CN111525682A - High-efficiency shore power supply device with uninterrupted power supply - Google Patents
High-efficiency shore power supply device with uninterrupted power supply Download PDFInfo
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- CN111525682A CN111525682A CN202010496245.3A CN202010496245A CN111525682A CN 111525682 A CN111525682 A CN 111525682A CN 202010496245 A CN202010496245 A CN 202010496245A CN 111525682 A CN111525682 A CN 111525682A
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- 230000002457 bidirectional effect Effects 0.000 claims abstract description 32
- 238000004146 energy storage Methods 0.000 claims abstract description 12
- 230000003068 static effect Effects 0.000 claims description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims 1
- 239000002253 acid Substances 0.000 claims 1
- 239000003990 capacitor Substances 0.000 claims 1
- 229910001416 lithium ion Inorganic materials 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 abstract description 5
- 230000005611 electricity Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/08—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems requiring starting of a prime-mover
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
- H02M7/66—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output with possibility of reversal
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Abstract
The invention discloses a high-efficiency shore power supply device with uninterrupted power supply, which comprises an onshore part and an shipboard part, wherein the onshore part and the shipboard part are respectively a wharf commercial power module, automatic controllable closing and opening devices S1 and S2, automatic controllable closing and opening devices S3 and S4, a bidirectional converter U1, an energy storage battery E, a cable management device P and a marine diesel generator M. The invention can realize that: 1. the commercial power of the wharf and the diesel generator on the ship are switched uninterruptedly; 2. the invention can realize the power failure of the wharf commercial power and the uninterrupted power supply of the shipboard load during the period that the shore power supply supplies power to the ship. 3. The invention can be used for energy storage function and realize peak clipping and valley filling functions; 4. the income can be increased by peak clipping and valley filling of the commercial power; 5. the invention can realize that the commercial power directly supplies power to the load without passing through the power conversion device, and the scheme of the frequency converter is that the commercial power supplies power to the load after passing through the frequency converter. The electric energy conversion efficiency of the frequency converter is about 95 percent. The commercial power is directly supplied without a power conversion device, and the power supply efficiency can be improved by about 5 percent.
Description
Technical Field
The invention relates to the technical field of power supplies, in particular to a high-efficiency shore power supply device with uninterrupted power supply.
Background
Marine diesel generators are used to power hull equipment during ship docking prior to shore power application. The diesel generator releases a large amount of carbon dioxide, smoke particles and noise, which causes severe pollution to wharfs. Under the background of the energy-saving and environment-friendly era, during the ship harboring period, the electricity consumption of ship body equipment needs to be converted from a ship diesel generator to wharf shore electricity, namely a shore electricity power supply.
The domestic wharf commercial power comes from a municipal power grid with the frequency of 50 HZ. The electric equipment on the ship has 50HZ or 60 HZ. And if the power utilization equipment on the ship is 60HZ, the shore power commercial power outputs 60HZ alternating current to supply power to the load on the ship through the frequency converter.
The on-board power supply for 50HZ port and wharf generally has two modes at present. The first is that the commercial power is directly sent to the ship at the wharf, and the commercial power is called as commercial power for short.
The commercial power on-board device has the advantages of simple structure and low cost. But has two disadvantages.
1. The marine diesel generator power supply and the shore commercial power supply are two sets of power supplies, and when the power supply of the marine equipment needs to be switched to the commercial power supply, the diesel generator power supply loop needs to be disconnected first, and then the commercial power supply loop needs to be closed. Thus, in the time interval from the opening of the diesel engine circuit to the closing of the mains supply circuit, the electrical equipment on the ship is powered off, i.e. is supplied intermittently.
2. And when the commercial power of the wharf is cut off, the power utilization equipment on the ship is also cut off.
And the second is that the commercial power at the wharf is sent to the ship through a frequency converter. The variable frequency power supply is called as a variable frequency power supply for shipping.
The variable frequency power supply has the advantages that the commercial power of 50HZ can be converted into a 60HZ power supply through the frequency converter, and 60HZ electric equipment on a ship can be supplied with power. But has two disadvantages.
1. The frequency converter is connected in series between the commercial power and the electric equipment, and the efficiency of the frequency converter is generally about 95%, so that 5% of electric energy is generated and lost.
2. And when the mains supply is powered off, the frequency converter is also closed, and the electric equipment is also powered off. .
