Intelligent distribution box for photovoltaic grid-connected power generation system

Abstract

The invention relates to an intelligent distribution box for a photovoltaic grid-connected power generation system, which is applied to the related technical field of distribution boxes, through the arrangement of a shell electrification monitoring unit, part of current gathered on a distribution box shell due to an electromagnetic effect can be guided into an electricity gathering bottom plate, and along with the increase of the current or the prolonging of the electrification time, the electricity gathering bottom plate can collect electricity; on the basis of this, on one hand, an alarm can be triggered, on the other hand, the heat sensing row can be visually gathered on one side, so that the electrification abnormity of the distribution box shell can be timely found, in addition, when the electrification quantity is too large, under the arrangement of the electricity changing unit, the flow direction of current can be effectively changed, the shell is secondarily grounded, and the electricity utilization rate of the distribution box is improved. Compared with the prior art, whether the shell is electrified or not and the electrified quantity can be monitored to a certain extent, the current flow direction is changed, excessive continuous accumulation of current on the shell is avoided, the problem that the shell is electrified due to the electromagnetic effect is effectively solved, and potential safety hazards are reduced.

Description

Technical Field

[0001] The present invention relates to an intelligent distribution box, and in particular to an intelligent distribution box for a photovoltaic grid-connected power generation system applied in the technical field related to distribution boxes. Background Art

[0002] The electric energy generated by the power generation system needs to be distributed with the help of the distribution box. The distribution box is an important component of the low-voltage distribution network. It is responsible for the distribution and management of electrical wiring. It requires the switchgear, measuring instruments, protective electrical appliances and auxiliary equipment to be assembled in a closed or semi-closed metal cabinet or on a screen.

[0003] At present, the distribution box is equipped with a corresponding anti-leakage device to ensure that the shell of the distribution box cannot be charged. For example, the specification of Chinese patent CN214673719U discloses a distribution box with an anti-leakage protection mechanism. During use, the electromagnetic effect generated by the internal distribution components of the distribution box will be partially transmitted to the shell. However, it is generally difficult to measure the charge of the shell. When the shell is charged to a certain value, there will be a safety hazard if it is touched.

[0004] To solve the above problems, the specification of Chinese patent CN114172029A discloses a leakage-proof intelligent power generation system distribution box and its assembly method. The inventive device is equipped with an insulating pad and a leakage detector. The insulating pad can effectively prevent the electromagnetic effect generated by the electrical equipment from being transmitted to the distribution box shell, and the leakage detector can measure the distribution box shell and promptly serve as an alarm when leakage occurs in the distribution box, effectively avoiding leakage touch, and solving the problem that the distribution box shell is charged mainly due to the electromagnetic effect.

[0005] However, in the prior art, the use of insulating pads is a conventional measure to prevent leakage. In this case, there is still a risk of the shell being charged, which means that the above patent cannot effectively solve the problem of the shell being charged when only insulating pads are used. At the same time, when the shell of the distribution box is charged, it is difficult to detect, resulting in a greater safety hazard. Summary of the invention

[0006] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that the electromagnetic effect generated by the electrical equipment is transmitted to the housing of the distribution box, resulting in the distribution box still having the safety hazard of leakage even though the leakage prevention device is promptly installed.

[0007] In order to solve the above problems, the present invention provides an intelligent distribution box for a photovoltaic grid-connected power generation system, including a distribution box equipped with an anti-leakage device, an alarm and a control center installed on the distribution box, the power on and off of the distribution box is controlled by a relay, an insulating pad is laid on the ground where the distribution box is located, an electric power collecting bottom plate is fixedly connected to the upper end of the insulating pad, four embedded grooves are cut on the upper end of the electric power collecting bottom plate, and the four corners of the bottom of the distribution box are respectively fixedly connected with ground feet, which are embedded in the corresponding embedded grooves;

[0008] A warning groove is also excavated at the upper end of the polyelectric bottom plate, and a transparent cover is provided on the mouth of the warning groove. A shell charge monitoring unit is arranged in the polyelectric bottom plate, and the shell charge monitoring unit includes a heat-sensitive bar installed in the warning groove and a conductive unit fixedly embedded in the polyelectric bottom plate. The heat-sensitive bar includes multiple heat-conducting strips and multiple heat-sensitive wires respectively fixedly connected between two adjacent heat-conducting strips and between the inner wall of the warning groove on one side close to the distribution box and the adjacent heat-conducting strips. The conductive unit includes four conductive sheets respectively located at the bottom of the embedded groove, multiple heating wires connected in series directly below the warning groove, and multiple conductive wires between the multiple conductive sheets and the heating wires. The multiple conductive sheets are connected in series, and a temperature sensor is installed at the bottom of the warning groove.

