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By analyzing the hybrid property of Microgrid in detail, a mixed logical dynamical model is set up with Hybrid theory. The energy in DC bus capacitor is chosen as state variable, the system functions and constraints with continuous state variables, input control variables, logical variables and auxiliary variables are presented. Based on the MLD model, model predictive control theory is applied for...
The use of a bi-directional buck-boost cascade converter in electric vehicles allows the suitable control of both motoring and regenerative braking operations. Based on the bidirectional buck-boost cascade converter, the random pulse width modulation (RPWM) scheme is implemented to reduce the conducted electromagnetic interference (EMI). Compared with the fixed frequency PWM (FPWM), the proposed RPWM...
This paper proposes a hybrid energy source (HES) based double-stator permanent magnet brushless motor drive (DS-PMBL) for hybrid electric vehicles (HEVs). The key is to design and apply a battery-ultracapacitor HES to the DS-PMBL HEV drive properly, incorporating the merits of both battery and ultracapacitor. The peaky charging and discharging currents are supplied or absorbed by the ultracapacitors...
This paper proposes a new hybrid-source switched-capacitor multilevel converter for electric vehicles. The key is to integrate the battery-ultracapacitor hybrid power source into the switched-capacitor multilevel converter. Hence, the problem of high capacitive charging current of the switched-capacitor multilevel converter can be solved, and the dynamic voltage equalization of battery packs can be...
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