WO2006008849A1

WO2006008849A1 - Ship

Info

Publication number: WO2006008849A1
Application number: PCT/JP2005/003149
Authority: WO
Inventors: Yukiteru Naguchi; Seiji Sudou; Naoyuki Ohno; Yuji Kotani
Original assignee: Ihi Marine United Inc.; Nippon Yusen Kabushiki Kaisha; Terasaki Denki Sangyo Kabushiki Kaisha
Priority date: 2004-07-20
Filing date: 2005-02-25
Publication date: 2006-01-26
Also published as: CN100410143C; TWI329597B; JP4436203B2; JP2006027536A; TW200604057A; KR100844113B1; CN1878694A; KR20060103529A

Abstract

A ship (1) having a generator (3) for supplying electric power consumed by the ship and capable of receiving electric power from an external power supply (P). The ship (1) further has a reel (23) on/from which a cable (21) for receiving electric power from the external power supply (P) can be wound/let out when the reel (23) is rotated and power supply switching means (51) for switching the electric power received from the generator (3) to the electric power from the external power supply (P) through the cable (21) without stop of supply of electric power.

Description

Specification

Boat

Technical field

[0001] 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 supply from an external power source. The present invention relates to a reel that can be wound and accommodated with a cable for connection and that can switch the power supply without interruption. Background art

[0002] Conventionally, there has been known a ship that is equipped with a power generation device for supplying power to be used by itself and that can receive power from an external power source (land power source) installed on land. Yes.

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

[0004] The conventional ship 1 0 0 includes a power generation device 1 0 2, and the power generation device 1 0 2 supplies power to the other devices 1 0 0 via the circuit breaker 1 0 4. It is electrically connected to the main bus 10 6 for supplying power.

[0005] For example, the upper deck 1 0 8 of the conventional ship 1 0 0 has a power receiving terminal 1

10 is provided, and the power receiving terminal 1 1 0 and the main bus 10 6 are electrically connected to each other via an inboard cable 1 1 2. A breaker 1 1 4 is provided in the middle of the inboard cable 1 1 2.

[0006] And, when receiving power supply from the onshore power supply facility, the conventional power receiving terminal 1 1 0 installed on the ship 100 and the onshore power supply terminal 1 installed on the quay 1 6 is connected to each other with a cable 1 1 8, and the above circuit breaker 1 0 4 (breaker between the main bus 1 0 6 and the generator 1 0 2) is opened to open the circuit breaker The circuit of 1 1 4 (breaker between main bus 1 0 6 and external power supply) is closed.

[0007] As a technique related to the above-described conventional technique, for example, Japanese Patent Application Laid-Open No. 2 0 0 1-3 The technology described in Japanese Patent No. 0 9 5 5 3 is known.

[0008] By the way, although depending on the amount of electric power used in the ship, the cable 118 having a large diameter and a large mass is generally used. Therefore, in the conventional ship 100, the cable 110 provided on the ship 100 or the quay is used with a crane (not shown) installed on the ship 100 or the quay. There is a problem that it takes a lot of man-hours to install the cable 1 1 8 as described above.

[0009] When the power used by the ship 1 0 0 is switched from the power generator 1 0 2 to the external power after the cable 1 1 8 is wired, the circuit of the circuit breaker 1 0 4 is opened. Since the circuit of the circuit breaker 1 14 is closed, power is not supplied to the main bus 10 6, and there is a problem that a power failure occurs once in the ship 1 100.

[0010] The present invention has been made in view of the above problems, and is provided with a power generation device for supplying electric power used by itself, and can also be supplied with electric power from an external power source. Therefore, it is an object of the present invention to provide a ship that can be switched easily and without interruption when switching the power supply source.

Disclosure of the invention

[001 1] The invention based on the first aspect of the present invention includes a power generation device for supplying power to be used, and a ship that can receive power supply from an external power source. By rotating, a reel capable of winding or extending a cable for receiving power supply from the external power source, and the power received from the power generation device from the external power source via the cable When switching to receive, it is a ship that has power switching means that can be switched without power failure.

