JPS6323389B2 - - Google Patents
Info
- Publication number
- JPS6323389B2 JPS6323389B2 JP55051488A JP5148880A JPS6323389B2 JP S6323389 B2 JPS6323389 B2 JP S6323389B2 JP 55051488 A JP55051488 A JP 55051488A JP 5148880 A JP5148880 A JP 5148880A JP S6323389 B2 JPS6323389 B2 JP S6323389B2
- Authority
- JP
- Japan
- Prior art keywords
- guide vane
- discharge valve
- opening
- pump
- pump discharge
- 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
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 33
- 238000000034 method Methods 0.000 claims description 16
- 238000005086 pumping Methods 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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
- Control Of Water Turbines (AREA)
Description
【発明の詳細な説明】
本発明はタンデム式揚水発電所の運転制御方法
の改良に係り、特に揚水運転から停止への移行を
スムーズに行なえるようにした運転制御方法に関
する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in an operation control method for a tandem pumped storage power plant, and particularly to an operation control method that allows smooth transition from pumping operation to shutdown.
第１図に示すように水車１とポンプ２を同軸に
直結したタンデム発電所において、揚水運転時に
は、水車１はガイドベーン１１を全閉とされ、ラ
ンナ１２は流路内の水をランナの下端に押下げら
れて空転しており、また、ポンプ２は吐出弁２１
を全閉とされ、インペラ２２は充水されて矢符
QPで示す方向に揚水している。 As shown in Fig. 1, in a tandem power plant in which a water turbine 1 and a pump 2 are directly connected coaxially, during pumping operation, the guide vanes 11 of the water turbine 1 are fully closed, and the runner 12 pumps water in the flow path to the lower end of the runner. The pump 2 is pressed down by the pump and is idling, and the pump 2 is also
is fully closed, and the impeller 22 is filled with water and the arrow mark
Water is being pumped in the direction shown by Q P.
この揚水運転状態から停止状態に移行する場
合、運転モードの変更に伴なう電力動揺を極力小
さく押えるようにするため、第２図の状態図に示
すような運転制御方式が用いられている。 When transitioning from the pumping operation state to the stop state, an operation control method as shown in the state diagram of FIG. 2 is used in order to minimize power fluctuations caused by changing the operation mode.
同図において、時刻ｔ＝t1から水車ガイドベー
ン開度GVを開き、水車を起動させる。ガイドベ
ーン開度GVを徐々に開いて行くと水車出力Ptは
次第に増加するので、これによつて、ポンプ軸入
力に見合う系統からの供給電力を漸次負担させ
る。時刻ｔ＝t2において、水車ガイドベーン開度
GVおよび水車出力Ptが100％、系統からの供給
電力PLが零となつた状態（この時の水の流れは
第１図の矢符Qtに示すようになつている）とな
る。そして運転制御上より決まるある時間遅れ時
刻ｔ＝t3で、主断路器CBを解列することにより
系統への電力動揺を比較的小さく抑えることがで
きる。その後、水車ガイドベーン（第１図の１
１）の開度GVとポンプ吐出弁（第１図の２１）
の開度DVを閉動作させることにより、水車負荷
の減少に基くブレーキ作用と回転部の慣性力の相
互作用によつて主機の回転数は漸減し、停止状態
（ｔ≧t5）に至る。 In the figure, from time t= t1 , the water turbine guide vane opening degree GV is opened and the water turbine is started. As the guide vane opening degree GV is gradually opened, the water turbine output P t gradually increases, thereby gradually increasing the amount of power supplied from the system corresponding to the pump shaft input. At time t = t 2 , the water turbine guide vane opening degree
The GV and turbine output P t are 100%, and the power supplied from the grid PL is zero (the flow of water at this time is as shown by the arrow Q t in Figure 1). Then, by disconnecting the main disconnector CB at a certain time delay time t= t3 , which is determined based on operational control, it is possible to suppress power fluctuations to the grid to a relatively small value. After that, the water turbine guide vane (1 in Figure 1)
1) Opening GV and pump discharge valve (21 in Figure 1)
By closing the opening degree DV, the rotational speed of the main engine gradually decreases due to the interaction between the braking action based on the reduction in the water wheel load and the inertia force of the rotating part, leading to a stopped state (t≧t 5 ).