[0009] In the above-mentioned intelligent distribution box for photovoltaic grid-connected power generation system, by setting the shell charge monitoring unit, it is possible to monitor whether the shell of the distribution box is charged and the amount of charge. When the charge is too high, an early warning can be given in time, which is convenient for the staff to carry out maintenance in time, thereby effectively eliminating safety hazards.

[0010] As a further improvement of the present application, the thermal conductive strip is made of a high thermal conductivity material, the thermal wire is a two-way memory alloy, and the critical temperature of the thermal wire is higher than 45°C and within the range of the safe operating temperature of the distribution box; below the critical temperature, the thermal wire is straight; above the critical temperature, the thermal wire is spiral.

[0011] As another improvement of the present application, a support bar is fixedly connected to the bottom of the warning groove, and the support bar is located at the end of the heat-sensitive bar away from the distribution box. The shell live monitoring unit also includes a re-inspection unit fixedly connected to the heat-sensitive bar, and the end of the re-inspection unit away from the heat-sensitive bar is fixedly connected to the inner wall of the warning groove.

[0012] As another improved supplement of the present application, the re-inspection unit includes a reset rope fixedly connected to the inner wall of the warning groove, a pull rope fixedly connected to the thermal conductive strip farthest from the distribution box, and a tension sensor fixedly connected between the reset rope and the pull rope, the lower end of the tension sensor is in contact with the upper surface of the support bar, and the upper end of the support bar close to the distribution box is fixedly connected to a limiting block.

[0013] As another improved supplement of the present application, the reset rope is an elastic structure and the pull rope is a non-elastic structure.

[0014] As another improvement of the present application, the conductive wire includes a follower segment connected to the heating wire, a fixed segment connected to the conductive sheet, and an electrical modification unit connected between the fixed segment and the follower segment. An electrical modification groove is also opened at the lower end of the electrical concentrating bottom plate, and the electrical modification unit is located in the electrical modification groove.

[0015] As another improved supplement of the present application, the power conversion unit includes four transformer main rings respectively mounted on the outer ends of the four fixed sections, four transformer sub-rings respectively fixedly connected to the ends of the four fixed sections, and an electric wire fixedly connected to the outer end of one of the transformer main rings, the electric wire is connected to the grounding terminal of the distribution box, and the four transformer main rings are connected in series with each other, and a positioning rod is fixedly connected between the transformer main ring located above and the top of the power conversion slot, a non-conductive connecting rod is fixedly connected between two adjacent transformer sub-rings, an electric push rod is fixedly connected between the lowest transformer sub-ring and the bottom of the power conversion slot, the end of the follower segment passes through the corresponding transformer sub-ring, and the follower segment contacts with the top of the transformer sub-ring, and the fixed section is coaxial with the transformer main ring.

[0016] As another improvement supplement to the present application, the transformer main ring and the transformer sub-ring are both made of low-resistance conductive material, and an insulating air bag is fixedly connected to the lower inner wall of the transformer sub-ring, and the upper end of the insulating air bag is flush with the horizontal center line of the transformer sub-ring, and the inner diameter of the transformer sub-ring is smaller than the inner diameter of the transformer main ring.

