CN104734363B - A kind of High-low voltage switch cabinet system based on Internet of Things - Google Patents

Abstract

The invention discloses a high and low voltage switchgear system based on the Internet of Things, which is characterized in that the high and low voltage switchgear system includes: a switchgear main control unit and an intelligent router unit; the intelligent router unit is used to establish all the switches in the power supply station The main control unit of the cabinet is connected with the client through the cloud server, and is used to construct a virtual local area network; the main control unit of the switch cabinet converts the power signal received regularly into power information; and comprehensively judges the workload of the power information. The invention can update and debug the remote system files of the switchgear, as well as autonomous trip control, and carry out remote monitoring and control on the switchgear according to the transmitted power information, thereby improving the intelligence of the electrical equipment, enhancing the monitoring ability and reliability of the equipment controlling.

Description

A high and low voltage switchgear system based on the Internet of Things

technical field

The invention relates to the field of monitoring of power environment data, in particular to a high and low voltage switchgear system based on the Internet of Things.

Background technique

As a kind of electrical equipment, the switchgear is mainly used to open and close, control and protect electrical equipment during the process of power generation, transmission, distribution and power conversion in the power system. At present, my country's switchgear is gradually developing in the direction of intelligence, but compared with developed countries, there is still a significant gap.

First of all, domestic switchgear mainly adopts the method of regular maintenance, which is too blind and may cause unnecessary power outage losses; secondly, when an emergency occurs, maintenance personnel need to arrive at the scene for maintenance, which delays maintenance time and increases losses. There are many incoming line cabinets in the power distribution room, and there are switches for controlling the on-off of equipment, and instrumentation equipment for monitoring and protecting the entire transmission line. Regularly, it is easy to cause inaccurate maintenance forecasts and long maintenance delays. It is also impossible to browse the data and status of the switch cabinet anytime and anywhere, and to control the switch cabinet accordingly.

In order to detect the stability of the voltage and current, various sensors are installed to monitor the switch, and the monitored signal is sent to the master station, mainly including the temperature, voltage, current and other indicators of the sensor, but the current switch cabinet is not intelligent. To achieve "intelligence" in the true sense, most of them have the following problems:

1) Ineffective real-time monitoring: many monitoring of switchgear is based on timing monitoring. In case of abnormality, there is no sufficient response and early warning behavior. , The characteristics of effectiveness Send warning or abnormal information in real time, the time from capturing abnormality to sending may cause the instability of parameter data and voltage overload and other consequences. Therefore, failure to adopt a specific collection and forwarding method at a specific time has caused the problem that effective real-time monitoring cannot be performed.

2) Lack of autonomy: due to the initial stage of intelligence, this stage lacks technical support for the processing of acquired parameters and lacks self-diagnosis technical support, so the captured state parameters, characteristic parameters, environmental parameters, etc., have not passed intelligent control in time The way to deal with it still depends on the relevant verification of personnel technology and the analysis of operating status to make processing behaviors. The intervention of personnel on detection, diagnosis analysis, and fault reporting directly affects the "intelligence" of products, and the lack of product autonomy It has also become an important problem faced by the current primary stage.

3) The maintenance of the switchgear system is inconvenient: because the traditional layout uses an ordinary router, it can only communicate with the server. When the personnel are not on site and the switchgear system is in urgent need of maintenance, the entire system will be paralyzed.

Contents of the invention

In order to overcome the shortcomings of the above-mentioned prior art, the present invention provides a high and low voltage switchgear system based on the Internet of Things; it is expected to perform remote system file update and debugging on the switchgear, as well as autonomous trip control, and according to the transmitted power Information is used to remotely monitor and control the switchgear, thereby improving the intelligence of electrical equipment and enhancing the monitoring capability and controllability of the equipment.

