JPH10201296A - Ac excitation type generator-motor - Google Patents
Ac excitation type generator-motorInfo
- Publication number
- JPH10201296A JPH10201296A JP9004005A JP400597A JPH10201296A JP H10201296 A JPH10201296 A JP H10201296A JP 9004005 A JP9004005 A JP 9004005A JP 400597 A JP400597 A JP 400597A JP H10201296 A JPH10201296 A JP H10201296A
- Authority
- JP
- Japan
- Prior art keywords
- power
- control means
- speed
- generator motor
- controller
- 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.)
- Granted
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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、交流励磁型発電電
動装置に係り、特に交流電力系統に異常が生じたとき
に、速やかに有効電力を放出または吸収し、交流電力系
統の安定度を向上させるとともに、通常時は安定に運転
を行う交流励磁型発電電動装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an AC-excited generator-motor system, and in particular, when an abnormality occurs in an AC power system, quickly releases or absorbs active power to improve the stability of the AC power system. The present invention also relates to an AC-excited generator motor that operates stably at normal times.
【０００２】[0002]
【従来の技術】従来から、交流電力系統の負荷の急激な
増減等の変動に対処するために、交流電力系統にフライ
ホイール効果を有する同期機を接続し、そのフライホイ
ールエネルギーを放出、吸収して負荷の増減を抑制する
方法が知られている。このようなフライホイール効果を
有する交流励磁型発電電動装置を用いて電力系統の安定
度を向上させるための制御方式に関する従来例として、
特開平４−３２５８３１号公報に開示された発明が存在
する。2. Description of the Related Art Conventionally, a synchronous machine having a flywheel effect has been connected to an AC power system in order to cope with fluctuations such as a sudden increase or decrease in the load of the AC power system, and the flywheel energy is released and absorbed. There is known a method of suppressing the increase and decrease of the load. As a conventional example of a control method for improving the stability of a power system using an AC excitation type generator motor having such a flywheel effect,
There is an invention disclosed in JP-A-4-325831.
【０００３】本従来例は、電力系統に接続された交流励
磁式の可変速同期機（交流励磁型発電電動機）と、この
可変速同期機の励磁電圧の周波数と絶対値と位相（可変
速同期機の有効電力出力に対応）とを制御する励磁制御
装置とを備えている。本従来例の励磁制御装置は、励磁
電圧の絶対値と位相とを系統状態量または可変速同期機
の運転状況に合わせて制御し、励磁電圧の周波数を可変
速同期機のすべり周波数（系統電圧周波数から発電機回
転周波数を減算したもの）に合わせて制御する。In this conventional example, an AC-excited variable-speed synchronous machine (AC-excited generator motor) connected to an electric power system, the frequency, the absolute value, and the phase (variable-speed synchronous (Corresponding to the active power output of the machine). This conventional excitation control device controls the absolute value and phase of the excitation voltage in accordance with the system state quantity or the operating condition of the variable-speed synchronous machine, and adjusts the frequency of the excitation voltage to the slip frequency (system voltage) of the variable-speed synchronous machine. The control is performed according to the frequency obtained by subtracting the generator rotation frequency from the frequency.
【０００４】本従来例においては、励磁電圧の絶対値
は、可変速同期機の出力電圧または無効電力を検出し
て、その変動を抑えるように制御され、励磁電圧の位相
は、可変速同期機または電力系統に接続された発電機の
有効電力変動を抑えるように制御される。但し、上述し
たように、励磁電圧の周波数に関しては、可変速同期機
を系統電圧の位相と同期させて運転するために、可変速
同期機のすべり周波数となるように常に制御される。In this conventional example, the absolute value of the exciting voltage is controlled so as to detect the output voltage or the reactive power of the variable speed synchronous machine and suppress its fluctuation, and the phase of the exciting voltage is controlled by the variable speed synchronous machine. Alternatively, the control is performed so as to suppress the fluctuation of the active power of the generator connected to the power system. However, as described above, in order to operate the variable speed synchronous machine in synchronization with the phase of the system voltage, the frequency of the excitation voltage is always controlled to be the slip frequency of the variable speed synchronous machine.
【０００５】本従来例によれば、交流電力系統の異常時
の電力動揺等を検出し、可変速同期機の出力電圧、有効
電力を高速に制御することにより、交流電力系統の安定
を図ることができる。しかし、本従来例は、交流電力系
統の異常時以外の通常の待機運転時の交流励磁型発電電
動装置の運用方法、及び回転エネルギーの放出、吸収後
の待機運転状態への移行方法については何ら開示するも
のではない。According to this conventional example, the fluctuation of the AC power system at the time of abnormality is detected, and the output voltage and active power of the variable speed synchronous machine are controlled at high speed, thereby stabilizing the AC power system. Can be. However, in this conventional example, there is no description about the method of operating the AC excitation type generator-motor during normal standby operation other than when the AC power system is abnormal, and the method of releasing rotational energy and shifting to the standby operation state after absorption. Not disclosed.
【０００６】[0006]
【発明が解決しようとする課題】原動機を持たないフラ
イホイール発電機の場合、系統安定化運転（電力の急放
出、吸収時）以外の待機運転中の速度が可変速同期機の
許容する可変速制御範囲内から逸脱すると、制御範囲内
への回復が難しく、いかにして可変速範囲内から逸脱し
ないように速度制御するかが問題となる。In the case of a flywheel generator having no prime mover, the speed during standby operation other than the system stabilization operation (during rapid release and absorption of power) is controlled by the variable speed permitted by the variable speed synchronous machine. If the vehicle deviates from the control range, it is difficult to recover the vehicle within the control range, and there is a problem how to control the speed so as not to deviate from the variable speed range.
