JP2006027536A - Vessel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vessel furnished with a generating unit to supply electric power for its own use, capable of receiving supply of electric power from an outside electric power source and capable of facilitating change-over work of supply source of the electric power with no interruption of power supply in changing the supply source of the electric power source. <P>SOLUTION: This vessel 1 furnished with the generating unit to supply the electric power to use in itself and capable of receiving the supply of the electric power from the outside electric power source has a reel 23 capable of taking up or paying out a cable 21 to receive the supply of the electric power from the outside electric power source P by rotating and an electric power source change-over means 51 capable of changing with no interruption of the power supply in changing it over so as to receive the electric power having been received from the generating unit 3 to the outside electric power source through the cable 21. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a ship having a power generation device for supplying power to be used by itself and capable of receiving power from an external power source, and in particular, winding a cable for connecting to the external power source. The present invention relates to a reel that can be stored and that can be switched power without interruption.

  2. Description of the Related Art Conventionally, there has been known a ship that includes a power generation device for supplying electric power used by itself and that can be supplied with electric power from an external power source (land power source) installed on land.

  FIG. 2 is a diagram illustrating a schematic configuration of a conventional ship 100.

  The conventional ship 100 includes a power generation device 102, and the power generation device 102 is electrically connected to a main bus 106 for supplying power to other devices of the ship 100 via a circuit breaker 104. It has come to be.

  For example, the upper deck 108 of the conventional ship 100 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. It has become. Further, a breaker 114 is provided at an intermediate portion of the inboard cable 112.

  When power is supplied from the onshore power supply facility, a cable 118 connects the power receiving terminal 110 installed on the conventional ship 100 and the onshore power supply terminal 116 installed on the quay. At the same time, the circuit of the circuit breaker 104 (the circuit breaker between the main bus 106 and the power generator 102) is opened and the circuit of the circuit breaker 114 (the circuit breaker between the main bus 106 and the external power source) is closed. I am doing so.

As a technique related to the conventional technique, for example, a technique described in Patent Document 1 is known.
JP 2001-309553 A

  By the way, although it depends on the amount of electric power used in the ship, the cable 118 generally has a large diameter and a large mass. Therefore, in the conventional ship 100, the cable 118 prepared on the ship 100 or the quay has to be wired using a crane (not shown) installed on the ship 100 or the quay, and the cable There is a problem that it takes a lot of man-hours to install 118.

  In addition, when the power source used by the ship 100 is switched from the power generation device 102 to the external power source after the cable 118 is wired, the circuit circuit of the circuit breaker 114 is closed after the circuit circuit of the circuit breaker 104 is opened. There is a problem that power is not supplied to the main bus 106 and a power failure occurs once in the ship 100.

  The present invention has been made in view of the above problems, and includes a power generation device for supplying power used by itself and a power source capable of receiving power supply from an external power source. An object of the present invention is to provide a ship that can be switched easily and without interruption when switching the supply source.

  The invention according to claim 1 is provided with a power generation device for supplying electric power to be used, and in a ship that can be supplied with electric power from an external power source, by rotating the electric power from the external power source. When switching so that the cable for receiving the supply of power can be wound or extended, and the power received from the power generation device is received from the external power source via the cable, switching can be performed without power failure. It is a ship having a power supply switching means capable.

  The invention according to claim 2 is the marine vessel according to claim 1, wherein the power source switching means sets the power generation frequency generated by the power generation device to be lower than the power source frequency of the external power source. It is a ship which is a means for performing the switching.

  According to a third aspect of the present invention, there is provided a marine vessel according to the second aspect, wherein a main bus provided in the marine vessel, the cable, and the main marine are provided to supply power to the equipment installed in the marine vessel. A first circuit breaker provided at an intermediate portion or an end portion of an inboard cable that connects the busbars to each other, and an intermediate portion or an end portion of the power supply line that connects the power generation device and the main busbar to each other And the power switching means switches the power received from the power generator so as to be received from the external power source via the cable, the rotational speed of the prime mover of the power generator The power generation frequency generated by the power generation device is slightly lower than the power supply frequency of the external power source, and the electric circuit of the first circuit breaker is closed, The first shield After closing the vessel electric path, a ship is a means for opening said second circuit breaker path.

