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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The level of detail required in the controller models will of course depend on the types of studies to be conducted, performance requirements, degree of influence the unit has on the network, etc.
The state variable x should therefore be initialised to zero. Two model definitions each referenced by one common model one-to-one ing the structure of a simplified generator control system, and how it can be implemented in PowerFactory.
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However, if the inc0 statement is used, then PowerFactory assumes that the signal is not connected and initialises it using the inc0 expression. Equations window of the block definition dialog box There are three statements available for setting initial conditions: PowerFactory offers two functions to make DSL models more portable for reuse: In this case, we can use an iterative search to calculate the initial condition for vw.
Suppose that this turbine block will be connected in the frame shown in Figure 4. In the hydro turbine example, we saw that the turbine slot was connected to the syn- chronous machine and governor slots. It is implemented in DSL using a state variable x as follows: In this system, the amount of water flowing into the penstock is controlled by a control gate at the intake.
In the end, the complete composite model is shown in Figure 2. An example of a composite model with elements assigned to slots Figure 3.
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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. Generator Control System The built-in synchronous machine model ElmSym is shipped by default without any controls. However, any internal state variables in the tutoriwl need to be manually initialised.
An understanding of numerical simulation, particularly the concepts of state-space representations and solutions to differential-algebraic equations DAE is also desirable, but not essential. For example, Figure 5. This steady state representation is shown digsilnt Figure 4. It digsikent therefore necessary to specifically define the generator controls and their dynamic response to system disturbances. 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.
For example, consider Figure 4. There are three iterative search algorithms available in PowerFactory: If there is a problem with one common model, try to put the common models that are tuyorial directly connected or related to the problem model out of service.
These grid elements inherit the properties of the type objects e. StationWare is a protection settings database and asset management system for all power system substation data. This is because powerfactpry outputs of the model are usually known e.
Test the complete model see Section 5. Firstly, the equation for pw must be rearranged so that it is evaluated in terms of vw: Step response of digsikent lag Figure 4.
Construct a composite frame showing how the slots are interconnected 3.
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Power System Stability and Control. If a block is drawn, the slot icon is automatically deactivated so that slots and blocks cannot be mixed up in the same diagram and vice versa if a slot is drawn first.
Type and element analogies To provide a more concrete example, consider the two diagrams in Figure 2. The inc0 statement is only exe- cuted if the signal is not connected and is typically used to test models in isolation or when the signal is not used, but needs to be initialised more on the use of inc0 in Section 5.
Power System Software & Engineering
As a result of this function, all graphical representations tktorial the block definition are deleted. 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. To illustrate how to use the internal division search function, we can apply it to the wind turbine example above.
Create each of the model definitions and set appropriate initial conditions see Section 4 4. The model will initialise, but will not function correctly.