CN220382983U - Medium-high voltage photovoltaic bracket assembly and photovoltaic power generation system - Google Patents

Medium-high voltage photovoltaic bracket assembly and photovoltaic power generation system Download PDF

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Publication number
CN220382983U
CN220382983U CN202321666643.0U CN202321666643U CN220382983U CN 220382983 U CN220382983 U CN 220382983U CN 202321666643 U CN202321666643 U CN 202321666643U CN 220382983 U CN220382983 U CN 220382983U
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China
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bracket
photovoltaic
high voltage
medium
shielding layer
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CN202321666643.0U
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姜萍
杨善文
时晓蕾
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Hefei Zero Carbon Technology Co ltd
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Hefei Zero Carbon Technology Co ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy

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Abstract

The utility model discloses a medium-high voltage photovoltaic bracket component and a photovoltaic power generation system, wherein the medium-high voltage photovoltaic bracket component comprises: at least one upper support, at least one lower support, and a shielding layer; wherein the upper bracket is used for installing a photovoltaic module; the upper bracket and the lower bracket are sequentially distributed along the vertical direction and are fixedly connected; the shielding layer is arranged between the upper bracket and the lower bracket, the projection of the shielding layer in the vertical direction is used for covering the projection of the photovoltaic module in the vertical direction, and the shielding layer is used for shielding an electric field generated by the photovoltaic module; the lower support is used for realizing medium-high voltage insulation to the ground. The medium-high voltage photovoltaic bracket assembly can allow the photovoltaic module to be connected in series to a higher voltage level, boosting is not needed through two-stage conversion of the grid-connected inverter and the transformer, and the efficiency of the photovoltaic power generation system is improved; the volume and weight of the whole photovoltaic power generation system are also reduced.

Description

Medium-high voltage photovoltaic bracket assembly and photovoltaic power generation system
Technical Field
The utility model relates to the technical field of photovoltaic power generation, in particular to a medium-high voltage photovoltaic bracket assembly and a photovoltaic power generation system.
Background
In a photovoltaic power generation system, a low-voltage photovoltaic module is connected in series and then connected with a grid-connected inverter, the grid-connected inverter outputs hundreds of volts of alternating voltage, and then the alternating voltage is boosted by a transformer and is integrated into a medium-high voltage power grid of 10kV, 35kV and 110kV grades.
In the photovoltaic power generation system, the efficiency of the photovoltaic power generation system is low and the efficiency is difficult to improve due to two-stage conversion of the grid-connected inverter and the transformer.
In addition, the use of transformers results in a large and heavy overall photovoltaic power generation system.
In summary, how to improve the efficiency of the photovoltaic power generation system is a problem to be solved by those skilled in the art.
Disclosure of Invention
In view of the above, the present utility model aims to provide a medium-high voltage photovoltaic bracket assembly, which can connect photovoltaic modules in series to a higher voltage level, for example, a medium-high voltage level, without boosting through two-stage conversion of a grid-connected inverter and a transformer, so as to improve the efficiency of a photovoltaic power generation system. Another object of the present utility model is to provide a photovoltaic power generation system comprising the above photovoltaic bracket assembly.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
a medium and high voltage photovoltaic bracket assembly comprising: at least one upper support, at least one lower support, and a shielding layer;
wherein the upper bracket is used for installing a photovoltaic module;
the upper support and the lower support are sequentially distributed and fixedly connected in the vertical direction;
the shielding layer is arranged between the upper bracket and the lower bracket, the projection of the shielding layer in the vertical direction is used for covering the projection of the photovoltaic module in the vertical direction, and the shielding layer is used for shielding an electric field generated by the photovoltaic module;
the lower support is used for realizing medium-high voltage insulation to the ground.
Optionally, the photovoltaic module comprises at least two photovoltaic sub-modules connected in series in sequence;
the shielding layer comprises a conductive layer, the conductive layer is formed by a conductive piece, the projection of the conductive layer in the vertical direction is used for covering the projection of the photovoltaic module in the vertical direction, and the conductive layer is used for being connected with one photovoltaic sub-module in an equipotential manner;
or, the shielding layer comprises a semiconductive layer, the semiconductive layer is formed by a semiconductive member, the projection of the semiconductive layer in the vertical direction is used for covering the projection of the photovoltaic module in the vertical direction, and the semiconductive layer is used for being connected with one photovoltaic sub-module in an equipotential manner.
