JP2011105197A - Power supply system for vessel - Google Patents

Power supply system for vessel Download PDF

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JP2011105197A
JP2011105197A JP2009263597A JP2009263597A JP2011105197A JP 2011105197 A JP2011105197 A JP 2011105197A JP 2009263597 A JP2009263597 A JP 2009263597A JP 2009263597 A JP2009263597 A JP 2009263597A JP 2011105197 A JP2011105197 A JP 2011105197A
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power
ship
frequency
power supply
power source
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JP5532211B2 (en
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Takeshi Taniguchi
健 谷口
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Nishishiba Electric Co Ltd
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Nishishiba Electric Co Ltd
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<P>PROBLEM TO BE SOLVED: To supply power suitable for an electric motor for non-propulsion, to reduce power consumption, and to save energy without receiving an influence of a difference of a power source frequency and additionally without using a frequency conversion device when supplying the power from a land power source to the inside of a vessel during the anchoring of the vessel. <P>SOLUTION: The power is received from a diesel generator 1 during the sailing of the vessel, and a motor 4 for propulsion is operated at variable speed through the frequency conversion device 3. When the vessel is anchored, the power is received by being switched to the land power source 6. However, when the power source frequency of the land power source 6 is different from that of the power system of the vessel, the power is supplied to the electric motor 7 for non-propulsion which is affected by the difference of the power source frequency through the frequency conversion device 3, and the power is directly supplied to a usual load 8 which is not affected by the difference of the power source through a generating line 2 in the vessel. When the land power source 6 has the same power source frequency as the power system of the vessel, the power is directly supplied to the electric motor 7 for non-propulsion through the generating line 2 in the vessel. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、船舶の航行時には、船舶内に設置された電源から周波数変換装置を介して推進用電動機に電力を供給して船舶を推進させ、船舶の停泊時には、陸上電源から荷役用等の非推進用電動機等に電力を供給するようにした船舶の電力供給システムに関するものである。   The present invention, when navigating a ship, supplies power to a propulsion motor from a power source installed in the ship via a frequency converter, and propels the ship. The present invention relates to a ship power supply system that supplies power to a propulsion motor or the like.

船舶は、航行時には船舶内に設置された電源から受電して船舶内母線を介して電力を供給し、インバータを介して推進用電動機を可変速運転してプロペラを駆動したり、照明等の通常負荷を稼動したりしている。   The ship receives power from the power supply installed in the ship during navigation and supplies power via the ship's internal bus.The propulsion motor is driven at variable speed via the inverter to drive the propeller, The load is operating.

船舶が港に接岸し、停泊したときには、航行するための推進用電動機を駆動する電力は不要となるが、照明等の通常負荷のみならず、荷役用等の非推進用電動機に電力を供給する必要が生じる。   When the ship is docked at the port and anchored, power to drive the propulsion motor is not necessary, but power is supplied not only to normal loads such as lighting but also to non-propulsion motors such as cargo handling. Need arises.

船舶内の負荷に電力を供給する場合、航行時には船舶内の電源から電力を供給しているが、停泊時には、近年、温暖化ガスを含む排気ガスの放出を削減することが望まれていることから、船舶内の電源であるディーゼル発電機を停止させ、代わりに陸上電源を利用して電力を供給するようにしている。   When power is supplied to the load in the ship, power is supplied from the power supply in the ship at the time of navigation, but at the time of berthing, in recent years, it has been desired to reduce the emission of exhaust gas including warming gas Therefore, the diesel generator, which is the power source in the ship, is stopped, and power is supplied using land power instead.

図２に従来の船舶の電力供給システムの一例を示す。船舶の航行時には、船舶内に設置されたディーゼル発電機１から船舶内母線２および周波数変換装置３を介して推進用電動機４に電力を供給し、プロペラ５を駆動して船舶を推進させる。船舶の停泊時には、陸上電源６から荷役用等の非推進用電動機７や照明等の通常負荷８に電力を供給するようにしている。なお、９ないし１３はそれぞれ開閉器である。   FIG. 2 shows an example of a conventional ship power supply system. When navigating the ship, electric power is supplied from the diesel generator 1 installed in the ship to the propulsion motor 4 via the ship bus 2 and the frequency converter 3, and the propeller 5 is driven to propel the ship. When the ship is anchored, electric power is supplied from the land power source 6 to the non-propulsion motor 7 for cargo handling or the like and the normal load 8 such as lighting. Reference numerals 9 to 13 denote switches.

