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A Study on Cross-Harmonic Generation by Large Three-phase Inverters in Solar Farm Environments

Conference Paper


Abstract


  • Cross harmonic generation by grid-connected high power inverters take place due to the asymmetry of inverter controllers in the presence of background harmonics in the grid. Although cross harmonic generation is often neglected in harmonic studies, the investigations reported in this paper show that the grid current magnitudes at cross harmonic frequencies can become relatively significant in some situations and hence cannot be ignored in harmonic compliance studies. This is demonstrated using example studies employing a single grid connected inverter model and a large scale three-phase solar farm model. Furthermore, an inverter harmonic model is proposed that can be used to determine the harmonic currents injected by an inverter at both the background harmonic frequency in the grid and at the cross harmonic frequency. The proposed model is validated using EMT simulation results.

Publication Date


  • 2022

Citation


  • Liyanage, S., Perera, S., & Robinson, D. (2022). A Study on Cross-Harmonic Generation by Large Three-phase Inverters in Solar Farm Environments. In Proceedings of International Conference on Harmonics and Quality of Power, ICHQP Vol. 2022-May. doi:10.1109/ICHQP53011.2022.9808557

Scopus Eid


  • 2-s2.0-85133772069

Web Of Science Accession Number


Volume


  • 2022-May

Abstract


  • Cross harmonic generation by grid-connected high power inverters take place due to the asymmetry of inverter controllers in the presence of background harmonics in the grid. Although cross harmonic generation is often neglected in harmonic studies, the investigations reported in this paper show that the grid current magnitudes at cross harmonic frequencies can become relatively significant in some situations and hence cannot be ignored in harmonic compliance studies. This is demonstrated using example studies employing a single grid connected inverter model and a large scale three-phase solar farm model. Furthermore, an inverter harmonic model is proposed that can be used to determine the harmonic currents injected by an inverter at both the background harmonic frequency in the grid and at the cross harmonic frequency. The proposed model is validated using EMT simulation results.

Publication Date


  • 2022

Citation


  • Liyanage, S., Perera, S., & Robinson, D. (2022). A Study on Cross-Harmonic Generation by Large Three-phase Inverters in Solar Farm Environments. In Proceedings of International Conference on Harmonics and Quality of Power, ICHQP Vol. 2022-May. doi:10.1109/ICHQP53011.2022.9808557

Scopus Eid


  • 2-s2.0-85133772069

Web Of Science Accession Number


Volume


  • 2022-May