JPH05195713A - Turbine starting device - Google Patents
Turbine starting deviceInfo
- Publication number
- JPH05195713A JPH05195713A JP706392A JP706392A JPH05195713A JP H05195713 A JPH05195713 A JP H05195713A JP 706392 A JP706392 A JP 706392A JP 706392 A JP706392 A JP 706392A JP H05195713 A JPH05195713 A JP H05195713A
- Authority
- JP
- Japan
- Prior art keywords
- control
- valve
- opening
- logic
- generator output
- 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
Links
Landscapes
- Control Of Turbines (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は火力発電所における蒸気
タービンの起動過程において行なわれるメインストップ
バルブの子弁であるバイパスバルブ（以降ＭＳＶ−ＢＶ
と略す）からコントロールバルブ（以降ＣＶと略す）へ
の制御対象弁の切替え操作時の制御に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bypass valve (hereinafter referred to as MSV-BV) which is a slave valve of a main stop valve which is carried out in the starting process of a steam turbine in a thermal power plant.
Abbreviated) to a control valve (hereinafter abbreviated as CV) regarding the control operation at the time of switching operation of the controlled valve.
【０００２】[0002]
【従来の技術】タービン制御装置は、通常タービン回転
数の昇速制御と系統へ並入後の定格負荷の15％程度まで
の発電機出力制御をＭＳＶ−ＢＶにて行ない、15％以上
からの発電機出力制御をＣＶにて行なう。このため、制
御装置は発電機出力15％付近での制御対象弁をＭＳＶ−
ＢＶからＣＶへ切替える回路をもつ。図２は従来の弁切
替え回路による制御装置を示す。以下に従来の弁切替回
路について説明する。2. Description of the Related Art Turbine control equipment normally controls the speed of turbine rotation speed and generator output control up to about 15% of the rated load after parallel entry into the system by MSV-BV. CV controls the generator output. For this reason, the control unit sets the controlled valve to MSV-
It has a circuit to switch from BV to CV. FIG. 2 shows a control device using a conventional valve switching circuit. The conventional valve switching circuit will be described below.
【０００３】図２のタービン起動装置１は弁制御モータ
27の位置制御を行なうことにより、そのモータとリンク
した機構部である弁駆動部28を介してＣＶ29，ＭＳＶ−
ＢＶ30の開度を調節し、タービン流入蒸気量を加減す
る。The turbine starting device 1 of FIG. 2 is a valve control motor.
By controlling the position of 27, a CV 29, MSV-
Adjust the opening of BV30 to adjust the amount of steam entering the turbine.
【０００４】本タービン起動装置１において弁切替信号
発生部６からの切替信号により、ＭＳＶ弁（前）蒸気圧
力検出器36からの蒸気圧力と、ＭＳＶ弁（後）蒸気圧力
検出器37からの蒸気圧力がＭＳＶ弁前後蒸気差圧検出部
（２）32により比較され、差圧が小さい間は、高速パル
ス発生部35，ＯＲロジック20により、制御弁モータ27が
駆動されＣＶが閉方向に間欠に制御される。ＣＶが閉方
向に動くと蒸気差圧は大きくなる方向に発生し、一定値
以上になると、パルス信号は高速パルス発生部35から低
速パルス発生部19に切替えられ、同様にＯＲロジック20
を通して低速パルスにてＣＶは閉方向に制御される。そ
れにより、更に差圧が大きくなるとＭＳＶ前後蒸気差圧
検出部（１）31は差圧大の信号を発生する。この信号は
タイマー33により一定時間後、ＯＲロジック26を介して
ＭＳＶ−ＢＶ30を開方向に駆動し、ＭＳＶ−ＢＶが全開
となったところで弁切替え制御が終了する。尚、弁切替
制御のバックアップとして発電機出力検出器５からの信
号を弁切替信号発生直後に一度発電機出力メモリ部８に
てメモリし、このメモリされた発電機出力と、切替中の
発電機出力とを発電機出力比較部10にて比較し、発電機
出力が降下すると発電機出力差信号39がＯＮし、タイマ
ー34を介してＭＳＶ−ＢＶ30を開き、出力下降を防止す
る。In the turbine starter 1, the switching signal from the valve switching signal generator 6 causes the steam pressure from the MSV valve (front) steam pressure detector 36 and the steam from the MSV valve (rear) steam pressure detector 37. The pressures are compared by the steam differential pressure detector (2) 32 before and after the MSV valve, and while the differential pressure is small, the high speed pulse generator 35 and the OR logic 20 drive the control valve motor 27 to intermittently close the CV in the closing direction. Controlled. When the CV moves in the closing direction, the vapor pressure difference is increased, and when it exceeds a certain value, the pulse signal is switched from the high-speed pulse generator 35 to the low-speed pulse generator 19, and the OR logic 20 is also used.