【０００７】本発明は、原動機を持たないフライホイー
ル発電機のように、回転子の回転速度の急変が許容で
き、かつ原動機を持たないために待機運転時の回転速度
制御が困難なシステムにおける交流電力系統の安定化性
能の向上を目的とする。そのために、交流電力系統の異
常時に有効電力を高速で吸収、放出でき、かつ交流励磁
型発電電動機の待機運転時においては、回転子の回転速
度が許容範囲内を逸脱することなく安定に運転できる交
流励磁型発電電動装置を提供することを目的とする。[0007] The present invention relates to an alternating current in a system such as a flywheel generator having no prime mover, in which a rapid change in the rotational speed of a rotor can be tolerated and the rotational speed control during standby operation is difficult due to having no prime mover. The aim is to improve the stabilization performance of the power system. Therefore, the active power can be absorbed and released at high speed when the AC power system is abnormal, and can be operated stably without the rotation speed of the rotor deviating from the allowable range during the standby operation of the AC excitation type generator motor. An object of the present invention is to provide an AC excitation type generator motor.
【０００８】[0008]
【課題を解決するための手段】本発明の交流励磁型発電
電動装置は、交流電力系統と、一次巻線及び二次巻線を
有し、一次巻線が交流電力系統に接続された交流励磁型
発電電動機と、交流電力系統から変圧器を介して給電さ
れ、その出力側が交流励磁型発電電動機の二次巻線に接
続され可変周波数の交流電流を交流励磁型発電電動機に
給電する電力変換装置と、この電力変換装置に接続され
この電力変換装置に電流指令信号を出力する電流制御器
と、交流励磁型発電電動機の回転速度を検出する速度検
出器と、交流電力系統と交流励磁型発電電動機との間で
やり取りされる有効電力を検出する電力検出器とを備え
た交流励磁型発電電動装置において、電力検出器の検出
した有効電力と有効電力指令値との偏差を低減するよう
に電力変換装置を制御する第１の制御手段と、速度検出
器の検出した速度と速度指令値との偏差を低減するよう
に電力変換装置を制御する第２の制御手段と、交流電力
系統における異常を示す系統異常信号を検知するととも
に、検知した系統異常信号の有無に応じて第１の制御手
段と第２の制御手段とを選択するための選択信号を出力
する系統異常検出手段と、この系統異常検出手段の出力
する選択信号に応じて第１の制御手段と第２の制御手段
とを切り替えて電力変換装置に接続する切替手段とを備
えたものである。これにより、交流励磁型発電電動機の
待機運転時には回転速度を制御する第２の制御手段によ
り速度制御を行い、交流励磁型発電電動機の安定な運転
を実現でき、交流電力系統に異常が発生した場合には、
交流励磁型発電電動機の有効電力を制御する第１の制御
手段により有効電力制御を行い、交流励磁型発電電動機
から有効電力を急激に放出、吸収して交流電力系統の安
定度を向上させることができる。SUMMARY OF THE INVENTION An AC-excited generator motor of the present invention has an AC power system, a primary winding and a secondary winding, and the AC excitation is connected to the AC power system. Power generator that is supplied with power from the AC power system via a transformer, and whose output side is connected to the secondary winding of the AC excitation generator motor, and supplies variable-frequency AC current to the AC excitation generator motor. A current controller connected to the power converter and outputting a current command signal to the power converter, a speed detector for detecting the rotation speed of the AC excitation generator motor, an AC power system and the AC excitation generator motor And a power detector for detecting an active power exchanged between the active power generator and the power converter so as to reduce a deviation between the active power detected by the power detector and the active power command value. Equipment A first control means for controlling the power converter, a second control means for controlling the power conversion device so as to reduce a deviation between the speed detected by the speed detector and the speed command value, and a system abnormality indicating an abnormality in the AC power system. A system abnormality detecting means for detecting a signal and outputting a selection signal for selecting the first control means and the second control means in accordance with the presence or absence of the detected system abnormality signal; Switching means for switching between the first control means and the second control means in accordance with the selection signal to be output and connecting to the power converter. Thus, during standby operation of the AC-excited generator motor, speed control is performed by the second control means for controlling the rotation speed, and stable operation of the AC-excited generator motor can be realized, and when an abnormality occurs in the AC power system, In
Active power control is performed by first control means for controlling the active power of the AC excitation type generator motor, and the active power is rapidly released and absorbed from the AC excitation type generator motor to improve the stability of the AC power system. it can.
【０００９】また、第１の制御手段と第２の制御手段
を、それぞれ、互いに利得の異なる複数の制御手段によ
り構成し、切替手段は、第１の制御手段と第２の制御手
段の複数の制御手段中から互いに利得が異なる制御手段
を第１の制御手段及び第２の制御手段として選択して複
数の制御手段を切り替えて電力変換装置に接続するよう
にしたものである。これにより、速度制御と電力制御と
の間の滑らかな切り替えを行うことができる。Further, the first control means and the second control means are respectively constituted by a plurality of control means having different gains from each other, and the switching means comprises a plurality of the first control means and the plurality of second control means. Control means having different gains are selected from the control means as a first control means and a second control means, and a plurality of control means are switched to be connected to a power converter. Thus, smooth switching between speed control and power control can be performed.
【００１０】[0010]
【発明の実施の形態】以下、図面を参照しながら、本発
明の一実施の形態を説明する。図１は、本発明の第１の
実施の形態の全体構成を示すブロック図である。図にお
いて、交流電力系統１には、交流励磁型発電電動機２の
固定子、変圧器４の一次側端子、電圧変成器１７及び電
流変成器１８の一次側端子がそれぞれ並列接続されてい
る。電圧変成器１７と電流変成器１８との二次側端子は
電力検出器７の２個の入力端子にそれぞれ接続され、電
力検出器７の２個の出力端子は、それぞれ減算器１９，
２１のマイナス側入力端子に接続されて、検出した有効
電力Ｐと電圧Ｖとをそれぞれ減算器１９，２１に入力す
る。減算器１９のプラス側入力端子には有効電力指令値
Ｐ０が、減算器２１のプラス側入力端子には電圧設定値
Ｖ０がそれぞれ外部から入力される。減算器１９の出力
端子は、有効電力Ｐと有効電力指令値Ｐ０との偏差を低
減するように交流励磁型発電電動機２の有効電力を調整
する電力制御器８の入力端子に接続され、減算器２１の
出力端子は、交流電力系統１の電圧設定値又は交流励磁
型発電電動機２の無効電力指令値と検出値との偏差を低
減するように調整する電圧（無効電力）制御器１３の入
力端子に接続されている。An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the overall configuration of the first embodiment of the present invention. In the figure, to an AC power system 1, a stator of an AC excitation type generator motor 2, a primary terminal of a transformer 4, a primary terminal of a voltage transformer 17 and a primary terminal of a current transformer 18 are respectively connected in parallel. The secondary terminals of the voltage transformer 17 and the current transformer 18 are connected to two input terminals of the power detector 7, respectively, and two output terminals of the power detector 7 are connected to a subtractor 19, respectively.
