Data acquisition device of photovoltaic inverter

Abstract

The utility model discloses a data acquisition device of a photovoltaic inverter, which relates to the technical field of inverter communication and comprises an aviation plug, an inverter communication rod, a 485 switching circuit, a main control unit, a 4G communication module, a first power distribution cloud master station, a second power distribution cloud master station, a first step-down circuit and a second step-down circuit. The aviation plug is provided with an aviation plug conversion interface, the aviation plug is respectively connected with the inverter communication rod and the 485 switching circuit through the aviation plug conversion interface, the 485 switching circuit is further respectively connected with the inverter communication rod and the main control unit, the 4G communication module is further respectively connected with the main control unit and the second power distribution cloud master station, and the inverter communication rod is further connected with the first power distribution cloud master station. The system not only can be connected with an inverter produced by a company, but also can be connected with inverters of other manufacturers through the aviation plug conversion interface, so that power generation and power utilization information data of the inverters can be normally acquired by a power distribution cloud master station of a manufacturer and a power distribution cloud master station of a power grid company.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of inverter communication, and particularly relates to a data acquisition device of a photovoltaic inverter. BACKGROUND

[0002] With the increase of photovoltaic new energy access and the increase of grid connection demand, the power grid company needs to access inverter data to monitor and control the inverter, so as to control the output power of the inverter and control the output of the photovoltaic inverter.

[0003] The traditional communication rod realizes the acquisition of inverter power generation and power consumption information, and connects to the cloud platform of the manufacturer through 4G, cannot realize the connection to the power distribution cloud master station of the power grid company, and the traditional communication rod can only be applied to the inverters produced by the company itself and cannot be adapted to the products of other companies. CONTENT OF THE UTILITY MODEL

[0004] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides a data acquisition device of a photovoltaic inverter, which can not only connect to the inverters produced by the company itself, but also connect to the inverters of other manufacturers through an aviation plug conversion interface, and can realize the normal acquisition of inverter power generation and power consumption information data by the power distribution cloud master station of the manufacturer and the power distribution cloud master station of the power grid company.

[0005] The present application provides a data acquisition device of a photovoltaic inverter, comprising: an aviation plug, an inverter communication rod, a 485 switching circuit, a master control unit, a 4G communication module, a first power distribution cloud master station, a second power distribution cloud master station, a first voltage reduction circuit and a second voltage reduction circuit;

[0006] The aviation plug is provided with an aviation plug conversion interface, and the aviation plug is connected with the inverter communication rod and the 485 switching circuit through the aviation plug conversion interface. One end of the first voltage reduction circuit and the second voltage reduction circuit is connected with the aviation plug conversion interface. The other end of the first voltage reduction circuit is connected to the master control unit. The other end of the second voltage reduction circuit is connected to the 4G communication module. The 485 switching circuit is also connected with the inverter communication rod and the master control unit. The 4G communication module is also connected with the master control unit and the second power distribution cloud master station. The inverter communication rod is also connected with the first power distribution cloud master station.

[0007] The first power distribution cloud master station is the power distribution cloud master station of the manufacturer, the second power distribution cloud master station is the power distribution cloud master station of the power grid company, and the master control unit is the master control unit of the inverter photovoltaic communication rod.

[0008] According to some embodiments of the present application, the data acquisition device of the photovoltaic inverter further comprises a Bluetooth module, and the Bluetooth module is connected with the master control unit.

[0009] According to some embodiments of the present application, the inverter communication rod is provided with an inverter communication rod interface, and the inverter communication rod is connected with the navigation plug conversion interface and the 485 switching circuit through the inverter communication rod interface respectively.

[0010] According to some embodiments of the present application, the data acquisition device of the photovoltaic inverter further comprises a first power line, a first 485 bus and a second 485 bus, two ends of the first power line are connected with the navigation plug conversion interface and the inverter communication rod interface respectively, one end of the first voltage reduction circuit and the second voltage reduction circuit is connected to the end of the first power line close to the navigation plug conversion interface, two ends of the first 485 bus are connected with the navigation plug conversion interface and the 485 switching circuit respectively, and two ends of the second 485 bus are connected with the inverter communication rod interface and the 485 switching circuit respectively.

[0011] According to some embodiments of the present application, the first voltage reduction circuit is a DC / DC voltage reduction circuit converting 3.3V, and the second voltage reduction circuit is a DC / DC voltage reduction circuit converting 4.2V.

