JPS63140202A - Method of controlling main steam temperature - Google Patents
Method of controlling main steam temperatureInfo
- Publication number
- JPS63140202A JPS63140202A JP28691586A JP28691586A JPS63140202A JP S63140202 A JPS63140202 A JP S63140202A JP 28691586 A JP28691586 A JP 28691586A JP 28691586 A JP28691586 A JP 28691586A JP S63140202 A JPS63140202 A JP S63140202A
- Authority
- JP
- Japan
- Prior art keywords
- flow rate
- boiler
- steam temperature
- main steam
- output
- 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
- 239000000446 fuel Substances 0.000 claims description 12
- 230000001133 acceleration Effects 0.000 claims description 7
- 239000007921 spray Substances 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、ボイラ、ウォータセパレータと。[Detailed description of the invention] [Industrial application field] The present invention relates to a boiler and a water separator.
これに接続された過熱器、過熱器スプレィ、最終過熱器
及びタービンを備えたボイラタービン発電装置の蒸気の
温度を制御する方法に関する。The present invention relates to a method for controlling the temperature of steam in a boiler-turbine power plant having a superheater, a superheater spray, a final superheater and a turbine connected thereto.
一般に、ボイラタービン発電装置において。 Generally in boiler turbine power generation equipment.
ボイラの蒸気温度制御は、燃料流量及び空気流量を調整
して行っている。第２図はその調整のための従来のブロ
ック図を示すものである。同図において、ボイラ負荷指
令１に応じて関数発生器２で与えられるその設定値と、
圧力計３で計測される主蒸気圧力（Ｐ）との偏差がＰＩ
（比例−積分）コントローラ４の入力とされる。Boiler steam temperature control is performed by adjusting fuel flow rate and air flow rate. FIG. 2 shows a conventional block diagram for this adjustment. In the same figure, the setting value given by the function generator 2 according to the boiler load command 1,
The deviation from the main steam pressure (P) measured by pressure gauge 3 is PI
(Proportional-Integral) This is input to the controller 4.
ＰＩコントローラ４の出力とボイラ負荷指令１とは、加
算器５で加算される。The output of the PI controller 4 and the boiler load command 1 are added by an adder 5.
一方、温度計７で計測された最終過熱器１１の出口の主
蒸λ温度（Ｔ３）とボイラ負荷指令１に応じて関数発生
器８で与えられるその設定項との偏差がＰＩコントロー
ラ９の入力とされる。また、過熱器スプレィ６の前後の
温度差、すなわち、温度計１２で計測される過熱器１０
の出口蒸気感度（Ｔ１）と、温度計１３で計測される最
終過熱器１１の入口蒸気温度（Ｔ２）との温度差が計測
される。On the other hand, the deviation between the main steam λ temperature (T3) at the outlet of the final superheater 11 measured by the thermometer 7 and its setting term given by the function generator 8 according to the boiler load command 1 is input to the PI controller 9. It is said that In addition, the temperature difference before and after the superheater spray 6, that is, the temperature difference of the superheater 10 measured by the thermometer 12
The temperature difference between the outlet steam sensitivity (T1) of and the inlet steam temperature (T2) of the final superheater 11 measured by the thermometer 13 is measured.
この温度差と、ボイラ負荷指令ｌに応じて関数発生器１
４で与えられるその設定値との偏差が。Based on this temperature difference and the boiler load command l, the function generator 1
The deviation from that set value is given by 4.
上記ＰＩコントローラ９の出力及び加算器５の出力と共
に加算器１５にて加算される。The output of the PI controller 9 and the output of the adder 5 are added together in an adder 15.
また、ボイラ負荷指令１に応じて関数発生器１６で与え
られる設定値と、ボイラ入力加速信号。Also, a set value given by the function generator 16 in response to the boiler load command 1 and a boiler input acceleration signal.
すなわちボイラ負荷急変中における先行信号（ＢＩｒｔ
）１７の出力と、加算器１５の出力とが加算器１８にて
加算される。In other words, the preceding signal (BIrt
) 17 and the output of adder 15 are added by adder 18.
燃料流量は、この加算器１８の出力と、むだ時間物の出
力との偏差をＰＩコントローラ１９の入力とし、ＰＩコ
ン）ｏ−ラ１９の出力をむだ時間２０の入力とするフィ
ードバック回路を経て。The fuel flow rate is determined through a feedback circuit in which the deviation between the output of the adder 18 and the output of the dead time is input to the PI controller 19, and the output of the PI controller 19 is input to the dead time 20.
むだ時間２０の出力として得られる。It is obtained as an output with a dead time of 20.
一方、空気流量は、加算器１８の出力に応じた関数発生
装置２１の出力として得られる。On the other hand, the air flow rate is obtained as the output of the function generator 21 according to the output of the adder 18.