[0017] As a supplement to another improvement of the present application, the monitoring method of the housing live monitoring unit includes the following steps:

[0018] S1. When the shell of the distribution box is charged, the current is transmitted along the ground pin to the conductive unit, causing the electric heating ribbon to heat up. The temperature sensor is used to monitor the temperature change in the warning slot in real time and compare it with the ambient temperature in real time. If the difference is not large, it means that there is no electricity or the amount of electricity is very small; the greater the temperature difference, the more electricity is charged in the shell of the distribution box;

[0019] S2. When the temperature rises to the preset threshold, the control center controls the power conversion unit to work, that is, the electric push rod is extended, so that the fixed section is connected to the wire, and then the shell is grounded for the second time, so that the current is discharged into the ground, reducing safety hazards;

[0020] S3. After performing step S2, if the data measured by the temperature sensor is still rising, in order to eliminate the abnormality of the temperature sensor, the control center will generate force data when the rope is pulled synchronously, indicating that the temperature has indeed risen. At this time, the heat-sensitive bar will show a one-sided aggregation phenomenon, which can provide visual prompts to the staff. The synchronized signal can be fed back to the alarm on the distribution box, causing the alarm to sound, prompting the staff to take corresponding measures in time, and at the same time controlling the relay to cut off the power supply to the distribution cabinet.

[0021] In summary, through the setting of the shell charge monitoring unit, part of the current gathered on the distribution box shell due to the electromagnetic effect can be guided to the charge-gathering bottom plate. As the current increases or the charge time prolongs, local concentrated heat will occur in the charge-gathering bottom plate. Based on this, on the one hand, an alarm can be triggered, and on the other hand, the heat-sensitive row can be visually concentrated on one side, so as to timely detect the abnormal charge of the distribution box shell. In addition, when the charge is too much, under the setting of the power change unit, the direction of the current can be effectively changed, so that the shell can be grounded secondary. Compared with the existing technology, it can realize a certain monitoring of whether the shell is charged and the charge amount, change the current direction, avoid excessive and continuous accumulation of current on the shell, and then effectively alleviate the problem of shell charge caused by electromagnetic effect and reduce safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a three-dimensional diagram of the first embodiment of the present application;

[0023] Figure 2 A three-dimensional diagram of the electric concentrating bottom plate of the first embodiment of the present application;

[0024] Figure 3 This is a cross-sectional view of the electric concentrator bottom plate of the first embodiment of the present application;

[0025] Figure 4 This is a three-dimensional diagram of the first embodiment of the present application when the heat-sensitive row is gathered on one side;

[0026] Figure 5 A cross-sectional view of the electric concentrating bottom plate portion of the second embodiment of the present application;

[0027] Figure 6 This is a cross-sectional view of the portion of the heat-sensing row in the electric-concentrating bottom plate of the second embodiment of the present application when one-side concentration occurs;

[0028] Figure 7 This is a diagram showing the changes of the re-inspection unit of the second embodiment of the present application when the shell has a large amount of charge;

[0029] Figure 8 A side view of the power unit portion of the second embodiment of the present application;

[0030] Fig. 9 This is a front comparison diagram of the transformer main ring and the transformer sub-ring when the conductive unit is in the on state in the second embodiment of the present application;

[0031] Fig.10 This is a frontal comparison diagram of the transformer main ring and transformer sub-ring when the transformer unit is in the connected state in the second embodiment of the present application;

[0032] Fig.11 This is the main principle diagram of the second implementation method of this application.

[0033] Description of the numbers in the figure:

[0034] 1 distribution box, 101 ground anchor, 2 polyelectric base plate, 21 transparent cover, 22 support bar, 23 limit block, 201 embedded slot, 202 warning slot, 203 temperature sensor, 204 modified slot, 3 heat sensing row, 31 thermal conductive strip, 32 thermal wire, 4 insulating pad, 51 conductive sheet, 52 conductive wire, 521 fixed section, 522 follower section, 53 heating wire, 7 re-inspection unit, 71 reset rope, 72 pull rope, 73 tension sensor, 801 positioning rod, 802 electric push rod, 81 transformer main ring, 82 transformer electronic ring, 83 insulating airbag, 9 wires. DETAILED DESCRIPTION

[0035] Two implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0036] The first implementation method:

[0037] Figure 1-2 It is shown that an intelligent distribution box for a photovoltaic grid-connected power generation system comprises a distribution box 1 equipped with an anti-leakage device, an alarm and a control center are installed on the distribution box 1, the power on and off of the distribution box 1 is controlled by a relay, an insulating pad 4 is laid on the ground where the distribution box 1 is located, an electric power collecting bottom plate 2 is fixedly connected to the upper end of the insulating pad 4, four embedded grooves 201 are cut on the upper end of the electric power collecting bottom plate 2, and the four corners of the bottom of the distribution box 1 are respectively fixedly connected with the ground feet 101, 102 embedded in the corresponding embedded grooves 201;

