This exciter is based on an IEEE type SCRX solid state exciter. The output field voltage is varied by a control system to maintain the system voltage at Vref. Please note that this exciter model has no initialization capabilities - this means that it will respond to whatever inputs it receives regardless of the state of the machine model.
Inputs:
Vref: The reference voltage in per-unit, which the exciter acts to control.
If: The field current received from the machine in per-unit. It applies to the negative current logic. In the component input parameters, an option exists to enter a Reverse Resistance which is in effect inserted into the field circuit if negative field current attempts to flow. A large default value will prevent negative field current.
Vabc: Receives input from the Node Loop component. A Wire must connect the Vabc input to the Node Loop component.
Exst: Input to modify Vref and is suitable for connecting a power system stabilizer. This input is enabled only if the input parameter Extra Input Signal? is selected.
Outputs:
Ef: This output is the computed field voltage applied directly to synchronous machine. A Wire may be used to make the connection.
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