JPH0329964B2 - - Google Patents
Info
- Publication number
- JPH0329964B2 JPH0329964B2 JP57132229A JP13222982A JPH0329964B2 JP H0329964 B2 JPH0329964 B2 JP H0329964B2 JP 57132229 A JP57132229 A JP 57132229A JP 13222982 A JP13222982 A JP 13222982A JP H0329964 B2 JPH0329964 B2 JP H0329964B2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- test
- steam
- opening
- 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.)
- Expired - Lifetime
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
- F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Turbines (AREA)
Description
【発明の詳細な説明】
本発明は蒸気タービン制御装置に係り、特に、
加減弁テスト時、負荷の低下を防止し、安定な出
力を保持するのに好適な蒸気加減弁テスト装置に
関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a steam turbine control device, and in particular,
The present invention relates to a steam control valve test device suitable for preventing a drop in load and maintaining stable output during a control valve test.
蒸気加減弁テスト装置は、弁のステイツク等に
より蒸気加減弁の負荷制御機能が損なわれること
を防止する目的で、蒸気タービンの通常運転中、
各弁毎に弁の開閉を行ない、作動をチエツクする
装置である。従来、このテストは中央操作室内の
制御盤テスト装置のボタンを順時押すことによ
り、手動で各弁毎に弁を開閉させて行なうが、テ
ストを実施することにより弁が閉じ、出力が低下
するという欠点があつた。また、一般に蒸気弁は
第１図に示すように、弁開度０から50％程度まで
は弁開度に対する出力のゲインが大きく、一方、
それ以上の開度では小さいという特性があるが、
従来、蒸気加減弁テスト装置は押ボタンによる弁
開閉機能をもつだけであるため、本来、出力特性
に影響の少ない全開から半閉までの段階で、弁の
作動を試験すれば十分であるのに、弁の過度な絞
り込みによる出力の変動が生じ易い欠点があつ
た。 The steam control valve test device is used to test the steam control valve during normal operation of the steam turbine, in order to prevent the load control function of the steam control valve from being impaired due to valve stuck, etc.
This is a device that opens and closes each valve and checks its operation. Conventionally, this test was performed by manually opening and closing each valve by pressing buttons on the control panel test equipment in the central control room in sequence, but when the test was performed, the valves closed and the output decreased. There was a drawback. In addition, as shown in Figure 1, steam valves generally have a large output gain with respect to the valve opening from 0 to about 50%;
It has the characteristic of being small at openings larger than that, but
Conventional steam control valve test equipment only has the function of opening and closing the valve with a push button, so it would have been sufficient to test the valve operation from fully open to partially closed, which has little effect on output characteristics. However, there was a drawback that output fluctuations were likely to occur due to excessive throttling of the valve.
本発明の目的は、蒸気加減弁テスト時の出力の
低下、及び弁の過度の絞り込みによる出力の変動
を防止し、安定した出力状態を維持しつつ、蒸気
加減弁の作動試験を行なうことが可能な蒸気加減
弁スト装置を提供するにある。 The purpose of the present invention is to prevent a decrease in output during a steam control valve test and to prevent output fluctuations due to excessive throttling of the valve, making it possible to perform a steam control valve operation test while maintaining a stable output state. To provide a steam control valve strike device.
本発明の要点は蒸気加減弁のテスト時、テスト
を行なう弁の閉動作による出力低下を、他の加減
弁を開けることにより補償し、また、弁テストを
全開から半閉までの弁開度まで行うことにより、
出力の安定を図るにある。 The main point of the present invention is that when testing a steam control valve, the output drop due to the closing operation of the valve being tested is compensated for by opening other control valves, and the valve test is performed from fully open to half-closed. By doing
The purpose is to stabilize the output.
