Photovoltaic device

Abstract

The invention relates to a photovoltaic device which comprises a plurality of photovoltaic modules, an inverter, an automatic reclosure and a photovoltaic grounding module. The photovoltaic modules are connected with the inverter; the automatic reclosing switch is connected with the inverter, and the automatic reclosing switch is connected with the photovoltaic grounding assembly; wherein the photovoltaic grounding assembly is arranged far away from the photovoltaic assembly. Because the photovoltaic grounding assembly is physically isolated from the photovoltaic assembly, fault current is limited in a grounding loop, and reverse impact on the photovoltaic assembly is avoided. Therefore, safety accidents caused by misjudgment of the user can be avoided. Therefore, double insurance can be realized, potential safety hazards during maintenance are reduced, and the safety of the photovoltaic device is improved.

Description

Technical Field

[0001] This invention relates to the field of photovoltaics, and more specifically to a photovoltaic device. Background Technology

[0002] Guided by the national "dual carbon" goals, distributed photovoltaic (PV) power generation, as a green and low-carbon energy utilization method, is entering thousands of households at an unprecedented speed. In existing PV systems, the connections between PV modules, inverters, reclosing circuits, and grounding systems are complex and unreliable. In the event of a short circuit or grounding fault, users' lack of electrical knowledge may lead to misjudgments, posing safety hazards. Summary of the Invention

[0003] This invention provides the following technical solution: A photovoltaic device includes: multiple photovoltaic modules, an inverter, an automatic reclosing device, and a photovoltaic grounding component; Multiple photovoltaic modules are connected to the inverter; the automatic reclosing switch is connected to the inverter, and the automatic reclosing disconnect switch is connected to the photovoltaic grounding component; The photovoltaic grounding component is positioned away from the photovoltaic component.

[0004] Furthermore, the photovoltaic grounding component includes: a grounding switch, a live display device, and a grounding wire; The live display device is connected to the automatic reclosing switch, the live display device is connected to the grounding switch, and the live display device is connected to the grounding wire.

[0005] Furthermore, the grounding switch includes: a driving mechanism, a first contact, a second contact, and a conductive element; The first contact and the second contact are spaced apart. The driving mechanism is connected to the conductive element. The driving mechanism is used to drive the conductive element to rotate so that the first contact and the second contact are disconnected or connected.

[0006] Furthermore, it also includes: the frame; The frame includes a first part and a second part, the first part being connected to the second part, and the second part extending away from the first part; The first contact is disposed in the first part, and the second contact is disposed in the second part.

[0007] Furthermore, the first contact includes: an insulator, a conductive element, and an extension element; The conductive element is disposed in the insulator, and both ends of the conductive element extend out from the insulator. One end of the conductive element is electrically connected to the live display device, and the other end of the conductive element is connected to the extension member, which has a protrusion.

[0008] Furthermore, the second contact includes: a conductive rod; One end of the conductive rod is provided with a groove, which is used to cooperate with the protrusion so that the conductive element is connected to the conductive rod; the conductive rod is connected to the driving mechanism, and the driving mechanism drives the conductive rod to rotate along the frame.

[0009] Furthermore, the driving mechanism includes: a driving component and a driving plate; The driving component is mounted on the frame. The driving plate is connected to the conductive rod and the driving component. When the driving component rotates, it drives the conductive rod to rotate, so that the conductive rod is connected to the conductive component or disconnected from the conductive component.

[0010] Furthermore, it also includes: spring support components; The spring support is located at the end of the frame away from the conductive rod and is connected to the conductive rod. The spring support has stops on both sides and the stops abut against the drive plate. When the drive unit rotates, the drive plate drives the spring support to move.

[0011] Furthermore, the drive plate includes: an arc-shaped portion, a first limiting portion, and a second limiting portion; The first limiting portion and the second limiting portion are disposed at a distance from the arc-shaped portion, wherein the first limiting portion and the second limiting portion are used to drive the protrusion, and the arc-shaped portion is used to provide a guiding function for the protrusion.

[0012] Furthermore, it also includes: power components; The power assembly is located on one side of the frame and is connected to the drive component. The power assembly is used to drive the drive component to rotate.

