Load models with an optional input (if use_pq_in):
  pq:     {active, reactive} power
| Name | Description | 
|---|---|
| PQ steady-state load | |
| Impedance load, 3-phase dq0 | |
| PQ inductive load, 3-phase dq0 | |
| Admittance load, 3-phase dq0 | |
| PQ capacitive load, 3-phase dq0 | |
| ZIP inductive load, 3-phase dq0 | |
| Frequency inductive load, 3-phase dq0 | |
| Dynamic inductive load, 3-phase dq0 | |
| Partial models |