CN113451931A - Prefabricated box transformer substation assembly structure - Google Patents

Abstract

Prepackage type case becomes assembly structure belongs to distribution technical field, especially relates to a prepackage type case becomes assembly structure. The invention provides a pre-assembled box transformer substation assembly structure with a good use effect. The transformer comprises a box body, wherein a high-pressure chamber (102), a transformer chamber and a control chamber are arranged in the box body, and the transformer is characterized in that a transformer (1) is arranged in the transformer chamber, and a ring main unit (2) is arranged in the high-pressure chamber (102); the transformer comprises two boxes, the two boxes are arranged along the transverse direction, a first control chamber (103), a first transformer chamber (104) and a second transformer chamber (105) are sequentially arranged on the front side box from front to back, and a second control chamber (100), a third transformer chamber (101) and a high-voltage chamber (102) are sequentially arranged on the back side box from front to back.

Description

Prefabricated box transformer substation assembly structure

Technical Field

The invention belongs to the technical field of power distribution, and particularly relates to a pre-assembled box transformer substation assembly structure.

Background

The shield machine is a special engineering machine for tunneling, integrates light collection, mechanical, electrical, hydraulic, sensing and information technologies, and has the functions of excavating and cutting soil, conveying soil slag, assembling tunnel lining, measuring, guiding, correcting deviation and the like. The shield tunneling machine is widely used for tunnel engineering of subway, railway, highway, municipal administration, hydropower and the like. The shield machine is generally used in tunnels and is mostly in warm, damp, muddy and anti-seismic environments and rugged but simply designed environments.

The design of the shield machine transformer substation is usually suitable for a 6-meter shield machine, the capacity of the box transformer substation is only 2500KVA, and the conventional box transformer substation cannot meet the requirements of users along with continuous upgrading of shield machine equipment.

Disclosure of Invention

The invention aims at the problems and provides a pre-assembled box transformer substation assembly structure with a good use effect.

In order to achieve the purpose, the invention adopts the following technical scheme that the invention comprises a box body, wherein a high-voltage chamber (102), a transformer chamber and a control chamber are arranged in the box body, and the invention is characterized in that a transformer (1) is arranged in the transformer chamber, and a ring main unit (2) is arranged in the high-voltage chamber (102); the transformer comprises two boxes, the two boxes are arranged along the transverse direction, a first control chamber (103), a first transformer chamber (104) and a second transformer chamber (105) are sequentially arranged on the front side box from front to back, and a second control chamber (100), a third transformer chamber (101) and a high-voltage chamber (102) are sequentially arranged on the back side box from front to back.

As a preferable scheme, the first control room (103) is divided into two intervals from front to back, and the front end of each interval is provided with a double door; three groups of double doors are respectively arranged at the front ends of the first transformer chamber (104) and the second transformer chamber (105) from front to back;

the second control chamber (100) is divided into three compartments from front to back, the front end of each compartment is provided with a double door, and two sides of each compartment are vertically and uniformly provided with a plurality of mounting holes (3);

three groups of double doors are arranged at the front end of the third transformer chamber (101) from front to back; the front end of the high-pressure chamber (102) is provided with a double door.

As another preferred scheme, the bottom (10) of the box body is provided with a vent (51), fans (5) are arranged on two sides of the box body, a semi-U-shaped fan cover is covered on the outer side of each fan, the opening of the fan cover faces downwards, dustproof sponge (50) is arranged in the fan cover, and a reticular plate is arranged at the opening of the fan cover.

As another preferred scheme, the mesh size of the reticular lamina is 10mm multiplied by 10 mm.

As another preferable scheme, fire extinguishers (6) are arranged in the first control room (103), the second control room (100) and the third transformer room (101).

As another preferred scheme, the fire extinguisher provided by the invention adopts an ultrafine dry powder automatic fire extinguishing device, a fire signal output port of the ultrafine dry powder automatic fire extinguishing device is connected with a control port of an incoming line load switch, and the incoming line load switch is connected with an incoming line end of a ring main unit (2).

In another preferred embodiment, the transformers in the first transformer chamber (104), the second transformer chamber (105) and the third transformer chamber (101) are 2000KVA dry-type transformers.

As another preferred scheme, the box body of the invention adopts 8KD type open profile steel.

As another preferred scheme, the box body is provided with a limit switch for detecting the opening and closing of the box door, a detection signal output port of the limit switch is connected with a control port of the incoming line load switch, and the incoming line load switch is connected with an incoming line end of the ring main unit (2).

As another preferred scheme, the diameter of the mounting holes (3) is 9.2mm, and the distance between every two adjacent mounting holes (3) is 20 mm.

As another preferable scheme, the second control room (100) is internally provided with a device mounting beam (20), and the mounting beam (20) is provided with a guide rail (21).

As another preferred scheme, the front end of the box body is provided with a box door, and a toughened glass display window (4) is arranged on the box door.

As another preferred scheme, the transformer chamber is internally provided with a transformer temperature detection part (22) and a heat dissipation device (23), a control signal input port of the heat dissipation device is connected with a control signal output port of a controller, and a signal transmission port of the controller is connected with a signal transmission port of a display control panel on a box door.