[0013] The photovoltaic device of this invention includes multiple photovoltaic modules, which can be installed in different locations. Each photovoltaic module can be connected to an inverter, or multiple photovoltaic modules can be connected to one inverter. The inverter is connected to an automatic reclosing circuit breaker, which can automatically open or close to disconnect or close the circuit. Specifically, the automatic reclosing circuit breaker automatically opens to disconnect the circuit when it detects an abnormal current, and automatically closes to reconnect the circuit after a preset time. A photovoltaic grounding component is used to disconnect or connect the grounding circuit. Specifically, when the automatic reclosing circuit breaker detects a short circuit or grounding fault, it automatically disconnects the inverter output circuit and simultaneously triggers the photovoltaic grounding component to form a grounding path. Because the photovoltaic grounding component is physically isolated from the photovoltaic modules, the fault current is confined to the grounding circuit, avoiding reverse impact on the photovoltaic modules. This avoids safety accidents caused by user misjudgment. This achieves double protection, thereby reducing safety hazards during maintenance and improving the safety of the photovoltaic device. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of a photovoltaic device provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of a photovoltaic grounding component provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of a grounding switch provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of a grounding switch provided in an embodiment of the present invention; Figure 5 for Figure 4 Enlarged view of point A in the middle; Figure 6 This is a schematic diagram of the structure of the second contact provided in an embodiment of the present invention; Explanation of reference numerals in the attached figures: 100-Photovoltaic device; 10-Photovoltaic module; 20-Inverter; 30-Automatic reclosing; 40-Photovoltaic grounding component; 41-Live display device; 42-Grounding wire; 50-Grounding switch; 51-Drive mechanism; 511-Drive component; 512-Drive plate; 513-Arc-shaped part; 514-First limiting part; 515-Second limiting part; 52-First contact; 521-Insulator; 522-Conductive component; 523-Extension component; 524-Protrusion; 53-Second contact; 531-Conductive rod; 532-Groove part; 55-Frame; 551-First part; 552-Second part; 60-Spring support component; 61-Stop block. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this invention are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0018] In this document, references to "embodiment" or "implementation" mean that a particular feature, structure, or characteristic described in connection with an embodiment or implementation may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0019] Please see Figure 1 A photovoltaic device 100 includes: a plurality of photovoltaic modules 10, an inverter 20, an automatic reclosing device 30, and a photovoltaic grounding device 40; Multiple photovoltaic modules 10 are connected to the inverter 20; the automatic reclosing switch 30 is connected to the inverter 20, and the automatic reclosing switch is connected to the photovoltaic grounding component 40; The photovoltaic grounding component 40 is positioned away from the photovoltaic component 10.

[0020] The photovoltaic device 100 of this invention includes multiple photovoltaic modules 10, which can be installed in different locations. Each photovoltaic module 10 can be connected to an inverter 20, or multiple photovoltaic modules 10 can be connected to an inverter 20. The inverter 20 is connected to an automatic reclosing circuit 30, which can automatically open or close to disconnect or close the line. Specifically, the automatic reclosing circuit 30 automatically opens to disconnect the circuit when it detects an abnormal current, and closes to reconnect the line after a preset time. A photovoltaic grounding component 40 is used to disconnect the line or connect the grounding wire 42. Specifically, when the automatic reclosing circuit 30 detects a short circuit or grounding fault, it automatically disconnects the output circuit of the inverter 20 and simultaneously triggers the photovoltaic grounding component 40 to form a grounding path. Because the photovoltaic grounding component 40 is physically isolated from the photovoltaic modules 10, the fault current is limited to the grounding circuit, avoiding reverse impact on the photovoltaic modules 10. This avoids safety accidents caused by user misjudgment. This provides double protection, thereby reducing safety hazards during maintenance and improving the safety of the photovoltaic device 100.

[0021] Please see Figure 2 In some embodiments, the photovoltaic grounding component 40 includes: a grounding switch 50, a live display device 41, and a grounding wire 42; The live display device 41 is connected to the automatic reclosing switch 30, the live display device 41 is connected to the grounding switch 50, and the live display device 41 is connected to the grounding wire 42.

[0022] Understandably, the photovoltaic grounding component 40 includes: a grounding switch 50, a live display device 41, and a grounding wire 42. The live display device 41 is implemented through a combination of a voltage sensor and an indicator light. It monitors the line voltage in real time and sends a control signal to the automatic reclosing switch 30. The live display device 41 is connected to the automatic reclosing switch 30. When the automatic reclosing switch 30 is not de-energized, the live display device 41 is in an off state. When the automatic reclosing switch 30 is de-energized, the grounding switch 50 connects the grounding wire 42, thus connecting the circuit of the live display device 41 and causing the live display device 41 to light up, so as to remind the user that the current line is grounded.

