Analysis of PCC Point Harmonics Caused by Nonlinearities of Grid-Tied PV Inverters

Yong Zhao; Zi Long Yang; Du Feng Cao; Yi Bo Wang; Hong Hua Xu

doi:10.4028/www.scientific.net/AMR.1070-1072.1246

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 1070-1072Analysis of PCC Point Harmonics Caused by...

Analysis of PCC Point Harmonics Caused by Nonlinearities of Grid-Tied PV Inverters

Abstract:

Renewable energy are usually connected to the power grid through an inverter. As the penetration level of such inverter-based distribution generation resources increases, PCC point harmonics become an important concern for grid stability and power quality. In this paper, the PCC-point harmonics in a parallel-inverter-based photovoltaic station were measured and some significant characteristics of such harmonics were presented. These harmonics are stationary; the voltage and current waveforms are lower frequency, power correlation and inter-harmonic. And these harmonics are 3-phase symmetric and contain 3^rd and 6^th harmonic components. The transitions of the PCC harmonic occurrence and vanishing are instantaneous. The analysis indicates that the PCC harmonics are not produced by the resonances related to the linearities of PV inverters but the inverter nonlinearities are the primary reasons. The strategy to eliminate the PCC point harmonics are proposed in this study.

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Periodical:

Advanced Materials Research (Volumes 1070-1072)

Pages:

1246-1252

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1070-1072.1246

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Online since:

December 2014

Authors:

Yong Zhao*, Zi Long Yang, Du Feng Cao, Yi Bo Wang, Hong Hua Xu

Keywords:

Harmonic Resonance, Inverter Nonlinearity, PCC Harmonic, PV Inverter, Self-Oscillation

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