A photovoltaic inverter protocol conversion method, system, device and program product

Abstract

The application belongs to the technical field of protocol conversion, and specifically discloses a photovoltaic inverter protocol conversion method, system, device and program product. Photovoltaic inverter data frames are collected through an adaptive data collection interface, and corresponding interface numbers are determined. Then, the interface numbers are matched with protocol field positions and data cache queues. The protocol field positions are used to extract protocol fields for data frame analysis and verification, and frame body data is obtained. The frame body data is encoded into the data cache queue. Finally, data is intercepted and packaged based on the target conversion protocol, and protocol conversion data frames are sent to the intelligent terminal of the transformer area. The application can effectively adapt to different types of photovoltaic inverter data interfaces, perform targeted transmission data protocol analysis and protocol conversion processing, realize unified protocol data reporting, improve the convenience of photovoltaic cluster system operation and maintenance, and effectively improve the efficiency and reliability of photovoltaic inverter data protocol conversion.

Description

Technical Field

[0001] This invention belongs to the field of protocol conversion technology, specifically relating to a photovoltaic inverter protocol conversion method, system, equipment, and program product. Background Technology

[0002] In distributed photovoltaic (PV) cluster systems, the unified collection of data from PV inverters at numerous and widely distributed PV power stations presents a significant challenge, particularly given the diverse protocols used by these inverters. Numerous PV inverter manufacturers exist, resulting in a wide variety of communication protocols for grid-connected PV inverters. Smart terminals in the distribution areas often lack effective compatibility with these different product protocol standards, necessitating the use of various protocol converters. This leads to increased system maintenance costs and increased complexity in data management. Therefore, a method is urgently needed that effectively supports the communication protocols of all grid-connected inverters in a distributed PV cluster, enabling unified protocol conversion and uploading of PV cluster inverter data. Summary of the Invention

[0003] The purpose of this invention is to provide a photovoltaic inverter protocol conversion method, system, device, and program product to solve the above-mentioned problems existing in the prior art.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] Firstly, a photovoltaic inverter protocol conversion method is provided, including:

[0006] Acquire the photovoltaic inverter data frame received by the corresponding data acquisition interface of the data acquisition module, and determine the interface number of the data acquisition interface that receives the photovoltaic inverter data frame;

[0007] The location of the protocol field in the photovoltaic inverter data frame and the target data buffer queue corresponding to the data acquisition interface are determined based on the interface number.

[0008] Extract the protocol field from the photovoltaic inverter data frame based on the protocol field location, and determine the corresponding data parsing protocol based on the protocol field;

[0009] The photovoltaic inverter data frames are decoded based on the data parsing protocol to obtain the corresponding frame header data, frame body data and frame tail data;

[0010] Data verification is performed using the frame tail data, address verification is performed using the frame header data, and the frame body data is extracted when both data verification and address verification pass.

[0011] The frame data is encoded into the corresponding target data buffer queue, and the target data buffer queue is processed by data interception and encapsulation based on the set target conversion protocol to obtain the protocol conversion data frame.

[0012] The protocol-converted data frames are transmitted to the smart terminal in the distribution area through the data transmission interface of the data transmission module.

[0013] In one possible design, determining the interface number of the data acquisition interface that receives data frames from the photovoltaic inverter includes:

[0014] When acquiring data frames from the photovoltaic inverter, the interface identifier field of the corresponding data acquisition interface transmitted by the data acquisition module is acquired simultaneously.

[0015] Perform a number conversion on the interface identifier field to obtain the corresponding interface number.

[0016] In one possible design, determining the protocol field position of the photovoltaic inverter data frame and the target data buffer queue corresponding to the corresponding data acquisition interface based on the interface number includes:

[0017] The interface number is converted and calculated to obtain the corresponding decoding number;

[0018] Use the field position associated with the decoding number as the protocol field position, and use the data cache queue associated with the decoding number as the target data cache queue.

