In DC transmission line, the power carrying capability is mainly limited by
⚑ Report issue
Found a wrong answer, translation, image or source problem? Send it to editorial review.
Answer & Explanation
Correct AnswerC. the thermal limit of current carrying conductor
Quick Explanation
A DC transmission conductor has no AC stability or reactive-power limit of the same type as an AC line. Its continuous power-transfer capability is therefore mainly constrained by allowable conductor current and temperature—that is, the thermal current-carrying limit.
Formula / Key Relation
Pdc=Vdc Id; Id,max set primarily by conductor thermal rating
Detailed Explanation
Correct Answer
C — the thermal limit of current carrying conductor
Concept and Reasoning
A DC transmission conductor has no AC stability or reactive-power limit of the same type as an AC line. Its continuous power-transfer capability is therefore mainly constrained by allowable conductor current and temperature—that is, the thermal current-carrying limit.
Calculation / Key Relation
Pdc=Vdc Id
Id,max set primarily by conductor thermal rating
Exam Takeaway
For a DC line, think current heating when asked the basic power-carrying limit.
Common Mistake
Do not import AC steady-state stability or reactive-power limits into a simple DC-line question.
Quick Trick
For a DC line, think current heating when asked the basic power-carrying limit.
Common Mistake
Do not import AC steady-state stability or reactive-power limits into a simple DC-line question.
Exam Tip
For a DC line, think current heating when asked the basic power-carrying limit.
Continue learningRelated PYQs & Exam ContextExam path, knowledge path and deeper practice links.
