JPS5810103A - Turbine controller - Google Patents
Turbine controllerInfo
- Publication number
- JPS5810103A JPS5810103A JP10709981A JP10709981A JPS5810103A JP S5810103 A JPS5810103 A JP S5810103A JP 10709981 A JP10709981 A JP 10709981A JP 10709981 A JP10709981 A JP 10709981A JP S5810103 A JPS5810103 A JP S5810103A
- Authority
- JP
- Japan
- Prior art keywords
- turbine
- speed
- valve
- pressure turbine
- warming
- 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.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D19/00—Starting of machines or engines; Regulating, controlling, or safety means in connection therewith
- F01D19/02—Starting of machines or engines; Regulating, controlling, or safety means in connection therewith dependent on temperature of component parts, e.g. of turbine-casing
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Turbines (AREA)
Abstract
Description
【発明の詳細な説明】
本発明はタービンバイパス系統を有した火力発電設備に
係り、特に中圧タービン起動を行なう場合に好適な高圧
タービンのウオーミング手法を提供することにある。中
圧タービンは、高圧タービンと比較し圧力の低い蒸気の
流入を可能としているため、中圧タービン起動はボイラ
の圧力が低いうちにタービンを起動出来、プラントの短
時間起動を実現するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a thermal power generation facility having a turbine bypass system, and an object of the present invention is to provide a high-pressure turbine warming method suitable for starting an intermediate-pressure turbine. Since intermediate pressure turbines allow the inflow of steam with lower pressure than high pressure turbines, intermediate pressure turbine startup allows the turbine to be started while the boiler pressure is low, achieving plant startup in a short time. .
高圧タービンのウオーミングを実施するには、高圧ター
ビンに流入する蒸気流量を微小量に保つこと、即ち、加
減弁を１％以下の微小開度に保つことが必要となるが、
加減弁の開き始め雇は蒸気条件等によシ変動するため、
弁開度を検出して微小流量を得る方式は起動のたびに同
一あ微小流量を安定して確保出来ないという欠点があっ
た。弁開度がずれて流量が少ない場合には高圧タービン
を充分に暖機することが出来ず、また、流量が流れ過ぎ
た場合には、中圧タービンへの流入蒸気を零にしても、
所定のタービン速度を超えてしまうことがある。In order to warm the high-pressure turbine, it is necessary to keep the flow rate of steam flowing into the high-pressure turbine at a minute amount, that is, to keep the regulating valve at a minute opening of 1% or less.
The time at which the control valve begins to open varies depending on steam conditions, etc.
The method of obtaining a minute flow rate by detecting the valve opening has the disadvantage that it is not possible to stably secure the same minute flow rate each time the system is started. If the valve opening is off and the flow rate is low, the high-pressure turbine cannot be warmed up sufficiently, and if the flow rate is too high, even if the steam flowing into the intermediate-pressure turbine is reduced to zero,
The predetermined turbine speed may be exceeded.
一方、高圧タービイの出口圧力等を検出して流量を直接
検出する方式があるが、真空に近い圧力下での微小圧力
の変化を求めるのは定格負荷運転時はぼ定格圧力まで上
昇する場所であるため圧力検出器の精度面から困難であ
る。On the other hand, there is a method that directly detects the flow rate by detecting the outlet pressure of a high-pressure turbine, but it is necessary to measure minute pressure changes under near-vacuum pressure at locations where the pressure rises to almost the rated pressure during rated load operation. This is difficult due to the accuracy of the pressure detector.
本発明は、加減弁の微小開度を蒸気条件の変動にかかわ
らず、確保する方式を提供することにある。An object of the present invention is to provide a method for ensuring a minute opening of a control valve regardless of fluctuations in steam conditions.
本発明では、加減弁の微小開度に相当する流量をタービ
ン速度により検出して、蒸気条件などの変動による加減
弁開き始め点のずれ等が悪影響を与えないよう考慮して
いる。In the present invention, the flow rate corresponding to the minute opening of the regulating valve is detected based on the turbine speed, and consideration is given to preventing a shift in the opening start point of the regulating valve due to fluctuations in steam conditions, etc. from having an adverse effect.
