The paper considers four variants of inspection of overhead power transmission lines with 35 kV voltage and higher. Technical and economic indices for every inspection variant have been determined in the paper. The most rational inspection variant of the line having length up to 30 km is a scheme of line inspection by team of electricians within one day. Execution of overhead power transmission line inspection by one person being sent on an assignment trip is expedient when the line length is more than 30 km. In the case of inspection criteria equivalence (minimum cash expenditures on inspection, minimum inspection duration, maximum quality of work execution) a scheme presupposing to use a helicopter with a scanning device is considered as the most rational one.

The paper considers calculation methods for reliability of  agricultural distribution power networks while using Boolean algebra functions and analytical method. Reliability of 10 kV overhead line circuits with automatic sectionalization points and automatic standby activation has been investigated in the paper.

The paper is devoted to research of cathode surfaces with different curvature radius (r = 1–8 mm) while forming nanosecond pulsed discharge in dense air. Influence of field and air pressure heterogeneity rate in gas gap on size of micro-craters being formed on working cathode surface after pulsed effect has been shown in the paper. The paper reveals a maximum expansion of separate micro-crater size on cathode surface with small curvature radius.

The paper considers problems of rational energy use at  medical institutions inMoroccowithin the context of general energy policy and promotion of the ISO 50001:2011 “Energy management systems – Requirements with guidance for use” requirements in one of the largest hospitals of the country.

The paper considers a problem concerning existing methods for  choosing location of a step-down transformer substation (STS). Algorithms and program segments for calculation of STS location using  existing and CG methods have been developed in the paper. The paper presents results of investigations numerically and graphically and it also contains an assessment of the CG method efficiency.

The paper proposes an algorithm for online identification of active stator resistance. Algorithm synthesis has been developed on the basis of a recursive least squares method. The problem has been solved for induction motor model defined in the stationary stator frame α–β-coordinating system. An analysis of negative factors deteriorating the identifier operation has been made in the paper. The analysis has revealed the following: measured signals are noisy due to quantization and differentiation; dynamic model of an induction motor provides only approximate presentation about actual processes in the electromagnetic system of the machine. The paper presents results of  a system simulation while applying the proposed algorithm that confirm the fact that the estimated value of the active stator resistance tends to a true value with high accuracy. The identification test assumes a fixed rotor and nominal parameters uncertainty, but the flexible structure of the algorithm allows to use it as  for single-phase excitation so for full-phase control of the induction motor with freely rotating motor.

The paper presents methodology for structural and parametric optimization of cascade ACS   technological parameters of thermal power processes which has been developed on the basis of a modified Smith predictor. The given methodology permits significantly to improve quality of regulation in comparison with the typical cascade AСS.

The paper proposes methodology for analysis and calculation of laminar fluid flow processes in a boundary layer.

The presented dependences can be used for practical calculations while power carriers of various application are moving in the channels of heat and power devices.

An analysis of  an actual situation with the problem concerning estimation of product resource-ability has been made in the paper. The paper considers development of methods in respect of probability theory of extreme values and its application for estimation of resource characteristics. An approach for determination of product resource-ability which is based on material yield stress and entropy criteria of product degradation has been proposed in the paper.

Investigations concern heat utilization and reduction of hazardous emissions occurring in residential buildings and accompanying operation of a great number of industrial enterprises in particular heat and power objects, and firstly, heat-generating units of small power located in densely populated residential areas without centralized heat supply.

The investigation target is to reduce cost of heat produced by independent system of building heat supply, reduction of air pollution  due to hazardous gas emissions and reduction of heat pollution of the environment as a result of building ventilation system operation, ventilation of their internal and external sewerage network and higher reliability of their operation.

The target is achieved because the device with complex system for heat utilization and reduction of hazardous air emissions has additionally an assembly tank for mixing flue gases, ventilation emissions and atmospheric air, heat pump. Evaporation zone of the pump is a condensator of the gas mixture and its condensate zone contains a heat supply line for a heat consumer. The line is equipped with assembling  and distributing collectors, pipeline connecting the heat supply line with the system of direct and return delivery water from a boiler house, a separator for division of liquid and gaseous mixture phases, neutralizing devices for separate reduction of concentrations of hazardous and odorous substances being released in gaseous and liquid portions of the mixture, a pipeline for periodic supply of air with higher concentration of hazardous and odorous substances in the boiler furnace. The supplied air is obtained as a result of its passing through gas filters at their regeneration when their exchange capacity is exhausted.

Taking integrated power system of theRepublicofBelarusas an example the paper considers a possibility of heat accumulator use for TPP operation in accordance with the schedule of electric power consumption while maintaining daily supply of heat energy from turbine power takes-off and without involvement of peak-loader boilers used for covering energy loads.