Steps to Running Dynamic Stability Simulations

1. Data: Enter dynamic stability data for various equipment such as motors, generators, contactors, ATS, transformers, and so on. You perform data entry in Database Edit focus just like you would enter any other equipment data. These equipment items have a tab called Stability, in which you can enter the dynamic stability data. The Database Technical Reference describes the fields available in these tabs in more detail. You can import generic data for the equipment from the library. However, equipment specific data, obtained through manufacturers or through tests, is preferred over generic data, for accuracy.
2. Define Plots: Define which variables you need to plot or create a spreadsheet for while you run simulations. For example, if you need to see the currents in a cable or the speed of the motor in rpm, you will have to specify this in the Define Plots dialog.
3. Create Scripts: You can create simulation scripts to record a series of commands or events. When a simulation is run using a script, all the events defined in the script are simulated. For example, if you want to run dynamic simulations for starting several motors in a sequence, you can specify at which point in time to energize each motor.
4. System Configuration: Prior to running simulations, you need to determine the initial conditions of the system to reflect it in the one-line. For example, if you want to simulate a motor starting, the breaker or switch upstream to the motor will be open before starting.
5. Review Dynamic Stability Options: You can control various aspects of simulations and outputs.
6. Run Dynamic Stability Simulations: You can run a simulation using the “double-click” method, or context menu commands, or by running a simulation script. Double-clicking on an open motor breaker or switch starts the motor. Double-clicking on a bus faults the bus. If you have created a simulation script, you can select the script and run simulations. Prior to running simulations run the script <<Steady State>>. If the plot shows variables reaching a steady state and appears constant, then you are ready to run simulations. Otherwise, you need to review your data.
7. View DS message log and plot DS Plots: DS Message provides information on the status of initialization, executed commands and script events. The message also logs automatic events such as protective device pickup or tripping, ATS transfer and contactor dropout. Problems encountered during the simulations also appear on the message log.

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