Abstract-The use of a DC system in wind parks is becoming a more promising technology. Low weight and compact components in the offshore wind park are crucial to use due to strong wind perturbations out in the sea. A wind park with a DC collector is more compact than one using an AC collector. A DC collector employs power converters instead of 50- or 60-Hz power transformer. For similar voltage/current ratings, the power converter is compact and of small weight compared to the power transformer. The full-bridge voltage source converter is commonly used as topology of the power converter resulting high power losses. This article proposes the use of cascade connection of a non-controlled full-bridge diode rectifier and a controlled DC-DC boost converter. The proposed topology differs from the conventional full-bridge voltage source converter by having a reduced number of operating switches. The power loss is reduced, thus improving the efficiency of the wind park. A DC collection grid consisting of series-parallel connections of wind energy conversion units (WECUs) is investigated. The impact caused to the wind park for a fault or a collapse of a given number of WECU is analyzed and mitigated. It is demonstrated that the use of large numbers of wind energy conversion units in a wind park improves the fault ride-through capabiliy.


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    Title :

    Performance Analysis of Power Converter Based Active Rectifier for an Offshore Wind Park




    Publication date :

    2015




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English



    Classification :

    BKL:    53.33 / 53.33 Elektrische Maschinen und Antriebe



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