JPS639602A - Inlet steam pressure control method for geothermal turbine - Google Patents
Inlet steam pressure control method for geothermal turbineInfo
- Publication number
- JPS639602A JPS639602A JP15354886A JP15354886A JPS639602A JP S639602 A JPS639602 A JP S639602A JP 15354886 A JP15354886 A JP 15354886A JP 15354886 A JP15354886 A JP 15354886A JP S639602 A JPS639602 A JP S639602A
- Authority
- JP
- Japan
- Prior art keywords
- steam pressure
- main steam
- signal
- geothermal turbine
- load
- 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 7
- 230000007423 decrease Effects 0.000 claims description 8
- 230000006641 stabilisation Effects 0.000 abstract description 6
- 238000011105 stabilization Methods 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
Landscapes
- Control Of Turbines (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は地熱タービンの主蒸気圧力の変動に応じて負荷
を制御するようにした電子式ガバナ割引系において、特
に主蒸気圧力の低下が所定幅を超えたときに有効な地熱
タービンの入口蒸気圧力制御方法に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an electronic governor discount system that controls the load according to fluctuations in the main steam pressure of a geothermal turbine. This invention relates to a method for controlling the inlet steam pressure of a geothermal turbine that is effective when the width exceeds the specified width.
［従来の技術］
地熱プラントとして、蒸気井戸から発生する蒸気を発電
機を駆動するタービンのエネルギーとして利用した、い
わゆる地熱タービンがある。[Prior Art] As a geothermal plant, there is a so-called geothermal turbine that uses steam generated from a steam well as energy for a turbine that drives a generator.
ところで、この地熱タービンの主蒸気系に供給される主
蒸気はその圧力変動が大きいため、通常地熱タービンに
は主蒸気圧力の変動時に発電機負荷を制御するようにし
た電子式ガバナ装置が備えられている。By the way, since the main steam supplied to the main steam system of this geothermal turbine has large pressure fluctuations, geothermal turbines are usually equipped with an electronic governor device that controls the generator load when the main steam pressure fluctuates. ing.
従来、この電子式ガバナ装置は地熱タービンの主蒸気圧
力が低下すると、発ｔｉ負荷を主蒸気圧力に応じて制限
するだけで、主蒸気圧力を一定に制御する機能は持って
いない。Conventionally, this electronic governor device only limits the generation load according to the main steam pressure when the main steam pressure of the geothermal turbine decreases, but does not have the function of controlling the main steam pressure to a constant level.
［発明が解決しようとする問題点］
したがって、地熱タービンの入口蒸気圧力は第２図に示
すように電子式ガバナ装置による負荷制限が進むにつれ
て低下するため、プラント全体の安定化にはつながらな
い。[Problems to be Solved by the Invention] Therefore, as shown in FIG. 2, the inlet steam pressure of the geothermal turbine decreases as the load limitation by the electronic governor device progresses, which does not lead to stabilization of the entire plant.
そこで、本発明は地熱タービンの主蒸気圧力の低下に応
じて負荷制限が進んでも主蒸気圧力変化が一定幅に抑え
てプラント全体の安定化に寄与させることができる地熱
タービンの入口蒸気圧力制御方法を提供することを目的
とする。Therefore, the present invention provides a method for controlling inlet steam pressure of a geothermal turbine, which can suppress changes in main steam pressure within a certain range even if load limitation progresses in response to a decrease in main steam pressure of the geothermal turbine, thereby contributing to stabilization of the entire plant. The purpose is to provide
［問題点を解決するための手段１
本発明は上記のような目的を達成するため、地熱タービ
ンに供給される主蒸気圧力が変動するとその時の主蒸気
圧力に応じて負荷を制御するようにした電子式ガバナｌ
１１１１Ｉｌ系において、前記主蒸気圧力の低下が所定
幅を超えると前記電子式ガバナ制■系の負荷制御に優先
して前記主蒸気圧力の変化がある一定幅の蒸気圧力にな
るように制御することを特徴としている。[Means for Solving the Problems 1] In order to achieve the above-mentioned object, the present invention controls the load according to the main steam pressure supplied to the geothermal turbine when the main steam pressure at that time fluctuates. electronic governor l
In the 1111Il system, when the main steam pressure decrease exceeds a predetermined range, priority is given to load control of the electronic governor control system to control the main steam pressure so that the change is within a certain range of steam pressure. It is characterized by
［作用コ
従って、かかる地熱タービンの入口蒸気圧力制御方法に
あっては主蒸気圧力の低下が所定幅を唱えるまでは電子
式がパナ系で負荷制限が行なわれるが、主蒸気圧力の低
下が所定幅を超えると主蒸気圧力の変化がある一定幅の
蒸気圧力になるようにｔＩＩＩＩ［ｌされるので、プラ
ント全体の安定化に寄与させることができることになる
。[Operations] Therefore, in such a geothermal turbine inlet steam pressure control method, the load is limited by the electronic Pana system until the main steam pressure decreases within a predetermined range; If the width is exceeded, the change in main steam pressure is controlled so that the steam pressure falls within a certain range, which contributes to the stabilization of the entire plant.
