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Energy management system (EMS) using renewable energy such as sunlight is expected to build a low-carbon society. In this paper, we report the modeling of EMS components using SPICE (simulation program with integrated circuit emphasis) and the estimation of the energy self-sufficiency rate by EMS simulation. We develop the simulation models of photovoltaic (PV) power generation system, storage battery...
In order to analyze the dynamic behavior of a Lithium-ion (Li-ion) battery and to determine their suitability for various applications, battery models are needed. An equivalent electrical circuit model is the most common way of representing the behavior of a Li-ion battery. There are different circuit models proposed and various techniques for parameterization of these models available in literature...
Energy storages are indispensable in regard to the development of the smart grid with increasing fluctuating power generation. A valid choice of energy storages is important to ensure the efficiency of the system and selected application. This study describes an initial approach to model energy storage systems as an equivalent circuit. This model is capable of analyzing different load scenarios and...
The majority of work carried out around battery models is partly motivated by vehicle simulation. Specifically for electric vehicle simulation, some characteristics of the battery require more attention while others can be simplified, thus distinguishing dynamic models for battery system simulation slightly and requiring different tools. In this paper, we propose a dynamic battery model that accounts...
The strength of the li-ion electrochemical model is able to describe the internal concentration, spatial potential, and over-potential etc. In this paper, the simplified electrochemical model is proposed and compared with the traditional equivalent circuit model, and their parametric relationship has been established. To make the simplified electrochemical more robust, three electrochemical parameters...
This paper describes a graphical user interface (GUI) tool designed to support cell design and development of manufacturing processes for an automotive battery application. The GUI is built using the MATLAB environment and is able to load and analyze raw test data as its input. After data processing, a cell model is fitted to the experimental data using system identification techniques. The cell model's...
Carsharing has the potential to reduce the total number of cars on the road, with significant benefits to the society and the environment, while at the same time relevant studies show that university communities are often more receptive to alternative transportation services compared to the general population. With the growing interest in electromobility, as a means of decarbonizing the transportation...
Assessing and optimizing the functionality of the various microelectronic components of the powertrain of battery propelled vehicles, is a crucial pre-request to further develop and make sure the electronics could fit well in practical applications. For this purpose, dedicated modeling, simulation and analysis methods have been developed. First parameterizable multi-disciplinary system models, covering...
This paper describes a study demonstrating a new method of state-of-charge (SoC) estimation for batteries in real-world electric vehicle applications. This method combines realtime model identification with an adaptive neuro-fuzzy inference system (ANFIS). In the study, investigations were carried down on a small-scale battery pack. An equivalent circuit network model of the pack was developed and...
This paper proposes a cell-balancing circuit for a series-connected battery string. The proposed cell equalizer is an active cell-balancing circuit with a multi-winding transformer based on a forward DC-DC converter. The advantage of the proposed cell balancing circuit is that it can use less number of active power switches than other forward converter circuits. The proposed circuit operates for all...
Energy balance between electrical power demand and supply should be always under control for a safe mission. It varies with many factors. Simulation is an important study to consider these factors and to perform a reliable analysis of power subsystem. TUGES (TUSAŞ Uydu Güç ve Enerji Simülatörü) is a tool which is developed by TAI, based on MATLAB/Simulink software. It has been developed to have a...
The importance of energy storage technologies is being recognised by more and more power system professionals lately. If properly designed, installed and operated, storage can provide flexibility, and be a valuable component of future electricity networks. Although regulatory and market conditions still have to be improved, the potential of energy storage is unequivocal. As power companies are seeking...
In this work, the operation of a standalone streetlamp PV system is modeled considering actual outdoor operation conditions. The model integrates all components required in a stand-alone PV system: PV panel, battery, charge controller and load. Electrical characteristics of each component are based on those of a streetlamp PV system, currently tested in Singapore. Using measured irradiance data, the...
Series connections of the cells of energy-storage devices such as electric double-layer capacitor (EDLC) and lithium-ion battery result in voltage imbalance in each cell because of the nonuniform properties of the individual cells. In previous work, the authors proposed a novel cell voltage equalization circuit using an LC series circuit. In the proposed circuit, the differences of the convergence...
Upon the increasing implementation of direct current (DC) power sources, energy storages and loads in power systems, DC microgrids have drawn more attention from global stakeholders. Reliable operation of DC microgrids mainly depends on proper control method to cope with bus voltage variations due to renewable sources intermittency and load changes. The main objectives of the control method are to...
Overheat of the Lithium-ion battery during the charge process lead to decrease in capacity of the battery, cycle life, and charge efficiency. Safe and reliable charging methods require control of the battery temperature. In this paper, a min-max charging strategy based on a nonlinear equivalent circuit-Thermal model a Lithium-ion battery is proposed. The min-max optimal problem of specifying the optimal...
This paper presents a simulation study dealing with the influence of different factors on the energy consumption of an electric vehicle (EV). Due to the limited quantity of energy embedded in the battery, EVs are very sensitive to parameters which can influence their energy consumption and then can induce huge variations in their actual range. Among all these factors, driving conditions, auxiliaries'...
The aim of this paper is firstly to describe the design than to introduce a new approach of dynamic modeling and simulation results of a Fuel cell/Ultra capacitor (FC/ULC) hybrid power system. The developed model is represented in the state space, so it can be used to implement a suitable control strategy. The given design shows that the transient behavior, effect of the Fuel Cell, is eliminated by...
The battery is one of the most important components in electric vehicles. In this paper, a virtual battery model, which provides a framework of battery simulation for electric vehicles, is introduced. Using such a framework, we can model and simulate the performance of a battery during its usage, such as battery charge, discharge, and idle status, the impacts of internal and external temperature,...
In a smart energy system, power converters should be controlled by complex control software. However the efficient development of reliable control software is difficult. We have proposed to introduce a “model-based design” process using MATLAB/Simulink, established in the automotive and aerospace fields, to the development of power electronics systems. However, it was difficult in the past because...
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