CN214506553U - New forms of energy and clean energy boats and ships distribution four-wire system - Google Patents
New forms of energy and clean energy boats and ships distribution four-wire system Download PDFInfo
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- CN214506553U CN214506553U CN202022257368.XU CN202022257368U CN214506553U CN 214506553 U CN214506553 U CN 214506553U CN 202022257368 U CN202022257368 U CN 202022257368U CN 214506553 U CN214506553 U CN 214506553U
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Abstract
The utility model discloses a new forms of energy and clean energy boats and ships distribution four-wire system, including direct current distribution network and alternating current distribution network, direct current distribution network includes direct current distribution panel, and this direct current distribution panel is provided with the direct current busbar, alternating current distribution network includes the alternating current distribution panel, the alternating current distribution panel is equipped with three-phase four-wire alternating current busbar, three-phase four-wire alternating current busbar includes three-phase line and zero line, the three-phase line of the AC end of DC/AC module on the input of three-phase line passes through first tertiary switch and the direct current busbar is connected, zero line on the three-phase four-wire alternating current busbar is direct to be connected with the zero line of the AC end of DC/AC module to ground connection, the output of the three-phase line on the three-phase four-wire alternating current busbar passes through second tripolar switch and three-phase AC 380V's consumer is connected; the output end of one of the three phases of the three-phase four-wire AC bus bar is connected with the electric equipment of the single-phase AC220V through a single-pole switch.
Description
Technical Field
The utility model relates to a boats and ships distribution system specifically is a new forms of energy and clean energy boats and ships distribution four-wire system.
Background
With the worldwide shortage of petroleum energy and the upgrade of environmental protection policies, new energy and clean energy power ships develop rapidly. According to different types of applied power energy, the current new energy and clean energy ships mainly adopt a diesel-electric (DG + LIB) hybrid power ship, an LNG fuel power ship, a pure lithium battery (LIB) power ship and the like.
Compared with the traditional single energy system such as a diesel generator, the ship powered by new energy and clean energy usually converts the whole ship energy into electric energy and distributes the energy in a centralized way through a power distribution system, so as to form a direct current power distribution network and an alternating current power distribution network based on a direct current networking technology. A schematic diagram of a typical power distribution system for existing new and clean energy sources is shown in fig. 1.
In fig. 1, the power distribution system includes a dc power distribution network and an ac power distribution network, a dc distribution board is disposed on the dc power distribution network, and an ac distribution board is disposed on the ac power distribution network. LIB and G are main power sources of the ship and are respectively connected to a Direct Current (DC) bus bar in the direct current distribution board through a DC/DC module and an AC/DC module, and the DC (DC) bus bar supplies power to the propulsion motor through the DC/AC module. Because the electricity of the daily electric equipment of the ship is usually three-phase AC380V or single-phase AC220V, the electric equipment of the three-phase AC380V is supplied with power by a Direct Current (DC) bus bar on a direct current distribution network, a DC/AC module and an alternating current distribution network, and then an AC380V bus bar; electric equipment of the single-phase AC220V is supplied with power by a Direct Current (DC) bus on a DC distribution network through a DC/AC module to an AC distribution network, then by an AC380V bus through an AC380V/AC220V transformer and then by an AC220V bus.
The existing new energy and clean energy power ship is equivalent to a traditional alternating current power distribution network, and a direct current power distribution network is added, and the two are used in a network. Because the electric equipment of the single-phase AC220V is supplied with power by the AC380V bus bar, the AC380V/AC220V transformer and the AC220V bus bar after passing through the DC/AC module from the Direct Current (DC) sink on the direct current distribution network to the alternating current distribution network, the electric equipment of the single-phase AC220V has overlong power supply line, more protection nodes, high line fault rate and large line loss.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an effectively improve new forms of energy and clean energy boats and ships distribution four-wire system of electric energy efficiency.
The utility model discloses a new forms of energy and clean energy boats and ships distribution four-wire system, including direct current distribution network and alternating current distribution network, direct current distribution network includes direct current distribution panel, and this direct current distribution panel is provided with the direct current busbar, alternating current distribution network includes the alternating current distribution panel, the alternating current distribution panel is equipped with three-phase four-wire alternating current busbar, three-phase four-wire alternating current busbar includes three-phase line and zero line, the three-phase line of the AC end of DC/AC module on the input of three-phase line passes through first tertiary switch and the direct current busbar is connected, zero line on the three-phase four-wire alternating current busbar is direct to be connected with the zero line of the AC end of DC/AC module to ground connection, the output of the three-phase line on the three-phase four-wire alternating current busbar passes through second tripolar switch and three-phase AC 380V's consumer is connected; the output end of one of the three phases of the three-phase four-wire AC bus bar is connected with the electric equipment of the single-phase AC220V through a single-pole switch.
