JPH09291875A - Speed governing controller for kaplan water turbine - Google Patents
Speed governing controller for kaplan water turbineInfo
- Publication number
- JPH09291875A JPH09291875A JP8108981A JP10898196A JPH09291875A JP H09291875 A JPH09291875 A JP H09291875A JP 8108981 A JP8108981 A JP 8108981A JP 10898196 A JP10898196 A JP 10898196A JP H09291875 A JPH09291875 A JP H09291875A
- Authority
- JP
- Japan
- Prior art keywords
- overspeed
- water turbine
- turbine
- speed
- interlocking
- 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
-
- 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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Landscapes
- Hydraulic Turbines (AREA)
- Control Of Water Turbines (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、水力発電所に設置
するカプラン水車の調速制御装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speed control device for a Kaplan turbine installed in a hydroelectric power plant.
【０００２】[0002]
【従来の技術】従来のカプラン水車用調速制御装置の一
例のブロック線図を図４に示す。図中、１は水車及び水
理系、２は速度設定部、３は調速制御部、４は開度／開
閉指令部、５はＧＶ（ガイドベーン；案内羽根）コンバ
ータ、６はＧＶ配圧弁、７はＧＶサーボモータ、８はＧ
Ｖ復原部であって、前記水車及び水理系１の回転速度検
出信号（検出値）を前記速度設定部２の出力信号（速度
設定値）と突き合わせ、更にその差と前記復原部８の出
力信号を突き合わせて前記調速制御部３の入力としてい
る。2. Description of the Related Art FIG. 4 shows a block diagram of an example of a conventional speed control device for a Kaplan turbine. In the figure, 1 is a hydraulic turbine and hydraulic system, 2 is a speed setting unit, 3 is a speed control unit, 4 is an opening / opening / closing command unit, 5 is a GV (guide vane; guide vane) converter, 6 is a GV pressure distribution valve, 7 is a GV servo motor, 8 is G
In the V restoration section, the rotation speed detection signal (detection value) of the hydraulic turbine and hydraulic system 1 is compared with the output signal (speed set value) of the speed setting section 2, and the difference between them and the output signal of the restoration section 8 Are matched with each other and are input to the speed control unit 3.
【０００３】９´はＧＶ（案内羽根）−ＲＶ（ランナベ
ーン；ランナ羽根）連動制御部、１０はＲＶコンバー
タ、１１はＲＶ配圧弁、１２はＲＶサーボモータ、１３
はＲＶ復原部であって、このＲＶ復原部１３の出力信号
を前記調速制御部３の出力信号と突き合わせ、その差を
前記ＧＶ−ＲＶ連動制御部９´の入力としている。Reference numeral 9'is a GV (guide vane) -RV (runner vane; runner vane) interlocking control unit, 10 is an RV converter, 11 is an RV pressure distributing valve, 12 is an RV servo motor, and 13
Is an RV restoration unit, and the output signal of the RV restoration unit 13 is matched with the output signal of the speed control unit 3 and the difference between them is input to the GV-RV interlocking control unit 9 '.
【０００４】従来のカプラン水車用調速制御装置の他の
例のブロック線図を図５に示す。この例は、ＧＶ、ＲＶ
制御系列の復原部８、１３の出力信号を突き合わせてそ
の差を前記ＧＶ−ＲＶ連動制御部９´の入力とした点が
図４と異なる。FIG. 5 shows a block diagram of another example of the conventional governor speed control device for Kaplan turbines. This example is GV, RV
It differs from FIG. 4 in that the output signals of the control units 8 and 13 of the control series are matched and the difference is used as the input of the GV-RV interlocking control unit 9 '.
【０００５】両例では、調速制御部３の出力信号を開度
／開閉指令部４、ＧＶコンバータ５、ＧＶ配圧弁６、Ｇ
Ｖサーボモータ７のＧＶ制御系列に与えるとともに、Ｇ
Ｖ−ＲＶ連動制御部９´を介してＲＶコンバータ１０、
ＲＶ配圧弁１１、ＲＶサーボモータ１２のＲＶ制御系列
にも与えている。つまり、ＧＶとＲＶの連動制御により
高効率での運転を行うようにしている。ＧＶとＲＶの連
動制御により高効率運転を実現できることは、図６及び
図７から理解される。図６はＧＶサーボモータストロー
ク（ＧＶ開度）と水車出力の関係をＲＶ開度をパラメー
タとして表した特性図、図７はＧＶサーボモータストロ
ーク（ＧＶ開度）と水車効率の関係をＲＶ開度をパラメ
ータとして表した特性図である。In both examples, the output signal of the speed control unit 3 is used as an opening / opening / closing command unit 4, a GV converter 5, a GV pressure distribution valve 6, G.
