JPH09209906A - Water turbine generator parallel operation processing method - Google Patents
Water turbine generator parallel operation processing methodInfo
- Publication number
- JPH09209906A JPH09209906A JP8017228A JP1722896A JPH09209906A JP H09209906 A JPH09209906 A JP H09209906A JP 8017228 A JP8017228 A JP 8017228A JP 1722896 A JP1722896 A JP 1722896A JP H09209906 A JPH09209906 A JP H09209906A
- Authority
- JP
- Japan
- Prior art keywords
- load
- guide vane
- parallel
- signal
- opening
- 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
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Landscapes
- Control Of Water Turbines (AREA)
- Control Of Eletrric Generators (AREA)
- Hydraulic Turbines (AREA)
Abstract
(57)【要約】
【課題】 水車発電機の並列運転時の制御方式が負荷制
限運転の場合は、負荷調整部２３で負荷設定を行った状
態で、ガイドベーンを起動開度から無負荷開度にして回
転速度を定格速度近くまで上げ、電圧、位相を合わせて
並列投入するが、並列投入時に負荷調整部のガイドベー
ン開度設定を投入前のガイドベーン開度に合わせる必要
がある。このとき、回転数が変動し、ＬＰＩ１７の演算
結果とガイドベーン開度検出値が一致しないと並列投入
直後の変動を来たし、スムースに負荷制限運転を移行で
きない。
【解決手段】 負荷設定変更手段１を設け、並列投入用
開閉器のオン信号が入力したとき、ガイドベーン開度検
出部２１の検出信号を取り込み、負荷調整部２３の負荷
（開度）設定を、ガイドベーン開度検出部２１の検出値
となす。
(57) [Abstract] [PROBLEMS] When the control method for parallel operation of the turbine generator is load limiting operation, the load adjustment unit 23 sets the load, and the guide vanes are opened from the opening degree without load. The rotation speed is increased to a value close to the rated speed, and the voltage and phase are adjusted in parallel, and the guide vane opening setting of the load adjustment unit must be adjusted to the guide vane opening before the injection when parallel charging is performed. At this time, the rotation speed fluctuates, and if the calculation result of the LPI 17 and the guide vane opening detection value do not match, there is a fluctuation immediately after parallel loading, and the load limiting operation cannot be smoothly transferred. SOLUTION: A load setting changing means 1 is provided, and when a turn-on signal of a parallel closing switch is input, a detection signal of a guide vane opening detection part 21 is taken in and a load (opening) setting of a load adjusting part 23 is performed. , And the detection value of the guide vane opening detection unit 21.
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、水力発電所用ディ
ジタル制御装置に関し、特に同期投入時の衝撃緩衝制御
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital control device for a hydraulic power plant, and more particularly to shock buffering control at the time of synchronous input.
【０００２】[0002]
【従来の技術】水車発電機を系統又は他の発電機と並列
運転する場合、この系統又は発電機と周波数、電圧、位
相を合わせて並列投入する。このとき、周波数の制御は
ガイドベーンの開度を調整し水車の回転速度を制御する
ことで行われる。2. Description of the Related Art When a turbine generator is operated in parallel with a system or another generator, the system, the generator, and the frequency, voltage, and phase are applied in parallel. At this time, the frequency is controlled by adjusting the opening of the guide vane and controlling the rotational speed of the water turbine.
