A switch quantity acquisition and synthesis device

Abstract

This invention belongs to the technical field of switch quantity acquisition devices, specifically relating to a switch quantity acquisition and synthesis device. The invention includes an embedded monitoring host, which establishes a bidirectional data connection with the switch quantity acquisition and synthesis module through a main communication module; the embedded monitoring host receives and parses the switch signals acquired by the switch quantity acquisition and synthesis module in real time; the embedded monitoring host is connected to a display module, which dynamically displays the open / closed status and alarm status of each switch; the embedded monitoring host transmits switch fault signals to a lower-level monitoring host through the main communication module; and a data processing unit, with a built-in analog-to-digital conversion circuit and protocol conversion chip, is connected to the embedded monitoring host through the main communication module. This invention features a simple structure, convenient wiring, high integration, high reliability, good scalability, and low cost.

Description

Technical Field

[0001] This invention belongs to the technical field of switch quantity acquisition devices, and specifically relates to a switch quantity acquisition and synthesis device. Background Technology

[0002] In integrated power supply systems of smart substations and non-smart substations, it is necessary to collect and monitor the switching status and alarm signals of AC, DC, communication and inverter subsystems in real time.

[0003] Existing digital input acquisition devices use 16-point input modules to acquire digital signals, and the number of modules is increased to meet the needs of multiple systems. However, the number of switches in each subsystem varies greatly; for example, a single AC system segment can have up to 23 channels. This results in a large number of modules, complex wiring, large installation space occupation, and high costs. Furthermore, customers often request hard-contact fault signal output modules, further increasing the variety of modules and system complexity. The communication and power connections between modules are cumbersome, increasing construction difficulty and potential for failure. Existing technologies struggle to balance flexibility, economy, and reliability, necessitating a highly integrated, scalable, and cost-optimized solution. Summary of the Invention

[0004] To address the problems of complex structure, cumbersome wiring, low integration, poor scalability, and high cost of existing switch quantity acquisition devices, this invention proposes a switch quantity acquisition and synthesis device, comprising:

[0005] The system includes an embedded monitoring host, a main communication module, and a switch quantity acquisition and synthesis module. The embedded monitoring host establishes a bidirectional data connection with the switch quantity acquisition and synthesis module through the main communication module. The embedded monitoring host receives and processes the switch quantity signals of the switch to be acquired by the switch quantity acquisition and synthesis module in real time. The embedded monitoring host is connected to a display module, which dynamically displays the open / closed status and alarm status of the switch to be acquired. The embedded monitoring host is also connected to a lower-level monitoring host through the main communication module.

[0006] The digital input acquisition and synthesis module includes: an optocoupler isolation input module, each of which supports the input of the status signal of the switch to be acquired, for acquiring the open / closed status and alarm status of the switch to be acquired;

[0007] The digital input acquisition and synthesis module also includes: a data processing unit, which has a built-in analog-to-digital conversion circuit and a protocol conversion chip, and is connected to the embedded monitoring host through a main communication module; the data processing unit is connected to a relay module, which includes normally open / normally closed contacts, and the normally open / normally closed contacts are optically isolated to output fault signals according to the instructions of the embedded monitoring host; the data processing unit is connected to a power supply module, which provides independent DC power and is isolated from the power supply of the embedded monitoring host.

[0008] According to the above-described switch quantity acquisition and synthesis device, the main communication module includes a communication interface and a downlink communication module; the communication interface is connected to the embedded monitoring host; the downlink communication module is connected to the lower-level monitoring host;

[0009] The optocoupler isolation input module includes 64 optocouplers; each of the 64 optocouplers is connected to a data processing unit; and each optocoupler is connected to a switch status signal via one of the 64 switch status signal ports.

[0010] The relay output module includes 8 relays; each of the 8 relays is connected to the data processing unit; and each of the 8 relays is connected to a fault output signal in sequence through a fault output signal port.