The CV is controlled in the closing direction by a low speed pulse. As a result, when the differential pressure further increases, the vapor differential pressure detector (1) 31 before and after the MSV generates a large differential pressure signal. This signal drives the MSV-BV 30 in the opening direction via the OR logic 26 after a predetermined time by the timer 33, and the valve switching control ends when the MSV-BV is fully opened. As a backup for the valve switching control, the signal from the generator output detector 5 is once stored in the generator output memory unit 8 immediately after the valve switching signal is generated, and the stored generator output and the generator being switched are stored. The generator output comparing unit 10 compares the output with the generator output, and when the generator output drops, the generator output difference signal 39 turns ON, the MSV-BV 30 is opened via the timer 34, and the output drop is prevented.
【０００５】[0005]
【発明が解決しようとする課題】従来のタービン起動装
置では次の欠点がある。The conventional turbine starter has the following drawbacks.
【０００６】ＭＳＶ−ＢＶからＣＶへ切替える時発電機
出力の変動が発生し、その変動量も蒸気温度等により一
定しないことと、弁切替え制御開始から弁切替え完了ま
で比較的長い時間を要することである。When switching from MSV-BV to CV, the generator output fluctuates, and the fluctuation amount is not constant due to steam temperature and the like, and it takes a relatively long time from the start of valve switching control to the completion of valve switching. is there.
【０００７】[0007]
【課題を解決するための手段】火力発電の蒸気タービン
への蒸気流量の制御弁と制御弁駆動部とこの制御弁駆動
部に制御指令を与えて蒸気流量を制御するための制御用
コントローラをもったタービン起動装置において、ター
ビン起動後の発電機出力増加過程でバイパスバルブから
コントロールバブルへ制御対象を切替える場合、コント
ロールバルブ適用開度計算部とバイパスバルブの間欠開
方向動作回路とコントロールバルブの連続閉方向動作回
路を備える。A control valve for controlling a steam flow rate to a steam turbine for thermal power generation, a control valve drive section, and a control controller for giving a control command to the control valve drive section to control the steam flow rate. In the turbine starter, when switching the control target from the bypass valve to the control bubble in the process of increasing the generator output after the turbine is started, the control valve applicable opening calculation part and the intermittent operation direction circuit of the bypass valve and the continuous closing of the control valve are closed. A direction operation circuit is provided.
【０００８】[0008]
【作用】弁切替制御開始直前の主蒸気圧力と温度及び発
電機出力からＣＶの弁特性上から出力変動の発生しない
適性開度を求め、その開度＋αまで連続でＣＶを閉方向
に制御し、その後は一度ＭＳＶ−ＢＶを開方向に間欠で
動かし、発電機出力を少し上昇させ、その上昇分をＣＶ
を間欠制御により更に絞り込んで補正し、弁切替制御直
前の発電機出力へ戻ったところでＭＳＶ−ＢＶを全開と
する弁切替制御回路とする。[Function] From the main steam pressure and temperature immediately before the start of valve switching control and the generator output, an appropriate opening that does not cause output fluctuation is determined from the CV valve characteristics, and the CV is continuously controlled to the opening + α in the closing direction. , After that, once move the MSV-BV intermittently in the opening direction, slightly increase the generator output, and increase the increase by CV.
