JP3758359B2 - Wind power output stabilization method and apparatus - Google Patents

Wind power output stabilization method and apparatus Download PDF

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JP3758359B2
JP3758359B2 JP10279798A JP10279798A JP3758359B2 JP 3758359 B2 JP3758359 B2 JP 3758359B2 JP 10279798 A JP10279798 A JP 10279798A JP 10279798 A JP10279798 A JP 10279798A JP 3758359 B2 JP3758359 B2 JP 3758359B2
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成文 遠嶋
秀文 高田
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石川島播磨重工業株式会社
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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
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction
    • 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
    • Y02E10/70—Wind energy
    • Y02E10/76—Power conversion electric or electronic aspects
    • 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
    • Y02E70/00—Other energy conversion or management systems reducing GHG emissions
    • Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin

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Description

【０００１】
【発明の属する技術分野】
本発明は風力発電出力安定化方法及び装置に関するものである。
【０００２】
【従来の技術】
近年、自然界に存在するエネルギーを電力に変換する手段のひとつとして、風力発電が実施されている。
【０００３】
図６は風力発電を適用した発電設備の一例であり、この発電設備は、風力を受けるプロペラ１で交流発電機本体２を駆動する風力発電機３と、ディーゼル機関４で交流発電機本体５を駆動するディーゼル発電機６とを備え、両発電機３，６の発生電力を、同一の電力線７を介して需要対象へ給電するように構成されている。
【０００４】
【発明が解決しようとする課題】
図６に示す発電設備では、ディーゼル発電機６の発生電力は、ディーゼル機関４の出力で定まるが、風力発電機３の発生電力は、風力変化に応じて図３に示すように変動するので、出力電圧及び周波数が不安定になる。
【０００５】
このため、風力発電機３の出力に応じてディーゼル機関４の出力及び回転数を調整し、需要対象へ給電すべき電力の安定化を図るか、あるいは、風力発電機３の定格発生電力をディーゼル発電機６の定格発生電力の１０〜１５％程度以下として、需要対象へ給電されるべき電力が顕著な変動を呈しないようにする必要がある。
【０００６】
本発明は上述した実情に鑑みてなしたもので、風力発電機から電力線へ給電する電力の安定化を図り、電圧及び周波数の変動を抑止することを目的としている。
【０００７】
【課題を解決するための手段】
上記目的を達成するため、本発明の請求項１に記載の風力発電出力安定化方法では、風力発電機から電力線へ給電すべき発生電力の変動を微小単位時間ごとに計測して微小単位時間内における風力発電機の発生電力の平均値を求め、当該平均値と現時点での発生電力とを対比し、現時点での風力発電機の発生電力が微小単位時間内における平均値を上回った際に、当該発生電力の平均値に等しい分を電力線へ給電し且つ発生電力の平均値を上回った分を電力貯蔵手段に蓄え、現時点での風力発電機の発生電力が微小単位時間内における平均値を下回った際に、発生電力の全てを電力線へ給電し且つ発生電力の平均値を下回った分を電力貯蔵手段から電力線へ給電する。
【０００８】
本発明の請求項２に記載の風力発電出力安定化装置では、風力発電機から電力線へ給電すべき発生電力を検知する電力検知器と、風力発電機の発生電力を蓄電池へ給電し得るコンバータと、蓄電池に蓄えられた電力を電力線へ給電し得るインバータと、前記の電力検知器からの電力検知信号に基づき微小単位時間内における風力発電機の発生電力の平均値を求める演算器と、該演算器からの電力平均値信号及び電力検知器からの電力検知信号に基づき、現時点での風力発電機の発生電力が微小単位時間内における平均値を上回った際にコンバータを作動させて発生電力の平均値を上回った分を蓄電池へ給電し、現時点での風力発電機の発生電力が微小単位時間内における平均値を下回った際にインバータを作動させて発生電力の平均値を下回った分を電力線へ給電する制御器とを備えている。
【０００９】
本発明の請求項３に記載の風力発電出力安定化装置では、風力発電機から電力線へ給電すべき発生電力を検知する電力検知器と、風力発電機の発生電力を蓄電池へ給電し得るコンバータを蓄電池に蓄えられた電力を電力線へ給電し得るインバータと一体化した双方向電力変換手段と、前記の電力検知器からの電力検知信号に基づき微小単位時間内における風力発電機の発生電力の平均値を求める演算器と、該演算器からの電力平均値信号及び電力検知器からの電力検知信号に基づき、現時点での風力発電機の発生電力が微小単位時間内における平均値を上回った際に双方向電力変換手段を作動させて発生電力の平均値を上回った分を蓄電池へ給電し、現時点での風力発電機の発生電力が微小単位時間内における平均値を下回った際に双方向電力変換手段を作動させて発生電力の平均値を下回った分を電力線へ給電する制御器とを備えている。
【００１０】
