JP4475843B2 - Control method of power generation system combining wind power generation and diesel power generation, and power generation system combining wind power generation and diesel power generation - Google Patents

Control method of power generation system combining wind power generation and diesel power generation, and power generation system combining wind power generation and diesel power generation Download PDF

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JP4475843B2
JP4475843B2 JP2001124875A JP2001124875A JP4475843B2 JP 4475843 B2 JP4475843 B2 JP 4475843B2 JP 2001124875 A JP2001124875 A JP 2001124875A JP 2001124875 A JP2001124875 A JP 2001124875A JP 4475843 B2 JP4475843 B2 JP 4475843B2
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wind power
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正人 後藤
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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
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Description

【０００１】
【発明の属する技術分野】
本発明は、風車を利用した発電、いわゆる風力発電と、ディーゼル機関を利用した発電、いわゆるディーゼル発電とを組み合わせた発電システムに関する。
【０００２】
【従来の技術】
例えば離島のような立地条件の地域においては、風力発電によって得られた電力を同地域内の各需要家に供給しているが、近年、エアコン等の普及が目覚ましいこと等から、将来的に当該地域の夏場の電力需要が拡大し、従来の風力発電だけでは需要に見合った電力供給が不可能となる可能性がでてきた。
【０００３】
このような電力供給の不足を補うべく、従来の風力発電にディーゼル発電を組み合わせた発電システムの開発が進められている。こういった、いわゆるハイブリッド型の発電システムにおいては、風車によって風の力を電力に変換して需要家に供給しながら余剰の電力を蓄電池に蓄えておき、需要の急激な拡大によって風力発電だけではすべてを賄うことができないときには併せてディーゼル発電を行って破断なく電力供給を行うようになっている。
【０００４】
ところで、風力発電は当然のごとく気象状況の変化の影響を受け易いため、上記のようなハイブリッド型の発電システムには蓄電池が備えられている。そして、風力発電によって余剰の電力が生産される間にその電力を蓄電池に蓄えておき、例えば風車がトリップ状態（風が急に止んで発電ができなくなる状態）に陥った場合にはその分の電力を蓄電池から補って電力供給を継続する。
【０００５】
【発明が解決しようとする課題】
上記のようなハイブリッド型の発電システムにおいては次のような問題点が指摘されている。
すなわち、風力発電の出力変動が起こるたびに蓄電池を駆動するため、蓄電池の使用頻度が高く、そのため耐用期間が比較的短い。蓄電池は耐用期間が過ぎる前に新規なものに交換する必要があるが、非常に大型であるため、蓄電池自体が高価なことに加えて設置工事に掛かる費用も安価には賄えない。
【０００６】
本発明は上記の事情に鑑みてなされたものであり、蓄電池の使用頻度を低くして上記のような設備費の高騰を抑えることを目的としている。
【０００７】
【課題を解決するための手段】
上記課題を解決するために、本発明は、風力発電設備と複数のディーゼル機関を備えたディーゼル発電設備とを組み合わせ、さらに風力発電による出力変動を吸収する蓄電池を備えた発電システムの制御方法であって、前記風力発電設備の単位時間当たりに低下する出力電力の変化が第１の値を逸脱した場合は、前記蓄電池から放電して出力補完を行うとともに、新たに前記ディーゼル機関を駆動し、該ディーゼル発電設備の発電量の増加とともに前記蓄電池からの電力供給量を低下させることを特徴とする風力発電とディーゼル発電とを組み合わせた発電システムの制御方法を提供する。
【０００８】
また、上記風力発電とディーゼル発電とを組み合わせた発電システムの制御方法において、前記第１の値は、前記風力発電設備が前記蓄電池を使わず単独で電力供給可能な上限値であることが好ましい。
【０００９】
本発明に係る発電システムの制御方法においては、出力低下の変化率の見極めを第１の値として、変化率が第１の値を逸脱した場合は、前記蓄電池から放電して出力補完を行うとともに新たに前記ディーゼル機関を駆動し、該ディーゼル発電設備によって発電される出力の増加とともに前記蓄電池からの電力供給量を低下させることにより、蓄電池の駆動の頻度を少なく抑えられる。これにより、耐用期間の延長を図って蓄電池の交換に要するコスト（蓄電池自体の価格や工事費用等）の削減が可能である。
【００１０】
また、上記風力発電とディーゼル発電とを組み合わせた発電システムの制御方法において、前記出力低下の変化率が第１の値を逸脱した場合は、出力低下の変化率を第１の値より大である第２の値に保持することが好ましい。
