Abstract
This paper presents an optimized single-phase three-level boost DC-link cascade H-bridge multilevel inverter (TLBDCLCHB MLI) system to generate a seven-level stepped output voltage waveform for photovoltaic (PV) applications. The proposed TLBDCLCHB MLI system is obtained by integrating a three-level boost converter (TLBC) with a seven-level DC-link cascade H-bridge (DCLCHB) inverter. It consists of a TLBC, level generation unit (LGU) and phase sequence generation unit (PSGU). When compared with traditional boost converter-fed multilevel inverter systems, the proposed TLBDCLCHB MLI system requires a single DC source, fewer power switches and gate drivers. Reduction in the switch count and number of DC sources makes the system cost effective and requires a smaller installation area. Pulse generation for the power switches of an LGU in a DCLCHB inverter is accomplished by providing proper conducting angles that are generated by optimized conducting angle determination (CAD) techniques. In this paper two CAD techniques i.e., equal-phase CAD (EPCAD) and step pulse wave CAD (SPWCAD) techniques are proposed to evaluate the performance of the proposed system in terms of the total harmonic distortion (THD) and the quality of the stepped output voltage waveform. The proposed system has been modeled and simulated using MATLAB/SIMULINK software. Results are presented and discussed. Also, a prototype model of a single-phase TLBDCLCHB MLI system is developed using a field-programmable gate array (FPGA)-based pulse generation with a resistive load and its performance is analyzed for various operating conditions.
Highlights
Development in power electronics lay down a widespread scope for the resourceful operation of power converters
multilevel inverters (MLIs) system is in shown system consists of single voltage source, three-level boost converter (TLBC), and inverter to proposed TLBDCLCHB MLI system consists of single DC voltage source, TLBC, and DC-link cascade H-bridge (DCLCHB)
The output of TLBC is measured and fed to an integral controller by controller comparing with the required reference output voltage to vary the duty cycle
Summary
Development in power electronics lay down a widespread scope for the resourceful operation of power converters. In PV power generation, boost converters and multilevel inverters (MLIs) are playing a major role in power conversion. Of the traditional boost converters unable toarea, produce a high inverter consists of a greater number components, requires a largerare installation is bulky in boostand ratio [5,6].This paper proposesboost a three-level boost a high size, costly. With a high boost for ratio, onItone width modulation (PWM)-controlled capable of maintaining an equal in all one inductor, capacitors, and boost (2N-1)converter diodes for ‘N’ levels. MLI system is modeled, volt-second area equal to step pulse wave techniques are proposed to evaluate the performance of the simulatedinverter and validated through TLBDCLCHB experimental MLI setup using field-programmable gate array [12]. Through experimental setup using field-programmable gate array (FPGA)-based pulse generation
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