Optionally, the shielding layer comprises a film layer and/or an interwoven mesh layer.
Optionally, the shielding layer is an integral layer.
Optionally, the shielding layer includes at least two shielding sublayers, heights of any two shielding sublayers are unequal, and projections of two adjacent shielding sublayers in the vertical direction have overlapping portions.
Optionally, the shielding layer is perpendicular to the vertical direction, or an included angle is formed between the shielding layer and the vertical direction.
Optionally, the upper bracket, the shielding layer and the lower bracket are fixedly connected by a fastener.
Optionally, the upper bracket and the shielding layer are both provided with threaded through holes in threaded fit with the fasteners, and the lower bracket is provided with threaded blind holes in threaded fit with the fasteners.
Optionally, the number of the upper brackets and the number of the lower brackets are at least two, and the upper brackets and the lower brackets are in one-to-one correspondence;
the heights of any two upper brackets are not equal, or the heights of any two upper brackets are equal;
the heights of any two lower brackets are not equal, or the heights of any two lower brackets are equal.
Optionally, the lower bracket is a middle-high voltage insulating bracket;
or, the lower support includes a lower support section and a lower support section which are distributed in turn along the vertical direction and are fixedly connected, the lower support section is positioned at the top end of the lower support section, the upper support, the shielding layer and the lower support section are fixedly connected, and the lower support section or the lower support section is a medium-high voltage insulating part.
Optionally, the medium-high voltage photovoltaic bracket assembly further comprises an assembly connection bracket arranged on the upper bracket, and the assembly connection bracket is used for installing the photovoltaic module.
Optionally, at least two upper brackets correspond to one component connecting bracket, at least two upper brackets are distributed along the length direction of the component connecting bracket and/or at least two upper brackets are distributed along the width direction of the component connecting bracket in sequence, and the lower brackets correspond to the upper brackets one by one.
Optionally, the upper support and the component connecting support are in one-to-one correspondence, and the lower support and the upper support are in one-to-one correspondence.
Based on the medium-high voltage photovoltaic bracket assembly, the utility model also provides a photovoltaic power generation system, which comprises: a photovoltaic module and a medium-high voltage photovoltaic bracket assembly as claimed in any one of the preceding claims.
In the middle-high voltage photovoltaic bracket assembly provided by the utility model, the lower bracket is used for realizing middle-high voltage insulation to the ground, and the upper bracket is used for installing the photovoltaic module, so that the insulation of the photovoltaic module to the ground can be realized; the heights of the upper bracket and the lower bracket are adjusted to meet the safety distance required by the photovoltaic module; the shielding layer is arranged between the upper bracket and the lower bracket, the projection of the shielding layer in the vertical direction is used for covering the projection of the photovoltaic module in the vertical direction, and the shielding layer is used for shielding an electric field generated by the photovoltaic module. In this way, the medium-high voltage photovoltaic bracket assembly can allow the photovoltaic module to be connected in series to a higher voltage level, such as a medium-high voltage level, and boosting is not required through two-stage conversion of the grid-connected inverter and the transformer, so that the efficiency of the photovoltaic power generation system is improved.
Meanwhile, the medium-high voltage photovoltaic bracket assembly provided by the utility model can allow the photovoltaic modules to be connected in series to higher voltage levels, boosting is not needed through two-stage conversion of the grid-connected inverter and the transformer, and the volume and the weight of the whole photovoltaic power generation system are effectively reduced.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present utility model, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
Fig. 1 is an isometric view of a medium-high voltage photovoltaic bracket assembly provided by an embodiment of the present utility model;
fig. 2 is a schematic structural diagram of a medium-high voltage photovoltaic bracket assembly according to an embodiment of the present utility model;
fig. 3 is a schematic structural diagram of another medium-high voltage photovoltaic bracket assembly according to an embodiment of the present utility model;
fig. 4 is a schematic structural diagram of another medium-high voltage photovoltaic bracket assembly according to an embodiment of the present utility model;
fig. 5 is a schematic structural diagram of another medium-high voltage photovoltaic bracket assembly according to an embodiment of the present utility model;
fig. 6 is a cross-sectional view of a medium-high voltage photovoltaic bracket assembly provided by an embodiment of the present utility model;
FIG. 7 is an enlarged schematic view of the portion A of FIG. 6;
fig. 8 is a schematic structural diagram of another medium-high voltage photovoltaic bracket assembly according to an embodiment of the present utility model.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. The terminology used in the following examples is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used in the specification of the utility model and the appended claims, the singular forms "a," "an," "the," and "the" are intended to include, for example, "one or more" such forms of expression, unless the context clearly indicates to the contrary. It should also be understood that in embodiments of the present utility model, "one or more" means one, two, or more than two; "and/or", describes an association relationship of the association object, indicating that three relationships may exist; for example, a and/or B may represent: a alone, a and B together, and B alone, wherein A, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship.