【００１１】
出力低下の変化率の見極めを第１、第２の値（第１の値＜第２の値、ただし第１の値以下であれば蓄電池を使わずに電力供給が可能である）とすることで、変化率が第１の値を逸脱した場合は第２の値に保持した上で、蓄電池から出力補完を行うことができるので、蓄電池の駆動の頻度を少なく抑えられる。
【００１２】
また、本発明は、風力発電設備と複数のディーゼル機関を備えたディーゼル発電設備とを組み合わせ、さらに風力発電による出力変動を吸収する蓄電池を備えた発電システムの制御方法であって、前記風力発電設備の出力拡大を実施しても設定された出力に満たない場合に、前記蓄電池から放電して出力補完を行うとともに、前記ディーゼル発電設備の起動機関数を調整し、前記風力発電設備と前記ディーゼル発電設備とによって生産される電力が需要に見合う量に落ち着けば前記蓄電池の駆動を停止することを特徴とする風力発電とディーゼル発電とを組み合わせた発電システムの制御方法を提供する。
【００１３】
前記風力発電設備の出力拡大では設定された出力に満たない場合に、前記蓄電池から放電して出力補完を行うとともに、前記ディーゼル発電設備の起動機関数を調整する。そして、前記風力発電設備と前記ディーゼル発電設備とによって生産される電力が需要に見合う量に落ち着けば前記蓄電池の駆動を停止する。このため、風力発電設備の回転エネルギー蓄積効果、及び蓄電池の働きによって出力電力が一定に保たれるので、発電システムの系統周波数に殆ど影響を与えない。
【００１４】
本発明は、風力発電設備と複数のディーゼル機関を備えたディーゼル発電設備とを組み合わせ、さらに風力発電による出力変動を吸収する蓄電池を備えた発電システムであって、前記風力発電設備の単位時間当たりに低下する出力電力の変化が第１の値を逸脱した場合は、前記蓄電池から放電して出力補完を行うとともに、新たに前記ディーゼル機関を駆動し、該ディーゼル発電設備の発電量の増加とともに前記蓄電池からの電力供給量を低下させることを特徴とする風力発電とディーゼル発電とを組み合わせた発電システムを提供する。
【００１５】
上記風力発電とディーゼル発電とを組み合わせた発電システムにおいて、前記第１の値は、前記風力発電設備が前記蓄電池を使わず単独で電力供給可能な上限値であることが好ましい。
【００１６】
上記風力発電とディーゼル発電とを組み合わせた発電システムにおいて、前記出力低下の変化率が第１の値を逸脱した場合は、出力低下の変化率を第１の値より大である第２の値に保持することが好ましい。
【００１７】
また、本発明は、風力発電設備と複数のディーゼル機関を備えたディーゼル発電設備とを組み合わせ、さらに風力発電による出力変動を吸収する蓄電池を備えた発電システムであって、前記風力発電設備の出力拡大を実施しても設定された出力に満たない場合に、前記蓄電池から放電して出力補完を行うとともに、前記ディーゼル発電設備の起動機関数を調整し、前記風力発電設備と前記ディーゼル発電設備とによって生産される電力が需要に見合う量に落ち着けば前記蓄電池の駆動を停止することを特徴とする風力発電とディーゼル発電とを組み合わせた発電システムを提供する。
【００１８】
また、風力発電設備に放熱ヒータを設け、蓄電池を満たしてさらに余剰の電力を熱に変換して大気中に廃棄することにより、蓄電池の容量を過剰に大型化する必要がない。これにより、耐用期間の延長を図って蓄電池の交換に要するコスト（先程と同じく、蓄電池自体の価格や工事費用等）の削減が可能である。
【００１９】
【発明の実施の形態】
本発明の実施形態を図１に示して説明する。
図１は本発明に係る風力発電とディーゼル発電とを組み合わせた発電システムの全体概要を示す図である。図において、符号１は風車を利用する風力発電設備、２はディーゼル機関を利用するディーゼル発電設備を示す。
【００２０】
風力発電設備１には、風車３、蓄電池４、放熱ヒータ５、ならびにこれら各機器を制御する風力発電制御装置６が設けられている（風力発電設備１については特開平９−３２４７４０号公報「風力発電装置」も参照されたい）。また、ディーゼル発電設備２には、複数のディーゼル機関７と、これらを制御するディーゼル発電制御装置８とが設けられている。
【００２１】
風車３には、羽根の回転エネルギー蓄積効果（フライホイール効果）によって出力の安定化を図るタイプが採用されている。
【００２２】
蓄電池４、放熱ヒータ５は風車３によって発電された電力の供給系統９に接続されている。該電力供給系統９には、風車３によって発電された交流出力を直流出力に一旦変換するコンバータ１０と、変換された直流出力を再び交流出力に変換するインバータ１１とが設けられており、蓄電池４はコンバータ１０とインバータ１１との間に充放電器１２を介して接続されている。一方、放熱ヒータ５はコンバータ１０とインバータ１１との間に整流器１３を介して接続されている。
【００２３】
風力発電制御装置６とディーゼル発電制御装置８とは、光ケーブル１４を利用した通信回線で接続されている。これにより、２つの発電設備は必ずしも同じ敷地内に隣接する必要はなく、遠方に離間して構築されることも問題はない。例えば、ディーゼル発電設備２を市街地に隣接して構築し、風力発電設備１は離島等市街地から遠い地域に構築して両者を光ケーブル１４で接続することも可能である。
【００２４】
上記のように構成された発電システムの稼働について説明する。なお、以下では蓄電池４に充電がなされた状態を前提にして説明を進めることにする。
［１．平穏時］
あらかじめ設定された出力に対し、風力発電設備１において風車３のピッチ制御により出力抑制を実施しても生産される電力が多くなる場合（各需要家において消費される電力が比較的少ないことによる）は、放熱ヒータ５を駆動して余剰電力を熱エネルギーとして大気中に放出する。この間に、ディーゼル発電設備２は電力需要の総量によって起動される機関数を調整（減少）され、風力発電設備１とディーゼル発電設備２とによって生産される電力が需要に見合う量に落ち着けば放熱ヒータ５の駆動は停止される。
【００２５】
