CN110364957B - Extension module of GIS equipment - Google Patents
Extension module of GIS equipment Download PDFInfo
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- CN110364957B CN110364957B CN201910645675.4A CN201910645675A CN110364957B CN 110364957 B CN110364957 B CN 110364957B CN 201910645675 A CN201910645675 A CN 201910645675A CN 110364957 B CN110364957 B CN 110364957B
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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
- 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
- H02B13/075—Earthing arrangements
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Abstract
The application discloses an extension module of GIS equipment, which comprises a reserved interface, a left isolation grounding submodule, a middle isolation grounding submodule and a right isolation grounding submodule, wherein the left isolation grounding submodule, the middle isolation grounding submodule and the right isolation grounding submodule are arranged on the reserved interface in sequence; the left isolation grounding sub-module, the middle isolation grounding sub-module and the right isolation grounding sub-module are connected with a main bus through respective interfaces; when the extension part is subjected to a high-voltage connection test in an extension state, because the middle contacts of the three sub-modules are grounded, one grounding protection can be formed between the live bus and the reserved interval, so that the reserved interval can not influence the normal operation of the live bus when the high voltage is applied, and the uninterrupted power supply function in the whole extension process is realized.
Description
Technical Field
The application relates to the technical field of power transmission, in particular to an extension module of GIS equipment.
Background
GIS equipment (Gas Insulated Switchgear) is used as power transmission and transformation key equipment, and is widely applied to power systems due to the advantages of compact structure, safe and reliable operation, long overhaul period, no influence of external environment and the like. As an example of electrical equipment, the task of a disconnector in GIS equipment is to withstand certain rated voltages and currents for a long time and to provide a reliable insulation break when needed; the task of the earthing switch is to withstand a certain rated voltage for a long time and to provide reliable earthing when needed;
generally, projects such as power stations and converter stations are built in stages, and are often in a mode of 'building a batch and putting into a batch'. Therefore, a main bus interface needs to be reserved for a later project when the GIS equipment is installed in the early stage, and the installed GIS main bus needs to be operated in a normal live mode when the GIS equipment is installed in the later stage, so that the live expansion function of a power station or a converter station can be met.
Disclosure of Invention
In view of this, the present application provides an extension module of a GIS device, which is applied to a power station or a converter station, and is used for implementing a function of no power outage during extension.
In order to achieve the above object, the following solutions are proposed:
an extension module of GIS equipment comprises a support, a left isolation grounding submodule, a middle isolation grounding submodule and a right isolation grounding submodule, wherein the left isolation grounding submodule, the middle isolation grounding submodule and the right isolation grounding submodule are arranged on the support in sequence;
the left isolation grounding sub-module, the middle isolation grounding sub-module and the right isolation grounding sub-module are connected with a main bus through respective interfaces;
in an extension state, the middle contact of the left isolation grounding sub-module is connected with the grounding contact of the left isolation grounding sub-module and is disconnected with the isolation contact of the left isolation grounding sub-module; the middle contact of the middle isolation grounding submodule is communicated with the grounding contact of the middle isolation grounding submodule and is disconnected with the isolation contact of the middle isolation grounding submodule; and the middle contact of the right isolation grounding sub-module is connected with the grounding contact of the right isolation grounding sub-module and is disconnected with the isolation contact of the right isolation grounding sub-module.
Optionally, the left isolated ground sub-module includes a housing, a middle contact base, a middle contact, a ground contact, an isolated contact, an insulating torsion bar, and an air chamber partition.
Optionally, the middle contact seat is located at the right middle of the cavity of the housing;
the intermediate contact is positioned in the center of the cavity of the intermediate contact seat, and the intermediate contact does linear reciprocating motion along the axis of the intermediate contact seat along with the rotation of the insulating torsion bar;
the grounding contact is positioned in the cavity of the shell and relatively below the middle contact seat, and can be communicated with and separated from the grounding contact when the middle contact reciprocates;
the isolation contact is positioned in the cavity of the shell and above the middle contact seat, and can be communicated with and separated from the isolation contact when the middle contact reciprocates;
the air chamber partition plate is positioned right above the shell, the isolation contact is mounted on the air chamber partition plate, and meanwhile, the left isolation grounding sub-module is separated from the air chamber of the left main bus.
Optionally, the interface between the left isolation grounding submodule and the main bus is realized by the air chamber partition plate, and the upper side of the air chamber partition plate is the bus side.
