CN211320939U - Low-voltage shore power system comprising wind-solar energy storage unit - Google Patents
Low-voltage shore power system comprising wind-solar energy storage unit Download PDFInfo
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- CN211320939U CN211320939U CN201922466410.6U CN201922466410U CN211320939U CN 211320939 U CN211320939 U CN 211320939U CN 201922466410 U CN201922466410 U CN 201922466410U CN 211320939 U CN211320939 U CN 211320939U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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Abstract
The utility model relates to a contain low pressure bank electricity system that scene stored up unit, include: the system comprises a wind power generation unit, a photovoltaic power generation unit, an on-shore alternating-current high-voltage bus, a power energy storage unit, a port load, a voltage and frequency conversion system, a bidirectional converter and isolation transformer, a shore power connection box, a cable management system and corresponding electrical secondary equipment. The utility model has the advantages that: the utility model relates to a rationally, the bank electricity system is succinct, can provide the power of different voltage levels, frequency class for a plurality of berths simultaneously, and power supply efficiency is high, effectively absorbs renewable energy and generates electricity, reduces vary voltage frequency conversion system's independent investment, simultaneously through energy storage system's the function of filling in the millet of clipping the peak, reduce the kilowatt-hour cost by a wide margin, can satisfy the demand that coastal port and inland river harbour berth boats and ships used the bank electricity, and it is swift convenient to use, can improve the practicality and the economic nature of bank electricity system.
Description
Technical Field
The utility model relates to an electric power tech field especially includes a low pressure bank electric system who contains scene storage unit.
Background
During the operation of ships at ports, in order to maintain the production and living needs, the auxiliary fuel generator on the ship is usually used for generating electricity to provide necessary power, however, during the fuel consumption process of the auxiliary generator, pollutants such as smoke, waste gas and inhalable particles discharged from the auxiliary generator seriously damage the ecological environment of the port area and the surrounding environment. According to statistics, carbon emission generated by auxiliary generators of ships during berthing at ports accounts for 40-70% of total carbon emission of the ports, and the carbon emission is an important factor influencing air quality of the ports and the cities. The International Maritime Organization (IMO) estimates that ships emit 2 and 200 times as much carbon dioxide and sulfur oxides annually as automobiles worldwide. And, this number is still growing. Through the ship shore power system, the ship can completely turn off the ship-mounted fuel oil power generation equipment during port berthing, and then uses a shore-based power supply for supplying power, thereby completely preventing the ship from discharging carbon dioxide (CO) to a port area2) Sulfide (SO)x) Nitrogen Oxide (NO)x) And Particulate Matter (PM) and the like. According to the measurement and calculation, if all ships shut down the ship-mounted fuel oil generators during port berthing and use shore power instead, about ten thousand tons of carbon dioxide emission can be reduced every year, and about 130 ten thousand tons of sulfur dioxide emission can be reduced, which accounts for about 1.36 percent and 5.4 percent of the total amount of carbon dioxide and sulfur dioxide emission in China. Thus, the transfer of shore power systems during the operation of ships in port is considered to be the best way to solve the problem of ship exhaust pollution. The low-voltage shore power is an onshore ship power supply system with a shore power supply rated output alternating current voltage of 1kV or below and a power supply capacity range of 100-1000 kVA.
At present, shore power systems at home and abroad are largely applied with independent voltage transformation and frequency conversion devices to carry out voltage transformation and frequency conversion on port alternating current buses so as to meet the differentiated requirements of different ship power systems. For example, patent CN 106026181B discloses a ship shore power system, wherein a voltage transformation and frequency conversion device and a reverse flow prevention device are respectively connected to a ship, and are used for receiving the converted voltage from the voltage transformation and frequency conversion device, receiving the ship voltage of a ship power supply system from the ship, and adjusting the output of the voltage transformation and frequency conversion device or the output of the ship power supply system. Patent CN 208508532U discloses a ship shore power system, which includes shore power incoming cabinet, voltage transformation device, frequency conversion device, power supply cable, shore power junction box, cable reel, cable on board, and city power supply bus is led into the input end of voltage transformation device and/or the input end of frequency conversion device through shore power incoming cabinet. The above patents do not consider the access problem of new energy (wind-solar power generation) in ports, do not fully utilize energy storage devices, need to invest and construct a large amount of frequency modulation and voltage regulation systems, and have complex structures and poor economical efficiency.
At present, the development of shore power application in China has the following two main problems: the first is the ship-shore technical matching problem. Because a domestic power system and a power system of an international sailing ship have certain technical difference, the existing shore power facility has certain problems in the construction and use processes and needs a large amount of frequency and voltage conversion facilities; and the economical problem of shore power utilization is solved. The electricity prices of ports in provinces and direct municipalities in the country are not uniform, and the electricity selling price difference from each port operation unit to the ship is large; the price subsidy and policy guidance difference of the governments in various regions on the shore power used by ships are huge; the economic benefit of shore power is not obvious.
