CN211567721U - Sectional type parallel power supply switching station for mountain land toothed rail track traffic - Google Patents

Abstract

A sectional type parallel power supply switching station for mountain land tooth rail transit is provided, which can effectively improve the power supply capability. The middle points of the uplink traction network and the downlink traction network are respectively provided with a first section insulator with an electric isolating switch and a second section insulator with an electric isolating switch, and the power supply range is divided into a first traction network power supply interval, a second traction network power supply interval, a third traction network power supply interval and a fourth traction network power supply interval. The first transmission line, the second transmission line, the third transmission line and the fourth transmission line are respectively connected with a first traction network power supply interval, a second traction network power supply interval, a third traction network power supply interval and a fourth traction network power supply interval in parallel sequentially through a circuit breaker and an electric isolating switch. The inner sides of the second transmission line and the third transmission line are connected through an uplink bus, the inner sides of the first transmission line and the fourth transmission line are connected through a downlink bus, and the uplink bus is connected with the downlink bus through a parallel circuit breaker.

Description

Sectional type parallel power supply switching station for mountain land toothed rail track traffic

Technical Field

The utility model relates to a mountain region cogged rail track traffic of direct current traction power supply system specifically is a parallelly connected power supply switching station of mountain region cogged rail track traffic sectional type.

Background

The tourism industry is vigorously developed in recent years in China, and a novel mountain land toothed rail track traffic appears. Different from urban rail transit, the method has the characteristics of long line, large station spacing, high bridge-tunnel ratio, huge slope, one slope of the whole line and the like, so that the mountain land toothed rail transit has higher requirements on traction power supply capacity and power supply reliability.

Because of the special line characteristics of the mountain land toothed rail traffic, a certain driving direction always keeps an upward slope, the other driving direction always keeps a downward slope, and the slope of the line is large (the maximum slope reaches 120 per thousand), so that the traction current of the electric locomotive in the upward slope direction almost reaches the peak value and lasts for a long time, the traction current in the downward slope direction lasts for a short time, if a traditional direct current traction power supply mode is adopted, the difference of the current carrying capacity of traction networks in the upward and downward directions is large, the traction networks meet the requirement of the current carrying capacity, the sectional area is large, the structure is relatively complex, meanwhile, the power supply range of a traction substation of the mountain land toothed rail traffic is 2-5 times that of urban rail traffic, and the influence of the fault range of the traction networks is large.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a mountain region rack rail transit sectional type power supply switching station that connects in parallel is provided to improve power supply capacity effectively, solve the upper and lower difficult problem of pulling the net current-carrying unbalance.

The utility model provides an above-mentioned technical problem adopted technical scheme as follows:

the utility model discloses a parallelly connected power supply switching station of mountain region rack rail transit sectional type, draw the electric substation and go upward between the two to draw net, draw the net down including adjacent first traction substation, second traction substation, provide the used variable power supply of first 10kV 35kV, the used variable power supply of second 10kV 35kV by the middling pressure network, characterized by: the middle points of the uplink traction network and the downlink traction network are respectively provided with a first section insulator with an electric isolating switch and a second section insulator with an electric isolating switch, and the power supply range is divided into a first traction network power supply interval, a second traction network power supply interval, a third traction network power supply interval and a fourth traction network power supply interval by combining the section insulator where the traction power transformer is located; a first power transmission line, a second power transmission line, a third power transmission line and a fourth power transmission line are respectively connected with a first traction network power supply interval, a second traction network power supply interval, a third traction network power supply interval and a fourth traction network power supply interval in parallel sequentially through a first circuit breaker, a second circuit breaker, a third circuit breaker, a fourth circuit breaker, a first electric isolating switch, a second electric isolating switch, a third electric isolating switch and a fourth electric isolating switch; the outer sides of the first power transmission line, the second power transmission line, the third power transmission line and the fourth power transmission line are respectively connected with the ground through a first zinc oxide arrester, a second zinc oxide arrester, a third zinc oxide arrester and a fourth zinc oxide arrester, the inner sides of the second power transmission line and the third power transmission line are connected through an uplink bus, the inner sides of the first power transmission line and the fourth power transmission line are connected through a downlink bus, and the uplink bus is connected with the downlink bus through a parallel circuit breaker to realize uplink and downlink separated power supply and parallel power supply.