It is applied to the GV control system of the V servo motor 7 and G
The RV converter 10 via the V-RV interlocking control unit 9 ',
It is also given to the RV control system of the RV pressure distribution valve 11 and the RV servomotor 12. In other words, the GV and RV are interlocked to operate with high efficiency. It can be understood from FIGS. 6 and 7 that high efficiency operation can be realized by the interlocked control of GV and RV. FIG. 6 is a characteristic diagram showing the relationship between the GV servo motor stroke (GV opening) and the turbine output using the RV opening as a parameter, and FIG. 7 shows the relationship between the GV servo motor stroke (GV opening) and the turbine efficiency as the RV opening. It is a characteristic view which represented as a parameter.
【０００６】[0006]
【発明が解決しようとする課題】従来例では、常時連動
制御を行っているため、負荷遮断などで水車が過速度に
なった時にもＧＶの閉動作に追随してＲＶの閉動作が行
われる。この結果、水車の高効率運転状態（実際には、
ＧＶ閉鎖時間に比べＲＶ閉鎖時間が遅いため、高効率運
転状態から若干外れる）が維持されるため、図３に実線
で示すように水車・発電機の速度上昇率δnが大きくな
る、といった不具合が生じる。In the conventional example, since the interlocking control is always performed, the RV closing operation is performed following the GV closing operation even when the turbine is overspeeded due to load shedding or the like. . As a result, the highly efficient operating state of the water turbine (actually,
Since the RV closing time is slower than the GV closing time, the high efficiency operation state is slightly deviated), and the speed increase rate δ n of the water turbine / generator increases as shown by the solid line in FIG. 3. Occurs.
【０００７】そこで本発明は、上記課題を解決し、負荷
遮断などによる水車の過速時に水車・発電機の速度上昇
率δnを適確に抑制できるカプラン水車用調速制御装置
を提供することを目的とする。Therefore, the present invention solves the above problems and provides a speed control device for a Kaplan turbine, which can appropriately suppress the speed increase rate δ n of the turbine / generator when the turbine is overspeeded due to load shedding or the like. The purpose is to
【０００８】[0008]
【課題を解決するための手段】本発明は、ＧＶ制御系列
とＲＶ制御系列との間にＧＶ−ＲＶ連動制御部を設けた
カプラン水車用調速制御装置において、水車の過速を検
出する過速検出部を設け、過速検出時に連動制御ブロッ
ク信号を前記ＧＶ−ＲＶ連動制御部へ送出するようにし
たことを特徴とする。According to the present invention, an overspeed of a turbine is detected in a Kaplan turbine speed governor control device having a GV-RV interlocking control section provided between a GV control series and an RV control series. An overspeed detection unit is provided, and an interlocking control block signal is sent to the GV-RV interlocking control unit when an overspeed is detected.
【０００９】また本発明は、ＧＶ制御系列とＲＶ制御系
列との間にＧＶ−ＲＶ連動制御部を設けたカプラン水車
用調速制御装置において、水車の過速を検出する過速検
出部を設け、重負荷となるＧＶ開度一定値以上を連動制
御ロック条件として過速検出に加えたことを特徴とす
る。Further, according to the present invention, in a Kaplan turbine speed control device having a GV-RV interlocking control unit between the GV control system and the RV control system, an overspeed detecting unit for detecting an overspeed of the water turbine is provided. It is characterized in that a certain value or more of the GV opening which becomes a heavy load is added to the overspeed detection as a linked control lock condition.
