JPH0361002B2 - - Google Patents
Info
- Publication number
- JPH0361002B2 JPH0361002B2 JP57056572A JP5657282A JPH0361002B2 JP H0361002 B2 JPH0361002 B2 JP H0361002B2 JP 57056572 A JP57056572 A JP 57056572A JP 5657282 A JP5657282 A JP 5657282A JP H0361002 B2 JPH0361002 B2 JP H0361002B2
- Authority
- JP
- Japan
- Prior art keywords
- valve opening
- signal
- detection
- steam valve
- command signal
- 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
- 238000001514 detection method Methods 0.000 claims description 60
- 238000007493 shaping process Methods 0.000 description 15
- 230000007246 mechanism Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 230000008878 coupling Effects 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 5
- 238000005859 coupling reaction Methods 0.000 description 5
- 230000007423 decrease Effects 0.000 description 3
- 230000007257 malfunction Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
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
- F01D17/00—Regulating or controlling by varying flow
- F01D17/02—Arrangement of sensing elements
- F01D17/06—Arrangement of sensing elements responsive to speed
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Turbines (AREA)
- Control Of Velocity Or Acceleration (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、蒸気タービン等の原動機に用いられ
て好適な電子油圧式調速装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electro-hydraulic speed governor suitable for use in a prime mover such as a steam turbine.
〔従来の技術〕
第１図は従来の電子油圧式調速装置を示す回路
図である。[Prior Art] FIG. 1 is a circuit diagram showing a conventional electro-hydraulic speed governor.
原子力発電所または火力発電所用蒸気タービン
１の蒸気弁３は、連結棒４が組み合わされた連結
機構５を介してサーボモータ７に連結されてい
る。このサーボモータ７はシリンダ９とピストン
１１とから構成され、シリンダ９にはダンプ弁１
２が配設されてシリンダ９内の油を流出可能とす
る。 A steam valve 3 of a steam turbine 1 for a nuclear power plant or a thermal power plant is connected to a servo motor 7 via a connecting mechanism 5 to which a connecting rod 4 is combined. This servo motor 7 is composed of a cylinder 9 and a piston 11, and the cylinder 9 has a dump valve 1.
2 is provided to allow the oil in the cylinder 9 to flow out.
サーボモータ７は管を介して電油変換器１３に
連結され、この電油変換器１３は加算器１５を介
して低値選択回路１６に接続されている。すなわ
ち、電油変換器１３は、低値選択回路１６からの
蒸気弁開度指令信号Ａに応じた油をサーボモータ
７に供給している。また、サーボモータ７には、
ピストン１１の移動量を検出して蒸気弁３の開度
を検出する蒸気弁開度検出器１７が配設されてい
る。この蒸気弁開度検出器１７は、検出信号整形
回路１９等を介して加算器１５に接続され、蒸気
弁開度検出器１７からの蒸気弁開度検出信号Ｂを
フイードバツクさせている。 The servo motor 7 is connected via a tube to an electro-hydraulic converter 13 which is connected via an adder 15 to a low value selection circuit 16 . That is, the electro-hydraulic converter 13 supplies oil to the servo motor 7 according to the steam valve opening command signal A from the low value selection circuit 16. In addition, the servo motor 7 has
A steam valve opening detector 17 that detects the amount of movement of the piston 11 to detect the opening of the steam valve 3 is provided. This steam valve opening degree detector 17 is connected to the adder 15 via a detection signal shaping circuit 19 etc., and feeds back the steam valve opening degree detection signal B from the steam valve opening degree detector 17.
前記低値選択回路１６と加算器１５との中間点
および加算器１５と検出信号整形回路１９との中
間点には開度信号診断回路２１が接続され、蒸気
弁開度検出信号Ｂが一定時間の後においてもなお
蒸気弁開度指令信号Ａと一致しない場合に、操作
者に警告信号を発信可能としている。 An opening signal diagnosis circuit 21 is connected to an intermediate point between the low value selection circuit 16 and the adder 15 and an intermediate point between the adder 15 and the detection signal shaping circuit 19, and the steam valve opening detection signal B is output for a certain period of time. If the steam valve opening degree command signal A still does not match even after this, a warning signal can be sent to the operator.
