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Master of Science Thesis in Electric Power Engineering - page 6 / 114

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LIST OF SYMBOLS, SUPERSCRIPTS, SUBSCRIPTS AND ABBREVIATIONS

ABBREVIATIONS

DPC IC IGBT IM IMC PWM PLL PMSM SVM VFDPC VFOC VOC

Direct Power Control Initial Condition Insulated Gate Bipolar Transistor Induction Machine Internal Model Control Pulse Width Modulation Phase Locked Loop Permanent Magnet Synchronous Machine Space Vector Modulation Virtual Flux Direct Power Control Virtual Flux Oriented Control Voltage Oriented Control

iL

i

i

CONV

i

DC

i

LOAD

SYMBOL

U E

and Vpcc Us V V*

_

Line voltage Line voltage Grid phase to ground voltage amplitude dq coordinates of line or grid voltage (amplitude invariant transformation) Voltage at the point of common connection Converter voltage Converter voltage Converter voltage reference from current controller Line to Line voltage Line to Neutral voltage Amplitude of Line to Neutral voltage Amplitude of Line to Neutral voltage DC link voltage Voltage across AC side capacitor Line current Line current Line current, current flowing into the converter DC link current Load current Line resistance Line inductance DC link capacitor Grid resistance Grid inductance Breaker SW1 resistance AC capacitor DC capacitor Load resistance Temporary load resistance Voltage angle Sampling frequency Sampling time

vi

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