[0012] Based on the second aspect of the present invention <the invention is the ship according to the first aspect>, wherein the power source switching means is a power generation unit that generates power. Set the frequency lower than the power supply frequency of the external power supply, and It is a ship which is a means to perform.

[0013] The invention based on the third aspect of the present invention is the ship described in the second aspect, in order to supply power to the equipment installed in the ship, A main bus provided on a ship, a first circuit breaker provided at an intermediate portion or an end of an inboard cable connecting the cable and the main bus to each other, the generator and the main bus. A second circuit breaker provided at an intermediate portion or an end portion of the power supply lines connected to each other, and the power source switching means transmits the power received from the power generation device via the cable. When switching to receive from an external power source, the speed of the prime mover of the power generator is controlled so as to gradually decrease with a governor, and the power generation frequency generated by the power generator is slightly lower than the power frequency of the external power source. Keep it low and on The ship is a means for opening the electric circuit of the second circuit breaker after closing the electric circuit of the first circuit breaker and closing the electric circuit of the first circuit breaker.

[0014] Based on the fourth aspect of the present invention <Invention is provided with a power generation device for supplying power to be used, and in a ship capable of receiving power supply from an external power source] A reel capable of winding or extending a cable for receiving power supply from the external power source by rotating; and a power received from the external power source via the cable. When switching from a power generation device, the ship has a power switching means that can be switched without power failure.

[0015] The invention based on the fifth aspect of the present invention is the ship according to the fourth aspect, wherein the power switching means is a power generation frequency generated by the power generation device. Is a ship which is a means for performing the switching while keeping the frequency higher than the power frequency of the external power source.

[0016] The invention based on the sixth aspect of the present invention is the ship described in the fifth aspect, in order to supply electric power to the equipment installed in the ship, A main bus provided on a ship, a first circuit breaker provided at an intermediate portion or an end of an inboard cable for connecting the cable and the main bus to each other; A second circuit breaker provided at an intermediate portion or an end portion of the power supply line connecting the electric device and the main bus to each other, and the power supply switching means is connected to the external power supply via the cable. When switching the power received from the power source to receive from the power generator, the number of motors of the power generator is controlled by a governor, and the power generation frequency generated by the power generator is changed to the external power source. The power circuit frequency of the first circuit breaker is closed after the power circuit frequency of the first circuit breaker is closed, the circuit circuit of the second circuit breaker is closed, and the circuit circuit of the first circuit breaker is closed. Is a ship

[0017] Based on the seventh aspect of the present invention <the invention is the ship according to any one of the first aspect, the sixth aspect, , The external power supply abnormality detecting means capable of detecting the abnormality of the external power supply through the signal line, and detecting that an abnormality has occurred in the external power supply while receiving power from the external power supply. In such a case, operation of the power generator is started, and power switching is performed to control the power switching means so that the power received from the external power source via the cable is received from the power generator. A ship having control means

[0018] Based on the eighth aspect of the present invention <the invention is the ship according to any one of the first aspect, the seventh aspect, The power generation device abnormality detecting means capable of detecting the abnormality of the power generation device, and a signal for operating the protection circuit of the external power source when the abnormality is detected to the external power source via a signal line. It is a ship which has an abnormal signal output means to output.

[0019] The invention based on the ninth aspect of the present invention is the ship according to the seventh aspect or the eighth aspect, wherein the signal line is integrated with the cable. It is a marine vessel that is provided.

[0020] The invention based on the 10th aspect of the present invention is the ship described in any one of the first aspect and the 9th aspect. And a cable extension amount detecting means capable of detecting the extension amount of the cable from the reel, and when detecting that the extension amount of the cable exceeds a predetermined value, It is a ship having reel control means for stopping the rotation of the act overnight.

[0021] The invention based on the first aspect of the present invention includes the first aspect, the first aspect, and the second aspect.

