Implementation method of energy storage ems system based on mqtt bidirectional communication

Abstract

The invention discloses an implementation method of an energy storage ems system based on mqtt two-way communication, and belongs to the technical field of energy storage system communication methods.The implementation method of the energy storage ems system based on mqtt two-way communication comprises the following steps that a cloud server establishes an mqtt server, an ems local server is connected with the cloud server through a network, and in the active state of a client, the ems local server is connected with the cloud server through a network; the method comprises the following steps: establishing a connection with a cloud mqtt server, subscribing related themes when real-time data is needed, processing and displaying the real-time data after the real-time data is obtained, issuing a message to the theme subscribed by a local server when a client issues a command, and further processing the message after the local server receives the message. The mqtt two-way communication technology is adopted, real-time data acquisition is met, energy storage power station data real-time updating is guaranteed, command issuing can be met, the purpose of controlling an energy storage system is achieved, the overall operation efficiency is improved, the diversity of information pushing modes is increased, and the system operation efficiency and enterprise income are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of energy storage system communication methods, and specifically relates to an implementation method of an energy storage EMS system based on MQTT two-way communication. Background Art

[0002] With the rapid development of China's new energy industry and the continuous deepening of the energy revolution, energy storage, as a key support for the future development of the energy system, has increasingly become the focus of attention from all parties. Energy storage will be a key technology affecting the future energy pattern, and it is of great significance for the safe, stable, and efficient operation of its access to the energy system, improving the comprehensive energy utilization efficiency, promoting the development of the new energy industry, and driving the energy strategic transformation. Energy storage has a wide range of applications in the power system, covering all aspects of power generation, power transmission, power distribution, and end-users.

[0003] An energy management system (EMS) is an energy management solution designed to improve the flexibility and reliability of the power system. With the rapid development of renewable energy, how to effectively store and manage electric energy has become an important issue. EMS combines energy storage devices with intelligent management systems to achieve efficient utilization and scheduling of electric energy.

[0004] For mainstream EMS systems, most of them use the HTTP protocol for transmission. The client connects and communicates in the form of HTTP. The data collected by the system is transmitted to the client through HTTP, and the client then displays the data. HTTP is based on the request-response mode, that is, the communication can only be initiated by the client, and the server makes a response, stateless and connectionless.

[0005] When a conventional EMS system uses HTTP to respond to requests to collect background data, the client periodically sends an AJAX request to the server. After receiving the request, the server immediately returns the response information and closes the connection. This process can only be carried out passively, that is, the client sends a request to the server for a response, and the server cannot actively contact the client. It can only be initiated by the client. This characteristic of one-way request determines that if the server has continuous state changes, it will be very troublesome for the client to obtain information. Only "polling" can be used: every once in a while, an inquiry is sent to find out if there is new data on the server. This results in the inefficiency of data transmission in the EMS system, untimely alarms, potential safety hazards, low polling efficiency, and waste of network resources.

[0006] In view of this, the present invention provides an implementation method of an energy storage EMS system based on MQTT two-way communication. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to overcome the above-mentioned disadvantages of the prior art and provide an implementation method of an energy storage EMS system based on MQTT two-way communication.

[0008] The technical solution adopted to solve the above technical problems is as follows:

[0009] An implementation method of an energy storage EMS system based on MQTT two-way communication, and the specific implementation steps are as follows:

[0010] S1. The cloud server establishes an MQTT server;

[0011] S2. The EMS local server connects to the cloud server through the network and connects to the cloud MQTT server, publishes the collected real-time data through the topic and subscribes to the message topics to be received;

[0012] S3. When the client is in an active state, it establishes a connection with the cloud MQTT server. When real-time data is required, it subscribes to the relevant topic, processes and displays the real-time data after obtaining it;

[0013] S4. When the client issues a command, it can publish a message to the topic subscribed by the local server. After the local server receives the message, it further processes the message;

[0014] S5. The cloud server and the local server always maintain an uninterrupted connection and obtain the real-time data transmitted by the local server program in real time;

[0015] S6. The client only maintains a connection with the cloud server in an active state. When the client is closed or in an inactive state, the MQTT connection is disconnected.

