JP2006029201A - Pump water turbine and method for operating the same - Google Patents

Pump water turbine and method for operating the same Download PDF

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JP2006029201A
JP2006029201A JP2004208782A JP2004208782A JP2006029201A JP 2006029201 A JP2006029201 A JP 2006029201A JP 2004208782 A JP2004208782 A JP 2004208782A JP 2004208782 A JP2004208782 A JP 2004208782A JP 2006029201 A JP2006029201 A JP 2006029201A
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runner
inlet valve
suction pipe
guide vane
power generation
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Yuetsu Uto
祐悦 宇藤
Kotaro Tezuka
光太郎 手塚
Naritoshi Nakagawa
斉年 中川
Akira Shinohara
朗 篠原
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Toshiba Corp
Toshiba Industrial Technology Corp
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Toshiba Corp
Toshiba Industrial Technology Corp
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    • 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

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  • Control Of Water Turbines (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To enable to shift from power generation operation to pumping operation in a short period of time by absorbing kinetic energy of rotation of a pump water turbine in a power generation direction to stop it and increasing rotation in a pumping direction. <P>SOLUTION: The pump water turbine includes an inlet valve 7 attached in a middle of an iron tube 4, a variable guide vane 8 capable of adjusting flow rate attached between the inlet valve and a runner space, a suction pipe gate 10 attached in a middle of a suction pipe 9, a first bypass pipe 12 connecting a position between an upper pond and the inlet valve of the iron pipe and a position between a lower cover 3 and the suction pipe gate of the suction pipe via a first bypass 11, and a second bypass pipe 14 connecting a position between the variable guide vane and the inlet valve of the iron pipe and a position between a lower pond and the suction pipe gate of the suction pipe via a second bypass 13. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明はポンプ水車およびその運転方法に係り、特に、短時間に発電運転（水車運転）から揚水運転（ポンプ運転）に切り換えることができるポンプ水車とその運転方法に関する。   The present invention relates to a pump turbine and a method for operating the pump turbine, and more particularly to a pump turbine and a method for operating the pump turbine that can switch from a power generation operation (turbine operation) to a pumping operation (pump operation) in a short time.

近年の電力自由化に伴い、揚水発電所の重要性が見直されつつある。それは電力の売買において、電力の質的価値に目が向けられるようになってきたためである。電力系統を安定に保つためには、急激な負荷変動にどれだけ俊敏に対応できるかで、価格に差がつくようになってきた。当然、俊敏に対応できる方の電力は安定度が高いので高く売れる。ポンプ水車は揚水運転で余分な電力を吸収し、発電運転でその電力を発生できるため、ほぼ定格容量の２倍の電力の調整が可能な便利な施設である。この電力を高品質にし、どれほど多くの利益を生み出せるかは、いかに短時間に揚水運転から発電運転に、あるいは発電運転から揚水運転に移行できるかに掛かっている。   With the recent liberalization of electricity, the importance of pumped storage power plants is being reviewed. This is because in the buying and selling of electricity, attention has been paid to the qualitative value of electricity. In order to keep the power system stable, there is a difference in price depending on how quickly it can respond to sudden load fluctuations. Naturally, those who can respond quickly are highly stable and sell well. The pump turbine is a convenient facility that can adjust the power almost twice the rated capacity because it absorbs excess power during pumping operation and generates that power during power generation operation. The quality of this power and how much profit it can generate depends on how quickly it is possible to transition from pumping operation to generating operation or from generating operation to pumping operation.

従来は、発電運転から揚水運転移行する場合、図８に示す構成のポンプ水車を図９のタイムチャートに示すように行なっていた。すなわち、切り換え指令に従い、解列後、ガイドベーンを全閉してランナの水中における攪拌抵抗だけで停止する。その後、水面押し下げしてランナ室に空気を充満させ、モータを起動し、定格回転速度で電力系統に並入し、その後ランナ室から排気し、揚水可能な水圧が確立する締切りを経て揚水運転に移行していた。   Conventionally, when shifting from the power generation operation to the pumping operation, the pump turbine having the configuration shown in FIG. 8 is performed as shown in the time chart of FIG. That is, according to the switching command, the guide vanes are fully closed after disengagement, and the runner stops only with the stirring resistance in the water. After that, the water surface is pushed down to fill the runner room with air, the motor is started, the motor is inserted into the power system at the rated speed, and then exhausted from the runner room. It was migrating.

このため、発電運転状態から揚水運転状態に切り換えるのに、約１５分も掛かっていた。短時間に水車停止するために電気的に制動する方法としては、高速回転領域では回生制動があるが、電力を変換するために大容量のサイリスタ装置が必要である。   For this reason, it took about 15 minutes to switch from the power generation operation state to the pumping operation state. As a method of electrically braking in order to stop the turbine in a short time, there is regenerative braking in the high-speed rotation region, but a large-capacity thyristor device is required to convert electric power.

