Question

Write the Advantages, Disadvantages and Limitations of Maximum Power Transfer Theorem.

Answer 1

Answer:

advantages and disadvantages:-

The theorem was originally misunderstood (notably by Joule) to imply that a system consisting of an electric motor driven by a battery could not be more than 50% efficient since, when the impedances were matched, the power lost as heat in the battery would always be equal to the power delivered to the motor.

In 1880 this assumption was shown to be false by either Edison or his colleague Francis Robbins Upton, who realized that maximum efficiency was not the same as maximum power transfer.

To achieve maximum efficiency, the resistance of the source (whether a battery or a dynamo) could be (or should be) made as close to zero as possible. Using this new understanding, they obtained an efficiency of about 90%, and proved that the electric motor was a practical alternative to the heat engine.

The condition of maximum power transfer does not result in maximum efficiency.

The efficiency is only 50% when maximum power transfer is achieved, but approaches 100% as the load resistance approaches infinity, though the total power level tends towards zero.

Efficiency also approaches 100% if the source resistance approaches zero, and 0% if the load resistance approaches zero. In the latter case, all the power is consumed inside the source (unless the source also has no resistance), so the power dissipated in a short circuit is zero.

Limitations:

One of the limitation of maximum power theorem is the efficiency is only 50% and therefore it can't be used in power systems where efficiency is the main concern.

Explanation:

Answer 2

Advantages, Disadvantages and Limitations of Maximum Power Transfer Theorem are as follows:

• Advantage - At any point it can analyse the performance and also applicable to ac and dc network.
• Disadvantage - This is not applicable for nonlinear and unilateral networks.
• Limitation - In power system, it cannot be used because its efficiency is only fifty percent and here the main concern is efficiency.