JP2772097B2 - Combustion chamber ventilator control device - Google Patents
Combustion chamber ventilator control deviceInfo
- Publication number
- JP2772097B2 JP2772097B2 JP2034701A JP3470190A JP2772097B2 JP 2772097 B2 JP2772097 B2 JP 2772097B2 JP 2034701 A JP2034701 A JP 2034701A JP 3470190 A JP3470190 A JP 3470190A JP 2772097 B2 JP2772097 B2 JP 2772097B2
- Authority
- JP
- Japan
- Prior art keywords
- control unit
- damper
- control
- inverter
- combustion chamber
- 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.)
- Expired - Lifetime
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N3/00—Regulating air supply or draught
- F23N3/002—Regulating air supply or draught using electronic means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2235/00—Valves, nozzles or pumps
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Regulation And Control Of Combustion (AREA)
- Control Of Ac Motors In General (AREA)
Description
【発明の詳細な説明】 〔発明の目的〕 （産業上の利用分野） 本発明は、燃焼室用通風機の制御装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial application field) The present invention relates to a control device of a ventilation device for a combustion chamber.
（従来の技術） 従来、ボイラの炉内圧力制御を行なう場合、誘引通風
機（以下IDFと言う）とダンパを併用する場合が多くな
っており、この場合、IDFはインバータ装置を設けて回
転数を変化させている。また、ボイラの炉内圧力制御系
において外乱となるのは燃焼用空気流量であり、これは
燃焼制御系によって炉内圧力制御系とは独立して押込通
風機（以下FDFと言う）によって制御される。そして、
従来の技術ではダンバを全開にしておきIDFの回転数で
炉内圧力制御をする場合が多いが、この場合は（１）回
転数の応答速度の問題から制御性が悪い、（２）インバ
ータ故障時IDFは商用運転即ち一定回転数になるため炉
内圧力はダンバで制御しなければならず制御系に切替等
が入り複雑になる等の問題点があった。(Prior art) Conventionally, when controlling the pressure in a furnace of a boiler, it has been common to use an induction ventilator (hereinafter referred to as IDF) and a damper together. In this case, the IDF is provided with an inverter device to control the rotational speed. Is changing. Also, the disturbance in the boiler furnace pressure control system is the combustion air flow rate, which is controlled by the combustion control system by a forced ventilation (FDF) independently of the furnace pressure control system. You. And
In the conventional technology, the pressure in the furnace is often controlled by the IDF rotation speed with the damper fully opened, but in this case, (1) poor controllability due to the problem of the response speed of the rotation speed, (2) inverter failure When the IDF is in commercial operation, that is, at a constant rotation speed, the furnace pressure has to be controlled by a damper, and there is a problem that the control system is switched and the system becomes complicated.
更に、特願昭54-80730号「操作端制御装置」ではIDF
とダンパを両方操作している。In addition, in Japanese Patent Application No.
And damper are both operated.
これによれば、炉内圧力制御はまずダンパ制御し、ID
Fはダンパ開度が規定開度を逸脱した場合に回転数を変
化させ、定常的にはダンパ開度は規定範囲に入るように
動作させるので、炉内圧力制御をダンパで行うことによ
り、インバータ故障時も同一方法で制御を継続すること
ができ、またインバータに比べてダンパの応答速度の方
が一般的には早いので制御性が良く、更にダンパ開度規
定範囲を全開に近くすることによりダンパによる損失も
少なくすることができる等の利点がある。According to this, the furnace pressure control first controls the damper,
F changes the rotation speed when the damper opening deviates from the specified opening, and normally operates so that the damper opening is within the specified range. In the event of a failure, control can be continued in the same manner, and the response speed of the damper is generally faster than that of the inverter, so controllability is good. There are advantages such as the loss due to the damper can be reduced.
（発明が解決しようとする課題） ダンパとIDFの回転数を変化させる手段として使用す
るインバータの組み合せ制御において、外乱対策のため
にFF制御をかけたくてもできなかったため制御性が悪く
なってしまう。即ち燃焼制御系の方で燃焼用空気流量を
変化させると炉内圧力制御ではFF制御ができないため炉
内圧力が変化してしまう。(Problems to be Solved by the Invention) In the combination control of the inverter used as a means for changing the rotation speed of the damper and the IDF, controllability deteriorates because it is not possible to perform FF control to prevent disturbance. . That is, if the combustion air flow rate is changed in the combustion control system, the FF control cannot be performed by the furnace pressure control, so that the furnace pressure changes.
