Modes of electrical systems and grids with renewable energy sources

Abstract

The main task of electric power networks is providing effectively the needs of consumers in energy of the appropriate quality at minimum costs and sufficient level of reliability. This causes a constant increase in the size of the grids and the complexity of the structure. In its turn these conditions lead to a combination complex problem of the transformation, stabilization of parameters and transport of electricity. At the same time, with the development of new technological processes, the share of asymmetric, nonlinear and dynamic consumers of electricity is continuously increasing. In practice, all this leads to the fact that in electrical networks such factors of electricity distortion of quality as deviation, oscillation, asymmetry and non-linearity of voltage have become permanent disturbances. They significantly reduce the efficiency of both: the power supply system`s themselves and consumers which are power supplied them.