本発明の請求項４に記載の風力発電出力安定化装置では、風力発電機から電力線へ給電すべき発生電力を検知する電力検知器と、モータ兼用発電機の二次巻線の励磁状態を変化させることにより風力発電機の発生電力を回転エネルギーに変換して蓄え得られ且つ当該回転エネルギーを電力に変換して電力線へ給電し得るフライホィール方式の電力貯蔵手段と、前記の電力検知器からの電力検知信号に基づき微小単位時間内における風力発電機の発生電力の平均値を求める演算器と、該演算器からの微小単位時間内の電力平均値信号及び電力検知器からの電力検知信号に基づき、現時点での風力発電機の発生電力が微小単位時間内における平均値を上回った際にモータ兼用発電機の二次巻線の励磁状態をモータ設定にして発生電力の平均値を上回った分を回転エネルギーに変換し、現時点での風力発電機の発生電力が微小単位時間内における平均値を下回った際にモータ兼用発電機の二次巻線の励磁状態を発電機設定にして発生電力の平均値を下回った分を回転エネルギーから電力に変換して電力線へ給電する制御器とを備えている。
【００１１】
本発明の請求項１に記載の風力発電出力安定化方法においては、現時点での風力発電機の発生電力と微小単位時間内における発生電力の平均値とを対比して、微小単位時間内における平均値よりも風力発電機の発生電力が高くなったときに、平均値を超過する分の電力を電力貯蔵手段に蓄え、また、微小単位時間内における平均値よりも風力発電機の発生電力が低くなったときに、平均値に対して不足する分の電力を電力貯蔵手段から電力線へ給電して、該給電線へ給電すべき電力の安定化を図る。
【００１２】
本発明の請求項２に記載の風力発電出力安定化装置においては、現時点での風力発電機の発生電力と微小単位時間内における発生電力の平均値とに基づき、制御器がコンバータあるいはインバータを作動させ、微小単位時間内における平均値よりも風力発電機の発生電力が高くなったときに、平均値を超過する分の電力をコンバータを介して蓄電池に蓄え、また、微小単位時間内における平均値よりも風力発電機の発生電力が低くなったときに、平均値に対して不足する分の電力を蓄電池からインバータを介して電力線へ給電して、該電力線へ給電すべき電力の安定化を図る。
【００１３】
本発明の請求項３に記載の風力発電出力安定化装置においては、現時点での風力発電機の発生電力と微小単位時間内における発生電力の平均値とに基づき、制御器が双方向電力変換手段を作動させ、微小単位時間内における平均値よりも風力発電機の発生電力が高くなったときに、平均値を超過する分の電力を双方向電力変換手段を介して蓄電池に蓄え、また、微小単位時間内における平均値よりも風力発電機の発生電力が低くなったときに、平均値に対して不足する分の電力を蓄電池から電力変換手段を介して電力線へ給電して、該電力線へ給電すべき電力の安定化を図る。
【００１４】
本発明の請求項４に記載の風力発電出力安定化装置においては、現時点での風力発電機の発生電力と微小単位時間内における発生電力の平均値とに基づき、制御器が電力貯蔵手段のモータ兼用発電機の二次巻線の励磁状態を調整し、微小単位時間内における平均値よりも風力発電機の発生電力が高くなったときに、平均値を超過する分の電力を回転エネルギーに変換して電力貯蔵手段に蓄え、また、微小単位時間内における平均値よりも風力発電機の発生電力が低くなったときに、平均値に対して不足する分の電力を電力貯蔵手段の回転エネルギーを電力に変化することにより電力線へ給電して、該電力線へ給電すべき電力の安定化を図る。
【００１５】
【発明の実施の形態】
以下、本発明の実施の形態を図面に基づき説明する。
【００１６】
図１は本発明の風力発電出力安定化装置の実施の形態の第１の例であり、図中、図６と同一の符号を付した部分は同一物を表している。
【００１７】
この風力発電安定化装置は、電力検知器８、蓄電池９、コンバータ１０、インバータ１１、演算器１２、及び制御器１３を備えている。
【００１８】
電力検知器８は、風力発電機３から電力線７へ給電すべき発生電力（ｋＷ）を検知して、電力検知信号８ｓを出力するようになっている。
【００１９】
コンバータ１０は、作動信号１０ｓが入力された際に、風力発電機３の発生電力を直流に変換して、蓄電池９へ給電するように構成されている。
【００２０】
インバータ１１は、作動信号１１ｓが入力された際に、蓄電池９に蓄えられている電力を交流に逆変換して、電力線７へ給電するように構成されている。
【００２１】
演算器１２は、電力検知器８からの電力検知信号８ｓに基づき、交流発電機本体２の発生電力の変動を微小単位時間（例えば１／１００秒）ごとに計測して微小単位時間内における発生電力の平均値を求め、電力平均値信号１２ｓを出力するように構成されている。
【００２２】
制御器１３は、演算器１２からの電力平均値信号１２ｓ及び電力検知器８からの電力検知信号８ｓに基づき、コンバータ１０あるいはインバータ１１へ作動信号１０ｓ，１１ｓを出力するように構成されている。
【００２３】
図１に示す風力発電出力安定化装置では、電力検知器８からの電力検知信号８ｓに基づき、演算器１２によって、微小単位時間内における風力発電機３の発生電力を求め、演算器１２から制御器１３に対して電力平均値信号１２ｓを出力する。
【００２４】
更に、演算器１２からの電力平均値信号１２ｓ及び前記の電力検知信号８ｓに基づき、制御器１３によって、現時点での風力発電機３の発生電力と微小単位時間内における発生電力平均値とを対比する。
【００２５】
現時点での風力発電機３の発生電力が、微小単位時間内における平均値よりも高くなっている場合には、制御器１３がコンバータ１０に作動信号１０ｓを出力し、平均値を超過する分の発生電力を、コンバータ１０により直流に変換して蓄電池９に蓄える。
【００２６】
現時点での風力発電機３の発生電力が、微小単位時間内における平均値よりも低くなっている場合には、制御器１３がインバータ１１に作動信号１１ｓを出力し、平均値に対して不足する分の電力を、蓄電池９の電力を交流に逆変換して電力線７へ給電する。
【００２７】
すなわち、風力発電機３の発生電力が図３に示すように変動すると、蓄電池９の電力の貯蔵及び放出が図４に示すように風力発電機３の発生電力の変動に応じて逆位相で行われ、これにより、電力線７へ給電される電力が図５に示すように安定化され、よって、需要対象に給電すべき電力の電圧及び周波数の変動を抑制することができる。
【００２８】
図２は本発明の風力発電出力安定化装置の実施の形態の第２の例であり、図中、図１と同一の符号を付した部分は同一物を表している。
【００２９】
この風力発電出力安定化装置は、電力検知器８、フライホィール方式の電力貯蔵手段１４、演算器１２、及び制御器１５を備えている。
