CN207650261U - A kind of new distribution network data acquisition terminal - Google Patents

Abstract

The utility model discloses a novel distribution network data collection terminal. It includes a main control board, a data acquisition board and a substrate. The main control board is equipped with a main control module, a GPRS module, a serial port module, a storage module, an alarm module, a human-computer interaction module, and a switch state acquisition circuit for detecting the state of a power distribution switch. There is an electric energy meter module on the data acquisition board, a power supply module and an AC signal conversion circuit on the base board, and the main control module is electrically connected to the GPRS module, serial port module, storage module, alarm module, human-computer interaction module and switch state acquisition circuit. , the main control module is electrically connected to the electric energy meter module through the serial port module, and the electric energy meter module is electrically connected to the AC signal conversion circuit. The utility model realizes real-time monitoring of power parameters such as voltage, current, power, and power factor, collects switch states, and feeds the data and states back to the main station, providing data basis and information for distribution network planning, design, operation and maintenance, and marketing. Scientific basis for decision-making.

Description

A new type of distribution network data acquisition terminal

technical field

The utility model relates to the technical field of distribution network data monitoring, in particular to a novel distribution network data acquisition terminal.

Background technique

The distribution network is the network that directly connects the secondary side of the power system with the low-voltage power supply users. The distribution network is also the last link of power generation, transmission, transformation and distribution, and occupies an important position in the automation of the power system. There are two types of distribution network, urban distribution network and rural distribution network. Both networks are powered by multiple channels and have flexible operation modes. Therefore, the distribution network is also complex and changeable. Most of the distribution network is a tree structure, overhead Lines account for the vast majority, with poor reliability and high accident rates, such as equipment damage caused by severe overloading of distribution transformers, damage of distribution transformers caused by severe three-phase loads, and waste caused by long-term light-load operation of distribution networks Therefore, it is necessary to strengthen the management and application of smart distribution network.

Contents of the invention

In order to solve the above problems, the utility model provides a new distribution network data acquisition terminal, which realizes real-time monitoring of power parameters such as voltage, current, power, and power factor, and collects switch states. and status feedback to the main station, providing data basis and scientific decision-making basis for distribution network planning, design, operation and maintenance and marketing.

In order to solve the above problems, the utility model adopts the following technical solutions to achieve:

A novel distribution network data acquisition terminal of the utility model includes a main control board, a data acquisition board and a base plate, and the main control board is provided with a main control module, a GPRS module, a serial port module, a storage module, an alarm module, a The computer interaction module and the switch state acquisition circuit for detecting the state of the power distribution switch. The data acquisition board is provided with a power meter module, and the base board is provided with a power supply module and an AC signal conversion circuit. The power supply module is used to convert the slave distribution The AC voltage input by the power grid is converted into a DC voltage to supply power to the main control board, data acquisition board and substrate, and the AC signal conversion circuit is used to convert the strong electric signal on the distribution network into a weak electric signal to provide sampling signals for the electric energy meter module, The main control module is electrically connected with the GPRS module, the serial port module, the storage module, the alarm module, the human-computer interaction module and the switch state acquisition circuit respectively, and the main control module is electrically connected with the electric energy meter module through the serial port module, and the electric energy meter The module is electrically connected with the AC signal conversion circuit.

In this technical solution, the input end of the power module on the substrate is connected to the distribution network, and the power module converts the AC voltage input from the distribution network into a DC voltage to supply power to the main control board, the data acquisition board and the substrate.

The AC signal conversion circuit is used to convert the strong electric signal on the distribution network into a weak electric signal, and provide the sampling signal (current and voltage) for the electric energy meter module, and the electric energy meter module detects the sampling signal to calculate the voltage, current, power, power factor and other power parameters, and send the detected data to the main control module to realize the function of detecting the voltage and current of the distribution network.

The main control module receives the collected data sent by the electric energy meter module, performs analysis and calculation, and obtains relevant statistical results. When abnormal information occurs, the alarm module sends an alarm, and at the same time stores relevant information and data in the storage module. The main control module sends the collected data of the electric energy meter module, the results of its own analysis and calculation and the abnormal conditions monitored to the main station through the GPRS module. The master control module can receive information from the master station. The switch state acquisition circuit is used to detect whether the power distribution switch is in the closed state or the open state.

The utility model adopts a three-layer circuit board to realize the isolation between strong electricity and weak electricity. The strong electricity only appears on the base plate and the data acquisition board, and will not contact the main control board, thus protecting the safety of electronic devices on the main control board.

Preferably, the human-computer interaction module includes a display screen, LED indicator lights and buttons, and the main control module is electrically connected to the display screen, LED indicator lights and buttons respectively.

Preferably, the main control module communicates wirelessly with the main station through a GPRS module.

