JPH0450602B2 - - Google Patents
Info
- Publication number
- JPH0450602B2 JPH0450602B2 JP58084134A JP8413483A JPH0450602B2 JP H0450602 B2 JPH0450602 B2 JP H0450602B2 JP 58084134 A JP58084134 A JP 58084134A JP 8413483 A JP8413483 A JP 8413483A JP H0450602 B2 JPH0450602 B2 JP H0450602B2
- Authority
- JP
- Japan
- Prior art keywords
- water level
- signal
- head
- adder
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 139
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D9/00—Level control, e.g. controlling quantity of material stored in vessel
- G05D9/12—Level control, e.g. controlling quantity of material stored in vessel characterised by the use of electric means
-
- 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
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、水力発電所における上水槽の水位
を一定に保持して落差制限のある水車の安定な運
転を達成することができる水位調整装置に関す
る。[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a water level adjustment device that can maintain a constant water level in a water tank in a hydroelectric power plant and achieve stable operation of a water turbine with a limited head. Regarding.
従来、この種の水位調整装置としては、例えば
特開昭58−48108号公報に、調整池の水位および
サージタンクの水位に応じて水車のガイドベーン
を制御する水力発電所の水位調整装置であつて、
特に外乱発生時においても、サージタンク水位が
過度に上昇、下降することのない水位調整装置が
開示され、その第２図（以下公報第２図という）。
にこの従来の技術のブロツク図が示されている。
公報第２図から本発明に関係しない技術要素を省
いて簡潔に示したのが本願の第１図（以下単に第
１図というである。念のため、公報第２図と第１
図における技術要素の対比を説明すると、公報第
２図のHrefが第１図の水位設定器１０と、A1と
A2が加減算器１８に、C5、C6、S1及びS2が調節
器１２に、総合伝達関数（制御対象として負荷制
限器と調速機を一纒めにしたもの）B0が制御対
象としての負荷制限機１４に、ｎからA2への戻
りが水位調定率設定器１６に、それぞれ対応す
る。また、サージタンクは本発明に関係しないの
で公報第２図のHT＝Q1となり、これが第１図の
上水槽水位信号に対応している。本発明に関係し
ない水位検出系及び水理系を模擬した伝達関数要
素は第１図には記載していない。すなわち、第１
図において、参照符号１０は上水槽の水位設定
器、１２は調節器、１４は負荷制限器、１６は水
位調定率設定器、１８は第１加減算器をそれぞれ
示す。このように構成された水位調整装置におい
ては、水位設定器１０で設定した設定値信号を第
１加減算器１８に入力すると共に前記設定値信号
に対する比較信号として上水槽水位信号を前記第
１加減器１８に入力して減算を行つて偏差を求
め、この偏差値の正負に応じて調節器１２を介し
て負荷制限器１４に対し閉信号または開信号を与
える。また、負荷制限器１４またはガイドベーン
の開度信号を水位調定率設定器１６に入力して所
定の係数を掛算し、得られた信号を前記第１加減
算器１８へ水位設定器１０で得られる設定値信号
と同極性で入力することにより、この種の水位調
整装置に水位調定機能を保持させることができ
る。
Conventionally, this type of water level adjusting device is disclosed in Japanese Patent Application Laid-Open No. 58-48108, which describes a water level adjusting device for a hydroelectric power plant that controls the guide vanes of a water turbine according to the water level of a regulating pond and the water level of a surge tank. hand,
In particular, a water level adjustment device that prevents the surge tank water level from rising or falling excessively even when a disturbance occurs is disclosed, and FIG. 2 thereof (hereinafter referred to as FIG. 2 of the publication).
A block diagram of this prior art is shown in FIG.
Figure 1 of the present application (hereinafter simply referred to as Figure 1) is a concise illustration of Figure 2 of the publication by omitting technical elements unrelated to the present invention.
To explain the comparison of technical elements in the figures, H ref in Figure 2 of the publication is the same as the water level setter 10 in Figure 1 and A 1 .