The present invention adopts following technical scheme for reaching above-mentioned purpose of the invention:

The present invention is a high-voltage and low-voltage switchgear system based on the Internet of Things, which is applied in an Internet of Things environment composed of several power supply stations and clients through a cloud server, and the Internet of Things environment is used for monitoring and accessing power information of transmission lines ; The power supply station connects the upstream power supply equipment and the downstream power consumption equipment through the transmission line; each power supply station is provided with several high and low voltage switch cabinets connected with the transmission line; each high and low voltage switch cabinet is provided with power The characteristics of the information monitoring instrument are,

The high and low voltage switch cabinet system includes: a switch cabinet main control unit and an intelligent router unit;

The intelligent router unit is arranged in each power supply station;

The power information monitoring instrument in each high and low voltage switchgear is equipped with a corresponding switchgear main control unit;

Any power information monitoring instrument collects the corresponding power signal on the transmission line according to the set collection period, and transmits it to the corresponding switch cabinet main control unit through the RS485 bus;

The client accesses any switch cabinet main control unit through the cloud server, and sends a control command to the corresponding switch cabinet main control unit through the intelligent router unit;

The intelligent router unit is used to establish the connection between all switch cabinet main control units in the power supply station and the client through the cloud server, and is used to construct a virtual local area network; the virtual local area network is formed by the intelligent router unit in each power supply station , and access and modify and debug built-in program files through the client;

The main control unit of the switchgear converts the regularly received electric power signal into electric power information according to the collection period; and makes a comprehensive judgment on the workload of the electric power information: if the electric power information exceeds the set early warning value, It means that the power information is in an abnormal state; immediately send the power information in the abnormal state to the cloud server through the intelligent router unit in a wired or wireless manner; if the power information exceeds the set danger value, it means that the power information is in an abnormal state; automatically close the relay switch on the main control unit of the switchgear, cut off the downstream electrical equipment, and send the power information in the abnormal state to the cloud server; otherwise it means The power information is in a normal state, and the power information in the normal state is sent to the cloud server according to the set sending cycle.

The high and low voltage switchgear system based on the Internet of Things of the present invention is also characterized in that the power information monitoring instrument includes:

Intelligent power detector YTZJ-1 with RS485 communication interface, switch state meter YT9300 and comprehensive protection meter WDD-1BG, the connection relationship is that the pins with the same name are connected in parallel;

The intelligent power detector YTZJ-1 is used to detect the current and voltage information of the transmission line and the useful power, reactive power and power factor of the downstream electrical equipment;

The switch state instrument YT9300 is used to detect the switch state of downstream electrical equipment;

The comprehensive protection instrument WDD-1BG is used for monitoring, protecting and feeding back the downstream power supply equipment.

A monitoring forwarding unit and a web service end are arranged on the cloud server;

The monitoring and forwarding unit monitors the received power information collected and sent from the main control unit of the switchgear through the TCP long connection and forwards it to the web server for display.

The composition of the main control unit of the switch cabinet includes: a relay circuit module, an RS485 interface drive circuit module, an Ethernet interface module, a WIFI module of a USB interface, and an industrial control main board;

The industrial control main board is the core processing unit, and controls the opening and closing of the relay through the relay circuit module; receives the power signal sent by the power information monitoring instrument through the RS485 interface drive circuit module; and communicates with the power information monitoring instrument through the Ethernet interface module The intelligent router unit performs wired signal transmission; the WIFI module of the USB interface performs wireless signal transmission with the intelligent router unit.

The industrial control main board includes: an information processing module, a decision management module, an information fusion module, an intelligent control module, a network communication module and a global information resource pool for various information;

The information processing module uses the peripheral sensor module to obtain the corresponding power signal on the transmission line collected by the power information monitoring instrument for processing, obtains the current and voltage values and the switching status of the downstream electrical equipment and transmits the information through the network communication module sending the global information resource pool for storage;

The decision management module is used to receive the collection cycle and sending cycle set by the client; and judge the current and voltage values and the switching status of the downstream electrical equipment according to the information stored in the global information resource pool, if Normal state, then upload to the cloud server according to the sending cycle, if it is an abnormal state and an abnormal state, then upload to the cloud server immediately through the network communication module and send an alarm signal to the cloud server; Send a power-off signal to the relay circuit module at any time;

The information fusion module is used to package the current and voltage values of all power information monitoring instruments obtained by the information processing module and the switch states of downstream electrical equipment;

The intelligent control module is used to receive the control command sent by the client and send the global information resource pool for storage, and to control the circuit on-off of the relay circuit module connected to the industrial control main board.

