Reliability and other factors of DC Transmission

TL;DR

The reliability of HVDC transmission systems is better than that of AC transmission systems due to advancements in thyristor valves, light-triggered thyristors, and other factors.

Transcript

welcome students in this video we are going to discuss about the reliability and other factors no DC transmission systems in previous video we have discussed about the economics and technical performance of the HVDC transmission system so this video will be completely dealing with the reliability and other factors which supports the DC transmission... Read More

Key Insights

• 🙂 HVDC transmission systems have better reliability compared to AC transmission systems, thanks to advancements in thyristor valves and light-triggered thyristors.
• ❓ Energy availability and transient reliability are measures of reliability in transmission systems.
• ✋ HVDC transmission systems have a higher energy availability and transient reliability compared to AC transmission systems.
• ✊ DC transmission systems are more reliable in the event of a failure, as the other pole can supply 50% of power with a ground return.
• 🌸 HVDC transmission systems have lower overvoltage levels and less power loss compared to AC transmission systems.
• ✊ AC transmission systems require reactive power compensation, while DC transmission systems eliminate this need.
• 🤔 DC transmission systems have thinner insulation and higher working stress compared to AC transmission systems.

Questions & Answers

Q: What is power system reliability?

Power system reliability is the ability of the system to meet customer demand and work without any issues or faults.

Q: Why do HVDC transmission systems have better reliability?

HVDC transmission systems have better reliability due to advancements in thyristor valves and the use of light-triggered thyristors for control and protection.

Q: How is reliability measured in transmission systems?

Reliability in transmission systems can be measured using factors like energy availability and transient reliability.

Q: How are energy availability and transient reliability calculated?

Energy availability is calculated as 1 - (equivalent outage time / total time) and is expressed as a percentage. Transient reliability is calculated as 100 x (number of times HVDC systems performed well / number of recordable AC faults).

Summary & Key Takeaways

• Power system reliability is defined as the ability of the system to satisfy customer demand and work effectively without any issues.

• HVDC transmission systems have better reliability compared to AC transmission systems, thanks to advancements in thyristor valves and the use of light-triggered thyristors for control and protection.

• Reliability in transmission systems can be measured in terms of energy availability and transient reliability.