Unified constant-frequency integration control of three-phase power factor corrected rectifiers, active power filters and grid-connected inverters

A method for drawing or injecting sinusoidal current from or to a three phase power source by controlling an object circuit according to a control key equation comprising:

• deriving said control key equation by combining a characteristic equation of said object circuit, which characteristic equation defines the electrical characteristics of the object circuit, and a control goal equation, which defines the desired electrical performance which is the goal of controlling the object circuit;
• sensing the currents of said three phase power source or at least two switching currents of said object circuit, which switching currents are related to said currents of said three phase power source;
• and
• processing said sensed currents or at least two switching currents according to said control key equation to control said object circuit characterized by the characteristic equation to result in drawing or injecting sinusoidal current from or to said three phase power source to realize the performance defined by the control goal equation.