Patent ID: 11919417
Assignee: DR. ING. H. C. F. PORSCHE AG
Field: Transport (Mechanical engineering)
Classification: CPC B  H  Y | IPC B  H

Claim 11:
12. A method for controlling a load management system for managing loads present in a power distribution grid, said load management system including a control unit and at least three current transformers, which are each connected to the control unit by a signal cable, wherein a first current transformer of the at least three current transformers is arranged in the power distribution grid such that said first current transformer is configured for measuring a current level in a three-phase grid connecting line of the power distribution grid, said three-phase grid connecting line being connected to a power supply company, wherein a second current transformer of the at least three current transformers is arranged in the power distribution grid such that said second current transformer is configured for measuring a current level in a first power line of the power distribution grid, which first power line feeds at least one charging station of the power distribution grid, and wherein a third current transformer of the at least three current transformers is arranged in the power distribution grid and configured for measuring a current level in a second supply line for the power distribution grid, said second supply line being connected to a power-generating device connected to the second supply line for the power distribution grid, the method comprising:
continuously measuring the current level in the three-phase grid connecting line by way of the first current transformer;
reducing a charging current of the charging station if the current level measured in the three-phase grid connecting line is above a predetermined first threshold value;
deactivating the charging station when the charging current is below a predetermined minimum charging current;
continuously measuring the current level in the second supply line for the power distribution grid, by way of the third current transformer;
detecting which individual phase of the three-phase grid connecting line supplies power to the at least one charging station of the power distribution grid by supplying a predetermined current level on a specific phase of the three-phase grid connecting line and measuring a reduced predetermined current level on the specific phase;
switching the charging current of the charging station to the power-generating device connected to the second supply line for the power distribution grid, wherein the power-generating device is a renewable power source for the charging station and wherein the power-generating device is connected to the second supply line for the power distribution grid via the third current transformer; and
using renewable power from the renewable power source as a primary power source for the charging station.