CN220653188U - Switch control box of adaptive photovoltaic inverter - Google Patents
Switch control box of adaptive photovoltaic inverter Download PDFInfo
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- CN220653188U CN220653188U CN202322121311.0U CN202322121311U CN220653188U CN 220653188 U CN220653188 U CN 220653188U CN 202322121311 U CN202322121311 U CN 202322121311U CN 220653188 U CN220653188 U CN 220653188U
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- 230000003044 adaptive effect Effects 0.000 title abstract description 6
- 238000009434 installation Methods 0.000 claims abstract 4
- 238000010248 power generation Methods 0.000 abstract description 13
- 238000004146 energy storage Methods 0.000 description 13
- 230000001681 protective effect Effects 0.000 description 5
- 238000004873 anchoring Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
- 210000000352 storage cell Anatomy 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model discloses a switch control box for an adaptive photovoltaic inverter, which comprises a shell with an installation cavity and a switch control circuit arranged in the installation cavity, wherein the switch control circuit is provided with a first branch circuit comprising a shore power input port socket and an air switch and a second branch circuit comprising at least one load output port socket and leakage protection circuit breakers matched with the load output port socket in number, two ends of the air switch are respectively and electrically connected with the shore power input port socket and an adaptive alternating current input port of the photovoltaic inverter in corresponding polarity, and two ends of the leakage protection circuit breakers are respectively and electrically connected with the load output port socket and the alternating current output port of the photovoltaic inverter. The utility model has the characteristics of convenient operation and good safety aiming at the scene that the input power supply and the on-off high-power load line are required to be frequently switched in the ship photovoltaic power generation system.
Description
Technical Field
The utility model relates to the technical field of power distribution control, in particular to a switch control box for an adaptive photovoltaic inverter.
Background
The solar photovoltaic power generation and energy storage technology aims at the application scene of the ship, can meet the living power consumption requirements of air conditioners, heating, kitchen appliances and the like on the ship when the main engine is stopped during loading and unloading of the ship berthing wharf and berthing anchoring of the ship, replaces the power supply of a ship-mounted diesel engine generator, and achieves good energy-saving and emission-reduction effects. Because the use environment of the ship is greatly different from that of land, the area for arranging the solar photovoltaic panels is limited, the power generation efficiency is high in sunny weather, the power generation requirement is basically met, but the photovoltaic power generation capacity is small in severe weather conditions such as cloudy weather, rainy weather and snowy weather, and therefore, the photovoltaic power generation system is required to be switched with an available wharf shore electric pile or a shipboard diesel generator to constantly input power so as to meet the uninterrupted domestic power requirement; when the available input power supply is not available and the electric quantity of the energy storage battery is low, various high-power-consumption electrical equipment such as an air conditioner and a water heater can be disconnected, high-priority low-power load circuits such as illumination and a daily low-power socket are reserved to work, and after the available input power supply is connected, the high-power load electrical equipment is turned on one by one.
For safety reasons, the main equipment of the photovoltaic power generation system, such as energy storage cells, photovoltaic inverters, etc., is usually disposed in the nacelle below the deck. When the operation of switching the input power supply is executed, the corresponding power supply cables and the operation switches are required to be plugged in and pulled out of the upper engine room and the lower engine room frequently; when the energy storage electric quantity is too low due to no available external input power supply, all high-power-consumption electrical equipment switches need to be turned off one by one; the whole process is time-consuming and labor-consuming, and a spark arc is easy to generate at the moment of switching on and off of a cable plug and a switch operated in the engine room oil gas environment, so that hidden major potential safety hazards exist.
Disclosure of Invention
In view of the above, the utility model aims to provide a switch control box for adapting a photovoltaic inverter, so as to solve the problems of complex process and great potential safety hazard in an operation environment caused by the connection and disconnection of a cable when the power generation amount of a marine photovoltaic power generation system and the power amount of an energy storage battery are insufficient and the need of switching an input power supply or reducing an output load in the prior art.
In order to achieve the above object, the present utility model provides a switch control box adapted to a photovoltaic inverter, the switch control box includes a housing having a mounting cavity and a switch control circuit disposed in the mounting cavity, the switch control circuit has two mutually independent sub-circuits, wherein a first sub-circuit is connected to an ac input port of the photovoltaic inverter, and a second sub-circuit is connected to an ac output port of the photovoltaic inverter.