[0019] In one possible design, determining the corresponding data parsing protocol based on the protocol field includes:

[0020] Perform a number conversion on the protocol field to obtain the corresponding hexadecimal data string;

[0021] The hexadecimal data string is imported into a set data protocol table for matching to determine the corresponding data parsing protocol. The data protocol table contains several hexadecimal data strings and the data parsing protocol associated with each hexadecimal data string.

[0022] In one possible design, the data verification using frame tail data includes:

[0023] Perform modulo-2 division on the end-of-frame data to obtain the corresponding remainder;

[0024] The remainder of the operation is compared with a set reference value. If the remainder matches the reference value, the data verification is considered successful. If the remainder does not match the reference value, the data verification is considered unsuccessful.

[0025] In one possible design, the address verification using frame header data includes:

[0026] Determine the start flag field in the frame header data, and use the first address field after the start flag field as the destination address field;

[0027] Extract the destination address field and perform a number system conversion on the destination address field to obtain the corresponding destination address string;

[0028] The destination address string is compared with the pre-stored local address string. If the destination address string matches the local address string, the address verification is considered successful. If the destination address string does not match the local address string, the address verification is considered unsuccessful.

[0029] In one possible design, the process of extracting and encapsulating data from the target data buffer queue based on the set target conversion protocol to obtain a protocol-converted data frame includes:

[0030] The frame header format, frame trailer format, and frame body byte count are determined according to the set target conversion protocol.

[0031] The corresponding encapsulated frame body is extracted from the target data buffer queue according to the number of bytes in the frame body, and the encapsulated frame header and encapsulated frame tail are generated according to the frame header format and frame tail format.

[0032] Data frames are encapsulated using the encapsulation frame header, encapsulation frame body, and encapsulation frame trailer to obtain the corresponding protocol-converted data frames.

[0033] Secondly, a photovoltaic inverter protocol conversion system is provided, comprising a data acquisition module, a number matching module, a protocol determination module, a data parsing module, an information verification module, a protocol conversion module, and a data transmission module, wherein:

[0034] The data acquisition module is used to establish data connection with the photovoltaic inverter through the corresponding data acquisition interface, and to receive the photovoltaic inverter data frames transmitted by the photovoltaic inverter through the corresponding data acquisition interface, and to determine the interface number of the data acquisition interface that receives the photovoltaic inverter data frames.

[0035] The number matching module is used to determine the location of the protocol field of the photovoltaic inverter data frame and the target data buffer queue corresponding to the corresponding data acquisition interface based on the interface number.

[0036] The protocol determination module is used to extract the protocol field from the photovoltaic inverter data frame according to the protocol field position, and determine the corresponding data parsing protocol according to the protocol field;

[0037] The data parsing module is used to decode the photovoltaic inverter data frames based on the data parsing protocol to obtain the corresponding frame header data, frame body data and frame tail data;

[0038] The information verification module is used to perform data verification using the frame tail data, address verification using the frame header data, and extract the frame body data when both data verification and address verification pass.

[0039] The protocol conversion module is used to encode frame data into the corresponding target data buffer queue, and to perform data interception and encapsulation processing on the target data buffer queue based on the set target conversion protocol to obtain the protocol-converted data frame.

[0040] The data transmission module is used to transmit protocol-converted data frames to the smart terminal in the distribution area through the data transmission interface.

[0041] Thirdly, a photovoltaic inverter protocol conversion device is provided, comprising:

[0042] Memory, used to store instructions;

[0043] A processor is configured to read instructions stored in the memory and execute the method described in any one of the first aspects above, according to the instructions.

[0044] Fourthly, a computer-readable storage medium is provided, on which instructions are stored, which, when executed on a computer, cause the computer to perform any of the methods described in the first aspect. A computer program product is also provided, which, when executed on a computer, performs any of the methods described in the first aspect.

