Outdoor power distribution device arrangement structure based on 220kV transformer substation

Abstract

The invention provides an outdoor power distribution device arrangement structure based on a 220kV transformer substation, which comprises an air cooling system, a transformer and 220kV GIS equipment, and is characterized in that the air cooling system comprises a steam turbine steam exhaust device, a steam exhaust pipeline and an air cooling condenser, the steam turbine steam exhaust device is arranged on the ground, and the air cooling condenser is arranged on a high overhead cooling platform; the steam turbine steam exhaust device is connected with the air cooling condenser through a steam exhaust pipeline; the transformer is electrically connected with the 220kV GIS equipment, the transformer and the 220kV GIS equipment are both arranged on the ground below the high overhead cold platform, the 220kV GIS equipment is arranged in the metal shell in a closed mode, and the metal shell is filled with SF6 insulating gas. The air cooling system of the steam turbine generator unit, the transformer and the 220kV GIS equipment are reasonably arranged in space, the occupied area is smaller, and land resources are fully saved.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical equipment, and in particular to an outdoor power distribution device arrangement structure based on a 220kV substation. Background Art

[0002] At present, the standard design of the 220kV substation in the traditional thermal power plant adopts the AIS support tube busbar scheme. The 220kV distribution device is designed according to the traditional AIS standard. The entire interval layout needs to be 91 meters long and 48 meters wide, covering an area of ​​4,368 square meters. This open layout of equipment occupies a large area, and the distribution device is relatively weak in terms of high bracket seismic resistance. At the same time, the operation of the equipment is greatly affected by the environment such as dirt and wind speed. The insulator needs to be cleaned regularly, the operation safety and reliability are relatively low, and the operation and maintenance workload is large. In addition, the layout of the air cooling system of the steam turbine generator set in the traditional thermal power plant also requires a large area of ​​land resources. Therefore, how to reasonably arrange the 220kV distribution device and the air cooling system in space, and maximize the land resource conservation under the premise of ensuring the safe and stable operation requirements of the system equipment, is a technical problem that technical personnel in this field need to solve. Summary of the invention

[0003] The purpose of the present invention is to provide an outdoor power distribution device layout structure based on a 220kV substation, which can solve the problems of unreasonable layout of traditional 220kV power distribution devices and air cooling systems and large floor space.

[0004] The present invention provides an outdoor power distribution device arrangement structure based on a 220kV substation, comprising an air cooling system, a transformer and a 220kVGIS device, wherein the air cooling system comprises a steam turbine exhaust device, an exhaust pipe and an air-cooled condenser, wherein the steam turbine exhaust device is arranged on the ground, the air-cooled condenser is arranged on an elevated air cooling platform, and the steam turbine exhaust device is connected to the air-cooled condenser through the exhaust pipe; the transformer is electrically connected to the 220kVGIS device, the transformer and the 220kVGIS device are both arranged on the ground below the elevated air cooling platform, and the 220kVGIS device is enclosed in a metal casing, and the metal casing is filled with SF6 insulating gas.

[0005] According to an outdoor power distribution device layout structure based on a 220kV substation provided by the present invention, the air-cooled condenser includes a steam distribution pipe and a heat exchange tube bundle, the exhaust pipe is connected to the steam distribution pipe, and the steam distribution pipe is connected to the heat exchange tube bundle.

[0006] According to an outdoor power distribution device arrangement structure based on a 220kV substation provided by the present invention, the heat exchange tube bundle is installed and arranged on the elevated air-cooling platform, and the steam distribution pipe is arranged on the top of the heat exchange tube bundle.

[0007] According to a layout structure of an outdoor power distribution device based on a 220kV substation provided by the present invention, the exhaust pipe includes a transverse exhaust pipe, a vertical exhaust pipe and an L-shaped connecting pipe connected in sequence, the transverse exhaust pipe is connected to the outlet of the steam turbine exhaust device through an expansion joint, and the L-shaped connecting pipe is connected to the steam distribution pipe; an electric butterfly valve is also provided on the exhaust pipe.