【００３０】
電力貯蔵手段１４は、回転軸にフライホィール１６が取り付けられたモータ兼用発電機１７と、該モータ兼用発電機１７の二次巻線へ励磁電流１７ｓを給電するための励磁用インバータ１８とを有している。
【００３１】
この電力貯蔵手段１４は、モータ兼用発電機１７の二次巻線の励磁状態をモータ設定にすると、風力発電機３の発生電力がフライホィール１６の回転エネルギーに変換されて蓄えられ、また、モータ兼用発電機１７の二次巻線の励磁状態を発電機設定にすると、フライホィール１６の回転エネルギーが電力に変換されて電力線７へ給電されるように構成されている。
【００３２】
制御器１５は、演算器１２からの電力平均値信号１２ｓ及び電力検知器８からの電力検知信号８ｓに基づき、電力貯蔵手段１４の励磁用インバータ１８へ作動信号１８ｓを出力するように構成されている。
【００３３】
図２に示す風力発電出力安定化装置では、電力検知器８からの電力検知信号８ｓに基づき、演算器１２によって、微小単位時間内における風力発電機３の発生電力を求め、演算器１２から制御器１５に対して電力平均値信号１２ｓを出力する。
【００３４】
更に、演算器１２からの電力平均値信号１２ｓ及び前記の電力検知信号８ｓに基づき、制御器１５によって、現時点での風力発電機３の発生電力と微小単位時間内における発生電力平均値とを対比する。
【００３５】
現時点での風力発電機３の発生電力が、微小単位時間内における平均値よりも高くなっている場合には、制御器１５が励磁用インバータ１８に作動信号１８ｓを出力して、モータ兼用発電機１７の二次巻線の励磁状態をモータ設定とし、平均値を超過する分の電力を、モータ兼用発電機１７で回転エネルギーに変換することによりフライホィール１６を回転させる。
【００３６】
現時点での風力発電機３の発生電力が、微小単位時間内における平均値よりも低くなっている場合には、制御器１５が励磁用インバータ１８に作動信号１８ｓを出力して、モータ兼用発電機１７の二次巻線の励磁状態を発電機設定とし、平均値に対して不足する分の電力を、フライホィール１６の回転エネルギーを電力に変換して電力線７へ給電する。
【００３７】
すなわち、風力発電機３の発生電力が図３に示すように変動すると、電力貯蔵手段１４の電力の貯蔵及び放出が図４に示すように風力発電機３の発生電力の変動に応じて逆位相で行われ、これにより、電力線７へ給電される電力が図５に示すように安定化され、よって、需要対象に給電すべき電力の電圧及び周波数の変化を抑制することができる。
【００３８】
なお、本発明の風力発電出力安定化方法及び装置は上述した実施の形態のみに限定されるものではなく、図１におけるコンバータ１０及びインバータ１１に替えてコンバータ１０とインバータ１１とを一体化した双方向電力変換手段を用いた構成とすること、その他、本発明の要旨を逸脱しない範囲内において種々変更を加え得ることは勿論である。
【００３９】
【発明の効果】
以上述べたように本発明の風力発電出力安定化方法及び装置によれば、下記のような種々の優れた効果を奏し得る。
【００４０】
（１） 本発明の請求項１に記載の風力発電出力安定化方法においては、現時点での風力発電機の発生電力と微小単位時間内における発生電力の平均値とを対比して、微小単位時間内における平均値よりも風力発電機の発生電力が高くなったときに、平均値を超過する分の電力を電力貯蔵手段に蓄え、また、微小単位時間内における平均値よりも風力発電機の発生電力が低くなったときに、平均値に対して不足する分の電力を電力貯蔵手段から電力線へ給電するので、該給電線へ給電すべき電力の安定化が図られ、需要対象に給電すべき電力の電圧及び周波数の変化を抑制することができる。
【００４１】
（２） 本発明の請求項２に記載の風力発電出力安定化装置においては、現時点での風力発電機の発生電力と微小単位時間内における発生電力の平均値とに基づき、制御器がコンバータあるいはインバータを作動させ、微小単位時間内における平均値よりも風力発電機の発生電力が高くなったときに、平均値を超過する分の電力をコンバータを介して蓄電池に蓄え、また、微小単位時間内における平均値よりも風力発電機の発生電力が低くなったときに、平均値に対して不足する分の電力を蓄電池からインバータを介して電力線へ給電するので、該電力線へ給電すべき電力の安定化が図られ、需要対象へ給電すべき電力の電圧及び周波数の変化を抑制することができる。
【００４２】
（３） 本発明の請求項３に記載の風力発電出力安定化装置においては、現時点での風力発電機の発生電力と微小単位時間内における発生電力の平均値とに基づき、制御器が双方向電力変換手段を作動させ、微小単位時間内における平均値よりも風力発電機の発生電力が高くなったときに、平均値を超過する分の電力を双方向電力変換手段を介して蓄電池に蓄え、また、微小単位時間内における平均値よりも風力発電機の発生電力が低くなったときに、平均値に対して不足する分の電力を蓄電池から双方向電力変換手段を介して電力線へ給電するので、該電力線へ給電すべき電力の安定化が図られ、需要対象へ給電すべき電力の電圧及び周波数の変化を抑制することができる。
【００４３】
（４） 本発明の請求項４に記載の風力発電出力安定化装置においては、現時点での風力発電機の発生電力と微小単位時間内における発生電力の平均値とに基づき、制御器が電力貯蔵手段のモータ兼用発電機の二次巻線の励磁状態を調整し、微小単位時間内における平均値よりも風力発電機の発生電力が高くなったときに、平均値を超過する分の電力を回転エネルギーに変換して電力貯蔵手段に蓄え、また、微小単位時間内における平均値よりも風力発電機の発生電力が低くなったときに、平均値に対して不足する分の電力を電力貯蔵手段の回転エネルギーを電力に変化することにより電力線へ給電するので、該電力線へ給電すべき電力の安定化を図られ、需要対象へ給電すべき電力の電圧及び周波数の変化を抑制することができる。
【図面の簡単な説明】
【図１】本発明の風力発電出力安定化装置の実施の形態の第１の例の概念図である。
【図２】本発明の風力発電出力安定化装置の実施の形態の第２の例の概念図である。
【図３】風力発電機の発生電力の経時変化を示すグラフである。
【図４】電力貯蔵手段における電力の貯蔵及び放出の経時変化を示すグラフである。
【図５】電力線へ給電される電力の経時変化を示すグラフである。
【図６】風力発電を適用した発電設備の一例の概念図である。
【符号の説明】
３ 風力発電機
７ 電力線
８ 電力検知器
８ｓ 電力検知信号
９ 蓄電池（電力貯蔵手段）
１０ コンバータ
１１ インバータ
１２ 演算器
１２ｓ 電力平均値信号
１３ 制御器
