The investigation of the influence of on-load tap-changing device on the algorithm of identification of winding short circuits in multi-winding power transformers was conducted.
The theoretical research and experimental verification of the surface plasmon resonance prism based sensors element have been carried out. This research includes the simulation of optical characteristics, optimization of geometric parameters and the production and research of an experimental low cost prototype with simple construction. The influence of the thickness change of the silver and chromium layers on the position of the reflectance minimum, which corresponds to the surface plasmon resonance, has been investigated.
The estimation of sensitivity of Archangelsk seismic network seismic station on the base of registered during four years world earthquakes is given. The spatial distribution of sensitivity at registrations of earthquakes in different range distances and azimuth are revealed, information about technical parameters of registrations for seismic stations are precise.
The well-known problem of parametric sensitivity of a field oriented controlled induction motor drive is considered. The analytical method is offered for parametric sensitivity investigation. Using the results obtained with this method and results obtained by the mathematical models, conclusions are drawn and recommendations for the parametric sensitivity reduction are made. The effective method for the identification of IM parameters at a standstill is proposed.