また、あらかじめ設定された出力に対し、風車３のピッチ制御により出力拡大を実施しても生産される電力が少なくなる場合（各需要家において消費される電力が比較的多いことによる）は、不足分の電力を蓄電池４から補って電力供給を継続する。この間に、ディーゼル発電設備２は電力需要の総量によって起動される機関数を調整（増加）され、風力発電設備１とディーゼル発電設備２とによって生産される電力が需要に見合う量に落ち着けば蓄電池４の駆動は停止される。
なお、この運転モードの場合は、風車３の回転エネルギー蓄積効果、および蓄電池４の働きによって出力電力が一定に保たれるので、発電システムの系統周波数にはほとんど影響を与えることはない。
【００２６】
［２．風速急変時］
風の状態が変わり、風速が急変すると、風車３の回転数が急激に低下することがある。この場合、風車３によって得られる電力も急激に低下するので、これを検知して蓄電池４から瞬時に必要電力が放電される。これにより、風力発電設備１の出力電力が大きく変動することはない。
【００２７】
［３．風速減衰時］
風の状態が徐々に変化し、風速が少しずつ減衰すると、それに追従して風車３のピッチ制御がなされ、回転エネルギー蓄積効果と併せて風車３によって得られる電力の出力低下が補われる。この場合の出力低下の変化率（単位時間当たりに低下する出力電力の変化）は５ｋＷ／ｓ（第１の値）となり、発電システムがディーゼル発電設備の出力変動を最小限に抑え、系統の周波数の乱れを防止する。
【００２８】
引き続いて風速が減衰して風車３が出力変化率を第１の値に保持できなくなると出力変化率を３５ｋＷ／ｓ（第２の値）に変更し、第１の値の変化率と同等の出力電力となるように不足分の電力が蓄電池４から瞬時に供給される。
さらに風速が落ち込み風車３が停止した場合や、風車３に異常が発生し、出力が急止（トリップ）した場合は、停止する直前の出力電力と同等の電力が蓄電池４から瞬時に供給される。これにより、電力供給が瞬断することなく継続され、各需要家に向けて安定した電力供給が行われる。
【００２９】
ただし、蓄電池４からの電力供給には限度があるため、その後徐々に蓄電池４からの供給量を低下させるとともに、新たに起動させたディーゼル機関７の発電量を増加させ、起動状態にあるすべてのディーゼル機関７による発電量が電力需要の総量に達したところで蓄電池４からの電力供給を停止する。
【００３０】
所定の時間が経過する間に風速が増加に転じれば、準備を整えたディーゼル発電設備２の起動は取り止め、平時の運転に戻る。
【００３１】
【発明の効果】
以上説明したように、本発明に係る発電システムの制御方法によれば、出力の変化率の見極めを第１、第２の値（第１の値＜第２の値、ただし第１の値以下であれば蓄電池を使わずに電力供給が可能である）として、出力の変化率を第１の値に保持し、ディーゼル発電設備の出力変動を抑えて出力の変化率が第1の値を逸脱した場合は第2の値に保持するとともに蓄電池から出力補完を行い、さらに風力発電設備の出力が停止した場合は蓄電池から放電して出力補完を行うとともにディーゼル発電設備を駆動し、該ディーゼル発電設備によって発電される出力が安定したら蓄電池の駆動を停止することにより、蓄電池の駆動の頻度を少なく抑えられるので、耐用期間の延長を図って蓄電池の交換に要する各種コストの削減を図ることができる。
【００３２】
本発明に係る発電システムによれば、蓄電池を風車の電力供給系統に充放電器を介して接続したことにより、余剰電力の蓄電、および電力供給の補完が瞬時に行えるので、風力発電とディーゼル発電との連携を円滑に実施することができる。
【００３３】
また、本発明に係る発電システムによれば、風力発電設備に放熱ヒータを設け、蓄電池を満たしてさらに余剰の電力を熱に変換して大気中に廃棄することにより、蓄電池の容量を過剰に大型化する必要がないので、蓄電池の設置に要する各種コストの削減を図ることができる。
【００３４】
【図面の簡単な説明】
【図１】本発明に係る風力発電とディーゼル発電とを組み合わせた発電システムの全体概要を示す図である。
【符号の説明】
１ 風力発電設備
２ ディーゼル発電設備
３ 風車
４ 蓄電池
５ 放熱ヒータ
６ 風力発電制御装置
７ ディーゼル機関
８ ディーゼル発電制御装置
９ 電力供給系統
１０ コンバータ
１１ インバータ
１２ 充放電器
１３ 整流器
１４ 光ケーブル[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a power generation system that combines power generation using a windmill, so-called wind power generation, and power generation using a diesel engine, so-called diesel power generation.
[0002]
[Prior art]
For example, in an area with remote location such as a remote island, the power generated by wind power generation is supplied to each customer in the area. Electricity demand in the summer in the region has expanded, and it has become possible that conventional wind power generation alone will not be able to supply power that meets demand.
[0003]
