Based on rich experience of planning development of electric power engineering in the USSR and with consideration of the process and foreign experience, the methodology of justifying development of electric power engineering systems (EPS), has been formulated, including analysis of regularities and trends in EPS development, as well as research of the external conditions of their development, formation and integral justification of EPS development scenarios, analysis and choice of solutions on EPS development.

The influence of direct current transfer, based on voltage converters, on long term modes of the power system has been reviewed. The structure of PPTN-regulators has been described. Adjusting capacities of the transfer are displayed at varying loads in the grid.

Investigation of the influence of parameters of the quadripole on the limit of transmitted power. Determination of the transmit power by means of virtual distant power lines. Experimental investigations were carried out with the help of certified software: Matlab, MathCAD. Proposed a theoretical method of calculating the parameters of the compensation or four-pole tuning, under which it agreed to the power line. Analyzed the influence of parameters of the quadripole on the limit of transmit power.

In industrial power supply systems a problem of decreasing energy losses by reactive power compensation appears. In carrying out a deep reactive power compensation it is necessary to select the powers of compensation units and their locations for minimizing the active power losses as well as minimize financial losses of installing the reactive power compensation units. Thus, there is a multi-factor multi-objective discrete-continuous optimization problem, which can be solved by stochastic population-based algorithms. A mathematical model of a power system’s section of an industrial enterprise of Angarsk was developed and formalized statement of multi-objective optimization problem was made up. The optimization problem has been solved by Adaptive Artificial Bees Colony Algorithms and Adaptive Particle Swarm Optimization using Genetic Algorithms for the adaptation. Computational experiments to optimize the power supply system and to generate the variants of quasi-optimal distribution of reactive power sources has been carried out. The effectiveness of different optimization algorithms has been compared and analyzed. The research results can be applied in the design of power supply systems of enterprises and in the optimization of existing systems to reduce the active power losses with the minimal cost of compensation units.

The approach of modeling the state of a large electrical system on the basis of the distribution coefficients of the regime parameters on the sub-division. The model takes into account the short-term forecast nodal regime parameters on the basis of the developed elements of artificial intelligence. Estimations of the proposed model for testing on a test example using elements of artificial intelligence to forecast the regime nodal parameters. The developed approach allows in general not only to simplify the task, but also to visualize the loss of power, energy connections between the nodes of the electrical system in terms of forecasting regime parameters.

The authors present an algorithm to estimate the parameters of a nonuniform three-phase line based on synchronized phasor measurements. Both systematic and random errors were taken into consideration when conducting simulations. The developed technique allows us to estimate the positive and zero sequence line parameters precisely enough, except for the resistances.

Аctive power flows over the section of the power system are monitored and regulated by the controller to ensure stability of the system. The values of some parameters of the regime, for example, the maximum power flow on the cross section, can significantly change. In some cases, such as when loosening scheme, it may trigger an emergency, which is expressed in excess of the maximum flow in the cross section. We propose a solution for the elimination of the emergency mode due to forced momentary voltage drop in the power supply system separate nodes. As a result of the operating conditions based on the typical static load characteristics was founded that forced voltage decreasing within the normalized initiated by the dispatcher, reduces the active power flow by network elements. Application of a voltage reduction allowed to return mode in the range of permissible values and to avoid customer curtailment. The research results can be applied in practice at liquidation of emergency operation as well as in some cases this can significantly reduce the amount of necessary trips or even avoid them.

The article considers the factors than affecting the radio signal loss of cellular communication. Presents existing models of radio signal loss of cellular communication and using the developed program to analyze these losses, depending on the basic parameters of the communication system and terrain. The method of loss calculation is required for the design of information-measuring systems.