The utility model has the advantages that the sectional type parallel power supply switching station for the mountain land rack rail transit is provided, the parallel power supply in the middle of the upper traction network and the lower traction network of the adjacent traction substation of the mountain land rack rail transit is realized, the distribution of the upper current carrying and the lower current carrying is more balanced, and the traction power supply capacity is greatly improved; the middle parts of the traction networks of the adjacent traction substations are segmented, so that the technical problems of large fault range of the traction networks and difficult operation and maintenance caused by large power supply range of the traction substations in mountain land rack rail transit are solved, and the power supply reliability is improved.

Drawings

Fig. 1 is a schematic diagram of the sectional type parallel power supply switching station of mountain land rack rail transit of the present invention.

The figures show the components and corresponding references: a first traction substation A, a second traction substation B, a first 10kV/35kV substation transformer C, a second 10kV/35kV substation D, a second first section insulator 1 with an electric isolating switch, a second section insulator 2 with an electric isolating switch, a first traction network power supply section 3, a second traction network power supply section 4, a third traction network power supply section 5, a fourth traction network power supply section 6, a first electric transmission line 7, a second electric transmission line 8, a third electric transmission line 9, a fourth electric transmission line 10, a first circuit breaker 11, a second circuit breaker 12, a third circuit breaker 13, a fourth circuit breaker 14, a first electric isolating switch 15, a second electric isolating switch 16, a third electric isolating switch 17, a fourth electric isolating switch 18, a first zinc oxide arrester 19, a second zinc oxide arrester 20, a third zinc oxide arrester 21, a first zinc oxide arrester, The system comprises a fourth zinc oxide arrester 22, an uplink busbar 23, a downlink busbar 24, a parallel circuit breaker 25, a first three-position isolating switch 26, a second three-position isolating switch 27, a fifth circuit breaker 28, a sixth circuit breaker 29, a first current transformer 30, a second current transformer 31, a first power transformer 32, a second power transformer 33, a fifth zinc oxide arrester 34 and a sixth zinc oxide arrester 35.

Detailed Description

The present invention will be further explained with reference to the drawings and examples.

Referring to fig. 1, the utility model discloses a mountain region rack rail transit sectional type parallel power supply switching station, including adjacent first traction substation A, second traction substation B and between the two go upward pull the net, pull the net down, provide used variable power supply C of first 10kV 35kV, the used variable power supply D of second 10kV 35kV by the middling pressure network. And a first section insulator 1 with an electric isolating switch and a second section insulator 2 with an electric isolating switch are respectively arranged at the middle points of the uplink traction network and the downlink traction network, and the power supply range is divided into a first traction network power supply interval 3, a second traction network power supply interval 4, a third traction network power supply interval 5 and a fourth traction network power supply interval 6 by combining the section insulator where the traction power transformer is located. The outer sides of a first power transmission line 7, a second power transmission line 8, a third power transmission line 9 and a fourth power transmission line 10 are respectively connected with the ground through a first zinc oxide arrester 19, a second zinc oxide arrester 20, a third zinc oxide arrester 21 and a fourth zinc oxide arrester 22, the inner sides of the second power transmission line 8 and the third power transmission line 9 are connected through an uplink bus 23, the inner sides of the first transmission line 7 and the fourth transmission line 10 are connected through a downlink bus 24, and the uplink bus 23 is connected with the downlink bus 24 through a parallel circuit breaker 25, so that uplink and downlink power supply and parallel power supply are realized.