したがつて、蒸気弁開度検出信号Ｂが蒸気弁開
度指令信号Ａと一致する場合には、電油変換器１
３の作動が停止し、蒸気弁３の開閉動作が停止す
る。一方、蒸気弁３、サーボモータ７、電油変換
器１３および蒸気弁開度検出器１７等の故障によ
り前記両信号Ａ，Ｂが一致しない場合には、電油
変換器１３が作動し続け、蒸気弁３の開閉動作が
継続するので、前記警報を受けた操作者は、蒸気
タービン１の異常回転を防止するために、ダンプ
弁１２を開いて蒸気弁３を閉じる。 Therefore, when the steam valve opening degree detection signal B matches the steam valve opening degree command signal A, the electro-hydraulic converter 1
3 stops, and the opening/closing operation of the steam valve 3 stops. On the other hand, if the two signals A and B do not match due to a failure in the steam valve 3, servo motor 7, electro-hydraulic converter 13, steam valve opening detector 17, etc., the electro-hydraulic converter 13 continues to operate, Since the opening/closing operation of the steam valve 3 continues, the operator who receives the warning opens the dump valve 12 and closes the steam valve 3 in order to prevent the steam turbine 1 from rotating abnormally.
ところが、蒸気弁３およびサーボモータ７等の
故障に対しては、危険を防止するために蒸気ター
ビン１を急停止するのはやむをえないものの、蒸
気弁開度検出器１７および検出信号整形回路１９
等の補機部品の故障に対して蒸気タービン１を急
停止するのは極めてロスが大きい。すなわち、こ
の蒸気タービン１の急停止によつて、電力系統に
急激な擾乱を与えて電力供給のサービス性を低下
させるとともに、ボイラに蓄積された熱エネルギ
を放出させてしまうことになる。
However, in the event of a failure in the steam valve 3, servo motor 7, etc., it is unavoidable to suddenly stop the steam turbine 1 to prevent danger;
Sudden stopping of the steam turbine 1 in response to a failure of an auxiliary component such as the above causes an extremely large loss. That is, this sudden stop of the steam turbine 1 causes a sudden disturbance to the electric power system, deteriorating the serviceability of electric power supply, and also causes the thermal energy accumulated in the boiler to be released.
本発明は、上記従来の問題点に鑑みなされたも
のであつて、蒸気タービンの運転の信頼性を向上
させるとともに、系のエネルギ効率を向上させる
ことができる電子油圧式調速装置を提供すること
を目的とする。 The present invention has been made in view of the above conventional problems, and provides an electro-hydraulic speed governor that can improve the reliability of steam turbine operation and improve the energy efficiency of the system. With the goal.
上記目的を達成するために、本発明は、弁開度
指令信号を出力する指令信号出力手段と、前記弁
開度指令信号に基づいて弁を駆動する駆動手段
と、前記弁の開度を検出し弁開度検出信号を出力
する検出手段と、前記指令信号出力手段からの弁
開度指令信号と前記検出手段からの弁開度検出信
号とを取り込んで、弁開度検出信号が弁開度指令
信号に一致するよう前記駆動手段を制御する制御
手段と、を備えた電子油圧式調速装置において、
前記駆動手段と検出手段の特性を伝達関数によ
つて模擬することにより弁開度信号を出力する動
特性モデルと、前記検出手段からの弁開度検出信
号と前記動特性モデルからの弁開度信号とを比較
し、前記両信号の差が所定値を超えたときは、前
記検出手段からの弁開度検出信号の代わりに、前
記動特性モデルからの弁開度信号を前記制御手段
へ伝達する診断回路と、を備えたものである。
In order to achieve the above object, the present invention provides a command signal output means for outputting a valve opening command signal, a driving means for driving a valve based on the valve opening command signal, and a drive means for detecting the opening of the valve. A detection means outputs a valve opening detection signal, and a valve opening command signal from the command signal output means and a valve opening detection signal from the detection means are taken in, and the valve opening detection signal is determined as the valve opening. An electro-hydraulic speed governor, comprising: a control means for controlling the drive means to match a command signal; The dynamic characteristic model to be output is compared with the valve opening detection signal from the detection means and the valve opening signal from the dynamic characteristic model, and when the difference between the two signals exceeds a predetermined value, the detection means and a diagnostic circuit that transmits a valve opening signal from the dynamic characteristic model to the control means instead of the valve opening detection signal from the dynamic characteristic model.
