uniformly limiting the change rate.

【００３０】請求項７の発明は、請求項１乃至請求項３
記載のいずれかのタービン通気制御装置において、微開
指令信号生成出力手段は、蒸気加減弁微開指令信号の上
限側を所定の設定変化率で制限して蒸気加減弁開度信号
として出力する微開レートリミット手段と、蒸気タービ
ンメタル温度とこの蒸気タービンメタル温度と蒸気ター
ビン蒸気温度との偏差とに応じた予め定める関数に従っ
て微開レートリミット手段に設定される設定変化率を設
定する関数演算手段とを備える一方、微開後開指令信号
生成出力手段は、蒸気加減弁微開後開指令信号の上限側
を所定の設定変化率で制限して蒸気加減弁開度信号とし
て出力する微開後レートリミット手段と、蒸気タービン
メタル温度とこの蒸気タービンメタル温度と蒸気タービ
ン蒸気温度との偏差とに応じた予め定める関数に従って
微開後レートリミット手段に設定される設定変化率を設
定する関数演算手段とを設けるようにしたものである。
この手段によれば、請求項４の発明の作用に加えて蒸気
タービンメタル温度とこの蒸気タービンメタル温度と蒸
気タービン蒸気温度との偏差とに応じて制限する変化率
が増減することができるので、熱応力を小さく維持でき
る状態の場合に変化率の制限を小さくして早期に負荷を
得ることができ、一律に変化率を制限するのに比べて実
情に即した早期の再起動ができる。The invention of claim 7 is the first to third aspects of the present invention.
In any of the turbine ventilation control devices described above, the fine opening command signal generation and output means restricts the upper limit side of the steam control valve slight opening command signal at a predetermined set change rate and outputs the result as a steam control valve opening degree signal. Open rate limit means, and function calculating means for setting a set change rate set in the fine open rate limit means according to a predetermined function corresponding to a steam turbine metal temperature and a deviation between the steam turbine metal temperature and the steam turbine steam temperature. On the other hand, the slightly-opened post-opening command signal generation and output means limits the upper limit of the steam control valve open-after-opening command signal at a predetermined set change rate and outputs as a steam control valve opening degree signal. Rate limiting means, and a rate limit after slight opening according to a predetermined function corresponding to a steam turbine metal temperature and a deviation between the steam turbine metal temperature and the steam turbine steam temperature. Is obtained as provided with the function calculating means sets the setting change rate set in bets means.
According to this means, in addition to the effect of the invention of claim 4, the rate of change limited according to the steam turbine metal temperature and the deviation between the steam turbine metal temperature and the steam turbine steam temperature can be increased or decreased. In a state where the thermal stress can be kept small, the load can be obtained early by reducing the limit of the rate of change, so that the restart can be performed earlier according to the actual situation as compared with uniformly limiting the rate of change.

【００３１】[0031]

【発明の実施の形態】以下、本発明の実施の形態につい
て図面を参照して説明する。Embodiments of the present invention will be described below with reference to the drawings.

【００３２】図１は、本発明の第１実施の形態を示すタ
ービン通気制御装置の構成図である。FIG. 1 is a configuration diagram of a turbine ventilation control device according to a first embodiment of the present invention.

【００３３】図１において、タービンの通気制御装置３
０Ｂは、微開指令信号生成出力手段４０Ｂと微開後開指
令信号生成出力手段５０Ｂとから構成されている。In FIG. 1, a turbine air flow control device 3
OB comprises a slightly open command signal generation and output means 40B and a slightly open command signal generation and output means 50B.

【００３４】微開指令信号生成出力手段４０Ｂは、ＦＣ
Ｂ発生信号４１と負荷遮断発生信号４２との論理和を演
算する論理和演算手段４３と、この論理和演算手段４３
のＯＮ信号によってタイマスタートして所定の短い時限
後にＯＮ信号を出力するタイマ４４と、他の蒸気加減弁
微開許可条件信号４５とタイマ４４の信号との論理積を
演算して論理積の成立によって蒸気加減弁微開指令信号
４７を出力する論理積演算手段４６とを設けている。The slightly open command signal generation / output means 40B
OR operation means 43 for calculating the OR of the B generation signal 41 and the load shedding generation signal 42;
The timer is started by the ON signal of the timer 44, and an ON signal is output after a predetermined short time period, and a logical product of the other steam control valve slight opening permission condition signal 45 and the signal of the timer 44 is calculated to form a logical product. And an AND operation means 46 for outputting a steam control valve slight opening command signal 47.

【００３５】一方、微開後開指令信号生成出力手段５０
Ｂは、第１条件成立判定手段５１と第２条件成立判定手
段５２と第３条件成立判定手段５３と第４条件成立判定
手段５４と第５条件成立判定手段５５と論理積演算手段
５６とを設けている。On the other hand, an open command signal generating / outputting means 50 after a slight opening.
B includes a first condition satisfaction determination means 51, a second condition satisfaction determination means 52, a third condition satisfaction determination means 53, a fourth condition satisfaction determination means 54, a fifth condition satisfaction determination means 55, and an AND operation means 56. Provided.

【００３６】ここで、第１条件成立判定手段５１は、過
熱度と主蒸気圧力等の主蒸気条件が規定範囲内の場合に
第１ＯＮ信号を出力する。この条件は過熱度と主蒸気圧
力等の主蒸気条件が規定範囲内にあれば、蒸気タービン
１へ流入する蒸気が適切な状態だからである。第２条件
成立判定手段５２は、主蒸気温度が蒸気タービンメタル
温度のパラメータの規定範囲内の場合に、第２ＯＮ信号
を出力する。この条件は微開した後にミスマッチ条件を
成立させ、蒸気加減弁１１を全開方向とするためのもの
であるからである。第３条件成立判定手段５３は、発電
機負荷が初負荷以上の場合に、第３ＯＮ信号を出力す
る。この条件は、従来の「その他の蒸気タービン通気条
件に」に含まれるものである。第４条件成立判定手段５
４は、ガスタービン排ガス温度制御設定値が蒸気タービ
ンメタル温度のパラメータの規定範囲内の場合、第４Ｏ
Ｎ信号を出力する。第５条件成立判定手段５５は、ター
ビンバイパス弁開度が規定値以上の場合に、第５ＯＮ信
号を出力する。論理積演算手段５６は、これら第１条件
成立判定手段５１と第２条件成立判定手段５２と第３条
件成立判定手段５３と第４条件成立判定手段５４と第５
条件成立判定手段５５とからの全信号を入力して論理積
の成立によって蒸気加減弁微開後開指令信号５７を出力
する。Here, the first condition satisfaction judging means 51 outputs a first ON signal when main steam conditions such as superheat and main steam pressure are within a specified range. This is because if the main steam conditions such as the degree of superheat and the main steam pressure are within the specified range, the steam flowing into the steam turbine 1 is in an appropriate state. The second condition satisfaction determination means 52 outputs a second ON signal when the main steam temperature is within the specified range of the parameter of the steam turbine metal temperature. This is because the condition is satisfied in order to set the steam control valve 11 to the fully open direction after slightly opening the mismatch condition. The third condition satisfaction determination means 53 outputs a third ON signal when the generator load is equal to or more than the initial load. This condition is included in the conventional “other steam turbine ventilation conditions”. Fourth condition satisfaction determination means 5
4 indicates that the gas turbine exhaust gas temperature control set value is within the specified range of the parameter of the steam turbine metal temperature,
Outputs N signal. The fifth condition satisfaction determination means 55 outputs a fifth ON signal when the opening degree of the turbine bypass valve is equal to or greater than a specified value. The AND operation means 56 includes a first condition satisfaction determination means 51, a second condition satisfaction determination means 52, a third condition satisfaction determination means 53, a fourth condition satisfaction determination means 54,
All the signals from the condition satisfaction determination means 55 are input, and a logical control is performed to output an open command signal 57 after slightly opening the steam control valve.

【００３７】以上の構成で、まず、微開指令信号生成出
力手段４０Ｂでは、ＦＣＢ発生信号４１、あるいは、負
荷遮断発生信号４２のいずれかがＯＮ信号となると、論
理和演算手段４３によって論理和が成立してＯＮ信号が
タイマ４４へ出力され、タイマ４４がタイマスタートす
る。タイマ４４は、微少な所定の時限後にＯＮ信号を論
理積演算手段４６へ出力する。これにより、負荷遮断発
生後の極めて短い時間に発生しやすい誤動作が防止され
る。In the above-described configuration, first, when either the FCB generation signal 41 or the load shedding generation signal 42 becomes an ON signal in the slightly open command signal generation and output means 40B, the logical sum is calculated by the logical sum calculation means 43. When the condition is satisfied, an ON signal is output to the timer 44, and the timer 44 is started. The timer 44 outputs an ON signal to the AND operation means 46 after a minute predetermined time period. This prevents a malfunction that easily occurs in a very short time after the occurrence of load shedding.