以下、本発明の一実施例を第２図により設明す
る。例えば、蒸気タービンが図中Ａの点すなわ
ち、第１蒸気加減弁１７の全開で運転されていた
場合、加減弁テストのため第１蒸気加減弁１７を
全開から半閉状態（図中A′点）まで絞ることに
より生じる出力偏差（出力要求とタービン負荷の
差）はΔL1となる。従つて、このΔL1を補償する
ため、第２蒸気加減弁１８をA″まで開く。また
第２蒸気加減弁１８が部分開時（図中Ｂ点）に弁
テストを行なう場合も、出力補償は全く同一の方
法で行なわれる。（図中B′，B″点）これら一連の
出力補償操作は、ほぼ、同時に行なわれる。すな
わち、Ａ→A′に第１蒸気加減弁１７を絞り込む
操作と、第２蒸気加減弁１８を全閉→A″に開く
操作はほぼ、同時に行なわれ、出力要求とタービ
ン負荷の偏差は最少限（例えばデータサンプル間
隔により生じる時間遅れ）に保たれる。尚、弁テ
スト時、テストされる蒸気加減弁は半閉まで閉じ
ると、その位置で自動的に停止する。これは、第
１図でも示されたように、全閉状態から半閉状態
までは、弁開度に対する出力のゲインが大きく、
従つて弁テスト時の出力変動が大となること、お
よび、弁テストの目的は弁の作動の確認にあり、
半閉状態までの動作で、それは十分確認可能なこ
とによる。 An embodiment of the present invention will be explained below with reference to FIG. For example, if the steam turbine is operated at point A in the figure, that is, with the first steam control valve 17 fully open, for the control valve test, the first steam control valve 17 is changed from fully open to half-closed (point A' in the figure). ) The output deviation (difference between output demand and turbine load) caused by throttling to ΔL 1 is ΔL 1 . Therefore, in order to compensate for this ΔL 1 , the second steam regulating valve 18 is opened to A''.Also, when performing a valve test when the second steam regulating valve 18 is partially open (point B in the figure), the output compensation are performed in exactly the same manner. (Points B' and B'' in the figure) These series of output compensation operations are performed almost simultaneously. In other words, the operation of narrowing the first steam control valve 17 from A to A' and the operation of opening the second steam control valve 18 from fully closed to A'' are performed almost simultaneously, and the deviation between the output request and the turbine load is minimized. (For example, the time delay caused by the data sample interval).In addition, during the valve test, if the steam control valve to be tested is closed half-closed, it will automatically stop at that position.This is also the case in Figure 1. As shown, from the fully closed state to the partially closed state, the output gain relative to the valve opening is large;
Therefore, the output fluctuation during the valve test is large, and the purpose of the valve test is to confirm the operation of the valve.
This is because the operation up to the half-closed state can be sufficiently confirmed.
次に、本発明の制御ブロツクを第３図に示す。
任意の蒸気加減弁の試験用押ボタン１が押される
と、その時点でテストされる弁の開度が、開度検
出器５で検出され、記憶装置１６にとり込まれ
る。一方、押ボタン１の信号は弁テスト調節制御
部２に入り、テストを行なう蒸気加減弁の全スト
ロークの1/2の開度信号に変換され、開度設定器
３へ送られ、開度設定器３はそのストロークにセ
ツトされる。この設定開度は、次に比較器４へ送
られ、比較器４で弁開度検出器５からのフイード
バツク信号と比較され、その偏差が弁開度調節器
６により、弁駆動信号に変換される。この信号に
より、弁駆動装置７はテストされる蒸気加減弁８
を動かし、最終的に蒸気加減弁８は半閉位置まで
除々にしまる。一方、同時に、試験時点で全スト
ロークしていない蒸気加減弁への弁開信号が、弁
テスト調節制御装置２より、負荷複償制御部９に
送られる。この信号が負荷補償制御部９に入ると
試験時点での設定負荷信号が負荷設定器１０より
とり込まれ、出力信号として比較器１１に送られ
る。比較器１１は、電力変換器１２から現時点で
のタービン出力をとり込み、その偏差を出力調節
制御部１３に送る。その偏差信号を受けると、出
力調節制御部１３は、弁スト調節制御部２から送
られる弁開信号を弁駆動信号に変換し、弁駆動装
置１４へ送るため、全ストロークしていない蒸気
加減弁１５は除々に開く。この蒸気加減弁の開度
のフイードバツクは負荷設定とタービン出力によ
つて行なわれ、比較器１１から出力調節制御部１
３へ送られる偏差が０になると、弁テスト調節制
御部２からの弁開信号は出力調節制御部１３でブ
ロツクされ、その開度で蒸気加減弁１５は止ま
る。一方、試験が終了し、押ボタン１が試験前の
位置（押されていない状態）になると、押ボタン
１からの信号が切れ、弁テスト調節制御部２は、
記憶装置１６よりテストされた蒸気加減弁８の試
験前の開度をとり込み、開度設定器３４へ送るた
め、蒸気加減弁８は試験前の開度へ復帰する。ま
た、同時に、テスト調節制御部２からは弁テスト
時点で負荷補償を行なうため弁開信号を受けた蒸
気加減弁１５への弁閉信号が出される。この信号
及び負荷補償制御部９、負荷設定器１０、比較器
１１、電力変換器１２、出力調節制御部１３、弁
駆動部１４、蒸気加減弁５の一連の動き（但し、
蒸気加減弁５を除々に閉じることによる負荷補
償）により、弁テスト時、負荷補償を行なうため
一時的に開度を増した蒸気加減弁も、試験前の開
度に復帰する。尚、総ての蒸気加減弁が試験前の
状態に復帰すると、弁テスト調節制御器２は、次
の試験用押ボタン１が押されるまで、弁テスト調
節制御装置以降の機器への信号をブロツクするた
め、タービンは通常負荷・回転数制御により運転
される。第４図に本発明のインターロツクの一例
を示す。これは第１蒸気加減弁１７のテスト用の
インターロツクであり、まず、第１蒸気加減弁テ
ストボタン１７が押され、かつ、第２ないし第４
蒸気加減弁テストボタン１８〜２０が押されてい
ない状態の時、NOT回路２１〜２３により、信
号はAND回路２４を通過する。 Next, the control block of the present invention is shown in FIG.