The ship according to any one of the first and second aspect を has cable extension amount detecting means capable of detecting the extension amount of the cable from the reel, and When it is detected that the extension amount of the cable exceeds a predetermined value while receiving power from an external power supply, the power supply switching control means uses the power received from the external power supply as described above. It is a ship that is a means of switching to receive from the power generator.

Brief Description of Drawings

FIG. 1 is a diagram showing a schematic configuration of a ship according to an embodiment of the present invention and a state in which the ship is in contact with a quay.

FIG. 2 is a diagram showing a schematic configuration of a conventional ship.

BEST MODE FOR CARRYING OUT THE INVENTION

FIG. 1 is a view showing 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.

[0024] The ship 1 is provided with an appropriate number of power generation devices 3 for supplying power to be used by itself, and is configured to be able to receive power from an external power source P.

[0025] It should be noted that the ship 1 is assumed to be a passenger ship that consumes more electricity than other ships, a container ship for transporting refrigerated cargo, and the external power source P. The power generation facilities of the power plant installed on land will be assumed.

[0026] First, each device for supplying power from the power generation device 3 to the ship 1 will be described.

[0027] The power generator 3 includes a power generator 5, and the power generator 5 is driven by a prime mover such as a diesel engine 7 and can generate power.

[0028] The diesel engine 7 is provided with a governor 9. 9 is capable of adjusting the rotational speed of the diesel engine 7 under the control of the control device 1 1. By adjusting the rotational speed of the diesel engine 7, the power generation frequency, phase, and the like of the electric power output from the power generator 5 (power generation device 3) can be controlled.

[0029] 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. It comes to supply.

[0030] An intermediate portion or an end portion of the power supply line 15 connecting the main bus 13 and the power generator 3 (generator 5) to each other is, for example, a VCB (V acum Circuit Breaker) The circuit breaker 1 7 is provided, and the main bus 1 3 (the ship) is opened from the generator 5 by opening and closing the circuit of the circuit breaker 17 under the control of the control device 11. Power can be supplied to 1) and the power supply can be stopped.

[0031] Next, each device for supplying power from the external power source P to the ship 1 will be described.

[0032] A socket P1, which is an example of a connection terminal of the external power supply P, is installed in a portion of the quay Q near the sea (for example, the upper surface of the quay Q and the end on the sea side). The socket P 1 is connected to the external power source P via a cable P 3 wired in the ground of the quay Q.

[0033] By installing the socket P 1 and the cable P 3 as described above, there is no interference between the container crane for carrying cargoes such as containers into and out of the ship 1 and the cable P 3. It becomes easy to install the container crane on the quay Q.

[0034] The ship 1 is wound or extended with a cable 21 for receiving power from the external power source P by rotating the electric motor 19 or the like overnight. The cable 23 is provided with a plug 23 which is an example of the connection terminal on the ship 1 side. [0035] 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 connected to the socket of the external power source P installed on the quay Q. The reel 23 is provided at a place where P 1 is installed or a position where it can easily be reached.

More specifically, the rotation center axis of the reel 23 extends in the front-rear direction of the ship 1, and the reel 2 3 rotates in a predetermined direction so that the cable 2 1 However, it extends in the downward direction on the quay Q side.

[0037] Further, in the vicinity of the reel 23, where the cable 21 extends, a guide member 2 for enabling the cable 21 to be smoothly extended and wound. 7 is provided.

[0038] Then, by rotating the reel 23 and extending the cable 21, the cable 21 extends as shown by a two-dot chain line in Fig. 1, and the plug 25 extends to the socket P1. To reach.

[0039] After the plug 25 reaches the socket P1, the operator connects the plug 25 to the socket P1.

[0040] In addition, the ship 1 is provided with a power receiving panel 29 provided with a plug 31, and is provided at the tip of another cable 33 extending from the reel 23. By connecting the socket 35 to the plug 31, power can be supplied from the external power source P to the power receiving panel 29.