[0045] Beneficial Effects: This invention acquires photovoltaic inverter data frames through an adapted data acquisition interface and determines the corresponding interface number. Then, it matches the protocol field position and data cache queue based on the interface number. Next, it extracts the protocol fields using the protocol field positions for data frame parsing and verification, obtaining the frame body data. This frame body data is then encoded into the data cache queue. Finally, based on the target conversion protocol, the data cache queue undergoes data interception and encapsulation processing to obtain a protocol-converted data frame, which is sent to the intelligent terminal in the distribution area. This achieves efficient protocol conversion of photovoltaic inverter data. This invention can effectively adapt to different types of photovoltaic inverter data interfaces, performing targeted transmission data protocol parsing and conversion processing, achieving unified protocol data reporting, improving the convenience of photovoltaic cluster system data operation and maintenance, and effectively improving the efficiency and reliability of photovoltaic inverter data protocol conversion. Attached Figure Description

[0046] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0047] Figure 1 This is a schematic diagram of the steps in the method of Embodiment 1 of the present invention;

[0048] Figure 2 This is a schematic diagram of the system configuration in Embodiment 2 of the present invention;

[0049] Figure 3 This is a schematic diagram of the device configuration in Embodiment 3 of the present invention. Detailed Implementation

[0050] It should be noted that the descriptions of these embodiments are intended to aid in understanding the invention and do not constitute a limitation thereof. The specific structural and functional details disclosed herein are merely for describing exemplary embodiments of the invention. However, the invention may be embodied in many alternative forms and should not be construed as being limited to the embodiments described herein.

[0051] It should be understood that, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments according to the specific circumstances.

[0052] Specific details are provided in the following description to provide a complete understanding of the exemplary embodiments. However, those skilled in the art will understand that the exemplary embodiments can be implemented without these specific details. For example, apparatus may be shown in block diagrams to avoid obscuring the examples with unnecessary details. In other embodiments, well-known processes, structures, and techniques may be omitted with non-essential details to avoid obscuring the embodiments.

[0053] Example 1:

[0054] This embodiment provides a photovoltaic inverter protocol conversion method, which can be applied to corresponding photovoltaic inverter protocol converters, such as... Figure 1 As shown, the method includes the following steps:

[0055] S1. Obtain the photovoltaic inverter data frame received by the corresponding data acquisition interface of the data acquisition module, and determine the interface number of the data acquisition interface that receives the photovoltaic inverter data frame.

[0056] In practical implementation, the protocol converter interfaces with the photovoltaic inverter via a data acquisition module. This module has various data acquisition interfaces, including but not limited to RS485, I2C, SPI, UART, USB, CAN, JTAG, and PCI / PCIE, which can be selected based on the interface type of the actual photovoltaic inverter. Each data acquisition interface of the data acquisition module has a corresponding interface number. When the data acquisition module receives a data frame from the photovoltaic inverter through the corresponding interface, it synchronously outputs the interface identifier field of the corresponding data acquisition interface. When the protocol converter acquires a data frame from the photovoltaic inverter, it synchronously acquires the interface identifier field of the corresponding data acquisition interface transmitted by the data acquisition module, and then performs a binary conversion to obtain the corresponding interface number.

[0057] S2. Determine the location of the protocol field in the photovoltaic inverter data frame and the target data buffer queue corresponding to the data acquisition interface based on the interface number.

[0058] In practice, the protocol converter can perform data conversion calculations on the interface number, such as hash value calculation, to obtain the corresponding decoding number. Then, the field position associated with the decoding number is used as the protocol field position, and the data cache queue associated with the decoding number is used as the target data cache queue.

[0059] S3. Extract the protocol field from the photovoltaic inverter data frame according to the protocol field position, and determine the corresponding data parsing protocol according to the protocol field.

[0060] In practice, the protocol converter can directly extract the corresponding protocol field, such as the Type field, from the photovoltaic inverter data frame based on the location of the protocol field; then perform a base conversion on the protocol field to obtain the corresponding hexadecimal data string; then import the hexadecimal data string into a set data protocol table for matching to determine the corresponding data parsing protocol. The data protocol table contains several hexadecimal data strings and the data parsing protocol associated with each hexadecimal data string.

