JP4656990B2 - Ship power supply device and ship power supply switching method - Google Patents

Description

  The present invention relates to a ship power supply device and a ship power supply switching method for receiving power supply from an external power source outside the ship while the ship is anchored.

  2. Description of the Related Art Conventionally, there has been known a ship that is equipped with a power generation device in a ship and that can receive power from an external power supply (land power supply) installed on land.

  FIG. 5 is a schematic configuration diagram of a conventional ship provided with the onboard power generation device 102. The ship 100 includes an inboard power generation device 102 (for example, a diesel engine with a generator). The inboard power generation device 102 is a main unit for supplying electric power to other devices in the ship via a circuit breaker 104. It is electrically connected to the bus 106.

  Further, for example, the upper deck 108 is provided with a power receiving terminal 110, and the power receiving terminal 110 and the main bus 106 are electrically connected to each other via an inboard cable 112. Further, a circuit breaker 114 is provided at an intermediate portion of the inboard cable 112.

  Further, the ship 100 includes a governor 103 and a power generation control device 105. The governor 103 is provided in the inboard power generation apparatus 102, and the power generation control apparatus 105 controls the governor 103 to control the power generation output, the power generation frequency, and the phase. The circuit breakers 104 and 114 are, for example, VCBs (Vacuum Circuit Breakers), and the power generation control device 105 can remotely control the circuit breaker / connection at any time. In general, the circuit breaker 114 is not controlled by the power generation control device 105 but is manually operated.

  With the above-described configuration, the power receiving terminal 110 and the land external power supply terminal 116 installed on the quay are connected to each other by the cable 118, the circuit of the circuit breaker 104 is opened, and the circuit of the circuit breaker 114 is closed. The power supply can be received from onshore power supply equipment.

  In addition, as a technique relevant to the said prior art, the technique of the following patent document 1 is known, for example.

JP 2001-309553 A

  By the way, when switching the power source used by the ship 100 from the inboard power generation device 102 to the external power source, the circuit path of the circuit breaker 114 is closed after the circuit circuit of the circuit breaker 104 is opened, and conversely, the inboard power generation device 102 from the external power source is closed. In the case of switching to, the circuit of the circuit breaker 114 is opened and then the circuit of the circuit breaker 104 is closed, so that a state where power is not temporarily supplied to the main bus 106 occurs, and a power failure occurs once in the ship 100. There is a problem of doing.

  The present invention has been made in view of the above problems, and includes a power generation device for supplying electric power used by itself, and can be supplied with electric power from an external power source. It is an object of the present invention to provide a ship power supply device and a ship power supply switching method that can be switched without a power failure when the power supply source used in the system is switched.

  The present invention is a ship power supply device for supplying power from an external power source to a ship having an inboard power generation device for supplying power to be used in the ship, the floating body floating on water, the floating body installed on the floating body, A land-side cable reel device having a winding cable connectable to a land power source as a power source and capable of winding or unwinding the winding cable; and installed on the floating body and electrically connected to the land-side cable reel device A winding cable that is connected to a power receiving terminal provided in the ship to receive power from the external power source, and has a winding cable for supplying the power from the external power source to the ship. A ship-side cable reel device capable of winding or unwinding the take-up cable, and a power supply source installed on the floating body to be used in the ship. And a power supply switching means capable of switching the uninterruptible between the source, characterized in that (claim 1).

The ship power supply apparatus of the present invention preferably includes a transformer that is installed on the floating body and transforms the voltage of the external power supply to the voltage of the inboard power generation apparatus.

Further, in the ship power supply device of the present invention, preferably, the power supply switching means includes an external power supply detection means for detecting at least one of a power supply frequency and a phase of an external power supply, and a power supply frequency and a phase of the inboard power generation apparatus. An onboard power source detecting means for detecting at least one of them, and a matching means for matching at least one of the power frequency and phase of the onboard power generator with the external power source.

In the above-described ship power supply device of the present invention, preferably, the power supply switching means is configured to remotely control the ship power generation device when the power source used on the ship is switched from the ship power generation device to the external power supply. The switching is performed with the power generation frequency at which the power is generated lower than the power supply frequency of the external power supply.

Further, in the ship power supply device according to the present invention, preferably, the power switching means includes a first circuit breaker that connects or blocks an electric circuit connecting the land-side cable reel device and the ship-side cable reel device, and at least the A power supply control unit for controlling the first circuit breaker, wherein the power supply control unit switches the power supply source used in the ship from the inboard power generation device to the external power source. The power generation frequency generated by the inboard power generation device is slightly lower than the power supply frequency of the external power source, and the first circuit breaker is connected. A second circuit breaker for connecting or disconnecting an electric circuit connecting the main bus line for supplying power to the equipment in the ship and the power receiving terminal is connected by remote control, the first circuit breaker and the front circuit breaker After the second breaker to the connected state, the third circuit breaker which connects or disconnects the electric path connecting said inboard main bus and the marine power generation apparatus as a blocking state by remote control, perform the switching.

In the ship power supply device of the present invention, preferably, the switching means switches the power supply source used in the ship from the external power source to the ship power generation device by remote control. The switching is performed by setting the power generation frequency of power generation higher than the power supply frequency of the external power supply.

In the ship power supply device according to the present invention, preferably, the power switching unit includes a first circuit breaker that connects or blocks an electric circuit connecting the external power source and the ship side cable reel device, and at least the first circuit breaker. A power supply control unit that controls the circuit breaker, and the power supply control unit, when switching the power supply source used in the ship from the external power source to the inboard power generation device, the rotational speed of the prime mover of the inboard power generation device The inboard main bus for supplying power to the equipment in the ship while remotely controlling the power generation frequency generated by the inboard power generation apparatus slightly higher than the power supply frequency of the external power source A third circuit breaker that connects or disconnects the electric circuit connecting the power generation device and the ship power generation device by remote control, and after the third circuit breaker is connected, the first circuit breaker and the inboard main bus A second circuit breaker for connecting or disconnecting the electric path connecting said power receiving terminal as a blocking state by remote control, perform the switching.

