JPS581244B2 - Turbine control device - Google Patents
Turbine control deviceInfo
- Publication number
- JPS581244B2 JPS581244B2 JP52034445A JP3444577A JPS581244B2 JP S581244 B2 JPS581244 B2 JP S581244B2 JP 52034445 A JP52034445 A JP 52034445A JP 3444577 A JP3444577 A JP 3444577A JP S581244 B2 JPS581244 B2 JP S581244B2
- Authority
- JP
- Japan
- Prior art keywords
- load
- signal
- turbine
- setting
- control device
- 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
Links
Landscapes
- Protection Of Generators And Motors (AREA)
- Control Of Eletrric Generators (AREA)
- Control Of Turbines (AREA)
Description
【発明の詳細な説明】 本発明は、タービン制御装置に関するものである。[Detailed description of the invention] The present invention relates to a turbine control device.
第１図は、タービン発電機システムの構成を示すもので
、タービン制御装置１、蒸呉発生装置２、蒸気加減弁３
、蒸気配管４、タービン５、復水管６、発電機７を有し
、タービン制御装置１では、タービン速度信号８を取込
み、それに応じて制御信号９を発生させ、蒸気発生装置
２からタービン５への蒸気流量を調整する蒸気加減弁３
の開度を制御して、発電機７の負荷を所定負荷に匍脚す
るようになっている。FIG. 1 shows the configuration of a turbine generator system, in which a turbine control device 1, a steam generator 2, a steam control valve 3
, a steam pipe 4, a turbine 5, a condensate pipe 6, and a generator 7. The turbine control device 1 receives a turbine speed signal 8, generates a control signal 9 in accordance with the signal, and transmits the control signal from the steam generator 2 to the turbine 5. Steam control valve 3 that adjusts the steam flow rate of
The load of the generator 7 is controlled to a predetermined load by controlling the opening degree of the generator 7.
第２図は、この種タービン制御装置の従来装置を示すも
のである。FIG. 2 shows a conventional turbine control device of this type.
図において、タービン速度設定信号２１とタービン速度
信号８との偏差を求め、この偏差に負荷設定信号２２を
加算し、調定率設定器２３を経て、負荷要求信号２４を
得る。In the figure, a deviation between a turbine speed setting signal 21 and a turbine speed signal 8 is determined, a load setting signal 22 is added to this deviation, and a load request signal 24 is obtained via an adjustment rate setting device 23.
この負荷要求信号２４と負荷制限信号２５とを低値優先
回路２６で比較し、小さい方の信号を選択して、蒸気加
減弁開度制御信号９を作り出す。The load request signal 24 and the load limit signal 25 are compared in a low value priority circuit 26, and the smaller signal is selected to generate the steam control valve opening control signal 9.
また、負荷設定信号２２と負荷制限信号２５の差の信号
に余裕値設定信号２７を加算して、負荷制限器設定信号
２８を求める。Further, the margin value setting signal 27 is added to the difference signal between the load setting signal 22 and the load limit signal 25 to obtain the load limiter setting signal 28.
この信号２８をモータ駆動回路２９でパルス信号に変換
した後、負荷制限器ポテンショメータ３０に送り、負荷
制限信号２５を作る。This signal 28 is converted into a pulse signal by a motor drive circuit 29 and then sent to a load limiter potentiometer 30 to generate a load limit signal 25.
第３図は、上述した負荷設定信号２２と負荷制限信号２
５との関係を示すもので、横軸に時間Ｔ、縦軸にタービ
ン負荷Ｐがとってある。FIG. 3 shows the load setting signal 22 and load limit signal 2 mentioned above.
5, with time T plotted on the horizontal axis and turbine load P plotted on the vertical axis.
第３図において、時間０からＴ２までの通常運転中は、
負荷制限信号２５が負荷設定信号２２より一定の余裕値
をもって追従し、時間Ｔ２からＴ３までの負荷設定信号
２２の急激な増加に対しては、負荷制限信号２８が負荷
設定信号２２より小さくなり、その間、一定の負荷上昇
率で制御信号９、すなわちタービン負荷が上昇し、ター
ビンにとり好ましくない急激な負荷上昇を避け、タービ
ンの保護を行なっている。In Fig. 3, during normal operation from time 0 to T2,
The load limit signal 25 follows the load setting signal 22 with a certain margin value, and when the load setting signal 22 suddenly increases from time T2 to T3, the load limit signal 28 becomes smaller than the load setting signal 22. During this time, the control signal 9, that is, the turbine load increases at a constant load increase rate, thereby protecting the turbine by avoiding a sudden load increase that is undesirable for the turbine.
