CN205544287U - Boats and ships bank electric system based on compound electric wire netting of alternating current -direct current - Google Patents

Boats and ships bank electric system based on compound electric wire netting of alternating current -direct current Download PDF

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Publication number
CN205544287U
CN205544287U CN201620085781.3U CN201620085781U CN205544287U CN 205544287 U CN205544287 U CN 205544287U CN 201620085781 U CN201620085781 U CN 201620085781U CN 205544287 U CN205544287 U CN 205544287U
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ship
power supply
converter
break
bus
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张桂臣
臧绪运
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Shanghai Guantu Electric Technology Co Ltd
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Shanghai Guantu Electric Technology Co Ltd
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Abstract

The utility model provides a boats and ships bank electric system based on compound electric wire netting of alternating current -direct current, system include that bank electricity management system, distribution system, dc bus row, portable power supply connect ship unit and fixed power supply to connect the ship unit, bank electricity management system connects ship unit and fixed power supply to meet ship unit communication connection with distribution system, dc bus row, portable power supply respectively, distribution system is connected with the one end that the dc bus was arranged, the other end that the dc bus was arranged connects ship unit and each fixed power supply to connect the ship unit connection with each portable power supply respectively. The advantage does: the problem of a great deal of technical problem and the difficult point that exist in the current bank electric system, the power supply who leads to because of boats and ships grid voltage difference in frequency is matching problem not, ship electricity and bank electricity are because of the not compatible production of power supply standard is solved, to different grade type ship oceangoing ship strong adaptability, the capacity extension is easy, and the convenience is arranged to the pier, and wind energy, solar energy, energy storage insert easily, and extensions is more convenient.

Description

The shipping shore power system of electrical network it is combined based on alternating current-direct current
Technical field
The utility model belongs to ship energy saving technical field of emission reduction, is specifically related to a kind of shipping shore power system being combined electrical network based on alternating current-direct current.
Background technology
Along with global climate constantly warms, effectively controlling greenhouse gas emission, environment protection has caused the common concern in the whole world.For promoting the development of low-carbon economy, energy-saving and emission-reduction have become one of major fields of the corporation responsibility of international community, highest attention and fundamental state policy.
Shipping is the key industry of oil consumption, is also one of the important sources of greenhouse gases (GHG) and air pollution emission.International Maritime Organization (IMO) correlation report shows, the total carbon dioxide capacity of whole world boats and ships discharge was 1,000,000,000 tons in 2007, accounted for the 3.3% of global carbon dioxide total emission volumn.Owing on Global Sea Surface, volume of trade increases, if control measure put in place not in time, it is contemplated that will increase nearly 5 times in the year two thousand fifty, accounting may increase to 18%.Therefore, IMO, European Union etc. take the measure of a series of control boats and ships carbon emission.When front because world economic growth is slow, the double influence of shipping business freight volume surplus contradiction, shipping business is faced with unprecedented continued downturn.The environmental regulation that fuel cost height, the rate of return on investment day by day dropped, shipping supply surplus, harbour and course line are the strictest, IMO energy efficiency index restriction etc., all operation of ship is brought lot of challenges, therefore, ship energy saving reduces discharging and green energy resource exploitation are one of inevitable choices alleviating energy environment pressure.
Current ship energy saving Mitigation options is divided into technical measures and operation measure etc..Wherein, technical measures include improving Ship Design, raising engine efficiency, supply bank electricity, utilizing alternative fuel etc..Operation measure includes reducing hull roughness, strengthening daily management maintenance, employing economical speed etc..Such as, shipping company's commonly used ship-shore cooperation fuel oil consumes monitor supervision platform, by boats and ships Daily energy expenditure, ship trapped fuel amount, distance to go every day, away from the relevant parameter such as port of destination distance, drauht, sea situation, useful load time-triggered report company, company rationally reduces the speed of a ship or plane in the case of guaranteeing schedule, minimizing Ship Anchoring treats ETS estimated time of sailing, reasonable arrangement oiling harbour, relies on management to realize the target of energy-saving and emission-reduction.
Wherein, the boats and ships that reach port use power-supply system on the bank to power, it has also become reduce an important technology of harbour environment pollution problem.Concrete, if boats and ships reach port, period utilizes marine diesel generator is that full ship is powered, pollutant and the used heat such as nitrogen oxides (NOX), oxysulfide (SOX), particulate matter (PM), VOC (VOC) will be discharged, harbour environment and waters are caused the biggest pollution, subsidiary engine generating simultaneously produces bigger noise, has a strong impact on neighbouring resident and the work of crewman and life.
If not using subsidiary engine during vessel berth harbour and being that full ship is powered with power supply on the bank, then boats and ships reach port will not have pollutant emission.Port district provides shore electric power peculiar to vessel, great to the Significance for Environment in protection port district, urban district, also builds for " green harbour " and tremendous contribution is made in development.From the point of view of shore electric power is for ship, after reaching port, use bank electricity can drop the low burn oil consumption cost of 30%, its remarkable in economical benefits.
At present, the following policy relevant to ship shore electric and regulation have been put into effect:
California, USA is the country taking the lead in promulgating the law limiting Pollution From Ships discharge.Adding Li Fuliya state to come into force in 2009 the regulation reducing discharging boats and ships, laws and regulations requirement boats and ships of 50% from 1 day January in 2014 use bank electricity and are incremented by successively every year, January 1 reach the boats and ships use bank electricity target of 80% to the year two thousand twenty.Bank electricity peculiar to vessel has been done mandatory provisions by California, USA at present.
The many countries in Europe have also put into effect the measure encouraging boats and ships to use bank electricity.European Union suggestion harbour in 2006 provides ship shore electric or the fuel oil of sulfur-bearing 0.1%, and " EU Directive 2005/33/EC 2010 " statutory regulations is reaching port from beginning boats and ships in 2010 and using ship shore electric in the suggestion of interior river valley boats and ships.
2012, International Electrotechnical Commission, International Organization for standardization, Electrical and Electronic engineering association 3 combined and have issued international standard IEC/ISO/IEEE80005-1, i.e. " at port facility Part I: high voltage shore power system typically requires ".
Along with the application of bank power technology grows with each passing day, Department of Transportation has also organized to set up relevant standard criterion: on July 4th, 2012, " dock ship bank electricity Facilities Construction technical specification JTS155 2012 " and " yard craft shore-based power supply systems technology condition JT/T814 2012 " that Ministry of Communications enacts and enforces, the general regulation that its bank base section being primarily directed to shipping shore power system is carried out, and " newly-built container terminal is proposed, dry bulk cargo terminals, cruise terminal and visitor's roller harbour, should plan in engineering project, design and build in comprise dock ship bank electricity facility content " compulsive requirement.In July, 2012, Department of Transportation has issued JT/T815 2012 " yard craft shore-based power supply system operating technology code ", attempts operation management daily to shipping shore power system and is specified in terms of workflow and the formality that should fulfil etc..In May, 2011, CCS has issued " boats and ships high voltage shore power system test principle ".This principle is installed bank electricity system for Current Domestic boats and ships and is entered level detection and provide foundation, and provides ship base facility standard for the design of domestic ship shore electric, product manufacturing, construction transformation, for installing the high voltage shore power unit check gone on board and issuing licence.
