A DC power supply information acquisition and synthesis device

Abstract

This invention belongs to the technical field of DC power supply information acquisition devices, specifically relating to a DC power supply information acquisition and synthesis device. The invention includes an embedded monitoring host connected to an acquisition and synthesis module. The embedded monitoring host includes: an upper-level monitoring device, a lower-level monitoring device, a main control chip, and a display device. The acquisition and synthesis module includes: an AC input voltage acquisition module, a DC voltage and current acquisition module, a switch quantity acquisition module, a fault hard contact output module, and a communication module. The AC input voltage acquisition module, DC voltage and current acquisition module, switch quantity acquisition module, and fault hard contact output module are each connected to the communication module. The communication module is connected to both the upper-level and lower-level monitoring devices. This invention features a simple structure, convenient wiring, high integration, stable performance, good scalability, and low cost.

Description

Technical Field

[0001] This invention belongs to the technical field of DC power supply information acquisition devices, and specifically relates to a DC power supply information acquisition and synthesis device. Background Technology

[0002] With the increase in substation capacity and the greater dispersion of loads, the monitoring requirements of DC systems are becoming increasingly complex.

[0003] Existing DC power information acquisition devices employ multiple independent acquisition modules, such as AC input voltage acquisition modules, DC voltage and current acquisition modules, and switch quantity acquisition modules. These modules are connected in parallel to an embedded monitoring host via RS485 communication. This approach leads to a surge in the number of modules, often requiring more than ten. The wiring process is cumbersome, with a large number of communication and power lines, not only occupying significant space but also increasing construction costs and maintenance difficulty. Furthermore, communication speed between modules is limited, and the failure rate increases significantly with the number of modules, affecting the overall system reliability. In existing technologies, the dispersed module functions and low integration have become bottlenecks restricting the intelligent development of DC systems, necessitating a solution that can integrate multiple acquisition functions, simplify the architecture, and improve efficiency. Summary of the Invention

[0004] To address the problems of complex structure, cumbersome wiring, low integration, poor scalability, and high cost of existing DC power information acquisition devices, this invention proposes a DC power information acquisition and synthesis device, comprising: an embedded monitoring host, which is connected to an acquisition and synthesis module;

[0005] The embedded monitoring host includes: an upper-level monitoring device, a lower-level monitoring device, a main control chip U1, and a display device; the upper-level monitoring device, the lower-level monitoring device, and the display device are respectively connected to the main control chip U1; the display device is used to display the DC voltage and current, AC voltage and current, switch status, and fault alarm signals of the DC power supply device in real time.

[0006] According to the DC power supply information acquisition and synthesis device described above, the acquisition and synthesis module includes: an AC input voltage acquisition module, a DC voltage and current acquisition module, a switch quantity acquisition module, a fault hard contact output module, and a communication module; the AC input voltage acquisition module, the DC voltage and current acquisition module, the switch quantity acquisition module, and the fault hard contact output module are respectively connected to the communication module; the communication module is respectively connected to the upper-level monitoring device and the lower-level monitoring device.

[0007] The AC input voltage acquisition module includes: an AC input voltage chip; an AC input voltage terminal module connected to the AC input voltage chip; and an AC input voltage terminal module connected to the AC voltage and current signals of a DC power supply device.

[0008] The DC voltage and current acquisition module includes: a DC voltage and current chip; the DC voltage and current chip is connected to a DC voltage and current terminal module; and the DC voltage and current terminal module is connected to the DC voltage and current signal of the DC power supply device.

[0009] The switch quantity acquisition module includes: a switch quantity acquisition chip; the switch quantity acquisition chip is connected to an optocoupler isolation module; the optocoupler isolation module is connected to a switch status terminal module; and the switch status terminal module is connected to the switch status signal of the DC power supply device.

[0010] The fault hard contact output module includes: a relay module; a relay module connected to a fault hard contact terminal module; a relay module connected to a fault alarm signal from a DC power supply device; and a relay module connected to a switch quantity acquisition chip.

