Page 6 - IGMC-2017

Functions and Processes

Inherent dynamic nature of bulk electric power system and probable system states (Fig. 1), from
operations point of view, justifies the necessity for adaptation of a suitable “Functional Model”,
(Fig. 2). The “Functional Model” reflects the continuous and recursive nature of processes in
operational planning and control.

Based on this “Functional Model”, activities and processes can be categorized as:
• Proactive
• Preventative, and
• Reactive
The overall goals are to ensure:
• Balanced Generation-Demand supply under normal conditions (Frequency control)
• Adequate reserve capacity (generation and transmission) to meet changes in load demand,
availability of generation capacity, etc.
• Preserving system stability under normal and emergency conditions
• Acceptable voltage levels throughout the transmission network
• Integrity of the power system, following any credible event/disturbance (risk management)
From time domain perspective, operational planning and control processes are divided into:
• Pre-dispatch or Scheduling processes/activities
• Monitoring and Control (on-line real-time dispatching) processes/activities

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