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In this paper, analysis and simulation of a high-boost dc-ac inverter with maximum power point tracking for photovoltaic applications is done. High step-up, step-down features and immunity towards shoot-through are the main coveted features of an inverter for a reliable, efficient, and low-distorted dc-ac inversion. Z-source inverter (ZSI) carries these characters. However, higher number of passive...
This paper gives the detailed modelling, analysis and application of Open-End Winding Induction Motor (OEWIM) fed from PV source. The proposed configuration is the single stage solution, which takes care of Maximum Power Point Tracking (MPPT), DC-AC inversion three-level with V/f control. The proposed system finds application in areas where the grid is not accessible. The simplest and most widely...
With the deregulation of the electric power industry and the advancement of new technologies, the attention of the utilities has been drawn towards adapting Distributed Generation (DG) into their existing infrastructure. In this paper photovoltaic (PV) systems are modeled to study the effects of their interconnection in a distribution system. The system is a combination of the PV array, DC-DC boost...
In this paper, a novel maximum power point tracking algorithm based on the perturb-and-observe (P&O) technique is introduced. The novelty of the approach is represented by the perturbation of more control variables, rather than just one. This allows the increase of the power extracted from the photovoltaic (PV) field as compared to the case of perturbation of a single control variable. The proposed...
In conventional grid-connected PV system, the control of real and reactive power is undertaken adjusting both modulation index and phase angle of the inverter. The maximum power point of the PV array is tracked by adjusting duty cycle of the dc-dc converter or modulation index of the inverter. The PWM pattern has to be optimized each time the index of modulation is changed which involves excessive...
This paper presents photovoltaic (PV) grid-connected power conditioning systems based on Z-source inverter. Using Z-source network, the system can work within a range of PV array output voltage wider than that of the conventional boost converter. It allows the use of the shoot-through switching state for boosting the input voltage, compensates dead-time effect which causes serious output voltage distortions...
Photovoltaic (PV) arrays are always assembled based on centralized, string and multi-string technology. These complex configurations of PV arrays and non-dependent maximum power point tracking (MPPT) algorithms based on PV arrays but not PV modules lead to the low output power efficiency of PV arrays. In view of the above questions, this paper analyzes the output characteristics of PV arrays under...
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