Further, the present invention is a ship power supply switching method for switching a power supply source for use in a ship from the ship power generation apparatus to an external power source in a ship provided with a ship power generation apparatus for supplying power used in the ship. A land-side cable reel device that has a winding cable that can be connected to a land power source that is the external power source on a floating body that floats on water, and that can wind or unwind the winding cable; and the land-side cable reel device A winding cable that is electrically connected and is connectable to a power receiving terminal provided in the ship to receive power from the external power source, and is used to supply power from the external power source to the ship. A ship side cable reel device that has a cable and can wind or unwind the take-up cable, and a power supply source used in the ship from the ship power generator A power supply switching device capable of switching to an external power source without a power failure, and connecting the winding cable of the land-side cable reel device to the external power source, and the land-side cable reel device And a first circuit breaker for connecting or cutting off the electric circuit connecting the ship side cable reel device and a second circuit for connecting or cutting off the electric circuit connecting the ship main bus for supplying power to the ship equipment and the power receiving terminal. While the both circuit breakers are in the disconnected state, the winding cable of the ship side cable reel device is connected to the power receiving terminal, and the rotational speed of the prime mover of the ship power generator is remotely controlled so that the ship power generator generates power. The power generation frequency is slightly lower than the power supply frequency of the external power supply, the first circuit breaker is connected, and the second circuit breaker is remotely controlled. A third circuit breaker for connecting or disconnecting the electrical circuit connecting the inboard main bus and the ship power generation device after the first circuit breaker and the second circuit breaker are connected. The switching is performed as a cut-off state by control.

In the ship power supply switching method according to the present invention, preferably, a drive pulley that is rotationally driven by the floating body is installed, a rotatable driven pulley is installed in the ship, and the winding cable is attached to the ship. When connecting, an endless wire is stretched between the drive pulley and the driven pulley, the winding cable is attached to the endless wire, the driving pulley is rotated, and the winding cable is pulled up to the ship.

The present invention also provides a power supply source for use in a ship from the external power supply in a ship having an inboard power generation device for supplying power used in the ship and capable of receiving power supply from an external power supply. A power supply switching method for a ship to be switched to the inboard power generation device, wherein a floating body floating on the water has a winding cable that can be connected to a land power source that is the external power source, and the winding cable can be wound or fed out. A land-side cable reel device, and a winding cable that is electrically connected to the land-side cable reel device and is connectable to a power receiving terminal provided in the ship to receive power from the external power source. A ship-side cable reel device having a winding cable for supplying power from the external power source to the ship and capable of winding or unwinding the winding cable; A power supply switching means capable of switching a power supply source used in a ship from the inboard power generation apparatus to the external power supply without interruption, and using the ship power supply device, the winding cable of the shipside cable reel device Is connected to the ship, and supplies electric power to the first circuit breaker for connecting or blocking the electric circuit connecting the land-side cable reel device and the ship-side cable reel device, and the equipment in the ship. When the second breaker that connects or cuts off the electric circuit connecting the main bus for the ship and the power receiving terminal connected to the ship is in a connected state, the number of revolutions of the prime mover of the inboard power generator is remotely controlled. The power generation frequency generated by the onboard power generation device is controlled to be slightly higher than the power supply frequency of the external power source, and the power that connects the inboard main bus and the onboard power generation device is controlled. A third circuit breaker for connecting or disconnecting the first circuit breaker is set to a connected state by remote control, and after the third circuit breaker is set to a connected state, the first circuit breaker is set to a disconnected state and the second circuit breaker is The switching is performed as a shut-off state by remote control.

  According to the ship power supply device and the ship power supply switching method of the present invention, it is possible to switch the power supply source used in the ship from the inboard power generation device to the external power source, or from the external power source to the inboard power generation device without interruption. . In addition, since the power supply source can be switched uninterrupted, it is possible to obtain excellent effects such as being able to continue using the electrical equipment used in the ship without any trouble even at the time of switching. .

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the accompanying drawings. In each figure, the same portions are denoted by the same reference numerals, and redundant description is omitted.

  FIG. 1 shows a schematic configuration of a ship power supply apparatus 10 according to the first embodiment of the present invention, and a ship 100 is berthed at a predetermined interval from a quay Q, during which the ship power supply apparatus 10 is stopped. FIG. FIG. 1 shows the ship 100 viewed from the front side to the rear side of the ship 100.

  The ship 100 is equipped with an appropriate number of onboard power generators 102 (for example, a diesel engine with a generator) in order to supply power used by the ship 100, and can receive power from an external power source. It is configured.

  The inboard power generation device 102 is electrically connected to an inboard main bus 106 for supplying electric power to other devices in the ship through a circuit breaker 104. The inboard main bus 106 supplies power to equipment (for example, lighting equipment and refrigeration equipment) installed on the ship 100. The circuit breaker 104 has a function of connecting or blocking an electric circuit (electric power supply line 116) that connects the inboard main bus 106 and the inboard power generation apparatus 102, and includes, for example, a (Vacuum Circuit Breaker).

  Then, under the control of the power generation control device 105, by setting the circuit breaker 104 to the connected state, power is supplied from the inboard power generation device 102 to the inboard main bus 106, and conversely, the circuit breaker 104 is set to the disconnected state. The power supply from the inboard power generation device 102 to the inboard main bus 106 is stopped. Further, the ship 100 has a high voltage system in which the power supply voltage in the ship is 6600V.

  In addition, assuming that the ship 100 is a passenger ship or a container ship for transporting frozen cargo that consumes more electricity than other ships, for example, power generation of a power plant installed on land is used as an external power source. We will assume facilities.

  For example, the upper deck 108 is provided with a power receiving terminal 110, and the power receiving terminal 110 and the inboard main bus 106 are electrically connected to each other via an inboard cable 112. Further, a circuit breaker 114 is provided at an intermediate portion of the inboard cable 112. The circuit breaker 114 has a function of connecting or blocking an electric circuit (inboard cable 112) that connects the inboard main bus 106 and the power receiving terminal 110, and is composed of, for example, a VCB.

  The ship 100 includes a power generation frequency detection means (not shown) capable of detecting the power generation frequency of the inboard power generation apparatus 102 and a power generation apparatus phase detection means (not shown) capable of detecting the phase of electricity generated by the inboard power generation apparatus 102. Have

  Further, the ship 100 includes a governor 103 and a power generation control device 105. The governor 103 is provided in the inboard power generation apparatus 102, and the power generation control apparatus 105 controls the governor 103 while monitoring the power generation frequency from the power generation frequency detection means and the phase from the power generation apparatus phase detection means. The power generation output, power generation frequency, and phase are controlled. Further, the power generation control device 105 can remotely control switching between the connection state and the interruption state of the circuit breakers 104 and 114 via a signal line.

  The ship 100 may be either existing or new. Further, in the case of an existing ship, it is preferable that the governor 103 and the power generation control device 105 are provided, but they may be added by remodeling. If this modification is difficult, this may be omitted, and other means having the same function or manual operation may be used in combination.

