High Voltage Measurements
The grid expansion to “smart grids” requires intelligent feeding points for high-voltage grids. Monitoring and controlling of the entire energy supply system will become more complex and sophisticated. Not only the electrical parameters of the line current, but also operating and status information from transformers, inverters and switchgear need to be monitored. For voltages exceeding 4 kV such measurements require very elaborate and expensive safety precautions to protect man and machine against electric shocks.
Renewable energy plants, which are feeding the grid on a medium voltage level (20 kV), also require monitoring at many locations. At each entry point of the Smart Grid, e.g. solar installation, an inverter is necessary to convert the voltage to main voltage level. For voltages exceeding 4 kV, the triggering of the transistors is very costly. Nowadays, the applied control units limit the efficiency of the inverter. LUMILOOP systems will be an enabler for highly efficient inverter by reversing the numerous limitations of the present technologies for controlling transistors. A higher efficiency of the inverter automatically means higher profits during the feeding of the Smart Grid with current.
Besides the EMC related challenges of e‑mobility, high electrical voltages up to 1 kV occur on batteries, motors and controllers. The same affects railway vehicles with voltages up to 25 kV on overhead lines.