" Pearl River Delta, the Yangtze River Delta, boats and ships emission control district, Circum-Bohai Sea (Jing-jin-ji region) waters embodiment " enforcement from 1 day January in 2016 that Department of Transportation prints and distributes, the boats and ships in the operation of emission control district can be taked to connect bank electricity, use clean energy resource, exhaust aftertreatment etc. and emission control to require the bodyfixed frame of equivalence.
The typical case that ship shore electric uses at home includes:
The PORT OF NINGBO first phase, 33 bank electricity o'clock were constructed and put into operation in June, 2010, and during test, the own boats and ships that pull in shore connect bank 33 ship/times of electricity, accumulative power-on time 211.8 hours, electricity consumption 5820 kilowatt hour altogether.According to measuring and calculating, these boats and ships use the generating of high sulfur content fuel oil, need fuel consumption 3374.6 kilograms, cost 21600 yuan.Using bank electricity is cost-effective 15700 yuan of these boats and ships, and savings rate reaches 73%.The PORT OF NINGBO second phase, 23 bank electricity o'clock were constructed and put into operation in 2013, and pool is using after bank electricity powers by the boats and ships of PORT OF NINGBO, saving fuel oil cost 3,400,000 yuan.Greatly improving the air quality of Gang Qu testing site, decrease vibration and the noise pollution of boats and ships simultaneously, crewman's quality of life is significantly improved.PORT OF NINGBO is built connects bank electricity point 58, connects the bank electricity number indicating a ship's order of departure year and surpassed for 5000 ship/times.According to measuring and calculating, pool by the boats and ships of PORT OF NINGBO after using bank electricity, every year can reducing emission of carbon dioxide, oxysulfide more than 800 ton, CER more than 90%, using bank electricity is the inevitable choice of energy-saving and emission-reduction.
State's Huaning sea power plant selects pilot high pressure ship shore electric technological transformation, develops " key is grid-connected " technology, it is achieved ship power supply " do not have a power failure switching ".Accumulative construction high voltage shore power point 5, connects electricity boats and ships 279 ship/time, saving fuel oil cost 5,360,000 yuan every year, reduces nearly 28.66 tons of the pollutant emission such as carbon dioxide, oxysulfide.
6,690,000 yuan of Lianyun Harbour in 2011 " high-pressure frequency-conversion digitlization marine shore power system research and development and application ".2010.10.24 " Sino-Korean star " " variable voltage variable frequency, high pressure go on board, uninterrupted power supply and automatically control ";2011.9.24 day " rich and powerful China " the whole series connect with having " high-pressure frequency-conversion, high-voltage transmission, uninterrupted power supply, the automatic transfer load of ship bank " bank power technology.Reach port boats and ships more than 8000 every year in Lianyun Harbour, and more than half uses bank electricity CO2 to reduce 120,000 T/Y, sulfide 2 kiloton, nitrogen oxides 3 kiloton;The boats and ships that reach port the most all use bank electricity, and annual CO2 reduces 9,170,000 tons, is equivalent to 1,800,000 people's discharge capacitys of a year;SO2 reduces 12.6 ten thousand tons, is equivalent to 7,200,000 people's discharge capacitys of a year;NOX reduces 19.5 ten thousand tons.
Visible, greatly develop shipping shore power system, have important practical significance.
Existing shipping shore power system is mainly made up of 3 parts: electric power system, ship bank interactive system, boats and ships are by electricity system and electric power conversion apparatus on the bank.At present, the mains frequency that China's boats and ships are used by electricity system is mostly 60Hz, and the bank electricity mains frequency that harbour electric power system on the bank is used is 50Hz.Therefore, become to be suitable for the 440V/60Hz alternating current of boats and ships by bank electricity electrical network 380V/50Hz convert alternating current by electric power conversion apparatus, and be capable of 50Hz/60Hz double frequency and power.
Past frequently with 50-60Hz electric power conversion apparatus be generating set formula (or claiming rotary), i.e. use two synchronous motors, as 10 pole synchronous motors drive 12 pole synchronous generators, the power supply of certain electric pressure 50Hz power supply of electrical network so can be converted to the power supply of 440V/60Hz.Compared with conventional generating set formula 60Hz power supply, 60Hz electronic still formula shore electric power enjoys people to pay close attention to due to advantages such as efficiency are high, noise is little, electricity function index is good.The composition of 60Hz electronic still formula shore electric power is, frequency converter (being responsible for 50Hz is transformed to 60Hz), sine wave filter (square wave that frequency converter exports is transformed to sine wave), output isolation transformer (voltage isolation, voltage transformation).
It addition, ship power distribution voltage includes high voltage power distribution and low-voltage distribution two kinds, high voltage power distribution is mainly 6.6 (6) kV, and low-voltage distribution is 440 (400) V.Boats and ships include low pressure boats and ships/low pressure bank electricity power supply plan, low pressure boats and ships/high voltage shore power power supply plan, high pressure boats and ships/high voltage shore power power supply plan with the allocation plan of bank electricity.Bank piezoelectric voltage, frequency that each port provides for boats and ships are not quite similar, and as north America region harbour provides the frequency of bank electricity to be 60Hz, most of Europe country is then 50Hz, and voltage, the frequency on dissimilar, different tonnes of boats and ships also differs.Shore electric power device on harbour needs the power supply system of shore electric power transfers to electricity consumption power supply standard corresponding with the boats and ships that reach port.
Above-mentioned shipping shore power system is primarily present following deficiency:
(1) different with mains frequency because of the line voltage of each boats and ships, thus cause network of ship not mate with frequency and the voltage of bank electricity electrical network
General foreign-going ship diesel generating set is usually the big class of 400V/50Hz, 450V/60Hz two, and working ship, the diesel generating set voltage of special boat have 690V, 6300V, 6600V, frequency 50Hz or 60Hz.Accordingly, it would be desirable to use complicated structural system, the matching problem of bank electricity electrical network and various network of ships could be realized.
(2) power supply system is incompatible
1., the safeguard procedures of singlephase earth fault are different
Port and pier bank electricity generally uses three-phase and four-line to add the TN electric power system of protective wire, incompatible with boats and ships IT electric power system standard, and TN system is that from the key difference of IT system the safeguard procedures to occurring singlephase earth fault to be used are different.When there is singlephase earth fault, TN system uses and concatenates leakage current sensor in N line, reflects that three-phase current is vector superposed and is not zero, thus Crush trigger or electronic component make circuit breaker trip, interrupts power supply and guarantees personal safety.And IT system does not the most export N line, when there is singlephase earth fault, its earth current the least (< 10A), do not result in human casualty accident, industry uses insulating monitoring warning device prompting trouble shooting, it is to avoid phase fault accident occurs.Although using bank electricity TN system directly normal to boats and ships IT system overall operation of powering, but still suffer from electrical hazard and apparatus insulated puncture.
