A prefabricated substation control circuit

Abstract

A prefabricated box-type substation control circuit belongs to the field of power distribution technology, and particularly relates to a prefabricated box-type substation control circuit. The present invention provides a prefabricated box-type substation control circuit with good use effect. The prefabricated box-type substation control circuit of the present invention includes a primary system part, a fire extinguisher and safety trip control circuit, a transformer temperature control circuit, an electric energy monitoring part, a protection control circuit, a leakage protection module and a remote I / O module. The power supply ports of the fire extinguisher and safety trip control circuit are respectively connected to the power supply ports of the electric energy monitoring part, the protection control circuit, the leakage protection module and the remote I / O module. The feedback signal output port of the primary system part is connected to the feedback signal input port of the remote I / O module. The control signal output port of the transformer temperature control circuit is connected to the control signal input port of the leakage protection module.

Description

Technical Field

[0001] The present invention belongs to the technical field of power distribution, and particularly relates to a prefabricated substation control circuit. Background Art

[0002] A shield machine, whose full name is a shield tunnel boring machine, is a special construction machinery for tunnel boring. It integrates optics, mechanics, electricity, hydraulics, sensors, information technology, and has functions such as excavating and cutting soil, transporting soil slag, assembling tunnel linings, measuring and guiding deviation correction. Shield tunneling machines have been widely used in tunnel projects such as subways, railways, highways, municipal engineering, and hydropower. Shield machines are generally used in tunnels, mostly in warm, humid, muddy environments with large seismic resistance, as well as rough but simple-designed environments.

[0003] The design of shield machine substations is usually applicable to 6-meter shield machines, and the capacity of the box-type substation is only 2500 KVA. With the continuous upgrading of shield machine equipment, conventional box-type substations can no longer meet the needs of users. Summary of the Invention

[0004] The present invention aims at the above problems and provides a prefabricated substation control circuit with good use effect.

[0005] To achieve the above object, the present invention adopts the following technical solutions. The prefabricated substation control circuit of the present invention includes a primary system part, a fire extinguisher and safety trip control circuit, a transformer temperature control circuit, an electric energy monitoring part, a protection control circuit, a leakage protection module, and a remote I / O module. The power supply ports of the fire extinguisher and safety trip control circuit are respectively connected to the power supply ports of the electric energy monitoring part, the protection control circuit, the leakage protection module, and the remote I / O module. The feedback signal output port of the primary system part is connected to the feedback signal input port of the remote I / O module. The control signal output port of the transformer temperature control circuit is connected to the control signal input port of the leakage protection module. The control signal output port of the electric energy monitoring part is connected to the control signal input port of the leakage protection module. The control signal output port of the protection control circuit is connected to the control signal input port of the fire extinguisher and safety trip control circuit. The feedback signal output port of the leakage protection module is connected to the feedback signal input port of the remote I / O module.

[0006] As a preferred solution, the primary system part of the present invention includes frame circuit breakers 05Q1 to 05Q4. One end of the lower-level distribution box MCC02 is respectively connected to one end of the first voltmeter, the first ammeter, one end of the first transformer, and one end of the frame circuit breaker 05Q3 through the frame circuit breaker 05Q1. The other end of the lower-level distribution box MCC02 is respectively connected to one end of the second voltmeter, the second ammeter, one end of the second transformer, and one end of the frame circuit breaker 05Q4 through the frame circuit breaker 05Q2. The other end of the frame circuit breaker 05Q3 is connected to one end of the lower-level distribution box MCC03, and the other end of the frame circuit breaker 05Q4 is connected to the other end of the lower-level distribution box MCC03;

[0007] The other end of the first transformer is respectively connected to one end of the main switch, one end of the switch V2, and one end of the switch V3 through the switch V1. The other end of V2 is connected to the other end of the second transformer;

[0008] The other end of V3 is connected to one end of the third transformer. The other end of the third transformer is respectively connected to one end of the third voltmeter, the third ammeter, one end of the single-pole double-throw toggle end, one end of 13Q1, one end of 13Q2, one end of 13Q3, and one end of 13Q4. The second connector at the other end of the third transformer is respectively connected to one end of the fourth voltmeter, the fourth ammeter, one end of 17Q1, and one end of 17Q2;

[0009] The single-pole double-throw fixed end is respectively connected to one end of the fifth voltmeter, the fifth ammeter, one end of the fuse, and one end of 15Q7. The other end of the fuse is connected to one end of the control transformer (24). The other end of the control transformer (24) is respectively connected to one end of 15Q1, one end of 15Q2, and one end of 15Q3. The other end of 15Q1 is connected to PDE30, the other end of 15Q2 is connected to PDE31, the other end of 15Q3 is connected to PDE32, the other end of 15Q7 is connected to MCC10, the other end of 13Q1 is connected to MCC05, the other end of 13Q2 is connected to PDE11, the other end of 13Q3 is connected to MCC09, the other end of 13Q4 is connected to MCC08, the other end of 17Q2 is connected to MCC04, and the other end of 17Q1 is connected to MCC01.

