CN215897304U - Unbalanced three phase adjusting device - Google Patents

Unbalanced three phase adjusting device Download PDF

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Publication number
CN215897304U
CN215897304U CN202022791986.2U CN202022791986U CN215897304U CN 215897304 U CN215897304 U CN 215897304U CN 202022791986 U CN202022791986 U CN 202022791986U CN 215897304 U CN215897304 U CN 215897304U
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module
lora
phase
intelligent
phase change
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CN202022791986.2U
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王川
朱洪
吴凯
王康
马如意
张超
周扬
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Tulufan Power Supply Co Of State Grid Xinjiang Electric Power Co ltd
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Tulufan Power Supply Co Of State Grid Xinjiang Electric Power Co ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02B90/20—Smart grids as enabling technology in buildings sector
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20—End-user application control systems
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
    • Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
    • Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission

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Abstract

The utility model discloses a three-phase imbalance adjusting device.A smart monitoring terminal comprises an MCU (microprogrammed control Unit) main control module, a 4G wireless communication module and a LoRa gateway module; the 4G wireless communication module and the LoRa gateway module are connected with the MCU master control module; the LoRa gateway module comprises a LoRa communication unit; each intelligent phase change switch comprises a single chip microcomputer, an electromagnetic relay, a switching unit, a phase change switch, a feedback module and a LoRa node module; the LoRa node module, the electromagnetic relay, the phase change switch and the feedback module are electrically connected with the single chip microcomputer; the LoRa node module is in communication connection with a LoRa gateway module of the intelligent monitoring terminal, and the electromagnetic relay controls the switching unit to realize that the unidirectional load connected with the switching unit is connected to different circuits; the LoRa node module comprises a LoRa communication unit and a LoRa antenna interface; the LoRa antenna interface is used for installing a LoRa antenna. The utility model adopts the LoRa communication mode and can establish the LoRa micropower network through simple star networking.