2., integrity problem
Using bank electricity TN system directly when boats and ships IT system is powered, although N line breaks ship, but ship housing is connected with seawater, the earth, ship shore electric is equivalent to have employed TT solidly grounded system.Once generation singlephase earth fault; its switch meeting trip protection at once, ship power supply is immediately terminated, it is impossible to meet the successional requirement of boats and ships electricity consumption; the reliability of its power supply is substantially reduced, and then can produce huge economic loss and political fallout for large-scale important port district, base, military harbour.
3., electric leakage harm
Owing to have employed TN system directly to ship power supply, the service cable arriving boats and ships on the bank can produce small leakage current, long-play can produce corrosion to the reinforcing bar on harbour, thus reduces the service life of harbour reinforcing bar, then can bring life danger for underwater operation personnel and maintenance personal.
4., the transformation of bank electricity standard is difficult to
If Ship Design of the pulling in shore a set of IT power supply exclusively for port and pier, then cost of investment strengthens, use because IT power supply standard can not facilitate output 220V voltage economically to supply single-phase equipment, do not use during ship not in shore, the most uneconomical, and owing to boats and ships time of pulling in shore is less, equipment is in idle state for a long time, the environment of port and pier is the most severe (humidity, salt fog etc.), and components and parts are the most aging, and service life is shorter.
Visible, the most effectively solve the problems referred to above, be the problem that ship shore electric electric power system needs solution badly of promoting at present.
Utility model content
The defect existed for prior art, the utility model provides a kind of shipping shore power system and method for supplying power to being combined electrical network based on alternating current-direct current, can effectively solve the problems referred to above.
The technical solution adopted in the utility model is as follows:
The utility model provides a kind of shipping shore power system being combined electrical network based on alternating current-direct current, and including bank electric management system, distribution system, dc bus row, at least one portable power supply connects ship unit and at least one fixed power supply connects ship unit;
Wherein, described bank electric management system is respectively with described distribution system, described dc bus row, described portable power supply connects ship unit and described fixed power supply connects ship unit communication and is connected;
One end that described distribution system is arranged with described dc bus is connected;Power supply portable with each described connects ship unit to the other end of described dc bus row and each described fixed power supply connects ship unit and is connected respectively.
Preferably, described distribution system includes several power supply units;Each described power supply unit all includes: three-phase adjustable transformer, independent Y shape side controlled AC/DC rectifier, independent Δ shape side controlled AC/DC rectifier, independent Y shape side air-break, independent Δ shape side air-break;Described three-phase adjustable transformer is Y-Y-Δ type transformer, and its former limit is Y shape, for being connected with a power supply unit being distributed in dock area;Its secondary includes Y shape three-phase windings and Δ shape three-phase windings, after described Y shape three-phase windings passes sequentially through described Y shape side controlled AC/DC rectifier and described Y shape side air-break, is connected to described dc bus row;After described Δ shape three-phase windings passes sequentially through described Δ shape side controlled AC/DC rectifier and described Δ shape side air-break, it is connected to described dc bus row;
Additionally, described Y shape side controlled AC/DC rectifier and described Δ shape side controlled AC/DC rectifier are all connected to described bank electric management system.
Preferably, the former limit of described three-phase adjustable transformer is for being connected with a power supply unit being distributed in dock area, and the secondary of described three-phase adjustable transformer is for being directly connected with the ship power supply plug carrying bank electricity system.
Preferably, described distribution system also includes green energy resource power supply unit;
Described green energy resource power supply unit includes wind generator system, photovoltaic generating system and energy-storage system of accumulator;Described wind generator system, described photovoltaic generating system and described energy-storage system of accumulator are parallel to described dc bus row;
Described wind generator system includes wind power generating set, the independent the 1st controlled AC/DC rectifier, the 1st independent air-break and wind power generation controller;After described wind power generating set and described 1st controlled AC/DC rectifier series connection, it is connected to described dc bus by described 1st air-break and arranges;It addition, described wind power generation controller is connected with described wind power generating set and the independent the 1st controlled AC/DC rectifier respectively;
Described photovoltaic generating system includes photovoltaic electrification component, the 1st controlled DC/DC chopper, the 2nd independent air-break and photovoltaic electricity generation controller;After described photovoltaic electrification component and described 1st controlled DC/DC chopper series connection, it is connected to described dc bus by described 2nd air-break and arranges;It addition, described photovoltaic electricity generation controller DC/DC chopper controlled with described photovoltaic electrification component and the 1st respectively is connected;
Described energy-storage system of accumulator includes batteries, two-way controlled DC/DC chopper, the 3rd independent air-break and energy storage controller;After described batteries and the series connection of described two-way controlled DC/DC chopper, it is connected to described dc bus by described 3rd air-break and arranges;It addition, described energy storage controller is connected with described batteries and two-way controlled DC/DC chopper respectively;
Additionally, described wind power generation controller, described photovoltaic electricity generation controller and described energy storage controller are all connected to described bank electric management system.
Preferably, described portable power supply connect ship unit include at least one movable low-pressure power connect ship unit, at least one portable medium-pressure electricity supply connects ship unit and at least one Moveable high-pressure is powered and connect ship unit;
Described movable low-pressure is powered and is connect ship unit and include the 1st low-voltage alternating-current grid-connected converter DC/AC, the 4th air-break and the 5th air-break;The DC side of described 1st low-voltage alternating-current grid-connected converter DC/AC is installed to be reserved on the DC/AC exchange grid-connected converter interface of dc bus row by described 4th air-break, thus realizes the DC side of the 1st low-voltage alternating-current grid-connected converter DC/AC and the effect of dc bus row's energising;The AC of described 1st low-voltage alternating-current grid-connected converter DC/AC is by described 5th air-break and low electricity being connected with electrical interface of boats and ships;
Described portable medium-pressure electricity supply connects ship unit and includes: the 2nd low-voltage alternating-current grid-connected converter DC/AC, the 1st step-up transformer, the 6th air-break and the 1st vacuum automatic citrcuit bearker;The DC side of described 2nd low-voltage alternating-current grid-connected converter DC/AC is installed to be reserved on the DC/AC exchange grid-connected converter interface of dc bus row by described 6th air-break;After the AC of described 2nd low-voltage alternating-current grid-connected converter DC/AC passes sequentially through described 1st step-up transformer and described 1st vacuum automatic citrcuit bearker, with in delay unloading a ship being connected with electrical interface of oceangoing ship;
Described Moveable high-pressure is powered and is connect ship unit and include the 3rd low-voltage alternating-current grid-connected converter DC/AC, the 2nd step-up transformer, the 7th air-break and the 2nd vacuum automatic citrcuit bearker;The DC side of described 3rd low-voltage alternating-current grid-connected converter DC/AC is installed to be reserved on the DC/AC exchange grid-connected converter interface of dc bus row by described 7th air-break;After the AC of described 3rd low-voltage alternating-current grid-connected converter DC/AC passes sequentially through described 2nd step-up transformer and described 2nd vacuum automatic citrcuit bearker, with being connected with electrical interface of high pressure boats and ships;
It addition, described 1st low-voltage alternating-current grid-connected converter DC/AC, described 2nd low-voltage alternating-current grid-connected converter DC/AC and described 3rd low-voltage alternating-current grid-connected converter DC/AC are all connected to described bank electric management system.