Optionally, the middle isolation ground submodule includes a housing, a middle contact seat, a middle contact, a ground contact, an isolation contact, a driving shaft, a first air chamber partition, a second air chamber partition, and a third air chamber partition.
Optionally, the middle contact seat is located in the middle of the cavity of the housing;
the middle contact is positioned in the center of the cavity of the middle contact seat, and the middle contact can do linear reciprocating motion along the axis of the middle contact seat along with the rotation of the driving shaft;
the isolation contact is positioned in the cavity of the shell and relatively below the middle contact seat, and can be communicated with and separated from the isolation contact when the middle contact reciprocates;
the grounding contact is positioned in the cavity of the shell and above the middle contact seat, and can be communicated with and separated from the grounding contact when the middle contact reciprocates;
the air chamber partition plate is positioned on the left side of the shell;
the middle contact seat of the left isolation grounding submodule and the middle contact seat of the middle isolation grounding submodule are connected with the middle conductor of the first air chamber partition plate;
the second air chamber baffle is positioned on the right side of the shell;
the middle contact seat of the right isolation grounding submodule and the middle contact seat of the middle spacer module are connected with the middle conductor of the second air chamber partition plate;
the third air chamber baffle is positioned below the shell;
the isolating contacts of the middle ion isolating module are arranged on the isolating switch.
Optionally, an interface between the middle isolation grounding submodule and the left isolation grounding submodule is implemented by the first air chamber partition plate, the left isolation grounding submodule is arranged on the left side of the first air chamber partition plate, and the middle isolation grounding submodule is arranged on the right side of the first air chamber partition plate.
Optionally, an interface between the middle isolation grounding sub-module and the right isolation grounding sub-module is implemented by the second air chamber partition plate, the middle isolation grounding sub-module is arranged on the left side of the second air chamber partition plate, and the right isolation grounding sub-module is arranged on the right side of the second air chamber partition plate.
Optionally, the interface below the middle isolation grounding submodule is formed by the third air chamber partition plate, the upper side of the third air chamber partition plate is the middle isolation grounding submodule, and the lower side of the third air chamber partition plate is a reserved interface, and the reserved interface is used for butt joint with other GIS equipment.
According to the technical scheme, the extension module of the GIS equipment comprises a support, and a left isolation grounding submodule, a middle isolation grounding submodule and a right isolation grounding submodule which are arranged on the support in sequence; the left isolation grounding sub-module, the middle isolation grounding sub-module and the right isolation grounding sub-module are connected with a main bus through respective interfaces; when the extension part is subjected to a high-voltage connection test in an extension state, because the middle contacts of the three sub-modules are grounded, one grounding protection can be formed between the live bus and the reserved interval, so that the reserved interval can not influence the normal operation of the live bus when the high voltage is applied, and the uninterrupted power supply function in the whole extension process is realized.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic diagram of an extension module of a GIS device according to an embodiment of the present application;
fig. 2 is a schematic diagram of another extension module of a GIS device according to an embodiment of the present application.
1. Left isolation grounding sub-module
1-1, air chamber partition
1-2, isolating contact
1-3, intermediate contact
1-4 middle contact base
1-5 insulating torsion bar
1-6, outer shell
1-7, ground contact
2. Right isolation grounding sub-module
2-1, air chamber partition
2-2, isolating contact
2-3, intermediate contact
2-4 middle contact base
2-5 insulating torsion bar
2-6, outer casing
2-7, ground contact
3. Middle isolation grounding sub-module
3-1, middle contact base
3-2, ground contact
3-3, intermediate contact
3-4, third air chamber partition plate
3-5, isolating contact
3-6 first air chamber partition
3-7, second air chamber partition
3-8, drive shaft
3-9, outer casing
A. Interface A
B. Interface B
C. Interface C
D. Interface D
E. Interface E
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Gis (gaunsultsculling) is an english abbreviation of gas insulated fully enclosed switchgear. The GIS is composed of a breaker, a disconnecting switch, a grounding switch, a mutual inductor, a lightning arrester, a bus, a connecting piece, an outgoing line terminal and the like, all the equipment or components are enclosed in a metal grounded shell, and SF6 insulating gas with certain pressure is filled in the metal grounded shell, so that the GIS is also called as an SF6 fully-closed combined electrical appliance. GIS devices have been widely operated around the world since the practical use in the 60's of the 20 th century. GIS is widely used not only in the high-voltage and ultra-high voltage fields, but also in the ultra-high voltage field. Compared with a conventional open-type transformer substation, the GIS has the advantages of compact structure, small occupied area, high reliability, flexible configuration, convenience in installation, high safety, high environmental adaptability, small maintenance workload and maintenance interval of main parts not less than 20 years. At present, GIS foreign manufacturers mainly comprise ABB, Toshiba, Mitsubishi, Hitachi, Siemens, Alston and the like, and domestic manufacturers comprise Xikai, Shengao, Pingtao and the like. China has mastered the design and manufacture technology of 500 kV GIS by technical introduction, digestion and absorption. An independently developed 1000 kv GIS (including core component arc extinguishing chambers and operating mechanisms) is designed and manufactured completely and autonomously, and a product is expected to be provided in 6 months in 2009.