In order to make up for such a shortage of power supply, development of a power generation system in which diesel power generation is combined with conventional wind power generation is in progress. In such a so-called hybrid power generation system, wind power is converted into electric power by a windmill and supplied to the consumer while surplus power is stored in a storage battery. When everything cannot be covered, diesel power generation is also performed to supply power without breaking.
[0004]
Incidentally, since wind power generation is naturally susceptible to changes in weather conditions, the hybrid power generation system as described above is provided with a storage battery. And while surplus power is produced by wind power generation, that power is stored in the storage battery. For example, if the windmill falls into a trip state (a state where the wind suddenly stops and power generation cannot be performed) Supply power from the storage battery and continue power supply.
[0005]
[Problems to be solved by the invention]
The following problems have been pointed out in the hybrid power generation system as described above.
That is, since the storage battery is driven each time the output fluctuation of the wind power generation occurs, the use frequency of the storage battery is high, and therefore the service life is relatively short. The storage battery needs to be replaced with a new one before the end of its useful life. However, since the storage battery is very large, the storage battery itself is expensive and the installation work cannot be inexpensively covered.
[0006]
The present invention has been made in view of the above circumstances, and aims to reduce the frequency of use of a storage battery and suppress the increase in the equipment cost as described above.
[0007]
[Means for Solving the Problems]
In order to solve the above problems, the present invention is a method for controlling a power generation system comprising a combination of a wind power generation facility and a diesel power generation facility including a plurality of diesel engines, and further comprising a storage battery that absorbs output fluctuations due to wind power generation. When the change in the output power that decreases per unit time of the wind power generation facility deviates from the first value, the battery is discharged from the storage battery to complement the output, and the diesel engine is newly driven, Provided is a method for controlling a power generation system that combines wind power generation and diesel power generation, characterized in that the power supply amount from the storage battery is reduced as the power generation amount of a diesel power generation facility increases.