［実施例コ
以下本発明の一実施例を第１図を参照しながら説明する
。[Example 1] An example of the present invention will be described below with reference to FIG.
第１図は地熱タービンの主蒸気供給系とその割部系の構
成例を示している。第１図において、王は発１［Ｇを駆
動する地熱タービンで、この地熱タービンＴには蒸気井
戸から発生する蒸気を収集して得られた主蒸気が主蒸気
管を通して供給されるようになっており、その主蒸気管
の中途にガバナ弁６が設けられている。また、１はガバ
ナ弁６より手前の主蒸気管に流れる主蒸気圧力を検出す
る圧力発信器で、この圧力発信器１は主蒸気圧力を検出
するとその圧力に応じた電気信号を出力するものである
。２は圧力発信Ｂ１から出力される電気信号と主蒸気圧
力設定値との偏差信号が入力される主蒸気圧力制御器で
、この主蒸気圧力制御器２は偏差信号の大きさに応じた
信＠Ａを出力するものである。一方、５は負荷発信器で
あり、この負荷発信器５は発電機負荷の大きざに応じた
電気信号を出力するものである。４は負荷発信器５から
出力される電気信号と負荷設定値との偏差信号が入力さ
れる発電機負荷制御器で、この発電機負荷制御器４は偏
差信号の大きさに応じた信号Ｂを出力するものである。FIG. 1 shows an example of the configuration of a main steam supply system of a geothermal turbine and its division system. In Figure 1, King is a geothermal turbine that drives generator 1 [G], and main steam obtained by collecting steam generated from a steam well is supplied to this geothermal turbine T through a main steam pipe. A governor valve 6 is provided in the middle of the main steam pipe. Further, 1 is a pressure transmitter that detects the main steam pressure flowing into the main steam pipe before the governor valve 6, and when this pressure transmitter 1 detects the main steam pressure, it outputs an electric signal according to the pressure. be. 2 is a main steam pressure controller to which a deviation signal between the electrical signal output from the pressure transmitter B1 and the main steam pressure set value is input; This outputs A. On the other hand, 5 is a load transmitter, and this load transmitter 5 outputs an electric signal according to the magnitude of the generator load. Reference numeral 4 denotes a generator load controller to which a deviation signal between the electric signal output from the load transmitter 5 and the load setting value is input, and this generator load controller 4 outputs a signal B according to the magnitude of the deviation signal. This is what is output.
さらに、３は主蒸気圧力制御器２から出力される信号Ａ
と発電機負荷制御器４から出力される信号Ｂが入力され
る信＠選択器で、この信号選択器３は信号Ａと信号Ｂの
うちその値の大きい信号を選択し、その出力信号Ｃによ
りガバナ弁６の開度を制御するものである。Furthermore, 3 is a signal A output from the main steam pressure controller 2.
This signal selector 3 receives the signal B output from the generator load controller 4, and selects the signal with the larger value between the signal A and the signal B, and uses the output signal C to select the signal with the larger value. It controls the opening degree of the governor valve 6.
ここで、発電′Ｒ負荷制罪器４．負荷発信器５およびガ
バナ弁６は電子式ガバナ装置を構成しており、また圧力
発信器１．主蒸気圧力１ｌｌｌ Ｉｎ器２および信号選
択器３は主蒸気圧力制御装置を構成している。Here, power generation 'R load suppressor 4. The load transmitter 5 and the governor valve 6 constitute an electronic governor device, and the pressure transmitter 1. The main steam pressure 1llll In device 2 and the signal selector 3 constitute a main steam pressure control device.
次に作用について述ぺる。Next, I will explain the effect.
主蒸気圧力に変動のない場合、あるいは変動があっても
主蒸気圧力の低下が所定幅を超えない場合には発電機負
荷制御器４から出力される信号Ｂが信号選択器３によっ
て選択され、信号Ｃとしてガバナ弁６に出力される。し
たがって、この場合には従来と同様に負荷制限に伴って
主蒸気圧力は所定幅以内での変化となる。When there is no fluctuation in the main steam pressure, or when there is a fluctuation but the drop in main steam pressure does not exceed a predetermined width, the signal B output from the generator load controller 4 is selected by the signal selector 3; The signal C is output to the governor valve 6. Therefore, in this case, the main steam pressure changes within a predetermined range due to load restriction, as in the conventional case.
このような状態にあるとき、主蒸気圧力の低下が所定幅
を超えて変動すると主蒸気圧力制御器２から出力される
信号Ａが発電礪負荷ｔｉｌｌｌＩｌ器４から出力される
信号Ｂより大きくなるので、信号選択器３は信号Ａを選
択し、信号Ｃとしてガバナ弁６に出力してその開度を制
御する。したがって、この場合には主蒸気圧力の変化が
ある一定幅の蒸気圧力になるように制御される。In such a state, if the drop in main steam pressure fluctuates beyond a predetermined range, the signal A output from the main steam pressure controller 2 will become larger than the signal B output from the power generation load unit 4. , the signal selector 3 selects the signal A and outputs it as the signal C to the governor valve 6 to control its opening degree. Therefore, in this case, the main steam pressure is controlled so that the change in steam pressure is within a certain constant range.
