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In last two decades, the installation of photovoltaic module is increasing recklessly and cost reduction is main factor in competition for large amount of energy generation. For feeding the maximum power to load from PV panel, the DC-DC converter is associated between PV module and load. The proposed topology using three level (TL boost converter for maximum power generation has specific characteristics such as to maintain high efficiency at medium voltage and high-power PV fed converter. The superiority of three level boost converter as compare to conventional DC-DC converter are less size of input inductor and voltage stress across switches. In this paper, the perturb and observation (P&O) MPPT control technique are used for extracting maximum power from solar PV panel and to controlling the duty cycle of switches used in TL boost converter. The realization of proposed system is completely done through MATLAB Simulink platform. The detailed operational analysis of three level (TL) boost converter is also carried out.

innovation of FACTS devises is the new trend to solve the power quality issues in the power system. In present time many flexible controller are emerging for power system application. SVC (static VAR compensator), TCPST (thermistor controlled phase shifting transformer), SSSC (static synchronous series compensator), UPFC (unified power flow controller), etc. are used in power quality improvement. In this paper unified power quality conditioning system is efficient to make up supply voltage and load current in multi-bus system. In the layout of MC-UPQC, one shunt and two series VSCs included. The VSCs are connected with common DC-link. M C- UPQC is an effective device for PQ issues in custom power application. The power quality improvement is analyzed with the comparison of the value of THD of proposed and without proposed.