Background and challenges
As the core link of the power grid, the substation is responsible for the high and low voltage conversion and power supply tasks in the area. Safe operation is particularly important. During the "Thirteenth Five-Year Plan" period, the intelligent substation will enter a stable construction period. The comprehensive auxiliary system will be used as a support system to ensure the operation of the substation. With the implementation of the standard, comprehensive supporting construction will be made to make the intelligent substation stride towards a comprehensive perception era.
The main problems faced by the comprehensive auxiliary system at this stage:
l Difficult to unify protocols-whether it is video surveillance or environmental monitoring, although the State Grid has defined interface standards, many of them still use private protocols in the access process, increasing management costs when the system is networked;
l Less business integration-"remote viewing" mostly only implements the functions of video review and history tracing. The video monitoring system is still independent of the production system and is not really integrated into the daily management of the substation;
l Many human interventions—The abnormal situation of video monitoring points needs to be actively discovered by humans. The linkage mechanism between multiple systems has been gradually established, but most of them are limited to switching linkage instead of protocol linkage;
l Difficult operation and maintenance-After the system is connected to the network, in the face of a large number of video surveillance equipment, the operation and maintenance workload is huge and the detection is difficult, which often results in unsuccessful troubleshooting and makes the use of the video surveillance system greatly reduced.
The intelligent substation integrated auxiliary system solution is mainly applied to the construction and transformation of the intelligent substation integrated auxiliary system of the provincial companies of the power grid company.
At the substation station, the substation intelligent auxiliary monitoring platform manages all the auxiliary systems on the station side, and sends the video information and environmental information to the central master station through the State Grid B interface and the 104 protocol, and performs information through the DL / T860 and information integration platform Interaction.
The system architecture diagram is as follows:
The station-side system is mainly composed of a substation intelligent auxiliary monitoring platform, video monitoring system, dynamic ring monitoring system, network equipment, and station-side client, etc., to realize the functions of collecting, processing, and monitoring on-site video and audio and various environmental information; The station-side system takes the substation intelligent auxiliary monitoring platform as the core, and realizes functions such as information aggregation and station-side planning.
The system topology is as follows:
The intelligent auxiliary substation comprehensive auxiliary system adopts high-definition, intelligent, Internet of things, and infrared thermal imaging application technologies. Under the guidance of the "standardized, integrated, intelligent" design principles, the industry products using standard communication interfaces have achieved the following functions:
l High-definition video surveillance-Full access to 720P and above HD cameras to improve video quality and security level, meet the needs of detailed monitoring (equipment status, meter readings, facial features) and support HD video storage;
l Intelligent analysis and recognition-equipment status analysis, behavior analysis, license plate recognition;
l Infrared online temperature measurement-Infrared thermal imaging is used to measure the temperature of important equipment on a 24-hour basis. Once the temperature is found to exceed the limit, an alarm can be issued in time;
l Auxiliary system integration-to achieve the integration of video surveillance, environmental monitoring, security guards, fire alarms, intelligent control, access control and other subsystems, and each subsystem is linked according to the plan;
l Visual operation management-The main station video inspection plan can be configured as required, and it can communicate with the station-side information integration platform. When a trip operation or trip accident occurs, the platform sends a "remote signal" signal to the substation intelligent auxiliary monitoring Platform, associated with corresponding camera presets;
l Three-dimensional supervision mode: Two-level vertical supervision at the station end and the main station is realized. The control center and the main control room use C / S to access, and the relevant management departments use B / S to access.
l System operation and maintenance management-IT infrastructure management, video quality diagnosis, bandwidth optimization and control, asset management, log management.
1) Access and integrate the auxiliary subsystems inside the station, realize the comprehensive monitoring of the auxiliary subsystems, and realize the intelligent preplans inside and outside the system;
2) Supporting the integration with the information integration platform through the DL / T860 protocol, uploading the panoramic data of the auxiliary system and receiving the control signaling issued, achieving business integration with the production system;
3) When the substation is switched off, the video preset position can be linked, and the visual operation management is truly realized.