JPH048801B2 - - Google Patents
Info
- Publication number
- JPH048801B2 JPH048801B2 JP56116675A JP11667581A JPH048801B2 JP H048801 B2 JPH048801 B2 JP H048801B2 JP 56116675 A JP56116675 A JP 56116675A JP 11667581 A JP11667581 A JP 11667581A JP H048801 B2 JPH048801 B2 JP H048801B2
- Authority
- JP
- Japan
- Prior art keywords
- generator
- frequency
- signal
- output
- restoring
- 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
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B9/00—Safety arrangements
- G05B9/02—Safety arrangements electric
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Safety Devices In Control Systems (AREA)
- Control Of Velocity Or Acceleration (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、水車のガイドベーンを制御する電
気油圧式制御装置を有する発電機制御装置に関
し、特に電気回路の故障により電気油圧式制御器
が制御不能になつた場合でも安全側に作動するよ
うになされた発電機制御装置に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a generator control device having an electro-hydraulic control device for controlling guide vanes of a water turbine. The present invention relates to a generator control device that operates safely even in the event of loss of control.
従来のこの種の電気油圧式制御装置を使用した
発電機制御装置について第１図によりその構成の
一例を説明する。従来の例として水車用電気式調
速機の一例で説明する。図において、１は水車、
２はこの水車への流入水量を制御するガイドベー
ンの開閉用ロツド、３は水車１に直結され、駆動
される発電機、４はこの発電機の回転数、即ち出
力周波数に応じた出力を発生する指速発電機、５
はこの指速発電機の出力を入力とし、予め設定さ
れている発電機３の周波数基準値との偏差信号を
出力する周波数偏差検出器、６は周波数設定器、
７はこの周波数設定器６を駆動する電動機で、通
常は、その出力が零電位になるように位置させて
いる。８は周波数設定信号、９は指速発電機４出
力の低電圧を検出する低電圧リレー、１０は所内
交流回路、１１は指速発電機４が電圧を発生せず
低電圧リレー９が低電圧を検出した場合にメーク
する接点、１２は接点１１の逆の動作をする接
点、１３は変圧器、１４は調整抵抗器、１５はデ
イザ信号（振動信号）、１６は復原用ポテンシヨ
メータ、１７は速度垂下率設定ポテンシヨメー
タ、１８は入力信号を増巾し、極性を反転させた
出力信号を発生する演算増巾器、１９はデイザ信
号１５を入力するコイル６５Ｂ及び演算増幅器１
８の出力２７を入力するコイル６５Ｃを設けた電
気油圧式制御器、２０は負荷制限用モータ、２１
は負荷制限装置、２２は調整レバー、２８は主配
圧弁、２４は主サーボモータ、２５５はレターン
ロツド、２８は電源回路である。
An example of the configuration of a conventional generator control device using this type of electro-hydraulic control device will be explained with reference to FIG. As a conventional example, an example of an electric speed governor for a water turbine will be explained. In the figure, 1 is a water wheel;
2 is a guide vane opening/closing rod that controls the amount of water flowing into the water turbine; 3 is a generator that is directly connected to and driven by the water turbine 1; 4 generates an output according to the rotational speed of this generator, that is, the output frequency. Finger speed generator, 5
6 is a frequency deviation detector which inputs the output of this finger speed generator and outputs a deviation signal from a preset frequency reference value of the generator 3; 6 is a frequency setter;
Reference numeral 7 denotes an electric motor that drives this frequency setter 6, and is normally positioned so that its output is at zero potential. 8 is a frequency setting signal, 9 is a low voltage relay that detects the low voltage of the finger speed generator 4 output, 10 is an in-house AC circuit, and 11 is a low voltage relay 9 that detects a low voltage when the finger speed generator 4 does not generate voltage. 12 is a contact that operates in the opposite way to contact 11, 13 is a transformer, 14 is an adjustment resistor, 15 is a dither signal (vibration signal), 16 is a restoring potentiometer, 17 18 is an operational amplifier that amplifies the input signal and generates an output signal with inverted polarity; 19 is a coil 65B to which the dither signal 15 is input; and operational amplifier 1.