この場合、船舶内電力系統が例えば周波数６０Ｈｚに予め設定されているのに対し、陸上電源６の電力が周波数５０Ｈｚで供給される場合がある。通常負荷８においては、供給される電源周波数に影響を受けないものを選択できるが、荷役用等の非推進用電動機７は、予め設定された周波数で運転制御される機器であり、電源周波数が異なると、その影響を受けることになるので、陸上電源６の電力を船舶内電力系統で利用できるように、周波数を５０Ｈｚから６０Ｈｚに変換する必要がある。   In this case, the power system in the ship is preset at, for example, a frequency of 60 Hz, whereas the power of the land power source 6 may be supplied at a frequency of 50 Hz. The normal load 8 can be selected so as not to be affected by the supplied power frequency, but the non-propulsion motor 7 for cargo handling or the like is a device whose operation is controlled at a preset frequency. If it is different, it will be affected by this, so it is necessary to convert the frequency from 50 Hz to 60 Hz so that the power of the land power source 6 can be used in the ship power system.

周波数を変換するためには、陸上電源６と船舶内母線２との間に、電動機と発電機を組み合わせたＭ−Ｇセット、または静止型の半導体スイッチを用いたインバータ装置等の周波数変換装置１４を設けることにより対処することができるが、いずれの装置も装置の費用および設置のための費用が必要となるほか、船舶内に大きな設置スペースも要することになる。   In order to convert the frequency, a frequency converter 14 such as an MG set combining an electric motor and a generator or an inverter device using a stationary semiconductor switch is provided between the onshore power source 6 and the ship's bus 2. However, both devices require the cost of the device and the cost for installation, and also require a large installation space in the ship.

そこで例えば特許文献１の図４に記載されているように、船舶内に設置され、船舶内の軸発電機により発生される電力を安定させるために使用されているインバータ装置等の周波数変換装置を利用し、陸上電源から供給される周波数５０Ｈｚの電力を６０Ｈｚに変換して船舶内の通常負荷等に供給することが考えられている。   Therefore, for example, as described in FIG. 4 of Patent Document 1, a frequency conversion device such as an inverter device installed in a ship and used to stabilize power generated by a shaft generator in the ship is used. It is considered that power of a frequency of 50 Hz supplied from a land power source is converted to 60 Hz and supplied to a normal load or the like in a ship.

特開２００７−１５１２１８号公報JP 2007-151218 A

しかしながら、上記のように陸上電源から周波数変換装置を介して船舶内の通常負荷等に電力を供給すると、船舶内の既設の周波数変換装置を利用できるものの、この周波数変換装置を経由して全ての船舶内負荷に電力供給することになり、常時使用することの多い通常負荷の使用のために周波数変換装置を長時間運転することになったり、周波数変換装置の通電容量が大きくなったりして電力消費が増大し、省エネルギーの面から効率的でないという問題があった。   However, as described above, when power is supplied from the onshore power source to the normal load or the like in the ship through the frequency converter, the existing frequency converter in the ship can be used, but all the power is transmitted through this frequency converter. Electricity is supplied to the ship's internal load, and the frequency converter is operated for a long time due to the use of a normal load that is often used at all times, or the current carrying capacity of the frequency converter increases. There is a problem that consumption is increased and energy is not efficient.

本発明の目的は、上記従来技術の問題点を解決するためになされたものであり、船舶の停泊時に、陸上電源から船舶内に電力を供給するに際して、電源周波数の相違による影響を受けることなく、しかも別途、周波数変換装置を用いることなく、非推進用電動機に適切な電力を供給することができ、さらに電力消費を低減し、省エネルギー化を図ることのできる船舶の電力供給システムを提供することを目的とする。   The object of the present invention is to solve the problems of the prior art described above, and when power is supplied from the onshore power source to the ship when the ship is anchored, it is not affected by the difference in the power supply frequency. In addition, it is possible to provide a ship power supply system that can supply appropriate power to a non-propulsion motor without using a frequency converter, and that can further reduce power consumption and save energy. With the goal.

