Page 9 - Power Quality in Electrical Systems

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Contents

Preface xi

Chapter 1. Introduction 1
Background 1
Ideal Voltage Waveform 2
Nonlinear Load:The Rectifier 3
The Definition of Power Quality 6
Examples of poor power quality 7
The need for corrections 9
The Scope of This Text 9
Comment on References 11
References 12

Chapter 2. Power-Quality Standards 15
IEEE Standards 519 and 1159 15
ANSI Standard C84 17
CBEMA and ITIC Curves 18
High-Frequency EMI Standards 20
Summary 23
References 24
Chapter 3. Voltage Distortion 25
Voltage Sag 25
Voltage “Swell” 30
Impulsive “Transient” 30
Oscillatory “Transient” 33
Interruption 35
Notching 35
Voltage Fluctuations and Flicker 37
Voltage Imbalance 40
Summary 41
References 42

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