JP4752859B2 - Ship propulsion system - Google Patents

Ship propulsion system Download PDF

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JP4752859B2
JP4752859B2 JP2008104641A JP2008104641A JP4752859B2 JP 4752859 B2 JP4752859 B2 JP 4752859B2 JP 2008104641 A JP2008104641 A JP 2008104641A JP 2008104641 A JP2008104641 A JP 2008104641A JP 4752859 B2 JP4752859 B2 JP 4752859B2
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generator
circuit breaker
shaft
frequency converter
frequency
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JP2009255637A (en
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知幸 岩崎
守男 近藤
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Mitsui Engineering and Shipbuilding Co Ltd
Mitsui E&S Holdings Co Ltd
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Mitsui Engineering and Shipbuilding Co Ltd
Mitsui E&S Holdings Co 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

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Description

本発明は船舶の省エネルギー化が可能な船舶推進システムに関する。   The present invention relates to a ship propulsion system capable of saving energy of a ship.

通常、船舶推進システムにおける省エネルギーの方法として、主機の排ガスをエコノマイザーに供給して蒸気を発生させタービンを駆動し、発電や推進加勢する方法や、主機の排ガスでパワータービン／発電機を駆動し発電する方法、あるいは主機の過給機に発電機を取付け発電する方法等が提案されている。しかし、このような方法は、設置スペースやメンテナンスコストの問題から一般的に普及するに至っていない。   Usually, as an energy-saving method in ship propulsion systems, the main engine exhaust gas is supplied to the economizer to generate steam to drive the turbine to generate power and propulsion, or the main engine exhaust gas to drive the power turbine / generator. A method of generating electricity or a method of generating electricity by attaching a generator to a supercharger of a main engine has been proposed. However, such a method has not generally spread due to problems of installation space and maintenance cost.

図６を参照して従来の船舶推進システムを説明すると、図に示すように主機１の過給機４に第１発電電動機５ａを設置し、この第１発電電動機５ａと推進軸３に減速機６を介して設置された第２発電電動機１０とを電気的に接続している。主機１が低負荷でプロペラ２を回転するときは第２発電電動機１０で発電した電力で第１発電電動機５ａを駆動し過給機４を加勢し、主機１が定格運転でプロペラ２を回転する時は第１発電電動機５ａで発電した電力で第２発電電動機１０を駆動し、主機１を加勢するものである（特許文献１参照）が、主機１の負荷変動に対し過給機４の回転数の応答にずれが生じるため、減速機６に大きな負荷がかかる場合があり、信頼性が低下することになる。また、一般に過給機回転数は数万回転で運転され、主機回転数は数十回転の低速度で運転されるため、回転数を合わせるためには多段の減速機が必要となり、設置スペースやメンテナンスコストの増大を招き、信頼性が低下することになる。 A conventional marine vessel propulsion system will be described with reference to FIG. 6. As shown in FIG. 6 is electrically connected to the second generator motor 10 installed through the connector 6. When the main machine 1 rotates the propeller 2 with a low load, the first generator motor 5a is driven by the power generated by the second generator motor 10 to energize the supercharger 4, and the main machine 1 rotates the propeller 2 at rated operation. In some cases, the second generator motor 10 is driven by the electric power generated by the first generator motor 5a to energize the main engine 1 (see Patent Document 1). Since the response of the number is shifted, a large load may be applied to the speed reducer 6 and the reliability is lowered. In general, the turbocharger is operated at several tens of thousands of revolutions and the main engine is operated at a low speed of several tens of revolutions. Therefore, a multistage reduction gear is required to match the number of revolutions. Maintenance costs increase and reliability decreases.

また、図７を参照して従来の他の船舶推進システムを説明すると、排ガスエコノマイザー７で発生した余剰蒸気で推進加勢タービン９を駆動し、減速機６を介してプロペラ２へ推進力を加勢している（特許文献２参照）。なお、４は過給機、５ｂは発電機、８は蒸気タービンである。   Further, another conventional ship propulsion system will be described with reference to FIG. 7. The propulsion boosting turbine 9 is driven by surplus steam generated by the exhaust gas economizer 7 and the propulsion force is boosted to the propeller 2 via the speed reducer 6. (See Patent Document 2). In addition, 4 is a supercharger, 5b is a generator, 8 is a steam turbine.