This new forms of energy and clean energy boats and ships distribution four-wire system, adopt the design of three-phase four-wire on the AC distribution board, the output of the three-phase line on the three-phase four-wire alternating current busbar can directly be the consumer power supply of three-phase AC380V through the second tripolar switch, the output of one of the three-phase line on the three-phase four-wire alternating current busbar directly is the consumer power supply of single-phase AC220V through single pole switch, the traditional mode that the AC380V busbar passes through AC380V/AC220V transformer and is supplied power for the electrical equipment of AC220V by the AC220V busbar again has been cancelled, so the integrated level and the electric energy efficiency of alternating current distribution network equipment have been improved, electric power system's reliability is promoted.
Drawings
FIG. 1 is a schematic diagram of a prior art typical power distribution system for new and clean energy;
fig. 2 is a schematic diagram of a new energy and clean energy ship power distribution four-line system according to a first embodiment of the present invention;
fig. 3 is a schematic diagram of a new energy and clean energy ship power distribution four-line system according to a second embodiment of the present invention;
fig. 4 is a schematic diagram of a new energy and clean energy ship power distribution four-line system according to the third embodiment of the present invention.
Detailed Description
In a first embodiment, as shown in fig. 2, a new energy and clean energy ship distribution four-wire system includes a direct current distribution network and an alternating current distribution network, wherein the direct current distribution network includes a direct current distribution board provided with a direct current busbar, the alternating current distribution network includes an alternating current distribution board provided with a three-phase four-wire alternating current busbar, the three-phase four-wire alternating current busbar includes three phase wires and a zero wire, input ends of the three phase wires are connected with the three phase wires at the AC end of a DC/AC module on the direct current busbar through a first three-level switch QF1, the zero wire on the three-phase four-wire alternating current busbar is directly connected with the zero wire at the AC end of the DC/AC module and is grounded, and output ends of the three phase wires on the three-phase four-wire alternating current busbar are connected with electric equipment of a three-level switch QF2 and a three-phase AC380V through a second three-level switch QF 2; the output end of one of the three phases of the three-phase four-wire AC bus bar is connected with the electric equipment of the single-phase AC220V through a single-pole switch QF 3.
In a second embodiment, as shown in fig. 3, a new energy and clean energy ship distribution four-wire system includes a direct current distribution network and an alternating current distribution network, the direct current distribution network includes a direct current distribution board provided with a direct current busbar, the alternating current distribution network includes an alternating current distribution board provided with a three-phase four-wire alternating current busbar, the three-phase four-wire alternating current busbar includes three phase wires and a zero wire, input ends of the three phase wires are connected with the three phase wires at the AC end of a DC/AC module on the direct current busbar through a first three-stage switch QF1, the zero wire on the three-phase four-wire alternating current busbar is directly connected with the zero wire at the AC end of a DC/AC module, and output ends of the three phase wires on the three-phase four-wire alternating current busbar are connected with electric equipment of a three-phase AC380V through a second three-stage switch QF 2; the output end of one of the three phase lines of the three-phase four-wire AC bus and the zero line of the three-phase four-wire AC bus are connected with the electric equipment of the single-phase AC220V through a bipolar switch QF 4.
Through the design mode that adopts the three-phase four-wire on the AC distribution board, the output of the three-phase line on the three-phase four-wire AC busbar can directly be three-phase AC 380V's consumer through the second tripolar switch power supply, the output of one of the three-phase line on the three-phase four-wire AC busbar directly is single-phase AC 220V's consumer power supply through single pole switch, the traditional mode that the AC380V busbar passes through AC380V/AC220V transformer and is supplied power by AC220V busbar for AC 220V's electrical equipment is cancelled, so the integrated level and the electric energy efficiency of AC distribution network equipment have been improved, the reliability of electric power system is promoted.
In the third embodiment, as shown in fig. 4, an isolation transformer is arranged between the AC terminal of the DC/AC module on the DC bus and the first three-stage switch QF1, a primary coil of the isolation transformer is connected with the AC terminal of the DC/AC module, and a secondary coil of the isolation transformer is connected with the first three-stage switch QF1 and the zero line of the three-phase four-wire AC bus. The existing new energy and clean energy power distribution system has the defects of complicated power transmission network structure, more electrical protection nodes, high line fault rate, energy saving inconvenience and the like in practical application, and is mainly embodied in that the direct-current power distribution network adopts a large number of high-power frequency conversion devices such as DC/DC modules and AC/DC modules, the voltage is directly connected with an AC380V bus bar on the alternating-current power distribution network through the DC/AC modules, so that electric equipment of a three-phase AC380V is easy to be subjected to electromagnetic interference, the service life of the equipment is shortened, and an isolation transformer is arranged between an AC end of the DC/AC module on the direct-current bus bar and a first three-level switch QF1, so that the harmonic pollution of the alternating-current daily power distribution network can be greatly reduced while the electric system requirements are met, and the quality of alternating-current electric energy is improved.
