CN116260067A - 72.5kV single-tank type environment-friendly gas insulation GIS structure for offshore wind power tower - Google Patents
72.5kV single-tank type environment-friendly gas insulation GIS structure for offshore wind power tower Download PDFInfo
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- CN116260067A CN116260067A CN202310297809.4A CN202310297809A CN116260067A CN 116260067 A CN116260067 A CN 116260067A CN 202310297809 A CN202310297809 A CN 202310297809A CN 116260067 A CN116260067 A CN 116260067A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
- H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
- H02B13/035—Gas-insulated switchgear
- H02B13/045—Details of casing, e.g. gas tightness
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/20—Bus-bar or other wiring layouts, e.g. in cubicles, in switchyards
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/50—Pedestal- or pad-mounted casings; Parts thereof or accessories therefor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/54—Anti-seismic devices or installations
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
- H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
- H02B13/035—Gas-insulated switchgear
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
- H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
- H02B13/035—Gas-insulated switchgear
- H02B13/055—Features relating to the gas
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Gas-Insulated Switchgears (AREA)
Abstract
The utility model discloses a 72.5kV single-tank type environment-friendly gas insulation GIS structure for an offshore wind power tower, which is characterized in that a generator side transformer of an upper fan is connected, the lower side of the generator side transformer is connected with sea cables at two sides of the wind power tower, a second cavity for establishing a second-level pressure difference improves the gas pressure intensity and insulation capacity in an insulation cylinder, and the problem that the mechanical life of the existing vacuum bellows technology in a 5-6 Mpa high-pressure gas environment is difficult to reach standards is solved; the three-station switch adopts an innovative L-shaped direct-acting double-contact structure, and fully utilizes the three-dimensional space size; the insulating disc adopts a dielectric constant functional gradient material to improve the overall insulating performance; the vibration-resistant base combining the gas spring and the hydraulic cylinder is adopted to realize vibration absorption and energy consumption; the insulating gas adopts clean air, accords with the carbon neutralization policy, is the development direction in the future, integrates all high-voltage switches in a jar body, and the size reduces by a wide margin, compact structure saves area, is convenient for arrange in an offshore wind turbine tower section of thick bamboo, and the risk point of gas leakage, electric leakage is few, possesses the cost advantage.
Description
Technical Field
The utility model relates to the field of power equipment, in particular to a 72.5kV single-tank type environment-friendly gas insulation GIS structure for an offshore wind power tower.
Background
Aiming at large-capacity and remote offshore wind power output projects, the single-machine capacity of a fan is continuously improved, the voltage level of a wind power plant current collection system is also increased, the current maximum capacity is 12MW, and 15MW or even 20MW offshore wind turbines can be generated in the future. In response to the technical trend of wind turbines of 10MW and above in the future, a current collecting scheme of a 72.5kV offshore wind power GIS (gas insulated switchgear) will become the mainstream, and the mature scheme of the current collecting switch for the wind tower is a 35kV ring main unit, and the voltage level cannot meet the requirements; on the other hand, the land high-voltage 72.5kVGIS arrangement mode cannot meet the system wiring mode of the offshore wind power tower.
In order to solve the problems, as disclosed in chinese patent publication No. CN215071312U, a three-phase common box type GIS structure for a wind power tower is disclosed, which includes a control box, a circuit breaker, a first isolation grounding switch, a second isolation grounding switch, a third isolation grounding switch, a first current transformer and a voltage transformer, which are in telecommunication connection with the control box; the first isolation grounding switch and the second isolation grounding switch are arranged in the vertical direction, and the third isolation grounding switch is arranged in the horizontal direction; a first cable terminal electrically connected is arranged at the lower part of the first isolation grounding switch; the lower part of the second isolation grounding switch is provided with a second cable terminal which is electrically connected; a third cable terminal electrically connected is arranged on the second current transformer; the first cable termination and the second cable termination are wired down and the third cable termination is wired up. The GIS structure reduces the space occupied by bending the cable, has compact structure and small occupied area, and is convenient to be arranged in the fan tower.
