1.1 Introduction1.2 Basics of Harmonic Theory1.3 Linear and Nonlinear Loads1.3.1 Linear Loads1.3.2 Nonlinear Loads1.4 Fourier Series1.4.1 Orthogonal Functions1.4.2 Fourier Coefficients1.4.3 Even Functions1.4.4 Odd Functions1.4.5 Effect of Waveform Symmetry1.4.6 Examples of Calculation of Harmonics Using Fourier Series1.4.6.1 Example 11.4.6.2 Example 21.5 Power Quality Indices under Harmonic Distortion1.5.1 Total Harmonic Distortion1.5.2 Total Demand Distortion1.5.3 Telephone Influence Factor (TIF)1.5.4 C Message Index1.5.5 I * T and V * T Products1.5.6 K Factor1.5.7 Displacement, Distortion, and Total Power Factor1.5.8 Voltage-Related Parameters1.6 Power Quantities under Nonsinusoidal Situations1.6.1 Instantaneous Voltage and Current1.6.2 Instantaneous Power1.6.3 rms Values1.6.4 Active Power1.6.5 Reactive Power1.6.6 Apparent Power1.6.7 Voltage in Balanced Three-Phase Systems1.6.8 Voltage in Unbalanced Three-Phase SystemsReferences