Patent ID: 6014017
Filing Date: 2000-01-11
Classification: H02J,Y02E

Abstract:
A method for power factor correction of a non-ideal load fed from a mains power supply, which comprises:a) connecting electrically a compensation device in parallel with a load and the compensation device having a pulse converter with at least one capacitive store, a matching filter and a regulating and control device;b) determining a mains voltage space vector and a complex-conjugate mains current space vector from measured mains conductor voltages and mains currents of a mains power supply;c) determining a fundamental shift VAr of the mains power supply from the mains voltage space vector and the complex-conjugate mains current space vector;d) determining a transfer function space vector from the fundamental shift VAr and converting the transfer function space vector into control signals for the pulse converter;e) generating a compensator voltage space vector as a function of the transfer function space vector and of an intermediate circuit voltage of the at least one capacitive store;f) determining a mains power supply real power from the mains voltage space vector and the complex-conjugate mains current space vector;g) determining a required value for the fundamental shift VAr by multiplying the mains power supply real power by a constant;h) determining a required value for a compensator VAr as a function of a comparison of an actual value and the required value of the fundamental shift VAr;i) determining the compensator VAr from the mains voltage space vector and from a complex-conjugate compensator current space vector; andj) determining a basic transfer function space vector from a determined control error in the compensator VAr.