図７に示すような船舶推進システムにおいて、主機１の負荷変動時には、排ガスエコノマイザー７の発生蒸気量の細かな制御は困難であり、推進加勢タービン９の回転数を主機１の所望する回転数に追従させることは難しく、減速機６に大きな負荷がかかる場合があり、信頼性が低下することになる。また、主機１の回転数は数十回転の低速度で運転されるため、回転数を合わせるためには多段の減速機が必要となり、設置スペースやメンテナンスコストの増大を招くことになる。
特公昭６３−５５６５号公報 特公昭６１−５５６０２号公報 In the ship propulsion system as shown in FIG. 7, it is difficult to finely control the amount of steam generated by the exhaust gas economizer 7 when the load on the main engine 1 fluctuates. It is difficult to follow the above, and there is a case where a large load is applied to the speed reducer 6 and the reliability is lowered. Moreover, since the rotation speed of the main machine 1 is operated at a low speed of several tens of rotations, a multi-stage reduction gear is required to match the rotation speed, resulting in an increase in installation space and maintenance cost.
Japanese Examined Patent Publication No. 63-5565 Japanese Patent Publication No. 61-55602

本発明は上記事情に鑑みてなされたもので、その課題は最適な機器構成で省エネルギー化が可能でかつ効率も高く、様々な船舶の運転状況にも対応可能な船舶推進システムを提供することにある。   The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a ship propulsion system that can save energy with an optimum equipment configuration, has high efficiency, and can cope with various ship operating conditions. is there.

上記課題を達成するために、請求項１記載の発明は、過給機付き主機とプロペラを推進軸で連結し、当該推進軸に軸駆動発電機を設け、前記軸駆動発電機に接続された周波数変換装置を備えた船舶推進システムにおいて、前記主機の過給機に直結されて余剰排気エネルギーを回収して発電する高速発電機と、前記周波数変換装置と船内電源系統との間を接続する第１の遮断器と、前記高速発電機を前記周波数変換装置および前記第１の遮断器の接続部に接続する第２の遮断器とを備え、前記軸駆動発電機を推進電動機として使用する場合、前記第１の遮断器を開にするとともに前記第２の遮断器を閉にして前記高速発電機で発電した電力を前記第２の遮断器を経て前記周波数変換装置で前記主機の回転周波数に変換して前記軸駆動発電機に供給し、前記軸駆動発電機を発電機として使用する場合、前記第１の遮断器を閉にするとともに前記第２の遮断器を開にして前記軸駆動発電機で発電した電力を前記周波数変換装置で船内電源周波数に変換して前記船内電源系統に供給することを特徴とする。 To achieve the above object, a first aspect of the present invention, a supercharged main engine propeller connected by propeller shaft, the shaft drive generator provided in the propeller shaft, which is connected to the shaft drive generator In a marine vessel propulsion system provided with a frequency converter, a high-speed generator that is directly connected to the supercharger of the main engine and collects surplus exhaust energy to generate power, and a connection between the frequency converter and the inboard power system A first circuit breaker and a second circuit breaker that connects the high-speed generator to the connection portion of the frequency converter and the first circuit breaker, and the shaft-driven generator is used as a propulsion motor, The first circuit breaker is opened and the second circuit breaker is closed, and the electric power generated by the high-speed generator is converted to the rotation frequency of the main engine by the frequency converter through the second circuit breaker. To the shaft drive generator When the shaft-driven generator is used as a generator, the frequency converter converts the electric power generated by the shaft-driven generator with the first circuit breaker closed and the second circuit breaker opened. And converting to an inboard power supply frequency and supplying to the inboard power supply system .

