CN219717944U - Light stacking control system - Google Patents

Abstract

The utility model discloses a light stacking control system, which comprises: the system comprises at least one group of photovoltaic modules, at least one intelligent control box, a combiner box, an access box, a high-voltage direct-current system and a monitoring platform; wherein, any group of photovoltaic module includes: the photovoltaic panels and the power optimizers are connected in series at intervals to form groups; the input of arbitrary intelligent control case is connected with the output of at least a set of photovoltaic module, and the output of at least one intelligent control case is connected with the input of collection flow box, and the output of collection flow box is connected with the input of access case, and the output of access case is connected with high-voltage direct current system, and high-voltage direct current system is used for supplying power for direct current load, and at least one intelligent control case is used for uploading the signal to monitor platform. According to the light-overlapping control system, the light energy utilization rate can be improved without configuring an inverter, the photovoltaic power generation capacity is flexible to configure, the material and maintenance cost is low, the string generating capacity is large, and the system safety and reliability are high.

Description

Light stacking control system

Technical Field

The utility model relates to the field of communication power supply photovoltaic power generation, in particular to a light-overlapping control system.

Background

The existing photovoltaic is the grid-connected access mode of the inverter, the scheme converts the direct current after the photovoltaic panel light energy conversion into alternating current through the inverter DC/AC (direct current/alternating current) unit, and the alternating current is then converted into high-voltage direct current through the high-voltage direct current module AC/DC (alternating current/direct current) for the direct current load to use, the photovoltaic power generation is firstly conducted through the DC/AC inversion unit in a two-stage conversion mode, grid connection is conducted, and then the direct current voltage level required by the load is rectified to be the direct current load power supply, the scheme power supply is conducted through the two-stage conversion, the conversion efficiency loss of the distributed photovoltaic power generation system is large, and the material cost and the maintenance cost are high.

The existing photovoltaic is in a form of respectively connecting an inverter DC/AC unit and a DC/DC (direct current/direct current) module, wherein the alternating current converted by the inverter is directly used for an alternating current load after being connected with the power grid; the DC/DC module converts the direct current after photovoltaic panel light energy conversion into direct current required by a high-voltage direct current load, the direct current load and the alternating current load are respectively powered by a DC/DC conversion mode and a DC/AC inversion conversion mode, but the scheme is limited by the capacities of the inverter and the DC/DC conversion module, and the photovoltaic access capacity is inflexible.

In addition, in the scheme, the photovoltaic panels generate electricity through simple serial-parallel connection, a small amount of shielding of the photovoltaic panels can influence the electricity generation efficiency of the whole group string, and the light energy conversion efficiency is low; the traditional light stacking scheme combining commercial power and photovoltaic power generation is free of an intelligent management and control module, needs a large amount of manual maintenance, is high in maintenance cost, and cannot be switched off rapidly and safely when faults occur, so that safety and reliability are low.

Disclosure of Invention

The present utility model has been made in view of the above-mentioned problems, and provides a light stacking control system that overcomes or at least partially solves the above-mentioned problems.

The present utility model provides a light stacking control system, comprising: the system comprises at least one group of photovoltaic modules, at least one intelligent control box, a combiner box, an access box, a high-voltage direct-current system and a monitoring platform; wherein, any group of photovoltaic module includes: the photovoltaic panels and the power optimizers are connected in series at intervals to form groups;

the input of arbitrary intelligent control case is connected with the output of at least a set of photovoltaic module, and the output of at least one intelligent control case is connected with the input of collection flow box, and the output of collection flow box is connected with the input of access case, and the output of access case is connected with high-voltage direct current system, and high-voltage direct current system is used for supplying power for direct current load, and at least one intelligent control case is used for uploading the signal to monitor platform.

In an alternative embodiment, the number of photovoltaic panels and power optimizers in each group of photovoltaic modules is equal, and the number of photovoltaic panels and power optimizers in each group of photovoltaic modules in series is determined according to the voltage of the high voltage direct current system.

In an alternative embodiment, the power optimizer is a power optimizer with maximum power point tracking functionality.

In an alternative embodiment, the power optimizer has a bypass mode.

