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The storage battery generally used in electric power station is
nickel-cadmium battery
zinc-carbon battery
lead-acid battery
none of the above
lead-acid battery
The lead-acid battery is the industry standard for electric power stations due to its high reliability and ability to provide large discharge currents for short durations. It is primarily used as a standby power source for critical station auxiliary systems, such as switchgear operation, emergency lighting, and control circuits.
The lead-acid battery is the industry standard for electric power stations due to its high reliability and ability to provide large discharge currents for short durations. It is primarily used as a standby power source for critical station auxiliary systems, such as switchgear operation, emergency lighting, and control circuits.
EcellтАЛтЙИ2.0┬аV тАФ nominal voltage per lead-acid cell
Pb+PbO2тАЛ+2H2тАЛSO4тАЛтЖФ2PbSO4тАЛ+2H2тАЛO тАФ basic chemical equation for discharge/charge
During discharge, lead dioxide (PbO2тАЛ) at the positive plate and spongy lead (Pb) at the negative plate react with sulfuric acid (H2тАЛSO4тАЛ) to produce lead sulfate (PbSO4тАЛ) and water (H2тАЛO). The reversible nature of this chemical reaction allows the battery to be recharged by passing a current in the opposite direction. The electrochemical potential is approximately 2.0┬аV per cell.
Used for DC emergency supplies in power stations.
Provides high surge current capacity for tripping circuit breakers.
Sulfuric acid acts as the electrolyte.
Requires periodic maintenance of electrolyte specific gravity.
Low internal resistance enabling high discharge rates
Cost-effective and widely available
High cell voltage compared to alkaline alternatives
Heavy weight and bulky construction
Requires regular maintenance (topping up with distilled water)
Short life cycle compared to Ni-Cd batteries
Switchgear operation (tripping/closing coils)
Emergency lighting for control rooms
UPS for power station communication equipment
Nickel-cadmium batteries are generally used for specific applications like aircraft or specialized portable tools due to their high cost.
Zinc-carbon batteries are primary cells and are unsuitable for power station standby backup as they cannot be recharged.
C is correct тАФ The lead-acid battery is the preferred choice in electric power stations for its reliability and high discharge current capabilities for emergency control systems.
Always remember that lead-acid batteries are 'Secondary Cells' (rechargeable), whereas batteries like Zinc-Carbon are 'Primary Cells' (non-rechargeable) and cannot be used for stationary power backup.