EV charging station with cascaded low-pass filtering scheme-based control of unified power quality conditioner

Abstract This paper proposes a cascaded low-pass filter (CLPF) scheme for the control of unified power quality conditioner (UPQC) installed enhancing an electric vehicle (EV) charging station. With incorporation UPQC, EV station draws sinusoidal currents at unity factor and supply voltage is maintained nominal value charger input. In CLPF scheme, α–β components load current are individually processed through cascade connection two LPFs to determine corresponding fundamental orthogonal components. Based on thus determined components, instantaneous peak phase angle positive sequence component (FPSC) computed. Similarly, quantities related voltages also computed with scheme. computations voltage, unit templates (UVTs), active (FAC) calculated. For shunt compensation, reference generated based FAC UVTs. Alternately, series compensation employed help UVTs amplitude FPSC voltage. The performance scheme-based extraction compared that earlier reported schemes simulation experimental studies. comparison reveals faster dynamic more accurate steady-state response proposed analysis UPQC deployed different operating conditions demonstrates operation requisite reactive mitigation sag/swell, prevention propagation harmonic unbalanced into grid. results in increased reliability operation, energy savings efficiency distribution network.