The added value of coordinating inverter control

Peter Lusis, Lachlan L.H. Andrew, Ariel Liebman, Guido Tack

Research output: Contribution to journalArticleResearchpeer-review

1 Citation (Scopus)

Abstract

Coordinated photovoltaic inverter control with centralized coordination of curtailment can increase the amount of energy sent from low-voltage (LV) distribution networks to the grid while respecting voltage constraints. First, this article quantifies the improvement of such an approach relative to autonomous droop control, in terms of PV curtailment and line losses in balanced networks. It then extends the coordinated inverter control to unbalanced distribution networks. Finally, it formulates a control algorithm for different objectives such as the fairer distribution of PV curtailment and rewarding PV customers for utilizing the excess power locally. The coordinated inverter control algorithm is tested on the 114-node and 906-bus LV European test feeders with cable sizes between 50 mm2 and 240 mm2 and validated with reference to OpenDSS. The results demonstrate that coordinated inverter control is superior when applied to high impedance LV networks and LV networks constrained by the distribution transformer capacity limits compared to autonomous inverters. On the 95 mm2 overhead line, it yields a 2% increase on average in the utilized PV output with up to 5% increase for some PV locations at higher penetration levels. Up to a 20% increase in PV hosting capacity was observed for location scenarios with PV system clustering.

Original languageEnglish
Pages (from-to)1238-1248
Number of pages11
JournalIEEE Transactions on Smart Grid
Volume12
Issue number2
DOIs
Publication statusPublished - Mar 2021

Keywords

  • Distribution networks
  • inverter control
  • PV curtailment
  • voltage regulation

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