上記構成によれば、通常の場合は、指令信号出
力手段からの弁開度指令信号と検出手段からの弁
開度検出信号が制御手段に取り込まれ、弁開度検
出信号が弁開度指令信号に一致するように駆動手
段が制御される。
According to the above configuration, normally, the valve opening command signal from the command signal output means and the valve opening detection signal from the detection means are taken into the control means, and the valve opening detection signal is used as the valve opening command signal. The drive means is controlled so as to match the .
また、検出手段が故障した場合は、検出手段か
らの弁開度検出信号と動特性モデルからの弁開度
信号との差が大きくなり、その差が所定値を超え
たときに、診断回路が作動して、検出手段からの
弁開度検出信号に代わつて動特性モデルからの弁
開度信号が制御手段へ伝達される。そして、制御
手段では、動特性モデルからの弁開度信号と指令
信号出力手段からの弁開度指令信号に基づいて、
駆動手段を制御する。これにより、検出手段に故
障が発生しても弁を正常状態に維持することがで
き、原動機の運転を続行させることが可能とな
る。 In addition, if the detection means fails, the difference between the valve opening detection signal from the detection means and the valve opening signal from the dynamic characteristic model increases, and when the difference exceeds a predetermined value, the diagnostic circuit When activated, a valve opening signal from the dynamic characteristic model is transmitted to the control means in place of the valve opening detection signal from the detection means. Then, in the control means, based on the valve opening degree signal from the dynamic characteristic model and the valve opening degree command signal from the command signal output means,
Control the drive means. Thereby, even if a failure occurs in the detection means, the valve can be maintained in a normal state, and the operation of the prime mover can be continued.
以下、本発明の実施例を図面に参照して説明す
る。
Embodiments of the present invention will be described below with reference to the drawings.
第３図は、本発明に係る電子油圧式調速装置の
一実施例を示す回路図であり、従来例と同様な部
分は同一の符号を付すことにより説明を省略す
る。 FIG. 3 is a circuit diagram showing an embodiment of the electro-hydraulic speed governor according to the present invention, and the same parts as those in the conventional example are given the same reference numerals and the explanation thereof will be omitted.
電油変換器１３、サーボモータ７、連結機構
５、蒸気弁開度検出回路（蒸気弁開度検出器１７
および検出信号整形回路１９等の総称。以下同
じ。）の動特性モデルは第２図のブロツク線図に
よつて示される。すなわち、電油変換器１３、サ
ーボモータ７、連結機構５のそれぞれの動特性１
３Ａ，７Ａ，５Ａは直列に接続され、また蒸気弁
開度検出回路の動特性１７Ａは、電油変換器およ
びサーボモータの動特性１３Ａ，７Ａと並列に接
続されている。 Electro-hydraulic converter 13, servo motor 7, connection mechanism 5, steam valve opening detection circuit (steam valve opening detector 17
and the detection signal shaping circuit 19, etc. same as below. ) is shown by the block diagram in FIG. That is, the dynamic characteristics 1 of each of the electro-hydraulic converter 13, the servo motor 7, and the coupling mechanism 5
3A, 7A, and 5A are connected in series, and the dynamic characteristic 17A of the steam valve opening detection circuit is connected in parallel with the dynamic characteristic 13A, 7A of the electro-hydraulic converter and the servo motor.
