In this paper, a two-stage renewable energy conversion system, consisting of boost dc-dc converter and a Ripple Switch Inductor Z-Source Inverter (rSL-qZSI), is proposed. In recent years, besides Voltage Source Inverter and Current Source Inverter, Quasi ZSI (qZSI) is getting focused because of having low device specifications for middle and high-power range applications. An Incremental Conductance (IC) based Maximum Power Point Tracking (MPPT) technique is used to develop the Pulse Width Modulated (PWM) signal for basic boost dc-dc converter for extraction of maximum Solar Photo-Voltaic (SPV) power in variable ambient conditions. Further a rSL-qZSI is used which has high voltage boosting capability and low switching device voltage stress compare to other conventional qZSI. Two different control methods, i.e. Maximum Boost Control (MBC) and Third Harmonic Injection (THI) control, are applied to boost the output voltage. In this paper operating principle, analysis and design of both dcdc converter and rSL-qZSI has been done. A comparative analysis has been shown between these control methods for different modulation index. To verify the performance of the proposed topology, a MATLAB simulation model has been designed. The implementation of MPPT along with the rSL-qZSI voltage boosting behavior has been verified through the simulation results.

Ripple SL-qZSI, MPPT, Maximum Boost Control(MBC), Third harmonic injection (THI) control.