１４ 電力貯蔵手段
１５ 制御器
１６ フライホィール
１７ モータ兼用発電機[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a wind power generation output stabilization method and apparatus.
[0002]
[Prior art]
In recent years, wind power generation has been implemented as one of means for converting energy existing in nature to electric power.
[0003]
FIG. 6 shows an example of a power generation facility to which wind power generation is applied. This power generation facility includes a wind power generator 3 that drives an AC generator main body 2 with a propeller 1 that receives wind power, and an AC generator main body 5 with a diesel engine 4. And a diesel generator 6 to be driven, and the power generated by the two generators 3 and 6 is supplied to the demand target through the same power line 7.
[0004]
[Problems to be solved by the invention]
In the power generation facility shown in FIG. 6, the generated power of the diesel generator 6 is determined by the output of the diesel engine 4, but the generated power of the wind power generator 3 varies as shown in FIG. The output voltage and frequency become unstable.
[0005]
For this reason, the output and rotational speed of the diesel engine 4 are adjusted according to the output of the wind power generator 3 to stabilize the power to be supplied to the demand target, or the rated generated power of the wind power generator 3 is set to diesel. It is necessary that the power to be supplied to the demand target does not exhibit a remarkable fluctuation as about 10 to 15% or less of the rated generated power of the generator 6.
[0006]
The present invention has been made in view of the above-described circumstances, and aims to stabilize power supplied from a wind power generator to a power line and suppress fluctuations in voltage and frequency.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, in the wind power generation output stabilization method according to claim 1 of the present invention, the fluctuation of the generated power to be fed from the wind power generator to the power line is measured every minute unit time, and within the minute unit time. When the average value of the generated power of the wind power generator is calculated, the average value is compared with the current generated power, and the current generated power of the wind power generator exceeds the average value within a minute unit time, An amount equal to the average value of the generated power is fed to the power line, and the amount exceeding the average value of the generated power is stored in the power storage means, and the current generated power of the wind power generator is below the average value within a minute unit time. In this case, all of the generated power is supplied to the power line, and the portion below the average value of the generated power is supplied from the power storage means to the power line.
