A novel harmonic current detection technique based on a generalized dq{sub}k coordinate transform for active power filter and fault protection of power system

摘要

The paper proposes a novel method of current detection for an active power filter and power system, it is based on a generalized dq{sub}k coordinate transform. The so-called dq{sub}k generalized coordinate is defined as the coordinate frame rotated at the angle frequency kω of the kth harmonic current. This method can effectively and accurately detect the fundamental current, its active and reactive components and any term harmonic current component of three-phase-circuit. The simulation results are carried out to verify the method of current detection.