[0011] According to the aforementioned switch quantity acquisition and synthesis device, the embedded monitoring host and the switch quantity acquisition and synthesis module are connected via an RS-485 bus of model ADM2587E, and data is transmitted using the MODBUS RTU protocol; the RS-485 bus uses BELDEN 9841 twisted-pair shielded cable, with the shield grounded at one end, a transmission distance ≤1200 meters, and a baud rate configured as follows.

[0012] 9600 / 19200 / 38400bps; the embedded monitoring host has a built-in ARM Cortex-M7 processor, model STM32H743.

[0013] According to the above-described switch quantity acquisition and synthesis device, the power supply module of the switch quantity acquisition and synthesis module adopts a DC 24V TDK-Lambda GXS2124 isolated power supply with an input voltage range of 18-36V and ripple noise ≤50mV; the communication interface has a built-in RS-485 isolation chip of model ADM2587E, which supports ±15kV ESD protection and 4kV electrical isolation.

[0014] According to the above-described switch quantity acquisition and synthesis device, the switch quantity acquisition and synthesis module can be cascaded with I / O16-0 type switch quantity input modules, model SI16-0, with a cascade quantity of ≤4 and a total number of input points of ≤128.

[0015] According to the above-mentioned switch quantity acquisition and synthesis device, one switch quantity acquisition and synthesis module and one I / O16-0 module are cascaded. The cascaded modules are connected through an AMP 5-554720-3RJ45 interface. The cable is a CAT5e twisted pair cable, and the transmission distance is ≤50 meters.

[0016] According to the above-mentioned switch quantity acquisition and synthesis device, two switch quantity acquisition and synthesis modules are cascaded and the bus load capacity is expanded through an RS-485 repeater of model MAX1480EPA.

[0017] According to the aforementioned switch quantity acquisition and synthesis device, the device is mounted on a DIN35 rail, and the modules are connected via a PTFIX 6 / 6 combination terminal block; the input signal cable is 0.5mm². 2 Model: BELDEN 8760 shielded cable.

[0018] According to the above-described switch quantity acquisition and synthesis device, each optocoupler isolation channel of the optocoupler isolation input module includes a high-speed optocoupler of model PC817X1 with a response time ≤1ms and an insulation withstand voltage ≥5000Vrms; the relay contacts of the relay module adopt G5V-2 type relays.

[0019] According to the above-described switch quantity acquisition and synthesis device, the data processing unit has a built-in 16-bit analog-to-digital converter of model ADS1115 and a protocol conversion chip of model WCH CH438Q, with a sampling rate ≥1kSPS; the embedded monitoring host supports the IEC 61850 protocol stack.

[0020] The beneficial effects of the present invention are as follows:

[0021] 1. This invention develops a switch quantity acquisition and synthesis module that integrates 64 switch status signal input ports and 8 pairs of fault output signal ports, significantly reducing the number of modules and wiring complexity. For small- to medium-sized subsystems, such as communication systems and inverter systems, only a single module is needed to meet the acquisition requirements, saving more than 80% of the module usage. For large-scale systems, such as those with 65-80 switch status signal input ports, modules can be stacked and combined for flexible expansion.

[0022] 2. This invention integrates an independent power supply module and a communication interface, reducing external wiring and lowering the failure rate.

[0023] 3. This invention's embedded monitoring host provides unified data management, improving communication efficiency and response speed. The overall solution simplifies the construction process, saves installation space, reduces equipment costs and maintenance difficulty, and meets the State Grid's requirements for high efficiency, reliability, and economy in intelligent integrated power systems. Attached Figure Description

[0024] Figure 1 This is a simplified structural diagram of a switch quantity acquisition and synthesis device according to the present invention.

[0025] Figure 2 This is a simplified structural diagram of a current-technical switch quantity acquisition device.

[0026] Figure 3 This is a schematic diagram of the structure of a switch quantity acquisition and synthesis device according to the present invention. Detailed Implementation

[0027] 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.