[0008]
In the wind power generation output stabilizing device according to claim 2 of the present invention, a power detector for detecting generated power to be supplied from the wind power generator to the power line, and a converter capable of supplying the generated power of the wind power generator to the storage battery, An inverter that can supply power stored in the storage battery to the power line, an arithmetic unit that calculates an average value of the generated power of the wind power generator within a minute unit time based on the power detection signal from the power detector, and the calculation Based on the power average value signal from the generator and the power detection signal from the power detector , the average power generated by operating the converter when the current power generated by the wind power generator exceeds the average value within a minute unit time. When the value exceeding the value is supplied to the storage battery, when the current generated power of the wind power generator falls below the average value within a minute unit time, the inverter is activated to drop below the average value of the generated power. Other component and a controller for supplying power to the power line.
[0009]
Converter wind power output stabilizing device according to claim 3 of the present invention, that obtained a power detector for detecting the occurrence power to be power supply to the power line from the wind generator, the generated power of the wind power generator supplies power to the storage battery a bidirectional power conversion means and the electric power stored in the battery is integrated with the inverter capable of supplying power to the power lines, the average of the power generated in wind turbines in the power detection signal based in minute unit time from the power detector When the power generated by the wind power generator at the present time exceeds the average value within a minute unit time based on the calculator for calculating the value and the power average value signal from the calculator and the power detection signal from the power detector The bi-directional power conversion means is activated to supply power to the storage battery that exceeds the average value of the generated power, and when the current power generated by the wind power generator falls below the average value within a minute unit time, the bidirectional power And a controller for supplying power to the power line frequency falls below the average value of the power generated by operating the converter.
[0010]
In the wind power generation output stabilizing device according to claim 4 of the present invention, the power detector for detecting the generated power to be fed from the wind power generator to the power line and the excitation state of the secondary winding of the motor / generator are changed. The flywheel-type power storage means that can be stored by converting the generated power of the wind power generator into rotational energy and that can convert the rotational energy into electric power and feed the power line, and the power detector An arithmetic unit for obtaining an average value of the generated power of the wind power generator within a minute unit time based on the power detection signal, an electric power average value signal within the minute unit time from the computing unit, and a power detection signal from the power detector When the generated power of the wind power generator exceeds the average value within a minute unit time, the excitation value of the secondary winding of the motor / generator is set to the motor setting to raise the average value of the generated power. When the generated power of the wind power generator falls below the average value within a minute unit time, the excitation state of the secondary winding of the motor / generator is set as the generator setting. And a controller that converts the amount of generated power below the average value from rotational energy to electric power and supplies power to the power line .
[0011]
In the wind power generation output stabilization method according to claim 1 of the present invention, the average of the generated power of the wind power generator at the present time and the average value of the generated power in the minute unit time are compared. When the generated power of the wind power generator becomes higher than the value, the power that exceeds the average value is stored in the power storage means, and the generated power of the wind power generator is lower than the average value within a minute unit time. When this happens, power that is insufficient with respect to the average value is fed from the power storage means to the power line, and the power to be fed to the feed line is stabilized.
[0012]
In the wind power generation output stabilizing device according to claim 2 of the present invention, the controller operates the converter or the inverter based on the current generated power of the wind power generator and the average value of the generated power within a minute unit time. When the generated power of the wind power generator becomes higher than the average value within the minute unit time, the power exceeding the average value is stored in the storage battery via the converter, and the average value within the minute unit time When the generated power of the wind power generator becomes lower than that, power that is insufficient relative to the average value is supplied from the storage battery to the power line via the inverter, and the power to be supplied to the power line is stabilized. .
[0013]
In the wind power generation output stabilizing device according to claim 3 of the present invention, the controller is configured to perform bidirectional power conversion means based on the current generated power of the wind power generator and the average value of the generated power within a minute unit time. When the generated power of the wind power generator becomes higher than the average value within a minute unit time, the power exceeding the average value is stored in the storage battery via the bidirectional power conversion means. When the generated power of the wind power generator is lower than the average value within the unit time, power that is insufficient with respect to the average value is supplied from the storage battery to the power line via the power conversion means, and then supplied to the power line. Stabilize power to be used.
[0014]
In the wind power generation output stabilization device according to claim 4 of the present invention, the controller is a motor of the power storage means based on the current generated power of the wind power generator and the average value of the generated power within a minute unit time. By adjusting the excitation state of the secondary winding of the combined generator, when the generated power of the wind power generator is higher than the average value within a minute unit time, the power exceeding the average value is converted into rotational energy When the generated power of the wind power generator becomes lower than the average value within a minute unit time, the amount of power that is insufficient with respect to the average value is stored as the rotational energy of the power storage means. By changing to electric power, power is supplied to the power line, and the power to be supplied to the power line is stabilized.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0016]
FIG. 1 is a first example of an embodiment of a wind power generation output stabilizing device according to the present invention. In the figure, the same reference numerals as those in FIG. 6 denote the same components.
[0017]
This wind power generation stabilization device includes a power detector 8, a storage battery 9, a converter 10, an inverter 11, a calculator 12, and a controller 13.
[0018]
The power detector 8 detects the generated power (kW) to be fed from the wind power generator 3 to the power line 7 and outputs a power detection signal 8s.
[0019]
The converter 10 is configured to convert the electric power generated by the wind power generator 3 into direct current and supply power to the storage battery 9 when the operation signal 10 s is input.
