Asymmetric Load
Note
Loads should always have a positive p_mw value, since all power values are given in the consumer system. If you want to model constant generation, use a Static Generator (asymmetric_sgen element) instead of a negative load.
See also
Create Function
Input Parameters
net.asymmetric_load
Parameter |
Datatype |
Value Range |
Explanation |
name |
string |
name of the load |
|
bus * |
integer |
index of connected bus |
|
p_a_mw* |
float |
\(\geq 0\) |
Phase A active power of the load [MW] |
p_b_mw* |
float |
\(\geq 0\) |
Phase B active power of the load [MW] |
p_c_mw* |
float |
\(\geq 0\) |
Phase C active power of the load [MW] |
q_a_mvar* |
float |
Phase A reactive power of the load [MVar] |
|
q_b_mvar* |
float |
Phase B reactive power of the load [MVar] |
|
q_c_mvar* |
float |
Phase C reactive power of the load [MVar] |
|
sn_mva |
float |
\(>0\) |
rated power of the load [MVA] |
scaling * |
float |
\(\geq 0\) |
scaling factor for active and reactive power |
in_service* |
boolean |
True / False |
specifies if the load is in service. |
type* |
String |
wye/delta |
Connection Type of 3 Phase Load (wye/delta connected) |
*necessary for executing a power flow calculation.
Note
The apparent power value sn_mva is provided as additional information for usage in controller or other applications based on panadapower. It is not considered in the power flow!
‘wye’ is the same as PH-E loads
For ‘delta’ loads line-earth voltages and powers are converted to line-line values
Electric Model
Loads are modelled as PQ-buses in the power flow calculation.
Wye Load
Delta Load
Even though power values are entered as Line-ground \(P_{a},Q_{a}\), for delta loads, Power values are actually line-line powers i.e. \(P_{ab},Q_{ab}\)
So, in the algorithm :
Line-ground voltages \(V_{a}\) are converted to line-line voltages \(V_{ab}\). Line-Line currents are then converted to Line-ground currents \(I_{a}\).
\(I_{a}= T. \frac{S_{ab}}{(V_{an}-V_{bn})}\)
\(I_{b}= T. \frac{S_{bc}}{(V_{bn}-V_{cn})}\)
\(I_{c}= T. \frac{S_{ca}}{(V_{cn}-V_{an})}\)
Where
Result Parameters
net.res_asymmetric_load
Parameter |
Datatype |
Explanation |
p_a_mw |
float |
resulting Phase A active power demand after scaling and after considering voltage dependence [MW] |
q_a_mvar |
float |
resulting Phase A reactive power demand after scaling and after considering voltage dependence [MVar] |
p_b_mw |
float |
resulting Phase B active power demand after scaling and after considering voltage dependence [MW] |
q_b_mvar |
float |
resulting Phase B reactive power demand after scaling and after considering voltage dependence [MVar] |
p_c_mw |
float |
resulting Phase C active power demand after scaling and after considering voltage dependence [MW] |
q_c_mvar |
float |
resulting Phase C reactive power demand after scaling and after considering voltage dependence [MVar] |