Virtual reality technology 2000-word paper Part I: On the unified monitoring platform of electric power based on virtual reality technology.

With the increasing number of unattended substations, it brings new technical and management challenges to the power management department. The automation and intelligence of unattended substations are getting higher and higher, and there are more and more on-line monitoring systems, and the requirements for information management are getting higher and higher. Therefore, there is an urgent need for a unified monitoring platform to display electrical equipment, environment, images and various alarm devices in an all-round way, so that management operators can quickly, intuitively and conveniently check the required real-time or historical data. Aiming at the new challenges of unattended substation operation and management, this project improves the operation and management level of unattended substation through the application research of substation remote unified intelligent monitoring platform based on virtual reality (VR) technology.

Keywords virtual reality power intelligent monitoring platform

1 Introduction

With the rapid development of power automation technology, more and more conventional substations are transformed into unattended substations, and the voltage level and range of unattended substations are becoming wider and wider, which has become an inevitable trend in the future. After the conventional substation is transformed into unattended substation, the automation and accuracy of substation operation are realized, the efficiency and accuracy of substation accident handling are ensured, the system safety is further guaranteed, the misoperation of personnel is reduced, a large number of operators on duty are reduced, the labor productivity is improved, the cost is reduced, and the scientific and technological progress of enterprises is promoted.

However, the unattended mode brings new challenges to the original mode in technology and management. The voltage level of unattended substation varies from station to station, and the equipment model is complex, which requires managers and operators to be familiar with the operation, maintenance and operation of the equipment. Moreover, the automation and intelligence of unattended substations are getting higher and higher, there are more and more online monitoring systems, and the requirements for information management are getting higher and higher. Therefore, it is urgent to unify, integrate and analyze different monitoring systems according to the real scene of equipment, so that electrical equipment, environment, images and various alarm devices can be displayed intuitively in all directions, so that management operators can quickly, intuitively and conveniently check the required real-time or historical data.

2 Project content

This project aims at the new challenges of the operation and management of the above-mentioned unattended substation, and through the remote unified intelligent monitoring platform of the substation based on virtual reality (VR) technology (hereinafter referred to as? Platform? ) improve the operation and management level of unattended substation, as shown in figure 1.

2. 1 Functions of the platform

2. 1. 1 Real 3D Reconstruction of Substation Scene

Visualize the building, main control room, switch room and environment scene of substation; Visually display the actual connection between the electrical primary part and the electrical part; Visually display the position and appearance of the switch cabinet; Visually display the site installation position of auxiliary control equipment.

2. 1.2 Centralized display of equipment working conditions

Immerse yourself in the three-dimensional real scene, quickly and conveniently view the relevant data, values and images of any electrical equipment, and make corresponding analysis and judgment on the historical trend.

Integration with Scada system-real-time display of Scada telemetry and telecommunication data of electrical equipment, statistics of switch tripping times, transformer shifting times and gas protection action times;

Integration with image monitoring system ―― Real-time display of on-site monitoring images;

Integration with on-line temperature measurement system ―― Real-time display of on-line temperature;

Integration with on-site inspection system ―― Display the inspection history of equipment.

2. 1.3 view real-time images automatically and flexibly

Double-click the equipment in the scene, and the imaging equipment will automatically turn to focus, subverting a series of tedious actions such as manually finding the camera, rotating the pan/tilt and focusing. Without looking for imaging equipment, we can quickly, conveniently and accurately carry out a series of actions such as remote appearance inspection, photographing, thermal infrared imaging temperature measurement, thermal infrared photographing and so on, and intelligently generate humanized records and reports.

2. 1.4 equipment abnormal alarm

In the whole three-dimensional scene, each device model will intelligently judge whether the device works normally with the data collected in real time; If there is any abnormality, the 3D scene will automatically render the equipment into the alarm mode and locate it, constantly prompting the operator to troubleshoot in time; After disarming the alarm, you can view the historical alarm records in the equipment data panel.

2. 1.5 Long-range patrol

Set necessary inspection information, such as the equipment points to be inspected, the amount of data involved, the appearance of video images, thermal infrared imaging, etc. , the system automatically generates the inspection path; Patrol inspectors randomly or regularly conduct remote patrol through the platform, and when they enter the set patrol equipment point, the system will display the relevant online monitoring data of the equipment in a centralized way; Patrol judges whether the results of real-time patrol and the change trend in the past short time are normal, and forms a record of remote comprehensive analysis patrol results, as shown in Figure 2.

2.2 Characteristics of Remote Unified Intelligent Monitoring Platform for Substation Based on Virtual Reality Technology

2.2. 1 intuitive and realistic.

Virtual reality is an environment where people can visualize, operate and interact with complex data in real time through computers. In this platform, the scene of the substation in the northern suburb of Anyang will be faithfully reproduced through the three-dimensional model, creating an immersive interactive environment.

2.2.2 Unified management

The substation remote unified intelligent monitoring platform based on virtual reality (VR) technology can integrate various platform systems and display their corresponding data or images, such as Scada electrical data (remote communication and telemetry data), online temperature measurement data, video images of auxiliary monitoring systems, etc.

Intelligent monitoring

The remote unified intelligent monitoring platform of substation based on virtual reality (VR) technology integrates digital video monitoring, RFID wireless identification, intelligent access control, intelligent alarm and other monitoring means.

In the whole three-dimensional scene, each device model can intelligently judge whether the working state of the device is normal or not by virtue of the data collected in real time. If there is any abnormality, the 3D scene will automatically render the equipment into the alarm mode and locate it, constantly prompting the operator to troubleshoot in time;

All images, security, fire protection, perimeter, access control, temperature and humidity, various sensing devices, three-dimensional primary electrical equipment and its accessories, various attributes, data, actions and changing rules can be used as alarm conditions for alarm and combined alarm triggering.

