ExcDC2A
Class Description
Modified IEEE DC2A direct current commutator exciter with speed input, one more leg block in feedback loop and without underexcitation limiters (UEL) inputs. DC type 2 excitation system model with added speed multiplier, added lead-lag, and voltage-dependent limits.
Attributes
| Name | Type | Description |
|---|---|---|
| efd1 | PU | Exciter voltage at which exciter saturation is defined (<i>Efd</i><i><sub>1</sub></i>) (> 0). Typical value = 3,05. |
| efd2 | PU | Exciter voltage at which exciter saturation is defined (<i>Efd</i><i><sub>2</sub></i>) (> 0). Typical value = 2,29. |
| exclim | Boolean | (<i>exclim</i>). IEEE standard is ambiguous about lower limit on exciter output. true = a lower limit of zero is applied to integrator output false = a lower limit of zero is not applied to integrator output. Typical value = true. |
| ka | PU | Voltage regulator gain (<i>Ka</i>) (> 0). Typical value = 300. |
| ke | PU | Exciter constant related to self-excited field (<i>Ke</i>). If <i>Ke</i> is entered as zero, the model calculates an effective value of <i>Ke</i> such that the initial condition value of <i>Vr</i> is zero. The zero value of <i>Ke</i> is not changed. If <i>Ke</i> is entered as non-zero, its value is used directly, without change. Typical value = 1. |
| kf | PU | Excitation control system stabilizer gain (<i>Kf</i>) (>= 0). Typical value = 0,1. |
| ks | PU | Coefficient to allow different usage of the model-speed coefficient (<i>Ks</i>). Typical value = 0. |
| seefd1 | Float | Exciter saturation function value at the corresponding exciter voltage, <i>Efd</i><i><sub>1</sub></i> (<i>Se[Efd</i><i><sub>1</sub></i><i>]</i>) (>= 0). Typical value = 0,279. |
| seefd2 | Float | Exciter saturation function value at the corresponding exciter voltage, <i>Efd</i><i><sub>2</sub></i> (<i>Se[Efd</i><i><sub>2</sub></i><i>]</i>) (>= 0). Typical value = 0,117. |
| ta | Seconds | Voltage regulator time constant (<i>Ta</i>) (> 0). Typical value = 0,01. |
| tb | Seconds | Voltage regulator time constant (<i>Tb</i>) (>= 0). Typical value = 0. |
| tc | Seconds | Voltage regulator time constant (<i>Tc</i>) (>= 0). Typical value = 0. |
| te | Seconds | Exciter time constant, integration rate associated with exciter control (<i>Te</i>) (> 0). Typical value = 1,33. |
| tf | Seconds | Excitation control system stabilizer time constant (<i>Tf</i>) (> 0). Typical value = 0,675. |
| tf1 | Seconds | Excitation control system stabilizer time constant (<i>Tf1</i>) (>= 0). Typical value = 0. |
| vrmax | PU | Maximum voltage regulator output (<i>Vrmax</i>) (> ExcDC2A.vrmin). Typical value = 4,95. |
| vrmin | PU | Minimum voltage regulator output (<i>Vrmin</i>) (< 0 and < ExcDC2A.vrmax). Typical value = -4,9. |
| vtlim | Boolean | (<i>Vtlim</i>). true = limiter at the block (<i>Ka / [1 + sTa]</i>) is dependent on <i>Vt </i> false = limiter at the block is not dependent on <i>Vt</i>. Typical value = true. |
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