A 2 is sent to the adder/subtractor 18, C 5 , C 6 , S 1 and S 2 are sent to the regulator 12, and the overall transfer function (which combines the load limiter and speed governor as control objects) B 0 is sent to the adder/subtractor 18. The return from n to A 2 corresponds to the load limiter 14 as a controlled object, and the water level adjustment rate setting device 16 corresponds to the return from n to A 2 , respectively. Furthermore, since the surge tank is not related to the present invention, H T =Q 1 in FIG. 2 of the publication, which corresponds to the water tank water level signal in FIG. 1. Transfer function elements simulating a water level detection system and a hydraulic system that are not related to the present invention are not shown in FIG. That is, the first
In the figure, reference numeral 10 indicates a water tank water level setting device, 12 a regulator, 14 a load limiter, 16 a water level adjustment rate setting device, and 18 a first adder/subtractor, respectively. In the water level adjusting device configured as described above, the set value signal set by the water level setter 10 is input to the first adder/subtractor 18, and the water tank water level signal is input to the first adder/subtractor 18 as a comparison signal with respect to the set value signal. 18 and performs subtraction to obtain a deviation, and a close signal or an open signal is given to the load limiter 14 via the regulator 12 depending on whether the deviation value is positive or negative. Further, the opening degree signal of the load limiter 14 or the guide vane is input to the water level adjustment rate setting device 16 and multiplied by a predetermined coefficient, and the obtained signal is sent to the first adder/subtractor 18 and obtained by the water level setting device 10. By inputting the signal with the same polarity as the set value signal, this type of water level adjustment device can maintain the water level adjustment function.
しかしながら、このように構成された従来の水
位調整装置おいては、上水槽と放水庭（下池）と
の水位によつて定まる落差（有効落差または総落
差）を演算および監視する機能を備えていないた
め、水車の運転範囲に上限または下限の落差制限
のある発電所において上水槽の水位一定運転を行
うと、放水庭（下池）の水位によつては落差が水
車の制限落差を上まわり（または下まわり）、水
車に弊害を及ぼす水位となる惧れを伴う難点があ
る。
However, the conventional water level adjustment device configured in this way does not have a function to calculate and monitor the head difference (effective head or total head) determined by the water level between the upper water tank and the water discharge garden (lower pond). Therefore, if the upper water tank is operated at a constant water level at a power plant where the upper or lower head is restricted to the operating range of the water turbine, the head may exceed the water turbine's limited head (or The problem is that the water level may be harmful to the water turbine.
本発明は上記の点に鑑みてなされたものであつ
て、その目的は、水車に対する上水槽水と放水庭
との落差を演算および監視する機能を保持し、水
車の制限落差に応じて上水槽水位を制御する水位
調整装置を提供するにある。 The present invention has been made in view of the above points, and its purpose is to maintain the function of calculating and monitoring the head difference between the water tank water and the water garden with respect to the water wheel, and to adjust the water tank water to the water tank according to the limit head of the water wheel. The present invention provides a water level adjustment device for controlling water level.
上記目的を達成するために本発明においては、
水位設定器で設定した水位の設定値信号と上水
槽の水位信号との偏差を演算する第１加減算器１
８を有し、前記偏差の正負により負荷制限器の開
閉信号を得るよう構成した水力発電所の水位調整
装置において、
水位設定器１０で設定した設定値信号と放水庭
の水位信号との偏差から落差を演算する第２加減
算器２０と、
この第２加減算器で算出される偏差信号を、水
車の許容する上限落差および下限落差をそれぞれ
設定する上限落差設定器２４および下限落差設定
器２６の各設定信号と比較して、第２加減算器の
偏差信号の値が上限落差を上回るかまたは下限落
差を下回つている場合に、その比較結果に応じた
信号を出力する比較演算器２８と、
この比較演算器の出力と前記水位設定器の設定
値信号とを加減演算する第３加減算器２２と、を
設け、
この第３加減算器の出力を実際の水位設定値と
して、上水槽の水位信号との偏差を演算する第１
加減算器１８に入力するように構成した。
In order to achieve the above object, the present invention provides a first adder/subtracter 1 that calculates the deviation between the water level set value signal set by the water level setting device and the water level signal of the water tank.
