CN207491146U - A kind of distribution terminal communication system - Google Patents

Abstract

The utility model discloses a kind of distribution terminal communication systems,It is related to power distribution network communication technique field,It is used in wireless telecommunications for existing power distribution network and transmits power consumption,Transmission rate,Transmitted data amount and transmission range, which are unable to good match and majority, to be needed to rely on the technical issues of infrastructure offer communication support causes construction cost high,Using including data acquisition device,Data concentrator,Network server and monitor terminal,The data acquisition device is wirelessly connect with data concentrator,The data concentrator is connect by network with network server,The technical solution that the network server is connect with monitor terminal solves the problems, such as,The utility model is used based on the exclusive low energy consumption of LoRa technologies,Long transmission distance,The features such as being supported without base station,By from solar energy,Wind energy,Voltage transformer and site inspection equipment obtain the energy and adjust automatically operating mode is to adapt to energy consumption,So as to long-term,Efficiently ensure the connection of power distribution network communication.

Description

A power distribution terminal communication system

technical field

The utility model relates to the technical field of distribution network communication, in particular to a distribution terminal communication system.

Background technique

Distribution automation is a concept put forward by western developed countries in the 1970s, and it has been fully developed in Japan, Europe and the United States. There are also many attempts in China, but they are mainly concentrated in cities. Distribution automation organically integrates the monitoring, protection, control, measurement, and work management of the power supply department of the distribution network under normal and accidental conditions, improves the quality of power supply, and establishes a closer and more responsible relationship with users. The price meets the diversity of user requirements, and strives to provide the best power supply economy.

At present, most distribution network automation systems can also monitor the operation status of the distribution network and change the operation mode by remote control when the distribution network is operating normally, and can detect faults in time. However, the current distribution automation of the power system mainly It still relies on the public network for uplink transmission of telemetry data. In remote suburbs, due to the poor network of the public network, or even no public network signal, the telemetry data of distribution automation cannot be uploaded to the master station. This is the distribution automation terminal. In an unsupervised state, it is impossible to understand the working information of the distribution line.

For places where there is no public network or the public network signal is poor, there are generally three solutions, namely wireless ad hoc network, microwave station, and optical fiber. In the field of power dispatching, microwave stations and optical fibers are commonly used due to high requirements for real-time, reliability, and security, but these two methods are high-input and high-cost. In the field of distribution automation, the requirements for real-time, reliability, and security are relatively low, and there are many nodes in distribution automation, which are very sensitive to cost, so wireless communication is widely used.

At present, there are WIFI, Bluetooth, GPRS, 3G, and 4G wireless autonomous network methods. WIFI has high transmission rate, but short transmission distance and high power consumption; Bluetooth has high transmission rate, low power consumption but short transmission distance; GPRS coverage It is large but needs to rely on infrastructure construction; 3G and 4G have high transmission rates, but they also rely on infrastructure construction and require dense base station support.

The wireless technologies that make up the local area network mainly include 2.4GHz WiFi, Bluetooth, Zigbee, etc. The wireless technologies that make up the wide area network mainly include 2G/3G/4G, etc. These wireless technologies have obvious advantages and disadvantages. Before the emergence of Low Power Wide Area Network (LPWAN), it seems that there is only one choice between long-distance and low power consumption; when LPWAN technology is adopted, designers Both can be achieved, maximizing longer distance communication and lower power consumption, while saving additional repeater costs.

LoRa is one of the LPWAN communication technologies. It is an ultra-long-distance wireless transmission scheme based on spread spectrum technology adopted and promoted by Semtech in the United States. This solution changes the previous trade-off between transmission distance and power consumption, and provides users with a simple system that can achieve long-distance, long battery life, and large capacity, and then expand the sensor network. At present, LoRa mainly operates in free frequency bands around the world, including 433, 868, 915 MHz, etc. LoRa technology has the characteristics of long distance, low power consumption (long battery life), multi-node, and low cost.