Is further narrowed down by intermittent control, and is corrected, and when returning to the generator output immediately before the valve switching control, the MSV-BV is fully opened to provide a valve switching control circuit.
【０００９】[0009]
【実施例】本発明の実施例を図面を参照して説明する。
図１は本発明によるタービン起動装置の弁切替制御回路
部分である。Embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a valve switching control circuit portion of a turbine starting device according to the present invention.
【００１０】主蒸気圧力検出器２からの圧力信号，主蒸
気温度検出器３からの温度信号及び弁切替信号発生部６
からの切替信号発生直後の発電機出力検出器５からの発
電機出力が発電機出力メモリ部８にてメモリされている
発電機出力信号とからＣＶ適正開度計算部７にて、弁切
替時の発電機出力変動が最少となるＣＶ開度を計算す
る。これにより求められたＣＶ開度と以降の切替制御中
のＣＶ開度検出器４で検出したＣＶ実開度との差をＣＶ
開度比較部９にて比較し、実開度が５％以上大きい時、
ＣＶ「開度差５％以上」信号11がＯＮする。A pressure signal from the main steam pressure detector 2, a temperature signal from the main steam temperature detector 3, and a valve switching signal generator 6
The generator output signal from the generator output detector 5 immediately after the switch signal is generated from the generator output signal stored in the generator output memory unit 8 is used by the CV proper opening calculation unit 7 to switch the valve. The CV opening that minimizes the generator output fluctuation is calculated. The difference between the CV opening thus obtained and the CV actual opening detected by the CV opening detector 4 during the subsequent switching control is CV.
When compared with the opening degree comparison unit 9, when the actual opening degree is larger than 5%,
The CV "opening difference 5% or more" signal 11 is turned on.
【００１１】発電機出力比較部10は前記発電機出力メモ
リ部８にてメモリされた弁切替制御開始直後の発電機出
力と切替制御中の発電機実出力を比較し、その差によ
り、発電機出力差「＋２％以上」信号12と発電機出力差
「０％以上」信号13及び発電機出力差「−２％以上」信
号14を出力する。The generator output comparing unit 10 compares the generator output immediately after the start of the valve switching control stored in the generator output memory unit 8 with the actual output of the generator under the switching control. An output difference "+ 2% or more" signal 12, a generator output difference "0% or more" signal 13 and a generator output difference "-2% or more" signal 14 are output.
【００１２】弁切替制御開始直後はＣＶ「開度差５％以
上」信号11はＯＮとなっているためＡＮＤロジック15、
ＯＲロジック20により、ＣＶ29は閉方向へ連続制御され
目標開度の５％上で停止する。それによりＡＮＤロジッ
ク21の条件が成立し、パルス発生部22及びＯＲロジック
26よりＭＳＶ−ＢＶ30が開方向へ間欠制御される。その
結果発電機出力が増加し、発電機出力差「＋２％以上」
信号12がＯＮし、ＭＳＶ−ＢＶの開制御が停止する。そ
れと同時にＡＮＤロジック16の条件が成立し、ラッチロ
ジック17が動作し、ＡＮＤロジック18の入力条件である
発電機出力差「０％以上」信号13がＯＦＦするまでパル
ス発生部19、ＯＲロジック20によりＣＶが閉方向へ間欠
制御される。発電機出力差「０％以上」信号13がＯＦＦ
すると、ＡＮＤロジック23、ＯＲロジック25，26により
ＭＳＶ−ＢＶは全開方向へ連続制御され、弁切替制御が
完了する。尚、弁切替制御のバックアップとして発電機
出力差「−２％以上」信号14がＯＦＦした時は直ちにＡ
ＮＤロジック24、ＯＲロジック25，26によりＭＳＶ−Ｂ
Ｖは全開方向へ連続制御させ、それ以上の発電機出力降
下を抑える。Immediately after the start of the valve switching control, the CV "opening difference of 5% or more" signal 11 is ON, so AND logic 15,
The CV 29 is continuously controlled in the closing direction by the OR logic 20 and stops at 5% above the target opening. As a result, the condition of the AND logic 21 is satisfied, and the pulse generator 22 and the OR logic
From 26, MSV-BV30 is intermittently controlled in the opening direction. As a result, the generator output increases, and the generator output difference is "+ 2% or more".