Compared with the prior art, the beneficial effects of the present invention are reflected in:

1. By setting the power information monitoring instrument, the main control unit of the switchgear, the intelligent router, the cloud server and the client, the present invention can perform autonomous trip control in the case of unattended, and protect the safety of the downstream electrical equipment and the switchgear system, And can carry out real-time information reminder through the client, and then monitor the power information and control the working conditions of downstream electrical equipment; thus improving the intelligence of electrical equipment, enhancing the monitoring ability and controllability of equipment; thereby reducing It shortens the time for maintenance personnel to diagnose the cause of the failure, reduces the time of maintenance downtime, that is, minimizes the power outage time, reduces the overall work intensity of maintenance personnel and even reduces maintenance personnel, thereby improving the overall reliability of the system and the entire system. The economic benefit of the substation reduces the work intensity of the staff.

2. The intelligent router unit adopted in the present invention is an open source router, and uses a 3G or 4G network card to network, and uses the N2N application embedded in the intelligent router to construct a virtual local area network within a wide area, which is convenient for the state of the main control unit of the switch cabinet Information and routers use flow information to monitor, and update and debug the internal program files of the main control unit of the switchgear; thereby realizing the monitoring and management of information on the network environment, flow, and equipment status of each site, enabling operators to remotely Real-time understanding of switchgear information and remote debugging of switchgear for easy monitoring and management.

3. The present invention solves the problem that a TCP long connection cannot be established between the server and the router by setting the listening and forwarding unit of the cloud service, and realizes remote real-time display, monitoring and control by setting the WEB server end, so that the software and hardware of each part of the system Get a good correlation, and smoothly make various data information transfer, conversion and intuitive display.

4. The power information monitoring instrument of the present invention is composed of a variety of instruments with RS485 bus interfaces for monitoring the current, voltage, line temperature, and switch status of electrical equipment and is arranged in the switch cabinet; the main control unit of the switch cabinet calls The built-in RS485 communication protocol, after connecting the power information monitoring instruments with RS485 bus in parallel, obtains the information monitored by the power information monitoring instruments in turn in a polling manner; so that the information of multiple testing instruments can be monitored at the same time , improve work efficiency; because it does not need to be directly connected to the computer, it avoids the problem that only the RS232 interface on the computer needs to be converted to the RS485 interface.

5. In the past technology, the data collected by the instrument is often directly forwarded to the server for processing according to the set cycle; and the present invention processes the collected information by setting the information processing module of the main control unit of the switchgear, so that no The corresponding power information can be obtained through network communication, so that the monitoring and management of information is faster and not affected by the network.

6. By adopting the main control unit of the switchgear, the present invention can take into account multiple power information monitoring instruments at the same time, and compare the collected information with the information of the resource pool at the switchgear, automatically make a comprehensive judgment and perform related switch control actions At the same time, the collected information is forwarded through the router according to the set requirements, so that the equipment can be detected and controlled without the need for human presence.

7. The present invention uses the Linux operating system inside the industrial control motherboard to call the RS485 interface driver, communicate with the monitoring instrument for data collection, and call the USB communication interface to connect the WIFI module for Internet interconnection. When the wireless signal is easily interfered, it can be connected through The network cable is connected to the LAN port of the intelligent router for network communication, so as to facilitate the access of peripheral interfaces, data transmission and network connection, without the need for setting and programming of external control chips.

