Research on Different Current Components Compensation Techniques in Nonsinusoidal Voltage Conditions

The paper presents a research on different methods of load nonlinearity compensation by a shunt APF when the grid voltage is distorted. The basis of the research is the Physical Components of Currents Power Theory by L. S. Czarnecki. Three basic compensation techniques are analyzed: sinusoidal current, quazi-linear load and constant active power consumption. Influence of each method on separate currents' physical components is shown as well as the power losses. The results obtained are verified by computer simulation.