【００１０】更に本発明は、ＧＶ制御系列とＲＶ制御系
列との間にＧＶ−ＲＶ連動制御部を設けたカプラン水車
用調速制御装置において、水車の過速を、水車の回転速
度または回転速度上昇時の変化率が一定値以上となった
ことで検出し、これを単独、または重負荷となるＧＶ開
度一定値以上と共に連動制御ロック条件とするようにし
たことを特徴とする。Further, according to the present invention, in a Kaplan turbine speed control device having a GV-RV interlocking control unit between the GV control system and the RV control system, the overspeed of the turbine is determined by the rotational speed or rotation of the turbine. It is characterized in that it is detected when the rate of change at the time of speed increase becomes a certain value or more, and this is set as the interlocking control lock condition independently or together with a certain value or more of the GV opening which becomes a heavy load.
【００１１】[0011]
【発明の実施の形態】図１に本発明の一実施形態のブロ
ック線図を示す。図中、１は水車及び水理系、２は速度
設定部、３は調速制御部、４は開度／開閉指令部、５は
ＧＶ（ガイドベーン；案内羽根）コンバータ、６はＧＶ
配圧弁、７はＧＶサーボモータ、８はＧＶ復原部であっ
て、前記水車及び水理系１の回転速度検出信号（検出
値）を前記速度設定部２の出力信号（速度設定値）と突
き合わせ、更にその差と前記復原部８の出力信号を突き
合わせて前記調速制御部３の入力としている。1 is a block diagram of an embodiment of the present invention. In the figure, 1 is a hydraulic turbine and hydraulic system, 2 is a speed setting unit, 3 is a speed control unit, 4 is an opening / opening / closing command unit, 5 is a GV (guide vane; guide vane) converter, and 6 is a GV.
A pressure distribution valve, 7 is a GV servo motor, and 8 is a GV restoration unit, and the rotational speed detection signal (detection value) of the hydraulic turbine and hydraulic system 1 is matched with the output signal (speed setting value) of the speed setting unit 2, Further, the difference and the output signal of the restoration section 8 are matched and used as the input of the speed control section 3.
【００１２】９はＧＶ（案内羽根）−ＲＶ（ランナ羽
根）連動制御部、１０はＲＶコンバータ、１１はＲＶ配
圧弁、１２はＲＶサーボモータ、１３はＲＶ復原部であ
って、このＲＶ復原部１３の出力信号を前記調速制御部
３の出力信号と突き合わせ、その差を前記ＧＶ−ＲＶ連
動制御部９の入力としている。１４は過速検出部で、前
記水車及び水理系１の回転速度検出信号を入力とし、過
速検出時に連動制御ロック信号を前記ＧＶ−ＲＶ連動制
御部９へ送出するようにしている。Reference numeral 9 is a GV (guide vane) -RV (runner vane) interlocking control unit, 10 is an RV converter, 11 is an RV pressure distributing valve, 12 is an RV servo motor, and 13 is an RV restoring unit. The output signal of 13 is matched with the output signal of the speed control unit 3, and the difference is input to the GV-RV interlocking control unit 9. Reference numeral 14 denotes an overspeed detection unit, which receives the rotation speed detection signals of the hydraulic turbine and hydraulic system 1 and sends an interlocking control lock signal to the GV-RV interlocking control unit 9 when an overspeed is detected.
【００１３】次に、動作について述べる。平常の回転速
度で水車１が運転されている場合は、ＧＶ−ＲＶ連動制
御部９が機能しており、ＧＶ、ＲＶの連動制御が行われ
ている。つまり、高効率運転状態となっている。Next, the operation will be described. When the water turbine 1 is operating at a normal rotation speed, the GV-RV interlocking control unit 9 is functioning, and interlocking control of GV and RV is performed. That is, it is in a highly efficient operation state.
【００１４】もし、この状態で負荷遮断が行われると、
水車１が過速度となり、これが過速検出部１４で検出さ
れる。過速検出時に連動制御ロック信号がＧＶ−ＲＶ連
動制御部９へ送出され、連動制御がロックされる。これ
により、水車１は高効率運転状態から外れ、水車１の加
速トルクは小さくなる。このため、水車・発電機の速度
上昇率δnは図３に２点鎖線で示すように小さな値に抑
えられる。If the load is cut off in this state,
The water turbine 1 becomes overspeed, and this is detected by the overspeed detection unit 14. When the overspeed is detected, the interlocking control lock signal is sent to the GV-RV interlocking control unit 9, and the interlocking control is locked. As a result, the water turbine 1 deviates from the highly efficient operation state, and the acceleration torque of the water turbine 1 becomes small. Therefore, the speed increase rate δ n of the water turbine / generator is suppressed to a small value as shown by the chain double-dashed line in FIG.
