JPS63113181A - Operation control method at pumped storage power station shutdown - Google Patents
Operation control method at pumped storage power station shutdownInfo
- Publication number
- JPS63113181A JPS63113181A JP61260407A JP26040786A JPS63113181A JP S63113181 A JPS63113181 A JP S63113181A JP 61260407 A JP61260407 A JP 61260407A JP 26040786 A JP26040786 A JP 26040786A JP S63113181 A JPS63113181 A JP S63113181A
- Authority
- JP
- Japan
- Prior art keywords
- pump
- operating machine
- pumping
- machine
- difference
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims description 15
- 238000005086 pumping Methods 0.000 claims abstract description 16
- 238000010248 power generation Methods 0.000 abstract description 4
- 101100491857 Columba livia ASL gene Proteins 0.000 abstract 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 48
- 230000001360 synchronised effect Effects 0.000 description 10
- 238000010586 diagram Methods 0.000 description 7
- 230000001052 transient effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002123 temporal 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)
Abstract
Description
【発明の詳細な説明】
〔発明の目的〕
(産業上の利用分野)
本発明は揚水発電所の運転制御方法に係り、特にその管
制下にポンプ水車またはポンプおよび水車を有する揚水
発電所における水力機械の停止時運転制御方法に関する
。[Detailed Description of the Invention] [Object of the Invention] (Industrial Field of Application) The present invention relates to a method for controlling the operation of a pumped storage power plant, and particularly relates to a method for controlling the operation of a pumped storage power plant, and particularly to a method for controlling the operation of a pumped storage power plant that has a pump turbine or a pump and a water turbine under its control. This invention relates to a method for controlling the operation of a machine when it is stopped.
(従来の技術)
分岐水路揚水発電所ではポンプ運転と水車運転とを同時
に行なうことが考えられている(特開昭6O−3048
1)が、その停止方法については、 今のところ制御
方法が発表されていない。(Prior art) It has been considered to perform pump operation and water turbine operation at the same time in a branch water pumped storage power plant (Japanese Patent Laid-Open No. 6O-3048
1) However, no control method has been announced so far regarding how to stop it.
発電運転を行なう同期発電機と揚水運転を行なう同期電
動機とを備えた揚水発電所における揚水運転の停止方法
として、従来のポンプのみの場合と同じ停止方法を使う
ことも考えられるが、この場合には、第6図(a)に例
示するように、ポンプ停止指令によりポンプガイドベー
ン開度1あるいは水車ガイドベーン開度2の閉動作を開
始し、前記ガイドベーンが予め設定した開度になった時
点T2で電動機を系統から解列し、水車ガイドベーンを
閉鎖させることになる。この場合、ポンプ回転数3と水
車回転数4は同図(b)に示すように変化し、ポンプ人
力5、水車出力6、ポンプと水車の入出力差7は同図(
c)のように変化し、時点T3にて水車は系統から解列
される。In a pumped storage power plant equipped with a synchronous generator that performs power generation operation and a synchronous motor that performs pumping operation, it is conceivable to use the same stopping method as in the case of only conventional pumps, but in this case, As illustrated in FIG. 6(a), the pump stop command starts the closing operation of the pump guide vane opening 1 or the water turbine guide vane opening 2, and the guide vane reaches the preset opening. At time T2, the electric motor is disconnected from the system and the water turbine guide vanes are closed. In this case, the pump rotation speed 3 and the water turbine rotation speed 4 change as shown in the same figure (b), and the pump human power 5, the water turbine output 6, and the input/output difference 7 between the pump and the water turbine change as shown in the figure (b).
c), and the water turbine is disconnected from the system at time T3.
このような制御においては同時に運転している同期電動
機と同期発電機とは無関係に運転制御している。In such control, operation is controlled regardless of the synchronous motor and synchronous generator that are operating at the same time.
(発明が解決しようとする問題点)
ところで、揚水発電所は電力系統の需給状態に応じて、
発電運転あるいは揚水運転を行い、電力の需給バランス
を保つことを目的として建設されている。従って、電力
系統の要求する出力あるいは入力に応じて運転すること
が必要である。(Problems to be solved by the invention) By the way, pumped storage power plants can
It is constructed for the purpose of maintaining the balance of electricity supply and demand by generating electricity or pumping water. Therefore, it is necessary to operate according to the output or input required by the power system.
