Structures of Single-Phase Convertors Units for Combined Electrical Supply Systems With Photoelectric Solar Panels

Abstract

Schematic solutions of single-phase converter units for combined electrical supply systems with a power active filter function are considered with 24-hour operation and taking into account the voltage variation of the photovoltaic solar battery and using the improved principle of inverter current generation with a fixed carrier frequency. The selection of the power circuit parameters, of the settings of the values of the carrier frequency and the deviation of a current are justified. A variable structure of the control system with a slave circuit of inverter output current and various external regulators for day, night and autonomous operation modes is proposed. Results of modeling for the system: "network -unit with serial connection of inverters with solar batteries -load" are given. References 7, figures 5, tables 2. 1 / 4 N2 s6Key words: combined electrical supply system, power active filter, photovoltaic solar battery, cascade circuit of a grid inverter, energy losses in switches.

Improvement of the current control loop of the single-phase multifunctional grid-tied inverter of photovoltaic system

“…The best indicators when using i Cf current coupling to compensate for the effect of the non-sinusoidal voltage of the DG is achieved in the case of setting the value δ according to (3) in combination with DK. In Table 2, THDi g values are given in the presence of harmonic with order n in the DG voltage in the case of using i Cf current coupling for the minimum values of * , gm I…”