JP2003123778A - Power supply system and operation method thereof - Google Patents
Power supply system and operation method thereofInfo
- Publication number
- JP2003123778A JP2003123778A JP2001315377A JP2001315377A JP2003123778A JP 2003123778 A JP2003123778 A JP 2003123778A JP 2001315377 A JP2001315377 A JP 2001315377A JP 2001315377 A JP2001315377 A JP 2001315377A JP 2003123778 A JP2003123778 A JP 2003123778A
- Authority
- JP
- Japan
- Prior art keywords
- power
- power generation
- basic
- amount
- power supply
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/14—Combined heat and power generation [CHP]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Landscapes
- Fuel Cell (AREA)
- Control Of Eletrric Generators (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
(57)【要約】
【課題】 ハイブリッド発電システムを常に高効率で運
転できるような電源システム及びその運転方法を提供す
る。
【解決手段】 ＳＯＦＣの発電量と発電機Ｇの発電量の
合計は、最適化運転システムの指令により、これらで構
成されるハイブリッドシステムの発電効率が最高値にな
る発電量に制御されている。直流ラインには、バナジウ
ムレドックスフロー電池が結合されている。バナジウム
レドックスフロー電池は、最適化運転システムの指令を
受け、電力系統が必要とする電力量が基本電力を上回る
とき、給電制御を行って不足分の電力を直流ラインに放
出する。また、基本電力が、電力系統が必要とする電力
量を上回るとき、給電制御を行って余剰分の電力を直流
ラインから受け取って蓄電を行う。
(57) [Summary] [PROBLEMS] To provide a power supply system capable of always operating a hybrid power generation system with high efficiency and an operation method thereof. SOLUTION: The sum of the power generation amount of the SOFC and the power generation amount of the generator G is controlled by a command of an optimization operation system to a power generation amount at which the power generation efficiency of the hybrid system configured by these becomes the maximum value. A vanadium redox flow battery is coupled to the DC line. The vanadium redox flow battery receives a command from the optimized operation system and, when the amount of power required by the power system exceeds the basic power, performs power supply control and discharges insufficient power to the DC line. When the basic power exceeds the amount of power required by the power system, power supply control is performed, and surplus power is received from the DC line to store power.
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、加圧形固体酸化物
型燃料電池（本明細書では単に「ＳＯＦＣ」と称するこ
とがある）と、マイクロガスタービンによる発電とを組
み合わせた電源システム（本明細書では単に「ハイブリ
ッドシステム」と称することがある）及びその運転方法
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply system combining a pressurized solid oxide fuel cell (which may be simply referred to as "SOFC" in this specification) and power generation by a micro gas turbine. In the specification, it may be simply referred to as a "hybrid system") and its operating method.
【０００２】[0002]
【従来の技術】ＳＯＦＣとマイクロガスタービンを組み
合わせたハイブリッド発電システムは従来公知である。
図２にＳＯＦＣを単独で運転した場合の出力に対する発
電効率を示す。図２から分かるように、発電効率が最大
となる点は、定格出力（100％出力）に対して低い値に
留まっている。2. Description of the Related Art A hybrid power generation system combining an SOFC and a micro gas turbine is conventionally known.
FIG. 2 shows the power generation efficiency with respect to the output when the SOFC is operated alone. As can be seen from Fig. 2, the point at which the power generation efficiency becomes maximum remains at a low value with respect to the rated output (100% output).
【０００３】これに対し、ＳＯＦＣとマイクロガスター
ビンを組み合わせたハイブリッド発電システムにおける
出力に対する発電効率を図３に示す。図３から分かるよ
うに、このようなハイブリッド発電システムにおいて
は、発電効率が最高となる点は定格出力よりわずかに低
い出力の場合である。よって、定格出力に近い大きな出
力で運転した場合でも高い効率が得られる。On the other hand, FIG. 3 shows the power generation efficiency with respect to the output in the hybrid power generation system in which the SOFC and the micro gas turbine are combined. As can be seen from FIG. 3, in such a hybrid power generation system, the point where the power generation efficiency becomes the highest is when the output is slightly lower than the rated output. Therefore, high efficiency can be obtained even when operating at a large output close to the rated output.
