JP4183406B2 - Wind power generation control device and control method thereof - Google Patents

Wind power generation control device and control method thereof Download PDF

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JP4183406B2
JP4183406B2 JP2001270354A JP2001270354A JP4183406B2 JP 4183406 B2 JP4183406 B2 JP 4183406B2 JP 2001270354 A JP2001270354 A JP 2001270354A JP 2001270354 A JP2001270354 A JP 2001270354A JP 4183406 B2 JP4183406 B2 JP 4183406B2
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wind turbine
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power
condition prediction
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JP2003083229A (en
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真司 有永
正人 後藤
英彦 伊高
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Mitsubishi Heavy Industries Ltd
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    • 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
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    • Y02E10/72—Wind turbines with rotation axis in wind direction

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Description

【０００１】
【発明の属する技術分野】
この発明は、風力エネルギを受けて発電する風力発電装置に関し、特に発電出力の制御装置およびその制御方法に関する。
【０００２】
【従来の技術】
風力発電装置は、風速の変動により発電電力が変動する。発電電力の変動には２種類の変動要素があり、その第１は風車の受風領域内の風速分布変化によりロータ回転数の３倍の周波数（ロータが３ブレードの場合）で変動するものであり、その第２は気象の変化による長周期の風速変動による発電電力変動である。前者の変動は系統連系を行う電力系統側の電圧変動をもたらし、後者は電力系統側の周波数変動をもたらすため、風力発電装置導入の阻害要因になっており、これら電力の変動を抑える必要がある。
【０００３】
図３は、従来の技術による風力発電装置の構成を示すブロック図である。この図の風車ロータ１０は、風車ブレード１１をピッチ制御することによって等速回転を行い、増速機１２によって所定回転速度に増速して発電機１３を駆動し、交流発電出力を電力系統と接続して連系運転を行う。この構成の風力発電装置の系統送出電力の変動を抑える制御方法として、高風速で発電機１３による発電電力が過大であるときはコンバータ１４によって直流に変換して蓄電池１６にエネルギを蓄積し、発電量が不足したときこの蓄電池１６の蓄積エネルギをインバータ１５によって交流電力に逆変換して系統に送出し、発電機１３の発電電力の不足分を補う方法が実用化されている。
【０００４】
図４は、図３の風力発電装置１００の風車出力すなわち発電機１３の出力と蓄電池１６の充放電を説明する図である。この図において、風車出力すなわち発電機出力は絶えず変動しており、出力が平均値を超えたとき過剰な出力をコンバータ１４によって直流に変換して蓄電池１６を充電し、出力が出力平均値を下回ったとき不足分を蓄電池１６から放電してインバータ１５を駆動して交流出力を系統に接続することによって発電機出力の不足分を補い、常に発電機出力平均値を系統に送出する。
【０００５】
【発明が解決しようとする課題】
ところが上述の方法では、変動する風速に対して計画的な運用ができず、過剰な電力を蓄える二次電池として大容量の蓄電池と電力変換器を必要とし、装置が大型になりコストが上昇する、さらに蓄電池は交換が必要でありランニングコストが高くなるという課題があった。
【０００６】
本発明はこのような背景の下になされたもので、取得した風況予測情報に基づいて出力目標値をスケジューリングし、この目標値にしたがって風車のブレードピッチおよび電力変換器を制御して風車を可変速とし、計画的な発電電力を得ることができる風力発電制御装置およびその制御方法を提供することを目的とする。