上記目的を達成するために本発明による船舶の電力供給システムは、船舶の航行時には、船舶内に設置された電源から可変速運転用の周波数変換装置を介して推進用電動機に電力を供給し、船舶の停泊時には、陸上電源から受電して荷役用等の非推進用電動機および照明等の通常負荷に電力を供給するようにした船舶の電力供給システムにおいて、陸上電源の周波数が、船舶内の電力系統における、予め設定された電源周波数と異なる場合には、周波数変換装置を介して予め設定された電源周波数と同じ周波数に変換して非推進用電動機に電力を供給するように構成したことを特徴とする。   In order to achieve the above object, a ship power supply system according to the present invention supplies power to a propulsion motor from a power source installed in a ship via a frequency converter for variable speed operation during navigation of the ship, In a ship power supply system that receives power from a land power source and supplies power to a normal load such as a non-propulsion motor for cargo handling and lighting when the ship is anchored, the frequency of the land power source When the power supply frequency is different from a preset power supply frequency in the system, the power supply frequency is converted to the same frequency as the preset power supply frequency via the frequency conversion device, and power is supplied to the non-propulsion motor. And

本発明による船舶の電力供給システムによれば、船舶の停泊時に陸上電源の電力を船舶内に供給する際に、電源周波数の相違による影響を受ける荷役用等の非推進用電動機を、船舶内に設置されている可変速運転用の周波数変換装置のインバータに接続して周波数変換することにより、別途、周波数変換装置を用いることなく、非推進用電動機に対して適切な電力を供給することができる。   According to the power supply system for a ship according to the present invention, a non-propulsion motor for cargo handling or the like that is affected by a difference in power supply frequency when supplying power from a land power source to the ship when the ship is anchored. By connecting to the inverter of the installed frequency converter for variable speed operation and performing frequency conversion, appropriate power can be supplied to the non-propulsion motor without using the frequency converter separately. .

本発明による船舶の電力供給システムの一実施の形態を示すシステム構成図である。1 is a system configuration diagram showing an embodiment of a ship power supply system according to the present invention. 従来の船舶の電力供給システムの一実施の形態を示すシステム構成図である。It is a system block diagram which shows one Embodiment of the power supply system of the conventional ship.

以下、本発明の実施の形態について図面を参照して説明する。図1は本発明による船舶の電力供給システムの一実施の形態を示すシステム構成図であり、図２と同一部分には同一符号を付している。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a system configuration diagram showing an embodiment of a ship power supply system according to the present invention. The same reference numerals are given to the same parts as those in FIG.

図１において、船舶内に設置されたディーゼル発電機１は、開閉器９を介して船舶内母線２に接続されている。実際の船舶ではディーゼル発電機１は複数台備えられているが、図示では１台で表示している。   In FIG. 1, a diesel generator 1 installed in a ship is connected to a ship internal bus 2 via a switch 9. In an actual ship, a plurality of diesel generators 1 are provided, but one is shown in the figure.

船舶内母線２には、コンバータ３ａ、コンデンサ３ｂおよびインバータ３ｃを有する可変速運転用の周波数変換装置３が開閉器１０を介して接続されている。コンバータ３ａは、開閉器１０を介して船舶内母線２から受電した交流電力を直流電力に変換し、コンデンサ３ｂは、コンバータ３ａが出力する直流電圧を平滑にし、インバータ３ｃは、直流電力を可変電圧可変周波数の交流電力に変換して出力する。   A frequency converter 3 for variable speed operation having a converter 3a, a capacitor 3b, and an inverter 3c is connected to the in-boat bus 2 via a switch 10. Converter 3a converts AC power received from shipboard bus 2 via switch 10 into DC power, capacitor 3b smoothes the DC voltage output from converter 3a, and inverter 3c converts DC power into variable voltage. Convert to AC power of variable frequency and output.