ところが、このような従来の制御装置では、何らかの原
因で、負荷設定信号２２がさらに上昇した場合、本来、
負荷制限信号２５で制御信号９を抑制すべきであるにも
拘わらず、負荷制限信号２５が規定負荷上昇率で漸次増
加し、必要以上の負荷になってしまい、負荷制限器とし
ての役目を果すことができないという欠点があった。However, in such a conventional control device, if the load setting signal 22 further increases for some reason, the
Although the control signal 9 should be suppressed by the load limit signal 25, the load limit signal 25 gradually increases at a specified load increase rate, resulting in a load that is more than necessary and serves as a load limiter. The drawback was that it could not be done.
また、負荷制限器設定を電動ポテンショメータで行なっ
ているので、応答が遅く、精度が悪いという欠点があっ
た。Furthermore, since the load limiter is set using an electric potentiometer, the response is slow and the accuracy is low.
さらに、電動ポテンショメータ３０の設定値を制御する
ためのパルスを作るモータ駆動回路２９は、一定の制御
精度を必要とするため、複雑となり高価であるという欠
点があった。Furthermore, the motor drive circuit 29 that generates pulses for controlling the set value of the electric potentiometer 30 requires a certain degree of control accuracy, which has the drawback of being complicated and expensive.
本発明は、このような欠点を除去するために、負荷要求
信号の他に、別個に設定された負荷制限信号と、制御信
号に一定の余裕値を加算して得られる負荷制限追従信号
とを発生させ、これらの内の最小信号を選択して制御信
号とするように構成したタービン制御装置を提供するも
のである。In order to eliminate such drawbacks, the present invention provides, in addition to the load request signal, a separately set load limit signal and a load limit follow-up signal obtained by adding a certain margin value to the control signal. The present invention provides a turbine control device configured to generate a control signal and select the minimum signal among these signals as a control signal.
以下、本発明の実施例を図面により詳細に説明する。Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
第４図は本発明によるタービン制御装置の一実施例を示
すもので、３１は負荷制限器、３２は負荷制限器設定信
号、３３は負荷制限追従設定信号３４は負荷上昇率設定
回路、３５は低値優先回路３６は負荷制限追従制御信号
を示す。FIG. 4 shows an embodiment of the turbine control device according to the present invention, in which 31 is a load limiter, 32 is a load limiter setting signal, 33 is a load limit follow-up setting signal 34 is a load increase rate setting circuit, and 35 is a load limiter setting signal. Low value priority circuit 36 indicates a load shedding follow control signal.
このような構成において、タービン速度設定信号２１と
タービン速度信号８との偏差を調定率設定器２３を経て
、負荷設定信号２２に加算し、負荷要求信号２４を求め
、低値優先回路２６に加えている。In such a configuration, the deviation between the turbine speed setting signal 21 and the turbine speed signal 8 is added to the load setting signal 22 via the adjustment rate setting device 23 to obtain the load request signal 24, ing.
これは、第２図の従来例と本質的には同じである。This is essentially the same as the conventional example shown in FIG.
第２図と特に異なるのは、まず、第１に、負荷制限器３
１を付加し、負荷制限器設定信号３２を低値優先回路２
６に入力されていることである。What is particularly different from Fig. 2 is that, first, the load limiter 3
1 is added to the load limiter setting signal 32 to the low value priority circuit 2.
6.
第２に、蒸気加減弁開度制御信号９と余裕値設定信号２
７との和信号である負荷制限追従設定信号３３と、負荷
上昇率設定回路３４からの信号とを低値優先回路３５で
比較して、より小さい信号を負荷制限追従制御信号３６
として求め、それを低値優先回路２６に入力しているこ
とである。Second, the steam control valve opening control signal 9 and the margin setting signal 2
A low value priority circuit 35 compares the load limit follow-up setting signal 33, which is the sum signal of the load limit follow-up setting signal 33 and the signal from the load increase rate setting circuit 34, and selects the smaller signal as the load limit follow-up control signal 36.
, and inputs it to the low value priority circuit 26.
そして、低値優先回路２６では、負荷要求信号２４と負
荷制限器設定信号３２と負荷制限追従制御信号３６とを
比較し、それらの内の最小の信号を蒸偲加減弁開度制御
信号９として出力するようになっている。Then, the low value priority circuit 26 compares the load request signal 24, the load limiter setting signal 32, and the load limit follow-up control signal 36, and selects the minimum signal among them as the vapor control valve opening control signal 9. It is designed to be output.
