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Misalignment during wireless charging of EVs can lead to low efficiencies (<85%) of power transfer which can lead to thermal issues and high leakage fields. This paper explores the most optimal solution towards a misalignment tolerant system. To that end, a DD-DDQ coil system with series-series compensation combined with an impedance matching control algorithm is explored. A multi-objective optimization...
An integrated design approach for the reactors used in multi-terminal HVdc (MTdc) grids based on the Modular Multilevel Voltage Source converters (MMC-VSC) technology is proposed in this paper. Arm reactors and dc limiting reactors are used to limit the rate of rise of currents in case of dc faults to protect the converter valves and allow more time for the dc breakers to isolate the faulty line within...
There is a growing interest in the development of high-voltage multi-terminal direct current (MTDC) networks for integration of renewable energy sources, reinforcement of existing ac networks and feeding remote locations. Although many studies have investigated power flow control strategies for MTDC networks, few studies have looked into the possible sources of load flow errors. The aim of this paper...
An in-road distributed Inductive Power Transfer system can be coupled to an EV to increase range, while a minimized battery capacity is used. The system dynamically charges the On-line EV. The vehicle mass will be reduced due to the smaller battery, resulting in lower energy consumption and improved driving dynamics. In this paper the IPT power and ‘coverage’ parameters are evaluated for their impact...
Increasing environmental issues require high efforts in the development of human capital in the area of alternative technologies including electric vehicles. In this paper two courses on electrical vehicles are presented.
Distance laboratories using internet have been becoming increasingly popular tools in the education sector. This paper deals with basic philosophy and structure of a distance laboratory for experimentation in electrical engineering. It investigates the learning methodology of conducting experiments through internet based remote controlled laboratory for electrical characteristics measurement and Maximum...
Estimates are that circa 40GW of offshore wind power capacity is going to be installed throughout Europe by the end of this decade. In this scenario, a pan-European offshore grid network is needed in order to efficiently integrate large amounts of offshore wind into the different European countries' transmission networks. In this paper, the dynamic model of multi-terminal HVDC (MTDC) transmission...
To simulate electric vehicles, appropriate battery models are required. In this work a model of the battery and a methodology for determining the parameters of a battery model using the catalog data of the batteries and Multiobjective Optimization is proposed. The technique is applied to different battery types and the results are presented.
This paper deals with simulation and experimental verification of DC/DC converter with input active filter. Input filter design is presented and in analysis two different stabilization methods are studied. Offset method is based on stabilization of undesired current values on input choke and it is based on total change of converter switching (unplugging from the power network). Stabilization method...
The paper characterizes the properties of discrete time minimax tracking control problem in the case of time varying references and disturbances. Hereunder, a multi step tracking control synthesis is suggested for linear time invariant (LTI) plants when the reference signal could be time dependent. Moreover, instead of directly rejecting the effect of the (time varying) disturbance signal, an intermediate...
To increase the clean and renewable energy used presently, energy could be extracted from the sea. Here an Archimedes wave swing (AWS) park is proposed to convert the motion of the sea waves into electricity with a capacity of 90 MW. In order to find the most suitable way to connect these devices, various electrical components are used which need to be modeled precisely to carry out the calculations...
The efficiency of a diesel generator is dependent on the ratio determined by the average power divided by the peak power of the generator. The smaller this ratio, the lower the efficiency. Furthermore some loads can regenerate energy. In small grids this energy is mostly not needed elsewhere and should be dissipated. A solution solving both above mentioned problems is using an energy storage device...
Diesel generators in small electricity grids are mostly not used in a very efficient way. The reason for this is twofold. First of all the efficiency of a diesel generator is dependent on the ratio between the average power and the peak power of the generator. The smaller this ratio, the lower the efficiency. Furthermore some loads can regenerate energy. In small grids this energy is mostly not needed...
This paper brings some practical results of research devoted to the new generation of mobile electrical power sources, based on the VSCF technology (variable speed-constant frequency). In this generation of mobile electrical power sources the driving motor and generator speed is optimally controlled in accordance with the load power thus decreasing the fuel consumption. The output voltage and frequency...
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