Reference in the specification to "one embodiment" or "some embodiments" or the like means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the utility model. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," and the like in the specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments" unless expressly specified otherwise. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless expressly specified otherwise.
The plurality of the embodiments of the present utility model is greater than or equal to two. It should be noted that, in the description of the embodiments of the present utility model, the terms "first," "second," and the like are used for distinguishing between the descriptions and not necessarily for indicating or implying a relative importance, or alternatively, for indicating or implying a sequential order.
"parallel" and "perpendicular" as referred to in the embodiments of the present utility model are "substantially parallel" and "substantially perpendicular" in actual operation. "substantially parallel" may be understood as parallel with some error and similarly "substantially perpendicular" may be understood as perpendicular with some error.
The "plane" referred to in the embodiments of the present utility model is a "plane substantially parallel to a horizontal plane" in actual operation.
The "insulation" referred to in the embodiments of the present utility model is "electrical insulation" in actual operation.
The term "medium-high voltage" in the embodiment of the present utility model means that the voltage is not less than 10kv.
At present, the medium-high voltage photovoltaic power generation system can solve the problems that the photovoltaic power generation system is large and heavy in size, low in efficiency and difficult to improve. In medium-high voltage photovoltaic power generation systems, photovoltaic modules are required to be connected in series to medium-high voltage. Because the voltage of the photovoltaic module is higher, insulation between the photovoltaic module and the ground is required, and the safety distance required by the medium-high voltage photovoltaic module is larger; moreover, the electric field generated by the photovoltaic module is large, and shielding of the electric field generated by the photovoltaic module is required. Therefore, insulation between the photovoltaic module and the ground, a safe distance required by the middle-high voltage photovoltaic module and an electric field generated by shielding the photovoltaic module can be ensured, and the problems that the photovoltaic power generation system is large in size, heavy, low in efficiency and difficult to improve can be solved.
Based on the above, the embodiment of the utility model provides a medium-high voltage photovoltaic bracket assembly, which can realize insulation between a photovoltaic module and the ground, a safety distance required by the medium-high voltage photovoltaic module and shielding an electric field generated by the photovoltaic module, so that the photovoltaic module can be connected in series to a higher voltage level, such as a medium-high voltage level, and boosting is not required by two-stage conversion of a grid-connected inverter and a transformer, thereby effectively improving the efficiency of a photovoltaic power generation system and reducing the volume and weight of the photovoltaic power generation system.
As shown in fig. 1 and fig. 2, the medium-high voltage photovoltaic bracket assembly provided by the embodiment of the utility model includes: an upper support 3, a lower support 4, and a shielding layer 5.
The upper bracket 3 is used for mounting the photovoltaic module 1. For easy installation, the medium-high voltage photovoltaic bracket assembly comprises an assembly connecting bracket 2 arranged on an upper bracket 3, wherein the assembly connecting bracket 2 is used for installing a photovoltaic module. As for the specific structure of the component connection bracket 2, this embodiment is not limited as selected according to the actual situation.
In order to improve the stability of the module connecting bracket 2, on the one hand, as shown in fig. 2, 4, 5 and 6, the optional medium-high voltage photovoltaic bracket assembly further comprises a first reinforcement member 6 fixedly connecting the upper bracket 3 and the module connecting bracket 2, and a second reinforcement member 7 fixedly connecting the upper bracket 3 and the module connecting bracket 2, wherein the first reinforcement member 6 and the second reinforcement member 7 are respectively arranged at two sides of the upper bracket 3.
