Load Characteristic Model: WSCC
AutoCorrection Properties
To be documented.
Model Equations and/or Block Diagrams
Model supported by PSLF
Parameters:
| p1 | Constant impedance fraction in p.u. |
| q1 | Constant impedance fraction in p.u. |
| p2 | Constant current fraction in p.u. |
| q2 | Constant current fraction in p.u. |
| p3 | Constant power fraction in p.u. |
| q3 | Constant power fraction in p.u. |
| p4 | Frequency dependent power fraction in p.u. |
| q4 | Frequency dependent power fraction in p.u. |
| lpd | Real power frequency index in p.u. |
| lqd | Reactive power frequency index in p.u. |
If p4 OR q4 are non-zero then
P=P_o [p_1 V^2+p_2 V+p_3+p_4 (1+lpd(freqpu-1))]
Q=Q_o [q_1 V^2+q_2 V+q_3+q_4 (1+lpq(freqpu-1))]
else
P=P_o [p_1 V^2+p_2 V+p_3 ][1+lpd(freqpu-1)]
Q=Q_o [q_1 V^2+q_2 V+q_3 ][1+lpq(freqpu-1)]
V= per unit voltage magnitude at the terminal bus
freqpu = per unit bus frequency at the terminal bus
P_o and Q_o are calculated during initialization to match the initial conditions