[0008] According to an outdoor power distribution device layout structure based on a 220kV substation provided by the present invention, a plurality of concrete support columns are provided at the bottom of the elevated air-cooling platform, and the top of each of the concrete support columns is connected and fixed to the elevated air-cooling platform via a connecting piece.

[0009] According to an outdoor power distribution device layout structure based on a 220kV substation provided by the present invention, the elevated air-cooling platform includes a steel structure support frame and a plurality of fan units installed on the steel structure support frame, and the fan unit is arranged at the bottom of the air-cooled condenser.

[0010] According to an outdoor power distribution device arrangement structure based on a 220kV substation provided by the present invention, the top height of the concrete support column is 28 to 30 meters, and the top height of the elevated air-cooling platform is 34 to 36 meters.

[0011] According to a layout structure of an outdoor power distribution device based on a 220kV substation provided by the present invention, the transformer includes a first main transformer, a second main transformer and a start-up transformer, the 220kV GIS equipment includes a first main transformer compartment, a second main transformer compartment, a start-up transformer compartment, a first outgoing line compartment, a second outgoing line compartment, a bus-tie compartment and a bus voltage transformer compartment, the first main transformer is electrically connected to the first main transformer compartment, the second main transformer is electrically connected to the second main transformer compartment, and the start-up transformer is electrically connected to the start-up transformer compartment.

[0012] According to an outdoor power distribution device layout structure based on a 220kV substation provided by the present invention, the first main transformer bay includes a circuit breaker, a first current transformer, a second current transformer, a fast grounding switch, a single-side disconnector, a three-position isolating grounding switch and a lightning arrester, the fast grounding switch and the lightning arrester are respectively connected to the output line of the first main transformer, the fast grounding switch, the first current transformer, the circuit breaker and the second current transformer are connected in sequence, the second current transformer and the single-side disconnector are connected to the first main bus in sequence, and the second current transformer and the three-position isolating grounding switch are connected to the second main bus in sequence.

[0013] According to a layout structure of an outdoor power distribution device based on a 220kV substation provided by the present invention, the first main transformer compartment also includes a control cabinet, and the control cabinet is electrically connected to the circuit breaker, the first current transformer, the second current transformer, the fast grounding switch, the single-side isolating switch, the three-position isolating grounding switch and the lightning arrester respectively.

[0014] The outdoor power distribution device layout structure based on the 220kV substation provided by the present invention performs reasonable spatial layout of the air cooling system, the transformer and the 220kVGIS equipment, wherein the air cooling system includes a steam turbine exhaust device, an exhaust pipe and an air-cooled condenser, the steam turbine exhaust device is arranged on the ground, the air-cooled condenser is arranged on an elevated air cooling platform, and the steam turbine exhaust device is connected to the air-cooled condenser through the exhaust pipe; the transformer is electrically connected to the 220kVGIS equipment, and the transformer and the 220kVGIS equipment are arranged on the ground below the elevated air cooling platform. Therefore, the space under the elevated air-cooled platform can be effectively utilized to reduce the floor space. Since the 220kV distribution device adopts the GIS layout, it can greatly reduce the land area compared with the traditional AIS layout, thereby saving land resources to the maximum extent. Since the 220kV GIS equipment is enclosed in a metal casing and filled with SF6 insulating gas with a certain pressure, the operating equipment is effectively isolated from the outside world, which not only improves the safety and reliability of equipment operation, but also reduces the operation and maintenance workload after the subsequent project is put into production. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1It is a schematic diagram of the end structure of the outdoor power distribution device arrangement structure based on a 220kV substation of the present invention;

[0017] Figure 2 It is a schematic diagram of the plane layout of the transformer and 220kVGIS equipment in the outdoor power distribution device layout structure based on the 220kV substation of the present invention;

[0018] Figure 3 It is a structural schematic diagram of the first main transformer bay in the outdoor power distribution device layout structure based on a 220kV substation of the present invention.

