Arc Through - Faults and Protection - High Voltage Direct Current Transmission

TL;DR

This video discusses the R2 fault, a malfunction that occurs mainly at inverter stations, leading to positive voltages across the walls and commutation failures.

Transcript

hello everyone welcome to ekeeda platform and this is ravindra here your electrical faculty and in this video i'm going to talk about the r2 which is one of the malfunctions can be seen in your the converter stations so we will talk about the one by one which i have included the most important points here and which you have to know and understand c... Read More

Key Insights

• 🚉 R2 faults occur mainly at inverter stations where positive voltages are present across the walls.
• 💗 Malfunctions in the gate pulse generator or the arrival of spurious pulses can cause forward-biased pulses, leading to the R2 fault.
• 🇼🇫 Commutation failures, especially in the transfer from wall 1 to wall 3, disrupt the overlapping period, resulting in the R2 fault.
• 💱 The R2 fault introduces a DC component in the transformer current, changing the harmonic components.
• 🥺 The R2 fault can lead to decreased delay angles and the addition of DC components in the system.
• ❓ Capacitors used in the system can contribute to the introduction of DC components in the transformer current.
• 〽️ Harmonic components are altered due to the R2 fault.

Questions & Answers

Q: Where do R2 faults commonly occur?

R2 faults are mainly seen in inverter stations where the voltages across the walls are positive.

Q: What can cause the R2 fault?

Malfunctions in the gate pulse generator or the arrival of spurious pulses can result in forward-biased pulses, leading to the R2 fault.

Q: How do commutation failures contribute to the R2 fault?

Commutation failures, particularly in the transfer from wall 1 to wall 3, disrupt the overlapping period, causing the R2 fault.

Q: How does the R2 fault affect the delay angle?

The R2 fault reduces the delay angle, delaying the firing angle in the system.

Summary & Key Takeaways

• The R2 fault is likely to occur at inverter stations, where the voltages across the walls are positive.

• Malfunctions in the gate pulse generator or the arrival of spurious pulses can lead to forward-biased pulses, causing the R2 fault.

• Commutation failures, particularly in the transfer from wall 1 to wall 3, can result in the overlapping period being disrupted, leading to the R2 fault.