[0023] Understandably, when a ground fault occurs in the line, the automatic reclosing device 30 sends a blocking signal to the live display device 41. After confirming that there is no residual voltage on the line through voltage detection, the live display device 41 triggers the grounding switch 50 to close, making the grounding wire 42 connected to the faulty line. The grounding switch 50 ensures complete isolation from live parts when its contacts are closed through a mechanical interlocking structure. The grounding wire 42 conducts the fault current to the ground through a metal conductor, thus forming a complete fault isolation and discharge circuit. This ensures the safety of the photovoltaic system maintenance process.

[0024] Please see Figure 3 In some embodiments, the grounding switch 50 includes: a drive mechanism 51, a first contact 52, a second contact 53, and a conductive element 522; The first contact 52 and the second contact 53 are spaced apart. The driving mechanism 51 is connected to the conductive element 522. The driving mechanism 51 is used to drive the conductive element 522 to rotate so that the first contact 52 and the second contact 53 are disconnected, or so that the first contact 52 and the second contact 53 are connected.

[0025] Understandably, the first contact 52 and the second contact 53 are spaced apart. The first contact 52 is connected to the grounding switch, and the second contact 53 is connected to the grounding wire 42. The conductive element 522 is used to connect the first contact 52 and the second contact 53. The driving element 511 is connected to the conductive element 522. Therefore, the driving element 511 can drive the conductive element 522 to rotate. When the driving element 511 drives the conductive element 522 to rotate to the first preset angle, the conductive element 522 can connect the first contact 52 and the second contact 53, thereby connecting the grounding wire 42. When the driving element 511 drives the conductive element 522 to rotate to the second preset angle, the first contact 52 is disconnected from the conductive element 522, thus cutting off the grounding wire 42, thereby realizing the physical connection or disconnection of the line. Please see Figure 3 In some implementations, it also includes: a frame 55; The frame 55 includes a first part 551 and a second part 552, the first part 551 is connected to the second part 552, and the second part 552 extends away from the first part 551. The first contact 52 is disposed in the first portion 551, and the second contact 53 is disposed in the second portion 552.

[0026] Understandably, the frame 55 includes a first part 551 and a second part 552. The first part 551 and the second part 552 are two areas on the frame 55 with different spatial distributions. Specifically, they can be connected by welding or bolts to form an extended structure to separate the installation positions of the first contact 52 and the second contact 53. The first contact 52 is a conductive connection end provided on the first part 551 of the frame 55, and the second contact 53 is a movable conductive component provided on the second part 552 of the frame 55. Both the first contact 52 and the second contact 53 can be made of copper alloy material and are used to form an electrical connection with the energized display device 41.

[0027] Please see Figure 6 In some embodiments, the first contact 52 includes: an insulator 521, a conductive element 522, and an extension element 523; The conductive element 522 is disposed in the insulator 521, and both ends of the conductive element 522 extend out from the insulator 521. One end of the conductive element 522 is electrically connected to the live display device 41, and the other end of the conductive element 522 is connected to the extension member 523. The extension member 523 is provided with a protrusion 524.

[0028] Understandably, the first contact 52 includes: an insulator 521, a conductive element 522, and an extension element 523. The insulator 521 is a component used to support the conductive element 522 and achieve electrical isolation. The conductive element 522 is disposed inside the insulator 521, with both ends extending to the outside of the insulator 521. One end is connected to the live display device 41 via a wire, and the other end extends outward via the extension element 523, which is made of ceramic or glass. Its function is to fix the conductive element 522 and prevent current leakage. The conductive element 522 is a metal component used to conduct current, which can be made of copper or aluminum. It is used to form an electrical connection between the live display device 41 and the extension element 523. The extension element 523 is disposed on the conductive element 522. The extension element 523 is used to transmit the current of the conductive element 522 to the second contact 53, and achieves electrical connection by cooperating with the groove portion 532 of the second contact 53 through the protrusion 524, so as to form a stable electrical connection path, thereby avoiding arcing or open circuit problems caused by poor contact.

[0029] Please see Figure 4 In some embodiments, the second contact 53 includes a conductive rod 531; One end of the conductive rod 531 is provided with a groove 532, which is used to cooperate with the protrusion 524 so that the conductive element 522 communicates with the conductive rod 531; the conductive rod 531 is connected to the driving mechanism 51, and the driving mechanism 51 drives the conductive rod 531 to rotate along the frame 55.

[0030] Understandably, the second contact 53 includes: a conductive rod 531; one end of the conductive rod 531 is provided with a groove 532, the groove 532 is a structure that is recessed into the conductive rod 531, and it can be configured as a U-shaped groove. The electrical connection between the first contact 52 and the second contact 53 is achieved by the engagement of the groove and the protrusion 524; the driving mechanism 51 is connected to the conductive rod 531. When the driving mechanism 51 drives the conductive rod 531 to rotate, the groove 532 rotates so that the groove 532 engages with the protrusion 524 or separates from the protrusion 524.

