Line concentration adapter and data collection device

Abstract

The utility model discloses a line concentration adapter and a data collection device, and relates to the field of data collection, the line concentration adapter comprises an input communication unit, N resistors, a control module and a first output communication unit, and after the data is transmitted to the control module, the control module transmits the data to the first output communication unit, so that the first output communication unit outputs the data to the data acquisition device. Therefore, the data of the corresponding inverters are received by using the input ends of the input communication unit, and then the data are output to the data acquisition device from the first output communication unit after passing through the control module, so that the data acquisition device can receive the data, and the data loss of multiple inverters caused by the fault of one inverter is avoided; and the accuracy and integrity of data collection are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to data collection field, especially a kind of concentrator and data collection device. BACKGROUND

[0002] Currently, the user of distributed photovoltaic power station usually uploads the data of inverter to own data background for data collection, and the inverter is connected to data uploading device by 485 line in general, and then uploaded to data background, since the 485 communication unit of data uploading device is limited, generally 1-way or 2-way, the inverter field is connected to data uploading device by 485 line in the form of 1-way or 2-way, and then uploaded to data background, but in this communication mode, if one inverter fails, it will cause the data loss of multiple inverters, and reduce the accuracy and integrity of data collection. SUMMARY

[0003] The utility model discloses a kind of concentrator and data collection device, the data of each inverter can be connected to the input communication unit of concentrator corresponding input end, if one inverter fails, the data of other inverter without failure can still be uploaded to data acquisition device, avoid the data loss of multiple inverters caused by one inverter failure, improve the accuracy and integrity of data collection.

[0004] To solve the above technical problems, the utility model provides a kind of concentrator, comprising:

[0005] Input communication unit, the input communication unit includes multiple inputs, each input is connected with corresponding inverter, the output end of the input communication unit is connected with the first end of N resistors, for receiving the data of each inverter;

[0006] N the second end of the resistor is connected with the first end of control module, for balancing the ground potential difference of each inverter;

[0007] The control module, the second end of the control module is connected with the input end of first output communication unit, for obtaining the data, and the data is transmitted to the first output communication unit;

[0008] The first output communication unit, output end is connected with data acquisition device, for outputting the data to the data acquisition device.

[0009] Optionally, further comprising:

[0010] A first protocol conversion module, an input end of the first protocol conversion module is connected with the control module, an output end is connected with an input end of the four reserving communication unit, and the first protocol conversion module is used for converting a communication protocol of the data from a communication protocol of the input communication unit to a communication protocol of the four reserving communication unit, so that the data can be output to the power grid through the four reserving communication unit.

[0011] The four reserving communication unit, an output end of the four reserving communication unit is connected with the power grid, and a communication protocol of the four reserving communication unit is determined by the power grid.

[0012] Optionally, the system further comprises:

[0013] A second protocol conversion module, an input end of the second protocol conversion module is connected with the control module, and an output end is connected with a second output communication unit, and the second protocol conversion module is used for converting a communication protocol of the data from a communication protocol of the input communication unit to a communication protocol of the second output communication unit, so that the data can be output through the second output communication unit.

[0014] The second output communication unit, the second output communication unit is connected with the second protocol conversion module.

[0015] Optionally, the second output communication unit is a 4G communication unit / HPLC communication unit.

[0016] Optionally, the system further comprises:

[0017] A power module, an input end of the power module is connected with alternating current, and an output end is connected with the control module, and the power module is used for step-down and rectification on the alternating current, so as to provide direct current for the control module.

[0018] Optionally, the input communication unit comprises five input ends.

[0019] Optionally, the input communication unit comprises six input ends.

