CN213902460U

CN213902460U - Wireless intelligent monitoring device of photovoltaic combiner box

Info

Publication number: CN213902460U
Application number: CN202023039972.1U
Authority: CN
Inventors: 王保华
Original assignee: Shenzhen Qianhai Weichuang Technology Co ltd
Current assignee: Shenzhen Qianhai Weichuang Technology Co ltd
Priority date: 2020-12-16
Filing date: 2020-12-16
Publication date: 2021-08-06
Anticipated expiration: 2030-12-16

Abstract

The utility model discloses a photovoltaic conflux case wireless intelligent monitoring device, include: the control circuit board is packaged in the shell; the shell is provided with a power interface used for being connected with a bus of an external battery board, one side face of the shell is provided with a sensor interface used for being connected with the Hall perforation sensor and a switching value input interface used for inputting switching value, the shell is also provided with an antenna interface used for being connected with an external antenna, and the power interface, the sensor interface, the switching value input interface and the antenna interface are all electrically connected with the control circuit board. Through antenna interface with wireless communication part with converge flow box data monitoring part and collect an organic whole, the structure is smaller and more exquisite, gets the electricity through the direct generating line that converges from outside panel of power source, and it is more convenient to supply power, and whole device can realize wireless data transmission through external antenna, need not to lay the cable, and the cost is lower.

Description

Wireless intelligent monitoring device of photovoltaic combiner box

Technical Field

The utility model relates to a photovoltaic conflux case information monitoring technical field, more specifically the wireless intelligent monitoring device of photovoltaic conflux case that says so relates to.

Background

At present, a solar photovoltaic combiner box is divided into a non-intelligent combiner box and an intelligent combiner box, the non-intelligent combiner box can only play a role in combining current, and the intelligent combiner box is added with current detection, bus voltage detection and communication functions of each photovoltaic group string branch on the basis of the original effect of combining current. The intelligent combiner box is an eye of a photovoltaic sub-array, can detect the current value, the voltage value, the temperature, the state of a lightning protector, the state of a circuit breaker and the like of all photovoltaic strings of a photovoltaic power station in real time, intelligently analyzes the current value and the voltage value, feeds back an over-temperature alarm, a string broken circuit alarm, a string overcurrent alarm, a string overvoltage alarm, a string current deviation alarm, component attenuation and the like to a monitoring system, can timely troubleshoot and process faults, and avoids fault amplification.

However, as the installation time of the photovoltaic combiner box gradually reaches the quality guarantee period, a large number of measurement and control units are damaged, communication is not available, no person sells the photovoltaic combiner box, spare parts cannot be bought and the like in the intelligent combiner box on the site of the photovoltaic power station, a lot of combiner box manufacturers disappear in photovoltaic shuffling, the situation that the manufacturers cannot be found by the manufacturers occurs, and later maintenance is difficult. And although the post maintenance of the non-intelligent combiner box is relatively convenient, the function is single, and the intelligent requirement is difficult to meet.

In order to solve the problem of intelligent management of an owner power station, a combiner box monitoring unit needs to be additionally arranged, a non-intelligent combiner box is changed into an intelligent combiner box, an RS485 communication interface is adopted for data transmission of the conventional combiner box monitoring unit, the condition of strong interference of a communication link exists in wired connection, and the cost of laying a wire cable is high. Need realize wireless collection and control, but the electric wire netting safety requires can't use public operation mobile business's wireless, so need supervisory equipment to use local wireless monitoring, converge case monitoring unit if need wireless transmission, need increase wireless equipment alone, can't merge collection case monitoring unit with the photovoltaic and combine together, wireless equipment power supply difficulty.

Therefore, how to provide a photovoltaic combiner box wireless intelligent monitoring device with lower cost and small structure is a problem that needs to be solved urgently by technical personnel in the field.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a wireless intelligent monitoring device of photovoltaic collection flow box has solved current collection flow box monitoring unit because of on-the-spot cable laying expense is high, communication effect is not good, the difficult scheduling problem of power supply.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a wireless intelligent monitoring device of photovoltaic collection flow box, the device includes: the control circuit board is packaged in the shell;

the external battery pack comprises a shell, and is characterized in that a power supply interface used for being connected with a bus of an external battery panel in a confluence mode is arranged on the shell, a sensor interface used for being connected with a Hall perforation sensor and a switching value input interface used for inputting switching values are arranged on one side face of the shell, an antenna interface used for being connected with an external antenna is further arranged on the shell, and the power supply interface, the sensor interface, the switching value input interface and the antenna interface are electrically connected with a control circuit board.