[0008]
In the method for controlling a power generation system that combines wind power generation and diesel power generation, the first value is preferably an upper limit value at which the wind power generation facility can supply power independently without using the storage battery.
[0009]
In the control method of the power generation system according to the present invention, the output rate change rate is determined as the first value, and when the rate of change deviates from the first value , the storage battery is discharged to complement the output. drives new the diesel engine, by decreasing the amount of power supplied from the battery to increase together with the output that is generated by the diesel power plant is suppressed less frequent driving battery. As a result, it is possible to reduce the cost required for replacement of the storage battery (price of the storage battery itself, construction cost, etc.) by extending the useful life.
[0010]
Further, in the control method of the power generation system combining the wind power generation and the diesel power generation, when the change rate of the output decrease deviates from the first value, the change rate of the output decrease is larger than the first value. It is preferable to hold at the second value .
[0011]
Assess the rate of change in output drop to the first and second values (first value <second value, but if it is less than or equal to the first value, power can be supplied without using a storage battery) Thus, when the rate of change deviates from the first value, the output can be complemented from the storage battery while maintaining the second value, so that the frequency of driving the storage battery can be reduced.
[0012]
The present invention also relates to a method for controlling a power generation system comprising a combination of a wind power generation facility and a diesel power generation facility including a plurality of diesel engines, and further comprising a storage battery that absorbs output fluctuations due to wind power generation, the wind power generation facility If the output is less than the set output even when the output is expanded, the output is complemented by discharging from the storage battery, and the number of starting engines of the diesel power generation equipment is adjusted, and the wind power generation equipment and the diesel power generation are adjusted. Provided is a method for controlling a power generation system that combines wind power generation and diesel power generation, characterized in that the drive of the storage battery is stopped when the amount of power produced by the equipment reaches an amount that meets demand.
[0013]
When the output expansion of the wind power generation facility is less than the set output, the storage battery is discharged to supplement the output and adjust the number of starting engines of the diesel power generation facility. And if the electric power produced by the said wind power generation equipment and the said diesel power generation equipment settles in the quantity suitable for a demand, the drive of the said storage battery will be stopped. For this reason, since the output power is kept constant by the rotational energy storage effect of the wind power generation facility and the action of the storage battery, the system frequency of the power generation system is hardly affected.
[0014]
The present invention combines a diesel power plant equipped with wind power installation and a plurality of the diesel engine, a further power generation system provided with a storage battery to absorb the output fluctuation due to wind power, per unit time of the wind power installation When the decreasing output power deviates from the first value, the battery is discharged from the storage battery to supplement the output, and the diesel engine is newly driven to increase the power generation amount of the diesel power generation facility. A power generation system that combines wind power generation and diesel power generation, characterized in that the amount of power supplied from the vehicle is reduced.
[0015]
In the power generation system combining the wind power generation and the diesel power generation, the first value is preferably an upper limit value at which the wind power generation facility can supply power independently without using the storage battery.
[0016]
In the power generation system combining the wind power generation and the diesel power generation, when the rate of change of the output decrease deviates from the first value, the rate of change of the output decrease is set to a second value that is larger than the first value. It is preferable to hold.
[0017]
Further, the present invention is a power generation system that combines a wind power generation facility and a diesel power generation facility including a plurality of diesel engines, and further includes a storage battery that absorbs output fluctuation due to wind power generation, and the output expansion of the wind power generation facility When the output is less than the set output even when the operation is performed, the battery is discharged from the storage battery to complement the output, the number of starting engines of the diesel power generation equipment is adjusted, and the wind power generation equipment and the diesel power generation equipment Provided is a power generation system combining wind power generation and diesel power generation, characterized in that the drive of the storage battery is stopped when the amount of power produced reaches an amount suitable for demand.
[0018]
Moreover, it is not necessary to enlarge the capacity | capacitance of a storage battery excessively by providing a thermal radiation heater in a wind power generation facility, filling a storage battery, further converting surplus electric power into heat, and discarding it in air | atmosphere. As a result, it is possible to extend the useful life and reduce the cost required for replacement of the storage battery (same as before, the price of the storage battery itself, construction costs, etc.).
[0019]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to FIG.
