DIgSILENT PowerFactory Application Guide Dynamic Modelling Tutorial DIgSILENT Technical Documentation DIgSILENT GmbH Heinrich-Hertz-Str. 9 PowerFactory is easy to use and fully Windows compatible and can be integrated DIgSILENT YouTube channel; Interactive introductory tutorial and various. PowerFactory is a leading integrated power system analysis software, which covers the full range of functionality from standard features to highly sophisticated .

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Note that not all of the variables and signals in a model need to be manually initialised. A block powwrfactory can be assigned as a macro by ticking the macro checkbox in the block definition dialog. The difference is that composite frames can only contain slots and con- nectors, whereas model definitions can contain blocks, summation points, multipliers, etc but not slots.

For example, when creating a transformer, the user must create both a transformer type e. If any other name is given, the DSL interpreter checks the composite model where the present DSL model common model is used and powerfzctory for a slot with the given name.

General Software Information

An example of a composite frame for a synchronous generator Figure 3. Primitive blocks are often powerfzctory in other composite model definitions. Ticking the checkbox will activate the feature, however it requires some additional configuration to make it work properly. The blocks that represent the generator, governor, etc are called slots and are placeholders for the models that describe their dynamic behaviour. Stores the value x Tnow and returns the value x Tnow-Tdelay.

However, if the inc0 statement is used, then PowerFactory assumes that the signal is not connected and initialises it using the inc0 expression. Model definition for a simple voltage controller for the governor, turbine and voltage controller, the built-in model for the generator and how they are all connected together the composite frame.


A table of type versus element analogies are shown in Table 2. Whereas the block definition could be seen as the design or model for a piece of equipment, the common model can be seen as a specific physical instance of the equipment item itself e.

Actual numerical checks are not performed i. A model definition containing only equations is called a primitive block definition, while a model definition with a graphical block diagram is referred to as a composite block definition.

Instead of defin- ing the block diagram for each voltage controller individually, the PowerFactory philosophy is to define the Basler voltage controller once as a type model definition and then create two differ- ent instances common models for each of the generators each with their own local parameter settings.

Common models are grid elements that belong in the grid. The signals pt and speed are calculated automatically based on the tutorail state load flow solution and are known.

Lastfluss- und Kurzschlussberechnung mit PowerFactory S A common model thtorial the block diagram of the linked model definition, but has its own local parameter settings.

The relevant system components, e. The model will initialise, but will not function correctly. The input signal is a clock signal with the time period Tclock.

In poserfactory models, a number of variables or signals will need to be manually initialised. The step response of the integrator block is shown in Figure 4. We can redraw this block diagram for the steady state condition with all derivatives set to zero.

PowerFactory – DIgSILENT

The string format determines the details of the event call, and which of the three options above applies: Lastly, the incfix statement is only used for automatic calculation of initial conditions see Section 4. The slots for the generator, governor, turbine and voltage controller now need to be filled.


Tutoriao such cases, an iterative, numerical initialisation routine can be used. This block diagram represents the model definition for the voltage controller. As a result of this function, all graphical representations of the block definition are deleted. A composite frame contains the definitions of each slot, indicating the type of object that should be assigned to the slot. In the context of automatic initialisation, the inc statement simply initialises the variable with an estimated starting value which may or may not be right.

Therefore, to ttuorial this model we need to manually initialise vw. We can use the internal division search function to find the value of vw that will yield a value of pw closest to its initial value: Works only with fixed limits, i.

Power System Software & Engineering

However at this stage, we only have blueprints for the system which are located in the library. Suppose that this turbine block will be connected in the frame shown in Figure 4. A voltage controller is also connected to the generator, controlling the terminal voltage of the machine by regulating rotor excitation. For the generator slot, we can select the relevant generator element in the grid.

The iterative algorithm will determine the correct initial condition for the variable. This can typically be done with the inc and incfix statements. The incfix statement, on the other hand, defines a fixed initial condition for powerfacotry variable.

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