Analysis of line-commutated converters during unbalanced operating conditions

摘要

In this paper, a method of analyzing the salient performance characteristics of line-commutated power converters during unbalanced operating conditions is presented. Simple analytical relationships are established which relate the negative-sequence component of AC current to the negative-sequence component of voltage. These results are verified using a detailed valve-by-valve simulation of a line-commutated inverter connected to a photovoltaic array.