【００３８】一方、図８または図９の他の蒸気タービン
通気条件信号３４に相当する他の蒸気加減弁微開許可条
件信号４５が論理積演算手段４６へ出力されており、他
の蒸気加減弁微開許可条件信号４５がＯＮ信号の場合、
論理積演算手段４６によって論理積が成立して蒸気加減
弁微開指令信号４７が出力される。On the other hand, another steam control valve slight opening permission condition signal 45 corresponding to the other steam turbine ventilation condition signal 34 in FIG. 8 or FIG. When the slightly open permission condition signal 45 is an ON signal,
The logical product is formed by the logical product calculating means 46, and the steam control valve slight opening command signal 47 is output.

【００３９】この蒸気加減弁微開指令信号４７は、例え
ば、蒸気加減弁１１の全開信号の１０％以下となる微開
信号で、この蒸気加減弁微開指令信号４７によって排熱
回収ボイラ８から蒸気加減弁１１を介して主蒸気の微少
量の通気が開始される。The steam control valve slight opening command signal 47 is, for example, a small opening signal which is 10% or less of the full opening signal of the steam control valve 11, and is supplied from the exhaust heat recovery boiler 8 by the steam control valve slight opening command signal 47. Via the steam control valve 11, the ventilation of a very small amount of the main steam is started.

【００４０】この場合、蒸気加減弁微開指令信号４７に
よる通気によって蒸気タービン１へ大きな熱応力を加え
ることなく、通気の蓄積に応じて蒸気タービン１への主
蒸気温度の低下が抑制され、主蒸気温度が緩やかに低下
される。一方、蒸気タービン１への通気によって主蒸気
温度より高い蒸気タービンのメタルが冷やされ、通気さ
れる主蒸気温度に近づいてくる。これによって、主蒸気
温度と蒸気タービンメタル温度との温度差の拡大が抑制
される。そして、次第に蒸気タービン温度と蒸気タービ
ンメタル温度との偏差が小さくなる。In this case, a large thermal stress is not applied to the steam turbine 1 by the ventilation by the steam control valve slight opening command signal 47, and a decrease in the main steam temperature to the steam turbine 1 according to the accumulation of the ventilation is suppressed. The steam temperature is slowly reduced. On the other hand, the ventilation of the steam turbine 1 cools the metal of the steam turbine higher than the main steam temperature, and approaches the temperature of the main steam to be ventilated. This suppresses an increase in the temperature difference between the main steam temperature and the steam turbine metal temperature. Then, the deviation between the steam turbine temperature and the steam turbine metal temperature gradually decreases.

【００４１】その後に、微開後開指令信号生成出力手段
５０Ｂによって以下の条件成立の判定がされ、過熱度と
主蒸気圧力等の主蒸気条件が規定範囲内の場合に第１Ｏ
Ｎ信号が第１条件成立判定手段５１から出力される。さ
らに、主蒸気温度が蒸気タービンメタル温度のパラメー
タの規定範囲内の場合に、第２ＯＮ信号が第２条件成立
判定手段５２から出力される。さらに、発電機負荷が初
負荷以上の場合に、第３条件成立判定手段５３によって
第３ＯＮ信号を出力される。Thereafter, the following conditions are determined to be satisfied by the after-opening command signal generation / output means 50B. If the main steam conditions such as the degree of superheat and the main steam pressure are within the specified range, the first O
An N signal is output from the first condition satisfaction determination means 51. Further, when the main steam temperature is within the specified range of the parameter of the steam turbine metal temperature, the second ON signal is output from the second condition satisfaction determination means 52. Further, when the generator load is equal to or more than the initial load, a third ON signal is output by the third condition satisfaction determination means 53.

【００４２】さらに、ガスタービン排ガス温度制御設定
値が蒸気タービンメタル温度のパラメータの規定範囲内
の場合、第４条件成立判定手段５４によって第４ＯＮ信
号が出力される。また、タービンバイパス弁開度が規定
値以上の場合に、第５ＯＮ信号を出力する第５条件成立
判定手段５５によって第５ＯＮ信号が出力される。Further, when the set value of the gas turbine exhaust gas temperature control is within the specified range of the parameter of the steam turbine metal temperature, the fourth condition establishment judging means 54 outputs the fourth ON signal. In addition, when the opening degree of the turbine bypass valve is equal to or greater than the specified value, the fifth ON signal is output by the fifth condition satisfaction determination unit 55 that outputs the fifth ON signal.

【００４３】これら第１ＯＮ信号乃至第５ＯＮ信号の全
信号が論理積演算手段５６へ入力すると、論理積の成立
によって蒸気加減弁微開後開指令信号５７が蒸気加減弁
１１へ出力される。これにより、蒸気加減弁微開指令信
号４７から蒸気加減弁微開後開指令信号５７へ移行さ
れ、全開に近い蒸気加減弁１１の開度とされ通気がされ
る。When all of the first to fifth ON signals are input to the AND operation means 56, the steam control valve 11 is opened to output the steam control valve slight open command signal 57 to the steam control valve 11 when the logical product is established. As a result, the steam control valve slight opening command signal 47 is transferred to the steam control valve slight opening and then open command signal 57, and the steam control valve 11 is almost fully opened and is ventilated.

【００４４】このように本発明の第１実施の形態によれ
ば、ＦＣＢまたは負荷遮断発生後、短時間を経過しない
で直ちに微開操作を行うので、主蒸気温度の低下が少な
く、また、蒸気タービンメタル温度はＦＣＢまたは負荷
遮断発生前とほぼ同じ温度であるため、蒸気タービンの
いわゆるミスマッチが小さく、熱応力を軽減できる。As described above, according to the first embodiment of the present invention, since the fine opening operation is performed immediately after the occurrence of FCB or load shedding without a short time lapse, the decrease in the main steam temperature is small. Since the turbine metal temperature is almost the same as before the occurrence of FCB or load shedding, the so-called mismatch of the steam turbine is small, and the thermal stress can be reduced.

【００４５】また、微開操作を行い蒸気を通気すること
により、蒸気タービンのメタル温度を通気で冷やして、
蒸気タービンのメタル温度を低下させ緩やかに変化する
主蒸気温度と一緒に低下させるため、従来技術でいう通
常の通気条件が成立しやすく、蒸気タービンのミスマッ
チが大きい状態で通気する場合に比べて、蒸気タービン
メタル温度の変化率が小さくなり、熱応力を軽減でき、
しかも、早期に再起動できる。Also, by performing a slight opening operation and venting steam, the metal temperature of the steam turbine is cooled by venting,
In order to lower the metal temperature of the steam turbine together with the slowly changing main steam temperature, the normal ventilation condition referred to in the prior art is easily established, and compared to the case where the steam turbine is ventilated with a large mismatch, The rate of change in steam turbine metal temperature is reduced, reducing thermal stress,
Moreover, it can be restarted early.

【００４６】また、以上により、蒸気タービン負荷をと
るために蒸気加減弁を開操作する時、蒸気タービンのい
わゆるミスマッチがほとんどないため、熱応力を軽減さ
れる。As described above, when the steam control valve is opened to take the steam turbine load, the so-called mismatch of the steam turbine hardly occurs, so that the thermal stress is reduced.

【００４７】なお、第１実施の形態では、第１条件成立
判定手段５１と第２条件成立判定手段５２と第３条件成
立判定手段５３と第４条件成立判定手段５４と第５条件
成立判定手段５５の各判定手段の全てが成立した場合、
蒸気加減弁微開指令信号４７から蒸気加減弁微開後開指
令信号５７へ移行するようにしているが、これに限るも
のでない。まず、第１に少なくとも第２条件成立判定手
段５２がＯＮ信号を出力する場合に蒸気加減弁微開後開
指令信号５７へ移行するようにしてよい。また、第２
に、第２条件成立判定手段５２がＯＮ信号を出力し、か
つ、第４条件成立判定手段５４がＯＮ信号を出力した場
合に蒸気加減弁微開後開指令信号５７へ移行するように
してもよい。In the first embodiment, the first condition satisfaction determination means 51, the second condition satisfaction determination means 52, the third condition satisfaction determination means 53, the fourth condition satisfaction determination means 54, and the fifth condition satisfaction determination means When all of the 55 determination means are established,
The process is shifted from the steam control valve slight opening command signal 47 to the steam control valve slight opening after opening command signal 57, but is not limited thereto. First, when at least the second condition satisfaction determination means 52 outputs an ON signal, the process may shift to the open command signal 57 after the steam control valve is slightly opened. Also, the second
Alternatively, when the second condition satisfaction determination means 52 outputs an ON signal and the fourth condition satisfaction determination means 54 outputs an ON signal, the process may shift to the steam control valve slightly opened and then opened command signal 57. Good.

【００４８】図２は、本発明の第２実施の形態を示すタ
ービン通気制御装置の構成図である。FIG. 2 is a configuration diagram of a turbine ventilation control device according to a second embodiment of the present invention.

【００４９】図２において、タービンの通気制御装置３
０Ｃは、微開指令信号生成出力手段４０Ｃと微開後開指
令信号生成出力手段５０Ｃとから構成されている。In FIG. 2, the turbine ventilation control device 3
0C is composed of a slightly open command signal generation and output means 40C and a slightly open post command signal generation and output means 50C.