Utility model content

The utility model provides a power distribution terminal communication system, which is used to solve the problem that the transmission power consumption, transmission rate, transmission data volume and transmission distance cannot be well matched in the existing distribution network using wireless communication, and most of them need to rely on infrastructure to provide communication support. Technical problems leading to high construction costs.

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

A power distribution terminal communication system, comprising a data collection device, a data concentrator, a network server and a monitoring terminal, the data collection device is wirelessly connected to the data concentrator, the data concentrator is connected to the network server through a network, the The network server is connected with the monitoring terminal;

The data acquisition device includes at least one;

The data acquisition device includes a LoRa terminal main control module, a parameter input control module, a data acquisition interface module, a power-taking module, and a data transceiver module. The first interface of the LoRa terminal main control module is connected with the parameter input control module, and the LoRa terminal main control module The second interface of the control module is connected to the data acquisition interface module, the third interface of the LoRa terminal main control module is connected to the power-taking module, and the fourth interface of the LoRa terminal main control module is connected to the data transceiver module;

The LoRa terminal main control module includes a microcomputer controller and a LoRa wireless transmission unit. The LoRa terminal main control module is used to receive and process the information transmitted by the data acquisition interface module, and then send it to the data center through the data transceiver module. device;

The parameter input control module includes a button unit and a display unit, and the parameter input control module is used to input control instructions to the LoRa terminal main control module;

The data acquisition interface module is used to connect with various detection devices on site and obtain detection data;

The data transceiving module includes a transmitting antenna for transmitting data to the data concentrator through radio waves;

The power taking module includes a transformer unit, a lightning protection isolation filter unit, a first rectification and voltage stabilization unit, a channel switching unit, a solar panel unit, a second rectification unit, a wind energy generator unit, a lightning protection unit, and a rectification, filtering and voltage stabilization unit. unit, the transformer unit is connected to the incoming line end of the lightning protection isolation filter unit, the outgoing line end of the lightning protection isolation filter unit is connected to the incoming line end of the first rectification and voltage stabilization unit, and the outgoing line end of the first rectification and voltage stabilization unit is connected to the first line end of the channel switching unit Two interfaces are connected; the solar panel unit is connected to the incoming line end of the second rectification unit, and the outgoing line end of the second rectifying unit is connected to the third interface of the channel switching unit; the wind energy generator unit is connected to the incoming line end of the lightning protection unit for lightning protection The outlet end of the unit is connected to the inlet end of the rectification filter voltage stabilization unit, and the outlet end of the rectification filter voltage stabilization unit is connected to the fourth interface of the channel switching unit; the first channel switching unit is connected to the third interface of the main control module of the LoRa terminal;

The channel switching unit includes a peak-to-peak detection unit and an IGBT conduction tube for detecting and switching a power circuit connected to the LoRa terminal main control module;

The wireless method is a LoRa wireless transmission method.

Preferably, the network is Ethernet or 3G, 4G network.

Preferably, the data collection interface module adopts 485 protocol for transmission.

Preferably, the transformer unit is composed of at least one voltage transformer, which is used to obtain electric energy from the detected circuit and provide it to the data acquisition device;

The lightning protection isolation filter unit includes a lightning protection device and a filter capacitor, and the lightning protection isolation filter unit is used for lightning protection and filtering processing of the electricity sent by the transformer unit;

Preferably, the solar panel unit consists essentially of solar panels.

Preferably, the data concentrator includes a data transceiving module for receiving the data sent by the data collection device and sending the data to the network server through the network.

The utility model adopts the unique characteristics of low energy consumption based on LoRa technology, and the transmission distance does not require the support of the base station. By obtaining energy from solar energy, wind energy, voltage transformers and on-site inspection equipment and automatically adjusting the working mode to adapt to energy consumption, it can Long-term, high-efficiency guarantee of distribution network communication connection.