【０００７】
【課題を解決するための手段】
請求項１に記載の発明は、風力発電装置の発電出力変動を抑制する風力発電制御装置であって、気象協会やＣＲＣ総研等が発信する気象情報から風況予測状況のデータを抽出した風況予測情報を取得する風況予測情報取得手段と、取得した前記風況予測情報から風車出力予想値を算出して電力系統に送出される電力の変動の機会を減少するように風車出力目標値のスケジューリングを行う風車出力スケジューリング手段と、該スケジューリング手段による風車出力目標値に基づいて風車のブレードピッチおよび電力変換器を制御するブレードピッチおよび電力変換器制御手段とを具備し、前記風車出力目標値のスケジューリングは、前記風車出力予想値を超えない範囲で、かつ、所定時間以上一定出力値を保持するように、時間軸に対して段階的に変化することを特徴とする風力発電制御装置を提供する。
【０００８】
この発明によれば、外部の気象予測情報から得た風況予測情報によって、電力系統に送出される電力の変動の機会を減少するように風車出力目標パターンをスケジューリングして可変速風車のブレードピッチおよび電力変換器を制御し、目標パターン通りの出力を発生するように制御することができる。これにより電力系統全体の給電計画が立てやすくなり、風力発電装置の導入が促進される。サイトの風況予測情報は、気象協会やＣＲＣ総研等が配信する気象情報から風況予測状況のデータを抽出したものである。特に、風車出力の目標値のスケジューリングは、風車のストールを防止するために風況予測情報に基づいて算出した風車出力予想値を超えない範囲で、かつ、所定時間以上の一定の出力値を保持できるように、時間軸に対して段階的に変化するスケジューリングがなされるので、電力系統に送出される電力の変動の機会が減少するとともに、風車出力を有効に利用することができる。
【００１１】
請求項２に記載の発明は、請求項１記載の風力発電制御装置において、前記風況予測情報は、専用回線を介して取得することを特徴とする。
【００１２】
この発明によれば、風況予測情報をあらかじめ契約した気象協会、ＣＲＣ総研等との間に専用回線を設けて取得することによって確実に必要な情報を取得することができる。
【００１３】
請求項３に記載の発明は、請求項１記載の風力発電制御装置において、前記風況予測情報は、インターネットを介して取得することを特徴とする。
【００１４】
この発明によれば、風況予測情報をインターネットを介して気象協会またはＣＲＣ総研等から得ることによって情報取得のためのコストを低減することができる。
【００１５】
請求項４に記載の発明は、風力発電装置の発電出力変動を抑制する風力発電制御方法であって、気象協会やＣＲＣ総研等が発信する気象情報から風況予測状況のデータを抽出した風況予測情報を専用回線またはインターネットを介して取得する過程と、取得した前記風況予測情報から風車出力予想値を算出する過程と、電力系統に送出される電力の変動の機会を減少させ、算出した前記風車出力予想値を超えない範囲で、かつ、所定時間以上一定出力値を保持するように、時間軸に対して段階的に変化する風車出力目標値をスケジューリングする過程と、スケジューリングされた前記風車出力目標値に基づいて風車のブレードピッチおよび電力変換器を制御する過程と、を有することを特徴とする風力発電制御方法を提供する。
【００１６】
この発明によれば、風況予測情報を取得して風車出力予想値を算出し、電力系統に送出される電力の変動の機会を減少させ、算出した風車出力予想値を超えない範囲で所定時間以上一定の出力値を保持するように、時間軸に対して段階的に変化する風車の出力目標をスケジューリングし、風車の出力をこの出力目標に近づけるようにブレードピッチおよび電力変換器を制御して変速を行うので、可変速風車として風車出力を有効に電力として取り出すことができ、電力系統全体の給電計画が立てやすくなり、風力発電装置の導入が促進される。サイトの風況予測情報は、気象協会やＣＲＣ総研等が配信する気象情報から風況予測状況のデータを抽出したものである。
【００１７】
【発明の実施の形態】
以下、この発明の一実施の形態について図を参照しながら説明する。図１はこの発明の一実施の形態による風力発電装置の構成を示すブロック図である。
この図において、符号１の風力発電装置は、風車ロータ１０に取り付けられた複数枚の風車ブレード１１が風力エネルギを受けて風車ロータ１０とともに回転し、増速機１２によって増速した後、発電機１３を駆動して発電することにより風力エネルギを電気エネルギに変換する。なお、増速機を用いないダイレクトドライブ方式でも有効である。
通常、この電気エネルギは交流出力であるが、直接電力系統と連系運転をすることはできず、コンバータ１４によって直流電力に変換した後、インバータ１５によって連系可能な電圧、周波数の交流電力に逆変換して電力系統と連系運転を行う。
【００１８】
この風力発電装置１は、風況予測情報によって出力可能な風車の出力をスケジューリングして風車ブレードのピッチおよび電力変換器を制御し、所定の出力を取り出す機能を持っている。風況予測情報２は、気象協会やＣＲＣ総研等が発信する気象情報のうちの風況予測情報であり、専用回線またはインターネットによる回線３を通して風況予測情報取得手段１７にもたらされる。