  Next, each apparatus for supplying electric power from the external power source to the ship 100 will be described.

  A socket 1 that is an example of a connection terminal of a land power source P as an external power source is installed in a portion of the quay Q close to the sea (for example, the upper surface of the quay and the end on the sea side). The socket 1 is connected to a 6600 V high voltage system such as a power plant installed on the land via a cable P3 wired in the quay Q. The land power source P is not limited to the 6600 V high voltage system, but may be another high voltage system or another voltage system.

  By installing the cable in the socket 1 as described above, there is no interference between the container crane and the cable for carrying cargo such as containers into and out of the ship, and the container crane can be easily installed on the quay.

  The ship power supply device 10 of the present invention includes a floating body 8, a land-side cable reel device 12, a ship-side cable reel device 20, and a power source switching means 40. Hereinafter, each component will be described.

  The floating body 8 floats on the sea (on the water) and is composed of, for example, a barge ship. The floating body 8 may be a self-propelled type having a power unit, or a marine vessel without a power unit.

  The land-side cable reel device 12 is installed on the floating body 8 and can be connected to a land power source P that is an external power source, a reel 15 that winds and unwinds the winding cable 14, and a reel. Drive device 16 (for example, an electric motor) that rotationally drives 15, a feed amount detector 17 that detects a feed length of the winding cable 14, and a reel that controls the drive device 16 based on a detection value of the feed amount detector 17. And a control device 18.

  The take-up cable 14 is provided with a plug 11 that can be connected to the socket 1 of the land power supply P at its distal end. The reel control device 18 is connected by a control line 5 f and controlled by the power supply control unit 46. The winding cable 14 is preferably a multi-wire cable including a power line for transmitting power and a signal line for transmitting signals. The number of power lines may be two for single phase or three for three phases. There may be one signal line or a plurality of signal lines. The signal line in this embodiment is composed of an optical fiber.

  When the plug 11 is inserted into the socket 1, the signal line provided on the take-up cable 14 and the signal line provided on the cable P3 on the quay Q are connected to each other. .

  When the feeding amount detector 17 detects that the feeding length (extension amount) of the winding cable 14 exceeds a predetermined value, the reel control device 18 performs control to stop the rotation of the driving device 16. .

  By rotating the reel 15 and feeding the take-up cable 14 by the land-side cable reel device 12 configured as described above, the take-up cable 14 is extended as shown by the phantom line in FIG. It reaches to 1. Then, after the plug 11 reaches the socket 1, the operator connects the plug 11 to the socket 1.

  The ship-side cable reel device 20 is installed on the floating body 8, is electrically connected to the land-side cable reel device 12 through the power receiving panel 41, and can be connected to the power receiving terminal 110 of the ship 100. A reel 24 for winding and unwinding the winding cable 22, a drive device 26 (for example, an electric motor) for rotationally driving the reel 24, and a feeding amount detector 28 for detecting the feeding length of the winding cable 22. The reel control device 30 controls the drive device 26 based on the detection value of the feed amount detector 28.

  The take-up cable 22 is provided with a plug 21 that can be connected to the power receiving terminal 110 of the ship 100 at its distal end. The reel control device 30 is connected by a control line 5g and controlled by the power supply control unit 46. The winding cable 22 is a multi-line cable including a power line that transmits electric power and a signal line that transmits signals. The number of power lines may be two for single phase or three for three phases. There may be one signal line or a plurality of signal lines.

  When the feeding amount detector 28 detects that the feeding length (extension amount) of the winding cable 22 exceeds a predetermined value, the reel control device 30 performs control to stop the rotation of the driving device 26. .

  A cable crane 32 is installed at a position adjacent to the ship-side cable reel device 20 and at the end of the ship 100 on the floating body 8. The cable crane 32 has a main body frame 34 and a movable arm 36 that is provided on the upper part of the main body frame and can swing between a horizontal position and an upright position indicated by a virtual line. Twenty winding cables 22 are stretched over, and the winding cable 22 is positioned above the power receiving terminal 110 of the ship 100 in a horizontal position. The movable arm 36 may be configured to be able to turn horizontally, and other configurations may be adopted as long as the winding cable 22 can be positioned to reach the power receiving terminal 110 of the ship 100.

  The ship-side cable reel device 20 and the cable crane 32 thus configured rotate the reel 24 to feed the take-up cable 22 so that the take-up cable 22 extends as shown by the phantom line in FIG. 21 reaches the power receiving terminal 110 of the ship 100. Then, after the plug 21 reaches the power receiving terminal 110, an operator waiting on the ship connects the plug 21 to the power receiving terminal 110.

  Instead of installing the cable crane 32 on the floating body 8, a crane (not shown) is installed on the ship 100 so that the winding cable 22 is pulled up to the power receiving terminal 110 of the ship 100. good.

  The floating body 8 is provided with a power supply switching means 40. The power switching unit 40 includes a power receiving panel 41 and a power feeding control unit 46.

  The power receiving panel 41 is provided with a plug 44. By connecting a socket 54 provided at the tip of another cable 51 extending from the reel 15 of the land-side cable reel device 12 to the plug 44, Electric power can be supplied to the power receiving panel 41 from the land power source P which is an external power source. The power receiving panel 41 is provided with another plug 45, and a socket 55 provided at the tip of another cable 52 extending from the reel 24 of the ship side cable reel device 20 is connected to the plug 45. By doing so, the electric power supplied from the land power source P to the power receiving panel 41 can be supplied to the ship 100 via the ship side cable reel device 20.

  Each of the cables 51 and 52 is a different cable from the winding cables 14 and 22 wound around the reels 15 and 24, and does not extend from the reels 15 and 24 due to the rotation of the reels 15 and 24. The reels 15 and 24 are not wound up. The winding cables 14 and 22 and the cables 51 and 52 are electrically connected to each other via a slip ring or the like provided on the reels 15 and 24.

  Each of the cables 51 and 52 is preferably a multi-wire cable including a power line that transmits electric power and a signal line that transmits a signal. The power line may be two for single phase or three for three phase, and one or more signal lines may be used, but the winding cables 14 and 22 of the land side cable reel device 12 and the ship side cable reel device 20 may be used. It must be compatible with the power line and signal line. That is, the signal line in the cable 14 in the present embodiment is composed of an optical fiber.

  In addition, a circuit breaker 42 is provided inside the power receiving panel 41 and in an intermediate portion of the internal cable 43 serving as an electric path connecting the plug 44 and the other plug 45. The circuit breaker 42 is composed of, for example, a VCB, and has a function of cutting or blocking an electric circuit connecting the plug 44 and another plug 45. In other words, the circuit breaker 42 has a function of connecting or blocking an electric circuit connecting the land-side cable reel device 12 and the ship-side cable reel device 20.