また、時間が掛かる水面押し下げを伴うモータ起動を省略でき、揚水方向に短時間に起動方法として、水中起動がある。しかし、これは２台のポンプ水車を逆極性に結線して１台を起動用として発電運転し、その発生した電力で揚水方向水中起動する側を回してやるBack to Back 方式となり、２台以上のポンプ水車が必要である。   In addition, it is possible to omit the time required to start the motor with the water surface depressing, and there is an underwater start as a start method in a short time in the pumping direction. However, this is a back-to-back method in which two pump turbines are connected in reverse polarity and one unit is used for power generation for starting, and the side that starts in the pumping direction is rotated by the generated power. A pump turbine is required.

なお、揚水運転から発電運転への移行に関する技術としては、特許文献１の技術が知られている。これは、揚水運転から発電運転へクイックチェンジを行なう際に、ポンプ水車の振動、軸振れ、水圧脈動を検出してこの値が規定値よりも小さい場合にガイドベーンを小開度に保持し、規定値よりも大きい場合にはガイドベーンを全閉とするように制御することにより、ポンプ水車の振動、軸振れ、水圧脈動を抑制するものである。   In addition, the technique of patent document 1 is known as a technique regarding the transfer from a pumping operation to a power generation operation. This is because when a quick change from pumping operation to power generation operation is performed, vibration of the pump turbine, shaft runout, water pressure pulsation is detected, and if this value is smaller than the specified value, the guide vane is held at a small opening, When the value is larger than the specified value, the guide vane is controlled so as to be fully closed, thereby suppressing the vibration of the pump turbine, the shaft vibration, and the hydraulic pressure pulsation.

本発明の目的は、発電方向回転の運動エネルギを吸収して停止し、そして揚水方向に回転上昇させ、短時間に発電運転から揚水運転に移行できる、簡便なポンプ水車およびその運転方法を提供することにある。   An object of the present invention is to provide a simple pump turbine and a method for operating the pump turbine that can absorb kinetic energy of rotation in the power generation direction, stop, rotate and rise in the pumping direction, and can shift from power generation operation to pumping operation in a short time. There is.

本発明は上記目的に沿うものであって、請求項１に記載の発明は、上カバーと下カバーにはさまれて形成されるランナ空間内にランナが回転自由に収められ、上池から鉄管によって導かれる高圧水のエネルギをランナによって回転エネルギに変え、主軸を介して発電電動機を回転させ発電する発電運転と、前記発電運転とは逆に、前記発電電動機に電気エネルギを供給することによって前記ランナを回転させ、それにより、下池から吸出し管を経て導入された水を、鉄管を経て上池へ揚水する揚水運転と、を運転切換によって切り換えられるように構成されたポンプ水車において、前記鉄管の途中に取り付けられた入口弁と、前記入口弁と前記ランナ空間との間に取り付けられて流量調節可能な可動ガイドベーンと、前記吸出し管の途中に取り付けられた吸出し管ゲートと、前記鉄管の前記入口弁と上池との間の位置と、前記吸出し管の前記吸出し管ゲートと下カバーとの間の位置とを第１バイパス弁を介して接続する第１バイパス管と、前記鉄管の前記入口弁と可動ガイドベーンとの間の位置と、前記吸出し管の前記吸出し管ゲートと下池の間の位置とを第２バイパス弁を介して接続する第２バイパス管と、を有すること、を特徴とする。   The present invention meets the above-mentioned object, and the invention according to claim 1 is characterized in that the runner is rotatably accommodated in a runner space formed by being sandwiched between the upper cover and the lower cover. In contrast to the power generation operation in which the energy of the high-pressure water led by the runner is converted into rotational energy by the runner and the generator motor is rotated through the main shaft to generate electric power, the electric power is supplied to the generator motor by supplying electric energy to the generator motor. In the pump turbine configured to rotate the runner and thereby to switch the pumping operation in which the water introduced from the lower pond through the suction pipe is pumped to the upper pond through the iron pipe, the operation of the iron pipe is switched. An inlet valve attached in the middle, a movable guide vane attached between the inlet valve and the runner space and adjustable in flow rate, and installed in the middle of the suction pipe. The attached suction pipe gate, the position between the inlet valve of the iron pipe and the upper pond, and the position of the suction pipe between the suction pipe gate and the lower cover are connected via a first bypass valve. A first bypass pipe, a position between the inlet valve of the iron pipe and the movable guide vane, and a position between the suction pipe gate of the suction pipe and the lower pond are connected via a second bypass valve. And 2 bypass pipes.