【０００４】[0004]
【発明が解決しようとする課題】前述したようなハイブ
リッド発電システムにおいては、前述のように定格出力
に近い大きな出力で常時運転を行うことが発電効率の面
から好ましい。ところが、周知のように、電力需要は昼
間と夜間では大きな差があり、夜間では必要電力量が低
下する。これに対応するためには、発電量を落とさなけ
ればならず、発電効率が低下するという問題点がある。
また、設備としては昼間の電力需要を賄うだけの容量を
持たなければならず、平均需要電力よりも大型の設備が
必要であるという問題点もある。In the hybrid power generation system as described above, it is preferable from the viewpoint of power generation efficiency to always operate at a large output close to the rated output as described above. However, as is well known, there is a large difference in power demand between daytime and nighttime, and the required power amount decreases at nighttime. In order to deal with this, it is necessary to reduce the amount of power generation, and there is a problem in that power generation efficiency decreases.
In addition, there is a problem that the equipment must have a capacity to cover the power demand during the day, and that the equipment larger than the average power demand is required.
【０００５】本発明はこのような事情に鑑みてなされた
もので、前述のようなハイブリッド発電システムを常に
高効率で運転できるような電源システム及びその運転方
法を提供することを課題とする。The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a power supply system and an operating method thereof that can always operate the hybrid power generation system as described above with high efficiency.
【０００６】[0006]
【課題を解決するための手段】前記課題を解決するため
の第１の手段は、加圧形固体酸化物型燃料電池（ＳＯＦ
Ｃ）と、発電機が接続されたマイクロガスタービンと、
レドックスフロー電池を有してなり、前記ＳＯＦＣと発
電機との出力を加えたものが基本電力として電力系統に
出力されると共に、レドックスフロー電池は、電力系統
が要求する電力量が前記基本電力より大きいとき、両者
の差分に当たる電力を電力系統に供給し、電力系統が要
求する電力量が前記基本電力より小さいとき、両者の差
分に当たる電力量を蓄電する機能を有することを特徴と
する電源システム（請求項１）である。[Means for Solving the Problems] A first means for solving the above problems is a pressurized solid oxide fuel cell (SOF).
C) and a micro gas turbine to which a generator is connected,
A redox flow battery is provided, and the output of the SOFC and the generator is added to the power system as basic power, and the redox flow battery has a power amount required by the power system that is higher than the basic power. A power supply system having a function of supplying electric power corresponding to the difference between the two to the electric power system when the electric power is large, and storing the electric power corresponding to the difference between the two when the electric power required by the electric power system is smaller than the basic electric power ( Claim 1).
【０００７】本手段によれば、基本電力の値を常に定格
値近くの効率の高い領域に保ち、需要電力量が基本電力
より少ない夜間等においては、余った電力でレドックス
フロー電池を充電し、需要電力量が基本電力を超えた場
合には、不足分をレドックスフロー電池から供給するこ
とができる。よって、前記ハイブリッド発電システムの
発電効率を高効率に保つと共に、全体の設備の規模を平
均需要電力に見合ったものとすることができる。According to this means, the value of the basic electric power is always kept in a highly efficient region near the rated value, and the redox flow battery is charged with the surplus electric power at night when the demand electric energy is smaller than the basic electric power, When the amount of power demand exceeds the basic power, the shortage can be supplied from the redox flow battery. Therefore, it is possible to keep the power generation efficiency of the hybrid power generation system high and to make the scale of the entire equipment commensurate with the average power demand.