  In addition, since VCB is employ | adopted as the circuit breaker 42, even if it is a high voltage (for example, 6600V), an electric circuit can be interrupted | blocked reliably.

  The power supply control unit 46 is connected to the circuit breaker 42 through the signal line 5a, and performs control to switch the connection state and the circuit breaker state of the circuit breaker 42. The power supply control unit 46 is connected to the reel control devices 18 and 30 through signal lines 5f and 5g, and controls the land-side cable reel device 12 and the ship-side cable reel device 20 via the reel control devices 18 and 30. . Note that the reel control devices 18 and 30 and the power supply control unit 46 may be integrated, and the control lines 5f and 5g may be omitted.

  Further, inside the power receiving panel 41, the plug 44 and the optical converter 61 are connected by a signal line 5c made of an optical fiber. The optical converter 61 has a function of converting an optical signal into an electrical signal and an electrical signal into an optical signal. ing. Information can be transmitted by optical communication between the power supply control unit 46 and the external power supply (land power supply P).

  In addition, the power supply control unit 46 is connected to the plug 45 by the signal line 5 b, and is thereby connected to the signal line inside the cable 52 and the winding cable 22. In the ship 100, the power receiving terminal 110 and the power generation control device 105 are connected by the signal line 6 a, and when the plug 21 of the winding cable 22 is inserted into the power receiving terminal 110 of the ship 100, The signal line and the signal line 6a are connected to each other. The power supply control unit 46 can exchange information with the power generation control device 105 in a state in which the plug 21 of the winding cable 22 is connected to the power receiving terminal 110 of the ship 100. The power generation frequency and phase of the inboard power generation apparatus 102 and the switching between the connection state and the cutoff state of the breakers 104 and 114 can be remotely controlled.

  The power supply switching means 40 includes an external power supply frequency detection means (not shown) capable of detecting the power generation frequency of the external power supply (land power supply P) and an external power supply phase detection means (not shown) capable of detecting the phase of the external power supply. Z).

  The power supply switching means 40 configured in this manner can switch the power supply source used in the ship between the ship power generation apparatus 102 and the external power supply without any power failure. In other words, the power supply source can be switched from the inboard power generation device 102 to the external power supply without interruption, and can be switched from the external power supply to the inboard power generation device 102 without interruption.

  More specifically, when switching the supply source of electric power used in the ship from the inboard power generation device 102 to the external power supply, the power supply control unit 46 determines the power generation frequency of the inboard power generation device 102 detected by the power generation frequency detection means. The frequency of the external power source detected by the external power source frequency detection means is acquired, and the rotational speed of the prime mover of the inboard power generator 102 is gradually decreased by remote control while comparing the power generation frequencies of both. The power generation frequency generated by the inboard power generation device 102 is controlled to be slightly lower than the power supply frequency of the external power source.

  Then, if the power generation frequency generated by the inboard power generation device 102 is slightly lower than the power supply frequency of the external power source, the power supply control unit 46 connects the circuit breaker 42 that has been in the disconnected state to the connected state. In addition, the circuit breaker 114 that has been in the cut-off state is brought into a connected state by remote control, and after the breaker 42 and the breaker 114 are brought into a connected state, the breaker 104 that has been in the connected state is turned off by remote control. As described above, the power supply source is switched.

  In the ship 100, the operation of the inboard power generation device 102 is stopped after the switching.

  On the other hand, when switching the power supply source used in the ship from the external power source to the inboard power generation device 102, the power supply control unit 46 uses the power generation control device 105 to determine the power generation frequency of the inboard power generation device 102 detected by the power generation frequency detection means. The frequency of the external power source detected by the external power source frequency detecting means is acquired, and the power generation frequency of the inboard power generation apparatus 102 is controlled remotely by comparing the power generation frequencies of the two, and the inboard power generation apparatus 102 generates power. The generated power generation frequency is set to be slightly higher than the power supply frequency of the external power supply.

  Then, if the power generation frequency generated by the inboard power generation device 102 is slightly higher than the power supply frequency of the external power source, the power feeding control unit 46 connects the circuit breaker 104 that has been in the disconnected state by remote control. Then, after setting the circuit breaker 104 to the connected state, the circuit breaker 114 that has been in the connected state is switched to the disconnected state by remote control, and the power supply source is switched.

  Furthermore, while comparing the phase of the onboard power generation device 102 detected by the power generation phase detection means and the phase of the external power supply P detected by the external power supply phase detection means by the power supply control unit 46, each phase is matched with each other. If switching (switching from inboard power generation device 102 to external power supply or switching from external power supply to inboard power generation device 102) is performed, smoother switching is performed so that the waveform of power supplied to the ship is not disturbed. Can do.

  Further, if each switching is performed when the voltage of the inboard power generation apparatus 102 and the voltage of the external power supply substantially coincide with each other, switching can be performed more smoothly.

  In FIG. 1, only one winding cable 14, 22, and cable 51, 52 is shown for each of the land-side cable reel device 12 and the ship-side cable reel device 20. Depending on the case, a plurality of these may be provided in parallel. In the case where a plurality of reels are provided, the reels can be arranged in a line so that the rotation center axes of the reels coincide with each other, and the reels can be rotationally driven by one driving device, thereby simplifying the reel configuration. be able to.

  In addition, the power supply control unit 46 and the power generation control device 105 are connected by a signal line, and transmission of information between them is performed by wired communication. Instead, the power supply control unit 46 and the power generation control are performed. A wireless communication device may be connected to the device 105 to transmit information by wireless communication.

  Next, control when an abnormality occurs in the external power supply P or the like will be described.

  For example, the power supply control unit 46 of the ship power supply apparatus 10 includes an external power supply abnormality detection means (not shown) capable of detecting an abnormality of the external power supply P via the winding cable 14, the cable 51, the optical converter 61 and the PLC 62. In the state in which power is supplied from the external power supply P, when it is detected that an abnormality has occurred in the external power supply P, the operation of the onboard power generator 102 is started and the power supply is received from the external power supply P. Control is performed to switch the received power from the inboard power generation device 102.

  Further, for example, the power supply control unit 46 of the ship power supply device 10 is provided with a power generation device abnormality detection means (not shown) capable of detecting an abnormality of the inboard power generation device 102. Abnormal signal output means (not shown) is provided for outputting a signal for operating a P protection circuit (not shown) to the external power supply P via a signal line.