[0016] An energy storage EMS system based on MQTT two-way communication, the energy storage EMS system includes a client, a cloud server and a local server, the client interface is displayed in the form of a web browser or an app, and the cloud server uses an MQTT server.

[0017] The beneficial effects of the present invention are as follows:

[0018] The present invention adopts MQTT two-way communication technology, which not only satisfies the acquisition of real-time data, ensures the real-time update of energy storage power station data, but also satisfies the command issuance, achieves the purpose of controlling the energy storage system, improves the overall operation efficiency, increases the diversity of information push methods, and improves the system operation efficiency and enterprise income. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a flow schematic diagram of the present invention;

[0020] Figure 2 It is a schematic diagram of the energy storage communication system of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0021] To make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0022] As Figure 2 shown, this embodiment provides an energy storage EMS system based on MQTT two-way communication. The energy storage EMS system includes a client, a cloud server, and a local server. The client interface is presented in the form of a web browser or an app. The cloud server uses an MQTT server, and the local server is an existing server of the energy storage system, and multiple local servers can be set up.

[0023] As Figure 1 shown, this embodiment provides an implementation method of an energy storage EMS system based on MQTT two-way communication. To solve the actual problem of communication lag in existing energy storage systems and make the information push method more diverse, a specific two-way communication method is disclosed, including the following steps:

[0024] S1. The cloud server establishes an MQTT server;

[0025] Establish an MQTT server, which is responsible for receiving, storing, processing, and forwarding data. Specifically, deploy MQTT server software such as Mosquitto, EMQ X, etc. on the cloud server side, and configure server parameters, including ports, authentication, encryption, etc.

[0026] To establish an MQTT server on the cloud server side, it is first necessary to select a suitable MQTT server software, such as Mosquitto or EMQ X, etc., and install and configure it. The following are the specific implementation steps:

[0027] 1. Select MQTT server software

[0028] According to requirements and resources, select a suitable MQTT server software. Mosquitto is a lightweight open-source MQTT server, suitable for most application scenarios; EMQ X is a high-performance and highly reliable MQTT server, suitable for large-scale distributed systems.

[0029] 2. Install the MQTT server

[0030] Taking Mosquitto as an example, first, it is necessary to install Mosquitto on the cloud server. For Linux systems based on Debian / Ubuntu, the following command can be used for installation:

[0031] sudo apt-get update

[0032] sudo apt-get install mosquitto mosquitto-clients

[0033] After the installation is complete, the Mosquitto service will start automatically.

[0034] 3. Configure server parameters

[0035] Next, you need to configure the Mosquitto server. The configuration file is usually located at / etc / mosquitto / mosquitto.conf. The main configuration parameters include:

[0036] Port setting: By default, Mosquitto listens on port 1883. You can modify the port according to your needs. For example:

[0037] port 1883

[0038] Authentication configuration: To ensure security, you can enable username and password authentication. First, you need to create a password file:

[0039] sudo mosquitto_passwd -c / etc / mosquitto / passwd username Then enable password authentication in the configuration file:

[0040] al low_anonymous false

[0041] password_file / etc / mosquitto / passwd

[0042] Encryption configuration: To protect the security of data transmission, you can enable TLS encryption. First, you need to generate a server certificate and a private key:

[0043] sudo openssl req -new -x509 -days 365 -nodes -out / etc / mosquitto / certs / server.crt -keyout / etc / mosquitto / certs / server.key

[0044] Then enable TLS encryption in the configuration file:

[0045] cafile / etc / mosquitto / certs / server.crt

[0046] certfile / etc / mosquitto / certs / server.crt

[0047] keyfile / etc / mosquitto / certs / server.key

[0048] require_certificate false

[0049] Log configuration: For easy monitoring and debugging, you can configure logging as follows:

[0050] log_dest syslog

[0051] log_dest stdout

[0052] log_dest topic

[0053] log_type error

[0054] log_type warning

[0055] log_type notice

[0056] log_type information

[0057] Other configurations: According to your needs, you can also configure other parameters, such as connection number limit, message size limit, etc.