また、請求項２に記載の発明は、請求項１に記載のポンプ水車の運転方法であって、発電運転から揚水運転に切り換える際に、前記発電電動機を解列し、前記ガイドベーンと入口弁および吸出し管ゲートを閉鎖し、次に、ガイドベーンを小開するとともに前記第１バイパス弁および第２バイパス弁を開放することによってランナに発電運転時と逆方向の水流を与えて、ランナを揚水方向定格回転速度まで上昇させ、次に、電力系統に並入させ、前記第１および第２バイパス弁を閉鎖し、前記入口弁および吸出し管ゲートを開放し、ガイドベーンを閉じ、次に、ガイドベーン開操作すること、を特徴とする。   The invention according to claim 2 is the operation method of the pump-turbine according to claim 1, wherein when the generator operation is switched to the pumping operation, the generator motor is disconnected, and the guide vane and the inlet valve Then, the suction pipe gate is closed, and then the guide vane is opened slightly, and the first bypass valve and the second bypass valve are opened to give the runner a water flow in the opposite direction to that during power generation, thereby pumping the runner. Increase to directional rated speed, then enter into power grid, close said first and second bypass valves, open said inlet valve and suction pipe gate, close guide vanes, then guide The vane opening operation is characterized.

また、請求項３に記載の発明は、上カバーと下カバーにはさまれて形成されるランナ空間内にランナが回転自由に収められ、上池から鉄管によって導かれる高圧水のエネルギをランナによって回転エネルギに変え、主軸を介して発電電動機を回転させ発電する発電運転と、前記発電運転とは逆に、前記発電電動機に電気エネルギを供給することによって前記ランナを回転させ、それにより、下池から吸出し管を経て導入された水を、鉄管を経て上池へ揚水する揚水運転と、を運転切換によって切り換えられるように構成されたポンプ水車において、前記鉄管の途中に取り付けられた入口弁と、前記吸出し管の途中に取り付けられた吸出し管ゲートと、前記入口弁と前記ランナ空間との間に取り付けられて流量調節可能なように回動可能に構成され、しかも９０度以上の角度制御が可能な可動ガイドベーンと、を有すること、を特徴とする。   According to a third aspect of the present invention, the runner is rotatably accommodated in a runner space formed by being sandwiched between the upper cover and the lower cover, and the energy of the high-pressure water guided by the iron pipe from the upper pond is obtained by the runner. In contrast to the power generation operation in which power is generated by rotating the generator motor via the main shaft instead of the rotational energy, and by supplying electric energy to the generator motor, the runner is rotated, thereby In a pump turbine configured to be able to be switched by operation switching, pumping operation for pumping water introduced via a suction pipe to an upper pond via an iron pipe, an inlet valve attached in the middle of the iron pipe, A suction pipe gate attached in the middle of the suction pipe, and is mounted between the inlet valve and the runner space so that the flow rate can be adjusted. It is, moreover to have a movable guide vanes capable angular control of more than 90 degrees, and wherein.

また、請求項４に記載の発明は、請求項３に記載のポンプ水車の運転方法であって、発電運転から揚水運転に切り換える際に、前記発電電動機を解列し、前記ガイドベーンと入口弁を閉鎖し、次に、前記ガイドベーンを通常運転時に比し９０度以上大きく回転させ、前記入口弁を小開して、前記ランナの回転方向と逆向きの水流をランナに作用させ、次に、前記ランナが停止した後に入口弁を閉じ、次に、ガイドベーン開度を通常運転時の閉鎖状態にして水面押し下げ動作に移行すること、を特徴とする。   The invention according to claim 4 is the operation method of the pump turbine according to claim 3, wherein the generator motor is disconnected when the power generation operation is switched to the pumping operation, and the guide vane and the inlet valve Next, the guide vane is rotated by 90 degrees or more compared with that during normal operation, the inlet valve is opened small, and a water flow in a direction opposite to the rotation direction of the runner is applied to the runner. After the runner stops, the inlet valve is closed, and then the guide vane opening degree is set to the closed state during normal operation, and the operation proceeds to the water surface pressing operation.

本発明によれば、短時間に発電運転から揚水運転に移行することができる、簡便なポンプ水車とその運転制御方法を提供できる。   According to the present invention, it is possible to provide a simple pump-turbine and an operation control method thereof that can shift from a power generation operation to a pumping operation in a short time.

以下に、本発明を実施するための最良の実施の形態を図を参照して説明する。ここで、互いに共通または類似の部分には共通の符号を付して、重複説明は省略する。   The best mode for carrying out the present invention will be described below with reference to the drawings. Here, common or similar parts are denoted by common reference numerals, and redundant description is omitted.

［第１の実施の形態］
本発明に係るポンプ水車およびその運転方法の第１の実施の形態について、図１および図２を参照して説明する。図１はこの実施の形態のポンプ水車を示す。ランナ１は、上カバー２と下カバー３にはさまれたランナ空間内に回転自由に収められている。 [First Embodiment]
A first embodiment of a pump turbine and an operation method thereof according to the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 shows a pump turbine according to this embodiment. The runner 1 is rotatably accommodated in a runner space between the upper cover 2 and the lower cover 3.