Preferably, described fixed power supply connect ship unit include AC bus bar, several exchange grid-connected converter DC/AC and several transmission of electricity branch road;
The DC side of each described exchange grid-connected converter DC/AC is connected to the output of described dc bus row respectively by independent air-break;The AC of each described exchange grid-connected converter DC/AC is connected to the input of described AC bus bar respectively by independent air-break;The output of described AC bus bar is parallel with several transmission of electricity branch roads, and each described transmission of electricity branch road is mounted on an independent air-break;Each described transmission of electricity branch road uses electrical interface for be connected to boats and ships;
It addition, each described exchange grid-connected converter DC/AC and described AC bus bar are all connected to described bank electric management system.
Preferably, also include: several described fixed power supplies are connect and connected by disconnecting switch between the AC bus bar of ship unit;Described AC bus bar is laid in the independent trough of harbour buried cable ditch;
Described dc bus row be laid in the independent trough of harbour buried cable ditch equally;Further, the dc bus that described dc bus row is connected by disconnecting switch by several forms;Described dc bus row is reserved with the interface for being connected with controlled AC/DC rectifier and for the interface being connected with exchange grid-connected converter DC/AC every setpoint distance.
Preferably, each described transmission of electricity branch road is also in series with step-up transformer.
What the utility model provided be combined the shipping shore power system of electrical network based on alternating current-direct current has the advantage that
The utility model solves many technical problems and difficult point present in existing bank electricity system, solve the power supply mismatch problem caused because of network of ship electric voltage frequency difference, solve the problem that ship electricity produces because power supply system is incompatible with bank electricity, to dissimilar boats and ships strong adaptability, capacity extension is easy, harbour is arranged convenient, and wind energy, solar energy, energy storage are easily accessed, and Function Extension is more convenient.
Accompanying drawing explanation
The schematic diagram of the shipping shore power system being combined electrical network based on alternating current-direct current that Fig. 1 provides for the utility model;
The harbour layout drawing of the shipping shore power system being combined electrical network based on alternating current-direct current that Fig. 2 provides for the utility model.
Detailed description of the invention
In order to make the utility model be solved the technical problem that, technical scheme and beneficial effect clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the utility model, is not used to limit the utility model.
The utility model provides a kind of shipping shore power system being combined electrical network based on alternating current-direct current, to realize " green harbour " construction, for the purpose of increasing economic efficiency, using power-supply system on the bank is the ship power supply that reaches port, thus reach to reduce atmosphere pollution, improve ship energy saving emission reduction effect.
Concrete, in conjunction with Fig. 1 and Fig. 2, the shipping shore power system being combined electrical network based on alternating current-direct current includes that bank electric management system, distribution system, dc bus are arranged, at least one portable power supply connects ship unit and at least one fixed power supply connects ship unit.Described bank electric management system is respectively with described distribution system, described dc bus row, described portable power supply connects ship unit and described fixed power supply connects ship unit communication and is connected.One end that described distribution system is arranged with described dc bus is connected;Power supply portable with each described connects ship unit to the other end of described dc bus row and each described fixed power supply connects ship unit and is connected respectively.
Below in conjunction with Fig. 1 and Fig. 2, each system is discussed in detail respectively:
(1) distribution system
(1) controlled AC/DC rectifier part
Distribution system includes several power supply units;Each described power supply unit all includes: three-phase adjustable transformer, independent Y shape side controlled AC/DC rectifier, independent Δ shape side controlled AC/DC rectifier, independent Y shape side air-break, independent Δ shape side air-break;Described three-phase adjustable transformer is Y-Y-Δ type transformer, and its former limit is Y shape, for being connected with a power supply unit being distributed in dock area;Its secondary includes Y shape three-phase windings and Δ shape three-phase windings, after described Y shape three-phase windings passes sequentially through described Y shape side controlled AC/DC rectifier and described Y shape side air-break, is connected to described dc bus row;After described Δ shape three-phase windings passes sequentially through described Δ shape side controlled AC/DC rectifier and described Δ shape side air-break, it is connected to described dc bus row;
Additionally, described Y shape side controlled AC/DC rectifier and described Δ shape side controlled AC/DC rectifier are all connected to described bank electric management system.
The operation principle of above-mentioned power supply unit is:
The multiple supply stations (case) (35KV) being distributed in dock area respectively through threephase cable, three-phase adjustable transformer be filtered with pressure regulation after, access the AC of controlled AC/DC rectifier, through controlled AC/DC rectifier unsteady flow pressure regulation, output DC voltage 600VDC is grid-connected on common DC bus is arranged.
Bank electric management system communicates with each controlled AC/DC rectifier, can automatically control, according to dc bus row's power, the number that controlled AC/DC rectifier is devoted oneself to work.Concrete control mode is:
Bank electric management system detection harbour power supply quality, including voltage, electric current, frequency, power, harmonic wave, power factor, instantaneous variation etc., can each controlled AC/DC rectifier duty of real-time judge the most normal, after recognizing a normal and idle controlled AC/DC rectifier of duty, start the work of controlled AC/DC rectifier, and (polarity is identical to differentiate direct current grid-connected conditions, voltage is equal) whether meet, if met, the air-break of controlled AC/DC rectifier conducting direct current side, carry out dc bus grid-connected, then, controlled AC/DC rectifier exports stable 600VDC to dc bus row.
In whole system running, bank electric management system monitors and automatically controls the course of work of each controlled AC/DC rectifier in real time, it is ensured that the operating power that dc bus row provides meets boats and ships need for electricity.
(2) boats and ships of bank electricity system are carried
The former limit of three-phase adjustable transformer is for being connected with a power supply unit being distributed in dock area, and the secondary of described three-phase adjustable transformer is for being directly connected with the ship power supply plug carrying bank electricity system.
Its operation principle is:
Being mounted with the boats and ships of bank electricity system for some, the cable reel on boats and ships is carried the three-phase adjustable transformer that plug is directly inserted on harbour, harbour is directly gone on board for alternating current, the bank electricity system conversion on ship, meets shore electric power needed for boats and ships.