上記において、水車ガイドベーン１１とポンプ
吐出弁２１の閉動作を同時に開始した場合、両者
の構造上および閉鎖方式の差異に起因してポンプ
吐出弁全閉時刻t5は第２図に示すように水車ガイ
ドベーン全閉時刻t4よりもかなり遅れることにな
る。このように水車ガイドベーン１１の全閉後も
ポンプ吐出弁２１が開いていると、鉄管内の水流
が水車方向からポンプ方向に急激に変化すること
による異常な水圧変動の発生や主機の回転数の低
下の程度によつてはポンプ側が逆流運転状態とな
つて主機に異常振動を発生させる等の問題が生
じ、機器全体に少なからず悪影響を及ぼすことに
なる。 In the above, when the closing operations of the water turbine guide vane 11 and the pump discharge valve 21 are started at the same time, the pump discharge valve fully closing time t 5 is as shown in Fig. 2 due to the difference in structure and closing method between the two. This will be much later than the water turbine guide vane fully closing time t4 . If the pump discharge valve 21 remains open even after the turbine guide vane 11 is fully closed, the water flow in the iron pipe will suddenly change from the direction of the turbine to the direction of the pump, resulting in abnormal water pressure fluctuations and the rotation speed of the main engine. Depending on the extent of the decrease, problems such as reverse flow operation may occur on the pump side and abnormal vibrations may occur in the main engine, which may have a considerable negative impact on the entire equipment.
本発明は従来の運転制御方式における上述の如
き不都合を除去すべくなされたもので、揚水運転
より停止状態に至る過程の中で、主機を系統より
解列した後、水車ガイドベーンの閉鎖時期をポン
プ吐出弁の全開全閉間のある設定開度に基いて決
定し、水車ガイドベーンとポンプ吐出弁の全閉時
期を一致させるようにしたタンデム式揚水発電所
の運転制御方法を提供することを目的とするもの
である。 The present invention was made to eliminate the above-mentioned inconveniences in conventional operation control systems.In the process from pumping operation to stoppage, after the main engine is disconnected from the system, the closing timing of the turbine guide vanes is determined. An object of the present invention is to provide an operation control method for a tandem pumped storage power plant, which is determined based on a certain set opening degree between full open and full close of a pump discharge valve, and matches the full close timing of a water turbine guide vane and a pump discharge valve. This is the purpose.
本発明の方法において、揚水発電所を揚水運転
から停止へモード変換する場合、水車ガイドベー
ン１１を開いて水車を駆動させ、その発電出力分
を系統からの供給電力に置換して系統供給電力を
徐徐に低下させ、これが零になつた後、時刻ｔ＝
t3で主断路器CBを開き主機を系統から解列する
点では第２図に示す従来方法と同一である。 In the method of the present invention, when mode converting a pumped storage power plant from pumping operation to stoppage, the turbine guide vane 11 is opened to drive the turbine, and the generated output is replaced with power supplied from the grid to reduce the power supplied to the grid. It is gradually lowered and after this reaches zero, time t=
This method is the same as the conventional method shown in Figure 2 in that the main disconnector CB is opened at t 3 and the main engine is disconnected from the grid.
本発明の特徴部分は第２図の時刻t3からt5に至
る過程において、水車ガイドベーンを閉鎖する時
期を、ポンプ吐出弁の閉鎖開始時期より遅らせる
点にありそのため、第１図に示すように、ポンプ
吐出弁に開度検出器２３を設けている。この開度
検出器により、ポンプ吐出弁開度DVが設定開度
（第３図のDV0）に達したことを検出すると、そ
の時刻t′4から水車ガイドベーン閉鎖動作を開始
させるようにすれば、第３図に示すようにガイド
ベーンとポンプ吐出弁の閉鎖完了時点t5を一致さ
せることができる。なお、上記において、水車ガ
イドベーンとポンプ吐出弁の閉鎖はほぼ直線的に
行なわれるから、吐出弁設定開度DV0の値は両弁
の全開―全閉時間の比較により簡単な計算によつ
て求められる。 The characteristic part of the present invention is that in the process from time t 3 to time t 5 in FIG. 2, the timing to close the water turbine guide vane is delayed from the timing to start closing the pump discharge valve. In addition, an opening degree detector 23 is provided on the pump discharge valve. When this opening detector detects that the pump discharge valve opening DV has reached the set opening (DV 0 in Figure 3), the turbine guide vane closing operation is started from that time t'4 . For example, as shown in FIG. 3, the closing completion time t5 of the guide vane and the pump discharge valve can be made to coincide with each other. In the above, since the turbine guide vane and pump discharge valve close almost linearly, the value of the discharge valve setting opening DV 0 can be determined by simple calculation by comparing the fully open and fully closed times of both valves. Desired.