取得した風況予測情報に基づいて風車出力スケジュール手段１８において、出力目標値のスケジューリングを行い、ブレードピッチおよび電力変換器制御手段１９によって風車ブレード１１のピッチ制御および電力変換器制御を行うことによって目標値の出力を得る。
【００１９】
図２は、風速予測値ａ、風車出力予想値ｂ、および出力目標値ｃの間の関係を示した図である。この図において風速予測値ａは、専用回線またはインターネットによる回線３を通して風況予測情報２から得た情報から抽出したデータであり、３日後までの風速が予測されている。風況予測情報は気象協会、またはＣＲＣ総研等から１日に数回発信され、その都度、風速予測値ａのデータが更新される。
風車出力予想値ｂは、風速予測値ａから導き出される値で、図では風速と比例関係にあるように見えるが、風力エネルギは風速の３乗に比例するので、実際は風速の３乗に比例する値である。
出力目標値ｃは、風車出力スケジューリング手段１８において風車出力予想値ｂを超えない範囲になるように、且つ所定時間以上一定値を保つようにスケジューリングされ、したがって図に示すように時間軸に対して段階的に変化する値となる。
【００２０】
スケジューリングされた出力目標値ｃは、ブレードピッチおよび電力変換器制御手段１９に渡され、受けた風力エネルギによって発電機１３が所定の発電出力を発生できるように風車ブレード１１のピッチおよび電力変換器を制御する。
発電機１３の発電出力はコンバータ１４において直流電力に変換した後、インバータ１５によって系統と連系運転可能な周波数、電圧の交流に逆変換され、電力系統と連系運転を行う。
このような制御を行うことによって電力系統全体の給電計画が立てやすくなる。
【００２１】
図１には示していないが、コンバータ１４の出力側に蓄電池を配設し、予想外の風速変動による余剰エネルギを蓄えるようにすると、システムの信頼性の向上に寄与することができる。この場合の蓄電池は、常時充放電を繰り返すものではなく、風況予測の誤差による過不足分を補うものなので、小容量の蓄電池で事足り、蓄電池寿命も長くなる。
また、余剰エネルギの他の蓄積方法として、風車および発電機の回転系に大きなＧＤ2を持たせ、このＧＤ2によるフライホイールに蓄えるようにしてもよい。この方法によれば、風速の短周期のリップル変動による回転ムラを吸収することができる。
【００２２】
以上、本発明の一実施の形態の動作を図面を参照して詳述してきたが、本発明はこの実施の形態に限られるものではなく、本発明の要旨を逸脱しない範囲の設計変更等があっても本発明に含まれる。
たとえば、風況予測情報は外部機関から回線を通して入手する方法に限られるものではなく、風力発電装置内に自前の風況予測機能を持たせたものであってもよい。
また、風車の回転を増速して発電機に接続する増速機に代えて発電機の極数を多くし、所定周波数の交流出力を得るようにしてもよい。
【００２３】
【発明の効果】
これまでに説明したように、本発明によれば以下に示す効果が得られる。
請求項１の発明によれば、気象協会やＣＲＣ総研等が配信する気象予測情報から得た風況予測情報によって、電力系統に送出される電力の変動の機会を減少させるように風車出力目標パターンをスケジューリングして可変速風車のブレードピッチを制御し、目標パターン通りの出力を発生するように制御することができる。これにより電力系統全体の給電計画が立てやすくなり、風力発電装置の導入が促進される。
そして、風車出力の目標値のスケジューリングは、風車のストールを防止するために風況予測情報に基づいて算出した風車出力予想値を超えない範囲で、かつ、所定時間以上の間一定の出力値を保持できるように、時間軸に対して段階的に変化するようになされるので、電力系統に送出される電力の変動の機会が減少するとともに、風車出力を有効に利用することができる。
【００２５】
請求項２の発明によれば、風況予測情報をあらかじめ契約した気象協会、ＣＲＣ総研等との間に専用回線を設けて取得することによって確実に必要な情報を取得することができる。
【００２６】
請求項３の発明によれば、風況予測情報をインターネットを介して気象協会またはＣＲＣ総研等から得ることによって情報取得のためのコストを低減することができる。
【００２７】
請求項４の発明によれば、気象協会やＣＲＣ総研等から配信される気象予測情報をサイトの風況予測情報とし、この風況予測情報から風車出力予想値を算出する。そして、電力系統に送出される電力の変動の機会を減少させ、算出した風車出力予想値を超えない範囲で所定時間以上一定の出力値を保持するように、時間軸に対して段階的に変化する風車の出力目標をスケジューリングし、風車の出力をこの出力目標に近づけるようにブレードピッチおよび電力変換器を制御して変速を行うので、可変速風車として風車出力を有効に電力として取り出すことができ、電力系統全体の給電計画が立てやすくなり、風力発電装置の導入が促進される。すなわち、可変速風車として風車出力を有効に電力として取り出すことができるので、電力系統全体の給電計画が立てやすくなり、風力発電装置の導入が促進される。
【図面の簡単な説明】
【図１】 本発明の一実施の形態による風力発電装置の構成を示すブロック図。
