JPH0516278B2 - - Google Patents
Info
- Publication number
- JPH0516278B2 JPH0516278B2 JP58063453A JP6345383A JPH0516278B2 JP H0516278 B2 JPH0516278 B2 JP H0516278B2 JP 58063453 A JP58063453 A JP 58063453A JP 6345383 A JP6345383 A JP 6345383A JP H0516278 B2 JPH0516278 B2 JP H0516278B2
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- rotation speed
- water turbine
- generator
- transformer
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 25
- 238000001514 detection method Methods 0.000 claims description 17
- 238000006243 chemical reaction Methods 0.000 claims 1
- 239000003795 chemical substances by application Substances 0.000 description 5
- 230000001360 synchronised effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000005284 excitation Effects 0.000 description 4
- 238000002955 isolation Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000003111 delayed effect Effects 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Eletrric Generators (AREA)
Description
【発明の詳細な説明】
本発明は、水車発電機の回転数を発電機出力電
圧をもとに検出して制御に用いる水車発電機の制
御装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a control device for a water turbine generator that detects and controls the rotational speed of the water turbine generator based on the generator output voltage.
通常、水車発電機の起動及び回転数制御は第１
図に示すように水車ベーン開度を起動開度RSと
して水車を起動し、回転数Ｎがある値（定格回転
数の約80％）に達した時点で無負荷開度RNに切
替えると同時に、自動電圧調整装置（AVR）を
起動し、その制御動作で電圧Ｖを上昇させる方法
をとつている。 Normally, the startup and rotation speed control of the water turbine generator is done in the first step.
As shown in the figure, the water turbine is started with the turbine vane opening set to the starting opening RS, and when the rotation speed N reaches a certain value (approximately 80% of the rated rotation speed), it is switched to the no-load opening RN. The method is to activate an automatic voltage regulator (AVR) and increase the voltage V through its control operation.
しかし、このような方法で起動したのでは、起
動開度、無負荷開度の設定値や水位の変化により
起動モードや回転数の整定値が変動するなど好ま
しくない状態生じる。しかも、計器用変圧器の電
圧確立は水車回転数がある値に達した後、例えば
同期速度開閉器（または継電器）の動作後である
し、励磁方式が発電機の残留電圧を利用する自励
方式の場合には電圧確立が遅れ、水車同期のため
の回転数制御も遅くなり、同期並列までの時間も
長くなる。 However, starting in this manner causes undesirable conditions such as fluctuations in the starting mode and the set value of the rotation speed due to changes in the starting opening degree, the no-load opening degree setting values, and the water level. Moreover, the voltage of the instrument transformer is established after the water turbine rotation speed reaches a certain value, for example after the operation of a synchronous speed switch (or relay), and the excitation method is self-excitation using the residual voltage of the generator. In the case of this method, voltage establishment is delayed, rotation speed control for water turbine synchronization is also delayed, and it takes a long time to achieve synchronized parallelism.
本発明は上記事情に鑑みてなされたもので、水
車に連結されている電源発電機の出力電圧を取出
して回転数検出信号とし、起動から整定回転数の
安定制御を行い、計器用変圧器の電圧確立後は自
動的にその電圧を検出信号をする制御に移行させ
ることにより、水車発電機の起動動作及び時間の
安定化が図れる水車発電機の制御装置を提供する
ことを目的とする。 The present invention has been made in view of the above circumstances, and uses the output voltage of a power generator connected to a water turbine as a rotation speed detection signal, and performs stable control of the settling rotation speed from startup to a stable rotation speed of the instrument transformer. It is an object of the present invention to provide a control device for a water turbine generator that can stabilize the starting operation and time of the water turbine generator by automatically shifting the voltage to a control that outputs a detection signal after the voltage is established.
以下、本発明を図示の実施例に基づいて詳細に
説明する。 Hereinafter, the present invention will be explained in detail based on illustrated embodiments.