One end of the first reinforcement member 6 is fixedly connected with the upper bracket 3, the other end of the first reinforcement member 6 is fixedly connected with the component connecting bracket 2, one end of the second reinforcement member 7 is fixedly connected with the upper bracket 3, and the other end of the second reinforcement member 7 is fixedly connected with the component connecting bracket 2. The specific manner of fixing the connection may be selected according to practical situations, for example, by a threaded fastener or the like, which is not limited in this embodiment.
In order to improve the stability of the module connecting bracket 2, on the other hand, as shown in fig. 8, in order to support the stability of the module connecting bracket 2, the medium-high voltage photovoltaic bracket assembly may further include a support member 8 fixedly connecting the upper bracket 3 and the module connecting bracket 2. The support member 8 may be one or more than two, which is not limited in this embodiment.
In practical situations, other ways may be selected to improve the stability of the component connection bracket 2, which is not limited in this embodiment.
The specific connection structure of the photovoltaic module 1 and the component connection bracket 2, and the specific connection structure of the component connection bracket 2 and the upper bracket 3 are selected according to practical situations. For maintenance, the photovoltaic module 1 and the assembly connection bracket 2 may be selected to be detachably and fixedly connected, and the assembly connection bracket 2 and the upper bracket 3 may be detachably and fixedly connected. The module connecting bracket 2 and the upper bracket 3 are detachably and fixedly connected by bolts and nuts, for example. The specific manner of detachably and fixedly connecting is selected according to practical situations, and the embodiment is not limited thereto.
The upper bracket 3 and the lower bracket 4 are distributed in sequence along the vertical direction and are fixedly connected. The specific structure of the fixed connection between the upper bracket 3 and the lower bracket 4 is selected according to the actual situation, and this embodiment is not limited thereto.
The shielding layer 5 is disposed between the upper bracket 3 and the lower bracket 4, the projection of the shielding layer 5 in the vertical direction is used for covering the projection of the photovoltaic module 1 in the vertical direction, and the shielding layer 5 is used for shielding an electric field generated by the photovoltaic module 1. It should be noted that, this embodiment realizes uniformity of the ground potential of the shielding layer 5, that is, the potential of the entire shielding layer 5 is uniform, and each position in the entire shielding layer 5 is uniform with respect to the ground potential.
It should be noted that, the projection in the vertical direction, that is, the projection direction is the vertical direction, the projection line is parallel to the vertical direction, the projection of the shielding layer 5 in the vertical direction is located on the horizontal plane perpendicular to the vertical direction, and the projection of the photovoltaic module 1 in the vertical direction is located on the horizontal plane perpendicular to the vertical direction.
The lower support 4 serves to provide medium-high voltage insulation to ground, so that both the photovoltaic module 1 and the shielding layer 5 are insulated from ground.
In the middle-high voltage photovoltaic bracket assembly, the lower bracket 4 is used for realizing middle-high voltage insulation to the ground, and the upper bracket 3 is used for installing the photovoltaic module, so that the insulation of the photovoltaic module 1 to the ground can be realized; the heights of the upper bracket 3 and the lower bracket 4 are adjusted to meet the safety distance required by the photovoltaic module 1; the shielding layer 5 is disposed between the upper bracket 3 and the lower bracket 4, the projection of the shielding layer 5 in the vertical direction is used for covering the projection of the photovoltaic module 1 in the vertical direction, and the shielding layer 5 is used for shielding an electric field generated by the photovoltaic module 1. In this way, the medium-high voltage photovoltaic bracket assembly can allow the photovoltaic module 1 to be connected in series to a higher voltage level, such as a medium-high voltage level, and boosting is not required by two-stage conversion of a grid-connected inverter and a transformer, so that the efficiency of the photovoltaic power generation system is improved; the volume and the weight of the whole photovoltaic power generation system are effectively reduced.
Above-mentioned well high-pressure photovoltaic support subassembly, the structure is simpler, and the steadiness is better, also is convenient for maintain.
In the above-mentioned medium-high voltage photovoltaic bracket assembly, the shape of the upper bracket 3 and the lower bracket 4 is selected according to practical situations, for example, the upper bracket 3 and/or the lower bracket 4 is in a column shape, and the cross section of the column shape may be a circle, a square, or other shapes, which is not limited in this embodiment.
As shown in fig. 1, the number of the upper brackets 3 and the lower brackets 4 is two, and the upper brackets 3 and the lower brackets 4 are in one-to-one correspondence. As shown in fig. 3, the upper bracket 3 and the lower bracket 4 are each one. Of course, three or more upper brackets 3 and three or more lower brackets 4 may be selected.
