Power Quality and Harmonics

Understand the fundamental concepts of power quality in power electronic systems.

Definition of power quality and its importance in electrical systems. Key power quality parameters: voltage sag, swell, flicker, interruptions, and transients. Standards and regulations for power quality (e.g., IEEE 519, IEC 61000). Impact of poor power quality on power electronic systems and end-user equipment.

Learn the causes and effects of harmonics in power systems.

Definition and origin of harmonics: nonlinear loads, switching devices. Types of harmonics: odd, even, triplen, and interharmonics. Effects of harmonics on power systems: overheating, resonance, reduced efficiency, and equipment malfunctions. Sources of harmonics in power electronics: rectifiers, inverters, motor drives, and switched-mode power supplies.

Analyse power quality issues and their impact on power electronic devices.

Methods for detecting and analysing power quality disturbances. Effects of voltage unbalance, flicker, and transients on power electronics. Case studies of power quality problems in industrial, commercial, and residential settings. Economic impact of power quality issues: energy losses, downtime, maintenance costs.

Explore methods for harmonic analysis and measurement.

Techniques for harmonic analysis: Fourier analysis, harmonic distortion indices (THD, TDD). Use of harmonic analysers, power quality meters, and oscilloscopes. Interpretation of harmonic data and identification of harmonic sources. Power quality monitoring systems and real-time data acquisition.

Understand and apply techniques for mitigating harmonics and improving power quality.

Passive filters: design and application of single-tuned, double-tuned, and broadband filters. Active filters: principles, design, and applications of shunt and series active filters. Hybrid filters: combination of passive and active filters for enhanced performance. Other mitigation techniques: power factor correction, harmonic injection, phase shifting, and isolation transformers.

Implement and evaluate power quality improvement strategies in practical applications.

Design and implementation of power quality improvement solutions in industrial, commercial, and residential settings. Evaluation of the effectiveness of harmonic mitigation techniques. Case studies of successful power quality improvement projects. Troubleshooting and resolving power quality issues in real-world applications.