The construction and development of the power industry is an important support for national economic development, and as an important part of the power system, the safe and efficient operation of the smart grid is related to the stability and security of the entire power system and even people's livelihood. In order to speed up the development of the national economy and meet people's demand for electricity and power reliability requirements, the country proposed power grid reform as early as the 12th Plan. At this stage, the country is increasing its efforts to support the intelligent construction of the power grid.
Some time ago, the introduction of the development outline of the Guangdong-Hong Kong-Macao Greater Bay Area caused a great stir, of which smart grid construction is an important part. It is reported that from 2018 to 2022, investment in the power grid in the Pearl River Delta region will exceed 170 billion yuan, and the planning and construction of smart grids in the Guangdong-Hong Kong-Macao Greater Bay Area will be accelerated. The goal is to basically build a safe, reliable, green and efficient smart grid by 2022. Of course, not only the Guangdong-Hong Kong-Macao Greater Bay Area, but other provinces and municipalities are also stepping up the construction of smart grids to provide basic support for regional economic development.
Since the electric power industry has extremely strict requirements for production safety and stability, security equipment and systems were introduced early. However, the early security systems used in the electric power industry were mainly based on video surveillance applications, mainly protecting power plants, substations and other places, preventing electric power Facilities were stolen and vandalized. Currently, with the gradual implementation of the smart grid concept, the power industry has put forward some new requirements for the application of security technology.
First, strengthen the front-end collection function
In the early stages, the security systems used in the power industry focused on preventing theft and damage of power equipment, but ignored the operating conditions of power equipment, site temperature, fault alarms, remote control switches and other power environments or alarm information. collection. The related front-end collection equipment deployed in many substations cannot meet the needs of power operations in terms of function and quality. Many substations even now need to arrange for dedicated personnel to read meters regularly.
Most substations are in complex environments such as lightning strikes, corona, noise, and electromagnetic field interference. They have high requirements for monitoring facilities. Front-end surveillance cameras must have anti-explosion characteristics to increase their adaptability in constant temperature and humidity environments. At the same time, the front-end sensors that collect analog quantities such as temperature, humidity, current, voltage, instruments, etc. need to have high sensitivity, and different intervals can be set according to actual applications. In addition, some alarm signal collection equipment needs to be installed at the front end to collect relevant data and proactively identify and analyze whether leakage and short circuits occur in power transmission and transformation lines, whether important equipment is flooded, whether fires or thefts occur in computer rooms and warehouses, etc. It also provides active early warning to ensure the normal and safe operation of power equipment and the safety of personnel under constant environmental changes and long working hours.
Secondly, access the mobile video device
Due to the high hazards and safety risks of electric power workplaces, the access of inspection robots, unmanned helicopter intelligent inspection systems for transmission lines, and mobile video equipment such as vehicle-mounted and individual soldiers can replace manual "duty" to meet the needs of anytime and anywhere. Security requirements for monitoring and inspections inside and outside the substation.
Especially in power tunnels where there is stagnant water, dark light, insufficient ventilation, or even toxic and harmful gases, inspection robots will play an important application value and can replace personnel for routine inspections to ensure the normal operation of equipment in power tunnels and prevent Illegal acts such as theft and private wiring.
In addition, the robot fully utilizes its skills of "sensing, seeing and smelling" through intelligent technology. For example, it can accurately sense the temperature of power equipment through an infrared thermal imager, and can sense the temperature and humidity in the air, smoke, etc. through various sensors. Concentrations of specific gases (CO, O2, CH4, H2S...), etc., and the visible light camera monitors the scene in the tunnel to see the instrument readings, and when suspicious situations are found, it will automatically judge and alarm, and even call a fire-extinguishing robot to put out the fire by itself. .
The electric power industry is a basic industry. Sufficient and reliable electric power supply is the foundation for national economic and social development. Establishing a sound and effective electric power safety emergency mechanism to correctly, effectively and quickly handle and respond to electric power emergencies is of great significance to safeguarding the safety of people's lives and property. Very important meaning. Electric power emergency repair scenarios are complex and changeable. Ensuring fast, stable, and reliable acquisition and transmission of on-site high-definition video is an effective guarantee for the smooth progress of power emergency repair work. In the AI+5G Internet of Things+ era, cutting-edge technologies such as artificial intelligence and big data technology are developing rapidly, changing people's way of life, production and work.
The development of the electric power industry is closely related to the entire society. In the safe production of power supply enterprises, multiple construction units, supervision units, etc. are often involved. The personnel are complex, the environment is complex, and management is intensive. In order to prevent on-site safety accidents, electric power construction sites Security monitoring is very necessary. Remote video surveillance is currently at the forefront of technological development, from analog to high-definition, from narrowband to broadband, from wired to wireless, and from the ground to the air. In this process, the use of the latest mobile video surveillance technology can further ensure the safety of power production in the power system. The comprehensive safety management and control platform for electric power work sites mainly uses mobile networks, combined with wireless network transmission and streaming media technology, so that video surveillance technology can better serve safe power supply. With the application and popularization of 4G networks, the network bandwidth of mobile communication systems has been greatly improved, effectively solving the problems of scattered video monitoring points and difficulty in laying cables. Video images of monitoring points can be viewed online anytime and anywhere, thus realizing Job site monitoring.