【０００３】図２は従来のディジタル制御による回転速
度を制御する調速制御装置のブロック図を示す。同図に
おいて、１０は調速制御装置を示し、該調速制御装置１
０は、速度制御手段と、ガイドベーン制御手段を備えて
いる。速度制御手段は、速度設定部１１、水車（又は発
電機）の回転速度を検出する回転検出部１２、この回転
検出部１２の回転速度検出信号と速度設定部１１の速度
設定信号とを比較してその差を算出する第１の比較部１
３と、この第１の比較部１３の出力信号を演算する第１
のリミッタ付比例演算部１４、該演算部１４の出力信号
と回転検出部１２の出力信号を微分回路１５を介して入
力し、この両信号を比較し、その差を算出する第２の比
較部１６と、該第２の比較部１６の出力信号を比例、積
分演算するリミッタ付ＰＩ演算部１７と、該リミッタ付
ＰＩ演算部１７の出力信号を第３の比較部１８を介して
第２のリミッタ付比例演算部１９、該比例演算部１９の
ディジタルの出力信号をアナログ信号に変換してガイド
ベーン制御部２４へ出力するＤ／Ａ変換部２０とによっ
て構成され、また、ガイドベーン制御手段は、ガイドベ
ーンの開度に比例したガイドベーン開度検出信号を検出
し、その信号を第３の比較部１８に入力するガイドベー
ン開度検出部２１と、調定率を設定して設定信号を第１
の比較部１３に出力する調定率設定部２２と、負荷を調
整する上限リミッタ付きの負荷調整部２３とにより構成
されている。FIG. 2 is a block diagram of a conventional speed control device for controlling the rotational speed by digital control. In the figure, reference numeral 10 denotes a speed control device, and the speed control device 1
0 is provided with a speed control means and a guide vane control means. The speed control means compares the speed setting unit 11, the rotation detection unit 12 that detects the rotation speed of the water turbine (or the generator), the rotation speed detection signal of the rotation detection unit 12, and the speed setting signal of the speed setting unit 11. 1st comparison part 1 which calculates the difference
3 and the first to calculate the output signal of the first comparison unit 13
A proportional calculating unit with limiter 14, a second comparing unit for inputting an output signal of the calculating unit 14 and an output signal of the rotation detecting unit 12 through a differentiating circuit 15, comparing the two signals, and calculating a difference between them. 16 and a PI calculation unit 17 with a limiter for performing proportional and integral calculation of the output signal of the second comparison unit 16, and an output signal of the PI calculation unit 17 with a limiter via a third comparison unit 18 to a second The proportional calculation unit with limiter 19 and the D / A conversion unit 20 for converting the digital output signal of the proportional calculation unit 19 into an analog signal and outputting the analog signal to the guide vane control unit 24. , A guide vane opening detection signal that is proportional to the opening of the guide vane and that signal is input to the third comparison unit 18, and a setting signal that sets the adjustment ratio and sets the adjustment signal. 1
It is configured by an adjustment rate setting unit 22 for outputting to the comparison unit 13 and a load adjusting unit 23 with an upper limiter for adjusting the load.
【０００４】速度制御手段は、速度設定部１１の速度設
定信号と、フィドバック信号である回転検出部１２から
の回転速度検出信号に基づいて演算処理され、水車の回
転速度を設定された速度に自動制御する。The speed control means performs arithmetic processing based on the speed setting signal of the speed setting unit 11 and the rotation speed detection signal from the rotation detection unit 12 which is a feedback signal, and automatically sets the rotation speed of the water turbine to the set speed. Control.
【０００５】また、ガイドベーン制御手段は、負荷調整
部２３の負荷設定信号と、フィドバック信号であるガイ
ドベーン開度検出部２１からのガイドベーン開度検出信
号に基づいて演算処理され、ガイドベーンの開度を設定
開度に自動制御するものである。The guide vane control means is operated based on the load setting signal of the load adjusting section 23 and the guide vane opening detecting signal from the guide vane opening detecting section 21, which is a feedback signal, to calculate the guide vane The opening is automatically controlled to the set opening.
【０００６】[0006]
【発明が解決しようとする課題】水車発電機を並列運転
する場合は、速度制御手段によって最初ガイドベーンを
起動開度し、水車が起動した後、無負荷開度として加速
し、水車の回転速度が定格速度近くなったとき、電圧、
位相を並列相手の系統又は発電機に合わせて並列投入用
の投入開閉器を投入し、負荷制限運転の場合は、ガイド
ベーン制御手段に切り換えて負荷制限運転に移行する。When the turbine generators are operated in parallel, the speed control means first activates the guide vane to the opening degree, and after the turbine is started, the turbine is accelerated as a no-load opening and the rotational speed of the turbine is increased. Is near the rated speed, voltage,
The closing switch for parallel charging is closed according to the phase of the parallel partner system or generator, and in the case of load limiting operation, the guide vane control means is switched to shift to load limiting operation.