第２図は本発明の一実施例を示すもので、WT
は水車、AGは同期発電機（水車発電機）、TDは
前記水車WT及び発電機AGに連結された電源発
電機、CBは主遮断器、PTは前記水車発電機AG
の出力電圧を取出すための計器用変圧器、TR1は
計器用変圧器PTの２次側に接続された補助変圧
器、PGはこの変圧器TR1の出力の周波数に応じ
た周波数のパルスを発生するパルス化回路、FV
は周波数−電圧(F/V)変換器、MVRは前記水車
発電機AGの自動電圧調整装置、TR2は前記電源
発電機TDの出力電圧を回転数検出信号として取
出すための絶縁変圧器、RFはこの絶縁変圧器
TR2の２次側に接続された補助検出器で、整流回
路、平滑回路などで構成されている。RY1〜RY3
は速度継電器、Ｎは回転数計、D1及びD2は前記
Ｆ／Ｖ変換器FVの出力と補助検出部RFの出力を突
き合わせる部分に設けたダイオードであり、自動
切換回路として機能する。CNは検出信号を受け
て水車の回転数を制御する制御部である。 FIG. 2 shows an embodiment of the present invention, in which WT
is a water turbine, AG is a synchronous generator (hydrogen generator), TD is a power generator connected to the water turbine WT and generator AG, CB is a main circuit breaker, PT is the water turbine generator AG
TR 1 is an auxiliary transformer connected to the secondary side of the potential transformer PT, and PG generates pulses with a frequency corresponding to the frequency of the output of this transformer TR 1 . Pulsing circuit generated, FV
is a frequency-voltage (F/V) converter, MVR is an automatic voltage regulator for the water turbine generator AG, TR 2 is an isolation transformer for extracting the output voltage of the power generator TD as a rotation speed detection signal, RF is this isolation transformer
This is an auxiliary detector connected to the secondary side of TR 2 , and consists of a rectifier circuit, a smoothing circuit, etc. RY 1 ~ RY 3
is a speed relay, N is a tachometer, and D 1 and D 2 are diodes provided at a portion where the output of the F/V converter FV and the output of the auxiliary detector RF match, and function as an automatic switching circuit. CN is a control unit that receives the detection signal and controls the rotation speed of the water turbine.
前記補助検出部RFは第３図に示すように回転
数Ｎに対する検出電圧VTDが計器用変圧器PT側
の検出電圧V′PTと一定の関係となるようにその特
性を定める。例えば回転数Ｎが100％（同期回転）
のときの検出電圧VPTが5Vであれば、補助検出部
RF側の検出電圧VTDが、５×0.99＜VTD＜５×
0.95の範囲内で可及的に5Vに近い値となる特性
に定める。即ち、変化率が計器用変圧器PT側に
比べて僅かに小さくなる。 As shown in FIG. 3, the characteristics of the auxiliary detection section RF are determined so that the detected voltage V TD with respect to the rotation speed N has a constant relationship with the detected voltage V' PT on the voltage transformer PT side. For example, rotation speed N is 100% (synchronous rotation)
If the detection voltage V PT is 5V when
The detection voltage V TD on the RF side is 5×0.99<V TD <5×
Set the characteristics to be as close to 5V as possible within the range of 0.95. That is, the rate of change is slightly smaller than that on the voltage transformer PT side.
次に、動作について述べる。水車WTを起動す
るとその回転数が徐々に上昇し、それに伴つて電
源発電機TDの出力電圧が増大する。このときに
は計器用変圧器PTの電圧は確立されていないの
で、制御部CNには補助検出部RFの検出電圧VTD
がダイオードD2を介して供給され、これによつ
て回転数制御が行われる。 Next, the operation will be described. When the water turbine WT is started, its rotation speed gradually increases, and the output voltage of the power generator TD increases accordingly. At this time, the voltage of the potential transformer PT has not been established, so the control unit CN has the detection voltage V TD of the auxiliary detection unit RF.
is supplied via the diode D2 , thereby controlling the rotational speed.
界回転数が上昇してある値Noに達し、同期速
度開閉器が動作すると、烈磁制御が開始され、計
器用変圧器PTの電圧VPTが第３図の実線で示す
ように確立する。この後は、速度検出特性が高位
優先のたため、計器用変圧器PT側に自然移行す
る。この過程を図示すると第４図のようになる。
つまり、励磁制御が開始されるまでは検出電圧
VTDに基づいて回転数制御が行われ、励磁制御に
伴つて検出特性上自動的に計器用変圧器PT側の
検出電圧VPTに基づく制御に移行する。 When the field speed increases and reaches a certain value No, and the synchronous speed switch is operated, magnetic control is started and the voltage V PT of the potential transformer PT is established as shown by the solid line in FIG. After this, since the speed detection characteristic has high priority, it naturally shifts to the voltage transformer PT side. This process is illustrated in FIG. 4.
In other words, the detection voltage is
Rotation speed control is performed based on V TD , and along with excitation control, due to the detection characteristics, control automatically shifts to control based on the detected voltage V PT on the voltage transformer PT side.