(3) green energy resource power supply unit
Described distribution system also includes green energy resource power supply unit;
Described green energy resource power supply unit includes wind generator system, photovoltaic generating system and energy-storage system of accumulator;Described wind generator system, described photovoltaic generating system and described energy-storage system of accumulator are parallel to described dc bus row;
Described wind generator system includes wind power generating set, the independent the 1st controlled AC/DC rectifier, the 1st independent air-break and wind power generation controller;After described wind power generating set and described 1st controlled AC/DC rectifier series connection, it is connected to described dc bus by described 1st air-break and arranges;It addition, described wind power generation controller is connected with described wind power generating set and the independent the 1st controlled AC/DC rectifier respectively;
Described photovoltaic generating system includes photovoltaic electrification component, the 1st controlled DC/DC chopper, the 2nd independent air-break and photovoltaic electricity generation controller;After described photovoltaic electrification component and described 1st controlled DC/DC chopper series connection, it is connected to described dc bus by described 2nd air-break and arranges;It addition, described photovoltaic electricity generation controller DC/DC chopper controlled with described photovoltaic electrification component and the 1st respectively is connected;
Described energy-storage system of accumulator includes batteries, two-way controlled DC/DC chopper, the 3rd independent air-break and energy storage controller;After described batteries and the series connection of described two-way controlled DC/DC chopper, it is connected to described dc bus by described 3rd air-break and arranges;It addition, described energy storage controller is connected with described batteries and two-way controlled DC/DC chopper respectively;
Additionally, described wind power generation controller, described photovoltaic electricity generation controller and described energy storage controller are all connected to described bank electric management system.
The green energy resources such as the utility model the comprehensive utilization wind energy of harbour, solar energy, the electric energy that photovoltaic generating system produces is incorporated to dc bus row through controlled DC/DC, wind power generation accesses dc bus row through AC/DC direct current grid-connected converter, energy-storage system of accumulator is attempted by dc bus row through two-way controlled DC/DC, available buffer, constant voltage DC bus, improve power supply quality.
(2) portable power supply connects ship unit
Described portable power supply connect ship unit include at least one movable low-pressure power connect ship unit, at least one portable medium-pressure electricity supply connects ship unit and at least one Moveable high-pressure is powered and connect ship unit;
Described movable low-pressure is powered and is connect ship unit and include the 1st low-voltage alternating-current grid-connected converter DC/AC, the 4th air-break and the 5th air-break;The DC side of described 1st low-voltage alternating-current grid-connected converter DC/AC is installed to be reserved on the DC/AC exchange grid-connected converter interface of dc bus row by described 4th air-break, thus realizes the DC side of the 1st low-voltage alternating-current grid-connected converter DC/AC and the effect of dc bus row's energising;The AC of described 1st low-voltage alternating-current grid-connected converter DC/AC is by described 5th air-break and low electricity being connected with electrical interface of boats and ships;
Described portable medium-pressure electricity supply connects ship unit and includes: the 2nd low-voltage alternating-current grid-connected converter DC/AC, the 1st step-up transformer, the 6th air-break and the 1st vacuum automatic citrcuit bearker;The DC side of described 2nd low-voltage alternating-current grid-connected converter DC/AC is installed to be reserved on the DC/AC exchange grid-connected converter interface of dc bus row by described 6th air-break;After the AC of described 2nd low-voltage alternating-current grid-connected converter DC/AC passes sequentially through described 1st step-up transformer and described 1st vacuum automatic citrcuit bearker, with in delay unloading a ship being connected with electrical interface of oceangoing ship;
Described Moveable high-pressure is powered and is connect ship unit and include the 3rd low-voltage alternating-current grid-connected converter DC/AC, the 2nd step-up transformer, the 7th air-break and the 2nd vacuum automatic citrcuit bearker;The DC side of described 3rd low-voltage alternating-current grid-connected converter DC/AC is installed to be reserved on the DC/AC exchange grid-connected converter interface of dc bus row by described 7th air-break;After the AC of described 3rd low-voltage alternating-current grid-connected converter DC/AC passes sequentially through described 2nd step-up transformer and described 2nd vacuum automatic citrcuit bearker, with being connected with electrical interface of high pressure boats and ships;
It addition, described 1st low-voltage alternating-current grid-connected converter DC/AC, described 2nd low-voltage alternating-current grid-connected converter DC/AC and described 3rd low-voltage alternating-current grid-connected converter DC/AC are all connected to described bank electric management system.
Visible, Moveable high-pressure is powered and is connect ship unit and be divided into low pressure, middle pressure, high pressure three types, and the DC side of exchange grid-connected converter DC/AC is connected on dc bus row, is the three-phase alternating current needed for boats and ships by the direct current transformation-unsteady flow-frequency conversion of 600VDC.Its AC connects from the boats and ships of different voltage requirements, that is: low pressure boats and ships are directly powered by low-voltage alternating-current grid-connected converter DC/AC, for middle pressure, the boats and ships of high-pressure type, needed after step-up transformer, vacuum automatic citrcuit bearker VCB by the electric energy of exchange grid-connected converter DC/AC output, then supply electricity to middle pressure, high pressure boats and ships.
Portable power supply connects ship unit and has the advantage that
There is low pressure, middle pressure, high pressure and the power supply mode of different capabilities, dissimilar boats and ships can be met and use the situation of bank electricity, solve conventional ship bank electricity power system capacity and limit and the restriction of boats and ships electric pressure.
(3) fixed power supply connects ship unit
Ship unit is connect by fixed power supply, by used in parallel for exchange grid-connected converter DC/AC combination, form local AC bussed supply system, thus can be Large Copacity ship power supply, also can be many ship power supplies, it is possible to configuration step-up transformer is that mesohigh large power ship is powered simultaneously.Thus meet all types of boats and ships and use demand.
Concrete, fixed power supply connects ship unit and includes AC bus bar, several exchange grid-connected converter DC/AC and several transmission of electricity branch roads;
The DC side of each described exchange grid-connected converter DC/AC is connected to the output of described dc bus row respectively by independent air-break;The AC of each described exchange grid-connected converter DC/AC is connected to the input of described AC bus bar respectively by independent air-break;The output of described AC bus bar is parallel with several transmission of electricity branch roads, and each described transmission of electricity branch road is mounted on an independent air-break;Each described transmission of electricity branch road uses electrical interface for be connected to boats and ships;
It addition, each described exchange grid-connected converter DC/AC and described AC bus bar are all connected to described bank electric management system.
Its operation principle is:
Bank electric management system can detect the state of each exchange grid-connected converter DC/AC automatically, and the Guan Bi switched including DC/AC DC side and AC or disengaged condition, the voltage x current that DC/AC powers or off-position, DC/AC communication are the most normal, DC/AC provides are the most in allowed limits etc.;Also can automatically differentiate DC/AC type, including the electric pressure model of DC/AC, the amount of capacity model of DC/AC, DC/AC mode of operation;Wherein, DC/AC mode of operation includes two classes, and a kind of for exchanging grid type mode of operation, one is independent power supply type mode of operation.