  Furthermore, when the feed amount detectors 17 and 28 detect that the amount of extension of the winding cables 14 and 22 exceeds a predetermined value when receiving power from the external power source P, the power feeding control unit 46 performs control to switch the electric power received from the external power source P so as to be received from the inboard power generation device 102.

  Next, regarding the operation (switching method) for switching the power supply source used in the ship from the inboard power generation apparatus 102 to the external power source, immediately after the ship 100 comes in contact with the quay Q and the ship power supply apparatus 10 stops at a predetermined position. The state will be described.

  First, the land-side operator rotates the reel of the land-side cable reel device 12 by remote control to extend the take-up cable 14 until the plug 11 reaches the socket 1, and the plug 11 is inserted into the socket 1. Plug in.

  Subsequently, while the power supply control unit 46 sets both the circuit breaker 42 and the circuit breaker 114 in the disconnected state, the operator on the ship side makes the movable arm 36 of the cable crane 32 face the ship side by remote control, and then the ship side cable. The reel 24 of the reel device 20 is rotated, the winding cable 22 is extended until the plug 21 reaches the power receiving terminal 110, and the plug 21 is inserted into the power receiving terminal 110.

  In the case where the take-up cable 22 is pulled up using a crane (not shown) installed on the ship side without installing the cable crane 32, the operator on the ship side operates the crane by remote control and winds it with the crane. While pulling up the take-up cable 22, the reel of the ship side cable reel device 20 is rotated to extend the take-up cable 22, and the take-up cable 22 is pulled up until the plug 21 reaches the power receiving terminal 110. Plug in.

  Subsequently, the power supply control unit 46 controls the number of revolutions of the prime mover of the inboard power generation apparatus 102 so that the power generation frequency of the inboard power generation apparatus 102 is slightly lower than the power supply frequency of the external power supply P. The circuit breakers 42 and 114 that have been in the cut-off state are set in a connected state, and after the connection state is set, the circuit breaker 104 that has been in the connected state is switched to the cut-off state by remote control.

  Next, the operation (switching method) when switching the power supply source used in the ship from the external power supply (land power supply P) to the ship power generation apparatus 102 will be described.

  First, when the power supply source is an external power supply, the power supply control unit 46 operates the inboard power generation device 102 via the power generation control unit, controls the number of revolutions of the prime mover of the inboard power generation device 102, and the inboard power generation device 102. After the power generation frequency of the power generator is slightly higher than the power supply frequency of the external power supply P, the circuit breaker 104 that has been in the cut-off state is connected by remote control, Then, the circuit breakers 104 and 114 that are in the connected state are switched to the disconnected state.

  Subsequently, the operator on the ship side pulls out the plug 21 from the power receiving terminal 110, rotates the reel 24 by remote control, winds up the winding cable 22, pulls up the plug 21 to a predetermined height, and moves the movable arm 36 upright. Evacuate from the ship side. When the take-up cable is lowered using a crane installed on the ship side without installing the cable crane 32, the ship-side operator operates the crane by remote control and lowers the take-up cable 22 with the crane. Then, the reel 24 is rotated to wind the winding cable 22.

  On the land side, the land-side operator removes the plug 11 from the socket 1, rotates the reel 15 by the remote control, and winds the winding cable 14.

  As described above, according to the ship power supply apparatus and the ship power supply switching method according to the first embodiment of the present invention, the power supply source used in the ship is changed from the ship power generation apparatus 102 to the external power supply P (land power supply). Alternatively, it is possible to switch from the external power source P to the inboard power generation device 102 without a power failure. In addition, since the power supply source can be switched without a power failure, the electrical equipment used in the ship can be continuously used without any trouble even at the time of switching.

  Further, when power is not supplied from the external power source P, the winding cables 14 and 22 can be wound and stored by the reels 15 and 24, so that the winding cables 14 and 22 do not get in the way. .

  In addition, the ship power supply apparatus 10 is newly provided for the ship 100 including the inboard power generation apparatus 102, and can be applied to existing and new ships.

  Note that when the ship 100 is anchored at the port (when the ship 100 is berthed at the quay Q), power can be supplied from the onshore external power supply P. There is no need to operate, no noise or exhaust gas is emitted from the inboard power generation device 102, and environmental deterioration around the harbor can be prevented.

  Further, since switching is performed with the power generation frequency of the inboard power generation apparatus 102 lower than the power supply frequency of the external power supply P, the backflow of current from the inboard power generation apparatus 102 to the external power supply P can be prevented.

  Furthermore, when switching the electric power received from the onboard power generation device 102 to be received from the external power source P via the winding cable 22, the speed of the diesel engine of the onboard power generation device 102 is controlled to be gradually decreased. Since the power generation frequency of the inboard power generation device 102 is slightly lower than the power supply frequency of the external power supply P, the frequency of the power supplied from the inboard power generation device 102 to the inboard main bus 106 may change rapidly. Therefore, it is possible to prevent an overcurrent from flowing through the inboard main bus 106 and other devices connected thereto.

  Moreover, by using the ship-side cable reel device 20 and the cable crane 32 in combination, a separate cable is prepared as before, and this cable is wired using a crane (not shown) installed on the ship or quay Q. There is no need to extend the winding cable 22 from the reel 24 and connect it to the power receiving terminal 110 of the ship 100. Therefore, the winding cable 22 can be installed (wired) easily.

  In addition, when it is detected that an abnormality has occurred in the external power supply P in a state where power is being supplied from the external power supply P, the operation of the onboard power generator 102 is started and the power received from the external power supply P is Since switching is automatically performed so as to be received from the onboard power generation apparatus 102, a power failure in the ship 100 can be prevented even if an abnormality occurs in the external power source P and power supply becomes impossible.

  In addition, when an abnormality in the onboard power generation device 102 is detected, a signal for operating the protection circuit for the external power supply P is output to the external power supply P. Can be prevented in advance.

  Furthermore, the signal lines used for communication between the power supply control unit 46 and the external power supply and between the power supply control unit 46 and the power generation control device 105 are provided integrally with the winding cables 14 and 22. When the winding cables 14 and 22 are installed, the signal line can also be installed, and it is not necessary to separately install the signal line.

  Further, when the plug 11 at the tip of the winding cable 14 is connected to the socket 1 of the external power source P provided on the quay Q, the signal line is also connected. There is no need to make a separate connection, and the situation of forgetting to connect the signal line can be avoided. Similarly, when the plug 21 at the tip end of the winding cable 22 is connected to the power receiving terminal 110 of the ship 100, the signal line is also connected. Therefore, it is necessary to separately connect the signal line. It is possible to avoid a situation in which the connection of the signal line is forgotten.

