CN105119228B - A kind of aerial list of double back overhead transmission line adjusts back connect line bar and wiring construction - Google Patents

Abstract

The invention relates to an overhead single-return phase wiring rod and a wiring structure of a double-circuit overhead transmission line. The second and fourth layers of the wiring rod have the same length as the wire-hanging horizontal bar, which is not less than twice the leakage distance, and is more The length of the wire hanging bar on the third layer is not less than double the creepage distance, the length of the wire hanging bar on the third layer is not less than double the creepage distance, and the ends of the two hanging wire bars on the second and fourth floors Conductors are vertically arranged between the parts, and the conductors are connected to the lead-out wires of the second layer of hanging wire bars and the lead-in wires of the fourth layer of hanging wire bars through jumpers, and the lead-in wires of the upper layer of hanging wire bars and the lower layer of hanging wire bars The lead-out wires of the rod are connected by jumper wires arranged obliquely up and down to realize the phase sequence adjustment of the three lead-in wires. The wiring rod of the present invention has a simple structure, realizes phase sequence adjustment of three phase wires on a basic terminal rod, and solves the problems of difficulty, high cost and high maintenance cost in the phase sequence adjustment of one circuit in a double circuit.

Description

An overhead single-return phase wiring rod and wiring structure for double-circuit overhead transmission lines

technical field

The invention relates to an overhead single-return phase wiring rod and a wiring structure of a double-circuit overhead transmission line, belonging to the technical field of high-voltage power transmission.

Background technique

The transmission line is an electrical device that connects the substations at both ends. Each AC transmission line is erected with 3 phase conductors, which correspond to phase A, phase B and phase C of the transformer on the substation side. The technical requirements are that each conductor should be connected to the substation at both ends. When the double-circuit overhead line is connected to the substation, in order to meet the leakage distance between different phases not less than twice, the phase sequence of the towers at both ends of the substation may be inconsistent from top to bottom, so it is necessary to carry out the transmission line. Phase adjustment (phase modulation) to achieve the correct connection of the phase sequence at both ends. The usual method used in the past is to adjust the phase sequence by erecting a new terminal pole outside the transmission line, which occupies a large area, is expensive, and requires high maintenance costs in the later period.

Contents of the invention

The purpose of the present invention is to provide a double-circuit overhead transmission line single-return phase wiring rod and wiring structure to solve the problems of large footprint and high cost caused by the current single-return phase using a new terminal pole outside the transmission line. .

In order to solve the above technical problems, the present invention provides a double-circuit overhead transmission line single-return phase connection rod. The phase modulation connection rod includes a base single-column vertical steel pipe rod, and four layers are arranged on the steel pipe rod from high to low. Double-sided hanging wire cross bar, the first layer is used for grounding wires, the second to fourth layers are respectively used for hooking the first phase, second phase and third phase conductors, the second on at least one side of the steel pipe rod The length of the two wire-hanging cross-bars on the fourth floor is the same, not less than twice the creepage distance, and the length of the other wire-hanging cross-bar is not less than twice the creepage distance, and the other hanging wire The length of the wire crossbar is not less than twice the creepage distance.

The two wire-hanging cross bars of the same length in the second to fourth layers are respectively the wire-hanging cross bars of the second layer and the fourth layer on the steel pipe rod.

The middle part of the second-layer and fourth-layer wire-hanging crossbars is not less than one times the creepage distance. There are wire-hanging points for respectively hooking the corresponding phase lead-in wires and phase-modulated lead-out wires. The third layer of wire-hanging The end of the cross bar or near the end is not less than one time the creepage distance. There are wire hanging points for respectively hooking the corresponding phase lead-in wires and phase-modulated lead-out wires. The second and fourth layer hanging wires Hanging points for hanging vertical wires are provided at the ends or not less than twice the creepage distance.