The active power P and the voltage V are connected to the minus input terminal of the subtractor 21 and input to the subtracters 19 and 21, respectively. An active power command value P0 is input to the positive input terminal of the subtractor 19, and a voltage set value V0 is input to the positive input terminal of the subtracter 21 from the outside. The output terminal of the subtractor 19 is connected to the input terminal of the power controller 8 that adjusts the active power of the AC excitation type generator motor 2 so as to reduce the deviation between the active power P and the active power command value P0. An output terminal 21 is an input terminal of a voltage (reactive power) controller 13 that adjusts a voltage set value of the AC power system 1 or a deviation between a reactive power command value of the AC excitation type generator motor 2 and a detected value to reduce the deviation. It is connected to the.
【００１１】交流励磁型発電電動機２の軸２２には、回
転子位相検出器１５と速度検出器５とが接続され、速度
検出器５の出力端子はもう１個の減算器２０のマイナス
側入力端子に接続されている。減算器２０のプラス側入
力端子には回転速度指令値Ｎ０が外部から入力され、減
算器２０の出力端子は、交流励磁型発電電動器２の回転
子の回転速度Ｎと回転速度指令値Ｎ０との偏差を低減す
るように交流励磁型発電電動器２の回転子の回転速度Ｎ
を調整する速度制御器６の入力端子に接続されている。
電力制御器８と速度制御器６の出力端子は、系統異常検
出器１０から出力される選択信号により開閉制御される
切替器１２，１１の一方の端子にそれぞれ接続され、切
替器１２，１１の他方の端子は、交流励磁型発電電動機
２の２次側各相の電流指令値Ｉａ＊，Ｉｂ＊，Ｉｃ＊を
演算する電流制御器９の第１の入力端子に接続されてｑ
軸成分電流Ｉｑ（交流励磁型発電電動機２の２次電流の
うち１次側から見て交流電力系統１の電圧位相に等しい
成分）を電流制御器９に入力する。電流制御器９の第２
の入力端子は電圧制御器１３の出力端子に接続され、電
圧制御器１３からｄ軸成分電流Ｉｄ（交流励磁型発電電
動機２の２次電流のうち１次側から見て交流電力系統１
の電圧位相とπ／２だけ位相の異なる成分）が電流制御
器９に入力される。A rotor 22 and a speed detector 5 are connected to a shaft 22 of the AC excitation type generator motor 2, and an output terminal of the speed detector 5 is connected to a minus input of another subtractor 20. Connected to terminal. A rotation speed command value N0 is externally input to a plus-side input terminal of the subtractor 20, and an output terminal of the subtractor 20 outputs a rotation speed N of the rotor of the AC excitation type generator motor 2 and a rotation speed command value N0. Of the rotor of the AC-excited generator motor 2 so as to reduce the deviation of
Is connected to the input terminal of the speed controller 6 for adjusting the speed.
Output terminals of the power controller 8 and the speed controller 6 are respectively connected to one terminals of switches 12 and 11 that are controlled to open and close by a selection signal output from the system abnormality detector 10. The other terminal is connected to a first input terminal of a current controller 9 for calculating a current command value Ia *, Ib *, Ic * of each phase on the secondary side of the AC excitation type generator motor 2 and q
The shaft component current Iq (a component of the secondary current of the AC excitation type generator motor 2 that is equal to the voltage phase of the AC power system 1 when viewed from the primary side) is input to the current controller 9. Second of current controller 9
Is connected to the output terminal of the voltage controller 13, and the voltage controller 13 outputs the d-axis component current Id (of the secondary current of the AC excitation type generator motor 2 from the primary side as viewed from the primary side).
(A component having a phase different from that of the voltage phase by π / 2) is input to the current controller 9.
【００１２】回転子位相検出器１５の出力端子は、交流
電力系統１の電圧位相と交流励磁型発電電動機２の電気
角で表した回転角との差に等しいすべり位相を演算する
位相検出器１６の第１の入力端子に接続され、回転子位
相検出器１５で検出した回転角θｒが位相検出器１６に
入力される。電圧変成器１７の二次側端子には電力検出
器７と並列に系統電圧位相演算器１４の入力端子が接続
されており、系統電圧位相演算器１４の出力端子は位相
検出器１６の第２の入力端子に接続されて系統電圧位相
演算器１４から位相検出器１６に電圧位相θｖが入力さ
れる。位相検出器１６の出力端子は電流制御器９の第３
の入力端子に接続され、位相検出器１６の出力信号ｃｏ
ｓθｓとｓｉｎθｓとが電流制御器９に入力される。An output terminal of the rotor phase detector 15 is provided with a phase detector 16 for calculating a slip phase equal to the difference between the voltage phase of the AC power system 1 and the rotation angle expressed by the electrical angle of the AC excitation type generator motor 2. And the rotation angle θr detected by the rotor phase detector 15 is input to the phase detector 16. The input terminal of the system voltage phase calculator 14 is connected to the secondary terminal of the voltage transformer 17 in parallel with the power detector 7, and the output terminal of the system voltage phase calculator 14 is the second terminal of the phase detector 16. Is input from the system voltage phase calculator 14 to the phase detector 16. The output terminal of the phase detector 16 is the third terminal of the current controller 9.
And the output signal co of the phase detector 16
sθs and sinθs are input to the current controller 9.