上記した従来の温度制御方法では、燃料流量および空気
流量の調整に、同じゲインのボイラ入力加速信号を用い
ることにより、燃料流量に対する空気流量の割合は規定
の値に保っている。In the conventional temperature control method described above, the ratio of the air flow rate to the fuel flow rate is maintained at a specified value by using a boiler input acceleration signal with the same gain to adjust the fuel flow rate and the air flow rate.
従って、ガス循環量が上限となったような場合も、燃料
流量に対する空気流量の割合は一定になり、蒸気温度偏
差を小さくすることば極めて難しかった。Therefore, even when the gas circulation amount reaches its upper limit, the ratio of the air flow rate to the fuel flow rate remains constant, making it extremely difficult to reduce the steam temperature deviation.
本発明では、燃料流量と空気流量との混合割合を変化さ
せ、蒸気温度偏差を小さくすることのできるボイラター
ビン発電装置の温度制御方法を提供することを技術的課
題とする。A technical object of the present invention is to provide a temperature control method for a boiler turbine power generator that can reduce steam temperature deviation by changing the mixing ratio of fuel flow rate and air flow rate.
〔問題点を解決するだめの手段及び作用〕本発明は、ボ
イラの最終過熱器出口の主蒸気温度および圧力と、過熱
器スプレィ前後の温度差との３つの値を計測し、これら
３つの測定値とボイラ負荷指令に基づきそれぞれ対応し
て予め設定された３つの設定値との差を演算し、その演
算値に基づいて空気流量と燃料流量とを調整する主蒸気
温度の制御方法において、ボイラ入力加速信号を上記空
気流量と燃料流量の信号に加算すると共に、ガス分配ダ
ンパの開度が上限のときと、それ以外のときとで、上記
空気流量に加算されるボイラ入力加速信号のゲインを変
えたものである。[Means and effects for solving the problem] The present invention measures three values: the main steam temperature and pressure at the exit of the final superheater of the boiler, and the temperature difference before and after the superheater spray. In a main steam temperature control method that calculates the difference between the value and three preset values that correspond to each other based on the boiler load command, and adjusts the air flow rate and fuel flow rate based on the calculated values, the boiler In addition to adding the input acceleration signal to the air flow rate and fuel flow rate signals, the gain of the boiler input acceleration signal that is added to the air flow rate is determined when the opening degree of the gas distribution damper is at the upper limit and at other times. It has been changed.
再熱器、過熱器が配置されている流路のガス流量をコン
トロールするガス分配ダンパの開度が上限のときと、そ
れ以外のときとで、空気流量信号に加算されるボイラ入
力加速信号のゲインを変えることにより過渡的に燃料流
量に対する空気流量の割合を変化させることができる。The boiler input acceleration signal that is added to the air flow signal is determined when the opening degree of the gas distribution damper that controls the gas flow rate in the flow path where the reheater and superheater are located is at the upper limit, and at other times. By changing the gain, it is possible to transiently change the ratio of the air flow rate to the fuel flow rate.
以下１本発明の一実施例を第１図を参照して説明する。 An embodiment of the present invention will be described below with reference to FIG.
ここで、第２図と同一構成部分は同一符号を付しである
。すなわち同図において。Here, the same components as in FIG. 2 are given the same reference numerals. In other words, in the same figure.
ボイラ負荷指令１に応じて関数発生器２で与えられるそ
の設定値と８圧力計３で計１ｊｌＪされる主蒸気圧力Ｃ
Ｐ）との偏差がＰＩ（比例−積分）コントローラ４の・
入力とされる。ＰＩコントローラ４の出力とボイラ負荷
指令１とは、加算器５で加算される。The main steam pressure C, which is calculated by the set value given by the function generator 2 according to the boiler load command 1 and the total of 1jlJ by the 8 pressure gauges 3
P) of the PI (proportional-integral) controller 4.
It is considered as input. The output of the PI controller 4 and the boiler load command 1 are added by an adder 5.
一方、温度計７で計測された最終過熱器１１の出口の主
蒸気温度（Ｔ３）とボイラ負荷指令ｌに応じて関数発生
器８で与えら扛るその設定値との偏差がＰＩコントロー
ラ９の入力とされる。また、過熱器スプレィ６の前後の
温度差、すなわち、温度計１２で計測される過熱器１０
の出口蒸気感度（Ｔｔ ）と、温度網１３で言４測され
る最終過熱器１１の入口蒸気温度（Ｔ２）との温度差が
計：ｌ＋１される。On the other hand, the deviation between the main steam temperature (T3) at the outlet of the final superheater 11 measured by the thermometer 7 and the set value given by the function generator 8 according to the boiler load command l is determined by the PI controller 9. It is considered as input. In addition, the temperature difference before and after the superheater spray 6, that is, the temperature difference of the superheater 10 measured by the thermometer 12
The temperature difference between the outlet steam sensitivity (Tt) and the inlet steam temperature (T2) of the final superheater 11 measured by the temperature network 13 is calculated as l+1.
この温度差と、ボイラ負荷指令１に応じて関数発生器１
４で与えられるその設定値との偏差が。Based on this temperature difference and the boiler load command 1, the function generator 1
The deviation from that set value is given by 4.
