JPS59180331A - Flow rate measuring device - Google Patents
Flow rate measuring deviceInfo
- Publication number
- JPS59180331A JPS59180331A JP58054798A JP5479883A JPS59180331A JP S59180331 A JPS59180331 A JP S59180331A JP 58054798 A JP58054798 A JP 58054798A JP 5479883 A JP5479883 A JP 5479883A JP S59180331 A JPS59180331 A JP S59180331A
- Authority
- JP
- Japan
- Prior art keywords
- dam
- guide vane
- flow rate
- signal
- water level
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 30
- 230000005611 electricity Effects 0.000 claims description 2
- 238000001514 detection method Methods 0.000 claims 1
- 238000000034 method Methods 0.000 description 8
- 238000005259 measurement Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000000700 radioactive tracer Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、水力発電所における流量測定装置に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a flow rate measuring device in a hydroelectric power plant.
水力発電所において、発電に使用される水の流量測定に
は流速計法、ビート管法、差圧法、超音波法及びトレー
サ法等が存在し、何れも測定する水圧管路の直管部に成
る長さを必要とする制約がある。At hydroelectric power plants, there are methods to measure the flow rate of water used for power generation, including the current meter method, beat tube method, differential pressure method, ultrasonic method, and tracer method. There is a constraint that requires a length of
すなわち、第１図は水力発電所における水車までの水圧
管路の概略を示したもので、４が水車、１が水圧管路で
ダムよシ矢印の如く水が流入する。That is, FIG. 1 shows an outline of the penstock line leading to the water wheel in a hydroelectric power plant, where 4 is the water wheel, 1 is the penstock line, and water flows into the dam as shown by the arrow.
２が入口弁、Ｉａが水圧管路の直管部で、入口弁２を通
過した水は、この直管部１ａ、ガイドベーン３、水車４
を通って矢印のように放水路に放水される。2 is an inlet valve, and Ia is a straight pipe part of the hydraulic pipeline.
Water is discharged into the drainage channel as shown by the arrow.
このようなものにおいて、上述した各測定法における水
の流量測定は１．ＴＢＣ−１５７によると水圧管路の直
管部１ａに測定点Ａを定め、例えば流速計法、ビート管
法では測定点Ａの上流側の直管部の長さｔｌは、測定点
Ａの管路内径の２０倍以上必要とし、また下流ｔ２は同
様に５倍以上の直管部長を必要とする。他の測定法につ
いても夫々直管部１ａの長さに制約がつけられている。In such a device, the water flow rate measurement using each of the above-mentioned measurement methods is as follows: 1. According to TBC-157, measurement point A is defined in the straight pipe section 1a of the penstock pipe, and for example, in the current meter method and the beat pipe method, the length tl of the straight pipe section on the upstream side of measurement point A is the length tl of the straight pipe section at measurement point A. It requires 20 times or more of the inner diameter of the pipe, and the downstream t2 similarly requires a straight pipe length of 5 times or more. Restrictions are also placed on the length of the straight pipe portion 1a for the other measurement methods.
ところで最近、省エネルギーの観点から、小水力発電所
が注目されてきたが、この場合における直管部の長さが
スペース的に定められた長さのものが得られないため流
量測定には大きな問題が生じでいた。Recently, small hydropower plants have been attracting attention from the perspective of energy conservation, but in this case, there is a big problem in measuring flow rate because the length of the straight pipe section cannot be determined due to space considerations. was occurring.
本発明はかハ）る点に鑑みなされたもので、水玉管路に
直管部がなくとも水の流量測定が可能な流量測定装置を
提供せんとするもので、以下第２図に基いて本発明の一
実施例を詳述する。The present invention has been made in view of the above points, and aims to provide a flow rate measuring device capable of measuring the flow rate of water even if there is no straight pipe section in the water drop pipe. An embodiment of the present invention will be described in detail.