[0020] Optionally, the control module comprises:

[0021] A first resistor, a first end of the first resistor is connected with direct current, and a second end is connected with a first end of a second resistor;

[0022] The second resistor, a second end of the second resistor is connected with second ends of N resistors;

[0023] A first triode, a base of the first triode is connected with a common end of the first resistor and the second resistor, an emitter is connected with a first end of a third resistor, and a collector is connected with a first end of the first resistor;

[0024] The second end of the third resistor is connected with the second end of the fourth resistor;

[0025] The second end of the fourth resistor is connected with the second end of the second resistor, and the common end after connection is grounded;

[0026] The first end of the fifth resistor is connected with the common end of the first end of the first resistor and the collector of the first triode, the second end is connected with the collector of the second triode, and the common end after connection is connected with the input end of the first output communication unit;

[0027] The base of the second triode is connected with the common end of the third resistor and the fourth resistor, and the emitter is connected with the common end of the second resistor and the fourth resistor.

[0028] Optionally, the control module further comprises:

[0029] The input end of the optical coupler is connected with the second end of the N resistors, and the output end is connected with the common end of the second resistor and the fourth resistor, for electric-optical-electric conversion of the data.

[0030] The utility model also provides a data collection device, including data acquisition device and as above-mentioned concentrator adapter, data acquisition device and concentrator adapter are connected.

[0031] The application provides a concentrator adapter and a data collection device, the concentrator adapter comprises an input communication unit, N resistors, a control module and a first output communication unit, wherein each input end of the input communication unit receives data of each inverter, and the ground potential difference of each inverter is balanced by using the corresponding resistor, after data transmission to the control module, the control module transmits data to the first output communication unit, so that the first output communication unit outputs data to the data acquisition device. It can be seen that the application receives data of corresponding inverters by each input end of the input communication unit of the concentrator adapter, and then outputs data of each inverter from the first output communication unit to the data acquisition device through the control module, so that the data acquisition device receives data of each inverter, if one inverter fails, the data of other inverters without failure can still be uploaded to the data acquisition device, avoiding the loss of data of multiple inverters caused by the failure of one inverter, and improving the accuracy and integrity of data collection. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the drawings needed to be used in the prior art and the embodiments will be briefly introduced as follows, obviously, the drawings described in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0033] Figure 1 A structure schematic diagram of the concentrator adapter is provided in the present application.

[0034] Figure 2 A structure schematic diagram of the concentrator adapter is provided in the present application.

[0035] Figure 3 A structure schematic diagram of the control module is provided in the present application. DETAILED DESCRIPTION

[0036] The core of the present application is to provide a concentrator adapter and a data collection device, which can connect the data of each inverter with the input end of the input communication unit of the concentrator adapter, if one inverter fails, the data of other inverter which does not fail can still be uploaded to the data acquisition device, avoiding the loss of data of multiple inverters caused by the failure of one inverter, and improving the accuracy and integrity of data collection.

[0037] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application, obviously, the described embodiments are only some embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0038] At present, the user who adopts the distributed photovoltaic power station usually uploads the data of the inverter to the data background of his own for data collection, and the inverter is connected to the data uploading device by 485 line in the conventional way, and then uploaded to the data background, since the 485 communication unit of the data uploading device is limited, generally one or two, the inverter field is connected to the data uploading device in the form of one or two 485 lines in series, and then uploaded to the data background, but in this communication mode, if one inverter fails, the data of multiple inverters will be lost, which reduces the accuracy and integrity of data collection.

[0039] In order to solve the above technical problems, the present application provides a concentrator adapter.

[0040] Specifically, please refer to Figure 1As shown, Figure 1 The utility model provides a kind of concentrator's structural diagram.

[0041] The concentrator includes:

[0042] The input communication unit 1 includes multiple input terminals, each input terminal is connected with a corresponding inverter, and the output terminal of the input communication unit 1 is connected with the first end of the N resistors 2, for receiving the data of each inverter.

[0043] The N resistors 2 are connected with the first end of the control module 3 at the second end, for balancing the ground potential difference of each inverter.

[0044] The control module 3 is connected with the input terminal of the first output communication unit SC1 at the second end, for obtaining data and transmitting the data to the first output communication unit SC1.

[0045] The first output communication unit SC1 is connected with the data acquisition device at the output terminal, for outputting data to the data acquisition device.