[0061] S4. Decode the photovoltaic inverter data frame based on the data parsing protocol to obtain the corresponding frame header data, frame body data and frame tail data.

[0062] In practice, after determining the data parsing protocol, the protocol converter can decode the photovoltaic inverter data frame based on the data parsing protocol to obtain the corresponding frame header data, frame body data and frame tail data. The frame header data includes binary start flag field and destination address field, the frame body data includes binary data to be transmitted, and the frame tail data includes binary check code data.

[0063] S5. Perform data verification using the frame tail data, perform address verification using the frame header data, and extract the frame body data when both data verification and address verification pass.

[0064] In practice, the protocol converter performs a modulo-2 division operation on the frame tail data to obtain the corresponding remainder. Then, it compares the remainder with a set reference value. When the remainder matches the reference value, the data verification is deemed successful. When the remainder does not match the reference value, the data verification is deemed unsuccessful.

[0065] Meanwhile, the protocol converter also determines the start flag field in the frame header data according to the data parsing protocol, and takes the first address field after the start flag field as the destination address field; then it extracts the destination address field and performs a radix conversion on the destination address field to obtain the corresponding destination address string; then it compares the destination address string with the pre-stored local address string. When the destination address string matches the local address string, the address verification is determined to be successful; when the destination address string does not match the local address string, the address verification is determined to be unsuccessful.

[0066] When both data verification and address verification pass, the protocol converter extracts the frame data for further processing. If either data verification or address verification fails, the photovoltaic inverter data frame is fed back to the photovoltaic inverter.

[0067] S6. Encode the frame body data into the corresponding target data buffer queue, and perform data interception and encapsulation processing on the target data buffer queue based on the set target conversion protocol to obtain the protocol conversion data frame.

[0068] In practice, the protocol converter sequentially encodes the corresponding frame body data into the corresponding target data buffer queue. At the same time, it determines the frame header format, frame trailer format, and frame body byte count according to the set target conversion protocol. Then, based on the frame body byte count, it extracts the corresponding encapsulated frame body from the target data buffer queue and generates an encapsulated frame header and encapsulated frame trailer according to the frame header and frame trailer formats. Finally, it uses the encapsulated frame header, encapsulated frame body, and encapsulated frame trailer to encapsulate the data frame, thereby obtaining the corresponding protocol-converted data frame and realizing the protocol conversion processing of the data to be transmitted.

[0069] S7. Transmit the protocol-converted data frame to the smart terminal in the distribution area through the data transmission interface of the data transmission module.

[0070] In practice, the protocol converter transmits the protocol conversion data frames to the smart terminal in the distribution area through the data transmission interface of the data transmission module, so that the smart terminal in the distribution area can receive photovoltaic inverter data of the same protocol type for rapid parsing and processing, thereby improving the convenience of data operation and maintenance of the photovoltaic cluster system.

[0071] The method in this embodiment can effectively adapt to different types of photovoltaic inverter data interfaces, perform targeted data transmission protocol parsing and protocol conversion processing, realize unified protocol data reporting, improve the convenience of photovoltaic cluster system data operation and maintenance, and effectively improve the efficiency and reliability of photovoltaic inverter data protocol conversion.

[0072] Example 2:

[0073] This embodiment provides a photovoltaic inverter protocol conversion system, such as Figure 2 As shown, it includes a data acquisition module, a number matching module, a protocol determination module, a data parsing module, an information verification module, a protocol conversion module, and a data transmission module, wherein:

[0074] The data acquisition module is used to establish data connection with the photovoltaic inverter through the corresponding data acquisition interface, and to receive the photovoltaic inverter data frames transmitted by the photovoltaic inverter through the corresponding data acquisition interface, and to determine the interface number of the data acquisition interface that receives the photovoltaic inverter data frames.

[0075] The number matching module is used to determine the location of the protocol field of the photovoltaic inverter data frame and the target data buffer queue corresponding to the corresponding data acquisition interface based on the interface number.