  The invention according to claim 4 includes a power generator for supplying electric power to be used, and in a ship capable of receiving electric power from an external power source, by rotating the electric power from the external power source. When switching the reel that can wind or extend the cable for receiving the supply of power and the power received from the external power source via the cable so as to be received from the power generator, the power is switched uninterrupted It is a ship which has the power supply switching means which can do.

  The invention according to claim 5 is the ship according to claim 4, wherein the power supply switching means sets the power generation frequency generated by the power generation device to be higher than the power supply frequency of the external power source, It is a ship which is a means for performing the switching.

  According to a sixth aspect of the present invention, there is provided a marine vessel according to the fifth aspect, wherein a main bus provided in the marine vessel, the cable, and the main marine vessel are provided to supply power to the equipment installed in the marine vessel. A first circuit breaker provided at an intermediate portion or an end portion of an inboard cable that connects the busbars to each other, and an intermediate portion or an end portion of the power supply line that connects the power generation device and the main busbar to each other A second circuit breaker, and when the power switching means switches the power received from the external power source via the cable to be received from the power generator, the rotation of the prime mover of the power generator The power generation frequency generated by the power generation device is slightly higher than the power supply frequency of the external power source by controlling the number with a governor, the electric circuit of the second circuit breaker is closed, and the second circuit breaker is closed. Close the circuit breaker circuit After a ship is means for opening said first circuit breaker path.

  According to a seventh aspect of the present invention, in the ship according to any one of the first to sixth aspects, an external power supply abnormality detecting means capable of detecting an abnormality of the external power supply via a signal line; When it is detected that an abnormality has occurred in the external power supply in a state where power is being supplied from the power supply, the operation of the power generator is started and the power received from the external power supply via the cable is And a power supply switching control means for controlling the power supply switching means to receive from the power generator.

  The invention according to claim 8 is the ship according to any one of claims 1 to 7, wherein the power generation apparatus abnormality detection means capable of detecting the abnormality of the power generation apparatus, and the abnormality is detected. It is a ship which has the abnormal signal output means which outputs the signal for operating the protection circuit of the said external power supply to the said external power supply via a signal wire | line.

  The invention according to claim 9 is the ship according to claim 7 or claim 8, wherein the signal line is integrated with the cable.

  A tenth aspect of the present invention is the ship according to any one of the first to ninth aspects, wherein the cable extension amount detecting means capable of detecting the extension amount of the cable from the reel, and the A ship having reel control means for stopping the rotation of the actuator of the reel when detecting that the extension amount of the cable exceeds a predetermined value.

  Invention of Claim 11 has the cable extension amount detection means which can detect the extension amount of the said cable from the said reel in the ship of any one of Claims 1-10. When it is detected that the extension amount of the cable exceeds a predetermined value when receiving power from the external power source, the power source switching control means, the power received from the external power source, It is the ship which is a means to switch so that it may receive from the said electric power generating apparatus.

  According to the present invention, when a power supply source is switched in a ship having a power generation device for supplying power to be used by itself and capable of receiving power supply from an external power supply, the switching work is performed. There is an effect that it is easy and can be switched without interruption.

  FIG. 1 is a diagram illustrating a schematic configuration of a ship 1 according to an embodiment of the present invention and a state in which the ship 1 is in contact with a quay Q. FIG. 1 is a view of the ship 1 as viewed from the front to the rear of the ship 1.

  The ship 1 includes an appropriate number of power generation apparatuses 3 for supplying power used by the ship 1 and is configured to be able to receive power supply from the external power source P.

  The ship 1 is assumed to be a passenger ship or a container ship for carrying frozen cargo that consumes more electricity than other ships, and the external power source P is installed on land, for example. It is assumed that the power generation equipment of the power station is.

  First, each apparatus for supplying electric power from the said power generator 3 to the said ship 1 is demonstrated.

  The power generator 3 includes a power generator 5 that can be driven by a prime mover such as a diesel engine 7 to generate power.

  The diesel engine 7 is provided with a governor 9, and the governor 9 can adjust the rotational speed of the diesel engine 7 under the control of the control device 11. By adjusting the rotational speed of the diesel engine 7, the power generation frequency and phase of electricity output from the generator 5 (power generation device 3) can be controlled.

  The ship 1 is provided with a main bus 13, and power is supplied to equipment (for example, lighting equipment, refrigeration equipment) installed in the ship 1 via the main bus 13. Yes.