発電運転時には、上池から鉄管４によって導かれる高圧水を、入口弁７およびガイドベーン８を介してランナ１に導き、この高圧水のエネルギによってランナ１を回転させる。ランナ１の回転によって主軸５が回転し、これによって発電電動機６が回転して発電する。ランナ１を出た水は、吸出し管９を通って下池へ流れる。吸出し管９の途中には、放水路側流水を遮断することができる吸出し管ゲート１０が配置されている。鉄管４からの流水は、入口弁７および可動ガイドベーン８で流量が調節され、ランナ１でほとんどのエネルギを消費する。   During the power generation operation, high-pressure water guided from the upper pond by the iron pipe 4 is guided to the runner 1 through the inlet valve 7 and the guide vane 8, and the runner 1 is rotated by the energy of the high-pressure water. The main shaft 5 is rotated by the rotation of the runner 1, and thereby the generator motor 6 is rotated to generate power. The water exiting the runner 1 flows to the lower pond through the suction pipe 9. In the middle of the suction pipe 9, a suction pipe gate 10 that can shut off the water discharged from the discharge channel is disposed. The flow rate of the flowing water from the iron pipe 4 is adjusted by the inlet valve 7 and the movable guide vane 8, and most of the energy is consumed by the runner 1.

揚水運転時には、発電運転時とは逆に、発電電動機６に電気エネルギを供給し、これによってランナ１を回転させる。このときの水の流れは発電運転時と逆になり、下池から上池に向けて揚水が行なわれる。   Contrary to the power generation operation, during the pumping operation, electric energy is supplied to the generator motor 6, thereby rotating the runner 1. The flow of water at this time is opposite to that during power generation operation, and pumping is performed from the lower pond to the upper pond.

この実施の形態ではさらに、入口弁７より上流側の鉄管４から吸出し管ゲート１０より上流側の吸出し管９とを連通する第１バイパス管１２が設けられている。また、入口弁７より下流側の鉄管４から吸出し管ゲート１０より下流側の吸出し管９を連通する第２バイパス管１４が設けられている。第１バイパス管１２および第２バイパス管のそれぞれの途中に、第１バイパス弁１１、第２バイパス弁１３が配置されている。   In this embodiment, there is further provided a first bypass pipe 12 that communicates the iron pipe 4 upstream of the inlet valve 7 and the suction pipe 9 upstream of the suction pipe gate 10. Further, a second bypass pipe 14 is provided that communicates the iron pipe 4 on the downstream side of the inlet valve 7 with the suction pipe 9 on the downstream side of the suction pipe gate 10. A first bypass valve 11 and a second bypass valve 13 are arranged in the middle of each of the first bypass pipe 12 and the second bypass pipe.

次に、上記のように構成したポンプ水車の運転制御方法について、図２のタイムチャートを参照して説明する。   Next, the operation control method of the pump turbine configured as described above will be described with reference to the time chart of FIG.

発電運転から揚水運転への運転切り換え指令が発せられると、それまで発電していた電力をゼロにし、発電電動機６を電力系統からの切り離しすなわち解列をする。解列と同時にガイドベーン８と入口弁７および吸出し管ゲート１０を閉じる。その後、ガイドベーン８を小開するとともに第１バイパス弁１１および第２バイパス弁１３を開き、第１バイパス管１２および第２バイパス管１４を通じてランナ１に発電時とは逆方向の水を流す。これにより、ランナ１を減速、停止させ、さらに揚水回転方向に加速させる。   When an operation switching command from the power generation operation to the pumping operation is issued, the electric power generated up to that time is set to zero, and the generator motor 6 is disconnected from the power system, that is, disconnected. Simultaneously with the disconnection, the guide vane 8, the inlet valve 7 and the suction pipe gate 10 are closed. Thereafter, the guide vane 8 is opened slightly, and the first bypass valve 11 and the second bypass valve 13 are opened, and water in the direction opposite to that during power generation is caused to flow to the runner 1 through the first bypass pipe 12 and the second bypass pipe 14. Thereby, the runner 1 is decelerated and stopped, and further accelerated in the direction of pumping rotation.

定格回転速度に達したら、発電電動機６を電力系統に接続すなわち並入し、第１バイパス弁１１および第２バイパス弁１３を閉じ、揚水が可能なプライミング水圧が確立する締切りを経て揚水運転に移行する。   When the rated rotational speed is reached, the generator motor 6 is connected to the electric power system, that is, inserted in parallel, the first bypass valve 11 and the second bypass valve 13 are closed, and a transition is made to a pumping operation through a deadline that establishes a priming water pressure capable of pumping water To do.

この方法によれば、発電時とは逆方向の水流が発電方向の回転エネルギを消失させ、さらに揚水方向の回転エネルギを与えることが可能で、水面押し下げによるモータ起動を省略できるから、短時間（たとえば６〜７分）で発電運転から揚水運転に移行することができる。   According to this method, the water flow in the direction opposite to that during power generation can dissipate rotational energy in the power generation direction, and can provide rotational energy in the pumping direction. For example, it is possible to shift from the power generation operation to the pumping operation in 6 to 7 minutes).