（課題を解決するための手段） この発明は燃焼室本体の中の気体を誘引して通風する
誘引通風機と、この誘引通風機を駆動するインバータ装
置と、このインバータ装置の運転を静特性補償して制御
する第１のFF制御部と、気体の通風量を制御するダンパ
と、このダンパの開度を静特性補償又は動特性補償して
制御する第２のFF制御部と、圧力を検出する圧力検出器
と、この圧力検出器からの圧力信号によって第２のFF制
御部に出力する炉内圧力制御部と、この炉内圧力制御部
からの出力信号によって第１のFF制御部に補正信号を出
力するダンパ開度補正制御部とを具備してなる燃焼室用
通風機の制御装置である。(Means for Solving the Problems) The present invention relates to an induction ventilator for inducing and ventilating gas in a combustion chamber body, an inverter device for driving the induction ventilator, and a static characteristic compensation for the operation of the inverter device. A first FF control unit for controlling the air flow rate, a damper for controlling the gas flow rate, a second FF control unit for controlling the opening degree of the damper by compensating for the static characteristic or the dynamic characteristic, and detecting the pressure. Pressure detector, a furnace pressure controller that outputs a pressure signal from the pressure detector to a second FF controller, and a correction to the first FF controller by an output signal from the furnace pressure controller. And a damper opening correction control unit for outputting a signal.
（作用） 本発明はダンパとインバータの組み合せ制御に対して
外乱信号を使用したFF制御を行ない制御性の向上をはか
る。(Function) The present invention improves the controllability by performing FF control using a disturbance signal with respect to the combined control of the damper and the inverter.
（実施例） 次に本発明の一実施例を説明ずる。第１図は燃焼室本
体１の中の気体を誘引して通風する誘引通風機10と、こ
の誘引通風機10を駆動するインバータ装置３と、ィンバ
ータ装置３の運転を静特性補償して制御する第１のFF制
御部９と、気体の通風量を制御するダンパ４と、このダ
ンパ４の開度を静特性補償又は動特性補償して制御する
FF制御部８と、燃焼室本体１の圧力を検出する圧力検出
器２と、この圧力検出器２からの圧力信号によってFF制
御部８に出力する炉内圧力制御部５と、炉内圧力制御部
５からの出力信号によってFF制御部９に補正信号を出力
するダンパ開度補正制御部９とを具備してなる燃焼室用
通風機の制御装置を示している。(Example) Next, an example of the present invention will be described. FIG. 1 shows an induction ventilator 10 for inducing and ventilating gas in the combustion chamber body 1, an inverter device 3 for driving the induction ventilator 10, and controlling the operation of the inverter device 3 by compensating static characteristics. A first FF control unit 9, a damper 4 for controlling the amount of gas flow, and an opening degree of the damper 4 is controlled by compensating static characteristics or dynamic characteristics.
FF control unit 8, pressure detector 2 for detecting the pressure of combustion chamber main body 1, furnace pressure control unit 5 for outputting to FF control unit 8 by a pressure signal from pressure detector 2, and furnace pressure control 2 shows a control device for a ventilation fan for a combustion chamber, comprising a damper opening correction control unit 9 for outputting a correction signal to an FF control unit 9 based on an output signal from a unit 5.
即ち、本発明はダンパとインバータを組み合せて操作
するプロセスに対して、ダンパに対応する主制御部と、
インバータに対応する副制御部から成る基本制御系に対
して、ダンパには動特性補償分、インバータには静特性
補償分と分離することによりフィードフォワード制御を
実現させるようにした燃焼室用通風機の制御装置であり
基本制御ループ図に対して外乱信号である燃焼用空気流
量が、ダンパ用、インバータ用それぞれのFF制御部に入
力し、ダンパ用のFF制御部８は分離形FF/FB制御を適用
し、インバータ用のFF制御部９は、静特性補償分のみを
適用し、またFF制御部８ではインバータ運転中は静特性
補償分は零とし動特性補償分のみを有効とするような手
段を設ける。That is, the present invention provides a main control unit corresponding to a damper for a process in which a damper and an inverter are combined and operated.