【００１５】図２に本発明の他の実施形態のブロック線
図を示す。この実施形態では、重負荷をもロック条件と
した過速検出部１５を用いている。ＧＶ開度が一定値以
上の時に重負荷と判断するため、ＧＶ開度信号、例えば
ＧＶ復原部８の出力信号を入力としている。水車及び水
理系１の回転速度検出信号を入力とすることは、図１と
同様である。FIG. 2 shows a block diagram of another embodiment of the present invention. In this embodiment, the overspeed detection unit 15 that uses a heavy load as a lock condition is used. The GV opening signal, for example, the output signal of the GV restoration unit 8 is input to determine that the load is heavy when the GV opening is equal to or greater than a certain value. Inputting the rotational speed detection signals of the hydraulic turbine and hydraulic system 1 is the same as in FIG.
【００１６】この場合には、重負荷状態で負荷遮断が行
われ水車が過速となった時のみ、連動制御ロック信号が
連動制御部９へ送出されて、連動制御がロックされる。
この結果、水車・発電機の速度上昇率δnは小さな値に
抑えられる。速度上昇率δnの値が問題となるのは重負
荷（大出力）時であり、制御性の改善に大いに貢献する
ことになる。In this case, the interlocking control lock signal is sent to the interlocking control unit 9 only when the load is cut off in the heavy load state and the water turbine becomes overspeed, and the interlocking control is locked.
As a result, the speed increase rate [delta] n hydraulic turbines and generator can be suppressed to a small value. The value of the speed increase rate δ n becomes a problem at the time of heavy load (large output), which greatly contributes to the improvement of controllability.
【００１７】なお、上記説明では水車の過速を回転速度
検出値から判断したが、水車の回転速度上昇時にその変
化率が一定値以上となったことで過速と判断するように
してもよい。In the above description, the overspeed of the water turbine is determined from the rotation speed detection value. However, when the rotation speed of the water turbine rises, the rate of change thereof may become a certain value or more, and the overspeed may be determined. .
【００１８】[0018]
【発明の効果】以上のように本発明によれば、水車の過
速を検出しＧＶ−ＲＶ連動制御をロックするようにした
ので、負荷遮断などによる水車の過速時に水車・発電機
の速度上昇率δnを適確に抑えることができるようにな
り、安定制御に寄与し得る。特に、重負荷状態における
負荷遮断時に有効である。また、同じ速度上昇率δnを
許容する場合には、発電機の慣性モーメントを小さくす
ることができるため、小形化により経済的な発電機を製
作できる。As described above, according to the present invention, since the overspeed of the water turbine is detected and the GV-RV interlocking control is locked, the speed of the water turbine / generator when the water turbine overspeeds due to load shedding or the like. The rate of increase Δ n can be suppressed appropriately, which can contribute to stable control. This is especially effective when the load is cut off in a heavy load state. Further, when the same speed increase rate δ n is allowed, the inertia moment of the generator can be reduced, so that an economical generator can be manufactured by downsizing.
【図１】本発明の一実施形態を示すブロック線図。FIG. 1 is a block diagram showing an embodiment of the present invention.
【図２】本発明の他の実施形態を示すブロック線図。FIG. 2 is a block diagram showing another embodiment of the present invention.
【図３】負荷遮断時におけるカプラン水車・発電機の速
度上昇率δnの変化を示す曲線図。FIG. 3 is a curve diagram showing changes in the speed increase rate δ n of the Kaplan turbine / generator when the load is cut off.
【図４】従来のカプラン水車用調速制御装置の一例を示
すブロック線図。FIG. 4 is a block diagram showing an example of a conventional Kaplan turbine speed control device.
【図５】従来のカプラン水車用調速制御装置の他の例を
示すブロック線図。FIG. 5 is a block diagram showing another example of a conventional Kaplan turbine speed control device.
【図６】ＧＶサーボモータストローク（ＧＶ開度）と水
車出力の関係をＲＶ開度をパラメータとして表した特性
図。FIG. 6 is a characteristic diagram showing the relationship between the GV servo motor stroke (GV opening) and the turbine output using the RV opening as a parameter.