[0041] The cable 3 3 is a different cable from the cable 2 1 wound around the reel 2 3, and does not extend from the reel 2 3 due to the rotation of the reel 2 3, and the reel 2 3 So that it will not be wound up. The cable 21 and the other cable 33 are electrically connected to each other through a slip ring or the like provided on the reel 23. [0042] Further, in the middle of the inboard cable 37 connecting the plug 3 1 (each cable 21, 3 3) and the main bus 1 3 and inside the power receiving panel 29, for example, A breaker 39 composed of VCB is provided, and the breaker 4 1 is in series with the breaker 3 9 above the inboard cable 37 and on the main bus 13 side. Is provided.

[0043] Then, under the control of the control device 11 1, by opening and closing the electric circuit of the circuit breakers 39, 41, from the external power source P via the cables 21, 33, etc. Electric power can be supplied to the main bus 13 (the ship 1), and the supply of electric power can be stopped.

[0044] The circuit breakers 39, 41 may be installed at the end of the inboard cable 37. In addition, since V C B is used as a circuit breaker, it can be reliably interrupted even at a high voltage (for example, a voltage of 6600 V).

[0045] Furthermore, in FIG. 1, only one cable 2 1, 3 3, and one inboard cable 3 7 are shown. However, depending on the amount of power used in the ship 1, each cable 2 1, 3 3 and a plurality of inboard cables 3 7 may be provided in parallel, and in accordance with this, a plurality of reels 2 3 and circuit breakers 3 9 and 4 1 may be provided. If a plurality of reels 23 are provided, the reels can be arranged side by side so that the rotation center axes of the reels coincide with each other, and driven by a single electric motor 19. Can be simplified.

[0046] Next, the reel 23 will be described in more detail.

[0047] The reel 23 is rotationally driven by a remote control. That is, under the control of the motor controller 43, the electric motor 19 is rotationally driven by the remote control, and the reel 23 is rotated.

[0048] The reel 23 is provided with cable extension amount detection means 45 that can detect the extension amount of the cable 21 from the reel 23, and the cable 21 has When it is detected that the extension amount exceeds a predetermined value, the rotation of the electric motor 19 on the reel 23 is stopped under the control of the motor controller 43. It has become so.

[0049] Next, the signal line connecting the ship 1 and the external power source P to each other will be described.

[0050] The signal line is for transmitting information between the ship 1 and the external power source P, and is composed of, for example, a single optical fiber.

[0051] Further, the signal line is provided integrally with the cables 21, 33, and P 1. That is, for example, the power supply line for supplying power and the optical fiber 1 are provided in parallel with each other in the outer sheath of each of the cables 21, 33, and P 1.

[0052] When the plug 25 is inserted into the socket P1, the signal line provided in the cable 21 and the signal line provided in the cable P3 are connected to each other. It has come to be.

[0053] Even when the socket 35 is inserted into the plug 31, the signal line provided in the cable 33 and the signal line provided in the plug 31 are mutually connected. Connected.

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 is connected to the inboard cable 3 7 as described above. Is connected to the circuit breaker 39.

[0055] On the other hand, the signal wires that are wired apart from each other 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. The device 47 is connected to the control device 11 through 1_049. Information can be exchanged between the control device 11 and the external power source P (a protection circuit described later or a control device for the external power source P).

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

[0057] The power source switching means 5 1 receives the power received by the ship 1 from the power generator 5 from the external power source P via the cables 2 1, 3 3, and 3 7. In addition, the above-mentioned cables 2 1, 3 3 When switching the power received by the ship 1 from the external power source P via the power generator P to the ship 1 from the power generator 5, it is possible to switch without power failure. Means.

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 the electricity generated by the power generation apparatus 3. A power generator phase detection means (not shown) capable of detecting the phase, an external power supply phase detection means (not shown) capable of detecting the phase of the external power supply P, and an external power supply frequency of the external power supply capable of being detected. Power frequency detection means (not shown).