[0012] According to some embodiments of the present application, the data acquisition device of the photovoltaic inverter further comprises a second power line and an EMC filter, the EMC filter is arranged on the second power line, one end of the second power line is connected with the end of the first power line close to the navigation plug conversion interface, and the other end of the second power line is connected with one end of the first voltage reduction circuit away from the master control unit and one end of the second voltage reduction circuit away from the 4G communication module respectively.

[0013] In the present application, the main control unit is used to control the 485 switching circuit to transmit data to the power distribution cloud master station of the manufacturer by default through the inverter communication stick. When the power distribution cloud master station of the power grid company needs to collect data, the power distribution cloud master station of the power grid company sends a data request instruction to the main control unit through the 4G communication module. The main control unit sends a data transmission switching command to the 485 switching circuit according to the data request instruction. The 485 switching circuit obtains the data collected by the inverter communication stick according to the data transmission switching command and transmits the data to the power distribution cloud master station of the power grid company through the main control unit and the 4G communication module in turn. The aviation plug is used to supply power to the inverter corresponding to the inverter communication stick through the aviation plug conversion interface. The main control unit integrates the common inverter communication protocol. The main control unit can automatically identify the inverter communication protocol corresponding to the inverter communication stick connected to the aviation plug to realize data communication. The original one-way communication 485 port of the inverter is expanded into two ways. In the case of ensuring that the manufacturer cloud platform communication is not affected, the other 485 port is connected with the 4G communication module to realize the connection to the power distribution cloud master station of the power grid company. Thus, the two master stations can normally collect and issue control instructions, and realize the login switching of the power distribution cloud master station of the power grid company and the manufacturer cloud platform. Through the above arrangement, not only the inverters produced by the company can be connected, but also the inverters of other manufacturers can be connected through the aviation plug conversion interface. The power distribution cloud master station of the manufacturer and the power distribution cloud master station of the power grid company can normally collect the power generation and power consumption information data of the inverter.

[0014] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0015] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter.

[0016] Figure 1 The connection relationship diagram of the data collection device of the photovoltaic inverter provided for the embodiments of the present application.

[0017] REFERENCE NUMERALS

[0018] The aviation plug 110, the inverter communication stick 111, the 485 switching circuit 112, the main control unit 113, the 4G communication module 114, the first power distribution cloud master station 115, the second power distribution cloud master station 116, and the Bluetooth module 117.

[0019] The first power supply line 120, the second power supply line 121, the EMC filter 122, the first 485 bus 123, and the second 485 bus 124.

[0020] The first voltage reduction circuit 130, the first DC / DC converter 131, the second voltage reduction circuit 140, and the second DC / DC converter 141. DETAILED DESCRIPTION

[0021] Embodiments of the present application are described below in detail with reference to the accompanying drawings, wherein the same or similar notations used throughout the drawings and the specific description denote the same or similar elements or elements having the same or similar functions. The embodiments described below by reference to the accompanying drawings are exemplary and are for the purpose of explanation only, and are not to be understood as limiting the present application.

[0022] In the description of the present application, it should be understood that, in relation to the orientation description, for example, the orientation or position relationship indicated by the upper, lower, front, rear, left, right, etc. is based on the orientation or position relationship shown in the drawings, and is only for the purpose of facilitating the description of the present application and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0023] In the description of the present application, if the first, second, etc. are described, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying the relative importance of the technical features or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0024] In the description of the present application, unless otherwise explicitly limited, the words such as arrangement, installation, connection, etc. should be broadly understood, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0025] With the increase of photovoltaic new energy access and the increase of grid connection demand, the power grid company needs to access inverter data to monitor and control the inverter, so as to control the output power of the inverter and control the output of the photovoltaic inverter.

[0026] The traditional communication stick realizes the collection of inverter power generation and power consumption information, connects to the manufacturer's own cloud platform through 4G, cannot realize the connection to the power distribution cloud master station of the power grid company, and the traditional communication stick can only be applied to the inverters produced by the company itself, and cannot be adapted to the products of other companies.

[0027] In order to solve the above problems, the present application provides a data acquisition device for a photovoltaic inverter. The embodiments of the present application are further described below with reference to the accompanying drawings.