5G/4G smart helmets , smart helmets , helmet cameras, video helmets, helmet cameras, law enforcement recorders , work recorders, their audio and video communication functions can transmit on-site operation status in real time through 5G/4G/WiFi networks; The command center can also supervise multiple key areas at the same time to gain an overall grasp of the actual on-site operations and provide a basis for issuing next instructions. If technical difficulties or improper operations occur at the work site, the command center can provide remote guidance and supervision. Archive the video footage that caused problems or used more scientific operating techniques to provide a better factual basis for subsequent on-site work summary, which is more convincing and publicity effect.
2. Design principles
1. Private network dedicated, information security
Establish an independent comprehensive safety management and control platform for power operation sites, dedicated to private networks;
2. Technological advancement
The technology used in various equipment is mature. Stable products with advanced design concepts. After the system is built, it can maintain its advanced nature through smooth upgrades and extend the life cycle;
3. High reliability
The system must have a high degree of reliability, and the system equipment must be able to work reliably and stably. Adopt mature, stable and universal technologies and products. The selected products have passed various quality certifications and have been proven to be stable and reliable in practical applications at home and abroad; use system software with backup and guarantee capabilities to ensure long-term stable operation of the system. , and has strong fault tolerance and recovery capabilities to ensure stable and reliable system operation; backup, redundancy and other measures are adopted for key parts.
4. High security
The solution takes corresponding measures from various aspects such as host, data and network, and considers security protection from illegal access, virus infection, lightning protection, overload, power outage, electromagnetic interference and man-made destruction.
5. High availability
Focusing on practicality, we always put the actual needs of the project first in the process of project design and implementation. We should comprehensively consider factors such as environmental conditions, monitoring objects, investment scale, and maintenance, select practical equipment, and rationally set system functions to make the system operation convenient, simple, and efficient. At the same time, optimized process design is adopted to ensure high efficiency of the system.
6. Ease of maintenance
The system hardware can easily realize remote management and maintenance, and provides a friendly human-machine interface to ensure the easy maintenance of the system.
7. Flexible scalability
The system can fully guarantee the smooth expansion of the system as the number of users increases. The software system architecture makes full use of the strong scalability of the network and adopts a decentralized control and centralized management structure, making the system extremely scalable. The network thickening is flexible, which can realize centralized processing of the platform and provide comprehensive decentralization capabilities through the network, adapting to various application environments and occasions.
8. Good openness
The system adopts the industry's mainstream hardware platform, operating system platform, database platform and standard protocols to ensure the openness of the system.
9. High cost performance
In order to meet the actual needs and quality requirements of users, we provide users with the most optimized and cost-effective solutions.
10. Normative
System development must be carried out in strict compliance with national software engineering specifications, and relevant development documents must be provided in a timely manner according to the development progress.
3. Overall platform design
3.1. Design ideas
The comprehensive safety management and control platform for power job sites (hereinafter referred to as the "Platform") is mainly used to monitor the behavior of on-site workers and achieve the following functions: first, video viewing, realizing video transmission and voice dialogue, post-event tracing, and personnel behavior analysis at the job site; second, It is a real-time monitoring system that can realize real-time video transmission and voice dialogue in emergency repairs, high-risk operations, large-scale comprehensive operations, etc., and carry out remote auxiliary research and judgment and emergency command.
The platform is positioned as a service and supervision of electric power production, and its monitoring scope covers majors such as transportation, inspection and distribution, substation, transmission and infrastructure operations.
3.2. Technical route
To monitor the behavior of personnel at the work site, real-time video monitoring is combined with on-site video post-review, and grassroots innovative methods are encouraged to supplement simulations. To sum up, there are three specific ways:
Method 1: Real-time video, network communication. Each unit is equipped with front-end equipment with 4G wireless real-time transmission function, which is mainly used for planned maintenance, natural disasters, emergency repairs or complex scenes at the work site, such as emergency repair command, transmission line tower construction, substation construction, etc. Real-time video data is transmitted to a wireless video server for remote viewing.
Method 2: Video on the spot and review afterwards. Deploy and establish a video file management server at the company level and develop platform management software. Realize the docking and pairing of work orders with relevant application information systems before operation, video recording of the on-site operation process during operation, and uploading and archiving of on-site monitoring videos after operation. Supervisors can review and analyze historical videos of on-site operations through management software.