第１図はタービンバイパス系統を有する火力発電設備の
一例を示す。ボイラｌにより発生した蒸気は加減弁２を
経て高圧タービン３に流入する。FIG. 1 shows an example of a thermal power generation facility having a turbine bypass system. Steam generated by the boiler l flows into the high pressure turbine 3 via the control valve 2.
高圧タービン３で仕事した蒸気は再熱器４で再度加熱さ
れ、インターセプト弁５を経て中圧タービン６に流入す
る。蒸気は中圧タービン６、低圧タービン７で仕事をし
復水器８で水となる。タービンで仕事したエネルギは回
転トルクに変換され発電機９に送′られ、電力を発生さ
せる。バイパス系統としては高圧タービンを゛バイパス
させる高圧タービンバイパス弁１０と中低圧タービンを
バイパスさせる低圧タービンバイパス弁１１を設けてい
る。タービン制御装置１３はタービンの速度を速度検出
器１２で検出してタービン起動を制御するため加減弁２
．インターセプト弁５を開閉するものである。The steam worked in the high pressure turbine 3 is heated again in the reheater 4 and flows into the intermediate pressure turbine 6 via the intercept valve 5. The steam performs work in an intermediate pressure turbine 6 and a low pressure turbine 7, and becomes water in a condenser 8. The energy worked by the turbine is converted into rotational torque and sent to the generator 9 to generate electric power. The bypass system includes a high-pressure turbine bypass valve 10 that bypasses the high-pressure turbine and a low-pressure turbine bypass valve 11 that bypasses the medium and low pressure turbines. The turbine control device 13 detects the speed of the turbine with a speed detector 12 and controls the startup of the turbine using a regulating valve 2.
．． It opens and closes the intercept valve 5.
タービン起動時は、加減弁２は全閉、インターセプト弁
は開となり、インターセプト弁の開度を調節することに
よジタービン速度を制御する。この場合高圧タービンバ
イパス弁１０．中低圧タービンバイパス弁１１は開状態
となっている。このようなタービン起動をコールド起動
で実施する場合には、加減弁２を微開して高圧タービン
３にわずかな蒸気を流して高圧タービンを暖ためる必要
がある。本発明ではこの加減弁２の微開状態を確認する
ためタービン速度をとらえている。第２図に以上のター
ビン起動時の加減弁、インターセプト弁の弁開度とター
ビン速度の関係を表わした。When the turbine is started, the regulator valve 2 is fully closed and the intercept valve is open, and the turbine speed is controlled by adjusting the opening degree of the intercept valve. In this case high pressure turbine bypass valve 10. The medium and low pressure turbine bypass valve 11 is in an open state. When such a turbine startup is performed by cold startup, it is necessary to slightly open the regulating valve 2 to allow a small amount of steam to flow into the high-pressure turbine 3 to warm the high-pressure turbine. In the present invention, the turbine speed is measured in order to confirm the slightly open state of the regulating valve 2. FIG. 2 shows the relationship between the valve openings of the control valve and intercept valve and the turbine speed at the time of starting the turbine.
タービン起動時は最初加減弁２を開く。タービン速度が
ウオーミングに相当する蒸気流量の速度に達すると、加
減弁２による速度制御を止め、加減弁２の開度を一定に
保つ。一方、タービン速度はインターセプト弁を開する
ことによシ上昇する。When starting the turbine, the regulator valve 2 is first opened. When the turbine speed reaches a steam flow rate corresponding to warming, speed control by the regulator valve 2 is stopped and the opening degree of the regulator valve 2 is kept constant. Meanwhile, the turbine speed is increased by opening the intercept valve.