For the basic control system consisting of the sub-control unit corresponding to the inverter, the damper is separated from the dynamic characteristic compensation component and the inverter is separated from the static characteristic compensation component, thereby realizing feedforward control of the ventilation fan for the combustion chamber. The combustion air flow rate, which is a disturbance signal with respect to the basic control loop diagram, is input to the FF control units for the damper and the inverter, and the FF control unit 8 for the damper performs the separate FF / FB control. The FF control unit 9 for the inverter applies only the static characteristic compensation component, and the FF control unit 8 sets the static characteristic compensation component to zero and only the dynamic characteristic compensation component during the inverter operation. Means are provided.
ダンパ用のFF制御部８の伝達関係はインバータ故障
時、即ち商用運転時のものを使用しインバータ用のFF制
御部９の伝達関数は、ダンパ開度が規定範囲下でのもの
を使用する。The transmission relationship of the damper FF control unit 8 is that at the time of an inverter failure, that is, that during commercial operation, and the transfer function of the inverter FF control unit 9 is that whose damper opening is within a specified range.
インバータが正常運転時は基性制御が動作し、定常的
にはダンパ開度を規定範囲にするようインバータが変化
する。この時のFF制御はダンパには「動特性補償分」イ
ンバータには「静特性補償分」が作用する。When the inverter is in normal operation, basic control operates, and the inverter constantly changes to keep the damper opening within a specified range. In the FF control at this time, the "dynamic characteristic compensation component" acts on the damper and the "static characteristic compensation component" acts on the inverter.
即ち、ダンパは燃焼用空気流量の変化に対して「動特
性補償分」の作用によりいち早く動作させることによ
り、炉内圧力の変動を押えインバータは定常的にダンパ
が落ちつく規定範囲開度になるような回転数に向って
「静特性補償分」が作用する。That is, the damper is operated quickly by the action of "dynamic characteristic compensation" for the change of the combustion air flow rate, so that the fluctuation in the furnace pressure is suppressed, and the inverter reaches a specified range where the damper constantly falls down. The "static characteristic compensation amount" acts toward an appropriate rotation speed.
インバータ故障でIDFが商用運転となり一定回転数と
なった場合にはFF制御部８での「静特性補償分」が生か
されダンパはいわゆるFF/FB制御の状態になる。If the IDF enters commercial operation due to an inverter failure and reaches a constant rotational speed, the "static characteristic compensation amount" in the FF control unit 8 is utilized to bring the damper into a so-called FF / FB control state.
FF制御の方法として、代表的な分離型FF/FB制御を図
２に示す。本制御方法の本質を理解しやすいように図式
化したものが図３である。FIG. 2 shows a typical separated FF / FB control as a method of FF control. FIG. 3 is a diagram schematically illustrating the essence of the present control method so as to be easily understood.
第３図は本発明の作用を説明するブロック図であり、
FF制御とFB制御の組み合わせを示している。FIG. 3 is a block diagram illustrating the operation of the present invention,
The combination of FF control and FB control is shown.
帰還信号PVの応答式を求めると下式の様になる。 When the response equation of the feedback signal PV is obtained, the following equation is obtained.
式（１）からPV値は目標値SVの成分と外乱Ｄ成分から構
成されている。（１）式から外乱Ｄがどの様に変化して
もPV値に影響を与えないためには GF・GP−GD＝０ が成立しなければならない。従って FFモデルGF＝GD／GP …（３） となる。また一般には各部の伝達関数を１次近似して、 が多用される。 From equation (1), the PV value is composed of the component of the target value SV and the disturbance D component. (1) G F · G P -G D = 0 must be satisfied in order to disturbance D does not affect the PV value even if any way to change from the equation. Therefore, the FF model G F = G D / G P (3). In general, the transfer function of each part is first-order approximated, Is frequently used.
