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An Alternative Distributed Control Architecture for Improvement in the Transient Response of DC Microgrids

30 April, 2017

Distributed secondary control plays an important role in dc microgrids, since it ensures system control objectives, which are power sharing and dc-bus voltage stability. Previous studies have suggested using a control architecture that utilizes a parallel secondary bus voltage and current sharing compensation. However, the parallel controllers have a mutual impact on each other, which degrades the transient performance of the system.

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Impulsive quasi-synchronization of delayed dynamic networks with asymmetric connections

30 April, 2017

Quasi-synchronization of heterogenous dynamic networks is studied by using impulsive control in this paper. The asymmetric network connections are considered. First, the weighted average state is introduced as the virtual leader. By defining the synchronization error between the virtual leader and the network node, impulsive quasi-synchronization is analyzed and a criterion is derived to ensure quasi-synchronization in the delayed heterogenous network. Then delayed networks with symmetric connections and delay-free networks are studied, respectively, with simpler conditions obtained. Numerical simulations demonstrate the effectiveness of the derived results.

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Performances improvement of Haptic device in bilateral control using aaKF and RFOB

30 April, 2017

Haptic devices are now being deployed in several applications. One of the most interesting is the bilateral telerobotics, as such devices can provide a vivid tactile and/or proprioceptive rendering of the remote environment. In order to make this type of devices more affordable, low cost technology is going to be used, with a possible reduction in performance, due to the loss of backdriveability, especially when sensorless force control is implemented. The use of Reaction Force Observers (RFOB) can ameliorate the overall performance, but such solution achieves a good performance only when an accurate model of the electromechenical system is available.

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Resilient Distributed Energy Management Subject to Unexpected Misbehaving Generation Units

30 April, 2017

Distributed energy management algorithms are being developed for the smart grid to efficiently and economically allocate electric power among connected distributed generation units and loads. The use of such algorithms provides flexibility, robustness, and scalability, while it also increases the vulnerability of smart grid to unexpected faults and adversaries. The potential consequences of compromising the power system can be devastating to public safety and economy. Thus, it is important to maintain the acceptable performance of distributed energy management algorithms in a smart grid environment under malicious cyber-attacks.

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Lumped Track Layout Design for Dynamic Wireless Charging of Electric Vehicles

31 March, 2017

Dynamic wireless charging (DWC) of electric vehicles (EVs) is an emerging technology that could lead to the breakthrough of EVs. The technology is based on the inductive coupling between an electrified track deployed under the road surface and a pickup coil fitted in EV. This paper refers to a lumped track made of DD coils and is concerned with the design of the track layout, namely coil dimension in the motion direction and track coil distance for a given energy requirement.

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