Practical Power Plant Engineering

19Power Dispatch and Control

CHAPTER MENU

• 19.1 Plant and System Operation
  • 19.1.1 Load Variability
  • 19.1.2 Plant Scheduling
• 19.2 Load – Frequency Control
  • 19.2.1 Moment of Inertia H
  • 19.2.2 Governor Control
  • 19.2.3 Deadband
  • 19.2.4 Speed Droop
  • 19.2.5 Generator Droop Control
  • 19.2.6 Generator Operation
• 19.3 Voltage Reactive Power Control
  • 19.3.1 AVR Droop Characteristic
  • 19.3.2 Generation Operation Modes, Reactive Power Sharing
• 19.4 Line Transfers, Import/Export Power
• References

19.1 Plant and System Operation

Power dispatch and generation control are some of the major daily activities in the power plant and system operation. It is important for young engineers to learn the basic concepts of the operation of power systems to be able to insert themselves into the ongoing conversations. There are two principal activities handled by dispatch centers responsible to operate the power system on a 24‐hour basis to generate, transmit, and deliver power to factories, residences, services, and roads on a timely, stable, and economic manner. These are

1. Load and frequency control – governor action
2. Reactive and voltage control – excitation action

Figure 19.1 Regional dispatch center.

19.1.1 Load Variability

Electricity is a unique commodity that must be produced at the instant it is needed. It cannot be economically stored in large quantities using today's technology. The electrical load ...