[0019] Description of reference numerals:

[0020] 100, air cooling system; 200, transformer; 300, 220kVGIS equipment; 400, elevated air cooling platform; 500, concrete support column;

[0021] 1. Steam turbine exhaust device; 2. Exhaust pipe; 3. Steam distribution pipe; 4. Heat exchange tube bundle; 5. First main transformer; 6. Second main transformer; 7. Start-up transformer; 8. First main transformer compartment; 9. Second main transformer compartment; 10. Start-up transformer compartment; 11. First outgoing line compartment; 12. Second outgoing line compartment; 13. Busbar compartment; 14. Busbar voltage transformer compartment;

[0022] CB, circuit breaker; CT1, first current transformer; CT2, second current transformer; FES, fast earthing switch; DS, single-side disconnector; DES, three-position disconnector and earthing switch; LA, lightning arrester; LCP, control cabinet; BUS1, first main bus; BUS2, second main bus. DETAILED DESCRIPTION

[0023] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0025] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] like Figures 1 to 3 As shown, the layout structure of the outdoor power distribution device based on the 220kV substation according to the embodiment of the present invention includes an air cooling system 100, a transformer 200 and a 220kVGIS device 300. The air cooling system 100 includes a steam turbine exhaust device 1, an exhaust pipe 2 and an air condenser, wherein the steam turbine exhaust device 1 is arranged on the ground, the air condenser is arranged on an elevated air cooling platform 400, and the steam turbine exhaust device 1 is connected to the air condenser through the exhaust pipe 2. The transformer 200 is electrically connected to the 220kVGIS device 300, and the transformer 200 and the 220kVGIS device 300 are both arranged on the ground below the elevated air cooling platform 400, so that the space below the elevated air cooling platform 400 can be effectively utilized to reduce the floor area.

[0027] Since the 220kV power distribution device in this embodiment adopts the GIS layout method, compared with the traditional AIS layout method, the land area can be greatly reduced, thereby saving land resources to the greatest extent.

[0028] Among them, the 220kVGIS equipment 300 is enclosed in a metal casing, which is reliably grounded and filled with SF6 insulating gas with a certain pressure, so that the operating equipment is effectively isolated from the outside world, which not only improves the safety and reliability of equipment operation, but also reduces the operation and maintenance workload after the subsequent project is put into production.

[0029] Therefore, the outdoor power distribution device layout structure based on the 220kV substation of the embodiment of the present invention arranges the air cooling system 100 of the steam turbine generator set, the transformer 200, and the 220kV GIS equipment 300 in a reasonable space, occupies a smaller area, and achieves the purpose of fully saving land resources.

[0030] Specifically, the air-cooled condenser includes a steam distribution pipe 3 and a heat exchange tube bundle 4, the exhaust pipe 2 is connected to the steam distribution pipe 3, and the steam distribution pipe 3 is connected to the heat exchange tube bundle 4. The heat exchange tube bundle 4 is installed and arranged on an elevated air cooling platform 400, and the steam distribution pipe 3 is arranged on the top of the heat exchange tube bundle 4.

[0031] The exhaust pipe 2 includes a transverse exhaust pipe, a vertical exhaust pipe and an L-shaped connecting pipe connected in sequence, the transverse exhaust pipe is connected to the outlet of the steam turbine exhaust device 1 through an expansion joint, and the L-shaped connecting pipe is connected to the steam distribution pipe 3. An electric butterfly valve is also provided on the exhaust pipe 2.

[0032] In the embodiment of the present invention, the air cooling system 100 of the steam turbine generator set adopts a direct air cooling system, and the working process of the air cooling system 100 is as follows: the steam discharged from the steam turbine exhaust device 1 enters the air condenser through the large diameter exhaust pipe 2, and the steam exchanges surface heat with the ambient air in the air condenser and condenses into condensate. However, the condensate is collected by the condensate pipe, discharged to the steam turbine exhaust device 1, and then pressurized to the condensate system by the condensate pump, thereby achieving the purpose of saving water resources.