[0011] According to the DC power information acquisition and synthesis device described above, a conditioning circuit module and an AC analog-to-digital converter are connected between the AC input voltage terminal module and the AC input terminal of the AC input voltage acquisition module; the conditioning circuit module includes an operational amplifier; the operational amplifier is connected to the AC analog-to-digital converter.

[0012] According to the DC power information acquisition and synthesis device described above, a Hall sensor module and a DC-DC analog-to-digital converter are connected between the DC voltage and current chip of the DC voltage and current acquisition module and the DC voltage and current terminal module; the Hall sensor module includes a differential amplifier circuit module; the differential amplifier circuit module is connected to the DC-DC analog-to-digital converter.

[0013] According to the DC power supply information acquisition and synthesis device described above, the AC input voltage terminal module includes AC input voltage terminals PX1 / BT1-PX8 / BT8; AC input voltage terminals PX1 / BT1-PX4 / BT4 are respectively connected to the first AC voltage contact 1A, the first AC voltage contact 1B, the first AC voltage contact 1C, and the first AC voltage contact 1IN of the AC voltage and current signal of the DC power supply device; AC input voltage terminals PX5 / BT5-PX8 / BT8 are respectively connected to the second AC voltage contact 2A, the second AC voltage contact 2B, the second AC voltage contact 2C, and the second AC voltage contact 2IN of the AC voltage and current signal of the DC power supply device.

[0014] According to the DC power information acquisition and synthesis device described above, the DC voltage and current terminal module includes DC voltage and current terminals P01 / AT1-P08 / AT8; the DC voltage and current terminals P01 / AT1-P08 / AT8 are sequentially connected to the first voltage positive and negative terminals V1±, the second voltage positive and negative terminals V2±, the first current positive and negative terminals I1±, and the second current positive and negative terminals I2± of the DC voltage and current signals of the DC power supply device.

[0015] According to the DC power supply information acquisition and synthesis device described above, the optocoupler isolation module includes optocouplers G1-G6; the switch status terminal module includes switch status terminals PZ1 / ZT1-PZ24 / ZT24; optocouplers G1-G8 are sequentially connected to switch status signals PZ1 / ZT1-PZ4 / ZT4, switch status signals PZ5 / ZT5-PZ8 / ZT8, switch status signals PZ9 / ZT9-PZ12 / ZT12, switch status signals PZ13 / ZT13-PZ16 / ZT16, switch status signals PZ17 / ZT17-PZ20 / ZT20, and switch status signals PZ21 / ZT21-PZ24 / ZT24; and switch status terminals PZ1 / ZT1-PZ24 / ZT24 are sequentially connected to the switch status signals K1-K24 of the DC power supply device.

[0016] According to the DC power supply information acquisition and synthesis device described above, the relay module includes: relays J1-J6; the fault hard contact terminal module includes: fault hard contact terminals PF1 / FT1-PF12 / FT12; relays J1-J6 are sequentially connected to fault hard contact terminals PF1 / FT1-PF2 / FT2, fault hard contact terminals PF3 / FT3-PF4 / FT4, fault hard contact terminals PF5 / FT5-PF6 / FT6, fault hard contact terminals PF7 / FT7-PF8 / FT8, fault hard contact terminals PF9 / FT9-PF10 / FT10, and fault hard contact terminals PF11 / FT11-PF12 / FT12; fault hard contact terminals PF1 / FT1-PF12 / FT12 are sequentially connected to fault alarm signals GZ1-GZ6 of the DC power supply device.

[0017] According to the DC power information acquisition and synthesis device described above, the acquisition and synthesis module includes an isolation power supply module that converts an external 24V power supply into a 5V isolation voltage. The isolation power supply module is connected to an AC input voltage acquisition module, a DC voltage and current acquisition module, a switch quantity acquisition module, and a fault hard contact output module, respectively.

[0018] According to the DC power information acquisition and synthesis device described above, the communication protocol between the embedded monitoring host and the acquisition and synthesis module is Modbus RTU, and the main control chip U1 is STM32F407VGT6; the communication module includes a communication chip: the communication chip model is MAX485ESA; the communication chip is connected to the upper-level monitoring device and the lower-level monitoring device through the first communication terminal 1RS485 and the second communication terminal 2RS485 respectively.