【図２】 風況予測情報から得た風速予測値と、図１の風力発電装置の風車出力予想値および出力目標値の関係を示した図。
【図３】 従来の技術による風力発電装置の構成を示すブロック図。
【図４】 図３の風力発電装置の発電機出力と蓄電池の充放電を説明する図。
【符号の説明】
１、１００…風力発電装置
２…風況予測情報
３…回線
１０…風車ロータ
１１…風車ブレード
１２…増速機
１３…発電機
１４…コンバータ
１５…インバータ
１６…蓄電池
１７…風況予測情報取得手段
１８…風車出力スケジュール手段
１９…ブレードピッチ制御手段[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a wind turbine generator that generates power by receiving wind energy, and more particularly, to a controller and a control method for a power generation output.
[0002]
[Prior art]
In the wind turbine generator, generated power fluctuates due to fluctuations in wind speed. There are two types of fluctuation factors in the fluctuations in the generated power, the first of which fluctuates at a frequency that is three times the rotor speed (when the rotor has three blades) due to changes in the wind speed distribution in the wind receiving area of the wind turbine. The second is a fluctuation in generated power due to a long-period fluctuation in wind speed due to a change in weather. The former fluctuations cause voltage fluctuations on the power system side that performs grid connection, and the latter causes frequency fluctuations on the power system side, which is an impediment to the introduction of wind power generators, and it is necessary to suppress these power fluctuations. is there.
[0003]
FIG. 3 is a block diagram showing a configuration of a conventional wind power generator. The wind turbine rotor 10 shown in this figure rotates at a constant speed by controlling the pitch of the wind turbine blades 11, and is increased to a predetermined rotational speed by the speed increaser 12 to drive the generator 13. Connect and perform interconnected operation. As a control method for suppressing fluctuations in the system transmission power of the wind power generator having this configuration, when the power generated by the generator 13 is excessive at high wind speed, the converter 14 converts it into direct current and accumulates energy in the storage battery 16 to generate power. When the amount is insufficient, the energy stored in the storage battery 16 is reversely converted into AC power by the inverter 15 and sent to the system to make up for the shortage of power generated by the generator 13.