  Further, when it is detected that the amount of extension of the winding cables 14 and 22 exceeds a predetermined value, the rotation of the driving devices 16 and 26 of the reels 15 and 24 is stopped. It is possible to prevent the winding cables 14 and 22 from being damaged due to excessive amounts.

  Further, in order to facilitate the installation (extension from the reels 15 and 24) and removal (winding onto the reels 15 and 24) of the winding cables 14 and 22, the reels 15 and 24 are driven by remote control operation. In other words, in other words, since the operator may operate the reels 14 and 24 at a position away from the reels 15 and 24, the amount of extension of the winding cables 14 and 22 from the reels 15 and 24 can be reduced. It is difficult for the operator to confirm from time to time.

  However, as described above, when it is detected that the amount of extension of the winding cables 14 and 22 exceeds a predetermined value, the rotation of the driving devices 16 and 26 of the reels 15 and 24 is stopped. Even if it is difficult to see the extended state of the take-up cable, it is possible to prevent the take-up cables 14 and 22 from being damaged due to an erroneous operation by the operator.

  Further, when it is detected that the amount of extension of the winding cables 14 and 22 exceeds a predetermined value when receiving power from the external power source P, the power feeding control unit 46 receives from the external power source P. The power to be received is switched so as to be received from the onboard power generation apparatus 102.

Therefore, when the power is supplied from the external power source P for some reason, the ship 100 is separated from the quay Q by a predetermined distance. For example, the plug 11 at the tip of the winding cable 14 is connected to the quay Q. Even if a situation where the socket 1 is disconnected occurs, the power supply to the ship 100 can be continuously performed by uninterruptible switching.
If it is detected that the amount of extension of the winding cable 14 exceeds a predetermined value while receiving power from the external power source P, an alarm device is used under the control of the power supply control unit 46. An alarm may be issued and the main circuit breaker may be shut off.

  Further, when it is detected that the amount of extension of the winding cable 14 exceeds a predetermined value while receiving power from the external power supply P, a protection circuit for the external power supply P is connected via the signal line. You may make it output the signal for operating to the external power supply P from the electric power feeding control part 46. FIG. If the protection circuit of the external power supply P is activated to stop the supply of power from the external power supply P, even if the take-up cable 14 is disconnected, the trouble due to the disconnection of the take-up cable 14 is The possibility of occurring in P can be avoided.

  Next, a second embodiment of the present invention will be described.

  FIG. 2 is a diagram showing a schematic configuration of the ship power supply device according to the second embodiment of the present invention, and shows a case where the power supply voltage of the ship 100 is a 400 V class low voltage system. The ship power supply device 10 according to the present embodiment includes a transformer 60 that transforms the voltage (6600 V) of the external power source to the voltage (400 V class) of the inboard power generation device 102 between the power receiving panel 41 and the shipside cable reel device 20. Prepare. Other configurations are the same as those of the ship power supply apparatus 10 according to the first embodiment described above. The operation (switching method) when switching the power supply source of the ship from the inboard power generation apparatus 102 to the external power supply and when switching from the external power supply to the inboard power generation apparatus 102 is the same as described in the first embodiment. It is.

  According to the second embodiment of the present invention, the same effect as that of the first embodiment described above can be obtained. Further, according to the second embodiment of the present invention, since the transformer 60 is provided when the power supply voltage in the ship is a 400V class low voltage system, the voltage (6600V) of the onshore power supply P that is an external power supply is supplied to the ship power generator. Since the voltage is transformed to 102 (400V class), the power supply cable 14 has a small current for the high voltage system (1/15 or less of the low voltage system), and a relatively small diameter and light weight can be used. The power supply cable 14 can be easily routed and wired between the ship and the quay in a short time.

  In the second embodiment, an electric circuit that passes through the transformer 60 and an electric circuit that bypasses the transformer 60 and directly connects the cable 52 and the power receiving panel 41 are provided separately, and a combination of an electric circuit changeover switch or a plurality of circuit breakers is provided. By providing an electric circuit switching means (not shown) that can selectively switch the electric circuits, it may be possible to cope with both the high voltage system and the low voltage system.

  In the first embodiment, the transformer 60 can be installed in advance. When the power supply voltage in the ship is a high voltage system, the cable 52 and the power receiving panel 41 are directly connected. The transformer 60 may be connected between them. By comprising in this way, most ship power supply devices 10 can be shared.

  Next, a third embodiment of the present invention will be described.

  FIG. 3 is a diagram showing a schematic configuration of the ship power supply apparatus 10 according to the third embodiment of the present invention, and shows a case of a high voltage system in which the power supply voltage of the ship 100 is 6600V. The marine power supply apparatus 10 according to the present embodiment omits the land-side cable reel apparatus 12 in the first embodiment, and includes a power generation apparatus 70 that functions as an external power supply instead. The power generation device 70 is connected to the power receiving panel 41 by a cable 72 having a socket 71 that can be inserted into the plug 44 of the power receiving panel 41 provided at the tip. In the present embodiment, the optical converter 61 and the PLC 62 are omitted. Other configurations are the same as those of the ship power supply apparatus 10 according to the first embodiment described above.

  In FIG. 3, the ship power supply device 10 is stopped on the opposite side of the quay Q across the ship 100.

  The power generation device 70 can be constituted by, for example, a micro gas turbine power generation device. The micro gas turbine has a feature that generation of nitrogen oxides and soot can be significantly reduced compared to diesel or the like.

  Next, regarding the operation (switching method) in the case where the power supply source used in the ship is switched from the inboard power generation apparatus 102 to the power generation apparatus 70 that is an external power source, the ship 110 contacts the quay Q and the ship power supply apparatus 10 is connected to the ship. The state immediately after stopping at a predetermined position on the opposite side of the quay Q across 100 will be described.

  First, while the power feeding control unit 46 puts both the circuit breaker 42 and the circuit breaker 114 in the disconnected state, the ship side operator makes the movable arm 36 of the cable crane 32 face the ship side by remote control, and then the ship side cable reel. The reel of the device 20 is rotated, the winding cable 22 is extended until the plug 21 reaches the power receiving terminal 110, and the plug 21 is inserted into the power receiving terminal 110.

  When the take-up cable 22 is pulled up using a crane installed on the ship side without installing the cable crane 32, the ship-side operator operates the crane by remote control and pulls up the take-up cable 22 with the crane. However, the reel 24 of the ship side cable reel device 20 is rotated to extend the winding cable 22, the winding cable 22 is pulled up to a place where the plug 21 reaches the power receiving terminal 110, and the plug 21 is inserted into the power receiving terminal 110.