8, and is configured to obtain an opening/closing signal for a load limiter depending on the positive or negative of the deviation, from the deviation between the set value signal set by the water level setting device 10 and the water level signal in the water garden. A second adder/subtractor 20 that calculates the head, and an upper limit head setter 24 and a lower limit head setter 26 that respectively set the upper limit head and lower limit head allowable by the water turbine, respectively, using the deviation signal calculated by the second adder/subtractor. a comparison calculator 28 that outputs a signal according to the comparison result when the value of the deviation signal of the second adder/subtractor exceeds the upper limit head or falls below the lower limit head when compared with the set signal; A third adder/subtractor 22 is provided for adding and subtracting the output of the comparator and the set value signal of the water level setting device, and the output of the third adder/subtracter is used as the actual water level set value and is used as the water level signal of the water tank. The first step is to calculate the deviation of
The configuration is such that it is input to an adder/subtractor 18.
なお、第２加減算器に入力され水位設定器で設
定した設定値信号と偏差を演算する信号を、放水
庭の水位信号と損失水頭の補正信号とからなるも
のとしてもよい。 Note that the signal input to the second adder/subtracter and used to calculate the deviation from the set value signal set by the water level setter may be composed of a water level signal of the water garden and a head loss correction signal.
上記の技術手段により、水位設定器で設定した
設定信号から放水庭の水位信号および必要に応じ
て損失水頭の補正信号を減算して総落差ないしは
有効落差を算出し、この落差の水車に許容される
上限落差および下限落差とを比較して得られた偏
差を前記水位設定器の水位設定値から減算して、
実際の水位設定値を算出することにより、すなわ
ち、落差が上限落差を上回る場合には、その分だ
け、水位設定器で設定した設定値信号より低い値
の水位設定信号によつて、上水槽水位を低める方
向に、また、落差が下限落差を下回る場合には、
その分だけ、水位設定器で設定した設定値信号よ
り高い値の水位設定信号によつて、上水槽水位を
高める方向に、それぞれ制御することにより、上
水槽の水位調整を水車の運転許容落差範囲内で安
定に実現することができる。
Using the above technical means, the total head or effective head is calculated by subtracting the tailwater water level signal and, if necessary, the head loss correction signal from the setting signal set by the water level setting device. Subtract the deviation obtained by comparing the upper limit head and lower limit head from the water level set value of the water level setting device,
By calculating the actual water level set value, that is, if the head exceeds the upper limit head, the water tank water level is adjusted by a water level setting signal that is lower than the set value signal set by the water level setting device. In the direction of lowering the head, and if the head is less than the lower limit head,
By controlling the upper water tank water level in the direction of increasing the water level setting signal with a higher value than the set value signal set by the water level setting device, the water level of the upper water tank can be adjusted within the permissible operating head range of the water turbine. This can be achieved stably within
次に、本発明に係る水力発電所の水位調整装置
の実施例につき添付図面を参照しながら以下詳細
に説明する。
Next, embodiments of the water level adjustment device for a hydroelectric power plant according to the present invention will be described in detail below with reference to the accompanying drawings.