動特性モデル２２の入力側、即ち電油変換器の
動特性１３Ａの入力端は加算器１５と電油変換器
１３との中間点に接続され、また動特性モデル２
２の出力側、即ち蒸気弁開度検出回路の動特性１
７Ａの出力端は、加算器２０を介して診断回路２
１に接続されている。更に、蒸気弁開度検出回路
の動特性１７Ａの出力端は、スイツチS2を介して
加算器１５に接続され、このスイツチS2は診断路
２１に接続されて、この診断回路２１により開閉
可能とされる。 The input side of the dynamic characteristic model 22, that is, the input terminal of the dynamic characteristic 13A of the electro-hydraulic converter is connected to the midpoint between the adder 15 and the electro-hydraulic converter 13, and the dynamic characteristic model 2
Dynamic characteristics 1 of the output side of 2, that is, the steam valve opening detection circuit
The output terminal of 7A is connected to the diagnostic circuit 2 via the adder 20.
Connected to 1. Further, the output terminal of the dynamic characteristic 17A of the steam valve opening detection circuit is connected to the adder 15 via a switch S2 , and this switch S2 is connected to a diagnostic path 21, and can be opened and closed by this diagnostic circuit 21. It is said that
一方、加算器１５と検出信号整形回路１９との
間にはスイツチS1が配設され、このスイツチS1は
スイツチS2と同様に診断回路２１に接続され、こ
の診断回路２１により開閉可能とされる。また、
スイツチS1と検出信号整形回路１９との中間点は
加算器２０を介して診断回路２１に接続されてい
る。 On the other hand, a switch S 1 is disposed between the adder 15 and the detection signal shaping circuit 19, and like the switch S 2 , this switch S 1 is connected to a diagnostic circuit 21, and can be opened and closed by this diagnostic circuit 21. be done. Also,
An intermediate point between the switch S 1 and the detection signal shaping circuit 19 is connected to a diagnostic circuit 21 via an adder 20 .
上記診断回路２１は、検出信号整形回路１９お
よび蒸気弁開度検出回路の動特性１７Ａからの信
号を比較し、両者の差が小さいときにはスイツチ
S1を閉じ、スイツチS2を開く。一方両者の差が大
きいときには、蒸気弁開度検出回路側に故障があ
るものと診断して、スイツチS1を開きスイツチS2
を閉じ、動特性モデル２２側の出力のみを加算器
１５にフイードバツクさせるとともに、操作者に
故障である旨を告知するアラーム信号を送る。 The diagnostic circuit 21 compares the signals from the detection signal shaping circuit 19 and the dynamic characteristic 17A of the steam valve opening detection circuit, and when the difference between the two is small, the switch is activated.
Close S 1 and open switch S 2 . On the other hand, if the difference between the two is large, it is diagnosed that there is a failure in the steam valve opening detection circuit, and switch S1 is opened and switch S2 is opened.
is closed, and only the output from the dynamic characteristic model 22 side is fed back to the adder 15, and an alarm signal is sent to the operator to notify that there is a failure.
本実施例での第特性モーデルは、原動機への作
動流量を制御する制御手段の各要素を伝達関数に
よつて模擬したものである。すなわち、１次遅れ
特性をなす電油変換器１３は動特性１３Ａで、比
例積分特性をなすサーボモータ７は動特性７Ａ
で、比例特性をなす連結機構５は動特性５Ａでそ
れぞれ模擬している。また、この制御手段のフイ
ードバツク系を構成する蒸気弁開度検出器７及び
検出信号整形回路１９は、ゲインＡ３のフイード
バツクループとして動特性１７Ａで模擬してい
る。したがつて、低値選択回路１６−加算器１５
−電油変換器１３−サーボモータ７−連結機構５
−蒸気弁開度検出器１７−検出信号整形回路１９
−スイツチS1−加算器１５の実制御系は、低値選
択回路１６−加算器１５−動特性１３Ａ−動特性
７Ａ−動特性１７Ａ−スイツチS2−加算器１５の
ブロツク線図で模擬され、全体としては２次遅れ
要素を示している。 The first characteristic model in this embodiment simulates each element of the control means for controlling the operating flow rate to the prime mover using a transfer function. That is, the electro-hydraulic converter 13 having a first-order lag characteristic has a dynamic characteristic of 13A, and the servo motor 7 having a proportional-integral characteristic has a dynamic characteristic of 7A.