[0059] Then, when switching to receive the electric power received from the power generation device 3 from the external power source P via the cables 21, 33, 37, the power generation detected by the power generation frequency detection means While comparing the power generation frequency of the device 3 and the power frequency of the external power source P detected by the external power frequency detection means with the control device 11, the rotational speed of the diesel engine 7 of the power generation device 3 is 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 by controlling so that it is gradually reduced by the power source 9.

[0060] 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 source P, and the open circuit breakers 3 9 and 4 1 Close the circuit (closed so that power is supplied from the external power supply P to the main bus 1 3), and then close the circuit for each circuit breaker 39, 41, then close the circuit for the circuit breaker 17 Is opened (so that power is not supplied from the power generator 3 to the main bus 13), and switching is performed.

[0061] After the switching, the operation of the power generator 3 (diesel engine 7) is stopped.

[0062] On the other hand, when switching the electric power received from the external power source P via the cables 2 1, 3 3 and 3 7 to be received from the power generator 3, the operation of the power generator 3 is started. The power generation frequency of the power generation device 3 detected by the power generation frequency detection means and the external power supply P detected by the external power supply frequency detection means While comparing the power frequency with the control device 11, the speed of the diesel engine 7 of the power generation device 3 is controlled by the governor 9, and the power generation frequency generated by the power generation device 3 is Make the power supply P slightly higher than the power supply frequency.

[0063] 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, and the circuit of the open circuit breaker 17 is closed, After closing the circuit of the circuit breaker 17, the circuit of each circuit breaker 39, 4 1 that has been closed is opened for switching.

[0064] 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. If the above switching is performed when the phases coincide with each other, smoother switching can be performed so that the waveform of the power supplied to the ship 1 is not disturbed.

[0065] 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 coincide with each other, switching can be performed more smoothly.

Note that 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.

[0068] For example, the control device 11 of the ship 1 has an external power supply abnormality that can detect an abnormality of the external power supply P via a signal line provided in each of the cables 21, 3 3, and P 3. When detecting that an abnormality has occurred in the external power supply P in a state in which a detection means (not shown) is provided and power is supplied from the external power supply P, the operation of the power generator 3 is performed. Power supply switching control for controlling the power supply switching means 51 to receive from the power generator 3 the power received from the external power supply P via the cables 2 1, 3 3 and 3 7. Means (not shown) are provided.

[0069] Further, for example, the control device 11 of the ship 1 is different from the power generation device 3 in the above. A power generator abnormality detection means (not shown) capable of detecting a normal condition is provided. When the abnormality is detected, a signal for operating a protection circuit (not shown) of the external power supply P An abnormal signal output means (not shown) for outputting to the external power supply P through a line is provided.

[0070] Furthermore, when the power is supplied from the external power source P, the cable

2 When the cable extension amount detection means 4 5 detects that the extension amount of 1 exceeds a predetermined value, the power supply switching means 5 1 uses the power received from the external power source P as described above. Switching to receive from power generator 3

[0071] Next, an 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.

[0072] The state immediately after the ship 1 touches the quay Q will be described.

[0073] First, the operator rotates the reel 2 3 by remote control, extends the cable 2 1 until the plug 2 5 reaches the socket P 1, and plugs the plug 2 5 into the socket P 1. Plug in.

[0074] Subsequently, the control device 11 controls to gradually reduce the rotational speed of the diesel engine 7 of the power generation device 3, and the power generation frequency of the power generation device 3 is the power source of the external power source P. Close the circuit of each circuit breaker 39, 4 1 that has been opened, and then close the circuit of the circuit breaker 17 that has been closed.

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.

[0076] 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 external frequency. Close the circuit of the open circuit breaker 1 7 so that it is slightly higher than the power frequency of the power supply P. After closing the circuit breaker, close the circuit breakers 3 9 and 4 1 closed. open.

