Direct current distribution network tester based on FPGA and distribution network test equipment

Abstract

The utility model discloses an FPGA-based DC distribution network tester and a distribution network test device. The tester comprises a man-machine interaction module, a serial transmit-receive data module, an FPGA module, a 5G communication module and a switching value module. The man-machine interaction module is connected with an LVDS interface of the FPGA module, and realizes touch control through an IIC interface of the FPGA module; the serial data receiving and transmitting module comprises an electric serial data receiving and transmitting module and an optical serial data receiving and transmitting module, and the electric serial data receiving and transmitting module is connected with the FPGA module and used for transmitting the received electric FT3 protocol to the direct current merging unit; the optical serial data transceiver module is connected with the FPGA module and is used for transmitting the received optical FT3 protocol to the direct current merging unit; the 5G communication module is connected with a PCIE interface of the FPGA module; and the switching value module is connected with the FPGA module. The device can test the DC mutual inductor and the DC merging unit.

Description

Technical Field

[0001] The utility model belongs to the technical field of direct current distribution network, and specifically relates to a direct current distribution network tester and distribution network testing equipment based on FPGA. Background Art

[0002] In recent years, with the widespread application of high-voltage direct current transmission technology in power systems, low-voltage direct current distribution technology has gradually matured. The direct current distribution network has greater advantages than the alternating current distribution network in terms of controllability, improving power supply quality and convenience, and can effectively reduce power loss and operating costs. As key equipment in direct current transmission projects, the performance of direct current transformers and direct current merging units is related to the accuracy and reliability of direct current transmission. At present, the transformer tester and merging unit tester on the market can only receive the conventional FT3 protocol output by the digital output type of AC transformers and AC merging units. The direct current transformers and merging units have high sampling frequency, special protocols, and variable interfaces. Therefore, there are very few testers for digital output type DC transformers and DC merging units, and the hardware interface needs to be modified. Therefore, a tester for DC transformers and DC merging units for direct current distribution networks is needed to ensure the smooth verification and calibration of direct current distribution networks. Utility Model Content

[0003] The main purpose of the utility model is to overcome the shortcomings and deficiencies of the prior art and to provide a DC distribution network tester and distribution network test equipment based on FPGA, which can effectively detect the DC transformer and DC merging unit of the DC distribution network.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] In the first aspect, the utility model provides a DC distribution network tester based on FPGA, including a human-computer interaction module, a serial data transceiver module, an FPGA module, a 5G communication module and a switch quantity module;

[0006] The human-computer interaction module is connected to the LVDS interface of the FPGA module, and touch control is realized through the IIC interface of the FPGA module;

[0007] The serial data transceiver module includes an electrical serial data transceiver module and an optical serial data transceiver module, which are used to receive the FT3 protocol sent by the external DC transformer; the electrical serial data transceiver module is connected to the FPGA module, which is used to receive the electrical FT3 protocol sent by the external DC transformer, and send the electrical FT3 protocol to the DC merging unit; the optical serial data transceiver module is connected to the FPGA module, which is used to receive the optical FT3 protocol sent by the external DC transformer, and send the optical FT3 protocol to the external DC merging unit;

[0008] The 5G communication module is connected to the PCIE interface of the FPGA module;

[0009] The switch quantity module is connected to the FPGA module.

[0010] As a preferred technical solution, the FPGA module is used to use a local clock reference according to parameters set by the human-computer interaction module; or to adjust the local clock reference according to a synchronization pulse received from the serial data transceiver module.

[0011] As a preferred technical solution, the serial data transceiver module is used to mark the FT3 protocol with the current serial port sequence number and timestamp information after receiving the FT3 protocol sent by the external DC transformer, and send it to the 5G communication module or the human-computer interaction module through the PCIE interface of the FPGA module.

[0012] As a preferred technical solution, the human-computer interaction module adopts an LCD display screen.

[0013] As a preferred technical solution, the optical serial data transceiver module adopts the HFBR2416 transceiver.

[0014] As a preferred technical solution, the electrical serial data transceiver module adopts a MAX22502E receiver.

[0015] As a preferred technical solution, the FPGA module adopts Zynq series chips.