Description of drawings

Fig. 1 is the overall structure block diagram of the embodiment provided by the utility model;

Fig. 2 is a structural block diagram of the data acquisition device in the embodiment provided by the utility model;

Fig. 3 is a structural block diagram of the power-taking module in the embodiment provided by the utility model.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with Figures 1-3 in the embodiments of the present utility model. Obviously, the described The embodiments are some embodiments of the present utility model, but not all embodiments. The detailed description of embodiments of the invention generally described and illustrated in the drawings herein is not intended to limit the scope of the invention as claimed, but merely represents selected embodiments of the invention. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Fig. 1 is the overall structural block diagram of the embodiment provided by the utility model, Fig. 2 is the structural block diagram of the data acquisition device in the embodiment provided by the utility model, Fig. 3 is the structural block diagram of the power-taking module in the embodiment provided by the utility model, as As shown in Figure 1-3, a power distribution terminal communication system includes a data acquisition device, a data concentrator, a network server, and a monitoring terminal. The data acquisition device is connected to the data concentrator through LoRa wireless transmission, and the data concentrator is connected through Ethernet. Or 3G, 4G network is connected to the network server, and the network server is connected to the monitoring terminal;

The data acquisition device includes at least one, and the present embodiment adopts four, which are respectively connected with the device for collecting the three-phase current and voltage of the overhead line;

The data acquisition device includes a LoRa terminal main control module, a parameter input control module, a data acquisition interface module, a power acquisition module, and a data transceiver module. The first interface of the LoRa terminal main control module is connected to the parameter input control module, and the second LoRa terminal main control module The interface is connected to the data acquisition interface module, the third interface of the LoRa terminal main control module is connected to the power-taking module, and the fourth interface of the LoRa terminal main control module is connected to the data transceiver module;

The main control module of the LoRa terminal includes a microcomputer controller and a LoRa wireless transmission unit. The main control module of the LoRa terminal is used to receive and process the information transmitted by the data acquisition interface module, and then send it to the data concentrator through the data transceiver module;

The parameter input control module includes a button unit and a display unit, and the parameter input control module is used to input control instructions to the main control module of the LoRa terminal;

The data acquisition interface module adopts 485 protocol transmission, including but not limited to FTU, RTU, TTU protocol connection, used to connect with various detection devices on site and obtain detection data;

The data transceiver module includes a transmitting antenna for transmitting data to the data concentrator through radio waves;

The power taking module includes a transformer unit, a lightning protection isolation filter unit, a first rectification and voltage stabilization unit, a channel switching unit, a solar panel unit, a second rectification unit, a wind generator unit, a lightning protection unit, and a rectification, filtering and voltage stabilization unit. The transformer unit is connected to the inlet end of the lightning protection isolation filter unit, the outlet end of the lightning protection isolation filter unit is connected to the inlet end of the first rectification and voltage stabilization unit, and the outlet end of the first rectification and voltage stabilization unit is connected to the second interface of the channel switching unit; The solar panel unit is connected to the incoming line end of the second rectification unit, and the outgoing line end of the second rectifying unit is connected to the third interface of the channel switching unit; the wind energy generator unit is connected to the incoming line end of the lightning protection unit, and the outgoing line end of the lightning protection unit is connected to the rectification filter The input terminal of the voltage stabilizing unit is connected, and the outlet terminal of the rectifying and filtering voltage stabilizing unit is connected to the fourth interface of the channel switching unit; the first channel switching unit is connected to the third interface of the main control module of the LoRa terminal;

The channel switching unit includes a peak-to-peak detection unit and an IGBT conduction tube, which are used to detect and switch the power circuit connected to the main control module of the LoRa terminal;

in,

The transformer unit is composed of at least one voltage transformer, which is used to obtain electric energy from the detected circuit and provide it to the data acquisition device;

The lightning protection isolation filter unit includes a lightning protection device, a filter capacitor, and the lightning protection isolation filter unit is used for lightning protection and filtering processing of the electricity sent by the transformer unit;

The solar panel unit is mainly composed of solar panels;

The data concentrator includes a data transceiver module, which is used to receive the data sent by the data collection device and send the data to the network server through the network.

