Real field mission profile oriented design of a SiC-based PV-inverter application

C. Sintamarean, F. Blaabjerg, H. Wang, Y. Yang

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

    12 Scopus citations

    Abstract

    This paper introduces a real field mission profile oriented design tool for the new generation of grid connected PV-inverters applications based on SiC-devices. The proposed design tool consists of a grid connected PV-inverter model, an ElectroThermal model, a converter safe operating area (SOA) model, a mission profile model and an the evaluation block. The PV-system model involves a three level bipolar switch neutral point clamped (3L-BS NPC) inverter connected to the three phase grid through a LCL-filter. Moreover, the SOA model calculates the required converter heatsink thermal impedance Zth-H in order to perform in a safe mode for the whole operating range. Furthermore, the proposed design tool considers the mission profile (the measured solar irradiance and ambient temperature) from the real field where the converter will operate. Thus, a realistic loading of the converter devices is achieved. To consider one year real field measurements of the mission profile, an accurate long term simulation model is developed. The model predicts the junction and case temperature of the converter devices, for three different case scenarios. In the first case, a one year mission profile is used into the model with a sampling rate of five minutes. For the second and third case, a more detailed analysis is performed for one week mission profile (in the wintersummer time) with a sampling rate of 25 s. The simulation results shows the thermal loading distribution among the converter devices (MOSFET, IGBTFD) in terms of junction (average, peak, ΔT) and case (average) temperature for all three simulation cases. Finally, the evaluation block is used to analyze the results in order to perform a thermal loading-based classification of the converter devices.

    Original languageBritish English
    Title of host publication2013 IEEE Energy Conversion Congress and Exposition, ECCE 2013
    Pages940-947
    Number of pages8
    DOIs
    StatePublished - 2013
    Event5th Annual IEEE Energy Conversion Congress and Exhibition, ECCE 2013 - Denver, CO, United States
    Duration: 15 Sep 201319 Sep 2013

    Publication series

    Name2013 IEEE Energy Conversion Congress and Exposition, ECCE 2013

    Conference

    Conference5th Annual IEEE Energy Conversion Congress and Exhibition, ECCE 2013
    Country/TerritoryUnited States
    CityDenver, CO
    Period15/09/1319/09/13

    Keywords

    • design tool
    • mission profile
    • PV-inverters
    • SiC-devices
    • thermal loading

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