[0019] The beneficial effects of the present invention are as follows:

[0020] 1. This invention integrates an AC input voltage acquisition module, a DC voltage and current acquisition module, a switch quantity acquisition module, a fault hard contact output module, and a communication module into a single acquisition and synthesis module, significantly reducing the number of modules and optimizing the device structure. Only a single communication line and power line are needed to connect the acquisition and synthesis module, reducing the number of cables and wiring complexity, simplifying wiring processes, and lowering construction costs.

[0021] 2. The data acquisition and synthesis module of this invention interacts with the embedded monitoring host through a unified communication interface, reducing the latency of parallel communication between multiple modules, improving operating efficiency, and increasing data transmission speed.

[0022] 3. The reduced number of modules in this invention lowers the risk of interface failure, while the integrated structure reduces external connection points, lowers the failure rate, and enhances system stability.

[0023] 4. The module of this invention is compact, reducing the space occupied by the equipment, saving space and cost, and reducing hardware procurement and maintenance costs.

[0024] 5. The embedded monitoring host of this invention supports multi-channel signal acquisition, such as two AC inputs, battery pack and bus parameters, enhancing scalability and adapting to future functional expansion needs. Attached Figure Description

[0025] Figure 1 This is a simplified structural diagram of a DC power supply information acquisition and synthesis device according to the present invention.

[0026] Figure 2 This is a simplified structural diagram of a current DC power supply information acquisition device.

[0027] Figure 3 This is a schematic diagram of the structure of a DC power supply information acquisition and synthesis device according to the present invention. Detailed Implementation

[0028] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0029] like Figure 1 , Figure 3 As shown: A DC power supply information acquisition and synthesis device includes: an embedded monitoring host 100, and an acquisition and synthesis module 300 connected to the embedded monitoring host 100.

[0030] The embedded monitoring host 100 includes: an upper-level monitoring device 110, a lower-level monitoring device 120, a main control chip U1, and a display device 130; the upper-level monitoring device 110, the lower-level monitoring device 120, and the display device 130 are respectively connected to the main control chip U1; the display device 110 is used to display the DC voltage and current, AC voltage and current, switch status, and fault alarm signals of the DC power supply device in real time.

[0031] The data acquisition and synthesis module 300 includes: an AC input voltage acquisition module 310, a DC voltage and current acquisition module 320, a digital input acquisition module 330, a fault hard contact output module 340, and a communication module 350; the AC input voltage acquisition module 310, the DC voltage and current acquisition module 320, the digital input acquisition module 330, and the fault hard contact output module 340 are respectively connected to the communication module 350; the communication module 350 is respectively connected to the upper-level monitoring device 110 and the lower-level monitoring device 120;

[0032] The AC input voltage acquisition module 310 includes: an AC input voltage chip 311; the AC input voltage chip 311 is connected to an AC input voltage terminal module; the AC input voltage terminal module is connected to the AC voltage and current signals of the DC power supply device.

[0033] The DC voltage and current acquisition module 320 includes: a DC voltage and current chip 321; the DC voltage and current chip 321 is connected to a DC voltage and current terminal module 322; the DC voltage and current terminal module is connected to the DC voltage and current signal of the DC power supply device.

[0034] The switch quantity acquisition module 330 includes: a switch quantity acquisition chip 331; the switch quantity acquisition chip 331 is connected to an optocoupler isolation module; the optocoupler isolation module is connected to a switch status terminal module; and the switch status terminal module is connected to the switch status signal of the DC power supply device.

[0035] The fault hard contact output module 340 includes: a relay module; the relay module is connected to the fault hard contact terminal module; the relay module 341 is connected to the fault alarm signal of the DC power supply device; and the relay module is connected to the switch quantity acquisition chip 331.

[0036] The AC input voltage acquisition module 310 has a conditioning circuit module and an AC analog-to-digital converter connected between its AC input voltage terminal module and AC input terminal; the conditioning circuit module includes an operational amplifier; the operational amplifier is connected to the AC analog-to-digital converter.

[0037] The DC voltage and current acquisition module 320 has a DC voltage and current chip 321 connected to the DC voltage and current terminal module, and a Hall sensor module and a DC-DC converter are connected between them. The Hall sensor module includes a differential amplifier circuit module, which is connected to the DC-DC converter.

