Applications of Internet of Things Technology in Smart Grids and Energy Networks

Applications of Internet of Things Technology in Smart Grids and Energy Networks

The Internet of Things (IoT) plays a very important role in the development of every link of smart grids and energy networks, as well as in various types of power equipment. In the following areas, IoT will help advance the intelligent transformation of smart grids and energy networks.

(1) Power Generation and Energy Storage

The smart power generation segment can generally be divided into three major components: conventional energy, renewable energy, and energy storage technologies. The application of IoT technology can improve the level of condition monitoring for conventional generating units, enable rapid regulation and deep peak shaving, and effectively promote the informatization, automation, and interactivity of power sources, thereby supporting coordinated development between generation and the grid.

By integrating IoT technology, it is possible to develop intelligent reservoir dispatching systems that combine real-time monitoring, trend forecasting, online scheduling, and risk analysis, thereby improving hydropower utilization efficiency. Based on IoT technology, research can also be carried out on renewable generation such as wind and photovoltaic power, as well as their grid integration technologies, to enable harmonious development between renewables and the power grid. IoT can also support research on charging/discharging management and dispatch systems for electric vehicles. In addition, IoT technology helps advance key research on sodium-sulfur batteries, flow batteries, and lithium-ion batteries in areas such as modular grouping, intelligent charging and discharging, and system integration.

(2) Power Transmission

Power transmission is an extremely important part of the smart grid. Although much related work has already been carried out, many problems still remain. The main issues include a still-weak grid structure, equipment capability and health levels that need further improvement, relatively outdated equipment maintenance methods, and the fact that systematic equipment condition assessment is still at an early stage.

Grid technological upgrades can be combined with IoT technology to improve the sensing capabilities of primary equipment and to work effectively with secondary equipment, enabling functions such as joint processing, data transmission, and comprehensive analysis, thereby enhancing the technical level and intelligence of the power grid. Transmission line condition monitoring is an important application in the transmission segment, mainly including lightning location and warning, meteorological environment monitoring and warning for transmission lines, icing monitoring and warning, online monitoring and warning of wind-induced conductor swing, image and video surveillance of transmission lines, fault location and nature identification of transmission line operating faults, insulator contamination monitoring and warning, and online monitoring and warning of tower inclination. All of these areas require support from IoT technologies, including sensing, analytics, and communications.

(3) Substations

In the substation segment, research has already been carried out on condition-based maintenance, full life-cycle asset management, and integrated substation management. However, equipment capability and health levels still cannot fully meet the requirements for building a strong grid and advancing automation. Substation automation technology is not yet mature, while smart substation technologies and their operation and management systems remain incomplete. Equipment maintenance methods are still relatively outdated, and systematic equipment condition assessment is only just beginning.

With IoT technology, the status of critical equipment can be uploaded through sensors to a management center, enabling real-time monitoring and early warning of equipment conditions, as well as advance planning for replacement, maintenance, and fault prediction. In recent years, with the continuous progress of digital technologies and the wider adoption of the IEC 61850 standard in China, the level of integrated substation automation has steadily increased. Applying IoT technology to digital substation construction can improve environmental monitoring, equipment asset management, equipment inspection, and security protection.

(4) Power Distribution

IoT applications in distribution networks mainly include the perception and monitoring of environmental status information, mechanical status information, and operational status information of key distribution equipment; security warning for distribution equipment; fault diagnosis and assessment; and equipment location and maintenance.

At present, maintenance methods for distribution network equipment in China are still generally outdated, making it necessary to adopt advanced IoT technologies to achieve breakthroughs. For example, in field operation management for distribution networks, IoT applications mainly include identity recognition, electronic tags, electronic work tickets, environmental information monitoring, and remote supervision. An IoT-based field operation management system for distribution networks can truly enable real-time interaction between the dispatch and command center and on-site personnel.

(5) Power Consumption

The smart power consumption segment is an important carrier through which users perceive and experience the smart grid. With the development of smart grids, the interaction between the grid and users is becoming increasingly two-way, while requirements for power supply reliability and electricity use efficiency continue to rise. At the same time, distributed generation, microgrids, and electric vehicle charging and discharging systems are being connected to the grid.

Therefore, it is urgently necessary to study the key supporting IoT technologies that can adapt to these developments, so as to meet expanding electricity demand and changing consumption patterns. IoT technology has broad application prospects in smart power consumption, mainly including smart meters and advanced metering, smart sockets, intelligent power interaction and smart electricity services, management of electric vehicles and charging stations, green data centers, energy efficiency monitoring, and demand-side power management.

(6) IoT-Based Power Asset Management

At present, asset management in power enterprises is still largely extensive in nature, and this rough management approach brings many problems, such as a disconnect between asset value management and physical asset management, short equipment life spans, rapid replacement cycles, large investments in technological upgrades, and high maintenance costs.

With the construction of smart grids, the number of generation, transmission, transformation, distribution, and consumption-related devices has increased rapidly, while operating conditions have become more complex, making intensive and refined full life-cycle asset management more difficult to implement. IoT technology can automatically identify target objects and acquire data, providing technical support for achieving full life-cycle management of power assets, improving operational efficiency, and enhancing management standards.

(7) Intelligent Power Equipment

Intelligent power equipment can comprehensively provide various types of system status information in digital form, and also possesses self-diagnostic and adaptive control capabilities. IoT can help realize the intelligence of power equipment in the following aspects:

1) Information Perception

IoT technology can effectively enable the distributed sensing, transmission, and processing of electrical and non-electrical monitoring signals, thereby making non-contact current measurement possible.

2) Intelligent Diagnosis

Condition monitoring and fault diagnosis of power equipment are important means of improving equipment reliability and ensuring safe system operation. IoT technology can support intelligent diagnosis in signal acquisition, signal transmission, and signal processing.

3) Intelligent Operation

Research into the optimal motion characteristics of switching devices under different operating conditions, along with digital implementation methods and technologies, constitutes intelligent operation of power equipment. IoT technology can enable functions such as real-time status acquisition and decision-making for operating modes during intelligent operation.

4) Information Interaction Networks

Information interaction networks are the basic link and bond of the smart grid. IoT wireless networking technologies can be applied in environments where power equipment is densely deployed. By using wireless communication technologies to simplify system architecture, networks can be flexibly and automatically reconfigured as needed, thereby improving the safety and reliability of power supply and distribution systems.