ExcIEEEAC2A
Class Description
IEEE 421.5-2005 type AC2A model. The model represents a high initial response field-controlled alternator-rectifier excitation system. The alternator main exciter is used with non-controlled rectifiers. The type AC2A model is similar to that of type AC1A except for the inclusion of exciter time constant compensation and exciter field current limiting elements. Reference: IEEE 421.5-2005, 6.2.
Attributes
| Name | Type | Description |
|---|---|---|
| ka | PU | Voltage regulator gain (<i>K</i><i><sub>A</sub></i>) (> 0). Typical value = 400. |
| kb | PU | Second stage regulator gain (<i>K</i><i><sub>B</sub></i>) (> 0). Typical value = 25. |
| kc | PU | Rectifier loading factor proportional to commutating reactance (<i>K</i><i><sub>C</sub></i>) (>= 0). Typical value = 0,28. |
| kd | PU | Demagnetizing factor, a function of exciter alternator reactances (<i>K</i><i><sub>D</sub></i>) (>= 0). Typical value = 0,35. |
| ke | PU | Exciter constant related to self-excited field (<i>K</i><i><sub>E</sub></i>) (>= 0). Typical value = 1. |
| kf | PU | Excitation control system stabilizer gains (<i>K</i><i><sub>F</sub></i>) (>= 0). Typical value = 0,03. |
| kh | PU | Exciter field current feedback gain (<i>K</i><i><sub>H</sub></i>) (>= 0). Typical value = 1. |
| seve1 | Float | Exciter saturation function value at the corresponding exciter voltage, <i>V</i><i><sub>E1</sub></i>, back of commutating reactance (<i>S</i><i><sub>E</sub></i><i>[V</i><i><sub>E1</sub></i><i>]</i>) (>= 0). Typical value = 0,037. |
| seve2 | Float | Exciter saturation function value at the corresponding exciter voltage, <i>V</i><i><sub>E2</sub></i>, back of commutating reactance (<i>S</i><i><sub>E</sub></i><i>[V</i><i><sub>E2</sub></i><i>]</i>) (>= 0). Typical value = 0,012. |
| ta | Seconds | Voltage regulator time constant (<i>T</i><i><sub>A</sub></i>) (> 0). Typical value = 0,02. |
| tb | Seconds | Voltage regulator time constant (<i>T</i><i><sub>B</sub></i>) (>= 0). Typical value = 0. |
| tc | Seconds | Voltage regulator time constant (<i>T</i><i><sub>C</sub></i>) (>= 0). Typical value = 0. |
| te | Seconds | Exciter time constant, integration rate associated with exciter control (<i>T</i><i><sub>E</sub></i>) (> 0). Typical value = 0,6. |
| tf | Seconds | Excitation control system stabilizer time constant (<i>T</i><i><sub>F</sub></i>) (> 0). Typical value = 1. |
| vamax | PU | Maximum voltage regulator output (<i>V</i><i><sub>AMAX</sub></i>) (> 0). Typical value = 8. |
| vamin | PU | Minimum voltage regulator output (<i>V</i><i><sub>AMIN</sub></i>) (< 0). Typical value = -8. |
| ve1 | PU | Exciter alternator output voltages back of commutating reactance at which saturation is defined (<i>V</i><i><sub>E1</sub></i>) (> 0). Typical value = 4,4. |
| ve2 | PU | Exciter alternator output voltages back of commutating reactance at which saturation is defined (<i>V</i><i><sub>E2</sub></i>) (> 0). Typical value = 3,3. |
| vfemax | PU | Exciter field current limit reference (<i>V</i><i><sub>FEMAX</sub></i>) (> 0). Typical value = 4,4. |
| vrmax | PU | Maximum voltage regulator outputs (<i>V</i><i><sub>RMAX</sub></i>) (> 0). Typical value = 105. |
| vrmin | PU | Minimum voltage regulator outputs (<i>V</i><i><sub>RMIN</sub></i>) (< 0). Typical value = -95. |
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