JPH10110629A - Cooling vapor controlling method for gas turbine combustor - Google Patents
Cooling vapor controlling method for gas turbine combustorInfo
- Publication number
- JPH10110629A JPH10110629A JP26294396A JP26294396A JPH10110629A JP H10110629 A JPH10110629 A JP H10110629A JP 26294396 A JP26294396 A JP 26294396A JP 26294396 A JP26294396 A JP 26294396A JP H10110629 A JPH10110629 A JP H10110629A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- combustor
- cooling
- temperature
- control valve
- 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.)
- Granted
Links
- 238000001816 cooling Methods 0.000 title claims abstract description 78
- 238000000034 method Methods 0.000 title claims abstract description 6
- 239000007789 gas Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000567 combustion gas Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
- F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
- F01K23/06—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle
- F01K23/10—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle with exhaust fluid of one cycle heating the fluid in another cycle
- F01K23/101—Regulating means specially adapted therefor
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明はガスタービン発電プ
ラント、又はコンバインド発電プラント等におけるガス
タービン蒸気冷却の制御に関する。The present invention relates to control of gas turbine steam cooling in a gas turbine power plant, a combined power plant, and the like.
【０００２】[0002]
【従来の技術】従来のガスタービン発電プラントでは、
ガスタービンの燃焼器を冷却するに際して、一般的には
ガスタービンの圧縮機からの抽気空気を冷却源として用
いている。2. Description of the Related Art In a conventional gas turbine power plant,
In cooling a combustor of a gas turbine, generally, bleed air from a compressor of the gas turbine is used as a cooling source.
【０００３】この圧縮機から供給される冷却空気は、燃
焼器に必要なレベルのものを圧縮機抽気ラインから取り
出して用いており、途中で供給状況を制御するようなこ
とは行っていない。[0003] As the cooling air supplied from the compressor, a cooling air having a necessary level for the combustor is taken out from the compressor bleed line and used, and the supply state is not controlled on the way.
【０００４】昨今の産業技術の高度化に伴い、ガスター
ビンの燃焼温度の高度化が図られてくると、燃焼器の冷
却蒸気源は前記したような圧縮機からの抽気空気ではま
かなえきれず、その冷却源として蒸気が使用されものも
現れるようになって来た。When the combustion temperature of a gas turbine is increased with the recent advancement of industrial technology, the cooling steam source of the combustor cannot be covered by the bleed air from the compressor as described above. Steam has been used as a cooling source, and some have come to appear.
【０００５】[0005]
【発明が解決しようとする課題】前記した蒸気を冷却源
として用いるいわゆる蒸気冷却方式は、産業技術の一歩
前進であるが、未だ完成されたものではなく試行錯誤の
過程であり、その制御技術の分野でも確立された制御方
式は得られていない。The so-called steam cooling method using steam as a cooling source is a step forward of industrial technology, but is not completed yet but is a process of trial and error. No established control method has been obtained in the field.
【０００６】特に燃焼器の蒸気冷却においては、燃焼器
内圧力より燃焼器出口冷却蒸気圧力を高く保たないと、
微少な疵や孔から燃焼ガスが侵入し、燃焼器を焼損する
可能性がある。In particular, in the steam cooling of the combustor, unless the pressure of the cooling steam at the outlet of the combustor is kept higher than the pressure in the combustor,
Combustion gas may enter through minute flaws or holes and burn the combustor.
【０００７】また、冷却蒸気が規定流量より多すぎると
燃焼器出口冷却蒸気温度が低くなりすぎ、燃焼器が過冷
却となる不具合があり、前記燃焼器出口冷却蒸気の圧
力、及び温度は適切な制御を求められるところである。[0007] If the cooling steam is too large than the specified flow rate, the temperature of the cooling steam at the outlet of the combustor becomes too low, causing a problem that the combustor is over-cooled. Control is being sought.
【０００８】本発明はこのような点に着目し、従来のも
のにおける不具合点を解消し、燃焼器出口冷却蒸気の圧
力、及び温度を好適に制御するようにしたものを提供す
ることを課題とするものである。The present invention has been made in view of the above points, and has as its object to provide a device which solves the disadvantages of the conventional device, and which suitably controls the pressure and temperature of the cooling steam at the outlet of the combustor. Is what you do.