第２図は、本発明の水位調整装置の一実施例を
示すブロツク回路図である。なお、説明の便宜上
第１図に示す従来の回路構成と同一の構成部分に
ついては同一の参照符号を付して詳細な説明は省
略する。すなわち、本発明において、水位設定器
１０で得られる設定値信号を同時に第２加減算器
２０と第３加減算器２２とに入力するよう構成
し、第２加減算器２０は放水庭（下池）水位信号
および損失水頭補正信号を入力して前記設定値信
号との偏差を演算するよう構成し、また第３加減
算器２２は第２加減算器２０で得られた偏差信号
と上限落差設定器２４および下限落差設定器２６
で設定された設定値信号とを比較演算器２８で比
較演算されて得られた偏差信号を入力して水位設
定器１０からの設定値信号との偏差を演算するよ
う構成し、この第３加減算器の出力によつて実際
の水位設定値信号を得るように水位調整装置を構
成した。 FIG. 2 is a block circuit diagram showing one embodiment of the water level adjusting device of the present invention. For convenience of explanation, the same reference numerals are given to the same components as in the conventional circuit configuration shown in FIG. 1, and detailed explanation will be omitted. That is, in the present invention, the set value signal obtained by the water level setting device 10 is configured to be simultaneously input to the second adder/subtractor 20 and the third adder/subtractor 22, and the second adder/subtractor 20 receives the water level signal from the water garden (lower pond). and head loss correction signal are input to calculate the deviation from the set value signal, and the third adder/subtracter 22 uses the deviation signal obtained by the second adder/subtracter 20 and the upper limit head setter 24 and the lower limit head. Setting device 26
The device is configured to input the deviation signal obtained by comparing and calculating the set value signal set by the comparator 28 with the set value signal set by the water level setting device 10, and calculate the deviation with the set value signal from the water level setting device 10. The water level adjustment device was configured so that the actual water level set value signal was obtained from the output of the device.
従つて、本実施例回路においては、第３加減算
器２２で得られた偏差信号を、従来の水位調整装
置と同様に、上水槽水位信号との偏差を求める第
１加減算器１８に入力し、この第１加減算器１８
で得られる信号に応じて調節器１２を介して負荷
制限器１４の開閉制御を行うと共に水位調定率設
定器１６を設けて水位調定機能を保持させるよう
構成する。 Therefore, in the circuit of this embodiment, the deviation signal obtained by the third adder/subtracter 22 is input to the first adder/subtracter 18 for calculating the deviation from the water tank water level signal, as in the conventional water level adjustment device. This first adder/subtractor 18
The opening/closing control of the load limiter 14 is performed via the regulator 12 in accordance with the signal obtained by the controller 12, and a water level adjustment rate setting device 16 is provided to maintain the water level adjustment function.
次に、前記構成からなる本発明に係る水位調整
装置の作用につき説明する。 Next, the operation of the water level adjusting device according to the present invention having the above configuration will be explained.
まず、第２加減算器２０において、水位設定器
１０からの設定値信号から放水庭（下池）水位信
号および必要に応じて損失水頭補正信号を減算し
て偏差信号を得る。この偏差信号は総落差もしく
は有効落差を表わしている。次いで、このように
して得られた偏差信号を比較演算器２８に入力
し、ここで上限落差設定器２４および下限落差設
定器２６で設定された設定値信号と比較演算を行
う。この場合、比較演算器２８では、前記偏差
（有効落差）が上限値（上限落差）を上まわつた
場合には上まわつた分の正信号を出力し、また前
記偏差（有効落差）が下限値（下限落差）を下ま
わつた場合には下まわつた分の負信号を出力され
る。そして、第３加減算器２２において、水位設
定器１０からの設定値信号から比較演算器２８よ
り出力される信号を減算することにより、実際の
水位設定値信号を得ることができる。このように
して得られる実際の水位設定値信号との落差との
関係を示せば第３図の通りである。 First, the second adder/subtractor 20 subtracts the water garden (lower pond) water level signal and, if necessary, the head loss correction signal from the set value signal from the water level setter 10 to obtain a deviation signal. This deviation signal represents the total head or effective head. Next, the deviation signal obtained in this manner is input to the comparison calculator 28, where it is compared with the set value signal set by the upper limit head setter 24 and the lower limit head setter 26. In this case, the comparator 28 outputs a positive signal corresponding to the exceeded value when the deviation (effective head) exceeds the upper limit value (upper limit value), and also outputs a positive signal corresponding to the excess value when the deviation (effective head) exceeds the lower limit value. (lower limit head difference), a negative signal corresponding to the amount below is output. Then, the third adder/subtractor 22 subtracts the signal output from the comparator 28 from the set value signal from the water level setter 10, thereby obtaining an actual water level set value signal. The relationship between the actual water level set value signal obtained in this manner and the head difference is shown in FIG. 3.