FIG. 1 is a diagram showing an overall outline of a power generation system combining wind power generation and diesel power generation according to the present invention. In the figure, reference numeral 1 denotes a wind power generation facility that uses a windmill, and 2 denotes a diesel power generation facility that uses a diesel engine.
[0020]
The wind power generation facility 1 is provided with a windmill 3, a storage battery 4, a heat radiating heater 5, and a wind power generation control device 6 that controls these devices (for the wind power generation facility 1, refer to Japanese Patent Laid-Open No. 9-324740, “Wind Wind”). See also “Generator”). In addition, the diesel power generation facility 2 is provided with a plurality of diesel engines 7 and a diesel power generation control device 8 that controls them.
[0021]
The wind turbine 3 employs a type that stabilizes the output by the rotational energy accumulation effect (flywheel effect) of the blades.
[0022]
The storage battery 4 and the heat dissipation heater 5 are connected to a power supply system 9 generated by the wind turbine 3. The power supply system 9 is provided with a converter 10 that temporarily converts the AC output generated by the windmill 3 into a DC output, and an inverter 11 that converts the converted DC output back into an AC output. Is connected between the converter 10 and the inverter 11 via a charger / discharger 12. On the other hand, the heat dissipation heater 5 is connected between the converter 10 and the inverter 11 via a rectifier 13.
[0023]
The wind power generation control device 6 and the diesel power generation control device 8 are connected by a communication line using the optical cable 14. Thus, the two power generation facilities do not necessarily have to be adjacent to each other in the same site, and there is no problem that they are constructed apart from each other. For example, the diesel power generation facility 2 can be constructed adjacent to an urban area, the wind power generation facility 1 can be constructed in an area far from the urban area such as a remote island, and both can be connected by an optical cable 14.
[0024]
The operation of the power generation system configured as described above will be described. In the following, the description will be made on the assumption that the storage battery 4 is charged.
[1. Peaceful time]
When the output is increased even if the output is suppressed by the pitch control of the wind turbine 3 in the wind power generation facility 1 with respect to the preset output (because the power consumed by each consumer is relatively small). Drives the radiating heater 5 and releases surplus power as thermal energy into the atmosphere. During this period, the diesel power generation facility 2 adjusts (decreases) the number of engines activated by the total amount of power demand, and if the power produced by the wind power generation facility 1 and the diesel power generation facility 2 reaches an amount that meets the demand, a radiator heater The driving of 5 is stopped.
[0025]
In addition, when the output is reduced even if the output is expanded by the pitch control of the wind turbine 3 with respect to the preset output (due to the relatively large amount of power consumed by each consumer), it is insufficient. The power supply is continued by supplementing the power of the minute from the storage battery 4. During this time, the number of engines activated in the diesel power generation facility 2 is adjusted (increased) by the total amount of power demand, and if the power produced by the wind power generation facility 1 and the diesel power generation facility 2 reaches an amount that meets the demand, the storage battery 4 Is stopped.
In the case of this operation mode, the output power is kept constant by the rotational energy storage effect of the windmill 3 and the action of the storage battery 4, so that the system frequency of the power generation system is hardly affected.
[0026]
[2. When the wind speed changes suddenly]
When the wind state changes and the wind speed changes suddenly, the rotational speed of the windmill 3 may drop rapidly. In this case, since the electric power obtained by the windmill 3 also decreases rapidly, this is detected and the necessary electric power is instantaneously discharged from the storage battery 4. Thereby, the output electric power of the wind power generation facility 1 does not fluctuate greatly.
[0027]
[3. When wind speed decays]
When the wind state gradually changes and the wind speed attenuates little by little, the pitch control of the wind turbine 3 is performed following this, and the output reduction of the electric power obtained by the wind turbine 3 is compensated together with the rotational energy accumulation effect. In this case, the rate of change in output reduction ( change in output power per unit time) is 5 kW / s (first value), and the power generation system minimizes fluctuations in the output of the diesel power generation equipment. To prevent disturbance.
[0028]
When the wind speed subsequently decays and the wind turbine 3 cannot maintain the output change rate at the first value, the output change rate is changed to 35 kW / s (second value), which is equivalent to the change rate of the first value. Insufficient power is instantaneously supplied from the storage battery 4 so as to be output power.
