A system for supplying power to a load connected to a power supply network, to achieve improve operating. the invention provides for the load to be connected via an inductive element, such as a duplex inductor, to the electrical supply network and to an energy store. With the inductive element having the same turns ratios, the impedance between the electrical power supply network and the energy store is greater by a factor of about 4 than that between the load and the power supply network or the energy store.