[0028] Reference Figure 1The application provides a data acquisition device of a photovoltaic inverter, which comprises an aviation plug 110, an inverter communication rod 111, a 485 switching circuit 112, a master control unit 113, a 4G communication module 114, a first power distribution cloud master station 115, a second power distribution cloud master station 116, a first voltage reduction circuit 130 and a second voltage reduction circuit 140. The aviation plug 110 is provided with an aviation plug conversion interface, and the aviation plug 110 is connected with the inverter communication rod 111 and the 485 switching circuit 112 through the aviation plug conversion interface. One end of the first voltage reduction circuit 130 and the second voltage reduction circuit 140 is connected with the aviation plug conversion interface. The other end of the first voltage reduction circuit 130 is connected to the master control unit 113, and the other end of the second voltage reduction circuit 140 is connected to the 4G communication module 114. The 485 switching circuit 112 is also connected with the inverter communication rod 111 and the master control unit 113. The 4G communication module 114 is also connected with the master control unit 113 and the second power distribution cloud master station 116. The inverter communication rod 111 is also connected with the first power distribution cloud master station 115. The first power distribution cloud master station 115 is a manufacturer power distribution cloud master station, the second power distribution cloud master station 116 is a power grid company power distribution cloud master station, and the master control unit 113 is an inverter photovoltaic communication rod master control unit 113.

[0029] It should be noted that the inverter communication rod 111 of the application integrates a conventional inverter communication protocol, which can not only connect the inverter produced by the company, but also connect the inverters of other manufacturers through the conversion interface, and automatically identify the inverter communication protocol of the corresponding manufacturer.

[0030] Specifically, the master control unit 113 controls the 485 switching circuit 112 to select the manufacturer 485 communication channel by default. When the power grid company power distribution cloud master station needs to collect data, the 4G communication module 114 is sent a communication command, the master control unit 113 sends a switching instruction to control the 485 switching circuit 112 to switch the 485 bus data to the power grid 485 channel, and then switch to the manufacturer communication channel after the communication is completed.

[0031] In the present application, the main control unit 113 is used to control the 485 switching circuit 112 to transmit data to the power distribution cloud master station of the manufacturer by default through the inverter communication stick 111. When the power distribution cloud master station of the grid company needs to collect data, the power distribution cloud master station of the grid company sends a data request instruction to the main control unit 113 through the 4G communication module 114. The main control unit 113 sends a data transmission switching command to the 485 switching circuit 112 according to the data request instruction. The 485 switching circuit 112 obtains the data collected by the inverter communication stick 111 and transmits the data to the power distribution cloud master station of the grid company through the main control unit 113 and the 4G communication module 114 in turn according to the data transmission switching command. The aviation plug 110 is used to supply power to the inverter corresponding to the inverter communication stick 111 through the aviation plug conversion interface. The main control unit 113 integrates the common inverter communication protocol. The main control unit 113 can automatically identify the inverter communication protocol corresponding to the inverter communication stick 111 connected to the aviation plug 110 to realize data communication. The original one-way communication 485 port of the inverter is expanded into two ways. In the case of ensuring that the manufacturer cloud platform communication is not affected, the other 485 port is connected to the 4G communication module 114 to realize the connection to the power distribution cloud master station of the grid company. Thus, the two master stations can normally collect and issue control instructions, and realize the login switching of the power distribution cloud master station of the grid company and the manufacturer cloud platform. Through this setting, not only the inverter produced by the company can be connected, but also the inverter of other manufacturers can be connected through the aviation plug conversion interface. The power distribution cloud master station of the manufacturer and the power distribution cloud master station of the grid company can normally collect inverter power generation and power consumption information data.

[0032] With reference to Figure 1 It can be understood that the data collection device of the photovoltaic inverter further comprises a Bluetooth module 117, and the Bluetooth module 117 is connected with the main control unit 113.

[0033] It should be noted that the inverter communication stick 111 is connected with the Bluetooth module 117 through the main control unit 113 to realize Bluetooth communication and achieve on-site Bluetooth wireless debugging.

[0034] It can be understood that the inverter communication stick 111 is provided with an inverter communication stick interface, and the inverter communication stick 111 is connected with the aviation plug conversion interface and the 485 switching circuit 112 through the inverter communication stick interface respectively.

[0035] With reference to Figure 1It can be understood that the data acquisition device of the photovoltaic inverter further comprises a first power line 120, a first 485 bus 123 and a second 485 bus 124, two ends of the first power line 120 are connected with the aviation plug conversion interface and the inverter communication rod interface respectively, one end of the first voltage reduction circuit 130 and the second voltage reduction circuit 140 is connected to the end of the first power line 120 close to the aviation plug conversion interface, two ends of the first 485 bus 123 are connected with the aviation plug conversion interface and the 485 switching circuit 112 respectively, two ends of the second 485 bus 124 are connected with the inverter communication rod interface and the 485 switching circuit 112 respectively.