【図７】ＧＶサーボモータストローク（ＧＶ開度）と水
車効率の関係をＲＶ開度をパラメータとして表した特性
図。FIG. 7 is a characteristic diagram showing the relationship between the GV servo motor stroke (GV opening) and the turbine efficiency with the RV opening as a parameter.
１…水車及び水理系 ２…速度設定部 ３…調速制御部 ４…開度／開閉指令部 ５…ＧＶコンバータ ６…ＧＶ配圧弁 ７…ＧＶサーボモータ ８…ＧＶ復原部 ９…ＧＶ−ＲＶ連動制御部 １０…ＲＶコンバータ １１…ＲＶ配圧弁 １２…ＲＶサーボモータ １３…ＲＶ復原部 １４、１５…過速検出部 1 ... Water turbine and hydraulic system 2 ... Speed setting unit 3 ... Speed control unit 4 ... Opening / opening / closing command unit 5 ... GV converter 6 ... GV pressure distribution valve 7 ... GV servo motor 8 ... GV restoration unit 9 ... GV-RV interlocking Control unit 10 ... RV converter 11 ... RV pressure distribution valve 12 ... RV servo motor 13 ... RV restoration unit 14, 15 ... Overspeed detection unit
Claims (3)
Ｖ−ＲＶ連動制御部を設けたカプラン水車用調速制御装
置において、水車の過速を検出する過速検出部を設け、
過速検出時に連動制御ブロック信号を前記ＧＶ−ＲＶ連
動制御部へ送出するようにしたことを特徴とするカプラ
ン水車用調速制御装置。1. A G between a GV control sequence and an RV control sequence
In a speed control device for a Kaplan turbine provided with a V-RV interlocking control section, an overspeed detecting section for detecting an overspeed of the turbine is provided,
A speed control device for a Kaplan turbine, wherein an interlocking control block signal is sent to the GV-RV interlocking control unit when an overspeed is detected.
制御ロック条件として加えたことを特徴とする請求項１
に記載のカプラン水車用調速制御装置。2. The GV opening constant value equal to or greater than a heavy load is added as an interlocking control lock condition.
The speed control device for a Kaplan turbine described in.
転速度上昇時の変化率が一定値以上となったことで検出
するようにしたことを特徴とする請求項１または２に記
載のカプラン水車用調速制御装置。3. The overspeed of the water turbine is detected when the rotational speed of the water turbine or the rate of change when the rotational speed rises exceeds a certain value. Speed control device for Kaplan turbine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10898196A JP3879138B2 (en) | 1996-04-30 | 1996-04-30 | Kaplan water turbine speed control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10898196A JP3879138B2 (en) | 1996-04-30 | 1996-04-30 | Kaplan water turbine speed control system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09291875A true JPH09291875A (en) | 1997-11-11 |
| JP3879138B2 JP3879138B2 (en) | 2007-02-07 |
Family
ID=14498563
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10898196A Expired - Fee Related JP3879138B2 (en) | 1996-04-30 | 1996-04-30 | Kaplan water turbine speed control system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3879138B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005330819A (en) * | 2004-05-18 | 2005-12-02 | Hitachi Ltd | Method and device for controlling water wheel runner vane |
| CN107939577A (en) * | 2017-11-28 | 2018-04-20 | 南瑞集团有限公司 | A kind of hydrogovernor proportional servo valve on-line fault diagnosis method |
-
1996
- 1996-04-30 JP JP10898196A patent/JP3879138B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005330819A (en) * | 2004-05-18 | 2005-12-02 | Hitachi Ltd | Method and device for controlling water wheel runner vane |
| JP4607492B2 (en) * | 2004-05-18 | 2011-01-05 | 株式会社日立製作所 | Control method and control device for turbine runner vane |
| CN107939577A (en) * | 2017-11-28 | 2018-04-20 | 南瑞集团有限公司 | A kind of hydrogovernor proportional servo valve on-line fault diagnosis method |
| CN107939577B (en) * | 2017-11-28 | 2019-04-23 | 南瑞集团有限公司 | A kind of hydrogovernor proportional servo valve on-line fault diagnosis method |
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| JP3879138B2 (en) | 2007-02-07 |
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