CN218549105U - Switch station with protection device in prefabricated cabin - Google Patents

Abstract

The utility model relates to a column switch device technical field, specificly relate to a be provided with protection device's switch station in prefabricated under-deck, including prefabricated under-deck, external power equipment, prefabricated under-deck is provided with secondary screen cabinet, secondary screen cabinet is including protection screen, primary equipment collection accuse cabinet, power screen, the top in prefabricated under-deck is provided with switchgear, the outside in prefabricated under-deck is provided with prefabricated under-deck mounting bracket, prefabricated under-deck mounting bracket includes the mounting panel at prefabricated under-deck top, the loading board of prefabricated under-deck portion to and the support frame that sets up between backup pad and loading board. Through the utility model discloses a switch station structure has realized providing except that transforming + communication channel to the side station for the circuit access reforms transform another kind of selection, solves the difficult problem that newly-built transformer substation can't insert high-tension line and have a plurality of stations.

Description

Switch station with protection device in prefabricated cabin

Technical Field

The utility model relates to a column switch equipment technical field, specificly relate to a be provided with protection device's switch station in prefabricated under-deck.

Background

At present, with the rapid increase of urban power load, a transformer substation is newly built in the center of a city, and a power supply is led from the periphery of the city through a high-voltage cable, which is an urgent problem for power supply of many economically developed cities in China. In order to improve the safety of the electric power in the using and transmitting process, an on-pole switch is usually adopted to ensure the electric safety on a telegraph pole.

The pole-mounted switch is a multifunctional intelligent product, mainly comprises three major parts, namely a vacuum circuit breaker body, an intelligent controller and an external voltage transformer, is widely used in overhead looped network lines of 10kV urban and rural power distribution networks, and serves as a sectional isolating switch and an interconnection switch and an automatic switch device capable of realizing load allocation of the looped network lines; in areas or lines with low load density, a 10kV pole switch is needed to ensure normal operation of the circuit, and the protection range of a superior protection device is shortened from an original line from the superior switch to a user side to the position from the superior switch to the pole switch by the aid of a protection function of the pole switch, the pole switch to the user side is protected by the pole switch, superior protection burden is reduced, in addition, the 10kV pole switch plays a role of a boundary switch, one user has a fault and acts by the pole switch to cut off a fault line, normal power supply of other users is not affected, and power supply reliability is improved.

At present, the 10kV and 35kV voltage grades on the market have mature schemes and products, but the 110kV voltage grade does not have the products; in some remote areas, a plurality of terminal substations of a 110kV line are not provided with corresponding line protection, line faults are realized by means of protection of a superior substation, and one line also has a plurality of substations, and the fault of one substation can cause all substations on the whole line to be incapable of supplying power; the incoming line protection of a contralateral substation is required to be improved when a 110kV transformer substation is newly built in a city and a 110kV line is connected in a T mode, three-end optical fiber differential protection is added, optical differential protection puts requirements on an optical fiber communication channel, and the construction cost is increased; when a 110kV line has three substations, the situation that a fourth substation is accessed cannot be realized, because four-terminal optical fiber differential protection is not applied so far, the situation that protection transformation and communication channels are difficult to realize in remote areas is caused, and a certain number of power transmission lines use a carrier communication mode, the application of the carrier communication power transmission lines needs to be considered in the 110kV switching station, and a solution is provided.

