Harmonic minimization in HVDC systems through multiple injection of supplementary control signals

This paper is a discussion about multiple injection of supplementary signals of lower harmonic orders to minimize either voltage or current harmonics of lower larger amplitudes in HVDC converters. Through the proposed algorithm the injection of those signals can reduce the dimensions of the filtering equipment and liabilities, so much in the AC- as the DC-sides of the converter. The importance of this reduction is evidenced exactly by the more effectiveness in those lower harmonic orders, closer of the fundamental.