An electro-hydraulic controller equipped with a coil 65C inputting the output 27 of 8, 20 a load limiting motor, 21
22 is a load limiting device, 22 is an adjustment lever, 28 is a main pressure distribution valve, 24 is a main servo motor, 255 is a return rod, and 28 is a power supply circuit.
次に動作について説明する。水車発電機３軸に
直結された指速発電機４により水車発電機３の出
力周波数と同じ周波数を持つ交流電圧を得る。こ
の電圧を周波数偏差検出器５に与え、周波数基準
との偏差に従つた直流電圧にする。この電圧と周
波数設定器６の電圧とが加算され、周波数設定信
号８となるが、通常は周波数設定器６の出力は零
（周波数基準値に設定のとき）であり、周波数偏
差検出器の出力する偏差信号が周波数設定信号８
となる。この周波数設定信号８はポテンシヨメー
タ、１６，１７で得られる復原電圧２６と加えら
れ、演算増巾器１８で増幅され、電気油圧式制御
器１９の可動コイル６５Ｃに供給される。可動コ
イル６５Ｃは永久磁石の作る磁界内におかれてお
り、葉状バネで支持されているので、可動コイル
６５Ｃに流れる電流が零のときは、しばらくはそ
の支持された位置に静止しているが、電流が流れ
るとその電流の向きにしたがつて上、下に動く。
この可動コイル６５Ｃのすぐ下に油圧パイロツト
バルブが設けられており、この油圧パイロツトバ
ルブに追従する作動ピストンはコイルの動きに正
確に追従する。したがつて、この電気油圧式制御
器１９によつて演算増巾器１８の出力電流が操作
力を有する機械的動きに変換される。この電気油
圧式制御器１９で主配圧弁２３を操作し、主サー
ボモータ２４が制御され、水車に流入する水量が
開閉用ロツド２により調整されることになる。ま
た、主サーボモータ２４には復原用ポテンシヨメ
ータ１６が連動するようになつており、これから
復原の信号を取り出して演算増巾器１８に加えて
やることにより発電機３出力の安定性を得てい
る。更に電気油圧式制御器１９が油の粘性やゴミ
により吸着（ステイツク）現象を生じないように
するために所内交流回路１０か指速発電機４のい
ずれかの交流出力を接点１１，１２により選択的
に導入し、デイザ信号１５としてコイル６５Ｂに
与えている。 Next, the operation will be explained. An AC voltage having the same frequency as the output frequency of the water turbine generator 3 is obtained by a finger speed generator 4 directly connected to the three shafts of the water turbine generator. This voltage is applied to the frequency deviation detector 5 to convert it into a DC voltage according to the deviation from the frequency reference. This voltage and the voltage of the frequency setter 6 are added to form the frequency setting signal 8, but normally the output of the frequency setter 6 is zero (when set to the frequency reference value), and the output of the frequency deviation detector The deviation signal to be used is the frequency setting signal 8.
becomes. This frequency setting signal 8 is added to a restoring voltage 26 obtained by potentiometers 16 and 17, amplified by an operational amplifier 18, and supplied to a moving coil 65C of an electrohydraulic controller 19. The moving coil 65C is placed in a magnetic field created by a permanent magnet and is supported by a leaf spring, so when the current flowing through the moving coil 65C is zero, it remains stationary in its supported position for a while. When a current flows, it moves up or down depending on the direction of the current.
A hydraulic pilot valve is provided immediately below this movable coil 65C, and the actuating piston that follows this hydraulic pilot valve accurately follows the movement of the coil. The electrohydraulic controller 19 therefore converts the output current of the operational amplifier 18 into a mechanical movement with an operating force. The main pressure distribution valve 23 is operated by the electro-hydraulic controller 19, the main servo motor 24 is controlled, and the amount of water flowing into the water turbine is adjusted by the opening/closing rod 2. In addition, a restoring potentiometer 16 is linked to the main servo motor 24, and by extracting a restoring signal from this and adding it to the operational amplifier 18, the stability of the generator 3 output is obtained. ing. Furthermore, in order to prevent the electro-hydraulic controller 19 from causing a sticking phenomenon due to oil viscosity or dust, the AC output of either the in-house AC circuit 10 or the finger speed generator 4 is selected using contacts 11 and 12. The dither signal 15 is introduced into the coil 65B as a dither signal 15.