  A circuit breaker 17 made of, for example, VCB (vacuum circuit breaker) is provided at an intermediate portion or an end portion of the power supply line 15 that connects the main bus 13 and the power generator 3 (generator 5). Under the control of the control device 11, power is supplied from the generator 5 to the main bus 13 (the ship 1) by opening and closing the circuit of the circuit breaker 17. Can be stopped.

  Next, each apparatus for supplying electric power from the external power source P to the ship 1 will be described.

  A socket P1, which is an example of a connection terminal of the external power source P, is installed in a portion of the quay Q close to the sea (for example, the upper surface of the quay Q and the end on the sea side). The socket P1 is connected to the external power source P via a cable P3 wired in the ground of the quay Q.

  By installing the socket P1 and the cable P3 as described above, there is no interference between the container crane for carrying cargoes such as containers in and out of the ship 1 and the cable P3, and the container crane is attached to the quay Q. Easy to install.

  The ship 1 is provided with a reel 23 that can wind or extend a cable 21 for receiving power from the external power source P by being rotated by an actuator such as an electric motor 19. A plug 25, which is an example of a connection terminal on the ship 1 side, is provided at the tip of the cable 21.

  The reel 23 is a gutter on the side that comes into contact with the quay Q, and is provided on the upper side of the ship 1. In other words, by extending the cable 21 from the reel 23, the plug 25 provided at the tip of the cable 21 is installed at the installation location of the socket P 1 of the external power source P installed on the quay Q. The reel 23 is provided at a position where it can easily reach this vicinity.

  More specifically, the rotation center axis of the reel 23 extends in the front-rear direction of the ship 1, and the reel 23 rotates in a predetermined direction, so that the cable 21 is connected to the quay Q side. It is designed to extend downward.

  Further, a guide member 27 is provided in the vicinity of the reel 23 and in a portion where the cable 21 extends so that the cable 21 can be smoothly extended and wound.

  Then, by rotating the reel 23 and extending the cable 21, the cable 21 is extended as shown by a two-dot chain line in FIG. 1, and the plug 25 reaches the socket P1.

  After the plug 25 reaches the socket P1, the operator connects the plug 25 to the socket P1.

  Further, the ship 1 is provided with a power receiving panel 29 having a plug 31, and a socket 35 provided at the tip of another cable 33 extending from the reel 23 is connected to the plug 31. By doing so, electric power can be supplied from the external power source P to the power receiving panel 29.

  The cable 33 is a different cable from the cable 21 wound around the reel 23, so that it does not extend from the reel 23 due to the rotation of the reel 23 and is not wound around the reel 23. It has become. The cable 21 and the other cable 33 are electrically connected to each other via a slip ring or the like provided on the reel 23.

  A breaker 39 made of, for example, VCB is provided in the middle of the inboard cable 37 for connecting the plug 31 (each of the cables 21 and 33) and the main bus 13 and inside the power receiving panel 29. A circuit breaker 41 is provided in series with the circuit breaker 39 on the side of the main bus 13 which is an intermediate portion of the inboard cable 37.

  Then, under the control of the control device 11, the main circuit 13 (the ship 1 is connected to the external power source P via the cables 21, 33, etc. by opening and closing the electric circuit of the circuit breakers 39, 41. ), And the power supply can be stopped.

  The circuit breakers 39 and 41 may be installed at the end of the inboard cable 37. Moreover, since VCB is adopted as the circuit breaker, it is possible to reliably cut off even a high voltage (for example, a voltage of 6600 V).

  Further, in FIG. 1, only one cable 21, 33 and one inboard cable 37 are shown, but a plurality of cables 21, 33 and a plurality of inboard cables 37 are provided depending on the amount of power used in the ship 1. A plurality of reels 23 and circuit breakers 39 and 41 may be provided in parallel. When a plurality of reels 23 are provided, the reels are arranged side by side so that the rotation center axes of the reels coincide with each other, and are driven to rotate by one electric motor 19, thereby simplifying the reel configuration. can do.

  Next, the reel 23 will be described in more detail.

  The reel 23 is driven to rotate by remote control. That is, under the control of the motor controller 43, the electric motor 19 is rotationally driven by remote control, so that the reel 23 is rotated.