[0076] The protocol determination module is used to extract the protocol field from the photovoltaic inverter data frame according to the protocol field position, and determine the corresponding data parsing protocol according to the protocol field;

[0077] The data parsing module is used to decode the photovoltaic inverter data frames based on the data parsing protocol to obtain the corresponding frame header data, frame body data and frame tail data;

[0078] The information verification module is used to perform data verification using the frame tail data, address verification using the frame header data, and extract the frame body data when both data verification and address verification pass.

[0079] The protocol conversion module is used to encode frame data into the corresponding target data buffer queue, and to perform data interception and encapsulation processing on the target data buffer queue based on the set target conversion protocol to obtain the protocol-converted data frame.

[0080] The data transmission module is used to transmit protocol-converted data frames to the smart terminal in the distribution area through the data transmission interface.

[0081] Example 3:

[0082] This embodiment provides a photovoltaic inverter protocol conversion device, such as... Figure 3 As shown, at the hardware level, it includes:

[0083] The data interface is used to establish data connection between the processor and the photovoltaic inverter and the smart terminal of the distribution area;

[0084] Memory, used to store instructions;

[0085] The processor is used to read the instructions stored in the memory and execute the photovoltaic inverter protocol conversion method in Embodiment 1 according to the instructions.

[0086] Optionally, the device also includes an internal bus, through which the processor, memory, and data interface can be interconnected. This internal bus can be an ISA (Industry Standard Architecture) bus, a PCI (Peripheral Component Interconnect) bus, or an EISA (Extended Industry Standard Architecture) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc.

[0087] The memory may include, but is not limited to, random access memory (RAM), read-only memory (ROM), flash memory, first-in-first-out (FIFO) memory, and / or first-in-last-out (FILO) memory. The processor may be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it may also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components.

[0088] Example 4:

[0089] This embodiment provides a computer-readable storage medium storing instructions. When these instructions are executed on a computer, the computer performs the photovoltaic inverter protocol conversion method described in Embodiment 1. The computer-readable storage medium refers to a data storage medium, which may include, but is not limited to, floppy disks, optical disks, hard disks, flash memory, USB flash drives, and / or Memory Sticks. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.

[0090] This embodiment also provides a computer program product that, when run on a computer, executes the photovoltaic inverter protocol conversion method in Embodiment 1. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device.

[0091] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A photovoltaic inverter protocol conversion method, characterized in that, include: Acquire the photovoltaic inverter data frame received by the corresponding data acquisition interface of the data acquisition module, and determine the interface number of the data acquisition interface that receives the photovoltaic inverter data frame; Determining the protocol field position of the photovoltaic inverter data frame and the target data buffer queue corresponding to the corresponding data acquisition interface based on the interface number includes: performing data conversion calculation on the interface number to obtain the corresponding decoding number; using the field position associated with the decoding number as the protocol field position, and using the data buffer queue associated with the decoding number as the target data buffer queue; Extracting protocol fields from the photovoltaic inverter data frame based on the protocol field location, and determining the corresponding data parsing protocol based on the protocol fields, including: performing a base conversion on the protocol fields to obtain the corresponding hexadecimal data string; importing the hexadecimal data string into a set data protocol table for matching to determine the corresponding data parsing protocol, wherein the data protocol table contains several hexadecimal data strings and the data parsing protocol associated with each hexadecimal data string; The photovoltaic inverter data frames are decoded based on the data parsing protocol to obtain the corresponding frame header data, frame body data and frame tail data; Data verification is performed using the frame tail data, address verification is performed using the frame header data, and the frame body data is extracted when both data verification and address verification pass. The frame data is encoded into the corresponding target data buffer queue, and the target data buffer queue is processed by data interception and encapsulation based on the set target conversion protocol to obtain the protocol conversion data frame. The protocol-converted data frames are transmitted to the smart terminal in the distribution area through the data transmission interface of the data transmission module.

