This paper proposes and validates models to accurately represent STATic Synchronous Shunt COMpensators (STATCOM) in voltage and angle stability studies of powers systems. The proposed STATCOM stability models are justified based on the basic operational characteristics of this Flexible AC Transmission System (FACTS) controller for both phase and PWM control strategies. These models are first va...

Abstract: – In this paper a new rotor field orientation control of six phase induction machine is proposed. The machine has two three phase windings spatially shifted by 30 electrical degrees. The dynamic model of the machine is based on the three two dimensional orthogonal subspaces. The proposed method uses a simple estimator for identifying rotor flux and its orientation. To eliminate the ex...

To improve the energy efficiency and the transmission performance of a sensor network MAC protocol under time varying traffic conditions, recent researches have adopted a variable duty cycle operation that makes each node dynamically adjust its own wakeup and sleep schedule according to a predefined trigger condition. However, most of the existing protocols still waste energy on a long preamble...

These experiments were designed to give the dynamic electrolysis conditions of fluidized beds by the use of small palladium particles. Both direct current electrolysis and pulse power electrolysis methods were used in this study. The excess power observed was 90 mW for direct current electrolysis in D2O + 0.1 M LiOD (I=0.300 to 0.400 A). For pulse electrolysis (pulse width 1.0 μs, pulse frequen...

We present a silicon model of an axon which shows promise as a building block for pulse-based neural computations involving correlations of pulses across both space and time. The circuit shares a number of features with its biological counterpart including an excitation threshold, a brief refractory period after pulse completion, pulse amplitude restoration, and pulse width restoration. We prov...

This Master of Science thesis was written based on the shipbuilder Kockums AB feasibility study regarding the development of an AllElectric Ship for the Swedish Navy. The thesis was aiming at addressing voltage stability issues in a dc system fed by PWM rectifiers operating in parallel when supplying constant power loads. A basic computer model was developed for investigating the influence from...

In this thesis a quadrotor is studied and a linear model is derived using grey-box estimation, a discipline in system identification where a model structure based on physical relations is used and the parameters are estimated using input-output measurements. From imu measurements and measured pwm signals to the four motors, a direct approach using the prediction-error method is applied. To inve...