Scenarios

A Scenario represents a special loading of the grid, where existing load/generation can be scaled and/or additional load/generation can be added.

It is therefore possible to analyze an extreme operating condition of today's grid or the impact of future developments such as e-mobility or decentralized energy production in terms of grid violations.

Scenarios can be selected on any calculation page as a grid modifiction. They will be listed in the dropdown next to the grid selector, in which grid upgrades and connection requests can also be selected.

Setup

Previously created Scenarios can be chosen and changed from the Scenario dropdown list.

A new Scenario can be created by clicking on .

A Scenario can be deleted by selecting it from the dropdown list, clicking on and then .

Scenarios can be used with any Grid. Selecting a Grid from the dropdown shows how this specific scenario is applied to that grid.

the Scenario once finished.

Existing Load and Generation

The existing load and generation in the grid model can be scaled by category. These scenarios are called Scaling Scenarios. The impact of scenarios that only contain scalings of existing loads and generators can be studied using the Scaling Stress Test tool.

The reactive power can be adjusted by overwriting the reactive power characteristic of the existing load or generation.

For example, a Scenario

• PV generation with $\cos (\varphi )=0.95$

could be compared to another Scenario

• PV generation with $\cos (\varphi )=0.90$

to investigate the impact of reactive power compensation of PV power inverters.

INFO

• The scaling by category requires that different load and generation categories are defined in the grid model.
• Unused categories are hidden by default.
• Scaling Scenarios can also be applied in other tools such as:
  • Power Flow
  • Short Circuit
  • Protection
  • Hosting Capacity
  • N-1
  • Simulation

Additional Load and Generation

By adding additional load and/or generation, the future grid extensions can be simulated. Scenarios that contain additional load/generation are called Future Scenarios. Future Scenarios can be studied using the Future Scenario Stress Test tool.

To add additional load/generation, click on the button. The load/generation settings can be configured in the Edit dialog.

Bus Filter

The selection of buses where additional load/generation is to be added can be refined with the bus filter. The following options are available:

• Bus type: defines the type of the bus.
• Voltage level: defines the voltage level.
• Bus ID: defines specific buses in the grid.
• Number of customers: only buses that have a certain number of existing loads/generators are selected.
• Existing customer of same type: allow or forbid to add devices of the same type to a bus if the device category already exists at the bus.

TIP

Specific buses from the grid can be directly selected from the map viewer instead of adding them manually in the Bus ID field. This needs to be done before clicking on the button.

Quantity & Power

The number of devices and the power characteristics can be defined. The following options are available:

• Number of devices: defines the absolute or relative amount of loads/generators to disperse on the buses.
• Dispersion: defines the type of dispersion of the loads/generators on the buses.
• Relative To: defines whether the dispersion relates to the number of buses or number of customers (loads/generators) in the grid.
• Power per device: defines the power in kW of each load/generator.
• $\cos (\varphi )$: defines the static power factor (inductive/reactive) of each load/generator.
• Time series behavior: defines the time series behavior when the scenario is used in Time Series Simulations.

The selected number of loads/generators will be placed randomly on the selected buses. If you use a scenario in a static or time series calculation by selecting it from the grid upgrade/connection request/scenario dropdown, the loads and generators will be added to your grid statically, i.e., by a fixed dispersion.

Advanced Options

Clicking on reveals the behvior on how to handle adding additional devices.

The options are:

• varied: 0 to $x$ devices
• fixed: $x$ devices

The first option is on by default. During the Future Scenario Stress Test the amout of additional devices is varied from 0 to $x$. This allows for an assessment of what amout of additional devices will start causing problems in the grid.

The second option can be chosen if a fixed amount of additional devices is to be evaluated.

WARNING

The second option cannot be simulated on its own. An additional load/generation with the varied option needs to be defined with .

Clicking on reveals how many buses comply with the specified settings and how much load/generation will be dispersed in the grid.

Click to exit the Edit dialog.

INFO

• Note that a future scenario is more complex to calculate. The more additional load/generation categories are defined, the longer the calculation time.
• Future Scenarios can also be applied in tools such as:
  • Simulation
  • Hierarchical Simulation