As another preferred scheme, the transformer temperature detection part (22) adopts a PT100 platinum resistor, and the PT100 platinum resistor is embedded in a dry-type transformer winding.

Secondly, the heat dissipation device (23) adopts six heat dissipation fans, and the heat dissipation fans are arranged on the transformer and are respectively arranged in the front and the back.

In addition, the controller of the invention adopts an LD-B10-10 type controller.

The invention has the beneficial effects.

The invention divides the transformers into 3 groups and puts the 3 groups into 2 box transformers, and simultaneously reasonably arranges the control room and the high-voltage room to meet the requirements of equipment capacity and use space.

Drawings

The invention is further described with reference to the following figures and detailed description. The scope of the invention is not limited to the following expressions.

FIG. 1 is a schematic view of the structure of the rear side box body of the present invention.

FIG. 2 is a schematic structural diagram of the front side case of the present invention.

Fig. 3 is a bottom view of the fan cover of the present invention.

FIG. 4 is a top view of the bottom of the housing of the present invention.

FIG. 5 is a top view of the rear side box of the present invention.

FIG. 6 is a top view of the front side box of the present invention.

FIG. 7 is a front external view of the rear side case of the present invention.

FIG. 8 is a front external view of the front side case of the present invention.

FIG. 9 is a rear external view of the rear side case of the present invention.

FIG. 10 is a rear perspective view of the front side case of the present invention.

FIG. 11 is a diagram of a primary system of the present invention.

FIG. 12 shows a FIRE extinguisher control loop and a safety trip control loop, wherein MX is a trip coil, SB 1-8 are emergency stop buttons, N1-2, 7-9 LIMIT are threshold switches, and N3-4, 10-11 FIRE are FIRE extinguisher linkage contacts. When a fire disaster or other emergency occurs, the corresponding contacts are closed, and the opening coil acts to open the incoming cabinet.

Fig. 13 is a transformer temperature monitoring control loop, wherein 29DK is a transformer temperature controller, 1-2 contacts are a temperature controller control power supply, 3-10 fan interfaces, 13-14 alarm interfaces, 15-16 trip interfaces, and 19-22 analog quantity interfaces, when the transformer temperature exceeds a set value, 15-16 points are closed, a 29KA1 relay acts to cut off all low-voltage circuit breakers, and signals are transmitted to a background.

Fig. 14 is a power monitoring system, in which 11P1 is a multifunctional meter, 1-4 are sampling voltages, 5-10 are sampling currents, 11-13 are controller power supplies, and 34-35 relay output points, the multifunctional meter (11) has functions of under-voltage, over-voltage, and phase sequence monitoring protection besides displaying power parameters, when a certain power parameter exceeds a set value, 34-35 points are closed, and 11KA1 relays act to cut off all low-voltage circuit breakers, and transmit signals to a background.

Fig. 15 is a safety protection control circuit, in which 27KAU is a safety relay, a 1-a 2 are relay power supplies, 13-14, 23-24 are relay output interfaces, S11-S12, S21-S22 are relay forced output interfaces, and S33-S34 are relay fault reset interfaces, where when a fault occurs in the control circuit, contacts 13-14, 23-24 are closed, all low-voltage circuit breakers are cut off, and after the fault is removed, the safety relay needs to be manually restored.

Fig. 16, fig. 17, fig. 18 are earth leakage protection control circuit, wherein 25GF is 4 return circuits that residual current control ware can monitor, 12 ~ 13 are the power, 34 ~ 41 are relay output interface, 1 ~ 5 residual current transformer interface, each low pressure moulded case circuit breaker disposes a residual current transformer, moulded case internally mounted voltage-losing coil, when a certain circuit breaker takes place the electric leakage, pass to the controller with the electric leakage signal through residual current transformer, correspond the relay action simultaneously, cut off corresponding moulded case circuit breaker.

Fig. 19-23 show remote I/O modules, wherein 2 groups of 32-bit I/O modules (31 A3-4) are selected according to actual requirements of field equipment, and circuit breakers, micro-breaks, leakage alarm signals, transformer temperature alarm signals and the like of the plastic shell in the box transformer substation are transmitted to a background, because 3 groups of transformers need to acquire temperature signals in an 8 m shield, 2 groups of analog quantity modules (31a 1-2) are provided, each module can acquire 2 groups of analog quantity signals, and an ethernet interface (31a0) is provided, so that communication with the background is facilitated.

