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A Capacitance Estimation of Film Capacitors in an LCL-Filter of Grid-Connected PWM Converters
Hong-Jun Heo,Won-Sang Im,Jang-Sik Kim,Jang-Mok Kim 전력전자학회 2013 JOURNAL OF POWER ELECTRONICS Vol.13 No.1
A capacitor deterioration of LCL-filter grid-connected PWM converters is progressed by the self-healing mechanism. It leads to the degradation of the filter performance and drop of power factor. Thus, it is required to diagnose fault-point of capacitors and determine the replacement time. Typically, the fault of capacitors is determined when the capacitance is reduced up to 80% from initial value. This paper proposes algorithm to the determine capacitor replacement time of an LCL filter. The algorithm takes the advantage of change of the response on the injected resonant frequency corresponding to 80% value from the initial capacitance. The results of the algorithm are demonstrated through simulations and experiments.
A Capacitance Estimation of Film Capacitors in an LCL-Filter of Grid-Connected PWM Converters
Heo, Hong-Jun,Im, Won-Sang,Kim, Jang-Sik,Kim, Jang-Mok The Korean Institute of Power Electronics 2013 JOURNAL OF POWER ELECTRONICS Vol.13 No.1
A capacitor deterioration of LCL-filter grid-connected PWM converters is progressed by the self-healing mechanism. It leads to the degradation of the filter performance and drop of power factor. Thus, it is required to diagnose fault-point of capacitors and determine the replacement time. Typically, the fault of capacitors is determined when the capacitance is reduced up to 80% from initial value. This paper proposes algorithm to the determine capacitor replacement time of an LCL filter. The algorithm takes the advantage of change of the response on the injected resonant frequency corresponding to 80% value from the initial capacitance. The results of the algorithm are demonstrated through simulations and experiments.
A Capacitance Estimation of Film Capacitors in an LCL-Filter of Grid-Connected PWM Converters
허홍준,임원상,김장식,김장목 전력전자학회 2013 JOURNAL OF POWER ELECTRONICS Vol.13 No.1
A capacitor deterioration of LCL-filter grid-connected PWM converters is progressed by the self-healing mechanism. It leads to the degradation of the filter performance and drop of power factor. Thus, it is required to diagnose fault-point of capacitors and determine the replacement time. Typically, the fault of capacitors is determined when the capacitance is reduced up to 80% from initial value. This paper proposes algorithm to the determine capacitor replacement time of an LCL filter. The algorithm takes the advantage of change of the response on the injected resonant frequency corresponding to 80% value from the initial capacitance. The results of the algorithm are demonstrated through simulations and experiments.