The utility model CN103579930A discloses a prefabricated cabin type transformer substation, which comprises a double-layer prefabricated cabin type transformer substation combination module and two prefabricated cabin type transformer modules, wherein the two prefabricated cabin type transformer modules are positioned at one side of the double-layer prefabricated cabin type transformer substation combination module, and a fire fighting channel is formed between the double-layer prefabricated cabin type transformer substation combination module and the prefabricated cabin type transformer modules; the double-layer prefabricated cabin type transformer substation combined module comprises a prefabricated cabin type switch box body, a prefabricated cabin type reactive compensation box body, a prefabricated cabin type combined electrical appliance box body and a prefabricated cabin type secondary control box body; the prefabricated cabin type transformer module comprises a prefabricated cabin type transformer box body and a transformer, and the prefabricated cabin type switch box body, the prefabricated cabin type reactive compensation box body, the prefabricated cabin type combined electrical appliance box body and the prefabricated cabin type secondary control box body are assembled together. The prefabricated cabin type transformer substation is built by adopting the prefabricated cabin type box bodies connected in an assembled mode, the construction period of the prefabricated cabin type transformer substation is shortened, the influence on the surrounding environment is reduced, and the occupied area is reduced.

The prefabricated cabin is arranged in the above patent, so that the transportation convenience of the switch station is improved, but the installation combination of the 110KV switch station with more complex structure and more various original components is not introduced.

Based on the prior art and the reasons, 110kV lines need 110kV switch equipment like 10kV and 35kV pole-mounted switches urgently; the following problems need to be solved in order to realize a 110kV voltage class "column switch" product:

1. the 110kV switching station is mostly applied to remote areas with low load density, generally high altitude and high cold areas, and the factor is fully considered in equipment selection.

2. The 110kV switching station has the advantages that the number of 110kV equipment is large, the size is large, the direct hoop can not be directly installed on a line tower like a 10kV pole-mounted switch, the equipment installation needs to be fully considered in the 110kV switching station, and the transportation and the disassembly are convenient.

3. The station system needs to consider the condition that no external 0.4kV power supply is introduced, a 110kV switching station is provided with a power supply PT to provide a power supply for protecting a control power supply and power consumption of the station, the capacity of the power supply PT needs to be checked, and the power supply PT is prevented from being burnt out in an overload manner; when a direct current power supply system is used, remote area factors need to be considered in the calculation of the capacity of the storage battery, and the discharge time of the storage battery needs to be calculated according to 4 hours, 8 hours or even 12 hours.

Disclosure of Invention

To the problem that exists among the prior art, the utility model aims to: the utility model provides an environmental suitability is strong, and installation transportation is convenient, takes place the overload when preventing that power PT from for protection control power and station power consumption provide the power and lead to power PT to burn out's the switch station that is provided with protection device.

In order to achieve the purpose, the utility model adopts the technical proposal that: the utility model provides a be provided with protection device's cubical switchboard in prefabricated under-deck, includes prefabricated under-deck, external power equipment circuit, prefabricated under-deck is provided with the secondary screen cabinet, the secondary screen cabinet includes protection screen, primary equipment collection accuse cabinet, power screen, the top in prefabricated under-deck is provided with switchgear, the outside in prefabricated under-deck is provided with prefabricated under-deck mounting bracket, prefabricated under-deck mounting bracket includes the mounting panel at prefabricated under-deck top, the loading board of prefabricated under-deck portion to and the support frame that sets up between backup pad and loading board.

The switch station is characterized in that a protection device is arranged in the prefabricated cabin, the switch equipment comprises a lightning arrester, an isolation grounding switch, a voltage transformer, a power supply PT and a circuit breaker, and a heat insulation sleeve is arranged on the outer side of the circuit breaker.

The power supply PT comprises a direct-current screen and a storage battery screen, and the power supply PT comprises a direct-current screen alternating-current incoming line power supply for providing electric energy for the direct-current power supply screen.

The switch station is characterized in that the protection device is arranged in the prefabricated cabin, the external power equipment comprises carrier communication power equipment, the carrier communication power equipment comprises a carrier communication power equipment circuit, and a circuit wave trapper used for preventing high-frequency current from shunting to a bus and increasing attenuation is arranged between the carrier communication power equipment circuit and the circuit breaker.

Foretell switch station that is provided with protection device in prefabricated cabin, switchgear still includes HGIS combined electrical apparatus, HGIS combined electrical apparatus circuit breaker, current transformer, link through the wire between arrester, isolation earthing switch, voltage transformer, power PT, the HGIS combined electrical apparatus to the setting is in the top of mounting panel, the both sides of loading board are provided with rings.