[0058] 4. Restart the Mosquitto service

[0059] After the configuration is complete, you need to restart the Mosquitto service to make the configuration take effect:

[0060] sudo systemctl restart mosquitto

[0061] 5. Test the MQTT server

[0062] You can use an MQTT client tool, such as MQTTBox or the Mosquitto client, to test the connection and message transmission of the MQTT server. For example, use the Mosquitto client to subscribe to and publish messages:

[0063] mosquitto_sub -h localhost -t test / topic -u username -P password

[0064] mosquitto_pub -h localhost -t test / topic -m "Hello, MQTT!" -u username -P password

[0065] Through the above steps, the MQTT server can be successfully deployed and configured on the cloud server to realize the reception, storage, processing and forwarding of data.

[0066] S2. The local server connects to the cloud server through the network and connects to the MQTT server on the cloud.

[0067] Deploy a local server at the energy storage system site. Its core task is to be responsible for data collection, preprocessing and communication with the cloud server. To implement these functions, a dedicated data collection program needs to be developed, and the MQTT client program is used to establish a connection with the MQTT server on the cloud server for data publishing and subscribing. The following are the specific implementation steps and methods:

[0068] First, according to the specific characteristics and monitoring requirements of the energy storage system, determine the data types and parameters to be collected. These data may include key operating parameters such as battery voltage, current, temperature, SOC (State of Charge), etc. When developing the data collection program, it is necessary to interface with the hardware devices of the energy storage system to ensure that these data can be accurately and real-time read.

[0069] When writing the data collection program, an appropriate programming language and library support can be selected. For example, use the Python language with the PyMQTT library, or use the C language with the libmosquitto library to implement the functions of the MQTT client. These libraries provide rich APIs, which can easily implement operations such as connecting to the MQTT server, message publishing and subscribing.

[0070] The specific steps are as follows:

[0071] Select a programming language and library: According to the familiarity of the development team and system requirements, select an appropriate programming language. Python is widely used because of its simplicity and rich library support. PyMQTT is a pure Python implementation of the MQTT client library, which can be easily integrated into Python programs.

[0072] Write the data collection program: Use the selected programming language and library to write the data collection program. The program needs to be able to regularly read data from the sensors and other data sources of the energy storage system and perform necessary preprocessing, such as data format conversion, filtering, etc.

[0073] Implement the MQTT client function: Integrate the MQTT client function into the data collection program. Using the PyMQTT library, an MQTT client instance can be created and connected to the MQTT server on the cloud server. The following is a simple Python example showing how to create an MQTT client, connect to the server, publish and subscribe to messages:

[0074]

[0075]

[0076] Data preprocessing and publishing: In the data acquisition program, the acquired data is preprocessed, such as data cleaning, formatting, etc. Then, the processed data is published to a specified topic through the MQTT client. For example, the battery temperature data can be published to the "sensor / data" topic.

[0077] Subscribing and receiving control commands: The local server also needs to subscribe to the control command topic published by the cloud server, such as "control / command". When a control command is received, the data acquisition program needs to parse the command and perform corresponding operations, such as adjusting the charging strategy, starting or stopping battery charging and discharging, etc.

[0078] Continuous operation and monitoring: Ensure that the data acquisition program runs continuously as a background service, and regularly check the running status of the program and the network connection to ensure real-time data acquisition and transmission.

[0079] Through the above steps, a local server can be successfully deployed at the energy storage system site to achieve data acquisition, preprocessing, and communication with the cloud server. This not only improves the monitoring and management efficiency of the energy storage system but also provides solid technical support for realizing intelligent energy management.