Concrete, bank electric management system, according to alongside Ship Types and power bracket, determines the quantity of exchange grid-connected converter DC/AC, and can the unrestricted choice combination exchange grid-connected quantity of grid-connected converter DC/AC.Reason is: voltage class of electric power system and the required power supply capacity of dissimilar boats and ships are different, including low pressure, medium and high pressure, 100KVA~10000KVA power bracket, therefore, need the voltage type according to ship piezoelectric voltage hierarchical selection inverter DC/AC, determine the grid-connected quantity of DC/AC according to ship capacitance, ship electrical power is the biggest, needs grid-connected DC/AC the most.
This public exchange bus can be many ship power supplies, it is possible to for Large Copacity ship power supply.Public exchange bus outlet automatic citrcuit bearker ACB or VCB performs and network of ship net operation, exchange grid-connected converter DC/AC adjusts automatically, make ship electricity meet with bank electricity phase sequence is consistent, voltage, frequency and phase place in allowed limits time, public exchange bus outlet automatic citrcuit bearker ACB or VCB closes a floodgate and accesses network of ship, carry out ship electric load and be automatically transferred to bank electricity, when automatic system of marine diesel-generator load shedding to (3-5) %, the automatic citrcuit bearker tripping operation of generator disengages, from network of ship, excise generating set, bank electricity be that full ship is powered.
By foregoing description it can be seen that the controlled inverter DC/AC that the utility model provides has two kinds of mode of operations, the pattern that respectively works independently and grid-connected mode of operation.Wherein, the pattern of working independently refers to: the DC side of DC/AC is connected on dc bus row, the AC of DC/AC is directly only supplied boats and ships, single DC/AC can meet ship electricity needs, then perform ship electricity and bank electricity net operation, that is: AC automatic citrcuit bearker ACB or VCB of exchange grid-connected converter DC/AC accesses network of ship, carry out ship electric load and be automatically transferred to bank electricity, when automatic system of marine diesel-generator load shedding to (3-5) %, the automatic citrcuit bearker tripping operation of generator disengages, from network of ship, excise generating set, bank electricity be that full ship is powered.
Grid-connected mode of operation refers to: need multiple DC/AC parallel operation, the DC side of multiple DC/AC is attempted by common DC bus, its AC is connected on public ac bus, then whether automatic decision DC/AC meets exchange grid-connected conditions, DC/AC adjusts that i.e. phase sequence is consistent automatically, voltage, frequency and phase place in allowed limits, perform the AC auto-parallel of exchange grid-connected converter DC/AC, form the exchange common bus of local.
(4) dc bus row and AC bus bar
Dc bus row and AC bus bar are laid in the independent trough of harbour buried cable ditch, and dc bus row can increase disconnecting switch every 300 meters, it is simple to Fault Isolation and maintenance.It addition, dc bus row can have quick socket every 50 meters of pre-installations, for being connected with controlled AC/DC rectifier and for being connected with exchange grid-connected converter DC/AC.
Dc bus row and AC bus bar are all connected with bank electric management system, bank electric management system can detect the voltage of dc bus row, electric current, ripple, temperature and humidity in real time, control and automatically identify dc bus row each disconnecting switch upper, thus required function can be arranged according to dc bus, the on off state of each disconnecting switch is controlled.Bank electric management system detects the parameters such as the voltage of AC bus bar, electric current, frequency, phase place, power, power factor, three-phase equilibrium degree, harmonic wave, temperature and humidity the most in real time.
The ship shore electric electric power system being combined electrical network based on alternating current-direct current that the utility model provides, its operation principle can be described generally as:
Bank electric management system SHS is a kind of digital measuring and control system, when alongside boats and ships connect bank electricity, bank electric management system and ship power station management system PMS set up communication, data sharing, bank electric management system becomes the subsystem of ship power station management system, bank electric management system accepts management and the scheduling of ship power station management system, bank electric management system is by ship power station management system identification Ship Types and power bracket and shows ship electrical quantity, ship power station management system detects bank electrical quantity by bank electric management system and controls whether bank electric management system is that this ship is powered.
Bank electric management system uses optical fiber, fieldbus, EPA and wireless communication technique, between ship bank, between direct current grid-connected converter, between exchange grid-connected converter, carry out comprehensive communication, there is monitoring in real time, control in real time, the functions such as automatic voltage tracking, adjustment automatically, automatic voltage regulation, the input automatically controlling current transformer or excision, display ship electricity and bank electrical quantity, real-time electric energy metrical in real time.Between boats and ships and bank electricity, switching only needs " one-touch " startup just can be automatically performed.
Concrete, bank electric management system detects whole alternating current-direct current and is combined electrical network systematic parameter, automatically identification direct current grid-connected converter AC/DC and exchanges grid-connected converter DC/AC type, quantity and duty.Boats and ships connect bank electricity or solution bank electricity employing aviation plug quickly couples or disengages, and first bank electric management system differentiates ship electricity and the changeover plug of bank electricity and socket control signal, communication signal the most normally, time only normal, could quickly couple or disengage;Couple and put in place or disengage when putting in place, automatically send " allowing operation " signal, then quickly couple or disengage power line, when power line aviation plug couple with socket put in place or disengage put in place time, automatically send " permission power-on servicing ".Finally it is automatically controlled by a computer the grid-connected or solution division operation carrying out between ship electricity and bank electricity, when condition meets, sends " allowing to close a floodgate " instruction or " permission separating brake " instruction, DC/AC AC breaker ACB or VCB automatic closing or separating brake.After bank electricity ship electricity is grid-connected, it is immediately performed load branching program.
Needing bank electricity is that ship electricity is powered, then load is automatically transferred to bank electricity by ship electricity, and when automatic system of marine diesel-generator load shedding to (3-5) %, the automatic citrcuit bearker tripping operation of generator disengages, and excises generating set, bank electricity be that full ship is powered from network of ship.When needing to excise bank electricity, then load is automatically transferred to ship electricity by bank electricity, when bank electricity undertakes load and is reduced to (3-5) %, the public exchange bus outlet breaker automatic trip of the AC breaker of the exchange grid-connected converter DC/AC of the pattern that works independently or the exchange grid-connected converter DC/AC of grid-connected mode of operation disengages, bank electricity is excised from network of ship, marine diesel generator is that full ship is powered.