Foretell switch station that is provided with protection device in prefabricated cabin, the loading board becomes ship type structure, the both ends perk that makes progress of loading board, the length of loading board is less than the length of mounting panel.

Foretell switch station that is provided with protection device in prefabricated cabin, the support frame is including setting up the carriage in prefabricated cabin outside to and the bracing piece of connection between loading board and mounting panel, the bracing piece is provided with the detachable connector with loading board and mounting panel.

The utility model relates to a be provided with protection device's switch station's beneficial effect in prefabricated under-deck is: through the utility model discloses a switch station structure has realized providing except that another kind of selection is reformed transform to the side station + communication channel for circuit access, solves the difficult problem that newly-built transformer substation can't insert high-tension line and has a plurality of stations, through setting up the loading board into the ship type structure of both ends perk, can make it drag and slide on the soft or level and smooth ground of soil texture, through setting up the rings in the mounting panel both sides, can hoist the whole switch station and carry out the long-distance transportation; through set up the insulation cover in the circuit breaker outside, improve the cold tolerance of circuit breaker, make it satisfy high-altitude, the requirement of high and cold, through set up the circuit wave trapper between the circuit breaker of carrier communication power equipment circuit and transformer substation, prevent that high frequency current from to the generating line reposition of redundant personnel and increase the decay, when the switching station T connects carrier communication power line, increase the circuit wave trapper between switching station and carrier communication power equipment circuit between the two, do not influence original power line carrier communication after realizing switching station T connects, through set up prefabricated cabin mounting bracket outside prefabricated cabin, make things convenient for prefabricated cabin installation and hoist and mount, through using the mounting panel, the power equipment installation scope at prefabricated cabin top of increase that can change the phase, through using mounting panel and loading board of support frame connection, can provide the installation space in prefabricated cabin, further protect prefabricated cabin, through using the connector, be convenient for dismouting between bracing piece and the installation version and the loading board, through using power PT to provide the electric energy to the DC power supply screen, can ensure the electric energy supply of DC supply screen, improve the live time of DC supply screen.

Drawings

FIG. 1 is an overall layout diagram of the switching station of the present invention;

FIG. 2 is a schematic view of the structure of the prefabricated cabin and the bearing plate of the present invention;

FIG. 3 is a layout diagram of the secondary protection screen inside the prefabricated cabin of the utility model;

FIG. 4 is a schematic structural view of the prefabricated cabin installation rack of the present invention;

FIG. 5 is a primary main wiring diagram of the switching station of the present invention;

FIG. 6 is a configuration diagram of the secondary protection of the switching station of the present invention;

fig. 7 is a diagram of the switching station ac/dc power supply system of the present invention;

fig. 8 is a schematic diagram of the line carrier communication according to the present invention.

The system comprises a connecting wire 1, an incoming line arrester 2, an incoming line isolation grounding switch 3, a voltage transformer 4, a power supply PT 5, an HGIS combined electrical apparatus 6, an outgoing line isolation grounding switch 7, an outgoing line arrester 8, a protection level current transformer 9, a circuit breaker 10, a metering level current transformer 11, a protection alarm screen 12, a primary equipment control cubicle 13, a direct current screen 14, a storage battery screen 15, a manual operation mechanism 16, a line protection 17, an electric meter 18, a lifting ring 19, a transformer substation circuit breaker 20, a wave trapper 21, a coupling capacitor 23, a combination filter 24, a high-frequency cable 25, a special transceiver (carrier) 26, a heat insulation board 27, an electric heater 28, 110kV switch equipment 101, a prefabricated cabin 102, a secondary cabinet 103 and a prefabricated cabin mounting rack 104.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the following description is provided with reference to the specific embodiments and the accompanying drawings.

