WO2008041498A1

WO2008041498A1 - Ship power supply system

Info

Publication number: WO2008041498A1
Application number: PCT/JP2007/068305
Authority: WO
Inventors: Tsunemitsu Tsuji
Original assignee: Tsuji Heavy Industries Co., Ltd.
Priority date: 2006-09-28
Filing date: 2007-09-20
Publication date: 2008-04-10
Also published as: JP2008081054A; CN101331055B; KR20080067324A; KR100953906B1; CN101331055A

Abstract

Provided is a power supply system (400) for supplying power to an electric facility (200) mounted on a ship. The power supply system (400) includes: generators (142, 144) for generating electricity; deck cranes (122, 124, 126, 128) including a regenerative unit (350) which receives electric power to lift an object (121) and generates electricity when lowering the object (121); an accumulator (260) which accumulates electric power generated by the regenerative unit (350); and a bus (152) commonly connected to a generator (140); the accumulator (260); the electric facility (200), and the regenerative unit (350). According to the bus (152), electric power is supplied to the electric facility (200) other than the deck cranes (122, 124, 126, 128) on the ship.

Description

Specification

Ship power supply system

Technical field

The present invention relates to a ship power supply system. In particular, the present invention relates to a system for supplying electric power to an electric equipment in a ship by dripping a ship equipped with a hoist including a regenerative brake. This application is related to the following Japanese application. For designated countries where incorporation by reference of documents is permitted, the contents described in the following application are incorporated into this application by reference and made a part of this application.

1. Patent application 2006— 266003 Application 曰 September 2006 曰

Background art

[0002] Ships are equipped with electrical equipment that operates by supplying electric power. Examples of power facilities on ships are lighting equipment, communication equipment, positioning devices, etc., as well as mooring winches and windlasses. In addition, electrical equipment such as cooking utensils, lighting fixtures, and air conditioners will be installed in the ship's residential area. Furthermore, depending on the use of the ship, hoisting machines and electric hatches may be installed.

[0003] Patent Document 1 below describes a power supply device for ships. This marine power supply device includes a solar cell unit as a power supply source in addition to a regular generator connected to an inboard load via a distribution board including a distribution line. As a result, it is possible to effectively use the energy obtained from the solar rays by the ship and suppress the consumption of fuel for power generation.

[0004] Further, Patent Document 2 below also describes a marine power supply device. This power supply device for ships simplifies the power supply system by converting the bus to DC. Furthermore, Patent Document 3 below describes that a large-capacity fuel cell is mounted on a hydrofoil and power is supplied from the fuel cell to the ship's berth electrical equipment.

Patent Document 1: Japanese Patent Laid-Open No. 10-032942

Patent Document 2: Japanese Patent Laid-Open No. 11 266532

Patent Document 3: Japanese Unexamined Patent Application Publication No. 2004-066917

Disclosure of the invention Problems to be solved by the invention

[0005] However, it is difficult to cover the electric power of the onboard electrical equipment with the electric power obtained by the solar cell unit, which has a low power generation efficiency. In addition, since fuel cells use fuel or fuel generation means for power generation, when using the power equipment of a ship under voyage in the fuel cell, the fuel, etc., must be mounted on the ship. There is a fault.

Means for solving the problem

[0006] As a first aspect of the present invention, there is provided a power supply system that is mounted on a ship and supplies electric power to an electric facility, and a generator that generates electric power, and a cargo handling target is raised by receiving the supply of electric power. , A hoist having a regenerative brake that generates electric power when the cargo handling object is lowered, a capacitor that stores electric power generated by the regenerative brake, and a generator, a capacitor, electrical equipment, and a regenerative brake An electric power supply system is provided that includes an electric power bus and supplies electric power to electrical equipment other than the hoist in the ship based on the electric power bus.

Brief Description of Drawings

FIG. 1 is a perspective view schematically showing the exterior of a cargo ship 100 according to an embodiment of the present invention.

FIG. 2 is a diagram schematically showing an electrical installation 200 in the cargo ship 100.

FIG. 3 is a diagram schematically showing the electrical structure of the hoist 300.

FIG. 4 is a diagram schematically showing the structure of an in-board power supply system 400 of a cargo ship 100.

FIG. 5 is a graph showing the transition of the amount of power in the power supply system 400.