8. The present invention sets the decision-making management module on the industrial control main board, and sets the acquisition cycle and transmission cycle of the signal, compares the collected data with the set threshold, and judges whether it is within the normal range; range value, send the power information monitored by multiple power information monitoring instruments packaged by the information fusion module according to the set sending cycle; Sending; when it is judged to be in the abnormal range, the intelligent control unit is used to perform trip control, so that the connected relay circuit module executes the trip command to cut off the power supply of the downstream electrical equipment, and immediately sends the abnormal value and the information of the instrument to the client. After setting a collection cycle different from the sending cycle, on the one hand, increasing the frequency of monitoring data collection increases the accuracy of data monitoring, and on the other hand, reducing the number of sending times can reduce the network communication traffic of the entire system and reduce costs.

Description of drawings

Fig. 1 is a structural diagram of the high and low voltage switchgear system of the present invention;

Fig. 2 is a structural diagram of the independent unit of the high and low voltage switchgear of the present invention;

Fig. 3 is a working principle diagram of the intelligent router unit of the present invention;

Fig. 4 is a working principle diagram of the main control unit of the switchgear of the present invention;

Fig. 5 is a flow chart of cloud server information processing in the present invention.

detailed description

As shown in Figure 1, in this embodiment, a high-voltage and low-voltage switchgear system based on the Internet of Things is applied to an Internet of Things environment composed of several power supply stations and clients through cloud servers, and the Internet of Things environment is used for monitoring and access to the power information of the transmission line; the power supply station connects the upstream power supply equipment and the downstream power consumption equipment through the transmission line; each power supply station is equipped with several high and low voltage switch cabinets connected with the transmission line; each high and low voltage switch cabinet has Equipped with power information monitoring instruments;

Since the value of the power information detection instrument in the high and low switch cabinet system changes in real time, there is a certain delay in the value transmitted to the server remotely, and it is impossible for people to observe the value of the power information monitoring instrument all the time. This requires direct monitoring of power information monitoring instruments and judgment on whether downstream users supply power, and uploads relevant power information and judgment processing information to notify remote monitoring staff.

In the current existing technology, the power information monitoring instrument with RS485 bus can be connected with the computer client through the RS232 converter, and can be monitored through the upper computer software located in the computer; however, all monitoring requires personnel to be in the local environment. Real-time monitoring; while the monitoring system displayed through the web server often directly sends data to the server, and the server performs processing, display and execution of operation commands, which is more dependent on the network.

The high and low voltage switchgear system in this embodiment includes: a switchgear main control unit and an intelligent router unit;

An intelligent router unit is set in each power supply station;

The power information monitoring instrument in each high and low voltage switchgear is equipped with a corresponding switchgear main control unit;

Any power information monitoring instrument collects the corresponding power signal on the transmission line according to the set collection period, and transmits it to the corresponding switch cabinet main control unit through the RS485 bus;

In the specific implementation, the power information monitoring instruments include: intelligent power detector YTZJ-1 with RS485 communication interface, switch status meter YT9300 and comprehensive protection meter WDD-1BG, the connection relationship is that the pins with the same name are connected in parallel;

Intelligent power detector YTZJ-1, used to detect the current and voltage information of the transmission line and the useful power, reactive power and power factor of the downstream electrical equipment;

Switch state meter YT9300, used to detect the switch state of downstream electrical equipment; for example, the closing/opening state of the circuit breaker, the electrified state of each phase line;

Comprehensive protection instrument WDD-1BG, for the backup protection of the step-down transformer, installed on the power supply side of the transformer; used to monitor, protect and feed back the downstream power supply equipment; for example, monitor light gas, heavy gas, current long time delay protection, current short Time-delay protection, current quick-break protection and zero-sequence current information.

The power information monitoring instrument with RS485 interface can output the value related to the power information, and it can be obtained by converting the formula through the setting of the corresponding equipment. Devices that transmit data through the RS485 bus can be connected in parallel. The data acquisition device sends a read request to the device that needs to collect information through polling. After obtaining the information of the corresponding device, it then collects the information of the next device. Request.

The client accesses any switchgear master control unit through the cloud server, and sends control commands to the corresponding switchgear master control unit through the intelligent router unit;

The client is composed of a WEB page server and an Android mobile phone client. Therefore, the mobile phone with the client software, the computer without the client software but able to log in to the web page, and the mobile electronic device terminal use a specific IP address to perform switch cabinet information. Preview and control the switchgear accordingly.

