The paper shows main development directions of power complex of the Republic of Belarus for the period of 2006-2010 that ensure power safety and country’s independence in energy. A special attention is paid to modernization of the main power system funds with the purpose to provide reliable operation and continuous power supply of the national economy.

The paper contains a comparative analysis of the known and proposed criteria for evaluation of schedule smoothness of power system load and calculative results of tariff plans that take into account as a schedule type of consumer and power system load and so the rate of their incompatibility. Some specific calculative formulae for determination of numerical characteristics of electric consumption tariff plans are proposed in the paper.

The paper considers a calculation of electromagnetic field in metal sheets and plates placed in inhomogeneous magnetic fields. Mathematical model equations have been obtained and a calculation method based on expansion of boundary conditions into double Fourie series is proposed in the paper. The paper contains common and particular expressions for field calculation using the known parameters of a source field, electromagnetic properties and dimensions of sheets and plates.

Various conditions with weak couplings are analyzed in the paper. It is proposed to consider a magnetic charge as an imaginary one in the imaginary space and real time. Following this representation Lorentz’s equation is validated and on the basis of it Maxwell’s equations derive as a consequence with justification of magnetic and electromagnetic fields. A brief review of the existing theories of the gravitational field origination is given in the paper.

The paper investigates computing characteristics of Newton methods by a parameter and two–parameter method of minimization in respect of poorly formulated algebraic systems of cubic and nonlinear equations of higher order. Some proposals are given to improve computing characteristics of the two-parameter minimization method while solving the problems concerning computation of steady modes in complex electric-power systems.

An aggregate model is taken with the purpose to create a complex model of a technological machine. This model is considered as a basic initial stage for constructing models of the next hierarchic levels and modeling algorithms. Means of system complex modeling of various design environments on the basis of the integrated aggregate model and distributed modeling method are considered in the paper.

Permissible long currents of cables with voltage 6-lOkV and cross-linked polyethylene insulation are considered in the paper. Smoothing functions have been obtained to estimate permissible long densities of the current in three- and single-core cables at various types of a lining and an arrangement. It is shown that in the field of large section conductors permissible values of current densities in heating can be less than economic ones.

Methodology for control over power efficiency of industrial consumers with complex technological structure (oil pipe-line transport is taken as an example) has been developed. This methodology is based on computing and statistical models of power consumption. Indices of subsystems affecting power consumption mode of the technological system as a whole are used as factors included in the model. A number of factors included in the model can be varied and a type of the model can be transformed due to a power-saving problem which is to be solved: execution of power investigation; forecasting and normalization of electric-power consumption, evaluation of target-oriented power-saving index.

A three-dimensional mathematical model for numerical modeling of burning process intended for a brick charge. The model presupposes natural air convection inside of the charge for tunnel ovens. Computer modeling of burning process for a charge fragment by specified temperature curve has been carried out. Calculations of temperature field taking place in the area of charge fragment are presented in the paper.

The paper proposes a target-oriented criterion that permits a power-unit operator remove fuel burn, that is originated in the process of equipment operation, with minimum losses.

Conventional methods for separation of liquid systems are out of use for cleaning liquid products of chemical technology from finely dispersed micro-quantity of iron-containing particles. Majority of these impurities is characterized by magneto-receptive behavior, in other words they exhibit a capability for magnetic precipitation; so application of magnetic precipitating filters shows promise for a removal of such particles.