[0016] As a preferred technical solution, the 5G communication module adopts RG520N.

[0017] As a preferred technical solution, the switch quantity module includes a binary input quantity module and a binary output quantity module, and both the binary input quantity module and the binary output quantity module are connected to the FPGA module.

[0018] In a second aspect, the utility model provides a distribution network test device, including the FPGA-based DC distribution network tester, a DC transformer and a DC merging unit; the DC transformer and the DC merging unit are connected to the DC distribution network tester.

[0019] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0020] The utility model proposes an FPGA-based DC distribution network tester, which adopts a more compact and integrated design. Compared with existing products, it has richer interfaces and can receive not only optical FT3 but also RS485 level type electrical FT3. It is compatible with a variety of FT3 protocols and custom protocols and has 5G communication capabilities. It can realize remote control and data transmission. The overall structure is more compact and convenient to carry, and the power consumption is low, without the problem of high heat generation of the separate CPU. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 This is a structural schematic diagram of a DC distribution network tester based on FPGA in the utility model;

[0023] Figure 2 This is a schematic diagram of the full-duplex connection of the MAX22502E of the utility model;

[0024] Figure 3 It is a structural schematic diagram of the distribution network testing equipment of the utility model. DETAILED DESCRIPTION

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] See also Figure 1The utility model provides a DC distribution network tester based on FPGA, including a human-computer interaction module, a serial transceiver module, an FPGA module, a 5G communication module and a switch module; the human-computer interaction module, the serial transceiver module, the 5G communication module and the switch module are all connected to the FPGA module; the DC distribution network tester can automatically identify the message format, rate and frame length of the FT3 of the optical FT3 interface or the electrical FT3 interface, and after internal cache processing, merge according to the setting of the human-computer interaction module or send it separately to the human-computer interaction module or the remote control center for recording and analysis. In this embodiment, the FPGA module first uses the local clock reference according to the parameters set by the human-computer interaction module, or adjusts the local clock reference according to the synchronization pulse received from the serial port transceiver module, such as PPS or IRIG-B code timing pulse. When the serial transceiver data module receives the FT3 message sent from the DC transformer, it can output or not output the output signal of the switch module as required, and at the same time, mark the FT3 message received from the serial transceiver data module with the current serial port sequence number and timestamp information, and send it to the 5G communication module or the human-computer interaction module through the PCIE interface.

[0027] The FT3 protocol transmitted and received by the optical serial data transceiver module mainly uses FT3 encoded in the fiber Manchester coding format. Manchester code is a synchronous clock coding technology and a self-synchronous coding method, that is, the clock synchronization signal is hidden in the data waveform.

[0028] The FT3 protocol transmitted and received by the electrical serial data transceiver module mainly uses the asynchronous serial FT3 format of RS485 differential level.

[0029] When the human-computer interaction module is configured to detect the DC merging unit function, it will determine whether to receive the switch input signal from the switch module as needed, and self-fit the FT3 message data, and send the FT3 frame message to the optical serial data sending module or the electrical serial data sending module through the serial data transceiver module;

[0030] The FPGA module will output timing signals such as PPS and IRIG-B code from the remaining serial transmission ports of the serial data transceiver module according to the settings of the human-computer interaction module.

[0031] The FPGA module can simultaneously receive FT3 messages from multiple serial data transceiver modules, and has corresponding time information and port information, etc., merge all messages or send converted Ethernet frame messages to the human-computer interaction module or the 5G communication module separately, and provide the human-computer interaction module or the remote control center with display waveforms, switch quantities and other data.

[0032] In a specific embodiment, the human-computer interaction module is connected to the LVDS interface of the FPGA module, and touch control is realized through the IIC interface of the FPGA module. Specifically, the logic control and processor of the FPGA module are connected to the LVDS interface and the IIC interface through Cortex-A9, the LVDS interface is connected to the external display screen, and the IIC interface is connected to the external touch screen, so as to realize the human-computer interaction function during the test.

[0033] Furthermore, the human-computer interaction module described in this embodiment uses Advantech's IDK-2112P-K2XGA1 ultra-high brightness industrial display, which is a 12.1-inch LCD display with excellent sunlight readability and highly sensitive touch feedback, which further enhances the operating experience.