[0010] As another preferred solution, the fire extinguisher and the safety trip control circuit of the present invention include a shunt trip coil MX. One end of MX is connected to 1L0 through a fuse, and the other end of MX is respectively connected to one end of the rear right emergency stop switch SB4 of SUB30, one end of the rear left emergency stop switch SB3 of SUB30, one end of the front right emergency stop switch SB2 of SUB30, one end of the front left emergency stop switch SB1 of SUB30, one end of the N1# LIMIT of the SUB30 transformer room door limit switch, one end of the N2# LIMIT of the SUB30 transformer room door limit switch, one end of the N3# FIRE of the SUB30 fire extinguisher linkage point switch, one end of the N4# FIRE of the SUB30 fire extinguisher linkage point switch, one end of the rear right emergency stop switch SB8 of SUB31, one end of the rear left emergency stop switch SB7 of SUB31, one end of the front right emergency stop switch SB6 of SUB31, one end of the front left emergency stop switch SB5 of SUB31, one end of the N7# LIMIT of the SUB31 transformer room door limit switch, one end of the N8# LIMIT of the SUB31 transformer room door limit switch, one end of the N9# LIMIT of the SUB31 transformer room door limit switch, one end of the N10# FIRE of the SUB31 fire extinguisher linkage point switch, and one end of the N11# FIRE of the SUB31 fire extinguisher linkage point switch;

[0011] The other end of the rear right emergency stop switch SB4 of SUB30, the other end of the rear left emergency stop switch SB3 of SUB30, the other end of the front right emergency stop switch SB2 of SUB30, the other end of the front left emergency stop switch SB1 of SUB30, the other end of the N1# LIMIT of the SUB30 transformer room door limit switch, the other end of the N2# LIMIT of the SUB30 transformer room door limit switch, the other end of the N3# FIRE of the SUB30 fire extinguisher linkage point switch, the other end of the N4# FIRE of the SUB30 fire extinguisher linkage point switch, the other end of the rear right emergency stop switch SB8 of SUB31, the other end of the rear left emergency stop switch SB7 of SUB31, the other end of the front right emergency stop switch SB6 of SUB31, the other end of the front left emergency stop switch SB5 of SUB31, the other end of the N7# LIMIT of the SUB31 transformer room door limit switch, the other end of the N8# LIMIT of the SUB31 transformer room door limit switch, the other end of the N9# LIMIT of the SUB31 transformer room door limit switch, the other end of the N10# FIRE of the SUB31 fire extinguisher linkage point switch, and the other end of the N11# FIRE of the SUB31 fire extinguisher linkage point switch are connected to one end of the ring main unit switch, and the other end of the ring main unit switch is connected to 1N0.

[0012] As another preferred solution, the transformer temperature control loop of the present invention includes a transformer thermostat 29DK. The 1st and 2nd pins of 29DK are respectively connected to 1L20.2 and 1L20.1 correspondingly. The 3rd to 5th pins of 29DK are respectively connected to the L terminals of fans fan1 to fan3 correspondingly. The 6th pin of 29DK is connected to the N terminals of fan1 to fan3, and the 6th pin of 29DK is also connected to the N terminals of fans fan4 to fan6. The 8th to 10th pins of 29DK are respectively connected to the L terminals of fans fan4 to fan6 correspondingly. The 15th pin of 29DK is connected to 1L20.1, and the 16th pin of 29DK is connected to 1L20.2 through the control terminal of relay 29KA1.

[0013] As another preferred solution, the transformer thermostat (10) of the present invention adopts a LD-B10-10 type thermostat.

[0014] As another preferred solution, the electric energy monitoring part of the present invention includes a multifunctional power meter 11P1. The 35th pin of 11P1 is respectively connected to 1N0 and the 13th pin of 11P1 through the control terminal of relay 11KA1. The 34th pin of 11P1 is respectively connected to 1L0 and one end of fuse 11Q3, and the other end of 11Q3 is connected to the 12th pin of 11P1; the 11th pin of 11P1 is grounded;

[0015] The 5th to 6th pins of 11P1 are connected to the output ports of the three-phase current transformer. The 1st to 4th pins of 11P1 are connected to the three-phase power through fuse 11Q1, and the three-phase power is grounded through contactor 11Q2 and surge protector 11PRD in sequence.

