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U

      Ustands for upperUSAUnited States of AmericaUGunity gain

V

Vvoltage, unit of voltage, voltphasor output voltageVDDpositive DC supply voltage of operational amplifierVSSnegative DC supply voltage of operational amplifierphasor source 1 input voltagephasor source 2 input voltage Vharmonicharmonic voltage magnitudeV pprimary phase voltage of transformerV ssecondary phase voltage of transformerV1primary phase voltage of transformerV2secondary phase voltage of transformerVCAmagnitude of primary voltage between winding terminals A and AVAnpmagnitude of primary voltage between terminal A and neutral point np of primary winding AVansmagnitude of secondary voltage between terminal a and neutral point ns of secondary winding aphasor voltage across primary winding 1phasor voltage across secondary winding 2phasor voltage across capacitor Cprimary phasor voltagev+positive input voltage of operational amplifierv−negative input voltage of operational amplifiermagnitude of phasor voltage at primary side of transformerphasor output voltage of secondary circuitphasor load secondary voltage of single‐phase transformer referred to primary sidephasor secondary voltage of transformer referred to primary sidemagnitude of the load phasor voltage of transformer referred to primary sidephasor voltage across the primary resistance Rpphasor voltage across the primary leakage reactance Xlpphasor voltage drop across leakage reactance of secondary side referred to primary side of transformerphasor voltage drop across winding resistance of secondary side referred to primary side of transformerphasor voltage of sourcephasor source voltage as a function of angular velocity or frequency ωphasor output voltage as a function of angular velocity or frequency ωphasor load/secondary voltage of single‐phase transformer where superscript (1) indicates the first step of drawing the phasor diagram phasor primary voltage of single‐phase transformer where superscript (15) indicates the fifteenth step of drawing the phasor diagramv(t)voltage as a function of time functionv1(t)primary voltage as a function of time functionvp(t)primary voltage as a function of time functionphasor of voltage time function v(t)VAunit for apparent power S called volt‐amperevoltage across primary winding of phase Avoltage across primary winding of phase Bvoltage across primary winding of phase Cvoltage across primary winding of phase avoltage across primary winding of phase bvoltage across primary winding of phase cmagnitude of primary phase voltage of transformer with winding Amagnitude of primary phase voltage of transformer with winding Bmagnitude of primary phase voltage of transformer with winding Cmagnitude of secondary phase voltage of transformer with winding amagnitude of secondary phase voltage of transformer with winding bmagnitude of secondary phase voltage of transformer with winding cphasor primary phase voltage of transformer with winding Aphasor primary phase voltage of transformer with winding Bphasor primary phase voltage of transformer with winding Cphasor secondary phase voltage of transformer with winding aphasor secondary phase voltage of transformer with winding bphasor secondary phase voltage of transformer with winding cphasor primary line‐to‐line voltage of transformer between windings C and Aphasor primary line‐to‐line voltage of transformer between windings A and Bphasor primary line‐to‐line voltage of transformer between windings B and Cphasor secondary phase voltage of transformer between terminals a and a′phasor secondary phase voltage of transformer between terminals b and b′ phasor secondary phase voltage of transformer between terminals c and c′VAnpmagnitude of primary phase voltage of transformer with winding AVaa′magnitude of secondary phase voltage of transformer between terminals a and a′magnitude of primary phase voltage of transformer between terminals A and A′magnitude of primary phase voltage of transformer between terminals B

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