Preferably, a switch control circuit for controlling closing/opening of the power distribution switch is further provided on the substrate, and the switch control circuit is electrically connected to the main control module.

Preferably, the electric energy meter module includes an ATT7022B electric energy metering chip and an STC12C5412 single-chip microcomputer, the ATT7022B electric energy metering chip is electrically connected to an AC signal conversion circuit, the ATT7022B electric energy metering chip is electrically connected to the STC12C5412 single-chip microcomputer through an SPI interface, and the main control The module is electrically connected with the STC12C5412 microcontroller through the serial port module.

Preferably, the power supply module includes an AC-DC conversion module, a DC-DC conversion module and an LDO module, the input end of the AC-DC conversion module is connected to the three-phase alternating current, and the output end of the AC-DC conversion module is connected to the The input end of the DC-DC conversion module and the input end of the LDO module are electrically connected, the voltage output by the AC-DC conversion module supplies power to the substrate, the voltage output by the DC-DC conversion module supplies power to the data acquisition board, and the voltage output by the LDO module Supply power to the main control board.

Preferably, a storage battery is further provided on the main control board, and the storage battery is electrically connected to the output terminals of the main control module and the LDO module. When the power module fails, the storage battery supplies power to the main control module, and the main control module sends power failure information to the main station through the GPRS module, and notifies the main station for timely maintenance.

The beneficial effects of the utility model are: realize the real-time monitoring of power parameters such as voltage, current, power, power factor, etc., collect and control the state of the switch, have wireless communication technology, and feed back the data and state to the main station, which is a power distribution network. Planning, design, operation and maintenance and marketing provide data basis and scientific decision-making basis.

Description of drawings

Fig. 1 is a kind of structural representation of the utility model;

Fig. 2 is a circuit principle connection block diagram of the utility model.

In the figure: 1. Main control board, 2. Data acquisition board, 3. Substrate, 4. Main control module, 5. GPRS module, 6. Serial port module, 7. Storage module, 8. Alarm module, 9. Human-computer interaction Module, 10. Switch state acquisition circuit, 11. Energy meter module, 12. Power supply module, 13. AC signal conversion circuit, 14. Display screen, 15. LED indicator light, 16. Button, 17. Master station, 18. Switch Control circuit.

Detailed ways

The technical solutions of the present utility model will be further specifically described below through the embodiments and in conjunction with the accompanying drawings.

Embodiment: A new distribution network data acquisition terminal of this embodiment, as shown in Figure 1 and Figure 2, includes a main control board 1, a data acquisition board 2 and a substrate 3, and the main control board 1 is provided with a main control module 4. GPRS module 5, serial port module 6, storage module 7, alarm module 8, man-machine interaction module 9 and switch state acquisition circuit 10 for detecting the state of power distribution switch, data acquisition board 2 is provided with electric energy meter module 11, substrate 3 There is a power module 12 and an AC signal conversion circuit 13 on it. The power module 12 is used to convert the AC voltage input from the distribution network into a DC voltage to supply power to the main control board 1, the data acquisition board 2 and the substrate 3. The AC signal conversion circuit 13 is used to convert the strong electric signal on the distribution network into a weak electric signal to provide sampling signals for the energy meter module 11, and the main control module 4 communicates with the GPRS module 5, the serial port module 6, the storage module 7, the alarm module 8, and the human-computer interaction module respectively. 9 is electrically connected with the switch state acquisition circuit 10, the main control module 4 is electrically connected with the electric energy meter module 11 through the serial port module 6, the electric energy meter module 11 is electrically connected with the AC signal conversion circuit 13, and the main control module 4 is connected with the main station through the GPRS module 5 17 for wireless communication.

The input end of the power module on the base board is connected to the distribution network, and the power module converts the AC voltage input from the distribution network into a DC voltage to supply power to the main control board, the data acquisition board and the base board.

The AC signal conversion circuit is used to convert the strong electric signal on the distribution network into a weak electric signal, and provide the sampling signal (current and voltage) for the electric energy meter module, and the electric energy meter module detects the sampling signal to calculate the voltage, current, power, power factor and other power parameters, and send the detected data to the main control module to realize the function of detecting the voltage and current of the distribution network.

The main control module receives the collected data sent by the electric energy meter module, performs analysis and calculation, and obtains relevant statistical results. When abnormal information occurs, the alarm module sends an alarm, and at the same time stores relevant information and data in the storage module. The main control module sends the collected data of the electric energy meter module, the results of its own analysis and calculation and the abnormal conditions monitored to the main station through the GPRS module. The master control module can receive information from the master station. The switch state acquisition circuit is used to detect whether the power distribution switch is in the closed state or the open state.

