Online Estimation of Intrinsic Parameters of Encapsulated Three-Phase Harmonic Filter Capacitors for IoT Applications
Knowledge Transfer Office, City University of Hong Kong
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“Power electronics” is the use of electronic switching devices to efficiently convert and control electrical power. Power electronic systems, such as those in Internet of Things devices, contain input filters to prevent switching noise from contaminating the supply. However, they still generate low-order input current harmonics, causing voltage and current distortion in the distribution network and reducing the power quality of the grid. This is usually caused by the capacitance reduction of filter capacitors, which can lead to the failure of the capacitors. The possibility of failure can be detected through the regular measurement of capacitor voltages. However, detecting the permanent failure of filter capacitors in this manner is neither easy nor accurate using existing mechanisms. Therefore, more accurate technique, involving online estimation of the intrinsic parameters of encapsulated three-phase harmonic filter capacitors, has been developed.?
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