【０００９】[0009]
【課題を解決するための手段】本発明は前記した課題を
解決するべくなされたもので、燃焼器出口の冷却蒸気圧
力とバイアスを加算した燃焼器内圧力とを比較して前者
が後者より下がらないように冷却蒸気出口流路の圧力制
御弁で調節するとともに、前記燃焼器出口の冷却蒸気温
度を検知してこれが規定温度以下になったら冷却蒸気バ
イパス流路の温度制御弁を開にして冷却蒸気をバイパス
するガスタービン燃焼器の冷却蒸気制御方法を提供し、
燃焼器の冷却蒸気出口流路に圧力制御弁を設け、燃焼器
出口の冷却蒸気圧力を検出し、また燃焼器内圧力を検出
してこれに一定のバイアスを加算したものを算出して前
記冷却蒸気圧力と比較し、前者が後者を下まわらないよ
うに前記圧力制御弁で圧力調整を行う一方、燃焼器出口
では冷却蒸気の温度も検出し、これを規定値と比較して
検出値が規定値を下まわったらバイパス流路の温度制御
弁を開いて冷却蒸気をバイパスさせ、燃焼器冷却の蒸気
流量を減ずるようにし、これにより燃焼器冷却蒸気の圧
力と温度を好適なものに維持するようにしたものであ
る。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and the former is lower than the latter by comparing the cooling steam pressure at the combustor outlet with the pressure in the combustor obtained by adding the bias. The temperature is controlled by the pressure control valve of the cooling steam outlet flow path so that the temperature of the cooling steam is detected at the outlet of the combustor. A method for controlling cooling steam of a gas turbine combustor that bypasses steam,
A pressure control valve is provided in the cooling steam outlet flow path of the combustor, the cooling steam pressure at the combustor outlet is detected, the pressure in the combustor is detected, and a value obtained by adding a constant bias to the pressure is calculated to calculate the cooling pressure. In comparison with the steam pressure, the pressure is adjusted by the pressure control valve so that the former does not fall below the latter, while the temperature of the cooling steam is also detected at the combustor outlet, and the detected value is compared with the specified value to determine the detected value. When the temperature falls below the value, the temperature control valve of the bypass passage is opened to bypass the cooling steam so that the steam flow rate of the combustor cooling is reduced, thereby maintaining the pressure and the temperature of the combustor cooling steam at a suitable level. It was made.
【００１０】[0010]
【発明の実施の形態】本発明の実施の一形態を、図１な
いし図３により説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS.
【００１１】１は燃焼器で、図示省略の冷却蒸気源から
冷却蒸気供給流路２１を経て冷却蒸気が供給され、燃焼
器１を冷却の後、冷却蒸気出口流路２２を経て図示省略
の回収部へ至るように構成されている。Reference numeral 1 denotes a combustor. Cooling steam is supplied from a cooling steam source (not shown) through a cooling steam supply passage 21. After the combustor 1 is cooled, a recovery steam (not shown) is passed through a cooling steam outlet passage 22. Section.
【００１２】また、同冷却蒸気は、燃焼器１の上流で冷
却蒸気供給流路２１から分岐する冷却蒸気バイパス流路
２３を経て燃焼器１をバイパス可能となっている。Further, the cooling steam can bypass the combustor 1 through a cooling steam bypass passage 23 branched from a cooling steam supply passage 21 upstream of the combustor 1.
【００１３】２は圧力制御弁で、前記冷却蒸気出口流路
２２に設けられ、同圧力制御弁２の開閉度を変えること
により冷却蒸気出口流路２２の開度、即ち燃焼器１の出
口の冷却蒸気圧力を調節するものである。Reference numeral 2 denotes a pressure control valve which is provided in the cooling steam outlet flow path 22 and changes the opening / closing degree of the pressure control valve 2 so that the opening degree of the cooling steam outlet flow path 22, that is, the outlet of the combustor 1 is changed. The cooling steam pressure is adjusted.
【００１４】３は温度制御弁で、冷却蒸気バイパス流路
２３に設けられ、これが開けば冷却蒸気バイパス流路２
３が完成し、燃焼器１へ供給される冷却蒸気の分量が減
少し、以って燃焼器１の出口の冷却蒸気温度を調節する
ものである。Reference numeral 3 denotes a temperature control valve which is provided in the cooling steam bypass passage 23 and which is opened when the cooling steam bypass passage 23 is opened.
3 is completed, the amount of cooling steam supplied to the combustor 1 is reduced, and thus the temperature of the cooling steam at the outlet of the combustor 1 is adjusted.
