Compensation performance of smart charger with constant dc-capacitor voltage-control-based strategy for electric vehicles in single-phase three-wire distribution feeders under distorted source voltage conditions

摘要

This paper addresses compensation performance of the constant dc-capacitor voltage-control (CDCVC)-based strategy for smart charger with the previously proposed reactive power control algorithm in single-phase three-wire distribution feeders (SPTWDFs) under distorted source voltage conditions. The instantaneous power flows into the smart charger is discussed in detail. This instantaneous power flowing into the smart charger shows that the CDCVC-based strategy with the previously proposed reactive power control algorithm achieves balanced and sinusoidal source currents with a power factor of 0.9, which is a predefined value, are achieved. Thus, the previously proposed reactive power control algorithm with the CDCVC is applicable under distorted source voltage conditions. A computer simulation is implemented to confirm the validity and practicability of the previously proposed reactive power control algorithm with the CDCVC under distorted source voltage conditions. Simulation results demonstrate that sinusoidal and balanced source currents with a power factor of 0.9, which is a predefined and acceptable value by Japanese regulations, are achieved in SPTWDFs under the distorted source voltage conditions.