[0046] The concentrator includes the input communication unit 1, the N resistors 2, the control module 3 and the first output communication unit SC1. It should be noted that the inverter is usually connected with the data upload device through the 485 line, and then the data is uploaded to the data acquisition device in the data background through the data upload device. Then the data acquisition device processes the data of all inverters for subsequent operation and management.

[0047] In this embodiment, one inverter is connected with one input terminal of the input communication unit 1 of the concentrator, realizing one-to-one data transmission between the inverter and the input communication unit 1 of the concentrator. The inverter transmits data to the input communication unit 1 of the concentrator through the 485 line. The concentrator is a 485 line convergence station for the inverter. The concentrator converges the data of all inverters to one path, and then outputs the data from the first output communication unit SC1 to the data acquisition module. It ensures that each inverter communicates with the concentrator in a single path. If one inverter fails, the data of other inverters without failure can still be uploaded to the data acquisition device.

[0048] In the embodiment, the N resistors 2 include five resistors R1, R2, R3, R4 and R5, the input end of the input communication unit 1 of the hub adapter can be five or six, if the number of inverters is greater than the number of input ends of the input communication unit 1 of the hub adapter, a plurality of hub adapters can be used, all inverters can be connected to the hub adapters, the input communication unit 1 of the hub adapter includes M input communication interfaces, M corresponds to the number of input ends of the input communication unit of the hub adapter, the communication protocol of the data of the inverter is RS-485 communication protocol, the input communication interface is an RS-485 input communication interface, RS-485 communication can transmit the data of the inverter at a long distance, and the communication protocol of the data of the inverter is consistent with the communication protocol of the input communication unit 1.

[0049] Further, N resistors are arranged between the input end of the input communication unit 1 and the control module 3 on the input side of the hub adapter, the reflection and interference in data transmission by using the RS-485 communication protocol are reduced by the N resistors, wherein the resistance of the N resistors is determined by the distance of each inverter, if the distance of the inverter is relatively far, the current of the corresponding inverter is relatively small, and the resistance is correspondingly set to be small; if the distance of the inverter is relatively close, the current of the corresponding inverter is relatively large, and the resistance is correspondingly set to be large, the ground potential difference is stabilized to the same level by using the resistors, and the interference on the transmitted data is reduced.

[0050] It can be seen that the input end of the input communication unit 1 of the hub adapter receives the data of the corresponding inverter, and then the data of each inverter is output to the data acquisition device from the first output communication unit SC1 through the control module 3, so that the data acquisition device receives the data of each inverter, if one inverter fails, the data of other inverters without failure can still be uploaded to the data acquisition device, avoiding that the data of multiple inverters is lost due to the failure of one inverter, and improving the accuracy and integrity of data collection.

[0051] On the basis of the above embodiment:

[0052] Specifically, refer to Figure 2 as shown in Figure 2 a specific structure diagram of the hub adapter.

[0053] As an optional embodiment, further comprising:

[0054] The first protocol conversion module is connected with the control module 3 at the input end and connected with the input end of the four reserved communication units at the output end, and is used for converting the communication protocol of the data from the communication protocol of the input communication unit 1 to the communication protocol of the four reserved communication units, so that the data can be output to the power grid through the four reserved communication units.

[0055] The four-reservable communication unit is connected with the power grid at its output end, and the communication protocol of the four-reservable communication unit is determined by the power grid.

[0056] Specifically, the current inverter only has one 485 communication interface, and cannot make communication reservation for future four-reservable requirements. The four-reservable requirements are the functional requirements of observability, measurability, adjustability and controllability of the substation. If the four-reservable requirements are to be met, the equipment needs to be modified or increased. Therefore, the first protocol conversion module and the four-reservable communication unit are arranged in the embodiment. When the power grid needs to collect the data of the inverter, the first protocol conversion module converts the communication protocol of the data of the inverter from the communication protocol of the input communication unit 1 to the communication protocol of the four-reservable communication unit, so that the data can be output to the power grid through the four-reservable communication unit. For example, if the power grid needs data of the TL 698.45 communication protocol, the communication protocol of the data of the inverter is the RS-485 communication protocol, and the first protocol conversion module converts the RS-485 communication protocol of the data of the inverter to the TL 698.45 communication protocol from the four-reservable communication unit, so that the data of the inverter can be transmitted to the power grid.