[0004]
FIG. 4 is a diagram for explaining the windmill output of the wind turbine generator 100 of FIG. 3, that is, the output of the generator 13 and the charging / discharging of the storage battery 16. In this figure, the windmill output, that is, the generator output constantly fluctuates, and when the output exceeds the average value, the excessive output is converted into direct current by the converter 14 to charge the storage battery 16, and the output falls below the average output value. Then, the shortage is discharged from the storage battery 16 and the inverter 15 is driven to connect the AC output to the system to compensate for the deficiency of the generator output, and the generator output average value is always sent to the system.
[0005]
[Problems to be solved by the invention]
However, the above-described method cannot be systematically operated with respect to fluctuating wind speeds, requires a large-capacity storage battery and a power converter as a secondary battery for storing excessive power, and the device becomes large and costs increase. Furthermore, there is a problem that the storage battery needs to be replaced and the running cost becomes high.
[0006]
The present invention has been made under such a background. The output target value is scheduled based on the obtained wind condition prediction information, and the wind turbine is controlled by controlling the blade pitch and the power converter of the wind turbine according to the target value. It is an object of the present invention to provide a wind power generation control device and a control method thereof capable of obtaining variable generation speed and planned generation power.
[0007]
[Means for Solving the Problems]
The invention described in claim 1 is a wind power generation control device that suppresses fluctuations in the power generation output of the wind power generation device, and extracts wind condition prediction data from weather information transmitted by the Japan Meteorological Association or CRC Research Institute. Wind condition prediction information acquisition means for acquiring prediction information, and a wind turbine output target value of the wind turbine output target value so as to reduce the chance of fluctuation of the electric power sent to the power system by calculating a wind turbine output predicted value from the acquired wind condition prediction information. and a windmill output scheduling means for performing scheduling, comprising a blade pitch and power converter control means for controlling the blade pitch and power converter of the wind turbine based on the wind turbine output target value by said scheduling means, the wind turbine output target value Scheduling is performed with respect to the time axis so as to maintain a constant output value within a range not exceeding the wind turbine output expected value and for a predetermined time or more. To provide a wind power generation control apparatus characterized by varying manner.
[0008]
According to the present invention, a wind turbine output target pattern is scheduled by a wind condition prediction information obtained from external weather prediction information so as to reduce the chance of fluctuation of the power sent to the power system, and the blade pitch of the variable speed wind turbine is determined. And the power converter can be controlled to generate an output according to the target pattern. This makes it easier to make a power supply plan for the entire power system and promotes the introduction of wind power generators. The wind condition prediction information on the site is obtained by extracting wind condition prediction data from weather information distributed by the Japan Meteorological Association or CRC Research Institute. In particular, scheduling of the target value of the wind turbine output keeps a constant output value within a predetermined time or more in a range that does not exceed the predicted wind turbine output value calculated based on the wind condition prediction information to prevent the wind turbine from stalling. As can be done, scheduling that changes stepwise with respect to the time axis is performed, so that the chance of fluctuations in the power sent to the power system is reduced and the wind turbine output can be used effectively.
[0011]
According to a second aspect of the invention, the wind power generation control apparatus according to claim 1, wherein the wind status prediction information, and obtains via the dedicated line.
[0012]
According to the present invention, necessary information can be reliably acquired by providing a dedicated line between the weather association, CRC Research Institute, etc., which has previously contracted wind condition prediction information.
[0013]
According to a third aspect of the invention, the wind power generation control apparatus according to claim 1, wherein the wind status prediction information, and obtains via the Internet.
[0014]
According to this invention, the cost for information acquisition can be reduced by obtaining wind condition prediction information from the Meteorological Association, CRC Research Institute, etc. via the Internet.