In an alternative embodiment, the power optimizer is configured to: and calculating the line loss voltage drop according to the transmission distance, so that the maximum output voltage value of the photovoltaic module minus the line loss voltage is higher than the setting voltage value of the high-voltage direct current system.

In an alternative embodiment, the intelligent control box comprises: the safety shutdown device comprises at least one safety shutdown plate, a bus bar corresponding to the safety shutdown plate, a first bus bar breaker, a total bus bar, a first lightning protection device, a first auxiliary power supply, an emergency stop button, an Internet of things monitoring plate and a fuse, wherein the bus bar corresponding to the safety shutdown plate is connected with the total bus bar through the first bus bar breaker, the total bus bar is connected with the first lightning protection device in parallel, and the total bus bar is connected to the first auxiliary power supply through the fuse.

In an alternative embodiment, the safety shutdown plate is provided with a plurality of terminals for each group of photovoltaic modules, and the terminals are used for monitoring whether the electric arc occurs in each group of photovoltaic modules in real time, and if the electric arc occurs in the photovoltaic modules, the power optimizer is closed to extinguish the arc; and

the safety shutdown board is provided with a plurality of communication interfaces, and the communication between the safety shutdown boards and uploading the monitoring information to the internet of things monitoring board are used for the communication between the safety shutdown boards.

In an alternative embodiment, the power optimizer of the photovoltaic module communicates with the safety shutdown panel of the intelligent control box using a power carrier.

In an alternative embodiment, the manifold includes: the device comprises a second bus breaker, a bus terminal bar, an anti-reflection diode, a second lightning protection device, an insulation and electric quantity control unit, a touch display screen and a second auxiliary power supply;

the second bus breaker is connected with the input end of the bus box and the bus terminal bar; the bus terminal is connected with the second lightning protection device, the insulation and electric quantity control unit; the anti-reverse diode is connected in series between the power supply lines of the secondary circuit and used for preventing current from flowing backwards; and the second auxiliary power supply is connected with the total converging terminal block and is used for supplying power to the converging box.

In an alternative embodiment, the output line of the second bus breaker is configured with a hall current sensor and a leakage current sensor, the output ends of the hall current sensor and the leakage current sensor are respectively connected to an insulation and electric quantity monitoring unit, the insulation and electric quantity monitoring unit is used for measuring the electric quantity of each bus branch and monitoring insulation faults, and the leakage current sensor is used for detecting the leakage current of each bus branch and uploading the leakage current to the insulation and electric quantity monitoring unit.

According to the light-overlapping control system, the light energy utilization rate can be improved without configuring an inverter, the photovoltaic power generation capacity is flexible to configure, the material and maintenance cost is low, the string generating capacity is large, and the system safety and reliability are high.

The foregoing description is only an overview of the present utility model, and is intended to be implemented in accordance with the teachings of the present utility model, as it is to be understood that the following detailed description of the utility model is intended to provide a better understanding of the present utility model, as it is presented herein, along with the foregoing and other objects, features and advantages of the utility model.

Drawings

Fig. 1 shows a schematic structural diagram of a light stacking control system provided according to an embodiment of the present utility model;

fig. 2 illustrates a schematic structural diagram of a photovoltaic module of the light stacking control system according to an embodiment of the present utility model;

fig. 3 shows an electrical connection diagram of an intelligent control box of the dimming control system according to an embodiment of the present utility model; and

fig. 4 shows an electrical connection diagram of a junction box of the light stacking control system provided according to an embodiment of the present utility model.

Reference numerals in the specific embodiments are as follows:

photovoltaic module 1 intelligent control case 2 collection flow box 3 access case 4 high voltage direct current system 5

DC load 6 monitoring platform 7

Photovoltaic panel 1-1 power optimizer 1-2

Negative input end 2-2 negative output end 2-3 of safety shut-off plate 2-1

Positive input end 2-4 positive output end 2-5 ground end 2-6

Bus fuse 2-7 negative bus bar 2-8 positive bus bar 2-9

First bus breaker 2-10 total negative bus bar 2-11 total positive bus bar 2-12

2-14 total positive output ends and 2-15 total negative output ends of the first lightning protection device 2-13

Auxiliary power supply fuse 2-16 first auxiliary power supply 2-17 safety shutdown plate fuse 2-18