  Further, the reel 23 is provided with cable extension amount detecting means 45 capable of detecting the extension amount of the cable 21 from the reel 23, and the extension amount of the cable 21 exceeds a predetermined value. When this is detected, the rotation of the electric motor 19 of the reel 23 is stopped under the control of the motor controller 43.

  Next, signal lines connecting the ship 1 and the external power source P to each other will be described.

  The signal line is for transmitting information between the ship 1 and the external power source P, and is composed of, for example, an optical fiber.

  The signal line is provided integrally with the cables 21, 33, P1. That is, for example, the power supply line for supplying power and the optical fiber are provided in parallel with each other inside the outer sheath of each of the cables 21, 33, and P 1.

  When the plug 25 is inserted into the socket P1, the signal line provided on the cable 21 and the signal line provided on the cable P3 are connected to each other.

  Even when the socket 35 is inserted into the plug 31, the signal line provided on the cable 33 and the signal line provided on the plug 31 are connected to each other.

  The signal line is wired away from the power supply line inside the plug 31 (inside the power receiving panel 29), and the power supply line constitutes the inboard cable 37 as described above, and the circuit breaker. 39.

  On the other hand, the signal lines wired apart are connected to an optical converter 47 that can convert an optical signal into an electrical signal and an electrical signal into an optical signal. It is connected to the control device 11 via the PLC 49. Information can be exchanged between the control device 11 and the external power supply P (a protection circuit described later or a control device for the external power supply P).

  Next, power supply switching means 51 for switching the power supply source of the ship 1 will be described.

  The power source switching means 51 switches the power received by the ship 1 from the power generator 5 so that the ship 1 receives from the external power source P via the cables 21, 33, 37. When switching the power received by the ship 1 from the external power source P via the cables 21, 33, and 37 so that the ship 1 receives from the power generator 5, means capable of switching without power failure It is.

  More specifically, the switching means 51 includes, for example, a power generation frequency detection means (not shown) capable of detecting the power generation frequency of the power generation apparatus 3 and a power generation capable of detecting the phase of electricity generated by the power generation apparatus 3. Device phase detection means (not shown), external power supply phase detection means (not shown) capable of detecting the phase of the external power supply P, and external power supply frequency detection means (not shown) capable of detecting the power supply frequency of the external power supply Not shown).

  And when switching so that the electric power received from the said electric power generation apparatus 3 may be received from the said external power supply P via each said cable 21, 33, 37, the electric power generation frequency of the said electric power generation apparatus 3 detected by the said electric power generation frequency detection means and The control device 11 compares the power frequency of the external power source P detected by the external power frequency detection means, and controls the speed of the diesel engine 7 of the power generation device 3 to be gradually decreased by the governor 9. Thus, the power generation frequency generated by the power generation device 3 is made slightly lower than the power supply frequency of the external power supply P.

  As described above, the power generation frequency generated by the power generation device 3 is slightly lower than the power supply frequency of the external power supply P, and the open circuit circuits of the circuit breakers 39 and 41 are closed (power Is closed so as to be supplied from the external power source P to the main bus 13, and after closing the circuit of each of the circuit breakers 39, 41, the circuit of the circuit breaker 17 that has been closed is opened (the power is supplied to the power generator). 3 is opened so as not to be supplied from the main bus 13 to the main bus 13).

  After the switching, the operation of the power generator 3 (diesel engine 7) is stopped.

  On the other hand, when the electric power received from the external power source P via the cables 21, 33, 37 is switched to be received from the power generation device 3, the operation of the power generation device 3 is started, and the power generation frequency detection means While the control device 11 compares the power generation frequency of the power generation device 3 detected in step 3 and the power supply frequency of the external power supply P detected by the external power supply frequency detection means, the rotational speed of the diesel engine 7 of the power generation device 3 is compared. Is controlled by the governor 9 so that the power generation frequency generated by the power generation device 3 is slightly higher than the power supply frequency of the external power supply P.

  As described above, the power generation frequency generated by the power generation device 3 is set slightly higher than the power supply frequency of the external power supply P, the open circuit of the circuit breaker 17 is closed, and the circuit breaker 17 After the electric circuit is closed, the electric circuits of the circuit breakers 39 and 41 which have been closed are opened to perform switching.