[0015]
The invention according to claim 4 is a wind power generation control method for suppressing fluctuations in the power generation output of the wind power generation apparatus, wherein wind condition prediction data is extracted from weather information transmitted by the Meteorological Association, CRC Research Institute, etc. The process of obtaining forecast information via a dedicated line or the Internet, the process of calculating the wind turbine output predicted value from the obtained wind condition forecast information, and reducing the chance of fluctuations in the power sent to the power system A process of scheduling a wind turbine output target value that changes stepwise with respect to a time axis so as to maintain a constant output value within a range not exceeding the wind turbine output expected value and for a predetermined time or more, and the scheduled wind turbine And a method of controlling a blade pitch of a wind turbine and a power converter based on an output target value.
[0016]
According to the present invention, the wind condition prediction information is acquired to calculate the predicted wind turbine output value, the chance of fluctuation of the power sent to the power system is reduced , and the predetermined time is within a range not exceeding the calculated predicted wind turbine output value. To maintain a constant output value, schedule the wind turbine output target that changes stepwise with respect to the time axis, and control the blade pitch and power converter to bring the wind turbine output closer to this output target. Since shifting is performed, the wind turbine output can be effectively extracted as electric power as a variable speed wind turbine, and it becomes easy to make a power supply plan for the entire power system, and the introduction of the wind power generator is promoted. The wind condition prediction information on the site is obtained by extracting wind condition prediction data from weather information distributed by the Japan Meteorological Association or CRC Research Institute.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a wind turbine generator according to an embodiment of the present invention.
In this figure, the wind power generator denoted by reference numeral 1 is configured such that a plurality of wind turbine blades 11 attached to the wind turbine rotor 10 receive wind energy and rotate together with the wind turbine rotor 10 and are increased in speed by the speed increaser 12. Wind energy is converted into electric energy by driving 13 to generate power. A direct drive system that does not use a gearbox is also effective.
Normally, this electric energy is an AC output, but cannot be directly connected to the power system. After being converted into DC power by the converter 14, the AC power is converted to AC power having a voltage and frequency that can be connected by the inverter 15. Reverse conversion is performed to connect to the power system.
[0018]
The wind turbine generator 1 has a function of scheduling a wind turbine output that can be output based on wind condition prediction information, controlling a pitch of the wind turbine blade and a power converter, and extracting a predetermined output. The wind condition prediction information 2 is the wind condition prediction information of the weather information transmitted by the weather association, CRC Research Institute, etc., and is brought to the wind condition prediction information acquisition means 17 through the dedicated line or the line 3 by the Internet.
Based on the obtained wind condition prediction information, the wind turbine output scheduling means 18 schedules the output target value, and the blade pitch and power converter control means 19 performs the pitch control and power converter control of the wind turbine blade 11 to achieve the target. Get the output of the value.
[0019]
FIG. 2 is a diagram showing the relationship among the predicted wind speed value a, the predicted wind turbine output value b, and the output target value c. In this figure, the predicted wind speed value a is data extracted from the information obtained from the wind condition prediction information 2 through the dedicated line or the line 3 by the Internet, and the wind speed up to three days later is predicted. The wind condition prediction information is transmitted several times a day from the weather association, CRC Research Institute, etc., and the data of the wind speed prediction value a is updated each time.
The wind turbine output predicted value b is a value derived from the wind speed predicted value a, and in the figure, it seems to be proportional to the wind speed, but since the wind energy is proportional to the third power of the wind speed, it is actually proportional to the third power of the wind speed. Value.
The output target value c is scheduled in the wind turbine output scheduling means 18 so as to be within a range not exceeding the wind turbine output expected value b and to keep a constant value for a predetermined time or more. The value changes step by step.
[0020]
The scheduled output target value c is passed to the blade pitch and power converter control means 19, and the pitch and power converter of the windmill blade 11 are set so that the generator 13 can generate a predetermined power generation output by the received wind energy. Control.
