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In this study, two quadratic boost derived hybrid multi-output converter topologies are proposed. The proposed converters are capable of giving n-number of simultaneous ac and one dc outputs. The proposed converters are developed from a single switch quadratic boost converter by replacing its main switch by either n-number of series connected H-bridge or n-number of parallel connected H-bridge inverter topologies. The converter developed from n-series connected H-bridge inverters give series mode of the proposed converter and is capable of giving n-number of ac outputs with variable voltages and same currents (to all the ac loads) along with one dc output. Further, the converter developed from n-parallel connected Hbridge inverters give parallel mode of the proposed converter and can give n-number of ac outputs with same voltages (to all the ac loads) and variable currents along with one dc output. Due to the quadratic behaviour of the proposed hybrid multi-output converters, high voltage gain can be achieved from small shoot-through duty cycle. The proposed converter topologies can be applied for simultaneous dc/ac and dc/dc power conversion in a hybrid microgrid. Steady state and dynamic modelling have been carried out for analysing the steady state and transient behaviour of the proposed hybrid converters for two ac and one dc outputs. Simulation and experimental results are presented and efficiency analysis is carried out to validate the performance of the proposed converter topologies for two ac and one dc outputs.

Recently, switched-inductor Z-source inverters (SL-ZSIs) have been reported to achieve high-voltage gain and good power inversion operation at low shoot-through duty ratio D as compared to conventional ZSI. As the SL-ZSIs have high passive component count, weight, volume and losses of the system increases that lead to reduction in efficiency. To address the issues of conventional ZSI and SL-ZSIs, two single-phase switched LC (SLC)-ZSIs (Type 1 SLC-ZSI and Type 2 SLC-ZSI) are proposed in this study to achieve high-voltage gains at low values of D with lower passive component count as compared to SL-ZSIs. At low values of D, modulation index M approaches to higher values which results into improved AC output at reduced harmonic distortion. Due to low passive component count in the proposed inverters, weight, volume and losses decreases resulting into increase in efficiency. The proposed inverters can be used in various DC-AC and DC-DC power conversions in renewable energy applications due to their high-voltage gain, better immunity to EMI noise and higher reliability. The detailed steady-state analysis of the two proposed SLC-ZSIs is given in this study. Scaled down experimentation has been carried out to verify the performance of the proposed inverters.

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