Question

which type of the dc generators has the poorest voltage regulation

Answer 1

To find out the poorest voltage regulation among the dc generators we have to understand what is meant by voltage regulation.

Voltage regulation is a kind of attribute which determines the quality of the dc generator. Voltage regulation is the attribute that tells us how close the output of the generator is relative to our desired value; it is a measure of the change in the voltage magnitude between the sending and receiving end of a component, such as a transmission or distribution line.

Poor voltage regulation means there is a significant voltage deviation between the sending end and receiving end and significant deviation in voltage levels due to change in loading conditions.

Good voltage regulation means the ability of a system to provide near-constant voltage over a wide range of load conditions.

During the on-loading condition, it is a Differential Compounded DC generator that has the poorest voltage regulation. There is a large variation in the terminal voltage with increasing load in the case of differentially Compounded dc generators. In the differential compound, machine shunt and series field flux is subtracted and the net field flux is reduced. This results in a decrease of induced emf and, therefore, in terminal voltage. In such generators, the terminal voltage drops very rapidly with the increase in load current.

Ans. Differentially compounded dc generator