Furthermore, when the wind speed drops and the wind turbine 3 stops, or when an abnormality occurs in the wind turbine 3 and the output suddenly stops (trip), the power equivalent to the output power immediately before stopping is instantaneously supplied from the storage battery 4. . Thereby, electric power supply is continued without interruption, and stable electric power supply is performed toward each consumer.
[0029]
However, since there is a limit to the power supply from the storage battery 4, the supply amount from the storage battery 4 is gradually decreased thereafter, and the power generation amount of the newly started diesel engine 7 is increased, so that all of the startup states are When the amount of power generated by the diesel engine 7 reaches the total amount of power demand, the power supply from the storage battery 4 is stopped.
[0030]
If the wind speed starts to increase while the predetermined time has passed, the start-up of the diesel power generation facility 2 that has been prepared is canceled and the operation returns to normal operation.
[0031]
【The invention's effect】
As described above, according to the control method of the power generation system according to the present invention, the output change rate is determined by determining the first and second values (first value <second value, but less than or equal to the first value). If this is the case, it is possible to supply power without using a storage battery), and the output change rate is kept at the first value, and the output change rate deviates from the first value by suppressing the output fluctuation of the diesel power generation equipment. If this occurs, the output is supplemented from the storage battery while maintaining the second value, and when the output of the wind power generation facility is stopped, the output is complemented by discharging from the storage battery and the diesel power generation facility is driven. When the output generated by the battery is stabilized, the drive of the storage battery is stopped by reducing the drive frequency of the storage battery, so that the service life can be extended and various costs required for replacement of the storage battery can be reduced.
[0032]
According to the power generation system of the present invention, the storage battery is connected to the power supply system of the windmill via the charger / discharger, so that the storage of surplus power and the supplementation of power supply can be instantaneously performed. Can be implemented smoothly.
[0033]
Moreover, according to the power generation system of the present invention, the capacity of the storage battery is excessively large by providing a heat dissipation heater in the wind power generation facility, filling the storage battery, further converting surplus power into heat and discarding it in the atmosphere. Therefore, it is possible to reduce various costs required for installing the storage battery.
[0034]
[Brief description of the drawings]
FIG. 1 is a diagram showing an overall outline of a power generation system combining wind power generation and diesel power generation according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Wind power generation equipment 2 Diesel power generation equipment 3 Windmill 4 Storage battery 5 Heat radiation heater 6 Wind power generation control device 7 Diesel engine 8 Diesel power generation control device 9 Power supply system 10 Converter 11 Inverter 12 Charger / discharger 13 Rectifier 14 Optical cable

Claims (8)

風力発電設備と複数のディーゼル機関を備えたディーゼル発電設備とを組み合わせ、さらに風力発電による出力変動を吸収する蓄電池を備えた発電システムの制御方法であって、
前記風力発電設備の単位時間当たりに低下する出力電力の変化が第１の値を逸脱した場合は、前記蓄電池から放電して出力補完を行うとともに、新たに前記ディーゼル機関を駆動し、
該ディーゼル発電設備の発電量の増加とともに前記蓄電池からの電力供給量を低下させることを特徴とする風力発電とディーゼル発電とを組み合わせた発電システムの制御方法。A method for controlling a power generation system comprising a storage battery that combines wind power generation equipment and diesel power generation equipment equipped with a plurality of diesel engines, and further absorbs output fluctuation due to wind power generation,
When the change in the output power that decreases per unit time of the wind power generation facility deviates from the first value, the output is complemented by discharging from the storage battery, and the diesel engine is newly driven,
