This review paper discusses power quality considerations for direct current (DC) electric power distribution systems, particularly DC microgrids. First, four selected sample DC architectures are discussed to provide motivation for the consideration of power quality in DC systems. Second, a brief overview of power quality challenges in conventional alternating current (AC) distribution systems i...

Model-Free Optimal Control of Distributed Energy Resources in Electric Power Distribution Systems by Daniel B. Arnold Doctor of Philosophy in Engineering Mechanical Engineering University of California, Berkeley Professor David Auslander, Chair Distributed Energy Resources (DER) have the potential to both improve the manner in which the electric power distribution system is operated and provide...

Electro-magneto-thermo-elastic response of a thick double-layered cylinder made from a homogeneous interlayer and a functionally graded piezoelectric material (FGPM) outer layer is investigated. Material properties of the FGPM layer vary along radius based on the power law distribution. The vessel is subjected to an internal pressure, an induced electric potential, a uniform magnetic field and ...

This paper develops a two-stage stochastic program and solution procedure to optimize the selection of seismic retrofit strategies to increase the resilience of electric power systems to earthquake hazards. The model explicitly considers the range of earthquake events that are possible and, for each, an approximation to the distribution of damage that is experienced. This is important because e...

The discussion about substitute fossil driven vehicles by electros has opened questions from a system operation point of view. The focuses are distribution networks due to the expected impact electric vehicles have. The main problem will be load capacity of cables, transmission lines and transformers. Enhancing the grid is critical due to public acceptance and building costs. This Paper deals o...

Abstract: The rollout of electric vehicles substantially changes the requirements for current power grid infrastructures. The high power demand of fast recharge stations in combination with a high risk of simultaneity leads to the necessity of extended ICT integration into the energy distribution process. This paper describes ongoing research on a simulation framework for modeling the communica...

This paper aims to find the efficient state of hybrid electric vehicle (HEV) by simultaneous optimization of the control strategy and the power train. The power transmission employed in this vehicle is a power-split continuously variable transmission (CVT) which uses several fixed ratio mechanisms. After describing this transmission, the rules of electric assist control strategy are introduced....

The modern electric power grid is a complex interconnected network of independent physical and electronic devices that utilize myriad technologies for communication between other devices and with centralized control centers. These technologies may be compromised by malicious parties which may, in turn, lead to degraded performance or a failure of the communications infrastructure, ultimately re...