Grid Information Synchronous Monitoring Algorithm under Unbalanced and Distorted Condition

Abstract:

The Amplitude and angular frequency of grid voltage vector fluctuate with the positive and negative sequence components and harmonic component under unbalance and distortion grid model, the conventional grid information synchronous algorithm is not suitable. A novel grid information synchronous algorithm based on AC amplitude integral is proposed, which can obtain the information of phase angle, frequency and amplitude of the fundamental positive and negative sequence components of fundamental grid voltage using the synchronization phase locked technique. Experimental results show that the proposed algorithm is suitable to the unbalanced and distorted grid condition and can restrain the harmonic interference and achieve the grid information synchronous monitoring.

• Periodical: Advanced Materials Research (Volume 898)
• Pages: 867-872
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.898.867
• Online since: February 2014
• Authors: Wei Li*, Li Sun
• Keywords: AC Amplitude Integral, Distorted, Synchronization Phase Locked, Unbalanced

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