  Subsequently, the power supply control unit 46 controls the number of revolutions of the prime mover of the inboard power generation device 102 so that the power generation frequency of the inboard power generation device 102 is slightly lower than the power supply frequency of the power generation device 70 that is an external power source. In this case, the circuit breakers 42 and 114 that have been in the cut-off state are set in the connected state, and after the connection state is set, the circuit breaker 104 in the connected state is set in the cut-off state by remote control to perform switching.

  Next, an operation (switching method) when the power supply source used in the ship is switched from the power generation apparatus 70 as an external power source to the inboard power generation apparatus 102 will be described.

  First, when the power supply source is an external power supply (power generation device 70), the power supply control unit 46 operates the inboard power generation device 102 via the power generation control unit, and controls the rotational speed of the prime mover of the inboard power generation device 102. The power generation frequency generated by the inboard power generation apparatus 102 is slightly higher than the power supply frequency of the external power source P, and the circuit breaker 104 that has been in the disconnected state is connected by remote control. After the connection state, the circuit breakers 42 and 114 that have been in the connected state are switched to the disconnected state.

  Subsequently, the operator on the ship side pulls out the plug 21 from the power receiving terminal 110, rotates the reel 24 by remote control, winds up the winding cable 22, pulls up the plug 21 to a predetermined height, and moves the movable arm 36 upright. As evacuated from the ship 100. When the take-up cable 22 is lowered using a crane installed in the ship 100 without installing the cable crane 32, the ship-side operator operates the crane by remote control, and the take-up cable 22 is moved by the crane. While being lowered, the reel 24 is rotated to wind up the winding cable 22.

  According to the third embodiment of the present invention, since the power generation device 70 is mounted on the floating body 8 as an external power source, installation work such as the socket 1 and the cable P3 on the quay Q is not required.

  Further, by using a low-pollution micro gas turbine power generation device as the power generation device 70, it is possible to prevent the surrounding environment from deteriorating.

  Also in the third embodiment, the same effects as described in the first embodiment can be obtained with respect to the parts common to the first embodiment.

  In addition, when the power supply voltage of the ship 100 is a 400V class low voltage system, it is good also as a structure provided with the transformer 60 demonstrated in 2nd Embodiment in the electric power feeding generator 10 which concerns on 3rd Embodiment. In this case, an electric circuit that passes through the transformer 60 and an electric circuit that bypasses the transformer 60 and directly connects the cable 52 and the power receiving panel 41 are provided separately, and each electric circuit is connected by a combination of an electric circuit changeover switch or a plurality of circuit breakers. By providing electric path switching means (not shown) that can be selectively switched, it may be possible to cope with both for the high voltage system and the low voltage system.

  Next, in the above-described first to third embodiments, another method for pulling up the winding cable 22 when the plug 21 of the winding cable 22 is connected to the power receiving terminal 110 of the ship 100 will be described.

  FIG. 4 shows a state in which the winding cable 22 is being pulled up. As shown in FIG. 4, a drive pulley 81 that is rotationally driven by a motor 82 is installed at the end of the ship 100 on the floating body 8, and the side of the ship close to the ship power supply device 10 on the upper deck 108, for example. In addition, a rotatable driven pulley 83 is installed.

  Next, the endless wire 84 placed on the ship 100 is thrown down onto the floating body 8 by the ship side operator, and the endless wire is moved to the driven pulley and the drive pulley by the ship side operator and the floating side operator. Hang over. The endless pulley 84 is provided with a plurality of hooks 85 that can hook the winding cable 22 of the shipside cable reel device 20.

  Subsequently, the operator on the floating body hooks the take-up cable 22 on the hook 85 and then operates the drive pulley 81 to rotate the drive pulley 81 and rotate the reel 24 of the ship-side cable reel device 20 to wind. The take-up cable 22 is extended, and the take-up cable 22 is pulled up until the plug 21 reaches the power receiving terminal 110 of the ship 100. Then, the ship-side operator inserts the plug 21 into the power receiving terminal 110.

  After the lifting of the winding cable 22 is finished, the floating-side operator removes the endless wire 84 from the drive pulley 81, and the ship-side operator pulls up the endless wire 84 and collects it.

  According to this method, since it is not necessary to install the cable crane 32 on the floating body 8 or to install the crane on the ship 100 in order to pull up the winding cable 22, it is necessary to pull up the winding cable 22 to the ship side. Equipment is simplified.

  It should be noted that the technical scope of the present invention is not limited to the above-described embodiment, and it is needless to say that various modifications can be made without departing from the gist of the present invention.

1 is a diagram showing a schematic configuration of a marine power supply device according to a first embodiment of the present invention. It is a figure which shows schematic structure of the ship electric power feeder which concerns on 2nd Embodiment of this invention. It is a figure which shows schematic structure of the ship electric power feeder which concerns on 3rd Embodiment of this invention. It is a figure explaining the method of pulling up a winding cable. It is a figure explaining a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Socket 5a-5g, 6a Signal line 8 Floating body 10 Ship power supply device 11 Plug 12 Land side cable reel device 14 Winding cable 15 Reel 16 Drive device 17 Reel amount detector 18 Reel control device 20 Land side cable reel device 21 Plug 22 Winding cable 24 Reel 26 Drive device 28 Feed amount detector 30 Reel control device 32 Cable crane 34 Main body frame 36 Movable arm 40 Power supply switching means 41 Power receiving panel 42 Circuit breaker 43 Internal cable 44, 45 Plug 46 Power supply controller 51, 52 Cable 54, 55 Socket 60 Transformer 70 Power generation device 71 Socket 72 Cable 81 Drive pulley 82 Motor 83 Driven pulley 84 Endless wire 85 Hook 100 Ship 102 Inboard power generation device 103 Governor 104 Breaker 106 Inboard main bus 108 Upper deck 110 Power receiving terminal 112 Inboard cable 114 Circuit breaker 116 Power supply line P Onshore power supply P3 Cable Q Quay

Claims (10)