[0031] Please see Figure 4 and Figure 5 In some embodiments, the drive mechanism 51 includes: a drive member 511 and a drive plate 512; The driving component 511 is mounted on the frame 55. The driving plate 512 is connected to the conductive rod 531 and the driving component 511. When the driving component 511 rotates, it drives the conductive rod 531 to rotate, so that the conductive rod 531 is connected to the conductive element 522, or the conductive rod 531 is disconnected from the conductive element 522.

[0032] Understandably, the drive mechanism 51 includes a drive component 511 and a drive plate 512. The drive component 511 is fixedly mounted on the frame 55. The drive plate 512 and the conductive component 522 are both connected to the drive component 511. When the drive component 511 rotates, it can drive the drive plate 512 and the conductive component 522 to rotate. Specifically, when the drive component 511 rotates, the drive plate 512 moves in a circular motion around the output shaft, while the conductive rod 531 rotates around the frame 55, so that the groove 532 of the conductive rod 531 forms a cooperative or disengaged state with the protrusion 524 of the conductive component 522 during the rotation, thereby realizing the circuit is turned on or off.

[0033] Please see Figure 4 and Figure 5 In some embodiments, it also includes: a spring support 60; The spring support 60 is located at the end of the frame 55 away from the conductive rod 531, and the spring support 60 is connected to the conductive rod 531. The spring support 60 has stops 61 on both sides, and the stops 61 abut against the drive plate 512. When the drive member 511 rotates, the drive plate 512 drives the spring support 60 to move.

[0034] Understandably, the spring support 60 is located at the end of the frame 55 away from the conductive rod 531, and the spring support 60 is hinged to the conductive rod 531. The spring support 60 is used to provide support for the conductive rod 531. Stops 61 are provided on both sides of the spring support 60. The stops 61 are used to cooperate with the drive plate 512. Specifically, when the drive member 511 is triggered to rotate, the drive plate 512 rotates and contacts the stop 61, pushing the stop 61 to rotate, so that the spring support rod is shortened. This causes the spring support 60 to rotate around the intersection point with the conductive rod 531, so that the spring support 60 loses its supporting function for the conductive rod 531. When the drive member 511 rotates again, the drive plate 512 rotates and pushes the stop 61 to rotate, so that the spring support rod is reset. In this way, the spring support 60 can continue to support the conductive rod 531, so as to ensure the stability and operational reliability of the grounding switch 50 during operation.

[0035] Please see Figure 4 In some embodiments, the drive plate 512 includes: an arc-shaped portion 513, a first limiting portion 514, and a second limiting portion 515; The first limiting part 514 and the second limiting part 515 are disposed at a distance from the arc-shaped part 513, wherein the first limiting part 514 and the second limiting part 515 are used to drive the protrusion 524, and the arc-shaped part 513 is used to provide a guiding function for the protrusion 524.

[0036] Understandably, the drive plate 512 has an arc-shaped portion 513, a first limiting portion 514, and a second limiting portion 515. The first limiting portion 514 and the second limiting portion 515 are located on both sides of the arc-shaped portion 513. Both the first limiting portion 514 and the second limiting portion 515 are blocking structures provided on both sides of the arc-shaped portion 513, used to drive and guide the stop block 61 provided on the spring support member 60. Specifically, the first limiting portion 514 drives the stop block 61 to move downward, so that the spring support member 60 cancels its supporting effect on the conductive rod 531. The second limiting portion 515 is used to drive the stop block 61 to move upward, so that the spring can restore its supporting effect on the support member, thereby improving operational stability and reliability.

[0037] In some implementations, it also includes: a power assembly; The power assembly is located on one side of the frame 55 and is connected to the drive member 511. The power assembly is used to drive the drive member 511 to rotate.

[0038] Understandably, the power unit is located on one side of the frame 55. The power unit is a component that generates rotational force and is connected to the drive component 511. When the power unit rotates, it drives the drive component 511 to rotate. When the drive component 511 rotates, it drives the conductive rod 531 to move along the rotation direction of the frame 55, thereby automatically opening or closing the grounding switch 50. During this process, the spring support 60 abuts against the drive plate 512 via the stop block 61, allowing the spring support 60 to support the conductive rod 531, thus improving the stability of the conductive rod 531.

