5G can play an important role in all aspects of the power system

The characteristics of 5G are highly matched with the performance of the smart grid. For the power industry, 5G can promote the optimization and adjustment of the load characteristics of the power system and greatly improve the operating efficiency of the system. For example, 5G + smart grid can not only greatly reduce the average power outage time of users, but also effectively improve the reliability of power supply and management efficiency. At the same time, it can greatly enrich and expand the application scenarios of the power grid, reduce costs and increase efficiency, and help the power grid transform into an integrated energy service provider.

Specifically, 5G can bring more flexible and economical, more secure, reliable and low-latency deterministic network communication services to the new power system. All aspects of emergency communication play an important role.

1. In the power generation link, the low latency and large connection characteristics of the 5G network can realize real-time interaction of module data such as power plant distributed energy storage regulation capability assessment, power generation forecast, and station operation analysis. In addition, power plant equipment sensors and high-definition camera video data can be transmitted to cloud platforms or local edge computing platforms through 5G large bandwidth capabilities, enabling applications such as unmanned inspections in plant areas and machine vision video security.

2. In the power transmission link, the use of the large bandwidth and high reliability of the 5G network can realize the refined and large-scale inspection of UAVs in overhead transmission lines. Using the low-latency characteristics of 5G networks, it is possible to accurately control the underground transmission line corridor tunnel robots in real time, and realize grounding circulation monitoring.

3. In the substation link, by connecting video surveillance cameras, environmental sensors and other equipment to the 5G network, real-time monitoring of equipment such as transformers and switch cabinets in the station can be realized, and equipment faults can be found and eliminated in time.

4. In the power distribution link, the 5G network can effectively meet the needs of wide distribution of distribution terminals, many collection points, and high security requirements. Using the high reliability and low latency characteristics of the 5G network, it can realize the differential protection and automation of the distribution network. , precise load control, distribution station equipment and comprehensive monitoring of production safety and other applications to ensure the safety of power distribution operations.

5. In the power consumption link, the use of 5G network can realize high-frequency collection and monitoring of power quality of important customers, solve the cost problem of power operation monitoring, and help realize large-scale deployment of high-frequency monitoring of power quality; at the same time, through 5G network, charging piles and Data exchange between management platforms to promote optimized electricity consumption.

Main application scenarios

At present, the application of 5G in the power industry includes four major business scenarios: control business, acquisition business, mobile application business, and multi-station integration business.

In the control business, 5G can optimize energy allocation, avoid large-scale power outages that affect enterprises and residents, and at the same time meet the online monitoring of real-time dynamic data of the distribution network; in the collection business, 5G can promote the collection and provision of the original power consumption of the entire system Information; in mobile services, 5G can prevent safety accidents and environmental pollution, reduce the workload of manual inspections, and try live operations in the future; in multi-station integration services, 5G technology will promote the construction of platform-based and shared enterprises.

Precise load control

Precise load control technology means that when multiple DCs are fed into the power grid with multiple DC continuous commutation failures and faults resulting in DC blockage, a substantial shortage of active power in the receiving end grid, and a sharp drop in frequency, the distributed massive power can be precisely controlled according to the magnitude of the DC power loss. The user can interrupt the load, realize the friendly interaction between the power grid and the power supply and the load, achieve the instantaneous balance of power supply and demand, support the optimal configuration of energy resources, avoid the occurrence of large-scale power outages, minimize the loss of the power grid, and reduce the power consumption of enterprises and residents. impact is minimized.

The less the delay of the entire group of the precise load control system, the faster the recovery of power grid faults. Therefore, the lower the delay to the communication, the better. Among the requirements for communication, emphasis is placed on delay, availability, security, and reliability. The precise load control system based on 5G communication network is constructed by business terminal, demand response terminal, communication network and master station system. Among them, the service terminal is connected to the building response terminal through the local network, and the demand response terminal is connected to the main station of the demand response system through the 5G communication network.

Distribution network differential protection service

As a power grid technology that is maturely applied in high-voltage transmission network, the differential protection technology of distribution network can solve many problems caused by the access of distributed power to the distribution network. The principle is that the power distribution differential protection terminal compares the current value (vector) of two or more terminals at the same time. When the current difference exceeds the set value, it is judged that a fault has occurred, and the circuit breaker or switch is disconnected to perform the differential protection action. Thereby, the precise location and isolation of distribution network faults are realized.

The 5G+ distribution network differential protection monitors the real-time current values ​​of the nodes at both ends of the distribution line through 5G industrial-grade timing CPE and 5G+ distribution network differential protection terminals, and performs interactive comparison to determine whether the connection line is faulty. Once a fault is found, quickly locate and cut off the faulty line, complete fault isolation, and avoid chain reactions. At the same time, the backup line can be started in real time, and fault recovery can be realized through line switching.

Intelligent inspection and safety monitoring of transmission lines

The traditional inspection of power transmission lines is a manual method, which requires specially equipped electric personnel to regularly inspect the line and equipment operation on site. However, the traditional inspection method is that some construction sites are dangerous and difficult to inspect, such as high-voltage transmission lines in the field. Periodic inspection of physical characteristics is required. Generally, the length of the line between two towers is 200 to 500 meters, and the inspection range is several kilometers long. Second, there are problems such as low efficiency and uncertainty in manual operation. Therefore, manual inspection is gradually replaced by intelligent inspection methods such as drones and robots.

The current intelligent inspection equipment is connected to the 5G network through the embedded 5G module or 5G CPE and other gateway equipment, and the inspection site data collected by the cameras and sensors on the equipment is transmitted back to the edge cloud platform in real time through the 5G network, and the edge cloud The platform's image recognition, deep learning and other intelligent technologies and algorithm processing can comprehensively judge the inspection results, replace manual on-site inspections, and realize unmanned and intelligent inspections.

Multi-site integration service

The multi-station integration business makes full use of the substations, new energy stations, energy storage stations, electric vehicle charging stations, power supply business offices, pumped storage power stations and other site environments to build data center stations of different levels and application scenarios. The data center station provides local storage and edge computing capabilities for substation data. Network edge computing is an extension of cloud computing. By migrating the cloud computing platform and its capabilities to the network edge such as substations and new energy stations, it has the ability to support high bandwidth and low time. It provides stronger support functions for extension and localization business, and provides resource sharing services to the society.

Multi-station integration is to explore the use of substation resources to build and operate data center stations, 5G base stations, Beidou ground enhancement stations, charging piles, energy storage stations, etc. Promote power companies to build a sharing platform to better create value for the society.