Switching station electrical equipment arrangement structure

Abstract

The invention provides a switch station electrical equipment arrangement structure, and relates to the technical field of switch stations, electrical equipment is divided into three groups corresponding to three phases of three-phase power, and each group of electrical equipment comprises a first tubular bus and a second tubular bus which are arranged in parallel; each group of electrical equipment further comprises a first lightning arrester, a first voltage transformer, a first single-pole isolating switch, a second single-pole isolating switch, a current transformer, a single-phase circuit breaker, a third single-pole isolating switch, a second incoming and outgoing line, a fourth single-pole isolating switch, a second lightning arrester, a second voltage transformer and a plurality of groups of incoming and outgoing lines; the single-phase circuit breaker, the lightning arrester and the voltage transformer are arranged at the end of the tubular bus, so that the number of incoming and outgoing lines is reduced, the overall length of the tubular bus is reduced, the problem that an existing switching station is large in occupied area is solved, and the switching station is suitable for switching station construction.

Description

Technical Field

[0001] The present invention relates to the technical field of switch stations, and in particular to an electrical equipment arrangement structure of a switch station. Background Art

[0002] 220kV switch stations often use double busbar connection. The busbars are tubular busbars. The same-phase busbars are arranged in parallel. Single-phase circuit breakers, lightning arresters and voltage transformers are usually arranged on both sides of the double busbars like the incoming and outgoing line loops, each occupying an incoming and outgoing line interval position, and the incoming and outgoing line interval is usually 15 meters. Therefore, the bus tie circuit breakers, busbar lightning arresters, voltage transformers and other connection devices connected to the existing switch station tubular busbars will occupy an incoming and outgoing line position, which will cause the switch station to occupy a large area. Summary of the invention

[0003] The technical problem solved by the present invention is to provide a switch station electrical equipment layout structure to solve the problem that the existing switch station occupies a large area.

[0004] The technical solution adopted by the present invention to solve the above technical problems is as follows: the switch station electrical equipment layout structure, the electrical equipment is three groups, corresponding to the three phases of the three-phase electricity, each group of electrical equipment includes a first tubular busbar and a second tubular busbar arranged in parallel, each group of electrical equipment also includes a first lightning arrester, a first voltage transformer, a first single-pole disconnector, a second single-pole disconnector, a current transformer, a single-phase circuit breaker, a third single-pole disconnector, a fourth single-pole disconnector, a second lightning arrester, a second voltage transformer and multiple groups of incoming and outgoing lines; the first lightning arrester and the first voltage transformer are both connected to one end of the first single-pole disconnector, and the other end of the first single-pole disconnector is connected to the first tubular busbar. One end, the other end of the first tubular busbar is connected to one end of the second single-pole disconnector, the other end of the second single-pole disconnector is connected to one end of the current transformer, the other end of the current transformer is connected to one end of the single-phase circuit breaker, the other end of the single-phase circuit breaker is connected to one end of the third single-pole disconnector, the other end of the third single-pole disconnector is connected to one end of the second tubular busbar, the other end of the second tubular busbar is connected to one end of the fourth single-pole disconnector, and the other end of the fourth single-pole disconnector is respectively connected to the second lightning arrester and the second voltage transformer; each group of incoming and outgoing lines includes a first switch and a second switch, which are connected to the first tubular busbar through the first switch or connected to the second tubular busbar through the second switch.

[0005] Furthermore, the first single-pole isolating switch and the fourth single-pole isolating switch each include two grounding switches, and the second single-pole isolating switch and the third single-pole isolating switch each include one grounding switch.

[0006] Beneficial effects of the invention: The invention provides a switch station electrical equipment layout structure, the electrical equipment is three groups, corresponding to the three phases of three-phase electricity, each group of electrical equipment includes a first tubular bus and a second tubular bus arranged in parallel, each group of electrical equipment also includes a first lightning arrester, a first voltage transformer, a first single-pole disconnector, a second single-pole disconnector, a current transformer, a single-phase circuit breaker, a third single-pole disconnector, a second incoming and outgoing line, a fourth single-pole disconnector, a second lightning arrester, a second voltage transformer and multiple groups of incoming and outgoing lines, the single-phase circuit breaker, the lightning arrester and the voltage transformer are arranged at the end of the tubular bus, so as to save the number of incoming and outgoing lines and reduce the overall length of the tubular bus, thereby solving the problem of large floor space occupied by the existing switch station. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a schematic diagram of the connection relationship of each group of electrical equipment in the electrical equipment layout structure of a switch station provided by the present invention;

[0008] Among them, 1 represents the first lightning arrester, 2 represents the first voltage transformer, 3 represents the first single-pole disconnector, 4 represents the first tube-type busbar, 5 represents the second single-pole disconnector, 6 represents the current transformer, 7 represents the single-phase circuit breaker, 8 represents the third single-pole disconnector, 9 represents the second tube-type busbar, 10 represents the fourth single-pole disconnector, 11 represents the second voltage transformer, 12 represents the second lightning arrester, 13 and 14 represent the first switch and the second switch of the first group of incoming lines respectively, and 15 and 16 represent the first switch and the second switch of the second group of incoming and outgoing lines respectively. DETAILED DESCRIPTION

