Active power line conditioner utilizing harmonic frequency injection for improved peak voltage regulation

An active power line conditioner for electrical connection interposing an electrical energy source and an electrical load, said active power line conditioner comprising:

• series inverter means for electrical coupling to said electrical energy source to selectively provide an AC regulation voltage in series with an AC input voltage supplied by said electrical energy source;
• parallel inverter means for electrical coupling across said electrical load to selectively source and sink electrical current;
• a DC energy storage element electrically connected between said series inverter means and said parallel inverter means;
• control means for controlling said series inverter means and said parallel inverter means to regulate an AC output voltage across said electrical load during variations of said AC input voltage;
• said control means operative to maintain DC energy in said electrical energy storage element at a nominal DC energy level when said variations of said AC input voltage are within a sinusoidal regulation range of said active power line conditioner;
• and
• said control means further having harmonic means for regulating said AC output voltage to have at lease one harmonic frequency component superimposed on a fundamental frequency component thereof when said AC input voltage is not within said sinusoidal regulation range of said active power line conditioner.

An active power line conditioner to selectively condition electrical energy supplied from an electrical energy source to an electrical load, said active power line conditioner comprising:

• an inductive winding serially connectable between said electrical energy source and said electrical load;
• a parallel inverter generally electrically connectable across said electrical load, said parallel inverter including a DC energy storage element;
• control means for controlling said parallel inverter to effect the selected conditioning of electrical energy delivered from the electrical energy source to the electrical load;
• and
• said control means further having harmonic means for regulating said AC output voltage to have at least one harmonic frequency component superimposed on a fundamental frequency component thereof when said AC input voltage is not within a sinusoidal regulation range of said active power line conditioner.