請求項２記載の発明は、過給機付き主機とプロペラを推進軸で連結し、当該推進軸に軸駆動発電機を設け、前記軸駆動発電機に接続された周波数変換装置を備えた船舶推進システムにおいて、前記主機の過給機に直結されて余剰排気エネルギーを回収して発電する高速発電機と、前記周波数変換装置と船内電源系統とを接続する第１の遮断器と、前記軸駆動発電装置と前記周波数変換装置との間を接続する第３の遮断器と、前記高速発電機を前記周波数変換装置の前記第１の遮断器側の接点あるいは前記周波数変換装置の前記第３の遮断器側の接点に接続する切替器とを備え、前記高速発電機で発生した電力を前記船内電源系統に供給する場合、前記第３の遮断器を開、前記第１の遮断器を閉、前記切替器を前記第３の遮断器側の接点に接続して前記高速発電機で発電した電力を前記切替器を経て前記周波数変換装置で前記船内電源系統の周波数に変換して前記船内電源系統に供給し、前記軸駆動発電機を推進電動機として使用する場合、前記第１の遮断器を開、前記第３の遮断器を閉、前記切替器を前記第１の遮断器側の接点に接続して前記高速発電機で発電した電力を前記切替器を経て前記周波数変換装置で前記主機の回転周波数に変換して前記軸駆動発電機に供給することを特徴とする。 According to a second aspect of the present invention, a marine vessel propulsion including a main engine with a supercharger and a propeller connected by a propulsion shaft, a shaft drive generator provided on the propulsion shaft, and a frequency converter connected to the shaft drive generator. In the system, a high-speed generator that is directly connected to the supercharger of the main engine and collects surplus exhaust energy to generate electric power, a first circuit breaker that connects the frequency converter and the inboard power supply system, and the shaft-driven power generation A third circuit breaker for connecting the device and the frequency converter, and the high-speed generator connected to the contact on the first circuit breaker side of the frequency converter or the third circuit breaker of the frequency converter. A switching device connected to a contact on the side, and when the power generated by the high-speed generator is supplied to the inboard power system, the third circuit breaker is opened, the first circuit breaker is closed, and the switching Device is connected to the contact on the third circuit breaker side When the electric power generated by the high-speed generator is converted to the frequency of the inboard power system by the frequency converter through the switch and supplied to the inboard power system, and the shaft drive generator is used as a propulsion motor The first circuit breaker is opened, the third circuit breaker is closed, the switch is connected to a contact on the first circuit breaker side, and the electric power generated by the high-speed generator is passed through the switch. The frequency converter converts the rotational frequency of the main engine to supply to the shaft-driven generator .

本発明によれば、過給機に直結した発電機で発電した電力を周波数変換装置で主機の所望する周波数に即時変換して、軸駆動発電機を電動機として推進加勢できるので、主機の負荷変動時も推進電動機に大きな負荷がかかることがなく信頼性が向上する。また、回転数を合わせるための多段の減速機を必要とせず、機器設置スペースの削減、機器配置の自由度向上、及び貨物等の積載量の増加と共にメンテナンスコストの低減が可能となる。さらに、軸駆動発電機が故障して船内に電力を供給できなくなった時は、過給機に直結した発電機で発電した電力を周波数変換装置を介して船内電源周波数に即時変換して、船内電源系統に供給することが可能となるので、システムの冗長性が向上する。よって、最適な機器構成でエネルギー効率が高く、船舶の様々な運転状況に対応可能な船舶推進システムを提供することができる。   According to the present invention, the power generated by the generator directly connected to the supercharger can be immediately converted to the frequency desired by the main engine by the frequency converter, and the shaft-driven generator can be propelled and added as an electric motor. Even when the load is not applied to the propulsion motor, the reliability is improved. In addition, a multistage reduction gear for adjusting the number of rotations is not required, so that the installation cost can be reduced, the degree of freedom of equipment arrangement can be improved, and the load of cargo and the like can be increased and the maintenance cost can be reduced. In addition, when the shaft-driven generator breaks down and power cannot be supplied to the ship, the power generated by the generator directly connected to the turbocharger is immediately converted to the ship power frequency via the frequency converter. Since the power can be supplied to the power supply system, the redundancy of the system is improved. Therefore, it is possible to provide a ship propulsion system that is highly energy efficient with an optimum device configuration and that can cope with various operating conditions of the ship.