The power generation output of the generator 13 is converted into DC power by the converter 14, and then reversely converted to AC of a frequency and voltage that can be interconnected with the system by the inverter 15, thereby performing interconnected operation with the power system.
By performing such control, it becomes easy to make a power supply plan for the entire power system.
[0021]
Although not shown in FIG. 1, if a storage battery is provided on the output side of the converter 14 so as to store surplus energy due to unexpected wind speed fluctuations, it is possible to contribute to improvement of system reliability. In this case, the storage battery does not constantly charge and discharge, but compensates for excess and deficiency due to errors in wind condition prediction, so a small capacity storage battery is sufficient, and the storage battery life is extended.
As another method for accumulating surplus energy, a large GD 2 may be provided in the rotating system of the windmill and the generator, and the GD 2 may be stored in the flywheel. According to this method, it is possible to absorb the rotation unevenness due to the ripple fluctuation in the short period of the wind speed.
[0022]
The operation of the embodiment of the present invention has been described in detail with reference to the drawings. However, the present invention is not limited to this embodiment, and design changes and the like within a scope not departing from the gist of the present invention are possible. Even if it exists, it is included in this invention.
For example, the wind condition prediction information is not limited to a method of obtaining it from an external organization through a line, but may be a wind power generation apparatus having its own wind condition prediction function.
Alternatively, the number of poles of the generator may be increased to obtain an AC output with a predetermined frequency instead of the speed increaser connected to the generator by increasing the rotation of the windmill.
[0023]
【The invention's effect】
As described above, according to the present invention, the following effects can be obtained.
According to the first aspect of the present invention, the wind turbine output target pattern is set so as to reduce the chance of fluctuation of the electric power sent to the electric power system by the wind condition prediction information obtained from the weather prediction information distributed by the weather association, CRC Research Institute, etc. To control the blade pitch of the variable speed wind turbine so that the output according to the target pattern is generated. This makes it easier to make a power supply plan for the entire power system and promotes the introduction of wind power generators.
The target value of the wind turbine output is scheduled within a range that does not exceed the predicted wind turbine output calculated based on the wind condition prediction information in order to prevent the wind turbine from stalling, and for a predetermined time or more. Since it is changed in a stepwise manner with respect to the time axis so that it can be maintained, the chance of fluctuation of the power sent to the power system is reduced, and the wind turbine output can be used effectively.
[0025]
According to the second aspect of the present invention, necessary information can be reliably acquired by providing a dedicated line between the weather association, CRC Research Institute, etc., which has previously contracted wind condition prediction information.
[0026]
According to the invention of claim 3 , the cost for obtaining information can be reduced by obtaining the wind condition prediction information from the Meteorological Association or CRC Research Institute etc. via the Internet.
[0027]
According to the invention of claim 4, the weather forecast information distributed from the weather association, CRC Research Institute, etc. is used as the wind condition forecast information of the site, and the wind turbine output forecast value is calculated from this wind condition forecast information. Then, the chances of fluctuation of the power sent to the power system are reduced, and the output changes stepwise with respect to the time axis so as to maintain a constant output value for a predetermined time or more within a range not exceeding the calculated wind turbine output expected value. The wind turbine output target is scheduled, and the blade pitch and the power converter are controlled so that the wind turbine output is close to the output target, so that the wind turbine output can be effectively extracted as electric power as a variable speed wind turbine. This makes it easier to make a power supply plan for the entire power system and promotes the introduction of wind power generators. That is, since the wind turbine output can be effectively taken out as electric power as a variable speed wind turbine, it is easy to make a power supply plan for the entire power system, and the introduction of the wind power generator is promoted.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of a wind turbine generator according to an embodiment of the present invention.
FIG. 2 is a diagram showing a relationship between a wind speed prediction value obtained from wind condition prediction information, a wind turbine output prediction value and an output target value of the wind turbine generator of FIG.
FIG. 3 is a block diagram showing a configuration of a conventional wind power generator.