【０００８】前記課題を解決するための第２の手段は、
前記第１の手段を運転する方法であって、前記基本電力
を、前記ＳＯＦＣによる発電とマイクロガスタービンに
よる発電との合計の発電効率がほぼ最高となる電力量に
保ちながら運転を行うことを特徴とするもの（請求項
２）である。A second means for solving the above problems is
A method of operating the first means, characterized in that the basic electric power is operated while maintaining a power amount at which a total power generation efficiency of power generation by the SOFC and power generation by a micro gas turbine is substantially maximum. (Claim 2).
【０００９】本手段においては、たとえ需要電力量が定
格出力を超えるような場合でも、前記ハイブリッドシス
テムの出力を定格まで上げず、その発電効率がほぼ最高
となる電力量（最高発電効率の97％以上の発電効率を有
する範囲）に保ちながら運転を続け、不足分の電力をレ
ドックスフロー電池から供給する。よって、前記ハイブ
リッドシステムの発電効率を確実に高効率に保つことが
できる。In this means, even if the demanded power amount exceeds the rated output, the output amount of the hybrid system is not raised to the rated value, and the power generation efficiency becomes almost maximum (97% of the maximum power generation efficiency). The operation is continued while maintaining the above power generation efficiency), and the shortage of electric power is supplied from the redox flow battery. Therefore, the power generation efficiency of the hybrid system can be reliably maintained at high efficiency.
【００１０】[0010]
【発明の実施の形態】以下、本発明の実施の形態の例
を、図を用いて説明する。図１は、本発明の実施の形態
の１例である電源システムの概要図である。マイクロガ
スタービンに直結された圧縮機には、ＳＯＦＣへの燃焼
空気が供給され、圧縮空気は、熱交換機で加熱された後
ＳＯＦＣに送られ、同じく熱交換機を通って加熱された
燃料と混合されて発電を行う。ＳＯＦＣの直流出力はＤ
／Ｄコンバータにより高電圧の直流電圧に変換され、直
流ラインに入力される。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an example of an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic diagram of a power supply system that is an example of an embodiment of the present invention. Combustion air to the SOFC is supplied to the compressor directly connected to the micro gas turbine, and the compressed air is sent to the SOFC after being heated by the heat exchanger and mixed with the fuel that is also heated through the heat exchanger. To generate electricity. DC output of SOFC is D
It is converted into a high-voltage DC voltage by the / D converter and input to the DC line.
【００１１】ＳＯＦＣの約850℃の排ガスは、マイクロ
ガスタービンに送られ、マイクロガスタービンを駆動す
る。マイクロガスタービンには発電機Ｇが結合されてお
り、これにより発電された交流電力はＡ／Ｄコンバータ
により直流に変換され、直流ラインに入力される。そし
て、マイクロガスタービンより排出された約250℃の排
ガスは、熱交換機で放熱を行い、続いて熱回収／冷温熱
供給装置で熱媒体を加熱した後に排気される。Exhaust gas of SOFC at about 850 ° C. is sent to a micro gas turbine to drive the micro gas turbine. A generator G is coupled to the micro gas turbine, and the AC power generated by the generator G is converted to DC by the A / D converter and input to the DC line. Exhaust gas of about 250 ° C. discharged from the micro gas turbine is radiated by a heat exchanger, and subsequently, a heat medium is heated by a heat recovery / cold heat supply device and then exhausted.
【００１２】ＳＯＦＣの発電量と発電機Ｇの発電量の合
計は、最適化運転システムの指令により、これらで構成
されるハイブリッドシステムの発電効率が最高値になる
発電量に制御されている。即ち、ＳＯＦＣの発電量と発
電機Ｇの発電量の合計は、常に一定に保たれている（こ
れを「基本電力」という）。The sum of the power generation amount of the SOFC and the power generation amount of the generator G is controlled by the command of the optimizing operation system so that the power generation efficiency of the hybrid system composed of them becomes the maximum value. That is, the total of the SOFC power generation amount and the power generation amount of the generator G is always kept constant (this is referred to as "basic power").
