Excitation Systems

Main Types of Excitation Systems

1. Self –excited shunt system
2. Self-excited compound system
3. Separately –excited station power source system
4. Separately-excited brushless generator system

The self-excited shunt system has been adopted in a great number of hydro power plants for its inexpensive cost and easy maintenance. Based on the studies, the static system is recommended as follows:
a. Input power source for static exciter is self-excited shunt system
b. Connection scheme of thyristor is applied to be the full bridge system

In case of self-excited shunt system is applied, an initial excitation power source must be separately provided to build-up the generator voltage up to a certain voltage at which AVR and thyristor gate circuits are adequately activated.

More detail on Excitation Systems
 
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