Scram button 2-19 thing networking monitor plate 2-20

Second bus breaker 3-1 positive bus terminal bar 3-2 negative bus terminal bar 3-3

Hall current sensor 3-4 leakage current sensor 3-5 anti-reverse diode 3-6

Total positive bus terminal bar 3-7 total negative bus terminal bar 3-8 second lightning protection device 3-9

The touch display screen 3-10 is insulated and the electric quantity control unit 3-11 is a second auxiliary power supply 3-12

Detailed Description

Embodiments of the technical scheme of the present utility model will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present utility model, and thus are merely examples, and are not intended to limit the scope of the present utility model.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model; the terms "comprising" and "having" and any variations thereof in the description of the utility model and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion.

In the description of embodiments of the present utility model, the technical terms "first," "second," and the like are used merely to distinguish between different objects and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. In the description of the embodiments of the present utility model, the meaning of "plurality" is two or more unless explicitly defined otherwise.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the utility model. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

In the description of the embodiments of the present utility model, the term "and/or" is merely an association relationship describing an association object, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship. In the description of the embodiments of the present utility model, the term "plurality" means two or more (including two), and similarly, "plural sets" means two or more (including two), and "plural sheets" means two or more (including two).

In the description of the embodiments of the present utility model, the orientation or positional relationship indicated by the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of the present utility model.

In the description of the embodiments of the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like should be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; or may be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present utility model will be understood by those of ordinary skill in the art according to specific circumstances.

For a better understanding of the present utility model, the present utility model is described in detail below with reference to fig. 1 to 4.

Fig. 1 illustrates a schematic structure of a light stacking control system according to an embodiment of the present utility model. As shown in fig. 1, the superimposition control system includes: at least one group of photovoltaic modules 1, at least one intelligent control box 2, a combiner box 3, an access box 4, a high-voltage direct-current system 5 and a monitoring platform 7; wherein, any group of photovoltaic module 1 includes: the photovoltaic panels and the power optimizers are connected in series at intervals to form groups;

any intelligent control case 2's input is connected with the output of at least a set of photovoltaic module 1, the output of at least one intelligent control case 2 is connected with the input of collection flow box 3, the output of collection flow box 3 is connected with the input of access case 4, the output of access case 4 is connected with high voltage direct current system 5, high voltage direct current system (i.e. high voltage direct current system busbar) 5 is used for supplying power for direct current load 6, at least one intelligent control case 2 is used for uploading the signal to monitor platform 7, monitor platform 7 can monitor each part of folding light control system in real time, the electric quantity of each part of accurate measurement.

Fig. 2 shows a schematic structural diagram of a photovoltaic module 1 of a light stacking control system according to an embodiment of the present utility model, as shown in fig. 2, the photovoltaic modules 1 are connected in series with each other at intervals by photovoltaic panels 1-1 and power optimizers 1-2, the number of the photovoltaic panels 1-1 in each group of the photovoltaic modules 1 is equal to the number of the power optimizers 1-2, and the number of the photovoltaic panels 1-1 and the power optimizers 1-2 connected in series in each group of the photovoltaic modules 1 is determined according to the voltage of the high voltage direct current system 5.

Fig. 3 shows an electrical connection diagram of an intelligent control box of the light stacking control system according to an embodiment of the present utility model, and as shown in fig. 3, the intelligent control box 2 includes: at least one safety shutdown board 2-1, a busbar corresponding to the safety shutdown board (including a positive busbar 2-9 and a negative busbar 2-8), a ground terminal 2-6, a first busbar breaker 2-10, a total busbar (including a total positive busbar 2-12 and a total negative busbar 2-11), a first lightning arrester 2-13, a total positive output terminal 2-14, a total negative output terminal 2-15, a first auxiliary power source 2-17, a scram button 2-19, an internet of things monitoring board 2-20 and a plurality of fuses, wherein the busbar corresponding to the safety shutdown board 2-1 is connected with the total busbar through the first busbar breaker 2-10, and the total busbar is connected with the first lightning arrester 2-13 in parallel, and is connected to the first auxiliary power source 2-17 through the fuses.