  Further, the control device 11 compares the phase of the power generation device 3 detected by the power generation device phase detection means with the phase of the external power supply P detected by the external power supply phase detection means, and the respective phases are mutually compared. If the above switching is performed when they coincide, smooth switching can be performed so that the waveform of the power supplied to the ship 1 is not disturbed.

  Further, if the above switching is performed when the voltage of the power generation device 3 and the voltage of the external power supply P substantially match each other, smoother switching can be performed.

  If the power supply frequency of the external power supply P is known, the external power supply frequency detection means may be deleted.

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

  For example, the control device 11 of the ship 1 has an external power supply abnormality detection means (not shown) capable of detecting an abnormality of the external power supply P via signal lines provided in the cables 21, 33, P3. 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 power generator 3 starts operating and the cables Power supply switching control means (not shown) is provided for controlling the power supply switching means 51 so that the power received from the external power supply P is received from the power generation device 3 via 21, 33, and 37.

  Further, for example, the control device 11 of the ship 1 is provided with a power generation device abnormality detection means (not shown) capable of detecting an abnormality of the power generation device 3, and when the abnormality is detected, the external power source 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 the signal line.

  Furthermore, when the cable extension amount detection means 45 detects that the extension amount of the cable 21 exceeds a predetermined value when receiving power from the external power source P, the power supply switching means 51 is configured to switch the electric power received from the external power source P so as to be received from the power generation device 3.

  Next, the operation when the power source of the ship 1 is switched from the power generator 3 to the external power source P will be described.

  The state immediately after the ship 1 touches the quay Q will be described.

  First, the operator rotates the reel 23 by remote control, extends the cable 21 until the plug 25 reaches the socket P1, and inserts the plug 25 into the socket P1.

  Subsequently, the control device 11 performs control so that the rotational speed of the diesel engine 7 of the power generation device 3 is gradually decreased, so that the power generation frequency of the power generation device 3 is slightly lower than the power supply frequency of the external power source P. The electric circuit of each of the circuit breakers 39 and 41 that has been opened is closed so as to be low, and after this closing, the electric circuit of the circuit breaker 17 that has been closed is opened.

  Next, the operation when the power source of the ship 1 is switched from the external power source P to the power generator 3 will be described.

  First, the control device 11 operates the power generation device 3, controls the rotational speed of the diesel engine 7 of the power generation device 3, and the power generation frequency generated by the power generation device 3 is the power source of the external power source P. The circuit of the circuit breaker 17 that has been opened is closed so as to be slightly higher than the frequency. After the circuit is closed, the circuits of the circuit breakers 39 and 41 that have been closed are opened.

  Subsequently, the operator pulls out the plug 25 from the socket P1, rotates the reel 23 by remote control, and winds up the cable 21.

  According to the ship 1, the cable 23 for receiving power from the external power source P can be wound or extended by being rotated by the electric motor 19 and received from the power generator 3. When switching to receive power from the external power source P via the cable 21, the power source switching means 51 that can be switched without a power failure is provided. Is not required to be wired using a crane (not shown) installed on the ship or quay, and the cable 21 may be extended from the reel 23 and connected to the external power terminal P1 provided on the quay Q. Therefore, the installation (wiring) work of the cable 21 is simplified, the cable 21 can be easily installed, and the power source of the ship 1 can be turned off without power failure. It is possible to switch the supply source.

  Similarly, when the power received from the external power source P via the cable 21 is switched to be received from the power generation device 3, the cable 21 can be easily removed and can be uninterrupted. The power supply source of the ship 1 can be switched.

  That is, according to the ship 1, when switching the power supply source, the switching operation is easy and can be switched without power failure.

  In addition, since the power supply source can be switched without a power failure, the electrical equipment used in the ship 1 can be continuously used without any trouble even during the switching.

  Further, since the reel 23 is provided on the upper side of the ship 1 on the side of the berth where the reel 23 comes in contact with the quay Q, that is, by extending the cable 21 from the reel 23, the cable Since the reel 23 is provided in such a position that the plug 25 at the tip of the terminal 21 can easily reach the socket P1 of the external power source P installed on the quay Q, the installation work of the cable 21 is simple. It has become. Moreover, it is not necessary to separately provide a crane for installing a cable on a quay or a ship as in the past.

