Abstract
This paper deals with power quality compensation in single-phase three-wire distribution feeders using a constant DC-capacitor voltage-control (CDCVC)-based strategy of the previously proposed bidirectional battery charger (BBC) for electric vehicles under the distorted source-voltage and load-current conditions. Instantaneous active power flowing into the three-leg pulse-width-modulated (PWM) rectifier in the BBC is discussed. The instantaneous power flowing into the three-leg PWM rectifier demonstrates that the CDCVC-based strategy obtains balanced and sinusoidal source currents at a unity power factor, where the source-side active power is balanced with the load-side active power. Simulation and experimental results demonstrate that balanced and sinusoidal source currents at a unity power factor are attained in single-phase three-wire distribution feeders with both battery-charging and -discharging operations for electric vehicles even though both source voltage and load currents are distorted.
Highlights
Electric vehicles (EVs) are nowadays commercially available by several makers worldwide.A large amount of electric power can be stored in lithium-ion batteries of EVs
The instantaneous power flowing into the three-leg PWM rectifier in the bidirectional battery charger (BBC) is discussed under the distorted source-voltage and load-current conditions to demonstrate that the constant DC-capacitor voltage-control (CDCVC)-based strategy in Figure 1 attains the balanced and sinusoidal source currents iS1 and iS2 at a unity power factor
This paper addressed power quality compensation of the previously proposed BBC with a CDCVC-based strategy for EVs in single-phase three-wire distribution feeders under distorted source-voltage and load-current conditions
Summary
Electric vehicles (EVs) are nowadays commercially available by several makers worldwide.A large amount of electric power can be stored in lithium-ion batteries of EVs. A domestic consumer can consume the stored electric energy, where the lithium-ion batteries in an EV perform as a peak shaver; this is called vehicle-to-home (V2H). These interesting concepts were proposed in [1,2,3,4,5,6]. It is well known that the reactive and harmonic currents can be controlled independently of the fundamental active currents on the source side [8]. Reactive power compensation strategy was included in the control circuit of the single-phase two-leg
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