A control method for a power generation system that combines wind power generation and diesel power generation, wherein the power supply amount from the storage battery is decreased as the power generation amount of the diesel power generation facility increases. 前記第１の値は、前記風力発電設備が前記蓄電池を使わず単独で電力供給可能な上限値であることを特徴とする請求項１に記載の風力発電とディーゼル発電とを組み合わせた発電システムの制御方法。  2. The power generation system combining wind power generation and diesel power generation according to claim 1, wherein the first value is an upper limit value at which the wind power generation facility can supply power independently without using the storage battery. Control method. 前記出力低下の変化率が第１の値を逸脱した場合は、出力低下の変化率を第１の値より大である第２の値に保持することを特徴とする請求項１または請求項２に記載の風力発電とディーゼル発電とを組み合わせた発電システムの制御方法。  3. The output reduction rate is maintained at a second value that is larger than the first value when the output reduction rate has deviated from the first value. A control method of a power generation system combining wind power generation and diesel power generation described in 1. 風力発電設備と複数のディーゼル機関を備えたディーゼル発電設備とを組み合わせ、さらに風力発電による出力変動を吸収する蓄電池を備えた発電システムの制御方法であって、
前記風力発電設備の出力拡大を実施しても設定された出力に満たない場合に、前記蓄電池から放電して出力補完を行うとともに、前記ディーゼル発電設備の起動機関数を調整し、
前記風力発電設備と前記ディーゼル発電設備とによって生産される電力が需要に見合う量に落ち着けば前記蓄電池の駆動を停止することを特徴とする風力発電とディーゼル発電とを組み合わせた発電システムの制御方法。A method for controlling a power generation system comprising a storage battery that combines wind power generation equipment and diesel power generation equipment equipped with a plurality of diesel engines, and further absorbs output fluctuation due to wind power generation,
When the output expansion of the wind power generation facility is less than the set output, discharge from the storage battery and complement the output, and adjust the number of starting engines of the diesel power generation facility,
A method for controlling a power generation system that combines wind power generation and diesel power generation, wherein driving of the storage battery is stopped when power produced by the wind power generation facility and the diesel power generation facility reaches an amount that meets demand. 風力発電設備と複数のディーゼル機関を備えたディーゼル発電設備とを組み合わせ、さらに風力発電による出力変動を吸収する蓄電池を備えた発電システムであって、
前記風力発電設備の単位時間当たりに低下する出力電力の変化が第１の値を逸脱した場合は、前記蓄電池から放電して出力補完を行うとともに、新たに前記ディーゼル機関を駆動し、
該ディーゼル発電設備の発電量の増加とともに前記蓄電池からの電力供給量を低下させることを特徴とする風力発電とディーゼル発電とを組み合わせた発電システム。A power generation system comprising a storage battery that combines wind power generation equipment and diesel power generation equipment equipped with a plurality of diesel engines, and further absorbs output fluctuation due to wind power generation,
When the change in the output power that decreases per unit time of the wind power generation facility deviates from the first value, the output is complemented by discharging from the storage battery, and the diesel engine is newly driven,
A power generation system combining wind power generation and diesel power generation, characterized in that the power supply amount from the storage battery is reduced as the power generation amount of the diesel power generation facility increases. 前記第１の値は、前記風力発電設備が前記蓄電池を使わず単独で電力供給可能な上限値であることを特徴とする請求項５に記載の風力発電とディーゼル発電とを組み合わせた発電システム。  6. The power generation system according to claim 5, wherein the first value is an upper limit value at which the wind power generation facility can supply power independently without using the storage battery. 前記出力低下の変化率が第１の値を逸脱した場合は、出力低下の変化率を第１の値より大である第２の値に保持することを特徴とする請求項５または請求項６に記載の風力発電とディーゼル発電とを組み合わせた発電システム。  7. The output reduction rate is maintained at a second value that is greater than the first value when the output reduction rate has deviated from the first value. A power generation system combining wind power generation and diesel power generation described in 1. 風力発電設備と複数のディーゼル機関を備えたディーゼル発電設備とを組み合わせ、さらに風力発電による出力変動を吸収する蓄電池を備えた発電システムであって、
前記風力発電設備の出力拡大を実施しても設定された出力に満たない場合に、前記蓄電池から放電して出力補完を行うとともに、前記ディーゼル発電設備の起動機関数を調整し、
前記風力発電設備と前記ディーゼル発電設備とによって生産される電力が需要に見合う量に落ち着けば前記蓄電池の駆動を停止することを特徴とする風力発電とディーゼル発電とを組み合わせた発電システム。A power generation system comprising a storage battery that combines wind power generation equipment and diesel power generation equipment equipped with a plurality of diesel engines, and further absorbs output fluctuation due to wind power generation,
When the output expansion of the wind power generation facility is less than the set output, discharge from the storage battery and complement the output, and adjust the number of starting engines of the diesel power generation facility,
A power generation system that combines wind power generation and diesel power generation, wherein driving of the storage battery is stopped when the power produced by the wind power generation facility and the diesel power generation facility reaches an amount that meets demand.
JP2001124875A 2001-04-23 2001-04-23 Control method of power generation system combining wind power generation and diesel power generation, and power generation system combining wind power generation and diesel power generation Expired - Fee Related JP4475843B2 (en)

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