CN210327142U - Multi-energy ship AC/DC hybrid power supply device - Google Patents
Multi-energy ship AC/DC hybrid power supply device Download PDFInfo
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- CN210327142U CN210327142U CN201921469130.4U CN201921469130U CN210327142U CN 210327142 U CN210327142 U CN 210327142U CN 201921469130 U CN201921469130 U CN 201921469130U CN 210327142 U CN210327142 U CN 210327142U
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Abstract
The utility model discloses a multi-energy boats and ships alternating current-direct current hybrid power supply unit, a serial communication port, include: the power supply unit comprises a power supply group module, a circuit switching module, a front power supply conversion module, a bus, a rear power supply conversion module and a load; the circuit switching module is used for switching the power supply circuit; the preposed power supply conversion module is used for inverting the power supply provided by the power supply group module and then inputting the inverted power supply to the bus; the rear power supply conversion module acquires power from the bus, inverts the power and supplies the power to a load; the power supply group module is connected with the line switching module, the line switching module is respectively connected with the front power supply conversion module and the load, the front power supply conversion module is connected with the bus, the bus is connected with the rear power supply conversion module, and the rear power supply conversion module is connected with the load. The utility model discloses when the direct current bus of boats and ships breaks down, overhauls or circuit unit such as rectification contravariant breaks down, can switch the AC power supply mode according to the condition, improves the stability of boats and ships operation.
Description
Technical Field
The utility model relates to a boats and ships power technology field, concretely relates to multi-energy boats and ships alternating current-direct current hybrid power supply unit.
Background
In engineering ships and some special ships, a propulsion system generally adopts a diesel engine as a prime mover, the diesel engine directly drives a ship propeller to push the ship to run, and the propulsion system consists of the diesel engine, a speed reducer and the propeller. With the development of the technology, a direct-current networking electric propulsion system appears, each diesel engine on a ship drives an asynchronous generator to generate electricity, each asynchronous generator is connected with a respective rectifier, rectified direct current is connected to a common direct-current bus, and the common direct-current bus is connected to a propulsion motor of the ship or various loads through inversion. When the load of the ship changes, the power generation power of the diesel generator can be adjusted according to the change of the load, the oil consumption of the ship is reduced, and the environmental protection performance of the ship is enhanced. However, since the main energy supply of the ship is concentrated on the common dc bus after rectification or chopping, although there are many advantages in dc networking power supply, once the common dc bus fails, is overhauled, or circuit units such as rectification and inversion of the ship fail, the ship in this time needs to stop various working conditions of the ship to deal with various failure problems on the ship due to loss of the energy supply source, and the running stability of the ship is low.
Disclosure of Invention
The utility model provides a multipotency source boats and ships alternating current-direct current hybrid power supply unit to solve among the prior art direct current propulsion system when circuit units such as the rectification contravariant that direct current bus breaks down, overhauls or be boats and ships break down, can't continue the problem of operation.
The utility model provides a multi-energy boats and ships alternating current-direct current hybrid power supply unit, include: the power supply unit comprises a power supply group module, a circuit switching module, a front power supply conversion module, a bus, a rear power supply conversion module and a load;
the circuit switching module is used for switching a power supply circuit;
the preposed power supply conversion module is used for inverting the power supply provided by the power supply set module and then inputting the inverted power supply to the bus;
the rear power supply conversion module acquires power from the bus, inverts the power and supplies the power to a load;
the power supply group module is connected with the line switching module, the line switching module is respectively connected with the front power supply conversion module and the load, the front power supply conversion module is connected with the bus, the bus is connected with the rear power supply conversion module, and the rear power supply conversion module is connected with the load.
Further, the device also comprises a control module; the control module is used for generating a switching signal;
the circuit switching module is connected with the control module and switches a power supply circuit based on a switching signal of the control module.
Further, the system also comprises a state acquisition module; the state acquisition module is respectively connected with the preposed power supply conversion module and the control module and is used for acquiring the working state of the preposed power supply conversion module; and the control module generates a corresponding switching signal based on the working state of the preposed power supply conversion module acquired by the state acquisition module.
Further, the system also comprises an electric quantity acquisition module; the electric quantity acquisition module is respectively connected with the power supply group module and the control module and is used for acquiring the residual electric quantity of the power supply group module; the control module generates corresponding switching signals based on the working state of the preposed power supply conversion module acquired by the state acquisition module and the residual electric quantity of the power supply group module acquired by the electric quantity acquisition module.
