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This paper proposes a three-port Zeta-KY dc-dc converter which is fed with hybrid sources like photovoltaic (PV) cells and batteries. The converter proposed here is a multi-input single-output (MISO) structure which harnesses the benefits of Zeta and KY converters. The combination of these converters is highly advantageous since the Zeta converter provides lesser output voltage ripples with high gain and the KY converter topology suits well for withstanding load transients. The KY converter used in this research work is subjected to a topological change to facilitate bidirectional power flow. The bidirectional flow is essential to save the excess power in PV source in batteries during low load conditions. This novel multiport topology with bidirectional facility is first of its kind and has not been discussed earlier in the research arena. In the proposed work, two control algorithms are developed and deployed: the first one ensures the maximum power extraction from the PV and the second one maintains constant dc bus voltage and manages bidirectional power flow. MATLAB Simulink and hardware prototype of the proposed system has been realized for a 72 V dc bus and a 500 W electric vehicular drive. The simulation and experimental results reveal that the proposed system is viable for medium power electric shuttle applications. The proposed system is subjected to various test cases and it is observed that the source and load intermittencies are catered very well by the proposed three port Zeta-KY converter. The developed multiport converter is feasible for renewable energy applications.
Ilambirai Chandran; Sridhar Ramasamy; Mominul Ahsan; Julfikar Haider; Eduardo Rodrigues. Implementation of Non-Isolated Zeta-KY Triple Port Converter for Renewable Energy Applications. Electronics 2021, 10, 1681 .
AMA StyleIlambirai Chandran, Sridhar Ramasamy, Mominul Ahsan, Julfikar Haider, Eduardo Rodrigues. Implementation of Non-Isolated Zeta-KY Triple Port Converter for Renewable Energy Applications. Electronics. 2021; 10 (14):1681.
Chicago/Turabian StyleIlambirai Chandran; Sridhar Ramasamy; Mominul Ahsan; Julfikar Haider; Eduardo Rodrigues. 2021. "Implementation of Non-Isolated Zeta-KY Triple Port Converter for Renewable Energy Applications." Electronics 10, no. 14: 1681.
The output power of solar photovoltaic (PV) system is intermittent in nature with a non-linear output voltage. This has peak power points in accordance with varying irradiation and temperature. Hence a Maximum Power Point Tracker (MPPT), which is power extraction technique is essential in PV power systems to ensure maximum power delivery for a given point of time. Thenonlinear power voltage curve gets more intense when shading of PV panels takes place, as the panels receive irregular and different solar irradiation, which alters the profile of power –voltage (P-V) curves. Due to the partial shading, the panels exhibit peculiar multiple power peaks instead of one single peak as in the case of uniform irradiation and as a result the conventional MPPT schemes could attain only local maxima and the global one. This research article proposes a new intelligent, bio inspired Meerkat optimization algorithm (MOA) which is capabale finding the global power peak and ensured maximum power delivery. ThisMOA MPPT technique is employed for a 120 W PV system and the versatility of the said scheme is tested by subjecting the PV panel for three different partially shaded conditions. The results reveal that the MOA exhibits fast tracking speed of with improved efficiencyof 99.8% when compared with particle swarm optimization (PSO) and differential evolution algorithm (DE)MPPT schemes.
V. Srinivasan; C.S. Boopathi; R. Sridhar. A new meerkat optimization algorithm based maximum power point tracking for partially shaded photovoltaic system. Ain Shams Engineering Journal 2021, 1 .
AMA StyleV. Srinivasan, C.S. Boopathi, R. Sridhar. A new meerkat optimization algorithm based maximum power point tracking for partially shaded photovoltaic system. Ain Shams Engineering Journal. 2021; ():1.
Chicago/Turabian StyleV. Srinivasan; C.S. Boopathi; R. Sridhar. 2021. "A new meerkat optimization algorithm based maximum power point tracking for partially shaded photovoltaic system." Ain Shams Engineering Journal , no. : 1.
The existing solutions for reducing total harmonic distortion (THD) using different control algorithms in shunt active power filters (SAPFs) are complex. This work proposes a split source inverter (SSI)-based SAPF for improving the power quality in a nonlinear load system. The advantage of the SSI topology is that it is of a single stage boost inverter with an inductor and capacitor where the conventional two stages with an intermediate DC-DC conversion stage is discarded. This research proposes inventive control schemes for SAPF having two control loops; the outer control loop regulates the DC link voltage whereas the inner current loop shapes the source current profile. The control mechanism implemented here is an effective, less complex, indirect scheme compared to the existing time domain control algorithms. Here, an intelligent fuzzy logic control regulates the DC link voltage which facilitates reference current generation for the current control scheme. The simulation of the said system was carried out in a MATLAB/Simulink environment. The simulations were carried out for different load conditions (RL and RC) using a fuzzy logic controller (FLC) and PI controllers in the outer loop (voltage control) and hysteresis current controller (HCC) and sinusoidal pulse width modulation (SPWM) in the inner loop (current control). The simulation results were extracted for dynamic load conditions and the results demonstrated that the THD can be reduced to 0.76% using a combination of SPWM and FLC. Therefore, the proposed system proved to be effective and viable for reducing THD. This system would be highly applicable for renewable energy power generation such as Photovoltaic (PV) and Fuel cell (FC).