Detailed Description

As shown in the figure, the prefabricated box transformer substation assembly structure can be applied to a prefabricated box transformer substation, the prefabricated box transformer substation comprises a box body and a control circuit, a high-pressure chamber (102), a transformer chamber and a control chamber are arranged in the box body, a transformer (1) is arranged in the transformer chamber, and a ring main unit (2) is arranged in the high-pressure chamber (102);

the control circuit comprises a primary system part, a fire extinguisher and safety trip control loop, a transformer temperature control loop, an electric energy monitoring part, a protection control loop, an electric leakage protection module and a remote I/O module, wherein power ports of the fire extinguisher and the safety trip control loop are respectively connected with a power port of the electric energy monitoring part, a power port of the protection control loop, a power port of the electric leakage protection module and a power port of the remote I/O module, a feedback signal output port of the primary system part is connected with a feedback signal input port of the remote I/O module, a control signal output port of the transformer temperature control loop is connected with a control signal input port of the electric leakage protection module, a control signal output port of the electric energy monitoring part is connected with a control signal input port of the electric leakage protection module, a control signal output port of the protection control loop is connected with control signal input ports of the fire extinguisher and the safety trip control loop, and a feedback signal output port of the leakage protection module is connected with a feedback signal input port of the remote I/O module.

The transformer comprises two boxes, the two boxes are arranged along the transverse direction, a first control chamber (103), a first transformer chamber (104) and a second transformer chamber (105) are sequentially arranged on the front side box from front to back, and a second control chamber (100), a third transformer chamber (101) and a high-voltage chamber (102) are sequentially arranged on the back side box from front to back.

The first control room (103) is divided into two intervals from front to back, and the front end of each interval is provided with a double door; three groups of double doors are respectively arranged at the front ends of the first transformer chamber (104) and the second transformer chamber (105) from front to back;

the second control chamber (100) is divided into three compartments from front to back, the front end of each compartment is provided with a double door, and two sides of each compartment are vertically and uniformly provided with a plurality of mounting holes (3);

three groups of double doors are arranged at the front end of the third transformer chamber (101) from front to back; the front end of the high-pressure chamber (102) is provided with a double door.

The box body bottom (10) is provided with a vent (51), fans (5) are arranged on two sides of the box body, a semi-U-shaped fan cover is covered on the outer side of each fan, the opening of each fan cover faces downwards, dustproof sponge (50) is arranged in each fan cover, and a meshed plate is arranged at the opening of each fan cover.

The mesh size of the reticular lamina is 10mm multiplied by 10 mm.

Fire extinguishers (6) are arranged in the first control room (103), the second control room (100) and the third transformer room (101).

The fire extinguisher adopts an ultrafine dry powder automatic fire extinguishing device, a fire signal output port of the ultrafine dry powder automatic fire extinguishing device is connected with a control port of an incoming line load switch, and the incoming line load switch is connected with an incoming line end of the ring main unit (2).

The transformers in the first transformer chamber (104), the second transformer chamber (105) and the third transformer chamber (101) are 2000KVA dry-type transformers.

The box body is made of 8KD type open profile steel.

The box body is provided with a limit switch for detecting the opening and closing of the box door, the detection signal output port of the limit switch is connected with the control port of the incoming line load switch, and the incoming line load switch is connected with the incoming line end of the ring main unit (2).

The diameter of the mounting hole (3) is 9.2mm, and the distance between every two adjacent mounting holes (3) is 20 mm.

The second control room (100) is internally provided with a device mounting beam (20), and the mounting beam (20) is provided with a guide rail (21).

The residual current controller 7, the safety relay 8, the I/O module 9, the molded case circuit breaker 12, the WeChat circuit breaker 13, the residual current detector 14, the intermediate relay 15, the switching power supply 16, the wiring terminal 17, the isolating switch fuse group 18 and the double power supplies 19 are arranged on a mounting beam (20).

The front end of the box body is provided with a box door, and a toughened glass display window (4) is arranged on the box door.

A transformer temperature detection part (22) and a heat dissipation device (23) are arranged in the transformer chamber, a control signal input port of the heat dissipation device is connected with a control signal output port of the controller, and a signal transmission port of the controller is connected with a signal transmission port of a display control panel on the box door.

And cutting off the power supply to send out an alarm once the temperature is found to exceed the alarm limit. The controller sends out a control signal to the feed line load switch, the load switch trips, and the alarm gives an alarm through the panel.

The transformer temperature detection part (22) adopts a PT100 platinum resistor, and the PT100 platinum resistor is pre-embedded in a dry type transformer winding.

The heat dissipation device (23) adopts six heat dissipation fans which are arranged on the transformer and are respectively arranged in the front and the back.

The controller adopts an LD-B10-10 type controller.

The primary system part comprises frame circuit breakers 05Q 1-05Q 4, one end of an MCC02 (a primary loop is a single line diagram, two lines connected with the MCC02 in the diagram and each line represents 3 live wires) of a lower distribution box is respectively connected with a first voltmeter, a first ammeter, one end of a first transformer and one end of a frame circuit breaker 05Q3 through a frame circuit breaker 05Q1, the other end of an MCC02 of the lower distribution box is respectively connected with a second voltmeter, a second ammeter, one end of a second transformer and one end of a frame circuit breaker 05Q4 through a frame circuit breaker 05Q2, the other end of the frame circuit breaker 05Q3 is connected with one end of the MCC03 of the lower distribution box, and the other end of the frame circuit breaker 05Q4 is connected with the other end of the MCC03 of the lower distribution box; 05Q1 ~ 05Q4 provide the power for the lower distribution box.