Another example is that chinese patent publication No. CN113970527a discloses an unmanned inspection method in a GIS room of a booster station on the sea of a wind farm, which belongs to the technical field of unmanned inspection of booster stations. By using the unmanned inspection robot, SF6 gas concentration and WIFI signal intensity are measured by controlling the unmanned inspection robot to move to different position points, the relative distance between the position points is obtained based on the received WIFI signal intensity, and the space coordinates of the different position points are calculated, so that the space positioning of the inspection robot is realized; after obtaining the gas concentration values at different coordinates, calculating the gas concentration at any position by utilizing a gas diffusion theory; and correcting the gas diffusion model by utilizing the residual error of the measured value and the estimated value to obtain accurate calculation data, and further obtaining an indoor gas concentration distribution map, wherein the position with the maximum concentration is the gas leakage point. The device used by the utility model is simple, the operation cost is low, the accurate monitoring of SF6 concentration at all positions in the GIS room of the offshore booster station can be realized through unmanned inspection, and the operation safety and stability of the offshore booster station are ensured.
At present, the existing gas insulation structure for the offshore wind power tower barrel has the following defects: the third cable terminal of the offshore wind power GIS scheme of the first patent adopts a single-phase box-separating structure, the third cable terminal comprises three single-phase box-separating sub-cable terminals, the scheme of splicing a plurality of functional boxes is adopted, one more splicing link is provided with one more risk point of air leakage and insulation failure, one more space is required to be occupied, and the cost of one more splicing component is increased. The second patent adopts SF6 gas as an insulating medium, which does not meet the environmental protection requirement, and the prior art still needs to be improved.
Disclosure of Invention
Aiming at the defects of the prior art, the utility model provides a 72.5kV single-tank type environment-friendly gas insulation GIS structure for an offshore wind power tower, which aims to solve the problems.
In order to achieve the above purpose, the utility model is realized by the following technical scheme:
a72.5 kV single-tank type environment-friendly gas insulation GIS structure for an offshore wind power tower mainly comprises the following parts: the novel high-voltage power supply comprises a tank body, a first cable chamber, a second cable chamber, a third cable chamber, a first three-station mechanism chamber, a second three-station mechanism chamber, a third three-station mechanism chamber, a breaker mechanism chamber, a junction control chamber and a base, wherein the tank body comprises a first three-station switch, a second three-station switch, a third three-station switch, a breaker switch, a first bus, a second bus, a third bus, a first insulation wire outlet disc, a second insulation wire outlet disc, a third insulation wire outlet disc, a fourth insulation support disc and a top cover; the circuit breaker is connected to first three station switch, second three station switch, third three station switch one end, and the other end is connected to first insulating wire take-out reel, second insulating wire take-out reel, third insulating wire take-out reel through first busbar, second busbar, third busbar respectively, constitutes high-pressure primary main loop part, installs in single sealed tank body.
Further, the first insulating wire outgoing disc, the second insulating wire outgoing disc, the third insulating wire outgoing disc and the top cover are provided with sealing rings which are arranged on the tank body through bolts, an independent first cavity is formed among the insulating cylinder, the wire outgoing conducting seat, the end face of the vacuum arc-extinguishing chamber shell and the first corrugated pipe, the sealing rings are arranged between the two connecting end faces to make airtight seal, clean air with the pressure of 2-3 Mpa is filled, and the relatively low pressure is maintained to protect the vacuum bubbling end corrugated pipe.
Further, the first three-position switch is composed of a first insulating supporting disc, a first isolating switch supporting seat, a first grounding switch grounding seat and a first isolating switch moving contact, the first three-position switch adopts an L-shaped direct-movement double-contact structure, and the direct-movement double-contact is driven by a single operation shaft.
Further, the second three-position switch is composed of a second insulating supporting disc, a second isolating switch supporting seat, a second grounding switch moving end and a second isolating switch moving contact.
Further, the third three-position switch is composed of a third insulating supporting disc, a third isolating switch supporting seat, a third grounding switch moving end and a third isolating switch moving contact.
