The electrical performance of Hybrid capacitors (US Patent 5,369,547) using high capacitance density electrochemical capacitor cathodes, electrolytic capacitor anodes and dielectric, and compatible electrolytes is strongly influenced by the nature of the electrolyte employed and the physical characteristics of the electrodes. Management of overall capacitor performance usually involves optimizi...

Abstract For low voltage ride through (LVRT) of the wind power generation system, rotor energy storage and super capacitor are promising options. When cooperates with for LVRT, DC will undulate violently due to speed fluctuation. To solve this problem, a crowbar circuit topology its control strategy including unloading resistance proposed in paper. During process resistor absorb energies togeth...

The use of a super-capacitor as storage device integrated with Voltage source converter-based shunt-connected Static Synchronous Compensator (STATCOM) is proposed for improving the STATCOM performance during sudden large disturbances in power network. was applied across capacitor disturbance condition. MATLAB simulations were carried out verification secondary function like oscillation damping,...

We demonstrate the fabrication of solid-state dielectric energy storage materials from selfassembled, aligned single-walled carbon nanotube arrays (VA-SWNTs). The arrays are transferred as intact structures to a conductive substrate and the nanotubes are conformally coated with a thin metal-oxide dielectric and a conductive counter-electrode layer using atomic layer deposition. Experimental res...

Li-ion hybrid supercapacitors (LIHSs) have recently attracted increasing attention as a new and promising energy storage device. However, it is still a great challenge to construct novel LIHSs with high-performance due to the majority of battery-type anodes retaining the sluggish kinetics of Li-ion storage and most capacitor-type cathodes with low specific capacitance. To solve this problem, 3D...

This paper introduces a merged converter topology for supplying high-brightness light-emitting diodes for lighting applications. The converter combines a boost-based power factor correction rectifier (PFC) and a resonant converter in a single-stage. In this topology both converters share the same switching components and a bulky electrolytic capacitor, existing in conventional systems, is repla...

How Big is a one -Farad capacitor? Would you believe less than a cubic inch? Conventional wisdom and poorly done cartoons notwithstanding, a new capacitor technology is now available that crams incredible capacitance values into very small volumes. As Fig. 1 shows, these are called double -layer capacitors. They are both reasonably priced and available from distributor stock. For instance, a 1....

Battery management systems (BMS) are a key element in electric vehicle energy storage systems. The BMS performs several functions concerning to the battery system, its key task being balancing the battery cells. Battery cell unbalancing hampers electric vehicles’ performance, with differing individual cell voltages decreasing the battery pack capacity and cell lifetime, leading to the eventual ...

To restore the load voltage, Dynamic Voltage Restorer (DVR), which is installed between the supply and a sensitive load, should inject voltage and active power from DVR to the distribution system during voltage sag. Due to the limit of energy storage capacity of DC link, it is necessary the minimize energy injection from DVR. In this paper the techniques of the supply voltage sag compensation i...

An analog VLSI architecture for learning vector quantization (LVQ), with on-chip adaptation and dynamic storage of the analog templates, is presented. The architecture extends to Fuzzy ART and Kohonen self-organizing maps through digital programming. The analog memory and adaptive element of the LVQ cell comprise 6 MOS transistors and one capacitor, and provide for robust selfrefresh of the dyn...