Shunt generators are most suited for stable parallel operation because of their
A. rising voltage characteristics
B. identical voltage characteristics
C. drooping voltage characteristics
D. linear voltage characteristics
Answer: Option C
Solution (By Examveda Team)
Shunt generators are most suited for stable parallel operation due to their drooping voltage characteristics.Option A: Rising voltage characteristics
Rising voltage characteristics are not suitable for parallel operation as they could cause instability, leading to one generator taking more load than others.
Option B: Identical voltage characteristics
Identical voltage characteristics are desirable for parallel operation, but in practice, it's challenging to achieve exact identical voltage, making this option less feasible.
Option C: Drooping voltage characteristics
Drooping voltage characteristics are ideal for parallel operation as they ensure that as the load increases, the voltage decreases slightly, allowing for automatic load sharing between generators.
Option D: Linear voltage characteristics
Linear voltage characteristics do not provide the necessary voltage drop needed for stable load sharing in parallel operation.
Conclusion:
Shunt generators with drooping voltage characteristics are most suited for stable parallel operation because they facilitate effective load sharing between generators.
This Question Belongs to Electrical Engineering >> D.C. Generators
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A cumulatively compounded long shunt generator when operating as a motor would be
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B. Differentially compounded long shunt
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A. Demagnetization only
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Shunt generators are most suited for stable parallel operation because of their **drooping voltage-current characteristic**.
### Explanation:
- **Drooping Voltage-Current Characteristic**: In a shunt generator, as the load current increases, the terminal voltage decreases slightly. This "drooping" nature of the voltage is due to the increased voltage drop across the armature resistance and the weakening of the shunt field due to armature reaction.
- **Stable Parallel Operation**: When generators are operated in parallel, it's crucial that they share the load proportionally and remain stable without significant interaction. The drooping characteristic helps in this stability because if one generator starts to take more load, its voltage will drop slightly, causing the other generators to take up more of the load. This self-regulating behavior prevents one generator from overloading while the others remain underloaded.
Therefore, the **drooping voltage-current characteristic** of shunt generators makes them ideal for stable parallel operation.