The present invention also provides a wiring structure for a double-circuit overhead power transmission line with a single-return phase wiring rod. The wiring structure includes a base single-column vertical steel pipe rod, and the steel pipe rod is provided with four layers of double-sided poles from high to low. Wire hanging bars, the first layer is used for grounding wires, the second to fourth layers are respectively connected to three-phase main wires, and the lengths of the two layers of wire hanging bars in the second to fourth layers are the same , the creepage distance is not less than twice, and the creepage distance is not less than double the length of the other layer of hanging rails, and the middle part of the two-layer hanging rails is not less than twice the creepage distance. Corresponding to the incoming wire of the phase and the outgoing wire after phase adjustment, a vertical wire is arranged in the vertical direction between the ends of the extended part of the two-layer hanging cross bar or a position close to the end that is not less than one time of the creepage distance. The vertical wires are connected to the lead-out wires of the upper-layer wire-hanging bar and the lead-in wires of the lower-layer wire-hanging bar through jumper wires. The lead-in wire of the corresponding phase and the lead-out lead after phase modulation are connected at the top or near the end not less than one time of the creepage distance.

The two wire-hanging cross bars of the same length in the second to fourth layers are respectively the wire-hanging cross bars of the second layer and the fourth layer on the steel pipe rod.

The middle part of the second-layer and fourth-layer wire-hanging crossbars is not less than one times the creepage distance. There are wire-hanging points for respectively hooking the corresponding phase lead-in wires and phase-modulated lead-out wires. The third layer of wire-hanging The end of the cross bar or near the end is not less than one time the creepage distance. There are wire hanging points for respectively hooking the corresponding phase lead-in wires and phase-modulated lead-out wires. The second and fourth layer hanging wires Hanging points for hanging vertical wires are provided at the ends or not less than twice the creepage distance.

The beneficial effect of the present invention is: the length of the wire-hanging crossbar of the second and fourth layers in the wiring rod of the present invention is the same, not less than twice the creepage distance, and is longer than the length of the third-layer wire-hanging crossbar Not less than double the creepage distance, the length of the third layer of wire hanging bars is not less than twice the creepage distance, a wire is vertically arranged between the ends of the two hanging wire bars on the second and fourth layers, the vertical The wires are connected to the lead-out wires of the second-layer wire-hanging crossbar and the lead-in wires of the fourth-layer wire-hanging crossbar through jumper wires. The arranged jumper wires are connected to realize the phase sequence adjustment of the three incoming wires. The wiring rod of the present invention has a simple structure, realizes phase sequence adjustment of three phase wires on a basic terminal rod, and solves the problems of difficulty, high cost and high maintenance cost in the phase sequence adjustment of one circuit in a double circuit.

Description of drawings

Fig. 1 is the front view of the structure of the overhead terminal pole of the double-circuit overhead transmission line of the present invention;

Fig. 2 is a side view of the structure of the overhead terminal pole of the double-circuit overhead transmission line of the present invention;

Fig. 3 is the top view (1) of the structure of the overhead wiring rod of the double-circuit overhead transmission line of the present invention;

Fig. 4 is the top view (2) of the structure of the overhead wiring rod of the double-circuit overhead transmission line of the present invention;

Fig. 5 is the top view (3) of the structure of the overhead wiring rod of the double-circuit overhead transmission line of the present invention;

Fig. 6 is a top view (4) of the structure of the overhead terminal pole of the double-circuit overhead transmission line of the present invention;

Fig. 7 is a wiring structure diagram of an overhead terminal pole of a double-circuit overhead transmission line in an embodiment of the present invention.

detailed description

The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

An embodiment of a double-circuit overhead transmission line single-return phase wiring rod of the present invention

The double-circuit overhead transmission line single-callback phase wiring rod of the present invention includes a base single-column vertical steel pipe rod, and the steel pipe rod is provided with four layers of double-sided wire-hanging horizontal bars in sequence from high to low, and the first layer is used for grounding wires. , the second to fourth layers are respectively used to connect the first phase, the second phase and the third phase conductor, wherein the two hanging wire horizontal bars in the second to fourth layer hanging wire horizontal bars on at least one side of the steel pipe pole The length of the rod is the same, not less than twice the creepage distance, and the length of the other hanging bar is not less than twice the creepage distance, and the length of the other hanging bar is not less than twice the creepage distance.