The technology of GIS manufacturing has been continuously advanced and developed, and over 40 years, GIS manufacturers have conducted extensive research and development in the aspects of component structure, combination, manufacturing process, use and maintenance, with the focus of improving the two main goals of economy and reliability. With the successful development of the high-capacity single-voltage SF6 circuit breaker and the application of the zinc oxide arrester, the technical performance and parameters of the GIS exceed those of conventional switch equipment, the structure is greatly simplified, the reliability is greatly improved, and very favorable conditions are created for the further miniaturization of the GIS.
The definition of GIS is: metal-enclosed switchgear which uses a gas as an insulating medium in whole or in part, without using air at atmospheric pressure. The high-voltage distribution device is a high-voltage distribution device which is formed by combining 7 high-voltage electric appliances including a short-circuit device, a bus, an isolating switch, a voltage transformer, a current transformer, a lightning arrester and a sleeve, and is called gaussianstedsubstation. The GIS adopts sulfur hexafluoride (SF6) gas with excellent insulating property and arc extinguishing property as an insulating and arc extinguishing medium, and seals all high-voltage electrical components in the grounding metal cylinder, so that compared with the traditional open-type power distribution device, the GIS has the advantages of small floor area, no environmental interference on all sealed components, high operation reliability, convenient operation, long overhaul period, small maintenance workload, quick installation, low operation cost, no electromagnetic interference and the like. After more than 30 years of development and development, the GIS technology is rapidly developed and rapidly applied to power systems worldwide. At present, with the development of the global power system and the increasing requirement on the operational reliability of the system, the GIS technology will be continuously developed and will become the mainstream of the development of the high-voltage electrical appliances in this century.
In order to ensure the smooth installation of the GIS, in the construction design stage, designers need to carefully consider the following two problems, otherwise, the installation of the GIS is difficult.
Firstly, the GIS hoisting mode. At present, electric single-beam bridge cranes are mostly adopted for the indoor GIS installation and hoisting load conditions. The hoisting speed of the crane has two gears, and the low gear is mainly used for adjusting the equipment in place. Two gears are coordinated for application. For example, the Gomber gorge 330kVGIS project, the cotton beach 220kVGIS project and some power stations with higher voltage level all adopt the hoisting mode, and practice proves that the method is effective.
Secondly, the pre-embedding mode of the GIS equipment foundation is adopted. Generally, loading conditions, hole reserving and pre-embedding requirements of the GIS are provided by a manufacturer, but the basic pre-embedding mode is determined by a designer according to basic data provided by the manufacturer. At present, two types of channel steel and bolts are used as basic embedded parts which are commonly used. The construction of pre-buried bolt wherein is simpler, but the adjustability is poor, if the bolt meets floor reinforcing bar, then need adjusting bolt position to trompil again on the equipment support fixed needs to be connected with it, then carry out rust-resistant treatment to the trompil. The embedded channel steel does not have the problems, so that the embedded channel steel is more in application.
Both of the above aspects should be noted in the design. During installation of the GIS, a designer is often required to be represented on site, and at this time, the designer should know three major elements in the GIS installation process: namely cleanliness, sealability and vacuum. The GIS is characterized in that the installation process is the last key stage for controlling the quality of the GIS after operation due to the structural characteristics of the GIS.
