CONTENTSAcknowledgement Abstract List of tablesList of figuresAbbreviation

CHAPTER 1: INTRODUCTION 1-101.1 General 11.2 Power Quality 1.2.1 Definition 21.2.2 Power Quality problems 21.2.3 Solutions to Power Quality problems 51.2.4 Power Quality standards 61.3 Motivation 91.4 Organization of the project 91.5 Objectives of the project 10

CHAPTER 2: LITERATURY SURVEY 11-13

CHAPTER 3: POWER FILTER 14-203.1 Filter 143.2 Classification of active filters according to rating 163.3 Methods of active power filter 163.3.1 Shunt active power filter 163.3.2 Series active power filter 183.3.3 Active power Filter Market 19CHAPTER 4: HIGH Level Design 21-384.1 Design Considerations 214.1.1 Development Methods 21 4.2P Q theory 224.2.1 Principles of p-q theory 224.2.2Proposed Method 254.2.3The p-q theory applied to SAPF 264.2.3. (A) Calculation of p-q theory 284.2.4p-q Theory without Shunt Active Power Filter for load set A 294.2.5p-q Theory without Shunt Active Power Filter for load set B 304.3 Objectives of p-q theory 304.4 Synchronous Detection Method 314.5Architecture Strategies 334.6Data Flow Diagrams 334.6.1. Data Flow Diagram Level 0344.6.2 Data Flow Diagram Level 1354.7Detailed design364.7.1. Functional Description of the Modules36CHAPTER 5: ABOUT MATLAB 39-505.1 MATLAB395.1.1SIMULINK 405.1.2SIMPOWERSYSTEMS 425.1.2.1TheRoleofSimulationinDesign 435.2SimPowerSystemsLibraries435.2.1Three Phasesource445.2.2Three-PhaseV-IMeasurement 47CHAPTER 6: SIMULATION RESULTS AND CONCLUSION 51-566.1 Simulation Results 516.2 Conclusion Future scope 56 BIBLIOGRAPHY 57BIODATA 59

LIST OF TABLES

TABLE 1.2.3: The selection of the type of active power filter to improve power quality 5

TABLE1.2.4(A): Harmonic voltages at PCC until order 25 in percentage of the nominal voltage 6

TABLE 1.2.4(B): Compatibility levels for individual harmonic voltages in public low-voltage networks 7

TABLE 1.2.4 (C): Compatibility levels for harmonics 7

TABLE 1.2.4(D): Maximum distortion levels 8

LIST OF FIGURES

Figure 3.1.(A): Block diagram of a simple power system With APF ON 14

Figure3.1.(B): Block diagram of a simple power system with APF OFF 14

Figure 3.2: Classification of active filters according to rating 14

Figure 3.3.1: Configuration of a shunt active filter system 16

Figure 3.3.2:Configuration of a series active filter system 16

Fig. 4.2.2: Operation of Three Phase Shunt Active Power Filter 25

Figure 4.2.3: Simulink Model for Instantaneous power Theory (p-q theory) with SAPF 26

Figure 4.2.3(A): Calculation of p-q theory 29

Figure 4.2.4: p-q Theory without Shunt Active Power Filter for load set A 29

Figure 4.2.5: p-q Theory without Shunt Active Power Filter for load set B 30

Figure 4.4: Simulink Model Developed for SDM with SAPF 32

Fig 4.5: System power components in a-b-c coordinate 33

Figure4.6.1: Data Flow Diagram Level 0 34

Figure 4.6.2: Data Flow Diagram Level 1 35Figure 6.1: The three phase load currents for load set A (a) (a)and (a) 52

Figure 6.2: The three phase load currents for load set B (a) (a)and (a) 52

Figure 6.3: The three phase source currents before compensation for load 53(P-q-SAPF) (a)(b)and (c)

Figure 6.4: The three phase compensation currents for load 53(p-q SAPF) (a)(b)(c)

Figure 6.5: The three phase source currents after compensation for load 54(p-q -SAPF) (a)(b)and (c)

Figure 6.6: The three phase compensation currents for load 54 (SDM- SAPF) (a)(b)(c)

Figure 6.7: The three phase source currents before compensation for load 55(SDM-SAPF) (a)(b)and (c) Figure 6.8: The three phase source currents after compensation for load 55(SDM-SAPF) (a)(b)and (c)

ABBREVIATIONAC - Alternating CurrentAMP - AmplitudeAPF - Active Power filterCSI - Current Source InverterDC - Direct CurrentDFD- Data Flow DiagramDVR- Dynamic Voltage RegulatorDSP - Digital Signal ProcessorDPFC- Distributed Power Flow ControllerEMC- Electromagnetic CompatibilityEPQ - Electric Power QualityIEC - International Electro-technical CommissionIEEE - Institute of Electrical and Electronics EngineersIGBT - Insulated Gate Bipolar TransistorPCC - Point of Common CouplingPI - Proportional IntegralPID - Proportional Integral and DerivativePWM - Pulse Width Modulationrms - root mean squareSMPs - Switched Mode Power SupplySAPF- Shunt Active Power FilterSDM- Synchronous Detection MethodSRF - Synchronous Reference FrameSVC - static VAR compensatorsTHD - Total Harmonic distortionTV - TelevisionUPS - Uninterruptable Power SupplyUPFC- Unified Power Flow Controller VA - Volt AmpereVAR - Volt Ampere ReactorVSI - Voltage Source Inverter