CN212324102U

CN212324102U - Photovoltaic system, assembly manager and box structure for power line carrier communication

Info

Publication number: CN212324102U
Application number: CN202020562858.8U
Authority: CN
Inventors: 卓兴成; 张小杰; 祝水星
Original assignee: Hefei Sungrow New Energy Technology Co Ltd
Current assignee: Sungrow Renewables Development Co Ltd
Priority date: 2020-04-15
Filing date: 2020-04-15
Publication date: 2021-01-08
Anticipated expiration: 2030-04-15

Abstract

The utility model relates to a photovoltaic system, subassembly manager and power line carrier communication box structure, this power line carrier communication box structure includes the case main part, is formed with the threading passageway in the case main part, and the threading passageway has at least two openings and each opening sets up respectively on the arbitrary surface of case main part, and threading passageway circumference is sealed so that the inner space of threading passageway and the inner chamber of case main part are sealed and isolated; through above-mentioned box structure, can provide a new magnetic ring and arrange the scheme, when can matcing the dc-to-ac converter of many models of different, need not to reserve a plurality of MC4 terminals or waterproof terminal, also need not set up extra protective structure to magnetic ring and vice limit wiring, reduced the magnetic ring lectotype degree of difficulty, can effective control subassembly manager box volume to reach the purpose that reduces product cost and packaging cost.

Description

Photovoltaic system, assembly manager and box structure for power line carrier communication

Technical Field

The utility model relates to a photovoltaic power generation equipment technical field, in particular to box structure is used in photovoltaic system, subassembly manager and power line carrier communication.

Background

In a photovoltaic power generation system, a photovoltaic module converts received solar energy into electric energy, and then the electric energy is converted into a required electric energy form by an electric energy conversion device (such as an inverter). The photovoltaic system is only provided with information of photovoltaic strings, the state of each component cannot be known, whether the component exerts force or not and how many users exert force cannot know the condition completely, a fault component cannot be found timely and accurately, the generated energy is reduced, meanwhile, after alternating current is switched off, a direct current side switch of an inverter is turned off and the strings are pulled out in maintenance or emergency, the whole strings have high direct current voltage, and potential safety hazards exist all the time.

In order to solve the above problems, an assembly control box is usually installed at the assembly end, and the assembly is turned off and operation information is collected. The communication between the component control box and equipment such as a data acquisition device or a cloud end can be realized only by a transfer device, namely a component manager, which is required for uploading information acquired by the component control box and downloading an emergency shutdown instruction, the component manager and the component control box are communicated and interacted mainly by utilizing the conventional group string direct current cable for PLC communication, and information is generally coupled to the group string direct current cable through a magnetic ring in a carrier PLC communication system, so that the group string direct current cable needs to pass through the magnetic ring of the component manager.

At present, the magnetic ring of assembly manager arranges the scheme and mainly has two kinds, one kind is that the magnetic ring arranges the box of assembly manager in, the direct current cable passes through the terminal and inserts the box, it is sealed with MC4 terminal or waterproof terminal inlet wire on the box, to the dc-to-ac converter of different models, direct current inlet wire quantity is different, need reserve a plurality of MC4 terminals or waterproof terminal, assembly manager box volume needs corresponding increase, and is with high costs, in addition, direct current cable current voltage is great, increase the installation design degree of difficulty.

Therefore, how to provide a new magnetic ring arrangement scheme to avoid the disadvantages of the above schemes becomes an important technical problem to be solved urgently by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

A first object of the utility model is to provide a box structure for power line carrier communication to form a new magnetic ring and arrange the scheme, avoid above-mentioned magnetic ring to arrange the shortcoming of scheme, when making the dc-to-ac converter of the different models of many models can be matchd to the subassembly manager, avoid because reserve terminal or magnetic ring protective structure and the volume increase problem that leads to.

A second object of the present invention is to provide an assembly manager based on the above box structure for power line carrier communication and a photovoltaic system including the assembly manager.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a box structure for power line carrier communication, includes the case main part, be formed with the threading passageway in the case main part, the threading passageway has two at least openings and each the opening sets up respectively on arbitrary surface of case main part, threading passageway circumference is sealed so that the inner space of threading passageway with the inner chamber of case main part is sealed keeps apart.