Disclosure of Invention
The present invention is directed to a high efficiency shore power system with uninterrupted power supply, so as to solve the above problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme:
a high-efficiency shore power supply device with uninterrupted power supply comprises an onshore part and a shipboard part, wherein the onshore part comprises a wharf commercial power module, an automatic controllable closing and opening device S1, an automatic controllable closing and opening device S2, a bidirectional converter U1, a cable management device P and an energy storage battery E, the shipboard part comprises an automatic controllable closing and opening device S3, an automatic controllable closing and opening device S4 and a marine diesel generator M, the output of the wharf commercial power module is connected with the automatic controllable closing and opening device S1 through a circuit breaker K1, the other end of the automatic controllable closing and opening device S1 is respectively connected with the automatic controllable closing and opening device S2 and the circuit breaker K2, the other end of the circuit breaker K2 is connected with the cable management device P, the other end of the cable management device P is connected with a power plug J1, the other end of the automatic controllable closing and opening device S2 is connected with the bidirectional converter U1, the other end of the bidirectional converter U1 is connected with an energy storage battery E, the diesel generator M is connected with shipboard electric equipment and an automatic controllable on-off device S3 sequentially through an on-off switch K4 and an automatic controllable on-off device S4, the other end of the automatic controllable on-off device S3 is connected with a cable socket J2 through an on-off switch K3, and the cable socket J2 is detachably connected with a power plug J1.
As a further technical scheme of the invention: the automatic controllable closing and opening device S1, the automatic controllable closing and opening device S2, the automatic controllable closing and opening device S3 and the automatic controllable closing and opening device S4 adopt electronic switches.
As a further technical scheme of the invention: the cable management device P is provided with a winding device.
As a further technical scheme of the invention: and the bidirectional converter U1 is connected with a control system.
As a further technical scheme of the invention: the control system is also respectively connected with an automatic controllable closing and opening device S1, an automatic controllable closing and opening device S2, an automatic controllable closing and opening device S3, an automatic controllable closing and opening device S4, a circuit breaking switch K1, a circuit breaking switch K2, a circuit breaking switch K3 and a circuit breaking switch K4.
As a further technical scheme of the invention: the automatic controllable on-off device S1, the automatic controllable on-off device S2, the automatic controllable on-off device S3, the automatic controllable on-off device S4 are ac contactors, electrically operated circuit breakers or static transfer switches SCR.
Compared with the prior art, the invention has the beneficial effects that: 1. the invention can realize the uninterrupted switching between the wharf commercial power and the shipboard diesel generator; 2. the power is cut off during the power supply of the wharf shore power, the load on the ship is cut off in the traditional scheme, and the load on the ship can be supplied with power uninterruptedly by the invention; 3. the invention can be used for energy storage function, and realize peak clipping and valley filling functions; 4. the income can be increased by peak clipping and valley filling of the commercial power; 5. the invention provides a method for directly supplying power to a load without a power conversion device, and the scheme of a frequency converter is that the frequency converter is connected between the commercial power and the load in series. The electric energy conversion efficiency of the frequency converter is about 95 percent. The invention can improve the power supply efficiency by about 5 percent.
Drawings
Fig. 1 is a schematic diagram of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, embodiment 1: a high-efficiency shore power supply device with uninterrupted power supply comprises an onshore part and a shipboard part, wherein the onshore part comprises a wharf commercial power module, an automatic controllable closing and opening device S1, an automatic controllable closing and opening device S2, a bidirectional converter U1, a cable management device P and an energy storage battery E, the shipboard part comprises an automatic controllable closing and opening device S3, an automatic controllable closing and opening device S4 and a marine diesel generator M, the output of the wharf commercial power module is connected with the automatic controllable closing and opening device S1 through a circuit breaker K1, the other end of the automatic controllable closing and opening device S1 is respectively connected with the automatic controllable closing and opening device S2 and the circuit breaker K2, the other end of the circuit breaker K2 is connected with the cable management device P, the other end of the cable management device P is connected with a power plug J1, the other end of the automatic controllable closing and opening device S2 is connected with the bidirectional converter U1, the other end of the bidirectional converter U1 is, the diesel generator M is connected with shipboard electric equipment and the automatic controllable closing and opening device S3 sequentially through the disconnecting switch K4 and the automatic controllable closing and opening device S4, the other end of the automatic controllable closing and opening device S3 is connected with the cable socket J2 through the disconnecting switch K3, and the cable socket J2 is detachably connected with the power plug J1.
The automatic controllable closing and opening device S1, the automatic controllable closing and opening device S2, the automatic controllable closing and opening device S3, and the automatic controllable closing and opening device S4 employ electronic switches. The cable management device P is provided with a winding device. And the bidirectional converter U1 is connected with a control system. The control system is also respectively connected with an automatic controllable closing and opening device S1, an automatic controllable closing and opening device S2, an automatic controllable closing and opening device S3, an automatic controllable closing and opening device S4, a circuit breaking switch K1, a circuit breaking switch K2, a circuit breaking switch K3 and a circuit breaking switch K4.