The coupling mechanism 5 having a proportional characteristic is simulated with a dynamic characteristic 5A. Further, the steam valve opening degree detector 7 and the detection signal shaping circuit 19, which constitute the feedback system of this control means, are simulated by the dynamic characteristic 17A as a feedback loop with a gain of A3. Therefore, low value selection circuit 16-adder 15
- Electro-hydraulic converter 13 - Servo motor 7 - Connection mechanism 5
- Steam valve opening degree detector 17 - Detection signal shaping circuit 19
- Switch S 1 - The actual control system of adder 15 is simulated by the block diagram of low value selection circuit 16 - adder 15 - dynamic characteristic 13A - dynamic characteristic 7A - dynamic characteristic 17A - switch S 2 - adder 15. , as a whole represents a second-order lag element.
そして、正常時はスイツチS1が閉じてスイツチ
S2が開くから制御は実制御系のみで行われ、模擬
系は診断回路２１における参照信号（正常時の実
制御系の開度検出信号Ｂと同じ）を演算提供して
いる。この診断回路２１が蒸気弁開度検出回路の
異常を検知したときは、スイツチS1が開きスイツ
チS2が閉じるから実制御系は切り離され、蒸気弁
開度指令信号Ａと模擬制御系の動特性モデルから
の出力信号Ｂとの偏差によつて前記電油交換器１
３の制御を行うことになる。 During normal operation, switch S1 closes and the switch is turned off.
Since S2 is open, control is performed only by the actual control system, and the simulation system calculates and provides a reference signal for the diagnostic circuit 21 (same as the opening detection signal B of the actual control system during normal operation). When this diagnostic circuit 21 detects an abnormality in the steam valve opening detection circuit, switch S1 opens and switch S2 closes, so the actual control system is disconnected and the steam valve opening command signal A and the simulated control system are activated. The electric oil exchanger 1 is determined by the deviation from the output signal B from the characteristic model.
3 control will be performed.
なお、本実施例では、低値選択回路１６は指令
信号出力手段を、電油交換器１３、サーボモータ
７および連結機構５は駆動手段を、蒸気弁開度検
出器１７および検出信号整形回路１９は検出手段
を、加算器１５は制御手段をそれぞれ構成してい
る。 In this embodiment, the low value selection circuit 16 serves as a command signal output means, the electric oil exchanger 13, the servo motor 7 and the coupling mechanism 5 serve as a drive means, and the steam valve opening degree detector 17 and the detection signal shaping circuit 19 serve as a drive means. constitutes a detection means, and the adder 15 constitutes a control means, respectively.
次に作用を説明する。 Next, the action will be explained.
