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Demand side management (DSM) exploits flexibility of the end-user side to help improve the performance of the power grid. However, how to model and evaluate the multi-dimensional flexibility (MDF) of the energy consumers (such as the flexibilities in terms of energy, power, time period and locations, etc.) is an important and challenging issue. To handle this, we propose a day-ahead market design...
This paper proposes a control strategy for plug-in electric vehicle (PEV) fast charging station (FCS) equipped with a flywheel energy storage system (FESS). The main role of the FESS is not to compromise the predefined charging profile of the PEV battery during the provision of a hysteresis-type active power ancillary service to the overhead power system. In that sense, when the active power is not...
Electrical vehicle (EV) chargers are going to occupy a considerable portion of total energy consumption in the future smart grid. Fast charging stations (FCS), as the most demanding representatives of charging infrastructure, will be requested to provide some ancillary services to the power system in order to support basic electrical operation. This paper proposes a local implementation of a hysteresis-based...
This paper applies a hierarchical control for a fast charging station (FCS) composed of paralleled PWM rectifier and dedicated paralleled multiple flywheel energy storage systems (FESSs), in order to mitigate peak power shock on grid caused by sudden connection of electrical vehicle (EV) chargers. Distributed DC-bus signaling (DBS) and method resistive virtual impedance are employed in the power coordination...
Electrical vehicles (EVs) are presenting increasingly potential to replace the conventional fossil fuel based vehicles due to environmental friendly characteristic. Accordingly, Charging Stations (CS), as an intermediate between grid and large numbers of EVs, are supposed to have more critical influence on future smart transportation network. This paper explores an off-board charging station upgraded...
Fast charging stations (FCS) will become an essential part of future transportation systems with an increasing number of electrical vehicles. However, since these FCS plugs have power ratings of up to 100 kW, serious stress caused by large number of FCS could threaten the stability of the main power grid. To overcome the possible adverse impacts, this paper applies a dedicated paralleled flywheels...
Electric Vehicle (EV) charging stations with battery swapping, as one promising energy supplement solution to cope with the increasing in EVs, demand a theoretical performance analysis framework. In this paper, we propose a queueing network model to serve as such a framework for battery swapping stations with a locally-charging mode. The model is a mixed queueing network with an open queue of EVs...
Electric Vehicle (EV) drivers have an urgent demand for fast battery refueling methods for long distance trip and emergency drive. A well-planned battery swapping station (BSS) network can be a promising solution to offer timely refueling services. However, an inappropriate battery recharging process in the BSS may not only violate the stabilization of the power grid by their large power consumption,...
This paper presents a multimode UMTS/GSM RF transceiver integrated with a digital baseband having advanced multimedia functionalities. The SoC, designed in 65nm digital CMOS, supports quad-band GSM/GPRS/EDGE (3GPP R4, Class12) and tri-band UMTS/WCDMA (3GPP R99, R5 cat 5/6), including band 1-2-4-5-6-8-9-10.
Energy efficiency is a major design goal for resource-constraint Wireless Sensor Networks (WSNs). In this paper, an energy efficient clustering approach is employed to meet this design goal. Moreover, given the fact that most of the existing clustering algorithms do not address the hot spot problem that arises in the vicinity of the base station, an unequal clustering mechanism is implemented among...
A micro flywheel energy storage system was designed in which the flywheel battery saves and releases energy when necessary. Controlling system and four operating modes of solar power system containing flywheel battery were given and operating process of this system was simulated. The results show that: the flywheel battery resolves the problem of incapability of solar power supply at night and delays...
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