As shown in fig. 3, the safety shutdown plate 2-1 is provided with a plurality of terminals for each group of photovoltaic modules 1, the plurality of terminals including a positive input end 2-4, a negative input end 2-2, a positive output end 2-5, and a negative output end 2-3, the number of the positive input ends 2-4 being equal to the number of the positive output ends 2-5, and the number of the negative input ends 2-2 being equal to the number of the negative output ends 2-3. The negative output end 2-3 of the safety shut-off plate 2-1 is connected with the negative bus bar 2-8, the positive output end 2-5 is connected with the positive bus bar 2-9 after passing through the bus fuse 2-7, and the positive bus bar 2-5 and the negative bus bar 2-3 are respectively connected with the total positive bus bar 2-12 and the total negative bus bar 2-11 through the first bus breaker 2-10. The total positive bus bar 2-12 and the total negative bus bar 2-11 are connected with the first lightning protection device 2-13 in parallel, and the first lightning protection device 2-13 can carry out surge protection on each component in the intelligent control box 2.

In this embodiment, the intelligent control box 2 is configured with a string busbar fuse (which may also be referred to as an output fuse) 2-7, an auxiliary power fuse 2-16, a safety shutdown board power fuse 2-18, and a string busbar breaker (a first busbar breaker) 2-10, so that the intelligent control box 2 of this embodiment is provided with a multiple overcurrent protection device, and when an overcurrent and a short-circuit fault occur in a line of a busbar string, the circuit can be broken in time, thereby effectively shortening the time for processing the fault of the light-overlapping control system.

The total positive bus bar 2-12 and the total negative bus bar 2-11 of the intelligent control box 2 are connected in parallel with the first lightning protection device 2-13, and the maximum discharge current is set, so that the damage of surge impact to all components in the intelligent control box 2 can be effectively prevented; the total positive bus bar 2-12 and the total negative bus bar 2-11 are connected with the first auxiliary power source 2-17 through the auxiliary power source fuse 2-16, the high-voltage direct current is converted into a power source with a preset voltage through DC/DC (the voltage of the power source converted in the embodiment is 12V), the power source with the preset voltage supplies power to the safety shutdown board 2-1 through the safety shutdown board fuse 2-18 and the emergency shutdown button 2-19, in the embodiment, the safety shutdown board fuse 2-18 adopts a quick-pulling type base, and the first auxiliary power source 2-17 can be safely and conveniently maintained and replaced under the condition that the whole light-folding control system is not powered off.

In this embodiment, each safety shutdown plate 2-1 is equipped with a corresponding emergency shutdown button 2-19, and when a certain safety shutdown plate 2-1 needs maintenance, the emergency shutdown button 2-19 of the corresponding safety shutdown plate 2-1 can be disconnected on the machine box door for maintenance, so that the normal work of other safety shutdown plates is not affected.

Preferably, the safety shutdown plate 2-1 can be used for monitoring whether an arc appears in each path of photovoltaic module 1 in real time, if the arc appears in the photovoltaic module 1, the power optimizer 1-2 is closed to extinguish the arc, after the arc is protected for a preset time (for example, 5 minutes), the system resumes normal output, if the arc is extinguished and protected for a preset number of times (for example, 5 times of arc extinction occurs for 24 hours) in a preset time period, the system always keeps a protection state, and the safety shutdown plate 2-1 needs to be powered down manually and then powered up again for recovery.

The safety shutdown plate 2-1 can detect the current and the port voltage of each photovoltaic module 1 connected to each group and measure the electric quantity of each photovoltaic module group string; meanwhile, the safety shutdown board 2-1 can communicate with the power optimizer 1-2 through a carrier wave, and the signals 0 and 1 can be sent by changing the frequency of the carrier wave on a power line without separately configuring a communication cable. The safety shutdown board 2-1 collects the output voltage of each power optimizer 1-2 to measure the generated energy of each photovoltaic panel 1-1 so as to achieve the purpose of accurate positioning and measurement in the aspect of electric quantity management.

The safety shutdown board 2-1 is provided with a plurality of communication interfaces, and the plurality of communication interfaces are used for communication between the safety shutdown boards 2-1 and uploading monitoring information to the internet of things monitoring board 2-20.