The utility model has the advantages that: through antenna interface with wireless communication part with converge flow box data monitoring part and collect an organic whole, the structure is smaller and more exquisite, gets the electricity through the direct generating line that converges from outside panel of power source, and it is more convenient to supply power, and whole device can realize wireless data transmission through external antenna, need not to lay the cable, and the cost is lower.

Further, still be equipped with temperature sensor in the shell, temperature sensor with the control scheme board is electric. Temperature sensor can detect the temperature information in the photovoltaic conflux case, and control circuit board can realize control, the early warning to the interior temperature of photovoltaic conflux case, avoids the interior high temperature of photovoltaic conflux case to influence inside device normal work, has also reduced because of the incident emergence that the overtemperature arouses, and the security improves greatly.

Furthermore, the shell is also provided with an infrared interface which is used for being in wireless connection with an external handheld terminal, and the infrared interface is electrically connected with the control circuit board. The infrared interface is used for communicating with an external infrared wireless handset, data obtained by the monitoring device are sent to the infrared wireless handset, the data are checked and set by workers, and the operation process is more convenient.

Furthermore, the control circuit board comprises an analog-to-digital converter, a controller and a voltage converter, wherein the input end of the analog-to-digital converter is electrically connected with the sensor interface and the switching value input interface, the output end of the analog-to-digital converter is electrically connected with the controller, the power supply interface is electrically connected with the voltage converter, and the controller is electrically connected with the antenna interface and the voltage converter.

Further, the input direct current voltage of the power interface is 200-1500V.

The traditional wireless equipment data transmission needs an alternating current power supply or a low-voltage direct current power supply to supply power independently, and only the direct current 200V to 1500V conversion direct current voltage exists in the photovoltaic combiner box, so that the wireless data transmission device in the market needs to be configured with a direct current power supply for supplying power to the wireless device, the cost is high, and some fault points are increased.

The utility model provides a wireless collection flow box intelligent monitoring device, insert panel through power source and converge busbar voltage and supply power, input range is direct current 200 to 1500V broad width voltage, become the low pressure DC power supply with the high voltage and for converging devices such as flow box monitoring host computer, wireless antenna and hall sensor and supplying power, the self-power problem of monitoring unit and wireless device has been solved, the cost is reduced, and the device volume reduces greatly, the position space in the photovoltaic collection flow box has been practiced thrift.

Drawings

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

Fig. 1 is a schematic view of an overall structure of a wireless intelligent monitoring device for a photovoltaic combiner box provided by the present invention;

fig. 2 is a schematic view of a front side structure of a wireless intelligent monitoring device of a photovoltaic combiner box in an embodiment of the present invention;

fig. 3 is a schematic diagram of an interface structure of an 8-way hall sensor in an embodiment of the present invention;

fig. 4 is a schematic diagram of an interface structure of a 12-way hall sensor in the embodiment of the present invention;

fig. 5 is a schematic diagram of an interface structure of a 16-way hall sensor in an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a handheld terminal according to an embodiment of the present invention;

fig. 7 is a schematic diagram of an electrical connection relationship between the control circuit board and other devices in the embodiment of the present invention.

Detailed Description

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

Referring to fig. 1, fig. 2 and fig. 7, the embodiment of the utility model discloses a wireless intelligent monitoring device of photovoltaic combiner box, include: the device comprises a shell 1 and a control circuit board 2 packaged in the shell 1;

be equipped with on shell 1 and be used for the power interface 3 who is connected with the generating line that outside panel converged, be equipped with the sensor interface 4 that is used for connecting hall perforation sensor and the switching value input interface 5 that is used for the input switching value on one side of shell 1, still be equipped with the antenna interface 6 that is used for connecting external antenna on shell 1, power interface 3, sensor interface 4, switching value input interface 5 and antenna interface 6 all are connected with control circuit board 2 electricity.