揚水発電所を水車運転する場合には、ガイドベーン開度
を変化させることにより、容易に出力調整を行えるが、
ポンプ運転ではガイドベーン開度を変化させてもポンプ
水車およびポンプ本来の特性により、入力がほとんど変
化せず、電力系統の要求する入力に正確に応することが
できない。When operating a pumped storage power plant with a water turbine, the output can be easily adjusted by changing the guide vane opening.
During pump operation, even if the guide vane opening degree is changed, the input hardly changes due to the inherent characteristics of the pump-turbine and the pump, making it impossible to accurately respond to the input required by the power system.
すなわち、ポンプを停止する場合には系統から供給され
るポンプのほぼ最大人力値より制御を開始してガイドベ
ーンを閉動作し、ガイドベーン全開あるいは全開近傍の
前もって設定された開度でポンプの系統からの解列が行
なわれるため、系統へ与える影響が大きい。また、従来
の技術ではポンプ解列時点での揚水発電所の系統への入
出力差を制御できないという欠点があった。In other words, when stopping the pump, control is started from approximately the maximum human power value of the pump supplied from the system, the guide vane is closed, and the pump system is closed with the guide vane fully open or at a previously set opening close to fully open. Because disassembly is performed from the beginning, it has a large impact on the system. Furthermore, the conventional technology has the disadvantage that it is not possible to control the difference in input and output to the system of the pumped storage power plant at the time when the pumps are disconnected.
そこで本発明の目的は、系統への電力動揺を防止しなが
ら、水力機械の停止時の過渡的回転上昇を抑止し水圧鉄
管の水圧変動を最少限に抑えて水力機械を迅速かつ的確
に停止できるようにした停止時運転制御方法を提供する
ことにある。Therefore, the purpose of the present invention is to prevent power fluctuations in the grid, suppress transient rotational increases when hydraulic machines are stopped, minimize water pressure fluctuations in penstocks, and stop hydraulic machines quickly and accurately. An object of the present invention is to provide a method for controlling operation during stoppage.
(問題点を解決するための手段)
本発明は前記のような背景のもとで案出されたものであ
り、ポンプ水車またはポンプおよび水車をその管制下に
おく揚水発電所において、ポンプ水車またはポンプによ
る揚水運転と水車による発電運転を同時に並行して行な
っている運転状態から各機を停止する場合、前記揚水運
転機が系統から受電する電力と前記発電運転機が系統に
給電する電力の入出力差を緩かな変化で縮小させるよう
に前記揚水運転機および前記発電運転機のガイドベーン
開度を制御し、前記入出力差が系統容量に対して充分に
小さく、解列により系統に大きな電圧変動および周波数
変動を与えない範囲で、前もって定めた所定値に到達し
たところで前記揚水運転機と前記発電運転機を系統から
解列し、前記揚水運転機と前記発電運転機のガイドベー
ン開度を全開に至らしめることを特徴とするものである
。(Means for Solving the Problems) The present invention has been devised against the background as described above. When stopping each machine from an operating state in which pumping operation by the pump and power generation operation by the water turbine are performed in parallel, the pumping operation machine receives power from the grid, and the generator operation machine inputs the power supplied to the grid. The guide vane opening degrees of the pumping storage operating machine and the generating operating machine are controlled so as to reduce the output difference with gradual changes, and the input/output difference is sufficiently small relative to the system capacity, and the disconnection causes a large voltage to be applied to the grid. The pumping storage operating machine and the generating operating machine are disconnected from the system when a predetermined value is reached within a range that does not cause fluctuations or frequency fluctuations, and the guide vane openings of the pumping storage operating machine and the generating operating machine are adjusted. It is characterized by reaching full throttle.
(作 用)
上述のように構成した本発明方法によれば、任意に選択
された系統への入出力差にてポンプ水車あるいはポンプ
および水車を同時に運転し、この運転されているポンプ
水車あるいはポンプおよび水車を、系統への電力動揺を
防止しながら、かつ水力機械の停止時の過渡的回転上昇
を抑止し、水圧鉄管の水圧変動を最小限に押えて各水力
機械を停止する制御を迅速かつ適確に行なうことができ
る。(Function) According to the method of the present invention configured as described above, the pump-turbine or the pump and the water-turbine are simultaneously operated with the input/output difference to the arbitrarily selected system, and the pump-turbine or the pump being operated is The water turbines can be quickly controlled to stop each hydraulic machine by preventing power fluctuations to the grid, suppressing transient rotational increases when the hydraulic machines are stopped, and minimizing water pressure fluctuations in the penstock. Can be done accurately.