In summary, it is very important to provide a low-voltage shore power system including a wind-solar energy storage unit.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the not enough among the prior art, provide a contain low pressure bank electric system that scene stores up unit
The low-voltage shore power system comprising the wind-solar energy storage unit comprises: the system comprises a wind power generation unit, a photovoltaic power generation unit, an onshore alternating-current high-voltage bus, a power energy storage unit, a port load, a voltage and frequency conversion system, a bidirectional converter and isolation transformer, a shore power connection box, a cable management system and corresponding electrical secondary equipment;
the shore power connection box and the shore power connection box in the cable management system are an alternating current distribution system arranged at a port and a wharf, and the cable management system in the shore power connection box and the cable management system is equipment for controlling a shore cable to be wound and unwound in a reel in a shore ship connection process; shore power connection box and cable management system include: a shore power connection box and cable management system # A, a shore power connection box and cable management system # B and a shore power connection box and cable management system # C;
the output end of the wind power generation unit is connected to an on-shore alternating-current high-voltage bus through a booster transformer; the output end of the photovoltaic power generation unit is connected to an onshore alternating current high-voltage bus through a photovoltaic inverter;
the power energy storage unit is connected to an on-shore alternating-current high-voltage bus through a bidirectional converter and an isolation transformer; the power energy storage unit is connected with a shore power connection box and a cable management system # C through a bidirectional converter and an isolation transformer;
the voltage and frequency conversion system is connected with a shore power connection box and a cable management system # B through a cable; the voltage and frequency conversion system is connected with an on-shore alternating current high-voltage bus through a cable;
and the shore power connection box and the cable management system # A are also connected to the shore alternating-current high-voltage bus.
Preferably, the port load is connected to an on-shore ac high-voltage bus.
Preferably, the isolation transformer in the bidirectional converter and the isolation transformer adopts a solid-state switch switching tap.
Preferably, the power energy storage unit is a lithium ion battery, a flow battery, a super capacitor or an energy storage flywheel.
The utility model has the advantages that: the utility model relates to a rationally, the bank electricity system is succinct, can provide the power of different voltage levels, frequency class for a plurality of berths simultaneously, and power supply efficiency is high, effectively absorbs renewable energy and generates electricity, reduces vary voltage frequency conversion system's independent investment, simultaneously through energy storage system's the function of filling in the millet of clipping the peak, reduce the kilowatt-hour cost by a wide margin, can satisfy the demand that coastal port and inland river harbour berth boats and ships used the bank electricity, and it is swift convenient to use, can improve the practicality and the economic nature of bank electricity system.
Drawings
Fig. 1 is a system configuration diagram of a low-voltage shore power system including a wind-solar storage unit.
Description of reference numerals: the system comprises a 110KV alternating current bus 1, a wind power generation unit 2, a photovoltaic power generation unit 3, a shore alternating current high-voltage bus 4, a port load 5, a shore power connection box and cable management system # A6, a shore power connection box and cable management system # B7, a shore power connection box and cable management system # C8, a voltage and frequency transformation and conversion system 9, an energy storage unit 10, a bidirectional converter and an isolation transformer 11.
Detailed Description
The present invention will be further described with reference to the following examples. The following description of the embodiments is merely provided to aid in understanding the invention. It should be noted that, for those skilled in the art, the present invention can be modified in several ways without departing from the principle of the present invention, and these modifications and modifications also fall into the protection scope of the claims of the present invention.
The low-voltage shore power system comprising the wind-solar energy storage unit comprises: the system comprises a wind power generation unit 2, a photovoltaic power generation unit 3, a shore alternating current high-voltage bus 4, a power energy storage unit 10, a port load 5, a voltage and frequency conversion system 9, a bidirectional converter and isolation transformer 11, a shore power connection box, a cable management system and corresponding electrical secondary equipment;
the shore power connection box and the shore power connection box in the cable management system are an alternating current distribution system arranged at a port and a wharf, and the cable management system in the shore power connection box and the cable management system is equipment for controlling a shore cable to be wound and unwound in a reel in a shore ship connection process; shore power connection box and cable management system include: a shore power connection box and cable management system # A6, a shore power connection box and cable management system # B7 and a shore power connection box and cable management system # C8;
the output end of the wind power generation unit 2 is connected to an on-shore alternating-current high-voltage bus 4 through a booster transformer; the output end of the photovoltaic power generation unit 3 is connected to an onshore alternating-current high-voltage bus 4 through a photovoltaic inverter;
the power energy storage unit 10 is connected to the shore alternating-current high-voltage bus 4 through a bidirectional converter and an isolation transformer 11; the power energy storage unit 10 is connected with a shore power connection box and a cable management system # C8 through a bidirectional converter and an isolation transformer 11;
the voltage and frequency conversion system 9 is connected with a shore power connection box and a cable management system # B7 through a cable; the voltage and frequency conversion system 9 is connected with the shore alternating current high-voltage bus 4 through a cable;
and the shore power connection box and the cable management system # A6 are further connected to the shore alternating-current high-voltage bus 4.
And the port load 5 is connected to an on-shore alternating-current high-voltage bus 4.
The bidirectional converter and the isolation transformer in the isolation transformer 11 adopt a solid-state switch switching tap.
