About the video
This lesson explains how to calculate Total Harmonic Distortion (THD) as a percentage of the fundamental frequency, crucial for assessing power quality in electrical systems. You’ll learn how harmonics distort waveforms and how to use Fourier analysis to break down and rebuild these waveforms. The video demonstrates the calculation method, which involves squaring the amplitudes of individual harmonics, summing them, taking the square root, and dividing by the fundamental amplitude. Understanding THD helps in diagnosing power system issues, such as overheating and inefficiency, caused by harmonic distortions. This lesson emphasizes focusing on actual harmonic currents rather than percentages, which can be misleading. To get started, go to the Lesson Content tab and click on the video.
About the quiz
Each lesson contains a video, and is followed up with a simple quiz. Quizzes review information discussed within the video, with each question providing an answer justification. Helping to reinforce correct answers and helps clarify any mistakes through code citations, excerpts, and explanations, so you can better understand the material.
Charges
Charges are rewards you earn for engaging in our learning system. You receive charges for completing both the video and the quiz in each lesson. The amount of charges available for each lesson is displayed in the “Lesson Features” box on the right. The charges you earn are based on the time it takes you to complete the lesson, which is also indicated in “Lesson Features.”