The working principle is as follows:
the method for switching the shipboard diesel generator to the wharf commercial power uninterruptedly comprises the following steps:
when the shore power supply system receives a power transmission request, the automatic controllable closing and opening device S1 and the automatic controllable closing and opening device S2 are opened, so that the plug is not electrified.
Plug J1 is not electrically plugged into socket J2.
When the plug and the socket are connected, the bidirectional converter U1 is started, and the automatic controllable closing and opening device S2 is closed.
And automatically detecting the amplitude, the frequency and the phase of the alternating current of the diesel generator M. The bidirectional converter U1 automatically adjusts the amplitude, frequency and phase of the output voltage and automatically locks the phase for synchronization.
Closing the automatic controllable closing and opening device S3, and merging the bidirectional converter U1 into the power grid of the ship diesel generator M.
And opening the automatic controllable closing and opening device S4, and switching the bidirectional converter U1 to an off-grid mode to supply power to the load continuously.
And automatically detecting the amplitude, the frequency and the phase of the quay power commercial power. The bidirectional converter U1 automatically adjusts the amplitude, frequency and phase of the output voltage and automatically locks the phase for synchronization.
And closing an automatic controllable closing and opening device S1, and merging the bidirectional converter U1 into a wharf commercial power grid.
The control system adjusts the output power of the bidirectional converter U1, so that the load of the electric equipment on the ship is gradually supplied with power by the wharf commercial power. The utility model realizes that the commercial power of the wharf can supply power to the load on the ship uninterruptedly.
The method for switching the dock commercial power to the shipboard diesel generator uninterruptedly comprises the following steps:
when the shore power supply system receives a shore power supply stopping request, the control system sends a diesel generator starting signal. The diesel generator is started without load.
And an automatic controllable closing and opening device S1 is opened, and the bidirectional converter U1 is in off-grid operation and supplies power to the load through the U1.
The amplitude, frequency and phase of the diesel generator are automatically detected. The bidirectional converter U1 automatically adjusts the amplitude, frequency and phase of the output voltage and automatically locks the phase for synchronization.
Closing the automatic controllable closing and opening device S4, and merging the bidirectional converter U1 and the bidirectional converter U1 into a diesel generator power grid on the ship.
The control system adjusts the output power of the bidirectional converter, so that the load of the shipboard electric equipment is gradually supplied with power by the diesel generator.
And the automatic controllable closing and opening device is opened S3, the automatic controllable closing and opening device is opened S2, and the plug is not electrified and is pulled out of the socket.
The bidirectional converter U1 is activated to close the automatically controllable close-open device S2.
And automatically detecting the amplitude, frequency and phase of the shore power commercial power. The bidirectional converter U1 automatically adjusts the amplitude, frequency and phase of the output voltage and automatically locks the phase for synchronization.
And an automatic controllable closing and opening device S1 is closed, and a bidirectional converter U1 is connected to the wharf commercial power.
The other two working states are used during the period that the wharf commercial power supplies power to the load;
1. energy storage, peak clipping and valley filling:
the commercial power price of the wharf comprises daily peak value electricity price and valley value electricity price. During grid-connected operation of the commercial power of the wharf, the bidirectional converter U1 charges the energy storage battery E through the bidirectional converter U1 when the commercial power is in a valley power price time period, and discharges the energy storage battery E to the commercial power through the bidirectional converter U1 when the commercial power is in a peak power price time period, so that peak-valley price difference income is realized.
2. During the time that the dock commercial power supplies power for the shipboard load, the dock commercial power is out of power, and the load is uninterruptedly supplied power:
when the wharf commercial power is in power failure when the wharf commercial power supplies power to the shipboard load, the bidirectional converter U1 is converted from a grid-connected mode to an off-grid mode, and the shipboard load supplies power uninterruptedly.