A large number of installation practices prove that the cleanliness is the most important task in GIS final assembly and field installation. The site condition of a domestic GIS installation site is generally poor, and in order to prevent dust, water should be sprayed and wiped off in the site when the GIS installation site is cleaned for the first time before installation, and the GIS installation site is started after air is static for 48 hours. The aluminum tube used as the electrode is inevitably subjected to surface burrs and aluminum shavings during the processing, and the particles are the source of discharge in a withstand voltage test, so special attention is paid to ensure the cleanness of the aluminum conductor. This requires, on the one hand, an intensive cleaning check of the conductor processing, which prevents dead zones; on the other hand, manufacturers should add new means for vibration cleaning of conductors before final assembly, try to clean out residues in dead corners inside hollow bodies, or perform similar partial discharge tests on conductors before assembly to check out residual aluminum scraps and metal wires. Some domestic GIS products are not managed tightly, sundries are remained in the GIS when leaving a factory, and in addition, many installation sites are not managed tightly, dust is scattered, the difficulty of ensuring the cleanliness is increased, so strict requirements are required, and the construction is meticulous. The Wanjiazhai GIS is that foreign matters in the GIS cause three times of discharge in the test, and the GIS has to be disassembled again for local cleaning, so that the workload is increased, the construction period is influenced, and the teaching is worthy of being led to guard.
Hermeticity is critical for GIS insulation, and SF6 gas leakage can cause a fatal failure of the GIS. The leak tightness check should therefore be performed throughout the entire manufacturing and installation. The sealing effect mainly depends on the welding quality of the tank body, and the manufacturing, mounting and adjusting conditions of the sealing ring are the second.
In addition to the above two key factors, the requirement of vacuum degree is the third control factor in the final assembly and installation process, and is an important guarantee measure for controlling the water content of SF6, so that the vacuum degree is required to reach 133Pa before filling SF6 gas, and the vacuum degree is required to be continuously pumped for 30min, and the moisture content of SF6 gas and the moisture content of other objects (insulators and sealing bodies) in the tank can be reduced. The key of the influence of moisture on the operation of the GIS is as follows: if the SF6 gas is not controlled to be below 0 ℃, condensation will form on the surface of the insulator during temperature change, and the attached water drops react with SF6 arc products to generate low fluoride such as HF, thereby causing the insulation material and metal surface along the surface to be degraded. If the allowable value of the SF6 dew point is controlled to a low value, not water droplets but ice crystals are condensed on the surface of the insulator at the time of temperature change, which has little influence on the insulation performance. Therefore, there are regulations in both IEC and international: the dew point of the fresh gas charged into the GIS should not exceed-5 ℃ at the rated density.
The GIS test comprises a type test, a delivery test and a field test. The type test is to test the correctness of the product and verify various performances of the GIS device; the factory test is carried out at each interval to check whether defects exist in the processing process; the field test is an effective monitoring method for checking whether the GIS power distribution device has abnormal phenomena in the processes of packaging, transportation, storage and installation, the GIS is required to be carried out before the GIS is put into operation, and the former two tests cannot be replaced.
A large number of field test results show that: (1) parts are loosened, fall off and the conductive surface is scratched in field insulation test; (2) the strong vibration causes cracking of the insulator; (3) mounting misalignment causes electrode surface defects; (4) conductive particles are caused to enter in the mounting process; (5) forgetting the tool inside the device due to negligence; (6) the conductive particles originally trapped within the device are not detected during factory testing, and subsequently are shaken out or floated within the device during shipping and installation, etc. These factors can lead to insulation failure. These insulation defects generally fall into two broad categories: one is insulation failure induced by free particles and dust, called mobile insulation defect (class a); and the other is the fixed insulation defect (B type) caused by accidents in installation and transportation.
According to statistics, 2/3 insulation accidents of SF6 equipment occur on equipment which is not subjected to field voltage withstand test. The operating experience of the hydropower station in the canada, ontario shows that the GIS accidents not only occur on equipment which is not subjected to field insulation test, but also occur within the first 4 months of putting into operation after installation, and the accidents account for about 67 percent of the total accidents. The accident rate of the first year is 0.53 times per year The interval was followed by 0.06 times/year intervals. The investigation report in the north america suggests that the accident rate is 4 times/year after the operation of the GIS in the first year and 0.1 times/year after one year. Therefore, it is necessary to perform insulation tests before commissioning after GIS are factory assembled, transported and field installed.
There are two grounding modes for the housing of the GIS, one is a one-point grounding mode, and the other is a multi-point grounding mode. The one-point grounding mode is a mode that one end of each segment of the GIS shell is insulated, and the other end of each segment is grounded by one point. Structurally, the housings in series are typically insulated at the flange and to ground at the housing support. The advantages of this grounding mode are: because no shell current passes through for a long time, even if the rated current value is large, the temperature rise of the shell is low, and the loss is small; because no current flows into the foundation part, no temperature rise occurs in the civil engineering reinforcing steel bar. The induction voltage of the shell at the non-grounding end is higher during accidents, the external magnetic field is stronger, when the current flowing in the conductor is larger, the steel bar of the shell is often heated, and the reliability is poorer because only one grounding wire is arranged. At present, the domestic GIS design generally does not adopt the shell grounding mode.