Further, the breaker switch consists of an insulating cylinder, a breaker outlet seat, a breaker vacuum arc-extinguishing chamber and a switch static end support.
Further, the insulating cylinder, the second corrugated pipe and the tank body top cover form a second cavity, the air pressure of the second cavity can be overlapped on the basis of the air pressure of the first cavity, the pressure difference between the cavities is smaller than the maximum tolerance pressure of the second corrugated pipe, and the maximum insulating gas can be filled with 5 Mpa.
Further, a first cable chamber, a second cable chamber, a third cable chamber, a breaker mechanism chamber, a first three-station mechanism chamber, a second three-station mechanism chamber, a third three-station mechanism chamber and a convergence control chamber are arranged outside the tank body.
Further, the base is arranged below the tank body, the base is divided into two layers, the top layer is a section steel base formed by welding I-shaped section steel, gas springs are respectively arranged at four corners of the bottom of the section steel frame, a plurality of hydraulic cylinders are arranged on the periphery of each gas spring, the hydraulic rods are arranged in the vertical direction, and the hydraulic cylinders and the gas springs can move up and down.
Further, the fourth insulating supporting disc is arranged on the tank body, a switch static end support is arranged on the fourth insulating supporting disc, the upper end of the switch static end support is electrically connected with the static end of the vacuum arc-extinguishing chamber of the circuit breaker, the movable end of the vacuum arc-extinguishing chamber of the circuit breaker is electrically connected with the circuit breaker outlet seat, an insulating cylinder is arranged on the circuit breaker outlet seat, and the upper end of the insulating cylinder is clamped on the end cover.
Compared with the prior art, the utility model has the beneficial effects that: a72.5 kV single-tank type environment-friendly gas insulation GIS structure for an offshore wind power tower is characterized in that a generator side transformer of an upper fan is connected, and the lower side of the generator side transformer is connected with sea cables at two sides of the wind power tower. The second cavity for establishing the second-level pressure difference improves the gas pressure intensity and the insulating capacity in the insulating cylinder, and solves the problem that the mechanical life of the existing vacuum bellows technology is difficult to reach the standard in a high-pressure gas environment of 5-6 Mpa; the three-station switch adopts an innovative L-shaped direct-acting double-contact structure, and fully utilizes the three-dimensional space size; the insulating disc adopts a dielectric constant functional gradient material FGM, so that the overall insulating performance is improved; the vibration-resistant base combining the gas spring and the hydraulic cylinder is adopted to realize vibration absorption and energy consumption; the insulating gas adopts clean air, is the development direction in the future, integrates all high-voltage switches in a jar body, and the size reduces by a wide margin, compact structure saves area, is convenient for arrange in an offshore wind turbine tower section of thick bamboo, and the risk point of gas leakage, electric leakage is few, possesses the cost advantage.
Drawings
FIG. 1 is a cross-sectional view of a 72.5kV single-tank type environment-friendly gas insulation GIS structure for an offshore wind power tower;
FIG. 2 is an external view of a 72.5kV single-tank type environment-friendly gas insulation GIS structure for an offshore wind power tower;
FIG. 3 is a one-time scheme diagram of a 72.5kV single-tank type environment-friendly gas insulation GIS structure for an offshore wind power tower;
FIG. 4 is a schematic diagram of a 72.5kV single-tank type environment-friendly gas insulation GIS structure base structure for an offshore wind power tower;
FIG. 5 is a schematic diagram of dielectric constant gradient of an insulating outlet disc of a 72.5kV single-tank type environment-friendly gas insulation GIS structure for an offshore wind turbine tower;
FIG. 6 is a diagram showing the opening of an L-shaped first three-station switch of a 72.5kV single-tank type environment-friendly gas insulation GIS structure for an offshore wind power tower;
FIG. 7 is a diagram showing the grounding of an L-shaped first three-station switch of a 72.5kV single-tank type environment-friendly gas insulation GIS structure for an offshore wind power tower;
FIG. 8 is a switching-on diagram of an L-shaped first three-station switch of a 72.5kV single-tank type environment-friendly gas insulation GIS structure for an offshore wind power tower;
FIG. 9 is a cross section of a 72.5kV single-tank type environment-friendly gas insulated GIS structure breaker for an offshore wind turbine tower; 104 a-first cavity, 104 b-second cavity, 104 c-vacuum cavity, 1040-breaker moving contact, 1041-insulating cylinder, 1045-first corrugated pipe, 1046-second corrugated pipe, 1047-outgoing line conducting seat, 1048-insulating pull rod and 1049-tank body top cover.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.
