Smart Grid Security Video Surveillance System Technology Trends

With the constant development of China's power industry, higher requirements have been put on the operation of various types of major equipment in power transmission and transformation enterprises and the operation of personnel. Power transmission and distribution enterprises have adopted remote management and remote communications through modern management methods and methods. , telemetry, telemetry to remote viewing, continuously improve the level of production automation. Through substation security and video surveillance systems, it is possible to remotely inspect the operation conditions of various types of equipment and the operating conditions of personnel, obtain real-time alarm information, and recall accidents through video recording.

In recent years, the development of smart grid has gradually become the mainstream of the development of China's power system industry. Smart substations are an important part of the smart grid. The intelligent substation is an advanced, reliable, integrated, low-carbon, and environmentally-friendly intelligent device. It takes the digitization of the entire station information, the networking of the communication platform, and the standardization of information sharing as the basic requirements. It automatically completes information collection, measurement, control, protection, and measurement. Basic functions such as monitoring, and can support substations with advanced functions such as real-time automatic control of the power grid, intelligent adjustment, on-line analysis and decision-making, and cooperative interaction. The networking, digitization and automation of intelligent substation management are inevitable trends in the development of electric power. Unattended, integrated management and safety management of substations are the only way for grid modernization.

Security video surveillance technology has been applied very early in the power industry. The main reason is that substations in transmission grids are geographically dispersed and spread over hundreds or even thousands of square kilometers. Network video monitoring is urgently needed. The use of power 2M dedicated communication lines can be more convenient for video surveillance networking, early substation network video surveillance system can also be called: substation remote image monitoring system (television system). After several years of development, the substation remote vision system is not limited to network video surveillance applications. It integrates substation perimeter prevention, environmental monitoring, lighting control, access control, and fire protection linkage applications. In accordance with the development trend of smart substations, Substation auxiliary systems continue to evolve.

Nanjing Nanzi Information Technology Co., Ltd. has independently designed and developed substation remote vision systems, substation video and environmental monitoring systems, and smart substation integrated auxiliary monitoring systems. It has complete independent intellectual property rights and is widely used in nearly 10,000 substations in domestic power grids (750KV, 500KV, 220KV, 110KV, 66KV, 35KV voltage levels have application cases).

Traditional Substation Security and Video Surveillance System The traditional substation security and video surveillance system is mainly implemented with the construction of a safety and security system based on analog video surveillance to achieve remote monitoring of power running equipment and substation environment. At the same time can be integrated perimeter protection, intrusion detection, environmental monitoring (ambient temperature and humidity, smoke alarm, flood alarm), alarm linkage and many other functions.

Smart Substation Auxiliary System In recent years, with the application of the IEC 61850 standard and the development and use of photoelectric transformers, research and pilot projects for the smart grid in China have started and become an important component of the grid. The concept of digital intelligent substation has been applied in engineering practice. A certain number of digital intelligent substations have been built in the country.

The digital intelligent substation makes all the information acquisition, transmission, processing and output of the substations converted from past analog information to digital information, and establishes a corresponding communication network and system. The structure of the digital intelligent substation automation system can be physically divided into two categories, namely, intelligent primary equipment and networked secondary equipment; in the logical structure can be divided into three levels, according to the definition of the IEC communication protocol, these three The levels are called "process level", "spacing level", and "station control level." The new digital intelligent substation is mainly composed of signal acquisition systems for digital and optical fiber, digital relay protection and integrated automation systems, digital video and environmental monitoring (smart aid) systems.

As we all know, China's power companies are mainly composed of five major power generation groups and two major power grid companies, of which the two major power grid companies are the State Grid Corporation of China and China Southern Power Grid Corporation. The research and application of the intelligent substation auxiliary system has achieved a certain scale of promotion and practice in the State Grid Corporation of China and China Southern Power Grid Corporation. In the national grid, it is mainly promoted by the integrated monitoring platform of the intelligent substation auxiliary system. In China Southern Power Grid, it is mainly promoted by substation video and environmental monitoring systems.

Smart Substation Auxiliary System Integrated Monitoring Platform Smart Substation Integrated Auxiliary Monitoring Platform is mainly applied in the national grid. It usually consists of seven subsystems, namely, video monitoring subsystem, environmental monitoring subsystem, intelligent control subsystem, security guard subsystem, and door ban. System, fire control subsystem, four remote linkage subsystems.

Video Surveillance Subsystem The video surveillance subsystem is composed of various cameras, video processing units (DVR/DVS/NVR/video storage servers), three-in-one lightning protection devices, etc.; the video monitoring subsystem passes the station-side processing unit and simulates video. The audio, and data information are compressed into network data packets, which are stored in the local storage unit and can be uploaded to the superior master station via the integrated data network through the integrated management of the integrated monitoring platform. In addition, the intelligent analysis function can analyze the situation in the key areas of the substation in real time, track and record abnormal conditions, and quickly notify relevant personnel in the event of an emergency.

Power environment monitoring subsystem The power environment monitoring subsystem consists of access equipment, temperature and humidity sensors, SF6 detectors, wind speed sensors, flood detectors, air conditioning controllers, communication power interfaces, fan controllers, and pump controllers.

The intelligent control subsystem intelligent control subsystem is composed of the control unit and auxiliary equipment. The intelligent control system is the centralized intelligent control of the auxiliary facilities in the station, including lighting, ventilation, drainage, air conditioning and other equipment control. The control of each equipment includes Local control and software control, and can achieve linkage control based on related systems, such as alarms and environmental monitoring system information, such as when the room temperature and humidity conditions exceed the normal temperature and humidity range of the room, through the control room air conditioning, fan, so that The room temperature and humidity are in a state suitable for stable and efficient operation of electrical equipment to ensure stable operation of indoor electrical equipment.

Security Guard Subsystem The Security Guard Subsystem is composed of an infrared radiation alarm, an infrared double alarm, an electronic fence, and a key alarm. The security guard system is an advantageous supplement to the video surveillance subsystem and can perform the actions of the invading substation. To a good deterrence and prompting effect.

The access control subsystem access control subsystem consists of an access control host, a card reader, a door opening button, an electromagnetic force lock, etc. The access control subsystem can effectively prevent out-of-town personnel and unrelated personnel from entering and leaving the substation, and each time the card is swiped and recorded. , available for viewing at any time.

Fire-fighting subsystem The fire-fighting subsystem communicates with the fire-fighting system host by the access equipment.

The four remote linkage sub-systems of the four remote linkage subsystems realize the video linkage based on remote control operations, accidental trips, and other events.

Smart Substation Video and Environmental Monitoring System The smart substation video and environmental monitoring system is mainly applied in the South China Power Grid. With the Guangdong Power Grid as the lead, the “Guangdong Power Grid Substation Video and Environmental Monitoring System Technical Specifications” has been formulated. This technical specification provides system interconnection and communication protocols. The audio and video codec algorithm and the streaming media transmission format are all in detail. The operability is strong and they can realize the real interconnection between different manufacturers' devices.

Grid Security Video Surveillance Integrated Management Platform The Grid Security Video Surveillance Integrated Management Platform provides networked management of multiple substation security and video surveillance systems distributed in a given area, supporting substations -> centralized control stations -> county-level platforms -> municipal levels Platform->Provincial platform multi-level network management.

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