［第２の実施の形態］
次に、本発明に係るポンプ水車およびその運転方法の第２の実施の形態について、図３ないし図５を参照して説明する。図３はこの実施の形態のポンプ水車を示す。この実施の形態では、制御角度を通常運転時に比し、９０度以上大きく制御可能なガイドベーン８ａを設けている。これはランナへ流入させる水流の方向を大幅に変更できるものである。なお、図３で、実線は通常の発電運転時（発電運転時）のガイドベーン８ａを示し、破線は制動時のガイドベーン８ａを示す。 [Second Embodiment]
Next, a second embodiment of the pump turbine according to the present invention and a method for operating the pump turbine will be described with reference to FIGS. FIG. 3 shows a pump turbine according to this embodiment. In this embodiment, a guide vane 8a that can be controlled to be 90 degrees or more larger than that during normal operation is provided. This can greatly change the direction of water flow into the runner. In FIG. 3, a solid line indicates the guide vane 8a during normal power generation operation (power generation operation), and a broken line indicates the guide vane 8a during braking.

次に、上記のように構成したポンプ水車の運転制御方法の例について、図４のタイムチャートを参照して説明する。運転切り換え指令が発せられると、それまで発電していた電力をゼロにし、発電電動機６を電力系統から解列をする。解列と同時に入口弁７を全閉し、ガイドベーン８ａの角度を−α方向（図３参照）に大きく回転制御し、図５の破線矢印に示すようにランナ１に回転方向と逆向きの水流を作用させる。   Next, an example of the operation control method of the pump turbine configured as described above will be described with reference to the time chart of FIG. When an operation switching command is issued, the power generated up to that point is set to zero, and the generator motor 6 is disconnected from the power system. Simultaneously with the disconnection, the inlet valve 7 is fully closed, and the angle of the guide vane 8a is largely controlled to rotate in the -α direction (see FIG. 3), and the runner 1 has a direction opposite to the rotational direction as indicated by the broken arrow in FIG. Apply water flow.

発電電動機が停止したら、入口弁７を閉鎖し、ガイドベーン８ａを通常運転時の閉鎖角度にし、水面押し下げ動作に入り、通常の揚水起動を行なう。一方、ガイドベーン８ａが通常運転時の閉鎖角度に達したら、入口弁７は全開する。なお、図５で、実線の矢印は通常の発電運転時（発電運転時）の水流を示し、破線の矢印は制動時の水流を示す。   When the generator motor stops, the inlet valve 7 is closed, the guide vane 8a is brought to the closing angle during normal operation, the water surface is pushed down, and normal pumping is started. On the other hand, when the guide vane 8a reaches the closing angle during normal operation, the inlet valve 7 is fully opened. In FIG. 5, solid arrows indicate the water flow during normal power generation operation (power generation operation), and broken arrows indicate the water flow during braking.

この方法によれば、ランナ１に発電回転方向と逆向きの水流を作用させることにより、発電電動機６を減速停止させることができるから、短時間（たとえば１０〜１１分）で発電運転から揚水運転に移行することができる。   According to this method, the generator motor 6 can be decelerated and stopped by applying a water flow opposite to the direction of power generation rotation to the runner 1, so that the power generation operation and the pumping operation can be performed in a short time (for example, 10 to 11 minutes). Can be migrated to.

［第３の実施の形態］
次に、本発明に係るポンプ水車およびその運転方法の第３の実施の形態について、図６および図７を参照して説明する。この実施の形態は第２の実施の形態の変形例である。図６は第３の実施の形態のポンプ水車を示す。この実施の形態では、制御角度を通常運転時に比し、９０度以上大きく制御可能なガイドベーン８ａを設けたうえ、ランナ１に加えて発電方向とは逆向きのトルクを発生するように設計された補助水車１５を設ける。 [Third Embodiment]
Next, a third embodiment of the pump turbine and the operation method thereof according to the present invention will be described with reference to FIG. 6 and FIG. This embodiment is a modification of the second embodiment. FIG. 6 shows a pump turbine according to the third embodiment. In this embodiment, a guide vane 8a that can be controlled 90 degrees or more larger than that during normal operation is provided, and in addition to the runner 1, it is designed to generate torque in the direction opposite to the power generation direction. A supplementary water turbine 15 is provided.

補助水車１５は、封水部１６を経て、吸出し管９の外に引き出した補助軸１７を介してランナ１と直結している。入口弁７より上池側の鉄管４と吸出し管９とが連通され、補助水車１５に流水を導く補助流路１８には補助水車１５の上流側および下流側にそれぞれ入口補助弁１９および出口補助弁２０が設けられている。   The auxiliary water turbine 15 is directly connected to the runner 1 via an auxiliary shaft 17 that is drawn out of the suction pipe 9 through a sealing portion 16. The iron pipe 4 and the suction pipe 9 on the upper pond side from the inlet valve 7 communicate with each other, and the auxiliary flow path 18 that guides the flowing water to the auxiliary water turbine 15 has an inlet auxiliary valve 19 and an outlet auxiliary on the upstream side and the downstream side of the auxiliary water wheel 15, respectively. A valve 20 is provided.