このFFモデルGFを静特性補償分と動特性補償分に分離
して静特性補償分は差分をとって、速度形信号化してPI
D制御の速度形出力信号に加算する。他方の動特性補償
分はその出力に折れ線などの制限機能を入れて不感帯、
上下限制限及び方向性を持たせて制御の二ーズやプロセ
スや制約条件に合わせて、限界のチューニングができる
ようにする。This FF model G F is separated into static characteristic compensation component and dynamic characteristic compensation component static characteristic compensation component took the difference, PI and the velocity type signal of
Add to the speed control output signal of D control. The other dynamic characteristic compensation part has a dead zone by adding a limit function such as a broken line to its output.
Limits can be tuned in accordance with the needs of the control, the process, and the constraints by providing upper and lower limits and directionality.
FFモデルGFを変形すると、 ここで、かっこ中の第１項は静特性補償分を、また第
２項は動特性補償分を示し、Ｋ＝KD／KP（FFゲイン）で
ある。By transforming the FF model G F , Here, the first term in parentheses indicates the static characteristic compensation, and the second term indicates the dynamic characteristic compensation, and K = K D / K P (FF gain).
静特性補償分は外乱Ｄの影響を打ち消すための補償量
を決める機能を持ち、動特性補償分は外乱Ｄの影響を打
ち消すための補償のタイミングを合わせる機能を持って
いる。The static characteristic compensation part has a function of determining a compensation amount for canceling the influence of the disturbance D, and the dynamic characteristic compensation part has a function of adjusting the timing of compensation for canceling the influence of the disturbance D.
動特性補償分は外乱の変化時や過渡状態では出力があ
るが、定常状態では出力が零となっているため、この動
特性補償分の出力に折れ線などの制御要素を入れて、補
償の強さ、方向性、下感帯などを自由に調整できる。The dynamic characteristic compensation component has an output when the disturbance changes or in a transient state, but the output is zero in a steady state.Therefore, a control element such as a broken line is added to the dynamic characteristic compensation component to increase the compensation strength. You can freely adjust the direction, the lower zone, etc.
本発明はボイラの炉内圧力制御に限ったわけではなく
熱焼用空気流量制御等一般にダンパとインバータを組み
合せて操作するプロセスに適用できる。The present invention is not limited to the control of the pressure in the furnace of a boiler, but can be applied to a process in which a damper and an inverter are combined and operated in general, such as a control of an air flow rate for thermal firing.
本実施例の効果として、インバータ故障時にもダンパ
側に「静特性補償分」と「動特性補償分」の両方を作用
させることにより完全な形のFF/FB制御を継続すること
ができる。As an effect of the present embodiment, even when the inverter fails, complete FF / FB control can be continued by applying both “static characteristic compensation component” and “dynamic characteristic compensation component” to the damper side.
ダンパとインバータの組み合せ制御系においてもダン
パには「動特性補償分」インバータには「静特性補償
分」が作用することにより、炉内圧力を外乱の影響から
防ぐと同時にダンパ開度をいち早く定常状態（規定範
囲）にすることが可能となり制御性の向上がはかれる。In the combined control system of the damper and the inverter, the "dynamic characteristic compensation part" acts on the damper and the "static characteristic compensation part" acts on the inverter, thereby preventing the furnace pressure from the influence of disturbance and at the same time stabilizing the damper opening quickly. The state (specified range) can be set, and the controllability is improved.
第１図は本発明の一実施例を示す制御装置の構成図、第
２図及び第３図は制御回路の詳細な構成図である。 ５……炉内圧力制御部 ６……ダンパ開度補正制御部 8.9……FF制御部FIG. 1 is a block diagram of a control device showing an embodiment of the present invention, and FIGS. 2 and 3 are detailed block diagrams of a control circuit. 5: furnace pressure control unit 6: damper opening correction control unit 8.9: FF control unit
Claims (1)
誘引通風機と、 前記誘引通風機を駆動するインバータ装置と、 前記インバータ装置の運転を静特性補償して制御する第
１のFF制御部と、 前記気体の通風量を制御するダンパと、 前記ダンパの開度を、前記インバータ装置の正常運転時
には動特性補償のみにより制御し、前記インバータ装置
の故障時には静特性補償及び動特性補償により制御する
第２のFF制御部と、 前記燃焼室本体の圧力を検出する圧力検出器と、 前記圧力検出器からの圧力信号によって前記第２のFF制
御部に出力する炉内圧力制御部と、 前記炉内圧力制御部からの出力信号によって前記第１の
FF制御部に補正信号を出力するダンパ開度補正制御部
と、 を具備することを特徴とする燃焼室用通風機の制御装
置。1. An induction ventilator for inducing and ventilating gas in a combustion chamber body, an inverter device for driving the induction ventilator, and a first device for controlling the operation of the inverter device by compensating static characteristics. An FF control unit, a damper for controlling the flow rate of the gas, and an opening degree of the damper, which is controlled only by dynamic characteristic compensation during normal operation of the inverter device, and static characteristic compensation and dynamic characteristic when the inverter device fails. A second FF control unit that controls by compensation; a pressure detector that detects the pressure of the combustion chamber body; and a furnace pressure control unit that outputs to the second FF control unit based on a pressure signal from the pressure detector. And the first signal based on an output signal from the furnace pressure control unit.
