POWER QUALITY ENHANCEMENT TECHNIQUES IN SMART GRID

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INTRODUCTION Power Quality Problems: Voltage flickers: Transients: Impulsive transients: Oscillatory transients: Voltage fluctuations: Waveform distortion: DC offset: Harmonics: Harmonics Definition: Causes of Harmonics: Effects of Harmonic Distortion: Interharmonics: Notching: Noise: Power frequency variations: Long-Duration Voltage Variations: Overvoltage: Undervoltage: Voltage swell: Interruption: Sustained interruptions: Voltage Imbalance: Short-Duration Voltage Variations: Voltage sag (dips): Power Quality Issues of Smart Grids: Smart Microgrids: Concept of Smart Grid: Driving Factors of Smart Grids: Challenges in Smart grid Power Quality: Power Electronic devices: Plug-In Hybrid Electrical Vehicles Integration: Renewable Energy Sources Integration: Power Quality Enhancement in Smart Grid: Passive Compensation Approach: Potentialities of Passive Filter: Limitations of Passive Filter: Active Compensation Approach: Series Active Filter: Shunt Active Filter: Three-phase, Three-wire active power filter: Three-phase, Four-wire active power filter: Three-phase, Four-wire split capacitor APF Topology Three-phase, Four-wire Four-leg APF Topology: Hybrid Active Filter: Unified Power Quality Conditioner: Motivation: Scope of the Thesis: Thesis Outline: Summary: Shunt Active Power Filter for Three-Phase, Four-Wire Systems Introduction: Reference Current Generation: P-Q-O Theory: Improved P-Q-O Theory with PLL: Cross-Vector Theory: Improved Cross-Vector Theory: pqr Theory: Synchronous Reference Frame Theory: Current Injection Techniques: Hysteresis Current Control Technique: Advantages of Hysteresis PWM: Disadvantages of Hysteresis PWM: Principle of the 3 dimensional hysteresis PWM techniques: 3 Dimensional Hysteresis PWM Technique: DC Link Voltage Control: Summary: Simulation Results and Discussion Introduction First scenario: The proposed shunt active power filter is not used. Third scenario: The proposed shunt active power filter is used. Summary: Three-Level Neural-Point-Clamped Inverter Based Three-phase Four-wire active Power Filter Introduction PWM technique for Four-leg three-level inverters Description of the APF Topology Harmonics and reactive power calculation Simulation Results and Discussion. First case: The proposed shunt active power filter is not used Second case: The proposed shunt active power filter is used. Summary: Conclusion and Future Work Conclusion Suggestions for Future Work

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