Explanation of symbols

[0008] 100 cargo ships, 110 hulls, 121 cargo targets, 122, 124, 126, 128 deck cranes, 130 bridges, 140 generators, 142 service generators, 144 emergency generators, 150 switchboards, 152 busbars, 154, 156 circuit breaker, 200 electrical equipment, 210 windlass, 212 anchor, 220 mooring winch, 222 mooring wire, 230 electric hatch, 232 hatch cover, 240 residential electrical equipment, 241, 252, 262 controller, 242 Blower, 244 Floodlight, 246 Interior light, 248 Navigation light, 250 Secondary battery, 260 Battery, 300 Hoist, 310 swivel tower, 320 cabin, 330 jib, 340 reverse converter, 342 jib motor, 344 whisker motor, 346 swivel motor, 350 regenerative unit, 360 slip ring, 400 power supply system

BEST MODE FOR CARRYING OUT THE INVENTION

[0009] Hereinafter, the present invention will be described through embodiments of the invention. However, the following embodiments do not limit the invention according to the scope of claims, and are combinations of features described in the embodiments. Not all are essential to the solution of the invention.

FIG. 1 is a perspective view schematically showing the exterior of a cargo ship 100 equipped with a power supply system 400 according to an embodiment of the present invention. As shown in the figure, the cargo ship 100 includes a plurality of cargo compartments inside a hull 110. The top of each cargo compartment is opened and closed by hatch covers 232. In addition, deck terrains 122, 124, 126, and 128 are provided in the vicinity of each of the hatch covers 232, respectively. A cargo ship 100 equipped with such equipment carries the cargo handling object 121 to the hold in the hull 110 by operating the deck cranes 122, 124, 126, and 128 with the hatch cover 232 open. Can be carried out.

[0011] Further, a bridge 130 including a residential area where crew members board is disposed near the rear end of the hull 110 of the cargo ship 100. In addition, a generator 140 and a switchboard 150 described later are mounted in the hull 110 below the bridge 130. The switchboard 150 supplies power to each part of the ship via a bus 152 described later.

[0012] FIG. 2 is a diagram schematically showing the electrical installation 200 including the deck cranes 122, 124, 126, 128, and the deck cranes 122, 124. 126 and 128 each include a swirl tower 310 mounted on the upper end of a base 301 fixed to the hull 110. The swirl tower 310 swirls relative to the base 301. Further, the swirl tower 310 has a jib 330 that can be moved up and down. The jib 330 moves up and down itself and winds or unwinds a wire suspended from the tip of the jib 330 to lift and lower the cargo handling object 121 suspended at the tip of the wire. Touch with S.

[0013] When the deck cranes 122, 124, 126, and 128 raise the cargo handling object 121, electric power corresponding to the weight of the cargo handling object 121 is consumed. On the other hand, when lowering the cargo handling target 121 Lower the vehicle at an appropriate speed while braking the moving parts against the weight of the cargo handling object 121 and the jib 330.

The electric equipment 200 of the cargo ship 100 includes a windlass 210, a mooring winch 220, and an electric hatch 230. These windlass 210 and mooring winch 220 are connected to bus 152 of this cargo ship 100. The windlass 210 is the power used to roll up the heavy anchor 212. In this case, it consumes power. In addition, the mooring winch 220 is also used to wind up the mooring wire 222 (the mooring chain). The electric hatch 230 electrically opens and closes the hatch cover 232 provided on the deck of the hull 110.

[0015] Furthermore, the electrical facility 200 has a residential electrical facility 240 that consumes power, such as a blower 242, a projector 244, an interior light 246, and a navigation light 248, in the residential area of the bridge 130. Although not shown, the residential electrical facility 240 includes communication equipment, radar, navigation equipment, cooking equipment, and the like. These residential district electrical facilities 240 are also connected to the bus 152 and receive power supply.1 Because of relatively low power consumption and many devices manufactured on the premise of commercial power on land, the residential district electrical facilities Power is supplied to the 240 at a voltage of about 100V.

Furthermore, the cargo ship 100 is equipped with a secondary battery 250, a capacitor 260, and a generator 140 that generate or hold the power to be supplied to the power facility 200 described above. The generator 140 is connected to the bus 1502, and supplies power to each part of the ship through the bus 152 at a high voltage of about 440V. Thus, by providing the generator 140 connected to the bus 152 in the ship, the generator 140 can be operated and sufficient power can be supplied when large electric power is required for the operation of the electrical equipment 200 in the ship. .

[0017] Secondary battery 250 and capacitor 260 are connected to bus 152 via individual control devices 252 and 262, respectively, to prevent overcharging and the like. The secondary battery 250 is mainly used when power is supplied to the residential electrical facilities 240 during berthing.