【００１３】電流制御器９の第４の入力端子兼出力端子
は、交流励磁電流の位相を変化させることにより交流励
磁型発電電動機２の出力を増減させるサイクロコンバー
タなどの電力変換装置３の第１の出力端子兼入力端子に
接続され、電流制御器９と電力変換装置３とは相互に信
号のやり取りを行う。電力変換装置３の第２の入力端子
は変圧器４の２次側端子に接続されている。電力変換装
置３の第３の入力端子及び第２の出力端子はともに交流
励磁型発電電動機２の回転子に接続され、交流励磁型発
電電動機２の回転子の出力電流Ｉｍａ，Ｉｍｂ，Ｉｍｃ
を検出するとともに、交流励磁型発電電動機２の出力を
増減させることができるように接続されている。A fourth input / output terminal of the current controller 9 is connected to a first terminal of the power converter 3 such as a cycloconverter for increasing or decreasing the output of the AC excitation type generator motor 2 by changing the phase of the AC excitation current. The current controller 9 and the power converter 3 exchange signals with each other. A second input terminal of the power converter 3 is connected to a secondary terminal of the transformer 4. The third input terminal and the second output terminal of the power conversion device 3 are both connected to a rotor of the AC excitation type generator motor 2, and output currents Ima, Imb, Imc of the rotor of the AC excitation type generator motor 2.
Is detected, and the output of the AC excitation type generator motor 2 can be increased or decreased.
【００１４】次の本実施の形態の動作を説明する。ま
ず、電力検出器７は、電圧変成器１７と電流変成器１８
を介して入力される交流電力系統１の電圧Ｖと電流Ｉと
に基づいて有効電力Ｐを検出する。電力検出器７で検出
された有効電力Ｐは減算器１９のマイナス側入力端子に
入力され、減算器１９のプラス側入力端子に外部から入
力される有効電力指令値Ｐ０との差が演算される。減算
器１９で演算された有効電力指令値Ｐ０と有効電力Ｐと
の偏差は電力制御器８に入力され、電力制御器８では入
力された偏差に基づき、この偏差を低減するようなｑ軸
成分電流Ｉｑの指令値を電流制御器９に出力する。Next, the operation of the present embodiment will be described. First, the power detector 7 includes a voltage transformer 17 and a current transformer 18.
The active power P is detected based on the voltage V and the current I of the AC power system 1 input through the AC power system 1. The active power P detected by the power detector 7 is input to the negative input terminal of the subtractor 19, and the difference between the active power P and the active power command value P0 externally input to the positive input terminal of the subtractor 19 is calculated. . The deviation between the active power command value P0 and the active power P calculated by the subtractor 19 is input to the power controller 8, and the power controller 8 performs q-axis component reduction based on the input deviation. The command value of the current Iq is output to the current controller 9.
【００１５】一方、交流励磁型発電電動機２の回転子の
回転速度Ｎが速度検出器５で検出され、減算器２０のマ
イナス側入力端子に入力される。減算器２０のプラス側
入力端子には外部から回転速度指令値Ｎ０が入力され、
この回転速度指令値Ｎ０と速度検出器５で検出された回
転速度Ｎとの偏差が減算器２０により減算され、速度制
御器６に入力される。速度制御器６では入力された偏差
に基づき、この偏差を低減するようなｑ軸成分電流Ｉｑ
の指令値を電流制御器９に出力する。On the other hand, the rotational speed N of the rotor of the AC excitation generator motor 2 is detected by the speed detector 5 and is input to the minus input terminal of the subtractor 20. The rotation speed command value N0 is input to the plus side input terminal of the subtractor 20 from the outside,
The difference between the rotation speed command value N0 and the rotation speed N detected by the speed detector 5 is subtracted by the subtractor 20 and input to the speed controller 6. On the basis of the input deviation, the speed controller 6 reduces the q-axis component current Iq so as to reduce the deviation.
Is output to the current controller 9.
【００１６】交流励磁型発電電動機２の回転子の回転角
θｒは、回転子位相検出器１５で検出され位相検出器１
６に入力される。位相検出器１６には、電圧変成器１７
により検出され系統電圧位相演算器１４により演算され
た交流電力系統１の電圧位相θｖも入力され、交流電力
系統１の電圧位相θｖと交流励磁型発電電動機２の電気
角で表した回転角θｒとの差に等しいすべり位相θｓ
（θｓ＝θｖ−θｒ）が位相検出器１６により演算さ
れ、位相検出器１６からその余弦成分（ｃｏｓθｓ）と
正弦成分（ｓｉｎθｓ）とが電流制御器９に出力され
る。The rotation angle θr of the rotor of the AC excitation type generator motor 2 is detected by a rotor phase detector 15 and detected by the phase detector 1.
6 is input. The phase detector 16 includes a voltage transformer 17
, The voltage phase θv of the AC power system 1 calculated by the system voltage phase calculator 14 is also input, and the voltage phase θv of the AC power system 1 and the rotation angle θr represented by the electrical angle of the AC excitation type generator motor 2 are calculated. Slip phase θs equal to the difference
(Θs = θv−θr) is calculated by the phase detector 16, and the cosine component (cos θs) and the sine component (sin θs) are output from the phase detector 16 to the current controller 9.
【００１７】電力検出器７から出力された交流電力系統
１の電圧Ｖは、減算器２１のマイナス側入力端子に入力
され、減算器２１のプラス側入力端子に外部から入力さ
れる電圧設定値Ｖ０との差が演算される。減算器２１で
演算された電圧設定値Ｖ０と交流電力系統１の電圧Ｖと
の偏差は電圧制御器１３に入力され、電圧制御器１３で
は入力された偏差に基づき、この偏差を低減するような
ｄ軸成分電流Ｉｄの指令値を電流制御器９に出力する。The voltage V of the AC power system 1 output from the power detector 7 is input to a minus input terminal of the subtractor 21 and a voltage set value V0 externally input to a plus input terminal of the subtracter 21. Is calculated. The deviation between the voltage set value V0 calculated by the subtractor 21 and the voltage V of the AC power system 1 is input to the voltage controller 13, and the voltage controller 13 reduces the deviation based on the input deviation. The command value of the d-axis component current Id is output to the current controller 9.
【００１８】電流制御器９では、位相制御器１６からの
入力される余弦成分ｃｏｓθｓ，正弦成分ｓｉｎθｓ
と、速度制御器６又は電力制御器８から入力されるｑ軸
成分電流Ｉｑの指令値と、電圧制御器１３から入力され
るｄ軸成分電流Ｉｄの指令値とに基づき、次の演算式
（１）に従って、交流励磁型発電電動機２の２次側各相
の電流指令値Ｉａ＊，Ｉｂ＊，Ｉｃ＊を演算する。但
し、演算式（１）においてＫは定数を表す。The current controller 9 includes a cosine component cos θs and a sine component sin θs input from the phase controller 16.