【００１５】４は燃焼器内圧力検出装置、５は燃焼器出
口冷却蒸気圧力検出装置、６は燃焼器出口冷却蒸気温度
検出装置である。Reference numeral 4 denotes a pressure detector in the combustor, reference numeral 5 denotes a pressure sensor for cooling steam at the outlet of the combustor, and reference numeral 6 denotes a temperature detector for cooling steam at the outlet of the combustor.
【００１６】このような基本的な構成に更に種々の制御
装置を加え、本実施の形態における圧力制御弁２と温度
制御弁３は、それぞれ以下のように制御される。Various control devices are further added to such a basic configuration, and the pressure control valve 2 and the temperature control valve 3 in the present embodiment are controlled as follows.
【００１７】まず、圧力制御弁２については、燃焼器出
口冷却蒸気圧力検出装置５により検出した蒸気圧力と、
燃焼器内圧力検出装置４が検出した燃焼器内圧力にバイ
アス設定器９により規定値バイアスを加算器８で加算し
た値とを比較器７で比較し、この比較結果をＰＩ調節器
１０に加え、ここで圧力制御弁２の基本的な開度指令が
作られる。First, regarding the pressure control valve 2, the steam pressure detected by the combustor outlet cooling steam pressure detecting device 5
A comparator 7 compares a value obtained by adding a prescribed value bias by an adder 8 by a bias setting device 9 to a pressure in the combustor detected by the pressure detector 4 in the combustor, and adds the comparison result to a PI controller 10. Here, a basic opening command of the pressure control valve 2 is created.
【００１８】即ち、燃焼器出口冷却蒸気圧力と燃焼器内
圧力にバイアスを加算した圧力値との差が一定の正の値
となるのが基本であるが、前記比較器７での比較の結
果、この差が小さくなる方向に変化するときには圧力制
御弁２を絞って燃焼器出口冷却蒸気圧力を高め、前記の
差を所定の値に維持するように制御する。That is, the difference between the pressure of the cooling steam at the outlet of the combustor and the pressure value obtained by adding the bias to the pressure in the combustor is basically a constant positive value. When the difference changes in a direction of decreasing, the pressure control valve 2 is throttled to increase the pressure of the cooling steam at the outlet of the combustor, and the difference is controlled to be maintained at a predetermined value.
【００１９】そして前記ＰＩ調節器１０で作られた圧力
制御弁２の基本的な開度指令は、更に燃焼器１への冷却
蒸気源の閉塞防止回路として用意された温度開度設定器
１１にて設定された最低開度指令と高値選択器１２で対
比され、最終的に最低開度を保証した上で圧力制御弁２
を制御する。The basic opening degree command of the pressure control valve 2 made by the PI controller 10 is further sent to a temperature opening degree setting unit 11 prepared as a circuit for preventing the cooling steam source from closing the combustor 1. The minimum opening command set in advance and the high value selector 12 are compared, and finally the minimum opening is guaranteed, and the pressure control valve 2
Control.
【００２０】次に温度制御弁３については、燃焼器出口
冷却蒸気温度検出装置６により検出した蒸気温度をプロ
グラム設定器１３にてあらかじめ定めた値と比較し、そ
の結果が規定温度値以下となったら温度制御弁３が開と
なり、冷却蒸気バイパス流路２３が完成して冷却蒸気の
一部が燃焼器１をバイパスするように設定されたプログ
ラム開度指令により温度制御弁３を制御する。Next, for the temperature control valve 3, the steam temperature detected by the combustor outlet cooling steam temperature detecting device 6 is compared with a predetermined value by the program setting device 13, and the result is lower than the specified temperature value. Then, the temperature control valve 3 is opened, the cooling steam bypass flow path 23 is completed, and the temperature control valve 3 is controlled by a program opening command set so that a part of the cooling steam bypasses the combustor 1.
【００２１】かくして本実施の形態によれば、燃焼器１
を安全、確実、かつ効果的に冷却することができるもの
である。Thus, according to the present embodiment, the combustor 1
Can be safely, reliably, and effectively cooled.
【００２２】以上、本発明を図示の実施の形態について
説明したが、本発明はかかる実施の形態に限定されず、
本発明の範囲内でその具体的構造に種々の変更を加えて
よいことはいうまでもない。Although the present invention has been described with reference to the illustrated embodiment, the present invention is not limited to such an embodiment.
It goes without saying that various changes may be made to the specific structure within the scope of the present invention.
