UnderexcLimIEEE2

Class Description

Type UEL2 underexcitation limiter which has either a straight-line or multi-segment characteristic when plotted in terms of machine reactive power output vs. real power output.
Reference: IEEE UEL2 421.5-2005, 10.2 (limit characteristic lookup table shown in Figure 10.4 (p 32)).

Attributes

Name Type Description
q6 PU Reactive power values for endpoints (Q6).
q7 PU Reactive power values for endpoints (Q7).
q8 PU Reactive power values for endpoints (Q8).
q9 PU Reactive power values for endpoints (Q9).
tu1 Seconds UEL lead time constant (TU1) (>= 0). Typical value = 0.
tu2 Seconds UEL lag time constant (TU2) (>= 0). Typical value = 0.
tu3 Seconds UEL lead time constant (TU3) (>= 0). Typical value = 0.
tu4 Seconds UEL lag time constant (TU4) (>= 0). Typical value = 0.
tul Seconds Time constant associated with optional integrator feedback input signal to UEL (TUL) (>= 0). Typical value = 0.
tup Seconds Real power filter time constant (TUP) (>= 0). Typical value = 5.
tuq Seconds Reactive power filter time constant (TUQ) (>= 0). Typical value = 0.
tuv Seconds Voltage filter time constant (TUV) (>= 0). Typical value = 5.
vuimax PU UEL integrator output maximum limit (VUIMAX) (> UnderexcLimIEEE2.vuimin). Typical value = 0,25.
vuimin PU UEL integrator output minimum limit (VUIMIN) (< UnderexcLimIEEE2.vuimax). Typical value = 0.
vulmax PU UEL output maximum limit (VULMAX) (> UnderexcLimIEEE2.vulmin). Typical value = 0,25.
vulmin PU UEL output minimum limit (VULMIN) (< UnderexcLimIEEE2.vulmax). Typical value = 0.
k1 Float UEL terminal voltage exponent applied to real power input to UEL limit look-up table (k1). Typical value = 2.
k2 Float UEL terminal voltage exponent applied to reactive power output from UEL limit look-up table (k2). Typical value = 2.
kfb PU Gain associated with optional integrator feedback input signal to UEL (KFB). Typical value = 0.
kuf PU UEL excitation system stabilizer gain (KUF). Typical value = 0.
kui PU UEL integral gain (KUI). Typical value = 0,5.
kul PU UEL proportional gain (KUL). Typical value = 0,8.
p0 PU Real power values for endpoints (P0). Typical value = 0.
p1 PU Real power values for endpoints (P1). Typical value = 0,3.
p10 PU Real power values for endpoints (P10).
p2 PU Real power values for endpoints (P2). Typical value = 0,6.
p3 PU Real power values for endpoints (P3). Typical value = 0,9.
p4 PU Real power values for endpoints (P4). Typical value = 1,02.
p5 PU Real power values for endpoints (P5).
p6 PU Real power values for endpoints (P6).
p7 PU Real power values for endpoints (P7).
p8 PU Real power values for endpoints (P8).
p9 PU Real power values for endpoints (P9).
q0 PU Reactive power values for endpoints (Q0). Typical value = -0,31.
q1 PU Reactive power values for endpoints (Q1). Typical value = -0,31.
q10 PU Reactive power values for endpoints (Q10).
q2 PU Reactive power values for endpoints (Q2). Typical value = -0,28.
q3 PU Reactive power values for endpoints (Q3). Typical value = -0,21.
q4 PU Reactive power values for endpoints (Q4). Typical value = 0.
q5 PU Reactive power values for endpoints (Q5).

Relationships

Inherits from

Descendant classes

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Leaf/Root class

IsLeaf IsRoot
False False

Associations

None