The utility model provides a technical scheme that: a72.5 kV single-tank type environment-friendly gas insulation GIS structure for an offshore wind power tower mainly comprises the following parts: the novel high-voltage power supply device comprises a tank body 1, a first cable chamber 2, a second cable chamber 3, a third cable chamber 4, a first three-position mechanism chamber 5, a second three-position mechanism chamber 6, a third three-position mechanism chamber 7, a breaker mechanism chamber 8, a sink control chamber 9 and a base 10, wherein the tank body 1 comprises a first three-position switch 101, a second three-position switch 102, a third three-position switch 103, a breaker switch 104, a first bus 105, a second bus 106, a third bus 107, a first insulated wire outlet disc 108, a second insulated wire outlet disc 109, a third insulated wire outlet disc 110, a fourth insulated support disc 111 and a top cover 112; one end of the first three-position switch 101, the second three-position switch 102 and the third three-position switch 103 is connected with the breaker switch 104, and the other end is connected to the first insulated wire outgoing disc 108, the second insulated wire outgoing disc 109 and the third insulated wire outgoing disc 110 through the first bus 105, the second bus 106 and the third bus 107 respectively, so as to form a high-voltage primary main loop part, and the high-voltage primary main loop part is installed in the single sealed tank body 1.
The first insulating wire outlet disc 108, the second insulating wire outlet disc 109, the third insulating wire outlet disc 110 and the top cover 112 are provided with sealing rings and are arranged on the tank body 1 through bolts to form a sealed first cavity, and the first cavity is filled with clean air of 5-6 Mpa as insulating gas. The insulated wire coil is made of advanced dielectric constant Functional Gradient Material (FGM), wherein FGM refers to a structure that fillers (Si 0, al20g, tiO, srTiOg) with different dielectric strengths are distributed at different positions of an insulated base material (usually epoxy resin) to achieve dielectric constant gradient arrangement of an insulating piece, and the preparation method of the FGM insulator currently comprises a lamination method, a centrifugation method, 3D printing and a flexible pouring method. According to the use scenario of the basin-type insulator, the electric field near the electrode 300 is strongest, the relative permittivity of the insulator surface near the electrode 300 is increased (epsilon=10) by FGM, and then the creeping discharge can be reduced and the basin-type insulator can be reduced in size by creeping down (epsilon=4). Generally, the size of the disc insulator determines the size of the GIS air chamber. The size of the disk insulator will be reduced and the size of the GIS air chamber will be reduced.
The breaker switch 104 is composed of an insulating cylinder 1041, a breaker outlet seat 1042, a breaker vacuum arc-extinguishing chamber 1043 and a switch static end support 1044. The utility model uses an insulating cylinder 1041, an outgoing line conducting seat 1047, an independent first cavity 104a formed between the end face of a shell of a vacuum arc-extinguishing chamber 1043 of the circuit breaker and a first corrugated pipe 1045, a sealing ring is arranged between two connecting end faces for air sealing, clean air with the air pressure of 2-3 Mpa is filled, and the relatively low pressure is maintained to protect the corrugated pipe at the vacuum bubbling end, so as to solve the problem that the mechanical life of the existing vacuum bubbling corrugated pipe technology in a 5-6 Mpa high-pressure gas environment is difficult to reach standards. The second bellows 1046, the insulating cylinder 1041, and the tank top cover 1049 form a second cavity 104b, where the air pressure of the second cavity 104b may be superimposed on the air pressure of the first cavity 104a, and the pressure difference between the cavities is smaller than the maximum tolerance pressure of the second bellows 1046. The maximum insulating gas of 5Mpa can be filled, and from the angle of improving the pressure of the insulating gas, the insulating performance of the unit distance in the cavity is improved, so that the clear distance between conductors and the surface climbing distance of the insulating part can be shortened, and the whole size of the insulating part (insulating pull rod/insulating cylinder) can be reduced. The insulator structure of the circuit breaker is miniaturized.