[0028] like Figure 1 , Figure 3 As shown, a switch quantity acquisition and synthesis device according to this embodiment includes: an embedded monitoring host 100, a main communication module 101, and a switch quantity acquisition and synthesis module 200. The embedded monitoring host 100 establishes a bidirectional data connection with the switch quantity acquisition and synthesis module 200 through the main communication module 101. The embedded monitoring host 100 receives and processes the switch quantity signals of the switch to be acquired by the switch quantity acquisition and synthesis module 200 in real time. The embedded monitoring host 100 is connected to a display module 102, which dynamically displays the open / closed state and alarm state of the switch to be acquired. The embedded monitoring host 100 is connected to a lower-level monitoring host 300 through the main communication module 101.

[0029] The switch quantity acquisition and synthesis module 200 includes: an optocoupler isolation input module 201, each optocoupler isolation input module 201 supporting the input of the status signal of the switch to be acquired, used to acquire the open / closed status and alarm status of the switch to be acquired;

[0030] The switch quantity acquisition and synthesis module 200 further includes: a data processing unit 203, which has a built-in analog-to-digital conversion circuit and a protocol conversion chip. The data processing unit 203 is connected to the embedded monitoring host 100 through the main communication module 101. The data processing unit 203 is connected to a relay module 202, which includes normally open / normally closed relay contacts. The normally open / normally closed relay contacts are optically isolated and output fault signals according to the instructions of the embedded monitoring host 100. The data processing unit 203 is connected to a power supply module 205, which provides independent DC power and is isolated from the power supply of the embedded monitoring host 100.

[0031] The main communication module 101 includes a communication interface 204 and a downlink communication module 103; the communication interface 204 is connected to the embedded monitoring host 100; the downlink communication module 103 is connected to the lower-level monitoring host 300.

[0032] The optocoupler isolation input module 201 includes 64 optocouplers O1-O65; the 64 optocouplers O1-O65 are respectively connected to the data processing unit 203; the optocouplers O1-O65 are respectively connected to the switch status signals IN1-IN64 through 64 switch status signal ports PZ1 / ZT1-PZ64 / ZT64.

[0033] The relay output module 202 includes eight relays J1-J8; the eight relays J1-J8 are respectively connected to the data processing unit 203; the eight relays J1-J8 are sequentially connected to fault output signals OUT1-OUT8 through fault output signal ports PF1 / FT1-PF16 / FT16.

[0034] The embedded monitoring host 100 and the switch quantity acquisition and synthesis module 200 are connected via an RS-485 bus (model ADM2587E) and transmit data using the MODBUS RTU protocol. The RS-485 bus uses BELDEN 9841 twisted-pair shielded cable, with the shield grounded at one end, and the transmission distance is [not specified].

[0035] ≤1200 meters, baud rate configuration is 9600 / 19200 / 38400bps; the embedded monitoring host 100 has a built-in ARM Cortex-M7 processor, model STM32H743.

[0036] The power supply module 205 of the digital input acquisition and synthesis module 200 adopts a DC 24V TDK-Lambda GXS2124 isolated power supply with an input voltage range of 18-36V and ripple noise ≤50mV; the communication interface 204 has a built-in RS-485 isolation chip of model ADM2587E, which supports ±15kV ESD protection and 4kV electrical isolation.

[0037] The 200-type digital input acquisition and synthesis module can be cascaded with I / O 16-0 type digital input modules, model SI16-0, with a cascading quantity of ≤4 and a total number of input points of ≤128.

[0038] For the integrated power supply subsystem with 65-80 points of switches to be acquired, one switch quantity acquisition and synthesis module 200 and one I / O16-0 module are cascaded together, with addresses set to 1 and 2 respectively. The cascaded modules are connected through an AMP 5-554720-3RJ45 interface, and the cable is a CAT5e twisted pair cable with a transmission distance of ≤50 meters.

[0039] For the integrated power supply subsystem with 81-128 points, two switch quantity acquisition and synthesis modules are cascaded together (200), and the bus load capacity is expanded through an RS-485 repeater of model MAX1480EPA.

[0040] The device is mounted on a DIN35 rail, and modules are connected via PTFIX 6 / 6 combination terminal blocks; the input signal cable is 0.5mm². 2 Model: BELDEN 8760 shielded cable.