[0057] It can be seen that the first protocol conversion module and the four-reservable communication unit are arranged in the embodiment. When the power grid needs to collect the data of the inverter, the communication protocol of the data of the inverter is converted to the communication protocol required by the power grid in the transmission process of the data of the inverter, so that the power grid can collect the data of the inverter and meet the needs of future development of the power grid.

[0058] As an optional embodiment, the method further comprises:

[0059] The second protocol conversion module is connected with the control module 3 at its input end and connected with the second output communication unit at its output end, and is used for converting the communication protocol of the data from the communication protocol of the input communication unit 1 to the communication protocol of the second output communication unit, so that the data can be output through the second output communication unit.

[0060] The second output communication unit is connected with the second protocol conversion module.

[0061] In order to meet different communication needs, the second protocol conversion module and the second output communication unit are arranged in the embodiment. The second protocol conversion module can convert the communication protocol of the data to the communication protocol required by the actual demand, and then output from the second output communication unit. The second output communication unit is a second output communication interface corresponding to the communication protocol required by the actual demand. The first protocol conversion module and the second protocol conversion module can be one protocol conversion module 4.

[0062] It can be seen that the second protocol conversion module and the second output communication unit are arranged, data of the inverter can be output to the data acquisition device, the communication protocol of the data can be converted into the actual required communication protocol according to requirements, and the second output communication unit is output, so that the requirements of various communication protocols are met.

[0063] As an optional embodiment, the second output communication unit is a 4G communication unit / HPLC communication unit.

[0064] Specifically, the communication protocol of the data of the inverter is an RS-485 communication protocol, if the second output communication unit is a 4G communication unit, the second protocol conversion module converts the RS-485 communication protocol of the data into a 4G communication protocol corresponding to the 4G communication unit, and then outputs from the 4G communication unit; if the second output communication unit is an HPLC communication unit, the second protocol conversion module converts the RS-485 communication protocol of the data into an HPLC communication protocol corresponding to the HPLC communication unit, and then outputs from the HPLC communication unit.

[0065] It can be seen that if the second output communication unit is a 4G communication unit, the second protocol conversion module converts the RS-485 communication protocol of the data into a 4G communication protocol corresponding to the 4G communication unit and outputs from the 4G communication unit; if the second output communication unit is an HPLC communication unit, the second protocol conversion module converts the RS-485 communication protocol of the data into an HPLC communication protocol corresponding to the HPLC communication unit and outputs from the HPLC communication unit, so that the requirements of different communication protocols are met.

[0066] As an optional embodiment, the utility model also includes:

[0067] The input end of the power module 5 is connected to the alternating current, and the output end is connected to the control module 3, which is used for voltage reduction and rectification of the alternating current to provide direct current for the control module 3.

[0068] Specifically, because the control module 3 needs stable power supply to ensure its normal operation, and the control module 3 usually uses 24V direct current, and the power grid is generally 220V alternating current. Therefore, the 220V alternating current needs to be voltage reduced and rectified by the power module 5 to convert into 24V direct current required by the control module 3 to ensure the normal work of the control module 3.

[0069] It can be seen that the utility model converts the alternating current of the power grid into the required direct current for the control module 3 by voltage reduction and rectification of the power module 5 to ensure the normal work of the control module 3.

[0070] As an optional embodiment, the input communication unit 1 includes five input ends.