(実施例)
第1図は本発明による制御のシーケンスダイヤグラムの
一例を示す。(Embodiment) FIG. 1 shows an example of a sequence diagram of control according to the present invention.
ポンプ人力8と水車出力9はポンプ停止指令10と共に
演算装置11に人力される。ポンプ入力8と水車出力9
との入出力差12を第2図のように前もって設定してお
いた設定値ΔPと比較し、前記入出力差が一ΔP以下な
らば水車ガイドベーンを開動作13させる。また、入出
力差の絶対値がΔPより小さければ水車およびポンプを
系統より解列14すると共に、水車ガイドベーンを閉鎖
15する。The pump power 8 and the water turbine output 9 are input to the arithmetic unit 11 along with the pump stop command 10. Pump input 8 and water turbine output 9
The input/output difference 12 is compared with a preset value ΔP as shown in FIG. 2, and if the input/output difference is less than 1 ΔP, the water turbine guide vane is opened 13. Further, if the absolute value of the input/output difference is smaller than ΔP, the water turbine and the pump are disconnected from the system (14), and the water turbine guide vanes are closed (15).
一方、ポンプ停止指令10によりポンプガイドベーンは
閉動作16を開始する。これにより水車は停止17し、
ポンプも停止18する。On the other hand, in response to the pump stop command 10, the pump guide vane starts a closing operation 16. As a result, the water wheel stopped17,
The pump also stops 18.
第3図(a)〜(c)は本発明の制御におけるGV開度
、回転数、入・出力差の時間変化を示す。FIGS. 3(a) to 3(c) show temporal changes in the GV opening degree, rotation speed, and input/output difference in the control according to the present invention.
なお、入力出力差が△P以上のときは、水車のガイドベ
ーンは閉動作19する。Note that when the input/output difference is greater than or equal to ΔP, the guide vane of the water turbine performs a closing operation 19.
この図からも明らかなようにポンプおよび水車の系統か
らの解列時点で、上記ポンプ入力側と水車発電側が接続
されていれば、両機の回転数3゜4は同期しながら減速
する。なお、第4図中、20は水車、21はポンプ、2
2は同期発電機、23は同期電動機、24,25.26
.27゜28は開閉器を示す。As is clear from this figure, if the pump input side and the water turbine power generation side are connected when the pump and the water turbine are disconnected from the system, the rotational speeds of both machines will be decelerated synchronously. In addition, in Fig. 4, 20 is a water wheel, 21 is a pump, and 2
2 is a synchronous generator, 23 is a synchronous motor, 24, 25.26
.. 27°28 indicates a switch.
このような構成の本発明方法においては、第3図の時間
T2において開閉器27.28が開されてポンプ解列と
水車解列が行なわれた時、同期電動機23と同期発電機
22とが開閉器26により並列されていれば、両機は同
期しながら回転しており、第3図に示すように時間T2
以降、水車およびポンプのガイドベーンは閉鎖されるか
ら、前記ポンプおよび水車は同期しながら減速する。In the method of the present invention having such a configuration, when the switches 27 and 28 are opened at time T2 in FIG. 3 and the pumps and turbines are uncoupled, the synchronous motor 23 and the synchronous generator 22 are If they are connected in parallel by the switch 26, both machines will rotate synchronously, and as shown in FIG.
After that, the guide vanes of the water wheel and the pump are closed, so that the pump and the water wheel are decelerated synchronously.
また、第5図に例示するように、上池29から出た水圧
鉄管30の途中から分岐配管31. 32を分岐させ、
これらの分岐配管と下池33の間にポンプ34と水車3
5を設置し、これらのポンプ。Further, as illustrated in FIG. 5, a branch pipe 31. Branch 32,
A pump 34 and a water turbine 3 are installed between these branch pipes and the lower pond 33.
5. Install these pumps.
水車にそれぞれ発電機36と電動機37とを連結した。A generator 36 and an electric motor 37 were connected to each of the water turbines.