The intelligent control box 2 controls the array of each path of photovoltaic modules 1 according to the power of the direct current load 6. If the direct current load 6 requires the balance of the output shunt power, the safety shutdown board 2-1 in the intelligent control box 2 can control the output power of each path according to the power condition, and the load power is equally divided.

The intelligent control box of the light stacking control system of the embodiment can obviously increase the reliability of the system by arranging a multi-stage protection device (such as a first lightning protection device and a fuse), ensures that other parts can not be influenced to work normally when any part is damaged, ensures that the damaged part can safely and quickly exit from operation, ensures normal operation of a direct current load, and can be replaced conveniently and rapidly.

Fig. 4 shows an electrical connection diagram of a junction box of the light-folding control system provided according to an embodiment of the present utility model, and as shown in fig. 4, the junction box 3 includes a second junction breaker 3-1, junction terminal bars (positive junction terminal bar 3-2 and negative junction terminal bar 3-3), junction terminal bars (total positive junction terminal bar 3-7 and total negative junction terminal bar 3-8), anti-reflection diodes 3-6, a second lightning arrester 3-9, an insulation and power control unit 3-11, a touch display screen 3-10, and a second auxiliary power supply 3-12, wherein the second junction breaker 3-1 is connected with an input end of the junction box 3, the junction terminal bars; the bus terminal bar is connected with the second lightning protection device 3-9 and the insulation and electric quantity control unit 3-11; the anti-reverse diode 3-6 is connected in series between the power supply lines of the secondary circuit and is used for preventing current from flowing backwards; and a second auxiliary power supply 3-12 connected to the bus bar for supplying power to the bus box 3.

After the input interface of the bus box 3 passes through the second bus breaker 3-1, the output is respectively connected to the total positive bus terminal bar 3-7 and the total negative bus terminal bar 3-8, and the insulation and electric quantity monitoring unit 3-11 is connected with the touch display screen 3-10 and is connected with the internet of things monitoring board 2-20 of the intelligent control box 2.

The input of the access box 4 is connected with the output of the combiner box 3, the output of the access box 4 is connected with the spare battery fuse wire end of the high-voltage direct-current system 5, and the access box 4 is provided with a circuit breaker and a lightning protector for carrying out safety protection on all parts of the access box 4.

The monitoring platform 7 is used for monitoring the generated energy of each photovoltaic module 1 in real time, monitoring each component in the light stacking control system in real time, and accurately measuring the electric quantity in the true system, and carrying out data analysis on generated energy and big data so as to quickly position the photovoltaic modules with dust accumulation, shielding and faults and realize intelligent operation and maintenance.

In some alternative embodiments, the power optimizer 1-2 is a power optimizer 1-2 with a maximum power point tracking function, and the power optimizer 1-2 can continuously track the maximum power point of the photovoltaic panel 1-1, automatically operate in a step-up, step-down or pass-through state according to the photovoltaic panel power, the string end voltage and the string current, and adjust the input and output voltages so that the photovoltaic panel 1-1 operates at the maximum power point. When the string current is greater than the MPP current, the power optimizer 1-2 works in a boosting state; when the string current is less than the MPP current, the power optimizer 1-2 works in a step-down state; when the dc load 6 is idling, the power optimizer 1-2 operates in a pass-through state. Because the power optimizer 1-2 has the maximum power point tracking function, both the shielded photovoltaic panel and the non-shielded photovoltaic panel can output at the maximum power, and the generated energy of the light-overlapping control system is improved. Preferably, the input voltage range of the power optimizer 1-2 is adjustable, and more preferably, the adjustable range of the input voltage of the power optimizer 1-2 is 8-60V.

In some alternative embodiments, the power optimizer 1-2 may communicate in real time with the intelligent control box 2, and the intelligent control box 2 follows the hvdc system 5 voltage to control the generated power of the photovoltaic assembly 1. The power optimizer 1-2 is for: and calculating the line loss voltage drop according to the transmission distance so that the maximum output voltage value of the photovoltaic module 1 minus the line loss voltage is higher than the setting voltage value of the high-voltage direct current system 5.