And the command value of the q-axis component current Iq input from the speed controller 6 or the power controller 8 and the command value of the d-axis component current Id input from the voltage controller 13, the following arithmetic expression ( According to 1), the current command values Ia *, Ib *, Ic * of each phase on the secondary side of the AC excitation type generator motor 2 are calculated. Here, K represents a constant in the arithmetic expression (1).
【００１９】[0019]
【数１】 (Equation 1)
【００２０】電流制御器９は、上記演算により求めた電
流指令値Ｉａ＊，Ｉｂ＊，Ｉｃ＊を電力変換装置３の検
出した交流励磁型発電電動機２の回転子の出力電流Ｉｍ
ａ，Ｉｍｂ，Ｉｍｃと比較し、両者の偏差が低減するよ
うに電力変換装置３を制御する。このように制御するこ
とにより、交流励磁型発電電動機２の出力電圧は常に系
統電圧位相と同期し、ｑ軸成分電流Ｉｑの指令値により
交流励磁型発電電動機２の有効電力出力を、ｄ軸成分電
流Ｉｄの指令値により交流励磁型発電電動機２の発電機
電圧又は無効電力を制御することができる。The current controller 9 outputs the current command values Ia *, Ib *, and Ic * obtained by the above-described calculation to the output current Im of the rotor of the AC-excited generator motor 2 detected by the power converter 3.
a, Imb, and Imc, and controls the power conversion device 3 so that the deviation between them is reduced. By performing such control, the output voltage of the AC-excited generator motor 2 is always synchronized with the system voltage phase, and the active power output of the AC-excited generator motor 2 is changed by the command value of the q-axis component current Iq to the d-axis component. The generator voltage or the reactive power of the AC excitation type generator motor 2 can be controlled by the command value of the current Id.
【００２１】交流励磁型発電電動機２が待機運転してい
る状態では、切替器１１を閉路し、切替器１２を開路す
ることにより、速度制御器６の出力信号により交流励磁
型発電電動機２の位相制御を行い、速度検出器５で検出
する回転速度Ｎと回転速度指令値Ｎ０との偏差を低減す
るように交流励磁型発電電動機２を制御し、交流励磁型
発電電動機２の速度制御運転が行われる。When the AC-excited generator motor 2 is in standby operation, the switch 11 is closed and the switch 12 is opened, and the phase of the AC-excited generator motor 2 is determined by the output signal of the speed controller 6. The AC excitation type generator motor 2 is controlled so as to reduce the deviation between the rotation speed N detected by the speed detector 5 and the rotation speed command value N0, and the speed control operation of the AC excitation type generator motor 2 is performed. Will be
【００２２】次に、系統事故、事故相除去、高速再閉路
のような交流電力系統の異常が発生した場合には、系統
異常検出器１０は、例えば事故相除去の際に遮断される
遮断器接点信号などの系統異常信号を受けて切替器１
１，１２の選択信号を出力する。この選択信号により、
切替器１１が開路され、切替器１２が閉路される。これ
により、電力制御器８の出力信号が電流制御器９に入力
され、電力制御器８からの出力信号により交流励磁型発
電電動機２の交流励磁電流の位相制御が行われる。この
位相制御においては、電力検出器７で検出する交流電力
系統１から供給される有効電力Ｐと外部から与えられる
有効電力指令値Ｐ０との偏差を低減するように交流励磁
型発電電動機２を制御し、交流励磁型発電電動機２の有
効電力制御運転が行われる。このときの有効電力指令値
Ｐ０は、交流電力系統１上の他の発電機の有効電力動揺
を抑えるように与えられ、交流励磁型発電電動機２が有
効電力指令値Ｐ０に対して高速に有効電力制御を行うこ
とにより、他の発電機の有効電力動揺の抑制が可能とな
る。この場合、交流励磁型発電電動機２は有効電力を放
出又は吸収するため、その回転子の回転速度が低下又は
上昇する。Next, when an abnormality in the AC power system such as a system fault, fault phase elimination, or high-speed reclosing occurs, the system fault detector 10 is connected, for example, to a circuit breaker that is cut off when the fault phase is removed. Switch 1 upon receiving a system abnormal signal such as a contact signal
1 and 12 are output. With this selection signal,
The switch 11 is opened and the switch 12 is closed. Thereby, the output signal of the power controller 8 is input to the current controller 9, and the phase control of the AC excitation current of the AC excitation type generator motor 2 is performed by the output signal from the power controller 8. In this phase control, the AC excitation generator motor 2 is controlled so as to reduce the deviation between the active power P supplied from the AC power system 1 detected by the power detector 7 and the active power command value P0 given from the outside. Then, the active power control operation of the AC excitation type generator motor 2 is performed. The active power command value P0 at this time is given so as to suppress the fluctuation of the active power of the other generators on the AC power system 1, and the AC excitation type generator motor 2 is activated at a high speed with respect to the active power command value P0. By performing the control, it is possible to suppress the fluctuation of the active power of another generator. In this case, the AC-excited generator motor 2 emits or absorbs active power, so that the rotation speed of its rotor decreases or increases.
【００２３】図２は、交流電力系統１に異常が発生した
時の本実施の形態の交流励磁型発電電動装置の各部の動
作を示すタイミングチャートである。図２（１）は事故
相の系統異常信号の状態を示し、系統異常の発生した時
刻ｔ1に事故相の遮断器が断となる。なお、事故相の遮
断器は所定の時間、例えば１秒間、の後に自動的に回復
する。FIG. 2 is a timing chart showing the operation of each part of the AC excitation type generator motor according to the present embodiment when an abnormality occurs in the AC power system 1. Figure 2 (1) shows the state of the system abnormality signal fault phase, breaker fault phase is cross time t 1 that occurred in system abnormality. Note that the breaker in the accident phase automatically recovers after a predetermined time, for example, one second.