Preferably, the box main body includes a case and a cover, at least one of the case and the cover being provided with a passage formation structure extending toward the other of the case and the cover, the passage formation structure being in sealing engagement with the other of the case and the cover to form the threading passage.

Preferably, the housing and the cover plate are respectively provided with the channel structures extending toward each other and fitted to each other at end portions, and a seal ring is provided between fitting surfaces of the two channel structures.

Preferably, the threading device further comprises a magnetic ring mounting structure for fixedly fixing the magnetic ring outside the threading channel.

Preferably, the magnetic ring mounting structure comprises a first clamping structure and a second clamping structure which are arranged on the outer wall of the threading channel, and the magnetic ring is clamped and fixed by the cooperation of the first clamping structure and the second clamping structure.

Preferably, the magnetic ring mounting structure comprises a mounting plate and a fastener, the mounting plate is sleeved on the threading channel, the fastener is used for fixing the mounting plate on the PCBA control plate, and the mounting plate is used for fixing the magnetic ring.

Preferably, the magnetic ring mounting structure further comprises a plurality of cushion blocks, and the cushion blocks are arranged on the surface of one side, away from the magnetic ring, of the mounting plate, so that a clearance is formed between the surface of one side, away from the magnetic ring, of the mounting plate and the PCBA control plate.

Preferably, a mounting member for mounting the box main body at a predetermined position is provided outside the box main body.

A component manager, comprising:

the power line carrier communication box structure as described in any one of the above;

and the magnetic ring is arranged in an inner cavity of the box body structure for the power line carrier communication and is sleeved in the threading channel.

A photovoltaic system comprising a component control box, an inverter and a component manager as described above, a photovoltaic component being connected to the component control box, a dc cable between the component control box and the inverter passing through a threading channel of the component manager.

According to the above technical solution, the utility model discloses a box structure for power line carrier communication is disclosed, this box structure for power line carrier communication includes the case main part, be formed with the threading passageway in the case main part, the threading passageway can be as an organic whole structure with the case main part, also can be the components of a whole that can function independently structure, the threading passageway has at least two openings and each opening sets up respectively on the arbitrary surface of case main part, namely each opening can all set up on the same surface of case main part, also can set up respectively on different surfaces, each opening of threading passageway can set up to the form of one advances one and goes out, one advances many plays, advances one or more and goes out, threading passageway circumference is sealed so that the inner space of threading passageway and the inner chamber of case main part are sealed and isolated; when the direct current cable is applied, a coupler magnetic ring of the assembly manager can be arranged in the box body and sleeved in the threading channel, and the direct current cable is used for connecting the photovoltaic string and the inverter and penetrates through the threading channel; therefore, through the box body structure, a novel magnetic ring arrangement scheme is provided, when the inverters of different models of multiple types can be matched, a plurality of MC4 terminals or waterproof terminals do not need to be reserved, an extra protection structure does not need to be arranged on the magnetic ring and secondary side wiring, the difficulty in magnetic ring type selection is reduced, the size of the box body of the component manager can be effectively controlled, and the purposes of reducing the product cost and the packaging cost are achieved.

The utility model also provides a subassembly manager and including the photovoltaic system of this subassembly manager based on above-mentioned box structure for power line carrier communication, because this subassembly manager has adopted as above the box structure for power line carrier communication, consequently subassembly manager and photovoltaic system have the beneficial effect of above-mentioned box structure for power line carrier communication concurrently, no longer describe here.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view of a box structure for power line carrier communication according to an embodiment of the present invention;

fig. 2 is a plan view of a case structure for power line carrier communication according to an embodiment of the present invention;

fig. 3 is a front view of a box structure for power line carrier communication according to an embodiment of the present invention;

fig. 4 is a cross-sectional view of an assembled case structure for power line carrier communication and a magnetic ring according to an embodiment of the present invention;

fig. 5 and fig. 6 are schematic diagrams illustrating an assembly process of a box structure and a magnetic ring for power line carrier communication according to an embodiment of the present invention;

fig. 7 is a schematic view of a magnetic ring assembly structure according to another embodiment of the present invention;

fig. 8 is a sectional view of a magnetic ring assembly structure according to another embodiment of the present invention;

fig. 9 and 10 are schematic views of installation positions of the box structure for power line carrier communication according to the embodiment of the present invention;

fig. 11 and fig. 12 are schematic installation diagrams of different application scenarios of the component manager disclosed in the embodiment of the present invention.