Specifically, when the output voltage of the photovoltaic module 1 is higher than the voltage of the high-voltage direct-current system 5 by default and the photovoltaic power generation power is lower than the power of the direct-current load 6, the default output voltage of the photovoltaic module 1 cannot be maintained due to insufficient output power of the photovoltaic module 1, and the power optimizer 1-2 gradually reduces the output voltage until the output voltage of the photovoltaic module 1 is equal to the voltage of the high-voltage direct-current system 5, so that the output voltage and the high-voltage direct-current system 5 share the power of the direct-current load 6; when the generated power of the photovoltaic panel 1-1 is greater than or equal to the power of the direct current load 6, the power optimizer 1-2 calculates the line loss voltage drop according to the transmission distance, ensures that the set maximum output voltage value of the photovoltaic module 1 minus the line loss voltage drop loss is higher than the set voltage value of the high-voltage direct current system 5 (namely, the floating charging voltage value of the battery connected with the high-voltage direct current system 5 is lower than the battery charging voltage value), and the power optimizer 1-2 can effectively avoid the problem of overcharging damage of the battery by limiting the maximum output voltage.

In some alternative embodiments, the photovoltaic modules 1 are independent of each other, and current sharing and voltage stabilizing adjustment are not performed among the photovoltaic modules 1. The output voltage of each photovoltaic module 1 can follow and overlap the voltage of the high-voltage direct-current system 5 in real time according to the power of the direct-current load 6, so that the output voltage of each photovoltaic module 1 can be gradually adjusted to the voltage value of the high-voltage direct-current system 5 until the voltage of all the photovoltaic modules 1 is equal to the voltage of the high-voltage direct-current system 5. The photovoltaic module of the embodiment adopts the passive and concise dynamic voltage stabilizing working mode, so that when the light folding control system is on site, the maximum output voltage value of the power optimizers 1-2 in each group string accessed by the safety shutdown plate 2-1 is only required to be set in a mode of the monitoring platform 7 or the Bluetooth APP.

In some alternative embodiments, the power optimizers 1-2 are provided with bypass modes, and when one of the power optimizers 1-2 fails and cannot normally output, the bypass function of the power optimizers 1-2 can ensure that the failed power optimizer 1-2 does not influence the normal output of the other power optimizers 1-2 when the photovoltaic module 1 is operated.

In some alternative embodiments, the output line of the second bus breaker 3-1 is configured with a hall current sensor 3-4 and a leakage current sensor 3-5, the output ends of the hall current sensor 3-4 and the leakage current sensor 3-5 are respectively connected to an insulation and electricity monitoring unit 3-11, the insulation and electricity monitoring unit 3-11 is used for measuring the electricity quantity and monitoring the insulation fault of each bus branch, and the leakage current sensor 3-5 is used for detecting the leakage current of each bus branch and uploading the leakage current to the insulation and electricity monitoring unit 3-1. The electric quantity and insulation fault information monitored by the insulation and electric quantity monitoring unit 3-11 can be uploaded to the touch display screen 3-10 and transmitted back to the Internet of things monitoring board 2-20 of the intelligent control box 2, the touch display screen 3-10 is used for locally checking the monitoring information uploaded by the insulation and electric quantity monitoring unit, and the Internet of things monitoring board 2-20 is used for uploading the monitoring information to the monitoring platform 7.

The secondary side of the leakage current sensor 3-4 is connected to the insulation and electric quantity monitoring unit 3-11, the insulation and electric quantity monitoring unit 3-11 is respectively connected with the internet of things monitoring board 2-20 and the touch display screen 3-10 through a communication interface, and when the leakage current value exceeds a threshold value, the monitoring platform 7 and the touch display screen 3-10 receive insulation fault state feedback and simultaneously output audible and visual alarm signals.