第２図において第１図と同符号のものは同一名称、若し
くは相当部分を示す、、５は発電機で、この発電機５は
水車４と連結されている。６は吐出管、７はガイドベー
ン開度検出器で、この検出器７は例えばポテンショメー
タ等が用いられ、ガイドベーン乙の開度に応じた電圧や
電流或いは抵抗として検出し、演算装置８に出力する６
９はダム水位検出器、１０はダムである。ダム水位検出
器９にて検出された水位信号は演算装置８に出力される
。演算装置８は減算手段１１、開平手段１２．乗算手段
１３．１４′？有している。In FIG. 2, the same symbols as in FIG. 1 indicate the same names or corresponding parts. 5 is a generator, and this generator 5 is connected to the water turbine 4. 6 is a discharge pipe, and 7 is a guide vane opening degree detector. This detector 7 is, for example, a potentiometer, and detects it as a voltage, current, or resistance according to the opening degree of the guide vane B, and outputs it to the calculation device 8. do6
9 is a dam water level detector, and 10 is a dam. The water level signal detected by the dam water level detector 9 is output to the calculation device 8. The arithmetic unit 8 includes a subtraction means 11, a square root means 12. Multiplying means 13.14'? have.
上記の如く構成された本発明において、次に流量測定に
ついて説明する。In the present invention configured as described above, flow rate measurement will be explained next.
水圧管路１を貫流してぎたダムよりの水で水車４が駆動
され、必要に応じて増速機を介して発電機５０回転部が
回転され、この回転により発電機５は発電して出力を発
生する。このときガイドベーン開度検出器７はガイドベ
ーン乙の開度を検出し、開度信号Ｇを演算装置６の乗算
手段１ろに出力する。一方、ダム水位検出器９でダムの
水位Ｈ（ダムの静落差（ｍ））を検出して減算手段１１
に出力する。The water from the dam that has flowed through the penstock 1 drives the water wheel 4, and if necessary, the rotation part of the generator 50 is rotated via a speed increaser, and this rotation causes the generator 5 to generate electricity and output. occurs. At this time, the guide vane opening degree detector 7 detects the opening degree of the guide vane B, and outputs an opening degree signal G to the multiplication means 1 of the arithmetic unit 6. On the other hand, the dam water level detector 9 detects the dam water level H (dam static head (m)) and the subtraction means 11
Output to.
減算手段１１には流量の関数とし前もって知り得る管路
の損失水頭ＨＬが記憶されており、この減算手段１１に
おいて次式によってダムの有効落差購が求められる。
゛
Ｈｅ ＝ Ｈ−ＨＬ・・・・・・・・・・・・（１）ダ
ムの有効落差Ｈｅが求まれば、ガイドベーン開度検出器
７にて検出された開度信号Ｇ ”ｌ用いて次式により流
量Ｑを求めることが出来る。The subtraction means 11 stores the head loss HL of the pipeline which can be known in advance as a function of the flow rate, and the effective head of the dam is determined by the following equation.
゛He = H-HL (1) Once the effective head He of the dam is determined, the opening signal G ``l detected by the guide vane opening detector 7 is used. The flow rate Q can be determined using the following equation.
Ｑ ＝Ｌｉ−ｔ （Ｈｅ 、 Ｇ ）−、−−−−−−
（：２１この流量Ｑを求めるために、減算手段１１の出
力Ｈｅの一つは開平手段１２に送られ−ｃＪＰの演算が
なされ、またＨｅの他の一つは乗算手段世に送られて開
度信号Ｇと、前もって知れる水車特性の関数ｆとの乗算
演算が行なわれる。この結果の信号は更に乗算手段１４
に送られて開平手段１２にて求まった島信号との乗算が
行なわれて流量Ｑが求められ、指示計器用や制量信号用
あるいは警報信号用等に用いられる。Q = Li-t (He, G)-, --------
(:21 In order to obtain this flow rate Q, one of the outputs He of the subtraction means 11 is sent to the square root means 12 to calculate −cJP, and the other output He is sent to the multiplication means to calculate the opening degree. A multiplication operation is performed between the signal G and a function f of the water turbine characteristics known in advance.The resulting signal is further transmitted to the multiplication means 14.
