Keyword: «cryolithozone»

The results of long-term monitoring of microbiological activity of disturbed lands after an oil spill that occurred on the territory of the Southwestern part of Yakutia are presented. It has been established that after the introduction of biological preparations based on the native hydrocarbon-oxidizing microflora in soils, both with fresh and old oil pollution, the microbiological activity of soils intensifies. The activation period of hydrocarbon-oxidizing activity of soil microorganisms in the cryolithozone was about 7 years for fresh oil pollution and 3 years for soils with old oil pollution. Therefore, the method of activation of biological destruction of oil pollution with the use of native hydrocarbon-oxidizing microorganisms is not relevant for permafrost soils with long-term oil pollution. It is necessary to develop new ways to restore disturbed lands with long-term oil pollution.

The article discusses laboratory tests of heating electrodes in order to determine the interaction of the structural elements of the grounding system and the grounding system as a whole for quantitative and qualitative indicators to improve the efficiency of electric power systems in a cold climate.

In the article the influence of cold climate and the causes of failures and emergency modes of operation in the electric power system operating in the territory of the Republic of Sakha (Yakutia) are considered. Reliability and durability of power facilities, including overhead power transmission lines in the conditions of the North, directly depends on taking into account the engineering-geological, climatic and geocryological conditions of the area of their construction. Thus, in the regions of the Far North, under the influence of complex engineering-geological, climatic and geocryological conditions, there are regular disruptions in the operation of existing power transmission lines, which negatively affects the reliability of power supply, especially in winter.

The task of microgrid is uninterrupted power supply and ensuring an energy balance between the consumed and generated capacities. The peculiarities of the operation of renewable energy systems is the dependence of electricity production on external factors: wind speed and direction, daylight duration, water regime of rivers, etc. The non-stationary mode of operation of generating equipment affects the reliability of power supply and the quality of electrical energy. To eliminate the influence of unsteadiness of electricity production, electric energy storage devices based on rechargeable batteries are used to maintain a balance of capacities in an isolated system during periods of generation shortage. Combining various sources into a single system makes it possible to ensure its stability in various operating modes.