DIgSILENT

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Your search returned 53 items.

How is the external grid modelled for RMS simulation?

It is modelled as a voltage source with an internal impedance. The mechanical equations are equivalent as those for the synchronous machine. The Acceleration Time Constant (in s) represents the…

How can I use DPL to execute a dynamic simulation and analyse results?

The attached project contains a DPL script located in the Scripts library. The script performs the following tasks: - Execute the "Calculation of Initial Conditions" and "Run Simulation" commands. -…

Do you have an example of a Unified Power Flow Controller (UPFC)?

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…

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…

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…

How can I model generation plants for own consumption to investigate compliance at the connection point according to VDEW?

Attached you can a PowerFactory project containing the investigation for VDEW compliance of an asynchronous generator (Example 1) and an inverter-fed synchronous machine (Example 2)…

Do you have an application example for a Battery Energy Storage System (BESS)?

A common application for BESS consists in replacing the spinning reserve/primary reserve in a power system. This application becomes significantly important in small or island power systems with…

Do you have a model for a STATCOM?

In the attached example, a 20Mvar STATCOM provides dynamic reactive power compensation for a set of motors connected to a weak network. The study case "Fault Stability Simulation (RMS)"…

Do you have some hints to correctly initialise a dynamic model?

The idea of the initialisation is to preset the internal model signals by the results of an initial load flow.The key point is to first check for each DSL-model, which inputs/outputs are known and…

What different options do I have to initialise a DSL model?

There are several possibilities to calculate the initial conditions. Consider the example y=a*u+b, where y is the output and u the input signal of the model. The initial value of y is known (=0),…