Running a Short-Circuit Calculation
The short circuit calculation is carried out with the calc_sc function:
- pandapower.shortcircuit.calc_sc(net, bus=None, fault='3ph', case='max', lv_tol_percent=10, topology='auto', ip=False, ith=False, tk_s=1.0, kappa_method='C', r_fault_ohm=0.0, x_fault_ohm=0.0, branch_results=False, check_connectivity=True, return_all_currents=False, inverse_y=True, use_pre_fault_voltage=False)
Calculates minimal or maximal symmetrical short-circuit currents. The calculation is based on the method of the equivalent voltage source according to DIN/IEC EN 60909. The initial short-circuit alternating current ikss is the basis of the short-circuit calculation and is therefore always calculated. Other short-circuit currents can be calculated from ikss with the conversion factors defined in DIN/IEC EN 60909.
The output is stored in the net.res_bus_sc table as a short_circuit current for each bus.
- INPUT:
net (pandapowerNet) pandapower Network
bus (int, list, np.array, None) defines if short-circuit calculations should only be calculated for defined bus
*fault (str, 3ph) type of fault
“3ph” for three-phase
“2ph” for two-phase (phase-to-phase) short-circuits
“1ph” for single-phase-to-ground faults
case (str, “max”)
“max” for maximal current calculation
“min” for minimal current calculation
lv_tol_percent (int, 10) voltage tolerance in low voltage grids
6 for 6% voltage tolerance
10 for 10% voltage olerance
ip (bool, False) if True, calculate aperiodic short-circuit current
ith (bool, False) if True, calculate equivalent thermical short-circuit current Ith
topology (str, “auto”) define option for meshing (only relevant for ip and ith)
“meshed” - it is assumed all buses are supplied over multiple paths
“radial” - it is assumed all buses are supplied over exactly one path
“auto” - topology check for each bus is performed to see if it is supplied over multiple paths
tk_s (float, 1) failure clearing time in seconds (only relevant for ith)
r_fault_ohm (float, 0) fault resistance in Ohm
x_fault_ohm (float, 0) fault reactance in Ohm
branch_results (bool, False) defines if short-circuit results should also be generated for branches
return_all_currents (bool, False) applies only if branch_results=True, if True short-circuit currents for each (branch, bus) tuple is returned otherwise only the max/min is returned
inverse_y (bool, True) defines if complete inverse should be used instead of LU factorization, factorization version is in experiment which should be faster and memory efficienter
use_pre_fault_voltage (bool, False) whether to consider the pre-fault grid state (superposition method, “Type C”)
OUTPUT:
- EXAMPLE:
calc_sc(net)
print(net.res_bus_sc)
import pandapower.shortcircuit as sc
import pandapower.networks as nw
net = nw.mv_oberrhein()
net.ext_grid["s_sc_min_mva"] = 100
net.ext_grid["rx_min"] = 0.1
net.line["endtemp_degree"] = 20
sc.calc_sc(net, case="min")
print(net.res_bus_sc)