[0039] In this invention, the terms "embodiment" and "implementation" mean that a specific feature, structure, or characteristic described in connection with an embodiment can be included in at least one embodiment of the invention. The appearance of these phrases in various places in the specification does not necessarily refer to the same embodiment, nor are they independent or alternative embodiments mutually exclusive with other embodiments. Those skilled in the art will understand, explicitly and implicitly, that the embodiments described in this invention can be combined with other embodiments. Furthermore, it should be understood that the features, structures, or characteristics described in the various embodiments of this invention can be arbitrarily combined to form yet another embodiment that does not depart from the spirit and scope of the technical solution of this invention, provided there is no contradiction between them.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to the above preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions to the technical solutions of the present invention should not depart from the spirit and scope of the technical solutions of the present invention.

Claims

1. A photovoltaic device (100), characterized by The utility model relates to a photovoltaic system, including: a plurality of photovoltaic components (10), an inverter (20), an automatic reclosing device (30), a photovoltaic grounding component (40); a plurality of the photovoltaic components (10) are connected with the inverter (20); the automatic reclosing device (30) is connected with the inverter (20), and the automatic reclosing device is connected with the photovoltaic grounding component (40); Wherein, the photovoltaic grounding component (40) is away from the photovoltaic component (10) setting.

2. The photovoltaic device (100) according to claim 1, characterized in that The photovoltaic grounding component (40) includes: ground knife switch (50), live display device (41), ground wire (42); The live display device (41) is connected with the automatic reclosing device (30), and the live display device (41) is connected with the ground knife switch (50), and the live display device (41) is connected with the ground wire (42).

3. The photovoltaic device (100) according to claim 2, characterized in that The ground knife switch (50) includes: drive mechanism (51), first contact (52), second contact (53), conducting part (522); The first contact (52) and the second contact (53) are spaced apart, the drive mechanism (51) is connected with the conducting part (522), and the drive mechanism (51) is used to drive the conducting part (522) to rotate to make the first contact (52) and the second contact (53) disconnect, or make the first contact (52) and the second contact (53) connect.

4. The photovoltaic device (100) according to claim 3, characterized in that Further including: frame body (55); The frame body (55) includes first part (551) and second part (552), the first part (551) is connected with the second part (552), and the second part (552) extends away from the first part (551); Wherein, the first contact (52) is arranged in the first part (551), and the second contact (53) is arranged in the second part (552).

5. The photovoltaic device (100) according to claim 4, characterized in that The first contact (52) includes: insulator (521), conducting part (522), extension part (523); The conducting part (522) is arranged in the insulator (521), and both ends of the conducting part (522) extend out of the insulator (521), wherein one end of the conducting part (522) is electrically connected with the live display device (41), the other end of the conducting part (522) is connected with the extension part (523), and the extension part (523) is provided with a protruding portion (524).

6. The photovoltaic device (100) according to claim 5, characterized in that The second contact (53) includes: conducting rod (531); One end of the conducting rod (531) is provided with a recess portion (532), and the recess portion (532) is used for cooperating with the protruding portion (524) to make the conducting part (522) and the conducting rod (531) communicate;The conducting rod (531) is connected with the drive mechanism (51), and the drive mechanism (51) drives the conducting rod (531) to rotate along the frame body (55).

7. The photovoltaic device (100) according to claim 6, characterized in that The drive mechanism (51) includes: driving piece (511), drive plate (512); The driving member (511) is arranged on the frame body (55), the driving plate (512) is connected with the conductive rod (531) and the driving member (511), when the driving member (511) rotates, the conductive rod (531) is driven to rotate, so that the conductive rod (531) is in conduction with the conductive member (522), or the conductive rod (531) is disconnected with the conductive member (522).

8. The photovoltaic device (100) according to claim 7, characterized in that Further comprising: A spring support (60); The spring support (60) is arranged at one end of the frame body (55) away from the conductive rod (531), and the spring support (60) is connected with the conductive rod (531), both sides of the spring support (60) are provided with a stop block (61), the stop block (61) is abutted with the driving plate (512), when the driving member (511) rotates, the driving plate (512) drives the spring support (60) to move.

9. The photovoltaic device (100) according to claim 6, characterized in that The driving plate (512) comprises: an arc-shaped part (513), a first limiting part (514), a second limiting part (515); The first limiting part (514) and the second limiting part (515) are arranged at intervals from the arc-shaped part (513), wherein the first limiting part (514) and the second limiting part (515) are used for driving the protruding part (524), and the arc-shaped part (513) is used for providing a guiding action for the protruding part (524).

10. The photovoltaic device (100) according to claim 6, characterized in that Further comprising: A power assembly; The power assembly is arranged on one side of the frame body (55), the power assembly is connected with the driving member (511), and the power assembly is used for driving the driving member (511) to rotate.

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