નીચેનાં વિધાનો ધ્યાનમાં લો: સ્થિરતા અભ્યાસમાં સમાવેશ થાય છે
1. પાવર સિસ્ટમના વિદ્યુત-યાંત્રિક ગતિશીલ વર્તનના અભ્યાસનો મુખ્ય વિશ્લેષણાત્મક અભિગમ.
2. એક કે થોડાં મશીનોની સંડોવણી અથવા ધીમી સંચાલન સ્થિતિમાં ક્રમિક ફેરફાર.
3. પ્રણાલીના મૂળભૂત રીતે સ્થિર-અવસ્થા સંચાલન બિંદુઓના લોકસનું નિર્ધારણ.
4. વિક્ષુબ્ધ મશીનોના રોટર અચળ ઝડપ સંચાલન પર પાછા ફરે છે કે નહીં તેનું નિર્ધારણ.
આમાંથી કયાં વિધાનો સાચાં છે?
જવાબ અને પગલાવાર ઉકેલ
D — ફક્ત 1 અને 4. સ્થિરતા અભ્યાસ પાવર સિસ્ટમના વિદ્યુત-યાંત્રિક (રોટર-કોણ) ગતિશીલ વર્તનનું મુખ્ય વિશ્લેષણ છે અને તે જુએ છે કે વિક્ષોભ પછી રોટર સિંક્રોનસ ઝડપે પાછા ફરે છે કે નહીં. સ્થિર-અવસ્થા બિંદુઓનું નિર્ધારણ લોડ ફ્લોનું કામ છે.
વિગતવાર ઉકેલ (મૂળ ભાષામાં)
Statement-wise Verification
- Statement 1 - Correct.
the major analytical approach to the study of power system electromechanical dynamic behaviour.
Stability studies focus strongly on rotor-angle/electromechanical dynamics rather than ordinary steady-state voltage calculation alone. - Statement 2 - Incorrect.
the involvement of one or just a few machines or gradual changes in undergoing slow operating conditions.
The correct principle is: Power-system stability concerns the ability of synchronous machines and network states to remain or return to acceptable operation after disturbances. - Statement 3 - Incorrect.
the determination of the locus of essentially steady-state operating points of the system.
The correct principle is: Stability studies focus strongly on rotor-angle/electromechanical dynamics rather than ordinary steady-state voltage calculation alone. - Statement 4 - Correct.
the determination of whether or not the rotors of the machines being perturbed, return to the constant speed operation.
Power-system stability concerns the ability of synchronous machines and network states to remain or return to acceptable operation after disturbances.
Core Concept
Power-system stability concerns the ability of synchronous machines and network states to remain or return to acceptable operation after disturbances. Series compensation can increase transfer capability by reducing effective reactance, and parallel transmission paths can reduce transfer reactance. Stability studies focus strongly on rotor-angle/electromechanical dynamics rather than ordinary steady-state voltage calculation alone.
Formula / Key Relationship
Simplified transfer P≈(EV/X)sinδ; reducing effective X raises transfer capability.
Why the Other Options Are Wrong
Option A is incorrect because it includes incorrect statement(s) 2, 3 and omits correct statement(s) 4. Option B is incorrect because it includes incorrect statement(s) 2, 3. Option C is incorrect because it includes incorrect statement(s) 2, 3 and omits correct statement(s) 1.
Exam Shortcut / Approach
Lower transfer reactance generally improves synchronizing power margin.
Common Mistake
Do not confuse ordinary load flow with a dynamic stability study.
Quick Revision
Electromechanical Rotor-Angle Dynamics is linked with Stability Studies, Power System Stability and Power Systems. Lower transfer reactance generally improves synchronizing power margin.
Consider the following statements: Stability studies constitute
1. the major analytical approach to the study of power system electromechanical dynamic behaviour.
2. the involvement of one or just a few machines or gradual changes in undergoing slow operating conditions.
3. the determination of the locus of essentially steady-state operating points of the system.
4. the determination of whether or not the rotors of the machines being perturbed, return to the constant speed operation.
Which of these statements are correct?
Answer & step-by-step solution
Power-system stability concerns the ability of synchronous machines and network states to remain or return to acceptable operation after disturbances. Stability studies focus strongly on rotor-angle/electromechanical dynamics rather than ordinary steady-state voltage calculation alone. Key relation: Simplified transfer P≈(EV/X)sinδ; reducing effective X raises transfer capability.
Exam focus: Lower transfer reactance generally improves synchronizing power margin. Common trap: Do not confuse ordinary load flow with a dynamic stability study.
Statement-wise Verification
- Statement 1 - Correct.
the major analytical approach to the study of power system electromechanical dynamic behaviour.
Stability studies focus strongly on rotor-angle/electromechanical dynamics rather than ordinary steady-state voltage calculation alone. - Statement 2 - Incorrect.
the involvement of one or just a few machines or gradual changes in undergoing slow operating conditions.