[0033] Specifically, a plurality of concrete support columns 500 are provided at the bottom of the elevated air cooling platform 400, and the top of each concrete support column 500 is connected and fixed to the elevated air cooling platform 400 through a connecting piece. The elevated air cooling platform 400 includes a steel structure support frame and a plurality of fan units installed on the steel structure support frame, and the fan units are arranged at the bottom of the air condenser. That is, the use of a plurality of concrete support columns 500 and the elevated air cooling platform 400 can realize reliable support and installation of the air condenser.

[0034] Among them, the top height of the concrete support column 500 is 28 to 30 meters, and the top height of the elevated air-cooling platform 400 is 34 to 36 meters, so that the air-cooled condenser can be fixed at a reliable height position to ensure the reliable operation and maintenance of the air-cooling system 100.

[0035] Specifically, the transformer 200 includes a first main transformer 5, a second main transformer 6 and a start-up transformer 7, and the 220kV GIS equipment 300 includes a first main transformer bay 8, a second main transformer bay 9, a start-up transformer bay 10, a first outgoing line bay 11, a second outgoing line bay 12, a bus-tie bay 13 and a bus voltage transformer bay 14. The first main transformer 5 is electrically connected to the first main transformer bay 8, the second main transformer 6 is electrically connected to the second main transformer bay 9, and the start-up transformer 7 is electrically connected to the start-up transformer bay 10. Among them, the first main transformer bay 8, the second main transformer bay 9, the start-up transformer bay 10, the first outgoing line bay 11, the second outgoing line bay 12, the bus-tie bay 13 and the bus voltage transformer bay 14 are all electrically connected to the two main busbars BUS.

[0036] Among them, the first main transformer bay 8 includes a circuit breaker CB, a first current transformer CT1, a second current transformer CT2, a fast earthing switch FES, a single-side isolating switch DS, a three-position isolating earthing switch DES and a lightning arrester LA. The fast earthing switch FES and the lightning arrester LA are respectively connected to the output line of the first main transformer 5, the fast earthing switch FES, the first current transformer CT1, the circuit breaker CB and the second current transformer CT2 are connected in sequence, the second current transformer CT2 and the single-side isolating switch DS are connected to the first main bus BUS1 in sequence, and the second current transformer CT2 and the three-position isolating earthing switch DES are connected to the second main bus BUS2 in sequence.

[0037] Among them, the first main transformer bay 8 also includes a control cabinet LCP, which is electrically connected to the circuit breaker CB, the first current transformer CT1, the second current transformer CT2, the fast earthing switch FES, the single-side isolating switch DS, the three-position isolating earthing switch DES and the lightning arrester LA, and is used to control the execution working status of each component respectively.

[0038] Among them, the structures of the second main transformer bay 9, the standby transformer bay 10, the first outgoing line bay 11, the second outgoing line bay 12 and the busbar bay 13 are the same as those of the first main transformer bay 8. The structure of the busbar voltage transformer bay 14 is basically the same as that of the first main transformer bay 8, except that the current transformer in the first main transformer bay 8 is replaced by a voltage transformer.

[0039] A line-out structure is connected and arranged on the right side of the 220kV GIS device 300 . The line-out structure is installed on a concrete support column 500 , and the line-out structure is installed on the concrete support column 500 at a height of 15 meters from the ground.

[0040] Since the embodiment of the present invention adopts an air cooling system combined with a GIS power distribution device layout, the layout of the 220kV GIS equipment 300 needs to be 48.8 meters long, 36.25 meters wide, and covers an area of ​​1,769 square meters. Compared with the traditional AIS layout, it can save land by 59.5%, greatly reducing the floor space.