The shipping shore power system being combined electrical network based on alternating current-direct current that the utility model provides, uses wireless ethernet communication between ship bank, has ship bank and monitor in real time, control in real time, the function such as automatic voltage tracking, automatic adjustment, automatic voltage regulation.Concrete, each grid-connected converter is respectively arranged with oneself unique address code, and all AC/DC and DC/AC in system can identify and mutually communication, data sharing automatically, thus can the work of automatic discrimination current transformer the most normal.Then, select DC/AC type and mode of operation, i.e. DC/AC work independently or exchange grid-connected work according to alongside boats and ships, select inverter type and grid-connected quantity according to electric pressure, the power bracket of alongside boats and ships.Have the advantage that
(1) difficult problem that ship electricity mates is solved with bank electricity: ship electricity and bank are electrically connected by alternating current-direct current grid-connected converter, eliminate frequency, voltage, phase place and the impact of power supply system and restriction between ship electricity and bank electricity, and the combination of alternating current-direct current grid-connected converter is convenient, there is filtering, power factor adjustment, dynamic characteristic is good, power supply quality is high advantage.
(2) problem that ship electricity is incompatible with bank electricity power supply system is solved: the three phase mains that bank electricity provides is rectified into direct current by controlled rectifier, becomes common DC bus, eliminates bank electricity three-phase four-wire system and the impact of frequency;Multiple controlled inverter parallels are connected on dc bus, and direct current is converted to three phase mains peculiar to vessel, and according to ship electricity requirement, the ship electricity that controlled inverter provides is three-phase three-wire system, 60 or 50Hz frequency and required ship piezoelectric voltage grade.
(3) solving the integrity problem of ship electricity and bank electricity: isolated by alternating current-direct current grid-connected converter with bank electricity system due to ship electricity system and be not joined directly together, the power supply system between ship electricity and bank electricity, frequency, voltage do not affect;During bank electricity single-phase earthing, earth leakage protective device action sends warning and trip protection; only send grounding alarm and trip protection does not occur during ship electricity single-phase earthing; ship electricity is different with the singlephase earth fault safeguard procedures of bank electricity and is independent of each other mutually; due to ship electricity and bank electricity between be controllable current transformer; the faults such as stream, overvoltage/under-voltage, the overfrequency/under-frequency excessively that ship electricity or bank electricity occur will not enter method, system; isolated by current transformer (i.e. rectifier and inverter) and be monitored protection, thus reliability is provided.
(4) shipping shore power system uses modularization, Distributed Design, system integration technical scheme, has flexible arrangement, extends convenient advantage.
Concrete, dc bus row can be incorporated to after controllable rectifier module AC/DC (direct current grid-connected converter) successively from the supply station wiring of harbour multiple subregion, by dc bus row distributed harbour being powered is put together, and meets capacity extension demand.Boats and ships electricity consumption side is respectively many ship uninterrupted power supplies by multiple controlled inversion module DC/AC (exchange grid-connected converter), DC/AC block combiner is powered flexible, convenient, power for large power ship on ac bus with the DC/AC module of type is grid-connected, meet dissimilar boats and ships need for electricity.
(5) wiring of dc bus row and AC bus bar all extends in underground, do not affect dock operation and traffic, its AC/DC direct current combining inverter, DC/AC exchange grid-connected converter is mobile unit, need to configure according to boats and ships, independent assortment extension capacity, a set of bank electricity system is available for many boats and ships electricity consumptions, reduces space requirement, both meet ship power supply demand, the most do not affect dock operation and traffic.
(6) the controlled DC/AC inversion module being connected with AC bus bar can be grouped automatically, parallel connection, meets real marine electric demand.The controlled DC/AC inversion module powered for single ship is portable, easy to use, increase operation rate.
(7) strong adaptability, can meet dissimilar, different capabilities boats and ships need for electricity, moreover it is possible to directly power for some boats and ships carrying bank electricity system.
Concrete, controlled inversion DC/AC coordinates transformer to solve the difficult problem on boats and ships difference electric pressure and different frequency, also has filtering, power factor adjustment function.
Because the electric power needed for maximization boats and ships is big, also need to consider the situation that bank electricity applied by many boats and ships simultaneously, it is desirable to shore electric power capacity is sufficiently large.The utility model has low pressure, middle pressure, high pressure and the power supply mode of different capabilities, meets dissimilar boats and ships and uses bank electricity, it may be assumed that meets different frequency, the power demands of different distribution voltage levels boats and ships, provides high-quality shore electric power quality for boats and ships.
(8) dc bus has voltage stabilizing, buffers, balances the boats and ships load start-stop impact to electrical network, reduce multiple boats and ships bank electricity grid-connected time impact each other.
(9) green energy resource such as wind energy, solar energy can be accessed easily, make contributions for green port construction.
(10) controlled AC/DC direct current grid-connected converter, controlled DC/AC exchange grid-connected converter composition union net, utilize the functional module of rectification/feedback unit, Eliminate highter harmonic, improve power factor, do not affected by power network fluctuation, there is the dynamic characteristic of brilliance, improve power supply quality and quality.
(11) it is applicable to port and pier electric circumstance powering mode and marine electrical equipment by power mode, there is universality, meet technical specification and the standard in this field, meet the needs of large-scale promotion.
(12) meet the boats and ships that reach port and connect quick, the safe and stable technical need of bank electricity, quick links, easy and simple to handle.After ship bank couples, on ship, shore power operation screen shows " bank electricity is available ", can press " accessing bank electricity " switch, then, after bank electricity automatic Regulation, automatic frequency-conversion, automatically adjustment after transfer ship bank grid-connected, automatic load, stop paying out motor.Operating process carries out ship-bank load transfer automatically, it is not necessary to connect bank electricity or excision bank electricity boats and ships in season power-off, it is achieved whole process uninterrupted power supply.
Visible, the utility model solves many technical problems and difficult point present in existing bank electricity system, solve the power supply mismatch problem caused because of network of ship electric voltage frequency difference, solve the problem that ship electricity produces because power supply system is incompatible with bank electricity, to dissimilar boats and ships strong adaptability, capacity extension is easy, and harbour is arranged convenient, wind energy, solar energy, energy storage are easily accessed, and Function Extension is more convenient.
The above is only preferred embodiment of the present utility model; it should be pointed out that, for those skilled in the art, on the premise of without departing from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should regard protection domain of the present utility model.

Claims (8)

1. the shipping shore power system being combined electrical network based on alternating current-direct current, it is characterised in that include bank electric management system, distribution system, dc bus row, at least one portable power supply connects ship unit and at least one fixed power supply connects ship unit;
Wherein, described bank electric management system is respectively with described distribution system, described dc bus row, described portable power supply connects ship unit and described fixed power supply connects ship unit communication and is connected;
One end that described distribution system is arranged with described dc bus is connected;Power supply portable with each described connects ship unit to the other end of described dc bus row and each described fixed power supply connects ship unit and is connected respectively.