【００５０】微開指令信号生成出力手段４０Ｃは、ＦＣ
Ｂ発生信号４１と負荷遮断発生信号４２との論理和を演
算する論理和演算手段４３と、この論理和演算手段４３
の信号と他の蒸気加減弁微開許可条件信号４５とガスタ
ービン回転数整定信号４８の論理積を演算して論理積の
成立によって蒸気加減弁微開指令信号４７を出力する論
理積演算手段４６とを設けている。The slightly open command signal generation / output means 40C
OR operation means 43 for calculating the OR of the B generation signal 41 and the load shedding generation signal 42;
AND operation means 46 which calculates the logical product of the signal of the above and the other steam control valve slight opening permission condition signal 45 and the gas turbine speed setting signal 48 and outputs the steam control valve slight opening command signal 47 when the logical product is established. Are provided.

【００５１】一方、微開後開指令信号生成出力手段５０
Ｃは、第１実施の形態とほぼ同様で、第１条件成立判定
手段５１と第２条件成立判定手段５２と第３条件成立判
定手段５３と第４条件成立判定手段５４と第５条件成立
判定手段５５と論理積演算手段５６とを設けている。第
１条件成立判定手段５１は、過熱度と主蒸気圧力等の主
蒸気条件が規定範囲内の場合に第１ＯＮ信号を出力す
る。第２条件成立判定手段５２は、主蒸気温度が蒸気タ
ービンメタル温度のパラメータの規定範囲内の場合に、
第２ＯＮ信号を出力する。第３条件成立判定手段５３
は、発電機負荷が初負荷以上の場合に、第３ＯＮ信号を
出力する。On the other hand, the open command signal generation and output means 50 after slightly opened
C is substantially the same as that of the first embodiment, and the first condition satisfaction determination means 51, the second condition satisfaction determination means 52, the third condition satisfaction determination means 53, the fourth condition satisfaction determination means 54, and the fifth condition satisfaction determination Means 55 and AND operation means 56 are provided. The first condition satisfaction determination means 51 outputs a first ON signal when main steam conditions such as the degree of superheat and the main steam pressure are within a specified range. The second condition satisfaction determination means 52 determines that the main steam temperature is within a specified range of the parameter of the steam turbine metal temperature.
A second ON signal is output. Third condition satisfaction determination means 53
Outputs a third ON signal when the generator load is equal to or greater than the initial load.

【００５２】第４条件成立判定手段５４は、ガスタービ
ン排ガス温度制御設定値が蒸気タービンメタル温度のパ
ラメータの規定範囲内の場合、第４ＯＮ信号を出力す
る。第５条件成立判定手段５５は、タービンバイパス弁
開度が規定値以上の場合に、第５ＯＮ信号を出力する。
論理積演算手段５６は、これら第１条件成立判定手段５
１と第２条件成立判定手段５２と第３条件成立判定手段
５３と第４条件成立判定手段５４と第５条件成立判定手
段５５からの全信号を入力して論理積の成立によって蒸
気加減弁微開後開指令信号５７を出力する。The fourth condition satisfaction determination means 54 outputs a fourth ON signal when the set value of the gas turbine exhaust gas temperature control is within the specified range of the parameter of the steam turbine metal temperature. The fifth condition satisfaction determination means 55 outputs a fifth ON signal when the opening degree of the turbine bypass valve is equal to or greater than a specified value.
The AND operation means 56 is provided with the first condition satisfaction determination means 5.
All the signals from the first, second condition satisfaction determination means 52, third condition satisfaction determination means 53, fourth condition satisfaction determination means 54, and fifth condition satisfaction determination means 55 are input, and the logical product is established to determine whether the steam control valve is fine. An open command signal 57 is output after opening.

【００５３】以上の構成で、まず、微開指令信号生成出
力手段４０ＣへＦＣＢ発生信号４１、あるいは、負荷遮
断発生信号４２のいずれかがＯＮ信号となると、論理和
演算手段４３によって論理和が成立して論理積演算手段
４６へＯＮ信号が出力される。With the above configuration, first, when either the FCB generation signal 41 or the load shedding generation signal 42 is turned ON to the slightly open command signal generation / output means 40C, the logical sum is established by the logical sum operation means 43. Then, an ON signal is output to the AND operation means 46.

【００５４】一方、ガスタービン回転数整定信号４８と
他の蒸気加減弁微開許可条件信号４５が論理積演算手段
４６へ出力されており、ガスタービン回転数整定信号４
８と他の蒸気加減弁微開許可条件信号４５がＯＮ信号の
場合、論理積演算手段４６によって論理積が成立して蒸
気加減弁微開指令信号４７が出力される。On the other hand, a gas turbine speed setting signal 48 and another steam control valve slight opening permission condition signal 45 are output to the logical product calculating means 46, and the gas turbine speed setting signal 4
When 8 and the other steam control valve slight opening permission condition signal 45 are ON signals, the logical product is established by the logical product calculating means 46 and the steam control valve slight opening command signal 47 is output.

【００５５】この蒸気加減弁微開指令信号４７は、例え
ば、蒸気加減弁１１の全開の１０％以下となる微開信号
で、この蒸気加減弁微開指令信号４７によって排熱回収
ボイラ８から蒸気加減弁１１を介して主蒸気の通気がさ
れる。The steam control valve slight opening command signal 47 is, for example, a slightly opening signal that is 10% or less of the full opening of the steam control valve 11, and the steam control valve slight opening command signal 47 causes the steam from the exhaust heat recovery boiler 8 to emit steam. The main steam is vented through the control valve 11.

【００５６】この場合、蒸気加減弁微開指令信号４７に
よる通気によって蒸気タービン１への主蒸気温度の低下
が抑制され、主蒸気温度が緩やかに低下される。これに
よって、主蒸気温度と蒸気タービンメタル温度との温度
差の拡大が抑制される。そして、次第に蒸気タービン温
度と蒸気タービンメタル温度との偏差が小さくなる。In this case, the decrease in the main steam temperature to the steam turbine 1 is suppressed by the ventilation by the steam control valve slight opening command signal 47, and the main steam temperature is gradually lowered. This suppresses an increase in the temperature difference between the main steam temperature and the steam turbine metal temperature. Then, the deviation between the steam turbine temperature and the steam turbine metal temperature gradually decreases.

【００５７】その後に、微開後開指令信号生成出力手段
５０Ｃによって過熱度と主蒸気圧力等の主蒸気条件が規
定範囲内の場合に第１ＯＮ信号が第１条件成立判定手段
５１から出力される。さらに、主蒸気温度が蒸気タービ
ンメタル温度のパラメータの規定範囲内の場合に、第２
ＯＮ信号が第２条件成立判定手段５２から出力される。
さらに、発電機負荷が初負荷以上の場合に、第３条件成
立判定手段５３によって第３ＯＮ信号が出力される。Thereafter, if the main steam conditions such as the degree of superheat and the main steam pressure are within a specified range, the first ON signal is output from the first condition satisfaction judging means 51 by the slightly open post-opening command signal generating and outputting means 50C. . Further, when the main steam temperature is within the specified range of the parameter of the steam turbine metal temperature, the second
An ON signal is output from the second condition satisfaction determination unit 52.
Further, when the generator load is equal to or more than the initial load, a third ON signal is output by the third condition satisfaction determination means 53.

【００５８】さらに、ガスタービン排ガス温度制御設定
が蒸気タービンメタル温度のパラメータの規定範囲内の
場合、第４条件成立判定手段５４によって第４ＯＮ信号
が出力される。さらに、タービンバイパス弁開度が規定
値以上の場合に、第５ＯＮ信号を出力する第５条件成立
判定手段５５によって第５ＯＮ信号が出力される。Further, when the gas turbine exhaust gas temperature control setting is within the specified range of the parameter of the steam turbine metal temperature, the fourth ON signal is output by the fourth condition satisfaction determination means 54. Furthermore, when the opening degree of the turbine bypass valve is equal to or larger than the specified value, the fifth ON signal is output by the fifth condition satisfaction determination unit 55 that outputs the fifth ON signal.

【００５９】これら第１ＯＮ信号乃至第５ＯＮ信号の全
信号が論理積演算手段５６へ入力すると、論理積の成立
によって蒸気加減弁微開後開指令信号５７が蒸気加減弁
１１へ出力される。これにより、蒸気加減弁微開指令信
号４７から蒸気加減弁微開後開指令信号５７へ移行さ
れ、全開に近い蒸気加減弁１１の開度とされ通気がされ
る。When all of the first to fifth ON signals are input to the AND operation means 56, the steam control valve 11 is slightly opened and the open control signal 57 is output to the steam control valve 11 when the logical product is established. As a result, the steam control valve slight opening command signal 47 is transferred to the steam control valve slight opening and then open command signal 57, and the steam control valve 11 is almost fully opened and is ventilated.

【００６０】このように本発明の第２実施の形態によれ
ば、ＦＣＢまたは負荷遮断発生後、直ちにガスタービン
回転数整定後に微開操作を行うので、主蒸気温度の低下
が少なく、また、蒸気タービンメタル温度はＦＣＢまた
は負荷遮断発生前とほぼ同じ温度であるため、蒸気ター
ビンのミスマッチが小さく、熱応力を軽減できる。As described above, according to the second embodiment of the present invention, the slight opening operation is performed immediately after the occurrence of FCB or load shedding and after the gas turbine speed is settled, so that the main steam temperature is less reduced, and Since the turbine metal temperature is almost the same as before the occurrence of FCB or load shedding, the mismatch of the steam turbine is small and the thermal stress can be reduced.

