The article considers the directions of development of energy, transport and water facilities through the use of liquefied natural gas.

Keywords: liquefied natural gas, energy, methane, motor transport

The article discusses topical issues related to modeling the physical processes in the operation of solar photovoltaic batteries. In the course of the research, the simulation of photovoltaic batteries was carried out in the MATLAB / Simulink / Simscape simulation environment. The output current of the solar cell is chosen as the main electrical parameter. The model is tested using the characteristics of the ABi-Solar P60270-D polycrystalline photo module.

Keywords: photovoltaic batteries, MATLAB / Simulink, voltage, solar energy, capacity, defects, control

The article presents the issues of the introduction of active energy complexes into the Russian energy system as an element of distributed generation for commercial and industrial consumers. In 2020, a pilot project was launched in Russia to create micro–energy systems for commercial and industrial consumers - active energy complexes. This form makes it possible to increase the efficiency of the Unified Energy System of Russia due to the possibility of optimizing the external network infrastructure and will allow businesses to reduce the cost of energy supply. The prerequisites for the development and implementation of the concept of active energy complexes in Russia were the increase in the cost of energy supply to enterprises, as well as the development of distributed generation and digital technologies.

Keywords: digital transformation of the electric power industry, active energy complexes, small generation, micro-energy system, gas-piston power plant

The Calculations of the electric network modes are based on the determination of electric power losses during transportation.The calculation methods used are based on the Newton method and the Jacobi matrix. The considered version of the calculation (by a number of transformations) with a small number of iterations allows to obtain the same results as when using the Newton method.

Keywords: matrix of nodal resistances, complex resistivity specific increments, losses of electric energy, compensating devices, algorithm, quadratic model, mathematical model