Basic Introduction to Harmonics - Harmonics - High Voltage Direct Current Transmission

TL;DR

This video provides a basic introduction to harmonics in electrical systems, discussing their introduction in HVDC converters and the problems they can cause.

Transcript

hello everyone welcome to ekita platform and this is ravin janet here your electrical faculty and in this video i'm going to talk about the basic introduction related with the harmonics so let's talk about one by one i have included some important points related with the harmonics so we will talk about of them so if i talk about the first point it ... Read More

Key Insights

• 🔙 HVDC converters introduce both AC and DC harmonics due to the operation of HVDC transmission systems.
• 🫥 Harmonics can cause interference to telephonic lines and overvoltages due to resonance effects.
• 🎮 Converter control systems may become unstable due to harmonics, and load management systems can experience interference.
• ✊ Additional power losses and equipment heating can occur as a result of harmonics in the system.
• 🔙 AC filters are used to filter out AC harmonics, while DC filters with smoothing reactor filters are used for DC harmonics.
• 🎨 Passive type filters with inductors and capacitors can be designed to filter out specific harmonics.

Questions & Answers

Q: Why do HVDC converters introduce both AC and DC harmonics?

HVDC transmission systems operate with both AC and DC, and the transmission lines only carry DC currents. Therefore, harmonics are introduced on both the AC and DC sides.

Q: What problems can harmonics cause?

Harmonics can cause interference to telephonic lines, overvoltages due to resonance effects, instability in converter control systems, interference with load management systems, and additional power losses.

Q: How are AC and DC harmonics filtered out?

AC harmonics are filtered out using AC filters, which can be tuned or high pass filters. DC harmonics are filtered out using DC filters, typically consisting of smoothing reactor filters.

Q: How can harmonics be mitigated in electrical systems?

Harmonics can be mitigated by using passive type filters with inductors and capacitors, and by designing active filters on both the AC and DC sides.

Summary & Key Takeaways

• HVDC converters introduce both AC and DC harmonics due to the nature of HVDC transmission systems.

• Harmonics cause interference to telephonic lines and overvoltages due to resonance effects.

• Harmonics can lead to instability in converter control systems and interference with load management systems.