Wherein:

1 is a box main body; 101 is a cover plate; 102 is a shell; 103 is a channel forming structure; 104 is a reinforcing rib; 2 is a threading channel; 3 is a communication cable sealing waterproof terminal; 4 is a communication waterproof terminal; 5 is a data wireless transmission module port; 6 is a DC power supply MC4 terminal; 7 is an AC power supply direct plug terminal; 8 is a ground terminal; 9 is a waterproof vent valve; 10 is a magnetic ring; the PCBA control board is 11; 12 is a sealing ring; 13 is a direct current cable; 14 is a binding belt; 15 is a fastener; 16 is a mounting plate; 17 is a cushion block; and 18 is a mounting member.

Detailed Description

One of the cores of the utility model is to provide a box structure for power line carrier communication to form a new magnetic ring and arrange the scheme, avoid above-mentioned magnetic ring to arrange the shortcoming of scheme, when reaching the dc-to-ac converter that makes the subassembly manager can match the different models of many models, avoid owing to reserve terminal or magnetic ring protective structure and the purpose of the volume increase problem that leads to.

The utility model discloses a another core provides an assembly manager and including the photovoltaic system of this assembly manager based on above-mentioned box structure is used in power line carrier communication.

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 to 3, fig. 1 is a schematic view of a box structure for power line carrier communication according to an embodiment of the present invention, fig. 2 is a plan view of the box structure for power line carrier communication according to an embodiment of the present invention, and fig. 3 is a front view of the box structure for power line carrier communication according to an embodiment of the present invention.

The embodiment of the utility model discloses a box structure for power line carrier communication, which comprises a box main body 1, the box main body 1 is reserved with installation positions for installing components such as a communication cable sealing waterproof terminal 3, a data wireless transmission module port 5, a grounding terminal 8, etc., a fixed structure for fixing a PCBA control panel 11 is arranged in the box main body 1, a threading channel 2 is formed in the box main body 1, the threading channel 2 and the box main body 1 can be integrated or can be a split detachable connection structure, the threading channel 2 can be in a straight line structure or can be in an arc shape, a right angle turning shape, a curve shape, a three-way structure, etc., the threading channel 2 is provided with at least two openings, and each opening is respectively arranged on any surface of the box main body 1, namely, each opening can be arranged on the same surface of the box main body 1, or respectively arranged on different surfaces, each opening of the threading channel 2 can be arranged in a form of one inlet and one outlet, one inlet and more outlets, one inlet and one outlet or more inlets and more outlets, and the threading channel 2 is circumferentially closed so that the inner space of the threading channel 2 is sealed and isolated from the inner cavity of the box main body 1.

It can be seen that, compared with the prior art, when the box structure for power line carrier communication provided by the embodiment of the present invention is applied, the magnetic ring 10 of the component manager can be placed in the box body and sleeved on the threading channel 2, and the direct current cable 13 connecting the photovoltaic string and the inverter passes through the threading channel 2; therefore, through the box body structure, a novel magnetic ring arrangement scheme is provided, a plurality of types of inverters with different models can be matched, good compatibility is achieved, meanwhile, a plurality of MC4 terminals or waterproof terminals do not need to be reserved, an extra protection structure does not need to be arranged on the magnetic ring 10 and secondary side wiring, the difficulty in selecting the magnetic ring 10 is reduced, the size of the box body of the assembly manager can be effectively controlled, and therefore the purposes of reducing product cost and packaging cost are achieved.

Preferably, the edge of each opening of the threading channel 2 is formed with a chamfered structure to avoid cutting the dc cable 13.

