Electronics and Electrical Engineering interview Question and Answers for fresh engineers (Part 8)
In this topic we know about the substation and its some
requirements for setup.
Question: What do you mean by
substation? Give some details.
Answer: The electric power is
now generated in the form of alternating current. The electric power is
produced in the power station, which is generally very far from the consumer
premises. So, the generation, transmission and distribution are facing much
difficulty. It is distributed to the consumer or user by the help of a very
large interconnected network. In the network it is very important to change
some characteristics for transmitting and distributing the electric power
properly. Such as, ac to dc conversion (by using thyratron and mercury arc
rectifier), voltage up or down (If the generating voltage is 11kv then transfer
it to the high voltage range of 220kv), frequency change, power factor
correction and improvement. This change needs a setup of some apparatus
properly, in short this types of setup is called substation.
The assembly of electrical apparatus whose purpose is
changing the some major characteristics of the electric supply system is called
substation.
The substation is very important for achieving the
continuity of supply to the consumers. In some cases the ac is need to convert
in dc for running the dc motor, traction, electroplating processes this type of
conversion is performed by the sub-station (ignitron).
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| SUB STATION |
Question: What are the basic requirements for setup a substation? Or which conditions are considerable for setup a substation?
Answer: The continuity of
electric energy supply system is solely depending on substation. So, enough
care should be taken when designing and set upping a sub station in a suitable
place.
Some points are as follows,
·
The substation
must have the chance of easy operation and maintenance.
·
The place must be
proper for setup a substation. It must be setup near the centre of the load.
·
The substation
must have enough safety apparatus or safety setup. There must be enough chance
for running the maintenance and clearing process. Also there should be setup
for fire protection.
·
The system must
be reliable. When designing protected gears and other instruments must be
included. The construction process also maintained properly for reliable
operation.
·
The capital cost
must be as low as possible.
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2 comments:
The ability to easily transform the voltage of AC power is important for two reasons: Firstly, power can be transmitted over long distances with less loss at higher voltages. So in power networks where generation is distant from the load, it is desirable to step-up the voltage of power at the generation point and then step-down the voltage near the load. Secondly, it is often more economical to install turbines that produce higher voltages than would be used by most appliances, so the ability to easily transform voltages means this mismatch between voltages can be easily managed.
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Engineering Institute | MBA Btech Admission 2017
Special thanks for these Questions. Really helpful.
I would appreciate a similar kind of information in the future.
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