Application of integrated workstation in substation remote monitoring system

¡¡¡¡With the continuous development and improvement of substation automation construction and transformation, most power grid enterprises have realized the functions of remote measurement, remote signaling, remote control and remote regulation of remote substations, namely "four remotes". At present, in order to improve labor productivity and increase economic benefits, enterprises begin to implement the unattended mode of substation (substation). The image monitoring system is a further supplement and improvement to the "four remotes", which is called "the fifth remotes" - remote viewing in the industry.

¡¡¡¡The main function of the remote viewing system is to monitor and record the safety of the substation and the operation of the equipment, monitor the heating degree of the power equipment, find and deal with the accident in time, which will help to improve the safety and reliability of the power system automation, and provide relevant image data for post accident analysis. At the same time, it also has the functions of fire prevention and anti-theft. Therefore, more and more power companies take remote viewing system as a new way of substation automation management. At the same time, optical fiber or microwave communication networks have been built in substations at all levels, which provides excellent conditions for the construction of network-based remote vision system.

¡¡¡¡Substation remote viewing system is to collect and encode the video and audio data and monitoring data of the substation by the front-end equipment of the substation, and transmit the encoded data to the monitoring center through the network. The monitoring center receives the encoded video data and monitoring data for monitoring, storage and management. The implementation of substation remote monitoring system provides a powerful information technology guarantee for realizing the unattended substation and promoting the gradual development of power grid management in the direction of automation, integration, centralization and intelligence.

¡¡¡¡Demand analysis:

¡¡¡¡The tasks of substation remote viewing system mainly include two aspects: first, from the perspective of security, ensure the safety of buildings and equipment within the space of substation, anti-theft and fire prevention. The specific functions to be realized include:

¡¡¡¡Walls, gates, etc. shall be protected from illegal intrusion through camera, microwave and infrared probes;

¡¡¡¡Install alarm probes on doors and windows of buildings, such as door magnetic, infrared and glass breaking detectors;

¡¡¡¡The installation of cameras in key parts can achieve 24-hour uninterrupted video monitoring, alarm linkage video recording, and infrared cameras can be used in some parts;

¡¡¡¡Linkage of acoustic photoelectric alarm equipment;

¡¡¡¡Linkage of fire fighting equipment;

¡¡¡¡The second main function of the remote viewing system is to ensure the normal operation of substation equipment, alarm and video recording of accidents, audio-visual communication between emergencies and the main station, etc. the specific contents are as follows:

¡¡¡¡Monitor the main transformer and other important equipment through camera and light linkage, and monitor the operation status of equipment in the site and high-voltage distribution room;

¡¡¡¡Because the overheating of power system equipment is a phenomenon that can not be ignored, it is very important to automatically monitor the temperature of important nodes and joints;

¡¡¡¡Through image monitoring, combined with the advantages of remote and local personnel operation experience to avoid misoperation;

¡¡¡¡Monitor the instrument panel of equipment in the main control room;

¡¡¡¡Video monitoring of knife switch position;

¡¡¡¡Cooperate with other systems (such as substation integrated automation system, etc.);

¡¡¡¡Two way audio and video communication with the master station for emergency handling of emergencies;

¡¡¡¡System composition with Juying electronics products as the core control:

¡¡¡¡At present, power supply companies generally have dozens of substations of different levels under their jurisdiction. Each substation has at least 2m channels to connect to the substation area or power supply company. Front end equipment such as camera, alarm input and output equipment and video server are installed in each substation. Substation remote monitoring software is installed in the monitoring server and monitoring terminal in the substation area, Monitor the substations under its jurisdiction. Establish the main monitoring server in the power supply company, install the substation remote monitoring master station software, and monitor all substations through the monitoring server in each substation area. The leaders of the company, safety supervision and production department can monitor the real-time image and temperature information of each substation at any time on their own office microcomputer, and call the video data. In this way, a hierarchical substation remote monitoring mode is formed by relying on the power network.

¡¡¡¡System functions:

¡¡¡¡The substation remote viewing system adopts remote control (jy-rtu6640) / browser structure, which meets the information system standard of power industry. It can be seamlessly connected with various types of Ethernet devices.

¡¡¡¡Using B / S (Browser / server) structure and standard TCP / IP protocol, it has strong openness and compatibility, and can be fully integrated into the existing network of power system. The system has network bandwidth control mechanism, which can make the most effective use of bandwidth resources without affecting other applications on the network on the premise of ensuring image quality.

¡¡¡¡It integrates video, audio, alarm, control, temperature and humidity monitoring and visual conference. The system has powerful functions.

¡¡¡¡Embedded technology is adopted, which has high stability and reliability, and there will be no crash, which fully meets the requirements of unattended substation.

¡¡¡¡The client is standard IE browser (the hardware adopts top-360 industrial computer), and the operation interface is all Chinese visual interface, which is very convenient for bureau leaders and personnel on duty.

¡¡¡¡The video server provides remote access function. The administrator can modify various parameters of the equipment without arriving at the equipment site to improve the equipment maintenance efficiency.

¡¡¡¡Due to the modular structure and convenient construction, there is no need for video matrix, switcher, picture splitter, character superimposer and other equipment in the traditional monitoring system, which improves the overall stability and reliability of the system.

¡¡¡¡The system adopts modular software and hardware structure. When the substation is expanded, only the substation equipment needs to be expanded, and the monitoring center does not need to add any hardware equipment.

¡¡¡¡It can be combined with conventional industrial TV monitoring center equipment, such as access video matrix, TV wall function, etc.

¡¡¡¡Provide secondary development services such as customer functions and user interface customization.

¡¡¡¡Image monitoring and sound monitoring functions of each substation; It can clearly and real-time monitor the picture of any camera on the monitoring terminal and console, control its PTZ and lens, and monitor the scene;

¡¡¡¡Lighting control function;

¡¡¡¡Security and fire alarm linkage function;

¡¡¡¡Digital backup and playback functions;

¡¡¡¡Camera position preset and patrol function;

¡¡¡¡Alarm linkage function: in case of alarm, the image on the monitoring terminal shall be able to automatically switch to the corresponding camera. The camera with preset function can also automatically switch to the preset point and automatically start digital video recording;

¡¡¡¡Temperature monitoring function: the system can be equipped with metal thermal detector or special infrared temperature measurement, infrared imager and other devices, which can automatically carry out image analysis, over temperature detection and alarm.

¡¡¡¡System management and recording functions. Including the setting of priority and use authority, multiple password protection, user operation records, and the distribution and coordination of control rights;

¡¡¡¡The system can display multiple images from different substations in real time on a monitor screen or TV wall at the same time; Multiple monitoring terminals can monitor the same or different substation images at the same time; It has the function of multi screen automatic round inspection; It also has the function of conference TV or videophone.