The power energy storage unit 10 is a lithium ion battery, a flow battery, a super capacitor or an energy storage flywheel.
Wind power generation and photovoltaic power generation in the system can be supplied to port loads 5 and stop ships for on-site use through a 10kV shore alternating current high-voltage bus 4, and can also be connected to a power energy storage unit for use in power utilization peak periods.
The energy storage system can charge when the electricity price is lower through the power grid, discharge when the electricity price is higher, and obtain the electric charge income while playing the functions of peak clipping and valley filling.
At different time intervals, ships with different voltage specification grades can be selectively connected into different shore power connection boxes through a cable management system.
In China, ships usually use 380V/50Hz power supplies, but the power frequency of many foreign ships is usually 60Hz, and the voltage is 440V.
For the ships with 380V/50Hz voltage level, an energy storage system (a shore power connection box and a cable management system # C8) can be connected when the electricity price is high in the daytime, and the electricity stored when the electricity price is low at night is fully utilized. At night when the electricity price is low, the ships can be directly connected into a 10kV shore alternating current high-voltage bus 4 (a shore power connection box and a cable management system # A6) through a transformer.
For the ship with the voltage grade of 440V/60Hz, when the electricity price is lower at night, electricity can be taken from a 10kV shore alternating-current high-voltage bus 4 through a voltage transformation and frequency conversion system (a shore power connection box and a cable management system # B7). When the electricity price is higher in the daytime, an energy storage system (a shore power connection box and a cable management system # C8) can be connected, and the electricity stored in the night off-peak electricity price is fully utilized. At this time, the voltage-regulating and frequency-modulating functions of the energy storage system bidirectional converter and the isolation transformer can be fully utilized.
Claims (4)
1. A low voltage shore power system comprising a wind-solar storage unit, comprising: the system comprises a wind power generation unit (2), a photovoltaic power generation unit (3), a shore alternating current high-voltage bus (4), a power energy storage unit (10), a port load (5), a voltage and frequency conversion system (9), a bidirectional converter and isolation transformer (11), a shore power connection box, a cable management system and corresponding electrical secondary equipment;
the shore power connection box and the shore power connection box in the cable management system are an alternating current distribution system arranged at a port and a wharf, and the cable management system in the shore power connection box and the cable management system is equipment for controlling a shore cable to be wound and unwound in a reel in a shore ship connection process; shore power connection box and cable management system include: a shore power connection box and cable management system # A (6), a shore power connection box and cable management system # B (7) and a shore power connection box and cable management system # C (8);
the output end of the wind power generation unit (2) is connected to an on-shore alternating current high-voltage bus (4) through a booster transformer; the output end of the photovoltaic power generation unit (3) is connected to an on-shore alternating-current high-voltage bus (4) through a photovoltaic inverter;
the power energy storage unit (10) is connected to an on-shore alternating-current high-voltage bus (4) through a bidirectional converter and an isolation transformer (11); the power energy storage unit (10) is connected with a shore power connection box and a cable management system # C (8) through a bidirectional converter and an isolation transformer (11);
the variable voltage and variable frequency system (9) is connected with a shore power connection box and a cable management system # B (7) through a cable; the voltage and frequency conversion system (9) is connected with an on-shore alternating current high-voltage bus (4) through a cable;
and the shore power connection box and the cable management system # A (6) are also connected to the shore alternating-current high-voltage bus (4).
2. The low-voltage shore power system comprising a wind-solar storage unit according to claim 1, wherein: and the port load (5) is connected to an on-shore alternating current high-voltage bus (4).
3. The low-voltage shore power system comprising a wind-solar storage unit according to claim 1, wherein: and the isolation transformer in the bidirectional converter and the isolation transformer (11) adopts a solid-state switch switching tap.
4. The low-voltage shore power system comprising a wind-solar energy storage unit according to claim 1, characterized in that the power energy storage unit (10) is a lithium ion battery, a flow battery, a super capacitor or an energy storage flywheel.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922466410.6U CN211320939U (en) | 2019-12-31 | 2019-12-31 | Low-voltage shore power system comprising wind-solar energy storage unit |
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| CN201922466410.6U CN211320939U (en) | 2019-12-31 | 2019-12-31 | Low-voltage shore power system comprising wind-solar energy storage unit |
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| CN211320939U true CN211320939U (en) | 2020-08-21 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112529468A (en) * | 2020-12-25 | 2021-03-19 | 力容新能源技术（天津）有限公司 | Operation mode method of shore power energy storage system and economic evaluation method thereof |
| CN112865112A (en) * | 2021-03-18 | 2021-05-28 | 国核电力规划设计研究院有限公司 | Energy storage type shore power system for port |
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2019
- 2019-12-31 CN CN201922466410.6U patent/CN211320939U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112529468A (en) * | 2020-12-25 | 2021-03-19 | 力容新能源技术（天津）有限公司 | Operation mode method of shore power energy storage system and economic evaluation method thereof |
| CN112865112A (en) * | 2021-03-18 | 2021-05-28 | 国核电力规划设计研究院有限公司 | Energy storage type shore power system for port |
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