【００１３】直流ラインには、バナジウムレドックスフ
ロー電池が結合されている。バナジウムレドックスフロ
ー電池は、最適化運転システムの指令を受け、電力系統
が必要とする電力量が基本電力を上回るとき、給電制御
を行って不足分の電力を直流ラインに放出する。また、
基本電力が、電力系統が必要とする電力量を上回ると
き、給電制御を行って余剰分の電力を直流ラインから受
け取って蓄電を行う。A vanadium redox flow battery is connected to the DC line. The vanadium redox flow battery receives a command from the optimized operation system and, when the amount of electric power required by the electric power system exceeds the basic electric power, performs power supply control and discharges the insufficient electric power to the DC line. Also,
When the basic power exceeds the amount of power required by the power system, power supply control is performed and excess power is received from the DC line to store electricity.
【００１４】双方向インバータは、直流ラインの電力を
電力系統に同期した交流に変換して電力系統に供給す
る。熱回収／冷温熱供給装置から供給される熱媒体は、
バナジウムレドックスフロー電池の電解液タンク内の電
解液を加熱すると共に、外部に熱源として供給される。The bidirectional inverter converts the electric power of the DC line into AC alternating with the electric power system and supplies it to the electric power system. The heat medium supplied from the heat recovery / cold heat supply device is
The electrolytic solution in the electrolytic solution tank of the vanadium redox flow battery is heated and supplied to the outside as a heat source.
【００１５】最適化運転システムは、本明細書には記載
されていない高度の最適運転のための制御を行うが、最
低、前述のようにバナジウムレドックスフロー電池の放
電・蓄電制御を行う。The optimized operation system performs control for a high degree of optimum operation which is not described in the present specification, but at least performs discharge / storage control of the vanadium redox flow battery as described above.
【００１６】[0016]
【発明の効果】以上説明したように、本発明によれば、
前述のようなハイブリッド発電システムを常に高効率で
運転できるような電源システム及びその運転方法を提供
することができる。さらに、従来に比して設備を小型化
することができる。As described above, according to the present invention,
It is possible to provide a power supply system and an operating method thereof that can always operate the hybrid power generation system as described above with high efficiency. Further, the equipment can be downsized as compared with the conventional one.
【図１】本発明の実施の形態の１例である電源システム
の概要図である。FIG. 1 is a schematic diagram of a power supply system that is an example of an embodiment of the present invention.
【図２】ＳＯＦＣを単独で運転した場合の出力に対する
発電効率を示す図である。FIG. 2 is a diagram showing power generation efficiency with respect to output when an SOFC is operated alone.
【図３】マイクロガスタービンとＳＯＦＣを組み合わせ
たハイブリッド発電システムにおける出力に対する発電
効率を示す図である。FIG. 3 is a diagram showing power generation efficiency with respect to output in a hybrid power generation system in which a micro gas turbine and SOFC are combined.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｆ０２Ｃ 6/18 Ｆ０２Ｃ 6/18 Ｚ Ｈ０１Ｍ 8/04 Ｈ０１Ｍ 8/04 Ｐ 8/12 8/12 Ｈ０２Ｐ 9/04 Ｈ０２Ｐ 9/04 Ｆ (72)発明者 坂本 賢美 東京都千代田区丸の内一丁目１番２号 日 本鋼管株式会社内 (72)発明者 福田 聖二 東京都千代田区丸の内一丁目１番２号 日 本鋼管株式会社内 Ｆターム(参考） 3G081 BA11 BA20 DA27 5H026 AA06 5H027 AA06 AA10 DD02 DD03 5H590 AA02 AA03 CA08 CA26 CA30 CD01 CD03 CE01 CE05 EA07 EB04 GA06 HA06 ─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 7 Identification code FI theme code (reference) F02C 6/18 F02C 6/18 Z H01M 8/04 H01M 8/04 P 8/12 8/12 H02P 9 / 04 H02P 9/04 F (72) Inventor Kenmi Sakamoto Marunouchi 1-2-2 Maruuchi, Chiyoda-ku, Tokyo Inside Steel Pipe Co., Ltd. (72) Seiji Fukuda 1-2 1-2 Marunouchi Chiyoda-ku, Tokyo Sun F-Term of this steel pipe company (reference) 3G081 BA11 BA20 DA27 5H026 AA06 5H027 AA06 AA10 DD02 DD03 5H590 AA02 AA03 CA08 CA26 CA30 CD01 CD03 CE01 CE05 EA07 EB04 GA06 HA06