Further, the power pack module includes: the system comprises a diesel generator set, a photovoltaic cell and an energy storage element; the line switching module includes: a normally closed contact SB1, a normally open contact SB2, a normally closed contact SB3 and a normally open contact SB 4; the front power conversion module comprises: the system comprises an AC-AC frequency converter, an AC-DC rectifier, a first DC-DC converter, a second DC-DC converter, a first DC-AC inverter and a second DC-AC inverter; the diesel generator set is connected with one end of the normally closed contact SB1 and one end of a normally open contact SB2, respectively, the other end of the normally closed contact SB1 is connected with the input end of the AC-DC rectifier, the other end of the normally open contact SB2 is connected with the input end of the AC-AC inverter, the photovoltaic cell is connected with one end of the normally closed contact SB3 and one end of a normally open contact SB4, respectively, the energy storage element is connected with one end of the normally closed contact SB3 and one end of the normally open contact SB4, the other end of the normally closed contact SB3 is connected with the first DC-DC converter input end and the second DC-DC converter input end, respectively, the other end of the normally open contact SB4 is connected with the first DC-AC inverter input end and the second DC-AC inverter input end, respectively, and the output end of the AC-AC inverter is connected with the load, the output end of the AC-DC rectifier is connected with the bus, the output end of the first DC-DC converter is connected with the bus, the output end of the second DC-DC converter is connected with the bus, the output end of the first DC-AC inverter is connected with the load, and the output end of the second DC-AC inverter is connected with the load.
Further, the normally closed contact SB1 and the normally open contact SB2 are mechanically interlocked; the normally closed contact SB3 and the normally open contact SB4 are mechanically interlocked.
The utility model has the advantages that:
the utility model discloses a multi-energy boats and ships alternating current-direct current hybrid power supply device, the equipment of whole system is small in quantity, and the cost is lower. Meanwhile, when a direct current bus of the ship breaks down and overhauls or circuit units of rectification inversion and the like of the ship break down, the alternating current power supply mode can be switched according to the situation, the ship has the advantages that the existing single power supply mode is difficult to achieve, and the running stability of the ship is obviously improved. Mechanical interlocking exists between the alternating current power supply mode and the direct current power supply mode of the ship, when any power supply mode has a fault problem, the control module only needs to open the corresponding power supply contact, and then the opposite contact is closed, so that the ship can be operated in the environment without power in a fault power supply network, and the safety is obviously improved. According to the actual working state of the current converter, the power supply mode is automatically switched, the corresponding speed is improved, and the running stability of the ship is obviously improved.
Drawings
The features and advantages of the invention will be more clearly understood by reference to the accompanying drawings, which are schematic and should not be understood as imposing any limitation on the invention, in which:
fig. 1 is a schematic structural diagram of the present invention;
fig. 2 is a schematic view of the information acquisition and control structure of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.
The embodiment of the utility model provides a multipotency source boats and ships alternating current-direct current hybrid power supply unit, as shown in fig. 1, power supply package module includes: the system comprises a diesel generator set, a photovoltaic cell and an energy storage element; the line switching module includes: a normally closed contact SB1, a normally open contact SB2, a normally closed contact SB3 and a normally open contact SB 4; the front power conversion module comprises: the system comprises an AC-AC frequency converter, an AC-DC rectifier, a first DC-DC converter, a second DC-DC converter, a first DC-AC inverter and a second DC-AC inverter; the rear power conversion module comprises: a first post-DC converter, a second post-DC converter; the load includes: a propulsion motor, a primary load, a secondary load and a tertiary load; the diesel generator set is respectively connected with one end of a normally closed contact SB1 and one end of a normally open contact SB2, the other end of a normally closed contact SB1 is connected with the input end of an AC-DC rectifier, the other end of a normally open contact SB2 is connected with the input end of an AC-AC frequency converter, a photovoltaic cell is respectively connected with one end of a normally closed contact SB3 and one end of a normally open contact SB4, an energy storage element is respectively connected with one end of a normally closed contact SB3 and one end of a normally open contact SB4, the other end of the normally closed contact SB3 is respectively connected with the input end of a first DC-DC converter and the input end of a second DC-DC converter, the other end of a normally open contact SB4 is respectively connected with the input ends of the first DC-AC inverter and the second DC-AC inverter, the output end of the AC-AC frequency converter is connected with a propulsion motor, the output end of the AC-, the output end of the second DC-DC converter is connected with the bus, the output ends of the first DC-AC inverter and the second DC-AC inverter are respectively connected with the first-stage load, the second-stage load and the third-stage load, the bus is respectively connected with the input end of the first rear DC-DC converter and the input end of the second rear DC-DC converter, the output end of the first rear DC-DC converter is connected with the propulsion motor, and the output end of the second rear DC-DC converter is respectively connected with the first-stage load, the second-stage load and the third-stage load.
