High voltage electrical network with DC ice-melting device and current return through ground

摘要

A high-voltage electrical network comprises neutral conductors, at least two of them being grounded, and at least two ground circuits, at least one of them being connected to a neutral conductor and functioning as a first operational grounding means which is a part of a circuit for melting the icing by direct current on one of the lines of the high-voltage electrical network. The ice melting circuit is also provided with at least one more series-connected operational grounding means, a heated circuit of a high-voltage electrical network, a device for melting the icing by direct current on one of the lines of the high-voltage electrical network and a ground used as a return conductor. The high-voltage electrical network, additionally comprises at least one device, for preventing the direct current from flowing to the neutral conductors of the high-voltage electrical network, connected to one of the neutral conductors, coupled to one of the ground circuits used as an operational grounding means and forming a part of a circuit for melting the icing on one of the lines of the high-voltage electrical network by direct current, and to the same ground circuit.