[0071] Specifically, if the number of inverters is not greater than 5, the input communication unit 1 includes 5 input terminals, the 5 input terminals are PV1, PV2, PV3, PV4 and PV5 respectively, only 1 hub switch needs to be connected with 1 input terminal of the input communication unit 1 of the hub switch, the inverter and the input communication unit 1 of the hub switch perform 1:1 data transmission, the inverter transmits data to the input communication unit 1 of the hub switch through the 485 line, the hub switch is a convergence transfer station for the 485 line of the inverter, the hub switch converges all data of the inverters to one way from the first output communication unit SC1 to the data acquisition module; if the number of inverters is greater than 5, multiple hub switches need to be set, and considering the economy, the number of hub switches should not be too much, and if the number of inverters is greater than 5 and even, all inverters can be evenly connected with each input terminal of the input communication unit 1 of the hub switch, or all input terminals of the input communication unit 1 of 1 hub switch are connected, and then the remaining inverters are connected to the input terminals of the input communication unit 1 of the input communication unit 1 of each input terminal of the next hub switch.

[0072] It can be seen that if the input communication unit 1 includes 5 input terminals, the number of hub switches can be flexibly set according to actual needs.

[0073] As an optional embodiment, the input communication unit 1 includes 6 input terminals.

[0074] Specifically, if the number of inverters is not greater than 6, only 1 hub switch needs to be connected with 1 input terminal of the input communication unit 1 of the hub switch, the inverter and the input communication unit 1 of the hub switch perform 1:1 data transmission, the inverter transmits data to the input communication unit 1 of the hub switch through the 485 line, the hub switch is a convergence transfer station for the 485 line of the inverter, the hub switch converges all data of the inverters to one way from the first output communication unit SC1 to the data acquisition module; if the number of inverters is greater than 6, multiple hub switches need to be set, and considering the economy, the number of hub switches should not be too much, and if the number of inverters is greater than 6 and even, all inverters can be evenly connected with each input terminal of the input communication unit 1 of the hub switch, or all input terminals of the input communication unit 1 of 1 hub switch are connected, and then the remaining inverters are connected to the input terminals of the input communication unit 1 of the input communication unit 1 of each input terminal of the next hub switch.

[0075] It can be seen that if the input communication unit 1 includes 6 input terminals, the number of hub switches can be flexibly set according to actual needs.

[0076] As an optional embodiment, the control module 3 includes:

[0077] a first resistor R11, a first end of the first resistor R11 is connected to a direct current, and a second end of the first resistor R11 is connected to a first end of a second resistor R22;

[0078] a second resistor R22, a second end of the second resistor R22 is connected to a second end of the N resistors 2;

[0079] a first triode VD1, a base of the first triode VD1 is connected to a common end of the first resistor R11 and the second resistor R22, an emitter of the first triode VD1 is connected to a first end of a third resistor R33, and a collector of the first triode VD1 is connected to the first end of the first resistor R11;

[0080] a third resistor R33, a second end of the third resistor R33 is connected to a second end of a fourth resistor R44;

[0081] a fourth resistor R44, a second end of the fourth resistor R44 is connected to the second end of the second resistor R22, and a common end after the connection is grounded;

[0082] a fifth resistor R55, a first end of the fifth resistor R55 is connected to a common end of the first end of the first resistor R11 and the collector of the first triode VD1, a second end of the fifth resistor R55 is connected to a collector of a second triode VD2, and a common end after the connection is connected to an input end of a first output communication unit SC1;

[0083] a second triode VD2, a base of the second triode VD2 is connected to a common end of the third resistor R33 and the fourth resistor R44, and an emitter of the second triode VD2 is connected to a common end of the second resistor R22 and the fourth resistor R44.

[0084] Specifically, the first end of the first resistor R11 is connected to a direct current of 5V, the first end of the first resistor R11 is connected to a direct current, and the second end of the first resistor R11 is connected to the first end of the second resistor R22; the second end of the second resistor R22 is connected to the second end of the N resistors 2; the base of the first triode VD1 is connected to the common end of the first resistor R11 and the second resistor R22, the emitter is connected to the first end of the third resistor R33, and the collector is connected to the first end of the first resistor R11; the second end of the third resistor R33 is connected to the second end of the fourth resistor R44; the second end of the fourth resistor R44 is connected to the second end of the second resistor R22, and the common end after connection is grounded; the first end of the fifth resistor R55 is connected to the common end of the first end of the first resistor R11 and the collector of the first triode VD1, the second end is connected to the collector of the second triode VD2, and the common end after connection is connected to the input end of the first output communication unit SC1; the base of the second triode VD2 is connected to the common end of the third resistor R33 and the fourth resistor R44, the emitter is connected to the common end of the second resistor R22 and the fourth resistor R44, and the control module 3 first acquires data and then transmits the data to the first output communication unit SC1.