When no fault exists in a direct current networking of the ship and the ship normally runs, the normally closed contact SB1 is in a closed state, the normally open contact SB2 is in an open state, alternating current output by the diesel generator set is converted into direct current through the AC-DC rectifier and then input into the bus, the normally closed contact SB3 is in a closed state, the normally open contact SB4 is in an open state, direct current output by the photovoltaic cell and the energy storage element is rectified through the first DC-DC converter and the second DC-DC converter and then input into the bus, direct current in the bus is converted into alternating current through the first rear DC-AC inverter to supply power to the propulsion motor, and direct current in the bus is converted into alternating current through the second rear DC-AC inverter to supply power to the first-stage load, the second-stage load and the third-stage load respectively. When the power supply line of the diesel generating set breaks down or needs to be overhauled, the normally closed contact SB1 is disconnected, the normally open contact SB2 is closed, and at the moment, the alternating current output by the diesel generating set is rectified by the AC-AC frequency converter and then directly supplies power for the propulsion motor, so that the diesel generating set can still supply power for the propulsion motor when the line breaks down or needs to be overhauled, and the normal operation of the ship is ensured. When the power supply lines of the photovoltaic cell and the energy storage element are in fault or need to be overhauled, the normally closed contact SB3 is disconnected, the normally open contact SB4 is closed, and at the moment, direct current output by the energy storage element and the photovoltaic cell is converted by the first DC-AC inverter and the second DC-AC inverter and then directly supplies power to the first-stage load, the second-stage load and the third-stage load, so that normal power supply of a ship is guaranteed. The normally closed contact SB1 and the normally open contact SB2 are mechanically interlocked, the normally closed contact SB3 and the normally open contact SB4 are mechanically interlocked, even if the power is cut off, one contact can be changed, and the other contact interlocked with the one contact can be changed at the same time, so that the stability of the device is improved.
As shown in fig. 2, the hybrid ac/dc power supply device for a multi-energy ship further includes a control module, a state acquisition module, and an electric quantity acquisition module; the state acquisition module is respectively connected with the preposed power supply conversion module and the control module and is used for acquiring the working state of the preposed power supply conversion module; the control module is connected with the circuit switching module and generates corresponding switching signals based on the working state of the preposed power supply conversion module acquired by the state acquisition module and the residual electric quantity of the power supply group module acquired by the electric quantity acquisition module; the circuit switching module switches the power supply circuit based on the switching signal of the control module. Fig. 2 is a diagram added with an automatic switching function on the basis of the device shown in fig. 1, wherein a state acquisition module acquires working state signals of an AC-AC frequency converter, an AC-DC rectifier, a DC-DC converter and a DC-AC inverter, remotely transmits the acquired states to a control module through a communication module, and the control module controls corresponding contact states based on the working state signals so as to switch a power supply line.
The specific working mode is as follows:
when the diesel generating set breaks down:
at this time, no matter whether the AC-DC converter unit of the diesel generating set fails or not, the normally closed contact SB1 is opened, and the fault is repaired. When the residual capacity of an energy storage element of the ship is more than 20%, the ship still uses a direct-current power supply network for power supply, and meanwhile, when the allowance of the ship is less than 30%, a secondary load is cut off, and the normal operation of an important load is ensured; when the residual capacity of the energy storage element is less than 20%, directly closing the switch of the energy storage element;
when the diesel generator set has no fault and the AC-DC converter of the diesel generator has fault:
when the power generation allowance of the diesel generator is larger than 30%, whether the power supply network is switched is selected according to the residual capacity condition of the energy storage element: when the residual electric quantity of the energy storage element is more than 20%, the diesel generator and the fault current converter are closed, and the ship uses the photovoltaic cell and the energy storage element to supply power to the direct current network of the ship; when the residual capacity of the energy storage element is less than 20%, the power supply network of the ship is directly switched, namely the normally closed contact SB is switched1Open, opposite normally open contacts SB2Closing the switch and switching the power supply mode;
when the power generation allowance of the diesel generator is less than 30%, whether to switch the power supply network is selected according to the residual capacity condition of the energy storage element: when the residual capacity of the energy storage element is more than 20%, a diesel generator and a fault converter are closed, the ship uses a photovoltaic cell and the energy storage element to supply power to a direct current network of the ship, and whether secondary load needs to be cut off is determined according to whether the allowance is more than 30% or not; when the residual capacity of the energy storage element is less than 20%, the power supply network of the ship is directly switched, namely the normally closed contact SB1 is disconnected, the opposite normally open contact SB2 is closed, the power supply mode is switched, and the energy storage element adjusts the output power according to the load capacity;
when the margin reserve of the ship is more than 3And when the residual capacity of the energy storage element is less than 20%, the energy storage element is charged under the condition that the photovoltaic cell and a DC-DC converter of the energy storage element have no fault. When a problem occurs in a DC-DC converter, a normally closed contact SB of the photovoltaic cell and the energy storage element is disconnected3The ship still uses the diesel generator set to supply power to the direct current network; and when the margin reserve is less than 30%, cutting off the secondary load of the ship and ensuring the margin reserve of the ship.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope defined by the appended claims.
