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A dc-Side Sensorless Cascaded H-Bridge Multilevel Converter Based Photovoltaic System Abstract In this paper a cascaded H-Bridge (CHB) multilevel converter based Photovoltaic (PV) system with no voltage or current sensors at the dc-side is proposed. Eliminating the dc-side sensors simplifies the hardware, leading to lower cost and higher reliability of the PV system. A novel scheme estimating the capacitors’ voltages from the output ac voltage of the inverter is developed. The scheme allows replacing all dc-side voltage sensors by a single voltage sensor at the ac-side of the converter. Furthermore, the dc current sensors, conventionally required for the maximum power tracking (MPPT), are also eliminated. Existing method In conventional CHB-MC based PV systems the dc current sensors are required by the MPPT module and the dc voltage sensors are required for the capacitors’ voltages control system and the Pulse Width Modulation (PWM) generator. Hence, in higher level converters, many isolated dc sensors are required, which increases the system cost and complexity. The capacitor voltage sensors were replaced by an observer in the CHB based STATCOM. However, the slow dynamics of the observer makes this method not suitable to perform the PWM switching or fast voltage control. Proposed method In this paper, for the first time, a dc-side Sensorless CHBMC based PV system which does not require any dc current or dc voltage sensors are proposed. Further Details Contact: A Vinay 9030333433, 08772261612 Email: [email protected] | www.takeoffprojects.com Circuit diagram CHB multilevel converter PV system Advantages Low cost of PV system Higher reliability of PV system Applications This can be used mainly in statcom type models and cascaded H-bridge Further Details Contact: A Vinay 9030333433, 08772261612 Email: [email protected] | www.takeoffprojects.com