分岐水路揚水発電所において第3図のような停止制御を
行なうことにより水力機械の停止制御に伴う分岐管31
.32内の水圧上昇波38および水圧下降波39を重ね
合せることにより水圧鉄管30では水圧変化を小さくす
ることが可能となる。By performing the stop control as shown in Fig. 3 at the branch water pumped storage power plant, the branch pipe 31 due to the stop control of hydraulic machinery is
.. By superimposing the rising water pressure wave 38 and the falling water pressure wave 39 in the penstock 30, it becomes possible to reduce changes in water pressure in the penstock 30.
すなわち、上述のように、本発明の方法においては、第
3図のシーケンスダイヤグラムに示すように、時刻T1
においてポンプおよび水車の停止指令を受けると、ポン
プガイドベーン1は閉動作を開始する。このとき入出力
差は一△Pより小さいので水車ガイドベーン2は開動作
をする。That is, as described above, in the method of the present invention, as shown in the sequence diagram of FIG.
When a command to stop the pump and water turbine is received at , the pump guide vane 1 starts a closing operation. At this time, since the input/output difference is smaller than 1 ΔP, the water turbine guide vane 2 performs an opening operation.
一方、ポンプと水車とは並列され、さらに両機は系統に
並列されているので、それらの回転数3゜4は時間T2
まで一定である。On the other hand, since the pump and the water turbine are connected in parallel, and both machines are connected in parallel to the system, their rotation speed of 3°4 is the same as the time T2.
It remains constant until
ポンプガイドベーンの閉1、ポンプガイドベーンの開2
により入出力差は速やかにゼロになる。Pump guide vane closing 1, pump guide vane opening 2
Therefore, the input/output difference quickly becomes zero.
ここで両機を解列しても系統への影響はほぼ無視できる
値になっている。一方、分岐した水圧鉄管31および3
2の長さは一般にほぼ等しいと考えて差支えないから、
第5図に示すにガイドベーンの急閉鎖による過渡水圧変
化は水圧上昇波38と水圧低下波39として水圧鉄管3
0にほぼ同時に到達するので、水圧鉄管30内の圧力波
40の圧力変化は著しく小さくなっている。実際に水中
での音波の伝播速度は約1000m/sであり、分岐水
圧鉄管31.32の長さの差は1000mであっても、
分岐点への圧力波の伝達時間差が1 sec程度であり
、前記圧力波38.39の重ね合せによる水圧変化現象
の効果は十分に実現可能である。Even if both machines are disconnected at this point, the impact on the grid is almost negligible. On the other hand, the branched penstocks 31 and 3
It is safe to assume that the lengths of 2 are generally approximately equal, so
As shown in Fig. 5, the transient water pressure change caused by the sudden closure of the guide vane is caused by a water pressure rising wave 38 and a water pressure falling wave 39 on the penstock 3.
0 almost simultaneously, the pressure change in the pressure wave 40 inside the penstock 30 is significantly small. In reality, the propagation speed of sound waves underwater is about 1000 m/s, and even though the difference in length between the branch penstocks 31 and 32 is 1000 m,
The transmission time difference of the pressure waves to the branch point is about 1 sec, and the effect of the water pressure change phenomenon due to the superposition of the pressure waves 38 and 39 can be fully realized.
以上の如く、ポンプおよび水車は自由に設定した入出力
差から短時間で、系統へも影響を与えず、しかも回転数
も上昇させず、水圧変化も最小に押えた状態にて停止制
御を実施できる。As described above, pumps and water turbines are controlled to stop in a short time based on freely set input/output differences, without affecting the system, without increasing rotation speed, and with water pressure changes kept to a minimum. can.
第1図は本発明のシーケンスダイヤグラム、第2図は揚
水発電所の停止制御例、第3図は本発明はうほうあの作
動をしめずグラフ、第4図は本発明を適用する停止制御
例を例示するグラフ、第4図は電力系統図、第5図は分
岐水路揚水発電所を例示する系統図、第6図は水撃現象
説明図である。
は設定入出力差△pの説明図である。
1・・・ポンプガイドベーン開度、2・・・水車ガイド
ベー、20・・・水車、21・・・ポンプ、22・・・
同期発電機、23・・・同期電動機、24.25,26
゜27.28・・・開閉器、29・・・上池、30・・
・水圧鉄管、31.32・・・分岐水圧鉄管、33・・
・下池、34・・・水車、35・・・ポンプ、36・・
・電動機、37・・・発電機。Fig. 1 is a sequence diagram of the present invention, Fig. 2 is an example of stop control of a pumped storage power plant, Fig. 3 is a graph of the operation of the pump of the present invention, and Fig. 4 is an example of stop control to which the present invention is applied. 4 is a power system diagram, FIG. 5 is a system diagram illustrating a branch water pumped storage power plant, and FIG. 6 is an explanatory diagram of the water hammer phenomenon. is an explanatory diagram of the setting input/output difference Δp. 1... Pump guide vane opening degree, 2... Water wheel guide vane, 20... Water turbine, 21... Pump, 22...