Further, the first sub-circuit comprises an air switch and a shore power input port socket, the input end of the air switch is electrically connected with the shore power input port socket of the first sub-circuit in a polarity corresponding to that of the shore power input port socket, and the output end of the air switch is electrically connected with the alternating current input port of the photovoltaic inverter in a polarity corresponding to that of the shore power input port socket of the first sub-circuit; the second sub-circuit comprises at least one AC load output port socket and leakage protection circuit breakers, the number of the leakage protection circuit breakers is matched with that of the AC load output port sockets, the input ends of the leakage protection circuit breakers are electrically connected with the corresponding polarities of the AC output ports of the photovoltaic inverter, and the output ends of the leakage protection circuit breakers are electrically connected with the corresponding polarities of the AC load output port sockets.
Further, the switch control circuit further comprises a ground bar, wherein the first end, the second end and the third end of the ground bar are electrically connected with the grounding point of the photovoltaic inverter, the grounding point of the shore power input port socket and the grounding point of the alternating current load output port socket through grounding wires respectively.
Further, an operation opening is formed in the housing at a position corresponding to the air switch and the leakage protection circuit breaker, a protection cover is arranged on the operation opening in a turnover manner, a first side of the protection cover is hinged to one side of the operation opening, and a second side, opposite to the first side, of the protection cover is connected with the other side of the operation opening in a buckling manner.
Further, the shell is provided with a mounting hole which is arranged corresponding to the shore power input port socket and the alternating current load output port socket, and the shell is also provided with a cable threading hole which is used for establishing electric connection between the switch control circuit and the corresponding port of the photovoltaic inverter.
Further, mounting brackets are further arranged on the outer shell and correspond to the upper side and the lower side of the outer shell, screw holes are formed in the mounting brackets, and the outer shell is detachably connected with the fixing surface through the mounting brackets.
According to the utility model, through the arrangement of the switch control box which is connected with the remote cable of the photovoltaic inverter and is arranged in the bulkhead of the area above the deck of the ship or the living area, two independent switch control sub-circuits are arranged in the switch control circuit in the switch control box, when the energy storage electric quantity is insufficient, an input power cable is inserted, an air switch is closed to connect the first sub-circuit, and the shore electric pile or the shipborne generator is utilized for power supply supplement; or the high-load electrical equipment lines with low priority in the second sub-circuit are simultaneously disconnected by disconnecting the leakage protection circuit breaker. Because the vision and ventilation conditions of the area above the deck and the living area are good, the switch control box is arranged in the area to perform frequent cable plugging and unplugging and on/off switch operation, the number of times of entering and exiting the engine room with poor environment can be reduced, and the potential safety hazard of operation of spark arc generated in the moment of cable plugging, unplugging or on/off under the oil-gas environment in the engine room can be effectively avoided.
Drawings
Fig. 1 is a schematic circuit control diagram of a switching control box of an adaptive photovoltaic inverter of the present utility model.
Fig. 2 is a schematic structural diagram of the switch control box.
The specification reference numerals are as follows:
switch control box 10, housing 11, operation port 11a, shore power input cable plug 11b, ac load output cable plug 11c, switch control circuit 12, air switch 121, earth leakage protection circuit breaker 122, air switch input 12c, air switch output 12d, earth leakage protection circuit breaker input 12e, earth leakage protection circuit breaker output 12f, mounting bracket 13, screw hole 13a, protective cover 14, shore power input port receptacle 15, load output port receptacle 16, photovoltaic inverter 20, inverter ac output port 20a, inverter ac input port 20b, and switch control cabinet bank 30.
Detailed Description
The following is a further detailed description of the embodiments:
examples
As shown in fig. 1 and 2, the photovoltaic inverter 20 adapted by the present utility model is used for converting direct current of the energy storage battery pack into alternating current, and is used by electric equipment on a ship through an inverter alternating current output port 20 a; the photovoltaic inverter 20 can also receive the energy supply of an external input power source through the inverter alternating current input port 20b, rectifies the energy into direct current to charge the energy storage battery, and further inverts the direct current into alternating current to be used by electrical equipment on the ship through the inverter alternating current output port 20 a. The switch control circuit 12 of the switch control box 10 provided by the utility model comprises two independent sub-circuits, wherein one end of a first sub-circuit is connected with the photovoltaic inverter 20 from an air switch output end 12d, and the other end of the first sub-circuit is connected with a shore power pile or a shipboard generator from a shore power input port socket 15 through a shore power input cable plug 11 b; the second sub-circuit has one end connected from the earth leakage protection circuit breaker input 12e to the photovoltaic inverter 20 and the other end connected from the load output port receptacle 16 to the ac load cable on the vessel through the ac load output cable plug 11 c.