【０００７】このように、並列運転するときの制御方式
が負荷制限運転の場合は、負荷調整部２３であらかじめ
制限負荷が設定されており、一方、並列投入前のガイド
ベーンの開度は無負荷開度となっているので、並列投入
時には負荷調整部２３の設定負荷によるガイドベーン開
度を投入前のガイドベーンの開度に合わせる必要があ
り、並列投入前に負荷調整部２３の設定値をリミッタ付
ＰＩ演算部１７の演算結果に瞬時置き替える処理を行っ
ている。As described above, when the control method for parallel operation is load limiting operation, the load adjusting unit 23 sets the limit load in advance, while the opening degree of the guide vanes before parallel loading is no load. Since the opening is set, it is necessary to match the guide vane opening due to the set load of the load adjusting unit 23 with the opening of the guide vane before the closing when the parallel loading is performed, and the set value of the load adjusting unit 23 is set before the parallel loading. Processing for instantaneous replacement with the calculation result of the PI calculation unit with limiter 17 is performed.
【０００８】このとき、水車の回転数が変動し、リミッ
タ付ＰＩ演算部１７の演算結果が変化した後に並列投入
された場合は、図３に示すように、リミッタ付ＰＩ演算
部１７の演算結果（開度指令値）とガイドベーン開度検
出部２１の検出開度が一致しないため、ガイドベーンは
負荷調整部２３の設定値になるように動いてしまう。At this time, when the rotational speed of the water turbine fluctuates and the calculation result of the PI calculation unit 17 with limiter changes and then the parallel operation is performed, the calculation result of the PI calculation unit 17 with limiter is changed as shown in FIG. Since the (opening command value) and the detected opening of the guide vane opening detection unit 21 do not match, the guide vanes move to the set value of the load adjustment unit 23.
【０００９】図３は横軸に時間、縦軸にガイドベーンの
開度（実線が指令開度、点線が検出開度）を取ったもの
で、Ａ点で水車の回転数が変動してリミッタ付ＰＩ演算
部１７の演算結果（指令開度）が変化した後、Ｂ点で並
列投入すると、例えば、開度指令が１３％、ガイドベー
ン開度は１０％となり３％の負荷変動となる。従って、
並列直後に負荷の変動につながってしまう。これは、ガ
イドベーンが動作するまでにある程度の時間がかかるた
めに発生するものである。In FIG. 3, the horizontal axis represents time, and the vertical axis represents the opening of the guide vanes (the solid line is the command opening and the dotted line is the detected opening). After the calculation result (command opening degree) of the attached PI calculation unit 17 is changed, if parallel operation is performed at the point B, for example, the opening instruction is 13%, the guide vane opening degree is 10%, and the load variation is 3%. Therefore,
Immediately after paralleling, it leads to load fluctuation. This occurs because it takes some time for the guide vanes to operate.
【００１０】本発明は、このような従来の課題に鑑みて
なされたもので、並列投入時に負荷の変動がなく、バン
プレス（緩衝的）に制御が切り換えられるようにするこ
とを目的とする。The present invention has been made in view of such conventional problems, and an object thereof is to enable bumpless (buffering) control switching without load fluctuation during parallel loading.
