AC Current and DC Voltage Harmonics - Analysis of the Bridge Rectifier - HVDC Transmission | Summary and Q&A

TL;DR
This video discusses the concept of harmonics in electrical systems, the impact on machinery, waveform distortion, and the calculation of harmonics using Fourier analysis.
Key Insights
- ❓ Harmonics in electrical systems can cause machinery to operate undesirably, exceeding permissible values.
- ⚡ Waveforms of AC current and DC voltage can become distorted due to the presence of harmonics.
- 😑 Fourier analysis is used to express waveforms with harmonics, enabling the calculation of harmonic components.
- 🔺 The reduction factor of harmonics can vary based on the overlapping angle, harmonic order, and firing angle.
- 🪈 Higher order harmonics are more affected by increasing overlapping angles compared to lower order harmonics.
- 😌 The reduction factor for harmonics typically lies in the range of 0.1 to 0.2.
- ⚡ Harmonics in DC voltage can also be altered due to overlap, and formulas are available to calculate the harmonic components.
Transcript
hello everyone welcome to igita platform and this is ravin jangood here your electrical faculty and in this video i'm going to talk about the ac current and the dc voltage harmonics so let's start one by one and i have taken the some of the important points which i have included here so let's study so if we talk about the ac current and the dc volt... Read More
Questions & Answers
Q: What are harmonics and how do they affect electrical systems?
Harmonics are unwanted frequencies that can cause machinery to operate in an unwanted manner. They can exceed the permissible value for machinery, leading to potential hazards.
Q: How are AC current and DC voltage waveforms affected by harmonics?
Both AC current and DC voltage waveforms can become distorted due to the presence of harmonics. This distortion affects the expression of the fundamental component of the waveforms.
Q: What is the role of Fourier analysis in understanding harmonics?
Fourier analysis is essential in expressing waveforms with unwanted frequencies. It helps derive the actual expressions of current and calculates the harmonic components using sine and cosine functions.
Q: How can the reduction factor of harmonics be determined?
The reduction factor, which compares the harmonics with and without overlap, can be calculated using a formula that includes variables such as the overlapping angle, harmonic order, and alpha.
Summary & Key Takeaways
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Harmonics are unwanted frequencies that can affect the operation of machinery in electrical systems.
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The waveforms of AC current and DC voltage can become distorted due to harmonics.
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Fourier analysis is used to express the waveform with harmonics, and formulas are provided to calculate different components of the harmonics.
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