Exciter Messages

Exciter Max Limit Messages

"Simple Exciter on Max Limit."

"IEEET1 AVR on Max Limit."

"IEEET2 AVR on Max Limit."

"IEEE AC6A on AVR Max Limit."

"IEEE AC6A on Regulator Max Limit."

"IEEE AC1A on AVR Max Limit."

"IEEE AC1A on Regulator Max Limit."

"IEEE AC8B on AVR Max Limit."

"IEEE AC8B on Exciter Output Max Limit."

Description - At Initialization, these exciter models trigger the messages noted when on a maximum limit either in the AVR or the output of the exciter. This is typically caused by over-exciting the generator past the model settings, or by having an unreasonable limit specified in the exciter model.

Fix - Try reducing generator var export (in the power flow case, lower control voltage for a PV or Swing generator, or reduce Q for a PQG) or changing the limit (make it larger).

Exciter Min Limit Messages

"Simple Exciter on Min Limit."

"IEEET1 AVR on Min Limit."

"IEEET2 AVR on Min Limit."

"IEEE_AC1A on Neg EFD Output Limit."

"IEEE_AC1A on AVR Min Limit."

"IEEE_AC1A on Regulator Min Limit."

"IEEE_AC6A on Neg EFD Output Limit."

"IEEE_AC6A on AVR Min Limit."

"IEEE_AC6A on Regulator Min Limit."

"IEEE_AC8B on AVR Min Limit."

"IEEE_AC8B on Exciter Output Min Limit."

Description - At Initialization, these exciter models trigger the messages noted when on a minimum limit, either in the AVR section or the exciter section. This is typically caused by under-exciting the generator past the model settings, or by having an unreasonable limit specified in the exciter model.

Fix - Try reducing generator var import (in the power flow case, raise control voltage for a PV or Swing generator, or increase Q for a PQG) or changing the limit (make it smaller or more negative).

Exciter Gate Limit Messages

"IEEE_AC1A on OEL Low Value Gate Limit."

"IEEE_AC1A on UEL High Value Gate Limit."

Description - At Initialization, these exciter models trigger the messages noted when on a low or high gate limit in the Over and Under Excitation Limiter inputs (OEL, UEL). This is typically caused by an out of range var expectation on the generator, or an incorrect value set for the OEL and UEL.

Fix - Try modifying generator var import/export (in the power flow case, change control voltage for a PV or Swing generator, or change Q for a PQG) or changing the limit.

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