Discussion on Transformers Connected Directly to Generators

C57.116-1989 is the IEEE Guide for Transformers Specifically Associated with Generators. This guide portrays determination and application contemplations for transformer associated with generators.

The thought is for unit transformer and unit assistant transformers; and furthermore for if associations specifically or through electrical switch, stack break switch and so on.

Sorts of energy transformer utilized with generators 

Three sorts of energy transformers related associated with generators-

01Unit transformers (UT), straightforwardly interfaces the framework (high voltage shopper, network and so on.) and the generator. At the point when these sorts of transformer change the generator voltage advance up to transmission voltage at that point called as Generator venture up (GSU) transformers.

02Unit helper transformers (UAT), specifically interfaces the assistant framework to the generator.

03Station benefit transformers (SST), isn't specifically associated with the generator. It interfaces the helper transport to the framework.

           A typical single ling line diagram in a power plant showing Transformers Connected Directly to Generators

In the event that you consider a typical circumstance a 11KV generator creates energy to the matrix, at that point unit transformer advance up 11KV to 132KV transmission voltage. Presently to drive the generator there is some related assistant framework running like evaporator, electric pump, compressor, even the buyer's nuts and bolts (fan, air conditioning, lighting and so on.). This helper framework is 400-440 voltage. A unit assistant transformer is utilized to advance down 11KV to 440 volt and give energy to the helper framework. A station benefit transformer is utilized to interconnect a framework and the helper transport framework. This may be utilized to additionally venture down or might be for disconnection. 

Generator venture up (GSU) transformers: GSU units change the voltage up from the generator voltage level to the transmission voltage level. 

Helper heaps of Generator: The assistant framework which are required for to run the generator, for example, evaporator to create persistent steam, compressor to keep up gaseous tension, fuel pump to give fuel, cooling fan in the radiator and in the generator and so on. 

Exceptional plan thought for Transformers Associated Specifically to Generators 

• Bringing down the center transition thickness at evaluated voltage to consider task at higher V/Hz without immersion of the center 

• Expanding the outline edge on the mechanical-withstand ability of the windings to represent the likelihood of a blame happening amid a time of over excitation. 

• Expanded Warm limit of the transformer to forestall overheating because of expanded streams.