The Android client realizes the handheld monitoring of the switchgear, and is mainly composed of three modules: the interface display module, the data communication module and the data processing module. The whole system is realized by the mobile terminal and the background server. The background server provides a data interface for the mobile terminal, and the mobile terminal sends a post request through the http protocol to query and receive the background data in real time. The mobile terminal parses and encapsulates the received data according to the communication protocol, and then displays it through the foreground activity.

The intelligent router unit is used to establish the connection between the main control units of all switch cabinets in the power supply station through the cloud server and the client, and is used to build a virtual local area network; Access and modification and debugging of built-in program files;

As shown in Figure 3, the internal program of the intelligent router unit is composed of a traffic management module, an exception handling module, a node status module, a remote access module, a remote access module, and a file transfer module, and is connected to the external network through an external 3G/4G module , the physical network can realize data transmission between the main control unit of the switchgear and the cloud server, and by transplanting N2N applications, the router can not only realize the basic function of connecting the physical network, but also build a virtual local area network link module, A virtual local area network is formed between remote routers that are also installed with N2N applications, which facilitates the transfer of files to the main control unit of the switch cabinet and the debugging of the main control unit of the switch cabinet.

Remote users or other router nodes are all EDGE in the N2N network, and the cloud server, as a SUPERNODE, is a "transfer station" for data between each EDGE node; the remote access module in the node is the EDGE terminal in the N2N network, Provide a separate process to enable the system to implement P2P connection services. The remote access module provides the communication interface between the router itself and the main control unit of the switch cabinet, and implements remote access to the main control unit of the switch cabinet by transplanting TELNET-CLIENT on the router through the TELNET service. In the file transfer module, the data is transferred through the FTP protocol.

The traffic management module can detect the traffic usage of the smart router, provide a data analysis basis for the usage of the 3G/4G module, and serve as the basis for the traffic package selection strategy. The exception handling module automatically restarts the router when the router network is poor or disconnected, and connects the devices at the lower end of the router to the server. The node status module will automatically record the time point when the router is abnormal and the time node when it returns to normal, and initially detect the cause of the router's network disconnection, and save the information until the next time the network is normal and send it to the cloud server.

The intelligent router unit, on the one hand, performs the routing function, which can forward the next-hop routing of the transmitted master control unit data information, and can also receive the data connection request from the remote server. On the other hand, transplanting N2N applications on routers enables routers and other nodes (including any nodes using N2N applications) to form a virtual local area network within a wide area. Through this virtual local area network, information can be exchanged and collected, and at the same time A remote computer can perform remote access to the router. Through the virtual local area network, the software of the switchgear unit can be updated and debugged in any place where the Internet can be accessed, so that the debugging of the switchgear is not restricted by the region. When people are not in the local area or the environment where the switchgear unit is located is not suitable for people to enter When increasing the possibility of switchgear commissioning.

The acquisition cycle of the main control unit of the switchgear converts the regularly received power signal into power information through the formula provided by the instrument manufacturer; and makes a comprehensive judgment on the workload of the power information: if the power information exceeds the set early warning value, it means that the power The information is in an abnormal state; immediately send the power information in an abnormal state to the cloud server through the intelligent router unit in a wired or wireless manner; if the power information exceeds the set dangerous value, it means that the power information is in an abnormal state; automatically turn off the switch The relay switch on the main control unit of the cabinet cuts off the downstream electrical equipment, and sends the power information of abnormal state to the cloud server; otherwise, it indicates that the power information is in normal state, and sends the power information of normal state to the cloud server according to the set sending cycle Cloud Server. Among them, the collection cycle and the sending cycle are provided by the setting file located in the industrial control main board of the main control unit of the switch cabinet, and the file can be updated through the client.

The cloud server is provided with a monitoring and forwarding unit and a web server; the monitoring and forwarding unit monitors the received power information collected and sent from the main control unit of the switch cabinet through a long TCP connection and forwards it to the web server for display.