基準周波数f0のとき演算増巾器１８の入力電圧
は零であり、したがつて出力電圧２７も零とな
り、電気油圧式制御器１９の可動コイル６５Ｃに
電流は流れず、可動コイル６５Ｃは中性位置を保
つ。水車速度が基準速度より低い場合は周波数偏
差検出器５の出力周波数設定信号８が負の値にな
るので、演算増巾器１８の出力電圧は正となり、
可動コイル６５Ｃは下がり、作動ピストンの動作
により主サーボモータ２４及び開閉用ロツド２を
図示の左方向の開側に動かせ、ガイドベーンを開
く。逆に、水車速度が高くなると、周波数偏差検
出器５の出力、周波数設定信号８は正になり、可
動コイル６５Ｃは上昇し、サーボモータは上述の
説明とは逆に閉側に動く。 At the reference frequency f 0 , the input voltage of the operational amplifier 18 is zero, and therefore the output voltage 27 is also zero, and no current flows through the moving coil 65C of the electro-hydraulic controller 19, and the moving coil 65C is in the middle. Maintain sexual position. When the water turbine speed is lower than the reference speed, the output frequency setting signal 8 of the frequency deviation detector 5 becomes a negative value, so the output voltage of the operational amplifier 18 becomes positive.
The movable coil 65C is lowered, and the operation of the actuating piston moves the main servo motor 24 and the opening/closing rod 2 to the left as shown in the drawing, opening the guide vane. Conversely, when the water wheel speed increases, the output of the frequency deviation detector 5 and the frequency setting signal 8 become positive, the movable coil 65C rises, and the servo motor moves toward the closing side, contrary to the above explanation.
これ等の従来方式では、ガバナ電気回路の故障
や電源回路２８の故障、あるいは電源喪失時に
は、ガバナは制御機能を失い、電気油圧式制御器
１９の葉状バネ力のみによる不安定な状態とな
る。通常、それ等の異状を検出してユニツトトリ
ツプを行うのであるが、コイルの断線等全ての故
障を検出できなかつたり、電源喪失ではユニツト
トリツプすらできないといつた問題点があつた。
本発明は、上記従来のごとき問題点を解決しよう
とするものである。
In these conventional systems, if the governor electrical circuit fails, the power supply circuit 28 fails, or the power is lost, the governor loses its control function and becomes unstable due only to the leaf spring force of the electrohydraulic controller 19. Normally, such abnormalities are detected and a unit trip is performed, but there are problems such as not being able to detect all failures such as coil breakage, and not being able to even trip a unit if the power is lost.
The present invention attempts to solve the above-mentioned conventional problems.
この発明に係る発電機制御装置は、電気油圧式
制御器の可動コイルに常時ガイドベーンが開方向
に操作されるバイアス電位を与えるようにしたも
のである。
The generator control device according to the present invention is configured to apply a bias potential to the movable coil of the electrohydraulic controller so that the guide vanes are always operated in the opening direction.
この発明においては、常時はバイアス電位によ
り、可動コイルをバランスさせておき、異常時、
上記バランス電位の喪失により、ガイドベーンを
閉方向に操作するようにしたものである。
In this invention, the movable coil is normally balanced by a bias potential, and when an abnormality occurs,
The guide vane is operated in the closing direction due to the loss of the balance potential.
