Abstract
Affected by electric field generated in power transmission line, live worker on the high-voltage transmission line is in dangerous working environment. In this paper, posture perception, numerical simulation, and risk assessment are adopted to realize the deep fusion of physical trajectory and spatial virtual electric field distribution of live worker, and digital twin bodies of live worker in different live working scenarios are constructed. Firstly, posture trajectories and 3D model of living worker in typical operation conditions are captured and reconstructed by full-body inertial action capture technology and this technology use motion capture unit which include 3-aixs accelerometer/gyroscope/magnetic field sensors. The length of complex gap and body workspace under various live work scenes are also calculated. By static electrical field finite element (FE) numerical modeling, surface electrical field distributions of live worker under different posture trajectories are then calculated. Finally, interactive mechanism between “body-information-physical environment-virtual environment” is introduced, and potential risk of live worker is on-line assessed by live work guide rules. This work develops a new assessment and protection method for virtual training and field operations of high-voltage live worker. Which is of great significance for enhancing operation level and ensuring living workers’ safety.
Highlights
In the process of living working on power transmission lines, workers will be affected by high-voltage lines and electric fields on the surface of the human body is induced when they enter the charged space of high-voltage power transmission line
This paper focus on virtual training and safety assessment of live worker who work in high-voltage power transmission line
It can be seen from the results that when a live worker wearing a shielding suit enters a high-voltage space electric field, an induced electric field is generated on the surface of the body and causes the space electric field distortion, what’s more, electric field concentration occurs in the hands and feet of the body
Summary
In the process of living working on power transmission lines, workers will be affected by high-voltage lines and electric fields on the surface of the human body is induced when they enter the charged space of high-voltage power transmission line. A gap discharge model for living working on UHV lines is established in [7], the electric field distribution on human body surface under different voltage levels, positions, and human postures are obtained by the finite element method. J. Guo et al.: Study on Construction and Application of Digital Twins shown in [13]; A safety monitoring method of live working on high-voltage line by time-of-flight (ToF) depth imaging technology is raised in [14]. The current VR training considers the modeling including physical features such as electric fields, the on-line monitoring methods and systems are all based on the actual physical model of live worker. This paper focus on virtual training and safety assessment of live worker who work in high-voltage power transmission line. Research results will help improve the operation level of live worker in complex working scenes and ensure live workers’ safety
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