このように本実施例では通常発電機負荷制岨器４から出
力される信号已により負荷制御を行ない、主蒸気圧力の
低下が所定幅を超えると主蒸気圧力制御器２から出力さ
れる信号Ａによりガバナ弁６をｔＪＩＩＩｌＩシて主蒸
気圧力変化が一定幅以内２例えば±２ｋｇ／Ｃｉの主蒸
気圧力になるように抑さえられる。したがって、主蒸気
圧力が一定に保たれるので、プラント全体の安定化に寄
与させることができる。In this way, in this embodiment, load control is normally performed by the signal A output from the generator load controller 4, and when the main steam pressure decrease exceeds a predetermined width, the main steam pressure controller 2 outputs the signal A. By closing the governor valve 6, the change in main steam pressure is suppressed to within a certain range, for example, ±2 kg/Ci. Therefore, the main steam pressure is kept constant, which can contribute to stabilization of the entire plant.
［発明の効果］
以上述べたように本発明によれば、地熱タービンに供給
される主蒸気圧力が変動するとその時の主蒸気圧力に応
じて負荷を制御するようにした電子式ガバナ制御系にお
いて、前記主蒸気圧力の低下が所定幅を超えると前記電
子式ガバナ制御系の負荷制御に優先して前記主蒸気圧力
変化がある一定幅の蒸気圧力になるように制御するよう
にしたので、地熱タービンの主蒸気圧力の低下に応じて
負荷制限が進んでも主蒸気圧力変化が一定幅に抑えるこ
とが可能となり、プラント全体の安定化に寄与させるこ
とができる地熱タービンの入口蒸気圧力制御方法が提供
できる。[Effects of the Invention] As described above, according to the present invention, in an electronic governor control system that controls the load according to the main steam pressure at that time when the main steam pressure supplied to the geothermal turbine fluctuates, When the drop in the main steam pressure exceeds a predetermined range, priority is given to the load control of the electronic governor control system and control is performed so that the main steam pressure changes to a certain range of steam pressure, so that the geothermal turbine It is possible to provide a method for controlling the inlet steam pressure of a geothermal turbine that can suppress changes in main steam pressure within a certain range even if load restriction progresses in response to a decrease in main steam pressure of the geothermal turbine, contributing to the stabilization of the entire plant. .
第１図は本発明による地熱タービンの入口蒸気圧力制御
方法を説明するためのタービンの主蒸気系とその１ｌＪ
ＩＤ系を示す構成図、第２図は従来の負荷制御器による
負荷と主蒸気圧力との関係を示す図である。
１・・・・・・圧力発信器、２・・・・・・主蒸気圧力
制御器、３・・・・・・信号選択器、４・・・・・・発
電機負荷制御器、５・・・・・・負荷発信器、６・・・
・・・ガバナ弁、■・・・・・・地熱タービン、Ｇ・・
・・・・発電機。Figure 1 shows the main steam system of the turbine and its 1lJ to explain the method of controlling the inlet steam pressure of the geothermal turbine according to the present invention.
FIG. 2 is a configuration diagram showing the ID system, and is a diagram showing the relationship between the load and main steam pressure by a conventional load controller. 1... Pressure transmitter, 2... Main steam pressure controller, 3... Signal selector, 4... Generator load controller, 5... ...Load transmitter, 6...
...Governor valve, ■...Geothermal turbine, G...
····Generator.
Claims (1)
時の主蒸気圧力に応じて負荷を制御するようにした電子
式ガバナ制御系において、前記主蒸気圧力の低下が所定
幅を超えると前記電子式ガバナ制御系の負荷制御に優先
して前記主蒸気圧力変化がある一定幅の蒸気圧力になる
ように制御することを特徴とする地熱タービンの入口蒸
気圧力制御方法。In an electronic governor control system that controls the load according to the main steam pressure at that time when the main steam pressure supplied to the geothermal turbine fluctuates, if the main steam pressure decreases beyond a predetermined range, the electronic governor A method for controlling inlet steam pressure of a geothermal turbine, characterized in that the main steam pressure is controlled so that the change in the main steam pressure is within a certain range of steam pressure, giving priority to load control of a control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15354886A JPS639602A (en) | 1986-06-30 | 1986-06-30 | Inlet steam pressure control method for geothermal turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15354886A JPS639602A (en) | 1986-06-30 | 1986-06-30 | Inlet steam pressure control method for geothermal turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS639602A true JPS639602A (en) | 1988-01-16 |
Family
ID=15564915
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15354886A Pending JPS639602A (en) | 1986-06-30 | 1986-06-30 | Inlet steam pressure control method for geothermal turbine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS639602A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60500829A (en) * | 1983-06-08 | 1985-05-30 | ヴイクテルロフ，カ−ル・ヨハン | Means for recording coordinates |
-
1986
- 1986-06-30 JP JP15354886A patent/JPS639602A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60500829A (en) * | 1983-06-08 | 1985-05-30 | ヴイクテルロフ，カ−ル・ヨハン | Means for recording coordinates |
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