As shown in fig. 1 to 8, a switching station with a protection device in a prefabricated cabin comprises a prefabricated cabin and an external power device, wherein the external power device comprises a carrier communication power device, the carrier communication power device comprises a carrier communication power device line, a secondary screen cabinet is arranged in the prefabricated cabin, the secondary screen cabinet comprises a protection screen, a primary device control cubicle and a power screen, the power screen comprises a direct current power supply screen and a storage battery screen, the top of the prefabricated cabin is provided with a switching device, the switching device comprises a lightning arrester, an isolation grounding switch, a voltage transformer, a power PT and a HGIS combined electrical appliance, a HGIS combined electrical appliance breaker and a current transformer, a heat insulation sleeve is arranged on the outer side of the breaker, the power PT comprises a direct current screen alternating current power supply for providing electric energy for the direct current power supply screen, and a line wave damper for preventing high-frequency current from shunting to a bus to increase attenuation loss is arranged between the carrier communication power device line and the breaker.

Prefabricated cabin mounting bracket includes the mounting panel at prefabricated cabin top, the loading board of prefabricated cabin bottom to and the support frame that sets up between backup pad and loading board, the support frame is including setting up at the outside carriage in prefabricated cabin, and connect the bracing piece between loading board and mounting panel, the bracing piece is provided with the detachable connector with loading board and mounting panel, and the bolt-nut structure is used to the connector, perhaps spherical half surrounding structure, and specific just has current combination mounting means, does not give unnecessary details here.

The loading board becomes ship type structure, and the both ends perk that makes progress of loading board, the length of loading board are less than the length of mounting panel, links through the wire between arrester, isolation earthing switch, voltage transformer, power PT, the HGIS combined electrical apparatus to the setting is in the top of mounting panel, and the both sides of mounting panel are provided with rings.

Specifically, the switchyard in the present technical solution is mainly explained with respect to a 110KV switchyard.

As shown in fig. 1, the 110kV switchgear station is composed of a 110kV switchgear 101, a prefabricated cabin 102, a secondary screen cabinet 103 in the prefabricated cabin, and a prefabricated cabin mounting rack 104, wherein the 110kV switchgear 101 is fixed on a platform composed of a prefabricated cabin roof and the prefabricated cabin mounting rack, and the prefabricated cabin mounting rack and the prefabricated cabin are tightly connected to form a whole; 110kV switchgear 101 contains 2 sets of arresters, 2 sets of isolation earthing switches, 1 set of voltage transformer, 1 set of power PT,1 set of HGIS combined electrical apparatus (containing circuit breaker, current transformer) and connecting wire, 1 set of air-insulated conventional distribution device AIS is selected to power PT, be applicable to remote area more, SF6 gas-insulated HGIS equipment is selected because of the installation reason to the circuit breaker, increase the heat preservation cover in the HGIS outside and design, make its HGIS equipment satisfy high-altitude, the requirement of alpine. The 110kV switch equipment is composed of an incoming line arrester 2, an incoming line isolation grounding switch 3, a voltage transformer 4, a power supply PT 5, an HGIS combined electrical appliance 6, an outgoing line isolation grounding switch 7, an outgoing line arrester 8 and a connecting wire 1, wherein the connecting wire is connected according to the connection shown in figure 1 to form a main wiring form shown in figure 5.

The prefabricated cabin for placing the secondary screen cabinet is smaller in arrangement size relative to 110kV switch equipment, and only the power supply PT and HGIS combined electrical apparatus can be placed at the top of the prefabricated cabin. The 110kV switching station is provided with three power supplies PT, star connection is adopted, 110kV/√ 3/0.22kV is adopted, the capacity of the power supply PT is 2000VA, the protection control power supply uses DC220V, a direct current screen 1 set is arranged, the capacity of a storage battery is selected to be 100AH, and a direct current screen alternating current incoming power supply 1 circuit is from the power supply PT, and 1 circuit is led out.