以下、本発明の最良の実施形態を、図を参照して説明する。
図１は、本発明の第１実施形態の構成図であり、インラインタイプの軸駆動発電システムに適用した例である。 DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the best embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a configuration diagram of a first embodiment of the present invention, which is an example applied to an inline-type shaft drive power generation system.

図１に示すように、本実施形態は、主機１とプロペラ２は推進軸３により連結され、推進軸３には軸駆動発電機１１ａが設置されている。主機１には主機排ガスで駆動する過給機４が設置され、過給機４には高速発電機１６が直結されている。高速発電機１６は遮断器１４ｂ，１４ａを介して船内電源系統１５に接続されている。軸駆動発電機１１ａは周波数変換装置１２，遮断器１４ａを介して船内電源系統１５に接続されている。同期調相機１３は軸駆動発電機１１ａの出力電圧と周波数を調整する。 As shown in FIG. 1 , in the present embodiment, the main machine 1 and the propeller 2 are connected by a propulsion shaft 3, and a shaft drive generator 11 a is installed on the propulsion shaft 3. The main engine 1 is provided with a supercharger 4 driven by main engine exhaust gas, and a high speed generator 16 is directly connected to the supercharger 4. The high speed generator 16 is connected to the inboard power supply system 15 through the circuit breakers 14b and 14a. The shaft drive generator 11a is connected to the inboard power supply system 15 via the frequency converter 12 and the circuit breaker 14a. The synchronous phase adjuster 13 adjusts the output voltage and frequency of the shaft drive generator 11a.

次に、本実施形態の作用について説明すると、軸駆動発電機１１ａを発電機として使用する場合は、発電電力を周波数変換装置１２で船内電源周波数に変換し、遮断器１４ａを閉、遮断器１４ｂを開とし、船内電源系統１５に接続する。また、軸駆動発電機１１ａを推進電動機として駆動し主機１を推進加勢する場合は、遮断器１４ａを開、遮断器１４ｂを閉とし、過給機４に直結した高速発電機１６で発電した電力を周波数変換装置１２を介して主機１の回転周波数に変換して給電する。   Next, the operation of the present embodiment will be described. When the shaft-driven generator 11a is used as a generator, the generated power is converted into an inboard power supply frequency by the frequency converter 12, the circuit breaker 14a is closed, and the circuit breaker 14b is closed. Is opened and connected to the inboard power supply system 15. Further, when the shaft drive generator 11a is driven as a propulsion motor and the main machine 1 is propelled and energized, the circuit breaker 14a is opened, the circuit breaker 14b is closed, and the power generated by the high speed generator 16 directly connected to the turbocharger 4 Is converted into the rotational frequency of the main machine 1 via the frequency converter 12 and supplied with power.

本実施形態は、上記のように構成されているので、過給機４に直結した発電機１６で発電した電力を周波数変換装置１２で主機１の所望する周波数に即時変換して推進加勢できる。従って、主機１の負荷変動時も推進電動機に大きな負荷がかかることがなく信頼性が向上する。また、回転数を合わせるための多段の減速機を必要とせず、機器設置スペースの削減並びに機器配置の自由度が向上し、さらに貨物等の積載量の増加と共にメンテナンスコストの低減が可能となる。   Since the present embodiment is configured as described above, the power generated by the generator 16 directly connected to the supercharger 4 can be immediately converted to the frequency desired by the main engine 1 by the frequency converter 12 and propulsion-assisted. Therefore, even when the load of the main engine 1 is changed, a large load is not applied to the propulsion motor, and the reliability is improved. In addition, a multistage reduction gear for adjusting the number of rotations is not required, the equipment installation space is reduced and the degree of freedom of equipment arrangement is improved, and the maintenance cost can be reduced along with the increase in the load of cargo and the like.

