Abstract
At a substation, the condition of an applied voltage is checked using a bulky contact-type electroscope. Although it is important to secure a safe working environment, it is a burden to workers. In addition, in an emergency investigation or at the time of an accident, an operator may erroneously recognize a power interruption and cause an electric shock. Therefore, it is desirable to develop technology that can easily distinguish the charged condition from a distance. In this research, the focus was on the slight vibration of the conductor owing to the Coulomb force generated when a high voltage was applied. A system for visualizing the charging state by detecting the vibration with radar and combining it with a stereo camera was developed. Its performance was then confirmed at an experimental site and substation. In addition, the effectiveness of a method that used independent component analysis to identify the harmonics of the power supply frequency and vibration resulting from the applied voltage was demonstrated.
Highlights
At workplaces that handle high voltage, such as substations, work should be carried out after confirming that the electric circuit is in a power outage state to avoid electric shock accidents
We focused on the fact that when a high voltage was applied to a conductor, a slight vibration is generated by the Coulomb force [1]
This evaluation board is equipped with a two-channel transmission integrated circuit (IC) ADF5901, a four-channel reception IC ADF5904, and a modulation/demodulation IC ADF4159, each of which can be controlled by serial peripheral interface (SPI) communication
Summary
At workplaces that handle high voltage (several to several tens of kilovolts), such as substations, work should be carried out after confirming that the electric circuit is in a power outage state to avoid electric shock accidents. We proposed a method to determine the power applied status by separating and identifying two parallel wires in the beam [2]. We proposed a method to narrow the beamwidth to detect only one electric wire, and identify the intended wire by the distance estimation result combining the frequency modulation continuous wave (FMCW) and a stereo camera [3] [4]. Using these technologies, we developed a system that visualizes the applied power state of conductors and evaluated its performance under various conditions [5]. We will present the operating principle of the system, the outline of the prototype device, and the performance evaluation experiment
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