CN113991624A - Non-self-powered ship shore ship integrated power distribution system - Google Patents
Non-self-powered ship shore ship integrated power distribution system Download PDFInfo
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- CN113991624A CN113991624A CN202111294074.7A CN202111294074A CN113991624A CN 113991624 A CN113991624 A CN 113991624A CN 202111294074 A CN202111294074 A CN 202111294074A CN 113991624 A CN113991624 A CN 113991624A
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- ship
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- power supply
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
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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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/26—Arrangements for eliminating or reducing asymmetry in polyphase networks
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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
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
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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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Laying Of Electric Cables Or Lines Outside (AREA)
Abstract
A non-self-powered ship shore-ship integrated power distribution system comprises a shore power supply side, a ship power utilization side and an isolation transformer, wherein the isolation transformer is connected between the shore power supply side and the ship power utilization side, and one end of the isolation transformer and one end of the ship power utilization side are connected in a triangular mode; the danger that the voltage of single-phase equipment and equipment for protecting zero position is instantly increased, dangerous voltage is generated and damage is caused when the neutral line is broken when the neutral line is applied during the connection of the electricity utilization side on the ship is avoided; meanwhile, the power distribution system is flexible and convenient to use, so that the shore power utilization side of the wharf does not need to be modified for the power utilization side on the ship, and the cost is saved.
Description
Technical Field
The invention relates to the field of ships, in particular to a non-self-powered ship shore-ship integrated power distribution system.
Background
The non-self-powered ship is mainly powered by an on-shore power supply because the ship does not have a generator. The marine ac power supply is generally of a three-phase three-wire system, while the shore power ac power supply is generally of a three-phase four-wire system or a three-phase five-wire system. If shore power is directly supplied to the ship, the power supply system is not matched, so that the connection mode of the power supply system on the ship is changed, and the change of the connection mode of the system can cause new problems. In three-phase four-wire systems, efforts are generally made to keep the three-phase load in a relatively balanced state in order to ensure safe operation of the power supply system. However, in practice, three-phase load balancing is a state that is almost impossible to achieve. Particularly if a neutral line exists in a power supply source on the electricity utilization side of the ship, if the load of a certain phase is too high, the phase current is too large, and the current of the neutral line is too large; b the phase currents look similar due to different load characteristics, but the neutral current is particularly large and even exceeds the phase current.
When the neutral line has a large current, the neutral point will shift, resulting in unstable voltage and current, damage to the device or shortened service life. In a system with a common potential of a working zero line and a protection zero line, the neutral line current is too high, so that the protection grounding in the system is unsafe, and great hidden dangers are brought to the life safety of personnel and the use of equipment. Under the condition of neutral line disconnection, dangerous voltage is generated by single-phase equipment and equipment for protecting zero connection after the neutral line is disconnected, and load equipment is directly damaged. If a short circuit to ground occurs, the peak value of the short circuit current of the three-phase four-wire system is thousands or even tens of thousands of amperes, and large impact is generated on a power grid to cause systematic damage. In a three-phase four-wire ship power system, the phenomenon of neutral line disconnection is a high-probability occurrence event due to cable aging, switch failure, artificial wiring and the like
In addition, the ship stops at different wharfs, the electric system is not matched, the ship stop can be seriously influenced, and if the wharf is refitted, the use cost is greatly increased.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, the technical problem to be solved by the present invention is to provide a non-self-powered ship shore-based integrated power distribution system.
The invention provides a non-self-powered ship shore-ship integrated power distribution system, which comprises an on-shore power supply side, an on-ship power utilization side and an isolation transformer, wherein the isolation transformer is connected between the on-shore power supply side and the on-ship power utilization side, and a triangular connection method is adopted between the isolation transformer and one end of the on-ship power utilization side.
Preferably, the system further comprises a voltage stabilizer, wherein the power inlet end of the voltage stabilizer is connected with the shore power supply side, and the power outlet end of the voltage stabilizer is connected with the power inlet end of the isolation transformer.
Preferably, the power output end of the voltage stabilizer is directly connected with the electricity utilization side on the ship.