[0085] It can be seen that the control module 3 is formed by the first resistor R11, the second resistor R22, the first triode VD1, the second resistor R22, the third resistor R33, the fourth resistor R44 and the second triode VD2 to acquire the data of the inverter and transmit the data to the first output communication unit SC1.

[0086] As an optional embodiment, the control module 3 further comprises:

[0087] The input end of the optical coupler UR is connected to the second end of the N resistors 2, and the output end is connected to the common end of the second resistor R22 and the fourth resistor R44, and is used for electric-optical-electric conversion of data.

[0088] Specifically, in order to effectively solve the interference of external lightning surge and ground potential difference on data transmission, the photoelectric isolation technology is adopted in the embodiment, and the optical coupler UR is arranged on the controller to provide photoelectric isolation of more than 3KV for the input communication unit 1. The optical coupler UR includes a light source and a light receiver, and the light source and the light receiver are assembled in the same sealed shell and are isolated from each other by a transparent insulator. The pin of the light source is the input end, and the pin of the light receiver is the output end. The light source can be a light-emitting diode, and the light receiver can be a photosensitive diode or a photosensitive triode. The control module 3 further comprises a sixth resistor R66 between the second end of the N resistors 2 and the optical coupler UR. Specifically, refer to Figure 3 Figure 3 A structural diagram of the control module is provided.​

[0089] Wherein, since the optical coupler UR includes three parts of light emission, light receiving and signal amplification, when the data of the inverter is transmitted to the control module 3 through the input end of the input communication unit 1, the input electrical signal will drive the light emitting diode to emit light of a certain wavelength, the light received by the light detector will generate a photocurrent, and then the photocurrent is amplified and output, thereby completing the conversion of electricity-optics-electricity.

[0090] It can be seen that, by utilizing the electricity-optics-electricity conversion characteristics of the optical coupler UR and utilizing the optical mode to realize signal isolation and transmission, the electrical interference and signal attenuation can be effectively prevented.

[0091] The utility model discloses still provide a kind of data collection device, including data acquisition device and as above-mentioned concentrator adapter, data acquisition device and concentrator adapter connect.

[0092] Specifically, 1 inverter is connected with the input end of the input communication unit 1 of the concentrator adapter, realizes 1 to 1 data transmission between the inverter and the input communication unit 1 of the concentrator adapter, and the inverter transmits data to the input communication unit 1 of the concentrator adapter through 485 line, the concentrator adapter is the 485 line convergence relay station of inverter, and the data of all inverters is converged to a way from the first output communication unit SC1 to the data acquisition module. Ensure that each inverter and concentrator adapter single-way communication, if 1 inverter fails, the data of other inverters without failure can still be uploaded to the data acquisition device.

[0093] In addition, the data collection device provided by the utility model is introduced as above-mentioned concentrator adapter embodiment, and the utility model will not be described here.

[0094] It can be seen that, by utilizing the input communication unit 1 of the concentrator adapter, the data of corresponding inverter is received, and then the data of each inverter is output from the first output communication unit SC1 to the data acquisition device through the control module 3, so that the data acquisition device receives the data of each inverter, if 1 inverter fails, the data of other inverters without failure can still be uploaded to the data acquisition device, avoid that 1 inverter failure causes the data loss of multiple inverters, improve the accuracy and integrity of data collection.

[0095] Each embodiment in the specification is described in a progressive manner, and each embodiment focuses on the difference from other embodiments, and the same or similar parts of each embodiment can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the related parts can be referred to the method part.

[0096] Those skilled in the art will further realize that the mere conception of the examples described herein is not inducing patentable subject matter, and that each of the examples represent a distinct application of the fundamental principles of the present application. The embodiments described herein with reference to the attached drawings are indicative of various ways in which the principles of the present application can be employed, and one skilled in the art will recognize the application is not limited to the specific examples described herein, but rather the application is intended to cover all possible combinations and sub-combinations of the various features and aspects described herein.