吐出弁設定開度DV0を検出して水車ガイドベー
ンを閉鎖させる電気回路の一例は第４図のように
構成することができる。同図において、３０は主
断器が解列された際に閉路する主断路器接点であ
り、３１はポンプ吐出弁接点で、ポンプ吐出弁の
閉動作指令によつて閉路する。また、３２は吐出
弁が設定開度DV0以下になると閉路する吐出弁開
度検出器の接点である。これらの接点３０，３
１，３２は水車ガイドベーン閉動作用継電器３３
と共に直列に電源線３４ａ，３４ｂ間に接続され
ており、従つて上記全ての接点３０，３１，３２
が閉じることによつて水車ガイドベーンは閉動作
を開始する。このように、本発明によれば適度の
時間遅れをもつて水車ガイドベーンを閉動作させ
ることにより、その全閉時点とポンプ吐出弁の全
閉時点を一致させることができ、従来の方法で問
題とされていた主機の異常振動や鉄管の過渡的水
圧現象の発生を防止することができ、主機を安定
した状態で揚水運転モードから停止モードへ移行
させることができる。 An example of an electric circuit for detecting the discharge valve setting opening degree DV 0 and closing the water turbine guide vane can be configured as shown in FIG. 4. In the figure, 30 is a main disconnector contact that closes when the main disconnector is disconnected, and 31 is a pump discharge valve contact, which is closed by a pump discharge valve closing operation command. Further, 32 is a contact point of a discharge valve opening detector which closes when the discharge valve becomes less than the set opening DV 0 . These contacts 30,3
1 and 32 are relays 33 for closing the water turbine guide vanes.
are connected in series between the power lines 34a and 34b, and therefore all the contacts 30, 31, 32
By closing, the water turbine guide vane starts a closing operation. As described above, according to the present invention, by closing the water turbine guide vane with an appropriate time delay, it is possible to match the point in time when the guide vane is fully closed and the point in time when the pump discharge valve is fully closed. It is possible to prevent the occurrence of abnormal vibrations in the main engine and transient water pressure phenomena in iron pipes, which were considered to be harmful, and it is possible to shift the main engine from pumping operation mode to stop mode in a stable state.
なお、上記実施例は変落差が少なく、水車ガイ
ドベーン開度が100％でポンプ軸入力と釣合う場
合には安価で有効な方法であるが、変落差の大き
な揚水発電所の場合に好適する実施例を以下に述
べる。 The above embodiment is an inexpensive and effective method when the fluctuation head is small and the hydraulic turbine guide vane opening is 100% to balance the pump shaft input, but it is suitable for pumped storage power plants with a large fluctuation head. Examples are described below.
第５図は変落差の大きな発電所において、ポン
プ吐出弁と水車ガイドベーン開度が夫々100％の
場合の水車出力PTおよびポンプ軸入力PPの変化
の様子を示す。この図から明らかなように、最低
落差Hnioで両者がP0で釣合つて運転されるとする
と、最高落差Hnaxでは両者の間にかなりの差が
生ずる。これは一般にポンプ特性は落差が高いと
流量が減少して軸入力PPが減少するに対し、水
車特性は落差の3/2乗にほぼ比例して出力が増加
することによる。従つて最高落差時にはポンプ軸
入力に見合う水車出力を発生するよう水車ガイド
ベーン開度を絞つて運転することになるが、その
場合、前述の吐出弁設定値を固定しておくと、落
差の変動によつて吐出弁と水車ガイドベーンの全
閉時期にずれを生ずることがある。 Figure 5 shows how the water turbine output P T and pump shaft input P P change when the pump discharge valve and water turbine guide vane openings are each 100% in a power plant with a large variable head. As is clear from this figure, if both are operated in balance at P 0 at the lowest head H nio , there is a considerable difference between the two at the highest head H nax . This is because, in general, pump characteristics are such that when the head is high, the flow rate decreases and the shaft input P P decreases, whereas the water turbine characteristics are such that the output increases approximately in proportion to the 3/2 power of the head. Therefore, when the head is at its maximum, the turbine guide vane opening degree must be reduced to generate the turbine output commensurate with the pump shaft input. This may cause a lag in the timing of full closing of the discharge valve and the turbine guide vane.
