The Experts below are selected from a list of 9174 Experts worldwide ranked by ideXlab platform
Tudor Lipan - One of the best experts on this subject based on the ideXlab platform.
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A dual-active-bridge based bi-directional micro-inverter with integrated short-term Li-Ion ultra-Capacitor Storage and active power smoothing for modular PV systems
Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC, 2014Co-Authors: Shahab Poshtkouhi, Miad Fard, Husam Hussein, Lucas Marcelino Dos Santos, Mihai Varlan, Olivier Trescases, Tudor LipanAbstract:This work targets modular nanogrids for remote locations, where photovoltaic modules can be gradually introduced to grow the renewable energy capacity at minimal capital cost, while reducing diesel fuel consumption. Today's grid-tied micro-inverters provide a modular solution for ac power generation in nanogrids but battery Storage remains centralized, requiring an additional ac-dc converter. The main contribution of this work is a new micro-inverter platform and control scheme with bidirectional power flow between the nanogrid, the photovoltaic module and integrated short-term Storage, using new high energy-density Lithium-Ion Capacitor technology. A real-time power smoothing algorithm is also proposed and the performance of the new 100 W micro-inverter is experimentally verified under various closed-loop dynamic conditions.
D Sutanto - One of the best experts on this subject based on the ideXlab platform.
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a novel control strategy to mitigate slow and fast fluctuations of the voltage profile at common coupling point of rooftop solar pv unit with an integrated hybrid energy Storage system
Journal of energy storage, 2018Co-Authors: Prabha Ariyaratna, Kashem M Muttaqi, D SutantoAbstract:Abstract A high penetration of rooftop solar photo-voltaic (PV) units can cause both slow and fast voltage fluctuations when connected to the low voltage (LV) distribution feeder due to the random variations in the solar PV power output versus load demand. These unacceptable fluctuations can be alleviated by using energy Storage systems integrated with the solar PV units. In this paper, a novel heuristic control strategy is proposed to alleviate both the slow and fast voltage fluctuations in the connected LV distribution feeder; using a hybrid energy Storage system. In the proposed method; the integrated battery Storage will be dynamically charged to mitigate the voltage rise during mid-day, and discharged during the evening peak hours, and the integrated super Capacitor Storage will be simultaneously charged or discharged to control the fast fluctuations in the PV inverter to be within a specified magnitude. An energy sharing method between the battery Storage and the super Capacitor Storage is proposed to provide undisrupted control for the fast fluctuations during passing cloud. The proposed control strategies have been verified on a distribution feeder system and the results have been reported.
Diego Iannuzzi - One of the best experts on this subject based on the ideXlab platform.
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Improvement of energy efficiency in light railway vehicles based on power management control of wayside lithium-ion Capacitor Storage
IEEE Transactions on Power Electronics, 2014Co-Authors: Flavio Ciccarelli, Andrea Del Pizzo, Diego IannuzziAbstract:The paper suggests an energy management control strategy of wayside Li-ion Capacitor (LiC) based energy Storage for light railway vehicles (LRV). The installation of wayside superCapacitor (SC) Storage devices, as widely recognized, allows the recovery of the braking energy for increasing the system efficiency as well as a better pantograph voltage profile. A new type of SC, LiC, interfaced with dc-interleaved converter has been presented. This technology has an energy density comparable to batteries and power density much higher than the batteries. The authors propose a control strategy based on the maximum kinetic energy recovery throughout braking operations of the running vehicles. The stored energy comes back to the vehicles during the accelerations. The strategy stays on the knowledge of the state of charge of LiC device and the actual vehicle speeds. In particular, the control algorithm evaluates, in real time, the actual value of LiC voltage and current references on the basis of the vehicles inertial forces and acceleration estimations, taking into account the power losses of the system. Experimental tests made on electromechanical simulator, equipped with a 136-V, 30.5-F LiC module, fully confirm the validity of the suggested control. Finally, experimental characterization of LiC module has been achieved.
Xiaopeng Hao - One of the best experts on this subject based on the ideXlab platform.
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transition metal oxynitride a facile strategy for improving electrochemical Capacitor Storage
Advanced Materials, 2019Co-Authors: Shouzhi Wang, Yongliang Shao, Lei Zhang, Xiaopeng HaoAbstract:The use of transition-metal oxide (TMO) as an extended-life electrochemical energy Storage material remains challenging because TMO undergoes volume expansion during energy Storage. In this work, a transition-metal oxynitride layer (TMON, M: Fe, Co, Ni, and V) was synthesized on TMO nanowires to address the crucial issue of volume expansion. The unique oxynitride layer possesses numerous active sites, excellent conductivity, and outstanding stability. These characteristics enhance specific capacitance and alleviate volume expansion effectively. Specifically, the specific capacity of the TMON electrode is enhanced by approximately twofold relative to that of its corresponding oxide. Notably, the capacitance of the TMON remains above 94% even after 10 000 cycles. This result indicates that the cycling performance of the TMON electrode is superior to that of its corresponding oxide. First-principles and quantitative kinetics analyses are performed to investigate the mechanism underlying the improved electrochemical performances of the TMON layers. Results demonstrate that the proposed TMON layer has attractive applications in the fields of energy Storage, conversion, and beyond.
Shahab Poshtkouhi - One of the best experts on this subject based on the ideXlab platform.
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A dual-active-bridge based bi-directional micro-inverter with integrated short-term Li-Ion ultra-Capacitor Storage and active power smoothing for modular PV systems
Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC, 2014Co-Authors: Shahab Poshtkouhi, Miad Fard, Husam Hussein, Lucas Marcelino Dos Santos, Mihai Varlan, Olivier Trescases, Tudor LipanAbstract:This work targets modular nanogrids for remote locations, where photovoltaic modules can be gradually introduced to grow the renewable energy capacity at minimal capital cost, while reducing diesel fuel consumption. Today's grid-tied micro-inverters provide a modular solution for ac power generation in nanogrids but battery Storage remains centralized, requiring an additional ac-dc converter. The main contribution of this work is a new micro-inverter platform and control scheme with bidirectional power flow between the nanogrid, the photovoltaic module and integrated short-term Storage, using new high energy-density Lithium-Ion Capacitor technology. A real-time power smoothing algorithm is also proposed and the performance of the new 100 W micro-inverter is experimentally verified under various closed-loop dynamic conditions.