[0038] like Figure 2-3A warning groove 202 is also opened at the upper end of the power-gathering bottom plate 2, and a transparent sealing cover 21 is provided at the mouth of the warning groove 202. A shell charge monitoring unit is arranged in the power-gathering bottom plate 2. In the above-mentioned intelligent distribution box for photovoltaic grid-connected power generation system, through the setting of the shell charge monitoring unit, whether the shell of the distribution box 1 is charged and the amount of charge can be monitored to a certain extent. When the charge is too high, an early warning can be given in time, which is convenient for the staff to carry out maintenance in time, thereby effectively eliminating safety hazards. The shell charge monitoring unit includes a heat-sensitive row 3 installed in the warning groove 202 and a conductive unit fixedly embedded in the power-gathering bottom plate 2. The heat-sensitive row 3 includes a plurality of heat-conducting strips 31 and a plurality of heat-conducting strips 31 respectively fixedly connected between two adjacent heat-conducting strips 31, and a plurality of warning strips 31 respectively fixedly connected between two adjacent heat-conducting strips 31. The warning slot 202 is close to the inner wall of one side of the distribution box 1 and the heat-sensitive wire 32 between the adjacent heat-conducting strip 31. The conductive unit includes four conductive sheets 51 respectively located at the bottom of the embedded slot 201, a plurality of heating wires 53 connected in series and located directly below the warning slot 202, and a plurality of conductive wires 52 between the plurality of conductive sheets 51 and the heating wires 53. The plurality of conductive sheets 51 are connected in series. A temperature sensor 203 is installed at the bottom of the warning slot 202. The heat-conducting strip 31 is made of a high thermal conductivity material. The heat-sensitive wire 32 is a two-way memory alloy. The critical temperature of the heat-sensitive wire 32 is higher than 45°C and is within the range of the safe operating temperature of the distribution box 1. When the critical temperature is below the critical temperature, the heat-sensitive wire 32 is straight; when the critical temperature is above the critical temperature, the heat-sensitive wire 32 is spiral.

[0039] When the charge on the shell of the distribution box 1 is too much, the current is transmitted along the conductive sheet 51 and the conductive wire 52 to the heating wire 53, so that the heating wire 53 is energized and then heats up. At this time, the limit block 23 will monitor the obvious rise in temperature. When it exceeds the preset value, it can be fed back to the control center to control the alarm to alarm, which serves as a warning to the staff, so as to facilitate timely corresponding processing and reduce safety hazards. Figure 4 At the same time, when the temperature rises to the critical temperature of the heat-sensitive wire 32, the heat-sensitive wire 32 will gradually become a spiral shape, so that the multiple heat-conducting strips 31 will be unidirectionally gathered toward one side of the distribution box 1, visually warning the staff and greatly reducing safety hazards compared to the existing technology.

[0040] The second implementation method:

[0041] Based on the first embodiment, this embodiment adds a re-inspection unit 7 and its related structures, and the rest of the parts are consistent with the first embodiment.

[0042] like Figure 5-7A support bar 22 is fixedly connected to the bottom of the warning groove 202, and the support bar 22 is located at the end of the heat-sensitive bar 3 away from the distribution box 1. The shell live monitoring unit also includes a re-inspection unit 7 fixedly connected to the heat-sensitive bar 3, and the end of the re-inspection unit 7 away from the heat-sensitive bar 3 is fixedly connected to the inner wall of the warning groove 202. The re-inspection unit 7 includes a reset rope 71 fixedly connected to the inner wall of the warning groove 202, a pull rope 72 fixedly connected to the thermal conductive bar 31 farthest from the distribution box 1, and a tension sensor 73 fixedly connected between the reset rope 71 and the pull rope 72. The lower end of the tension sensor 73 contacts the upper surface of the support bar 22, and the upper end of the support bar 22 close to the distribution box 1 is fixedly connected to the limit block 23. The reset rope 71 is an elastic structure, and the pull rope 72 is a non-elastic structure. When the heat-sensing row 3 gathers on one side, it will generate tension on the re-inspection unit 7, thereby stretching the reset rope 71 and moving along the surface of the support bar 22 toward the side of the distribution box 1 until it conflicts with the limit block 23. In this process, the tension sensor 73 generates force data due to the force, thereby judging that the charging bottom plate 2 is indeed overheated, that is, the shell of the distribution box 1 is charged and the charge is large. The setting of the re-inspection unit 7 can serve as a double insurance, which effectively avoids the situation where the temperature sensor 203 is difficult to monitor the distribution box 1 shell with a large charge in time after an abnormality occurs, thereby further ensuring that safety hazards are not prone to occur.

