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This paper presents an estimation procedure of equivalent electric circuit parameters of a lithium-ion cell using data from a pulse charge/discharge test. An extraction process of the model parameters is based on a transient voltage response of relaxation process following a current pulse. The entire procedure is straightforward and there is no restriction in a number of parallel RC-branches in the...
Dynamic manipulation of magnetization state (MS) in variable flux permanent magnet synchronous machines (VF-PMSMs) during normal operation based on the torque-speed operating conditions has been shown to significantly reduce machine losses over urban driving cycles. However, the additional losses that are induced during the dynamic MS manipulation have not been evaluated. This paper presents a combination...
This paper presents the simulation of different types of single as well as composite power quality events (PQ) for analysis and characterization. Most of the power quality problems (the transient and steady state disturbances), which can occur in the distribution system, have been obtained. Six single PQ event such as voltage sag, voltage swell, interruption, transients, voltage notch and harmonics...
Very Fast Transient overvoltages (VFTO) in power systems are result of switching operations such as disconnector opening and closing inside GIS substation. The VFTO causes great threat to the insulation of the high-voltage equipment (e.g. bushings or windings of transformers). These transients are associated with very short rise times in the nanoseconds range, and are normally followed by oscillations...
This paper presents an overview of the modelling and simulation activities conducted in support of the operation of the engine systems validation rig (ESVR) demonstrator that is being developed as part of the power optimised aircraft (POA) project. The application of the more-electric concept to a civil aircraft engine as part of this project is described, outlining the expected benefits and anticipated...
This paper presents a dynamic simulation model using Matlab/Simulink software to study the behavior of renewable energy systems with hydrogen storage (RESHS). The complete system model is developed by integrating individual sub-units of the photovoltaic arrays, wind turbine, batteries, electrolyzer, fuel cell and power conditioning units. The sub-models are valid for transient and steady state analysis...
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