The multipoint grounding method is to connect the housing and the ground by a conductor in a certain section of the GIS, and to adopt multipoint grounding of more than two points. Generally, in the structure, no insulation is arranged between flanges connected in series, a support of equipment is not insulated and is conducted by a fixing bolt, and a grounding wire is also arranged in a shell. The advantages of multipoint grounding are many: the external magnetic leakage is less, and the induction voltage is low; because the GIS shell has more than two points of grounding points, the reliability and the safety of the GIS shell can be greatly improved; insulating layers such as insulating flanges and the like are not needed, so that the construction is convenient; the currents of the housing and the conductor almost cancel each other out, so that the external magnetic field is small, and the heat generated by the steel structure and the induced current flowing through the sheath of the control cable are small. Since the induced current flows in the case, the temperature rise and the loss in the case are larger than those in the one-point grounding manner. But the shell loss in the GIS project of the power station is not large, so the supply can be ignored in the project. For example: the power loss of the GIS shell of the Guangzhou pumped storage power station is 2.43-3.79W/(m & ph), and can be ignored.
According to the design experience of GIS engineering in recent years, some blank points in design standardization are considered to be needed to be solved by the practioners. Because the design criteria is the basis of the entire design process, the device interface criteria is the manufacturer's manufacturing basis.
The expansion joint is arranged, and particularly, the technical requirements on the expansion joint when an inlet GIS device is selected are met. The expansion joint is mainly used for absorbing expansion caused by heat and contraction caused by cold of a GIS bus, displacement of a basic expansion joint, installation and adjustment among equipment and displacement caused by earthquake and operation, and is mainly arranged at the positions of connection of the bus, each equipment, a transformer incoming line, a line outgoing line and the like. In the factory building of the hydropower station, the expansion joints between the factory and the dam are numerous, and the expansion amount of each expansion joint cannot be accurately measured, so that higher requirements are provided for the expansion joints in the bidding design of the GIS.
If import GIS equipment is adopted, foreign manufacturers have different views on the expansion joint, some manufacturers consider that the horizontal displacement and the vertical displacement which can completely meet the design requirements can be met, and some manufacturers consider that the relation between the civil expansion joint and the expansion joint is not large.
The national standard of China stipulates that ' a manufacturer should select the structure of the telescopic joint according to the purpose of use, the allowed displacement and the like ' and the corresponding displacement (uneven sinking) allowed between the GIS separated bases should be agreed by the manufacturer and the user '. In order to ensure that there is a basis in technical negotiation with outsiders and the safety and reliability of the operation of the GIS equipment are ensured, quantitative calculation and requirements on expansion joints should be added in the national standard.
Secondly, the material and size of the GIS ground wire. This is often a more discussed problem in negotiations with GIS foreigners. Foreign manufacturers advocate that a copper grounding grid and a copper grounding lead are adopted in a GIS room, because the conductivity and corrosion resistance of copper are superior to those of steel, but because the cost of copper and the welding cost are high, steel grounding grids and steel grounding wires are mostly adopted in power stations in China. At present, the domestic ultrahigh voltage GIS adopts a copper grounding lead. The connection between the copper lead and the steel grounding grid needs to adopt a special mode to prevent the chemical corrosion phenomenon caused by the direct contact of the steel and the copper.
In addition, foreign manufacturers calculate the section of the grounding wire according to the thermal stability current of the GIS, and have specific calculation formulas and curves, the calculated parameters comprise the short-circuit current of the grounding, the fault duration and the corresponding allowable temperature rise value of the grounding wire, wherein the corresponding allowable temperature rise value of the fusing of the grounding wire plays a role in determining, the allowable temperature rise value adopted by some manufacturers is 100 ℃, the section of the selected grounding wire is smaller, and the allowable temperature rise value adopted by some manufacturers is 200 ℃, and the section of the selected grounding wire is larger. The specifications of China require that short-circuit current flowing through a grounding wire, the thermal stability coefficient of a conductor and the fault duration time are adopted to calculate the section of the grounding conductor, so that the condition that the grounding section does not meet the requirements of manufacturers often occurs. Relevant regulations on the specification and the size of the grounding wire in the national specification are required.
The problems are inevitable and need to be improved in the GIS design process, the design quality and the product quality can be ensured only by making corresponding standards as soon as possible, and the imperfect links in the design and hidden troubles in the operation are reduced as far as possible. Before the standard is established, a great number of designers are expected to know the problems, the problems are fully considered in the design process, and the design quality is ensured as much as possible by using the solutions of other power stations for reference.
