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An EV (Electric Vehicle) could play a prominent role in transport sector in terms of cost benefit and environment issues. A battery charger must have high efficiency and dependability with a unity power factor current drawn at its input AC mains since it is directly going to affect the charging time and life of the battery used in EV. Conventional AC-DC converter uses a diode bridge rectifier at the...
Battery energy storage systems mitigate problems associated with source uncertainty inherent in renewable energy systems. Power generation acquire greater reliability when provided with storage systems. Energy management algorithms decide charging/discharging pattern of the storage. Unfitting approximation of losses being neglected in storage and converter systems lead to heavy losses within the system...
In this paper a hybrid algorithm that monitors the voltage at the Point of Common Coupling (PCC) and dispatches the optimal power from battery integrated micro grid is proposed. The proposed architecture integrates a rule based dispatch and a predictive optimization algorithm and ensures optimal power dispatch with minimum voltage variations at the PCC. The methodology and the algorithmic flowchart...
The paper demonstrates phasor and time domain hybrid simulation in real-time. A 55bus distribution grid is simulated in phasor domain and a solar photovoltaic with battery storage and some residential loads are modeled in time domain. This hybrid simulation is achieved using OPAL-RT Technologies real time solution called ePHASORsim for phasor domain and eMEGAsim for the time domain simulation. In...
The development of Electric Vehicles is gaining momentum due to diminishing fuel resources and environmental concerns. In Electric Vehicle, batteries form the primary energy storage. Sometimes available power from battery may not be sufficient to meet peak load demands. So, a secondary storage like ultracapacitor can be used in parallel with battery source to meet the power demand, where in the high...
In this paper, a fourth-order non-isolated bidirectional converter is proposed for load power management in low-voltage DC grid. With state-space and discrete-time modeling technique, the proposed bidirectional converter is modeled, and small-signal transfer functions are obtained. A digital compensator is designed using these transfer functions both for the charger and discharging cases. The converter...
Electric and Hybrid Electric Vehicle technologies are developing rapidly as a solution to energy and environmental issues. EV/HEV power train system integrates a number of electro mechanical systems and an optimum subsystem design is inevitable to arrive at a practical solution in terms of performance and size of the power train components. Component sizing is essential to meet the performance requirements...
Vehicular emissions have major impact on global warming. Many countries have had serious considerations about it and have delved into developing alternative fuel technologies. The most optimistic choice for powering electric vehicles at present and the immediate future is battery electric power. The global automobile manufacturers are investing heavily in research of battery run efficient electric...
The paper describes the estimation of parameters of battery model at various temperatures for the Li-ion battery. The estimation of parameters employs experimental methods that are time-consuming, expensive and require high computational power. Hence, second-order RC network equivalent circuit model parameters estimation is done using GA, PSO, and DE optimization techniques. For proper evaluation,...
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