[0020]
The inverter 11 is configured to reversely convert electric power stored in the storage battery 9 into alternating current and to supply power to the power line 7 when the operation signal 11 s is input.
[0021]
Based on the power detection signal 8 s from the power detector 8, the computing unit 12 measures fluctuations in the generated power of the AC generator main body 2 every minute unit time (for example, 1/100 second) and generates it within the minute unit time. An average value of power is obtained, and a power average value signal 12s is output.
[0022]
The controller 13 is configured to output the operation signals 10 s and 11 s to the converter 10 or the inverter 11 based on the power average value signal 12 s from the calculator 12 and the power detection signal 8 s from the power detector 8.
[0023]
In the wind power generation output stabilizing device shown in FIG. 1, based on the power detection signal 8 s from the power detector 8, the power generated by the wind power generator 3 within a minute unit time is obtained by the calculator 12 and controlled from the calculator 12. The power average value signal 12 s is output to the device 13.
[0024]
Further, based on the power average value signal 12s from the arithmetic unit 12 and the power detection signal 8s, the controller 13 compares the generated power of the wind power generator 3 at the present time with the generated power average value within a minute unit time. To do.
[0025]
When the current generated power of the wind power generator 3 is higher than the average value within a minute unit time, the controller 13 outputs the operation signal 10 s to the converter 10 and exceeds the average value. The generated power is converted into direct current by the converter 10 and stored in the storage battery 9.
[0026]
When the generated power of the wind power generator 3 at the present time is lower than the average value within a minute unit time, the controller 13 outputs the operation signal 11s to the inverter 11 and is insufficient with respect to the average value. Then, the power of the storage battery 9 is reversely converted into alternating current, and the power is fed to the power line 7.
[0027]
That is, when the generated power of the wind power generator 3 fluctuates as shown in FIG. 3, the storage and release of the power of the storage battery 9 is performed in the opposite phase according to the fluctuation of the generated power of the wind power generator 3 as shown in FIG. As a result, the power supplied to the power line 7 is stabilized as shown in FIG. 5, and thus fluctuations in the voltage and frequency of the power to be supplied to the demand target can be suppressed.
[0028]
FIG. 2 shows a second example of the embodiment of the wind power generation output stabilizing device of the present invention. In the figure, the same reference numerals as those in FIG. 1 denote the same components.
[0029]
The wind power generation output stabilizing device includes a power detector 8, a flywheel power storage unit 14, a calculator 12, and a controller 15.
[0030]
The power storage means 14 includes a motor / generator 17 having a flywheel 16 attached to a rotating shaft, and an excitation inverter 18 for supplying an excitation current 17s to the secondary winding of the motor / generator 17. is doing.
[0031]
When the excitation state of the secondary winding of the motor / generator 17 is set to motor setting, the power storage means 14 converts the electric power generated by the wind power generator 3 into rotational energy of the flywheel 16 and stores it. When the excitation state of the secondary winding of the dual-purpose generator 17 is set to the generator setting, the rotational energy of the flywheel 16 is converted into electric power and supplied to the power line 7.
[0032]
The controller 15 is configured to output an operation signal 18 s to the excitation inverter 18 of the power storage unit 14 based on the power average value signal 12 s from the calculator 12 and the power detection signal 8 s from the power detector 8. Yes.
[0033]
In the wind power generation output stabilizing device shown in FIG. 2, based on the power detection signal 8 s from the power detector 8, the power generated by the wind power generator 3 within a minute unit time is obtained by the calculator 12 and controlled from the calculator 12. The power average value signal 12 s is output to the device 15.
[0034]
Further, based on the power average value signal 12s from the calculator 12 and the power detection signal 8s, the controller 15 compares the generated power of the wind power generator 3 at the present time with the generated power average value within a minute unit time. To do.
[0035]
When the generated power of the wind power generator 3 at the present time is higher than the average value within a minute unit time, the controller 15 outputs an operation signal 18s to the excitation inverter 18, and the motor / generator The excitation state of the secondary winding 17 is set as a motor, and the flywheel 16 is rotated by converting the electric power exceeding the average value into rotational energy by the motor / generator 17.
[0036]
When the generated power of the wind power generator 3 at the present time is lower than the average value within a minute unit time, the controller 15 outputs an operation signal 18s to the excitation inverter 18, and the motor / generator The excitation state of the secondary winding 17 is set as a generator setting, and power that is insufficient with respect to the average value is supplied to the power line 7 by converting the rotational energy of the flywheel 16 into electric power.
[0037]
That is, when the generated power of the wind power generator 3 fluctuates as shown in FIG. 3, the storage and release of the power of the power storage means 14 are in reverse phase according to the fluctuation of the generated power of the wind power generator 3 as shown in FIG. 4. As a result, the power supplied to the power line 7 is stabilized as shown in FIG. 5, so that changes in the voltage and frequency of the power to be supplied to the demand target can be suppressed.
[0038]
Note that the wind power generation output stabilization method and apparatus of the present invention is not limited to the above-described embodiment, and both the converter 10 and the inverter 11 are integrated in place of the converter 10 and the inverter 11 in FIG. Of course, various modifications can be made without departing from the gist of the present invention, in addition to the configuration using the direct power conversion means.