The shipping shore power system being combined electrical network based on alternating current-direct current the most according to claim 1, it is characterised in that described distribution system includes several power supply units;Each described power supply unit all includes: three-phase adjustable transformer, independent Y shape side controlled AC/DC rectifier, independent △ shape side controlled AC/DC rectifier, independent Y shape side air-break, independent △ shape side air-break;Described three-phase adjustable transformer is Y-Y-△ type transformer, and its former limit is Y shape, for being connected with a power supply unit being distributed in dock area;Its secondary includes Y shape three-phase windings and △ shape three-phase windings, after described Y shape three-phase windings passes sequentially through described Y shape side controlled AC/DC rectifier and described Y shape side air-break, is connected to described dc bus row;After described △ shape three-phase windings passes sequentially through described △ shape side controlled AC/DC rectifier and described △ shape side air-break, it is connected to described dc bus row;
Additionally, described Y shape side controlled AC/DC rectifier and described △ shape side controlled AC/DC rectifier are all connected to described bank electric management system.
The shipping shore power system being combined electrical network based on alternating current-direct current the most according to claim 2, it is characterized in that, the former limit of described three-phase adjustable transformer is for being connected with a power supply unit being distributed in dock area, and the secondary of described three-phase adjustable transformer is for being directly connected with the ship power supply plug carrying bank electricity system.
The shipping shore power system being combined electrical network based on alternating current-direct current the most according to claim 2, it is characterised in that described distribution system also includes green energy resource power supply unit;
Described green energy resource power supply unit includes wind generator system, photovoltaic generating system and energy-storage system of accumulator;Described wind generator system, described photovoltaic generating system and described energy-storage system of accumulator are parallel to described dc bus row;
Described wind generator system includes wind power generating set, the independent the 1st controlled AC/DC rectifier, the 1st independent air-break and wind power generation controller;After described wind power generating set and described 1st controlled AC/DC rectifier series connection, it is connected to described dc bus by described 1st air-break and arranges;It addition, described wind power generation controller is connected with described wind power generating set and the independent the 1st controlled AC/DC rectifier respectively;
Described photovoltaic generating system includes photovoltaic electrification component, the 1st controlled DC/DC chopper, the 2nd independent air-break and photovoltaic electricity generation controller;After described photovoltaic electrification component and described 1st controlled DC/DC chopper series connection, it is connected to described dc bus by described 2nd air-break and arranges;It addition, described photovoltaic electricity generation controller DC/DC chopper controlled with described photovoltaic electrification component and the 1st respectively is connected;
Described energy-storage system of accumulator includes batteries, two-way controlled DC/DC chopper, the 3rd independent air-break and energy storage controller;After described batteries and the series connection of described two-way controlled DC/DC chopper, it is connected to described dc bus by described 3rd air-break and arranges;It addition, described energy storage controller is connected with described batteries and two-way controlled DC/DC chopper respectively;
Additionally, described wind power generation controller, described photovoltaic electricity generation controller and described energy storage controller are all connected to described bank electric management system.
The shipping shore power system being combined electrical network based on alternating current-direct current the most according to claim 1, it is characterized in that, described portable power supply connect ship unit include at least one movable low-pressure power connect ship unit, at least one portable medium-pressure electricity supply connects ship unit and at least one Moveable high-pressure is powered and connect ship unit;
Described movable low-pressure is powered and is connect ship unit and include the 1st low-voltage alternating-current grid-connected converter DC/AC, the 4th air-break and the 5th air-break;The DC side of described 1st low-voltage alternating-current grid-connected converter DC/AC is installed to be reserved on the DC/AC exchange grid-connected converter interface of dc bus row by described 4th air-break, thus realizes the DC side of the 1st low-voltage alternating-current grid-connected converter DC/AC and the effect of dc bus row's energising;The AC of described 1st low-voltage alternating-current grid-connected converter DC/AC is by described 5th air-break and low electricity being connected with electrical interface of boats and ships;
Described portable medium-pressure electricity supply connects ship unit and includes: the 2nd low-voltage alternating-current grid-connected converter DC/AC, the 1st step-up transformer, the 6th air-break and the 1st vacuum automatic citrcuit bearker;The DC side of described 2nd low-voltage alternating-current grid-connected converter DC/AC is installed to be reserved on the DC/AC exchange grid-connected converter interface of dc bus row by described 6th air-break;After the AC of described 2nd low-voltage alternating-current grid-connected converter DC/AC passes sequentially through described 1st step-up transformer and described 1st vacuum automatic citrcuit bearker, with in delay unloading a ship being connected with electrical interface of oceangoing ship;
Described Moveable high-pressure is powered and is connect ship unit and include the 3rd low-voltage alternating-current grid-connected converter DC/AC, the 2nd step-up transformer, the 7th air-break and the 2nd vacuum automatic citrcuit bearker;The DC side of described 3rd low-voltage alternating-current grid-connected converter DC/AC is installed to be reserved on the DC/AC exchange grid-connected converter interface of dc bus row by described 7th air-break;After the AC of described 3rd low-voltage alternating-current grid-connected converter DC/AC passes sequentially through described 2nd step-up transformer and described 2nd vacuum automatic citrcuit bearker, with being connected with electrical interface of high pressure boats and ships;
It addition, described 1st low-voltage alternating-current grid-connected converter DC/AC, described 2nd low-voltage alternating-current grid-connected converter DC/AC and described 3rd low-voltage alternating-current grid-connected converter DC/AC are all connected to described bank electric management system.
The shipping shore power system being combined electrical network based on alternating current-direct current the most according to claim 1, it is characterised in that described fixed power supply connects ship unit and includes AC bus bar, several exchange grid-connected converter DC/AC and several transmission of electricity branch roads;
The DC side of each described exchange grid-connected converter DC/AC is connected to the output of described dc bus row respectively by independent air-break;The AC of each described exchange grid-connected converter DC/AC is connected to the input of described AC bus bar respectively by independent air-break;The output of described AC bus bar is parallel with several transmission of electricity branch roads, and each described transmission of electricity branch road is mounted on an independent air-break;Each described transmission of electricity branch road uses electrical interface for be connected to boats and ships;
It addition, each described exchange grid-connected converter DC/AC and described AC bus bar are all connected to described bank electric management system.
The shipping shore power system being combined electrical network based on alternating current-direct current the most according to claim 6, it is characterised in that also include: several described fixed power supplies are connect and connected by disconnecting switch between the AC bus bar of ship unit;Described AC bus bar is laid in the independent trough of harbour buried cable ditch;
Described dc bus row be laid in the independent trough of harbour buried cable ditch equally;Further, the dc bus that described dc bus row is connected by disconnecting switch by several forms;Described dc bus row is reserved with the interface for being connected with controlled AC/DC rectifier and for the interface being connected with exchange grid-connected converter DC/AC every setpoint distance.
The shipping shore power system being combined electrical network based on alternating current-direct current the most according to claim 6, it is characterised in that be also in series with step-up transformer on each described transmission of electricity branch road.
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CN107800136A (en) * 2017-11-20 2018-03-13 苏州沪港科技股份有限公司 A kind of centralized ship shore electric electric power system
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