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CO2 Reduction
In article number 2107799, Wenyu Huang, Sen Zhang, Long Qi, and co‐workers achieve a benchmark study of various single‐atom transition metal catalysts for electrochemical reduction of CO2 to CO. The single‐atom Ni anchored on ordered mesoporous nitrogen assembly carbon catalyst, Ni‐NAC, possesses not only high CO selectivity and current density, but also high durability in a broad potential...
The electrochemical carbon dioxide reduction reaction (CO2RR) is a transformative technology to reduce the carbon footprint of modern society. Single‐site catalysts have been demonstrated as promising catalysts for CO2RR, but general synthetic methods for catalysts with high surface area and tunable single‐site metal composition still need to be developed to unambiguously investigate the structure–activity...
A multiple feedback control system developed for three phase three level neutral point clamped (NPC) pulse width modulation (PWM) voltage source front end converter (FEC) is presented. This technique does not require any load information. A forced switching technique is used to operate the converter at constant frequency. The system is modeled and multiple feedback control system is developed using...
In this paper, the dynamic performance of a grid connected photovoltaic (PV) power system of a distribution networks is studied and experimental results are presented. Due to oscillating nature of the PV power plant, the grid integration requires stable and steady power injection with good power quality (PQ). Hence, the PQ analysis has been carried out under different climate conditions at 10 kW Solar...
In this paper, the modeling and control of the DC sub-grid, fed from Solar panels and integrated into the grid using dual active bridge (DAB) converters, is studied. The dynamic performance of the DAB converter depends on accurate modeling of the system. A small signal (SS) modeling of DAB converter is developed for the closed loop control and its dynamics are studied for different operating conditions...
Distributed grid connected photovoltaic (PV) is playing a significant role as an electric supply resource and as an integral part of grid. However, PV poses some notable challenges when the grid is a weak grid. In this paper, a grid tie inverter is modeled and simulated. The power output of inverter must meet the utility requirements such as power quality, dc current injection, power factor etc. Grid...
A crack in the vibrant structures can lead to premature failure if it is not identified in early stages. The failure rate increases as the crack growth increases due to the structure becomes weaker. Therefore, crack identification and type of crack is a key issue. The existence of cracks which influence the performance of structure as well as the vibration parameters such as; natural frequencies,...
This paper presents the theory and design of coupled resonant systems for wireless power transmission (WPT) system for the next generation electrical power transfer application. A detailed analysis and experimental design of solenoid and spiral coil based wireless power transmitter and receivers are addressed. Experimentally, it is found that the power transfer efficiency reaches the maximum at resonant...
In this paper a three-phase three-level Neutral Point Clamped (NPC) inverter is used for driving Induction Motor (IM) operating under Direct Torque Control (DTC) scheme. The three-level NPC inverter has 27 combinations of switching states. However, there are redundancies in these combinations and only 19 voltage vector are considered in the order to minimize the Common Mode (CM) voltage stress on...
In this paper, a three-level inverter fed induction motor drive operating under Direct Torque Control (DTC) is presented. DTC do not show good performance in low speed region due to stator flux demagnetization that relates to variation in stator resistance. Here, a sinusoidal wave is used as dither signal of minute amplitude (for torque hysteresis band and flux hysteresis band respectively) in the...
In this paper, analytical study on the impact of voltage sag in the internal dynamics of a grid connected Doubly Fed Induction Generator (DFIG) system is presented. A common dc-link of the rotor side converter (RSC) and grid side converter (GSC) supported static compensator (STATCOM) is proposed for the voltage ride through capability. The proposed system is connected to a small transmission network,...
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