As shown in fig. 2, the bearing plate of the prefabricated cabin mounting rack is lengthened for bearing the prefabricated cabin mounting rack, the bearing plate is made into a ship-shaped structure, the bearing plate can be dragged and slide on soft soil or smooth ground, the two sides of the bearing plate are provided with the hanging rings, the hanging rings are respectively arranged on four corners of the bearing plate, holes can be directly formed in the bearing plate in a welding mode, the hanging rings are convenient to hoist, the hanging rings can be arranged around the mounting plate, and the hanging switch station is hoisted through the hanging rings 19 to integrally carry out long-distance transportation.

As shown in fig. 3, the secondary screen cabinet 103 is composed of a protection alarm screen 12, a primary equipment control cubicle 13, a direct current screen 14 and a storage battery screen 15; a line protection device, a measurement and control alarm device, a watt-hour meter, a communication device and the like are arranged in the protection alarm screen 12, a primary equipment control cubicle 13 is formed by integrating secondary line control of 110kV switchgear 101 and is an intermediate junction between the primary equipment and the protection alarm screen, and a direct current screen and a storage battery screen are formed by introducing a power supply PT alternating current power supply to be converted into direct current 220V, so that a safe and reliable power supply is provided for control and protection; the prefabricated cabin is in order to adapt to the severe cold district and has done the three-layer design, and is first: the battery panel 15 is a device with a large heat generation amount, and secondly: a layer of heat insulation board 27 is arranged around the prefabricated cabin, and thirdly: two electric heaters 28 are provided.

As shown in fig. 1 and 4, the prefabricated cabin mounting frame 104 supports the installation of the incoming line arrester 2, the incoming line isolating and grounding switch 3, the voltage transformer 4, the outgoing line isolating and grounding switch 7 and the outgoing line arrester 8.

As shown in fig. 5, the incoming line arrester 2 and the outgoing line arrester 8 have two sets, so as to ensure the safety of incoming and outgoing lines; the incoming line isolation grounding switch 3 and the outgoing line isolation grounding switch 7 select a three-phase linkage manual operating mechanism 16 due to the problem that the power of a control power supply is limited, the manual operating mechanism is an auxiliary of an isolation disconnecting link, and the isolation disconnecting link basically comprises an insulating part, a conductive part, a supporting base or a frame, a transmission mechanism and an operating mechanism. The manual operating mechanism for three-phase linkage can adopt a three-phase linkage mode in the prior art, which is not described herein, and is installed on one of the pillars of the auxiliary supporting frame 104 and is 1.5m away from the ground, so that the manual operating mechanism is convenient for personnel to operate; the HGIS combined electrical apparatus 6 is composed of a circuit breaker 10, a protection level current transformer 9 and a metering level current transformer 11, SF6 is gas-insulated, and the power supply of a circuit breaker control and motor is DC220V; the model parameter of the voltage transformer 4 is 110/√ 3/0.1/√ 3/0.1/√ 3/0.1,0.2/0.5/3P 50/50/100VA, and a star connection mode can provide a 0.2-level metering power supply, a 0.5-level measurement protection voltage and a 3P-level open triangular voltage; the model parameters of a power supply PT 5 are 110kV/63.5kV at a high-voltage side, 380V/220V at a low-voltage side, 2000VA at a capacity and a star connection mode.

As shown in fig. 6, the 110kV switching station is configured with a line protection 17, which mainly comprises a 50 instantaneous quick-break current relay, a 51 ac time-limit overcurrent relay, a 21-distance relay, and a 63-pressure relay, and realizes the protection function of the 110kV switching station; the electric meter 18 collects the voltage signal measured by the measuring winding of the voltage transformer and the current signal measured by the measuring level current transformer 11, and realizes the measuring function of the 110kV switch station.

