National Load Dispatch Center is run by

Question

Examoogle · Accepted Answer

Power System Operation Corporation Limited (POSOCO)

Explanation: The National Load Dispatch Center (NLDC) is the apex body mandated to ensure the integrated operation of the Indian power system. It is operated by Power System Operation Corporation Limited (POSOCO), which was recently renamed Grid Controller of India Limited (Grid-India).

Working Principle: NLDC acts as the central authority for real-time grid control and dispatch of electricity across regional grids. It coordinates with Regional Load Dispatch Centers (RLDCs) to monitor grid parameters like frequency, voltage, and inter-regional power flow to maintain grid stability and reliability. It also oversees the implementation of the Availability Based Tariff (ABT) and manages the scheduling of inter-state transmission of electricity.

Key Formulas: $f_{actual} \approx f_{nominal} \pm 0.05 Hz$ — Frequency stability target for grid reliability; $P_{flow} = \frac{V_1 V_2}{X} \sin(\delta_1 - \delta_2)$ — Real power transmission principle controlled by NLDC/RLDC

Key Points: NLDC is the apex body for integrated power system operation.; Previously part of PGCIL, POSOCO was carved out as an independent entity in 2009.; Renamed to 'Grid Controller of India Limited' in 2022.; Ensures optimum scheduling and dispatch of electricity.

Advantages: Ensures grid frequency stability; Improves regional and national energy security; Effective management of cross-border power transmission

Disadvantages: Highly complex computational requirements; Susceptible to cyber-security threats in modern SCADA systems

Applications: Real-time Load Dispatch; Grid Management and Control; Settlement of Energy Accounts

Additional Info: POSOCO is now officially known as the Grid Controller of India Limited (Grid-India).. Option A (PGCIL) is incorrect as POSOCO was separated from PGCIL to ensure independence in system operation.

Answer: B is correct — The National Load Dispatch Center is operated by Power System Operation Corporation Limited (now Grid-India).

Exam Tip: Always remember that in the Indian power sector, 'Operation' is separated from 'Transmission' (PGCIL) to maintain neutrality in power dispatch, which is why POSOCO/Grid-India exists.

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