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UnderexcLimIEEE2

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)).

Inheritance

Attributes

LabelTypeMultiplicityComment
k1Float1..1UEL terminal voltage exponent applied to real power input to UEL limit look-up table (k1). Typical value = 2.
k2Float1..1UEL terminal voltage exponent applied to reactive power output from UEL limit look-up table (k2). Typical value = 2.
kfbFloat1..1Gain associated with optional integrator feedback input signal to UEL (KFB). Typical value = 0.
kufFloat1..1UEL excitation system stabilizer gain (KUF). Typical value = 0.
kuiFloat1..1UEL integral gain (KUI). Typical value = 0,5.
kulFloat1..1UEL proportional gain (KUL). Typical value = 0,8.
p0Float1..1Real power values for endpoints (P0). Typical value = 0.
p1Float1..1Real power values for endpoints (P1). Typical value = 0,3.
p10Float1..1Real power values for endpoints (P10).
p2Float1..1Real power values for endpoints (P2). Typical value = 0,6.
p3Float1..1Real power values for endpoints (P3). Typical value = 0,9.
p4Float1..1Real power values for endpoints (P4). Typical value = 1,02.
p5Float1..1Real power values for endpoints (P5).
p6Float1..1Real power values for endpoints (P6).
p7Float1..1Real power values for endpoints (P7).
p8Float1..1Real power values for endpoints (P8).
p9Float1..1Real power values for endpoints (P9).
q0Float1..1Reactive power values for endpoints (Q0). Typical value = -0,31.
q1Float1..1Reactive power values for endpoints (Q1). Typical value = -0,31.
q10Float1..1Reactive power values for endpoints (Q10).
q2Float1..1Reactive power values for endpoints (Q2). Typical value = -0,28.
q3Float1..1Reactive power values for endpoints (Q3). Typical value = -0,21.
q4Float1..1Reactive power values for endpoints (Q4). Typical value = 0.
q5Float1..1Reactive power values for endpoints (Q5).
q6Float1..1Reactive power values for endpoints (Q6).
q7Float1..1Reactive power values for endpoints (Q7).
q8Float1..1Reactive power values for endpoints (Q8).
q9Float1..1Reactive power values for endpoints (Q9).
tu1Float1..1UEL lead time constant (TU1) (>= 0). Typical value = 0.
tu2Float1..1UEL lag time constant (TU2) (>= 0). Typical value = 0.
tu3Float1..1UEL lead time constant (TU3) (>= 0). Typical value = 0.
tu4Float1..1UEL lag time constant (TU4) (>= 0). Typical value = 0.
tulFloat1..1Time constant associated with optional integrator feedback input signal to UEL (TUL) (>= 0). Typical value = 0.
tupFloat1..1Real power filter time constant (TUP) (>= 0). Typical value = 5.
tuqFloat1..1Reactive power filter time constant (TUQ) (>= 0). Typical value = 0.
tuvFloat1..1Voltage filter time constant (TUV) (>= 0). Typical value = 5.
vuimaxFloat1..1UEL integrator output maximum limit (VUIMAX) (> UnderexcLimIEEE2.vuimin). Typical value = 0,25.
vuiminFloat1..1UEL integrator output minimum limit (VUIMIN) (< UnderexcLimIEEE2.vuimax). Typical value = 0.
vulmaxFloat1..1UEL output maximum limit (VULMAX) (> UnderexcLimIEEE2.vulmin). Typical value = 0,25.
vulminFloat1..1UEL output minimum limit (VULMIN) (< UnderexcLimIEEE2.vulmax). Typical value = 0.