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Description
This is a general model of a static excitation system representing a Silicon-Controlled Rectifier. The exciter may be bus fed or solid fed. The model was described in [1] as part of study for load rejection over-voltages. The SCRX component was developed in line with the references [1] [2].
Mask and Parameters
Exciter Parameters
Expanding the "SCRX diagram" displays the block diagram in the parameters window.
Name | Description | Unit | Variable = {Possible Values} |
Ta_Tb | Gain reduction ratio Ta/Tb | - | - |
Tb | Time constant | s | - |
K | Exciter gain | - | - |
Te | Time constant | s | - |
Emax | Maximum field voltage output | pu | - |
Emin | Minimum field voltage output | pu | - |
Cswitch | Voltage source switch – Bus fed = 0, Solid fed = 1. | - | [0, 1] |
Rc_Rfd | Ratio of the crowbar resistance to field winding resistance Rc/Rfd | - | - |
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Name | Description | Unit |
Efd | Exciter output voltage | pu |
References
1. F.P. de Mello, L. M. Leuzinger and R. J. Mills, "Load rejection overvoltages as affected by excitation system control," in IEEE Transactions on Power Apparatus and Systems, vol. 94, no. 2, pp. 280-287, March 1975, doi: 10.1109/T-PAS.1975.31853.
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