In order to facilitate the installation, maintenance and replacement of the PCBA control board 11, the magnetic ring 10 and other components of the component manager, the box main body 1 preferably adopts a split structure, in the embodiment of the present invention, the box main body 1 includes a housing 102 and a cover plate 101, the housing 102 is detachably and hermetically connected with the cover plate 101, at least one of the housing 102 and the cover plate 101 is provided with a channel constituting structure 103 extending to the other of the housing 102 and the cover plate 101, and the channel constituting structure 103 is hermetically matched with the other of the housing 102 and the cover plate 101 to constitute the threading channel 2.

Specifically, as shown in fig. 4, the housing 102 and the cover plate 101 are provided with passage forming structures 103 extending toward each other and fitted to each other at end portions thereof, and the seal ring 12 is provided between fitting surfaces of the two passage forming structures 103.

Further, the case structure for power line carrier communication further includes a magnetic ring mounting structure for fixing the magnetic ring 10 fitted outside the threading passage 2, and the magnetic ring mounting structure may be provided at any one of the housing 102, the cover plate 101, and the passage forming structure 103.

In an embodiment of the present invention, as shown in fig. 5, the magnetic ring installation structure includes a first locking structure and a second locking structure disposed on the outer wall of the threading passage 2, the outer wall of the threading passage 2 refers to the circumferential wall of the threading passage 2 located in the inner cavity of the box body 1, the first locking structure and the second locking structure cooperate to hold and fix the magnetic ring 10, specifically, the first locking structure includes a plurality of ribs 104 disposed on the circumferential wall of the passage forming structure 103, when installing, the magnetic ring 10 is inserted into the passage forming structure 103, the ribs 104 are used to limit the position, then the other end of the magnetic ring 10 is fixed by silica gel, of course, the first locking structure may be a step surface formed on the circumferential wall of the passage forming structure 103, or the circumferential wall of the passage forming structure 103 is set to be a conical surface to limit the magnetic ring 10, the second locking structure is not limited to the above-mentioned gluing structure, and the magnetic ring 10 may be clamped and fixed by providing a nut or the like that is screwed to the channel forming structure 103.

Still alternatively, as shown in fig. 5 and fig. 6, a part of the component manager includes two PCBA control boards 11, and the two PCBA control boards 11 may be used as the first locking structure and the second locking structure, that is, the magnetic ring 10 is clamped and fixed by the two PCBA control boards 11, and further, in order to avoid the magnetic ring 10 occupying too much space on the PCBA control board 11, a spacer block may be disposed between the PCBA control board 11 and the magnetic ring 10, so as to form a clearance area between the magnetic ring 10 and the PCBA control board 11.

Preferably, in another embodiment, the magnetic ring 10 may be mounted to the PCBA control board 11, as shown in fig. 7 and 8, in which embodiment the magnetic ring mounting structure includes a mounting plate 16 and a fastener 15, the mounting plate 16 being sleeved on the threading channel 2, the fastener 15 being used to secure the mounting plate 16 to the PCBA control board 11 of the component manager, the mounting plate 16 being used to secure the magnetic ring 10, as shown in fig. 8, the magnetic ring 10 being secured to the mounting plate 16 by a tie 14.

Further optimizing the above technical solution, the magnetic ring mounting structure further includes a plurality of spacers 17, as shown in fig. 8, the plurality of spacers 17 are disposed on a side surface of the mounting plate 16 away from the magnetic ring 10 so as to form a clearance between the side surface of the mounting plate 16 away from the magnetic ring 10 and the PCBA control board 11, so that the PCBA board below the magnetic ring 10 can be disposed with some patch devices.

Referring to fig. 9 and 10, the box main body 1 is externally provided with a mounting member 18 for mounting the box main body 1 at a predetermined position, and the mounting member 18 includes at least one hanging lug which can be provided on any surface of the box main body 1.

