Benchmarking of constant power generation strategies for single-phase grid-connected Photovoltaic systems

Ariya Sangwongwanich, Yongheng Yang, Frede Blaabjerg, Huai Wang

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

    26 Scopus citations

    Abstract

    With a still increase of grid-connected Photovoltaic (PV) systems, challenges have been imposed on the grid due to the continuous injection of a large amount of fluctuating PV power, like overloading the grid infrastructure (e.g., transformers) during peak power production periods. Hence, advanced active power control methods are required. As a cost-effective solution to avoid overloading, a Constant Power Generation (CPG) control scheme by limiting the feed-in power has been introduced into the currently active grid regulations. In order to achieve a CPG operation, this paper proposes three CPG strategies based on: 1) a power control (P-CPG), 2) a current limit method (I-CPG) and 3) the Perturb and Observe algorithm (P&O-CPG). However, the operational mode changes (e.g., from the maximum power point tracking to a CPG operation) will affect the entire system performance. Thus, a benchmarking of the proposed CPG strategies is also conducted on a 3-kW single-phase grid-connected PV system. Comparisons reveal that either the P-CPG or I-CPG strategies can achieve fast dynamics and satisfactory steady-state performance. In contrast, the P&OCPG algorithm is the most suitable solution in terms of high robustness, but it presents poor dynamic performance.

    Original languageBritish English
    Title of host publication2016 IEEE Applied Power Electronics Conference and Exposition, APEC 2016
    PublisherInstitute of Electrical and Electronics Engineers Inc.
    Pages370-377
    Number of pages8
    ISBN (Electronic)9781467383936
    DOIs
    StatePublished - 10 May 2016
    Event31st Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2016 - Long Beach, United States
    Duration: 20 Mar 201624 Mar 2016

    Publication series

    NameConference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC
    Volume2016-May

    Conference

    Conference31st Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2016
    Country/TerritoryUnited States
    CityLong Beach
    Period20/03/1624/03/16

    Keywords

    • Active power control
    • constant power control
    • maximum power point tracking
    • power converters
    • PV systems

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