[0016] As another preferred solution, the multifunctional power meter of the present invention adopts an APMD type power meter.

[0017] As another preferred solution, the protection control loop of the present invention includes a safety relay (assembly label number 8) 27KAU. The A1 and A2 ports of 27KAU are respectively connected to 15L04 and 15N04 correspondingly. The 13th pin of 27KAU is connected to 1L0, the 23rd pin of 27KAU is connected to SUB31. The S11 port of 27KAU is connected to the S12 port of 27KAU through six emergency stop buttons in sequence. The S21 port of 27KAU is connected to the S22 port of 27KAU through an emergency stop button;

[0018] The S24 port of 27KAU is connected to SUB31. The 14th pin of 27KAU is connected to 18-1. The Y36 and Y37 ports of 27KAU are connected. The S34 port of 27KAU is connected to the S33 port of 27KAU through switch 27SB1.

[0019] As another preferred solution, the safety relay of the present invention adopts a PILZ type relay.

[0020] As another preferred solution, the leakage protection module of the present invention includes residual current detectors 25GF and 26GF. The L and N ports of 25GF are respectively connected to 1L0 and 1N0 correspondingly. The J1 port of 25GF is connected to 1L0 through the control terminal of relay 25K1. The J2 port of 25GF is connected to 1L0 through the control terminal of relay 25K2. The COM port of 25GF is connected to 1N0. The J3 port of 25GF is connected to 1L0 through the control terminal of relay 25K3. The J4 port of 25GF is connected to 1L0 through the control terminal of relay 25K4. The COM port of 25GF is connected to 1N0;

[0021] The I1, I2, I3, and I4 ports of 25GF are respectively connected to the CM1 port of 25GF through residual current transformer probes 13T1, 13T2, 13T3, and 13T4;

[0022] The L and N ports of 26GF are respectively connected to 1L0 and 1N0 correspondingly. The J1 port of 26GF is connected to 1L0 through the control terminal of relay 26K1. The J2 port of 26GF is connected to 1L0 through the control terminal of relay 26K2. The COM port of 26GF is connected to 1N0. The J3 port of 26GF is connected to 1L0 through the control terminal of relay 26K3. The COM port of 26GF is connected to 1N0;

[0023] The I1, I2, and I3 ports of 26GF are respectively connected to the CM1 port of 26GF through residual current transformer probes 15T1, 17T1, and 17T2;

[0024] 1L0 is successively connected to one end of the controlled normally open switch of safety relay 27KAU and one end of the controlled normally closed switch of transformer overtemperature protection relay 29KA1, and then respectively connected to one end of the controlled normally closed switch of protection relay 11KA1, one end of the controlled normally closed switch of relay 14KA1, and one end of the controlled normally closed switch of relay 12KA1;

[0025] The other end of the controlled normally closed switch of 11KA1 is respectively connected to one end of the controlled normally closed switch of relay 25K1, one end of the controlled normally closed switch of relay 25K2, one end of the controlled normally closed switch of relay 25K3, and one end of the controlled normally closed switch of relay 25K4. The other end of the controlled normally closed switch of 25K1 is respectively connected to one end of 13UV1 and one end of indicator light 18D1. The other end of 13UV1 is respectively connected to the other end of 18D1 and 1N0;

[0026] The other end of the controlled normally closed switch of 25K2 is respectively connected to one end of 13UV2 and one end of indicator light 18D2. The other end of 13UV2 is respectively connected to the other end of 18D2 and 1N0;

[0027] The other end of the 25K3 controlled normally closed switch is respectively connected to one end of 13UV3 and one end of the indicator light 18D3. The other end of 13UV3 is respectively connected to the other end of 18D3 and 1N0.

[0028] The other end of the 25K4 controlled normally closed switch is respectively connected to one end of 13UV4 and one end of the indicator light 18D4. The other end of 13UV4 is respectively connected to the other end of 18D4 and 1N0.

[0029] The other end of the controlled normally closed switch of 14KA1 is respectively connected to one end of 15UV7 and one end of the indicator light 18D5 through the controlled normally closed switch of the relay 26K1. The other end of 15UV7 is respectively connected to 1N0 and the other end of 18D5.