In this embodiment, the second sub-circuit of the switch control circuit 12 is provided with two groups of load output port sockets 16 and leakage protection circuit breakers 122, the input of which is connected in parallel and the output of which is discrete, and the line led out from the ac load output port 20a of the photovoltaic inverter 20 is separated into two independent ac load circuits, and each ac load circuit is provided with a leakage protection circuit breaker 122 respectively, so as to provide independent control of two load circuits of electric equipment with different power utilization priorities. It will be appreciated that in other embodiments, ac load output port 20a via photovoltaic inverter 20 may also be separated into a greater number of individual ac load circuits depending on the needs of the application to satisfy control of a greater priority type of ac load circuit.
Inserting a shore power input cable plug 11b of an external power supply such as a shore power pile into a shore power input port socket 15, and operating an air switch 121 in a first sub-circuit to be in a closed state so as to switch the first sub-circuit to be in a conducting state when the electric quantity of the energy storage battery pack is insufficient to realize that the external power supply such as the shore power pile supplies energy to the photovoltaic inverter 20; and when the photovoltaic power generation amount is enough or the power of the energy storage battery pack is enough, the air switch 121 is operated to be in an off state; by operating one of the earth leakage protection circuit breakers 122 of the second sub-circuit in an open state, it is achieved that the high load consumers connected to this ac load circuit are simultaneously switched off when the energy storage battery is under-charged.
In this embodiment, the switch control box 10 is installed in an area above the deck of a well ventilated ship or in a living area, and is used for adapting to a photovoltaic inverter in a turbine cabin which is usually arranged below the deck, and cable plugging, unplugging, switching on and off operations performed by entering and exiting the turbine cabin through the upper deck and the lower deck are not required, so that potential safety hazards caused by operations in an oil-gas environment are effectively avoided.
The switch control box 10 comprises a shell 11 with a mounting cavity and a switch control circuit 12 arranged in the mounting cavity, wherein the shell 11 is used for protecting the internal switch control circuit 12; preferably, the housing 11 is detachably mounted on the wall surface of the upper deck area or the wall surface of the living area of the ship through a mounting bracket 13, so as to timely shift the position of the switch control box 10 when the shore electric pile or the load line is changed. Specifically, the mounting brackets 13 are respectively disposed on the upper and lower sides of the housing 11, and screw holes 13a are disposed on the mounting brackets 13, and the housing 11 can be detachably disposed on a wall surface of a proper position on the deck through the cooperation of the screw holes 13a and bolts on the mounting brackets 13, so as to facilitate the quick assembly and disassembly of the whole switch control box 10.
Preferably, the switch control circuit 12 further includes a ground bank 30 for connecting the switch control box 10 to a ground; specifically, the first end, the second end and the third end of the ground bar 30 are electrically connected to the grounding point of the photovoltaic inverter 20, the grounding point of the shore power input port socket 15 and the grounding point of the load output port socket 16 through grounding wires, respectively.
An operation port 11a is provided on the housing 11 at a position corresponding to the switch control circuit 12 to expose the air switch 121 and the earth leakage protection circuit breaker 122 of the switch control circuit 12 when operated. The operation opening 11a is provided with a protective cover 14 for shielding and protecting the air switch 121 and the leakage protection circuit breaker 122 of the exposed part of the switch control circuit 12; specifically, the first side of the protective cover 14 is hinged to one side of the operation opening 11a, and the second side of the protective cover 14 opposite to the first side is connected to the other side of the operation opening 11a in a snap-fit manner, so that the protective cover 14 can be turned up during use, and the operation of personnel is facilitated.