In this embodiment, the power interface is to take power from a bus where the battery panel is converged, so as to supply power to the intelligent monitoring device of the junction box and the wireless device, and the input voltage range is a wide range voltage of DC200-1500V, wherein the left-end interface is PV + positive input, and the right-end interface is PV-negative input.

Referring to fig. 2, in this embodiment, the sensor interface 4, the switching value input interface 5, and the antenna interface 6 are all disposed on the front side of the entire apparatus, and the switching value input interface 5 (i.e., the interfaces DI1, DI1, DI2, and DI2) is connected to the lightning protection device and the circuit breaker status signal, so as to implement the status monitoring and alarm functions of the lightning protection device and the circuit breaker.

The sensor interface 4 is connected with 8-path, 12-path, 16-path and other multi-path intelligent current sensors to realize current monitoring, and the current measuring and monitoring functions of up to 32 paths are realized by adopting single connection or cascade connection. Referring to fig. 3, 4 and 5, schematic diagrams of interface structures of 8-way hall sensors, 12-way hall sensors and 16-way hall sensors are shown respectively, the lower part in the diagrams shows the number of channels to be measured, 8 ways can measure the current of 8 channels, 12 ways can measure the current of 12 channels, 16 ways can measure the current of 16 channels, and arrows show the directions of the currents.

In this embodiment, three types of current sensors are mainly introduced, which are

hall perforation sensors

8, 12 and 16, and the three types of current sensors can be freely combined and cascaded to realize combined measurement of 32 of 20, 24 and 28, and the cascading interfaces are respectively located at the left and right sides, and the sensors can be connected with the sensor interface 4 (i.e., the interfaces V +, V-and A, B) of the photovoltaic combiner box intelligent monitoring device through the V +, V-and TX/A, RX/B interfaces at the left and right ends, so as to realize current data acquisition and device power supply.

Preferably, a temperature sensor 7 is further arranged in the housing 1, and the temperature sensor 7 is electrically connected with the control circuit board 2.

Through cascading interface connection on sensor interface 4 and the sensor, realize whole photovoltaic conflux case intelligent monitoring, realize monitoring devices host computer and hall sensor and wireless device's power supply to realize data acquisition such as voltage, each way electric current, box temperature, lightning protection device state, circuit breaker state, and connect wireless device through antenna interface 6 and convey data to in the long-range backstage monitored control system.

Antenna interface 6 and magnetism inhale antenna or glue stick antenna connection in this embodiment, realize all monitoring data of photovoltaic collection flow box and report to the police to be connected with wireless receiving arrangement and realize the network deployment certainly. In this embodiment, the default of the wireless device is LoRa, and the wireless device may also be a wireless device such as CDMA, GPRS, 4G, 5G, NB-IoT, which may be specifically selected according to actual situations in the field.

Preferably, the housing 1 is further provided with an infrared interface 8 for wirelessly connecting with an external handheld terminal 9, and the infrared interface 8 is electrically connected with the control circuit board 2.

In order to facilitate field installation operation, professional knowledge of field engineers is not needed, and the functions of data receiving, displaying and parameter setting can be realized only by aligning the infrared interface of the intelligent monitoring device of the photovoltaic combiner box through the handheld wireless infrared terminal, so that the functions of wireless configuration of the device, setting of the baud rate, address, alarm, wireless and the like of the data detection part of the device and data viewing are realized. The method can specifically set the baud rate, address, data format and other information of the monitoring device, and can also set the starting and closing states of the total alarm and each classified alarm of the monitoring device, including photovoltaic voltage overvoltage alarm, high temperature alarm of the temperature in the box, leakage current alarm (a leakage current sensor is selected), lightning protection device (external switching value input 1) alarm, circuit breaker (external switching value input 2) alarm, current deviation average value alarm and negative current alarm; wireless device channel parameters may also be set.

Referring to fig. 6, a schematic structural diagram of the handheld terminal 9 is shown, and a display screen of the handheld terminal can also be used for checking the serial communication address, the baud rate, the data format and the currents of 24 channels of the monitoring device, and checking information such as photovoltaic voltage, in-box temperature, leakage current, total current, average current, total power, average power and the like monitored by the monitoring device; checking the starting and closing states of 24 channels of the monitoring device; the states of the general alarm and each classified alarm of the monitoring device are checked, the states comprise photovoltaic voltage overvoltage alarm, high-temperature alarm of temperature in a box, leakage current alarm, lightning protection device (external switching value input 1) alarm, circuit breaker (external switching value input 2) alarm, current deviation average value alarm and negative current alarm, and the configuration information of the wireless device is checked.