低値選択回路１６からの蒸気弁開度指令信号Ａ
は電油変換器１３および電油変換器の動特性１３
Ａに入力され、また検出信号整形回路１９および
蒸気弁開度検出回路の動特性１７Ａからの出力信
号は加算器２０を介して診断回路２１に入力され
る。この診断回路２１によりS1が閉じS2が開いた
場合には、検出信号整形回路１９からの信号が加
算器に入力され、この信号と蒸気弁開度指令信号
Ａとの差が電油変換器１３に入力されて、蒸気タ
ービン１は通常の運転が行なわれる。また、S1が
開きS2が閉じた場合には、加算器１５へフイード
バツクされる蒸気弁開度検出回路の動特性１７Ａ
からの信号と蒸気弁開度指令信号Ａとの差が電油
変換器１３に入力され、蒸気タービン１は動特性
モデル２２に基づく制御運転が行なわれる。すな
わち、電油交換器１３は、動特性１７Ａからの信
号が蒸気弁開度指令信号Ａに追従するまでサーボ
モータ７を駆動して、蒸気弁３の開度を蒸気弁開
度指令信号Ａによつて制御可能としている。 Steam valve opening command signal A from low value selection circuit 16
is the electro-hydraulic converter 13 and the dynamic characteristics of the electro-hydraulic converter 13
A, and output signals from the detection signal shaping circuit 19 and the dynamic characteristics 17A of the steam valve opening detection circuit are input to the diagnostic circuit 21 via the adder 20. When S 1 is closed and S 2 is opened by this diagnostic circuit 21, the signal from the detection signal shaping circuit 19 is input to the adder, and the difference between this signal and the steam valve opening command signal A is converted into an electro-hydraulic converter. 13, and the steam turbine 1 is operated normally. In addition, when S 1 opens and S 2 closes, the dynamic characteristic 17A of the steam valve opening detection circuit is fed back to the adder 15.
The difference between the signal from the steam valve opening command signal A and the steam valve opening command signal A is input to the electro-hydraulic converter 13, and the steam turbine 1 is operated under control based on the dynamic characteristic model 22. That is, the electric oil exchanger 13 drives the servo motor 7 until the signal from the dynamic characteristic 17A follows the steam valve opening command signal A, and changes the opening of the steam valve 3 to the steam valve opening command signal A. This makes it possible to control it.
一方、この動特性モデル２２に基づく蒸気ター
ビン１の制御運転下で、アラーム信号を受けた操
作者は、手動操作により蒸気弁開度指令信号Ａの
値を徐々に低減させ、電油変換器１３からの油量
を減少させて蒸気弁３を徐々に閉じ、蒸気タービ
ン１を緩停止させる。ところが、この操作者によ
る操作によつても、蒸気タービン１の蒸気流量が
変化しない場合には、蒸気弁開度検出器１７また
は検出信号整形回路１９の故障ではなく、蒸気弁
３、サーボモータ７または電油変換器１３の故障
であると判断できる。すなわち、操作者が蒸気弁
開度指令信号Ａを低減させ蒸気弁３を閉じると、
蒸気タービン１への蒸気流量が減少する。この場
合、蒸気弁３の開度は蒸気弁開度検出器１７と検
出信号整形回路１９によつて検出され、動特性モ
デル２２の出力と一致しているはずであるが、蒸
気弁３、サーボモータ７または電油変換器１３が
故障していると、蒸気弁３の開度が動特性モデル
２２の出力と不一致となる。したがつて、蒸気弁
３が正常に閉となつて蒸気タービン１の蒸気流量
が減少すれば、蒸気弁開度検出器１７または検出
信号整形回路１９の故障と判断でき、蒸気弁３が
閉とならず蒸気タービン１の蒸気流量が変化しな
ければ、蒸気弁３、サーボモータ７または電油変
換器１３の故障と判断できる。そして、蒸気弁
３、サーボモータ７または電油変換器１３の故障
と判断したときは、ダンプ弁１２を開くことによ
り蒸気タービン１を急停止させることになる。 On the other hand, under the controlled operation of the steam turbine 1 based on the dynamic characteristic model 22, the operator who receives the alarm signal gradually reduces the value of the steam valve opening command signal A by manual operation, and the electro-hydraulic converter 13 The steam valve 3 is gradually closed by decreasing the amount of oil from the steam turbine 1, and the steam turbine 1 is brought to a slow stop. However, if the steam flow rate of the steam turbine 1 does not change even with this operation by the operator, it is not a malfunction of the steam valve opening degree detector 17 or the detection signal shaping circuit 19, but a malfunction of the steam valve 3 or the servo motor 7. Alternatively, it can be determined that the electro-hydraulic converter 13 is malfunctioning. That is, when the operator reduces the steam valve opening command signal A and closes the steam valve 3,
The steam flow rate to the steam turbine 1 decreases. In this case, the opening degree of the steam valve 3 is detected by the steam valve opening degree detector 17 and the detection signal shaping circuit 19, and should match the output of the dynamic characteristic model 22. If the motor 7 or the electro-hydraulic converter 13 is out of order, the opening degree of the steam valve 3 will be inconsistent with the output of the dynamic characteristic model 22. Therefore, if the steam valve 3 is normally closed and the steam flow rate of the steam turbine 1 is reduced, it can be determined that the steam valve opening degree detector 17 or the detection signal shaping circuit 19 has failed, and the steam valve 3 is closed. If the steam flow rate of the steam turbine 1 does not change, it can be determined that the steam valve 3, the servo motor 7, or the electro-hydraulic converter 13 has failed. When it is determined that the steam valve 3, the servo motor 7, or the electro-hydraulic converter 13 has failed, the dump valve 12 is opened to bring the steam turbine 1 to a sudden stop.
