ઇન્ફિનિટ બસ બાર સાથે જોડાયેલા ઓલ્ટરનેટરમાં પ્રાઇમ મૂવર ઇનપુટ વધારતાં ઓલ્ટરનેટર દ્વારા અપાતો સક્રિય પાવર _______
જવાબ અને પગલાવાર ઉકેલ
ઇન્ફિનિટ બસ સાથે જોડાયેલા ઓલ્ટરનેટરમાં બસ વોલ્ટેજ અને આવૃત્તિ અચળ રહે છે. પ્રાઇમ મૂવરનું યાંત્રિક ઇનપુટ વધારતાં ટોર્ક ખૂણો δ વધે છે અને બસને અપાતો સક્રિય પાવર વધે છે.
વિગતવાર ઉકેલ (મૂળ ભાષામાં)
Concept & Reasoning
An infinite bus is so large that one generator cannot appreciably change its voltage or frequency. Once synchronized, mechanical input from the prime mover mainly controls real power, while field excitation mainly controls reactive power/power factor. Increasing turbine or engine input accelerates the rotor momentarily, increasing power angle δ until the electromagnetic power rises to a new balance. Thus active power output increases.
How to Solve It in the Exam
Prime mover controls MW; excitation controls MVAr.
Important Exam Point
Keep infinite-bus voltage and frequency fixed in your reasoning.
Quick Trick
Prime mover controls MW; excitation controls MVAr.
Common Mistake
Do not expect frequency to rise appreciably when a single generator is tied to an infinite bus.
The active power delivered by an alternator will _______ when the prime mover input is increased for the alternator connected to infinite bus bar.
Answer & step-by-step solution
For an alternator connected to an infinite bus, bus voltage and frequency are fixed. Increasing prime-mover mechanical input increases torque angle δ and therefore increases the active power delivered to the bus.
Concept & Reasoning
An infinite bus is so large that one generator cannot appreciably change its voltage or frequency. Once synchronized, mechanical input from the prime mover mainly controls real power, while field excitation mainly controls reactive power/power factor. Increasing turbine or engine input accelerates the rotor momentarily, increasing power angle δ until the electromagnetic power rises to a new balance. Thus active power output increases.
How to Solve It in the Exam
Prime mover controls MW; excitation controls MVAr.
Important Exam Point
Keep infinite-bus voltage and frequency fixed in your reasoning.
Quick Trick
Prime mover controls MW; excitation controls MVAr.
Common Mistake
Do not expect frequency to rise appreciably when a single generator is tied to an infinite bus.
इनफिनिट बस बार से जुड़े ऑल्टरनेटर में प्राइम मूवर इनपुट बढ़ाने पर ऑल्टरनेटर द्वारा दी गई सक्रिय शक्ति _______
उत्तर और चरणबद्ध हल
इनफिनिट बस से जुड़े ऑल्टरनेटर में बस वोल्टेज और आवृत्ति स्थिर रहते हैं। प्राइम मूवर का यांत्रिक इनपुट बढ़ाने से टॉर्क कोण δ बढ़ता है और बस को दी गई सक्रिय शक्ति बढ़ती है।
विस्तृत हल (मूल भाषा में)
Concept & Reasoning
An infinite bus is so large that one generator cannot appreciably change its voltage or frequency. Once synchronized, mechanical input from the prime mover mainly controls real power, while field excitation mainly controls reactive power/power factor. Increasing turbine or engine input accelerates the rotor momentarily, increasing power angle δ until the electromagnetic power rises to a new balance. Thus active power output increases.
How to Solve It in the Exam
Prime mover controls MW; excitation controls MVAr.
Important Exam Point
Keep infinite-bus voltage and frequency fixed in your reasoning.
Quick Trick
Prime mover controls MW; excitation controls MVAr.
Common Mistake
Do not expect frequency to rise appreciably when a single generator is tied to an infinite bus.
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