すなわち、第３図から明らかなように、第２加
減算器２０で得られる有効落差が、上限落差を上
まわる場合には実際の水位設定値は水位設定器１
０の設定値よりも低減し、また下限落差を下まわ
る場合には実際の水位設定値は水位設定器１０の
設定値よりも増大する。 That is, as is clear from FIG. 3, when the effective head obtained by the second adder/subtractor 20 exceeds the upper limit head, the actual water level setting value is determined by the water level setting device 1.
When the water level decreases below the set value of 0 and also falls below the lower limit head, the actual water level set value increases more than the set value of the water level setting device 10.
このようにして得られた実際の水位設定値信号
は、従来の水位調整装置と同様に、第１加減算器
１８に対し上水槽水位信号と共に入力してその偏
差を求め、得られた偏差信号の正負に応じて調節
器１２を介して負荷制限器１４に対し開閉制御信
号を供給し、上水槽の水位一定制御を達成するこ
とができる。 The actual water level set value signal obtained in this way is input to the first adder/subtracter 18 together with the water tank water level signal to determine the deviation, and the deviation signal obtained is By supplying an opening/closing control signal to the load limiter 14 via the regulator 12 depending on whether it is positive or negative, it is possible to achieve constant water level control of the water tank.
以上説明したように、本発明によれば、水位設
定器により設定した水位設定値信号に対し、放水
庭（下池）水位信号および必要に応じて損失水頭
補正信号を入力することにより、有効落差の演算
すなわち落差の監視機能を有し、水車の運転許容
落差を設定してこの許容落差範囲内に落差を調整
し得るよう上水槽の水位制御を達成することがで
きる。
As explained above, according to the present invention, the effective head can be calculated by inputting the tailwater garden (lower pond) water level signal and, if necessary, the head loss correction signal to the water level setting value signal set by the water level setting device. It has a calculation, that is, a head monitoring function, and can control the water level of the water tank so that the operational allowable head of the water turbine can be set and the head can be adjusted within this allowable head range.
従つて、本発明装置によれば、従来の水位調整
装置に簡単な加減算回路を付加するだけで水車に
有害な落差での運転を自動的に回避することがで
きる。 Therefore, according to the device of the present invention, operation at a head that is harmful to a water turbine can be automatically avoided by simply adding a simple addition/subtraction circuit to a conventional water level adjusting device.
第１図は従来の水力発電所の水位調整装置の基
本構成を示すブロツク回路図、第２図は本発明に
係る水位調整装置の一実施例を示すブロツク回路
図、第３図は第２図に示す水位調整装置における
上限落差と下限落差に対する水位設定値の調整作
用を示す動作特性線図である。
１０……水位設定器、１２……調節器、１４…
…負荷制限器、１６……水位調定率設定器、１８
……第１加減算器、２０……第２加減算器、２２
……第３加減算器、２４……上限落差設定器、２
６……下限落差設定器、２８……比較演算器。
FIG. 1 is a block circuit diagram showing the basic configuration of a conventional water level adjustment device for a hydroelectric power plant, FIG. 2 is a block circuit diagram showing an embodiment of the water level adjustment device according to the present invention, and FIG. It is an operation characteristic diagram showing the adjustment effect of the water level setting value with respect to the upper limit head and the lower limit head in the water level adjusting device shown in FIG. 10...Water level setter, 12...Adjuster, 14...