[0043] Figure 8 As shown, the conductive wire 52 includes a follower segment 522 connected to the electric heating wire 53, a fixed segment 521 connected to the conductive sheet 51, and a power-changing unit connected between the fixed segment 521 and the follower segment 522. A power-changing groove 204 is also opened at the lower end of the power-collecting bottom plate 2. The power-changing unit is located in the power-changing groove 204. The power-changing unit includes four transformer main rings 81 respectively sleeved on the outer ends of the four fixed segments 521, four transformer sub-rings 82 respectively fixedly connected to the ends of the four fixed segments 521, and a wire 9 fixedly connected to the outer end of one of the transformer main rings 81. The wire 9 is connected to the grounding terminal of the distribution box 1, and the four transformer main rings 81 are connected in series with each other, and a positioning rod 801 is fixedly connected between the transformer main ring 81 located at the top and the top of the transformer slot 204, and a non-conductive connecting rod is fixedly connected between two adjacent transformer sub-rings 82, and an electric push rod 802 is fixedly connected between the lowest transformer sub-ring 82 and the bottom of the transformer slot 204, the end of the follower segment 522 passes through the corresponding transformer sub-ring 82, and the follower segment 522 contacts the top of the transformer sub-ring 82, and the fixed segment 521 is coaxial with the transformer main ring 81, as shown in FIG. Fig. 9 Under normal circumstances, the fixed segment 521 is coaxial with the transformer main ring 81, that is, it does not contact it, and the follower segment 522 is in contact with the transformer sub-ring 82, so that the conductive unit is connected, that is, the current of the shell of the distribution box 1 will directly lead to the heating wire 53 to make it heat up. When the temperature is detected to be too high by the temperature sensor 203, it means that the charge is too high. Fig.10At this time, the control center controls the electric push rod 802 to extend, thereby moving the transformer sub-ring 82 upward, disconnecting the follower segment 522 from the transformer sub-ring 82, and at the same time raising the fixed segment 521 to make it contact with the transformer main ring 81. At this time, the power conversion unit is turned on, which can guide the large amount of current gathered on the distribution box 1 to the grounding terminal, thereby avoiding excessive current accumulation, further reducing safety hazards, and at the same time, it saves the staff from having to perform manual intervention maintenance every time, reducing the complexity of the operation.

[0044] The transformer main ring 81 and the transformer sub-ring 82 are both made of low-resistance conductive materials. An insulating air bag 83 is fixedly connected to the lower inner wall of the transformer sub-ring 82, and the upper end of the insulating air bag 83 is flush with the horizontal center line of the transformer sub-ring 82. The inner diameter of the transformer sub-ring 82 is smaller than the inner diameter of the transformer main ring 81, so that when the fixed segment 521 contacts the transformer main ring 81, the follower segment 522 is embedded in the insulating air bag 83, thereby effectively ensuring the stable disconnection of the conductive unit.

[0045] like Fig.11 The monitoring method of the shell live monitoring unit includes the following steps:

[0046] S1. When the shell of the distribution box 1 is charged, the current is transmitted along the foot 101 to the conductive unit, so that the heating wire 53 is charged and heated. The temperature sensor 203 is used to monitor the temperature change in the warning slot 202 in real time and compare it with the ambient temperature in real time. If the difference is not large, it means that there is no electricity or the amount of electricity is very small; the greater the temperature difference, the more electricity is charged in the shell of the distribution box 1;

[0047] S2. When the temperature rises to a preset threshold, the control center controls the power conversion unit to work, that is, the electric push rod 802 is extended, so that the fixed section 521 is connected to the wire 9, and then the shell is grounded for the second time, so that the current is discharged into the ground, reducing safety hazards;

[0048] S3. After performing step S2, when the data measured by the temperature sensor 203 is still rising, in order to eliminate the abnormality of the temperature sensor 203, the control center generates force data on the pull rope 72 synchronously, indicating that the temperature has indeed risen. At this time, the heat-sensitive row 3 will show a unilateral aggregation phenomenon, which can provide visual prompts to the staff. The synchronized signal can be fed back to the alarm on the distribution box 1, causing the alarm to sound, prompting the staff to take corresponding measures in time, and at the same time controlling the relay to cut off the power supply to the distribution cabinet.

