Two six pulse converters used for bipolar HVDC transmission system are rated at 1000 MW, ± 200 kV. What is the DC transmission voltage?
Answer & step-by-step solution
A ±200 kV bipolar HVDC system has one pole at +200 kV and the other at −200 kV with respect to ground. Therefore the pole-to-pole transmission voltage is 200 − (−200) = 400 kV.
Concept & Reasoning
The ± notation gives each pole's voltage relative to earth/neutral. In a bipolar scheme the useful voltage between conductors is twice the pole-to-ground magnitude. The MW rating is not needed to calculate this voltage.
How to Solve It in the Exam
±V bipolar link → conductor-to-conductor voltage = 2V.
Important Exam Point
Separate pole voltage from pole-to-pole transmission voltage.
Quick Trick
±V bipolar link → conductor-to-conductor voltage = 2V.
Common Mistake
Reporting 200 kV because each individual pole is rated 200 kV to ground.
द्विध्रुवीय (bipolar) HVDC पारेषण प्रणाली के लिए उपयोग किए गए दो छह-पल्स कन्वर्टर 1000 MW, ± 200 kV पर रेटेड हैं। DC पारेषण वोल्टेज क्या है?
उत्तर और चरणबद्ध हल
B — 400 kV। ±200 kV द्विध्रुवीय प्रणाली में एक पोल ग्राउंड के सापेक्ष +200 kV और दूसरा −200 kV पर है, अतः पोल-से-पोल वोल्टेज = 200 − (−200) = 400 kV।
विस्तृत हल (मूल भाषा में)
Concept & Reasoning
The ± notation gives each pole's voltage relative to earth/neutral. In a bipolar scheme the useful voltage between conductors is twice the pole-to-ground magnitude. The MW rating is not needed to calculate this voltage.
How to Solve It in the Exam
±V bipolar link → conductor-to-conductor voltage = 2V.
Important Exam Point
Separate pole voltage from pole-to-pole transmission voltage.
Quick Trick
±V bipolar link → conductor-to-conductor voltage = 2V.
Common Mistake
Reporting 200 kV because each individual pole is rated 200 kV to ground.
દ્વિધ્રુવી (bipolar) HVDC પારેષણ પ્રણાલી માટે વપરાયેલા બે છ-પલ્સ કન્વર્ટર 1000 MW, ± 200 kV પર રેટેડ છે. DC પારેષણ વોલ્ટેજ શું છે?
જવાબ અને પગલાવાર ઉકેલ
B — 400 kV. ±200 kV દ્વિધ્રુવી પ્રણાલીમાં એક પોલ ગ્રાઉન્ડની સાપેક્ષે +200 kV અને બીજો −200 kV પર છે, તેથી પોલ-થી-પોલ વોલ્ટેજ = 200 − (−200) = 400 kV.
વિગતવાર ઉકેલ (મૂળ ભાષામાં)
Concept & Reasoning
The ± notation gives each pole's voltage relative to earth/neutral. In a bipolar scheme the useful voltage between conductors is twice the pole-to-ground magnitude. The MW rating is not needed to calculate this voltage.
How to Solve It in the Exam
±V bipolar link → conductor-to-conductor voltage = 2V.
Important Exam Point
Separate pole voltage from pole-to-pole transmission voltage.
Quick Trick
±V bipolar link → conductor-to-conductor voltage = 2V.
Common Mistake
Reporting 200 kV because each individual pole is rated 200 kV to ground.
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