CN214674366U

CN214674366U - Intelligent capacitor based on Lora communication

Info

Publication number: CN214674366U
Application number: CN202120754174.2U
Authority: CN
Inventors: 张文魁; 李进超; 张宏超
Original assignee: Wuhan Kunneng Electric Technology Co ltd
Current assignee: Wuhan Kunneng Electric Technology Co ltd
Priority date: 2021-04-14
Filing date: 2021-04-14
Publication date: 2021-11-09
Anticipated expiration: 2031-04-14

Abstract

The utility model provides an intelligent capacitor based on Lora communication, intelligent capacitor includes intelligent control module, zero switching switch module, low pressure power capacitor, communication module, current sampling module and display module, and intelligent control module is connected with current sampling module, zero switching switch module, communication module and display module respectively, communication module includes Lora communication module and RS485 communication module for connect acquisition terminal or concentrator, realize the wireless transmission function; the Lora communication module comprises a control unit, a spread spectrum unit and an antenna unit; the intelligent capacitor has the advantages of long transmission distance, low working power consumption, more networking nodes, low terminal cost and easiness in construction and deployment, and simultaneously breaks through the limitation of physical connection, reduces the labor hour and the cost of each link.

Description

Intelligent capacitor based on Lora communication

Technical Field

The utility model belongs to low pressure reactive compensation field especially relates to an intelligent condenser based on Lora communication.

Background

With the rapid development and wide application of microelectronic technology, digital control technology, communication and network technology and the deep improvement of national smart grids. The intelligent, integrated, networked, energy-saving and environment-friendly intelligent electric appliance has the advantages of high reliability, usability, maintainability, energy conservation and environmental protection, is the mainstream for developing intelligent electric appliances safely, and has wide related measures for improving the electric energy quality, mainly comprising the aspects of reactive power compensation, harmonic suppression, voltage fluctuation and flicker reduction, three-phase imbalance solution and the like. The intelligent capacitor belongs to the field of low-voltage reactive compensation, integrates advanced technologies such as modern measurement and control, power electronics, network communication, automatic control, power capacitors and the like, changes the laggard controller technology and the laggard mechanical contactor or the switching technology of taking an electromechanical integrated switch as a switching capacitor in the traditional reactive compensation device, thereby realizing overvoltage and undervoltage protection and over-temperature and open-phase protection of the capacitor, prolonging the service life and ensuring the safe operation of a system.

The communication function is indispensable in the intelligent capacitor, and the traditional communication mode is RS232 communication, but it still has some problems in the use: 1. the signal level value of the interface is higher, the chip of the interface circuit is easy to damage, and the level conversion circuit is required to be connected with the TTL circuit because the level conversion circuit is incompatible with the TTL level; 2. the transmission rate is low, and the baud rate is 20Kbps during asynchronous transmission; 3. the interface uses a signal line and a signal return line to form a common-ground transmission mode, and common-ground transmission is easy to generate common-mode interference, so that the noise interference resistance is weak; 4. the transmission distance is limited, the standard value of the maximum transmission distance is 50 feet, and the maximum transmission distance can only be used for about 15 meters in practice. In addition, with the popularization of smart terminals and the diversification of applications (high definition video, VR, and AR) in recent years, wireless communication has been rapidly developed, and 5G technology has gradually entered the commercial stage. Therefore, in the field of communication, not only a high-speed, low-power consumption, long-distance communication method but also a wireless communication method and an intelligent method are required.

Disclosure of Invention

The utility model provides an intelligence condenser based on Lora communication, this intelligence condenser have transmission distance far away, the work low power dissipation, the network deployment node is many, the terminal is with low costs and the easy advantage of building and arranging, broken through the limitation of physics line simultaneously, reduced artifical man-hour and reduced the cost of each link.

Realize the utility model discloses the technical scheme that above-mentioned purpose adopted does:

an intelligent capacitor based on Lora communication comprises an intelligent control module, a zero-switching switch module, a low-voltage power capacitor, a communication module and a display module, wherein the intelligent control module is respectively connected with the zero-switching switch module, the communication module and the display module; the communication module comprises a Lora communication module and an RS485 communication module and is used for connecting the acquisition terminal or the concentrator to realize a wireless transmission function; the Lora communication module comprises a control unit, a spread spectrum unit and an antenna unit, wherein the control unit is used for receiving data transmitted by the intelligent control module and sending the data to the spread spectrum unit, the spread spectrum unit is used for spread spectrum modulation, and the antenna unit is used for transmitting the data to the acquisition terminal or the concentrator; the low-voltage power capacitor is provided with a temperature sensor, and the temperature sensor is used for collecting temperature data to realize over-temperature protection.

The low-voltage power capacitor is a metalized polypropylene film capacitor.

The communication module is connected with the acquisition terminal and transmits parameter information of distribution voltage, current, reactive power, power factors, capacitor capacity, fault information, internal temperature, capacitor three-phase current and capacitance state to the acquisition terminal.

And the acquisition terminal transmits the parameter information to the system main station platform.

The intelligent capacitor further comprises a heat dissipation auxiliary module.

Compared with the prior art, the beneficial effects of the utility model are that: 1. the utility model has the advantages of long transmission distance, low working power consumption, more networking nodes, low terminal cost and easy construction and deployment by the Lora communication module; 2. the utility model has the advantages of ultra-low power consumption, ultra-strong penetration ability, ultra-strong transmission distance, ultra-strong service life, wide connection and low cost of Lora communication, breaks through the limitation of physical connection, makes the box body cleaner and more beautiful, and can reduce the labor hour and the cost of each link in production detection, user installation and debugging and operation maintenance; 3. the utility model discloses an adopt intelligent control module, zero on-off switch module, low pressure power capacitor, current sampling module, communication module and display module to replace intelligent reactive power controller, fuse and relay synchronous switch among the traditional electric power capacitance compensation device, make the utility model provides an intelligent capacitor has that the compensation mode is nimble (mend altogether and mend with the branch and can make up wantonly), and compensation effect is good, the device is small, the low power dissipation, installation maintenance convenience, long service life, protect function are strong and the advantage that the reliability is high, has satisfied the user to reactive compensation, has improved voltage quality and energy-conserving actual demand that reduces the loss simultaneously.