この周波数変換装置３の出力側には、開閉器１５を介して船舶を推進する推進用電動機４が接続されているとともに開閉器１６およびフィルタ１７を介して荷役用等の非推進用電動機７が接続されている。また非推進用電動機７は、開閉器１２を介して船舶内母線２にも接続されており、周波数変換装置３および船舶内母線２のいずれか一方を選択して接続することが可能で、しかもいずれからも切り離せるようになっている。   A propulsion motor 4 for propelling a ship is connected to the output side of the frequency conversion device 3 via a switch 15 and a non-propulsion motor 7 for cargo handling or the like is connected via a switch 16 and a filter 17. It is connected. Further, the non-propulsion motor 7 is also connected to the in-ship bus 2 via the switch 12, and it is possible to select and connect either the frequency converter 3 or the in-ship bus 2. It can be separated from either.

推進用電動機４が周波数変換装置３に接続され、可変速で運転されると、この推進用電動機４に直結されたプロペラ５が可変速で駆動されて船舶を推進させるようになっている。   When the propulsion motor 4 is connected to the frequency converter 3 and operated at a variable speed, the propeller 5 directly connected to the propulsion motor 4 is driven at a variable speed to propel the ship.

荷役用等の非推進用電動機７は、一般には船舶が港に停泊中にのみ使用され、予め設定された周波数で運転制御される負荷であり、電源周波数が相違すると、その影響を受ける機器である。この非推進用電動機７は、複数台備える場合もあるが、図示では１台で表示している。また非推進用電動機７側に設けられたフィルタ１７は、高調波を低減するものであり、高調波を低減する必要がなければ、省略することができる。   The non-propulsion motor 7 for cargo handling or the like is a load that is generally used only when the ship is anchored at the port and is controlled to operate at a preset frequency. is there. Although there may be a plurality of non-propulsion motors 7 in the drawing, one is shown in the figure. Further, the filter 17 provided on the non-propulsion motor 7 side reduces harmonics and can be omitted if it is not necessary to reduce the harmonics.

この非推進用電動機７は、船舶内母線２に船舶内の電力系統として予め設定された、例えば電源周波数６０Ｈｚと同じ周波数の電力が供給される場合には、開閉器１６が開、開閉器１２が閉となって船舶内母線２から直接電力が供給されるようになっている。   When the non-propulsion motor 7 is supplied with power of the same frequency as a power frequency of 60 Hz, for example, which is preset as a power system in the ship, the switch 16 is opened and the switch 12 is opened. Is closed and power is directly supplied from the in-ship bus 2.

他方、船舶内母線２に電源周波数５０Ｈｚの電力が供給される場合には、開閉器１６が閉、開閉器１２が開となって周波数変換装置３を介して６０Ｈｚに周波数変換された電力が供給されるようになっている。   On the other hand, when power with a power supply frequency of 50 Hz is supplied to the ship's internal bus 2, the switch 16 is closed and the switch 12 is opened, and the power converted to 60 Hz is supplied via the frequency converter 3. It has come to be.

非推進用電動機７の不使用時には、開閉器１２，１６をそれぞれ開として船舶内母線２側の電力系統から切り離すことができる。   When the non-propulsion motor 7 is not used, the switches 12 and 16 can be opened to be disconnected from the power system on the ship's bus 2 side.

船舶内母線２には、推進用および非推進用電動機４，７に電力を供給する系統とは別に、開閉器１３を介して通常負荷８に電力を供給する系統が設けられている。通常負荷８は、船舶内の照明・空調等の、電源周波数の相違による影響を受けない負荷であり、船舶の推進のために直接必要とする負荷ではないが、船舶の航行時および停泊時ともに常時使用することの多い負荷である。   In addition to the system for supplying power to the propulsion and non-propulsion motors 4 and 7, the ship internal bus 2 is provided with a system for supplying power to the normal load 8 via the switch 13. The normal load 8 is a load that is not affected by the difference in power supply frequency such as lighting and air conditioning in the ship, and is not a load that is directly required for propulsion of the ship. It is a load that is often used all the time.