第３に、負荷制限器３１、低値優先回路２６．３５を全
て演算増幅器等による電子回路で構成したことである。Thirdly, the load limiter 31 and the low value priority circuits 26 and 35 are all constructed from electronic circuits such as operational amplifiers.
第５図は、これらの信号２４ ，３２および３６の関係
を示すもので、横軸に時間Ｔを、縦軸にタービン負荷Ｐ
をとったものである。FIG. 5 shows the relationship between these signals 24, 32 and 36, with time T on the horizontal axis and turbine load P on the vertical axis.
This is the one taken.
以下、上述した実施例における特徴点について第５図を
参照しながら説明する。Hereinafter, the characteristic points of the above-mentioned embodiment will be explained with reference to FIG.
まず、負荷制限器３１を負荷制限追従制御回路とは別個
に設けたことにより、タービン負荷を任意に制限可能で
ある。First, by providing the load limiter 31 separately from the load limit follow-up control circuit, the turbine load can be arbitrarily limited.
例えば、第５図に示すように、時間Ｔ１からＴ２にかけ
ての負荷設定信号２２の必要以上の増加に対して、ター
ビン負荷を一定の負荷値に制限可能となり、必要以上の
負荷上昇を防止できる。For example, as shown in FIG. 5, when the load setting signal 22 increases more than necessary from time T1 to T2, it is possible to limit the turbine load to a constant load value, thereby preventing the load from increasing more than necessary.
また、負荷制限追従制御信号３６を発生する負荷追従制
御回路の働きにより、負荷制限器３１の設定範囲内で、
第５図における時間Ｔ５からＴ７までの負荷設定信号２
２の急増に対して、時間Ｔ６からＴ８までの間、一定上
昇率に抑えることができ、タービンの安全運転に寄与す
る。In addition, within the setting range of the load limiter 31, due to the function of the load follow control circuit that generates the load limit follow control signal 36,
Load setting signal 2 from time T5 to T7 in Fig. 5
2 can be suppressed to a constant rate of increase from time T6 to T8, contributing to safe operation of the turbine.
また、負荷制限追従設定信号３３を得る回路と負荷上昇
率設定回路３４とが分離されているので、追従幅の大小
等による設定信号３３の大小に拘わらず、常に一定の負
荷上昇率を有する負荷制限追従制御信号３６を得ること
ができる。In addition, since the circuit for obtaining the load limit follow-up setting signal 33 and the load increase rate setting circuit 34 are separated, the load limit follow-up setting signal 33 is separated from the load increase rate setting circuit 34. A limited follow control signal 36 can be obtained.
さらに、制御信号９と余裕値設定信号２７との和で負荷
制限追従設定信号３３を求めているので、第５図に示す
ように、時間ＯからＴ３までの間、負荷制限器３１で負
荷が制限された後、再び時間Ｔ３で負荷制限が解除され
た時の負荷の急変に拘わらず、時間Ｔ３からＴ４までの
間、負荷を一定上昇率で増加させることができる。Furthermore, since the load limit follow-up setting signal 33 is determined by the sum of the control signal 9 and the margin value setting signal 27, as shown in FIG. Regardless of the sudden change in the load when the load restriction is canceled again at time T3 after being restricted, the load can be increased at a constant rate of increase from time T3 to T4.
一方、上述した負荷制限器３１、低値優先回路２６．３
５等は全て電子回路で構成できるので、従来のような電
動ポテンショメータ等を使用する必要がなく、安価で、
制御の速応性および精度の優れた装置を得ることができ
る。On the other hand, the above-mentioned load limiter 31 and low value priority circuit 26.3
Since the 5th grade can all be configured with electronic circuits, there is no need to use conventional electric potentiometers, etc., and it is inexpensive.
A device with excellent control responsiveness and precision can be obtained.
第６図は本発明によるタービン制御装置の他の実施例を
示すもので、３７は高値優先回路、３８は負荷下降率設
定回路である。FIG. 6 shows another embodiment of the turbine control device according to the present invention, in which 37 is a high value priority circuit, and 38 is a load reduction rate setting circuit.
第６図においては、蒸気加減弁開度制御信号９と余裕値
設定信号２７とを加算して得た負荷制限追従設定信号３
３を高値優先回路３７に加え、負荷下降率設定回路３８
からの信号と比較し、大きな方を選択し、低値優先回路
３５に送っている。In FIG. 6, the load limit follow-up setting signal 3 obtained by adding the steam regulating valve opening control signal 9 and the margin setting signal 27 is shown.