The signal 12 is turned on, and the MSV-BV open control is stopped. At the same time, the condition of the AND logic 16 is satisfied, the latch logic 17 operates, and the pulse generator 19 and the OR logic 20 operate until the generator output difference “0% or more” signal 13 which is the input condition of the AND logic 18 is turned off. The CV is intermittently controlled in the closing direction. Generator output difference "0% or more" signal 13 is OFF
Then, the AND logic 23 and the OR logics 25 and 26 continuously control the MSV-BV in the fully open direction, and the valve switching control is completed. As a backup for valve switching control, when the generator output difference "-2% or more" signal 14 is turned off, A
MSV-B by ND logic 24, OR logic 25, 26
V is continuously controlled in the fully open direction to suppress further generator output drop.
【００１３】[0013]
【発明の効果】ＣＶ適正開度を求めて制御することによ
り、弁切替え制御に要する時間の短縮と、発電機出力を
監視しながらＭＳＶ−ＢＶをも制御することにより、弁
切替時に発生する発電機出力変動を最少限に抑えること
ができる。EFFECTS OF THE INVENTION By obtaining and controlling an appropriate CV opening, the time required for valve switching control can be shortened, and by controlling MSV-BV while monitoring the generator output, the power generation that occurs at valve switching can be achieved. Machine output fluctuation can be suppressed to a minimum.
【図１】本発明による弁切替回路をもったタービン起動
制御装置FIG. 1 is a turbine start-up control device having a valve switching circuit according to the present invention.
【図２】従来の弁切替回路をもったタービン制御装置FIG. 2 A turbine control device having a conventional valve switching circuit
１…タービン起動装置、２…主蒸気圧力検出器、３…主
蒸気温度検出器、４…ＣＶ開度検出器、５…発電機出力
検出器、６…弁切替信号発生部、７…ＣＶ適正開度計算
部、８…発電機出力メモリ部、９…ＣＶ開度比較部、１
０…発電機出力比較部、１１…ＣＶ“開度差５％以上”
信号、１２…発電機出力差“＋２％以上”信号、１３…
発電機出力差“０％以上”信号、１４…発電機出力差
“−２％以上”信号、１５…ＡＮＤロジック、１６…Ａ
ＮＤロジック、１７…ラッチロジック、１８…ＡＮＤロ
ジック、１９…パルス発生部、２０…ＯＲロジック、２
１…ＡＮＤロジック、２２…パルス発生部、２３…ＡＮ
Ｄロジック、２４…ＡＮＤロジック、２５…ＯＲロジッ
ク、２６…ＯＲロジック、２７…弁制御モータ、２８…
弁駆動部、２９…ＣＶ、３０…ＭＳＶ−ＢＶ、３１…Ｍ
ＳＶ前後蒸気差圧検出部（１）、３２…ＭＳＶ前後蒸気
差圧検出部（２）、３３…タイマー、３４…タイマー、
３５…高速パルス発生部、３６…ＭＳＶ（前）蒸気圧力
検出器、３７…ＭＳＶ（後）蒸気圧力検出器DESCRIPTION OF SYMBOLS 1 ... Turbine starter, 2 ... Main steam pressure detector, 3 ... Main steam temperature detector, 4 ... CV opening detector, 5 ... Generator output detector, 6 ... Valve switching signal generator, 7 ... CV proper Opening calculation section, 8 ... Generator output memory section, 9 ... CV opening comparison section, 1
0 ... Generator output comparison unit, 11 ... CV "Opening difference 5% or more"
Signal, 12 ... Generator output difference "+ 2% or more" signal, 13 ...