Description

Unbalanced three phase adjusting device
Technical Field
The utility model relates to the technical field of power systems, in particular to a three-phase unbalance adjusting device.
Background
With the overall improvement of the living standard of people in China, high-power electric equipment such as air conditioners, water heaters and motors in places such as residents, hospitals, schools and factories are continuously connected, so that the three-phase load of a low-voltage power supply system is seriously unbalanced, and the phenomenon of local overload is generated occasionally, thereby not only influencing the power supply capacity and the power supply quality of the power supply system, but also increasing the accidents and faults of the power system caused by the serious unbalance of the three-phase load. The three-phase load balance of the existing low-voltage power supply system is still based on load detection and data monitoring, when the faults and accidents of the power system are found, the balance of the power grid is manually adjusted, the workload is large, and the efficiency is low. After 2015, related power enterprises begin to adopt intelligent devices to treat three-phase imbalance, and generally, the detection devices are installed on the secondary side of a transformer, and the action devices are installed on the incoming line of a single-phase user line, so that the distance between the detection devices and the action devices is far. The detection device provides the signals for the singlechip to be processed, and after the processing, the action signals are sent to the action device through the power carrier device or the radio transmission device. The power line is not suitable for being used as a communication channel as an energy transmission medium, and the internal noise signal is large, which causes interference to the control signal. The use of radio transmission means is an effective solution to the communication problem, but the sending of control commands alone uses a dedicated and encryption-requiring transmitter, which is cost-prohibitive.
The LoRa technology is a long-distance low-power consumption transmission technology released by Semtech corporation in the United states, and is one of LPWAN communication technologies. The modulation mode greatly enhances the communication distance compared with other communication modes. The method can be widely applied to the field of the Internet of things, and the LoRa communication technology has the advantages of high resolution, strong network reliability and extremely low power consumption compared with other unauthorized LPWAN technologies. The LoRa network architecture is a star topology network, namely, each terminal node and the gateway can directly carry out information intercommunication, so that not only is the complexity of network operation reduced, but also the power consumption is effectively reduced.
SUMMERY OF THE UTILITY MODEL
1. The technical problem to be solved is as follows:
in order to solve the technical problem, the utility model provides a three-phase imbalance adjusting device, which realizes communication between intelligent monitoring terminals and between intelligent phase change switches in a LoRa communication mode.
2. The technical scheme is as follows:
a three-phase unbalance adjusting device comprises an intelligent monitoring terminal, a current acquisition module and a plurality of intelligent phase change switches; the current acquisition module acquires current value information of each phase in three-phase four-wire output by the transformer and transmits the acquired current value information to the intelligent monitoring terminal; the intelligent phase change switches are connected in parallel with a three-phase four-wire electric circuit, and the output end of each intelligent phase change switch is connected with at least one unidirectional load.
The intelligent monitoring terminal comprises an MCU main control module, a 4G wireless communication module and a LoRa gateway module; the 4G wireless communication module and the LoRa gateway module are connected with the MCU master control module; the LoRa gateway module comprises a LoRa communication unit; and a three-phase imbalance adjusting algorithm and control strategy software are arranged in the intelligent monitoring terminal.
Each intelligent phase change switch comprises a single chip microcomputer, an electromagnetic relay, a switching unit, a phase change switch, a feedback module and a LoRa node module; the LoRa node module, the electromagnetic relay, the phase change switch and the feedback module are electrically connected with the single chip microcomputer; the LoRa node module is in communication connection with a LoRa gateway module of the intelligent monitoring terminal, and the electromagnetic relay controls the switching unit to realize that the unidirectional load connected with the switching unit is connected to different circuits; the LoRa node module comprises a LoRa communication unit and a LoRa antenna interface; the LoRa antenna interface is used for installing a LoRa antenna.
Furthermore, a current sensor is arranged between the output end of the phase-change switch and the single-phase load, and the current sensor is connected with the single chip microcomputer.
Further, the MCU master control module adopts one of STM32 series single-chip microcomputers.
Furthermore, the intelligent monitoring terminal also comprises a Bluetooth module and an RS485 communication module; the Bluetooth module and the RS485 communication module are connected with the MCU master control module.
3. Has the advantages that:
the utility model provides a three-phase imbalance adjusting device.A core algorithm and control strategy software is arranged in an intelligent monitoring terminal, which is a core control part of the device and is responsible for summarizing and analyzing and operating the core algorithm and the control strategy of the device and information. The intelligent phase change switch is a specific execution part of the system and is responsible for phase change logic control of the phase change switch; the utility model adopts LoRa communication mode, and can build LoRa micropower network through simple star-type networking. The intelligent terminal sets up the loRa gateway, and intelligent commutation switch sets up loRa node module, has the function of automatic network deployment.
Drawings
FIG. 1 is an overall block diagram of the present invention;
FIG. 2 is a schematic structural diagram of an intelligent monitoring terminal according to the present invention;
fig. 3 is a schematic mechanism diagram of the phase change switch of the present invention.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1 to 3, a three-phase imbalance adjusting device comprises an intelligent monitoring terminal, a current acquisition module and a plurality of intelligent phase change switches; the current acquisition module acquires current value information of each phase in three-phase four-wire output by the transformer and transmits the acquired current value information to the intelligent monitoring terminal; the intelligent phase change switches are connected in parallel with a three-phase four-wire electric circuit, and the output end of each intelligent phase change switch is connected with at least one unidirectional load.
As shown in fig. 2, the intelligent monitoring terminal includes an MCU master control module, a 4G wireless communication module, and an LoRa gateway module; the 4G wireless communication module and the LoRa gateway module are connected with the MCU master control module; the LoRa gateway module comprises a LoRa communication unit; and a three-phase imbalance adjusting algorithm and control strategy software are arranged in the intelligent monitoring terminal.
As shown in fig. 3, each intelligent phase change switch comprises a single chip microcomputer, an electromagnetic relay, a switching unit, a phase change switch, a feedback module and a LoRa node module; the LoRa node module, the electromagnetic relay, the phase change switch and the feedback module are electrically connected with the single chip microcomputer; the LoRa node module is in communication connection with a LoRa gateway module of the intelligent monitoring terminal, and the electromagnetic relay controls the switching unit to realize that the unidirectional load connected with the switching unit is connected to different circuits; the LoRa node module comprises a LoRa communication unit and a LoRa antenna interface; the LoRa antenna interface is used for installing a LoRa antenna.
In the device, the input end of a phase change switch is connected with a three-phase line, the output end of the phase change switch is single-phase electricity, a thyristor and a fling-cut switch connected with the thyristor in parallel are arranged in each phase circuit at the input end of the phase change switch, and the branch circuit to which the output circuit is connected is realized through a fling-cut device in the phase change switch, wherein the fling-cut device is controlled by an electromagnetic relay; the intelligent monitoring terminal sends a phase change command to the intelligent phase change switch connected with the intelligent phase change switch according to the detected phase current of each phase on the side of the transformer and the current of the load and a built-in three-phase imbalance adjusting algorithm, and the intelligent phase change switch controls the switching device to achieve the purpose of phase change according to the received command.
Furthermore, a current sensor is arranged between the output end of the phase-change switch and the single-phase load, and the current sensor is connected with the single chip microcomputer.
Further, the MCU master control module adopts one of STM32 series single-chip microcomputers.
Furthermore, the intelligent monitoring terminal also comprises a Bluetooth module and an RS485 communication module; the Bluetooth module and the RS485 communication module are connected with the MCU master control module.
The specific embodiment is as follows:
as shown in fig. 1, a three-phase imbalance adjusting device comprises an intelligent monitoring terminal, a current acquisition module and a plurality of intelligent phase-change switches; the monitoring terminal is the control core of whole device, and intelligent commutation switch is the actuating mechanism of device, carries out the information interaction through loRa wireless communication between them, and the completion is joined in marriage the improvement of joining in marriage net unbalanced three-phase problem each other.
The intelligent monitoring terminal is a control terminal of the whole device, and each set of device is provided with only one monitoring terminal. The device is responsible for collecting various state information and data of the whole device and sending various instructions through logic operation to complete the control of the whole device. The method comprises the steps of detecting a voltage signal of a distribution network bus; receiving load current data uploaded by the phase change switches, calculating load balance and distribution conditions, and sending phase change commands to each intelligent phase change switch through analysis and calculation; and receiving the running state and fault information uploaded by the intelligent phase change switch, and then performing corresponding control operation.
The intelligent phase-change switch is a branch and an execution mechanism of the device, and the capacity and the number of the phase-change switch can be flexibly selected according to different distribution conditions of the capacity of the distribution transformer and the load. The load current monitoring system is responsible for collecting load current data and uploading the load current data and state information of the load current data to a main controller through wireless communication; receiving a commutation command of a main controller to carry out commutation operation; receiving a fault protection command of a main controller to perform corresponding operation; and displaying the running state information of the user.
The intelligent monitoring terminal comprises an MCU main control module, a 4G wireless communication module and a LoRa gateway module; the 4G wireless communication module and the LoRa gateway module are connected with the MCU master control module; the LoRa gateway module comprises a LoRa communication unit; and a three-phase imbalance adjusting algorithm and control strategy software are arranged in the intelligent monitoring terminal. Each intelligent phase change switch comprises a single chip microcomputer, an electromagnetic relay, a switching unit, a phase change switch, a feedback module and a LoRa node module; the LoRa node module, the electromagnetic relay, the phase change switch and the feedback module are electrically connected with the single chip microcomputer; the LoRa node module is in communication connection with a LoRa gateway module of the intelligent monitoring terminal, and the electromagnetic relay controls the switching unit to realize that the unidirectional load connected with the switching unit is connected to different circuits; the LoRa node module comprises a LoRa communication unit and a LoRa antenna interface; the LoRa antenna interface is used for installing a LoRa antenna. The utility model adopts the LoRa communication mode, and can establish the LoRa micropower network through simple star networking to realize the communication of the whole set of devices. The utility model adopts the 4G wireless communication module to realize the communication with the upper computer; and meanwhile, an RS485 communication module and a Bluetooth module are provided, so that the intelligent monitoring terminal is favorable for realizing communication with other terminals.
Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims (4)