The first cable room 2 is provided with a first cable terminal 201, the second cable room 3 is provided with a second cable terminal 301, the third cable room 4 is internally provided with a third cable terminal 401, optionally provided with a through type current transformer 202 and a rear plug type lightning arrester 302, and the cable room shell plays roles of structural support and marine environmental pollution prevention.
The first three-station mechanism chamber 5, the second three-station mechanism chamber 6, the third three-station mechanism chamber 7 and the breaker mechanism chamber 8 are provided with operating mechanisms of respective switches, and the mechanism chamber shell plays roles of structural support and marine environmental pollution prevention.
The control room 9 is provided with an electric control element, a relay protection element, a metering element and the like, and is used for controlling a circuit breaker, a first three-position switch 101, a second three-position switch 102 and a third three-position switch 103 through electric signals. The control room shell plays roles of structural support and marine environment pollution prevention.
The first three-position switch 101 is composed of a first insulating supporting plate 1011, a first isolating switch supporting seat 1012, a first grounding switch grounding seat 1013, and a first isolating switch moving contact 1014. The first three-position switch 101 adopts an L-shaped direct-acting double-contact structure, and the direct-acting double-contact is driven by a single operation shaft, so that the positions of the direct-acting single-contact three-position switch scheme are mutually exclusive and interlocked, and the situation that two switches are simultaneously closed does not exist. The main gear 206 is mounted on the main shaft of the mechanism, the main gear 206 is an incomplete straight gear, and is provided with yielding grooves which are symmetrically arranged on two sides of the secondary gear. The ground driven gear 207, the isolated driven teeth/205 are meshed with the spur gear. The ground synchronizing gear 203 is disposed inside the main gear 206, and the isolating synchronizing gear 204 is disposed outside and inside the main gear 206. The ground synchronizing gear 203 rotates synchronously with the ground driven gear 207 and meshes with the ground switch rack 202; the isolating synchronous gear 204 rotates in synchronization with the isolating driven gear 205 and meshes with the isolating switch rack 201. The grounding switch rack 202 is hard-wired to the grounding switch movable contact 1015 and the disconnector rack 201 is hard-wired to the first disconnector movable contact 1014. The grounding switch movable contact 1015 and the first isolating switch movable contact 1014 are sleeved in the first isolating switch supporting seat 1012.
Fig. 6 shows the first three-position switch 101 in a closed state, the main shaft of the mechanism drives the main gear 206 to rotate clockwise by a certain angle (65 °), drives the grounding driven gear 207, and the grounding switch gear rack group drives the grounding switch moving contact 1015 to be inserted into the first grounding switch grounding seat 1013, so as to complete grounding closing. Meanwhile, the main gear 206 is kept away from the isolating driven gear 205 by the isolating groove, and the first isolating switch moving contact 1014 is kept at the isolating position. The main gear 206 rotates in the opposite direction by the same angle and the grounding switch opens. The main gear 206 is driven by the main shaft of the mechanism to rotate anticlockwise by a certain angle (65 degrees), the isolating driven gear 205 is driven by the main shaft of the mechanism, and the isolating switch gear rack group drives the first isolating switch moving contact 1014 to be inserted into the isolating switch closing seat 1016, so that isolating closing is completed. Meanwhile, the main gear 206 is allowed to leave the grounding driven gear 207, and the grounding switch movable contact 1015 is not operated and is maintained at the grounding position. The main gear 206 rotates in the opposite direction by the same angle and the disconnector opens. The grounding diagram and the closing diagram of the L-shaped first three-position switch 101 are shown in fig. 7 and 8 respectively.
The L-shaped direct-acting double-contact three-station switch disclosed by the utility model only occupies half of the space in the X direction, and the other half of the switch turns to the Y direction, so that the structure is more beneficial to compact arrangement of a multi-switch co-box GIS structure.