In this embodiment, the steel pipe poles are provided with four layers of double-side wire-hanging crossbars in order from high to low, which are respectively used to hook up the double-circuit main line conductors and ground wires. The following is an example of the circuit located at the inner side of the line corner. The first layer of wire hanging rails on the side is used for grounding wires, and the second to fourth layer of wire hanging rails are respectively used to hook B-phase, A-phase and C-phase wires, as shown in Figure 7, where the second The length of the wire-hanging crossbar on the first floor and the fourth floor is the same, not less than twice the creepage distance, and the length of the third-floor wire-hanging crossbar is not less than double the creepage distance. The creepage distance whose length is not less than double, as shown in Figure 1 and Figure 2. The middle part of the wire-hanging crossbar on the second and fourth layers is not less than one time the creepage distance. There are wire-hanging points for respectively hooking the corresponding phase lead-in wires and phase-modulated lead-out wires. The second and fourth layers The end of the wire-hanging bar or the place not less than twice the creepage distance are provided with a wire-hanging point for hooking a vertical wire, and the two wire-hanging points are on a straight line along the vertical direction. The ground wire and the main line wire are hung according to the conventional erection method, and the ground wire is used to be hung on the end of the first layer of wire hanging rails, as shown in Figure 3; the middle part of the second layer of wire hanging rails or near the middle is not The B-phase lead-in wire and the phase-modulated lead-out wire are connected at the position less than one time of the creepage distance, as shown in Figure 4; the end of the third layer hanging wire cross bar or near the end is not less than one time of the creepage distance. Phase A lead-in wires and lead-out wires after phase modulation are shown in Figure 5; one side of the middle part of the fourth-layer wire-hanging crossbar, and the middle part of the fourth-layer wire-hanging crossbar or near the middle is not less than twice the creepage distance. Connected with C-phase lead-in lead and lead-out lead after phase modulation, as shown in Figure 6.

An embodiment of the wiring structure of a double-circuit overhead transmission line single-turnback phase terminal pole according to the present invention

The wiring structure of the single-callback phase wiring rod of the present invention includes a base single-column vertical steel pipe rod, and the steel pipe rod is provided with four layers of double-sided wire-hanging horizontal bars in sequence from high to low, the first layer is used for grounding wires, and the second layer is used for grounding wires. The second to fourth floors are respectively connected with three-phase main conductors. The lengths of the two-layer hanging wire bars in the second to fourth floors are the same, not less than twice the creepage distance, The length of the bar is increased by not less than one time of the creepage distance, and the middle part of the two-layer wire-hanging horizontal bar is not less than one time of the creepage distance. A vertical wire is arranged in the vertical direction between the end of the extended part of the hanging line bar or a position close to the end that is not less than one time the creepage distance. The lead-in wire connection of the wire-hanging bar, the length of the other layer of the wire-hanging bar is not less than one time of the creepage distance, and the end of the line-hanging bar of this layer is not less than one time of the creepage distance. The lead-in wires of the phase and the lead-out wires after phase modulation, the lead-in wires of the upper-layer hanging crossbar are connected with the lead-out wires of the lower hanging-line crossbar through jumper wires.

The structure of the single callback phase wiring rod in this embodiment is shown in Figure 1 and Figure 2, including a base single-column vertical steel pipe rod, and the steel pipe rod is provided with four layers of double-sided hanging wires parallel to each other in sequence from high to low Cross bars, the first layer is used for grounding wires, the second to fourth layers are respectively connected to the three-phase main wires, the length of the wire-hanging cross bars on the second and fourth layers is the same, not less than twice the creepage distance, which is greater than that of the first The length of the three-layer wire-hanging crossbar is not less than double the creepage distance, and the length of the third-layer wire-hanging crossbar is not less than twice the creepage distance. The ground wire and the main line wire are hung according to the conventional erection method, and the ground wire is hung at the end of the first layer of hanging rail, as shown in Figure 3; the middle part of the second layer of hanging rail or near the middle is not less than one Phase B lead-in conductors and phase-modulated lead-out conductors are connected at twice the creepage distance, as shown in Figure 4; phase A is connected at the end of the cross bar on or near the end of the third layer of hanging wires not less than twice the creepage distance. The lead-in wires and the lead-out wires after phase modulation are shown in Figure 5; on one side of the middle part of the fourth-layer wire-hanging crossbar, there is a The lead-in wire of phase C and the lead-out wire after phase modulation are shown in Figure 6. A vertical wire is arranged in the vertical direction between the end of the extended part of the second layer and the fourth layer of the hanging wire cross bar or a position close to the end not less than one time of the creepage distance, and the extended part here is connected to the third layer. Where the wire hanging bar protrudes, the vertical wire is connected with the lead-out wire of the second layer of hanging wire bar and the lead-in wire of the fourth layer of hanging wire bar through a jumper wire, which is used to connect the fourth layer of hanging wire bar The C-phase lead-in wire on the top is hooked to the lead-out wire of the second-layer hanging bar, and the B-phase lead-in wire of the second-layer hanging bar is connected to the lead-out lead of the third-layer hanging bar through a jumper wire. The A-phase lead-in wire of the third-layer wire-hanging crossbar is connected with the lead-out wire of the fourth-layer wire-hanging crossbar through a jumper wire. Insulators are used to connect the above-mentioned wires to the wire-hanging crossbar. Through the above-mentioned connection, before the phase adjustment, the phases of the wiring rod from top to bottom are B, A, and C. After the phase adjustment, the obtained phase sequence is C, B, and A. , realizing the phase sequence adjustment of the three phase wires on a base terminal pole.