[0030] The other end of the controlled normally closed switch of 12KA1 is respectively connected to 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 to one end of 17UV1 and one end of the indicator light 18D6. The other end of 17UV1 is respectively connected to 1N0 and the other end of 18D6.

[0031] The other end of the controlled normally closed switch of 26K3 is respectively connected to one end of 17UV2 and one end of the indicator light 18D7. The other end of 17UV2 is respectively connected to 1N0 and the other end of 18D7.

[0032] As another preferred solution, the residual current detector described in the present invention adopts an ARCM type detector.

[0033] Secondly, the remote I / O module of the present invention includes a switching power supply 31U1. The input ends of 31U1 are respectively connected to 1L0 and 1N0. The output end of 31U1 is connected to the power supply end of the CONTROLNET SINGLE MEDIA ADAPTOR MODULE.

[0034] The 0 port of 31A3 is connected to the AO port of the transformer temperature controller 29DK. The 17 port of 31A3 is respectively connected to the 19 port of 31A3, the 21 port of 31A3, and the COM port of 29DK. The BO port of 29DK is connected to the 2 port of 31A3. The CO port of 29DK is connected to the 4 port of 31A3.

[0035] The 0 port of 31A4 is connected to the AO port of the transformer temperature controller 46DK. The 17 port of 31A4 is respectively connected to the 19 port of 31A4, the 21 port of 31A4, and the COM port of 46DK. The BO port of 46DK is connected to the 2 port of 31A4. The CO port of 46DK is connected to the 4 port of 31A4.

[0036] The AO port of the 6-port connection transformer temperature controller 47DK is connected to the 31A4 port 31, and the 23 port of 31A4 is respectively connected to the 25 port of 31A4, the 27 port of 31A4, and the COM port of 47DK. The BO port of 47DK is connected to the 8 port of 31A4, and the CO port of 47DK is connected to the 10 port of 31A4;

[0037] The 0 port of 31A1 is connected to the 17Q1-SED (CBM01) switch, the 17 port of 31A1 is connected to the 26K2 MCC01 Groundfault trip switch, the 1 port of 31A1 is connected to the 05Q1-SDE (CBM02Y) switch, the 18 port of 31A1 is connected to the 48KA1 48KA2 Ground fault trip switch, the 2 port of 31A1 is connected to the 05Q2-SDE (CBM02D) switch, the 19 port of 31A1 is connected to the 05Q3-SDE (CBM03Y) switch, the 3 port of 31A1 is connected to the 05Q4-SDE (CBM03D) switch, the 20 port of 31A1 is connected to the 26K3 MCC04 Ground fault trip switch, the 4 port of 31A1 is connected to the 17Q2-SDE (CBM04) switch, the 21 port of 31A1 is connected to the 25K1 MCC05 Ground fault trip switch, the 22 port of 31A1 is connected to the 25K3 MCC09 Ground fault trip switch, the 6 port of 31A1 is connected to the 16Q3-SDE(CBM07) switch, the 23 port of 31A1 is connected to the 25K4 MCC08 Ground fault trip switch, the 7 port of 31A1 is connected to the 16Q4-SDE(CBM08) switch, and the 24 port of 31A1 is connected to the 25K2 PDE11 Ground fault trip switch;

[0038] The 0 port of 31A2 is connected to the 20Q1-SDE (CBM50-01) switch, the 17 port of 31A2 is connected to the 24Q3-SDE (CBM50-18) switch, the 1 port of 31A2 is connected to the 21Q1-SDE (CBM50-02) switch, the 18 port of 31A2 is connected to the 24Q4-SDE (CBM50-19) switch, the 2 port of 31A2 is connected to the 21Q2-SDE (CBM50-03) switch, the 19 port of 31A2 is connected to the 24Q5-SDE (CBM50-20) switch, the 3 port of 31A2 is connected to the 21Q3-SDE (CBM50-04) switch, the 4 port of 31A2 is connected to the 21Q4-SDE (CBM50-05) switch, the 5 port of 31A2 is connected to the 22Q1-SDE(CBM50-07) switch, the 6 port of 31A2 is connected to the 22Q2 (CBM50-08) switch, and the 7 port of 31A2 is connected to the CBM50-09-SDE switch.

[0039] In addition, the transformer temperature controller described in the present invention uses an LD-B10-10 type temperature controller.

[0040] Advantages of the present invention.