Claims (2)
Ｃ）と、発電機が接続されたマイクロガスタービンと、
レドックスフロー電池を有してなり、前記ＳＯＦＣと発
電機との出力を加えたものが基本電力として電力系統に
出力されると共に、レドックスフロー電池は、電力系統
が要求する電力量が前記基本電力より大きいとき、両者
の差分に当たる電力を電力系統に供給し、電力系統が要
求する電力量が前記基本電力より小さいとき、両者の差
分に当たる電力量を蓄電する機能を有することを特徴と
する電源システム。1. A pressurized solid oxide fuel cell (SOF)
C) and a micro gas turbine to which a generator is connected,
A redox flow battery is provided, and the output of the SOFC and the generator is added to the power system as basic power, and the redox flow battery has a power amount required by the power system that is higher than the basic power. A power supply system having a function of supplying a power corresponding to a difference between the two to the power system when the power is large, and storing a power corresponding to the difference between the two when the power required by the power system is smaller than the basic power.
法であって、前記基本電力を、ほぼ、前記ＳＯＦＣによ
る発電とマイクロガスタービンによる発電との合計の発
電効率が最高となる電力量に保ちながら運転を行うこと
を特徴とする電源システムの運転方法。2. The method of operating a power supply system according to claim 1, wherein the basic electric power is set to a power amount at which the total power generation efficiency of the power generation by the SOFC and the power generation by the micro gas turbine becomes maximum. A method for operating a power supply system, which is characterized by performing operation while maintaining the same.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001315377A JP2003123778A (en) | 2001-10-12 | 2001-10-12 | Power supply system and operation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001315377A JP2003123778A (en) | 2001-10-12 | 2001-10-12 | Power supply system and operation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003123778A true JP2003123778A (en) | 2003-04-25 |
Family
ID=19133555
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001315377A Pending JP2003123778A (en) | 2001-10-12 | 2001-10-12 | Power supply system and operation method thereof |
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| Country | Link |
|---|---|
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006080471A1 (en) * | 2005-01-27 | 2006-08-03 | Toyota Jidosha Kabushiki Kaisha | Power supply device |
| JP2007087829A (en) * | 2005-09-22 | 2007-04-05 | Sumitomo Electric Ind Ltd | Redox flow battery system |
| JP2009541141A (en) * | 2006-06-27 | 2009-11-26 | ターボメカ | Aircraft power generation system using fuel cells |
| US8043736B2 (en) | 2006-01-10 | 2011-10-25 | Honeywell International Inc. | Power generator having multiple layers of fuel cells |
| CN102354764A (en) * | 2011-08-24 | 2012-02-15 | 中国东方电气集团有限公司 | Energy supply system and control method thereof |
| US8404395B2 (en) | 2005-07-12 | 2013-03-26 | Honeywell International Inc. | Ring of fuel cells with a hydrogen generator |
-
2001
- 2001-10-12 JP JP2001315377A patent/JP2003123778A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006080471A1 (en) * | 2005-01-27 | 2006-08-03 | Toyota Jidosha Kabushiki Kaisha | Power supply device |
| US8404395B2 (en) | 2005-07-12 | 2013-03-26 | Honeywell International Inc. | Ring of fuel cells with a hydrogen generator |
| JP2007087829A (en) * | 2005-09-22 | 2007-04-05 | Sumitomo Electric Ind Ltd | Redox flow battery system |
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