図７のタイムチャートは、上記構成の水車ポンプの運転方法の例を示す。運転切り換え指令が発せられると、それまで発電していた電力をゼロにし、発電電動機６を電力系統から解列する。解列と同時に入口補助弁１９および出口補助弁２０を開き、補助水車１５に通水するとともに、入口弁７を閉動作する。入口弁７が全閉したら、ガイドベーン８ａの角度を−α方向（図３参照）に大きく回転制御させ、その後、入口弁７を小開してランナ１に回転方向と逆向きの水流を作用させる。   The time chart of FIG. 7 shows an example of the operation method of the water turbine pump having the above configuration. When the operation switching command is issued, the electric power generated up to that time is set to zero, and the generator motor 6 is disconnected from the electric power system. Simultaneously with the disconnection, the inlet auxiliary valve 19 and the outlet auxiliary valve 20 are opened, water is passed through the auxiliary water turbine 15, and the inlet valve 7 is closed. When the inlet valve 7 is fully closed, the angle of the guide vane 8a is largely controlled to rotate in the -α direction (see FIG. 3), and then the inlet valve 7 is opened slightly to apply a water flow in the direction opposite to the rotational direction to the runner 1. Let

発電電動機６が停止点に達した時点で、入口弁７を閉鎖した後、ガイドベーン８ａを通常運転時の閉鎖角度に保ちつつ入口弁７を全開にする。一方、発電電動機６が補助水車１５によって揚水方向に加速され定格速度になったら、並入し、締切りを経て、揚水運転に移行する。並入したら、補助弁１９および補助弁２０を閉じる。   When the generator motor 6 reaches the stop point, the inlet valve 7 is closed, and then the inlet valve 7 is fully opened while maintaining the guide vane 8a at the closing angle during normal operation. On the other hand, when the generator motor 6 is accelerated in the direction of pumping by the auxiliary water turbine 15 and reaches the rated speed, the generator motor 6 enters in parallel, passes through the deadline, and shifts to the pumping operation. After the insertion, the auxiliary valve 19 and the auxiliary valve 20 are closed.

この方法によれば、ランナ１に発電回転方向と逆向きの水流を作用させることにより、発電電動機６を減速停止させることができ、且つ、補助水車１５によって揚水方向定格回転速度まで加速するので、水面押し下げによるモータ起動が省略できるから、短時間（たとえば８〜９分）で発電運転から揚水運転に移行することができる。   According to this method, the generator motor 6 can be decelerated and stopped by applying a water flow in the direction opposite to the power generation rotation direction to the runner 1 and accelerated to the pumping direction rated rotation speed by the auxiliary water turbine 15. Since the motor activation by pushing down the water surface can be omitted, it is possible to shift from the power generation operation to the pumping operation in a short time (for example, 8 to 9 minutes).

本発明の第１の実施形態のポンプ水車を示す模式的立断面図。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic sectional elevation view showing a pump turbine according to a first embodiment of the present invention. 図１のポンプ水車の運転方法を示すタイムチャート。The time chart which shows the driving | running method of the pump turbine of FIG. 本発明の第２の実施形態のポンプ水車の要部を示す模式的部分平断面図。The typical fragmentary plane sectional view which shows the principal part of the pump turbine of the 2nd Embodiment of this invention. 図３のポンプ水車の運転方法を示すタイムチャート。The time chart which shows the operating method of the pump-turbine of FIG. 図３のポンプ水車の動作を説明するための模式的部分平断面図。FIG. 4 is a schematic partial cross-sectional view for explaining the operation of the pump turbine of FIG. 3. 本発明の第３の実施形態のポンプ水車を示す模式的立断面図。The typical elevation sectional view showing the pump turbine of the 3rd embodiment of the present invention. 図６のポンプ水車の運転方法を示すタイムチャート。The time chart which shows the driving | running method of the pump turbine of FIG. 従来のポンプ水車を示す模式的立断面図。The typical elevation sectional view showing the conventional pump turbine. 従来のポンプ水車の運転方法を示すタイムチャート。The time chart which shows the driving method of the conventional pump turbine.

符号の説明Explanation of symbols

１…ランナ、２…上カバー、３…下カバー、４…鉄管、５…主軸、６…発電電動機、７…入口弁、８、８ａ…ガイドベーン、９…吸出し管、１０…吸出し管ゲート、１１…第１バイパス弁、１２…第１バイパス管、１３…第２バイパス弁、１４…第２バイパス管、１５…補助水車、１６…封水部、１７…補助軸、１８…補助流路、１９…入口補助弁、２０…出口補助弁。

DESCRIPTION OF SYMBOLS 1 ... Runner, 2 ... Upper cover, 3 ... Lower cover, 4 ... Iron pipe, 5 ... Main shaft, 6 ... Generator motor, 7 ... Inlet valve, 8, 8a ... Guide vane, 9 ... Suction pipe, 10 ... Suction pipe gate, DESCRIPTION OF SYMBOLS 11 ... 1st bypass valve, 12 ... 1st bypass pipe, 13 ... 2nd bypass valve, 14 ... 2nd bypass pipe, 15 ... Auxiliary water wheel, 16 ... Sealing part, 17 ... Auxiliary shaft, 18 ... Auxiliary flow path, 19 ... Inlet auxiliary valve, 20 ... Outlet auxiliary valve.