[0018] The storage battery 260 has a larger capacity than the secondary battery 250, and stores a large amount of electric power generated by a regenerative unit 350 described later. As a result, it is possible to supplement the power supply when the power consumption in the ship increases by storing more power. In other words, by mounting the capacitor 260, the peak power generation capacity of the generator 140 can be suppressed. As described above, the battery 260 further includes the battery 260 connected to the bus 152, and the battery 260 can store the electric power generated by the regenerative unit 350 that operates as a regenerative motor. As a result, it is possible to flexibly meet the power demand for the on-board electrical equipment 200 and use regenerative power without waste.

[0020] It is preferable that a power storage device using an electric double layer capacitor is used as the power storage device 260 used in such an application. The electric double layer capacitor accumulates electric charge in the electric double layer generated at the boundary between the electrode and the electrolyte. The electric double layer is equivalent to a single molecule! /, Forming a very thin gap to the limit, so that power can be stored at a very high energy density. However, since the electric double layer is broken when the applied voltage exceeds the withstand voltage, the power storage device is formed in combination with the control device 262 that manages the applied voltage.

As described above, a power storage device using an electric double layer capacitor can be used as the power storage device 260. Thereby, electric power can be accumulated at a high energy density and used as electric power for operating the electric equipment 200 in the ship.

FIG. 3 is a diagram schematically showing the electrical structure of the hoist 300 used as the deck cranes 122, 124, 126, 128 shown in FIGS. 1 and 2. In FIG. 3, the swirl tower 310 is extracted.

[0023] As shown in the figure, outside the swivel tower 310, a cabin 320 in which a control device for the hoist 300 is arranged is provided. In addition, a jib 330 is attached to the outside of the swirl tower 310.

[0024] Inside the swirl tower 310, a jib motor 342 that moves up and down the jib 330, a hoist motor 344 that winds up a gear that suspends a hook, and a swirl motor 346 that swivels the swirl tower 310 itself are arranged. In addition, an inverter 340 that controls electric power supplied from the bus 152 and supplies the electric power to the jib motor 342, the hoist motor 344, and the swing motor 346 is also provided. Electric power for driving each motor is supplied from the bus 152 through a slip ring 360 provided at the bottom of the swirl tower 310.

Thus, in the power supply system 400, the hoist 300 can be an electric hoist having the reverse converter 340. As a result, it is possible to operate the hoist 300 using the electric motor as a power source. [0026] Furthermore, the revolving unit 310 is equipped with the revolving unit 310. The regenerative unit 350 reduces the descent speed of the cargo handling object 121 and the jib 330 by converting the kinetic energy of the cargo handling object 121 and the jib 330 into electric power when the cargo handling object 121 handled by the hoist 300 is lowered. The electric power generated by the regenerative unit 350 is returned to the bus 152 in the hull 110 via the slip ring 360.

[0027] The hoist 300 lowers the jib 330 by the weight of the jib 330 and the weight of the hook attached to the tip of the wire even when the cargo handling object 121 is not suspended, and generates power from the regenerative unit 350. Can be generated. The electric power generated in this case can also be accumulated in the accumulator 260 and the secondary battery 250 and used in the other residential area electrical equipment 240 on the ship.

FIG. 4 is a diagram schematically showing the structure of the power supply system 400 in the cargo ship 100. As shown in the figure, in the power supply system 400, each of the electric facilities 200 is connected to a bus 152 provided on the switchboard 150 via a circuit breaker 156. In addition, the battery 260 and the secondary battery 250 are also connected to the bus 152 via the control devices 241, 252, and 262, respectively. Further, the generator 140 is also connected to the bus 152 via the circuit breaker 154. The generator 140 includes a service generator 142 and an emergency generator 144, and each generator 140 is individually connected to the bus 152 via the circuit breaker 154.

[0029] In the power supply system 400 as described above, each of the electrical equipment 200 is electrically connected to the bus 152 unless the circuit breakers 154 and 156 and the control devices 241, 252 and 262 block electrical connection. Combined. Therefore, if sufficient electric power is supplied from any of generator 140, secondary battery 250, power storage device 260, and regenerative unit 350 as a power source for bus 152, electric facility 200 can operate.

[0030] For example, when equipment with high power consumption is operating, such as deck cranes 122, 124, 126, 128, wind, lath 210, mooring winch 220, electric hatch 230, etc., operate generator 140 In this way, power corresponding to the power consumption is supplied. Further, for example, when a small amount of power such as an indicator lamp is consumed while berthed, the secondary battery 250 supplies power.