本発明の構成について、第１図の従来方式と異
なる点を第２図により説明する。第２図において
第１図と同一符号は、同一品または相当部分を示
す。第２図は、第１図の演算増巾器１８と電気油
圧式制御器１９の回路部分のみを詳細に示してい
る。図において、２０１は本発明によつて付加さ
れたダイオード、２０２は開信号調整抵抗であ
る。第１図の従来方式では電気油圧式制御器１９
の可動コイル６５Ｃは、一方を演算増巾器１８の
出力、他方をコモン線（零ボルト）に接続してい
たので、演算増巾器１８の出力が零であれば可動
コイル６５Ｃに電流は流れず電気油圧式制御器１
９は中性位置に保たれるか、わずかに閉方向に作
動していた。しかし、本発明の第２図では電気油
圧式制御器１９の可動コイル６５Ｃの他方はマイ
ナス方向に引かれ演算増巾器１８の出力が零でも
下式のような開方向電流を流す。
Regarding the configuration of the present invention, the differences from the conventional system shown in FIG. 1 will be explained with reference to FIG. 2. In FIG. 2, the same reference numerals as in FIG. 1 indicate the same items or corresponding parts. FIG. 2 shows only the circuit portions of the operational amplifier 18 and electrohydraulic controller 19 of FIG. 1 in detail. In the figure, 201 is a diode added according to the present invention, and 202 is an open signal adjustment resistor. In the conventional system shown in Fig. 1, the electro-hydraulic controller 19
The moving coil 65C had one end connected to the output of the operational amplifier 18 and the other connected to the common line (zero volts), so if the output of the operational amplifier 18 was zero, current would flow through the moving coil 65C. Electro-hydraulic controller 1
9 was kept in a neutral position or operated slightly in the closed direction. However, in FIG. 2 of the present invention, the other movable coil 65C of the electro-hydraulic controller 19 is pulled in the negative direction, and even if the output of the operational amplifier 18 is zero, an opening current as shown in the following equation flows.
V0＝０なら
ib＝ia＋ic ここで
ib＝Ｖ−Ｄ／Ｒ
Ｄ：ダイオードの順方向電圧降下
ia＝−Ｄ／Ｒ
Ｒ：６５Ｃコイルの抵抗値
Ｖ：コモン線に対するＮ極の負方向電圧
ic＝Ｖ／Ｒ
このようにガイドベーンを開く方向の信号を常
に与えておき電気油圧式制御器１９の葉状バネに
てその開信号を打消す方向、即ち、ガイドベーン
を閉じる方向に操作するよう葉状バネを調整して
バランスさせておく。そうすると、ガバナ電源喪
失やコイル断線時には電気油圧式制御器１９の可
動コイル６５Ｃに開信号が流れなくなる為に葉状
バネにより閉側に動作して水車ガイドベーンを閉
じるので安全側に制御することができる。第３図
にV0とiaの関係を示す。１は従来の特性、２は
本発明の特性を示す。即ちV0が零でもバイアス
が開方向に印加されていることを示している。 If V 0 = 0, ib = ia + ic where ib = V-D/R D: Forward voltage drop of diode ia = -D/R R: Resistance value of 65C coil V: Negative voltage of N pole with respect to common line ic =V/R In this way, a signal in the direction to open the guide vane is always applied, and the leaf spring in the electrohydraulic controller 19 cancels the opening signal, that is, the leaf spring is operated in the direction to close the guide vane. Adjust the spring to keep it balanced. Then, when the governor power is lost or the coil is disconnected, the open signal will no longer flow to the movable coil 65C of the electro-hydraulic controller 19, so the leaf spring will move to the closing side and close the water turbine guide vane, allowing safe control. . Figure 3 shows the relationship between V 0 and ia. 1 shows the conventional characteristics, and 2 shows the characteristics of the present invention. That is, it shows that even if V 0 is zero, the bias is applied in the open direction.
以上述べたように、この発明によれば電気回路
の故障により電気油圧式制御器が制御不能になつ
た場合でも確実にガイドベーンを閉方向に操作で
き、安全側に作動するようにできる。
As described above, according to the present invention, even if the electro-hydraulic controller becomes uncontrollable due to a failure in the electric circuit, the guide vane can be reliably operated in the closing direction, and the guide vane can be operated safely.
第１図は従来の水車ガバナのブロツク図の一
例、第２図は本発明による水車制御回路の一実施
例のブロツク図、第３図は本発明の動作を説明す
る特性グラフの一例である。
図において、１８…演算増巾器、１９…電気油
圧式制御器、２０１…ダイオード、２０２…調整
抵抗である。
FIG. 1 is an example of a block diagram of a conventional water turbine governor, FIG. 2 is a block diagram of an embodiment of a water turbine control circuit according to the present invention, and FIG. 3 is an example of a characteristic graph explaining the operation of the present invention. In the figure, 18... operational amplifier, 19... electro-hydraulic controller, 201... diode, 202... adjustment resistor.
