DIgSILENT

Knowledge base

Show filter optionsHide filter options
Your search returned 320 items.

How can I adjust the tap positions of a 3-winding transformer during the simulation?

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…

How can I model a transformer with phase-shift tap changing to control active power flow?

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…

Where can I find a TCR (Thyristor Controlled Reactor) for Load-flow and EMT simulations?

The best option is to model the TCR using a SVC model and setting the number of capacitors to zero, as shown in attached example. In order to analyze the harmonic distortion of the current…

How can I model two transformers controlling the same busbar voltage?

This can be modelled using a master-slave mode available in PowerFactory. First of all, both transformers shall have a type which includes settings for the tap changer. In addition, the…

How can I model a 5-wire line system in PowerFactory ?

Attached you can find an example how to model a line type with 5 wires. The example includes one grid with a 4 wire line type and a separate PE line type, and another grid where the PE line…
Tags

How can I encrypt DSL models to protect these models against unauthorised access?

The encrypt module can be applied using the Pack -> Macro button followed by the Encrypt button in the block definition basic data page. The Pack -> Macro option copies all equations to the…
Tags

Is it possible to exchange signals between two composite models?

Yes, it is possible to exchange variables between two composite models in the same way as it is done between two common models. It is only necessary to set up a frame in which the two frames are…

Do you have an example about the event DSL function?

In the attached example a counter is implemented in DSL using the event function. This function creates in this case a parameter event over the same DSL model every time the input signal changes sign…
Tags

How are the load and no-load losses of the network components calculated?

1. Lines:• Losses = P(terminal i) + P(terminal j)• Losses (no load) = U(terminal i)2* B1/2 + U(terminal j)2* B1/2 ,(B1 line susceptance C1,G1 . . . )• Losses (load) = Losses - Losses(no load) 2.…

How can different balanced and unbalanced loads be modelled?

Attached you can find an example which includes four loads with a demand of 1 MW each. The way each load is modelled and connected to a three-phase system differs. Two loads are…
Tags