Embodiment 2, on the basis of embodiment 1, the automatic controllable closing and opening device S1, the automatic controllable closing and opening device S2, the automatic controllable closing and opening device S3 and the automatic controllable closing and opening device S4 are ac contactors, charged circuit breakers or static transfer switches SCR.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (7)
1. A high-efficiency shore power supply device with uninterrupted power supply comprises an onshore part and a shipboard part, wherein the onshore part comprises a wharf commercial power module, an automatic controllable closing and opening device S1, an automatic controllable closing and opening device S2, a bidirectional converter U1, a cable management device P and an energy storage battery E, the shipboard part comprises an automatic controllable closing and opening device S3, an automatic controllable closing and opening device S4 and a marine diesel generator M, and the shore power supply device is characterized in that the wharf commercial power is connected with the automatic controllable closing and opening device S1 through a circuit breaker K1, the other end of the automatic controllable closing and opening device S1 is respectively connected with an automatic controllable closing and opening device S2 and a circuit breaker K2, the other end of the circuit breaker K2 is connected with the cable management device P, the other end of the cable management device P is connected with a power plug J1, the other end of the automatic controllable closing and opening device S2 is connected with the bidirectional converter U, the other end of the bidirectional converter U1 is connected with an energy storage battery E, the diesel generator M is connected with shipboard electric equipment and an automatic controllable on-off device S3 sequentially through an on-off switch K4 and an automatic controllable on-off device S4, the other end of the automatic controllable on-off device S3 is connected with a cable socket J2 through an on-off switch K3, and the cable socket J2 is detachably connected with a power plug J1.
2. An uninterruptedly powered high efficiency shore power supply unit as claimed in claim 1, wherein electronic switches are used for said automatic controllable closing and opening device S1, S2, S3 and S4.
3. An uninterruptedly powered high efficiency shore power supply unit as claimed in claim 1, wherein said energy storage battery E is a lead acid battery, a lithium ion battery, a flow battery or a super capacitor.
4. An uninterruptedly powered, high efficiency shore power supply unit, as recited in claim 1, wherein said cable management unit P is provided with a winder.
5. The uninterruptible power supply high-efficiency shore power supply unit as claimed in claim 1, wherein a control system is connected to said bidirectional converter U1.
6. An uninterruptible power supply high efficiency shore power supply unit according to claim 5, wherein said control system is further connected to automatic controllable on-off device S1, automatic controllable on-off device S2, automatic controllable on-off device S3, automatic controllable on-off device S4, circuit breaker K1, circuit breaker K2, circuit breaker K3 and circuit breaker K4, respectively.
7. An uninterruptedly powered, high efficiency shore power supply unit as claimed in any of claims 1 to 6, wherein said automatic controllable closing and opening device S1, S2, S3, S4 are ac contactors, live operated circuit breakers or static transfer switches SCR.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010496245.3A CN111525682B (en) | 2020-06-03 | 2020-06-03 | Uninterrupted power supply's high efficiency shore power supply unit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010496245.3A CN111525682B (en) | 2020-06-03 | 2020-06-03 | Uninterrupted power supply's high efficiency shore power supply unit |
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| CN111525682A true CN111525682A (en) | 2020-08-11 |
| CN111525682B CN111525682B (en) | 2024-08-27 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112260109A (en) * | 2020-10-28 | 2021-01-22 | 西安中车永电电气有限公司 | High-protection double-electric shore power box |
| 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 |
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| DE102005056699A1 (en) * | 2005-11-28 | 2007-06-06 | Siemens Ag | Universal shore connection ship has converter which is installed onboard ship and connected to shore-side power supply line by switched electrical line |
| CN104037927A (en) * | 2014-04-22 | 2014-09-10 | 上海南车汉格船舶工程有限公司 | Marine electric power system capable of supplying power by novel hybrid power source |
| CN105720679A (en) * | 2016-04-08 | 2016-06-29 | 南京南瑞继保电气有限公司 | Hybrid shore power variable frequency power supply system |
| CN110571915A (en) * | 2019-09-19 | 2019-12-13 | 浙江工业大学 | An intelligent energy storage power supply vehicle uninterruptible power supply system device and control method thereof |
| CN212063622U (en) * | 2020-06-03 | 2020-12-01 | 深圳迈格瑞能技术有限公司 | High-efficiency shore power supply device with uninterrupted power supply |
-
2020
- 2020-06-03 CN CN202010496245.3A patent/CN111525682B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005056699A1 (en) * | 2005-11-28 | 2007-06-06 | Siemens Ag | Universal shore connection ship has converter which is installed onboard ship and connected to shore-side power supply line by switched electrical line |
| CN104037927A (en) * | 2014-04-22 | 2014-09-10 | 上海南车汉格船舶工程有限公司 | Marine electric power system capable of supplying power by novel hybrid power source |
| CN105720679A (en) * | 2016-04-08 | 2016-06-29 | 南京南瑞继保电气有限公司 | Hybrid shore power variable frequency power supply system |
| CN110571915A (en) * | 2019-09-19 | 2019-12-13 | 浙江工业大学 | An intelligent energy storage power supply vehicle uninterruptible power supply system device and control method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112260109A (en) * | 2020-10-28 | 2021-01-22 | 西安中车永电电气有限公司 | High-protection double-electric shore power box |
| 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 |
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