【００２４】図２の（２）は、本実施の形態の系統異常
検出器１０から出力される選択信号の状態を示し、系統
異常の発生した時刻ｔ1にオンとなり、系統異常検出器
１０内のタイマにより設定された所定の時間後（時刻ｔ
2）にオフとなる。FIG. 2B shows the state of the selection signal output from the system abnormality detector 10 according to the present embodiment. The selection signal is turned on at the time t 1 at which the system abnormality has occurred. After a predetermined time set by the timer (time t
2 ) Turn off.
【００２５】図２の（３）及び（４）は、それぞれ、本
実施の形態の切替器１１，１２の状態を示し、選択信号
がオンの間、切替器１１はオフ状態、切替器１２はオン
状態となる。この期間中は、本実施の形態の交流励磁型
発電電動機２は有効電力制御となり、有効電力指令値Ｐ
０に従った有効電力を交流電力系統１に放出、吸収す
る。この交流励磁型発電電動機２の有効電力の放出、吸
収状態を図２の（５）に示す。図２の（５）の場合は、
有効電力を吸収する場合を示しており、電力吸収に従
い、図２の（６）に示すように、交流励磁型発電電動機
２の回転速度Ｎは上昇する。FIGS. 2 (3) and (4) show the states of the switches 11 and 12 of the present embodiment, respectively. While the selection signal is on, the switch 11 is off and the switch 12 is off. It turns on. During this period, the AC-excited generator motor 2 of the present embodiment is in active power control, and the active power command value P
The active power according to 0 is released and absorbed into the AC power system 1. FIG. 2 (5) shows the state of emission and absorption of the active power of the AC excitation type generator motor 2. In the case of (5) in FIG.
This shows a case where active power is absorbed, and the rotational speed N of the AC excitation type generator motor 2 increases as shown in (6) of FIG. 2 according to the power absorption.
【００２６】時刻ｔ2において選択信号がオフとなる
と、切替器１１はオン、切替器１２はオフに戻り、交流
励磁型発電電動機２は速度制御に戻り、回転速度指令値
Ｎ０に従って回転する。この時点では、交流励磁型電動
機２の回転速度は回転速度指令値Ｎ０よりも高くなって
いるので、本実施の形態の交流励磁型発電電動装置の有
効電力は発電方向（有効電力放出方向）に制御され、交
流励磁型発電電動機２の回転速度が徐々に回転速度指令
値Ｎ０まで減速され、待機運転状態に戻る。[0026] When the selection signal at time t 2 is turned off, switch 11 is turned on, the switch 12 returns to the off, the AC-excited generator motor 2 returns to the speed control, rotates according to the rotation speed command value N0. At this point, since the rotation speed of the AC excitation motor 2 is higher than the rotation speed command value N0, the active power of the AC excitation generator motor of the present embodiment is in the power generation direction (active power release direction). Under the control, the rotation speed of the AC-excited generator motor 2 is gradually reduced to the rotation speed command value N0, and the operation returns to the standby operation state.
【００２７】図３は本発明の第２の実施の形態の交流励
磁型発電電動装置の構成を示すブロック図である。図に
おいて、図１の第一の実施の形態の交流励磁型発電電送
装置と同一の構成要素には同一の番号を付し、その説明
を省略する。FIG. 3 is a block diagram showing a configuration of an AC-excited generator motor according to a second embodiment of the present invention. In the figure, the same components as those of the AC excitation type power transmission device of the first embodiment of FIG. 1 are denoted by the same reference numerals, and the description thereof will be omitted.
【００２８】本実施の形態においては、利得の異なる２
個ずつの速度制御器と電力制御器が設けられ、速度制御
器と電力制御器のそれぞれ１個は常に電流制御器９に接
続されているように構成したものである。すなわち、速
度制御器として利得の異なる２個の速度制御器６−１，
６−２が並列に設けられ、速度制御器６−１には切替器
１１−１が、速度制御器６−２には切替器１１−２がそ
れぞれ接続されている。また、電力制御器として利得の
異なる２個の電力制御器８−１，８−２が並列に設けら
れ、電力制御器８−１には切替器１２−１が、電力制御
器８−２には切替器１２−２がそれぞれ接続されてい
る。切替器１１−１，１１−２，１２−１，１２−２の
他方の端子は電流制御器９の第１の入力端子に接続され
ている。In the present embodiment, two different gains are used.
A speed controller and a power controller are provided for each unit, and one of the speed controller and one of the power controllers is always connected to the current controller 9. That is, as speed controllers, two speed controllers 6-1 and 2-1 having different gains are used.
6-2 are provided in parallel, a switch 11-1 is connected to the speed controller 6-1 and a switch 11-2 is connected to the speed controller 6-2. Further, two power controllers 8-1 and 8-2 having different gains are provided in parallel as power controllers, and a switch 12-1 is provided in the power controller 8-1, and a power controller 8-2 is provided in the power controller 8-2. Is connected to the switch 12-2. The other terminals of the switches 11-1, 11-2, 12-1, 12-2 are connected to a first input terminal of the current controller 9.
【００２９】速度制御器６−１の利得は速度制御器６−
２の利得より大きく、電力制御器８−１の利得は電力制
御器８−２の利得より大きい。また、交流励磁型発電電
動機２の待機運転時には切替器１１−１及び１２−２が
閉路され、切替器１１−２及び１２−１が開路されてい
る。すなわち、待機運転時には、速度制御器６−１から
のｑ軸成分電流Ｉｑの指令値が電力制御器８−２のｑ軸
成分電流Ｉｑの指令値よりも大きな割合で、かつ速度制
御器６−１及び電力制御器８−２の双方からｑ軸成分電
流Ｉｑの指令値が電流制御器９に入力される。したがっ
て、定常運転時には、交流励磁型発電電動機２は速度制
御の割合の方が有効電力制御の割合より大きくなり、回
転速度指令値Ｎ０に従った有効電力を交流電力系統１に
放出、吸収する。The gain of the speed controller 6-1 is determined by the speed controller 6-
2, the gain of the power controller 8-1 is larger than the gain of the power controller 8-2. During standby operation of the AC excitation type generator motor 2, the switches 11-1 and 12-2 are closed, and the switches 11-2 and 12-1 are open. That is, during the standby operation, the command value of the q-axis component current Iq from the speed controller 6-1 is larger than the command value of the q-axis component current Iq of the power controller 8-2, and the speed controller 6- The command value of the q-axis component current Iq is input to the current controller 9 from both the power controller 1 and the power controller 8-2. Therefore, during the steady operation, the rate of the speed control of the AC-excited generator motor 2 is greater than the rate of the active power control, and the active power according to the rotation speed command value N0 is released and absorbed into the AC power system 1.