The correct principle is: Power-system stability concerns the ability of synchronous machines and network states to remain or return to acceptable operation after disturbances. - Statement 3 - Incorrect.
the determination of the locus of essentially steady-state operating points of the system.
The correct principle is: Stability studies focus strongly on rotor-angle/electromechanical dynamics rather than ordinary steady-state voltage calculation alone. - Statement 4 - Correct.
the determination of whether or not the rotors of the machines being perturbed, return to the constant speed operation.
Power-system stability concerns the ability of synchronous machines and network states to remain or return to acceptable operation after disturbances.
Core Concept
Power-system stability concerns the ability of synchronous machines and network states to remain or return to acceptable operation after disturbances. Series compensation can increase transfer capability by reducing effective reactance, and parallel transmission paths can reduce transfer reactance. Stability studies focus strongly on rotor-angle/electromechanical dynamics rather than ordinary steady-state voltage calculation alone.
Formula / Key Relationship
Simplified transfer P≈(EV/X)sinδ; reducing effective X raises transfer capability.
Why the Other Options Are Wrong
Option A is incorrect because it includes incorrect statement(s) 2, 3 and omits correct statement(s) 4. Option B is incorrect because it includes incorrect statement(s) 2, 3. Option C is incorrect because it includes incorrect statement(s) 2, 3 and omits correct statement(s) 1.
Exam Shortcut / Approach
Lower transfer reactance generally improves synchronizing power margin.
Common Mistake
Do not confuse ordinary load flow with a dynamic stability study.
Quick Revision
Electromechanical Rotor-Angle Dynamics is linked with Stability Studies, Power System Stability and Power Systems. Lower transfer reactance generally improves synchronizing power margin.
निम्नलिखित कथनों पर विचार कीजिए: स्थिरता अध्ययन में शामिल है
1. पावर सिस्टम के विद्युत-यांत्रिक गतिशील व्यवहार के अध्ययन का प्रमुख विश्लेषणात्मक दृष्टिकोण।
2. एक या कुछ मशीनों की भागीदारी या धीमी संचालन परिस्थितियों में क्रमिक परिवर्तन।
3. प्रणाली के मूलतः स्थिर-अवस्था संचालन बिंदुओं के लोकस का निर्धारण।
4. यह निर्धारण कि विक्षुब्ध मशीनों के रोटर स्थिर गति संचालन पर लौटते हैं या नहीं।
इनमें से कौन-से कथन सही हैं?
उत्तर और चरणबद्ध हल
D — केवल 1 और 4। स्थिरता अध्ययन पावर सिस्टम के विद्युत-यांत्रिक (रोटर-कोण) गतिशील व्यवहार का प्रमुख विश्लेषण है और यह देखता है कि विक्षोभ के बाद रोटर सिंक्रोनस गति पर लौटते हैं या नहीं। स्थिर-अवस्था बिंदुओं का निर्धारण लोड फ्लो का काम है।
विस्तृत हल (मूल भाषा में)
Statement-wise Verification
- Statement 1 - Correct.
the major analytical approach to the study of power system electromechanical dynamic behaviour.
Stability studies focus strongly on rotor-angle/electromechanical dynamics rather than ordinary steady-state voltage calculation alone. - Statement 2 - Incorrect.
the involvement of one or just a few machines or gradual changes in undergoing slow operating conditions.
The correct principle is: Power-system stability concerns the ability of synchronous machines and network states to remain or return to acceptable operation after disturbances. - Statement 3 - Incorrect.
the determination of the locus of essentially steady-state operating points of the system.
The correct principle is: Stability studies focus strongly on rotor-angle/electromechanical dynamics rather than ordinary steady-state voltage calculation alone. - Statement 4 - Correct.
the determination of whether or not the rotors of the machines being perturbed, return to the constant speed operation.
Power-system stability concerns the ability of synchronous machines and network states to remain or return to acceptable operation after disturbances.
Core Concept
Power-system stability concerns the ability of synchronous machines and network states to remain or return to acceptable operation after disturbances. Series compensation can increase transfer capability by reducing effective reactance, and parallel transmission paths can reduce transfer reactance. Stability studies focus strongly on rotor-angle/electromechanical dynamics rather than ordinary steady-state voltage calculation alone.
Formula / Key Relationship
Simplified transfer P≈(EV/X)sinδ; reducing effective X raises transfer capability.
Why the Other Options Are Wrong
Option A is incorrect because it includes incorrect statement(s) 2, 3 and omits correct statement(s) 4. Option B is incorrect because it includes incorrect statement(s) 2, 3. Option C is incorrect because it includes incorrect statement(s) 2, 3 and omits correct statement(s) 1.
Exam Shortcut / Approach
Lower transfer reactance generally improves synchronizing power margin.
Common Mistake
Do not confuse ordinary load flow with a dynamic stability study.
Quick Revision
Electromechanical Rotor-Angle Dynamics is linked with Stability Studies, Power System Stability and Power Systems. Lower transfer reactance generally improves synchronizing power margin.
More Power System Stability questions