Currently, the energy efficiency improving into the oil production is an important task. The main electricity consumer in the electrical complex structure of the electric centrifugal pumps’ installation is a submersible asynchronous electric motor. The power factor of these electric motors varies from 0.75 to 0.85. It leads to the losses’ increasing in the conductive elements of the complex. The use of downhole reactive power compensators is the most potential way to increase the power factor into the submersible asynchronous electric motors. In the course of pilot tests there are some cases of the protection devices for downhole compensators’ false triggering. It is recorded when the control station is switched off. It leads to the energy efficiency decreasing into the oil production. The purpose of this study is to research the transients in a submerged asynchronous electric motor equipped by the downhole compensator when the power supply is switched off. The task of the study is to determine the transient process’ parameters, in order to prevent false triggering of the downhole compensator protection devices. Simulation modeling of a submerged electric motor with a downhole compensator is performed in the Matlab Simulink. A simulation model of a submerged electric motor with a downhole compensator is developed to study transients when the power supply is switched off. The characteristics for the transient process of the voltage and current into the downhole compensator are obtained during the simulation modeling. The current surge for the capacitors’ discharge of the downhole compensator is 260.7% relative to the rated current at the time of the power supply disconnection. Prevention measures off false triggering for automatic shutdown devices of the downhole compensator are proposed.
In the context of the specifics of tourism discourse and communication through blogs, the paper presents an analysis of the image of the cultural heritage of the municipality of Kazanlak in 30 publications in French-language tourist blogs from the last ten years. The various discursive strategies and linguistic tools that can be identified in these texts are explored through the prism of their contribution to structuring a presentation that goes beyond the story of personal travel and emphasizes authenticity, identity and axiological charge, aesthetic value and the invitation to discover alterity in the described tangible and intangible cultural heritage. Elements that bring the discourse thus constructed closer to a communication that valorises cultural property. Thus, beyond the possibility of outlining the image of cultural heritage perceived by the foreign tourist, useful with a view to the efforts to promote it, the issue of the foreign tourist blog as a potential interesting component of communication campaigns in the field of cultural tourism deserves attention.
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