第６図に示す実施例において、GVはポンプ軸
入力に釣合う水車出力を出す水車ガイドベーン開
度を示す。これをポテンシヨメータ等から成る変
換器４０により電圧VGに変換する。ポンプ吐出
弁開度DVも同様に変換器４１を通して電圧VDに
変換する。比較器４２はGV＝100％に対する電
圧VGOと、ポンプ吐出弁開度設定値（GV＝100％
のときに水車ガイドベーンとポンプ吐出弁の閉鎖
時刻を一致させる開度）に対する電圧VDOとが一
致するように設定されており、第７図に示すごと
くVGとVDが比例関係にあるようにしてある。従
つて、任意のガイドベン開度に対する電圧VGに
対するポンプ吐出弁設定開度VDが比較器によつ
て決まる故、第６図に示す変換器４０，４１から
の出力VG，VDをこの比較器４２に入力すること
によりVD―VG≦０の条件でポンプ吐出弁設定開
度値が決まる。それ故、比較器４２の出力が零ま
た負の値となることを検出器４３により検出して
水車ガイドベーンを閉鎖する。このようにすれ
ば、GV＜100％の場合（落差が大きい場合）、
GVがGV＝100％のときのVG値より小さくなるか
ら、比較器４２によつて自動的にポンプ吐出弁設
定開度も小さくなり、いかなる変落差運転におい
ても水車ガイドベーンとポンプ吐出弁の全閉位置
を一致させることができる。 In the embodiment shown in FIG. 6, GV indicates the opening degree of the turbine guide vane that provides the turbine output that is commensurate with the pump shaft input. This is converted into a voltage V G by a converter 40 consisting of a potentiometer or the like. The pump discharge valve opening degree DV is similarly converted into a voltage V D through the converter 41. The comparator 42 compares the voltage V GO with respect to GV = 100% and the pump discharge valve opening setting value (GV = 100%
It is set so that the voltage V DO matches the opening degree that matches the closing time of the turbine guide vane and pump discharge valve when , and as shown in Figure 7, V G and V D are in a proportional relationship. It's like this. Therefore, since the pump discharge valve set opening V D with respect to the voltage V G for any guide vent opening is determined by the comparator, the outputs V G and V D from the converters 40 and 41 shown in FIG. By inputting to this comparator 42, the pump discharge valve setting opening value is determined under the condition that V D −V G ≦0. Therefore, when the detector 43 detects that the output of the comparator 42 becomes zero or a negative value, the water turbine guide vane is closed. In this way, if GV<100% (if the head is large),
Since the GV is smaller than the V G value when GV = 100%, the comparator 42 automatically reduces the set opening of the pump discharge valve, so that the flow rate between the turbine guide vane and the pump discharge valve is reduced in any variable head operation. Fully closed positions can be matched.
このように本発明によれば、変落差の場合にお
いても揚水運転から停止状態へスムーズに移行さ
せることができる。 As described above, according to the present invention, even in the case of variable head, it is possible to smoothly transition from pumping operation to stopped state.