次に、本実施形態の変形例を図２ないし図４について説明する。
図２は図１の第１実施形態の第１変形例であり、オーバーハングタイプの軸駆動発電システムに適用した例である。すなわち、本変形例では主機１とプロペラ２は推進軸３により連結し、主機１の軸端に軸駆動発電機１１ｂを設置し、周波数変換装置１２を介し遮断器１４ａを経て船内電源系統１５に接続されている。主機１には主機排ガスで駆動する過給機４が設置され、過給機４には高速発電機１６が直結されている。高速発電機１６は遮断器１４ｂ，１４ａを経て船内電源系統１５に接続されている。
この第１実施形態の第１変形例において、高速発電機１６で発電した電力で軸駆動発電機１１ｂを推進加勢する場合には、遮断器１４ｂを閉、遮断器１４ａを開にして高速発電機１６で発電した電力を遮断器１４ｂを経て周波数変換装置１２で所望する周波数に即時変換して軸駆動発電機１１ｂに供給し推進加勢する。同期調相機１３は軸駆動発電機１１ｂの出力電圧と周波数を調整する。 Next, modified examples of the present embodiment will be described with reference to FIGS.
FIG. 2 is a first modification of the first embodiment of FIG. 1 and is an example applied to an overhang type shaft drive power generation system. That is, in this modification, the main machine 1 and the propeller 2 are connected by the propulsion shaft 3, the shaft drive generator 11 b is installed at the shaft end of the main machine 1, and connected to the inboard power system 15 via the frequency converter 12 through the circuit breaker 14 a. It is connected. The main engine 1 is provided with a supercharger 4 driven by main engine exhaust gas, and a high speed generator 16 is directly connected to the supercharger 4 . The high speed generator 16 is connected to the inboard power supply system 15 through the circuit breakers 14b and 14a.
In the first modification of the first embodiment, when the shaft-driven generator 11b is propelled and energized with the electric power generated by the high-speed generator 16, the breaker 14b is closed and the breaker 14a is opened, so that the high-speed generator the electric power generated by the 16 breaker 14b menstrual immediately converted to Kase promote supplies to the shaft driving the generator 11 b in the desired frequency by the frequency converter 12. The synchronous phase adjuster 13 adjusts the output voltage and frequency of the shaft drive generator 11b.

図３は第１実施形態の第２変形例であり、ステップアップタイプの軸駆動発電システムに適用した例である。すなわち、本変形例では主機１とプロペラ２の間の推進軸３に設けたステップアップギヤー１７を介して軸駆動発電機１１ｃを設置している。主機１には主機排ガスで駆動する過給機４が設置され、過給機４には高速発電機１６が直結されている。高速発電機１６は遮断器１４ｂ，１４ａを経て船内電源系統１５に接続されている。
この第１実施形態の第２変形例において、高速発電機１６で発電した電力で軸駆動発電機１１ｃを推進加勢する場合には、遮断器１４ｂを閉、遮断器１４ａを開にして高速発電機１６で発電した電力を遮断器１４ｂを経て周波数変換装置１２で所望する周波数に即時変換して軸駆動発電機１１ｃに供給し推進加勢する。同期調相機１３は軸駆動発電機１１ｃの出力電圧と周波数を調整する。 FIG. 3 shows a second modification of the first embodiment, which is an example applied to a step-up type shaft drive power generation system. That is, in this modification, the shaft drive generator 11 c is installed via the step-up gear 17 provided on the propulsion shaft 3 between the main machine 1 and the propeller 2. The main engine 1 is provided with a supercharger 4 driven by main engine exhaust gas, and a high speed generator 16 is directly connected to the supercharger 4 . The high speed generator 16 is connected to the inboard power supply system 15 through the circuit breakers 14b and 14a.
In the second modification of the first embodiment, when the shaft-driven generator 11c is propelled and energized with the electric power generated by the high-speed generator 16, the breaker 14b is closed and the breaker 14a is opened, so that the high-speed generator The electric power generated at 16 is immediately converted into a desired frequency by the frequency converter 12 via the circuit breaker 14b, and supplied to the shaft drive generator 11c for propulsion. Synchronous phase 13 adjusts the output voltage and frequency of the shaft driving the generator 11 c.