【００１１】[0011]
【課題を解決するための手段】本発明において、上記の
課題を解決するための手段は、速度設定信号とフィドバ
ック信号である水車の回転速度検出信号に基づいて水車
の速度を制御する速度制御手段と、負荷調整部の負荷設
定信号とフィドバック信号であるガイドベーン開度検出
信号に基づいてガイドベーンの開度を制御するガイドベ
ーン制御手段とを備え、並列運転前は速度制御手段によ
り速度制御となし、並列投入後は負荷調整部で設定した
負荷制限運転となす水車発電機の並列運転処理方式にお
いて、前記並列投入時に、並列投入と同時に発する投入
信号により瞬時に負荷調整部の負荷設定信号を前記ガイ
ドベーン開度検出信号に置き替える負荷設定変更手段を
設ける。Means for Solving the Problems In the present invention, means for solving the above problems is speed control means for controlling the speed of a water turbine based on a speed setting signal and a rotation speed detection signal of the water wheel which is a feedback signal. And a guide vane control means for controlling the opening of the guide vanes based on the load setting signal of the load adjusting section and the guide vane opening detection signal that is a feedback signal, and speed control by the speed control means before parallel operation is performed. None, in the parallel operation processing method of the water turbine generator that performs load limiting operation set in the load adjusting unit after parallel loading, the load setting signal of the load adjusting unit is instantaneously output by the closing signal generated at the same time when the parallel loading is performed. A load setting changing unit that replaces the guide vane opening detection signal is provided.
【００１２】[0012]
【発明の実施の形態】以下、本発明を図１に示す実施の
形態に基づいて説明する。BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below based on the embodiment shown in FIG.
【００１３】本発明は並列投入時における速度制御手段
からガイドベーン開度制御手段に切換える方式に特徴を
有し、他は従来とほとんど同じであるので、図２と同一
部分又は相当部分には、これと同じ符号を付して説明を
省略する。The present invention is characterized by the method of switching from the speed control means to the guide vane opening control means at the time of parallel charging, and since it is almost the same as the conventional one, the same portion as or a portion corresponding to FIG. The same reference numerals are given and description thereof is omitted.
【００１４】しかして、図１の１はガイドベーン開度設
定信号を切換（又は変更）制御する負荷設定変更手段
で、該負荷設定変更手段１は、ガイドベーン開度検出部
２１のガイドベーン開度検出信号を取り込み、且つ並列
投入のための並列投入開閉器（図示省略）が投入したと
きに発生する投入信号５２Ｓを入力し、この投入信号５
２Ｓが入力したときに負荷調整部２３の負荷設定信号
を、ガイドベーン開度検出部２１のガイドベーン開度検
出信号に瞬時に置き替えるか又は変更する。Reference numeral 1 in FIG. 1 is load setting changing means for controlling switching (or changing) of the guide vane opening setting signal. The load setting changing means 1 opens the guide vane of the guide vane opening detecting section 21. Input signal 52S, which is generated when a parallel closing switch (not shown) for parallel closing is loaded,
When 2S is input, the load setting signal of the load adjusting unit 23 is instantly replaced with or changed to the guide vane opening detection signal of the guide vane opening detection unit 21.
【００１５】即ち、従来のように並列投入時に負荷調整
部２３の負荷設定値を並列投入時の無負荷開度設定値に
合わせるのではなく、並列投入時のガイドベーン開度値
に合わせる。That is, the load setting value of the load adjusting unit 23 is not adjusted to the no-load opening setting value when parallel loading as in the conventional case, but is adjusted to the guide vane opening value when parallel loading.
【００１６】従って、回転数が変動し、リミッタ付ＰＩ
演算部１７の演算結果が変化した後に、並列投入された
場合でもリミッタ付ＰＩ演算部１７の演算結果と、ガイ
ドベーン開度検出値とが一致するので、並列投入時の負
荷の変動は生ずることはなく、バンプレスに制御が実現
できる。Therefore, the rotational speed fluctuates, and the PI with limiter
After the calculation result of the calculation unit 17 is changed, the calculation result of the PI calculation unit with limiter 17 and the guide vane opening detection value match even if the parallel calculation is performed, so that the load fluctuation occurs when the parallel calculation is performed. Rather, bumpless control can be realized.
