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There are two ways to calculate this kind of fault: Use a 4-wire model in which the N-conductor is explicitly modelled and the PE-wire is reduced and modelled as earth. Then when calculate a phase to…
The calculation results for the admissible thermal equivalent short-circuit current are the following values:- Ithr: rated thermal Short-Circuit current with respect to 1 second (entered in the type…
The new VDE/IEC standard distinguishes between low-voltage networks with 6% and 10% of voltage tolerance.For networks with a tolerance of 6% cmin and cmax are set according with IEC 60909-0:2001 Page…
According to VDE/IEC in standard system fed directly from generators without transformer units, the impedance defined in following equation has to be used. Z_G = K_G x (R_G + j X_d") With the…
PowerFactory allows to calculate faults between lines at different voltages, that means in general faults between different circuit phases through a definition of a "Intercircuit Fault".To do it,…
An UPFC (Unified Power Flow Controller) is a FACTS (Flexible AC Transmission System) device, which consists of two VSCs (Voltage-Sourced Converters). The VSCs are interconnected with each other on…
With the short-circuit sweep command it is possible to calculate Short-Circuits along a path.Therefore it is necessary to define a Path (SetPath) and a Short-Circuit Sweep command (ComShcsweep) along…
When entering the data for an external network you should firstly be aware of the meaning of Minimum and Maximum current calculations.The Data for the external grid comprise: The fault level may be…
To change the tap position of a 3-winding transformer during a simulation define a parameter event (EvtParam) using the appropriate variable: e:nntap_int_h which corresponds to the tap-position HV…
This can be defined in the load-flow page of the transformer. The attached example shows how to use a phase-shift transformer to control the active power shared between several transformers…