Decentralised control of parallel inverters in an AC microgrid using downstream current as an implicit communication method

G. Mirzaeva, C. D. Townsend, D. Semënov, G. C. Goodwin

Research output: Chapter in Book/Conference paperConference paper

8 Citations (Scopus)

Abstract

Traditional droop control in AC microgrids relies on telecommunication between a central controller and distributed generators for frequency and voltage restoration. This makes optimal operation of the microgrid vulnerable to a single point of failure i.e. the central controller. The aim of this paper is to propose a decentralised control strategy that supplies the microgrid load with its demanded current in agreed and equitable fashion, based on local information only and using no telecommunications. Fundamental to the proposed concept is a parallel arrangement between distributed generators and the local loads. In this arrangement the locally measured downstream current is used to derive the current reference for the primary-level control loop in each distributed generator. Use of the downstream current as an implicit communication method facilitates stable operation of the microgrid and elimination of undesired circulating currents. The paper validates the developed concept via detailed simulations under a range of realistic scenarios.

Original languageEnglish
Title of host publicationProceedings - 2017 IEEE Southern Power Electronics Conference, SPEC 2017
PublisherIEEE, Institute of Electrical and Electronics Engineers
Pages1-6
Number of pages6
Volume2018-January
ISBN (Electronic)9781509064250
DOIs
Publication statusPublished - 6 Apr 2018
Externally publishedYes
Event2017 IEEE Southern Power Electronics Conference, SPEC 2017 - Puerto Varas, Chile
Duration: 4 Dec 20177 Dec 2017

Conference

Conference2017 IEEE Southern Power Electronics Conference, SPEC 2017
CountryChile
CityPuerto Varas
Period4/12/177/12/17

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