In the attached project, four different QDSL battery models are implemented that control the power consumption or feed-in of a battery (an ElmGenstat element is used for the battery). These QDSL models, that are also available in the global DIgSILENT library, use different approaches to decide whether power has to be consumed or fed in:

• Battery Type 1 (Voltage Measurement): Power is consumed if the voltage falls below a threshold at a specified terminal and power is fed in when a different voltage threshold is exceeded.
• Battery Type 2 (Power Measurement): Power is consumed when a power threshold at a specified line is exceeded and the direction of the power indicates generation. If consumption is displayed instead, the battery will feed-in power.
• Battery Type 3 (Current Measurement): As for type 2, but the current at the specified line is used as the threshold value.
• Battery Type 4 (Power Minimisation): The power consumption or feed-in is automatically set so that the power flow over a specific line is minimised.

To see how the models work, execute a Quasi-Dynamic simulation in the attached project. After running the simulation, predefined plots with relevant parameters and state variables can be used to observe the model behaviour.

A detailed description of the Battery Model Type 2 can be found as a QDSL modelling example in the chapter Quasi-Dynamic Simulation of the PowerFactory manual.