また船舶内母線２には、開閉器１１を介して陸上電源６が接続できるようになっており、船舶の停泊時には、陸上電源６から受電して船舶内母線２を介して船舶内の所定の負荷に電力を供給するようになっている。   Further, a land power source 6 can be connected to the in-ship bus 2 via a switch 11, and when the ship is anchored, a power is received from the on-site power source 6 and a predetermined inside of the ship via the in-bus bus 2. Power is supplied to the load.

このように構成された船舶の電力供給システムにおいて、まず船舶が航行中の動作を説明する。船舶を航行させるために開閉器９は閉になっており、ディーゼル発電機１の運転により発電された、例えば周波数６０Ｈｚの電力は、船舶内母線２、開閉器１０、周波数変換装置３および開閉器１５を介して推進用電動機４に供給され、推進用電動機４に直結されたプロペラ５を駆動して船舶を推進させている。このとき開閉器１６は開となっており、荷役用等の非推進用電動機７には通電されていない。   In the ship power supply system configured as described above, an operation during navigation of the ship will be described first. The switch 9 is closed to navigate the ship, and the power generated by the operation of the diesel generator 1, for example, the power of frequency 60 Hz, is the ship's bus 2, switch 10, frequency converter 3, and switch. The propeller 5 that is supplied to the propulsion motor 4 through 15 and directly connected to the propulsion motor 4 is driven to propel the ship. At this time, the switch 16 is open and the non-propulsion motor 7 for cargo handling or the like is not energized.

一方、通常負荷８側の開閉器１３は、閉になっており、船舶内母線２を介して通常負荷８に周波数６０Ｈｚの電力が供給されている。   On the other hand, the switch 13 on the side of the normal load 8 is closed, and electric power with a frequency of 60 Hz is supplied to the normal load 8 through the ship bus 2.

次に船舶の停泊中の動作を説明する。船舶が港に接岸し停泊すると、ディーゼル発電機１を停止し、開閉器９を開にして周波数６０Ｈｚの電力供給を停止するとともに開閉器１１を閉にして陸上電源６を船舶内母線２に接続し、陸上電源６より例えば電源周波数５０Ｈｚの電力を供給する。   Next, the operation while the ship is anchored will be described. When the ship berthed at the port and anchored, the diesel generator 1 was stopped, the switch 9 was opened to stop the power supply at a frequency of 60 Hz, the switch 11 was closed, and the onshore power supply 6 was connected to the in-ship bus 2. Then, for example, power with a power frequency of 50 Hz is supplied from the land power source 6.

船舶を推進するための推進用電動機４は、運転する必要がないために開閉器１５を開にして周波数変換装置３とは切り離す。非推進用電動機７側は、開閉器１６を閉にし、開閉器１２を開にして、船舶内母線２からの５０Ｈｚの交流電力を周波数変換装置３のコンバータ３ａで直流電力に変換し、インバータ３ｃにより６０Ｈｚの交流電力に変換して出力し、フィルタ１７を介して電源周波数の相違による影響を受ける荷役用等の非推進用電動機７に供給する。   Since the propulsion motor 4 for propelling the ship does not need to be operated, the switch 15 is opened and separated from the frequency converter 3. On the non-propulsion motor 7 side, the switch 16 is closed, the switch 12 is opened, and the AC power of 50 Hz from the ship internal bus 2 is converted into DC power by the converter 3a of the frequency converter 3, and the inverter 3c Is converted into 60 Hz AC power and output, and supplied to a non-propulsion motor 7 for cargo handling or the like that is affected by the difference in power supply frequency via a filter 17.

電源周波数の相違による影響を受けない通常負荷８は、開閉器１３が閉の状態に維持され、陸上電源６から船舶内母線２を介して周波数５０Ｈｚの電力が直接供給されることになる。   The normal load 8 that is not affected by the difference in power supply frequency is maintained in the state in which the switch 13 is closed, and power with a frequency of 50 Hz is directly supplied from the land power supply 6 via the ship bus 2.