[0009] The present invention provides a switch station electrical equipment layout structure, the electrical equipment is divided into three groups, corresponding to the three phases of three-phase electricity, each group of electrical equipment, such as Figure 1As shown, it includes a first tubular busbar 4 and a second tubular busbar 9 arranged in parallel, as well as a first lightning arrester 1, a first voltage transformer 2, a first single-pole disconnector 3, a second single-pole disconnector 5, a current transformer 6, a single-phase circuit breaker 7, a third single-pole disconnector 8, a fourth single-pole disconnector 10, a second lightning arrester 12, a second voltage transformer 11 and multiple groups of incoming and outgoing lines; the first lightning arrester 1 and the first voltage transformer 2 are both connected to one end of the first single-pole disconnector 3, the other end of the first single-pole disconnector 3 is connected to one end of the first tubular busbar 4, the other end of the first tubular busbar 4 is connected to one end of the second single-pole disconnector 5, and the second The other end of the single-pole disconnector 5 is connected to one end of the current transformer 6, the other end of the current transformer 6 is connected to one end of the single-phase circuit breaker 7, the other end of the single-phase circuit breaker 7 is connected to one end of the third single-pole disconnector 8, the other end of the third single-pole disconnector 8 is connected to one end of the second tubular bus 9, the other end of the second tubular bus 9 is connected to one end of the fourth single-pole disconnector 10, and the other end of the fourth single-pole disconnector 10 is respectively connected to the second lightning arrester 12 and the second voltage transformer 11; each group of incoming and outgoing lines includes a first switch and a second switch, which is connected to the first tubular bus 4 through the first switch or connected to the second tubular bus 9 through the second switch.

[0010] Specifically, there are two groups of incoming and outgoing lines, the first group of incoming and outgoing lines includes a first switch 13 and a second switch 14, and the second group of incoming and outgoing lines includes a first switch 15 and a second switch 16. The first group of incoming and outgoing lines is connected to the first tube-type busbar 4 through the first switch 13 or is connected to the second tube-type busbar 9 through the second switch 14, and the second group of incoming and outgoing lines is connected to the first tube-type busbar 4 through the first switch 15 or is connected to the second tube-type busbar 9 through the second switch 16.

[0011] Furthermore, the first switch and the second switch in each group of incoming and outgoing lines are single-pole isolating switches.

[0012] The number of grounding switches of the single-pole disconnector is set according to the maintenance requirements, which is convenient for grounding the tubular busbar and ensuring maintenance safety. For example, the first single-pole disconnector and the fourth single-pole disconnector each include two grounding switches, the second single-pole disconnector and the third single-pole disconnector each include one grounding switch, and the single-pole disconnectors in the incoming and outgoing lines each include two grounding switches.

[0013] Furthermore, the busbar is supported by a single-stage disconnector, thereby reducing the number of tubular busbar support columns. Normally, the distance between two connected groups of incoming and outgoing lines is not less than 15 meters.

Claims

1. The layout structure of the electrical equipment in the switch station, wherein the electrical equipment is in three groups, corresponding to the three phases of the three-phase electricity, and each group of electrical equipment includes a first tubular busbar and a second tubular busbar arranged in parallel, characterized in that: Each group of electrical equipment also includes a first lightning arrester, a first voltage transformer, a first single-pole disconnector, a second single-pole disconnector, a current transformer, a single-phase circuit breaker, a third single-pole disconnector, a fourth single-pole disconnector, a second lightning arrester, a second voltage transformer and multiple groups of incoming and outgoing lines; the first lightning arrester and the first voltage transformer are both connected to one end of the first single-pole disconnector, the other end of the first single-pole disconnector is connected to one end of the first tubular busbar, the other end of the first tubular busbar is connected to one end of the second single-pole disconnector, and the other end of the second single-pole disconnector is connected to one end of the first tubular busbar. One end of the current transformer is connected, the other end of the current transformer is connected to one end of the single-phase circuit breaker, the other end of the single-phase circuit breaker is connected to one end of the third single-pole disconnector, the other end of the third single-pole disconnector is connected to one end of the second tubular busbar, the other end of the second tubular busbar is connected to one end of the fourth single-pole disconnector, and the other end of the fourth single-pole disconnector is respectively connected to the second lightning arrester and the second voltage transformer; each group of incoming and outgoing lines includes a first switch and a second switch, which is connected to the first tubular busbar through the first switch or connected to the second tubular busbar through the second switch.

2. The switch station electrical equipment arrangement structure according to claim 1, characterized in that: The first single-pole disconnector and the fourth single-pole disconnector each include two grounding switches, and the second single-pole disconnector and the third single-pole disconnector each include one grounding switch.

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