[0039]
【The invention's effect】
As described above, according to the wind power generation output stabilizing method and apparatus of the present invention, the following various excellent effects can be obtained.
[0040]
(1) In the wind power generation output stabilization method according to claim 1 of the present invention, the current generated power of the wind power generator is compared with the average value of the generated power within the minute unit time, so that the minute unit time is obtained. When the generated power of the wind power generator becomes higher than the average value in the power, the power exceeding the average value is stored in the power storage means, and the wind power generator is generated more than the average value in the minute unit time. When the power becomes low, power that is insufficient with respect to the average value is supplied from the power storage means to the power line, so that the power to be supplied to the power supply line is stabilized and should be supplied to the demand target. Changes in the voltage and frequency of power can be suppressed.
[0041]
(2) In the wind power generation output stabilizing device according to claim 2 of the present invention, the controller is a converter or a converter based on the current generated power of the wind power generator and the average value of the generated power within a minute unit time. When the inverter is activated and the generated power of the wind power generator becomes higher than the average value within the minute unit time, the power exceeding the average value is stored in the storage battery via the converter, and within the minute unit time. When the generated power of the wind power generator is lower than the average value in, power that is insufficient with respect to the average value is supplied from the storage battery to the power line via the inverter, so that the power to be supplied to the power line is stable. Thus, changes in voltage and frequency of power to be supplied to the demand target can be suppressed.
[0042]
(3) In the wind power generation output stabilizing device according to claim 3 of the present invention, the controller is bi-directional based on the current generated power of the wind power generator and the average value of the generated power within a minute unit time. When the power conversion means is operated and the generated power of the wind power generator becomes higher than the average value within a minute unit time, the power exceeding the average value is stored in the storage battery via the bidirectional power conversion means, In addition, when the generated power of the wind power generator becomes lower than the average value within a minute unit time, power shortage from the average value is supplied from the storage battery to the power line via the bidirectional power conversion means. The power to be fed to the power line can be stabilized, and the change in voltage and frequency of the power to be fed to the demand target can be suppressed.
[0043]
(4) In the wind power generation output stabilizing device according to claim 4 of the present invention, the controller stores power based on the current generated power of the wind power generator and the average value of the generated power within a minute unit time. By adjusting the excitation state of the secondary winding of the motor combined generator of the means, when the generated power of the wind power generator is higher than the average value within a minute unit time, the power exceeding the average value is rotated It is converted into energy and stored in the power storage means, and when the generated power of the wind power generator becomes lower than the average value within a minute unit time, the power storage means stores the power shortage relative to the average value. Since power is supplied to the power line by changing the rotational energy into electric power, the power to be supplied to the power line can be stabilized, and changes in the voltage and frequency of the power to be supplied to the demand target can be suppressed.
[Brief description of the drawings]
FIG. 1 is a conceptual diagram of a first example of an embodiment of a wind power generation output stabilizing device of the present invention.
FIG. 2 is a conceptual diagram of a second example of the embodiment of the wind power generation output stabilizing device of the present invention.
FIG. 3 is a graph showing a change with time of generated power of a wind power generator.
FIG. 4 is a graph showing temporal changes in the storage and release of electric power in the electric power storage means.
FIG. 5 is a graph showing a change with time of power supplied to a power line.
FIG. 6 is a conceptual diagram of an example of a power generation facility to which wind power generation is applied.
[Explanation of symbols]
3 wind power generator 7 power line 8 power detector 8s power detection signal 9 storage battery (power storage means)
DESCRIPTION OF SYMBOLS 10 Converter 11 Inverter 12 Calculator 12s Average power value signal 13 Controller 14 Power storage means 15 Controller 16 Flywheel 17 Motor / generator

Claims (4)

