An electrical train messenger wire and a catenary system for an electrical train including the electrical train messenger wire. The messenger wire includes a fiber-reinforced composite strength member and a conductive layer surrounding the fiber-reinforced composite strength member, where the conductive layer is fabricated from copper or a copper alloy. The fiber-reinforced strength member advantageously has a high tensile strength, thereby reducing the sag of a contact wire supported by the messenger wire. The catenary system employing the messenger wire may facilitate faster train speeds and may obviate the need for cantilever systems such as balanced weight anchors to maintain tension in the contact wire.

An electrified railway power supply system without negative sequence in the whole process and without power supply networks at intervals, can comprise an external power supply system, an input power supply system from external to internal, and an internal power supply system. For external power supply, single-phase power supply is changed to double-phase power supply, and power of a single phase is input to the power supply system within the train via a contactor on a left arm and a right arm of a double-phase pantograph. No neutral section for passing of phase separation is provided in the whole process of operation, and a plurality of sections in the whole process are provided with no power supply network at intervals, and the motor train unit can operate normally without mechanical support for the power supply network.

An electrified railway power supply system without negative sequence in the whole process and without power supply networks at intervals, can comprise an external power supply system, an input power supply system from external to internal, and an internal power supply system. For external power supply, single-phase power supply is changed to double-phase power supply, and power of a single phase is input to the power supply system within the train via a contactor on a left arm and a right arm of a double-phase pantograph. No neutral section for passing of phase separation is provided in the whole process of operation, and a plurality of sections in the whole process are provided with no power supply network at intervals, and the motor train unit can operate normally without mechanical support for the power supply network.

This system for powering an overhead contact line, which includes a contact wire consisting of a plurality of conductive sections separated by insulating sections, includes power supply sub-stations, each conductive section being connected, on the side of an upstream end, to an upstream sub-station via an upstream controlled switch and, on the side of a downstream end, to a downstream sub-station via a downstream controlled switch. This system includes a detection device, associated with a conductive section, to be monitored, which includes a means for transmitting a characteristic signal to an upstream or downstream end of said conductive section and a receiving means able to receive the characteristic signal at the other end, the receiving means modifying the value of a state signal applied to a control circuit for actuating the opening of the downstream switch and/or of the upstream switch.

An overhead line system provides electrical energy for an electrically driven vehicle by use of an overhead line. The overhead line system has a plurality of catenary systems which each have a contact wire connected to a carrying cable by a plurality of connecting devices and which are arranged, on the basis of parallel zones, to form a continuously accessible overhead line. The overhead line system further has an overhead line which is arranged in a curvature section in such a way that the vertical projection of the overhead line has a curved profile in a horizontal plane. The overhead line system also has a curved parallel zone which is arranged in the curvature section in such a way that the vertical projection of the parallel zone into the horizontal plane follows the curved profile of the projection of the at least one overhead line in the curvature section.

An overhead line system provides electrical energy for an electrically driven vehicle by use of an overhead line. The overhead line system has a plurality of catenary systems which each have a contact wire connected to a carrying cable by a plurality of connecting devices and which are arranged, on the basis of parallel zones, to form a continuously accessible overhead line. The overhead line system further has an overhead line which is arranged in a curvature section in such a way that the vertical projection of the overhead line has a curved profile in a horizontal plane. The overhead line system also has a curved parallel zone which is arranged in the curvature section in such a way that the vertical projection of the parallel zone into the horizontal plane follows the curved profile of the projection of the at least one overhead line in the curvature section.

This system for powering an overhead contact line, which includes a contact wire consisting of a plurality of conductive sections separated by insulating sections, includes power supply sub-stations, each conductive section being connected, on the side of an upstream end, to an upstream sub-station via an upstream controlled switch and, on the side of a downstream end, to a downstream sub-station via a downstream controlled switch. This system includes a detection device, associated with a conductive section, to be monitored, which includes a means for transmitting a characteristic signal to an upstream or downstream end of said conductive section and a receiving means able to receive the characteristic signal at the other end, the receiving means modifying the value of a state signal applied to a control circuit for actuating the opening of the downstream switch and/or of the upstream switch.