【００３０】交流電力系統の異常時に事故相の遮断器が
切れると、系統異常検出器１０から選択信号が出力さ
れ、この選択信号により切替器１１−１と１２−２が開
路され、切替器１１−２と１２−１が閉路される。した
がって、選択信号出力中は、電力制御器８−１からのｑ
軸成分電流Ｉｑの指令値が速度制御器６−２からのｑ軸
成分電流Ｉｑの指令値よりも大きな割合で、かつ電力制
御器８−１及び速度制御器６−２の双方からｑ軸成分電
流Ｉｑの指令値が電流制御器９に入力される。すなわ
ち、この期間中は交流励磁型発電電動機２は有効電力制
御の割合の方が速度制御の割合より大きくなり、有効電
力指令値Ｐ０に従った有効電力を交流電力系統１に放
出、吸収する。When the breaker of the fault phase is cut off when the AC power system is abnormal, a selection signal is output from the system abnormality detector 10, and the switching signals 11-1 and 12-2 are opened by this selection signal, and the switching device 11 -2 and 12-1 are closed. Therefore, while the selection signal is being output, q
The command value of the axis component current Iq is greater than the command value of the q-axis component current Iq from the speed controller 6-2, and the q-axis component from both the power controller 8-1 and the speed controller 6-2. The command value of the current Iq is input to the current controller 9. That is, during this period, the ratio of the active power control of the AC excitation generator motor 2 is higher than the ratio of the speed control, and the active power according to the active power command value P0 is released and absorbed into the AC power system 1.
【００３１】選択信号がオフとなると、再度、切替器１
１−１及び１２−２が閉路され、切替器１１−２及び１
２−１が開路される。これにより、交流励磁型発電電動
機２は速度制御の割合の方が有効電力制御の割合より大
きくなり、回転速度指令値Ｎ０に従った有効電力を交流
電力系統１に放出、吸収する。交流電力系統の異常時に
図２に示すように交流励磁型発電電動機２が有効電力を
吸収するような場合には、交流励磁型発電電動機２の回
転速度が定常運転時より上昇しているため、定常運転へ
の復帰により、交流励磁型発電電動機２の有効電力は発
電方向（有効電力放出方向）に制御され、除々に回転速
度指令値Ｎ０まで減速され、待機運転に戻る。When the selection signal is turned off, the switch 1
1-1 and 12-2 are closed, and the switches 11-2 and 1
2-1 is opened. As a result, the rate of the speed control of the AC excitation generator motor 2 becomes higher than the rate of the active power control, and the active power according to the rotation speed command value N0 is released and absorbed into the AC power system 1. When the AC-excited generator motor 2 absorbs active power as shown in FIG. 2 when the AC power system is abnormal, the rotational speed of the AC-excited generator motor 2 is higher than that in the normal operation. By returning to the steady operation, the active power of the AC-excited generator motor 2 is controlled in the power generation direction (active power release direction), gradually reduced to the rotation speed command value N0, and returns to the standby operation.
【００３２】[0032]
【発明の効果】本発明による交流励磁型発電電動装置に
おいては、交流電力系統の異常時に他の発電機の電力動
揺を抑えるように有効電力を制御し、有効電力の急激な
放出、吸収を行えるので、極めて大きな交流電力系統の
安定度の向上効果が得られる。さらに、待機運転時にお
いては、交流励磁型発電電動機を速度制御することによ
り、安定に、かつ要求される回転速度で運転することが
可能となる。In the AC-excited generator motor according to the present invention, the active power is controlled so as to suppress power fluctuations of other generators when the AC power system is abnormal, so that the active power can be rapidly released and absorbed. Therefore, an extremely large effect of improving the stability of the AC power system can be obtained. Furthermore, during standby operation, by controlling the speed of the AC excitation generator motor, it is possible to operate stably and at the required rotational speed.
【図１】本発明による交流励磁型発電電動装置の第１の
実施の形態の構成を示すブロック図である。FIG. 1 is a block diagram showing a configuration of a first embodiment of an AC excitation type generator motor according to the present invention.
【図２】図１の実施の形態の要部の交流電力系統の異常
時の動作を示すタイミングチャートである。FIG. 2 is a timing chart showing an operation of the main part of the embodiment of FIG. 1 when an AC power system is abnormal.
【図３】本発明による交流励磁型発電電動装置の第２の
実施の形態の構成を示すブロック図である。FIG. 3 is a block diagram showing a configuration of a second embodiment of the AC excitation type generator motor according to the present invention.