The other end of the first transformer is respectively connected with one end of a main switch, one end of a switch V2 and one end of a switch V3 through a switch V1, and the other end of the V2 is connected with the other end of the second transformer;

the other end of the V3 is connected with one end of a third transformer, a first joint at the other end of the third transformer is respectively connected with one end of a third voltmeter, one end of a third ammeter, one end of a single-pole double-throw toggle end, one end of a 13Q1, one end of a 13Q2, one end of a 13Q3 and one end of a 13Q4, and a second joint at the other end of the third transformer is respectively connected with one end of a fourth voltmeter, one end of a fourth ammeter, one end of a 17Q1 and one end of a 17Q 2;

the single-pole double-throw fixed ends are respectively connected with one end of a fifth voltmeter, one end of a fifth ammeter, one end of a fuse and one end of a 15Q7, the other end of the fuse is connected with one end of a control transformer (24) (the control transformer (24) converts 380V voltage into 110V-0V-110V voltage and is used as a control loop power supply), the other end of the control transformer (24) is respectively connected with one end of a 15Q1, one end of a 15Q2 and one end of a 15Q3, the other end of the 15Q1 is connected with another end of PDE30, the other end of the 15Q2 is connected with a PDE31, the other end of the 15Q3 is connected with another end of PDE32, the other end of the 15Q7 is connected with MCC10, the other end of 13Q1 is connected with MCC05, the other end of the 13Q2 is connected with another MCC 11, the other end of 13Q 09, the 13Q4 is connected with another MCC08, the other end of 17Q2 is connected with MCC04, and the other end of 17Q1 is connected with the MCC 01.

13Q1-13Q4, 15Q1-15Q3, 15Q7, 17Q2 and 17Q1 are molded case circuit breakers for supplying power to the lower-level distribution boxes. PDE30-PDE32, MCC10, MCC05, PDE11, MCC09, MCC08, MCC04, MCC01 are subordinate switchgears.

In the figure, PDE30 is connected with only one line, the line represents 3 live wires, the MCC02 box is a lower-level distribution box, and the user needs 2 incoming lines, so the number of the incoming lines is 2, and each line has 3 live wires.

The 10KV power supply firstly enters the incoming line cabinet C, when the C cabinet is switched on, the feeder line cabinets V1-V3 are powered, when the V1-V3 are switched on, the high voltage of the corresponding three groups of transformers is tested and powered, meanwhile, the 10KV high voltage is converted into the 0.4KV low voltage, the low voltage side of the transformers is connected with the molded case circuit breaker and the frame switches, the switches provide power for the lower-level distribution boxes, after any one switch is switched on, the lower-level distribution boxes are powered, the current and the voltage of the transformers are monitored, the power instrument is adopted, and the transformers are controlled to convert the 0.4KV power supply into 110V-0V-110V to provide power for the power instrument.

The FIRE extinguisher and safety trip control loop comprises a brake separating coil MX (controlling the on-off of an incoming load switch), one end of the MX is connected with 1L0 through a fuse, the other end of the MX is respectively connected with one end of a SUB30 rear right emergency stop switch SB4, one end of a SUB30 rear left emergency stop switch SB3, one end of a SUB30 front right emergency stop switch SB2, one end of a SUB30 front left emergency stop switch SB1, one end of an N1# SUB 9 transformer room door LIMIT switch N1# LIMIT, one end of an N2# SUB30 transformer room door LIMIT switch N2# LIRE, an N3# SUB30 FIRE extinguisher linkage point switch (a FIRE guide cable is arranged on a FIRE extinguisher body, when the FIRE guide cable is ignited, the FIRE extinguisher linkage point acts to cut off the incoming load switch at the moment), one end of an N3# FIRE, one end of an N4# FIRE linkage point switch N4, one end of an end of a SUB 4# FIRE switch SB4, one end of a SUB 4 rear right emergency stop SB4, an SB4 end of a SUB 4# 4 switch, One end of a SUB31 front left emergency stop switch SB5, one end of an N7# SUB31 transformer chamber door LIMIT switch N7# LIMIT, one end of an N8# SUB31 transformer chamber door LIMIT switch N8# LIMIT, one end of an N9# SUB31 transformer chamber door LIMIT switch N9# LIMIT, one end of an N10# SUB31 FIRE extinguisher linkage point switch N10# FIRE and one end of an N11# SUB31 FIRE extinguisher linkage point switch N11# FIRE are connected;

the other end of a SUB30 rear right emergency stop switch SB4, the other end of a SUB30 rear left emergency stop switch SB3, the other end of a SUB30 front right emergency stop switch SB2, the other end of a SUB30 front left emergency stop switch SB1, the other end of a N1# SUB30 transformer chamber door LIMIT switch N1# LIMIT, the other end of a N2# SUB30 transformer chamber door LIMIT switch N2# LIMIT, the other end of a N3# 30 FIRE extinguisher linkage point switch N3# FIRE, the other end of a N4# SUB30 FIRE extinguisher linkage point switch N4# FIRE, the other end of a SUB 4 rear right emergency stop switch SB4, the other end of a SUB 4 rear left emergency stop switch SB4, the other end of a SUB 4# FIRE extinguisher door transformer SB4, the other end of a SUB 4# 4 transformer door LIMIT switch N4, the other end of a N4# 4 FIRE extinguisher door linkage point switch N4, the other end of a SUB 4# FIRE extinguisher door switch, The other end of the linkage point switch N11 FIRE of the FIRE extinguisher N11# SUB31 is connected with one end of the switch of the ring main unit, and the other end of the switch of the ring main unit is connected with 1N 0.