Claims (1)
原用ポテンシヨメータ１６と、電気油圧式制御器
１９と、デイザ回路と、サーボモータとを有し、 指速発電機４は、発電機３に直結され、発電機
３の周波数に応じた出力を発生するものであり、 周波数偏差検出器５は、上記発電機３の周波数
基準が設定されており、上記指速発電機４の出力
と上記周波数基準との偏差信号を発生するもので
あり、 復原用ポテンシヨメータ１６は、復原信号が設
定されており、 電気油圧式制御器１９は、永久磁石と、この永
久磁石の磁場内におかれ、上記周波数偏差検出器
５の偏差信号及び上記復原用ポテンシヨメータ１
６の復原信号の加算信号と上記デイザ回路の出力
により操作される可動コイル６５Ｂ，６５Ｃと、
この可動コイル６５Ｂ，６５Ｃを支持する葉状バ
ネと、上記可動コイル６５Ｂ，６５Ｃの動きに追
従して動く作動ピストンとを有しており、 デイザ回路は、上記可動コイル６５Ｂにデイザ
信号を発生するものであり、 サーボモータ２４は、上記作動ピストンの操作
力により動作されて、上記復原用ポテンシヨメー
タ１６の出力及び上記発電機３を駆動する水車１
のガイドベーンの位置を調整するものであり、 上記可動コイル６５Ｃには常時上記ガイドベー
ンが開く方向に操作されるバイアス電位が与えら
れており、上記葉状バネでそのバイアス電位によ
る操作を打ち消す操作力を与えるように調整して
バランスさせておくことを特徴とする発電機制御
装置。[Claims] 1. Comprising a finger speed generator 4, a frequency deviation detector 5, a restoring potentiometer 16, an electro-hydraulic controller 19, a dither circuit, and a servo motor; The generator 4 is directly connected to the generator 3 and generates an output according to the frequency of the generator 3, and the frequency deviation detector 5 has a frequency standard for the generator 3 set therein, and the frequency deviation detector 5 has a frequency standard for the generator 3 set therein. It generates a deviation signal between the output of the speed generator 4 and the above frequency reference, the restoring potentiometer 16 is set with a restoring signal, and the electro-hydraulic controller 19 is connected to a permanent magnet and this The deviation signal of the frequency deviation detector 5 and the restoring potentiometer 1 are placed in the magnetic field of a permanent magnet.
moving coils 65B and 65C operated by the addition signal of the restoration signal of No. 6 and the output of the dither circuit;
The dither circuit includes a leaf spring that supports the movable coils 65B, 65C, and an actuating piston that moves following the movement of the movable coils 65B, 65C, and the dither circuit generates a dither signal to the movable coil 65B. The servo motor 24 is operated by the operating force of the operating piston to generate the output of the restoring potentiometer 16 and the water turbine 1 that drives the generator 3.
The movable coil 65C is always given a bias potential to operate the guide vane in the direction of opening, and the leaf spring cancels out the operation due to the bias potential. A generator control device characterized in that it is adjusted and balanced so as to give.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11667581A JPS5818702A (en) | 1981-07-24 | 1981-07-24 | Controlling circuit for electro-hydraulic controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11667581A JPS5818702A (en) | 1981-07-24 | 1981-07-24 | Controlling circuit for electro-hydraulic controller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5818702A JPS5818702A (en) | 1983-02-03 |
| JPH048801B2 true JPH048801B2 (en) | 1992-02-18 |
Family
ID=14693095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11667581A Granted JPS5818702A (en) | 1981-07-24 | 1981-07-24 | Controlling circuit for electro-hydraulic controller |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5818702A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019148615A (en) | 2018-02-26 | 2019-09-05 | Ｏ−ＦＩＬＭ．Ｊａｐａｎ株式会社 | Imaging lens and imaging device |
-
1981
- 1981-07-24 JP JP11667581A patent/JPS5818702A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5818702A (en) | 1983-02-03 |
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