LOAD DISPATCH CENTRE

In the Interconnected power system, all the generating stations are connected in parallel with the help of the grid. It is most important and necessary to coordinate these all generators for best economical operation. The load dispatch centre is an organisation which coordinates all power stations. The Load dispatch centre is the most link between different parts of the system. The LDC is used to coordinate, planning, control, and monitoring the power demand and generation. The LDC links generation, transmission, and distribution which coordinate the power requirements of the electricity consumer.

The objective of load dispatch centre:

1) It provides system security

2) Islanding facility

3) Optimum use of resources

4) Load forecasting and demand estimation

5) Maintain power quality of power supply which is transmitted through the regional grid.

6) Regulating the system frequency

7) Help to quickly restore the system after any disturbances

8) Reliable operation of the transmission system

9) Matching the power generation to the power demand

10) Communication and SCADA management

11) Responsible for carrying out the real-time operation of the grid with same as the grid standard and the grid code.

12) Analysis of tripping and disturbances

13) Ensures the stability of the power system

14) Supervision and control over the inter-regional links

15) Safety of equipment

16) Outage planning and monitoring

17) Load shedding implementation

18) Reactive power management and voltage control

19) Monitor bilateral power supply agreement

If we consider the Indian power system network, there is one National Load Dispatch Centre (NLDC) and five Regional Load Dispatch Centre (RLDC).

1) National Load Dispatch Centre (NLDC)

2) Regional Load Dispatch Centre (RLDC)

      - Northern Regional Load Dispatch Centre (NRLDC)

      - Southern Regional Load Dispatch Centre (SRLDC)

      - Western Regional Load Dispatch Centre (WRLDC)

      - Eastern Regional Load Dispatch Centre (ERLDC)

      - North-Eastern Regional Load Dispatch Centre (NWRLDC)

3) State Load Dispatch Centre (SLDC)

4) Area Load Dispatch Centre (ALDC)

5) Remote Terminal Unit (RTU)

There are one NLDC is placed in the capital of India and that is Delhi. The NLDC is main LDC and monitors all five RLDC. These RLDC works under the observation of the NLDC. The NRLDC is placed in Delhi, SRLDC is placed in Bangalore, WRLDC is placed in Mumbai, ERLDC is placed in Kolkata and NWRLDC is placed in Shillong.

The SLDC (state load dispatch centres) are placed in all states of the country. The SLDC works under observation of the RLDC. The ALDC works under observation of the SLDC and RTU work under the observation of the ALDC. This is the hierarchy of the LDC.