Method 3: Substation video surveillance. In the future, the platform will retain interfaces to communicate with the existing substation auxiliary comprehensive monitoring system, and save the video of on-site operations in the substation locally for real-time operation behavior viewing and subsequent review. Based on the weekly operation plan information of each unit, the supervisors set the video probe in the station to the area to be worked in advance to realize the implementation display of on-site operation behavior and facilitate the observation of the behavior of the staff during the operation at any time.
Again, intelligent video analysis applications
As we all know in the industry, intelligent video analysis functions such as face recognition, motion detection, restricted area detection, etc. are no longer new words in the security industry. They have been increasingly used in safe cities, finance and other fields. However, intelligent video analysis functions have become increasingly popular in the security industry. The application in smart grid is still in its preliminary stage, but in the future, intelligent video analysis will be more combined with the needs of power scenarios. It has natural adaptability to power sites and can even flex its muscles.
According to the person in charge of a security solution company in the power industry, face recognition technology is embedded in the comprehensive monitoring system of the substation, and the faces in the video stream are captured through the intelligent analysis server, and the recognition comparison is performed based on the pre-established face database. Reciprocally, once an unrelated person or illegal person is discovered, an alarm will be issued immediately.
Another person in the industry said that a smart meter reading and knife gate status analysis system should be built in the substation, using video intelligent analysis technology to directly read the dial temperature of the substation and analyze the opening and closing status of the knife gate through video, so that video analysis technology can provide intelligent monitoring for the substation. New application methods added.
According to the "General Management Regulations for Substation Operation and Maintenance of State Grid Corporation of China (Trial)", substations should actively use intelligent inspection robots to carry out inspections, and complement each other with the inspections of operation and maintenance personnel to establish a collaborative inspection mechanism. At the 110 kV substation in Yangmei Mining District, Shanxi, the "Five-Self" intelligent inspection robot has been successfully on duty for half a month, and has become a "sharp tool" to protect the safe operation of the power grid in the Yangmei Group's mining area and ensure the safety of the group's mines.
According to reports, the "Five-Self" intelligent inspection robot is a robot with the functions of "automatic forward movement, automatic photography, automatic recognition, automatic storage, and automatic alarm". After being put into service at the 110 kV substation in the mining area, the "Five Self" intelligent inspection robot makes full use of its own visible light sensors, infrared thermal imaging sensors, etc. to achieve visual inspection, infrared temperature measurement, meter identification, remote control, intelligent analysis , tool The application of comprehensive functions such as gate and switch status discrimination and autonomous charging, while effectively exerting its own movement and rotation functions, realizes no blind spots in the equipment area.
5G smart grid allows power workers to monitor transmission lines and distribution facilities through ultra-high-definition cameras, detect faults in time, and save 80% of inspection manpower. Moreover, it takes a long time to identify and locate power system faults in traditional power grids, and the scope of power outages will be larger, and the time to restore power supply often exceeds one day. But now 5G technology can quickly locate the fault location, and the power outage time has been shortened to a few seconds or even less.
The person in charge of State Grid Qingdao Power Supply Company said that in the future, further research will be conducted on 5G power robots, drone intelligent inspections, and precise load control to improve power grid interoperability.
Relevant personnel said that after the intelligent inspection robot was put on duty, it not only reduced the inspection tasks of substation operation and maintenance personnel, but also improved the inspection efficiency. Through the combination of manual inspection and robot inspection, the accuracy and timeliness of finding equipment defects and faults can be effectively improved, providing a strong guarantee for the safe operation of the mining power grid.
Finally, the systems are integrated and linked
Security systems in the electric power industry include many intelligent equipment and systems such as video surveillance, environmental monitoring, fire protection, intelligent control, security perimeter, access control management and intelligent inspection. The back-end coding and processing equipment must integrate and uniformly manage subsystem information such as video data, environmental data, power data, and alarm data, and realize linkage alarms between data to establish a comprehensive system for realizing substation equipment safety, personnel safety, and environmental safety. A comprehensive three-dimensional security management and control system can ensure the safe, stable and reliable operation of the entire smart grid system. This is also the current requirement for the application of security technology in power plants and substations.
At the same time, the integration of security monitoring systems and smart grid automation management systems is also an innovation and development direction for the deepening application of security technology in large enterprises. The integration of the two can promote the informatization, automation and interaction of the power grid, provide a variety of auxiliary means for power grid reduction and efficiency improvement, make power grid operation and maintenance more stable and protection safer, thereby ensuring the development of the national economy and social progress for the safe use of electricity. Strong demand.
Summarize:
With the country strongly supporting the trend of smart grid construction, according to demand, security companies will have a large number of high-end products such as large-scale networked monitoring platforms, high-definition cameras, intelligent video analysis, and robots with advanced AI, Internet of Things, and big data technologies as the core. Space to display. There is no doubt that security systems led by monitoring are becoming the vanguard of power grid intelligence. In the future, they will be more involved in power safety production management and contribute to improving the operation and management efficiency of smart substations and power supply security.