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Advanced Detecting Approach of Distorted Currents Based on Transformation of dq Coordinates
Pages: 92-96
Year: Issue:  2
Journal: Journal of Liaoning Institute of Technology(Natural Science Edition)

Keyword:  dq coordinate transformationadvanced distorted current detectionphase locked loop;
Abstract: The advanced detecting approach of distorted currents based ondq coordinate transform was proposed in the article. Themethodby mathematical operation accurately calculates the fundamental positive-sequence voltage phase angle and the fundamental positive-sequence active current frequency to produce sine-cosine information makes use of dq coordinate transformation and forms a double-closed loop system, makes up the shortage of phase-locked loop and accurately detects the distorted currents. Simulation results prove that this improved method can be valid and feasible and improve the accuracy of the distorted current detection.
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