第１図はタンデム式揚水発電所の要部を概念的
に示す横断面図、第２図は従来方法によつて揚水
運転から停止状態に至る間の運転モードを示す状
態図、第３図は本発明方法における運転モードの
要部を示す状態図、第４図は本発明の方法におい
て使用される装置の回路図、第５図はタンデム式
揚水発電所の変落差特性図、第６図は本発明の変
形例を示す制御図、第７図は出力VGとVDとの関
係を示す線図である。
１…水車、２…ポンプ、１１…ガイドベーン、
１２…ランナ、２１…吐出弁、２２…インペラ、
２３…開度検出器、３０…主断路器接点、３１…
ポンプ吐出弁接点、３２…吐出弁開度検出器の接
点、３３…ガイドベーン閉動作用継電器、４０…
変換器、４１…変換器、４２…比較器、４３…検
出器、GV…水車ガイドベーン開度、Pt…水車出
力、DV…ポンプ吐出弁開度、P2…系統供給電
力、CB…主断路器。
Fig. 1 is a cross-sectional view conceptually showing the main parts of a tandem pumped storage power plant, Fig. 2 is a state diagram showing the operation mode from pumping operation to stop state by the conventional method, and Fig. 3 is Figure 4 is a state diagram showing the main parts of the operation mode in the method of the present invention, Figure 4 is a circuit diagram of the equipment used in the method of the present invention, Figure 5 is a fluctuation head characteristic diagram of a tandem pumped storage power plant, and Figure 6 is FIG. 7, a control diagram showing a modification of the present invention, is a diagram showing the relationship between the outputs V G and V D. 1... Water wheel, 2... Pump, 11... Guide vane,
12...Runner, 21...Discharge valve, 22...Impeller,
23...Opening degree detector, 30...Main disconnector contact, 31...
Pump discharge valve contact, 32... Contact of discharge valve opening detector, 33... Relay for guide vane closing operation, 40...
Converter, 41... Converter, 42... Comparator, 43... Detector, GV... Turbine guide vane opening, P t ... Water turbine output, DV... Pump discharge valve opening, P 2 ... Grid supply power, CB... Main Disconnector.
Claims (1)
水発電所において、系統から電力供給を受けて揚
水運転を行なつている主機を停止状態に移行させ
る場合、水車を発電運転することによりポンプ運
転に必要な電力を系統から水車出力に徐々に切替
え、系統入力が零の状態で主機を系統から切離す
過程において、先ず、ポンプ吐出弁を閉動作さ
せ、その開度が設定開度に達した後、水車ガイド
ベーンを閉動作させることを特徴とする運転制御
方法。 ２ 水車ガイドベーン開度を示す電圧VGと、ポ
ンプ吐出弁開度を示す電圧VDとを、水車ガイド
ベーン開度100％時の電圧とポンプ吐出弁設定開
度時の電圧が一致するよう設定した比較器にイン
プツトし、VD―VG０を条件として水車ガイド
ベーンを閉鎖させるようにしたことを特徴とする
特許請求の範囲第１項記載の運転制御方法。[Scope of Claims] 1. In a tandem pumped storage power plant in which a water turbine and a pump are coaxially connected, when the main engine that receives power supply from the grid and performs pumping operation is brought to a halt state, the water turbine is operated to generate electricity. In this process, the power required for pump operation is gradually switched from the grid to the turbine output, and in the process of disconnecting the main engine from the grid when the grid input is zero, the pump discharge valve is first closed, and its opening is adjusted to the set opening. An operation control method characterized by operating a water turbine guide vane in a closing operation after reaching a certain temperature. 2. Voltage V G indicating the opening of the turbine guide vane and voltage V D indicating the opening of the pump discharge valve are adjusted so that the voltage at 100% opening of the turbine guide vane and the voltage at the set opening of the pump discharge valve match. 2. The operation control method according to claim 1, wherein the input is made to a set comparator to close the water turbine guide vane under the condition of V D -V G 0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5148880A JPS56148684A (en) | 1980-04-18 | 1980-04-18 | Controlling method for operation of tandem type pumping-up power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5148880A JPS56148684A (en) | 1980-04-18 | 1980-04-18 | Controlling method for operation of tandem type pumping-up power station |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56148684A JPS56148684A (en) | 1981-11-18 |
| JPS6323389B2 true JPS6323389B2 (en) | 1988-05-16 |
Family
ID=12888345
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5148880A Granted JPS56148684A (en) | 1980-04-18 | 1980-04-18 | Controlling method for operation of tandem type pumping-up power station |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56148684A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112983727B (en) * | 2021-02-09 | 2022-07-19 | 中国长江电力股份有限公司 | Oil pump state conversion process control method for hydraulic control system of hydraulic turbine speed regulator |
-
1980
- 1980-04-18 JP JP5148880A patent/JPS56148684A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56148684A (en) | 1981-11-18 |
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