[0080] S3. The local server publishes the collected real-time data through a topic and subscribes to the message topic to be received;

[0081] The local server deployed at the energy storage system site needs to have data publishing and data subscription functions for two-way communication with the cloud server. The data publishing function means publishing the collected real-time data to the MQTT server through a specific topic, and the data subscription function means subscribing to the topic for receiving control commands. The following are the specific implementation methods:

[0082] First, for the data publishing function, the local server needs to pack the collected real-time data, such as the voltage, current, temperature of the battery, etc., in a predetermined format and publish it to the MQTT server through a specific topic. For example, the topic format can be defined as "realtimeData / device number", where "device number" is the unique identifier of the energy storage system. In this way, when the cloud server subscribes to this topic, it can receive the real-time data from this device.

[0083] The specific implementation method of the data publishing function is as follows:

[0084] Write a data collection and publishing program: Use the Python language and the PyMQTT library to write a data collection and publishing program. The program first needs to connect to the MQTT server, then loop to collect real-time data, package the data into JSON format, and publish it to the MQTT server through a specific topic.

[0085]

[0086]

[0087] Secondly, for the data subscription function, the local server needs to subscribe to the topic for receiving control commands. For example, the topic format can be defined as "order / device number", where the "device number" is also the unique identifier of the energy storage system. When the cloud server has a control command to send to this device, it will publish a message through this topic. After the local server receives the message, it needs to parse and execute the corresponding control command.

[0088] The specific implementation method of the data subscription function is as follows:

[0089] Write a control command subscription program: Based on the data collection and publishing program, add code to subscribe to the control command topic. The program needs to subscribe to the topic "order / device number" and set a message processing callback function. When a control command is received, parse the command and execute the corresponding operation.

[0090]

[0091]

[0092] Parse and execute the control command: In the message processing callback function, parse the received control command and execute the corresponding operation according to the command content. For example, if the received command is to start charging, then execute the operation of starting charging; if the received command is to stop charging, then execute the operation of stopping charging.

[0093] Through the above steps, the local server can simultaneously have the functions of data publishing and data subscription, realizing two-way communication with the cloud server. This not only improves the monitoring and management efficiency of the energy storage system but also provides solid technical support for realizing intelligent energy management.

[0094] S4. When the client is in an active state, it establishes a connection with the cloud mqtt server. When the client is closed or in an inactive state, it disconnects from the cloud mqtt server;

[0095] To achieve data display and the issuance of control commands, it is necessary to build a client and develop a Web browser or APP interface. The main function of the client is to establish a connection with the MQTT server of the cloud server, subscribe to data topics to receive real-time data, and publish control commands to the specified topics. The following are the specific implementation methods:

[0096] First, select a suitable client development platform and tools. For the Web browser interface, front-end technologies such as HTML, CSS, and JavaScript can be used, combined with the MQTT.js library to implement the functions of the MQTT client. For the APP interface, cross-platform frameworks such as React Native and Flutter can be selected, or native development tools such as Android Studio and Xcode can be used, combined with the corresponding MQTT client libraries, such as the MQTT Service Library for Android or CocoaMQTT for iOS.

[0097] Taking the Web browser interface as an example, the specific implementation steps are as follows:

[0098] Create a front-end page: Use HTML and CSS to create a basic page structure, including elements such as charts and tables for displaying real-time data, as well as buttons or forms for sending control commands.

[0099] Introduce the MQTT.js library: Introduce the MQTT.js library in the HTML file to communicate with the MQTT server using JavaScript.

[0100] Write JavaScript code: Write an MQTT client program in JavaScript to implement the connection with the MQTT server of the cloud server, data subscription, and publishing.