上記ＰＩコントローラ９の出力及び加算器５の出力と共
に加算器１５にて加算される。The output of the PI controller 9 and the output of the adder 5 are added together in an adder 15.
なお、加算器１８には、ボイラ負荷指令１に応じて関数
発生器１６で与えられる設定値と、上記加算器１５との
出力が加算される。Note that the set value given by the function generator 16 according to the boiler load command 1 and the output of the adder 15 are added to the adder 18.
ＰＩコントローラ１９は、上記加算器１８の出力にＢＲ
Ｉ信号１７を加算されたもの、および、むだ時間２０の
出力を入力信号としている。The PI controller 19 applies BR to the output of the adder 18.
The sum of the I signal 17 and the output of the dead time 20 are used as input signals.
２４および２５は定数発生器で、切り換えスイッチ２３
により乗算器２６への出力を選択されるもので、予め与
えられた定数が設定されている。24 and 25 are constant generators, and a changeover switch 23
The output to the multiplier 26 is selected by a predetermined constant.
切り換えスイッチ２３は、ＲＪ（側ガス分配ダンパの開
度が上限の場合に定数設定器２５の出力を選択し、それ
以外の場合には定数設定器２４の出力を選択し２乗算器
２６に出力する。乗算器２６は。The changeover switch 23 selects the output of the constant setter 25 when the opening degree of the RJ (side gas distribution damper) is at the upper limit, otherwise selects the output of the constant setter 24 and outputs it to the 2 multiplier 26. The multiplier 26 does.
上記切り換えスイッチで選択、された定数発生器２４あ
るいは２５の出力とＤＩＲ信号２２との積を求め関数発
生器２１に出力するものである。関数発生器２１の出力
はそのまま空気流量の制御信号となる。The product of the output of the constant generator 24 or 25 selected by the changeover switch and the DIR signal 22 is calculated and output to the function generator 21. The output of the function generator 21 directly serves as a control signal for the air flow rate.
このように、ガス分配ダンパの開度が上限の場合か否か
により定数を選択できるので、過渡的に燃料流量に対す
る空気流量の割合を変化させることができる。これによ
り、空気流量を変化させ、蒸気温度偏差を小さくするこ
とができるものである。In this way, the constant can be selected depending on whether the opening degree of the gas distribution damper is at the upper limit or not, so the ratio of the air flow rate to the fuel flow rate can be changed transiently. Thereby, the air flow rate can be changed and the steam temperature deviation can be reduced.
以上のように１本発明の方法によれば、ガス循環量が上
限の場合に過渡的に空気Ｃｔ ｔを変化させることがで
きるので、蒸気温度偏差を小さくすることができ、産業
上極めて有効である。As described above, according to the method of the present invention, the air Ctt can be changed transiently when the gas circulation amount is at the upper limit, so the steam temperature deviation can be reduced, which is extremely effective industrially. be.
第１図は本発明の一実施例に係る制御装置の構成を示す
ブロック図、第２図は従来の装置のブロック図である。FIG. 1 is a block diagram showing the configuration of a control device according to an embodiment of the present invention, and FIG. 2 is a block diagram of a conventional device.
Claims (1)
熱器スプレイ前後の温度差との３つの値を計測し、これ
ら３つの測定値とボイラ負荷指令に基づきそれぞれ対応
して予め設定された３つの設定値との差を演算し、その
演算値に基づいて上記火炉内に供給される空気の流量と
燃料の流量とを調整する主蒸気温度の制御方法において
、ボイラ入力加速信号を上記空気流量と燃量流量の信号
に加算すると共に、ガス分配ダンパの開度が上限のとき
と、それ以外のときとで、上記空気流量に加算されるボ
イラ入力加速信号のゲインを変えたことを特徴とする主
蒸気温度の制御方法。Three values are measured: the main steam temperature and pressure at the final superheater outlet of the boiler, and the temperature difference before and after the superheater spray, and three values are set in advance based on these three measured values and the boiler load command. In a main steam temperature control method that calculates the difference between two set values and adjusts the air flow rate and fuel flow rate supplied to the furnace based on the calculated value, the boiler input acceleration signal is is added to the fuel flow rate signal, and the gain of the boiler input acceleration signal that is added to the air flow rate is changed depending on when the opening degree of the gas distribution damper is at the upper limit and at other times. How to control main steam temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28691586A JPS63140202A (en) | 1986-12-02 | 1986-12-02 | Method of controlling main steam temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28691586A JPS63140202A (en) | 1986-12-02 | 1986-12-02 | Method of controlling main steam temperature |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63140202A true JPS63140202A (en) | 1988-06-11 |
Family
ID=17710624
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28691586A Pending JPS63140202A (en) | 1986-12-02 | 1986-12-02 | Method of controlling main steam temperature |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63140202A (en) |
-
1986
- 1986-12-02 JP JP28691586A patent/JPS63140202A/en active Pending
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