したがつて、本実施例によれば、操作員によつ
て、蒸気タービン１を緩停止させることができる
ことから、蒸気タービン１の運転の信頼性を向上
させて良質の電力を供給できるとともに、ボイラ
に蓄積された熱の放出を防止して系のエネルギ効
率を向上させることができる。ここで1000MW級
の蒸気タービンの急停止を防止できる場合には、
燃料価格に換算して1000万円程度のエネルギ放出
を阻止できる。 Therefore, according to this embodiment, since the steam turbine 1 can be brought to a slow stop by the operator, the operational reliability of the steam turbine 1 can be improved and high-quality power can be supplied, and the boiler The energy efficiency of the system can be improved by preventing the release of heat accumulated in the system. If it is possible to prevent a sudden stop of a 1000 MW class steam turbine,
This can prevent energy emissions of about 10 million yen in terms of fuel prices.
また、蒸気弁３の開度が減少すると蒸気流量も
減少するという関係があるため、蒸気弁開度検出
器１７または検出信号整形回路１９が不良で蒸気
弁３の開度を監視することができない場合、蒸気
弁開度指令信号Ａと蒸気流量の変化を監視するこ
とにより、後者が前者に追従していれば電油変換
器１３、サーボモータ７および連結機構５は正常
であり、追従していなければ電油変換器１３、サ
ーボモータ７および連結機構５のいずれかが故障
していると判断できる。 Furthermore, since there is a relationship in which the steam flow rate also decreases when the opening degree of the steam valve 3 decreases, the opening degree of the steam valve 3 cannot be monitored due to a malfunction of the steam valve opening degree detector 17 or the detection signal shaping circuit 19. In this case, by monitoring the changes in the steam valve opening command signal A and the steam flow rate, if the latter follows the former, the electro-hydraulic converter 13, servo motor 7 and coupling mechanism 5 are normal and are not following. If not, it can be determined that one of the electro-hydraulic converter 13, servo motor 7, and coupling mechanism 5 is malfunctioning.
以上説明したように、本発明によれば、弁の開
度を検出する検出手段の故障時に、動特性モデル
による制御運転を続行しつつ、故障の原因調査お
よび修復等ができるため、運転ロスが少なくな
り、系のエネルギ効率を向上させることができ
る。しかも、動特性モデルによる制御運転である
から、検出手段の故障がどんなものであつても、
その故障に容易に対拠することが可能である。
As explained above, according to the present invention, when the detection means for detecting the valve opening fails, the cause of the failure can be investigated and repaired while continuing control operation based on the dynamic characteristic model, thereby reducing operational loss. The energy efficiency of the system can be improved. Moreover, since the operation is controlled by a dynamic characteristic model, no matter what kind of failure occurs in the detection means,
It is possible to easily counteract the failure.
また、蒸気タービン等の原動機を急停止させて
しまう事態が回避され、蒸気タービン等の運転の
信頼性を向上させることができる。 Moreover, a situation where a prime mover such as a steam turbine is suddenly stopped can be avoided, and the reliability of operation of a steam turbine or the like can be improved.