Intelligent remote inspection

Optimize the current traditional on-site inspection mode. By setting different inspection contents such as inspection route, inspection equipment, inspection data volume and equipment appearance on the platform, inspection personnel can conduct remote inspection on the platform regularly or randomly. When entering the inspection equipment point, the system will centrally display the online monitoring data of relevant equipment, and check whether the results of real-time inspection and the change trend in the past short time are normal. A comprehensive analysis result record can be formed, which can conduct multi-system and cross-platform inspection of electrical equipment remotely and efficiently, reduce the frequency of on-site inspection and form a high degree of complementarity and unity with on-site inspection.

3. 1 3D modeling technology realized by 3.3 technology

3D modeling software is 3dMax, which is a 3D animation rendering and production software based on PC system developed by Autodesk Company. It has powerful functions and good expansibility. Suitable for making building models, object animation models, character animation models, etc. And you can achieve realistic effects by using the system's own material library or self-made maps.

3DMax can also export model files to various formats for loading on the engine platform of Java3D development, such as obj files, 3ds files, mdl files, smd files and so on.

The models suitable for this platform engine are obj, 3ds and ms3d. The static model of the basic scene adopts obj file format; The animation of circuit breaker opening and closing and door opening and closing adopts 3ds format; The roaming character animation adopts ms3d format.

3.2 Platform Engine Technology

Because the platform adopts B/S architecture, the platform engine chooses Java3D to realize VR technology. Java 3D is an extension of Java language in the field of three-dimensional graphics, and it is a set of application programming interfaces (API). The client only needs to use the standard Java virtual machine to browse, and does not need to install plug-ins. Moreover, Java3D is an Internet-based software development platform, which can well integrate graphics functions with the Internet, and is very suitable for developing a network-based VR system.

The platform algorithm has the following innovations:

(1) Innovative use of dual vision mode, showing the human/eye vision mode in the complex scene of substation; It can reproduce the complex real scene of substation more intuitively and immersive, and realize the multi-angle stereoscopic display of complex scenes such as substation, electrical equipment and cabinet.

(2) Aiming at the complexity of 3D substation scene terrain, the traditional 2D heuristic search A* algorithm is improved, which greatly improves the time-consuming of automatic wiring of complex 3D substation scene.

(3) The detection algorithm of ground height in the complex scene of 3D substation is improved, and multi-dimensional ray detection information of road height is innovatively added, which improves the detection accuracy.

(4) According to the complexity of substation scene, the layout of electrical equipment and the space limitation, the traditional AABB collision detection algorithm is improved, and the dynamic AABB collision detection algorithm is adopted, which greatly improves the accuracy of collision detection.

(5) In the three-dimensional complex scene of substation, people's movement is smooth, and the traditional BSP tree is abandoned. Ellipsoid algorithm and sliding formula are adopted to realize the smooth movement of people after collision and the ellipsoid sliding treatment after collision in power inspection.

3.3 System Interface Technology

The platform and other system interface programs to be displayed adopt Web service mode. It is a distributed modular component based on network, which performs specific tasks and abides by specific technical specifications, which enables Web services to interoperate with other compatible components. Web services further extend these models in communication by using SOAP (Simple Object Access Protocol) and XML (Extensible Markup Language Extensible Markup Language) to remove the obstacles of special object models. XML is a markup language, which is used to tag electronic files and make them structured. It provides a unified method for describing and exchanging structured data independent of applications or vendors. It can be used to mark data and define data types. It is a source language, allowing users to define their own markup language, which is very suitable for Web transmission.

One of the main functions of the platform is to display the real-time parameters of different systems. Different systems have different programming methods, and like Scada system, it has a large amount of data and high real-time requirements, so it is necessary to design interface programs flexibly, efficiently and with good expansibility.

Interface with Scada system: Scada system contains all telemetry and telecommunication data of all power equipment, so it is difficult for this platform to retrieve the required data quickly and conveniently from such a huge amount of data.

Interface with auxiliary control system of substation: The platform needs to retrieve real-time images and intelligent alarm signals from auxiliary control system quickly and conveniently, and the image files are generally large, so it is difficult to display them quickly and smoothly in 3D platform.

Reserved interfaces with other systems: Because this platform can integrate data from other system platforms, it requires sufficient redundant design in expansibility.

4 conclusion

The 3D system of unified monitoring platform based on virtual reality (VR) technology adopts advanced software and hardware technology. Based on the actual situation of intelligent management and safe operation of substation, many problems that are difficult to be solved manually in traditional management are solved. At the same time, it is oriented to the whole module of substation, which overcomes the disadvantages of data fragmentation and manual association in the past. From the point of view of practical use of substation, such as actual command, operation diagnosis and maintenance operation, accurate and timely data acquisition of substation operation equipment is realized, and the real location scene and real-time status of electrical equipment and various monitoring devices are reproduced intuitively, stereoscopically and realistically, and the roaming, data recording, appearance recording, patrol analysis report entry and other data of substation stereoscopic patrol are reproduced intuitively and uniformly. Standardize business process management, reduce human and material losses, realize automatic generation and analysis of information data, and realize intelligent and centralized management of substation operation.

refer to

[1] Chen Zhuo, et al. Research on simulation patrol function of substation training based on virtual reality [J]. Modern Computer (second half), 20 10(09).

Zhang, et al. Application of Virtual Reality Technology in Substation Simulation [J]. Computer Simulation, 2008,25 (2).

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