The main disadvantage of the existing microprocessor current protections of distribution networks lines of 6–35 kV is a comparatively short instantaneous trip zone of the first step and insufficient sensitivity of the third step in many cases of asymmetrical short-circuits. The noted disadvantages can be eliminated by changing the current settings of steps in concordance with detected two-phase fault modes. Asymmetrical fault mode detection can be carried out through checking of a relative asymmetry of currents in the line phases. The paper presents a comparative estimation of techniques for asymmetrical fault determination on distribution networks lines and contains an analysis of the results pertaining to the investigations on application of aforementioned techniques in the line microprocessor current protection algorithms. The investigations have been carried out while using a computing experiment method. The computing experiment has confirmed efficiency and high sensitivity of the proposed method, which makes it possible to clearly establish solid two-phase fault on both the controlled and contiguous lines. Using the computing experiment method the transient resistance influence in the fault location on the fault type determination accuracy has been also investigated.

The methodical approach to calculation of normal modes of open 6–10 kV-electrical networks has been developed in the paper. These networks contain generating sources of consumers; they are equipped with means for automatic voltage control and they are operating in parallel with the power system.

The paper shows that failure to take into account variable ratio of short-time emergency overloading of turbo-generators (synchronous compensators) that can lead to underestimation of overloading capacity or impermissible insulation over-heating.

A method has been developed for determination of permissible duration of short-time emergency over-loading that takes into account changes of over-loading ratio in case of a failure.

The paper considers an impact of various methods for control of an exciting current pertaining to a synchronous generator on the nature of transient processes. A control algorithm for the exciting current in relation to changes in sliding and acceleration of a generator rotor has been proposed in the paper. The algorithm makes it possible to improve quality of the transient processes due to reduction of oscillation range concerning as an active power so a δ-angle as well.

The variant of efficient combination of two renewable energy sources as a biogas system and a water heating solar system has been considered for power supply of individual dwellings. Criteria dependence has been suggested for determination of solar system power efficiency. Its legitimacy has been proved by an experiment. Power efficient solar system has been proposed with peculiar features of its designing and due account of energy flow distribution in technology of biogas production.

The paper provides description of a gas generator with a pulsating layer. Some hydrodynamic and heat-transfer peculiar features of the processes occurring in the gas generator with the pulsating layer have been presented in the paper.

The paper considers possibilities to organize power plantation for growing bio-mass in various countries. Examples of fast-growing cultures destined for various climatic zones have been given in the paper. The paper describes some technologies concerning production of motor oil.

The paper considers a high temperature influence on strength characteristics of steam pipelines and steam turbine parts of high and medium pressure. The charts showing a decisive temperature importance in diffuse creep have been presented in the paper. The paper contains
a calculation of steel self-diffusion coefficient. Dependence D_sd = f(t) for more accurate assessment of  resource characteristics of the applied steel has been proposed in the paper.

The paper presents results of mathematical investigations on distribution of air inflows in the ТП-87 boiler gas flue. Experiments have been executed on the basis of programming «Flow Vision» complex.

Criteria dependences for assessment of heat transfer value under conditions natural convection (a horizontal slot) have been obtained in the paper. The dependences are applicable for heaters in heat supply systems.

The paper considers a new design of a water well with an integrated circulation and reactant regeneration system. Water well drilling technique, its maintenance and modernization have been given in the paper. The paper presents expressions for calculation of static heave while extracting a filter and a column and a corresponding example.

The paper reveals economic peculiar features of innovative and investment processes in electric power industry. A scheme of organizing and economic mechanism for optimization of the industrial structure in the Belarusian electric power industry has been given in the paper. Realization of the mechanism will promote to better economic efficiency of power generation in the Belarusian power system and diversification of fuel balance of electric power industry.