Integrated local control of active power and voltage support for three-phase three-wire converters

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Abstract

The derivation of a robust control algorithm is presented to provide decoupled active power regulation and local grid voltage support in three-phase three-wire grid-connected converters (GCCs). Unlike conventional control schemes, the proposed strategy is designed to be harmonic sequence asym-metric for the purpose of local voltage unbalance correction. A frequency-domain Norton equivalent model is derived to illustrate the working principle of the strategy. Accordingly, by following a frequency-domain decoupled method, the funda-mental positive-sequence, the harmonic symmetrical sequences and the fundamental negative-sequence components are regu-lated independently. Consistent to the model analysis, simulation results validate reduction of local voltage unbalance and total harmonic distortion. Since no external sensors are required for the implementation of the strategy, it is a local approach, applicable to already-existing GCC systems. Moreover, in view of the higher switching frequencies as attainable by devices from the next SiC generation, the accuracy and dynamic behavior of the control algorithms can be much enhanced, improving therefore the quality of the processed energy.
Original languageEnglish
Title of host publication2019 IEEE 15th Brazilian Power Electronics Conference and 5th IEEE Southern Power Electronics Conference, COBEP/SPEC 2019
Place of PublicationPiscataway
PublisherInstitute of Electrical and Electronics Engineers
Number of pages6
ISBN (Electronic)978-1-7281-4180-0
DOIs
Publication statusPublished - 16 Apr 2020
Event5th IEEE Southern Power Electronics Conference - Santos, Brazil
Duration: 1 Dec 20194 Dec 2019
http://www.cobep-spec2019.org

Conference

Conference5th IEEE Southern Power Electronics Conference
Abbreviated titleIEEE SPEC 2019
Country/TerritoryBrazil
CitySantos
Period1/12/194/12/19
Internet address

Funding

FundersFunder number
European Union's Horizon 2020 - Research and Innovation Framework Programme783174
Electronic Components and Systems for European Leadership

    Keywords

    • Grid-interactive power converters
    • compensation
    • control
    • harmonics
    • voltage unbalance

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