図４は第１実施形態の第３変形例であり、パワーテイクオフタイプの軸駆動発電システムに適用した例である。すなわち、本変形例では主機１に設けたステップアップギヤー１７を介して軸駆動発電機１１ｄを設置している。主機１には主機排ガスで駆動する過給機４が設置され、過給機４には高速発電機１６が直結されている。高速発電機１６は遮断器１４ｂ，１４ａを経て船内電源系統１５に接続されている。
この第１実施形態の第３変形例において、高速発電機１６で発電した電力で軸駆動発電機１１ｄを推進加勢する場合には、遮断器１４ｂを閉、遮断器１４ａを開にして高速発電機１６で発電した電力を遮断器１４ｂを経て周波数変換装置１２で所望する周波数に即時変換して軸駆動発電機１１ｄに供給し推進加勢する。同期調相機１３は軸駆動発電機１１ｄの出力電圧と周波数を調整する。 FIG. 4 shows a third modification of the first embodiment, which is an example applied to a power take-off type shaft drive power generation system. That is, in this modification, the shaft drive generator 11d is installed via the step-up gear 17 provided in the main machine 1. The main engine 1 is provided with a supercharger 4 driven by main engine exhaust gas, and a high speed generator 16 is directly connected to the supercharger 4 . The high speed generator 16 is connected to the inboard power supply system 15 through the circuit breakers 14b and 14a.
In the third modification of the first embodiment, when the shaft-driven generator 11d is propelled and energized with the electric power generated by the high-speed generator 16, the breaker 14b is closed and the breaker 14a is opened, and the high-speed generator the electric power generated by the 16 breaker 14b menstrual immediately converted to Kase promote supplies to the shaft driving the generator 11 d and the desired frequency by the frequency converter 12. Synchronous phase 13 adjusts the output voltage and frequency of the shaft driving the generator 11 d.

図２乃至図４の第１乃至第３変形例は、上記した機能および効果以外の機能および効果はいずれも第１実施形態と同様であるので、その説明は省略する。   Since the functions and effects other than the functions and effects described above are the same as those of the first embodiment, the first to third modifications of FIGS. 2 to 4 will not be described.

図５は、本発明の第２実施形態の構成図であり、既に説明した図１の第１実施形態と同一構成部分には同一符号を付して説明する。   FIG. 5 is a block diagram of the second embodiment of the present invention. The same components as those of the first embodiment of FIG.

図５に示すように、本実施形態では主機１とプロペラ２は推進軸３により連結され、推進軸３には軸駆動発電機１１ａが設置されている。主機１には主機排ガスで駆動する過給機４が設置され、過給機４には高速発電機１６が直結されている。高速発電機１６は切替器１８によって周波数変換装置１２の船内電源系統１５側の接点１９ａまたは軸駆動発電機１１ａ側の接点１９ｂに接続できるようになっている。また、軸駆動発電機１１ａは遮断器１４ｃ，周波数変換装置１２，遮断器１４ａを経て船内電源系統１５に接続できるようになっている。同期調相機１３は軸駆動発電機１１ａの出力電圧と周波数を調整する。 As shown in FIG. 5 , in this embodiment, the main machine 1 and the propeller 2 are connected by a propulsion shaft 3, and a shaft drive generator 11 a is installed on the propulsion shaft 3. The main engine 1 is provided with a supercharger 4 driven by main engine exhaust gas, and a high speed generator 16 is directly connected to the supercharger 4. Fast generator 16 is adapted to be connected to the contact point 19b of the contact 19a or the shaft driving the generator 11a of the inboard power supply system 15 side of the frequency converter 12 by switch 18. Moreover, the shaft drive generator 11a can be connected to the inboard power supply system 15 via the circuit breaker 14c, the frequency converter 12, and the circuit breaker 14a. The synchronous phase adjuster 13 adjusts the output voltage and frequency of the shaft drive generator 11a.