The surface of the shell 11 is also provided with a shore power input port socket 15 and a load output port socket 16, wherein the shore power input port socket 15 is electrically connected with the air switch input end 12c in a polarity corresponding to that, and provides connection of a shore power input cable plug 11 b; the number of the load output port sockets 16 is set corresponding to the number of the leakage protection circuit breakers 122, and the load output port sockets 16 are electrically connected with the corresponding polarity of the leakage protection circuit breaker output terminals 12f and provide connection of the ac load output cable plugs 11 c.
When the utility model is used, the whole switch control box 10 is fixedly arranged on a deck of a ship or a wall surface in a living area through the cooperation of bolts and screw holes 13a on the mounting bracket 13. In a normal state where the photovoltaic power generation amount and the electric quantity of the energy storage battery of the ship are sufficient, the air switch 121 is in an open state, and the leakage protector 122 is in a closed state; when the photovoltaic power generation amount is insufficient due to continuous bad weather and the power amount of the energy storage battery is too low, if a shore power pile or a ship-borne generator is available, the shore power input cable plug 11b is preferably plugged into the shore power input port socket 15, and then the air switch 121 is closed to finish external power supply; when the ship is in a state of lacking an external power supply condition for offshore anchoring, the corresponding leakage protection circuit breaker 122 of the circuit where the low-priority high-power equipment is located can be temporarily disconnected so as to keep low-power consumption circuits such as lighting, daily sockets and the like necessary for life. The photovoltaic power generation system is applied to ships aiming at the unstable energy source which is influenced by weather and needs to be frequently switched to input the environment of an external power supply, is convenient and quick to operate, has high safety performance and has strong practicability.
Claims (4)
1. The switch control box is characterized by comprising a shell with an installation cavity and a switch control circuit arranged in the installation cavity, wherein the switch control circuit is provided with two mutually independent sub-circuits, a first sub-circuit is connected with an alternating current input port of the photovoltaic inverter, and a second sub-circuit is connected with an alternating current output port of the photovoltaic inverter; the first sub-circuit comprises an air switch and a shore power input port socket, wherein the input end of the air switch is electrically connected with the shore power input port socket in a polarity corresponding to that of the shore power input port socket, and the output end of the air switch is electrically connected with the alternating current input port of the photovoltaic inverter in a polarity corresponding to that of the shore power input port socket; the second sub-circuit comprises at least one AC load output port socket and leakage protection circuit breakers, the number of the leakage protection circuit breakers is matched with that of the AC load output port sockets, the input ends of the leakage protection circuit breakers are electrically connected with the corresponding polarities of the AC output ports of the photovoltaic inverter, and the output ends of the leakage protection circuit breakers are electrically connected with the corresponding polarities of the AC load output port sockets.
2. The switch control box of claim 1, wherein the switch control circuit comprises a ground bar, the first, second and third ends of the ground bar being electrically connected to the ground point of the photovoltaic inverter, the ground point of the shore power input port receptacle and the ground point of the ac load output port receptacle, respectively, by ground wires.
3. The switch control box for adapting a photovoltaic inverter according to any one of claims 1 to 2, wherein an operation port is formed on the housing at a position corresponding to the air switch and the earth leakage protection circuit breaker, a protection cover is provided on the operation port in a flip-flop manner, a first side of the protection cover is hinged to one side of the operation port, and a second side of the protection cover opposite to the first side is snap-connected to the other side of the operation port.
4. The switch control box for adapting a photovoltaic inverter according to any one of claims 1 to 2, wherein a mounting hole is formed in the housing, the mounting hole being provided corresponding to the shore power input port socket and the ac load output port socket, and a cable threading hole is formed in the housing, the cable threading hole establishing an electrical connection between the switch control circuit and the corresponding port of the photovoltaic inverter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322121311.0U CN220653188U (en) | 2023-08-07 | 2023-08-07 | Switch control box of adaptive photovoltaic inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322121311.0U CN220653188U (en) | 2023-08-07 | 2023-08-07 | Switch control box of adaptive photovoltaic inverter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220653188U true CN220653188U (en) | 2024-03-22 |
Family
ID=90290359
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322121311.0U Active CN220653188U (en) | 2023-08-07 | 2023-08-07 | Switch control box of adaptive photovoltaic inverter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220653188U (en) |
-
2023
- 2023-08-07 CN CN202322121311.0U patent/CN220653188U/en active Active
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