陸上電源６より例えば電源周波数６０Ｈｚの電力が供給される場合には、非推進用電動機７側は、開閉器１６を開にし、開閉器１２を閉にして、船舶内母線２からの６０Ｈｚの交流電力を直接非推進用電動機７に供給する。   For example, when power with a power frequency of 60 Hz is supplied from the land power source 6, the non-propulsion motor 7 side opens the switch 16, closes the switch 12, and 60 Hz alternating current from the in-ship bus 2. Electric power is supplied directly to the non-propulsion motor 7.

このように本実施の形態によれば、荷役用等の非推進用電動機７に対して、陸上電源６の周波数が例えば５０Ｈｚというように、船舶内の電力系統として予め設定されている電源周波数６０Ｈｚと相違していても、船舶内に設置されている可変速運転用の周波数変換装置３を利用することにより、船舶内の電力系統と同様の周波数６０Ｈｚに変換できるので、別途、周波数変換装置を船舶内に設けることなく適切な電力の供給を行なうことができる。   As described above, according to the present embodiment, the power frequency 60 Hz that is set in advance as the power system in the ship such that the frequency of the land power source 6 is 50 Hz, for example, for the non-propulsion motor 7 for cargo handling or the like. Even if they are different from each other, the frequency converter 3 for variable speed operation installed in the ship can be used to convert the frequency to 60 Hz, which is the same as the power system in the ship. Appropriate power can be supplied without being provided in the ship.

また電源周波数の影響を受けない通常負荷８については、周波数変換装置３を通さずに陸上電源６の周波数５０Ｈｚの電力を直接供給しているので、常時使用されることの多い通常負荷８に電力を供給するために周波数変換装置３を常時運転する必要がなくなり、運転時間を短くすることができるとともに周波数変換装置３の通電容量も少なくなり、電力消費を抑制できて省エネルギー化を図ることができる。   Further, for the normal load 8 that is not affected by the power supply frequency, the power of the frequency 50 Hz of the land power supply 6 is directly supplied without passing through the frequency converter 3, so that power is supplied to the normal load 8 that is often used at all times. Therefore, it is not necessary to always operate the frequency conversion device 3 to supply power, the operation time can be shortened, and the current-carrying capacity of the frequency conversion device 3 is reduced, so that power consumption can be suppressed and energy saving can be achieved. .

さらに陸上電源６の電源周波数が船舶内の電力系統として予め設定されている電源周波数６０Ｈｚと同じ場合には、船舶内母線２から開閉器１２を介して非推進用電動機７に直接電力を供給し、周波数変換装置３を経由させない。これにより周波数変換装置３を必要なときだけ運転することができることになり、電力消費を低減して省エネルギー化を図ることができる。   Further, when the power frequency of the onshore power source 6 is the same as the power frequency of 60 Hz set in advance as the power system in the ship, power is directly supplied from the in-bus bus 2 to the non-propulsion motor 7 via the switch 12. The frequency converter 3 is not routed. As a result, the frequency conversion device 3 can be operated only when necessary, and power consumption can be reduced to save energy.

なお、陸上電源６の異常により、供給する電力に瞬時電圧低下が発生した場合においては、周波数変換装置３のコンバータ３ａの入力電圧が低下するが、ンデンサ３ｂが電荷を蓄えているために、電圧低下の時間が短ければ、コンデンサ３ｂの電圧がほとんど低下しないので、インバータ３ｃの出力電圧には影響することがなく、非推進用電動機７に影響が及ぶことはない。   Note that, when an instantaneous voltage drop occurs in the supplied power due to an abnormality in the onshore power supply 6, the input voltage of the converter 3a of the frequency conversion device 3 is reduced. If the decrease time is short, the voltage of the capacitor 3b hardly decreases. Therefore, the output voltage of the inverter 3c is not affected, and the non-propulsion motor 7 is not affected.

また、上記実施の形態では、船舶内の電力系統を周波数６０Ｈｚに設定している場合について説明したが、逆に周波数５０Ｈｚに設定されている場合についても同様に実施できるものである。   Moreover, although the said embodiment demonstrated the case where the electric power system in a ship was set to the frequency of 60 Hz, conversely, it can implement similarly also when the frequency is set to 50 Hz.