As described above, the non-self-powered ship shore-ship integrated power distribution system according to the present invention has the following beneficial effects: isolation transformers are arranged on the shore power supply side and the shipboard power utilization side, wherein the isolation transformers are connected with one end of the shipboard power utilization side in a triangular mode, so that the danger that the voltage of single-phase equipment and equipment for protecting zero position is instantly increased, dangerous voltage is generated and damage is caused due to the fact that neutral wires are disconnected when the shipboard power utilization side is powered is avoided; meanwhile, the power distribution system is flexible and convenient to use, and any wharf can be practical, so that the shore power utilization side of the wharf does not need to conduct line transformation for the shipboard power utilization side, and cost is saved.
Drawings
Fig. 1 is a schematic diagram of a non-self-powered ship shore-based integrated power distribution system according to the present invention.
Description of reference numerals:
10. a shore power supply side; 20. on-board electricity utilization side; 30. a voltage regulator; 40. an isolation transformer; 50. a main distribution board; 60. a distribution box.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms such as "upper", "lower", "left", "right" and "middle" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and changes or modifications of the relative relationship may be made without substantial technical changes.
As shown in fig. 1, an embodiment of a non-self-powered ship-on-shore power distribution system provided by the present invention includes an on-shore power supply side 10, an on-ship power consumption side 20, and an isolation transformer 40, where the isolation transformer 40 is connected between the on-shore power supply side 10 and the on-ship power consumption side 20, and one end of the isolation transformer 40 and the on-ship power consumption side 20 are connected in a delta connection manner.
In the embodiment, the shore power supply side 10 is 380V/50Hz, and a three-wire four-phase system is adopted; the load on the electricity side 20 on the ship is 380V and 220V. Wherein, the single-phase 220V/50Hz load is more. An isolation transformer 40(380V/230V Y-delta or delta-delta) is newly added, the secondary side of the transformer is ensured to be delta-connected, and a three-phase three-wire AC220V 50HZ power supply is output. Therefore, through transformer conversion, a three-phase four-wire system 380V power supply can be changed into a three-phase three-wire system 220V power supply, and power is supplied to a 220V load on a ship. When the voltage is converted, the electricity utilization side 20 on the ship is connected without a neutral line, so that the voltage of single-phase equipment and equipment for protecting the zero position after the neutral line is broken is prevented from being instantly increased to generate dangerous voltage and damage caused by the broken neutral line. Meanwhile, the power distribution system is flexible and convenient to use, and any wharf can be practical, so that the shore power utilization side of the wharf does not need to conduct line transformation for the shipboard power utilization side, and cost is saved.
Further, the power distribution system further comprises a voltage stabilizer 30, wherein the power inlet end of the voltage stabilizer 30 is connected with the shore power supply side 10, and the power outlet end of the voltage stabilizer 30 is connected with the power inlet end of the isolation transformer 40. In order to ensure safe and reliable use of the marine equipment, high requirements are put on the quality of the power grid. The general requirements for electrical quality of ships (refer to CCS steel specifications) are as follows:
| steady state | Transient state | |
| Rated voltage | AC380V+6％～-10％ | +20％～-20％ |
| Frequency of | 50Hz+5％～-5％ | +10％～-10％ |
In an onshore grid, the grid fluctuation is typically large at 380V/50 Hz. According to statistics, the lowest voltage can reach 360V at daytime load peak, and the highest voltage can reach 440V at night load peak. Such voltage changes of shore power may cause damage to ship electrical equipment, and particularly, a control power transformer and a power module in the control power equipment are easily damaged. According to the analysis of the service life of the lamp tube, when the voltage is higher than 10% of the rated voltage of 220V, the service life of the lamp tube is directly halved. Therefore, when the shore power supply voltage reaches 440V, the service life of the lamp tube is seriously influenced.
The use of the voltage stabilizer 30 can ensure the quality of power supply on the shore power utilization side. Specifically, in this embodiment, the voltage stabilizer should meet the following technical criteria: inputting: AC380V +/-20%/50 HZ/three-phase four-wire system; output rated voltage: phase voltage AC220V, line voltage AC 380V; the output center value can be set as a range: the AC380V is adjustable within the range of +/-5 percent; outputting voltage stabilization precision; AC380V + -2.5%.
Of course, the power outlet end of the voltage stabilizer 30 is directly connected to the shipboard power consumption side 20. In this embodiment, 380v load on the ship can be directly connected to the power output end of the voltage stabilizer 30.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (3)
1. The utility model provides a non-self-power supply boats and ships bank integration distribution system, its characterized in that, includes shore power supply side (10), on-board power consumption side (20) and isolation transformer (40), be connected with isolation transformer (40) between shore power supply side (10) and on-board power consumption side (20), isolation transformer (40) and the one end of on-board power consumption side (20) adopt the triangle-shaped to connect the method.