When the test push button 1 of any steam control valve is pressed, the opening degree of the valve to be tested at that time is detected by the opening degree detector 5 and stored in the storage device 16. On the other hand, the signal from the push button 1 enters the valve test adjustment control section 2, is converted into an opening signal of 1/2 of the total stroke of the steam control valve to be tested, and is sent to the opening setting device 3, which sets the opening. The device 3 is set to that stroke. This set opening is then sent to the comparator 4, where it is compared with the feedback signal from the valve opening detector 5, and the deviation is converted into a valve drive signal by the valve opening controller 6. Ru. This signal causes the valve drive device 7 to control the steam control valve 8 to be tested.
Finally, the steam control valve 8 gradually closes to the half-closed position. On the other hand, at the same time, a valve opening signal for a steam control valve that has not reached its full stroke at the time of the test is sent from the valve test adjustment control device 2 to the load compensation control section 9. When this signal enters the load compensation control section 9, the set load signal at the time of the test is taken in from the load setter 10 and sent to the comparator 11 as an output signal. The comparator 11 takes in the current turbine output from the power converter 12 and sends the deviation to the output adjustment control section 13 . Upon receiving the deviation signal, the output adjustment control section 13 converts the valve opening signal sent from the valve stroke adjustment control section 2 into a valve drive signal and sends it to the valve drive device 14. 15 gradually opens. Feedback of the opening degree of the steam control valve is performed based on the load setting and the turbine output, and is fed back from the comparator 11 to the output control control section 1.
3 becomes 0, the valve opening signal from the valve test adjustment control section 2 is blocked by the output adjustment control section 13, and the steam control valve 15 stops at that opening degree. On the other hand, when the test is completed and the push button 1 returns to its pre-test position (not pressed), the signal from the push button 1 is cut off, and the valve test adjustment control section 2
The pre-test opening degree of the steam regulating valve 8 is retrieved from the storage device 16 and sent to the opening setting device 34, so that the steam regulating valve 8 returns to the opening degree before the test. At the same time, the test adjustment control section 2 issues a valve close signal to the steam control valve 15 which has received the valve open signal in order to perform load compensation at the time of the valve test. This signal and a series of movements of the load compensation control section 9, load setter 10, comparator 11, power converter 12, output adjustment control section 13, valve drive section 14, and steam control valve 5 (however,
(Load compensation by gradually closing the steam control valve 5) During the valve test, the steam control valve, whose opening degree has been temporarily increased for load compensation, also returns to the opening degree before the test. When all the steam control valves return to their pre-test state, the valve test adjustment controller 2 blocks signals to devices subsequent to the valve test adjustment controller until the next test pushbutton 1 is pressed. Therefore, the turbine is normally operated by load/rotation speed control. FIG. 4 shows an example of the interlock of the present invention. This is an interlock for testing the first steam regulating valve 17. First, the first steam regulating valve test button 17 is pressed, and the second to fourth
When the steam control valve test buttons 18-20 are not pressed, the NOT circuits 21-23 cause the signal to pass through the AND circuit 24.
また、蒸気加減弁開度検出回路２５により、第
１蒸気加減弁が半閉以上の開度を保持している場
合のみ、AND回路２６により、この信号は蒸気
加減弁作動回路２７に入り、半閉の位置まで第１
蒸気加減弁を絞り込む。一方、第１蒸気加減弁の
テストボタン１７を離すと、信号はNOT回路２
８によつてAND回路２９を通り、加減弁通常制
御回路３０によりテスト前の通常制御状態に復帰
する。 Further, only when the first steam regulating valve is maintained at an opening degree of half-closed or more by the steam regulating valve opening detection circuit 25, this signal is sent to the steam regulating valve operating circuit 27 by the AND circuit 26, and the signal is sent to the steam regulating valve operating circuit 27, 1st to the closed position
Refine the steam control valve. On the other hand, when the test button 17 of the first steam control valve is released, the signal changes to the NOT circuit 2.