１…ディーゼル発電機
２…船舶内母線
３…周波数変換装置
３ａ…コンバータ
３ｂ…コンデンサ
３ｃ…インバータ
４…推進用電動機
５…プロペラ
６…陸上電源
７…荷役用等の非推進用電動機
８…通常負荷
９，１０，１１，１２，１３，１５，１６…開閉器
１４…周波数変換装置
１７…フィルタ DESCRIPTION OF SYMBOLS 1 ... Diesel generator 2 ... Ship internal bus 3 ... Frequency converter 3a ... Converter 3b ... Capacitor 3c ... Inverter 4 ... Propulsion motor 5 ... Propeller 6 ... Land power supply 7 ... Non-propulsion motor 8 for cargo handling etc ... Normal load 9, 10, 11, 12, 13, 15, 16 ... switch 14 ... frequency converter 17 ... filter

Claims (2)

船舶の航行時には、船舶内に設置された電源から可変速運転用の周波数変換装置を介して推進用電動機に電力を供給し、船舶の停泊時には、陸上電源から受電して荷役用等の非推進用電動機および照明等の通常負荷に電力を供給するようにした船舶の電力供給システムにおいて、前記陸上電源の周波数が、船舶内母線における、予め設定された電源周波数と異なる場合には、前記周波数変換装置を介して予め設定された電源周波数と同じ周波数に変換して前記非推進用電動機に電力を供給するように構成したことを特徴とする船舶の電力供給システム。   When navigating the ship, power is supplied to the propulsion motor from the power supply installed in the ship via the frequency converter for variable speed operation, and when the ship is anchored, it receives power from the onshore power supply and is not propelled for cargo handling etc. In a ship power supply system that supplies power to a normal load such as an electric motor and lighting, the frequency conversion is performed when the frequency of the onshore power supply is different from a preset power supply frequency in a ship internal bus. A ship power supply system configured to supply power to the non-propulsion motor by converting the frequency to the same frequency as a preset power supply frequency via a device. 前記船舶の停泊時には、前記船舶内の電源を前記船舶内母線から切り離すとともに前記陸上電源を前記船舶内母線に接続し、さらに前記推進用電動機を前記周波数変換装置から切り離すとともに前記陸上電源の電源周波数に応じて前記非推進用電動機を前記周波数変換装置または前記船舶内母線のいずれか一方を選択して接続することにより、前記陸上電源の電力を前記非推進用電動機に供給することを特徴とする請求項１に記載の船舶の電力供給システム。   At the time of berthing of the ship, the power source in the ship is disconnected from the bus line in the ship and the land power source is connected to the bus line in the ship, and the propulsion motor is disconnected from the frequency converter and the power frequency of the land power source The non-propulsion motor is supplied to the non-propulsion motor by selecting either the frequency converter or the ship's internal bus and connecting the non-propulsion motor to the non-propulsion motor. The ship power supply system according to claim 1.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101253997B1 (en) * 2012-01-27 2013-04-12 시엔에이전기 주식회사 Power supply system for ship
JP7041764B1 (en) * 2021-02-17 2022-03-24 川崎重工業株式会社 Marine power system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5918216A (en) * 1982-07-22 1984-01-30 Hitachi Zosen Corp Electrical propelling device
JP2005237151A (en) * 2004-02-20 2005-09-02 Japan Radio & Electric Manufacture Co Ltd Feeding method from ground to ship and system thereof

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5918216A (en) * 1982-07-22 1984-01-30 Hitachi Zosen Corp Electrical propelling device
JP2005237151A (en) * 2004-02-20 2005-09-02 Japan Radio & Electric Manufacture Co Ltd Feeding method from ground to ship and system thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101253997B1 (en) * 2012-01-27 2013-04-12 시엔에이전기 주식회사 Power supply system for ship
JP7041764B1 (en) * 2021-02-17 2022-03-24 川崎重工業株式会社 Marine power system

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