Claims (6)

上カバーと下カバーにはさまれて形成されるランナ空間内にランナが回転自由に収められ、上池から鉄管によって導かれる高圧水のエネルギをランナによって回転エネルギに変え、主軸を介して発電電動機を回転させ発電する発電運転と、前記発電運転とは逆に、前記発電電動機に電気エネルギを供給することによって前記ランナを回転させ、それにより、下池から吸出し管を経て導入された水を、鉄管を経て上池へ揚水する揚水運転と、を運転切換によって切り換えられるように構成されたポンプ水車において、
前記鉄管の途中に取り付けられた入口弁と、
前記入口弁と前記ランナ空間との間に取り付けられて流量調節可能な可動ガイドベーンと、
前記吸出し管の途中に取り付けられた吸出し管ゲートと、
前記鉄管の前記入口弁と上池との間の位置と、前記吸出し管の前記吸出し管ゲートと下カバーとの間の位置とを第１バイパス弁を介して接続する第１バイパス管と、
前記鉄管の前記入口弁と可動ガイドベーンとの間の位置と、前記吸出し管の前記吸出し管ゲートと下池の間の位置とを第２バイパス弁を介して接続する第２バイパス管と、
を有すること、を特徴とするポンプ水車。 The runner is rotatably accommodated in a runner space formed between the upper cover and the lower cover, and the high-pressure water energy led from the upper pond by the iron pipe is converted into rotational energy by the runner. In contrast to the power generation operation in which power is generated by rotating the power generator and the power generation operation, the runner is rotated by supplying electric energy to the generator motor, whereby water introduced from the lower pond via the suction pipe is supplied to the iron pipe. In the pump turbine configured to be switched by operation switching, pumping operation to pump water to the upper pond via
An inlet valve attached in the middle of the iron pipe;
A movable guide vane attached between the inlet valve and the runner space and capable of adjusting the flow rate;
A suction pipe gate attached in the middle of the suction pipe;
A first bypass pipe connecting a position between the inlet valve and the upper pond of the iron pipe and a position between the suction pipe gate and the lower cover of the suction pipe via a first bypass valve;
A second bypass pipe connecting a position between the inlet valve of the iron pipe and the movable guide vane and a position between the suction pipe gate and the lower pond of the suction pipe via a second bypass valve;
A pump-turbine characterized by comprising: 請求項１に記載のポンプ水車の運転方法であって、
発電運転から揚水運転に切り換える際に、
前記発電電動機を解列し、前記ガイドベーンと入口弁および吸出し管ゲートを閉鎖し、
次に、ガイドベーンを小開するとともに前記第１バイパス弁および第２バイパス弁を開放することによってランナに発電運転時と逆方向の水流を与えて、ランナを揚水方向定格回転速度まで上昇させ、
次に、電力系統に並入させ、前記第１および第２バイパス弁を閉鎖し、前記入口弁および吸出し管ゲートを開放し、ガイドベーンを閉じ、
次に、ガイドベーン開操作すること、
を特徴とするポンプ水車の運転方法。 A method for operating a pump turbine according to claim 1,
When switching from power generation operation to pumping operation,
Disconnecting the generator motor, closing the guide vane and the inlet valve and the suction pipe gate,
Next, by opening the guide vanes and opening the first bypass valve and the second bypass valve, the runner is given a water flow in the opposite direction to that during power generation operation, and the runner is raised to the pumping direction rated rotational speed,
Next, enter the power system, close the first and second bypass valves, open the inlet valve and suction pipe gate, close the guide vane,
Next, open the guide vane,
A driving method of a pump-turbine characterized by the above. 上カバーと下カバーにはさまれて形成されるランナ空間内にランナが回転自由に収められ、上池から鉄管によって導かれる高圧水のエネルギをランナによって回転エネルギに変え、主軸を介して発電電動機を回転させ発電する発電運転と、前記発電運転とは逆に、前記発電電動機に電気エネルギを供給することによって前記ランナを回転させ、それにより、下池から吸出し管を経て導入された水を、鉄管を経て上池へ揚水する揚水運転と、を運転切換によって切り換えられるように構成されたポンプ水車において、
前記鉄管の途中に取り付けられた入口弁と、
前記吸出し管の途中に取り付けられた吸出し管ゲートと、
前記入口弁と前記ランナ空間との間に取り付けられて流量調節可能なように回動可能に構成され、しかも９０度以上の角度制御が可能な可動ガイドベーンと、
を有すること、を特徴とするポンプ水車。 The runner is rotatably accommodated in a runner space formed between the upper cover and the lower cover, and the high-pressure water energy led from the upper pond by the iron pipe is converted into rotational energy by the runner. In contrast to the power generation operation in which power is generated by rotating the power generator and the power generation operation, the runner is rotated by supplying electric energy to the generator motor, whereby water introduced from the lower pond via the suction pipe is supplied to the iron pipe. In the pump turbine configured to be switched by operation switching, pumping operation to pump water to the upper pond via
An inlet valve attached in the middle of the iron pipe;
A suction pipe gate attached in the middle of the suction pipe;
A movable guide vane mounted between the inlet valve and the runner space and configured to be rotatable so that the flow rate can be adjusted, and capable of controlling an angle of 90 degrees or more;
A pump-turbine characterized by comprising: 請求項３に記載のポンプ水車の運転方法であって、
発電運転から揚水運転に切り換える際に、
前記発電電動機を解列し、前記ガイドベーンと入口弁を閉鎖し、
次に、前記ガイドベーンを通常運転時に比し９０度以上大きく回転させ、前記入口弁を小開して、前記ランナの回転方向と逆向きの水流をランナに作用させ、
次に、前記ランナが停止した後に入口弁を閉じ、
次に、ガイドベーン開度を通常運転時の閉鎖状態にして水面押し下げ動作に移行すること、
を特徴とするポンプ水車の運転方法。 It is a driving method of the pump turbine according to claim 3,
When switching from power generation operation to pumping operation,
Disconnect the generator motor, close the guide vane and inlet valve,
Next, the guide vane is rotated by 90 degrees or more compared with that during normal operation, the inlet valve is opened small, and a water flow opposite to the rotation direction of the runner is applied to the runner,
Next, after the runner stops, close the inlet valve,
Next, the guide vane opening degree is closed during normal operation and the water surface is pushed down.
A driving method of a pump-turbine characterized by the above. 請求項３に記載のポンプ水車において、前記ランナの発電時の回転方向と逆向きのトルクを発生する補助水車を前記ランナに直結して設けたこと、を特徴とするポンプ水車。   4. The pump turbine according to claim 3, wherein an auxiliary turbine that generates torque in a direction opposite to a rotation direction of the runner during power generation is directly connected to the runner. 請求項５に記載のポンプ水車の運転方法であって、
発電運転から揚水運転に切り換える際に、
前記発電電動機を解列し、前記ガイドベーンと入口弁を閉鎖し、
次に、前記ガイドベーンを通常運転時に比し９０度以上大きく回転させ、前記入口弁を小開して、前記ランナの回転方向と逆向きの水流をランナに作用させ、前記補助水車に鉄管から通水し、
次に、前記ランナが停止した後に入口弁を閉じ、
次に、ガイドベーン開度を通常運転時の閉鎖状態にし、
次に、この状態で入口弁を全開させる一方、発電電動機を揚水方向定格回転速度まで回転上昇させ、
次に、電力系統に並入させ、前記補助水車の流路の通水を停止し、揚水運転に移行すること、
を特徴とするポンプ水車の運転方法。