Synchronous generator, 23...Synchronous motor, 24.25,26
゜27.28...Switch, 29...Kamiike, 30...
・Water penstock, 31. 32... Branch water penstock, 33...
・Lower pond, 34...Waterwheel, 35...Pump, 36...
・Electric motor, 37... Generator.
Claims (1)
おく揚水発電所において、ポンプ水車またはポンプによ
る揚水運転と水車による発電運転を同時に並行して行な
っている運転状態から各機を停止する場合、前記揚水運
転機が系統から受電する電力と前記発電運転機が系統に
給電する電力の入出力差を緩かな変化で縮小させるよう
に前記揚水運転機および前記発電運転機のガイドベーン
開度を制御し、前記入出力差が系統容量に対して充分に
小さく、解列により系統に大きな電圧変動および周波数
変動を与えない範囲で、前もって定めた所定値に到達し
たところで前記揚水運転機と前記発電運転機を系統から
解列し、前記揚水運転機と前記発電運転機のガイドベー
ン開度を全閉に至らしめることを特徴とする揚水発電所
の停止時運転制御方法。 2、揚水運転機と発電運転機を系統から解列した後に、
前記揚水運転機の電動機入力側と前記発電運転機の発電
機出力側とを接続することを特徴とする特許請求の範囲
第1項記載の揚水発電所の停止時運転制御方法。 3、揚水運転機と発電運転機を系統から解列する前に、
前記揚水運転機の電動機入力側と前記発電運転機の発電
機出力側とを接続することを特徴とする特許請求の範囲
第1項記載の揚水発電所の停止時運転制御方法。[Claims] 1. In a pumped-storage power plant in which a pump-turbine or a pump and a water-turbine are under its control, each machine is When stopping the pumping storage operating machine and the generating operating machine, guide the pumping storage operating machine and the generating operating machine so that the input/output difference between the power that the pumping storage operating machine receives from the grid and the power that the generating operating machine supplies to the grid is gradually reduced. The pumping operation is started when the vane opening degree is controlled and a predetermined value is reached, as long as the input/output difference is sufficiently small relative to the system capacity and the disconnection does not cause large voltage fluctuations and frequency fluctuations to the system. 1. A method for controlling the operation of a pumped storage power plant during stoppage, the method comprising disconnecting the pumping storage operating machine and the generating operating machine from the system, and fully closing the guide vane openings of the pumping storage operating machine and the generating operating machine. 2. After disconnecting the pumping storage operating machine and the generating operating machine from the grid,
2. The method for controlling the operation of a pumped storage power plant during stoppage according to claim 1, characterized in that the motor input side of the pumped storage operating machine and the generator output side of the generator operating machine are connected. 3. Before disconnecting the pumping storage operating machine and the generating operating machine from the grid,
2. The method for controlling the operation of a pumped storage power plant during stoppage according to claim 1, characterized in that the motor input side of the pumped storage operating machine and the generator output side of the generator operating machine are connected.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP61260407A JPS63113181A (en) | 1986-10-31 | 1986-10-31 | Operation control method at pumped storage power station shutdown |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP61260407A JPS63113181A (en) | 1986-10-31 | 1986-10-31 | Operation control method at pumped storage power station shutdown |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS63113181A true JPS63113181A (en) | 1988-05-18 |
Family
ID=17347490
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP61260407A Pending JPS63113181A (en) | 1986-10-31 | 1986-10-31 | Operation control method at pumped storage power station shutdown |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS63113181A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019171558A1 (en) * | 2018-03-08 | 2019-09-12 | 中国電力株式会社 | Pumped-storage power generation control system, pumped-storage power generation system, and method of controlling pumped-storage power generation |
-
1986
- 1986-10-31 JP JP61260407A patent/JPS63113181A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019171558A1 (en) * | 2018-03-08 | 2019-09-12 | 中国電力株式会社 | Pumped-storage power generation control system, pumped-storage power generation system, and method of controlling pumped-storage power generation |
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