[0049] In summary, through the setting of the shell charge monitoring unit, part of the current gathered on the shell of the distribution box 1 due to the electromagnetic effect can be guided to the charge-gathering bottom plate 2. As the current increases or the charge time prolongs, local concentrated heat will occur in the charge-gathering bottom plate 2. Based on this, on the one hand, an alarm can be triggered, and on the other hand, the heat-sensitive row 3 can be visually gathered on one side, so as to timely detect the abnormal charge of the shell of the distribution box 1. In addition, when the charge is too much, under the setting of the charge-changing unit, the direction of the current can be effectively changed, so that the shell can be grounded secondary. Compared with the prior art, it can realize a certain monitoring of whether the shell is charged and the charge amount, change the direction of the current, avoid excessive and continuous accumulation of current on the shell, and then effectively alleviate the problem of shell charge caused by electromagnetic effect, and reduce safety hazards.

[0050] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. An intelligent distribution box for a photovoltaic grid-connected power generation system, comprising a distribution box (1) equipped with an anti-leakage device, an alarm and a control center installed on the distribution box (1), and the power on and off of the distribution box (1) is controlled by a relay, characterized in that: The ground where the distribution box (1) is located is paved with an insulating pad (4), the upper end of the insulating pad (4) is fixedly connected to a power-gathering bottom plate (2), the upper end of the power-gathering bottom plate (2) is provided with four embedded grooves (201), the four corners of the bottom of the distribution box (1) are respectively fixedly connected to the ground feet (101), and the (102) are embedded in the corresponding embedded grooves (201); The upper end of the power collecting bottom plate (2) is also provided with a warning groove (202), the mouth of the warning groove (202) is covered with a transparent cover (21), a shell charge monitoring unit is arranged in the power collecting bottom plate (2), the shell charge monitoring unit comprises a heat-sensitive row (3) installed in the warning groove (202) and a conductive unit fixedly embedded in the power collecting bottom plate (2), the heat-sensitive row (3) comprises a plurality of heat-conducting strips (31) and a plurality of heat-conducting strips (31) respectively fixedly connected between two adjacent heat-conducting strips (31) and the warning groove ( 202) is close to a heat-sensing wire (32) between the inner wall of one side of the distribution box (1) and the adjacent heat-conducting strip (31), the conductive unit comprises four conductive sheets (51) respectively located at the bottom of the embedded groove (201), a plurality of heating wires (53) connected in series and located directly below the warning groove (202), and a plurality of conductive wires (52) between the plurality of conductive sheets (51) and the heating wires (53), the plurality of conductive sheets (51) being connected in series, and a temperature sensor (203) being installed at the bottom of the warning groove (202).

2. According to claim 1, the intelligent distribution box for photovoltaic grid-connected power generation system is characterized in that: The heat-conducting strip (31) is made of a high-thermal-conductivity material, the heat-sensitive wire (32) is a two-way memory alloy, and the critical temperature of the heat-sensitive wire (32) is higher than 45° C. and is within the range of the safe operating temperature of the distribution box (1); below the critical temperature, the heat-sensitive wire (32) is straight; above the critical temperature, the heat-sensitive wire (32) is spiral.

3. The intelligent distribution box for a photovoltaic grid-connected power generation system according to claim 1, characterized in that: A support bar (22) is fixedly connected to the bottom of the warning groove (202), and the support bar (22) is located at one end of the heat-sensitive bar (3) away from the distribution box (1). The housing live monitoring unit also includes a re-inspection unit (7) fixedly connected to the heat-sensitive bar (3), and one end of the re-inspection unit (7) away from the heat-sensitive bar (3) is fixedly connected to the inner wall of the warning groove (202).