A ship power supply device that supplies power from an external power source to a ship equipped with an inboard power generation device for supplying power to be used in the ship,
A floating body floating on the water,
A land-side cable reel device that is installed in the floating body and has a winding cable that can be connected to a land power source that is the external power source, and can wind or unwind the winding cable;
A winding cable installed on the floating body, electrically connected to the land-side cable reel device, and connectable to a power receiving terminal provided on the ship to receive power from the external power source, A ship-side cable reel device having a winding cable for supplying power from an external power source to the ship and capable of winding or feeding the winding cable;
Power supply switching means installed on the floating body and capable of switching the power supply source used on the ship between the onboard power generation apparatus and the external power supply without any power failure,
A ship power supply device characterized by that. The floating body is installed, comprising a transformer for transforming the voltage of the external power supply voltage of the onboard power generating device, marine feed unit according to claim 1, characterized in that. The power switching means is
An external power source detecting means for detecting at least one of the power frequency and phase of the external power source;
Inboard power supply detection means for detecting at least one of the power supply frequency and phase of the inboard power generation device;
Matching means for matching at least one of the power frequency and phase of the inboard power generation device with the external power source,
Marine feed unit according to claim 1 or 2, characterized in that. The power switching means is
When switching the power supply source used in the ship from the inboard power generation device to the external power supply, the power generation frequency generated by the inboard power generation device is set lower than the power supply frequency of the external power supply by remote control. And perform the switching,
Marine feed unit according to claim 1 or 2, characterized in that. The power switching means is
A first circuit breaker for connecting or breaking an electric circuit connecting the land-side cable reel device and the ship-side cable reel device, and a power supply control unit for controlling at least the first circuit breaker,
The power supply control unit
When switching the power supply source used in the ship from the inboard power generation device to the external power source, by remotely controlling the number of revolutions of the prime mover of the inboard power generation device, the power generation frequency generated by the inboard power generation device, The power supply frequency of the external power supply is slightly lower than that, the first circuit breaker is connected, and the ship main bus for supplying power to the equipment in the ship is connected to the power receiving terminal. After the second circuit breaker for connecting or disconnecting the electric circuit is connected by remote control and the first circuit breaker and the second circuit breaker are connected, the inboard main bus and the ship power generator are The ship power supply device according to claim 4 , wherein the switching is performed by setting a third circuit breaker that connects or disconnects the electric circuit to be connected to a disconnected state by remote control. The switching means is
When switching the power supply source used in the ship from the external power supply to the inboard power generation device, the power generation frequency generated by the inboard power generation device is set higher than the power supply frequency of the external power supply by remote control. And perform the switching,
Marine feed unit according to claim 1 or 2, characterized in that. The power switching means is
A first circuit breaker for connecting or breaking an electric circuit connecting the external power source and the shipside cable reel device, and a power supply control unit for controlling at least the first circuit breaker,
The power supply control unit
When switching the power supply source used in the ship from the external power source to the inboard power generation device, remotely controlling the number of revolutions of the prime mover of the inboard power generation device, the power generation frequency generated by the inboard power generation device, A third circuit breaker that connects or disconnects an electric circuit that connects the ship main bus for supplying electric power to the equipment in the ship and the ship power generator, and is slightly higher than the power frequency of the external power supply. Is connected by remote control, and after the third circuit breaker is connected, a second circuit breaker that connects or disconnects the first circuit breaker and the electric circuit connecting the ship main bus and the power receiving terminal. The switching is performed as a shut-off state by remote control.
The marine power feeding device according to claim 6 . In a ship provided with an inboard power generation device for supplying electric power to be used in a ship, a power feeding switching method for a ship that switches the power supply source used in the ship from the inboard power generation apparatus to an external power source,
A land-side cable reel device that has a winding cable that can be connected to a land power source that is the external power source on a floating body that floats on water, and that can wind or unwind the winding cable; A take-up cable that is connected to a power receiving terminal provided in the ship for receiving power from the external power source and that supplies power from the external power source to the ship A ship-side cable reel device capable of winding or unwinding the take-up cable, and a power source switching means capable of switching the power source used in the ship from the in-board power generator to the external power source without interruption And using a ship power supply device equipped with
Connecting the cable of the land-side cable reel device to the external power source;
A first circuit breaker for connecting or blocking an electric circuit connecting the land-side cable reel device and the ship-side cable reel device; While both the second circuit breakers to be connected or disconnected are in a disconnected state, the winding cable of the ship side cable reel device is connected to the power receiving terminal,
The first circuit breaker is configured by remotely controlling the number of revolutions of the prime mover of the inboard power generation device so that the power generation frequency generated by the inboard power generation device is slightly lower than the power supply frequency of the external power source. , The second circuit breaker is connected by remote control, the first circuit breaker and the second circuit breaker are connected, and then the inboard main bus and the ship power generator The third circuit breaker that connects or disconnects the electric circuit connecting the two is set to the disconnected state by remote control, and the switching is performed.
Ship power supply switching method characterized by the above. A drive pulley that is driven to rotate by the floating body is installed, and a driven pulley that is rotatable by the ship is installed,
When the winding cable is connected to the ship, an endless wire is stretched between the driving pulley and the driven pulley, the winding cable is attached to the endless wire, and the driving pulley is rotated to rotate the winding pulley. Pull up the cable to the ship,
The ship power feeding switching method according to claim 8 . In a ship equipped with an inboard power generation device for supplying electric power to be used onboard and capable of receiving electric power from an external power source, the supply source of electric power used in the ship is transferred from the external power source to the inboard power generation device. A power supply switching method for a ship to be switched,
A land-side cable reel device that has a winding cable that can be connected to a land power source that is the external power source on a floating body that floats on water, and that can wind or unwind the winding cable; A take-up cable that is connected to a power receiving terminal provided in the ship for receiving power from the external power source and that supplies power from the external power source to the ship A ship-side cable reel device capable of winding or unwinding the take-up cable, and a power source switching means capable of switching the power source used in the ship from the in-board power generator to the external power source without interruption And using a ship power supply device equipped with
The first circuit breaker for connecting or blocking an electric circuit connecting the land-side cable reel device and the ship-side cable reel device in a state where the winding cable of the ship-side cable reel device is connected to the ship. And when both of the second circuit breaker for connecting or disconnecting the electric circuit connecting the main bus for supplying power to the equipment on the ship and the power receiving terminal connected to the ship are in a connected state,
By remotely controlling the number of revolutions of the motor of the inboard power generation device, the power generation frequency generated by the inboard power generation device is set slightly higher than the power supply frequency of the external power source, and the inboard main bus and the The third circuit breaker that connects or disconnects the electric circuit connecting the ship power generation device is brought into a connected state by remote control, and after the third circuit breaker is brought into a connected state, the first circuit breaker is brought into a cut-off state. The second circuit breaker is switched off by remote control, and the switching is performed.
Ship power supply switching method characterized by the above.

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