The front, the back, the left and the right represent the position of an emergency stop switch, and 08SB 1-08 SB4 in the panel are emergency stop buttons. The emergency stop switches are arranged at four positions, namely the front position, the rear position, the left position and the right position, so that when safety problems occur on site, the incoming line load isolating switch can be cut off at the first time to ensure that the whole box transformer substation is powered off, namely, the emergency stop switches off the power supply, and the primary loop power supply is cut off. If the switching action is detected, the MX pair controls the integral power-off of the incoming line load isolating switch.

The transformer temperature control loop comprises transformer temperature controllers 29DK, 1 pin and 2 pin of 29DK are correspondingly connected with 1L20.2 pin and 1L20.1 pin respectively, 3-5 pins of 29DK are correspondingly connected with L ends of fans fan 1-fan 3 (the assembly drawing 23 is a heat dissipation fan and is arranged on a transformer, 3 pins are symmetrical front and back and are correspondingly connected with the L ends of fans fan 1-fan 3532 without sequentially connecting a power supply, 6 pins of 29DK are connected with N ends of fan 1- fan 3, 6 pins of 29DK are connected with the L ends of fans fan 4-fan 6 (the assembly drawing 23 is a heat dissipation fan and is arranged on the transformer, 3 pins are symmetrical front and back and are connected with the power supply sequentially and are simultaneously started and stopped), 8-10 pins of 29DK are correspondingly connected with the L ends of fans fan 4-fan 6 respectively, 15 pins of 29DK are connected with 1L20.1 pin and 16 pins of 29DK are correspondingly connected with a relay 1 KA.

The transformer temperature controller (10) adopts an LD-B10-10 type temperature controller.

The electric energy monitoring part comprises multifunctional power meters (panel diagram number 11), 11P1, pins 35 of 11P1 are respectively connected with pins 13 of 1N0 and 11P1 through a control end of a relay 11KA1, pins 34 of 11P1 are respectively connected with one ends of 1L0 and a fuse 11Q3, and the other end of 11Q3 is connected with pin 12 of 11P 1; pin 11 of 11P1 is grounded;

5-6 pins of the 11P1 are connected with an output port of a three-phase current transformer (detecting the current on the low-voltage side of the transformer), 1-4 pins of the 11P1 are connected with three-phase power through a fuse 11Q1, and the three-phase power is grounded through a contactor 11Q2 and a surge protector 11PRD in sequence.

The multifunctional electric power meter adopts an APMD type electric power meter.

The protection control circuit comprises a protection control circuit, a1 and a2 ports of safety relays (assembly figure 8) 27KAU and 27KAU are respectively and correspondingly connected with 15L04 and 15N04 (A1 and A2 are power supplies of the safety relays, 15L04 and 15N04 represent that 110V power supplies are connected into A1 and A2, and actually the power supplies are converted from control transformation), 13 pins of 27KAU are connected with 1L0 and 23 pins of 27KAU are connected with SUB31 (the prefabricated box is changed into a 2-station 1-set product, one box is named as SUB30 and the other is called SUB 31), and an S11 port of 27KAU is connected with an S12 port of 27KAU through six emergency stop buttons (used for cutting off all low-voltage circuit breakers, and 6 emergency stop boxes are no longer reserved in the field), and the S12 port of 27 12 is connected with the S12 port of 27 12 through the emergency stop buttons;

the S24 port of 27KAU is connected with SUB31, the 14 pin of 27KAU is connected with 18-1 (which is a signal for cutting off all circuit breakers), the Y36 and Y37 ports of 27KAU are connected, and the S34 port of 27KAU is connected with the S33 port of 27KAU through a switch 27SB 1.

The safety relay adopts a PILZ type relay.

The leakage protection module comprises residual current detectors 25GF and 26GF, wherein L, N ports of the 25GF are correspondingly connected with 1L0 and 1N0 respectively, a J1 port of the 25GF is controlled and terminated with 1L0 through a relay 25K1, a J2 port of the 25GF is controlled and terminated with 1L0 through a relay 25K2, a COM port of the 25GF is connected with 1N0, a J3 port of the 25GF is controlled and terminated with 1L0 through a relay 25K3, a J4 port of the 25GF is controlled and terminated with 1L0 through a relay 25K4, and a COM port of the 25GF is connected with 1N 0;

the I1, I2, I3 and I4 ports of the 25GF are connected with the CM1 port of the 25GF through residual current transformer probes 13T1, 13T2, 13T3 and 13T4 respectively;

the L, N port of 26GF is correspondingly connected with 1L0 and 1N0 respectively, the J1 port of 26GF is connected with 1L0 through the control of a relay 26K1, the J2 port of 26GF is connected with 1L0 through the control of a relay 26K2, the COM port of 26GF is connected with 1N0, the J3 port of 26GF is connected with 1L0 through the control of a relay 26K3, and the COM port of 26GF is connected with 1N 0;

i1, I2 and I3 ports of the 26GF are connected with a CM1 port of the 26GF through residual current transformer probes 15T1, 17T1 and 17T2 respectively;

