A Pulsed Power System is characterized by its energy storage system, the energy can be released in the form of a high power pulse to the load, by means of a switching device. The energy storage is usually either of an inductive or a capacitive nature. The limiting device in a Pulsed Power System is often the switch, which limits the pulse peak power and the repetition rate. The conventional app...

A bidirectional isolated full-bridge dc–dc converter with a conversion ratio around nine times, soft startup, and soft-switching features for battery charging/discharging is proposed in this paper. The converter is equipped with an active flyback and two passive capacitor diode snubbers, which can reduce voltage and current spikes and reduce voltage and current stresses, while it can achieve ne...

A 1.2V 6mW 500MS/s 5-bit ADC for use in a UWB receiver has been fabricated in a pure digital 65nm CMOS technology. The ADC uses a 6-channel time-interleaved successive approximation register architecture. Each of the channels has a split capacitor array to reduce switching energy and sensitivity to digital timing skew. A variable delay line is used to optimize the instant of latch strobing to r...

We describe a programmable capacitor technology under development at NCSU and its potential application in building programmable interconnect devices useful for system level connectivity functions, phased array beam steering, and RF switching. Crossbars are made from arrays of electrostatically controlled bistable MEMS-based capacitors. These new devices allow faster signaling and consume less ...

− This paper presents the power quality research work on the distribution system of the University of Queensland, St. Lucia campus. The Alternate Transients Program (ATP) was used in modelling the distribution system components and simulating the processes of harmonic distortion, capacitor switching, voltagesag caused by system faults and large motor starting. The simulation results were analys...

A new soft-switching technique that improves performance of the high-power-factor boost rectifier by reducing switching losses is introduced. The losses are reduced by an active snubber which consists of an inductor, capacitor, rectifier, and an auxiliary switch. Since the boost switch turns off with zero current, this technique is well suited for implementations with insulated-gate bipolar tra...

Long term time dependent transients in l/f noise have been observed and are reported on NMOS transistors operating with switched gate bias. The results are interpreted as a modification of the time dependence of random telegraph signals. The results have important implications in the understanding of the nature of l/f noise and in the understanding the effect of l/f noise in switched capacitor ...

A recently developed Lyapunov (energy) function incorporates both generator and load dynamics. This paper reviews that energy function. Its use in the assessment of the stability of power systems where generator and load dynamics are active is presented. Further, generator/load interaction is explored. This new energy function allows for direct assessment of (dynamic) voltage collapse scenarios...

Abstract This paper presents a set of new convex quadratic relaxations for nonlinear and mixed-integer nonlinear programs arising in power systems. The considered models are motivated by hybrid discrete/continuous applications where existing approximations do not provide optimality guarantees. The new relaxations offer computational efficiency along with minimal optimality gaps, providing an in...