Interaction between coordinated and droop control PV inverters

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

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

7 Citations (Scopus)


Autonomous droop control PV inverters have improved voltage regulation compared to the inverters without grid support functions, but more flexible control techniques will be required as the number of solar photovoltaic (PV) installations increases. This paper studies three inverter future deployment scenarios with droop control inverters, non-exporting inverters, and coordinated inverter control (CIC). The network operation and the interaction between various inverter control methods are studied by simulating inverter operation on two low-voltage networks. Considering 30% PV penetration as the base case, we demonstrate that coordinated inverters can mitigate overvoltages and voltage fluctuations caused by the tripping of passive inverters in 85% of PV location cases when at least as many coordinated as passive inverters are deployed on the 114-node test feeder. However, this rate reduced to 37% with the IEEE 906-node network demonstrating that the deployment of coordinated inverter control may not be able to reverse passive inverter-related voltage disturbances when the build-up of passive inverters has reached a certain threshold. The aggregated PV output from coordinated inverters can be also used to provide grid support services. When the low-voltage networks operate close to the upper voltage limits, the change in the power output from coordinated inverters following a regulation request may be partially offset by passive inverters. Considering an equal number of passive and coordinated inverters, this paper shows that for each unit of the down-regulation request delivered by coordinated inverters, passive inverter output may increase by up to 0.2 units and decrease by up to 0.45 units during coordinated inverter up-regulation.

Original languageEnglish
Title of host publicationProceedings of The Eleventh ACM International Conference on Future Energy Systems
EditorsDan Wang, Ramesh Sitaraman
Place of PublicationNew York NY USA
PublisherAssociation for Computing Machinery (ACM)
Number of pages11
ISBN (Electronic)9781450380096
Publication statusPublished - 2020
EventInternational Conference on Future Energy Systems 2020 - Virtual, Australia
Duration: 22 Jun 202026 Jun 2020
Conference number: 11th (Proceedings)


ConferenceInternational Conference on Future Energy Systems 2020
Abbreviated titlee-Energy 2020
Internet address


  • ancillary services
  • centralised control
  • low-voltage networks
  • PV inverters
  • voltage regulation

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