2. A non-self-powered marine shore-based integrated power distribution system according to claim 1, further comprising a voltage stabilizer (30), wherein the power input of the voltage stabilizer (30) is connected to the shore power supply side (10), and the power output of the voltage stabilizer (30) is connected to the power input of the isolation transformer (40).
3. A non-self-powered marine shore-based integrated power distribution system according to claim 2, wherein the power outlet end of the voltage stabilizer (30) is directly connected to the onboard power utilization side (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111294074.7A CN113991624A (en) | 2021-11-03 | 2021-11-03 | Non-self-powered ship shore ship integrated power distribution system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111294074.7A CN113991624A (en) | 2021-11-03 | 2021-11-03 | Non-self-powered ship shore ship integrated power distribution system |
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| Publication Number | Publication Date |
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| CN113991624A true CN113991624A (en) | 2022-01-28 |
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| CN202111294074.7A Pending CN113991624A (en) | 2021-11-03 | 2021-11-03 | Non-self-powered ship shore ship integrated power distribution system |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU11633U1 (en) * | 1999-05-26 | 1999-10-16 | Государственное унитарное предприятие Центральный научно-исследовательский институт "Гранит" | SYSTEM OF POWER SUPPLY OF SHIP RADAR STATION |
| CN201509155U (en) * | 2009-09-23 | 2010-06-16 | 长沙众益电子电器有限公司 | Marine conversion transformer |
| WO2011009285A1 (en) * | 2009-07-22 | 2011-01-27 | Bao Qifan | Movable shore power variable frequency power supply device |
| CN103107537A (en) * | 2013-02-05 | 2013-05-15 | 张建伟 | Shore-based power supplying system |
| CN105743212A (en) * | 2014-12-12 | 2016-07-06 | 浙江国华浙能发电有限公司 | Coastal electricity system for supplying power to ship, and electrical system for ship |
| CN106451469A (en) * | 2016-11-25 | 2017-02-22 | 广州航海学院 | Low-voltage shore power connection voltage control device for long-short cable |
| CN206323151U (en) * | 2016-12-19 | 2017-07-11 | 盐田国际集装箱码头有限公司 | A kind of ship harbour bank electric power system and system group |
| CN206585460U (en) * | 2017-03-10 | 2017-10-24 | 澄瑞电力科技（上海）有限公司 | A kind of high voltage shore power system based on cascaded H-bridges |
| CN113162123A (en) * | 2021-02-09 | 2021-07-23 | 东方日立(成都)电控设备有限公司 | High-low voltage output ship shore power supply device |
-
2021
- 2021-11-03 CN CN202111294074.7A patent/CN113991624A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU11633U1 (en) * | 1999-05-26 | 1999-10-16 | Государственное унитарное предприятие Центральный научно-исследовательский институт "Гранит" | SYSTEM OF POWER SUPPLY OF SHIP RADAR STATION |
| WO2011009285A1 (en) * | 2009-07-22 | 2011-01-27 | Bao Qifan | Movable shore power variable frequency power supply device |
| CN201509155U (en) * | 2009-09-23 | 2010-06-16 | 长沙众益电子电器有限公司 | Marine conversion transformer |
| CN103107537A (en) * | 2013-02-05 | 2013-05-15 | 张建伟 | Shore-based power supplying system |
| CN105743212A (en) * | 2014-12-12 | 2016-07-06 | 浙江国华浙能发电有限公司 | Coastal electricity system for supplying power to ship, and electrical system for ship |
| CN106451469A (en) * | 2016-11-25 | 2017-02-22 | 广州航海学院 | Low-voltage shore power connection voltage control device for long-short cable |
| CN206323151U (en) * | 2016-12-19 | 2017-07-11 | 盐田国际集装箱码头有限公司 | A kind of ship harbour bank electric power system and system group |
| CN206585460U (en) * | 2017-03-10 | 2017-10-24 | 澄瑞电力科技（上海）有限公司 | A kind of high voltage shore power system based on cascaded H-bridges |
| CN113162123A (en) * | 2021-02-09 | 2021-07-23 | 东方日立(成都)电控设备有限公司 | High-low voltage output ship shore power supply device |
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