...Load limiter, 16...Water level adjustment rate setting device, 18
...First adder/subtractor, 20...Second adder/subtractor, 22
...Third adder/subtractor, 24... Upper limit head setter, 2
6... Lower limit head setter, 28... Comparison calculator.
Claims (1)
水槽の水位信号との偏差を演算する第１加減算器
１８を有し、前記偏差の正負により負荷制限器の
開閉信号を得るよう構成した水力発電所の水位調
整装置において、 水位設定器１０で設定した設定値信号と放水庭
の水位信号との偏差から落差を演算する第２加減
算器２０と、 該第２加減算器で算出される偏差信号を、水車
の許容する上限落差および下限落差をそれぞれ設
定する上限落差設定器２４および下限落差設定器
２６の各設定値信号と比較して、第２加減算器の
前記偏差信号の値が前記上限落差を上回るかまた
は前記下限落差を下回つている場合に、その比較
結果に応じた信号を出力する比較演算器２８と、 該比較演算器の出力と前記水位設定器の設定値
信号とを加減演算する第３加減算器２２と、 を設け、 該第３加減算器の出力を実際の水位設定値とし
て、上水槽の水位信号との偏差を演算する前記第
１加減算器１８に入力するよう構成した、 ことを特徴とする水力発電所の水位調整装置。 ２ 特許請求の範囲第１項記載の水位調整装置に
おいて、第２加減算器２０に入力され水位設定器
で設定した設定値信号と偏差を演算する信号が、
放水庭の水位信号と損失水頭の補正信号とからな
る水力発電所の水位調整装置。[Claims] 1. A first adder/subtractor 18 that calculates the deviation between the set value signal of the water level set by the water level setting device and the water level signal of the upper water tank; A water level adjustment device for a hydroelectric power plant configured to obtain the following: a second adder/subtractor 20 that calculates a head difference from the deviation between the set value signal set by the water level setting device 10 and the water level signal of the water garden; The deviation signal calculated by is compared with the set value signals of the upper limit head setting device 24 and the lower limit head setting device 26, which respectively set the upper limit head and lower limit head allowed by the water turbine, and the deviation signal of the second adder/subtractor is calculated. a comparison calculator 28 that outputs a signal according to the comparison result when the value of is above the upper limit head or below the lower limit head, and the output of the comparison calculator and the setting of the water level setting device. a third adder/subtracter 22 for adding and subtracting the value signal; A water level adjustment device for a hydroelectric power plant, configured to receive an input. 2. In the water level adjustment device according to claim 1, the signal input to the second adder/subtractor 20 and used to calculate the deviation from the set value signal set by the water level setter is
A water level adjustment device for a hydroelectric power plant consisting of a water level signal in a water garden and a head loss correction signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58084134A JPS59211110A (en) | 1983-05-16 | 1983-05-16 | Water level controller for hydropower plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58084134A JPS59211110A (en) | 1983-05-16 | 1983-05-16 | Water level controller for hydropower plant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59211110A JPS59211110A (en) | 1984-11-29 |
| JPH0450602B2 true JPH0450602B2 (en) | 1992-08-14 |
Family
ID=13822024
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58084134A Granted JPS59211110A (en) | 1983-05-16 | 1983-05-16 | Water level controller for hydropower plant |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59211110A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2737202B2 (en) * | 1989-01-31 | 1998-04-08 | 横河電機株式会社 | Water turbine guide vane control device |
| JP2766501B2 (en) * | 1989-03-22 | 1998-06-18 | 東芝エンジニアリング株式会社 | Water level adjustment device for dam type hydroelectric power plant |
| KR102333416B1 (en) * | 2017-01-23 | 2021-12-02 | 다이킨 고교 가부시키가이샤 | hydro power system |
| JP6848470B2 (en) * | 2017-01-23 | 2021-03-24 | ダイキン工業株式会社 | Hydropower system |
-
1983
- 1983-05-16 JP JP58084134A patent/JPS59211110A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59211110A (en) | 1984-11-29 |
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