【００６１】また、微開操作を行い蒸気を通気すること
により、蒸気タービンのメタル温度は、緩やかに変化す
る主蒸気温度と一緒に低下するため、従来技術の通常の
通気条件が成立しやすく、蒸気タービンのミスマッチが
大きい状態で通気する場合に比べて、蒸気タービンメタ
ル温度の変化率が小さくなり、再起動を早期にでき、し
かも熱応力を軽減できる。Further, by performing a slight opening operation and aerating the steam, the metal temperature of the steam turbine decreases together with the main steam temperature which changes gradually, so that the ordinary aeration condition of the prior art is easily satisfied. The rate of change of the steam turbine metal temperature is smaller than when steam is ventilated in a state where the mismatch of the steam turbine is large, so that the restart can be made earlier and the thermal stress can be reduced.

【００６２】また、以上により、蒸気タービン負荷をと
るために蒸気加減弁を開操作する時、蒸気タービンのミ
スマッチがほとんどないため、熱応力を軽減される。As described above, when the steam control valve is opened to take the steam turbine load, the thermal stress is reduced because there is almost no mismatch of the steam turbine.

【００６３】図３は、本発明の第３実施の形態を示すタ
ービン通気制御装置の部分構成図である。FIG. 3 is a partial configuration diagram of a turbine ventilation control device showing a third embodiment of the present invention.

【００６４】図において、微開指令信号生成出力手段４
０Ｄは、第１実施の形態または第２実施の形態によって
得られた蒸気加減弁微開指令信号４７の上限に対して所
定の設定変化率で制限して蒸気加減弁開度信号６３とし
て出力する微開レートリミット手段６０を設ける一方、
微開後開指令信号生成出力手段５０Ｄは、第１実施の形
態または第２実施の形態によって得られた蒸気加減弁微
開後開指令信号５７の上限に対して所定の設定変化率で
制限して蒸気加減弁開度信号６３として出力する微開後
レートリミット手段６１を設けるものである。In the figure, the slightly open command signal generation and output means 4
0D is output as a steam control valve opening degree signal 63 by limiting the upper limit of the steam control valve slight opening command signal 47 obtained by the first or second embodiment at a predetermined set change rate. While providing the slightly opening rate limit means 60,
The slightly open post-opening command signal generation and output means 50D limits the upper limit of the steam control valve after slightly opening open command signal 57 obtained by the first or second embodiment at a predetermined set change rate. And a rate limiting means 61 after slight opening which is output as a steam control valve opening signal 63.

【００６５】以上の構成で、第１実施の形態により得ら
れた蒸気加減弁微開指令信号４７の上限が微開レートリ
ミット手段６０によって制限され、所定のレートによっ
て徐々に上昇するように蒸気加減弁開度信号６３が出力
される。この結果、蒸気加減弁開度信号６３が急激に上
昇することが抑制され、蒸気タービンメタル温度の急激
な温度上昇が回避される。これにより、第１実施の形
態、あるいは、第２実施の形態において、蒸気加減弁微
開指令信号４７から蒸気加減弁微開後開指令信号５７へ
移行が円滑に早期にできる。With the above configuration, the upper limit of the steam control valve slight opening command signal 47 obtained by the first embodiment is limited by the slightly opening rate limiting means 60, and the steam control is performed so as to gradually increase at a predetermined rate. A valve opening signal 63 is output. As a result, a sudden increase in the steam control valve opening signal 63 is suppressed, and a rapid increase in the steam turbine metal temperature is avoided. Thereby, in the first embodiment or the second embodiment, the transition from the steam control valve slight opening command signal 47 to the steam control valve slight opening after opening command signal 57 can be performed smoothly and early.

【００６６】また、第１実施の形態により得られた蒸気
加減弁微開後開指令信号５７の上限が微開後レートリミ
ット手段６１によって制限され、所定のレートによって
徐々に上昇するように蒸気加減弁開度信号６３が出力さ
れる。この結果、蒸気加減弁微開指令信号４７から蒸気
加減弁微開後開指令信号５７へ移行後、蒸気加減弁開度
信号６３が急激に上昇することが抑制され、蒸気タービ
ンメタル温度の急激な温度上昇が回避される。これによ
り、蒸気加減弁微開後開指令信号５７が蒸気タービンメ
タルへ大きな熱応力を与えることなく最短で、全開とす
ることができる。Further, the upper limit of the slightly open steam control valve command signal 57 obtained by the first embodiment is limited by the after-open rate limit means 61, and the steam is controlled so as to gradually increase at a predetermined rate. A valve opening signal 63 is output. As a result, after shifting from the steam control valve slight opening command signal 47 to the steam control valve slight opening post-open command signal 57, the steam control valve opening signal 63 is prevented from sharply increasing, and the steam turbine metal temperature sharply increases. Temperature rise is avoided. Accordingly, the steam control valve slightly opened and then the open command signal 57 can be fully opened in the shortest time without giving a large thermal stress to the steam turbine metal.

【００６７】このように第３実施の形態によれば、蒸気
タービンに流入する蒸気の増加量の上限が制限されるた
め、蒸気タービンメタル温度の変化率も小さくなり、第
１実施の形態、あるいは、第２実施の形態により軽減さ
れた蒸気タービンの熱応力をさらに軽減できる。As described above, according to the third embodiment, since the upper limit of the amount of increase in the steam flowing into the steam turbine is limited, the rate of change of the steam turbine metal temperature is reduced, and the first embodiment or The thermal stress of the steam turbine reduced by the second embodiment can be further reduced.

【００６８】図４は、本発明の第４実施の形態を示すタ
ービン通気制御装置の部分構成図である。FIG. 4 is a partial configuration diagram of a turbine ventilation control device according to a fourth embodiment of the present invention.

【００６９】図において、微開指令信号生成出力手段４
０Ｅは、第１実施の形態または第２実施の形態によって
得られた蒸気加減弁微開指令信号４７の上限に対して所
定の設定変化率で制限して蒸気加減弁開度信号６３とし
て出力する微開レートリミット手段６０Ｅと蒸気タービ
ンメタル温度信号６４に応じて所定の関数演算を行い、
得られた設定変化率を微開レートリミット手段６０Ｅへ
設定する関数演算手段６５とを設けている。In the figure, the slightly open command signal generation and output means 4
0E is output as a steam control valve opening degree signal 63 by limiting the upper limit of the steam control valve slight opening command signal 47 obtained by the first embodiment or the second embodiment at a predetermined set change rate. A predetermined function calculation is performed according to the slightly opening rate limit means 60E and the steam turbine metal temperature signal 64,
And a function calculating means 65 for setting the obtained set change rate to the slightly opening rate limiting means 60E.

【００７０】また、微開後開指令信号生成出力手段５０
Ｅは、第１実施の形態または第２実施の形態によって得
られた蒸気加減弁微開後開指令信号５７の上限に対して
所定の設定変化率で制限して蒸気加減弁開度信号６３と
して出力する微開後レートリミット手段６１Ｅと蒸気タ
ービンメタル温度信号６４に応じて所定の関数演算を行
い、得られた設定変化率を微開後レートリミット手段６
１Ｅへ設定する関数演算手段６６とを設けている。Further, an open command signal generating / outputting means 50 after a slight opening is provided.
E is a steam control valve opening degree signal 63 obtained by restricting the upper limit of the steam control valve slightly opened after opening command signal 57 obtained by the first or second embodiment at a predetermined set change rate. A predetermined function operation is performed in accordance with the post-fine-open rate limit means 61E and the steam turbine metal temperature signal 64, and the obtained set change rate is used as the post-fine-open rate limit means 6.
And a function calculating means 66 for setting the value to 1E.

【００７１】以上の構成で、第１実施の形態または第２
実施の形態により得られた蒸気加減弁微開指令信号４７
の上限が微開レートリミット手段６０Ｅによって制限さ
れ、所定のレートによって徐々に上昇するように蒸気加
減弁開度信号６３が出力される。この場合に、関数演算
手段６５によって蒸気タービンメタル温度信号６４に応
じて予め設定された関数に従って演算され、得られた設
定変化率が微開レートリミット手段６０Ｅに設定され
る。この結果、蒸気加減弁開度信号６３が急激に上昇す
ることが抑制され、蒸気タービンメタル温度の急激な温
度上昇が回避される。With the above configuration, the first embodiment or the second embodiment
Steam control valve slight opening command signal 47 obtained by the embodiment
Is limited by the slightly opening rate limiting means 60E, and the steam control valve opening degree signal 63 is output so as to gradually increase at a predetermined rate. In this case, the function calculating means 65 calculates according to the function set in advance in accordance with the steam turbine metal temperature signal 64, and the obtained set change rate is set in the fine opening rate limiting means 60E. As a result, a sudden increase in the steam control valve opening signal 63 is suppressed, and a rapid increase in the steam turbine metal temperature is avoided.