本実施形態は上記のように構成されているので、例えば、軸駆動発電機１１ａが故障して船内に電力を供給できなくなった場合は、遮断器１４ｃを開とし、遮断器１４ａを閉、切替器１８を接点１９ｂに接続して過給機４に直結した高速発電機１６で発電した電力を周波数変換装置１２を介して船内電源周波数に即時変換して、船内電源系統１５に供給することができる。このように、軸駆動発電機１１ａの故障時には、過給機４に直結した発電機１６で発電した電力を周波数変換器１２で船内電源周波数に即時変換して船内電源系統１５に供給できるので、システムの冗長性を向上することが可能となる。なお、軸駆動発電機１１ａが正常に動作している場合は、図１の第１実施形態と同様の機能を有し同様な効果が得られる。   Since the present embodiment is configured as described above, for example, when the shaft drive generator 11a fails and power cannot be supplied to the ship, the circuit breaker 14c is opened, and the circuit breaker 14a is closed and switched. The power generated by the high-speed generator 16 directly connected to the supercharger 4 by connecting the battery 18 to the contact 19b is immediately converted into the ship power frequency via the frequency converter 12, and supplied to the ship power system 15. it can. Thus, when the shaft drive generator 11a fails, the power generated by the generator 16 directly connected to the turbocharger 4 can be immediately converted to the inboard power frequency by the frequency converter 12 and supplied to the inboard power system 15. System redundancy can be improved. In addition, when the shaft drive generator 11a is operating normally, it has the same function as the first embodiment of FIG. 1 and the same effect is obtained.

本発明の第１実施形態の構成図。The block diagram of 1st Embodiment of this invention. 本発明の第１実施形態の第１変形例の構成図。The block diagram of the 1st modification of 1st Embodiment of this invention. 本発明の第１実施形態の第２変形例の構成図。The block diagram of the 2nd modification of 1st Embodiment of this invention. 本発明の第１実施形態の第３変形例の構成図。The block diagram of the 3rd modification of 1st Embodiment of this invention. 本発明の第２実施形態の構成図。The block diagram of 2nd Embodiment of this invention. 従来の船舶推進システムの構成図。The block diagram of the conventional ship propulsion system. 従来の他の船舶推進システムの構成図。The block diagram of the other conventional ship propulsion system.

符号の説明Explanation of symbols

１…主機、２…プロペラ、３…推進軸、４…過給機、５ａ…第１発電電動機、５ｂ…発電機、６…減速機、７…排ガスエコノマイザー、８…蒸気タービン、９…推進加勢タービン、１０…第２発電電動機、１１ａ，１１ｂ，１１ｃ，１１ｄ…軸駆動発電機、１２…周波数変換装置、１３…同期調相機、１４ａ，１４ｂ，１４ｃ…遮断器、１５…船内電源系統、１６…高速発電機、１７…ステップアップギヤー、１８…切替器、１９ａ，１９ｂ…接点。   DESCRIPTION OF SYMBOLS 1 ... Main machine, 2 ... Propeller, 3 ... Propulsion shaft, 4 ... Supercharger, 5a ... 1st generator motor, 5b ... Generator, 6 ... Reduction gear, 7 ... Exhaust gas economizer, 8 ... Steam turbine, 9 ... Propulsion Boost turbine, 10 ... second generator motor, 11a, 11b, 11c, 11d ... shaft drive generator, 12 ... frequency converter, 13 ... synchronous phase adjuster, 14a, 14b, 14c ... breaker, 15 ... inboard power system, 16 ... High-speed generator, 17 ... Step-up gear, 18 ... Switch, 19a, 19b ... Contact.

Claims (2)