The utility model adopts a three-layer circuit board to realize the isolation between strong electricity and weak electricity. The strong electricity only appears on the base plate and the data acquisition board, and will not contact the main control board, thus protecting the safety of electronic devices on the main control board.

The main control module adopts AT91SAM7S256 chip. The memory module adopts the memory of FM3116 model of RAMTRON Company.

The human-computer interaction module 9 includes a display screen 14 , LED indicator lights 15 and buttons 16 , and the main control module 4 is electrically connected to the display screen 14 , LED indicator lights 15 and buttons 16 respectively.

A switch control circuit 18 for controlling closing/opening of the power distribution switch is also provided on the substrate 3 , and the switch control circuit 18 is electrically connected to the main control module 4 .

The energy meter module 11 includes an ATT7022B electric energy metering chip and an STC12C5412 single-chip microcomputer. The ATT7022B electric energy metering chip is electrically connected to the AC signal conversion circuit 13. The ATT7022B electric energy metering chip is connected to the STC12C5412 single-chip electromechanical through the SPI interface. The main control module 4 is connected to the STC12C5412 single-chip electromechanical through the serial port module. connect.

The power supply module 12 includes an AC-DC conversion module, a DC-DC conversion module and an LDO module. The input end of the AC-DC conversion module is connected to the three-phase alternating current, and the output end of the AC-DC conversion module is connected to the input end of the DC-DC conversion module. 1. The input terminal of the LDO module is electrically connected, the voltage output by the AC-DC conversion module supplies power to the substrate, the voltage output by the DC-DC conversion module supplies power to the data acquisition board, and the output voltage of the LDO module supplies power to the main control board.

The main control board 1 is also provided with a storage battery, and the storage battery is electrically connected to the output terminals of the main control module and the LDO module. When the power module fails, the storage battery supplies power to the main control module, and the main control module sends power failure information to the main station through the GPRS module, and notifies the main station for timely maintenance.

Claims (5)

1. a kind of new distribution network data acquisition terminal, which is characterized in that including master control borad（1）, data acquisition board（2）And substrate （3）, the master control borad（1）It is equipped with main control module（4）, GPRS module（5）, serial port module（6）, memory module（7）, alarm mould Block（8）, human-computer interaction module（9）And the on off state Acquisition Circuit of detection panel switches state（10）, the data acquisition Plate（2）It is equipped with electric energy meter module（11）, the substrate（3）It is equipped with power module（12）With AC signal conversion circuit （13）, the power module（12）For the alternating voltage inputted from power distribution network to be converted to DC voltage to master control borad（1）, number According to collection plate（2）And substrate（3）Power supply, the AC signal conversion circuit（13）For the forceful electric power signal on power distribution network to be converted It is electric energy meter module for weak electric signal（11）Sampled signal, the main control module are provided（4）Respectively with GPRS module（5）, serial ports Module（6）, memory module（7）, alarm module（8）, human-computer interaction module（9）With on off state Acquisition Circuit（10）Electrical connection, The main control module（4）Pass through serial port module（6）With electric energy meter module（11）Electrical connection, the electric energy meter module（11）With exchange Signaling conversion circuit（13）Electrical connection.

2. a kind of new distribution network data acquisition terminal according to claim 1, which is characterized in that the human-computer interaction mould Block（9）Including display screen（14）, LED light（15）And button（16）, the main control module（4）Respectively with display screen（14）、 LED light（15）And button（16）Electrical connection.

3. a kind of new distribution network data acquisition terminal according to claim 1, which is characterized in that the substrate（3）On It is additionally provided with the ON-OFF control circuit for closing a floodgate/opening a sluice gate for controlling panel switches（18）, the ON-OFF control circuit（18）With master control Module（4）Electrical connection.

4. a kind of new distribution network data acquisition terminal according to claim 1, which is characterized in that the electric energy meter module （11）Including ATT7022B electric energy computation chips and STC12C5412 microcontrollers, the ATT7022B electric energy computation chips with exchange Signaling conversion circuit（13）Electrical connection, the ATT7022B electric energy computation chips pass through SPI interface and STC12C5412 microcontrollers Electrical connection, the main control module（4）Pass through serial port module（6）With STC12C5412 monolithic mechatronics.

5. a kind of new distribution network data acquisition terminal according to claim 1, which is characterized in that the power module （12）Including AC-DC conversion module, DC-DC conversion modules and LDO modules, the input terminal and three-phase of the AC-DC conversion module Exchange electrical connection, the output end of the AC-DC conversion module and the input terminal of DC-DC conversion modules, the input terminal electricity of LDO modules Connection, the voltage that the AC-DC conversion module exports are powered to substrate, and the voltage that DC-DC conversion modules export is acquired to data Plate is powered, and the voltage that LDO modules export is powered to master control borad.