In the case that the upper bracket 3 and the lower bracket 4 are more than two, the upper bracket 3 and the lower bracket 4 may be selected to correspond one to one, or at least two upper brackets 3 may be selected to correspond to one lower bracket 4, or at least two lower brackets 4 may be selected to correspond to one upper bracket 3, which is not limited according to the actual situation.
In the case that the upper brackets 3 are one, one upper bracket 3 corresponds to one component connecting bracket 2, that is, the upper brackets 3 correspond to the component connecting brackets 2 one by one.
In the case that the upper brackets 3 are more than two, at least two upper brackets 3 are used to correspond to one component connecting bracket 2, and at least two upper brackets 3 are distributed in sequence along the length direction of the component connecting bracket 2 and/or at least two upper brackets 3 are distributed along the width direction of the component connecting bracket 2. In this case, the corresponding relationship between the upper bracket 3 and the lower bracket 4 is referred to above, and will not be described here.
Of course, the upper bracket 3 and the component connecting bracket 2 can be alternatively in one-to-one correspondence. In this case, the corresponding relationship between the upper bracket 3 and the lower bracket 4 is referred to above, and will not be described here.
In the case where at least two upper brackets 3 are used to correspond to one component connecting bracket 2, the manner shown in fig. 2, 4, 5, 6 may be selected to increase the stability of the component connecting bracket 2; in the case that the upper bracket 3 corresponds to the component connecting bracket 2 one by one, the manner shown in fig. 3 may be selected to improve the stability of the component connecting bracket 2.
In order to reduce the cost, as the load bearing range allows, as shown in fig. 3, it is possible to select one upper bracket 3 to be in one-to-one correspondence with the component connecting brackets 2, or only one upper bracket to be in correspondence with one component connecting bracket 2 in the width direction or the length direction of the component connecting bracket 2. In this case, the support 8 may be provided to improve the stability of the assembly connection bracket 2, thereby indirectly reinforcing the photovoltaic module 1.
In the case that the upper bracket 3 and the lower bracket 4 are more than two and the upper bracket 3 and the lower bracket 4 are in one-to-one correspondence, the heights of any two upper brackets 3 can be equal or unequal, and the heights of any two lower brackets 4 can be equal or unequal.
As shown in fig. 2, the upper support 3 and the lower support 4 are two, the heights of the two upper supports 3 are not equal, and the heights of the two lower supports 4 are equal, in which case, the module connecting support 2 and the photovoltaic module 1 are both obliquely arranged.
As shown in fig. 4 and 5, the upper bracket 3 and the lower bracket 4 are two, the heights of the two upper brackets 3 are equal, and the heights of the two lower brackets 4 are unequal, in which case, the module connecting bracket 2 and the photovoltaic module 1 are obliquely arranged.
Of course, the number of the upper brackets 3 and the lower brackets 4 can be more than two, the heights of any two upper brackets 3 are not equal, and the heights of any two lower brackets 4 are not equal; the number of the upper brackets 3 and the lower brackets 4 can be more than two, the heights of any two upper brackets 3 are equal, and the heights of any two lower brackets 4 are equal.
In the medium-high voltage photovoltaic bracket assembly, the specific structure of the shielding layer 5 is selected according to actual conditions.
In the photovoltaic power generation system, the photovoltaic module 1 comprises at least two photovoltaic sub-modules which are sequentially connected in series. In some embodiments, to facilitate shielding of the shielding layer 5 from the electric field generated by the photovoltaic module 1, the shielding layer 5 may optionally comprise a conductive layer formed by conductive members, the projection of the conductive layer in the vertical direction being used to cover the projection of the photovoltaic module 1 in the vertical direction, and the conductive layer being used for equipotential connection with one photovoltaic sub-module.
It should be noted that equipotential connection is well known to those skilled in the art, and for example, the equipotential connection between the conductive layer and the photovoltaic sub-module may be implemented by a conductive wire.
The photovoltaic sub-module used for equipotential connection with the conductive layer may be the photovoltaic sub-module with the largest ground potential in the photovoltaic module 1, the photovoltaic sub-module with the smallest ground potential in the photovoltaic module 1, or the photovoltaic sub-module with the middle ground potential in the photovoltaic module 1.