4. The intelligent distribution box for a photovoltaic grid-connected power generation system according to claim 3, characterized in that: The recheck unit (7) comprises a reset rope (71) fixedly connected to the inner wall of the warning groove (202), a pull rope (72) fixedly connected to the thermal conductive strip (31) farthest from the distribution box (1), and a tension sensor (73) fixedly connected between the reset rope (71) and the pull rope (72), wherein the lower end of the tension sensor (73) contacts the upper surface of the support strip (22), and the upper end of the support strip (22) on the side close to the distribution box (1) is fixedly connected to the limit block (23).

5. The intelligent distribution box for a photovoltaic grid-connected power generation system according to claim 4, characterized in that: The reset rope (71) is an elastic structure, and the pull rope (72) is a non-elastic structure.

6. The intelligent distribution box for a photovoltaic grid-connected power generation system according to claim 1, characterized in that: The conductive wire (52) comprises a follower section (522) connected to the electric heating wire (53), a fixed section (521) connected to the conductive sheet (51), and a power-changing unit connected between the fixed section (521) and the follower section (522); a power-changing groove (204) is also formed at the lower end of the power-collecting bottom plate (2); and the power-changing unit is located in the power-changing groove (204).

7. The intelligent distribution box for a photovoltaic grid-connected power generation system according to claim 6, characterized in that: The power conversion unit comprises four power conversion main rings (81) respectively sleeved on the outer ends of four fixed sections (521), four power conversion sub-rings (82) respectively fixedly connected to the ends of the four fixed sections (521), and an electric wire (9) fixedly connected to the outer end of one of the power conversion main rings (81), wherein the electric wire (9) is connected to the grounding terminal of the distribution box (1), and the four power conversion main rings (81) are connected in series with each other, and the power conversion main ring (81) located at the top is connected to the top of the power conversion slot (204). A positioning rod (801) is fixedly connected between the parts, a non-conductive connecting rod is fixedly connected between two adjacent transformer sub-rings (82), an electric push rod (802) is fixedly connected between the lowest transformer sub-ring (82) and the bottom of the transformer slot (204), the end of the follower segment (522) passes through the corresponding transformer sub-ring (82), and the follower segment (522) contacts the top of the transformer sub-ring (82), and the fixed segment (521) is coaxial with the transformer main ring (81).

8. The intelligent distribution box for a photovoltaic grid-connected power generation system according to claim 7, characterized in that: The transformer main ring (81) and the transformer sub-ring (82) are both made of low-resistance conductive material. The lower inner wall of the transformer sub-ring (82) is also fixedly connected with an insulating airbag (83), and the upper end of the insulating airbag (83) is flush with the horizontal center line of the transformer sub-ring (82). The inner diameter of the transformer sub-ring (82) is smaller than the inner diameter of the transformer main ring (81).

9. The intelligent distribution box for a photovoltaic grid-connected power generation system according to claim 8, characterized in that: The monitoring method of the housing charge monitoring unit comprises the following steps: S1. When the shell of the distribution box (1) is charged, the current is transmitted along the foot (101) to the conductive unit, causing the heating wire (53) to be charged and heated. The temperature sensor (203) is used to monitor the temperature change in the warning slot (202) in real time and compare it with the ambient temperature in real time. If the difference is not large, it means that there is no electricity or the amount of electricity is very small; the greater the temperature difference, the more electricity the shell of the distribution box (1) is charged with; S2. When the temperature rises to a preset threshold, the control center controls the electrical unit to work, so that the electric push rod (802) is extended, so that the fixed section (521) is connected to the wire (9), and then the shell is grounded for the second time, so that the current is discharged into the ground, reducing safety hazards; S3. After performing step S2, if the data measured by the temperature sensor (203) still increases, in order to eliminate the abnormality of the temperature sensor (203), the control center generates force data on the pull rope (72) synchronously, indicating that the temperature has indeed increased. At this time, the heat-sensitive bar (3) will show a phenomenon of unilateral aggregation, which can provide a visual prompt to the staff. The synchronous signal can be fed back to the alarm on the distribution box (1), causing the alarm to sound, prompting the staff to take corresponding measures in time, and at the same time controlling the relay to cut off the power supply to the distribution cabinet.

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