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A substations used for voltage level change is known as
Transformer substation
Power factor correction substation
Frequency changer substation
None of above
Transformer substation
A transformer substation is a critical node in an electrical power grid designed primarily to change voltage levels using power transformers. It facilitates the step-up of voltage for efficient long-distance transmission and the step-down of voltage for safe distribution to consumers.
A transformer substation is a critical node in an electrical power grid designed primarily to change voltage levels using power transformers. It facilitates the step-up of voltage for efficient long-distance transmission and the step-down of voltage for safe distribution to consumers.
VsтАЛVpтАЛтАЛ=NsтАЛNpтАЛтАЛ=IpтАЛIsтАЛтАЛ тАФ Transformer voltage and current transformation ratio
The principle is based on Faraday's Law of Electromagnetic Induction. A varying magnetic flux in the primary winding induces an EMF in the secondary winding proportional to the turns ratio. The relation is given by V2тАЛV1тАЛтАЛ=N2тАЛN1тАЛтАЛ, allowing power to be transferred between circuits at different voltage levels while maintaining frequency.
Substations enable the economic transmission of power at high voltages to reduce I2R losses.
Transformers are the primary equipment within these substations.
Substations also house switchgear, lightning arresters, and protective relays for system safety.
Minimizes transmission line losses
Allows interconnection of grids for reliability
Provides voltage regulation for consumers
High initial investment cost
Requires significant maintenance and security
Risk of equipment failure impacting large areas
Power generating stations (Step-up)
Distribution networks (Step-down for household use)
Option B (Power factor correction) usually involves capacitor banks or synchronous condensers, not primarily voltage changing.
Option C (Frequency changer) is used for connecting grids with different operating frequencies, such as 50Hz and 60Hz systems.
A is correct тАФ A transformer substation is specifically designed to step up or step down voltage levels using power transformers to suit the requirements of transmission, distribution, and utilization.
Always remember that in transmission systems, we step up voltage to reduce line current (I=P/V), which drastically reduces power loss since PlossтАЛтИЭI2.