ウオーミング速度１０００Ｒ，ＰＭに到達すると速度上
昇を止めて一定速度表なるようインターセプト弁を調整
する。高圧タービンが暖められてウオーミングが終了す
ると、加減弁を徐々に全閉方向に閉する。このときイン
ターセプト弁５は速度偏差によシ徐々に関し、タービン
速度を一定に維持する。When the warming speed reaches 1000R, PM, the speed increase is stopped and the intercept valve is adjusted to maintain a constant speed. When the high-pressure turbine is warmed up and warming is completed, the regulator valve is gradually closed in the fully closed direction. The intercept valve 5 then gradually reacts to the speed deviation and maintains the turbine speed constant.
第３図、第４図は本発明の制御内容を示す制御系統図で
ある。第３図で目標速度発生部３０は第２図のタ−ビン
起動を得るよう時間の経過とともに対応する速度相当信
号を出力するものである。FIGS. 3 and 4 are control system diagrams showing control details of the present invention. In FIG. 3, a target speed generating section 30 outputs a corresponding speed equivalent signal over time so as to obtain the turbine start-up shown in FIG. 2.
タービン速度は速度検出器１２で検出され偏差検出部３
１で目標速度発生部３ｏからの信号とつき合わされ、速
度偏差信号ΔＮを得る。ＰＩ調節部３２では偏差信号Δ
Ｎに対応した加減弁、インターセプト弁の操作量を決定
する。操作量は接点３３．３４を経て加減弁開度調節部
３５、インターセプト弁開度調節部３６に加えられ、加
減弁２、インターセプト弁５を開閉する。第４図のリレ
ー回路でウオーミングを実施する場合にはリレーＸ１が
励磁され、第３図の接点３３がＯＮし接点３４ｆｌＯＦ
Ｆする。この結果、加減弁２にてタービン速度を上昇さ
れる。タービン速度が２０ＯＲＰＭに到達すると第４図
の接点Ｂが０ＦＦＬ’Ｊレー・Ｘｌは解磁され、第３図
の接点３３はＯＦ Ｆ。The turbine speed is detected by the speed detector 12 and the deviation detector 3
1, it is compared with the signal from the target speed generator 3o to obtain a speed deviation signal ΔN. In the PI adjustment section 32, the deviation signal Δ
Determine the operation amount of the control valve and intercept valve corresponding to N. The manipulated variable is applied to the control valve opening adjustment section 35 and the intercept valve opening control section 36 through contacts 33 and 34, thereby opening and closing the control valve 2 and the intercept valve 5. When performing warming with the relay circuit shown in Fig. 4, relay X1 is excited, contact 33 shown in Fig. 3 is turned on, and contact 34flOF
F. As a result, the turbine speed is increased by the regulator valve 2. When the turbine speed reaches 20 ORPM, contact B in FIG. 4 is demagnetized, and contact 33 in FIG. 3 is OFF.
接点３４はＯＮとなシ、タービン速度はインターセプト
弁５により制御され、加減弁２は一定開度に保たれる。The contact point 34 is kept ON, the turbine speed is controlled by the intercept valve 5, and the regulating valve 2 is kept at a constant opening.
インターセプト弁によシ昇速しでウオーミング速度１１
０００ＲＰに達すると速度は保持される。タービンのメ
タ次が暖ま・る時間を経過するとウオーミング完了条件
が成立し第４図の接点ＣがＯＮしてリレーＸ２が励磁さ
れる。Ｘ２が励磁されると第３図の接点３８がｏＮし、
閉信号発生部３７からの閉操作信号が加減弁調節部３５
に印加し、加減弁を閉する。この間、加減弁が閉じたこ
とによる速度の低下を検出し、その低下を補償するため
ＰＩ調節部ｊ２、インターセプト弁開度調節部３６を経
てインターセプト弁５を開する。加減弁２が全閉すると
第４図の接点りがＯＦＦしリレーＸ２が解磁され、第３
図の接点３８がＯＦＦして加減弁の閉操作は完了する。Warming speed 11 by increasing speed by intercept valve
Once 000RP is reached, the speed is maintained. When the time for the turbine to warm up has elapsed, the warming completion condition is satisfied, contact C in FIG. 4 is turned on, and relay X2 is energized. When X2 is excited, the contact 38 in FIG. 3 turns on,
A closing operation signal from the closing signal generating section 37 is sent to the control valve adjusting section 35.
