I. Industry status and needs
Substation is the core link of power transmission and a typical high-risk work scenario. Due to the strong structuring and high similarity of substations, the slightest carelessness can easily lead to the occurrence of safety accidents. Relying on the construction of ubiquitous power Internet of Things, it can realize the digitalization, letter intelligence and visualization management of the operation and management of intelligent substations. The current problems of substations in safety management are as follows:
Pain point 1: In the process of maintenance some areas are still in normal operation, for maintenance personnel, there may be the phenomenon of going to the wrong area, the lack of supervision and warning of dangerous areas. Traditional overhaul supervision adopts the method of people watching people, when the relevant personnel are negligent or do not comply with the code of practice is prone to dangerous events, not only to increase manpower investment, there is also a potential safety hazard.
Pain point 2: outdoor work at height, 110kV and above main transformer casing work, the safety protection rope of the operator is tied to the safety level protection rope, and the work positioning rope is tied to the main transformer casing. The safety belt has no high hanging firm point, low hanging high with easy to fall danger, can not provide timely rescue; up and down the transformer and transformer on the transposition of no protection, casing body oil pollution easily caused by the operator slipped and fell, work near the dangerous energized equipment can not be timely reminder.
Pain point 3: In the major safety accidents of the power grid at home and abroad, malignant mishandling accidents of hanging grounding wire with electricity or sending electricity with ground wire still occur. Although the current microcomputer "five prevention" devices are forced to operate in accordance with the program by locking the grounding piles in the transformer substation to avoid misinstallation and omission of the grounding wire, they can not solve the problem of the safety of temporary grounding wire removal in the transformer substation, which makes the existing error prevention system have safety loopholes. However, it cannot solve the safety problem of temporary grounding wire removal in the substation, and it is impossible to monitor and determine in real time whether the grounding wire has been hooked up, hooked up in what position, and whether it is unloaded after the completion of the operation, which makes the existing error-proofing system have safety loopholes, and the act of closing the circuit breaker with the grounding wire can't be detected and stopped in time.
In view of the pain points and difficulties of the current situation of the electric power substation industry, Hainan Shidian Technology has launched a precise personnel positioning management system based on UWB technology, which can provide substation management and maintenance personnel with precise location service information, time information, trajectory information, etc., and send out alarms through the setting of the electronic fence to discover abnormal behavior in time, realize the joint action of automated supervisory facilities, and improve the response speed of emergencies and events It forms a three-dimensional preventive pattern of human defense, technical defense, physical defense and joint defense.
II. Overall programmatic structure
The system includes UWB tag, UWB explosion-proof base station, positioning engine software (C/S architecture) and positioning application system. Positioning tags and positioning base station communicate through UWB pulse signals, positioning base station transmits the received positioning tag data to LS1000 positioning engine for data analysis and processing through 5G network and wired Ethernet, and transmits the processed accurate position to upper layer application through open API interface.
The system components are as follows:
UWB tags: card-type and wristband-type, fixed on top of the person or object to be located, can periodically transmit UWB signals with tag ID information.
UWB outdoor wired base station: communicates with the positioning tags and transmits information back to the positioning engine algorithm software;
Positioning engine algorithm software: locally deployed, the underlying information data is collected and processed through the algorithm of the positioning engine to get the accurate coordinates of the positioning tag.
Positioning application software: locally deployed or cloud deployed, the application layer software realizes the basic functions such as positioning display, track playback and other functions, as well as the business functions such as electronic fence, intelligent inspection, attendance statistics and video linkage based on the expansion of location data.
III. System hardware
IV. Programmatic functions
|
function point |
Functional Description |
|
Real-time positioning of personnel |
Personnel positioning accuracy of 0.3-1 meters, realizing real-time positioning management for substation maintenance personnel, view the real-time location of the positioned personnel, distribution areas and other information, to grasp the personnel dynamics at any time and any place. |
|
Historical track search |
Visualized traceability of overhaul operations, by playing back historical trajectories and organically combining spatio-temporal information with operational content and video images. |
|
roll call |
You can obtain information about the activities of the people who are in the area by specifying the area. |
|
Fall detection for elevated work |
Substation work at height and work at height to check whether the operating conditions meet the operating requirements, the work below the electronic fence prohibits non-operating personnel to walk or stay, around the nearby air with or without power lines, power equipment, should always maintain a sufficient safety distance from the electrically powered equipment, part of the situation needs to be disconnected in advance before the operation. In case of slip and fall during operation at height, the fall alarm will be prompted to the control center, and the operator can also press the sos alarm button to call for help.
|
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Call for help at the touch of a button |
The card has a built-in SOS button, long press 3S system platform sound and light alarm. |
|
electric fence |
According to the overhaul task, set the virtual operation fence to supervise the operation range and operation time of the overhaul personnel. Correlate the tasks of maintenance personnel with time and space, set the alarm fence for the area of charged operation during maintenance, once there are non-authorized personnel intruding into the monitoring platform and the label worn by the personnel to link up to generate alarm information. |
|
Inspection Management |
Draw circular, polygonal, and rectangular fenced areas, configure basic information about the inspection area, inspection schedule, and create reports through drawing tools. |
|
Regional staffing statistics |
Real-time counting of the number of people in each area, e.g. switch room, GIS room, main substation room, control room, outdoor, etc. |
|
asset location |
Monitor fixed assets by setting up asset location tags. |
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Alarm record information management |
For different types of alarm information, the icon visualization display is used. |
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Statistical Queries |
Displays the statistical number of alarms and provides yearly, monthly and same-day query and printing of alarm statistical information. |
|
Location information heat map |
Statistically analyze the positioning data of the distribution of people and vehicles on a particular positioning map, and statistically analyze and draw a heat display map. |
|
position tracking |
Queries a snapshot of the distribution of a person's location information at a given moment in time. |
|
Visitor Management System |
Registers incoming personnel, makes additions, modifications and deletions, and issues and receives cards for incoming personnel. |
|
video link |
Combining the UWB positioning system with the substation video monitoring system, once a warning occurs in a certain area, such as strangers appearing at entrances and exits, personnel entering the area without authority, personnel approaching the source of danger, and personnel asking for help, etc., the system will immediately pop up the on-site monitoring screen and take photographs to record the on-site situation, which will provide a basis for efficient decision-making. |
|
Hardware working status management |
Query and locate the working status information of base stations, beacons and other hardware, and display the map location information where the equipment is located, which is convenient for subsequent maintenance and overhaul. |
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Positioning system addresses support multiple formats |
Tilt photography, Hummingbird Cloud Maps, Goldmap, 3D modeling, 2D maps. |
V. Site photographs
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