The second three-position switch 102 is composed of a second insulating support disk 1021, a second isolating switch support seat 1022, a second grounding switch movable end 1023 and a second isolating switch movable contact 1024.
The third three-position switch 103 is composed of a third insulation supporting disc 1031, a third isolating switch supporting seat 1032, a third grounding switch movable end 1033 and a third isolating switch movable contact 1034.
The three-station switch is functionally divided into an isolating switch and a grounding switch, wherein the isolating switch adopts a direct-acting structure with better field intensity than a disconnecting link structure, and a moving contact directly moves out of a supporting seat of the isolating switch, enters a closing seat and is closed; the moving contact moves directly and completely into the isolating switch supporting seat, and the isolating switch is opened. The first closing seat 1016 is integrated on the circuit breaker outlet seat 1042, and the second closing seat and the third closing seat are integrated on the circuit breaker switch static end support.
The grounding switch of the first three-position switch 101 is in a slow-speed direct-acting structure, the moving end is at the high-voltage side, the grounding moving contact is switched on when completely overlapping the grounding seat 1013 of the first grounding switch, and the grounding moving contact completely enters the supporting seat 1012 of the isolating switch to be switched on.
The grounding switch of the second three-position switch 102 and the third three-position switch 103 is of a quick direct-acting structure with the capability of switching on and off short-circuit current, the moving end of the switch is arranged on the ground potential side, the grounding moving contact is completely overlapped with the second isolating switch supporting seat 1022 and the third isolating switch supporting seat 1032 to be switched on, and the grounding moving contact is switched off when being pulled to a safe insulation distance by a mechanism.
The first three-position switch 101 is arranged at the upper part and is connected with the upper conductor breaker outlet seat 1042 of the breaker switch 104, the other end is inserted with the first bus 105, the first bus 105 is fixed on the first insulation outlet coil 108 by bolts, and the first cable terminal 201 is arranged on the first insulation outlet coil 108 and connected with a fan transformer cable.
The second three-position switch 102 and the third three-position switch 103 are arranged at the lower part and symmetrically distributed at the left side and the right side of the breaker switch 104 and are connected with a static end support 1044 of the lower conductor switch of the breaker. The other ends of the first bus bar and the second bus bar are respectively inserted into a second bus bar 106 and a third bus bar 107, the second bus bar 106 and the third bus bar 107 are fixed on a second insulation wire outlet disc 109 and a third insulation wire outlet disc 110 through bolts, a second cable terminal 301 and a third cable terminal 401 are arranged on the second insulation wire outlet disc 109 and the third insulation wire outlet disc 110, and the second cable terminal and the third cable terminal 401 are connected with sea cable ring networks on two sides of the wind tower.
The first isolating switch supporting seat 1012 is connected with the first insulating supporting disk 1011 through bolts, the second isolating switch supporting seat 1022 is connected with the second insulating supporting disk 1021 through bolts, the third isolating switch supporting seat 1032 is connected with the third insulating supporting disk 1031 through bolts, and the first insulating supporting disk 1011, the second insulating supporting disk 1021 and the third insulating supporting disk 1031 are connected with the tank through bolts. The first insulating support disk 1011, the second insulating support disk 1021, the third insulating support disk 1031, and the fourth insulating support disk 111 serve as a supporting base for the isolating switch, and serve as an insulating base between the isolating switch and the can.
The fourth insulating support plate 111 is mounted on the tank body, and the static end support 1044 of the switch is mounted on the plate, so as to play a role in supporting and insulating. The upper end of the switch static end support 1044 is electrically connected with the static end of the breaker vacuum arc-extinguishing chamber 1043, the movable end of the breaker vacuum arc-extinguishing chamber 1043 is electrically connected with the breaker outlet seat 1042, and the breaker outlet seat 1042 is provided with an insulating cylinder 1041. The upper end of the insulating cylinder 1041 is clamped on the end cover, and is radially fixed. The insulating cylinder 1041 is internally provided with a mechanism cam, a contact spring and an insulating pull rod, and the insulating pull rod is connected with a vacuum bubbling end through a bolt; the mechanism cam is externally connected with a breaker mechanism to drive the breaker to be opened and closed.