[0034] Please refer again Figure 1 In a specific embodiment, the serial data transceiver module includes an electrical serial data transceiver module and an optical serial data transceiver module. The electrical serial data transceiver module is connected to the FPGA module, and is used to receive the electrical FT3 protocol sent by the external DC transformer, and send the electrical FT3 protocol to the DC merging unit; the optical serial data transceiver module is connected to the FPGA module, and is used to receive the optical FT3 protocol sent by the external DC transformer, and send the optical FT3 protocol to the DC merging unit.

[0035] Furthermore, the serial data transceiver module can not only transmit and receive FT3 data protocol, but also transmit and receive timing signals such as PPS and IRIG-B code, and can automatically identify the type of the currently connected serial signal without human intervention.

[0036] Furthermore, the optical serial data receiving module uses the HFBR1414 transmitting optical module of Avago Corporation, and the HFBR1414 is connected to the logic control and processor of the FPGA module through SN74ACTQ00.

[0037] Furthermore, the optical serial data receiving module uses the HFBR2416 receiving optical module of Avago, and the bandwidth of up to 155Mb provides lower jitter and stability of optical signal pulses. As a key component of photoelectric signal conversion, the HFBR2416 is used to convert the received optical signal into an electrical signal for subsequent circuit processing and data recovery. The HFBR2416 is connected to the logic control and processor of the FPGA module through LT1016.

[0038] Furthermore, the electrical serial data transceiver module uses ADI's high-speed RS485 chip MAX22502E, which is a high-performance, low-power differential line driver and receiver chip with a communication rate of up to 100Mbps, a large receiver hysteresis, high noise suppression and better signal integrity, and an integrated pre-emphasis circuit that can extend the distance and increase the data rate of reliable communication by reducing inter-symbol interference (ISI). Specifically, the logic control and processor of the FPGA module are connected to the MAX22502E, which is connected to the outside through an RJ45 interface.

[0039] In a specific embodiment, the FPGA processing chip uses the zynq-7020 of the Zynq series of Xilinx's scalable processing platform, which integrates a dual-core Cortex-A9 processor system (Processing System, PS) based on the ARM architecture with a flexible programmable logic (Programmable Logic, PL) structure based on field programmable gate array (Field-Programmable Gate Array, FPGA) technology; integrated The software programmability of the processor and the hardware programmability of the FPGA can not only realize important analysis and hardware acceleration, but also highly integrate CPU, DSP, ASSP and mixed signal functions on a single device. The switch quantity module includes a binary input module and a binary output module.

[0040] In a specific embodiment, the 5G communication module is connected to the FPGA module via a PCIE interface, and the FPGA module implements the settings of the 5G communication module via a UART interface.

[0041] Furthermore, the 5G communication module uses Quectel Communications' 5G module RG520N, which is a 5G Sub-6 GHz module designed for loT / Embb applications. The module adopts 3GPP Rel-16 technology, with a maximum downlink rate of 3.4Gbps and a maximum uplink rate of 900Mbps. It supports 5G NSA and SA modes, is backward compatible with 4G / 3G, and has Qualcomm's advanced IZat positioning technology (Gen9VT), integrated multi-constellation high-precision positioning GNSS receivers, supports GPS, Beidou, GLONASS and other positioning technologies, and can achieve faster, more accurate and more reliable positioning.

[0042] In a specific embodiment, the switch quantity module includes a binary input quantity module and a binary output quantity module, which are connected to the FPGA module. Specifically, the logic control and processor of the FPGA module are connected to the LM393 through a first optical coupler isolator, and the logic control and processor of the FPGA module are connected to the MOS tube through a second optical coupler processor.

[0043] The utility model proposes an FPGA-based DC distribution network tester, which adopts a more compact and integrated design. Compared with existing products, it has richer interfaces and can receive not only optical FT3 but also RS485 level type electrical FT3. It is compatible with a variety of FT3 protocols and custom protocols and has 5G communication capabilities. It can realize remote control and data transmission. The overall structure is more compact and convenient to carry, and the power consumption is low, without the problem of high heat generation of the separate CPU.