[0031] On the other hand, for example, four deck cranes 122, 124, 126, and 128 are operated during cargo handling work, so that it is required to supply electric power corresponding to that. Generator with such power 1 To supply from 40, it is necessary to equip the generator 140 with a large amount of power generation. However, in this power supply system 400, power is also supplied to the bus 152 from the regenerative unit 350 equipped with the four deck cranes 122, 124, 126, and 128 that have lowered the cargo handling object 121. Supplied. Therefore, this power supply system 400 can suppress the maximum power generation required for the generator 140.

[0032] Thus, in this power supply system 400, a ship includes a plurality of hoisting machines 300 connected to a common bus 152, and when one of the hoisting machines 300 lowers a cargo handling target 121, the regenerator 300 is regenerated. The electric power generated by the brake can be supplied to the other hoist 300 that raises the cargo handling object 121. As a result, the hoist 300 can be operated economically by using the regenerative power efficiently.

[0033] Fig. 5 (Fig. 5) is a graph showing the transition of the electric energy when one of the cargo cranes shown in the figure, and the deck crane 122, 124, 126, 128 is operated. The power supply system 400 of this cargo ship 100 has the structure shown in Fig. 4. Note that the power storage device 260 includes a power storage device (hereinafter referred to as "EDLC") that has an electric double layer capacitor with sufficiently small internal resistance. ) Was used.

[0034] As shown in FIG. 5, when one of the cranes 122, 124, 126, and 128 is loaded and unloaded, and the jib 330 is raised and lowered, the motor enters the beginning when the operation starts. Power consumption exceeds 250kW due to current. Thereafter, in the case of an operation for raising the cargo handling object 121 or the jib 330, regenerative power is generated in the case of an operation for lowering the power that continues the power consumption. Also, in the operation of raising the cargo handling object 121 or jib 330, regenerative power is generated at the end of each operation period. Therefore, by effectively using these regenerative power, the load on the generator 140 is reduced. In addition, since the large-capacity storage battery 260 is provided, the deck cranes 122, 124, 126, and 128 can be stopped (even if the generator 140 is stopped, the small electric power consumption of the residential electrical equipment 240, etc. can be covered. it can.

[0035] As described above, the power supply system 400 is mounted on a ship and supplies electric power to the electrical equipment 200 other than the hoist 300 in the ship, and the hoist 300 includes a regenerative brake that generates electric power when it is lowered. And a power supply system 400 including an electric facility 200 and a bus 152 to which a regenerative brake is coupled in common. This makes the hoist 30 When the cargo handling object 121 is lowered at 0, the energy dissipated as thermal energy can be efficiently recovered and used to operate the on-board electrical equipment 200. In addition, by using various types of electrical equipment 200 as the destination of the regenerative power, it is possible to efficiently use the regenerative power regardless of the amount of regenerative power.

[0036] Further, the power supply system 400 that supplies the electric power generated by the hoist 300 equipped with the regenerative unit 350 to the electric equipment other than the hoist 300 of the electric facility 200 can reduce the fuel consumption for the electric power supply. As a result, in addition to reducing fuel costs, emissions of carbon dioxide, nitrogen oxides, sulfur oxides, etc. can be suppressed, and the environmental burden can be reduced.

As described above, the present invention has been described using the embodiment, but the technical scope of the present invention is not limited to the scope described in the above embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the embodiment. It is clear that the embodiment described above can be included in the technical scope of the present invention with such changes or improvements.

Claims

The scope of the claims

[1] A power supply system for supplying power to electrical equipment mounted on a ship,

A generator for generating electric power;

A hoist having a regenerative brake that generates electric power when raising the cargo handling object and receiving the power supply and lowering the cargo handling object;

A battery for storing electric power generated by the regenerative brake;

An electric power bus in which the generator, the accumulator, the electrical equipment, and the regenerative brake are coupled in common;

With

A power supply system that supplies power to electrical equipment other than the hoist in the ship based on the power bus.

[2] The ship includes a plurality of hoists connected to the common bus, and when one of the hoists lowers a cargo handling target, the power generated by the regenerative brake of the hoist increases the cargo handling target. The power supply system according to claim 1, wherein the power supply system is supplied to another one of the hoists to be caused.

[3] The power supply system according to [1], wherein the hoist is an electric hoist having an inverse converter.

4. The power supply system according to claim 1, wherein the bus bar transmits AC power.

5. The power supply system according to claim 2, wherein the hoist is an electric hoist having an inverse converter.

6. The power supply system according to claim 2, wherein the bus bar transmits AC power.

7. The power supply system according to claim 3, wherein the bus bar transmits AC power.

8. The power supply system according to claim 5, wherein the bus bar transmits AC power.