Poornima Panati; Sridhar Ramasamy; Mominul Ahsan; Julfikar Haider; Eduardo Rodrigues. Indirect Effective Controlled Split Source Inverter-Based Parallel Active Power Filter for Enhancing Power Quality. Electronics 2021, 10, 892 .
AMA StylePoornima Panati, Sridhar Ramasamy, Mominul Ahsan, Julfikar Haider, Eduardo Rodrigues. Indirect Effective Controlled Split Source Inverter-Based Parallel Active Power Filter for Enhancing Power Quality. Electronics. 2021; 10 (8):892.
Chicago/Turabian StylePoornima Panati; Sridhar Ramasamy; Mominul Ahsan; Julfikar Haider; Eduardo Rodrigues. 2021. "Indirect Effective Controlled Split Source Inverter-Based Parallel Active Power Filter for Enhancing Power Quality." Electronics 10, no. 8: 892.
Photovoltaic (PV) systems exhibit non-linear output power voltage (P-V) characteristics for varying input irradiation and temperature. Due to this, the Maximum Power Point Tracker (MPPT), a widely used optimization technique is indispensable in PV power systems. This non-linearity gets more complicated when PV panels experience partial shading in an array. During partial shading, the panels receive non-uniform irradiance and, due to this the current-voltage (I-V) curve is multimodal and so are P-V curves. Therefore, PV array which is partially shaded will exhibit multiple power peaks which are termed global maxima and local maxima. The most prevalent algorithms like Perturb and Observe (P&O) and Incremental Conductance (INC) experiences a unique issue by getting stuck at local maxima and not grasping the global power peak. This research article proposes a new Grasshopper Optimization Algorithm (GOA) which is capable of extracting maximum power even during terrible shading conditions. This algorithm is validated by comparing its performance with both conventional and other most prominent global search counterparts. The results demonstrate the effectiveness of the proposed algorithm.
R. Sridhar; C. Subramani; Somashree Pathy. A grasshopper optimization algorithm aided maximum power point tracking for partially shaded photovoltaic systems. Computers & Electrical Engineering 2021, 92, 107124 .
AMA StyleR. Sridhar, C. Subramani, Somashree Pathy. A grasshopper optimization algorithm aided maximum power point tracking for partially shaded photovoltaic systems. Computers & Electrical Engineering. 2021; 92 ():107124.
Chicago/Turabian StyleR. Sridhar; C. Subramani; Somashree Pathy. 2021. "A grasshopper optimization algorithm aided maximum power point tracking for partially shaded photovoltaic systems." Computers & Electrical Engineering 92, no. : 107124.
This paper begins with a comprehensive review into the existing GaN device models. Secondly, it identifies the need for a more accurate GaN switching model. A simple practical process based on radio frequency techniques using vector network analyser is introduced in this paper as an original contribution. It was applied to extract the impedances of the GaN device to develop an efficient behavioural model. The switching behaviour of the model was validated using both simulation and real time double pulse test experiments at 500 V, 15 A conditions. The proposed model is much easier for power designers to handle, without the need for knowledge about the physics or geometry of the device. The proposed model for Transphorm GaN HEMT was found to be 95.2% more accurate when compared to the existing LT-spice manufacturer model. This work additionally highlights the need to adopt established RF techniques into power electronics to reduce the learning curve while dealing with these novel high-speed switching devices.
Nikita Hari; Sridhar Ramasamy; Mominul Ahsan; Julfikar Haider; Eduardo M. G. Rodrigues. An RF Approach to Modelling Gallium Nitride Power Devices Using Parasitic Extraction. Electronics 2020, 9, 2007 .
AMA StyleNikita Hari, Sridhar Ramasamy, Mominul Ahsan, Julfikar Haider, Eduardo M. G. Rodrigues. An RF Approach to Modelling Gallium Nitride Power Devices Using Parasitic Extraction. Electronics. 2020; 9 (12):2007.
Chicago/Turabian StyleNikita Hari; Sridhar Ramasamy; Mominul Ahsan; Julfikar Haider; Eduardo M. G. Rodrigues. 2020. "An RF Approach to Modelling Gallium Nitride Power Devices Using Parasitic Extraction." Electronics 9, no. 12: 2007.