The flow rate Q is determined by multiplication with the island signal determined by the square root means 12, and is used for an indicator, a control signal, an alarm signal, etc.
以上のように本発明は、検出されたガイドベーン開反信
号とダム水位信号とを基に流量Ｑを求めるよ５にしたも
のである。このため従来のように水圧管路の直管部の長
短、或いは直管部の有無に影響されずに流量Ｑが測定で
き、特に小水力発電所には有効なものである。また、水
ＥＥ管路−＼の測定器取付等の加工が不要となり、且つ
価格的にも、例えば超音波等と比較すると１７１０程度
安価となるものである。更には指示計器、制御、警報回
路−＼の信号が容易に得られる等の効果を有するもので
ある。As described above, in the present invention, the flow rate Q is determined based on the detected guide vane opening signal and the dam water level signal. Therefore, the flow rate Q can be measured without being affected by the length of the straight pipe section of the penstock or the presence or absence of the straight pipe section, unlike in the past, and this is particularly effective for small hydropower plants. Further, processing such as attaching a measuring device to the water EE pipe line is not required, and the cost is about 1710 times cheaper than, for example, ultrasonic waves. Furthermore, it has the advantage that signals for indicating instruments, control, and alarm circuits can be easily obtained.
第１図は従来の水圧管路の概略図、第２図は本発明の一
実施例を示す構成図である。
１・・・水圧管路、６・・・ガイドベーン、４・・・水
車、５・・・発電機、７・・・ガイドベーン開度検出器
、９・・・ダム水位検出器、８・・・演算装置。
特許出願人FIG. 1 is a schematic diagram of a conventional hydraulic pipe line, and FIG. 2 is a configuration diagram showing an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Hydraulic pipe, 6... Guide vane, 4... Water turbine, 5... Generator, 7... Guide vane opening degree detector, 9... Dam water level detector, 8... ...Arithmetic device. patent applicant
Claims (1)
にて水車乞駆動し、この水車と連結された発電機にて発
電するようにしたものに於て、前記ガイドベーンの開度
を検出するガイドベーン開度検出器と、ダム水位検出器
と−このダム水位検出器にて検出された検出信号より前
もって記憶された管路の損失水頭値を減算してダムの有
効落差を求める減算手段と、この減算手段にて求められ
た有効落差信号を開平する開平手段と、前記有効落差信
号と検出されたガイドベーン開度信号とを乗算する乗算
手段と、この乗算手段にて求まった信号と前記開平手段
にて求まった信号との乗算を行う乗算手段とを備えたこ
とを特徴とする流量測定装置。In a waterwheel driven by water from a dam introduced through a penstock and guide vane, and a generator connected to the waterwheel generates electricity, the opening degree of the guide vane is detected. a guide vane opening degree detector, a dam water level detector, and a subtraction means for subtracting the head loss value of the pipe stored in advance from the detection signal detected by the dam water level detector to obtain the effective head of the dam. , a square root means for square rooting the effective head signal obtained by the subtraction means, a multiplication means for multiplying the effective head signal by the detected guide vane opening signal, and a signal obtained by the multiplication means. A flow rate measuring device comprising: multiplication means for performing multiplication by the signal obtained by the square root means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58054798A JPS59180331A (en) | 1983-03-30 | 1983-03-30 | Flow rate measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58054798A JPS59180331A (en) | 1983-03-30 | 1983-03-30 | Flow rate measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59180331A true JPS59180331A (en) | 1984-10-13 |
Family
ID=12980770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58054798A Pending JPS59180331A (en) | 1983-03-30 | 1983-03-30 | Flow rate measuring device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59180331A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5569017A (en) * | 1978-11-20 | 1980-05-24 | Hitachi Ltd | Calculation system for dam flow |
-
1983
- 1983-03-30 JP JP58054798A patent/JPS59180331A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5569017A (en) * | 1978-11-20 | 1980-05-24 | Hitachi Ltd | Calculation system for dam flow |
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