[0038] The AC input voltage terminal module includes AC input voltage terminals PX1 / BT1-PX8 / BT8; AC input voltage terminals PX1 / BT1-PX4 / BT4 are respectively connected to the first AC voltage contact 1A, first AC voltage contact 1B, first AC voltage contact 1C, and first AC voltage contact 1IN of the AC voltage and current signal of the DC power supply device; AC input voltage terminals PX5 / BT5-PX8 / BT8 are respectively connected to the second AC voltage contact 2A, second AC voltage contact 2B, second AC voltage contact 2C, and second AC voltage contact 2IN of the AC voltage and current signal of the DC power supply device.

[0039] The DC voltage and current terminal module includes DC voltage and current terminals P01 / AT1-P08 / AT8; the DC voltage and current terminals P01 / AT1-P08 / AT8 are connected in sequence to the first voltage positive and negative terminals V1±, the second voltage positive and negative terminals V2±, the first current positive and negative terminals I1±, and the second current positive and negative terminals I2± of the DC voltage and current signals of the DC power supply device.

[0040] The optocoupler isolation module includes optocouplers G1-G6; the switch status terminal module includes switch status terminals PZ1 / ZT1-PZ24 / ZT24; optocouplers G1-G8 are sequentially connected to switch status signals PZ1 / ZT1-PZ4 / ZT4, switch status signals PZ5 / ZT5-PZ8 / ZT8, switch status signals PZ9 / ZT9-PZ12 / ZT12, switch status signals PZ13 / ZT13-PZ16 / ZT16, switch status signals PZ17 / ZT17-PZ20 / ZT20, and switch status signals PZ21 / ZT21-PZ24 / ZT24; switch status terminals PZ1 / ZT1-PZ24 / ZT24 are sequentially connected to the switch status signals K1-K24 of the DC power supply device.

[0041] The relay module includes: relays J1-J6; the fault hard contact terminal module includes: fault hard contact terminals PF1 / FT1-PF12 / FT12; relays J1-J6 are sequentially connected to fault hard contact terminals PF1 / FT1-PF2 / FT2.

[0042] The fault hard contact terminals PF3 / FT3 –PF4 / FT4, PF5 / FT5 –PF6 / FT6, PF7 / FT7 –PF8 / FT8, PF9 / FT9 –PF10 / FT10, and PF11 / FT11 –PF12 / FT12 are connected in sequence to the fault alarm signals GZ1-GZ6 of the DC power supply device.

[0043] The data acquisition and synthesis module 300 includes an isolation power supply module 360, which converts the external 24V power supply into a 5V isolation voltage. The isolation power supply module 360 ​​is connected to the AC input voltage acquisition module 310, the DC voltage and current acquisition module 320, the switch quantity acquisition module 330, and the fault hard contact output module 340, respectively.

[0044] The communication protocol between the embedded monitoring host 100 and the acquisition and synthesis module 300 is Modbus RTU, and the main control chip U1 is STM32F407VGT6; the communication module 350 includes a communication chip 351: the communication chip 351 is MAX485ESA; the communication chip 351 is connected to the upper-level monitoring device 110 and the lower-level monitoring device 120 through the first communication terminal 1RS485 and the second communication terminal 2RS485 respectively.

[0045] The DC power supply information acquisition and synthesis device of the present invention consists of an embedded monitoring host 100 and an acquisition and synthesis module 300, which are described in detail below with reference to the accompanying drawings:

[0046] like Figure 3 As shown, the data acquisition and synthesis module 300 is connected to the embedded monitoring host 100 via an RS485 communication line, and is also connected to an independent 24V isolated power supply module 360. The input terminals of the data acquisition and synthesis module 300 are respectively connected to the AC input voltage sensor, the DC charger voltage and current sensor, the battery pack sensor, and the switch signal. The output terminal is connected to the fault alarm signals GZ1-GZ6 of the DC power supply device through the fault hard contact output module 340.