A control device for a ventilation fan for a combustion chamber, comprising: a damper opening correction control unit that outputs a correction signal to an FF control unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2034701A JP2772097B2 (en) | 1990-02-15 | 1990-02-15 | Combustion chamber ventilator control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2034701A JP2772097B2 (en) | 1990-02-15 | 1990-02-15 | Combustion chamber ventilator control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03241221A JPH03241221A (en) | 1991-10-28 |
| JP2772097B2 true JP2772097B2 (en) | 1998-07-02 |
Family
ID=12421670
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2034701A Expired - Lifetime JP2772097B2 (en) | 1990-02-15 | 1990-02-15 | Combustion chamber ventilator control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2772097B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015210035A (en) * | 2014-04-28 | 2015-11-24 | 荏原環境プラント株式会社 | Device for adjusting pressure in furnace and method for adjusting pressure in furnace |
| JP6277873B2 (en) * | 2014-06-11 | 2018-02-14 | 三浦工業株式会社 | boiler |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5828921A (en) * | 1981-08-12 | 1983-02-21 | Toshiba Corp | Controlling device of furnace pressure |
| JPS59170702U (en) * | 1983-04-25 | 1984-11-15 | バブコツク日立株式会社 | Furnace pressure adjustable boiler equipment |
| JPS6089621A (en) * | 1983-10-21 | 1985-05-20 | Nippon Steel Corp | Airflow control method for balanced draft type boiler |
| JPS63134245U (en) * | 1987-02-19 | 1988-09-02 |
-
1990
- 1990-02-15 JP JP2034701A patent/JP2772097B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03241221A (en) | 1991-10-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA1284682C (en) | Propeller synchrophaser | |
| JP2772097B2 (en) | Combustion chamber ventilator control device | |
| US4667632A (en) | RPM control apparatus for internal combustion engine | |
| JPH0230425B2 (en) | ||
| JP2002130604A (en) | Method for controlling number of boilers in continuous control of burning rate | |
| JPS6231181B2 (en) | ||
| JPS6167103A (en) | Control device | |
| JPH11337049A (en) | Mill primary air damper control method and apparatus for pulverized coal-fired boiler | |
| JPS58123024A (en) | Boiler pressure control device | |
| JP2895950B2 (en) | Room pressure control ventilation equipment | |
| JPS6217126B2 (en) | ||
| JP3716443B2 (en) | Auxiliary steam pressure controller for soot blower | |
| JPS59183401A (en) | process control equipment | |
| JPS6021639Y2 (en) | Furnace pressure control device for combustion equipment | |
| JP2003075578A (en) | Negative pressure control device | |
| JPH03199892A (en) | Control of amount of supply gas for waste heat boiler | |
| JPH035489B2 (en) | ||
| JP2635676B2 (en) | Boiler burner air register opening control method | |
| JPH0395305A (en) | Controlling method for boiler discharged gas mixing device | |
| JPS60188731A (en) | Combustion control device | |
| JPS631603B2 (en) | ||
| JPH01131813A (en) | Furnace pressure control device | |
| JP2866171B2 (en) | Boiler gas recirculation control device | |
| JPH03137403A (en) | Pressure controller for pressure in boiler furnace | |
| JPH11337048A (en) | Mill primary air flow control method and apparatus for pulverized coal-fired boiler |