The development of an intelligent energy storage management system is an up-to-date scientific and technical challenge. This system should ensure maximum efficiency of energy storage in power networks for various purposes. The article discusses the use of energy storage in distribution networks of an industrial enterprise and substantiation of the vector control method of the inverted synchronous motor of the energy storage SPENE-1, shows a block diagram of the vector system for controlling the energy accumulator motor and the results of its simulation in MatLab.

The article considers the method of forming a statistical Bayesian classifier in relation to the problems of operational diagnostics and rapid evaluation of the technical condition of transformer equipment. It is proposed to use the classifier as a regular means to improve the reliability of defect recognition in power oil-filled transformers based on the analysis of dissolved gases in oil. A stochastic approach to the formation of the classifier in a conditions linearly realized dichotomy of technical status classes is developed. As a distinguishing feature, a nonlinear function of the primary parameters of state is used. This simultaneously achieves both a reduction in the dimension of the feature space and an improvement in the characteristics of the random distribution. The proposed approach allows to form a decisive rule that minimizes the total error of decision-making regardless of the impact on the object of random operational factors. The results of the study of stochastic properties of the distributions of the distinguishing feature for each of the selected classes of states are obtained. The algorithm to perform statistical calculations and procedures for recognizing the current state of the transformer using the generated decision rule is designed. The results of the study illustrate the possibility of practical application of the developed approach in the real exploitation of power transformers.

Utilization of fruit seeds plays a special role, since they are a valuable raw material for the oil and fat industry, at the enterprises of which the complex processing of seeds is carried out: oil is obtained from kernels, crumbs and powder are obtained from shells. Before placing the seeds in the oil and fat enterprises, they must be cleaned of impurities and dried, since the seeds extracted from the fruits have an increased humidity of 25-60% and contain a significant amount of impurities in the form of pulp and squeezes. However, due to the lack of specialized equipment for drying fruit seeds in canneries, their supply to the kernel oil plants is declining every year. In this case, tons of seeds are simply destroyed. Attempts to use existing industrial dryers proved to be ineffective, since they do not take into account the structural features of fruit seeds, and are also not very adapted to significant fluctuations in the moisture of raw seeds and the unevenness of their receipt on drying. The most appropriate method of drying fruit seeds is the use of infrared radiation and a vibro-boiling layer.

The article notes the risks to the growth of energy potential in connection with the recent adoption by the Government of the Russian Federation of the Paris Climate Agreement. According to the latest UN data, the concentration of greenhouse gases in the atmosphere continues to increase. Consequently, Russia will be required to bring the reduction of CO2 emissions to 33- 40%, which will entail a decrease in the production, including energy generation, at the base of fossil fuels. At the same time, in the decisions of the Paris Agreement there are no specific tools to control the “low-carbon” production. This can lead to biased decision-making on the problems of “low-carbon” production both at the global and national levels. A rating system is proposed that provides weighted average numerical indicators of the efficiency of generating enterprises in the release of toxic ingredients and greenhouse gases, taking into account energy costs for restoring the air area around the source of emission. The rating assessment methodology was validated for the category of sources “stationary fuel combustion” during power generation. The results of calculations by the proposed method, obtained taking into account the actual load of the facilities, showed the physical adequacy and objectivity of the assessment of energy generation at thermal plants for various purposes for the emission of multidirectional pollutants. The presented rating characteristics can be used on a global and / or national scale, as well as for internal purposes of organizations, for example, when comparing their objects in order to indicate bottlenecks in real production conditions.

The paper presents the results of wind monitoring carried out in order to confirm the feasibility of building a wind farm in the Republic of Tatarstan. The task of wind monitoring is to determine and study the dynamics of the average annual wind regime and calculate the wind energy potential at promising sites for placing a wind power plant. On the given sites, after the annual cycle of meteorological parameters measurements, the average annual wind speeds, wind power, preferred directions, wind density, vertical profile of the wind flow and other data necessary for a detailed calculation of the wind power potential of the sites and the selection of specific models of wind generators and their arrangements for operation will be determined at these sites. An important component of the work performed is the development of methods for calculating wind potential at heights other than the heights of direct measurements.

The article deals with the modeling of heat transfer process in a drum reactor of a semi-coking unit of oil shale with a solid coolant between ash and shale particles in the conditions of constant separation of vapor-gas products. The dominant role of the convective component of the process is revealed and the curves of heating of shale particles are obtained taking into account the endothermic effect.

It is established that the smallest fraction of fuel warms up within 30-60 seconds and further serves as a source of heat for other fractions. In the interval of 400-600 seconds, the heating of the largest fraction is completed. The further stay of the shale mixture in the reactor is caused by the lagging rate of the thermal decomposition process from heat exchange, and the temperature decrease by 20-25⁰C by the presence of the endothermic effect of the decomposition of organic matter.