  Furthermore, when the power supply from the external power source P is not received, the cable 21 can be wound and stored by the reel 23, so that the cable 21 does not get in the way, and the external power source P When it is going to receive supply of electric power from, the said cable 21 can be extended immediately.

  In addition, when the ship 1 is anchored at the port (when the ship 1 is berthed at the quay Q), it is possible to receive power supply from the external power source P on the land, so the power generator 3 of the ship 1 is operated. There is no need to do so, no noise or exhaust gas comes out of the power generator 3, and environmental deterioration around the harbor can be prevented.

  Further, according to the ship 1, since the power generation frequency of the power generation device 3 is set lower than the power supply frequency of the external power source P, the switching is performed, so that the current from the power generation device 3 to the external power source P is changed. Backflow can be prevented.

  Further, according to the ship 1, when the electric power received from the power generation device 3 is switched to be received from the external power source P via the cable 21, the rotational speed of the diesel engine 7 of the power generation device 3 is gradually decreased. Thus, the power generation frequency of the power generation device 3 is slightly lower than the power supply frequency of the external power source P. Therefore, the frequency of the power supply supplied from the power generation device 3 to the main bus 13 is Therefore, it is possible to prevent an overcurrent from flowing through the main bus 13 and other devices connected thereto.

  Further, according to the ship 1, when it is detected that an abnormality has occurred in the external power supply P in a state where power is supplied from the external power supply P, the operation of the power generation device 3 is started, and Since the power received from the external power supply P is automatically switched so as to be received from the power generation device 3, even if an abnormality occurs in the external power supply P and the supply of power becomes impossible, a power outage on the ship 1 is prevented. Can be prevented.

  Further, according to the ship 1, when an abnormality of the power generation device 3 is detected, a signal for operating the protection circuit of the external power source P is output to the external power source P. It is possible to prevent a failure or trouble from occurring in the external power supply P.

  Furthermore, according to the ship 1, since the signal line is provided integrally with the cable, the signal line can be installed when the cable 21 is installed, and the signal line is installed separately. There is no need to do it.

  Further, when the plug 25 at the tip of the cable 21 of the reel 23 is connected to the socket P1 of the external power supply P provided on the quay, the signal line is also connected. It is not necessary to separately connect the lines, and the situation of forgetting to connect the signal lines can be avoided.

  Further, according to the ship 1, when it is detected that the extension amount of the cable 21 exceeds a predetermined value, the rotation of the electric motor 19 of the reel 23 is stopped, so that the extension amount of the cable 21 is excessive. Damage to the cable 21 can be prevented in advance.

  Also, in order to facilitate the installation (extension from the reel 23) and removal (winding onto the reel 23) of the cable 21, the reel 23 is driven by a remote control operation. For example, since the operator may operate the reel 23 at a position away from the reel 23, it is difficult for the operator to check the extension amount of the cable 21 from the reel 23 as needed.

  However, as described above, when it is detected that the extension amount of the cable 21 exceeds a predetermined value, the rotation of the electric motor 19 of the reel 23 is stopped. Even if it is difficult to see, it is possible to prevent the cable 21 from being damaged due to an erroneous operation by the operator.

  Further, according to the ship 1, when it is detected that the extension amount of the cable 21 exceeds a predetermined value when receiving power from the external power source P, the power source switching control means 51 It switches so that the electric power received from the said external power supply P may be received from the said generator 3. FIG.

Therefore, when the power is supplied from the external power source P for some reason, the ship 1 is separated from the quay Q by a predetermined distance, for example, the plug 25 at the tip of the cable 21 is connected to the socket P1 of the quay Q. Even if a situation that deviates from the situation occurs, the power supply to the ship 1 can be continuously performed by uninterruptible switching.
{To Kuranuki-sama; support for deleting, but if you delete, I left it because it could not be consistent with the department. Takashima}
When it is detected that the amount of extension of the cable 21 exceeds a predetermined value while receiving power from the external power source P, an alarm device is used under the control of the control device 11. The main breaker may be shut off while issuing an alarm.

  Furthermore, when it is detected that the amount of extension of the cable 21 exceeds a predetermined value when receiving power from the external power supply P, a protection circuit for the external power supply P is detected via the signal line. The control device 11 may output a signal for operating the external power source P. 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 cable 21 is disconnected, the malfunction due to the disconnection of the cable 21 causes the external power supply P to fail. Can be avoided.

