Join 60,000+ competitive exam aspirants
or with email
Your Cart
SubtotalтВ╣0
TotalтВ╣0
Examoogle тАв User тАв info@examoogle.com тАв EE-2024-8821
Chapter 1 of 12 тАв Page 1 of 248ЁЯФТ Protected PDF тАв Watermarked
Join 60,000+ competitive exam aspirants
To reduce peak demand at LDC________ done.
Load Shedding
Reduce generation
Both
None of the above
Load Shedding
Load shedding is a controlled electrical engineering technique used by Load Dispatch Centres (LDC) to maintain grid stability when power demand exceeds available generation capacity. It involves intentionally disconnecting specific electrical loads from the grid to prevent a total blackout or frequency collapse.
Load shedding is a controlled electrical engineering technique used by Load Dispatch Centres (LDC) to maintain grid stability when power demand exceeds available generation capacity. It involves intentionally disconnecting specific electrical loads from the grid to prevent a total blackout or frequency collapse.
PinтАЛтИТPoutтАЛ=dtdтАЛWstoredтАЛ тАФ Power balance equation governing grid frequency dynamics
╬ФfтЙИтИТk╬ФP тАФ Relationship between power deficit and frequency deviation
When the system frequency drops below a critical threshold (typically due to a sudden imbalance where PdemandтАЛ>PgenerationтАЛ), the LDC or automated relays trigger load shedding. This action restores the power balance PgenтАЛтЙИPdemandтАЛ, thereby arresting the frequency decline and maintaining the health of the synchronous generators and grid infrastructure.
Load shedding is the last resort before total system collapse.
It is usually performed in stages based on frequency thresholds (e.g., Under-Frequency Relays).
Essential services (hospitals, railways) are usually protected from rotational load shedding.
LDC prioritizes system stability over uninterrupted supply to non-essential consumers.
Prevents widespread grid failure or cascading outages.
Protects turbine-generator sets from operating at dangerous sub-synchronous speeds.
Causes inconvenience and economic loss to consumers.
Potential damage to industrial processes due to sudden power cuts.
Transmission grid frequency control
Emergency grid management during peak hours
Mitigation of severe generation shortfall
Option B (Reduce generation) is incorrect because an LDC faces a deficit; reducing generation would worsen the supply-demand gap, further lowering frequency.
Standard frequency in Indian grids is 50┬▒0.05 Hz.
A is correct тАФ Load shedding is the deliberate disconnection of electrical loads to balance power demand with available supply and prevent grid instability.
Remember that grid frequency is the direct indicator of the active power balance; low frequency always implies an active power deficit.