Specifically, referring to fig. 7, the control circuit board 2 includes an analog-to-digital converter 21, a controller 22, and a voltage converter 23, an input end of the analog-to-digital converter 21 is electrically connected to the sensor interface 4 and the switching value input interface 5, an output end of the analog-to-digital converter 21 is electrically connected to the controller 22, the power interface 3 is electrically connected to the voltage converter 23, and the controller 22 is electrically connected to the antenna interface 6 and the voltage converter 23.

In this embodiment, the control circuit board 2 is further provided with a warning light unit, the warning light unit is electrically connected to the controller 22, the warning light unit is mainly used for warning the operation, fault alarm, data output, data reception, and other information of the device, correspondingly, the housing 1 of the device is provided with a warning light display window, and fig. 1 shows four warning light windows RUN, ALM, TX, and RX, which are used for warning the operation, fault alarm, data output, data reception, and other information.

To sum up, the embodiment of the utility model discloses a wireless intelligent monitoring device of photovoltaic conflux case compares with prior art, has following advantage:

1. the multi-channel sensor can be accessed through the sensor interface, the voltage, the current, the total current, the temperature, the power of each channel, the total power and other information of the photovoltaic combiner box can be measured simultaneously, the information of the state of the lightning arrester, the state of the circuit breaker and the like can be detected through the switching value input interface, and the data acquisition is more comprehensive;

2. the wireless data acquisition system can be connected with an external antenna through an antenna interface, realize the wireless transmission of data, receive and convert the data into RS485 or network signals, realize the integration of a data acquisition part and a wireless transmission part, directly get electricity from a bus bar of a cell panel combiner box in the combiner box and solve the problem of respective power supply;

3. the wireless ad hoc network function of LoRa can be realized, the data transmission ad hoc setting of the combiner box or the networking realization of data remote transmission are realized, the data safety and the bandwidth speed are ensured, no operator is relied on, the flow charge is not needed, and the operation and maintenance cost is lower;

4. realize long-range setting equipment parameter, through infrared interface and the interconnection of outside handheld terminal, can look over data on the spot, convenient operation, simple practices thrift the expense of laying cable, cost greatly reduced.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.

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

Claims

1. The utility model provides a wireless intelligent monitoring device of photovoltaic collection flow box which characterized in that includes: the device comprises a shell (1) and a control circuit board (2) packaged in the shell (1);

be equipped with on shell (1) and be used for being connected power source (3) with the generating line that outside panel converged, be equipped with on the side of shell (1) and be used for connecting sensor interface (4) of hall perforation sensor and be used for input switching value's switching value input interface (5), still be equipped with antenna interface (6) that are used for connecting external antenna on shell (1), power source (3) sensor interface (4) switching value input interface (5) with antenna interface (6) all with control scheme board (2) electricity is connected.

2. The photovoltaic combiner box wireless intelligent monitoring device according to claim 1, wherein a temperature sensor (7) is further arranged in the shell (1), and the temperature sensor (7) is electrically connected with the control circuit board (2).

3. The photovoltaic combiner box wireless intelligent monitoring device according to claim 1, wherein an infrared interface (8) for wireless connection with an external handheld terminal is further arranged on the housing (1), and the infrared interface (8) is electrically connected with the control circuit board (2).

4. The wireless intelligent monitoring device of the photovoltaic combiner box according to any one of claims 1-3, wherein the control circuit board (2) comprises an analog-to-digital converter (21), a controller (22) and a voltage converter (23), an input end of the analog-to-digital converter (21) is electrically connected with the sensor interface (4) and the switching value input interface (5), an output end of the analog-to-digital converter (21) is electrically connected with the controller (22), the power supply interface (3) is electrically connected with the voltage converter (23), and the controller (22) is electrically connected with the antenna interface (6) and the voltage converter (23).

5. The device as claimed in claim 1, wherein the input dc voltage of the power interface (3) is 200-1500V.