The base 10 is divided into two layers, the top layer is a section steel base 1001 formed by welding I-shaped section steel and is used for connecting a tank body, gas springs 1002 are respectively arranged at four corners of the bottom of a section steel frame, a plurality of hydraulic cylinders 1003 are arranged on the periphery of each gas spring 1002, hydraulic rods of the hydraulic cylinders 1003 are arranged in the vertical direction, and the hydraulic rods of the hydraulic cylinders 1003 are used for supporting the whole machine. The hydraulic cylinder 1003 and the gas spring 1002 can move up and down, the slope of the pressure stroke curve of the hydraulic cylinder 1003 is large, if the hydraulic cylinder is used singly for shock resistance, the swing amplitude of equipment is large, and the stability of a cable interface is not facilitated, so that the hydraulic cylinder 1003 mainly plays a supporting role; the gas spring 1002 has a small slope of the pressure stroke curve, a gentle amplitude, and a strong impact resistance, but does not have a rigid supporting ability in case of air leakage of the air bag, and requires the support of the hydraulic cylinder 1003. The combined structure has low natural frequency and can effectively resist earthquake and swing. The base 10 is used for supporting the tank 1 and the cable chamber support.
The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.
Claims (10)
1. The 72.5kV single-tank type environment-friendly gas insulation GIS structure for the offshore wind power tower is characterized by comprising the following parts: the novel high-voltage power supply device comprises a tank body (1), a first cable chamber (2), a second cable chamber (3), a third cable chamber (4), a first three-station mechanism chamber (5), a second three-station mechanism chamber (6), a third three-station mechanism chamber (7), a breaker mechanism chamber (8), a sink control chamber (9) and a base (10), wherein the tank body (1) comprises a first three-station switch (101), a second three-station switch (102), a third three-station switch (103), a breaker switch (104), a first bus (105), a second bus (106), a third bus (107), a first insulating wire outlet disc (108), a second insulating wire outlet disc (109), a third insulating wire outlet disc (110), a fourth insulating support disc (111) and a top cover (112); one end of the first three-station switch (101), one end of the second three-station switch (102) and one end of the third three-station switch (103) are connected with the breaker switch (104), and the other end of the first three-station switch is connected to the first insulating wire outlet disc (108), the second insulating wire outlet disc (109) and the third insulating wire outlet disc (110) through the first bus (105), the second bus (106) and the third bus (107) respectively to form a high-voltage primary main loop part which is arranged in the single sealed tank body (1).
2. The 72.5kV single-tank type environment-friendly gas insulated GIS structure for the offshore wind power tower according to claim 1, wherein the structure is characterized in that: the breaker switch (104) is composed of an insulating cylinder (1041), a breaker outlet seat (1042), a breaker vacuum arc-extinguishing chamber (1043) and an opening Guan Jingduan support (1044).
3. The 72.5kV single-tank type environment-friendly gas-insulated GIS structure for an offshore wind power tower according to claim 2, wherein the structure is characterized in that: an independent first cavity (104 a) is formed between the shell end face of the insulating cylinder (1041), the outgoing line conducting seat (1047), the vacuum arc-extinguishing chamber (1043) of the circuit breaker and the first corrugated pipe (1045), a sealing ring is arranged between the two connecting end faces for air sealing, clean air with the air pressure of 2-3 Mpa is filled, and the relatively low pressure is maintained to protect the corrugated pipe at the vacuum bubbling end.
4. A 72.5kV single-tank type environmental protection gas insulation GIS structure for an offshore wind power tower according to claim 3, wherein: the second corrugated pipe (1046), the insulating cylinder (1041) and the tank top cover (1049) form an independent second cavity (104 b), the air pressure of the second cavity (104 b) can be overlapped on the basis of the air pressure of the first cavity (104 a), and the pressure difference between the cavities is smaller than the maximum tolerance pressure of the second corrugated pipe (1046).