1L0 is connected with one end of a controlled normally closed switch of a protective relay 11KA1, one end of a controlled normally closed switch of a relay 14KA1 and one end of a controlled normally closed switch of a relay 12KA1 through a controlled normally open switch of a safety relay 27KAU and a controlled normally closed switch of a transformer overtemperature protective relay 29KA1 in sequence;

the other end of the controlled normally closed switch of 11KA1 is respectively connected with one end of a controlled normally closed switch of a relay 25K1, one end of a controlled normally closed switch of a relay 25K2, one end of a controlled normally closed switch of a relay 25K3 and one end of a controlled normally closed switch of a relay 25K4, the other end of the controlled normally closed switch of 25K1 is respectively connected with one end of 13UV1 and one end of an indicator light 18D1, and the other end of 13UV1 is respectively connected with the other end of 18D1 and 1N 0;

the other end of the 25K2 controlled normally closed switch is respectively connected with one end of 13UV2 and one end of an indicator light 18D2, and the other end of 13UV2 is respectively connected with the other end of 18D2 and 1N 0;

the other end of the 25K3 controlled normally closed switch is respectively connected with one end of 13UV3 and one end of an indicator light 18D3, and the other end of 13UV3 is respectively connected with the other end of 18D3 and 1N 0;

the other end of the 25K4 controlled normally closed switch is respectively connected with one end of 13UV4 and one end of an indicator light 18D4, and the other end of 13UV4 is respectively connected with the other end of 18D4 and 1N 0;

the other end of the controlled normally closed switch of 14KA1 is respectively connected with one end of 15UV7 and one end of an indicator light 18D5 through the controlled normally closed switch of a relay 26K1, and the other end of 15UV7 is respectively connected with the other ends of 1N0 and 18D 5;

the other end of the controlled normally closed switch of 12KA1 is respectively connected with one end of the controlled normally closed switch of the relay 26K2 and one end of the controlled normally closed switch of the relay 26K3, the other end of the controlled normally closed switch of 26K2 is respectively connected with one end of 17UV1 and one end of an indicator lamp 18D6, and the other end of 17UV1 is respectively connected with the other ends of 1N0 and 18D 6;

the other end of the controlled normally closed switch of 26K3 is respectively connected with one end of 17UV2 and one end of indicator light 18D7, and the other end of 17UV2 is respectively connected with the other ends of 1N0 and 18D 7.

13UV1, 13UV2, 13UV3, 13UV4, 15UV7, 17UV1 and 17UV2 are voltage-loss coils, and control circuit breakers 15Q1-15Q 4, 15Q7, 17Q1 and 17Q2 respectively, and when the voltage of the 1-time loop is too low, the circuit breaker corresponding to the action of the voltage-loss coil is opened.

26GF is used for controlling 26K1, 26K2 and 26K3, and the usage is the same as that of 25K 1-25K 3.

The residual current controller adopts an ARCM type controller.

The remote I/O MODULE comprises a switch power supply 31U1 (alternating current 110V is converted into direct current 24V), the input end of 31U1 is respectively connected with 1L0 and 1N0, and the output end of 31U1 is connected with the power supply end of a CONTROL LNET SINGLE MEDIA ADAPTOR MODULE (network adapter 1794-ACN 15);

the 0 port of 31A3 is connected with the AO port of the transformer temperature controller 29DK, the 17 port of 31A3 is respectively connected with the 19 port of 31A3, the 21 port of 31A3 and the COM port of 29DK, the BO port of 29DK is connected with the 2 port of 31A3, and the CO port of 29DK is connected with the 4 port of 31A 3;

the 0 port of the 31A4 is connected with the AO port of the transformer temperature controller 46DK, the 17 port of the 31A4 is respectively connected with the 19 port of the 31A4, the 21 port of the 31A4 and the COM port of the 46DK, the BO port of the 46DK is connected with the 2 port of the 31A4, and the CO port of the 46DK is connected with the 4 port of the 31A 4;

the 6 ports of the 31A4 are connected with the AO port of the transformer temperature controller 47DK, the 23 ports of the 31A4 are respectively connected with the 25 ports of the 31A4, the 27 ports of the 31A4 and the COM port of the 47DK, the BO port of the 47DK is connected with the 8 ports of the 31A4, and the CO port of the 47DK is connected with the 10 ports of the 31A 4;