[0047] Functionality

[0048] Data acquisition: The AC input voltage of the DC power supply is converted by a voltage divider circuit and an ADC, and then processed by the acquisition and synthesis module 300.

[0049] The DC voltage and current of the DC power supply device are acquired by a Hall sensor and sent to the acquisition and synthesis module 300 after signal conditioning circuit;

[0050] The switch position signal of the DC power supply device is input to the acquisition and synthesis module 300 after being isolated by an optocoupler.

[0051] Communication and display:

[0052] The data acquisition and synthesis module 300 periodically uploads data to the embedded monitoring host 100 via RS485 using the Modbus protocol.

[0053] After the embedded monitoring host 100 parses the data, the display device 130 displays the DC voltage and current, AC voltage and current, switch status and fault alarm signals of the DC power supply device in real time.

[0054] Fault handling: When a fault alarm signal of the DC power supply device is detected, the acquisition and synthesis module 300 triggers relays J1-J6, and the fault hard contact output module 340 connects to the fault alarm signal GZ1-GZ6 of the DC power supply device, and the DC power supply information acquisition and synthesis device issues an audible and visual alarm.

[0055] like Figure 2 As shown, the existing DC power information acquisition device requires multiple module units: AC voltage acquisition unit 2, DC voltage power acquisition unit 3, first switch status acquisition unit 4 and second switch status acquisition unit 5 are connected in parallel and are respectively connected to the monitoring host 1, which makes the wiring complicated.

[0056] like Figure 3 As shown, this invention only requires the embedded monitoring host 100 to connect to the acquisition and synthesis module 300, reducing cables by more than 60% and improving installation efficiency.

[0057] After adopting this device, the number of data acquisition modules in a 110kV substation was reduced from 12 to 1, the communication failure rate decreased by 80%, the construction period was shortened by 40%, and the overall cost was reduced by 35%.

[0058] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A DC power supply information acquisition and synthesis device, characterized in that, Including: An embedded monitoring host (100), and the embedded monitoring host (100) is connected to an acquisition and synthesis module (300); The embedded monitoring host (100) includes: a superior monitoring device (110), an inferior monitoring device (120), a main control chip U1, and a display device (130); the superior monitoring device (110), the inferior monitoring device (120), and the display device (130) are respectively connected to the main control chip U1; the display device (130) is used to display in real time the DC voltage and current, AC voltage and current, switch status, and fault alarm signal of the DC power supply device; the acquisition and synthesis module (300) includes: an AC incoming line voltage acquisition module (310), a DC voltage and current acquisition module (320), a digital input module (330), a fault hard contact output module (340), and a communication module (350); the AC incoming line voltage acquisition module (310), the DC voltage and current acquisition module (320), the digital input module (330), and the fault hard contact output module (340) are respectively connected to the communication module (350); the communication module (350) is respectively connected to the superior monitoring device (110) and the inferior monitoring device (120); The AC incoming line voltage acquisition module (310) includes: an AC incoming line voltage chip (311); the AC incoming line voltage chip (311) is connected to an AC incoming line voltage terminal module; the AC incoming line voltage terminal module is connected to the AC voltage and current signal of the DC power supply device; The DC voltage and current acquisition module (320) includes: a DC voltage and current chip (321); the DC voltage and current chip (321) is connected to a DC voltage and current terminal module (322); the DC voltage and current terminal module is connected to the DC voltage and current signal of the DC power supply device; The digital input module (330) includes: a digital input chip (331); the digital input chip (331) is connected to an opto-isolation module; the opto-isolation module is connected to a switch status terminal module; the switch status terminal module is connected to the switch status signal of the DC power supply device; The fault hard contact output module (340) includes: a relay module; the relay module is connected to a fault hard contact terminal module; the relay module (341) is connected to the fault alarm signal of the DC power supply device; the relay module is connected to the digital input chip (331).

2. The DC power supply information acquisition and synthesis device according to claim 1, characterized in that, There is a conditioning circuit module and an AC analog-to-digital converter connected between the AC incoming line voltage terminal module of the AC incoming line voltage acquisition module (310) and the AC input terminal; the conditioning circuit module includes an operational amplifier; the operational amplifier is connected to the AC analog-to-digital converter.

