During the development of the vehicles, Audi uses an innovative simulation of power grids with components from the ctrlX AUTOMATION automation system from Bosch Rexroth.
This solution enables realistic simulation of globally available power grids and allows testing of electric vehicles under various grid conditions. In this way, Audi ensures that its vehicles can operate reliably at various High Power Charging (HPC) stations around the world.
Network simulation is necessary because power grid configurations, voltage ranges and frequencies vary from country to country. Audi chose a solution based on Rexroth automation technologies that enables flexible simulation of foreign power grids based on globally available configurations and frequencies.
The solution supports different grid types with voltage ranges between 100 and 540 V and frequencies between 40 and 65 Hz. It can deliver up to 500 kW of power and supports single-phase, two-phase and three-phase grids.
Power is supplied by the IndraDrive ML inverter and isolating transformer. System control and monitoring is handled by the compact ctrlX CORE control platform, in combination with ctrlX I/O. System safety is ensured by the scalability of ctrlX SAFETY. The intuitive user interface is provided by the web-based WebIQ solution and an external control terminal with ctrlX HMI.
Bosch Rexroth explaines that the solution for power grids simulations is characterised by high flexibility and advanced performance. “The ctrlX AUTOMATION system offers an open, modular, app-based architecture that allows adaptation to different network configurations, voltages and frequencies”. The network simulation is housed in an insulated container, equipped with a heat pump cooling system and a heater, to enable outdoor operation.