風力発電機から電力線へ給電すべき発生電力の変動を微小単位時間ごとに計測して微小単位時間内における風力発電機の発生電力の平均値を求め、当該平均値と現時点での発生電力とを対比し、現時点での風力発電機の発生電力が微小単位時間内における平均値を上回った際に、当該発生電力の平均値に等しい分を電力線へ給電し且つ発生電力の平均値を上回った分を電力貯蔵手段に蓄え、現時点での風力発電機の発生電力が微小単位時間内における平均値を下回った際に、発生電力の全てを電力線へ給電し且つ発生電力の平均値を下回った分を電力貯蔵手段から電力線へ給電することを特徴とする風力発電出力安定化方法。The fluctuation of the generated power to be supplied from the wind power generator to the power line is measured every minute unit time to obtain the average value of the generated power of the wind power generator within the minute unit time, and the average value and the current generated power are calculated. In contrast, when the current power generated by the wind power generator exceeds the average value within a minute unit time, the amount equal to the average value of the generated power is supplied to the power line and the average value of the generated power is exceeded. Is stored in the power storage means, and when the current generated power of the wind power generator falls below the average value within a minute unit time, all the generated power is fed to the power line and the amount below the average generated power is A method for stabilizing wind power generation output, wherein power is supplied from a power storage means to a power line. 風力発電機から電力線へ給電すべき発生電力を検知する電力検知器と、風力発電機の発生電力を蓄電池へ給電し得るコンバータと、蓄電池に蓄えられた電力を電力線へ給電し得るインバータと、前記の電力検知器からの電力検知信号に基づき微小単位時間内における風力発電機の発生電力の平均値を求める演算器と、該演算器からの電力平均値信号及び電力検知器からの電力検知信号に基づき、現時点での風力発電機の発生電力が微小単位時間内における平均値を上回った際にコンバータを作動させて発生電力の平均値を上回った分を蓄電池へ給電し、現時点での風力発電機の発生電力が微小単位時間内における平均値を下回った際にインバータを作動させて発生電力の平均値を下回った分を電力線へ給電する制御器とを備えてなることを特徴とする風力発電出力安定化装置。A power detector for detecting generated power to be fed from the wind power generator to the power line, a converter capable of feeding the generated power of the wind power generator to the storage battery, an inverter capable of feeding the power stored in the storage battery to the power line, and An arithmetic unit for obtaining an average value of the generated power of the wind power generator within a minute unit time based on the power detection signal from the power detector, and the power average value signal from the calculator and the power detection signal from the power detector Based on the above, when the generated power of the wind power generator exceeds the average value within a minute unit time, the converter is activated to supply the storage battery with the power that exceeds the average generated power, and the current wind power generator Japanese that is generated power is a control unit for supplying power to the power line frequency falls below the average value of the power generated by operating the inverter when below the average value within a minute unit of time Wind power output stabilizing device according to. 風力発電機から電力線へ給電すべき発生電力を検知する電力検知器と、風力発電機の発生電力を蓄電池へ給電し得るコンバータを蓄電池に蓄えられた電力を電力線へ給電し得るインバータと一体化した双方向電力変換手段と、前記の電力検知器からの電力検知信号に基づき微小単位時間内における風力発電機の発生電力の平均値を求める演算器と、該演算器からの電力平均値信号及び電力検知器からの電力検知信号に基づき、現時点での風力発電機の発生電力が微小単位時間内における平均値を上回った際に双方向電力変換手段を作動させて発生電力の平均値を上回った分を蓄電池へ給電し、現時点での風力発電機の発生電力が微小単位時間内における平均値を下回った際に双方向電力変換手段を作動させて発生電力の平均値を下回った分を電力線へ給電する制御器とを備えてなることを特徴とする風力発電出力安定化装置。 Integrated from the wind power generator and a power detector for detecting the occurrence power to be power supply to the power line, an inverter that generation power of the wind power generator can power the power accumulated converter that obtained by feeding to the storage battery to the battery to the power line and a bidirectional power conversion means has a computing unit for obtaining an average value of the power generated in wind turbines in the power detection signal on the basis of the minute unit of time from the power detector, the electric power mean value signal and from the arithmetic unit Based on the power detection signal from the power detector, when the current generated power of the wind power generator exceeded the average value within a minute unit time, the bidirectional power conversion means was activated to exceed the average value of the generated power When the generated power of the wind power generator falls below the average value within a minute unit time, the bidirectional power conversion means is activated to reduce the amount below the average generated power. Wind power output stabilizing apparatus characterized by comprising a control unit for supplying power to the power line. 風力発電機から電力線へ給電すべき発生電力を検知する電力検知器と、モータ兼用発電機の二次巻線の励磁状態を変化させることにより風力発電機の発生電力を回転エネルギーに変換して蓄え得られ且つ当該回転エネルギーを電力に変換して電力線へ給電し得るフライホィール方式の電力貯蔵手段と、前記の電力検知器からの電力検知信号に基づき微小単位時間内における風力発電機の発生電力の平均値を求める演算器と、該演算器からの微小単位時間内の電力平均値信号及び電力検知器からの電力検知信号に基づき、現時点での風力発電機の発生電力が微小単位時間内における平均値を上回った際にモータ兼用発電機の二次巻線の励磁状態をモータ設定にして発生電力の平均値を上回った分を回転エネルギーに変換し、現時点での風力発電機の発生電力が微小単位時間内における平均値を下回った際にモータ兼用発電機の二次巻線の励磁状態を発電機設定にして発生電力の平均値を下回った分を回転エネルギーから電力に変換して電力線へ給電する制御器とを備えてなることを特徴とする風力発電出力安定化装置。Converts the power generated by the wind power generator into rotational energy by changing the excitation state of the secondary winding of the motor-generator and the power detector that detects the power to be supplied from the wind power generator to the power line. The flywheel type power storage means that can convert the rotational energy into electric power and supply the power line, and the generated power of the wind power generator within a minute unit time based on the electric power detection signal from the electric power detector. Based on the computing unit for obtaining the average value, the average power signal in the minute unit time from the computing unit and the power detection signal from the power detector , the current generated power of the wind power generator is averaged in the minute unit time. When the value exceeds the value, the excitation state of the secondary winding of the motor / generator is set to the motor setting, and the amount exceeding the average value of the generated power is converted into rotational energy. When the generated power of the generator falls below the average value within a minute unit time, the excitation state of the secondary winding of the motor / generator is set as the generator, and the amount below the average generated power is converted from rotational energy to power And a controller for supplying power to the power line .
JP10279798A 1998-04-14 1998-04-14 Wind power output stabilization method and apparatus Expired - Fee Related JP3758359B2 (en)

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