8, the signal passes through the AND circuit 29 and is returned to the normal control state before the test by the regulating valve normal control circuit 30.
本発明によれば弁テスト時にテストされる蒸気
加減弁が絞られることによる出力の低下及び半閉
以下に絞り込まれることによる出力の変動を自動
的に防止することができる。 According to the present invention, it is possible to automatically prevent a decrease in output due to the steam regulating valve being tested during a valve test being throttled, and a fluctuation in output due to the steam regulating valve being throttled to less than half-closed.
第１図は一般的な蒸気弁に於ける弁開度と出力
の関係図、第２図は負荷補償した場合の本発明の
各弁の弁開度、出力特性図、第３図は本発明の制
御ブロツク図、第４図は本発明の蒸気加減弁テス
ト装置のインターロツク図である。
２５……蒸気加減弁開度検出回路、２７……蒸
気加減弁作動回路、３０……加減弁通常制御回
路。
Fig. 1 is a diagram showing the relationship between valve opening and output in a general steam valve, Fig. 2 is a diagram showing the valve opening and output characteristics of each valve of the present invention when load compensation is performed, and Fig. 3 is a diagram of the valve opening and output characteristics of the present invention when load compensation is performed. FIG. 4 is an interlock diagram of the steam control valve test device of the present invention. 25...Steam moderation valve opening detection circuit, 27...Steam moderation valve operation circuit, 30...Steam moderation valve normal control circuit.
Claims (1)
対して、テスト期間中その開度が半閉状態になる
ように設定する設定手段、 該設定手段により設定された開度までこの蒸気
加減弁の開度を絞り込む操作手段、 テストの目的で選択されなかつた他の蒸気加減
弁に対して、テスト期間中その開度が、前記蒸気
加減弁の半閉状態にしたことに伴うタービンの出
力低下分を償う開度となるよう設定する設定手
段、 該設定手段により設定された開度まで前記選択
されなかつた蒸気加減弁の開度を操作する操作手
段、 とから構成される蒸気加減弁テスト装置。[Claims] 1. A test device for a plurality of steam control valves, which sets the opening degree of one steam control valve selected for the purpose of the test to be in a semi-closed state during the test period. a setting means for reducing the opening of this steam control valve to the opening set by the setting means; and an operating means for reducing the opening of this steam control valve to the opening set by the setting means; , a setting means for setting the opening degree to compensate for the decrease in output of the turbine due to the half-closed state of the steam control valve; A steam control valve test device comprising: an operating means for controlling the opening degree;
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13222982A JPS5923003A (en) | 1982-07-30 | 1982-07-30 | Steam control valve test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13222982A JPS5923003A (en) | 1982-07-30 | 1982-07-30 | Steam control valve test device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5923003A JPS5923003A (en) | 1984-02-06 |
| JPH0329964B2 true JPH0329964B2 (en) | 1991-04-25 |
Family
ID=15076391
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13222982A Granted JPS5923003A (en) | 1982-07-30 | 1982-07-30 | Steam control valve test device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5923003A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59221407A (en) * | 1983-05-31 | 1984-12-13 | Toshiba Corp | Diagnosing device for abnormality of adjusting valve in power plant |
| JP2960066B2 (en) * | 1988-09-09 | 1999-10-06 | 株式会社東芝 | Steam turbine controller |
| US7134834B2 (en) * | 2004-09-30 | 2006-11-14 | General Electric Company | Flow compensation for turbine control valve test |
| DE102006030108A1 (en) * | 2006-06-28 | 2008-01-03 | Man Turbo Ag | Apparatus and method for performing a valve test on a turbomachine |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50107303A (en) * | 1974-02-01 | 1975-08-23 | ||
| JPS5813725B2 (en) * | 1975-12-22 | 1983-03-15 | 株式会社日立製作所 | Turbine hinges |
| JPS5624764A (en) * | 1979-08-08 | 1981-03-09 | Hitachi Ltd | Negative plate for fuel cell |
-
1982
- 1982-07-30 JP JP13222982A patent/JPS5923003A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5923003A (en) | 1984-02-06 |
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