3 is added to the high value priority circuit 37, and the load lowering rate setting circuit 38
The larger signal is selected and sent to the low value priority circuit 35.
このような構成により、負荷要求信号２４の急激な減少
に対しても、一定の負荷下降率に抑えることが可能とな
り、負荷の急変で生ずる熱応力によるタービン寿命の短
縮を軽減できる。With such a configuration, even when the load request signal 24 suddenly decreases, it is possible to suppress the load drop rate to a constant rate, and it is possible to reduce the shortening of the turbine life due to thermal stress caused by sudden changes in load.
なお、上述した実施例では、電子回路による電気制御装
置について示したが、機械制御装置にも同様に適用でき
ることは言うまでもない。In addition, although the above-mentioned embodiment shows an electric control device using an electronic circuit, it goes without saying that the present invention can be similarly applied to a mechanical control device.
以上述べたように本発明によれば、タービン負荷の急激
な増加を防止し、タービンのより一層の安全運転を行な
うことができる。As described above, according to the present invention, a sudden increase in turbine load can be prevented and the turbine can be operated more safely.
第１図は本発明が適用されるシステムの構成図、第２図
は従来のタービン制御装置の構成図、第３図は第２図の
動作を説明する負荷特性図、第４図は本発明によるター
ビン制御装置の一実施例の構成図、第５図は第４図の動
作を説明する負荷特性図、第６図は本発明によるタービ
ン制御装置の他の実施例の構成図を示す。
１・・・・・・タービン制御装置、４・・・・・・蒸気
加減弁、５・・・・・・タービン、８・・・・・・ター
ビン速度信号、９・・・・・・蒸気加減弁開度制御信号
、２１・・・・・・タービン速度設定信号、２２・・・
・・・負荷設定信号、２４・・・・・・負荷要求信号、
２７・・・・・・余裕値設定信号、３２・・・・・・負
荷制限器設定信号、３６・・・・・・負荷制限追従制御
信号。Fig. 1 is a block diagram of a system to which the present invention is applied, Fig. 2 is a block diagram of a conventional turbine control device, Fig. 3 is a load characteristic diagram explaining the operation of Fig. 2, and Fig. 4 is a diagram of the present invention. FIG. 5 is a load characteristic diagram explaining the operation of FIG. 4, and FIG. 6 is a block diagram of another embodiment of the turbine control device according to the present invention. 1... Turbine control device, 4... Steam control valve, 5... Turbine, 8... Turbine speed signal, 9... Steam Adjustment valve opening control signal, 21...Turbine speed setting signal, 22...
...Load setting signal, 24...Load request signal,
27...Marginal value setting signal, 32...Load limiter setting signal, 36...Load limit follow-up control signal.
Claims (1)
負荷要求信号を得る第１の手段と、負荷制限信号を設定
する第２の手段と、タービンを制御するための制御信号
に一定余裕値を加算した信号により、負荷制限追従信号
を求める第３の手段と、前記第１、第２および第３の手
段からの信号を比較し、それらの内の最小の信号を前記
制御信号として出力する第４の手段とを備えたことを特
徴とするタービン制御装置。1. A first means for obtaining a load request signal by adding a turbine speed deviation signal and a load setting signal, a second means for setting a load limit signal, and a constant margin value for a control signal for controlling the turbine. a third means for obtaining a load limit follow-up signal from the added signal; and a third means for comparing the signals from the first, second and third means and outputting the minimum signal among them as the control signal. 4. A turbine control device comprising the means of item 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP52034445A JPS581244B2 (en) | 1977-03-30 | 1977-03-30 | Turbine control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP52034445A JPS581244B2 (en) | 1977-03-30 | 1977-03-30 | Turbine control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS53120001A JPS53120001A (en) | 1978-10-20 |
| JPS581244B2 true JPS581244B2 (en) | 1983-01-10 |
Family
ID=12414432
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP52034445A Expired JPS581244B2 (en) | 1977-03-30 | 1977-03-30 | Turbine control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS581244B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57146002A (en) * | 1981-03-06 | 1982-09-09 | Toshiba Corp | Control system for turbine |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5214105A (en) * | 1975-07-23 | 1977-02-02 | Toshiba Corp | Turbine controlling device |
-
1977
- 1977-03-30 JP JP52034445A patent/JPS581244B2/en not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5214105A (en) * | 1975-07-23 | 1977-02-02 | Toshiba Corp | Turbine controlling device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS53120001A (en) | 1978-10-20 |
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