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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…
The voltage dependence is defined in the load type (TypLod). Therefore a load type has to be defined in a first step. In its Load Flow tab, the voltage dependence can be configured for active and…
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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),…
PowerFactory offers intrinsic DSL 2-dimensional approximation functions: lapprox2 and sapprox2. The attached project contains two DSL models for these two functions. The Common Models is stored inside…
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To simulate a load event you have to use the EvtLod. The load event works as follows:1. Incremental change Certain percentage of current value, P = P + P*dP/100 (same for Q)2. Absolute change Absolute…
A static load model is always equivalent to a constant impedance model. For modelling any different characteristic, you have to switch it over to 100 percent dynamic. A real constant PQ load model can…
PowerFactory provides a built-in functionality to adapt the power of selected loads to result in the measured values at the beginning of a feeder. Using the attached example, the following steps…
The example attached includes a measurement file drive in a 3-phase load. Import the project, save the data file loadmeas.txt to the hard disk and select this file in the measurement file object of…
PowerFactory provides the toolbox Quasi-dynamic Simulation to calculate a set of load flow calculations considering defined time characteristics.Almost for every element parameter, characteristics can…
In the attached example a random signal is generated using the sample and hold noise generator (ElmNoise) within a DSL model. The generated random signal is defined to change every 1/Frequency…