The above-described conductive layer reduces the potential of the photovoltaic sub-module of high potential so that the entire photovoltaic module 1 can be connected in series to a higher potential, i.e. the entire photovoltaic module 1 can be connected in series to a higher voltage level.
It should be noted that the conductive layer shields the electric field generated by the photovoltaic module 1, that is, the shielding layer 5 shields the electric field generated by the photovoltaic module 1.
In other embodiments, the shielding layer 5 comprises a semiconductive layer formed by a semiconductive member, the projection of the semiconductive layer in the vertical direction being intended to cover the projection of the photovoltaic module 1 in the vertical direction, and the semiconductive layer being intended to be connected equipotential to one photovoltaic sub-module.
For a specific description of the equipotential connection and a specific location of the photovoltaic sub-module for equipotential connection with the semiconductive layer, reference may be made to the foregoing description, which is not repeated here.
The specific structure of the shielding layer 5 is selected according to the actual situation. In some embodiments, the shielding layer 5 comprises a thin film layer, for example, formed of a thin film formed of a conductive material, or a thin film formed of a semiconductive material.
In other embodiments, the shielding layer 5 comprises an interwoven mesh layer, for example, formed of a rope of a conductive material or formed of a rope of a semiconductive material.
In other embodiments, the shielding layer 5 comprises a film layer and an interlaced mesh layer. In this case, the film layer and the interlaced mesh layer may be selected to be stacked in the vertical direction, or the film layer and the interlaced mesh layer may be sequentially distributed in a plane where the shielding layer is located, or the film layer and the interlaced mesh layer may be distributed in other manners, which is not limited in this embodiment.
The number of shielding layers 5 is selected according to the actual situation. In some embodiments, as shown in fig. 1-3, 5, 6, 7, 8, the shielding layer is one integral layer, i.e. the shielding layer 5 is only one.
In other embodiments, as shown in fig. 4, the shielding layer 5 includes at least two shielding sub-layers 51, the heights of any two shielding sub-layers 51 are not equal, and projections of adjacent two shielding sub-layers 51 in the vertical direction have overlapping portions. In this way, it is ensured that the projection of all the shielding layers 5 in the vertical direction can cover the projection of the photovoltaic module 1 in the vertical direction.
The size of the overlapping portion is selected according to the actual situation, and this embodiment is not limited thereto.
As for the arrangement direction of the shielding layer 5, it can be selected according to actual conditions. In some embodiments, as shown in fig. 2-4, 6, and 7, the shielding layer 5 is perpendicular to the vertical direction, i.e., the shielding layer 5 is parallel to the horizontal direction.
In other embodiments, as shown in fig. 5, the shielding layer 5 has an angle with the vertical direction, and it is understood that the shielding layer 5 also has an angle with the horizontal direction. In this case, the shielding layer 5 may be disposed parallel to the photovoltaic module 1, or the shielding layer 5 may be inclined with respect to the photovoltaic module 1.
In the medium-high voltage photovoltaic bracket assembly, the shielding layer 5 is arranged between the upper bracket 3 and the lower bracket 4. In some embodiments, the shielding layer 5 is fixedly connected to the upper support 3 or the shielding layer 5 is fixedly connected to the lower support 4.
In other embodiments, both the upper support 3 and the lower support 4 are fixedly connected to the shielding layer 5. For simplicity of fixation, the upper support 3, the shielding layer 5 and the lower support 4 may be chosen to be fixedly connected with common fasteners. For ease of maintenance, the upper support 3, the shielding layer 5 and the lower support 4 may optionally be detachably and fixedly connected together with fasteners.
As shown in fig. 6 and 7, the upper bracket 3 is provided with a first threaded through hole 31 in threaded engagement with a fastener, the shielding layer 5 is provided with a second threaded through hole 52 in threaded engagement with a fastener, and the lower bracket 4 is provided with a threaded blind hole 43 in threaded engagement with a fastener. It will be appreciated that the first threaded through hole 31, the second threaded through hole 52, and the threaded blind hole 43 communicate sequentially to ensure that the fastener passes through the first threaded through hole 31, the second threaded through hole 52, and the threaded blind hole 43 sequentially. The first and second threaded through holes 31 and 52, respectively, may be referred to as threaded through holes.