A method of operating a pump turbine according to claim 5,
When switching from power generation operation to pumping operation,
Disconnect the generator motor, close the guide vane and inlet valve,
Next, the guide vane is rotated 90 degrees or more larger than that during normal operation, the inlet valve is opened small, and a water flow opposite to the rotation direction of the runner is applied to the runner, and the auxiliary turbine is Pass water,
Next, after the runner stops, close the inlet valve,
Next, the guide vane opening is closed during normal operation,
Next, while fully opening the inlet valve in this state, the generator motor is rotated up to the rated rotational speed in the pumping direction,
Next, entering the power system in parallel, stopping the flow of water through the auxiliary water turbine and shifting to the pumping operation,
A driving method of a pump-turbine characterized by the above.

JP2004208782A 2004-07-15 2004-07-15 Pump water turbine and method for operating the same Pending JP2006029201A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007255315A (en) * 2006-03-23 2007-10-04 Tanaka Suiryoku Kk Francis turbine for hydraulic power generation
JP2010509537A (en) * 2006-11-10 2010-03-25 ジョセフ パオリ Reversible hydroelectric generator
CZ303917B6 (en) * 2006-10-05 2013-06-26 Jakoube@Jirí Water turbine draft tube
EP2567085A4 (en) * 2010-05-03 2017-11-29 Honeywell International Inc. Flow-control assembly with a rotating fluid expander

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007255315A (en) * 2006-03-23 2007-10-04 Tanaka Suiryoku Kk Francis turbine for hydraulic power generation
CZ303917B6 (en) * 2006-10-05 2013-06-26 Jakoube@Jirí Water turbine draft tube
JP2010509537A (en) * 2006-11-10 2010-03-25 ジョセフ パオリ Reversible hydroelectric generator
EP2567085A4 (en) * 2010-05-03 2017-11-29 Honeywell International Inc. Flow-control assembly with a rotating fluid expander

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