Shunt ImpedanceΒΆ
The ShuntImpedance components attach to a single bus and have a
voltage-dependent admittance. For shunt impedances the power consumption is
given by \(s_i = |V_i|^2 y_i^*\) so that \(p_i + j q_i = |V_i|^2 (g_i -jb_i)\).
However the p and q below are defined directly proportional to g and b
with \(p = |V|^2g\) and \(q = |V|^2b\), thus if \(p>0\) the shunt impedance is
consuming active power from the bus and if \(q>0\) it is supplying reactive power
(i.e. behaving like an capacitor).
Note
Shunt impedances are only used in power flow calculations (n.pf()), not in any of the optimisation problems (n.optimize()).
| attribute | type | unit | default | description | status |
|---|---|---|---|---|---|
| name | string | nan | nan | Unique name | Input (required) |
| bus | string | nan | nan | Name of bus to which shunt impedance is attached. | Input (required) |
| g | float | Siemens | 0. | Shunt conductivity. | Input (optional) |
| b | float | Siemens | 0. | Shunt susceptance. | Input (optional) |
| sign | float | nan | -1. | Power sign (sign convention so that g>0 withdraws p from bus) |
Input (optional) |
| p | series | MW | 0. | Active power at bus (positive if net load) | Output |
| q | series | MVar | 0. | Reactive power (positive if net generation) | Output |
| g_pu | float | per unit | 0. | Calculated from g and n.buses.v_nom |
Output |
| b_pu | float | per unit | 0. | Calculated from b and n.buses.v_nom |
Output |
| active | boolean | nan | True | Whether to consider the component as active component or not | Input (optional) |