It is a figure which shows the schematic structure of the ship which concerns on embodiment of this invention, and the state which the said ship touches the quay. It is a figure which shows schematic structure of the conventional ship.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ship 3 Power generator 7 Diesel engine 9 Governor 13 Main bus 15 Power supply line 17, 39, 41 Circuit breaker 19 Electric motor 21, 33 Cable 23 Reel 37 Inboard cable 45 Cable extension amount detection means 51 Power supply switching means P External power supply

Claims (11)

In a ship that has a power generation device for supplying power to be used and that can receive power from an external power source,
A reel capable of winding or extending a cable for receiving power from the external power source by rotating;
Power supply switching means capable of switching without power failure when switching the power received from the power generator to be received from the external power source via the cable;
A ship characterized by comprising: In the ship according to claim 1,
The ship according to claim 1, wherein the power source switching means is a means for switching the power generation frequency generated by the power generation device lower than the power source frequency of the external power source. In the ship according to claim 2,
A main bus provided on the ship for supplying power to the equipment installed on the ship;
A first circuit breaker provided at an intermediate portion or an end portion of an inboard cable for connecting the cable and the main busbar;
A second circuit breaker provided at an intermediate portion or an end portion of a power supply line connecting the power generation device and the main bus;
And the power supply switching means is configured to gradually reduce the rotational speed of the prime mover of the power generation device with a governor when switching the power received from the power generation device to be received from the external power supply via the cable. The power generation frequency generated by the power generation device is controlled to be slightly lower than the power supply frequency of the external power source, the electric circuit of the first circuit breaker is closed, and the electric circuit of the first circuit breaker A ship characterized by being means for opening an electric circuit of the second circuit breaker after closing. In a ship that has a power generation device for supplying power to be used and that can receive power from an external power source,
A reel capable of winding or extending a cable for receiving power from the external power source by rotating;
Power switching means capable of switching without power failure when switching power received from the external power source via the cable so as to be received from the power generator;
A ship characterized by comprising: In the ship according to claim 4,
The ship according to claim 1, wherein the power source switching means is a means for switching the power generation frequency generated by the power generation device higher than the power frequency of the external power source. In the ship according to claim 5,
A main bus provided on the ship for supplying power to the equipment installed on the ship;
A first circuit breaker provided at an intermediate portion or an end portion of an inboard cable for connecting the cable and the main busbar;
A second circuit breaker provided at an intermediate portion or an end portion of a power supply line connecting the power generation device and the main bus;
And when the power switching means switches the power received from the external power source via the cable so as to be received from the power generator, the number of revolutions of the prime mover of the power generator is controlled by a governor, After the power generation frequency generated by the power generation device is set slightly higher than the power supply frequency of the external power supply, the circuit of the second circuit breaker is closed, and the circuit of the second circuit breaker is closed A ship for opening the electric circuit of the first circuit breaker. In the ship according to any one of claims 1 to 6,
An external power supply abnormality detecting means capable of detecting the abnormality of the external power supply through a signal line;
When it is detected that an abnormality has occurred in the external power supply in a state where power is being supplied from the external power supply, the operation of the power generator is started and the external power supply is received via the cable. Power supply switching control means for controlling the power supply switching means to receive electric power from the power generator;
A ship characterized by comprising: In the ship according to any one of claims 1 to 7,
A power generator abnormality detecting means capable of detecting an abnormality of the power generator;
An abnormality signal output means for outputting a signal for operating the protection circuit of the external power supply to the external power supply via a signal line when the abnormality is detected;
A ship characterized by comprising: In the ship according to claim 7 or claim 8,
The ship, wherein the signal line is provided integrally with the cable. In the ship according to any one of claims 1 to 9,
Cable extension amount detection means capable of detecting the extension amount of the cable from the reel;
Reel control means for stopping the rotation of the actuator of the reel when detecting that the extension amount of the cable exceeds a predetermined value;
A ship characterized by comprising: In the ship according to any one of claims 1 to 10,
Cable extension amount detection means capable of detecting the extension amount of the cable from the reel,
When it is detected that the extension amount of the cable exceeds a predetermined value when receiving power supply from the external power source, the power source switching control means converts the power received from the external power source to A ship characterized by being a means for switching to receive from a power generator.

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