[0041] Each optocoupler isolation channel of the optocoupler isolation input module 201 includes a high-speed optocoupler of model PC817X1 with a response time ≤1ms and insulation withstand voltage ≥5000Vrms; the relay contacts of the relay module 202 adopt G5V-2 type relays.

[0042] The data processing unit 203 has a built-in 16-bit analog-to-digital converter (ADS1115) and a protocol conversion chip (WCH CH438Q), with a sampling rate ≥1kSPS; the embedded monitoring host 100 supports the IEC 61850 protocol stack for seamless integration with the substation backend system.

[0043] like Figure 1 , Figure 3 As shown:

[0044] A switch quantity acquisition and synthesis device consists of an embedded monitoring host 100 and a switch quantity acquisition and synthesis module 200.

[0045] like Figure 2As shown: Taking the integrated AC subsystem for data acquisition as an example, the integrated AC subsystem includes two feeder switches, totaling 46 channels. Existing switch quantity acquisition devices require three 16-channel input modules: the first acquisition device 11, the second acquisition device 12, the third acquisition device 13, and a hard contact fault output device 14, which are respectively connected to the monitoring host 1. However, this device only requires one switch quantity acquisition and synthesis module 200. The switch quantity acquisition and synthesis module 200 is connected to the embedded monitoring host 100 through the communication interface 204. The optocoupler isolation input module 201 includes 64 optocouplers O1-O65. The 64 optocouplers O1-O65 are respectively connected to the data processing unit 203. The optocouplers O1-O65 are respectively connected to the switch status signals IN1-IN64 through the 64 switch status signal ports PZ1 / ZT1-PZ64 / ZT64. The relay output module 202 includes 8 relays J1-J8. The 8 relays J1-J8 are respectively connected to the data processing unit 203. The 8 relays J1-J8 are respectively connected to the fault output signals OUT1-OUT8 through the fault output signal ports PF1 / FT1-PF16 / FT16.

[0046] The input voltage range is DC 24V±20%, and overvoltage protection is supported. The power supply module 205 is independently designed to avoid interference with the communication interface 204. The fault output signal ports PF1 / FT1-PF16 / FT16 are controlled by the data processing unit 203. For example, when a switch malfunction is detected, the corresponding fault output signals OUT1-OUT8 are triggered to close.

[0047] Extended Application: For an 80-point integrated AC subsystem, a combination of one switch quantity acquisition and synthesis module 200 and one 16-input module is used, with the two modules distinguished by address encoding. The embedded monitoring host 100 identifies each module and integrates the data, while the display module 102 displays the switch status of each integrated AC subsystem.

[0048] Implementation advantages: Compared with existing switch quantity acquisition devices, the number of modules is reduced by 75%, the wiring length is shortened by 60%, and the installation space is saved by 50%. Actual tests show that the system response time is ≤50ms and the failure rate is reduced by 40%. This device has been applied to multiple substation projects, verifying its reliability and economy.

[0049] 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 switching quantity sampling composition device, characterized by, include: The system comprises an embedded monitoring host (100), a main communication module (101), and a switch quantity acquisition and synthesis module (200). The embedded monitoring host (100) establishes a bidirectional data connection with the switch quantity acquisition and synthesis module (200) through the main communication module (101). The embedded monitoring host (100) receives and processes the switch quantity signals of the switch to be acquired by the switch quantity acquisition and synthesis module (200) in real time. The embedded monitoring host (100) is connected to a display module (102), which dynamically displays the open / closed status and alarm status of the switch to be acquired. The embedded monitoring host (100) is connected to a lower-level monitoring host (300) through the main communication module (101). The switch quantity acquisition and synthesis module (200) includes: an optocoupler isolation input module (201), each optocoupler isolation input module (201) supports the input of the status signal of the switch to be acquired, and is used to acquire the open / closed status and alarm status of the switch to be acquired; The switch quantity acquisition and synthesis module (200) further includes: a data processing unit (203), which has a built-in analog-to-digital conversion circuit and a protocol conversion chip. The data processing unit (203) is connected to the embedded monitoring host (100) through the main communication module (101). The data processing unit (203) is connected to a relay module (202), which includes normally open / normally closed contacts. The normally open / normally closed contacts are optically isolated and output fault signals according to the instructions of the embedded monitoring host (100). The data processing unit (203) is connected to a power supply module (205), which provides independent DC power supply and is isolated from the power supply of the embedded monitoring host (100).

