Performance of isolated generating system with multilevel inverter using photovoltaic source

Abstract

Solar PV is one of the demanding nonconventional sources for generation of electricity but it has its own limitation due to non-linear characteristics. Solar PV needs MPP tracker to extract maximum power form solar PV source. Furthermore, multilevel voltage source inverter (VSI) is used for converting dc voltage into closed to sinusoidal ac supply. In this paper, incremental conductance (IC) technique for tracking maximum solar power is proposed with five-level VSI for converting solar PV dc voltage into three phase ac output voltage. Moreover, a unipolar PWM technique is proposed for VSI to producing gating pulses for Insulated gate bipolar transistor (IGBT) used in the VSI. Multilevel inverter is used to reduce filtering requirements and to reduce amplitude of all harmonics in inverter output. The complete model is simulated in MATLAB/SIMULINK and extensive simulations are carried out to validate the proposed system.

Multi-cell resonant boost converter based off-grid solar-PV system

“…Solar photovoltaic (PV) is widely used all around the world due to the following aspects [1]: renewable energy source, pollution free, reduced carbon footprint, ensured energy security, ease of installation and transportation etc. The main disadvantages of solar PV are: power generation dependency on solar irradiation & temperature and nonlinear power generation characteristics [2,3]. The power generation dependency on solar irradiance and temperature is overcome by the use of energy buffer for offgrid system [4][5].…”

“…Therefore, a conventional DC-DC boost converter is widely employed as an MPPT device [6][7][8] and controlled by commonly used MPPT algorithm such as: perturbation and observation (P&O), incremental conductance (IC), artificial intelligence, ripple correlation (RC) etc. [2][3][5][6]. The use of conventional boost topology as MPPT device has the following draw-backs: higher conduction and switching losses, high voltage/current stresses on switching device, high current spike, a weak output regulation and high output voltage ripple [9][10].…”

Performance analysis of fuel cell assisted distributed generation system

“…Multilevel inverters are the best choice for generation of good quality A.C [5] and poses various advantages included, lesser dv/dt stress [6], lesser harmonic distortion as compared to traditional two-level inverter [7] [8]. Most commonly used multilevel inverter topologies are 1) Diode Clamped multilevel inverter (DCMI) 2) flying capacitor multilevel inverter (FCMI) and 3) H-bridge multilevel inverter [9][10][11][12].…”