[0101] The following is a simple example code:

[0102]

[0103]

[0104]

[0105] In the above example, first, a simple page is created using HTML and CSS, including Element and for sending control commands <button>Element. Then, the MQTT.js library was introduced, and an MQTT client was created using JavaScript to connect to the MQTT server on the cloud server and subscribe to the real-time data topic. When a message is received, it will be at Update the displayed data in the element. In addition, a click event listener is added to the control button, and when the button is clicked, a control command is published to the specified topic.

[0106] Through the above steps, a client can be built to achieve data display and control command issuance. This not only improves the monitoring and management efficiency of the energy storage system but also provides a convenient tool for realizing intelligent energy management.

[0107] S5. When the client retrieves data, it subscribes to relevant topics, processes and displays the real-time data after obtaining it;

[0108] S6. When the client issues a command, it publishes a message to the topic subscribed by the local server. After the local server receives the message, it further processes the message.

[0109] It should be noted that the client needs to set up data subscription and data publishing functions. Data subscription means subscribing to real-time data topics according to needs, obtaining and displaying data, and data publishing means that when issuing a control command, the command is published to the topic subscribed by the local server.

[0110] In addition, after the system is built, connection and testing are required to ensure the stability of the network connection between the local server and the cloud server. During the process, it is necessary to test whether the MQTT connection, data publishing, and subscription functions are normal, and also verify whether the real-time data display and control command issuance of the client are accurate.

[0111] Finally, in the later use, the system also needs to be optimized and maintained regularly. Specifically, according to the actual operation situation, parameters such as data acquisition frequency and MQTT message service quality (QoS) are optimized, and the system connection status is checked regularly to ensure the stability and real-time nature of data transmission. At the same time, the system software and hardware need to be updated in a timely manner to ensure the normal operation of the communication system.

[0112] To demonstrate that the introduction of the MQTT server can significantly increase the diversity of information push methods, the following are multiple specific operations and are presented as embodiments.

[0113] In a further embodiment, in the energy storage system, a real-time data push topic (sensor / data) can be set to push sensor data in real time. Specifically, sensor data such as battery temperature, voltage, and current in the energy storage system can be pushed to the monitoring center in real time through MQTT. After the monitoring center subscribes to the relevant topic, it can receive these data in real time and display them on the interface in real time to help operation and maintenance personnel understand the system status in a timely manner.

[0114] In a further embodiment, in the energy storage system, a control command issuing topic (control / command) can be set for issuing control commands. Specifically, the monitoring center can issue control commands to the energy storage system via MQTT, such as starting / stopping charging, adjusting power output, etc. The commands are sent through the control / command topic. After receiving the commands, the energy storage system performs corresponding operations and feeds back the execution results to the monitoring center through the status / update topic.

[0115] In a further embodiment, in the energy storage system, an alarm message pushing topic (alarm / alert) can be set for pushing alarm messages. Specifically, when the energy storage system detects abnormal conditions (such as overheating of the battery, abnormal voltage, etc.), it can immediately push alarm messages through the alarm / alert topic. After the monitoring center and other relevant clients subscribe to this topic, they can receive the alarms in a timely manner and take measures promptly;

[0116] It is worth emphasizing that through the filtering and routing functions of MQTT, more refined information pushing can be achieved. For example, it can be set that only when the battery temperature exceeds a certain threshold, alarm messages are pushed through the alarm / alert topic. This can reduce unnecessary information pushing and improve the efficiency of information processing.

[0117] In a further embodiment, in the energy storage system, a heterogeneous system integration topic (status / update) can be set for updating system status information. Specifically, the energy storage system may need to be integrated with multiple heterogeneous systems (such as power management systems, weather forecasting systems, etc.). Through MQTT, information exchange between different systems can be easily achieved. For example, the energy storage system can subscribe to the weather / forecast topic of the weather forecasting system to obtain weather information for the next few days and optimize the energy storage strategy.