The internal monitoring and forwarding program can make the server and the industrial control board establish a TCP long connection, and start a separate thread to serve each connection request, and then receive and analyze the data. The socket information of the switchgear of each power distribution station will be stored in a global data structure, and the information sent by the switchgear master control unit will be sent to the web server program on the same server through inter-process communication. At the same time, the program receives the control command sent from the server, and analyzes the information of the corresponding switch cabinet in the control command, and searches the corresponding connection socket in the global data structure according to the information content according to a certain search strategy. After the search is successful, the control The command is forwarded to this socket, and the command is issued through this socket interface.

The internal monitoring and forwarding program connects and communicates with the router with the 3G network card through the network IP and specific port according to the TCP protocol, assigns threads to the internal program of the industrial control motherboard, and controls the relay for data reading. The internal monitoring and forwarding program sends the data obtained each time directly to the WEB interface through the server program. Both the mobile phone client and the WEB interface end are connected to the cloud server through the network communication protocol UDP.

The WEB server-side website is implemented with Python language and Django framework. The website platform mainly includes receiving data such as electric energy parameters, switch status information and protection information, dynamically displaying real-time data, and controlling the switch cabinet through the website platform. First, accept the JSON data sent by the listening and forwarding program, parse the JSON data and display it on the webpage. Since the data is updated in real time, this requires dynamic display on the webpage. Ajax technology is used here to achieve. The layout of the website adopts the bootstrap architecture, and the corresponding functions are realized through jQuery and corresponding plug-ins. Send the corresponding control information to the following program through the socket. Send text messages to users through third-party platforms through the website. At the same time, you can manage users through background management, set permissions and add, delete, and modify data. Users with different permissions can see different information.

As shown in Figure 5, the cloud server includes a network monitoring module, anomaly detection module, connection management module, data forwarding module, system log module, process communication module, information query module, trend prediction module, intelligent early warning module, and exception handling module , using the remote control module, process communication module, data processing module, database and global information resource pool; the cloud server establishes a data connection with the remote router through the network monitoring module, and sends the data through the connection management module according to the set sending cycle when the data is normal. Hand it over to the data forwarding module, and establish a corresponding process by monitoring the process communication module in the forwarding program module to transmit data with the process communication module in the cloud. When the data is abnormal, the data will be transmitted directly instead of according to the set sending cycle ; The data processing module of the cloud server can exchange the information in the process communication module, the database module and the global resource pool, and store them through the database; when the client has information to send to the switch cabinet, the remote control module will control The information is transmitted to the global information resource pool, and the information is transmitted to the process communication module through the data processing module, and then the data is transmitted to the outside; for the information fed back by the switchgear, the process communication module transmits it to the data processing module, and the data processing module compares The information stored in the database module is processed into the information that needs to be displayed on the WEB side, and the obtained power information and the trend of the power information are displayed through the information query module and the trend prediction module. By combining the power information with the global information resource pool After comparing the data, the intelligent early warning module will remind and display the abnormal state of the power information, and use the exception processing module to send a command to the server to call the third-party application to send a reminder message to the set mobile phone number; after receiving the reminder, the user Send control commands to the switchgear through the remote control module on the client interface.

During the whole process, the information of the switchgear will be displayed on the website and the mobile terminal. After logging in to the website or the mobile terminal, enter the user name and password. The users in the server system are strictly managed and divided into super administrators and administrator users. The administrator user can monitor the information of all switch cabinets in all projects, and can remotely control all switch cabinets at the same time; When a fault or abnormality occurs, the website will send the fault or abnormal information to the pre-set mobile phone number through SMS after data analysis, which is convenient for control.

In this embodiment, as shown in Figure 2, the composition of the main control unit of the switchgear includes: a relay circuit module, an RS485 interface drive circuit module, an Ethernet 100Base-T4 interface module, a WIFI module with a USB interface, and an 8-EM9280 industrial control motherboard;

8-EM9280 industrial control motherboard is the core processing unit, and controls the opening and closing of the relay through the relay circuit module; receives the power signal sent by the power information monitoring instrument through the RS485 interface drive circuit module; communicates with the intelligent router unit through the Ethernet 100Base-T4 interface module Wired signal transmission; wireless signal transmission through the WIFI module of the USB interface and the intelligent router unit.