【００７２】一方、第１実施の形態または第２実施の形
態により得られた蒸気加減弁微開後開指令信号５７の上
限が微開後レートリミット手段６１Ｅによって制限さ
れ、所定のレートによって徐々に上昇するように蒸気加
減弁開度信号６３が出力される。この場合に、関数演算
手段６６によって蒸気タービンメタル温度信号６４に応
じて予め設定された関数に従って演算され、得られた設
定変化率が微開後レートリミット手段６１Ｅへ設定され
る。On the other hand, the upper limit of the steam control valve slightly opened after opening command signal 57 obtained in the first embodiment or the second embodiment is limited by the after slightly opening rate limiting means 61E, and is gradually increased at a predetermined rate. The steam control valve opening signal 63 is output so as to rise. In this case, the function calculating means 66 calculates according to the function set in advance in accordance with the steam turbine metal temperature signal 64, and the obtained set change rate is set to the rate limit means 61E after slight opening.

【００７３】このように第４実施の形態によれば、第３
実施の形態による効果に加えて蒸気タービンメタル温度
に応じて制限する変化率を増減することができるので、
熱応力を小さく維持できる状態の場合に変化率の制限を
小さくして早期に負荷を得ることができ、実情に即した
再起動ができる。As described above, according to the fourth embodiment, the third
In addition to the effects of the embodiment, the rate of change limited according to the steam turbine metal temperature can be increased or decreased.
In a state where the thermal stress can be kept small, the load can be obtained at an early stage by reducing the limit of the rate of change, and the restart can be performed according to the actual situation.

【００７４】図５は、本発明の第５実施の形態を示すタ
ービン通気制御装置の部分構成図である。FIG. 5 is a partial configuration diagram of a turbine ventilation control device according to a fifth embodiment of the present invention.

【００７５】図において、微開指令信号生成出力手段４
０Ｆは、第１実施の形態または第２実施の形態によって
得られた蒸気加減弁微開指令信号４７の上限に対して所
定の設定変化率で制限して蒸気加減弁開度信号６３とし
て出力する微開レートリミット手段６０Ｆと蒸気タービ
ンメタル温度と蒸気タービン蒸気温度信号との差信号６
７に応じて所定の関数演算を行い、得られた設定変化率
を微開レートリミット手段６０Ｆへ設定する関数演算手
段６５Ｆとを設けている。In the figure, the slightly open command signal generation and output means 4
OF is limited at a predetermined set change rate with respect to the upper limit of the steam control valve slight opening command signal 47 obtained by the first embodiment or the second embodiment, and is output as the steam control valve opening degree signal 63. Slight opening rate limit means 60F, difference signal 6 between steam turbine metal temperature and steam turbine steam temperature signal
And a function calculation means 65F for performing a predetermined function calculation according to 7 and setting the obtained set change rate to the fine opening rate limit means 60F.

【００７６】また、微開後開指令信号生成出力手段５０
Ｆは、第１実施の形態または第２実施の形態によって得
られた蒸気加減弁微開後開指令信号５７の上限に対して
所定の設定変化率で制限して蒸気加減弁開度信号６３と
して出力する微開後レートリミット手段６１Ｆと蒸気タ
ービンメタル温度と蒸気タービン蒸気温度信号との差信
号６７に応じて所定の関数演算を行い、得られた設定変
化率を微開後レートリミット手段６１Ｆへ設定する関数
演算手段６６Ｆとを設けている。Further, an open command signal generating / outputting means 50 after a slight opening is provided.
F is a steam control valve opening degree signal 63 obtained by restricting the upper limit of the steam control valve slightly opened after opening command signal 57 obtained by the first embodiment or the second embodiment at a predetermined set change rate. A predetermined function calculation is performed in accordance with the output rate limiting means 61F to be output and the difference signal 67 between the steam turbine metal temperature and the steam turbine steam temperature signal, and the obtained set change rate is sent to the rate limiting means 61F after fine opening. A function calculation means 66F for setting is provided.

【００７７】以上の構成で、第１実施の形態または第２
実施の形態により得られた蒸気加減弁微開指令信号４７
の上限が微開レートリミット手段６０Ｆによって制限さ
れ、所定のレートによって徐々に上昇するように蒸気加
減弁開度信号６３が出力される。この場合に、関数演算
手段６５Ｆによって蒸気タービンメタル温度と蒸気ター
ビン蒸気温度信号との差信号６７に応じて予め設定され
た関数に従って演算され、得られた設定変化率が微開後
レートリミット手段６１Ｆに設定される。この結果、蒸
気加減弁開度信号６３が急激に上昇することが抑制さ
れ、蒸気タービンメタル温度の急激な温度上昇が回避さ
れる。With the above configuration, the first embodiment or the second embodiment
Steam control valve slight opening command signal 47 obtained by the embodiment
Is limited by the slightly opening rate limiting means 60F, and the steam control valve opening signal 63 is output so as to gradually increase at a predetermined rate. In this case, the function calculating means 65F calculates according to a function set in advance in accordance with the difference signal 67 between the steam turbine metal temperature and the steam turbine steam temperature signal, and the obtained set change rate is used as the post-fine opening rate limiting means 61F. Is set to As a result, a sudden increase in the steam control valve opening signal 63 is suppressed, and a rapid increase in the steam turbine metal temperature is avoided.

【００７８】一方、第１実施の形態または第２実施の形
態により得られた蒸気加減弁微開後開指令信号５７の上
限が微開後レートリミット手段６１Ｆによって制限さ
れ、所定のレートによって徐々に上昇するように蒸気加
減弁開度信号６３が出力される。この場合に、関数演算
手段６６Ｆによって蒸気タービンメタル温度と蒸気ター
ビン蒸気温度信号との差信号６７に応じて予め設定され
た関数に従って演算され、得られた設定変化率が微開後
レートリミット手段６１Ｆへ設定される。この結果、蒸
気加減弁微開指令信号４７から蒸気加減弁微開後開指令
信号５７へ移行後、蒸気加減弁開度信号６３が急激に上
昇することが抑制され、蒸気タービンメタル温度の急激
な温度上昇が回避される。On the other hand, the upper limit of the steam control valve slightly opened after opening command signal 57 obtained by the first embodiment or the second embodiment is limited by the after slightly opening rate limiting means 61F, and is gradually increased at a predetermined rate. The steam control valve opening signal 63 is output so as to rise. In this case, the function calculating means 66F calculates according to a function set in advance in accordance with the difference signal 67 between the steam turbine metal temperature and the steam turbine steam temperature signal, and the obtained set change rate is used as the post-slightly opening rate limiting means 61F. Is set to As a result, after shifting from the steam control valve slight opening command signal 47 to the steam control valve slight opening post-open command signal 57, the steam control valve opening signal 63 is prevented from sharply increasing, and the steam turbine metal temperature sharply increases. Temperature rise is avoided.

【００７９】このように第５実施の形態によれば、第３
実施の形態の効果に加えて蒸気タービンメタル温度と蒸
気タービン蒸気温度との偏差とに応じて制限する変化率
が増減することができるので、熱応力を小さく維持でき
る状態の場合に変化率の制限を小さくして早期に負荷を
得ることができ、一律に変化率を制限するのに比べて実
情に即した早期の再起動ができる。As described above, according to the fifth embodiment, the third
In addition to the effects of the embodiment, the rate of change limited according to the deviation between the steam turbine metal temperature and the steam turbine steam temperature can be increased or decreased, so that when the thermal stress can be kept small, the rate of change is limited. , The load can be obtained at an early stage, and an earlier restart can be performed according to the actual situation as compared with the case where the rate of change is uniformly limited.

【００８０】図６は、本発明の第６実施の形態を示すタ
ービン通気制御装置の部分構成図である。FIG. 6 is a partial configuration diagram of a turbine ventilation control device according to a sixth embodiment of the present invention.

【００８１】図において、微開指令信号生成出力手段４
０Ｇは、第１実施の形態または第２実施の形態によって
得られた蒸気加減弁微開指令信号４７の上限に対して所
定の設定変化率で制限して蒸気加減弁開度信号６３とし
て微開レートリミット手段６０Ｇと蒸気タービンメタル
温度信号６４と蒸気タービンメタル温度と蒸気タービン
蒸気温度信号との差信号６７に応じて所定の関数演算を
行い、得られた設定変化率を微開レートリミット手段６
０Ｇへ設定する関数演算手段６５Ｇとを設けるものであ
る。In the figure, the slightly open command signal generating and outputting means 4
0G is a small opening as the steam control valve opening degree signal 63 by limiting the upper limit of the steam control valve slight opening command signal 47 obtained by the first embodiment or the second embodiment at a predetermined set change rate. A predetermined function operation is performed in accordance with the rate limiting means 60G, the steam turbine metal temperature signal 64, and the difference signal 67 between the steam turbine metal temperature and the steam turbine steam temperature signal, and the obtained set change rate is slightly opened rate limiting means 6
And a function calculating means 65G for setting the value to 0G.