過給機付き主機とプロペラを推進軸で連結し、当該推進軸に軸駆動発電機を設け、前記軸駆動発電機に接続された周波数変換装置を備えた船舶推進システムにおいて、
前記主機の過給機に直結されて余剰排気エネルギーを回収して発電する高速発電機と、
前記周波数変換装置と船内電源系統との間を接続する第１の遮断器と、
前記高速発電機を前記周波数変換装置および前記第１の遮断器の接続部に接続する第２の遮断器とを備え、
前記軸駆動発電機を推進電動機として使用する場合、前記第１の遮断器を開にするとともに前記第２の遮断器を閉にして前記高速発電機で発電した電力を前記第２の遮断器を経て前記周波数変換装置で前記主機の回転周波数に変換して前記軸駆動発電機に供給し、
前記軸駆動発電機を発電機として使用する場合、前記第１の遮断器を閉にするとともに前記第２の遮断器を開にして前記軸駆動発電機で発電した電力を前記周波数変換装置で船内電源周波数に変換して前記船内電源系統に供給することを特徴とする船舶推進システム。 The turbocharged main engine and the propeller are connected with the propeller shaft, the shaft drive generator provided in the propeller shaft, in a boat propulsion system comprising a connected frequency converter to the shaft drive generator,
And fast generator for generating electric power by recovering the excess exhaust energy is directly connected to the supercharger of the main machine,
A first circuit breaker for connecting between the frequency converter and the ship power system;
A second circuit breaker for connecting the high-speed generator to the connection portion of the frequency converter and the first circuit breaker;
When the shaft-driven generator is used as a propulsion motor, the first circuit breaker is opened and the second circuit breaker is closed, and the electric power generated by the high-speed generator is supplied to the second circuit breaker. Via the frequency converter to convert to the rotation frequency of the main machine to supply to the shaft drive generator,
When the shaft-driven generator is used as a generator, the first circuit breaker is closed and the second circuit breaker is opened, and the power generated by the shaft-driven generator is converted into the ship by the frequency converter. A ship propulsion system, wherein the ship propulsion system is converted into a power frequency and supplied to the ship power system. 過給機付き主機とプロペラを推進軸で連結し、当該推進軸に軸駆動発電機を設け、前記軸駆動発電機に接続された周波数変換装置を備えた船舶推進システムにおいて、
前記主機の過給機に直結されて余剰排気エネルギーを回収して発電する高速発電機と
、
前記周波数変換装置と船内電源系統との間を接続する第１の遮断器と、
前記軸駆動発電装置と前記周波数変換装置との間を接続する第３の遮断器と、
前記高速発電機を前記周波数変換装置の前記第１の遮断器側の接点あるいは前記周波数変換装置の前記第３の遮断器側の接点に接続する切替器とを備え、
前記高速発電機で発生した電力を前記船内電源系統に供給する場合、前記第３の遮断器を開、前記第１の遮断器を閉、前記切替器を前記第３の遮断器側の接点に接続して前記高速発電機で発電した電力を前記切替器を経て前記周波数変換装置で前記船内電源系統の周波数に変換して前記船内電源系統に供給し、
前記軸駆動発電機を推進電動機として使用する場合、前記第１の遮断器を開、前記第３の遮断器を閉、前記切替器を前記第１の遮断器側の接点に接続して前記高速発電機で発電した電力を前記切替器を経て前記周波数変換装置で前記主機の回転周波数に変換して前記軸駆動発電機に供給することを特徴とする船舶推進システム。 In a marine vessel propulsion system that connects a supercharger-equipped main engine and a propeller with a propulsion shaft, provides a shaft drive generator on the propulsion shaft, and includes a frequency conversion device connected to the shaft drive generator.
A high-speed generator directly connected to the supercharger of the main engine for recovering surplus exhaust energy and generating electricity;
,
A first circuit breaker for connecting between the frequency converter and the ship power system;
A third circuit breaker for connecting between the shaft drive power generator and the frequency converter;
A switch for connecting the high-speed generator to a contact on the first circuit breaker side of the frequency converter or a contact on the third circuit breaker side of the frequency converter;
When supplying electric power generated by the high-speed generator to the inboard power system, the third circuit breaker is opened, the first circuit breaker is closed, and the switch is used as a contact on the third circuit breaker side. The power generated by the high-speed generator connected and converted to the frequency of the inboard power system by the frequency converter through the switch and supplied to the inboard power system,
When the shaft-driven generator is used as a propulsion motor, the first circuit breaker is opened, the third circuit breaker is closed, and the switch is connected to a contact on the first circuit breaker side so that the high speed A marine vessel propulsion system , wherein power generated by a generator is converted into a rotation frequency of the main engine by the frequency converter through the switch and supplied to the shaft-driven generator .
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