【００２３】[0023]
【発明の効果】以上、本発明によれば、ガスタービンの
燃焼温度の高温化に対して燃焼器の冷却として冷却蒸気
を採用し、かつ、その冷却に際し、安全、確実そして効
果的な冷却を行い、プラントの安定性と信頼性を向上す
る制御を行うことができたものである。As described above, according to the present invention, cooling steam is adopted as cooling of the combustor against the increase in the combustion temperature of the gas turbine, and safe, reliable and effective cooling is performed in the cooling. As a result, the control for improving the stability and reliability of the plant could be performed.
【図１】本発明の実施の一形態に係わる燃焼器の蒸気冷
却系統図。FIG. 1 is a diagram of a steam cooling system of a combustor according to an embodiment of the present invention.
【図２】図１のものにおける燃焼器冷却蒸気圧力制御弁
の制御回路図。FIG. 2 is a control circuit diagram of a combustor cooling steam pressure control valve in FIG.
【図３】図１のものにおける燃焼器冷却蒸気温度制御弁
の制御回路図。FIG. 3 is a control circuit diagram of a combustor cooling steam temperature control valve in FIG.
１ 燃焼器 ２ 圧力制御弁 ３ 温度制御弁 ４ 燃焼器内圧力検出装置 ５ 燃焼器出口冷却蒸気圧力検出装置 ６ 燃焼器出口冷却蒸気温度検出装置 ７ 比較器 ８ 加算器 ９ バイアス設定器 １０ ＰＩ調節器 １１ 最低開度設定器 １２ 高値選択器 １３ プログラム設定器 ２１ 冷却蒸気供給流路 ２２ 冷却蒸気出口流路 ２３ 冷却蒸気バイパス流路 DESCRIPTION OF SYMBOLS 1 Combustor 2 Pressure control valve 3 Temperature control valve 4 Combustor internal pressure detector 5 Combustor outlet cooling steam pressure detector 6 Combustor outlet cooling steam temperature detector 7 Comparator 8 Adder 9 Bias setter 10 PI controller 11 Minimum opening degree setting device 12 High value selection device 13 Program setting device 21 Cooling steam supply channel 22 Cooling steam outlet channel 23 Cooling steam bypass channel
Claims (1)
加算した燃焼器内圧力とを比較して前者が後者より下が
らないように冷却蒸気出口流路の圧力制御弁で調節する
とともに、前記燃焼器出口の冷却蒸気温度を検知してこ
れが規定温度以下になったら冷却蒸気バイパス流路の温
度制御弁を開にして冷却蒸気をバイパスすることを特徴
とするガスタービン燃焼器の冷却蒸気制御方法。1. A cooling steam pressure at a combustor outlet is compared with a pressure in the combustor obtained by adding a bias, and the pressure is adjusted by a pressure control valve in a cooling steam outlet passage so that the former does not become lower than the latter. A cooling steam control method for a gas turbine combustor, comprising: detecting a cooling steam temperature at an outlet of the gas turbine, and when the temperature becomes equal to or lower than a specified temperature, opening a temperature control valve of a cooling steam bypass flow path to bypass the cooling steam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8262943A JP2877298B2 (en) | 1996-10-03 | 1996-10-03 | Cooling steam control method for gas turbine combustor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8262943A JP2877298B2 (en) | 1996-10-03 | 1996-10-03 | Cooling steam control method for gas turbine combustor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10110629A true JPH10110629A (en) | 1998-04-28 |
| JP2877298B2 JP2877298B2 (en) | 1999-03-31 |
Family
ID=17382726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8262943A Expired - Lifetime JP2877298B2 (en) | 1996-10-03 | 1996-10-03 | Cooling steam control method for gas turbine combustor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2877298B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6324829B1 (en) | 1998-01-29 | 2001-12-04 | Mitsubishi Heavy Industries, Ltd. | Steam cooled system in combined cycle power plant |
-
1996
- 1996-10-03 JP JP8262943A patent/JP2877298B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6324829B1 (en) | 1998-01-29 | 2001-12-04 | Mitsubishi Heavy Industries, Ltd. | Steam cooled system in combined cycle power plant |
| EP1182330A1 (en) * | 1998-01-29 | 2002-02-27 | Mitsubishi Heavy Industries, Ltd. | Outlet steam monitoring system in steam cooled type gas turbine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2877298B2 (en) | 1999-03-31 |
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