The internal application program of the industrial control board initializes the entire device according to the content of the setting file, including how often to collect data, the IP and port number of the server to be sent, and then establishes a thread. Thread 1 collects data from the three sensors. , by sequentially sending device codes to communicate with corresponding devices and obtain information; thread 2 analyzes and detects the obtained data, and processes them into numbers recognizable by the server web page, integrates them into "JSON" and puts them in the queue, waiting to be sent to the server ; When the thread 3 meets the conditions for the data obtained by the thread 2, it connects to the local area network established by the router and communicates with the external network, and sends a connection request to the server. Each switchgear has one of these units, all connected to the router.

As shown in Figure 4, the industrial control motherboard includes: an information processing module, a decision management module, an information fusion module, an intelligent control module, a network communication module for transmitting information, and a global information resource pool for various information;

The information processing module uses the peripheral sensor module to obtain the corresponding power signal on the transmission line collected by the power information monitoring instrument for processing, and obtains the current and voltage values and the switching status of 0 and 1 representing whether the downstream electrical equipment is live and communicates through the network The module sends the global information resource pool for storage;

The decision management module is used to receive the collection cycle (once per second) and sending cycle (once per hour) set by the client; and to check the current and voltage values and whether the representative of the downstream electrical equipment is charged according to the information stored in the global information resource pool Judge the switch state of 0 and 1. If it is normal, it will be uploaded to the cloud server once according to the sending cycle 1h. If it is abnormal and abnormal, it will be uploaded to the cloud server through the network communication module and send an alarm to the cloud server. signal; at the same time, in an abnormal state, a power-off signal is sent to the relay circuit module;

The information fusion module is used to package the current and voltage values of all power information monitoring instruments obtained by the information processing module and the switch status of 0 and 1 representing whether the downstream electrical equipment is charged;

The intelligent control module is used to receive the control command sent by the client and send the global information resource pool for storage, and to control the circuit on-off of the relay circuit module connected to the industrial control main board.

Claims (1)