[0077] Subsequently, the operator removes the plug 2 5 from the socket P 1 and removes it. The reel 2 3 is rotated by the control, and the cable 2 1 is wound up.

[0078] According to the ship 1, the reel 2 3 that can wind or extend the cable 21 for receiving power supply from the external power source P by being rotated by the electric motor 19; When switching to receive the power received from the generator 3 from the external power supply P via the cable 21, the power supply switching means 5 1 that can be switched uninterrupted is provided. There is no need to prepare a separate cable like this, and there is no need to wire this cable using a crane (not shown) installed on the ship or quay. Since it is only necessary to connect to the external power supply terminal P 1 provided in Q, the installation (wiring) of the cable 21 is simplified, the installation of the cable 21 can be easily performed, and the power is not interrupted. Ship with 1 power supply It is possible to change, cut off the feed source.

[0079] Similarly, when the power received from the external power source P via the cable 21 is switched to be received from the power generator 3, the cable 21 can be easily removed. In addition, the power source of the ship 1 can be switched without interruption.

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

[0081] In addition, since the power supply source can be switched uninterrupted, it is possible to continue using the electrical equipment used in the ship 1 without any trouble even at the time of switching. it can.

[0082] Furthermore, the reel 23 is provided on the upper side of the ship 1 on the side that is berthed to the quay Q, that is, the cable 21 extends from the reel 23. The reel 23 is installed in a position where the plug 25 at the end of the cable 21 can easily reach the socket P1 of the external power supply P installed on the quay Q. As a result, the installation work of the cable 2 1 is simplified. Also, as before, capes on quays and ships There is no need to install a separate crane to install the crane.

[0083] Further, when power is not supplied from the external power source P, the cable 21 can be wound and stored by the reel 23, so that the cable 21 is in the way. In addition, when trying to receive power from the external power source P, the cable 21 can be extended immediately.

[0084] It should be noted that when ship 1 is anchored in the port (when ship 1 is berthed at quay Q), power can be supplied from the onshore external power supply P. It is not necessary to operate the device 3, and no noise or exhaust gas is emitted from the power generation device 3, so that deterioration of the environment around the port 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 power generation device 3 is switched to the external power source P. Current backflow can be prevented.

Furthermore, according to the ship 1, when switching the electric power received from the power generation device 3 to be received from the external power source P via the cable 21, the diesel engine 7 of the power generation device 3 is changed. The power generation frequency of the power generation device 3 is slightly lower than the power supply frequency of the external power supply P, so that the power generation device 3 and the main bus 1 are controlled. Therefore, the frequency of the power supply supplied to 3 does not change abruptly. Therefore, it is possible to prevent an overcurrent from flowing through the main bus 13 or other devices connected thereto.

[0087] Also, 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 generator 3 is started. At the same time, since the electric power received from the external power source P is automatically switched to be received from the power generation device 3, even if an abnormality occurs in the external power source P and power supply becomes impossible, the ship 1 It is possible to prevent power outages.

[0088] 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 supply P is output to the external power supply P. Failure of the above external power supply P due to abnormality has not occurred. It can be prevented.

[0089] Further, according to the ship 1, since the signal line is installed integrally with the cable, the signal line can also be installed when the cable 21 is installed. There is no need to install signal lines separately.

[0090] 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. Therefore, it is not necessary to separately connect the above signal lines, and the situation of forgetting to connect the signal lines can be avoided.

[0091] Further, according to the ship 1, the rotation of the electric motor 19 of the reel 23 is stopped when it is detected that the extension amount of the cable 21 exceeds a predetermined value. It is possible to prevent the cable 21 from being damaged due to the excessive extension of 1.

[0092] Also, installation (extension from reel 2 3) and removal of the cable 21 (reel)

In order to facilitate the work, the reel 23 is driven by remote control operation. In other words, the operator moves the reel 2 away from the reel 23. 3 may be operated, so it is difficult for the operator to check the extension amount of the cable 21 from the reel 23.