For ease of installation, the upper bracket 3 may alternatively be provided with a first mounting flange on which the first threaded through hole 31 is provided, and the lower bracket 4 with a second mounting flange on which the threaded blind hole 43 is provided. In this way, the reliability of the fixed shield layer 5 is also improved.
The fastening piece can be a screw or a bolt, and is selected according to practical situations.
In practical cases, the upper bracket 3, the shielding layer 5 and the lower bracket 4 may be fixedly connected by other structures through a common fastener, and are not limited to the structures shown in fig. 6 and 7.
In practice, the shielding layer 5 may alternatively be disposed between the upper bracket 3 and the lower bracket 4 by other means, and is not limited to the above description.
In the medium-high voltage photovoltaic bracket assembly, the lower bracket 4 is used for realizing medium-high voltage insulation to the ground. In one aspect, as shown in fig. 1-6, the lower support 4 may alternatively be a medium-high voltage insulating support, i.e., the entire lower support 4 may have medium-high voltage insulating properties. In this way, it is achieved that both the upper support 3 and the shielding layer 5 are connected insulated from the lower support 4.
On the other hand, only part of the lower bracket 4 may be selected to have medium-high voltage insulation. As shown in fig. 8, the lower support 4 includes a first lower support section 41 and a second lower support section 42 which are sequentially distributed and fixedly connected in the vertical direction, the second lower support section 42 is located at the top end of the first lower support section 41, the upper support 3, the shielding layer 5 and the second lower support section are fixedly connected, and the first lower support section 41 or the second lower support section 42 is a medium-high voltage insulating member. In this way, the insulating connection of the shielding layer 5 and the medium-high voltage insulator is also achieved, and the upper bracket 3 and the medium-high voltage insulator are also connected in an insulating manner.
In practical situations, the lower bracket second section 42 may be selected to be a medium-high voltage insulator for ease of popularization and use. In some embodiments, a photovoltaic rack of an existing photovoltaic power generation system includes: the photovoltaic module comprises a first bracket, a second bracket and a component connecting bracket 2, wherein the first bracket and the second bracket are sequentially distributed along the numerical direction and are fixedly connected, the component connecting bracket 2 is fixed on the first bracket through a locking piece 9, and the component connecting bracket 2 is used for installing the photovoltaic module 1. The height formed by the first bracket and the second bracket is lower, and the distance between the middle and high voltage photovoltaic module and the ground can not be met. In order to make the existing photovoltaic power generation system rise into the medium-high voltage range by utilizing the existing photovoltaic support, the lower support second section 42 and the shielding layer 5 can be directly added in the existing photovoltaic support, namely the shielding layer 5 and the lower support second section 42 are added between the first support and the second support, and the conducting layer or the semi-conducting layer of the shielding layer 5 is connected with one photovoltaic sub-module in the photovoltaic module 1 in an equipotential manner. In this case, the first bracket is the upper bracket 3 and the second bracket is the lower bracket 41. In this way, the distance from the photovoltaic module 1 to the ground is increased, the insulation of the photovoltaic module 1 to the ground is realized, and the electric field generated by the photovoltaic module 1 is shielded, so that the popularization and the application of the medium-high voltage bracket assembly provided by the embodiment of the utility model are facilitated.
The medium-high voltage insulator may be a medium-high voltage insulator or other components capable of realizing medium-high voltage insulation, which is not limited in this embodiment. Accordingly, the materials of the medium-high voltage insulating support and the medium-high voltage insulating member are not limited in this embodiment.
Based on the medium-high voltage photovoltaic bracket assembly provided by the embodiment, the embodiment of the utility model also provides a photovoltaic power generation system, which comprises: the photovoltaic module and the medium-high voltage photovoltaic bracket assembly are described in the embodiment. It is understood that the photovoltaic power generation system may be a medium-high voltage photovoltaic power generation system.
Because the middle-high voltage photovoltaic bracket assembly provided by the embodiment has the technical effects, the photovoltaic power generation system comprises the middle-high voltage photovoltaic bracket assembly, and the photovoltaic power generation system also has corresponding technical effects, and the description is omitted herein.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. 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 utility model. Thus, the present utility model 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 (14)

1. A medium-high voltage photovoltaic bracket assembly, comprising: at least one upper support, at least one lower support, and a shielding layer;
wherein the upper bracket is used for installing a photovoltaic module;
the upper support and the lower support are sequentially distributed and fixedly connected in the vertical direction;
the shielding layer is arranged between the upper bracket and the lower bracket, the projection of the shielding layer in the vertical direction is used for covering the projection of the photovoltaic module in the vertical direction, and the shielding layer is used for shielding an electric field generated by the photovoltaic module;
the lower support is used for realizing medium-high voltage insulation to the ground.