31A with port 0 connected to 17Q-SED (CBM) switch, 31A with port 17 connected to 26K MCC group fault trip switch, 31A with port 1 connected to 05Q-SDE (CBM 02) switch, 31A with port 18 connected to 48KA 148 KA group fault trip switch, 31A with port 2 connected to 05Q-SDE (CBM 02) switch, 31A with port 19 connected to 05Q-SDE (CBM 03) switch, 31A with port 3 connected to 05Q-SDE (CBM 03) switch, 31A with port 20 connected to 26K MCC group fault trip switch, 31A with port 4 connected to 17Q-SDE (CBM) switch, 31A with port 21 connected to 25K MCC group fault trip switch, 31A with port 22 connected to 25K group fault trip switch, 31A with port 6 connected to 16Q-SDE (CBM) switch, 31A with port 6K connected to 25K group fault trip switch, the 7 port of the 31A1 is connected with a 16Q4-SDE (CBM08) switch, and the 24 port of the 31A1 is connected with a 25K2 PDE11 group fault trip switch;

the 0 port of 31A2 is connected to 20Q1-SDE (CBM50-01) switch, the 17 port of 31A2 is connected to 24Q 2-SDE (CBM 2-18) switch, the 1 port of 31A2 is connected to 21Q2-SDE (CBM 2-02) switch, the 18 port of 31A2 is connected to 24Q 2-SDE (CBM 2-19) switch, the 2 port of 31A2 is connected to 21Q2-SDE (CBM 2-03) switch, the 19 port of 31A2 is connected to 24Q 2-SDE (CBM 2-20) switch, the 3 port of 31A2 is connected to 21Q2-SDE (CBM 2-04) switch, the 4 port of 31A2 is connected to 21Q2-SDE (CBM 2-05) switch, the 5 port of 31A2 is connected to 22Q 2-SDE (CBM 2-SDM 2-3608) switch, the 5 port of 31A2 is connected to CBM 3607, the CBM 3608 is connected to CBM 2-SDM 3608 switch.

The transformer temperature controller adopts an LD-B10-10 type temperature controller.

The switches connected to 31a1 and 31a2 are used for signal feedback.

31A0, 31A1,31A2, 31A3 and 31A4 belong to PLC acquisition equipment, wherein 31A0 is a network adapter 1794-ACN15 used as a communication module, and 31A1 and 31A2 are digital input modules 1756-IB32, 31A3 and 31A4 analog input modules 1756-IE 16.

The invention is suitable for 8 m shield machines and is used as a pre-installed box transformer with the transformer capacity of 6000 KVA.

The height and the depth of the box transformer substation can be H x D =2200mm x 2000mm, and the box transformer substation has the functions of convenience in mounting and dismounting, ventilation and corrosion prevention, transformer temperature monitoring, electrical monitoring, fire alarm and fire extinguishing and the like.

According to the invention, under the condition of meeting the equipment capacity, 6000KVA transformers are divided into 3 groups of 2000KVA transformers and placed into 2 box transformers (1), so that the equipment capacity is met, and meanwhile, the occupied space is small.

The incoming line of the invention adopts a ring main unit (2) framework which can adopt 8KD type open section steel, two sides of the section steel are respectively provided with a mounting hole (3) with the modulus of 20mm and the diameter of 9.2, components are mounted on a mounting beam, a guide rail is mounted on the mounting beam, the components are convenient to mount, dismount and maintain, the integral assembly capability is strong, a front panel displays and a toughened glass display window (4).

The ventilation design becomes bottom punching press vent (51) at the case, and the case becomes both sides and adds the fan and carry out forced draft, and the outside adopts half U type structure to cover the fan, and the cavernosum has been put to inside, and the end opening adopts the reticular lamina to install, and rain-proof, dirt-proof effect has been played to this structure.

The whole box body can be sprayed by using white paint with high glossiness, and RAL9010 is pure white or similar in color. The metal surface is clean and has strong corrosion resistance.

The fire extinguisher is arranged in each unit by adopting the superfine dry powder automatic fire extinguishing device (6), the top end of the fire extinguisher is provided with a fire guiding rope and a pair of normally open contacts, once a fire disaster happens, the fire extinguisher is opened by the fire guiding rope to extinguish the fire, and meanwhile, the normally open point of the fire extinguisher is closed to send a signal to a shunt coil of an incoming line load switch, so that a high-voltage part is cut off immediately, and the loss is reduced to the minimum.

The tank transformer is divided into a high-voltage chamber (102), a transformer chamber and a control system unit, all of which must be placed separately from each other, i.e. ideally with their own respective areas.

A group of ring main units are adopted in the high-voltage chamber (102), wherein shunt coils are arranged in the incoming line cabinet and are connected with limit switches on cabinet doors of the transformer chamber and the low-voltage chamber, once a person opens the cabinet door or a safety baffle of the transformer chamber, the high-voltage part is tripped and cut off immediately, and meanwhile, emergency stop buttons are arranged on the periphery of the box transformer substation to cut off the high-voltage part at any time. As shown in fig. 12.