[0097] The foregoing description of the disclosed embodiments enables a person skilled in the art to make or use the application. Numerous modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application 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. A hub switcher, characterized by, The application relates to a communication unit for a plurality of inverters, comprising: an input communication unit, comprising a plurality of input terminals, each input terminal being connected to a corresponding inverter, and an output terminal connected to a first terminal of N resistors, for receiving data from each inverter; N resistors, a second terminal of each resistor being connected to a first terminal of a control module, for balancing the ground potential difference of each inverter; the control module, a second terminal of the control module being connected to an input terminal of a first output communication unit, for obtaining the data and transmitting the data to the first output communication unit; the first output communication unit, an output terminal of the first output communication unit being connected to a data acquisition device, for outputting the data to the data acquisition device.

2. The hub switch of claim 1, wherein, Further comprising: a first protocol conversion module, an input terminal of the first protocol conversion module being connected to the control module, and an output terminal of the first protocol conversion module being connected to an input terminal of a four-reserve communication unit, for converting the communication protocol of the data from the communication protocol of the input communication unit to the communication protocol of the four-reserve communication unit, so that the data can be output to a power grid through the four-reserve communication unit; the four-reserve communication unit, an output terminal of the four-reserve communication unit being connected to the power grid, and the communication protocol of the four-reserve communication unit being determined by the power grid.

3. The hub switch of claim 2, wherein, Further comprising: a second protocol conversion module, an input terminal of the second protocol conversion module being connected to the control module, and an output terminal of the second protocol conversion module being connected to a second output communication unit, for converting the communication protocol of the data from the communication protocol of the input communication unit to the communication protocol of the second output communication unit, so that the data can be output through the second output communication unit; the second output communication unit, the second output communication unit being connected to the second protocol conversion module.

4. The hub switch of claim 3, wherein, The second output communication unit is a 4G communication unit / HPLC communication unit.

5. The hub switcher of claim 1, wherein, Further comprising: a power module, an input terminal of the power module being connected to an alternating current, and an output terminal of the power module being connected to the control module, for reducing and rectifying the alternating current to provide direct current for the control module.

6. The hub switch of claim 1, wherein, The input communication unit comprises five input terminals.

7. The hub switch of claim 1, wherein, The input communication unit comprises six input terminals.

8. The hub switch of any of claims 1 to 7, wherein, The control module comprises: a first resistor, a first terminal of the first resistor being connected to direct current, and a second terminal of the first resistor being connected to a first terminal of a second resistor; the second resistor, a second terminal of the second resistor being connected to second terminals of N resistors; a first triode, a base of the first triode being connected to a common terminal of the first resistor and the second resistor, an emitter of the first triode being connected to a first terminal of a third resistor, and a collector of the first triode being connected to a first terminal of the first resistor; the third resistor, a second terminal of the third resistor being connected to a second terminal of a fourth resistor; the fourth resistor, a second terminal of the fourth resistor being connected to a second terminal of the second resistor, and a common terminal after connection being grounded; a fifth resistor, a first terminal of the fifth resistor being connected to a common terminal of the first terminal of the first resistor and the collector of the first triode, a second terminal of the fifth resistor being connected to a collector of a second triode, and a common terminal after connection being connected to an input terminal of the first output communication unit; The second triode, the base of the second triode is connected with the common end of the third resistor and the fourth resistor, the emitter is connected with the common end of the second resistor and the fourth resistor.

9. The hub switch of claim 8, wherein, The control module further comprises: An optical coupler, the input end of the optical coupler is connected with the second end of the N resistors, the output end is connected with the common end of the second resistor and the fourth resistor, for electric-optical-electric conversion of the data.

10. A data collection device, characterized by A data acquisition device and the hub adapter as claimed in any one of claims 1 to 9 are included, and the data acquisition device and the hub adapter are connected.

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