Generator output difference "0% or more" signal, 14 ... Generator output difference "-2% or more" signal, 15 ... AND logic, 16 ... A
ND logic, 17 ... Latch logic, 18 ... AND logic, 19 ... Pulse generator, 20 ... OR logic, 2
1 ... AND logic, 22 ... Pulse generator, 23 ... AN
D logic, 24 ... AND logic, 25 ... OR logic, 26 ... OR logic, 27 ... Valve control motor, 28 ...
Valve drive unit, 29 ... CV, 30 ... MSV-BV, 31 ... M
SV front and rear steam differential pressure detection unit (1), 32 ... MSV front and rear steam differential pressure detection unit (2), 33 ... timer, 34 ... timer,
35 ... High-speed pulse generator, 36 ... MSV (front) steam pressure detector, 37 ... MSV (rear) steam pressure detector
Claims (1)
制御弁と制御弁駆動部とこの制御弁駆動部に制御指令を
与えて蒸気流量を制御するための制御用コントローラを
もったタービン起動装置においてタービン起動後の発電
機出力増加過程でバイパスバルブからコントロールバブ
ルへ制御対象を切替える場合、コントロールバルブ適用
開度計算部とバイパスバルブの間欠開方向動作回路とコ
ントロールバルブの連続閉方向動作回路を備え、切替え
操作に要する時間を短かくするとともに切替え時の発電
機出力変動を少なくする回路を備えたとを特徴とするタ
ービン起動装置。1. A turbine starter having a control valve for controlling a steam flow rate to a steam turbine for thermal power generation, a control valve drive section, and a controller for giving a control command to the control valve drive section to control the steam flow rate. When switching the control target from the bypass valve to the control bubble in the process of increasing the generator output after starting the turbine, the control valve applicable opening calculation unit, the intermittent opening direction operation circuit of the bypass valve and the continuous closing direction operation circuit of the control valve are provided. A turbine starter comprising a circuit that shortens the time required for the switching operation and reduces fluctuations in the generator output during switching.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP706392A JPH05195713A (en) | 1992-01-20 | 1992-01-20 | Turbine starting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP706392A JPH05195713A (en) | 1992-01-20 | 1992-01-20 | Turbine starting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05195713A true JPH05195713A (en) | 1993-08-03 |
Family
ID=11655613
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP706392A Pending JPH05195713A (en) | 1992-01-20 | 1992-01-20 | Turbine starting device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05195713A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011144732A (en) * | 2010-01-13 | 2011-07-28 | Hitachi Ltd | Turbine control device |
| JP2014227915A (en) * | 2013-05-22 | 2014-12-08 | 株式会社日立製作所 | Turbine control device and turbine control method |
| CN106640222A (en) * | 2016-11-29 | 2017-05-10 | 西南石油大学 | Skid-mounted natural gas pipeline generator |
-
1992
- 1992-01-20 JP JP706392A patent/JPH05195713A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011144732A (en) * | 2010-01-13 | 2011-07-28 | Hitachi Ltd | Turbine control device |
| JP2014227915A (en) * | 2013-05-22 | 2014-12-08 | 株式会社日立製作所 | Turbine control device and turbine control method |
| CN106640222A (en) * | 2016-11-29 | 2017-05-10 | 西南石油大学 | Skid-mounted natural gas pipeline generator |
| CN106640222B (en) * | 2016-11-29 | 2018-06-01 | 西南石油大学 | A kind of skid-mounted type natural gas line generator |
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