Drawings

Fig. 1 is a schematic block diagram of an intelligent capacitor based on Lora communication provided by the present invention;

fig. 2 is a schematic block diagram of a Lora communication module in an intelligent capacitor based on Lora communication provided by the present invention;

fig. 3 is a circuit diagram of a Lora communication module provided by the embodiment of the present invention.

Detailed Description

The invention is further described with reference to the following figures and examples.

As shown in fig. 1, a current sampling module in the embodiment samples by using a micro sensor, collects electric energy parameters such as voltage, current, power factors and the like of a power grid in real time, and then transmits the electric energy parameters to an intelligent control module in real time, and the intelligent control module performs corresponding algorithm operation on the collected data and converts the data into corresponding remote control and remote regulation signals; outputting switching control signals of the intelligent capacitor to the zero switching switch module, and then controlling the switching state of the low-voltage power capacitor by the zero switching switch module according to the received switching control signals; meanwhile, the intelligent control module correspondingly displays and explains the distribution voltage, the current, the reactive power, the power factor and the three-phase current, the capacitance capacity, the fault information and the internal temperature and capacitance state parameter information of the low-voltage power capacitor through the display module, uploads the parameter information to the acquisition terminal through the Lora communication module and the RS485 communication module in the communication module, and then transmits the parameter information and the running condition to the system master station platform through the acquisition terminal; the functional block diagram of the Lora communication module is shown in fig. 2, a control unit in the Lora communication module receives data transmitted by an intelligent control module through a serial port and sends the received data to a spread spectrum unit, the spread spectrum unit carries out spread spectrum modulation on the data and sends the data out through an antenna unit, a module circuit diagram of the Lora communication module is shown in fig. 3, the Lora communication module is WH-L102-L-P, the WH-L102-L-P is grounded through a capacitor C191, and other Lora chips can also be adopted.

The low voltage power capacitor among the intelligence condenser based on Lora communication that this embodiment provided has adopted metallization polypropylene film electric capacity, and inside has temperature sensor. If overvoltage appears in low voltage power capacitor in the use, cross the harmonic, leak current too big or the too high condition of ambient temperature, lead to the inside temperature anomaly that generates heat of low voltage power capacitor, temperature sensor can realize the excess temperature protection to it, avoid the high temperature and the low voltage power capacitor's that leads to accelerated thermal aging, loss increase and life reduce, still be provided with the heat dissipation auxiliary module in the intelligent capacitor based on Lora communication in this embodiment simultaneously, ventilate the heat dissipation to it in intelligent capacitor's course of operation, prevent the high temperature.

By combining the embodiment, the utility model has the advantages of ultra-low power consumption, ultra-strong penetration capacity, ultra-strong transmission distance, ultra-long service life, wide connection and low cost through the Lora communication, breaks through the limitation of physical connection, enables the box body to be cleaner and more beautiful, and simultaneously can reduce the labor hour and the cost of each link in production detection, user installation and debugging and operation maintenance; the utility model discloses an adopt intelligent control module, zero on-off switch module, low pressure power capacitor, current sampling module, communication module and display module to replace intelligent reactive controller, fuse and relay synchronous switch among the traditional electric power capacitance compensation device, make the utility model provides an intelligent capacitor has that the compensation mode is nimble (mend altogether and mend with the branch and can make up wantonly), and compensation effect is good, the device is small, the low power dissipation, installation maintenance convenience, long service life, protect function are strong and the high advantage of reliability, has satisfied the user to reactive compensation, has improved voltage quality and energy-conservation and has reduced the actual demand that decreases simultaneously.

Claims

1. The utility model provides an intelligent capacitor based on Lora communication, includes intelligent control module, zero switch module, low pressure power capacitor, communication module and display module, and intelligent control module is connected its characterized in that with zero switch module, communication module and display module respectively: the intelligent capacitor also comprises a current sampling module connected with the intelligent control module, and the current sampling module adopts a micro sensor and is used for collecting high-precision electric energy parameters; the communication module comprises a Lora communication module and an RS485 communication module and is used for connecting the acquisition terminal or the concentrator to realize a wireless transmission function; the Lora communication module comprises a control unit, a spread spectrum unit and an antenna unit, wherein the control unit is used for receiving data transmitted by the intelligent control module and sending the data to the spread spectrum unit, the spread spectrum unit is used for spread spectrum modulation, and the antenna unit is used for transmitting the data to the acquisition terminal or the concentrator; the low-voltage power capacitor is provided with a temperature sensor, and the temperature sensor is used for collecting temperature data to realize over-temperature protection.

2. The intelligent capacitor based on Lora communication of claim 1, wherein: the low-voltage power capacitor is a metalized polypropylene film capacitor.

3. The intelligent capacitor based on Lora communication of claim 1, wherein: the communication module is connected with the acquisition terminal and transmits parameter information of distribution voltage, current, reactive power, power factors, capacitor capacity, fault information, internal temperature, capacitor three-phase current and capacitance state to the acquisition terminal.

4. A smart capacitor based on Lora communication according to claim 3, wherein: and the acquisition terminal transmits the parameter information to the system main station platform.

5. The intelligent capacitor based on Lora communication of claim 1, wherein: the intelligent capacitor further comprises a heat dissipation auxiliary module.