Based on the above box structure for power line carrier communication, the utility model also provides a component manager, this component manager includes magnetic ring 10 and the box structure for power line carrier communication as described above, wherein, magnetic ring 10 sets up in the inner chamber of box main part 1 of box structure for power line carrier communication and overlaps and locates threading passageway 2, still be provided with on the box main part 1 and be used for communication cable sealing waterproof terminal 3 such as emergency stop, be used for with inverter communication waterproof terminal 4, data wireless transmission module port 5, direct current power supply MC4 terminal 6, alternating current power supply cut-through terminal 7, ground terminal 8 and waterproof ventilation valve 9, technicians in this field can adjust the kind and the quantity of above-mentioned terminal or port as required, do not limit here; since the component manager adopts the box structure for power line carrier communication of the above embodiment, please refer to the above embodiment for the beneficial effect of the component manager.

Further, the utility model also provides a photovoltaic system, this photovoltaic system includes subassembly control box, dc-to-ac converter and as above the subassembly manager, photovoltaic module and subassembly control box are connected, and direct current cable 13 between subassembly control box and the dc-to-ac converter passes through from the threading passageway of subassembly manager and receives the dc-to-ac converter side, as shown in fig. 11 and 12, realizes communicating with subassembly control box through the PLC communication mode, gathers subassembly information and issues and opens the turn-off command; the assembly manager is in data interaction with the inverter through the communication waterproof terminal 4; inverter data acquired by the component manager and related data monitored by the photovoltaic component are uploaded to the cloud end through a wireless transmission module connected with a data wireless transmission module port 5, and a client can check the related data through an APP (application) end or a WAP (wireless application protocol) end; meanwhile, the far-end emergency stop switch transmits an emergency stop signal to the assembly manager through the communication cable sealing waterproof terminal 3, and when an emergency (such as fire) occurs, the emergency stop switch can be knocked down at the far end to reduce the voltage of the photovoltaic assembly to a safe voltage.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The box body structure for the power line carrier communication is characterized by comprising a box body, wherein a threading channel is formed in the box body, the threading channel is provided with at least two openings, the openings are respectively arranged on any surface of the box body, and the circumferential direction of the threading channel is closed so that the inner space of the threading channel is sealed and isolated from the inner cavity of the box body.

2. The box structure for power line carrier communication according to claim 1, wherein the box main body includes a case and a cover, at least one of the case and the cover is provided with a passage formation structure extending toward the other of the case and the cover, and the passage formation structure is in sealing engagement with the other of the case and the cover to form the threading passage.

3. The casing structure for power line carrier communication according to claim 2, wherein the housing and the cover are provided with the passage structures extending toward each other and fitted to each other at end portions thereof, respectively, and a seal ring is provided between fitting surfaces of the two passage structures.

4. The box structure for power line carrier communication according to any one of claims 1 to 3, further comprising a magnetic ring mounting structure for fixing a magnetic ring fixed outside the threading passage.

5. The box structure for power line carrier communication as recited in claim 4, wherein the magnetic ring mounting structure comprises a first locking structure and a second locking structure disposed on the outer wall of the threading channel, and the first locking structure and the second locking structure cooperate to clamp and fix the magnetic ring.

6. The box structure for power line carrier communication as recited in claim 4, wherein the magnetic ring mounting structure comprises a mounting plate and a fastener, the mounting plate is sleeved on the threading channel, the fastener is used for fixing the mounting plate to the PCBA control plate, and the mounting plate is used for fixing the magnetic ring.

7. The box structure for power line carrier communication as recited in claim 6, wherein the magnetic ring mounting structure further comprises spacers, the spacers being disposed on a side surface of the mounting plate away from the magnetic ring to form a clearance between the side surface of the mounting plate away from the magnetic ring and the PCBA control board.

8. The casing structure for power line carrier communication according to any one of claims 1 to 3 and 5 to 7, wherein a mounting piece for mounting the casing body at a predetermined position is provided outside the casing body.

9. A component manager, comprising:

the case structure for power line carrier communication according to any one of claims 1 to 8;

10. A photovoltaic system comprising a component control box to which photovoltaic components are connected, an inverter, and the component manager of claim 9, wherein the dc cable between the component control box and the inverter passes through the stringing channel of the component manager.