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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This also means that the operational configuration defined for the load flow calculation e. A parameter event allows us to change the value of any signal or variable in an element or DSL model during a time-domain simulation. The expression Tdelay must evaluate to a time indepen- dent constant and may therefore only consist of constants and parameter variables. The user must define what type of object the slot represents.

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Note that as mentioned earlier, there is already a built-in model for the synchronous generator element and therefore does not require an additional definition. Afterwards, some more general rules are articulated for composite block initial- isation.

As a result of this function, all graphical representations of the block definition are deleted. Consider the hydroelectric generation system shown in Figure 2. This becomes an issue when exporting the model and importing it to different PowerFactory databases.

A common model inherits the block diagram of the linked model definition, but has its own local parameter settings. This is generally for variables or signals that cannot be determined directly from the load flow solution.

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Undefined variables or signals need to be manually initialised, for example: Frames are type objects that belong in the equipment type library. There are type objects in the library i. The following subsections describe the three ways to see model signals and variables that are available in PowerFactory. In the hydro turbine example, we saw digsolent the turbine slot was connected to the syn- chronous machine and governor slots.

Common models are created from within a data manager e. We can create a new common model based digislent the AVK block diagram and replace the Basler controller in the composite model all the while using the same composite model and frame.

The model will initialise, but will not function correctly. Block definition for a hydro turbine Figure 4. The gate position is controlled by a governor system, which tries to keep the output of the generator at a constant frequency.

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This block diagram represents the model definition for the voltage controller. PowerFactory does not check the initial conditions for a macro since they are assumed to be defined elsewhere i. This can typically be done with the disgilent and incfix statements. The blocks that represent the generator, governor, etc are called slots and are digsilennt for the models that describe their dynamic behaviour.

Pm, dU, U, etc. Automatic calculation of initial conditions option in block definition The feature is located in the block definition dialog see Figure 4.

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Note that not all of the variables and signals in a model need to be manually initialised. Construct a steady-state representation of the block diagram Set all derivatives to zero and redraw the block to show its powerfacgory configuration.

For example, Figure 5. We also look inside the block definition and identify all the state variables which all require manual initialisation. Step response of first-order lag Figure 4.

Enter the email address you signed up with and we’ll email you a reset link. The external event must be stored locally in the DSL model.

Power System Software & Engineering

The relevant system components, e. The event is then applied to the element assigned to that slot. This can be a difficult bug to find, so take care of the naming in model definitions and frames.

A composite frame contains the definitions of each slot, indicating the type of object that should be assigned to the slot. Frame showing a governor and turbine connected to a synchronous generator The initialisation process starts at the synchronous generator element, a grid element with a built-in model.

However at this stage, xigsilent only have blueprints for the system which are located in the library.