As shown in fig. 2, 3 and 4, a double-pointer voltmeter DV for monitoring the voltages of the secondary coil of the isolation transformer and the voltages of the three-phase four-wire ac busbar is disposed on the ac distribution board, and a voltage selector switch VS for switching the double-pointer voltmeter DV to monitor the voltages of the secondary coil of the isolation transformer and the voltages of the three-phase four-wire ac busbar is disposed on the ac distribution board; the alternating current distribution board is provided with an ammeter A for monitoring current among phases of the three-phase four-wire alternating current busbar, and the alternating current distribution board is provided with a current selection switch AS for switching the ammeter A to monitor current among the phases of the three-phase four-wire alternating current busbar; and a frequency meter HZ for monitoring the frequency of the three-phase four-wire alternating current busbar is arranged on the alternating current distribution board. Current new forms of energy and clean energy distribution system's alternating current distribution board comprises AC380V busbar and AC220V busbar, consequently need set up instruments such as double-set voltmeter, ampere meter, insulation monitor, and its control scheme is loaded down with trivial details, is unfavorable for power supply reliability design and maintenance management, the utility model discloses because only one set of three-phase four-wire alternating current busbar so only need set up a set of voltmeter, instruments such as ampere meter just can accomplish the parameter of the whole required monitoring of monitoring to improve the integrated level and the electric energy efficiency of alternating current distribution network equipment, promoted electric power system's reliability.
The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.
Claims (8)
1. The utility model provides a new forms of energy and clean energy boats and ships distribution four-wire system, includes direct current distribution network and AC distribution network, direct current distribution network includes the direct current distribution board, and this direct current distribution board is provided with the direct current busbar, the AC distribution network includes the AC distribution board, its characterized in that: the alternating current distribution board is provided with a three-phase four-wire alternating current busbar, the three-phase four-wire alternating current busbar comprises three phase lines and a zero line, the input ends of the three phase lines are connected with the three phase lines at the AC end of a DC/AC module on the direct current busbar through a first three-level switch (QF 1), the zero line on the three-phase four-wire alternating current busbar is directly connected with the zero line at the AC end of the DC/AC module and is grounded, and the output ends of the three phase lines on the three-phase four-wire alternating current busbar are connected with electric equipment of three-phase AC380V through a second three-level switch (QF 2); the output end of one of the three phases of the three-phase four-wire AC bus bar is connected with the electric equipment of the single-phase AC220V through a single-pole switch (QF 3).
2. The new and clean energy marine power distribution four-wire system of claim 1, wherein: the output end of one of the three phases of the three-phase four-wire AC bus and the zero line of the three-phase four-wire AC bus are connected with the electric equipment of the single-phase AC220V through a bipolar switch (QF 4).
3. The new and clean energy marine power distribution four-wire system according to any of claims 1-2, wherein: an isolation transformer is arranged between the AC end of the DC/AC module on the direct current bus bar and the first three-stage switch (QF 1), a primary coil of the isolation transformer is connected with the AC end of the DC/AC module, and a secondary coil of the isolation transformer is connected with the first three-stage switch (QF 1) and the zero line of the three-phase four-wire alternating current bus bar.
4. The new and clean energy marine power distribution four-wire system of claim 3, wherein: and the alternating current distribution board is also provided with a double-pointer voltmeter (DV) for monitoring each phase voltage of the secondary coil of the isolation transformer and the three-phase four-wire alternating current busbar.
5. The new and clean energy marine power distribution four-wire system of claim 3, wherein: and an ammeter (A) for monitoring the current between each phase of the three-phase four-wire alternating current busbar is also arranged on the alternating current distribution board.
6. The new and clean energy marine power distribution four-wire system of claim 3, wherein: and the alternating current distribution board is also provided with a frequency meter (HZ) for monitoring the frequency of the three-phase four-wire alternating current busbar.
7. The new and clean energy marine power distribution four-wire system of claim 4, wherein: and the alternating current distribution board is also provided with a voltage selection switch (VS) for switching a double-pointer voltmeter (DV) to monitor the secondary coil of the isolation transformer and each phase voltage of the three-phase four-wire alternating current busbar.
8. The new and clean energy marine power distribution four-wire system of claim 5, wherein: and the alternating current distribution board is also provided with a current selection switch (AS) for switching an ammeter (A) to monitor the current between the phases of the three-phase four-wire alternating current busbar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022257368.XU CN214506553U (en) | 2020-10-12 | 2020-10-12 | New forms of energy and clean energy boats and ships distribution four-wire system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022257368.XU CN214506553U (en) | 2020-10-12 | 2020-10-12 | New forms of energy and clean energy boats and ships distribution four-wire system |
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| Publication Number | Publication Date |
|---|---|
| CN214506553U true CN214506553U (en) | 2021-10-26 |
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| CN202022257368.XU Active CN214506553U (en) | 2020-10-12 | 2020-10-12 | New forms of energy and clean energy boats and ships distribution four-wire system |
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| CN (1) | CN214506553U (en) |
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