The guide and ground wires of the main line of the present invention are hanged according to the conventional erection method, the jumper wires are arranged vertically and obliquely, and the jumper wires are arranged horizontally, so as to fully utilize the space height and width to the maximum extent.

Claims (3)

1. A double-circuit overhead transmission line single-callback phase wiring rod, characterized in that the phase-modulating wiring rod includes a base single-column vertical steel pipe rod, and four layers of double-sided hanging rods are arranged on the steel pipe rod from high to low. Line cross bar, the first layer is used for grounding wires, the second to fourth layers are respectively used to connect the first phase, second phase and third phase conductors, and the second to fourth layers on at least one side of the steel pipe rod The length of the two wire-hanging cross-bars in the layer-hanging wire cross-bar is the same, not less than twice the creepage distance, and the length of the other wire-hanging cross-bar is not less than twice the creepage distance The length is not less than twice the creepage distance; the two wire-hanging crossbars of the same length in the second to fourth layers are respectively the wire-hanging crossbars of the second and fourth layers on the steel pipe pole; The middle part of the second-layer and fourth-layer wire-hanging crossbars is not less than one times the creepage distance. There are wire-hanging points for respectively hooking the corresponding phase lead-in wires and phase-modulated lead-out wires. The third layer of wire-hanging The end of the cross bar or near the end is not less than one time the creepage distance. There are wire hanging points for respectively hooking the corresponding phase lead-in wires and phase-modulated lead-out wires. The second and fourth layer hanging wires Hanging points for hanging vertical wires are provided at the ends or not less than twice the creepage distance. 2. A wiring structure for a double-circuit overhead transmission line single-callback phase wiring rod, characterized in that the wiring structure includes a base single-column vertical steel pipe rod, and the steel pipe rod is sequentially arranged with four layers of double poles from high to low. Side hanging wire bars, the first layer is used for grounding wires, the second to fourth layers are respectively connected to three-phase main wires, the length of the two layers of wire hanging bars in the second to fourth layers The same, the creepage distance is not less than twice, and the creepage distance is not less than double the length of the other layer of hanging rails, and the middle part of the two layers of hanging rails is not less than twice the creepage distance. There are lead-in wires corresponding to phases and phase-modulated lead-out wires, and vertical wires are arranged in the vertical direction between the ends of the extended part of the two-layer hanging cross bar or a position close to the end that is not less than twice the creepage distance. The vertical wire is connected with the lead-out wire of the upper layer of the wire-hanging bar and the lead-in wire of the lower layer of the wire-hanging bar through a jumper wire. The lead-in wires of the corresponding phases and the lead-out wires after phase modulation are connected at the end or near the end not less than one time of the creepage distance. ; The two wire-hanging cross bars of the same length in the second to fourth layers are respectively the wire-hanging cross bars of the second layer and the fourth layer on the steel pipe rod. 3. The wiring structure of the double-circuit overhead transmission line single-callback phase wiring rod according to claim 1, characterized in that, the middle parts of the second layer and the fourth layer of hanging cross bars are not less than one times the leakage distance. Hanging points are provided for respectively hooking the corresponding phase lead-in wires and phase-modulated lead-out wires, and the end of the third-layer wire hanging bar or a place close to the end is not less than twice the creepage distance. The hanging points of the phase lead-in wires and the phase-adjusted lead-out wires, the ends of the second and fourth layer hanging wire bars or not less than twice the creepage distance are provided with hanging wires for hanging vertical wires point.