[0041] Since the circuit breakers, current transformers, voltage transformers, fast earthing switches, single-side disconnectors, three-position isolating earthing switches and lightning arresters in the 220kV GIS equipment 300, as well as the output lines of the transformer, double busbars, GIS outgoing lines, etc. are all enclosed in a metal casing, the operating equipment of the GIS power distribution device can be effectively isolated from the outside world, ensuring the safe and stable operation requirements of the system equipment.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An outdoor power distribution device layout structure based on a 220kV substation, characterized in that: It includes an air-cooling system, a transformer and 220kVGIS equipment, wherein the air-cooling system includes a steam turbine exhaust device, an exhaust pipe and an air-cooled condenser, wherein the steam turbine exhaust device is arranged on the ground, the air-cooled condenser is arranged on an elevated air-cooled platform, and the steam turbine exhaust device is connected to the air-cooled condenser through the exhaust pipe; the transformer is electrically connected to the 220kVGIS equipment, the transformer and the 220kVGIS equipment are both arranged on the ground below the elevated air-cooled platform, and the 220kVGIS equipment is enclosed in a metal casing, and the metal casing is filled with SF6 insulating gas.

2. The outdoor power distribution device arrangement structure based on a 220kV substation according to claim 1 is characterized in that: The air-to-condenser comprises a steam distribution pipe and a heat exchange tube bundle, the exhaust pipe is connected to the steam distribution pipe, and the steam distribution pipe is connected to the heat exchange tube bundle.

3. The outdoor power distribution device arrangement structure based on a 220kV substation according to claim 2 is characterized in that: The heat exchange tube bundle is installed and arranged on the elevated air cooling platform, and the steam distribution pipe is arranged on the top of the heat exchange tube bundle.

4. The outdoor power distribution device arrangement structure based on a 220kV substation according to claim 2 is characterized in that: The exhaust pipe includes a transverse exhaust pipe, a vertical exhaust pipe and an L-shaped connecting pipe which are connected in sequence. The transverse exhaust pipe is connected to the outlet of the steam turbine exhaust device through an expansion joint, and the L-shaped connecting pipe is connected to the steam distribution pipe. An electric butterfly valve is also provided on the exhaust pipe.

5. The outdoor power distribution device arrangement structure based on a 220kV substation according to claim 1 is characterized in that: A plurality of concrete support columns are provided at the bottom of the elevated air-cooling platform, and the top of each of the concrete support columns is respectively connected and fixed to the elevated air-cooling platform via a connecting piece.

6. The outdoor power distribution device arrangement structure based on 220kV substation according to claim 5 is characterized in that: The elevated air-cooling platform includes a steel structure support frame and a plurality of fan units installed on the steel structure support frame, and the fan units are arranged at the bottom of the air-cooled condenser.

7. The outdoor power distribution device arrangement structure based on 220kV substation according to claim 5 is characterized in that: The top height of the concrete support column is 28 to 30 meters, and the top height of the elevated air-cooling platform is 34 to 36 meters.

8. The outdoor power distribution device arrangement structure based on 220kV substation according to claim 1 is characterized in that: The transformers include a first main transformer, a second main transformer and a start-up transformer. The 220kV GIS equipment includes a first main transformer compartment, a second main transformer compartment, a start-up transformer compartment, a first outgoing line compartment, a second outgoing line compartment, a bus-tie compartment and a bus voltage transformer compartment. The first main transformer is electrically connected to the first main transformer compartment, the second main transformer is electrically connected to the second main transformer compartment, and the start-up transformer is electrically connected to the start-up transformer compartment.

9. The outdoor power distribution device arrangement structure based on 220kV substation according to claim 8 is characterized in that: The first main transformer bay includes a circuit breaker, a first current transformer, a second current transformer, a fast grounding switch, a single-side isolating switch, a three-position isolating grounding switch and a lightning arrester. The fast grounding switch and the lightning arrester are respectively connected to the output line of the first main transformer, the fast grounding switch, the first current transformer, the circuit breaker and the second current transformer are connected in sequence, the second current transformer and the single-side isolating switch are connected to the first main bus in sequence, and the second current transformer and the three-position isolating grounding switch are connected to the second main bus in sequence.

10. The outdoor power distribution device arrangement structure based on 220kV substation according to claim 9 is characterized in that: The first main transformer compartment also includes a control cabinet, which is electrically connected to the circuit breaker, the first current transformer, the second current transformer, the fast grounding switch, the single-side isolating switch, the three-position isolating grounding switch and the lightning arrester respectively.

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