The power-taking module mainly takes power from the line to supply power to the central control module. There are three power-taking modes inside the power-taking device, one is to take power from the data acquisition interface module, the other is to take power from the voltage transformer and solar battery, and the third is to take power from the data acquisition interface module. One is to draw electricity from wind turbines. When the line does not have a voltage transformer or it is inconvenient to install a voltage transformer, the power taking module takes power from the solar battery or the wind generator. If there is continuous long-term rainy weather or the solar panel is damaged, it will take power from the wind turbine or the data acquisition interface module, and at the same time send the current power-taking mode signal to the main control module. Small, the main control module works in low power consumption mode, reduce the internal bus clock frequency of the main processor, intermittently turn on or off the peripherals that the internal processor of the main control module does not often work, increase the communication time interval, and set the Lora terminal main control The module reduces the signal transmission power and increases the proportion of redundant codes at the same time, so as to ensure that the power consumption of the system does not exceed the supply capacity of the current power-taking mode when the system realizes basic functions. When there is a voltage transformer externally, the power-taking module takes power from the voltage transformer. At this time, the power supply capacity for the main control module is relatively strong, and the main control module can work in the highest performance mode to update the information of the line collection interface. Dense, faster uploads.

The power-taking module is composed of a voltage transformer, a lightning protection isolation filter module, and a rectification and voltage stabilization module under the working condition of taking power from the voltage transformer. The power-taking module is composed of a peak-to-peak detection unit, It is composed of IGBT conduction tube, automatic threshold setting module, and rectification and voltage stabilization module. Among them, the peak-to-peak detection unit is used to detect the peak-to-peak voltage of the line acquisition interface. The automatic threshold setting module automatically sets a threshold according to the peak-to-peak value. When it is greater than this threshold, a driving signal is sent to control the conduction of the IGBT tube. That is, it can flow out and enter the sorting and stabilizing device to output electric energy to the main control module. Relying on the peak-to-peak detection module and the automatic threshold control module, the power-taking operation is performed only when the voltage of the data acquisition interface is higher than the logic voltage that the main control module can recognize, so that the data acquisition interface and the main The normal operation of the control module.

In order to ensure the efficiency and accuracy of data transmission, the data acquisition device modulates the signal before transmitting the data to the data concentrator. The modulation method is as follows: 1. Produce a sine wave with a frequency; 2. Input the code of the module according to the parameters Rate parameter, set the conversion range of the sine wave, if the code rate control is set to 125KHz, the conversion range of the sine wave is 125KHz, if the code rate control is set to 250KHz, the conversion range of the sine wave is 250KHz, if the code rate control is set to 500KHz, the conversion range of the sine wave is 500KHz; 3. The frequency change law of the sine wave varies according to the input data, including but not limited to the following conversion methods: when the data is 1, the sine wave changes from low frequency to high frequency , when the data is 0, the sine wave changes from high frequency to low frequency; or when the data is 0, the sine wave changes from low frequency to high frequency, when the data is 1, the sine wave changes from high frequency to low frequency; Or when the data is 1, the frequency of the sine wave first becomes higher and then lower; when the data is 0, the frequency of the sine wave first becomes lower and then higher; or when the data is 0, the frequency of the sine wave first becomes higher and higher Lower, when the data is 1, the frequency of the sine wave first becomes lower and then higher; or when the data is 1, the frequency of the sine wave changes within the maximum setting range, when the data is 0, the frequency of the sine wave is within the maximum setting range half of the conversion; or when the data is 0, the sine wave frequency is converted within the maximum setting range, and when the data is 1, the sine wave is converted within half of the maximum setting range.