1. A three-phase unbalance adjusting device comprises an intelligent monitoring terminal, a current acquisition module and a plurality of intelligent phase change switches; the current acquisition module acquires current value information of each phase in three-phase four-wire output by the transformer and transmits the acquired current value information to the intelligent monitoring terminal; the intelligent phase change switches are connected in parallel with a three-phase four-wire electric circuit, and the output end of each intelligent phase change switch is connected with at least one unidirectional load; the method is characterized in that:
the intelligent monitoring terminal comprises an MCU main control module, a 4G wireless communication module and a LoRa gateway module; the 4G wireless communication module and the LoRa gateway module are connected with the MCU master control module; the LoRa gateway module comprises a LoRa communication unit; a three-phase imbalance adjusting algorithm and control strategy software are arranged in the intelligent monitoring terminal;
each intelligent phase change switch comprises a single chip microcomputer, an electromagnetic relay, a switching unit, a phase change switch, a feedback module and a LoRa node module; the LoRa node module, the electromagnetic relay, the phase change switch and the feedback module are electrically connected with the single chip microcomputer; the LoRa node module is in communication connection with a LoRa gateway module of the intelligent monitoring terminal, and the electromagnetic relay controls the switching unit to realize that the unidirectional load connected with the switching unit is connected to different circuits; the LoRa node module comprises a LoRa communication unit and a LoRa antenna interface; the LoRa antenna interface is used for installing a LoRa antenna.
2. A three-phase unbalance adjustment device according to claim 1, wherein: a current sensor is arranged between the output end of the intelligent phase-change switch and the single-phase load, and the current sensor is connected with the single-chip microcomputer.
3. A three-phase unbalance adjustment device according to claim 1, wherein: the MCU master control module adopts one of STM32 series single-chip microcomputers.
4. A three-phase unbalance adjustment device according to claim 1, wherein: the intelligent monitoring terminal also comprises a Bluetooth module and an RS485 communication module; the Bluetooth module and the RS485 communication module are connected with the MCU master control module.
CN202022791986.2U 2020-11-27 2020-11-27 Unbalanced three phase adjusting device Active CN215897304U (en)

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Application Number Priority Date Filing Date Title
CN202022791986.2U CN215897304U (en) 2020-11-27 2020-11-27 Unbalanced three phase adjusting device

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Application Number Priority Date Filing Date Title
CN202022791986.2U CN215897304U (en) 2020-11-27 2020-11-27 Unbalanced three phase adjusting device

Publications (1)

Publication Number Publication Date
CN215897304U true CN215897304U (en) 2022-02-22

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