The dry-type transformer is installed to the transformer room, can produce higher heat when equipment moves, the temperature of real-time supervision transformer, heat-radiating equipment reduces the temperature of transformer, adopt transformer temperature controller, the external 6 radiators of controller are used for reducing the transformer temperature, carry out real-time supervision to the transformer temperature through the serial ports line, show the temperature of transformer three-phase on the panel, can set up high temperature and ultra-temperature alarm limit on the controller, in case find the temperature surpass the alarm limit will cut off the power and send the warning. As shown in fig. 13.

And the control system unit is internally provided with an electric leakage and power display monitoring and safety protection module.

The electric energy display and monitoring adopts a multifunctional meter which is mainly used for detecting the output end of the transformer and displaying three-phase current, voltage, active power, reactive power, electroplating, harmonic waves and the like. As shown in fig. 14.

When the safety protection module selects the safety relay and breaks down in an electric loop, all low-voltage circuit breakers trip immediately and the circuit breakers cannot be switched on again when no fault is relieved, so that further equipment damage is avoided. As shown in fig. 15.

The residual current controller and the current transformer are combined with each other in the electric leakage protection module, once a wire penetrating through the current transformer leaks electricity, the corresponding relay acts immediately to cut off a main power supply of a loop, and meanwhile, the size of a leakage current value is displayed on the module and an alarm is sent out. As shown in fig. 17.

The remote I/O module transmits the state, fault position and power quality of each switch in the box transformer substation to the background through communication, so that personnel management is reduced, and maintenance time is also reduced. As shown in fig. 18.

It should be understood that the detailed description of the present invention is only for illustrating the present invention and is not limited by the technical solutions described in the embodiments of the present invention, and those skilled in the art should understand that the present invention can be modified or substituted equally to achieve the same technical effects; as long as the use requirements are met, the method is within the protection scope of the invention.

Claims (10)

1. The prefabricated box transformer substation assembly structure comprises a box body, wherein a high-pressure chamber (102), a transformer chamber and a control chamber are arranged in the box body, and the prefabricated box transformer substation assembly structure is characterized in that a transformer (1) is arranged in the transformer chamber, and a ring main unit (2) is arranged in the high-pressure chamber (102); the transformer comprises two boxes, the two boxes are arranged along the transverse direction, a first control chamber (103), a first transformer chamber (104) and a second transformer chamber (105) are sequentially arranged on the front side box from front to back, and a second control chamber (100), a third transformer chamber (101) and a high-voltage chamber (102) are sequentially arranged on the back side box from front to back.

2. The pre-assembled box transformer substation assembly structure according to claim 1, wherein the first control chamber (103) is divided into two compartments from front to back, and each compartment is provided with a double door at the front end; three groups of double doors are respectively arranged at the front ends of the first transformer chamber (104) and the second transformer chamber (105) from front to back;

the second control chamber (100) is divided into three compartments from front to back, the front end of each compartment is provided with a double door, and two sides of each compartment are vertically and uniformly provided with a plurality of mounting holes (3);

three groups of double doors are arranged at the front end of the third transformer chamber (101) from front to back; the front end of the high-pressure chamber (102) is provided with a double door.

3. The pre-assembled box transformer substation assembly structure according to claim 1, wherein the bottom (10) of the box body is provided with a vent (51), fans (5) are arranged on two sides of the box body, a semi-U-shaped fan cover is covered on the outer side of each fan, the opening of each fan cover faces downwards, a dustproof sponge (50) is arranged in each fan cover, and a reticular plate is arranged at the opening of each fan cover.

4. The pre-assembled box transformer substation assembly structure according to claim 1, wherein fire extinguishers (6) are disposed in the first control chamber (103), the second control chamber (100) and the third transformer chamber (101).

5. The pre-assembled box transformer substation assembly structure of claim 1, characterized in that the fire extinguisher adopts an ultra-fine dry powder automatic fire extinguishing device, a fire signal output port of the ultra-fine dry powder automatic fire extinguishing device is connected with a control port of an incoming line load switch, and the incoming line load switch is connected with an incoming line end of the ring main unit (2).

6. The pre-assembled box transformer substation assembly structure of claim 1, wherein the box body is provided with a limit switch for detecting the opening and closing of a box door, a detection signal output port of the limit switch is connected with a control port of an incoming line load switch, and the incoming line load switch is connected with an incoming line end of the ring main unit (2).

7. The pre-assembled box transformer substation assembly structure according to claim 1, wherein the second control chamber (100) is internally provided with a device mounting beam (20), and the mounting beam (20) is provided with a guide rail (21).

8. The pre-assembled box transformer substation assembly structure according to claim 1, wherein a box door is arranged at the front end of the box body, and a tempered glass display window (4) is arranged on the box door.

9. The pre-assembled box transformer substation assembly structure according to claim 1, wherein the transformer chamber is provided with a transformer temperature detection portion (22) and a heat dissipation device (23), a control signal input port of the heat dissipation device is connected to a control signal output port of the controller, and a signal transmission port of the controller is connected to a signal transmission port of a display control panel on the box door.

10. The pre-assembled box transformer substation assembly structure of claim 9, wherein the heat dissipation device (23) comprises six heat dissipation fans, and the heat dissipation fans are arranged on the transformer, three in front of and three in back of the transformer.

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