【００８２】また、微開後開指令信号生成出力手段５０
Ｇは、第１実施の形態または第２実施の形態によって得
られた蒸気加減弁微開後開指令信号５７の上限に対して
所定の設定変化率で制限して蒸気加減弁開度信号６３と
して出力する微開後レートリミット手段６１Ｇと蒸気タ
ービンメタル温度信号６４と蒸気タービンメタル温度と
蒸気タービン蒸気温度信号との差信号６７に応じて所定
の関数演算を行い、得られた設定変化率を微開後レート
リミット手段６１Ｇへ設定する関数演算手段６６Ｇとを
設けるものである。Further, an open command signal generating / outputting means 50 after a slight opening is provided.
G is a steam control valve opening degree signal 63 obtained by restricting the upper limit of the steam control valve slight opening post-opening command signal 57 obtained by the first embodiment or the second embodiment at a predetermined set change rate. A predetermined function operation is performed according to the output rate limiting means 61G, the steam turbine metal temperature signal 64, and the difference signal 67 between the steam turbine metal temperature and the steam turbine steam temperature signal to output, and the obtained set change rate is slightly reduced. And a function calculating means 66G for setting the rate limiting means 61G after opening.

【００８３】以上の構成で、第１実施の形態または第２
実施の形態により得られた蒸気加減弁微開指令信号４７
の上限が微開レートリミット手段６０Ｇによって制限さ
れ、所定のレートによって徐々に上昇するように蒸気加
減弁開度信号６３が出力される。この場合に、関数演算
手段６５Ｇによって蒸気タービンメタル温度信号６４と
蒸気タービンメタル温度と蒸気タービン蒸気温度信号と
の差信号６７に応じて予め設定された関数に従って演算
され、得られた設定変化率が微開レートリミット手段６
０Ｇに設定される。この結果、蒸気加減弁開度信号６３
が急激に上昇することが抑制され、蒸気タービンメタル
温度の急激な温度上昇が回避される。With the above configuration, the first embodiment or the second embodiment
Steam control valve slight opening command signal 47 obtained by the embodiment
Is limited by the slightly opening rate limiting means 60G, and the steam control valve opening signal 63 is output so as to gradually increase at a predetermined rate. In this case, the function change means 65G calculates according to a function set in advance in accordance with the steam turbine metal temperature signal 64 and the difference signal 67 between the steam turbine metal temperature and the steam turbine steam temperature signal, and the obtained set change rate is obtained. Slight opening rate limit means 6
It is set to 0G. As a result, the steam control valve opening signal 63
Of the steam turbine metal is prevented from rising rapidly.

【００８４】一方、第１実施の形態または第２実施の形
態により得られた蒸気加減弁微開後開指令信号５７の上
限が微開後レートリミット手段６１Ｇによって制限さ
れ、所定のレートによって徐々に上昇するように蒸気加
減弁開度信号６３が出力される。この場合に、関数演算
手段６６Ｇによって蒸気タービンメタル温度信号６４と
蒸気タービンメタル温度と蒸気タービン蒸気温度信号と
の差信号６７とに応じて予め設定された関数に従って演
算され、得られた設定変化率が微開後レートリミット手
段６１Ｇへ設定される。On the other hand, the upper limit of the steam control valve slightly opened after opening command signal 57 obtained by the first embodiment or the second embodiment is limited by the after slightly opening rate limiting means 61G, and gradually increased at a predetermined rate. The steam control valve opening signal 63 is output so as to rise. In this case, the function change means 66G is operated according to a function set in advance according to the steam turbine metal temperature signal 64 and the difference signal 67 between the steam turbine metal temperature and the steam turbine steam temperature signal, and the obtained set change rate is obtained. Is set to the rate limit means 61G after the slight opening.

【００８５】このように第６実施の形態によれば、第３
実施の形態の効果に加えて蒸気タービンメタル温度とこ
の蒸気タービンメタル温度と蒸気タービン蒸気温度との
偏差とに応じて制限する変化率が増減することができる
ので、熱応力を小さく維持できる状態の場合に変化率の
制限を小さくして早期に負荷を得ることができ、一律に
変化率を制限するのに比べて実情に即した早期の再起動
ができる。As described above, according to the sixth embodiment, the third
In addition to the effects of the embodiment, the rate of change limited according to the steam turbine metal temperature and the deviation between the steam turbine metal temperature and the steam turbine steam temperature can be increased or decreased. In this case, it is possible to obtain a load early by reducing the limitation on the rate of change, and it is possible to restart the machine early according to the actual situation as compared with uniformly limiting the rate of change.

【００８６】[0086]

【発明の効果】以上説明したように請求項１の発明によ
れば、系統負荷遮断等の後に直ちに微量の通気をするの
で、蒸気タービンの蒸気温度の急激な低下が抑制でき、
負荷遮断後に蒸気タービン蒸気温度と蒸気タービンメタ
ル温度との差が小さな状態で通気することができ、蒸気
タービンへ与える熱応力を最小とすることができ、寿命
消費の少ない早期の再起動ができる。As described above, according to the first aspect of the present invention, a small amount of air is vented immediately after the system load is cut off, so that a rapid decrease in the steam temperature of the steam turbine can be suppressed.
After the load is cut off, air can be vented in a state where the difference between the steam turbine steam temperature and the steam turbine metal temperature is small, the thermal stress applied to the steam turbine can be minimized, and an early restart with little life consumption can be performed.

【００８７】また、請求項２の発明によれば、請求項１
の発明の効果に加え、負荷遮断後の所定の微少な時限後
で、かつ、蒸気加減弁微開許可条件の充足の場合、ある
いは、ガスタービン回転数整定した場合にのみ蒸気加減
弁微開指令信号が生成出力されるので、誤って蒸気加減
弁微開指令信号が出力され、蒸気タービンへ大きな熱応
力を与えるおそれを防止することができる。According to the invention of claim 2, according to claim 1,
In addition to the effect of the invention, the steam control valve slight opening command is issued only after a predetermined minute time limit after the load is cut off and when the conditions for permitting the steam control valve slight opening are satisfied or when the gas turbine rotation speed is settled. Since the signal is generated and output, it is possible to prevent a possibility that a steam control valve slight opening command signal is output by mistake and a large thermal stress is applied to the steam turbine.

【００８８】また、請求項３の発明によれば、系統負荷
遮断等の後に直ちに微量の通気条件が成立すると、微少
量の通気をするための蒸気加減弁微開指令信号を生成出
力するので、蒸気タービンの蒸気温度の急激な低下が微
少な通気によって抑制でき、蒸気タービン蒸気温度と蒸
気タービンメタル温度との差が小さな状態で通気するこ
とができ、蒸気タービンへ与える熱応力を最小とするこ
とができ、寿命消費の少ない早期の再起動ができる。According to the third aspect of the present invention, when a small amount of ventilation is established immediately after system load interruption or the like, a steam control valve slight opening command signal for providing a small amount of ventilation is generated and output. The rapid decrease in steam temperature of the steam turbine can be suppressed by minute ventilation, and the difference between the steam turbine steam temperature and the steam turbine metal temperature can be ventilated in a small state, minimizing the thermal stress applied to the steam turbine. And restarting early with little life consumption.

【００８９】また、請求項４の発明によれば、蒸気加減
弁微開指令信号及び微開後の蒸気加減弁開指令信号の上
限側が所定の変化率で制限されて出力されるので、蒸気
タービンへの通気量が急激に増加することがなく、蒸気
タービンメタル温度の変化率も小さくでき、蒸気タービ
ンへ与える熱応力を軽減することができる。According to the fourth aspect of the invention, the upper limit of the steam control valve slight opening command signal and the steam control valve opening command signal after the slight opening are output at a limited rate of change, so that the steam turbine Thus, the rate of change in the temperature of the steam turbine metal can be reduced, and the thermal stress applied to the steam turbine can be reduced.

【００９０】また、請求項５の発明によれば、請求項４
の発明の効果に加えて蒸気タービンメタル温度に応じて
制限する変化率を増減することができるので、熱応力を
小さく維持できる状態の場合に変化率の制限を小さくし
て早期に負荷を得ることができ、実情に即した再起動が
できる。Further, according to the invention of claim 5, according to claim 4,
In addition to the effect of the invention of the invention, the rate of change limited according to the steam turbine metal temperature can be increased or decreased, so that when the thermal stress can be kept small, the limit of the rate of change is reduced and the load is obtained early. Can be restarted according to the actual situation.

【００９１】また、請求項６の発明によれば、請求項４
の発明の効果に加えて蒸気タービンメタル温度と蒸気タ
ービン蒸気温度との偏差に応じて制限する変化率が増減
することができるので、熱応力を小さく維持できる状態
の場合に変化率の制限を小さくして早期に負荷を得るこ
とができ、一律に変化率を制限するのに比べて実情に即
した早期の再起動ができる。According to the invention of claim 6, according to claim 4,
In addition to the effects of the invention, the rate of change to be limited can be increased or decreased according to the deviation between the steam turbine metal temperature and the steam turbine steam temperature. As a result, the load can be obtained early, and the restart can be performed early according to the actual situation as compared with the case where the rate of change is uniformly limited.