１ 交流電力系統 ２ 交流励磁発電電動機 ３ 電力変換装置 ４ 変圧器 ５ 速度検出器 ６，６−１，６−２ 速度制御器 ７ 電力検出器 ８，８−１，８−２ 電力制御器 ９ 電流制御器 １０ 系統異常検出器 １１，１１−１，１１−２，１２，１２−１，１２−２
切替器 １３ 電圧制御器 １４ 系統電圧位相演算器 １５ 回転子位相検出器 １６ 位相検出器 Ｐ０ 有効電力指令値 Ｎ０ 回転速度指令値REFERENCE SIGNS LIST 1 AC power system 2 AC excitation generator motor 3 Power converter 4 Transformer 5 Speed detector 6, 6-1, 6-2 Speed controller 7 Power detector 8, 8-1, 8-2 Power controller 9 Current Controller 10 System abnormality detector 11, 11-1, 11-2, 12, 12-1, 12-2
Switch 13 Voltage controller 14 System voltage phase calculator 15 Rotor phase detector 16 Phase detector P0 Active power command value N0 Rotation speed command value
───────────────────────────────────────────────────── フロントページの続き (72)発明者 樋口 幹祐 茨城県日立市幸町三丁目１番１号 株式会 社日立製作所日立工場内 (72)発明者 二見 基生 茨城県日立市大みか町七丁目２番１号 株 式会社日立製作所電力・電機開発本部内 (72)発明者 一瀬 雅哉 茨城県日立市大みか町七丁目２番１号 株 式会社日立製作所電力・電機開発本部内 (72)発明者 蓑口 潔 大阪府大阪市北区中之島３丁目３番22号 関西電力株式会社内 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Miyuki Miguchi 3-1-1, Sakaimachi, Hitachi-shi, Ibaraki Pref. Hitachi, Ltd. Hitachi Plant (72) Inventor Motoo Futami Omikamachi, Hitachi-shi, Ibaraki (2-1) Inventor Masaya Ichinose 7-2-1, Omika-cho, Hitachi City, Ibaraki Pref. Hitachi, Ltd. Power and Electricity Development Headquarters (72) Invention Kiyoshi Minoguchi 3-3-22 Nakanoshima, Kita-ku, Osaka City, Osaka Prefecture Kansai Electric Power Company
Claims (2)
を有し、該一次巻線が前記交流電力系統に接続された交
流励磁型発電電動機と、前記交流電力系統から変圧器を
介して給電され、その出力側が前記交流励磁型発電電動
機の二次巻線に接続され可変周波数の交流電流を該交流
励磁型発電電動機に給電する電力変換装置と、該電力変
換装置に接続され該電力変換装置に電流指令信号を出力
する電流制御器と、前記交流励磁型発電電動機の回転速
度を検出する速度検出器と、前記交流電力系統と前記交
流励磁型発電電動機との間でやり取りされる有効電力を
検出する電力検出器とを備えた交流励磁型発電電動装置
において、 前記電力検出器の検出した有効電力と有効電力指令値と
の偏差を低減するように前記電力変換装置を制御する第
１の制御手段と、 前記速度検出器の検出した速度と速度指令値との偏差を
低減するように前記電力変換装置を制御する第２の制御
手段と、 前記交流電力系統における異常を示す系統異常信号を検
知するとともに、検知した系統異常信号の有無に応じて
前記第１の制御手段と前記第２の制御手段とを選択する
ための選択信号を出力する系統異常検出手段と、 該系統異常検出手段の出力する選択信号に応じて前記第
１の制御手段と前記第２の制御手段とを切り替えて前記
電力変換装置に接続する切替手段とを備えたことを特徴
とする交流励磁型発電電動装置。1. An AC-excited generator motor having an AC power system, a primary winding and a secondary winding, the primary winding being connected to the AC power system, and a transformer from the AC power system. And a power converter connected to the secondary winding of the AC-excited generator motor to supply a variable-frequency AC current to the AC-excited generator motor; and a power converter connected to the power converter. A current controller that outputs a current command signal to a power converter, a speed detector that detects a rotation speed of the AC excitation type generator motor, and exchanges between the AC power system and the AC excitation type generator motor. An AC-excited generator-motor provided with a power detector that detects active power, wherein the power converter is controlled to reduce a deviation between the active power detected by the power detector and the active power command value. 1 system Means, second control means for controlling the power conversion device so as to reduce the deviation between the speed detected by the speed detector and a speed command value, and detecting a system abnormality signal indicating an abnormality in the AC power system. A system abnormality detecting means for outputting a selection signal for selecting the first control means and the second control means in accordance with the presence or absence of the detected system abnormality signal; and an output of the system abnormality detecting means And a switching means for switching between the first control means and the second control means in accordance with the selection signal to be connected to the power converter.
において、 前記第１の制御手段と前記第２の制御手段を、それぞ
れ、互いに利得の異なる複数の制御手段により構成し、 前記切替手段は、前記第１の制御手段と前記第２の制御
手段の複数の制御手段中から互いに利得が異なる制御手
段を該第１の制御手段及び該第２の制御手段として選択
して該複数の制御手段を切り替えて前記電力変換装置に
接続することを特徴とする交流励磁型発電電動装置。2. The AC-excited generator-motor according to claim 1, wherein the first control means and the second control means are respectively constituted by a plurality of control means having different gains, and the switching means is provided. Selecting the control means having different gains from the plurality of control means of the first control means and the second control means as the first control means and the second control means, and selecting the plurality of control means. An AC-excited generator-motor, wherein the means is switched to connect to the power converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP00400597A JP3911598B2 (en) | 1997-01-13 | 1997-01-13 | AC excitation type generator motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP00400597A JP3911598B2 (en) | 1997-01-13 | 1997-01-13 | AC excitation type generator motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10201296A true JPH10201296A (en) | 1998-07-31 |
| JP3911598B2 JP3911598B2 (en) | 2007-05-09 |
Family
ID=11572879
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP00400597A Expired - Fee Related JP3911598B2 (en) | 1997-01-13 | 1997-01-13 | AC excitation type generator motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3911598B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2005002039A1 (en) * | 2003-06-26 | 2006-08-10 | 東芝三菱電機産業システム株式会社 | Electric motor drive system |
| JP2006271199A (en) * | 2006-06-19 | 2006-10-05 | Hitachi Ltd | Wind-power generator |
| CN103441517A (en) * | 2013-08-08 | 2013-12-11 | 河海大学 | Smoothing method for power fluctuation of offshore renewable energy source integrated power generation system |
-
1997
- 1997-01-13 JP JP00400597A patent/JP3911598B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2005002039A1 (en) * | 2003-06-26 | 2006-08-10 | 東芝三菱電機産業システム株式会社 | Electric motor drive system |
| JP4489018B2 (en) * | 2003-06-26 | 2010-06-23 | 東芝三菱電機産業システム株式会社 | AC motor drive system |
| JP2006271199A (en) * | 2006-06-19 | 2006-10-05 | Hitachi Ltd | Wind-power generator |
| CN103441517A (en) * | 2013-08-08 | 2013-12-11 | 河海大学 | Smoothing method for power fluctuation of offshore renewable energy source integrated power generation system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3911598B2 (en) | 2007-05-09 |
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