JPS59120304U - Cross limit circuit for boiler automatic control equipment - Google Patents
Cross limit circuit for boiler automatic control equipmentInfo
- Publication number
- JPS59120304U JPS59120304U JP991483U JP991483U JPS59120304U JP S59120304 U JPS59120304 U JP S59120304U JP 991483 U JP991483 U JP 991483U JP 991483 U JP991483 U JP 991483U JP S59120304 U JPS59120304 U JP S59120304U
- Authority
- JP
- Japan
- Prior art keywords
- flow rate
- boiler
- cross limit
- circuit
- limit circuit
- 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
Landscapes
- Control Of Combustion (AREA)
- 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
第１図は火力プラントの概略図、第２図は従来のクロス
リミット制御回路図、第３図は本考案の一実施例のクロ
スリミット制御回路図、第４図は従来のクロスリミット
制御回路によるプロセス挙動図、第５図は本考案のり９
スリミツト制御回路によるプロセス挙動図である。
１・・・ボイラ自動制御装置、２・・・火炉、３・・・
タービン、４・・・ドラム、５・・・バーナ、１１・・
・給水流量検出器、１４・・・主蒸気加減弁。Figure 1 is a schematic diagram of a thermal power plant, Figure 2 is a conventional cross limit control circuit diagram, Figure 3 is a cross limit control circuit diagram of an embodiment of the present invention, and Figure 4 is a conventional cross limit control circuit. Process behavior diagram, Figure 5 is the glue 9 of the present invention
It is a process behavior diagram by the limit control circuit. 1... Boiler automatic control device, 2... Furnace, 3...
Turbine, 4...Drum, 5...Burner, 11...
- Water supply flow rate detector, 14... Main steam control valve.
Claims (1)
量、空気流量を制御する回路と、燃料流量、空気流量を
互いに制限するクロスリミット回路より成るボイラ自動
側御方式において、ボイラマスター信号を作成する比例
積分器として積分初期値をリセット出来る機能を有する
ディジタル式比例積分器を使用し、さらにボイラマスタ
ー信号と燃料流量及び空気流量信号を比較させ、クロス
リミット動作中であることを検出して、上記比例積分器
出力値の前回路をホールドさせるための信号切替器を設
けたことを特徴とするボイラ自動制御装置のクロスリミ
ット回路。In the boiler automatic side control system, which consists of a boiler master signal, a circuit that controls the fuel flow rate and air flow rate using this signal as a command value, and a cross limit circuit that mutually limits the fuel flow rate and air flow rate, there is a proportional control system that creates the boiler master signal. A digital proportional integrator with a function that can reset the initial integral value is used as an integrator, and the boiler master signal is compared with the fuel flow rate and air flow rate signals to detect that cross limit operation is in progress, and the above proportional A cross limit circuit for an automatic boiler control device, characterized in that a signal switch is provided for holding a pre-circuit of an integrator output value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP991483U JPS59120304U (en) | 1983-01-28 | 1983-01-28 | Cross limit circuit for boiler automatic control equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP991483U JPS59120304U (en) | 1983-01-28 | 1983-01-28 | Cross limit circuit for boiler automatic control equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59120304U true JPS59120304U (en) | 1984-08-14 |
Family
ID=30141361
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP991483U Pending JPS59120304U (en) | 1983-01-28 | 1983-01-28 | Cross limit circuit for boiler automatic control equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59120304U (en) |
-
1983
- 1983-01-28 JP JP991483U patent/JPS59120304U/en active Pending
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