【００９２】また、請求項７の発明によれば、請求項４
の発明の効果に加えて蒸気タービンメタル温度とこの蒸
気タービンメタル温度と蒸気タービン蒸気温度との偏差
に応じて制限する変化率が増減することができるので、
熱応力を小さく維持できる状態の場合に変化率の制限を
小さくして早期に負荷を得ることができ、一律に変化率
を制限するのに比べて実情に即した早期の再起動ができ
る。According to the seventh aspect of the present invention, there is provided a fourth aspect.
In addition to the effects of the invention, the rate of change limited according to the steam turbine metal temperature and the deviation between the steam turbine metal temperature and the steam turbine steam temperature can be increased or decreased.
In a state where the thermal stress can be kept small, the load can be obtained early by reducing the limit of the rate of change, so that the restart can be performed earlier according to the actual situation as compared with uniformly limiting the rate of change.

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明の第１実施の形態を示すタービン通気制
御装置の構成図である。FIG. 1 is a configuration diagram of a turbine ventilation control device according to a first embodiment of the present invention.

【図２】本発明の第２実施の形態を示すタービン通気制
御装置の構成図である。FIG. 2 is a configuration diagram of a turbine ventilation control device according to a second embodiment of the present invention.

【図３】本発明の第３実施の形態を示すタービン通気制
御装置の部分構成図である。FIG. 3 is a partial configuration diagram of a turbine ventilation control device according to a third embodiment of the present invention.

【図４】本発明の第４実施の形態を示すタービン通気制
御装置の部分構成図である。FIG. 4 is a partial configuration diagram of a turbine ventilation control device according to a fourth embodiment of the present invention.

【図５】本発明の第５実施の形態を示すタービン通気制
御装置の部分構成図である。FIG. 5 is a partial configuration diagram of a turbine ventilation control device showing a fifth embodiment of the present invention.

【図６】本発明の第６実施の形態を示すタービン通気制
御装置の部分構成図である。FIG. 6 is a partial configuration diagram of a turbine ventilation control device according to a sixth embodiment of the present invention.

【図７】コンバインドサイクル発電設備の系統図であ
る。FIG. 7 is a system diagram of a combined cycle power generation facility.

【図８】従来のタービン通気制御装置の構成図である。FIG. 8 is a configuration diagram of a conventional turbine ventilation control device.

【図９】従来の他のタービン通気制御装置の構成図であ
る。FIG. 9 is a configuration diagram of another conventional turbine ventilation control device.

【符号の説明】[Explanation of symbols]

１ 蒸気タービン ２ 発電機 ３ ガスタービン ４ 空気圧縮機 ５ 単軸 ６，３０ 通気制御装置 ７ 燃焼器 ８ 排熱回収ボイラ ９ 排ガス配管 １０ 蒸気配管 １１ 蒸気加減弁 １２ 復水器 １３ タービンバイパス配管 １４ タービンバイパス弁 １６ ＳＴ第１段メタル温度検出器 １６ａ ＳＴ第１段メタル温度検出信号 １８ ガスタービン排ガス温度検出器 １８ａ ガスタービン排ガス温度検出信号 １９ 主蒸気温度検出器 １９ａ 主蒸気温度検出信号 ２０ 主蒸気圧力検出器 ２０ａ 主蒸気圧力検出信号 ３１，６５，６６ 関数演算手段 ３２ ＳＴ第１段蒸気温度信号 ３３ ミスマッチ判定手段 ３４ 他の蒸気タービン通気条件信号 ３５ 温度マッチング制御完了信号 ３６，４６，５６ 論理積演算手段 ４０ 微開指令信号生成出力手段 ４１ ＦＣＢ発生信号 ４２ 負荷遮断発生信号 ４３ 論理和演算手段 ４４ タイマ ４５ 他の蒸気加減弁微開許可条件信号 ４７ 蒸気加減弁微開指令信号 ４８ ガスタービン回転数整定信号 ５０ 微開後開指令信号生成出力手段 ５１ 第１条件成立判定手段 ５２ 第２条件成立判定手段 ５３ 第３条件成立判定手段 ５４ 第４条件成立判定手段 ５５ 第５条件成立判定手段 ５７ 蒸気加減弁微開後開指令信号 ６０ 微開レートリミット手段 ６１ 微開後レートリミット手段 ６３ 蒸気加減弁開度信号 ６４ 蒸気タービンメタル温度信号 ６７ 蒸気タービンメタル温度と蒸気タービン蒸気温度
信号との差信号DESCRIPTION OF SYMBOLS 1 Steam turbine 2 Generator 3 Gas turbine 4 Air compressor 5 Single shaft 6,30 Ventilation control device 7 Combustor 8 Exhaust heat recovery boiler 9 Exhaust gas piping 10 Steam piping 11 Steam control valve 12 Condenser 13 Turbine bypass piping 14 Turbine Bypass valve 16 ST 1st stage metal temperature detector 16a ST 1st stage metal temperature detection signal 18 Gas turbine exhaust gas temperature detector 18a Gas turbine exhaust gas temperature detection signal 19 Main steam temperature detector 19a Main steam temperature detection signal 20 Main steam pressure Detector 20a Main steam pressure detection signal 31, 65, 66 Function calculation means 32 ST first stage steam temperature signal 33 Mismatch determination means 34 Other steam turbine ventilation condition signal 35 Temperature matching control completion signal 36, 46, 56 Logical product calculation Means 40 Slight opening command signal generation and output means 41 FCB generation signal 2 Load interruption generation signal 43 OR operation means 44 Timer 45 Other steam control valve slight opening permission condition signal 47 Steam control valve slight opening command signal 48 Gas turbine speed setting signal 50 Opening after slight opening command signal generation and output means 51 1 condition satisfaction determination means 52 second condition satisfaction determination means 53 third condition satisfaction determination means 54 fourth condition satisfaction determination means 55 fifth condition satisfaction determination means 57 Steam control valve slightly open and then open command signal 60 fine opening rate limit means 61 Post-slight opening rate limiting means 63 Steam control valve opening signal 64 Steam turbine metal temperature signal 67 Difference signal between steam turbine metal temperature and steam turbine steam temperature signal

───────────────────────────────────────────────────── フロントページの続き (72)発明者 秋丸 智 東京都港区芝浦一丁目１番１号株式会社東 芝本社事務所内 Ｆターム(参考） 3G071 AA04 AA08 AB01 BA26 CA01 DA05 DA11 EA02 EA05 EA06 FA01 FA02 FA03 FA06 GA01 GA04 3G081 BA05 BA16 BB00 BC07 BD00 DA04  ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Satoshi Akimaru 1-1-1, Shibaura, Minato-ku, Tokyo F-term in Toshiba head office (reference) 3G071 AA04 AA08 AB01 BA26 CA01 DA05 DA11 EA02 EA05 EA06 FA01 FA02 FA03 FA06 GA01 GA04 3G081 BA05 BA16 BB00 BC07 BD00 DA04

Claims (7)