[0036] It should be noted that the aviation plug conversion interface comprises the first power line 120 and the first 485 bus 123, the first 485 bus 123 is connected to the master control unit 113 through the 485 switching circuit 112, the master control unit 113 controls the 485 switching circuit 112 to realize channel selection; the original one-way communication 485 port of the inverter is expanded into two ways, in the case of ensuring that the manufacturer cloud platform communication is not affected, the other 485 port is connected to the 4G communication module 114, the 4G communication module 114 is connected to the power grid company distribution cloud master station, so that two master stations can normally collect and issue control instructions.

[0037] It can be understood that the first voltage reduction circuit 130 is a DC / DC voltage reduction circuit converting 3.3V, and the second voltage reduction circuit 140 is a DC / DC voltage reduction circuit converting 4.2V.

[0038] Referring to Figure 1 It can be understood that the data acquisition device of the photovoltaic inverter further comprises a second power line 121 and an EMC filter 122, the EMC filter 122 is arranged on the second power line 121, one end of the second power line 121 is connected with the end of the first power line 120 close to the aviation plug conversion interface, the other end of the second power line 121 is connected with the end of the first voltage reduction circuit 130 away from the master control unit 113 and the end of the second voltage reduction circuit 140 away from the 4G communication module 114 respectively.

[0039] It should be noted that the aviation plug 110 of the present application is a power aviation plug 110, the inverter communication rod 111 of the present application takes power from the first power line 120 connected with the aviation plug conversion interface, the master control unit 113 and the 4G communication module 114 pass through the EMC filter 122 on the second power line 121, and then pass through the DC / DC voltage reduction circuit to convert the power into 4.2V and 3.3V. 4.2V is used to power the 4G communication module 114, and 3.3V is used to power the master control unit 113.

[0040] Specifically, the first DC / DC converter 131 is arranged on the first voltage reduction circuit 130, and the second DC / DC converter 141 is arranged on the second voltage reduction circuit 140. The voltage delivered by the second power line 121 is partly converted to 3.3V by the first voltage reduction circuit 130, and the voltage delivered by the second power line 121 is partly converted to 4.2V by the second voltage reduction circuit 140.

[0041] It should be noted that the aviation plug 110 outputs different voltages according to different inverters connected with the inverter communication rod 111.

[0042] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0043] The above is the preferred embodiment of the present application. It should be noted that for those skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, which are also considered within the scope of protection of the present application.

[0044] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A data acquisition device for a photovoltaic inverter, characterized by The utility model relates to an aviation plug, an inverter communication rod, a 485 switching circuit, a master control unit, a 4G communication module, a first power distribution cloud master station, a second power distribution cloud master station, a first voltage reduction circuit and a second voltage reduction circuit. The aviation plug is provided with an aviation plug conversion interface, and the aviation plug is connected with the inverter communication rod and the 485 switching circuit through the aviation plug conversion interface. The first voltage reduction circuit and the second voltage reduction circuit are connected with the aviation plug conversion interface. The first power distribution cloud master station is a manufacturer power distribution cloud master station, the second power distribution cloud master station is a power grid company power distribution cloud master station, and the master control unit is an inverter photovoltaic communication rod master control unit.

2. The data acquisition device for a photovoltaic inverter according to claim 1, characterized in that, The data acquisition device of the photovoltaic inverter further comprises a Bluetooth module connected with the master control unit.

3. The data acquisition device for a photovoltaic inverter according to claim 1, characterized in that, The inverter communication rod is provided with an inverter communication rod interface, and the inverter communication rod is connected with the aviation plug conversion interface and the 485 switching circuit through the inverter communication rod interface.

4. The data acquisition device for a photovoltaic inverter according to claim 3, characterized in that, The data acquisition device of the photovoltaic inverter further comprises a first power line, a first 485 bus and a second 485 bus. The two ends of the first power line are respectively connected with the aviation plug conversion interface and the inverter communication rod interface. The first voltage reduction circuit and the second voltage reduction circuit are connected with the first power line close to the aviation plug conversion interface. The two ends of the first 485 bus are respectively connected with the aviation plug conversion interface and the 485 switching circuit. The two ends of the second 485 bus are respectively connected with the inverter communication rod interface and the 485 switching circuit.

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