[0118] In a further embodiment, in the energy storage system, the pushed MQTT messages can be stored on the cloud server for subsequent analysis and traceability. For example, by analyzing historical sensor data, the operation strategy of the energy storage system can be optimized. The monitoring center can query the historical data at any time for fault troubleshooting and performance analysis. The historical sensor data is stored on the cloud server, and the data analysis team regularly analyzes this data to optimize the energy storage strategy and improve system efficiency.

[0119] The above is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. < / button>

Claims

1. An implementation method of an energy storage EMS system based on MQTT two-way communication, characterized in that, It includes the following steps: S1. The cloud server establishes an MQTT server; S2. The local server connects to the cloud server through the network and connects to the cloud MQTT server; S3. The local server publishes the collected real-time data through a topic and subscribes to the message topics to be received; S4. When the client is in an active state, it establishes a connection with the cloud MQTT server. When the client is closed or in an inactive state, it disconnects from the cloud MQTT server; S5. When the client retrieves data, it subscribes to relevant topics, processes and displays the real-time data after obtaining it; S6. When the client issues a command, it publishes a message to the topic subscribed by the local server. After the local server receives the message, it further processes the message.

2. The implementation method of the energy storage EMS system based on MQTT two-way communication according to claim 1, for the cloud server to establish an MQTT server, characterized in that, Select Mosquitto as the MQTT server software to receive, store, process and forward data.

3. The implementation method of the energy storage EMS system based on MQTT two-way communication according to claim 1, wherein for the local server to connect to the cloud server through the network and connect to the cloud MQTT server, it is characterized in that Successfully deploy a local server at the energy storage system site, develop a dedicated data collection program, and use the MQTT client program to establish a connection with the MQTT server of the cloud server to publish and subscribe to data.

4. The implementation method of the energy storage EMS system based on MQTT two-way communication according to claim 1, wherein for the local server to publish the collected real-time data through a topic and subscribe to the message topic to be received, the characteristics are as follows: Define the topic format as "realtimeData / device number", where "device number" is the unique identifier of the energy storage system. When the cloud server subscribes to this topic, it receives real-time data from this device; define the topic format as "order / device number", where "device number" is also the unique identifier of the energy storage system. When the cloud server needs to issue a control command to this device, it publishes a message through this topic. After the local server receives the message, it needs to parse and execute the corresponding control command.

5. The implementation method of the energy storage EMS system based on MQTT two-way communication according to claim 1, characterized in that, Set the real-time data push topic. The battery temperature, voltage, and current data in the energy storage system are pushed to the monitoring center in real time through MQTT. After the monitoring center subscribes to the relevant topic, it receives these data in real time and displays them in real time on the interface.

6. The implementation method of the energy storage EMS system based on MQTT two-way communication according to claim 1, characterized in that, Set the control command issuance topic. The monitoring center issues control commands to the energy storage system through MQTT. The commands are sent through the control command issuance topic. After the energy storage system receives the commands, it performs corresponding operations and feeds back the execution results to the monitoring center through the control command issuance topic.

7. The implementation method of the energy storage EMS system based on MQTT two-way communication according to claim 1, characterized in that, Set the alarm information push topic. When the energy storage system detects an abnormal situation, it immediately pushes alarm information through the topic. After the monitoring center and other relevant clients subscribe to this topic, they can receive the alarm in the first time.

8. The implementation method of the energy storage EMS system based on MQTT two-way communication according to claim 7, characterized in that, Through the filtering and routing functions of MQTT, set that only when the battery temperature exceeds a certain threshold, the alarm information is pushed through the alarm / alert topic.

9. The implementation method of the energy storage EMS system based on MQTT two-way communication according to claim 1, characterized in that, Set the heterogeneous system integration topic. Through MQTT, the energy storage system can subscribe to the topic of the weather forecast system to obtain weather information for the next few days and optimize the energy storage strategy.

10. The implementation method of the energy storage EMS system based on MQTT two-way communication according to claim 1, characterized in that, Store the pushed MQTT messages on the cloud server for subsequent analysis and backtracking. The monitoring center can query historical data at any time.

Images