【特許請求の範囲】[Claims] 【請求項１】 コンバインドサイクル発電設備等に設け
る蒸気タービンへの通気を制御するタービン通気制御装
置において、 系統負荷遮断発生後、あるいは、所内単独運転後の再起
動時に微量の通気をする条件が充足した場合に、蒸気加
減弁微開指令信号を蒸気加減弁開度信号として出力する
微開指令信号生成出力手段と、 前記蒸気加減弁微開指令信号が生成出力された後に、少
なくとも主蒸気温度が蒸気タービンのメタル温度に基づ
いて定められた規定範囲内にある場合に、蒸気加減弁微
開後開指令信号を前記蒸気加減弁開度信号として出力す
る微開後開指令信号生成出力手段とを備えることを特徴
とするタービン通気制御装置。1. A turbine ventilation control device for controlling ventilation to a steam turbine provided in a combined cycle power generation facility or the like, which satisfies a condition that a small amount of ventilation is performed at the time of a system load interruption or a restart after a site alone operation. In this case, a slightly open command signal generating and outputting means for outputting a steam control valve slightly open command signal as a steam control valve opening signal, and after the steam control valve slightly open command signal is generated and output, at least the main steam temperature is reduced. A post-fine opening command signal generating and outputting means for outputting a steam control valve slightly open post-open command signal as the steam control valve opening degree signal when the steam control valve is within a specified range determined based on the metal temperature of the steam turbine. A turbine ventilation control device, comprising: 【請求項２】 前記微開指令信号生成出力手段は、系統
負荷遮断発生、あるいは、所内単独運転後の再起動時に
所定の時限後で、かつ、蒸気加減弁微開許可条件が充足
した場合に、前記蒸気加減弁微開指令信号を出力する手
段、あるいは、系統負荷遮断発生後、あるいは、所内単
独運転後の再起動時にタービン回転数が整定し、かつ、
蒸気加減弁微開許可条件を充足した場合に、前記蒸気加
減弁微開指令信号を出力する手段を備えることを特徴と
する請求項１記載のタービン通気制御装置。2. The system according to claim 1, wherein the slightly open command signal generating and outputting means is provided when a predetermined time limit is satisfied at the time of a system load interruption or a restart after the in-house independent operation, and a condition for allowing the steam control valve to be slightly opened is satisfied. Means for outputting the steam control valve slightly open command signal, or after the occurrence of system load interruption, or at the time of restart after the site alone operation, the turbine speed is settled, and,
2. The turbine ventilation control device according to claim 1, further comprising means for outputting the steam control valve slight opening command signal when the steam control valve slight opening permission condition is satisfied. 【請求項３】 前記微開後開指令信号生成出力手段は、
過熱度、主蒸気圧力等の主蒸気条件が規定範囲内にある
場合に第１ＯＮ信号を出力する第１条件成立判定手段
と、主蒸気の温度が蒸気タービンのメタル温度に基づい
て定められた規定範囲内にある場合に、第２ＯＮ信号を
出力する第２条件成立判定手段と、発電機負荷が初負荷
以上である場合に、第３ＯＮ信号を出力する第３条件成
立判定手段と、ガスタービンの排ガス温度設定値が蒸気
タービンメタル温度に基づいて定められた規定範囲内に
ある場合に、第４ＯＮ信号を出力する第４条件成立判定
手段と、タービンバイパス弁開度が規定値以上である場
合に第５ＯＮ信号を出力する第５条件成立判定手段と、
前記蒸気加減弁微開指令信号が生成出力された後に、前
記第１ＯＮ信号乃至前記第５ＯＮ信号の５信号の内で、
少なくとも第２ＯＮ信号と第４ＯＮ信号とを入力した場
合に蒸気加減弁微開後開指令信号を出力し、あるいは、
前記５信号の全てのＯＮ信号を入力した場合に、蒸気加
減弁微開後開指令信号を出力する信号演算手段とを備え
ることを特徴とする請求項１記載のタービン通気制御装
置。3. The post-fine opening command signal generation and output means,
First condition satisfaction determining means for outputting a first ON signal when main steam conditions such as superheat degree and main steam pressure are within a specified range; and a rule in which the temperature of the main steam is determined based on the metal temperature of the steam turbine. A second condition determination means for outputting a second ON signal when the value is within the range; a third condition satisfaction determination means for outputting a third ON signal when the generator load is equal to or more than the initial load; A fourth condition satisfaction determination unit that outputs a fourth ON signal when the exhaust gas temperature set value is within a specified range defined based on the steam turbine metal temperature; and a case where the turbine bypass valve opening is equal to or more than a specified value. Fifth condition satisfaction determination means for outputting a fifth ON signal;
After the steam control valve slight opening command signal is generated and output, of the five signals of the first ON signal to the fifth ON signal,
When at least the second ON signal and the fourth ON signal are inputted, the steam control valve is slightly opened and the open command signal is output, or
2. The turbine ventilation control device according to claim 1, further comprising: signal calculation means for outputting an open command signal after slightly opening the steam control valve when all of the five signals are input. 【請求項４】 前記微開指令信号生成出力手段は、前記
蒸気加減弁微開指令信号の上限側を所定の変化率で制限
して蒸気加減弁開度指令信号として出力する微開レート
リミット手段を備える一方、前記微開後開指令信号生成
出力手段は、前記蒸気加減弁微開後開指令信号の上限側
を所定の変化率で制限して蒸気加減弁開度指令信号とし
て出力する微開後レートリミット手段とを備えることを
特徴とする請求項１乃至請求項３記載のいずれかのター
ビン通気制御装置。4. A slightly opening rate limiting means for limiting the upper limit side of the steam adjusting valve slight opening command signal at a predetermined rate of change and outputting the same as a steam adjusting valve opening degree command signal. On the other hand, the slightly-opened post-opening command signal generation output means limits the upper limit side of the slightly-opened steam control valve command signal at a predetermined rate of change, and outputs the same as a steam control valve opening degree command signal. The turbine ventilation control device according to any one of claims 1 to 3, further comprising a post rate limiting means. 【請求項５】 前記微開指令信号生成出力手段は、前記
蒸気加減弁微開指令信号の上限側を所定の設定変化率で
制限して蒸気加減弁開度信号として出力する微開レート
リミット手段と、蒸気タービンメタル温度に応じて予め
定める関数に従って前記微開レートリミット手段に設定
される設定変化率を設定する関数演算手段とを備える一
方、 前記微開後開指令信号生成出力手段は、前記蒸気加減弁
微開後開指令信号の上限側を所定の設定変化率で制限し
て蒸気加減弁開度信号として出力する微開後レートリミ
ット手段と、蒸気タービンメタル温度に応じて予め定め
る関数に従って前記微開後レートリミット手段に設定さ
れる設定変化率を設定する関数演算手段とを備えること
を特徴とする請求項１乃至請求項３記載のいずれかのタ
ービン通気制御装置。5. A fine opening rate limit means for generating and outputting a steam control valve opening degree signal by restricting an upper limit side of the steam control valve slight opening command signal at a predetermined set change rate. And a function calculating means for setting a set change rate set in the fine opening rate limit means according to a function predetermined according to the steam turbine metal temperature. A post-slight rate limiting means for limiting the upper limit side of the steam control valve open command signal after a slight opening at a predetermined set change rate and outputting the same as a steam control valve opening signal, and a function predetermined according to the steam turbine metal temperature. The turbine ventilation system according to any one of claims 1 to 3, further comprising a function calculating means for setting a set change rate set in the rate limiting means after the slight opening. Apparatus. 【請求項６】 前記微開指令信号生成出力手段は、前記
蒸気加減弁微開指令信号の上限側を所定の設定変化率で
制限して蒸気加減弁開度信号として出力する微開レート
リミット手段と、蒸気タービンメタル温度と蒸気タービ
ン蒸気温度との偏差に応じて予め定める関数に従って前
記微開レートリミット手段に設定される設定変化率を設
定する関数演算手段とを備える一方、 前記微開後開指令信号生成出力手段は、前記蒸気加減弁
微開後開指令信号の上限側を所定の設定変化率で制限し
て蒸気加減弁開度信号として出力する微開後レートリミ
ット手段と、蒸気タービンメタル温度と蒸気タービン蒸
気温度との偏差に応じて予め定める関数に従って前記微
開後レートリミット手段に設定される設定変化率を設定
する関数演算手段とを備えることを特徴とする請求項１
乃至請求項３記載のいずれかのタービン通気制御装置。6. A slight opening rate limiting means for limiting the upper limit of the steam control valve slight opening command signal at a predetermined set change rate and outputting the same as a steam control valve opening signal. And a function calculating means for setting a set change rate set in the fine opening rate limit means in accordance with a predetermined function according to a deviation between the steam turbine metal temperature and the steam turbine steam temperature. A command signal generation and output means, a post-fine opening rate limit means for restricting the upper limit side of the steam control valve slight post-opening command signal at a predetermined set change rate and outputting as a steam control valve opening degree signal; Function calculating means for setting a set change rate set in the post-slightly opening rate limit means in accordance with a predetermined function according to a deviation between the temperature and the steam turbine steam temperature. Claim the symptom 1
The turbine ventilation control device according to any one of claims 3 to 3. 【請求項７】 前記微開指令信号生成出力手段は、前記
蒸気加減弁微開指令信号の上限側を所定の設定変化率で
制限して蒸気加減弁開度信号として出力する微開レート
リミット手段と、蒸気タービンメタル温度とこの蒸気タ
ービンメタル温度と蒸気タービン蒸気温度との偏差とに
応じて予め定める関数に従って前記微開レートリミット
手段に設定される設定変化率を設定する関数演算手段と
を備える一方、 前記微開後開指令信号生成出力手段は、前記蒸気加減弁
微開後開指令信号の上限側を所定の設定変化率で制限し
て蒸気加減弁開度信号として出力する微開後レートリミ
ット手段と、蒸気タービンメタル温度とこの蒸気タービ
ンメタル温度と蒸気タービン蒸気温度との偏差とに応じ
て予め定める関数に従って前記微開後レートリミット手
段に設定される設定変化率を設定する関数演算手段とを
備えることを特徴とする請求項１乃至請求項３記載のい
ずれかのタービン通気制御装置。7. A fine opening rate limiting means for limiting the upper limit of the steam control valve slight opening command signal at a predetermined change rate and outputting the same as a steam control valve opening signal. And a function calculating means for setting a set change rate set in the slightly opening rate limit means according to a function predetermined according to a steam turbine metal temperature and a deviation between the steam turbine metal temperature and the steam turbine steam temperature. On the other hand, the post-fine opening command signal generation and output means restricts the upper limit side of the post-steam opening / closing valve slight opening command signal at a predetermined set change rate and outputs as a steam control valve opening degree signal. Limit means, and the rate limit means after slight opening according to a function predetermined according to a steam turbine metal temperature and a deviation between the steam turbine metal temperature and the steam turbine steam temperature. Either turbine venting control apparatus of claim 1 to claim 3, wherein the and a function operation unit for setting a setting change rate set.
JP10368962A 1998-12-25 1998-12-25 Turbine ventilation controller Pending JP2000192804A (en)

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JP2009057976A (en) * 2007-08-31 2009-03-19 General Electric Co <Ge> Power generation system including exhaust gas temperature adjusting device and method for controlling temperature of exhaust gas
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JP2009057976A (en) * 2007-08-31 2009-03-19 General Electric Co <Ge> Power generation system including exhaust gas temperature adjusting device and method for controlling temperature of exhaust gas
JP2009209931A (en) * 2008-02-29 2009-09-17 General Electric Co <Ge> System and method for channeling steam into turbine
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JP2015143517A (en) * 2013-12-25 2015-08-06 株式会社東芝 Control device and activation method
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