Power System Operation and Control

12

Modeling of Speed Governing and Excitation Systems

OBJECTIVES

After reading this chapter, you should be able to:

• develop the modeling of speed-governor systems for steam and hydraulic turbines

• develop the modeling of speed-governor systems with limiters

• study the effect of excitation variation on synchronous machines

• discuss the methods of providing excitation of synchronous machines

• study the structure of a general excitation system

• develop the transfer functions of various components of an excitation system

12.1 INTRODUCTION

Two important control loops are needed for the economic and reliable operation of a power system. They are:

1. Load frequency control (LFC) loop (p.f. control loop) for the regulation of system frequency.
2. Automatic ...