DL/T 2901-2025 in English

The acquisition terminal should also have the ability to monitor the status of the communication link, and be able to save the transmitted data when the communication is abnormal and continue transmission after recovery. This requirement ensures the integrity and reliability of data acquisition.

Analysis of Communication Technology Requirements

Networking Structure Selection Strategy

Article 6.4.1 of the standard specifies in detail the selection strategies for four networking structures, providing clear technical guidance for different application scenarios:

Communication protocols and interface standards

In terms of communication protocols, the standard recommends the use of commonly used power communication protocols such as Modbus, DL/T 634.5 101, DL/T 634.5 104, and DL/T 698.45—2017, which ensures compatibility with existing power systems.

Wired communication supports various methods, including PLC/HPLC, RS232/485 serial ports, RJ45 Ethernet, and fiber optic interfaces. Wireless communication supports technologies such as micropower wireless communication and trusted WLAN, providing ample technical options for different scenarios.

Security Protection System Construction

Chapter 7 of the standard establishes a comprehensive perception-layer security protection system, covering five dimensions: physical security, device security, access security, communication security, and data security.

In terms of cryptographic technology application, the standard explicitly requires the use of national secret algorithms, including the SM3 algorithm for integrity protection and the SM2, SM1/SM4 algorithms for confidentiality protection, demonstrating its high regard for information security.

IoT gateways and smart terminals, as the focus of security protection, require the use of hardware or software cryptographic modules to implement device security, communication security, and secure access authentication at the platform layer. These modules must also provide security monitoring, auditing, and analysis capabilities for connected terminals.

Implementation Recommendations and Best Practices

Planning and Design Phase

During the planning and design phase of the power IoT perception layer, it is recommended to first clarify the application scenario requirements and determine the devices and parameters to be monitored based on the list of perception objects in Appendix B. Then, based on the specific scenario characteristics, select the appropriate device type and network structure.

For locations where equipment is concentrated, such as substations, it is advisable to adopt connection relationship ① and deploy multiple smart terminals for on-site business analysis. For scenarios such as overhead lines in uninhabited areas, it is advisable to adopt connection relationship ② and implement data transfer and edge computing through IoT gateways.

Device Selection and Deployment

Device selection should focus on compliance with technical requirements, especially the integrity of security features. It is recommended to prioritize IoT gateways that support containerized deployment and smart terminals with edge computing capabilities to reserve space for subsequent functional expansion.

During deployment, attention should be paid to the installation location of the data collection terminal. For real-time monitoring services, the data collection terminal should be installed close to the perception object to ensure accurate and timely data collection.

Optimization of operation and maintenance management

Establish a complete equipment management system to achieve full life cycle management of perception layer equipment. Make full use of the device management function of the IoT gateway to regularly conduct equipment health status assessments and software version upgrades.

Strengthen security monitoring and auditing, establish an emergency response mechanism for security incidents, and ensure the effective operation of the perception layer security protection system.

Prospects for technological development trends

With the development of new technologies such as artificial intelligence and 5G, the perception layer of the power Internet of Things will develop in a more intelligent and integrated direction. In the future, innovative technological applications such as smart terminals that support AI reasoning and communication networks with self-organizing capabilities may appear.

This standard reserves technical space for the application of these new technologies, especially by supporting containerized deployment and edge computing, laying a good foundation for subsequent technology upgrades. It is recommended to pay attention to technological development trends during implementation and introduce new technologies to improve system performance in a timely manner.