Example one
Fig. 1 is a schematic diagram of an extension module of a GIS device according to an embodiment of the present application.
As shown in fig. 1, the extension module of the GIS device provided in this embodiment includes three sub-modules, which are a left isolation grounding sub-module, a right isolation grounding sub-module, and a middle isolation grounding sub-module, which are sequentially arranged. The sub-modules are connected with each other through interfaces.
And each isolation grounding sub-module includes intermediate contacts, ground contacts, and isolation contacts.
When the isolation grounding submodule is in an extension state, the middle contacts of the left, right and middle isolation grounding submodules are connected with the grounding contacts, the middle contacts of the three submodules are disconnected with the isolation contacts, the middle contacts are in a grounding state, the isolation contacts of the left and right isolation grounding submodules can be in a charged state, and two isolation fractures exist between the isolation contacts of the left and right isolation grounding submodules and the isolation contacts of the middle isolation submodules, so that high insulation isolation characteristics can be obtained.
According to the technical scheme, the extension module of the GIS equipment comprises a support, and further comprises a left isolation grounding submodule, a middle isolation grounding submodule and a right isolation grounding submodule which are arranged on the support in sequence; the left isolation grounding sub-module, the middle isolation grounding sub-module and the right isolation grounding sub-module are connected with a main bus through respective interfaces; when the extension part is subjected to a high-voltage connection test in an extension state, because the middle contacts of the three sub-modules are grounded, one grounding protection can be formed between the live bus and the reserved interval, so that the reserved interval can not influence the normal operation of the live bus when the high voltage is applied, and the uninterrupted power supply function in the whole extension process is realized.
As shown in fig. 2, the middle contacts of the left isolation grounding sub-module, the right isolation grounding sub-module and the middle isolation grounding sub-module are connected with the isolation contacts, the middle contacts of the left isolation grounding sub-module and the right isolation grounding sub-module are disconnected with the grounding contacts, and at this time, the middle contacts are in a communicated state, and the reserved interval is normally put into use.
In particular, the isolation operation and the grounding operation of each isolation grounding submodule are mechanically interlocked, so that the safety performance of the isolation grounding submodule is high in both extension and use.
Specifically, the left isolated grounding submodule comprises seven components such as a shell, a middle contact seat, a middle contact, a grounding contact, an isolated contact, an insulating torsion bar and an air chamber partition plate, and the seven components of the left isolated grounding submodule have a certain arrangement form.
The arrangement of the left isolation grounding submodule can be described as follows: the middle contact seat is positioned in the middle of the cavity of the shell; the middle contact is positioned in the center of the cavity of the middle contact seat and linearly reciprocates along the axis of the middle contact seat along with the rotation of the insulating torsion bar; the grounding contact is positioned in the cavity and relatively below the middle contact seat, and can be communicated with and separated from the grounding contact when the middle contact reciprocates; the isolation contact is positioned in the cavity of the shell and above the middle contact seat, and can be communicated with and separated from the isolation contact when the middle contact reciprocates; the air chamber partition plate is positioned right above the shell, the isolation contact is mounted on the air chamber partition plate, and meanwhile, the left isolation grounding sub-module is separated from the air chamber of the left main bus.
The interface of the left isolation grounding submodule and the main bus is realized by an air chamber partition plate, the upper side of the air chamber partition plate is a bus side, and the lower side of the air chamber partition plate is the left isolation grounding submodule.
The right isolation grounding sub-module and the left isolation grounding sub-module are symmetrically arranged;
the middle isolation grounding submodule comprises nine parts, namely a shell, a middle contact seat, a middle contact, a grounding contact, an isolation contact, a driving shaft, a first air chamber partition plate, a second air chamber partition plate, a third air chamber partition plate and the like.