and close the control valve. During this time, a decrease in speed due to the closing of the control valve is detected, and in order to compensate for the decrease, the intercept valve 5 is opened via the PI adjustment section j2 and the intercept valve opening adjustment section 36. When the regulator valve 2 is fully closed, the contact shown in Fig. 4 turns OFF, the relay X2 is demagnetized, and the third
The contact 38 shown in the figure turns OFF and the closing operation of the control valve is completed.
以上の一連の操作によシ高圧タービンウオーミングに必
要な加減弁の微小開度を確保し、ウオーミング完了後は
速やかに加減弁を全閉出来る。Through the above series of operations, the minute opening degree of the regulator valve necessary for high-pressure turbine warming is ensured, and the regulator valve can be fully closed immediately after warming is completed.
一方、本発明はコンピュータを活用しても同様に実施出
来る。コンピュータを使用した実施例のフローチャート
を第５図に示す。同図でＰｃｖ 。On the other hand, the present invention can be similarly implemented using a computer. A flowchart of an embodiment using a computer is shown in FIG. In the same figure, Pcv.
ＰＩＣＶは各々、加減弁、インターセプト弁の開度信号
、ΔＮ＋は今回サンプリングの速度偏差、ΔＮ＋−１は
前回サンプリングの速度偏差、ＫＰ。PICV is the opening signal of the control valve and intercept valve, ΔN+ is the speed deviation of the current sampling, ΔN+-1 is the speed deviation of the previous sampling, and KP.
Ｋｔはそれぞれ、比例、積分のゲインを示す。またΔＰ
は閉操作量を示す。Kt indicates proportional and integral gains, respectively. Also ΔP
indicates the closing operation amount.
本発明は、インターセプト弁によるタービン速度制御時
、高圧タービンのウオーミングのために要する微小流量
に相当する加減弁の微小開度を得るため、その微小流量
に相当するタービン速度を検出することによシ開度を求
める方式をとっている。このため蒸気条件の変動、ある
いは加減弁の開き始め位置がずれても確実に加減弁の弁
開度を求めることが出来る効果がある。When controlling the turbine speed using an intercept valve, the present invention detects the turbine speed corresponding to the minute flow rate in order to obtain a minute opening of the regulator valve that corresponds to the minute flow rate required for warming the high-pressure turbine. A method is used to determine the degree of opening. Therefore, even if the steam conditions change or the opening position of the control valve shifts, the opening degree of the control valve can be determined reliably.