3. The DC power supply information acquisition and synthesis device according to claim 2, characterized in that, There is a Hall sensor module and a DC analog-to-digital converter connected between the DC voltage and current chip (321) of the DC voltage and current acquisition module (320) and the DC voltage and current terminal module; The Hall sensor module includes a differential amplification circuit module; the differential amplification circuit module is connected to the DC analog-to-digital converter.

4. A DC power supply information acquisition and synthesis device according to claim 3, characterized in that The AC input voltage terminal module includes AC input voltage terminals PX1 / BT1 - PX8 / BT8; the AC input voltage terminals PX1 / BT1 - PX4 / BT4 are respectively connected to the first AC voltage contacts 1A, 1B, 1C, 1IN of the AC voltage and current signals of the DC power supply device; the AC input voltage terminals PX5 / BT5 - PX8 / BT8 are respectively connected to the second AC voltage contacts 2A, 2B, 2C, 2IN of the AC voltage and current signals of the DC power supply device.

5. The DC power supply information acquisition and synthesis device according to claim 4, wherein The DC voltage and current terminal module includes DC voltage and current terminals P01 / AT1 - P08 / AT8; the DC voltage and current terminals P01 / AT1 - P08 / AT8 are sequentially and respectively connected to the first voltage positive and negative poles V1±, the second voltage positive and negative poles V2±, the first current positive and negative poles I1±, and the second current positive and negative poles I2± of the DC voltage and current signals of the DC power supply device.

6. The DC power supply information acquisition and synthesis device according to claim 5, wherein The optocoupler isolation module includes optocouplers G1 - G6; the switch state terminal module includes switch state terminals PZ1 / ZT1 - PZ24 / ZT24; the optocouplers G1 - G8 are sequentially connected to the switch state signals PZ1 / ZT1 - PZ4 / ZT4, the switch state signals PZ5 / ZT5 - PZ8 / ZT8, the switch state signals PZ9 / ZT9 - PZ12 / ZT12, the switch state signals PZ13 / ZT13 - PZ16 / ZT16, the switch state signals PZ17 / ZT17 - PZ20 / ZT20, and the switch state signals PZ21 / ZT21 - PZ24 / ZT24; The switch state terminals PZ1 / ZT1 - PZ24 / ZT24 are sequentially and respectively connected to the switch state signals K1 - K24 of the DC power supply device.

7. The DC power supply information acquisition and synthesis device according to claim 6, characterized in that, The relay module includes: relays J1 - J6; the fault hard contact terminal module includes: fault hard contact terminals PF1 / FT1 - PF12 / FT12; the relays J1 - J6 are sequentially connected to the fault hard contact terminals PF1 / FT1 - PF2 / FT2, the fault hard contact terminals PF3 / FT3 – PF4 / FT4, the fault hard contact terminals PF5 / FT5 – PF6 / FT6, the fault hard contact terminals PF7 / FT7 – PF8 / FT8, the fault hard contact terminals PF9 / FT9 – PF10 / FT10, and the fault hard contact terminals PF11 / FT11 – PF12 / FT12; the fault hard contact terminals PF1 / FT1 - PF12 / FT12 are sequentially and respectively connected to the fault alarm signals GZ1 - GZ6 of the DC power supply device.

8. The DC power supply information acquisition and synthesis device according to claim 7, wherein The acquisition and synthesis module (300) includes an isolated power supply module (360) that converts an external 24V power supply into a 5V isolated voltage. The isolated power supply module (360) is respectively connected to an AC incoming line voltage acquisition module (310), a DC voltage and current acquisition module (320), a digital input acquisition module (330), and a fault hard contact output module (340).

9. The DC power supply information acquisition and synthesis device according to claim 8, wherein The communication protocol between the embedded monitoring host (100) and the acquisition and synthesis module (300) is Modbus RTU, and the model of the main control chip U1 is STM32F407VGT6. The communication module (350) includes a communication chip (351): the model of the communication chip (351) is MAX485ESA; the communication chip (351) is connected to the upper-level monitoring device (110) and the lower-level monitoring device (120) through the first communication terminal 1RS485 and the second communication terminal 2RS485 respectively.

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