The arrangement form of the middle isolation grounding submodule is as follows: the middle contact seat is positioned in the middle of the cavity of the shell; the middle contact is positioned in the center of the cavity of the middle contact seat, and can do linear reciprocating motion along the axis of the middle contact seat along with the rotation of the driving shaft; the isolation contact is positioned in the shell cavity and relatively below the middle contact seat, and can be communicated with and separated from the isolation contact when the middle contact reciprocates; the grounding contact is positioned in the shell cavity and above the middle contact seat, and can be communicated with and separated from the grounding contact when the middle contact reciprocates; the first air chamber partition plate is positioned on the left side of the shell, the middle contact seat of the left isolation grounding sub-module and the middle contact seat of the middle isolation grounding sub-module are connected with the middle conductor of the first air chamber partition plate, so that the left isolation grounding sub-module is electrically communicated with the middle ion module, and the air chambers of the left isolation grounding sub-module and the middle ion module are separated; the second air chamber partition plate is positioned on the right side of the shell, and the middle contact seat of the right isolation grounding sub-module and the middle contact seat of the middle ion isolating module are connected with the middle conductor of the second air chamber partition plate, so that the right isolation grounding module is electrically communicated with the middle ion isolating module, and the air chambers of the right isolation grounding sub-module and the middle ion isolating module are separated; the third air chamber partition plate is positioned below the shell, and an isolation contact of the middle ion module is arranged on the third air chamber partition plate, so that air chamber separation between the middle ion module and a reserved interface below the middle ion module is realized;
the interface between the middle isolation grounding submodule and the left isolation grounding submodule is realized by a first air chamber partition plate of the middle isolation grounding submodule, the left side of the first air chamber partition plate is the left isolation grounding submodule, and the right side of the first air chamber partition plate is the middle isolation grounding submodule.
The interface between the middle isolation grounding submodule and the right isolation grounding submodule is realized by a second air chamber partition plate of the middle isolation grounding submodule, the middle isolation grounding submodule is arranged on the left side of the second air chamber partition plate, and the right isolation grounding submodule is arranged on the right side of the second air chamber partition plate.
The interface below the middle isolation grounding submodule is realized by a third air chamber partition plate, the middle isolation grounding submodule is arranged on the upper side of the third air chamber partition plate, and the reserved interface is arranged on the lower side of the third air chamber partition plate and is used for butt joint when other GIS equipment is expanded.
Specifically, the orientation "left, right, middle, up and down" is the relative position relationship between the sub-modules, and as a whole, the actual position change of the sub-modules caused by the rotation angle does not affect the functions thereof.
Particularly, the grounding contacts of the left isolation grounding sub-module, the middle isolation grounding sub-module and the right isolation grounding sub-module only need to be ensured to be more than one, so that the purpose of the invention can be realized, but the reserved quantity and positions are randomly selected and matched.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
While preferred embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the invention.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.
The technical solutions provided by the present invention are described in detail above, and the principle and the implementation of the present invention are explained in this document by applying specific examples, and the descriptions of the above examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (9)
1. The extension module of the GIS equipment is characterized by comprising a reserved interface, a left isolation grounding submodule, a middle isolation grounding submodule and a right isolation grounding submodule which are arranged on the reserved interface in sequence;
the left isolation grounding sub-module, the middle isolation grounding sub-module and the right isolation grounding sub-module are connected with a main bus through respective interfaces;
in an extension state, the middle contact of the left isolation grounding sub-module is connected with the grounding contact of the left isolation grounding sub-module and is disconnected with the isolation contact of the left isolation grounding sub-module; the middle contact of the middle isolation grounding submodule is communicated with the grounding contact of the middle isolation grounding submodule and is disconnected with the isolation contact of the middle isolation grounding submodule; and the middle contact of the right isolation grounding sub-module is connected with the grounding contact of the right isolation grounding sub-module and is disconnected with the isolation contact of the right isolation grounding sub-module.
2. Extension module according to claim 1, wherein the left isolating grounding submodule comprises a housing, a middle contact base, a middle contact, a grounding contact, an isolating contact, an insulating torsion bar and an air chamber partition.
3. The extension module according to claim 2, wherein the middle contact seat of the left isolated ground submodule is located right in the middle of the cavity of the housing of the left isolated ground submodule;
the middle contact of the left isolation grounding sub-module is positioned in the center of the cavity of the middle contact seat of the left isolation grounding sub-module, and the middle contact of the left isolation grounding sub-module linearly reciprocates along the axis of the middle contact seat of the left isolation grounding sub-module along with the rotation of the insulation torsion bar of the left isolation grounding sub-module;
the grounding contact of the left isolation grounding sub-module is positioned in the cavity of the shell of the left isolation grounding sub-module and below the middle contact seat of the left isolation grounding sub-module, and when the middle contact of the left isolation grounding sub-module reciprocates, the grounding contact of the left isolation grounding sub-module can be communicated with and separated from the grounding contact of the left isolation grounding sub-module;
the isolation contact of the left isolation grounding sub-module is positioned in the cavity of the shell of the left isolation grounding sub-module and above the middle contact seat of the left isolation grounding sub-module, and when the middle contact of the left isolation grounding sub-module reciprocates, the isolation contact of the left isolation grounding sub-module can be communicated with and separated from the isolation contact of the left isolation grounding sub-module;
the air chamber partition plate of the left isolation grounding sub-module is positioned right above the shell of the left isolation grounding sub-module, the isolation contact of the left isolation grounding sub-module is installed on the air chamber partition plate, and meanwhile, the left isolation grounding sub-module is separated from the air chamber of the left main bus, and the right isolation grounding sub-module is separated from the air chamber of the right main bus.
