Double triangle phase sequence common-tower common-window dual loop transmission line

Abstract

The invention relates to a double-delta double-circuit transmission line with phase sequence in the same tower window, which belongs to the technical field of high, ultra-high and extra-high voltage overhead line electric power transmission. The A-phase wire, the B-phase wire and the C-phase wire of a first circuit transmission line are arranged at the upper side of a supporting frame in a delta shape, and the A-phase wire, the B-phase wire and the C-phase wire of a second circuit transmission line are arranged at the lower side of the supporting frame in a delta shape. All the phase wires are relatively fixed with the supporting frame through a wire supporting rod. The transverse two-phase wires on the second layer are positioned in the same phase position, and the first layer wires and the third layer wires at both sides of the supporting frame are respectively positioned in the same phase position. The transmission line has higher natural power and narrower power transmission corridor; compared with the double-circuit transmission line with same phase sequence in the same tower window, the transmission line has lower lightning protecting wire induced voltage and lower double-circuit simultaneous tripping rate during the lightning striking process; and compared with the double-circuit transmission line with negative phase sequence in the same tower window, the transmission line has smaller potential supplied current and recovery voltage, and lower radio interference, audible noise and corona loss.

Description

technical field [0001] The invention relates to a double-delta phase-sequence double-circuit power transmission line with the same tower and the same window, and belongs to the technical field of electric energy transmission for high-voltage, ultra-high voltage, and ultra-high voltage overhead lines. Background technique [0002] In the field of power transmission technology, compared with compact transmission lines, conventional single-circuit and double-circuit transmission lines on the same tower have problems such as wide transmission corridors, poor electromagnetic environment, and small transmission capacity. Specifically: [0003] Conductors with different phases generate electric field components with different phases at the surface, and the electric field components with different phases inhibit and partially cancel each other. The magnitude of each electric field component is related to the distance between the conductor that generates the component and the point o...

AI Technical Summary

Problems solved by technology

For the former, the delivery capacity of a single circuit also has a certain limit.

The latter naturally results in wider transmission corridors due to the wider pole towers, which cannot play the role of compact transmission lines saving transmission corridors

Images