2. The photovoltaic inverter protocol conversion method according to claim 1, characterized in that, The process of determining the interface number of the data acquisition interface for receiving photovoltaic inverter data frames includes: When acquiring data frames from the photovoltaic inverter, the interface identifier field of the corresponding data acquisition interface transmitted by the data acquisition module is acquired simultaneously. Perform a number conversion on the interface identifier field to obtain the corresponding interface number.

3. The photovoltaic inverter protocol conversion method according to claim 1, characterized in that, The data verification using frame tail data includes: Perform modulo-2 division on the end-of-frame data to obtain the corresponding remainder; The remainder of the operation is compared with a set reference value. If the remainder matches the reference value, the data verification is considered successful. If the remainder does not match the reference value, the data verification is considered unsuccessful.

4. The photovoltaic inverter protocol conversion method according to claim 1, characterized in that, The address verification using frame header data includes: Determine the start flag field in the frame header data, and use the first address field after the start flag field as the destination address field; Extract the destination address field and perform a number system conversion on the destination address field to obtain the corresponding destination address string; The destination address string is compared with the pre-stored local address string. If the destination address string matches the local address string, the address verification is considered successful. If the destination address string does not match the local address string, the address verification is considered unsuccessful.

5. The photovoltaic inverter protocol conversion method according to claim 1, characterized in that, The process of extracting and encapsulating data from the target data cache queue based on the set target conversion protocol to obtain a protocol-converted data frame includes: The frame header format, frame trailer format, and frame body byte count are determined according to the set target conversion protocol. The corresponding encapsulated frame body is extracted from the target data buffer queue according to the number of bytes in the frame body, and the encapsulated frame header and encapsulated frame tail are generated according to the frame header format and frame tail format. Data frames are encapsulated using the encapsulation frame header, encapsulation frame body, and encapsulation frame trailer to obtain the corresponding protocol-converted data frames.

6. A photovoltaic inverter protocol conversion system, characterized in that, It includes a data acquisition module, a number matching module, a protocol determination module, a data parsing module, an information verification module, a protocol conversion module, and a data transmission module, among which: The data acquisition module is used to establish data connection with the photovoltaic inverter through the corresponding data acquisition interface, and to receive the photovoltaic inverter data frames transmitted by the photovoltaic inverter through the corresponding data acquisition interface, and to determine the interface number of the data acquisition interface that receives the photovoltaic inverter data frames. The number matching module is used to determine the protocol field position of the photovoltaic inverter data frame and the target data buffer queue corresponding to the corresponding data acquisition interface based on the interface number. This includes: performing data conversion calculation on the interface number to obtain the corresponding decoding number; using the field position associated with the decoding number as the protocol field position; and using the data buffer queue associated with the decoding number as the target data buffer queue. The protocol determination module is used to extract the protocol field from the photovoltaic inverter data frame according to the protocol field position, and determine the corresponding data parsing protocol according to the protocol field. This includes: performing a base conversion on the protocol field to obtain the corresponding hexadecimal data string; importing the hexadecimal data string into a set data protocol table for matching to determine the corresponding data parsing protocol. The data protocol table contains several hexadecimal data strings and the data parsing protocol associated with each hexadecimal data string. The data parsing module is used to decode the photovoltaic inverter data frames based on the data parsing protocol to obtain the corresponding frame header data, frame body data and frame tail data; The information verification module is used to perform data verification using the frame tail data, address verification using the frame header data, and extract the frame body data when both data verification and address verification pass. The protocol conversion module is used to encode frame data into the corresponding target data buffer queue, and to perform data interception and encapsulation processing on the target data buffer queue based on the set target conversion protocol to obtain the protocol-converted data frame. The data transmission module is used to transmit protocol-converted data frames to the smart terminal in the distribution area through the data transmission interface.

7. A photovoltaic inverter protocol conversion device, characterized in that, include: Memory, used to store instructions; A processor is configured to read instructions stored in the memory and execute the photovoltaic inverter protocol conversion method according to any one of claims 1-5.

8. A computer program product, characterized in that, When the computer program product is run on a computer, it executes the photovoltaic inverter protocol conversion method according to any one of claims 1-5.

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