4. Extension module according to claim 3, wherein the interface of the left isolated grounding submodule with the main busbar is realized by the gas chamber partition, the upper side of which is the busbar side.
5. The extension module of claim 1, wherein the middle isolation grounding submodule comprises a housing, a middle contact socket, a middle contact, a grounding contact, an isolation contact, a drive shaft, a first plenum partition, a second plenum partition, and a third plenum partition.
6. Extension module according to claim 5, wherein the intermediate contact seat of the intermediate isolation grounding submodule is located in the middle of the cavity of the housing of the intermediate isolation grounding submodule;
the middle contact of the middle isolation grounding sub-module is positioned in the center of the cavity of the middle contact seat of the middle isolation grounding sub-module, and the middle contact of the middle isolation grounding sub-module can do linear reciprocating motion along the axis of the middle contact seat of the middle isolation grounding sub-module along with the rotation of the driving shaft of the middle isolation grounding sub-module;
the isolation contact of the middle isolation grounding sub-module is positioned in the cavity of the shell of the middle isolation grounding sub-module and is relatively below the middle contact seat of the middle isolation grounding sub-module, and when the middle contact of the middle isolation grounding sub-module reciprocates, the isolation contact of the middle isolation grounding sub-module can be communicated with and separated from the isolation contact of the middle isolation grounding sub-module;
the grounding contact of the middle isolation grounding sub-module is positioned in the cavity of the shell of the middle isolation grounding sub-module and above the middle contact seat of the middle isolation grounding sub-module, and can be communicated with and separated from the grounding contact of the middle isolation grounding sub-module when the middle contact of the middle isolation grounding sub-module reciprocates;
the air chamber partition plate of the middle isolation grounding sub-module is positioned on the left side of the shell of the middle isolation grounding sub-module;
the middle contact seat of the left isolation grounding submodule and the middle contact seat of the middle isolation grounding submodule are connected with the middle conductor of the first air chamber partition plate;
the second air chamber baffle is positioned on the right side of the shell;
the middle contact seat of the right isolation grounding submodule and the middle contact seat of the middle isolation grounding submodule are connected with the middle conductor of the second air chamber partition plate;
the third air chamber baffle is positioned below the shell;
and the isolation contact of the middle isolation ion grounding module is arranged on the third air chamber partition plate.
7. The extension module according to claim 5, wherein the interface between the middle and left isolated ground submodule is implemented by the first plenum partition, the left side of the first plenum partition being the left isolated ground submodule and the right side being the middle isolated ground submodule.
8. The extension module of claim 5, wherein the interface between the middle and right isolated ground submodule is implemented by the second gas chamber partition, which on the left side is the middle isolated ground submodule and on the right side is the right isolated ground submodule.
9. The extension module of claim 5, wherein the interface below the middle isolation grounding submodule is formed by the third gas chamber partition plate, the upper side of the third gas chamber partition plate is the middle isolation grounding submodule, and the lower side of the third gas chamber partition plate is a reserved interface, and the reserved interface is used for being in butt joint with other GIS equipment.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3221374B2 (en) * | 1997-11-04 | 2001-10-22 | 日新電機株式会社 | Gas insulated switchgear |
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| CN101582568B (en) * | 2009-06-24 | 2011-11-23 | 河南平高电气股份有限公司 | Butting unit for GIS equipment and method thereof |
| CN106058709B (en) * | 2016-06-29 | 2018-02-02 | 河南平芝高压开关有限公司 | A kind of GIS prepared separations and a kind of GIS device |
| CN206331958U (en) * | 2016-11-17 | 2017-07-14 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Double-fracture disconnecting switch module |
| CN107370063B (en) * | 2017-08-02 | 2019-11-12 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Cable extends the functional module that do not have a power failure in GIS |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3221374B2 (en) * | 1997-11-04 | 2001-10-22 | 日新電機株式会社 | Gas insulated switchgear |
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