[0093] 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 for the operator to see the extended state of the cable 21, the cable 21 can be prevented from being damaged due to an erroneous operation in the evening.

[0094] Further, according to the ship 1, when it is detected that the extension amount of the cable 21 exceeds a predetermined value while receiving power from the external power source P, the power source switching control is performed. The means 51 switches so that the electric power received from the external power source P is received from the generator 3.

[0095] 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. 1 Even if a situation occurs in which the plug 2 5 at the end of the plug 2 5 is disconnected from the socket P 1 of the quay Q, it is possible to continue supplying power to the ship 1 with uninterruptible switching.

[0096] Note that when the external power supply P is supplied with power, the cable

When it is detected that the extension amount of 21 exceeds a predetermined value, an alarm device may be used to issue an alarm and the main circuit breaker may be shut off under the control of the control device 11.

[0097] Further, when the power is supplied from the external power supply P, the cable

2 When detecting that the extension amount of 1 exceeds a predetermined value, a signal for operating the protection circuit of the external power supply P is sent from the control device 11 to the external power supply via the signal line. You may make it output to 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 is The possibility of occurrence at the power supply P can be avoided.

[0098] It should be noted that the entire contents of Japanese Patent Application No. 2 0 0 4-2 1 2 1 6 3 (filed on Jul. 20, 2000) are incorporated herein by reference. Yes.

[0099] The present invention is not limited to the embodiment of the invention described above, and can be implemented in other modes by making appropriate changes.

Claims

The scope of the claims

[1] In a ship equipped with a power generator for supplying power to be used and capable of receiving 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 power generation device from the external power source via the cable;

A ship characterized by comprising:

[2] 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 frequency of the external power source.

[3] In the ship according to claim 2,

A main bus provided in the ship for supplying power to the equipment installed in the ship;

A first circuit breaker provided at the middle or end of the inboard cable connecting the cable and the main bus;

A second circuit breaker provided at an intermediate portion or an end portion of the power supply line connecting the power generator and the main bus;

And the power supply switching means gradually changes the number of revolutions 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 slightly lower than the power supply frequency of the external power source, the electric circuit of the first circuit breaker is closed, and the first circuit breaker is closed. A ship characterized by being means for opening the circuit of the second circuit breaker after closing the circuit of the circuit breaker.

[4] It is equipped with a power generator to supply the power to be used. In ships that can be supplied with power,

Power switching means capable of switching without power failure when power received from the external power source via the cable is switched from the power generator;

A ship characterized by comprising:

[5] 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.

[6] In the ship according to claim 5,

The power source switching means controls the rotational speed of the prime mover of the power generation device with a governor when switching the power received from the external power source via the cable to be received from the power generation device. The power generation frequency generated by the power generation device is set slightly higher than the power supply frequency of the external power source, the circuit of the second circuit breaker is closed, and the circuit of the second circuit breaker is closed. And a means for opening the electrical circuit of the first circuit breaker.

[7] Claim 1 In the ship according to any one of claims 6,

The external power supply abnormality detecting means capable of detecting the abnormality of the external power supply through the signal line and the power supply from the external power supply receive an abnormality in the external power supply. When it is detected that the power generation device has occurred, the power generation device is started to operate, and the power supply switching means is controlled so that the power received from the external power supply via the cable is received from the power generation device. A ship having power switching control means;

[8] Claim 1 In the ship according to any one of claims 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;

[9] In the ship according to claim 7 or claim 8,

A ship characterized in that the signal line is provided integrally with the cable.

[10] Claim 1 In the ship according to any one of claims 9,

A cable extension amount detecting means capable of detecting an extension amount of the cable from the reel;

Reel control means for stopping 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:

[1 1] Claim 1 Claim 10 In the ship according to any one of claims 0 to 10,

A cable extension amount detecting 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 while receiving power supply from the external power supply, the power supply switching control means uses the power received from the external power supply as described above. A ship characterized by being a means for switching to receive from a power generator.