5. The 72.5kV single-tank type environment-friendly gas insulated GIS structure for the offshore wind power tower according to claim 4, wherein the structure comprises the following components: the first three-position switch (101) is composed of a first insulating supporting plate (1011), a first isolating switch supporting seat (1012), a first grounding switch grounding seat (1013) and a first isolating switch moving contact (1014), the first three-position switch (101) adopts an L-shaped direct-acting double-contact structure, and the direct-acting double-contact is driven by a single operation shaft.
6. The 72.5kV single-tank type environment-friendly gas insulated GIS structure for the offshore wind power tower according to claim 5, wherein the structure is characterized in that: the second three-station switch (102) is composed of a second insulating supporting disk (1021), a second isolating switch supporting seat (1022), a second grounding switch moving end (1023) and a second isolating switch moving contact (1024).
7. The 72.5kV single-tank type environment-friendly gas insulated GIS structure for the offshore wind power tower according to claim 6, wherein the structure is characterized in that: the third three-station switch (103) is composed of a third insulation supporting disc (1031), a third isolating switch supporting seat (1032), a third grounding switch movable end (1033) and a third isolating switch movable contact (1034).
8. The 72.5kV single-tank type environment-friendly gas insulated GIS structure for the offshore wind power tower according to claim 7, wherein the structure comprises the following components: the novel solar energy collection tank is characterized in that a first cable chamber (2), a second cable chamber (3), a third cable chamber (4), a first three-station mechanism chamber (5), a second three-station mechanism chamber (6), a third three-station mechanism chamber (7), a breaker mechanism chamber (8) and a collection control chamber (9) are arranged outside the tank body (1).
9. The 72.5kV single-tank type environment-friendly gas insulated GIS structure for the offshore wind power tower according to claim 8, wherein the structure comprises the following components: the tank is characterized in that a base (10) is arranged below the tank body (1), the base (10) is divided into two layers, the top layer is a section steel base (1001) formed by welding I-shaped section steel, gas springs (1002) are respectively arranged at four corners of the bottom of the section steel frame, a plurality of hydraulic cylinders (1003) are arranged on the periphery of each gas spring (1002), the hydraulic rods are arranged in the vertical direction, and the hydraulic cylinders (1003) and the gas springs (1002) can move up and down.
10. The 72.5kV single-tank type environment-friendly gas-insulated GIS structure for an offshore wind power tower according to claim 9, wherein the structure comprises: the fourth insulating supporting disc (111) is installed on the tank body (1), a switch static end support (1044) is installed on the fourth insulating supporting disc (111), the upper end of the switch Guan Jingduan support (1044) is electrically connected with the static end of the circuit breaker vacuum arc-extinguishing chamber (1043), the movable end of the circuit breaker vacuum arc-extinguishing chamber (1043) is electrically connected with the circuit breaker outlet seat (1042), and an insulating cylinder (1041) is installed on the circuit breaker outlet seat (1042).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310297809.4A CN116260067A (en) | 2023-03-24 | 2023-03-24 | 72.5kV single-tank type environment-friendly gas insulation GIS structure for offshore wind power tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310297809.4A CN116260067A (en) | 2023-03-24 | 2023-03-24 | 72.5kV single-tank type environment-friendly gas insulation GIS structure for offshore wind power tower |
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| Publication Number | Publication Date |
|---|---|
| CN116260067A true CN116260067A (en) | 2023-06-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310297809.4A Pending CN116260067A (en) | 2023-03-24 | 2023-03-24 | 72.5kV single-tank type environment-friendly gas insulation GIS structure for offshore wind power tower |
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| Country | Link |
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| CN (1) | CN116260067A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117559276A (en) * | 2023-11-10 | 2024-02-13 | 广东明阳电气股份有限公司 | Combined electrical apparatus for offshore wind power |
-
2023
- 2023-03-24 CN CN202310297809.4A patent/CN116260067A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117559276A (en) * | 2023-11-10 | 2024-02-13 | 广东明阳电气股份有限公司 | Combined electrical apparatus for offshore wind power |
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