Claims (6)
1. The utility model provides a multipotency source boats and ships alternating current-direct current hybrid power supply unit which characterized in that includes: the power supply unit comprises a power supply group module, a circuit switching module, a front power supply conversion module, a bus, a rear power supply conversion module and a load;
the circuit switching module is used for switching a power supply circuit;
the preposed power supply conversion module is used for inverting the power supply provided by the power supply set module and then inputting the inverted power supply to the bus;
the rear power supply conversion module acquires power from the bus, inverts the power and supplies the power to a load;
the power supply group module is connected with the line switching module, the line switching module is respectively connected with the front power supply conversion module and the load, the front power supply conversion module is connected with the bus, the bus is connected with the rear power supply conversion module, and the rear power supply conversion module is connected with the load.
2. The hybrid ac/dc power supply unit for the multi-energy-source ship according to claim 1, further comprising a control module; the control module is used for generating a switching signal;
the circuit switching module is connected with the control module and switches a power supply circuit based on a switching signal of the control module.
3. The hybrid ac/dc power supply device for the multi-energy-source ship according to claim 2, further comprising a state acquisition module; the state acquisition module is respectively connected with the preposed power supply conversion module and the control module and is used for acquiring the working state of the preposed power supply conversion module; and the control module generates a corresponding switching signal based on the working state of the preposed power supply conversion module acquired by the state acquisition module.
4. The hybrid ac/dc power supply device for the multi-energy-source ship according to claim 3, further comprising an electric quantity acquisition module; the electric quantity acquisition module is respectively connected with the power supply group module and the control module and is used for acquiring the residual electric quantity of the power supply group module; the control module generates corresponding switching signals based on the working state of the preposed power supply conversion module acquired by the state acquisition module and the residual electric quantity of the power supply group module acquired by the electric quantity acquisition module.
5. The hybrid ac/dc power supply unit for a multi-energy source ship according to any one of claims 1-4, wherein said power pack module comprises: the system comprises a diesel generator set, a photovoltaic cell and an energy storage element; the line switching module includes: a normally closed contact SB1, a normally open contact SB2, a normally closed contact SB3 and a normally open contact SB 4; the front power conversion module comprises: the system comprises an AC-AC frequency converter, an AC-DC rectifier, a first DC-DC converter, a second DC-DC converter, a first DC-AC inverter and a second DC-AC inverter; the diesel generator set is connected with one end of the normally closed contact SB1 and one end of a normally open contact SB2, respectively, the other end of the normally closed contact SB1 is connected with the input end of the AC-DC rectifier, the other end of the normally open contact SB2 is connected with the input end of the AC-AC inverter, the photovoltaic cell is connected with one end of the normally closed contact SB3 and one end of a normally open contact SB4, respectively, the energy storage element is connected with one end of the normally closed contact SB3 and one end of the normally open contact SB4, the other end of the normally closed contact SB3 is connected with the first DC-DC converter input end and the second DC-DC converter input end, respectively, the other end of the normally open contact SB4 is connected with the first DC-AC inverter input end and the second DC-AC inverter input end, respectively, and the output end of the AC-AC inverter is connected with the load, the output end of the AC-DC rectifier is connected with the bus, the output end of the first DC-DC converter is connected with the bus, the output end of the second DC-DC converter is connected with the bus, the output end of the first DC-AC inverter is connected with the load, and the output end of the second DC-AC inverter is connected with the load.
6. The hybrid AC/DC power supply unit for the multi-energy-source ship according to claim 5, wherein the normally closed contact SB1 and the normally open contact SB2 are mechanically interlocked; the normally closed contact SB3 and the normally open contact SB4 are mechanically interlocked.
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| CN201921469130.4U CN210327142U (en) | 2019-09-05 | 2019-09-05 | Multi-energy ship AC/DC hybrid power supply device |
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| CN201921469130.4U CN210327142U (en) | 2019-09-05 | 2019-09-05 | Multi-energy ship AC/DC hybrid power supply device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112803443A (en) * | 2020-12-31 | 2021-05-14 | 格力电器（武汉）有限公司 | Power supply system, power supply control method and energy storage air conditioning equipment |
| US20230322351A1 (en) * | 2020-09-14 | 2023-10-12 | Skf Marine Gmbh | Energy supply system for a watercraft |
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2019
- 2019-09-05 CN CN201921469130.4U patent/CN210327142U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20230322351A1 (en) * | 2020-09-14 | 2023-10-12 | Skf Marine Gmbh | Energy supply system for a watercraft |
| CN112803443A (en) * | 2020-12-31 | 2021-05-14 | 格力电器（武汉）有限公司 | Power supply system, power supply control method and energy storage air conditioning equipment |
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