4 is a diagram for explaining generator output of the wind turbine generator of FIG. 3 and charge / discharge of a storage battery.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1,100 ... Wind power generator 2 ... Wind condition prediction information 3 ... Line 10 ... Windmill rotor 11 ... Windmill blade 12 ... Speed increaser 13 ... Generator 14 ... Converter 15 ... Inverter 16 ... Storage battery 17 ... Wind condition prediction information acquisition means 18 ... Windmill output schedule means 19 ... Blade pitch control means

Claims (4)

風力発電装置の発電出力変動を抑制する風力発電制御装置であって、
気象協会やＣＲＣ総研等が発信する気象情報から風況予測状況のデータを抽出して風況予測情報を取得する風況予測情報取得手段と、
取得した前記風況予測情報から風車出力予想値を算出して電力系統に送出される電力の変動の機会を減少するように風車出力目標値のスケジューリングを行う風車出力スケジューリング手段と、
該スケジューリング手段による風車出力目標値に基づいて風車のブレードピッチを制御するブレードピッチ制御手段と、を具備し、
前記風車出力目標値のスケジューリングは、前記風車出力予想値を超えない範囲で、かつ、所定時間以上一定出力値を保持するように、時間軸に対して段階的に変化することを特徴とする風力発電制御装置。A wind power generation control device that suppresses power generation output fluctuation of the wind power generation device,
Wind condition prediction information acquisition means for extracting wind condition prediction information by extracting wind condition prediction data from weather information transmitted by the Japan Meteorological Association or CRC Research Institute ,
Wind turbine output scheduling means for scheduling the wind turbine output target value so as to reduce the chance of fluctuation of the power sent to the power system by calculating the wind turbine output predicted value from the obtained wind condition prediction information;
Blade pitch control means for controlling the blade pitch of the wind turbine based on the wind turbine output target value by the scheduling means,
The wind turbine output target value scheduling changes stepwise with respect to the time axis so as to maintain a constant output value within a range not exceeding the wind turbine output expected value and for a predetermined time or more. Power generation control device. 前記風況予測情報は、専用回線を介して取得することを特徴とする請求項１記載の風力発電制御装置。  The wind power generation control apparatus according to claim 1, wherein the wind condition prediction information is acquired via a dedicated line. 前記風況予測情報は、インターネットを介して取得することを特徴とする請求項１記載の風力発電制御装置。  The wind power generation control apparatus according to claim 1, wherein the wind condition prediction information is acquired via the Internet. 風力発電装置の発電出力変動を抑制する風力発電制御方法であって、
気象協会やＣＲＣ総研等が発信する気象情報から風況予測状況のデータを抽出した風況予測情報を専用回線またはインターネットを介して取得する過程と、
取得した前記風況予測情報から風車出力予想値を算出する過程と、
電力系統に送出される電力の変動の機会を減少させ、算出した前記風車出力予想値を超えない範囲で、かつ、所定時間以上一定出力値を保持するように、時間軸に対して段階的に変化する風車出力目標値をスケジューリングする過程と、
スケジューリングされた前記風車出力目標値に基づいて風車のブレードピッチおよび電力変換器を制御する過程と、を有することを特徴とする風力発電制御方法。A wind power generation control method for suppressing fluctuations in power generation output of a wind turbine generator,
A process of obtaining wind condition prediction information obtained by extracting data on wind condition prediction conditions from weather information transmitted by the Meteorological Association, CRC Research Institute, etc. via a dedicated line or the Internet;
A process of calculating a wind turbine output predicted value from the acquired wind condition prediction information;
Reduce the chances of fluctuations in the power sent to the power system , and keep the output value in a range that does not exceed the calculated wind turbine output expected value, and maintain a constant output value for a predetermined time or more step by step. Scheduling a changing wind turbine output target value;
And a step of controlling a wind turbine blade pitch and a power converter based on the scheduled wind turbine output target value.
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