As shown in fig. 7, 1 path of the dc screen ac incoming power supply comes from a power supply PT 5,1 path of the ac incoming power supply leads 0.4kV externally, incoming lines of the two paths of incoming power supplies are mechanically locked at power supplies KM1 and KM2, and only one of the two contactors can be switched on; the QF1 incoming line micro-break rated current selection is slightly smaller than the current of the maximum capacity operation of a power supply PT, the condition that the power supply PT is burnt due to overload is prevented, JK2, JK3 and JK4 alternating current feed-outs are all used as standby, all loads in a 110kV switching station preferentially select a more reliable direct current power supply DC220V, for example, power supplies such as an illuminating lamp, an electric heater and an HGIS equipment heat preservation sleeve are configured in a prefabricated cabin; the numbers of the HK 1-3 and the KK 1-3 are only schematic, the numbers can be adjusted according to actual needs of projects, the HK closing bus provides a closing power supply for the HGIS motor, and the KK control bus provides a device and a control power supply for the protection alarm device.

As shown in fig. 8, the power system carrier channel takes a dedicated channel phase-ground coupling channel as an example, and the main devices include a wave trap 21, a coupling capacitor 23, a combination filter 24, a high-frequency cable 25, and a dedicated transceiver (carrier) 26; the wave trapper is arranged at the position of the substation circuit breaker 20, high-frequency current is prevented from being shunted to a bus, attenuation is increased, when the 110kV substation is in T connection, the wave trapper is connected in series in front of the substation, the original high-frequency current is guaranteed not to be shunted, and therefore the original carrier communication channel cannot be influenced after the T connection.

The above embodiments are only for illustrating the structural conception and the characteristics of the present invention, and the purpose thereof is to enable the person skilled in the art to understand the contents of the present invention and to implement the present invention, so as not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims (7)

1. The utility model provides a be provided with protection device's switch station in prefabricated cabin, includes prefabricated cabin, external power equipment, its characterized in that: the prefabricated cabin is internally provided with a secondary screen cabinet, the secondary screen cabinet comprises a protection screen, a primary equipment control cabinet and a power screen, the top of the prefabricated cabin is provided with a switch device, a prefabricated cabin mounting frame is arranged outside the prefabricated cabin, the prefabricated cabin mounting frame comprises a mounting plate at the top of the prefabricated cabin, a bearing plate at the bottom of the prefabricated cabin and a support frame arranged between the support plate and the bearing plate.

2. A switchyard with protective means inside prefabricated cabins according to claim 1, characterized in that: the switch equipment comprises a lightning arrester, an isolation grounding switch, a voltage transformer, a power supply PT and a circuit breaker, wherein a heat insulation sleeve is arranged on the outer side of the circuit breaker.

3. A switchyard with protective means inside the prefabricated cabins according to claim 2, characterized in that: the power supply panel comprises a direct-current power supply panel and a storage battery panel, and the power supply PT comprises a direct-current panel alternating-current incoming line power supply for providing electric energy for the direct-current power supply panel.

4. A switchyard with protective means inside the prefabricated cabins according to claim 2, characterized in that: the external power equipment comprises carrier communication power equipment, the carrier communication power equipment comprises a carrier communication power equipment circuit, and a circuit wave trap used for preventing high-frequency current from shunting to a bus and increasing attenuation is arranged between the carrier communication power equipment circuit and the circuit breaker.

5. A switchyard with protective means inside the prefabricated cabins according to claim 2, characterized in that: the switchgear further comprises an HGIS combined electrical apparatus, a circuit breaker of the HGIS combined electrical apparatus and a current transformer, wherein the lightning arrester, the isolation grounding switch, the voltage transformer, the power supply PT and the HGIS combined electrical apparatus are connected through a lead and are arranged above the mounting plate.

6. The switching station with protection devices in the prefabricated cabins according to claim 1, characterized in that: the loading board becomes ship type structure, the both ends perk that makes progress of loading board, the length of loading board is less than the length of mounting panel, the both sides of loading board are provided with rings.

7. A switchyard with protective means inside prefabricated cabins according to claim 1, characterized in that: the support frame is including setting up the outside carriage in prefabricated cabin to and the bracing piece of connection between loading board and mounting panel, the bracing piece is provided with the detachable connector with loading board and mounting panel.

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