1.1 System Overview
Distribution network is electric network’s closest link to end users among its power generation, transformation, transmission and distribution and so on. It is also an important link in smart grid construction and will be the focus of smart grid construction in the future.
However, sub-station, sub-section post and other core nodes of distribution are frequent places to have problems such as fire, theft, water logging, which bring much disturb to the stable operation of the distribution system. On the other hand, though the operations and repair include the management process such as the systems of working ticket, operation ticket, repair list, the distribution network’s link information will flow smoothly. This poses challenges to the distribution network maintenance.
Thus, the need for visualization assisted monitoring platform aimed at distribution network was born.
Great’s visualization assisted monitoring platform for distribution network is developed and designed to solve all kinds of difficulties in the operation of distribution network, which makes it possible for the distribution system to be comprehensive, visible, intelligent and networked.
It realized not only the integrated integration of fire prevention, security, water proof, video integrated information of sub-stations and sub-section posts, but also the visualized panoramic presentation of comprehensive information, the intelligently interworking of accident scenes, the disaster prevention initiative analysis and so on, achieving the goals of making production operation visible, prevention and repair closed loop.
1.2 System Construction
The system is made up of the front end of sub-station and the management platform.
A figure is designed according to the supplementary control, and the host is exchanged to be an embedded one.
1.3 Front-end System
The front end system of the sub-station is made up of the core host device and the auxiliary control subsystem.
The subsystem mainly includes environment monitoring system, wireless temperature measuring system, firework monitoring system, magnetic door monitoring system, invasive monitoring system, water soaking monitoring system and video monitoring system.
Environment monitoring: monitoring the temperature, humidity and other environment indexes inside and outside the power distribution equipment room.
Wireless temperature measurement: meters are attached on the surface of the power distribution equipment to monitor the actual temperature of the monitoring device.
Fire monitoring: monitoring the existence of fire in the power distribution room by smoke and flame sensor.
Entrance guard monitoring: monitoring the open or close status of the power distribution room by the magnetic door sensor.
Invasion monitoring: monitoring the entering of illegal or suspicious personnel by the infrared double guide or infrared correlation devices.
Water soaking monitoring: monitoring rain, water leakage and other problems by the device which can be installed near the devices and cables, and can be linked with pumps to pump water and drain flooded fields.
Video monitoring: collecting, browsing and recording the audio and video message in the power distribution room, and presetting cradle head fast turning point in some critical positions.
1.4 System Platform
Online real-time monitoring：
Integrating environment, fire, magnetic door, invasion, water soaking and other subsystems to deliver real-time information’s comprehensive presentation, complete alarming and integrated query.
Using GIS electric map and sub-station’s project map as monitoring scene for remote communication, remote measuring, remote control, remote adjustment and remote viewing.
Comprehensive linkage management：
Establishing logical linkage rules in any subsystem and between subsystems so that the system automatically action according to predetermined rules when alarm occurs. Hidden danger will be eliminated in time to minimize disaster losses.
Supporting the system of alarming events’ subscription and pushing through the combination modes of sound, light, valve, video, e-mail and so on to push them to all platform clients.
Intelligent unmanned inspection：
Adopting comprehensive means of video to realize the equipment’s regular inspection, special inspection, security inspection, plan inspection and so on, as well as recording the inspection results to form reports on the whole course.
Assisting to realize all trace inspection through the combination with Great handset inspection system.
Historical data query：
Recording the environment, video, artificial operation process, examination and repair process, sub-system linkage system, key frame and so on through the whole course by all trace inspection. Environment security and protection data will be permanently superimposed into the live video with subtitle.
Querying historical journals according to the alarm types and alarm nature.
Analyzing data tendency and data cross information in the form of curve, and exporting historical data, journal records as rich reports for printing and analysis as the secondary usage.
System maintenance self-inspection：
Regularly examining the operating state of function models, examining the subsystem peripherals, CPU load, memory load and other key values and recording journals on exceeding data journals.
Informing the operation staff with messages, phones, and e-mails when there is something wrong with the self-inspection system.
Here part of the main interface will be applied so as to be distinct from the auxiliary control interface.
1.5 Program features
Realized the operation management idea of power distribution system’s being integrated, visual, intelligent, and networked.
1.6 System advantages
Conforming to the idea of big operation and big repair, supporting the operation system of device, and realizing the loop closing and all traces operation and repair.
Can be linked with the power distribution automation system and protect the video linkage’s starting when device and switch are acting.
Video inspection plan can be combined with Great’s artificial all traces inspection to promote the action efficiency of operating and repairing.
Built based on the auxiliary control monitoring platform of intelligent transformer substation with advanced platform and reliable system.
System stability is extremely high and the device adapts to industrial harsh environment.
The data safety is enhanced, the platform end’s redundancy is backed up, key historical data of the front end are integrated into the video record to avoid malicious tampering
Adapting to power distribution stations and sub-section posts scene of all kinds of sizes with the modular of building blocks’ structure deployment and option type configuration method.
Can realize remote monitoring, remote configuration, remote diagnosis, remote upgrade, and remote maintenance.
Routing transmit function is set inside and video is isolated from the real-time data passage to guarantee the real-time transmission of data.
The client interface shows the changes synchronously in real time when the device state changes; alarm information is pushed synchronously platform client end and operation staff’s handheld inspection terminal when alarm occurs.