When any one traction network power supply interval of 2 adjacent traction substations has a fault, 2 power supply intervals in the direction opposite to the fault interval still keep bilateral normal power supply, the parallel circuit breaker 25 does not need to be disconnected, and unilateral parallel power supply is realized in the other power supply interval in the same direction as the fault interval, so that the fault range is effectively controlled, and the power supply capacity under the fault condition is ensured.

The medium voltage network provides a first 10kV/35kV variable power source C and a second 10kV/35kV variable power source D, the first 10kV/35kV variable power source C and the second 10kV/35kV variable power source D respectively pass through a first three-station isolating switch 26, a second three-station isolating switch 27, a fifth circuit breaker 28, a sixth circuit breaker 29, a first current transformer 30, a second current transformer 31, a first power transformer 32 and a second power transformer 33 in sequence through a power transmission line to supply power for a sectional type parallel power supply switching station, and a 2-circuit power transmission line is respectively connected with the ground through a fifth zinc oxide arrester 34 and a sixth zinc oxide arrester 35.

The above is only used for illustrating the present invention, and the present invention is not limited to the specific structure and application range shown and described, so all the corresponding modifications and equivalents that may be utilized belong to the claimed patent scope of the present invention.

Claims (2)

1. The utility model provides a mountain region rack rail track traffic sectional type power supply switching station that connects in parallel, includes that adjacent first pulls transformer substation (A), second and upward pulls net, the net that pulls down between the two, provides first for 10kV/35kV transformer substation (C), second for 10kV/35kV transformer substation (D) by the medium voltage network, characterized by: a first section insulator (1) with an electric isolating switch and a second section insulator (2) with an electric isolating switch are respectively arranged at the middle points of the uplink traction network and the downlink traction network, and the power supply range is divided into a first traction network power supply interval (3), a second traction network power supply interval (4), a third traction network power supply interval (5) and a fourth traction network power supply interval (6) by combining the section insulator where the traction power transformer is located; a first power transmission line (7), a second power transmission line (8), a third power transmission line (9) and a fourth power transmission line (10) are respectively connected in parallel with a first traction network power supply section (3), a second traction network power supply section (4), a third traction network power supply section (5) and a fourth traction network power supply section (6) sequentially through a first circuit breaker (11), a second circuit breaker (12), a third circuit breaker (13), a fourth circuit breaker (14), a first electric isolating switch (15), a second electric isolating switch (16), a third electric isolating switch (17) and a fourth electric isolating switch (18); the outer sides of the first power transmission line (7), the second power transmission line (8), the third power transmission line (9) and the fourth power transmission line (10) are respectively connected with the ground through a first zinc oxide arrester (19), a second zinc oxide arrester (20), a third zinc oxide arrester (21) and a fourth zinc oxide arrester (22), the inner sides of the second power transmission line (8) and the third power transmission line (9) are connected through an uplink bus (23), the inner sides of the first power transmission line (7) and the fourth power transmission line (10) are connected through a downlink bus (24), the uplink bus (23) is connected with the downlink bus (24) through a parallel circuit breaker (25), and uplink and downlink separation and parallel power supply are achieved.

2. The sectional type parallel power supply switching station for mountain land rack rail transit as claimed in claim 1, wherein: the power supply comprises a first 10kV/35kV power transformer (C) and a second 10kV/35kV power transformer (D), wherein the first 10kV/35kV power transformer (C) and the second 10kV/35kV power transformer (D) sequentially pass through a first three-station isolating switch (26), a second three-station isolating switch (27), a fifth circuit breaker (28), a sixth circuit breaker (29), a first current transformer (30), a second current transformer (31), a first power transformer (32) and a second power transformer (33) through a power transmission line to supply power to a sectional type parallel power supply switching station, and the two power transmission lines are respectively connected with the ground through a fifth zinc oxide arrester (34) and a sixth zinc oxide arrester (35).

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