According to the light stacking control system provided by the embodiment, the light energy utilization rate can be improved without configuring an inverter; the photovoltaic power generation capacity is flexibly configured, the material and maintenance cost is low, the photovoltaic is directly connected into the high-voltage direct current system after passing through the power optimizer, the safety shutdown plate and the multi-stage overcurrent and short-circuit protection device, the photovoltaic access capacity can be flexibly configured by adjusting the number of each component, the types of stock materials are reduced, the on-site on-demand configuration is facilitated, and the material cost and the maintenance cost are integrally reduced; the photovoltaic module group string generating capacity of the light-overlapping control system is large, the power optimizer enables the shielded photovoltaic module and the non-shielded photovoltaic module to output at the maximum power, the shielding photovoltaic module is prevented from affecting the normal photovoltaic module, and the generating capacity of the whole string of modules is improved; the safety shutdown plate is used for intelligent optimization, monitoring and safety shutdown of the string photovoltaic, and can realize the maximum power point tracking of the component level, the monitoring of the component level, the quick shutdown of the component level, the string direct current arc extinction and the string overvoltage protection, and the safety and the reliability of the photovoltaic access system can be greatly improved.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model, and are intended to be included within the scope of the appended claims and description. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present utility model is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims (10)

1. A light overlay control system, the system comprising: the system comprises at least one group of photovoltaic modules, at least one intelligent control box, a combiner box, an access box, a high-voltage direct-current system and a monitoring platform; wherein, any group of photovoltaic module includes: the photovoltaic panels and the power optimizers are connected in series at intervals to form groups;

any intelligent control case's input is connected with the output of at least a set of photovoltaic module, at least one intelligent control case's output with the input of collection flow box is connected, the output of collection flow box with the input of access case is connected, the output of access case with high voltage direct current system is connected, high voltage direct current system is used for supplying power for direct current load, at least one intelligent control case is used for uploading the signal to monitor platform.

2. The system of claim 1, wherein the number of photovoltaic panels and power optimizers in each set of photovoltaic modules is equal, the number of photovoltaic panels and power optimizers in each set of photovoltaic modules in series being determined based on the voltage of the high voltage direct current system.

3. The system of claim 2, wherein the power optimizer is a power optimizer with a maximum power point tracking function.

4. A system according to claim 2 or 3, wherein the power optimizer has a bypass mode.

5. The system according to claim 1 or 2, wherein the power optimizer is configured to: and calculating the line loss voltage drop according to the transmission distance, so that the maximum output voltage value of the photovoltaic module minus the line loss voltage is higher than the setting voltage value of the high-voltage direct current system.

6. The system of claim 1 or 2, wherein the intelligent control box comprises: at least one safety shut-off board, with busbar, first busbar circuit breaker, total busbar, first lightning protection device, first auxiliary power supply, scram button, thing networking monitor plate and fuse that the safety shut-off board corresponds, wherein, with the busbar that the safety shut-off board corresponds through first busbar circuit breaker with the total busbar is connected, and the total busbar with first lightning protection device connects in parallel, the total busbar passes through the fuse is connected to first auxiliary power supply.

7. The system of claim 6, wherein the safety shutdown plate is provided with a plurality of terminals for each group of photovoltaic modules, and the terminals are used for monitoring whether the electric arc occurs in each group of photovoltaic modules in real time, and if the electric arc occurs in the photovoltaic modules, arc extinction is performed by closing the power optimizer; and

the safety shutdown board is provided with a plurality of communication interfaces, and the communication interfaces are used for communication between the safety shutdown boards and uploading monitoring information to the internet of things monitoring board.

8. The system of claim 6, wherein the power optimizer of the photovoltaic module communicates with the safety shutdown panel of the intelligent control box using a power carrier.

9. The system of claim 1, wherein the combiner box comprises: the device comprises a second bus breaker, a bus terminal bar, an anti-reflection diode, a second lightning protection device, an insulation and electric quantity control unit, a touch display screen and a second auxiliary power supply;

the second bus breaker is connected with the input end of the bus box and the bus terminal bar; the bus terminal is connected with the second lightning protection device, the insulation and electric quantity control unit; the anti-reverse diode is connected in series between the power supply lines of the secondary circuit and used for preventing current from flowing backwards; and the second auxiliary power supply is connected with the total converging terminal strip and is used for supplying power to the converging box.

10. The system according to claim 9, wherein the output line of the second bus breaker is configured with a hall current sensor and a leakage current sensor, and output ends of the hall current sensor and the leakage current sensor are respectively connected to the insulation and power monitoring unit, the insulation and power monitoring unit is used for measuring power and monitoring insulation faults of each bus branch, and the leakage current sensor is used for detecting leakage current of each bus branch and uploading the leakage current to the insulation and power monitoring unit.