Which of the following is not an advantage of HVDC transmission?
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Answer & Explanation
Correct AnswerD. Cheap cost of equipment (converters)
Quick Explanation
HVDC has no line charging current, no skin effect in steady DC conductor current, and no AC-type steady-state angular stability limit on the DC line. However converter stations are complex and expensive, so “cheap cost of equipment (converters)” is not an advantage. Therefore option D.
Formula / Key Relation
HVDC line advantages must be weighed against costly converter terminals
Detailed Explanation
Correct Answer
D — Cheap cost of equipment (converters)
Concept and Reasoning
HVDC has no line charging current, no skin effect in steady DC conductor current, and no AC-type steady-state angular stability limit on the DC line. However converter stations are complex and expensive, so “cheap cost of equipment (converters)” is not an advantage. Therefore option D.
Calculation / Key Relation
HVDC line advantages must be weighed against costly converter terminals
Exam Takeaway
HVDC saves on line behavior but pays a converter-station cost penalty.
Common Mistake
Do not confuse lower long-distance transmission cost with low converter-equipment cost.
Quick Trick
HVDC saves on line behavior but pays a converter-station cost penalty.
Common Mistake
Do not confuse lower long-distance transmission cost with low converter-equipment cost.
Exam Tip
HVDC saves on line behavior but pays a converter-station cost penalty.
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