2. The switch quantity acquisition and synthesis device according to claim 1, characterized in that, The main communication module (101) includes a communication interface (204) and a downlink communication module (103); the communication interface (204) is connected to the embedded monitoring host (100); the downlink communication module (103) is connected to the lower-level monitoring host (300); The optocoupler isolation input module (201) includes 64 optocouplers O1-O65; the 64 optocouplers O1-O65 are respectively connected to the data processing unit (203); the optocouplers O1-O65 are respectively connected to the switch status signals IN1-IN64 through 64 switch status signal ports PZ1 / ZT1-PZ64 / ZT64; The relay module (202) includes eight relays J1-J8; the eight relays J1-J8 are connected to the data processing unit (203) respectively; the eight relays J1-J8 are connected to fault output signals OUT1-OUT8 in sequence through fault output signal ports PF1 / FT1-PF16 / FT16.

3. The switch quantity acquisition and synthesis device according to claim 2, characterized in that, The embedded monitoring host (100) and the switch quantity acquisition and synthesis module (200) are connected via an RS-485 bus of model ADM2587E, and data is transmitted using the MODBUS RTU protocol. The RS-485 bus uses BELDEN 9841 twisted-pair shielded cable, with the shielding layer grounded at one end. The transmission distance is ≤1200 meters, and the baud rate is configured as 9600 / 19200 / 38400bps. The embedded monitoring host (100) has a built-in ARM Cortex-M7 processor, model STM32H743.

4. The switch quantity sampling composition device according to claim 3, characterized in that, The power supply module (205) of the switch quantity acquisition and synthesis module (200) adopts a DC 24V TDK-Lambda GXS2124 isolated power supply with an input voltage range of 18-36V and ripple noise ≤50mV; the communication interface (204) has a built-in RS-485 isolation chip of model ADM2587E, which supports ±15kV ESD protection and 4kV electrical isolation.

5. The switch quantity sampling composition device according to claim 4, characterized in that, The switch quantity acquisition and synthesis module (200) can be cascaded with I / O16-0 type switch quantity input modules, model SI16-0, with a cascade quantity of ≤4 and a total number of input points of ≤128.

6. The switch quantity sampling assembly device according to claim 5, wherein, One switch quantity acquisition and synthesis module (200) and one I / O16-0 module are cascaded. The cascaded modules are connected through an AMP 5-554720-3RJ45 interface. The cable is a CAT5e twisted pair cable, and the transmission distance is ≤50 meters.

7. The switch quantity sampling assembly device according to claim 5, wherein, Two digital input / output synthesis modules (200) are cascaded and the bus load capacity is extended through an RS-485 repeater of model MAX1480EPA.

8. A switch quantity collecting device according to claim 6 or 7, characterized in that, The device is mounted on DIN 35 rail and connected between modules by combined terminals of type PTFIX 6 / 6; input signal cable is 0.5 mm 2 type BELDEN 8760 shielded wire.

9. The switch quantity sampling composition device according to claim 8, characterized in that, Each optocoupler isolation channel of the optocoupler isolation input module (201) includes a high-speed optocoupler of model PC817X1 with a response time ≤1ms and insulation withstand voltage ≥5000Vrms; the relay contacts of the relay module (202) adopt G5V-2 type relays.

10. The switch quantity sampling composition device according to claim 9, wherein The data processing unit (203) has a built-in 16-bit analog-to-digital converter of model ADS1115 and a protocol conversion chip of model WCH CH438Q, with a sampling rate ≥1kSPS; the embedded monitoring host (100) supports the IEC 61850 protocol stack.

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