[0044] See also Figure 2 and Figure 3 In another embodiment of the present application, a distribution network test device is provided, including the FPGA-based DC distribution network tester, a DC transformer and a DC merging unit; the DC transformer and the DC merging unit are connected to the DC distribution network tester.

[0045] The FPGA-based DC distribution network tester includes a human-computer interaction module, a serial data transceiver module, an FPGA module, a 5G communication module and a switch quantity module;

[0046] The human-computer interaction module is connected to the LVDS interface of the FPGA module, and touch control is realized through the IIC interface of the FPGA module;

[0047] The serial data transceiver module includes an electrical serial data transceiver module and an optical serial data transceiver module, which are used to receive the FT3 protocol sent by the external DC transformer; the electrical serial data transceiver module is connected to the FPGA module, which is used to receive the electrical FT3 protocol sent by the external DC transformer, and send the electrical FT3 protocol to the DC merging unit; the optical serial data transceiver module is connected to the FPGA module, which is used to receive the optical FT3 protocol sent by the external DC transformer, and send the optical FT3 protocol to the external DC merging unit;

[0048] The 5G communication module is connected to the PCIE interface of the FPGA module;

[0049] The switch quantity module is connected to the FPGA module.

[0050] It can be understood that in the absence of a tester, the DC transformer and the DC merging unit are directly connected, and the data flow is that the DC transformer outputs data to the DC merging unit; when the DC distribution network tester of the utility model is used to test the DC transformer and the DC merging unit, the distribution network test is achieved by performing message data integrity test, message discreteness test and corresponding channel data interpolation comparison test.

[0051] It should be noted that, in this specification, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0052] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0053] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A DC distribution network tester based on FPGA, characterized in that: Including human-computer interaction module, serial data transceiver module, FPGA module, 5G communication module and switch quantity module; The human-computer interaction module is connected to the LVDS interface of the FPGA module, and touch control is realized through the IIC interface of the FPGA module; The serial data transceiver module includes an electrical serial data transceiver module and an optical serial data transceiver module, which are used to receive the FT3 protocol sent by an external DC transformer; The electrical serial data transceiver module is connected to the FPGA module, and is used to receive the electrical FT3 protocol sent by the external DC transformer, and send the electrical FT3 protocol to the DC merging unit; The optical serial data transceiver module is connected to the FPGA module, and is used to receive and transmit the optical FT3 protocol sent by the external DC transformer, and send the optical FT3 protocol to the external DC merging unit; The 5G communication module is connected to the PCIE interface of the FPGA module; The switch quantity module is connected to the FPGA module.

2. According to the FPGA-based DC distribution network tester of claim 1, it is characterized in that: The FPGA module is used to use the local clock reference according to the parameters set by the human-computer interaction module; or to adjust the local clock reference according to the synchronization pulse received from the serial data transceiver module.

3. The FPGA-based DC distribution network tester according to claim 1, characterized in that: The serial data transceiver module is used to, after receiving the FT3 protocol sent by the external DC transformer, add the current serial port sequence number and timestamp information to the FT3 protocol, and send it to the 5G communication module or the human-computer interaction module through the PCIE interface of the FPGA module.

4. The FPGA-based DC distribution network tester according to claim 1, characterized in that: The human-computer interaction module adopts an LCD display screen.

5. The FPGA-based DC distribution network tester according to claim 1, characterized in that: The optical serial data transceiver module adopts the HFBR2416 transceiver.

6. The FPGA-based DC distribution network tester according to claim 1, characterized in that: The electrical serial data transceiver module adopts a MAX22502E receiver.

7. The FPGA-based DC distribution network tester according to claim 1, characterized in that: The FPGA module adopts Zynq series chips.

8. The FPGA-based DC distribution network tester according to claim 1, characterized in that: The 5G communication module adopts RG520N.

9. The FPGA-based DC distribution network tester according to claim 1, characterized in that: The switch quantity module comprises a binary input quantity module and a binary output quantity module, and both the binary input quantity module and the binary output quantity module are connected to the FPGA module.

10. A distribution network testing device, characterized in that: It comprises the FPGA-based DC distribution network tester, DC transformer and DC merging unit as described in any one of claims 1 to 9; the DC transformer and DC merging unit are connected to the DC distribution network tester.

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