第１図は本発明のシステム構成を、第２図はタービン起
動曲線を示す。第３図は本発明の一実施例を示す制御系
統図、第４図は一実施例を示すリレー回路、第５図は計
算機を使用したフローチャートの例を示す。
１・・・ボイラ、２・・・加減弁、３・・・高圧タービ
ン、４再熱器、５・・・インターセプト弁、６・・・中
圧タービン、７・・・低圧タービン、８・・・復水器、
９・・・発電機、１０・・・高圧タービンバイパス弁、
１１・・・中低圧タービンバイパス弁、１２・・・速度
検出器、１３・・・タービン制御装置、３０・・・目標
速度発生部、３１・・・偏差検出部、３２・・・ＰＩ調
節部、３３，３４゜３８・・・接点、３５・・・加減弁
開度調節部、３６・・・イ茅２躬
′１１３図FIG. 1 shows the system configuration of the present invention, and FIG. 2 shows the turbine startup curve. FIG. 3 is a control system diagram showing one embodiment of the present invention, FIG. 4 is a relay circuit showing one embodiment, and FIG. 5 is an example of a flowchart using a computer. DESCRIPTION OF SYMBOLS 1...Boiler, 2...Adjustment valve, 3...High pressure turbine, 4...Reheater, 5...Intercept valve, 6...Intermediate pressure turbine, 7...Low pressure turbine, 8...・Condenser,
9... Generator, 10... High pressure turbine bypass valve,
DESCRIPTION OF SYMBOLS 11... Medium and low pressure turbine bypass valve, 12... Speed detector, 13... Turbine control device, 30... Target speed generation part, 31... Deviation detection part, 32... PI adjustment part , 33, 34゜38...Contact, 35...Adjustment valve opening adjustment part, 36...I-2'113
Claims (1)
入し、さらに再熱器、インターセプト弁を経て中圧ター
ビンに流入する発電設備において、高圧ターヒン、中低
圧タービンをバイパススルバイパス弁をそれぞれ具備し
、タービン起動時はインターセプト弁によジタービン速
度を制御すると同時に、高圧）−ビンのウオーミングの
ための加減弁の微小開度をタービン速度に応じて定める
ことを特徴としたタービン制御装置。In power generation equipment where steam from the boiler flows into the high-pressure turbine through a control valve, and then into the medium-pressure turbine through the reheater and intercept valve, the high-pressure turbine and medium-low pressure turbine are each equipped with bypass valves. When the turbine is started, the turbine speed is controlled by an intercept valve, and at the same time, the minute opening degree of the control valve for warming the high pressure bottle is determined according to the turbine speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10709981A JPS5810103A (en) | 1981-07-10 | 1981-07-10 | Turbine controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10709981A JPS5810103A (en) | 1981-07-10 | 1981-07-10 | Turbine controller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5810103A true JPS5810103A (en) | 1983-01-20 |
| JPS642762B2 JPS642762B2 (en) | 1989-01-18 |
Family
ID=14450429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10709981A Granted JPS5810103A (en) | 1981-07-10 | 1981-07-10 | Turbine controller |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5810103A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61115561A (en) * | 1984-11-09 | 1986-06-03 | オ−ジ−技研株式会社 | Low temperature air generator built-in type low temperature treatment apparatus |
| JPH01313605A (en) * | 1988-06-10 | 1989-12-19 | Mitsubishi Heavy Ind Ltd | Combined power generating set |
| JPH0346012A (en) * | 1989-07-13 | 1991-02-27 | Hitachi Ltd | Turbine controller |
| JP2003535251A (en) * | 2000-05-31 | 2003-11-25 | シーメンス アクチエンゲゼルシヤフト | Operating method and device for no-load or light-load operation of multi-stage steam turbine |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54102A (en) * | 1977-06-03 | 1979-01-05 | Hitachi Ltd | Turbine starting system |
-
1981
- 1981-07-10 JP JP10709981A patent/JPS5810103A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54102A (en) * | 1977-06-03 | 1979-01-05 | Hitachi Ltd | Turbine starting system |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61115561A (en) * | 1984-11-09 | 1986-06-03 | オ−ジ−技研株式会社 | Low temperature air generator built-in type low temperature treatment apparatus |
| JPS6344372B2 (en) * | 1984-11-09 | 1988-09-05 | Oji Giken Kk | |
| JPH01313605A (en) * | 1988-06-10 | 1989-12-19 | Mitsubishi Heavy Ind Ltd | Combined power generating set |
| JPH0346012A (en) * | 1989-07-13 | 1991-02-27 | Hitachi Ltd | Turbine controller |
| JP2003535251A (en) * | 2000-05-31 | 2003-11-25 | シーメンス アクチエンゲゼルシヤフト | Operating method and device for no-load or light-load operation of multi-stage steam turbine |
| JP4707927B2 (en) * | 2000-05-31 | 2011-06-22 | シーメンス アクチエンゲゼルシヤフト | Operation method and apparatus for multi-stage steam turbine during no-load or light-load operation |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS642762B2 (en) | 1989-01-18 |
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