The utility model adopts the unique characteristics of low energy consumption based on LoRa technology, and the transmission distance does not require the support of the base station. By obtaining energy from solar energy, wind energy, voltage transformers and on-site inspection equipment and automatically adjusting the working mode to adapt to energy consumption, it can Long-term, high-efficiency guarantee of distribution network communication connection.

Claims (6)

1. A power distribution terminal communication system, characterized in that: It includes a data collection device, a data concentrator, a network server and a monitoring terminal, the data collection device is wirelessly connected to the data concentrator, the data concentrator is connected to the network server through the network, and the network server is connected to the monitoring terminal; The data acquisition device includes at least one; The data acquisition device includes a LoRa terminal main control module, a parameter input control module, a data acquisition interface module, a power-taking module, and a data transceiver module, and the first interface of the LoRa terminal main control module is connected with the parameter input control module, and the LoRa terminal main control module The second interface of the control module is connected to the data acquisition interface module, the third interface of the LoRa terminal main control module is connected to the power-taking module, and the fourth interface of the LoRa terminal main control module is connected to the data transceiver module; The LoRa terminal main control module includes a microcomputer controller and a LoRa wireless transmission unit. The LoRa terminal main control module is used to receive and process the information transmitted by the data acquisition interface module, and then send it to the data center through the data transceiver module. device; The parameter input control module includes a button unit and a display unit, and the parameter input control module is used to input control instructions to the LoRa terminal main control module; The data acquisition interface module is used to connect with various detection devices on site and obtain detection data; The data transceiving module includes a transmitting antenna for transmitting data to the data concentrator through radio waves; The power taking module includes a transformer unit, a lightning protection isolation filter unit, a first rectification and voltage stabilization unit, a channel switching unit, a solar panel unit, a second rectification unit, a wind energy generator unit, a lightning protection unit, and a rectification, filtering and voltage stabilization unit. unit, the transformer unit is connected to the incoming line end of the lightning protection isolation filter unit, the outgoing line end of the lightning protection isolation filter unit is connected to the incoming line end of the first rectification and voltage stabilization unit, and the outgoing line end of the first rectification and voltage stabilization unit is connected to the first line end of the channel switching unit Two interfaces are connected; the solar panel unit is connected to the incoming line end of the second rectification unit, and the outgoing line end of the second rectifying unit is connected to the third interface of the channel switching unit; the wind energy generator unit is connected to the incoming line end of the lightning protection unit for lightning protection The outlet end of the unit is connected to the inlet end of the rectification filter voltage stabilization unit, and the outlet end of the rectification filter voltage stabilization unit is connected to the fourth interface of the channel switching unit; the first channel switching unit is connected to the third interface of the main control module of the LoRa terminal; The channel switching unit includes a peak-to-peak detection unit and an IGBT conduction tube for detecting and switching a power circuit connected to the LoRa terminal main control module; The wireless method is a LoRa wireless transmission method. 2. The power distribution terminal communication system according to claim 1, characterized in that: The network is Ethernet or 3G, 4G network. 3. The power distribution terminal communication system according to claim 1, characterized in that: The data acquisition interface module adopts 485 protocol for transmission. 4. The power distribution terminal communication system according to claim 1, characterized in that: The transformer unit is composed of at least one voltage transformer, which is used to obtain electric energy from the detected circuit and provide it to the data acquisition device; The lightning protection isolation filter unit includes a lightning protection device and a filter capacitor, and the lightning protection isolation filter unit is used for lightning protection and filtering processing of the electricity sent by the transformer unit. 5. The power distribution terminal communication system according to claim 1, characterized in that: The solar panel unit is mainly composed of solar panels. 6. The power distribution terminal communication system according to claim 1, characterized in that: The data concentrator includes a data transceiving module, which is used to receive the data sent by the data collection device and send the data to the network server through the network.