Development of scientific fundamentals of building of multi-level voltage inverters for alternative power sources in the system Smart Grid

New conception of building of industrial multi-level autonomous invertors on the base of spectral orthogonal transforms of discrete functions with m-ary argument and m-ary counting system. Means and devices to compensate reactive load power for autonomous multi-level invertors are developed. Method for building of energy-supply systems on the base of multi-level invertors and parallel filter-compensating devices is proposed. Structure of power part and control system of three-phase autonomous invertors and system for providing of assigned value of non-symmetry factor are developed. Using of cells of multi-level inverter as compensating converter in filter-compensating device is proposed as economically attractive solution. It allows to combine the functions of source voltage forming and reactive power compensation within single multi-level inverter. The way of control of filter-compensating device supporting constant accumulator charge is proposed. System of complex monitoring and estimation of the parameters of electrical energy and the loads in Smart Grid is elaborated. The ways of control of electrical energy converters, generators and consumers at local technical or technological object by cost criteria are created.