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Full-Text Articles in Electronic Devices and Semiconductor Manufacturing
A Fast-Converging Mppt Technique For Photovoltaic System Under Fast Varying Solar Irradiation And Load Resistance, Saad Mekhilef
A Fast-Converging Mppt Technique For Photovoltaic System Under Fast Varying Solar Irradiation And Load Resistance, Saad Mekhilef
Saad Mekhilef
Under fast varying solar irradiation and load resistance, a fast-converging maximum power point tracking system is required to ensure the photovoltaic system response rapidly with minimum power losses. Traditionally, maximum power point locus was used to provide such a fast response. However, the algorithm requires extra control loop or intermittent disconnection of the PV module. Hence, this paper proposes a simpler fast-converging maximum power point tracking technique, which excludes the extra control loop and intermittent disconnection. In the proposed algorithm, the relationship between the load line and the I–V curve is used with trigonometry rule to obtain the fast response. …
Novel Configuration For Multilevel Dc-Link Three-Phase Five-Level Inverter, Saad Mekhilef
Novel Configuration For Multilevel Dc-Link Three-Phase Five-Level Inverter, Saad Mekhilef
Saad Mekhilef
new multilevel DC-link three-phase five-level voltage source inverter topology is introduced here. A multilevel DClink formed from single DC voltage supply and two cascaded half-bridge (CHB) power cells is connected to 12-switch threephase bridge in such a way that the proposed inverter produces five levels in the output voltage waveform. Compared to comparable inverters, such as symmetrical CHB and hybrid multilevel inverters, the proposed topology maximises the number of voltage levels and reduces the number of utilised DC voltage supplies, switches, gate driver circuits and installation area. A modified fundamental frequency modulation technique based on determination of switching states of …
Boundary Control Of Dual-Output Boost Converter Using State-Energy Plane, Saad Mekhilef
Boundary Control Of Dual-Output Boost Converter Using State-Energy Plane, Saad Mekhilef
Saad Mekhilef
A boundary control scheme for dual-output boost converter (DBC) with enhanced performance using second-order switching surface is presented in this study. The derivation of the switching surface is performed in state-energy plane rather than the state-plane to obtain a general geometrical representation that provides a good dynamic response during start-up and sudden load changes, achieving steady state in two switching actions. To illustrate the control characteristic and performance, a detailed mathematical analysis is fully developed and compared with other control methods for the DBC. The proposed control was simulated, implemented in a digital signal processor TMS320F2812, and tested using prototype …
Modified Incremental Conductance Algorithm For Photovoltaic System Under Partial Shading Conditions And Load Variation, Saad Mekhilef
Modified Incremental Conductance Algorithm For Photovoltaic System Under Partial Shading Conditions And Load Variation, Saad Mekhilef
Saad Mekhilef
Under partial shading conditions, multiple peaks are observed in the power–voltage (P–V ) characteristic curve of a photovoltaic (PV) array, and the conventional maximum power point tracking (MPPT) algorithms may fail to track the global maximum power point (GMPP). Therefore, this paper proposes a modified incremental conductance (Inc Cond) algorithm that is able to track the GMPP under partial shading conditions and load variation. A novel algorithm is introduced to modulate the duty cycle of the dc–dc converter in order to ensure fast MPPT process. Simulation and hardware implementation are carried out to evaluate the effectiveness of the proposed algorithm …
Long-Term Wind Speed Forecasting And General Pattern Recognition Using Neural Networks, Saad Mekhilef
Long-Term Wind Speed Forecasting And General Pattern Recognition Using Neural Networks, Saad Mekhilef
Saad Mekhilef
Long-term forecasting of wind speed has become a research hot spot in many different areas such as restructured electricity markets, energy management, and wind farm optimal design. However, wind energy with unstable and intermittent characteristics entails establishing accurate predicted data to avoid inefficient and less reliable results. The proposed study in this paper may provide a solution regarding the long-term wind speed forecast in order to solve the earlier-mentioned problems. For this purpose, two fundamentally different approaches, the statistical and the neural network-based approaches, have been developed to predict hourly wind speed data of the subsequent year. The novelty of …