1. A high-voltage and low-voltage switchgear system based on the Internet of Things is applied in an Internet of Things environment composed of several power supply stations and clients through cloud servers, and the Internet of Things environment is used to monitor and access power information of transmission lines ; The power supply station connects the upstream power supply equipment and the downstream power consumption equipment through the transmission line; each power supply station is provided with several high and low voltage switch cabinets connected with the transmission line; each high and low voltage switch cabinet is provided with power Information monitoring instrument; It is characterized in that, The high and low voltage switch cabinet system includes: a switch cabinet main control unit and an intelligent router unit; The intelligent router unit is arranged in each power supply station; The power information monitoring instrument in each high and low voltage switchgear is equipped with a corresponding switchgear main control unit; Any power information monitoring instrument collects the corresponding power signal on the transmission line according to the set collection period, and transmits it to the corresponding switch cabinet main control unit through the RS485 bus; The client accesses any switch cabinet main control unit through the cloud server, and sends a control command to the corresponding switch cabinet main control unit through the intelligent router unit; The intelligent router unit is used to establish the connection between all switch cabinet main control units in the power supply station and the client through the cloud server, and is used to construct a virtual local area network; the virtual local area network is formed by the intelligent router unit in each power supply station , and access and modify and debug built-in program files through the client; The main control unit of the switchgear converts the regularly received electric power signal into electric power information according to the collection period; and makes a comprehensive judgment on the workload of the electric power information: if the electric power information exceeds the set early warning value, It means that the power information is in an abnormal state; immediately send the power information in the abnormal state to the cloud server through the intelligent router unit in a wired or wireless manner; if the power information exceeds the set danger value, it means that the power information is in an abnormal state; automatically close the relay switch on the main control unit of the switchgear, cut off the downstream electrical equipment, and send the power information in the abnormal state to the cloud server; otherwise it means The power information is in a normal state, and the power information in the normal state is sent to the cloud server according to the set sending period; The power information monitoring instrument includes: Intelligent power detector YTZJ-1 with RS485 communication interface, switch state meter YT9300 and comprehensive protection meter WDD-1BG, the connection relationship is that the pins with the same name are connected in parallel; The intelligent power detector YTZJ-1 is used to detect the current and voltage information of the transmission line and the useful power, reactive power and power factor of the downstream electrical equipment; The switch state instrument YT9300 is used to detect the switch state of downstream electrical equipment; The comprehensive protection instrument WDD-1BG is used for monitoring, protection and feedback of downstream power supply equipment; A monitoring forwarding unit and a web service end are arranged on the cloud server; The monitoring and forwarding unit monitors the received power information collected and sent from the main control unit of the switch cabinet through the TCP long connection and forwards the web server for display; The composition of the main control unit of the switch cabinet includes: a relay circuit module, an RS485 interface drive circuit module, an Ethernet interface module, a WIFI module of a USB interface, and an industrial control main board; The industrial control main board is the core processing unit, and controls the opening and closing of the relay switch through the relay circuit module; receives the power signal sent by the power information monitoring instrument through the RS485 interface drive circuit module; through the Ethernet interface module Perform wired signal transmission with the intelligent router unit; perform wireless signal transmission with the intelligent router unit through the WIFI module of the USB interface; The industrial control main board includes: an information processing module, a decision management module, an information fusion module, an intelligent control module, a network communication module and a global information resource pool for various information; The information processing module uses the peripheral sensor module to obtain the corresponding power signal on the transmission line collected by the power information monitoring instrument for processing, obtains the current and voltage values and the switching status of the downstream electrical equipment and transmits the information through the network communication module sending the global information resource pool for storage; The decision management module is used to receive the collection cycle and sending cycle set by the client; and judge the current and voltage values and the switching status of the downstream electrical equipment according to the information stored in the global information resource pool, if Normal state, then upload to the cloud server according to the sending cycle, if it is an abnormal state and an abnormal state, then upload to the cloud server immediately through the network communication module and send an alarm signal to the cloud server; Send a power-off signal to the relay circuit module at any time; The information fusion module is used to package the current and voltage values of all power information monitoring instruments obtained by the information processing module and the switch states of downstream electrical equipment; The intelligent control module is used to receive the control command sent by the client and send the global information resource pool for storage, and perform circuit on-off control on the relay circuit module connected to the industrial control main board; The cloud server also includes a network monitoring module, an abnormality detection module, a connection management module, a data forwarding module, an information query module, a trend prediction module, an intelligent early warning module, an exception handling module, a remote control module, a process communication module, and a data processing module. The global information resource pool on the module, the database and the cloud server; the cloud server establishes a data connection with the intelligent router unit through the network monitoring module, and gives the data to the data forwarding module by the connection management module according to the sending cycle set when the data is normal , and establish a corresponding process by monitoring the process communication module in the forwarding unit to transmit data with the process communication module of the cloud server. When the abnormality detection module detects that the data is abnormal, it will not follow the set sending cycle but directly transmit the data The data processing module of the cloud server transmits the information in the process communication module and the database and the global information resource pool on the cloud server to each other, and stores them through the database; when the client has information that needs to be sent to the switch cabinet, The remote control module transmits control information to the global information resource pool on the cloud server, transmits the information to the process communication module through the data processing module, and then transmits the data to the outside; for the information fed back by the switch cabinet, the process communication module Passed to the data processing module, the data processing module processes the information to be displayed by the WEB server by comparing the information stored in the database, and displays the obtained power information and the trend of the power information through the information query module and the trend prediction module After comparing the power information with the data of the global information resource pool on the cloud server, the intelligent early warning module is used to remind and display the abnormal state of the power information, and the exception processing module is used to send commands to the server to call third-party applications Send a reminder message to the set mobile phone number; after receiving the reminder, the user sends a control command to the switch cabinet through the remote control module on the client interface.