Reactive power injection strategies for single-phase photovoltaic systems considering grid requirements

Yongheng Yang, Huai Wang, Frede Blaabjerg

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

    25 Scopus citations

    Abstract

    As the development and installation of photovoltaic (PV) systems are still growing at an exceptionally rapid pace, relevant grid integration policies are going to change consequently in order to accept more PV systems in the grid. The next generation PV systems will play an even more active role like what the conventional power plants do today in the grid regulation participation. Requirements of ancillary services like Low-Voltage Ride-Through (LVRT) associated with reactive current injection and voltage support through reactive power control, have been in effectiveness in some countries. Those advanced features can be provided by next-generation PV systems, and will be enhanced in the future to ensure an even efficient and reliable utilization of PV systems. In the light of this, Reactive Power Injection (RPI) strategies for single-phase PV systems are explored in this paper. The RPI possibilities are: a) constant average active power control, b) constant active current control, c) constant peak current control and d) thermal optimized control strategy. All those strategies comply with the currently active grid codes, but are with different objectives. The thermal optimized control strategy is demonstrated on a 3 kW single-phase PV system by simulations. The other three RPI strategies are verified experimentally on a 1 kW singe-phase system in LVRT operation mode. Those results show the effectiveness and feasibilities of the proposed strategies with reactive power control during LVRT operation. The design and implementation considerations for the characterized strategies are also discussed.

    Original languageBritish English
    Title of host publicationAPEC 2014 - 29th Annual IEEE Applied Power Electronics Conference and Exposition
    PublisherInstitute of Electrical and Electronics Engineers Inc.
    Pages371-378
    Number of pages8
    ISBN (Print)9781479923250
    DOIs
    StatePublished - 2014
    Event29th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2014 - Fort Worth, TX, United States
    Duration: 16 Mar 201420 Mar 2014

    Publication series

    NameConference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC

    Conference

    Conference29th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2014
    Country/TerritoryUnited States
    CityFort Worth, TX
    Period16/03/1420/03/14

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