【００１７】[0017]
【発明の効果】以上のように本発明は、負荷制限運転モ
ードにおいて、並列投入時に負荷制限のための負荷設定
値を並列投入時のガバナ開度検出値に瞬時に合わせる
（設定変更する）ので、負荷の変動は全く生ずることな
く負荷制限運転に移行することができる。As described above, according to the present invention, in the load limiting operation mode, the load set value for load limiting at the time of parallel loading is instantly adjusted (setting is changed) to the governor opening detection value at parallel loading. It is possible to shift to the load limiting operation without any load fluctuation.
【図１】本発明の実施の形態のブロック結線図。FIG. 1 is a block connection diagram according to an embodiment of the present invention.
【図２】従来の調速装置のブロック結線図。FIG. 2 is a block connection diagram of a conventional speed governor.
【図３】従来のガバナ開度説明図。FIG. 3 is an explanatory view of a conventional governor opening degree.
１…負荷設定変更手段 １０…調速制御装置 １１…速度設定部 １２…回転検出部 １３，１６，１８…比較部 １４，１９…リミッタ付比例演算部 １５…微分回路 １７…リミッタ付ＰＩ演算部 ２０…Ｄ／Ａ変換部 ２１…ガイドベーン開度検出部 ２２…調定率設定部 ２３…負荷調整部 ２４…ガイドベーン制御部 DESCRIPTION OF SYMBOLS 1 ... Load setting change means 10 ... Speed control device 11 ... Speed setting part 12 ... Rotation detection part 13, 16, 18 ... Comparison part 14, 19 ... Proportional calculation part with limiter 15 ... Differentiation circuit 17 ... PI calculation part with limiter 20 ... D / A conversion section 21 ... Guide vane opening detection section 22 ... Adjustment rate setting section 23 ... Load adjustment section 24 ... Guide vane control section
Claims (1)
水車の回転速度検出信号に基づいて水車の速度を制御す
る速度制御手段と、負荷調整部の負荷設定信号とフィド
バック信号であるガイドベーン開度検出信号に基づいて
ガイドベーンの開度を制御するガイドベーン制御手段と
を備え、並列運転前は速度制御手段により速度制御とな
し、並列投入後は負荷調整部で設定した負荷制限運転と
なす水車発電機の並列運転処理方式において、 前記並列投入時に、並列投入と同時に発する投入信号に
より瞬時に負荷調整部の負荷設定信号を前記ガイドベー
ン開度検出信号に置き替えたことを特徴とする水車発電
機の並列運転処理方式。1. A speed control means for controlling the speed of a water turbine based on a rotation speed detection signal of the water wheel which is a speed setting signal and a feedback signal, and a guide vane opening degree detection which is a load setting signal and a feedback signal of a load adjusting section. Turbine power generation with guide vane control means for controlling the opening of the guide vanes based on the signal, speed control by speed control means before parallel operation, and load limited operation set by the load adjustment unit after parallel loading In the parallel operation processing method of the water turbine generator, the load setting signal of the load adjusting unit is instantly replaced with the guide vane opening detection signal by a closing signal generated at the same time when the parallel charging is performed. Parallel operation processing method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8017228A JPH09209906A (en) | 1996-02-02 | 1996-02-02 | Water turbine generator parallel operation processing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8017228A JPH09209906A (en) | 1996-02-02 | 1996-02-02 | Water turbine generator parallel operation processing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09209906A true JPH09209906A (en) | 1997-08-12 |
Family
ID=11938101
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8017228A Pending JPH09209906A (en) | 1996-02-02 | 1996-02-02 | Water turbine generator parallel operation processing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09209906A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013074739A (en) * | 2011-09-28 | 2013-04-22 | Hitachi Mitsubishi Hydro Corp | Speed governor for water wheel or pump water wheel |
-
1996
- 1996-02-02 JP JP8017228A patent/JPH09209906A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013074739A (en) * | 2011-09-28 | 2013-04-22 | Hitachi Mitsubishi Hydro Corp | Speed governor for water wheel or pump water wheel |
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