なお、図示例では電源発電機TDに絶縁変圧器
TR1が接続されているが、直流の場合には絶縁ア
ンプに置換する。 In addition, in the illustrated example, an isolation transformer is connected to the power generator TD.
TR 1 is connected, but in the case of DC, replace it with an isolated amplifier.
以上のように本発明によれば、電源発電機の出
力電圧を取出し、回転数検出信号として利用する
ので、励磁制御開始前にも整定回転数の安定制御
（定加速度起動）が可能となり、水車の起動動作
及び時間の安定化が図れるとともに、ベーン開度
の切替え（起動開度から無負荷開度）が不要とな
るため、システム構成が簡単となり、しかも変落
差に的確に対応できる。また、検出系が２重化さ
れたことになるので、信頼性が高くなる。更に、
無負荷無励磁運転が容易となり、回転も安定する
といつた利点がある。 As described above, according to the present invention, the output voltage of the power generator is extracted and used as a rotation speed detection signal, so stable control of the settling rotation speed (constant acceleration start-up) is possible even before the start of excitation control, and the water turbine In addition to stabilizing the startup operation and time, there is no need to switch the vane opening (from the startup opening to the no-load opening), which simplifies the system configuration and allows for accurate response to head fluctuations. Furthermore, since the detection system is duplicated, reliability is increased. Furthermore,
It has the advantage of facilitating no-load, non-excitation operation and stabilizing rotation.
第１図は従来の水車発電機の起動及び回転数制
御方法を説明するための図、第２図は本発明に係
る水車発電機の制御装置の一実施例を示すブロツ
ク図、第３図は同実施例における検出部の電圧と
回転数の関係を示す特性図、第４図は動作説明図
である。
WT…水車、AG…水車発電機、TD…電源発電
機、PT…計器用変圧器、TR1…補助変圧器、
TR2…絶縁変圧器、FV…周波数−電圧変換器、
RF…補助検出部、D1及びD2…ダイオード。
FIG. 1 is a diagram for explaining a conventional method for starting and controlling the rotation speed of a water turbine generator, FIG. 2 is a block diagram showing an embodiment of a control device for a water turbine generator according to the present invention, and FIG. FIG. 4 is a characteristic diagram showing the relationship between the voltage and rotation speed of the detection unit in the same embodiment, and is an operation explanatory diagram. WT...water turbine, AG...water turbine generator, TD...power generator, PT...instrument transformer, TR 1 ...auxiliary transformer,
TR 2 ...Isolation transformer, FV...Frequency-voltage converter,
RF...auxiliary detection section, D1 and D2 ...diodes.
Claims (1)
に上昇したときに自動電圧調整装置を起動して発
電機の出力電圧を確立させ、これを計器用変圧器
を介して取り出し、周波数−電圧変換を行つて回
転数検出信号として用いる制御装置において、水
車発電機に連結されている電源発電機の出力電圧
を取り出して整流し、かつその回転数に対する変
化率が前記検出電圧の変化率より僅かに小さくな
る特性とし、これをダイオードを介して前記計器
用変圧器の検出電圧と突き合わせ、前記回転数が
所定値に上昇するまで電源発電機の出力電圧に基
づいて回転制御を行うようにしたことを特徴とす
る水車発電機の制御装置。1 Start the water wheel of the water turbine generator, and when the rotation speed rises to a predetermined value, start the automatic voltage regulator to establish the output voltage of the generator, take this out via the voltage transformer, and set the frequency - In a control device that performs voltage conversion and uses it as a rotation speed detection signal, the output voltage of a power generator connected to a water turbine generator is taken out and rectified, and the rate of change with respect to the rotation speed is greater than the rate of change of the detected voltage. This characteristic is set to become slightly smaller, and this is matched with the detected voltage of the instrument transformer via a diode, and the rotation is controlled based on the output voltage of the power generator until the rotation speed rises to a predetermined value. A control device for a water turbine generator, characterized by the following.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58063453A JPS59191496A (en) | 1983-04-11 | 1983-04-11 | Controller of water wheel generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58063453A JPS59191496A (en) | 1983-04-11 | 1983-04-11 | Controller of water wheel generator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59191496A JPS59191496A (en) | 1984-10-30 |
| JPH0516278B2 true JPH0516278B2 (en) | 1993-03-03 |
Family
ID=13229665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58063453A Granted JPS59191496A (en) | 1983-04-11 | 1983-04-11 | Controller of water wheel generator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59191496A (en) |
-
1983
- 1983-04-11 JP JP58063453A patent/JPS59191496A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59191496A (en) | 1984-10-30 |
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