PERFORMANCE ANALYSIS OF HYBRID ELECTRIC VEHICLE WITH ELECTRIC DOUBLE LAYER CAPACITOR UNDER SHORT CIRCUIT FAULT

Energy management system (EMS) studies are one of the most popular issues in (Hybrid Electric Vehicle) HEV technology and research. However, the fault and failure analysis of HEV is also important regarding to safety and reliability. Because there occurs various types of faults in several vital parts of HEV drive-trains which can have impact on providing a healthy operation and consequently result in a low performance or malfunction in whole system. There are many studies related to vehicle technology regarding the diagnosis and fault detection in HEVs. Nevertheless, only a few of them concern short circuit fault. In this paper, model analysis of HEV under the short circuit fault symptoms is presented to get insight of the fault effect on the HEV performance. Accordingly, high impedance short circuit fault is simulated occurring at DC electric system. Moreover, Electric Double Layer Capacitor (EDLC)-battery power source is proposed in order to suppress short circuit fault effect in the system and to increase the HEV performance since EDLC behaves like a rapid charging/discharging buffer. We utilize a parallel-series type HEV simulation model which is developed in Matlab/Simulink environment including a short circuit fault case. Developed model of EDLC-battery pack hybrid power source is tested in this HEV simulation model and the impact of EDLC on short circuit fault and the whole system performance is analyzed.