第１図は従来の電子油圧式調速装置を示す回路
図、第２図は同装置の制御手段の動特性モデルを
示すブロツク線図、第３図は本発明に係る電子油
圧式調速装置の一実施例を示す回路図である。
１……蒸気タービン、３……蒸気弁、７……サ
ーボモータ、１３……電油変換器、１７……蒸気
弁開度検出器、Ａ……蒸気弁開度指令信号、２１
……診断回路、２２……動特性モデル。
Fig. 1 is a circuit diagram showing a conventional electro-hydraulic speed governor, Fig. 2 is a block diagram showing a dynamic characteristic model of the control means of the same device, and Fig. 3 is an electro-hydraulic speed governor according to the present invention. FIG. 2 is a circuit diagram showing one embodiment of the present invention. 1...Steam turbine, 3...Steam valve, 7...Servo motor, 13...Electro-hydraulic converter, 17...Steam valve opening detector, A...Steam valve opening command signal, 21
...Diagnostic circuit, 22...Dynamic characteristic model.
Claims (1)
と、前記弁開度指令信号に基づいて弁を駆動する
駆動手段と、前記弁の開度を検出し弁開度検出信
号を出力する検出手段と、前記指令信号出力手段
からの弁開度指令信号と前記検出手段からの弁開
度検出信号とを取り込んで、弁開度検出信号が弁
開度指令信号に一致するよう前記駆動手段を制御
する制御手段と、を備えた電子油圧式調速装置に
おいて、 前記駆動手段と検出手段の特性を伝達関数によ
つて模擬することにより弁開度信号を出力する動
特性モデルと、前記検出手段からの弁開度検出信
号と前記動特性モデルからの弁開度信号とを比較
し、前記両信号の差が所定値を超えたときは、前
記検出手段からの弁開度検出信号の代わりに、前
記動特性モデルからの弁開度信号を前記制御手段
へ伝達する診断回路と、を備えたことを特徴とす
る電子油圧式調速装置。[Scope of Claims] 1. Command signal output means for outputting a valve opening command signal, driving means for driving a valve based on the valve opening command signal, and valve opening detection means for detecting the opening of the valve. A detection means for outputting a signal, a valve opening command signal from the command signal output means and a valve opening detection signal from the detection means are taken in, and the valve opening detection signal matches the valve opening command signal. and a control means for controlling the drive means, the dynamic characteristics model outputting a valve opening signal by simulating the characteristics of the drive means and the detection means using a transfer function. The valve opening detection signal from the detection means is compared with the valve opening signal from the dynamic characteristic model, and if the difference between the two signals exceeds a predetermined value, the valve opening detection signal from the detection means is compared. An electro-hydraulic speed governor comprising: a diagnostic circuit that transmits a valve opening signal from the dynamic characteristic model to the control means instead of a detection signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5657282A JPS58174107A (en) | 1982-04-07 | 1982-04-07 | Electron-hydraulic type speed controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5657282A JPS58174107A (en) | 1982-04-07 | 1982-04-07 | Electron-hydraulic type speed controller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58174107A JPS58174107A (en) | 1983-10-13 |
| JPH0361002B2 true JPH0361002B2 (en) | 1991-09-18 |
Family
ID=13030854
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5657282A Granted JPS58174107A (en) | 1982-04-07 | 1982-04-07 | Electron-hydraulic type speed controller |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58174107A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4997103A (en) * | 1973-01-26 | 1974-09-13 | ||
| JPS566902B2 (en) * | 1973-08-16 | 1981-02-14 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5916485Y2 (en) * | 1979-06-27 | 1984-05-15 | 石川島播磨重工業株式会社 | Turbine control device |
-
1982
- 1982-04-07 JP JP5657282A patent/JPS58174107A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4997103A (en) * | 1973-01-26 | 1974-09-13 | ||
| JPS566902B2 (en) * | 1973-08-16 | 1981-02-14 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58174107A (en) | 1983-10-13 |
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