2. The medium-high voltage photovoltaic bracket assembly according to claim 1, wherein,
the photovoltaic module comprises at least two photovoltaic sub-modules which are sequentially connected in series;
the shielding layer comprises a conductive layer, the conductive layer is formed by a conductive piece, the projection of the conductive layer in the vertical direction is used for covering the projection of the photovoltaic module in the vertical direction, and the conductive layer is used for being connected with one photovoltaic sub-module in an equipotential manner;
or, the shielding layer comprises a semiconductive layer, the semiconductive layer is formed by a semiconductive member, the projection of the semiconductive layer in the vertical direction is used for covering the projection of the photovoltaic module in the vertical direction, and the semiconductive layer is used for being connected with one photovoltaic sub-module in an equipotential manner.
3. The medium-high voltage photovoltaic bracket assembly according to claim 1, characterized in that the shielding layer comprises a film layer and/or an interwoven mesh layer.
4. The medium-high voltage photovoltaic bracket assembly of claim 1, wherein the shielding layer is an integral layer.
5. The medium-high voltage photovoltaic bracket assembly according to claim 1, wherein the shielding layer comprises at least two shielding sublayers, the heights of any two shielding sublayers are not equal, and projections of two adjacent shielding sublayers in the vertical direction have overlapping parts.
6. The medium-high voltage photovoltaic bracket assembly according to claim 1, wherein the shielding layer is perpendicular to the vertical direction or an included angle is formed between the shielding layer and the vertical direction.
7. The medium-high voltage photovoltaic bracket assembly of claim 1, wherein the upper bracket, the shielding layer, and the lower bracket are fixedly connected with a common fastener.
8. The medium-high voltage photovoltaic bracket assembly according to claim 7, wherein the upper bracket and the shielding layer are both provided with threaded through holes in threaded engagement with the fasteners, and the lower bracket is provided with threaded blind holes in threaded engagement with the fasteners.
9. The medium-high voltage photovoltaic bracket assembly according to claim 1, wherein at least two upper brackets and at least two lower brackets are arranged, and the upper brackets and the lower brackets are in one-to-one correspondence;
the heights of any two upper brackets are not equal, or the heights of any two upper brackets are equal;
the heights of any two lower brackets are not equal, or the heights of any two lower brackets are equal.
10. The medium-high voltage photovoltaic bracket assembly according to claim 1, wherein the lower bracket is a medium-high voltage insulating bracket;
or, the lower support includes a lower support section and a lower support section which are distributed in turn along the vertical direction and are fixedly connected, the lower support section is positioned at the top end of the lower support section, the upper support, the shielding layer and the lower support section are fixedly connected, and the lower support section or the lower support section is a medium-high voltage insulating part.
11. The medium-high voltage photovoltaic module according to any one of claims 1-10, further comprising a module connection bracket provided to the upper bracket, the module connection bracket being for mounting the photovoltaic module.
12. The medium-high voltage photovoltaic bracket assembly according to claim 11, wherein at least two upper brackets correspond to one of the assembly connection brackets, at least two upper brackets are sequentially distributed along the length direction of the assembly connection brackets and/or at least two upper brackets are sequentially distributed along the width direction of the assembly connection brackets, and the lower brackets correspond to the upper brackets one by one.
13. The medium-high voltage photovoltaic bracket assembly according to claim 11, wherein the upper bracket and the assembly connection bracket are in one-to-one correspondence, and the lower bracket and the upper bracket are in one-to-one correspondence.
14. A photovoltaic power generation system, comprising: a photovoltaic module and medium-high voltage photovoltaic bracket assembly as claimed in any one of claims 1 to 13.
CN202321666643.0U 2023-06-27 2023-06-27 Medium-high voltage photovoltaic bracket assembly and photovoltaic power generation system Active CN220382983U (en)

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CN202321666643.0U CN220382983U (en) 2023-06-27 2023-06-27 Medium-high voltage photovoltaic bracket assembly and photovoltaic power generation system

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CN220382983U true CN220382983U (en) 2024-01-23

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