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Author: search.filters.author.Khomfoi, SurinSubject: search.filters.subject.Solar farm

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    Deteriorated solar panel detection technique of SST for a solar farm application
    (2019-03-01)
    Khemmook, Panya
    ;
    Khomfoi, Surin
    ;
    Phophongviwat, Teeraphon
    ;
    Pairindra, Worapong
    This proposed paper introduces the fault detection method for solar cell with Box Plot technique on the Solid State Transformer (SST) for the solar farm application. The Box Plot technique with inclusive quartile value is functioned for finding the upper and lower limit for data analysis. Normally, the fault detections of solar panels are found by using the PV string current from the SST to calculate the upper and lower limit of the Box Plot. If one of the string currents is in the specific outer boundary, therefore, the solar panels are in non-operational condition mode. Generally, the fault detection testing for the solar panels can be categorized in 5 cases: normal condition, open circuit condition, line-line condition, partial shading condition and degradation condition. Finally, based on the simulation result and the actual results, the Box Plot is able to monitor the performance of the PV string according to various conditions as efficiently as possible and accurate.
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    The implementation of SHE control technique for the SST with CHB seven-level waveform on the solar farm applications
    (2019-03-01)
    Khemmook, Panya
    ;
    Khomfoi, Surin
    ;
    Phophongviwat, Teeraphon
    ;
    Pairindra, Worapong
    This proposed paper presents the use of selective harmonic elimination (SHE) technology to control the cascaded H-Bridge Multi-level Inverter (CHBMI) for power transferring over the high frequency transformer (HFT), which is a part of the SST for applying to a solar farm. Apparently, the converter is using the seven-level CHBMI and the SHE technique to get rid of the 5<sup>th</sup> harmonic and 7<sup>th</sup> harmonic to find a set of angles θ<inf>1</inf>, θ<inf>2</inf> and 63 with the lowest 3<sup>rd</sup> harmonic. The calculated angles are used in each modules. Obviously, the simulation has shown that, at m<inf>a</inf>=2.43, θ<inf>1</inf>=11.6782°, θ<inf>2</inf>=26.8870° and θ<inf>3</inf>=56.0271°. The total harmonic distortion (% THDv) will be lowest at 9.35%. According to the experimentation, the SHE technique with low % THDv can reduce the power loss at HFT compared to the square wave transmission technique which the % THDv is high.