The analysis of various designs (both traditional and alternative) for outboard bearing housing joints with cylinders of steam turbines of medium and high power. Taking into account the identified similarities in the interaction of elements of the considered structures, a generalized kinematic model of the thermal expansion system of a steam turbine is presented. In the assumed model, the thermal expansion system is presented in the form of a multi-link hinged system consisting of one or more “basic” modules. Based on the developed model, the stability conditions (the absence of self-braking on the guiding longitudinal keys) against external influences are studied for the thermal expansion system of a steam turbine. According to the simulation results, it is shown that the magnitude of the turbine cylinder rotation angle change relative to the bearing housing in the junction must be limited. It was revealed that for stability of a system with one outboard bearing housing, it is sufficient that the maximum rotation angle at the junction of the turbine cylinder and the bearing housing does not exceed the maximum rotation angle of the bearing housing relative to the longitudinal keys. For stability of a system with several sequentially moving outboard bearing housings (multi-cylinder turbine), it is necessary that the limiting angle of rotation at all junctions of the turbine cylinders with bearing housings does not exceed the value of the smallest limiting angle of rotation for all bearing housings. The results of the study can be applied in the design of new steam turbines and in the reconstruction of thermal expansion systems for equipment in operation.

The problem of ensuring a uniform velocity field at the air inlet to the first stage of the gas turbine compressor SGT5-2000E with an angular inlet path, that contains an inlet filter, a silencer and an angular intake flare, is considered. Based on the mathematical modeling of the flow in this flare, it was found that the maximum speed at the compressor inlet is 36% higher than the average flow rate. It leads to the fact that the range of stable operation of the compressor seriously narrows. To solve this problem, it is proposed to change the intake flare design so that a newly developed effective damper of uneven velocity fields is installed in its flow part. Studies have shown that in this way the nonuniformity coefficient was reduced from the above 36% to 6%.

The article discusses the scheme of deep utilization of the heat of flue gases. It has been established that in boiler units operating on natural gas, the only way to significantly improve the use of fuel is to deeply cool the combustion products to a temperature at which it is possible to condense the maximum possible portion of the fumes contained in the gases. To analyze the main energy indicators of the condensing unit and optimize its operating modes, a priority scheme was simulated in Aspen Plus. In this scheme, there are tees, heat exchangers and a reactor (boiler furnace). The configuration of tees (mixers) is carried out by setting the costs or fractions of two flows entering or leaving the element. The boiler furnace is modeled as a Gibbs reactor, which calculates the chemical and thermodynamic equilibrium by minimizing the difference in the Gibbs energy of the products and the starting materials. Using the Aspen Plus computer program, the condensation unit circuit was simulated at the PTVM-100 boiler unit with the specification of the optimal operating parameters of material flows and heat exchange equipment. The calculations show that when using a condensing boiler, a triple energy effect is achieved: the physical heat of the flue gases is used; the latent heat of vaporization released during condensation is used; the condensate released from the flue gases is used.

The article concentrates on the topical issue connected with the detection of defects in the rotor winding of electric machines. The experimental sampling and digital processing of electrical signals from controlled windings is in the basis. The authors conducted the research using two experimental units for asynchronous motor and synchronous generator, respectively. A distinctive feature of the proposed research stands is in solving the problems of digital processing and data analysis on the basis of the application of microprocessor relay protection unit BMRZ developed in Russia. The authors applied method of wavelet decomposition to select the detailing component. They also presented the results of experiments for the breakage in the short-circuit rotor of an asynchronous motor and proved that the microprocessor-based BMRZ device is capable of digitizing at a sampling rate that meets the requirements, and in conjunction with the data processing algorithms that carry out the selective determination of hard-to-detect defects, is applicable in the diagnosis of electrical machines.

At the design and testing stage of electromechanical converters, the analysis of the influence of parametric perturbations on the dynamic properties of an object using sensitivity theory, which allows to evaluate the quality of operation of electrical machines depending on operating conditions, is relevant. Based on the system of differential equations of a DC motor, the sensitivity equations of the corresponding coordinates were obtained in three parameters. A vector structural scheme of the sensitivity model has been formed, as well as the Simulink-model, with the help of which sensitivity function plots were obtained, which determine the additional motion of the object of study when parameters change within specified limits. It is shown that the largest steady-state values of the sensitivity functions correspond to changes in the moment of inertia. It is revealed that the influence of the moment of inertia on the coordinates of the object of study is the most significant. Where in the coordinate most sensitive to variations in parameters is the rotation speed of the electromechanical converter. The problem of statistical analysis of errors of the output coordinates of a DC motor under the assumption of normal distribution of parametric disturbances was also solved. Simulations were carried out and dispersions and relative estimates of the influence of variable parameters were calculated, and graphs were obtained to estimate the degree of influence of parametric disturbances.

In this paper described the switching power supply (SPS) unit and represented its importance for electronic circuits in electronic devices. SPS directly affect the operation of electrical circuits and electronic equipment. In particular, this paper describes its use in a portable proton-magnetic resonance (PMR) relaxometer. Especial attention is to the method of constructing the circuit, and also deals with the comparense of the SPS with a transformer power source. This article presents the structure of schematic diagram of the SPS. The SPS structure works without a transformer, which reduces the size of the system and increases overall efficiency. The proposed circuit structure is based on a push-pull controller, a high- frequency converter with an amplifier and a voltage multiplier circuit and a voltage stabilizer. The simulation and experiments confirm the proposed configuration of SPS.