[0041] Through the coordinated use of the primary system part, fire extinguisher and safety trip control circuit, transformer temperature control circuit, power monitoring part, protection control circuit, leakage protection module and remote I / O module, the present invention facilitates reliable and efficient control of the box-type substation. Brief description of the drawings

[0042] The following further describes the present invention in conjunction with the drawings and specific embodiments. The protection scope of the present invention is not limited to the description of the following content.

[0043] Figure 1 This is the primary system diagram of the present invention.

[0044] Figure 2 This is the fire extinguisher control circuit and safety trip control circuit, where MX is the shunt trip coil, SB1-8 are emergency stop buttons, N1-2,7-9LIMIT are threshold switches, and N3-4,10-11FIRE are fire extinguisher interlock contacts. When a fire or other emergency occurs, the corresponding contacts close and the shunt trip coil operates to disconnect the incoming line cabinet.

[0045] Figure 3It is a temperature monitoring and control circuit for a transformer. Here, 29DK is the transformer temperature controller. The 1-2 contacts are the control power supply of the temperature controller, the 3-10 are the fan interfaces, the 13-14 are the alarm interfaces, the 15-16 are the trip interfaces, and the 19-22 are the analog interfaces. When the transformer temperature exceeds the set value, the 15-16 points close, the 29KA1 relay operates, cutting off all low-voltage circuit breakers and transmitting the signal to the background.

[0046] Figure 4 It is an electric energy monitoring system. Here, 11P1 is a multifunction meter. The 1-4 are the sampled voltages, the 5-10 are the sampled currents, the 11-13 are the controller power supply, and the 34-35 are the relay output points. In addition to displaying electric energy parameters, this multifunction meter (11) also has functions of undervoltage, overvoltage, and phase sequence monitoring and protection. When a certain electric energy parameter exceeds the set value, the 34-35 points close, the 11KA1 relay operates, cutting off all low-voltage circuit breakers and transmitting the signal to the background.

[0047] Figure 5 It is a safety protection control circuit. Here, 27KAU is a safety relay. A1-A2 are the relay power supply, the 13-14 and 23-24 are the relay output interfaces, S11-S12, S21-S22 are the relay forced output interfaces, and S33-S34 are the relay fault reset interfaces. When a fault occurs in the control circuit, the 13-14 and 23-24 contacts close, cutting off all low-voltage circuit breakers. After the fault is eliminated, the safety relay needs to be manually restored.

[0048] Figure 6 、 Figure 7 、 Figure 8 It is a leakage protection control circuit. Here, 25GF is a residual current detector that can monitor 4 circuits. The 12-13 are the power supply, the 34-41 are the relay output interfaces, and the 1-5 are the residual current transformer interfaces. Each low-voltage molded case circuit breaker is equipped with a residual current transformer, and a loss-of-voltage coil is installed inside the molded case. When a leakage occurs in a certain circuit breaker, the leakage signal is transmitted to the controller through the residual current transformer, and at the same time the corresponding relay operates, cutting off the corresponding molded case circuit breaker.

[0049] Figures 9 to 13 It is a remote I / O module. According to the actual requirements of on-site equipment, 2 groups of 32-bit I / O modules (31A3-4) are selected to transmit the molded case circuit breakers, miniature circuit breakers, leakage alarm signals, transformer temperature alarm signals, etc. inside the box-type substation to the background. Since there are 3 groups of transformers in the 8-meter shield that need to collect temperature signals, 2 groups of analog modules (31A1-2) are equipped. Each module can collect 2 groups of analog signals, and at the same time an Ethernet interface (31A0) is equipped to facilitate communication with the background.

[0050] Figure 14 This is a schematic diagram of the rear box structure of the present invention.

[0051] Figure 15 This is a schematic diagram of the front box structure of the present invention.

[0052] Figure 16 This is a bottom-up view of the fan cover of the present invention.

[0053] Figure 17 This is a top view of the bottom of the box of the present invention.

[0054] Figure 18 This is a top view of the rear box of the present invention.

[0055] Figure 19 This is a top view of the front box of the present invention.

[0056] Figure 20 This is a front view of the rear box of the present invention.

[0057] Figure 21 This is a front view of the front box of the present invention.

[0058] Figure 22 This is a rear view of the rear box of the present invention.

[0059] Figure 23 This is a rear view of the front box of the present invention. Detailed implementation manners

[0060] As shown in the figure, the prefabricated substation control circuit of the present invention can be applied to a prefabricated substation. The prefabricated substation includes a box body and a control circuit. A high-voltage chamber (102), a transformer chamber, and a control room 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-voltage chamber (102);

[0061] The control circuit includes 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, a leakage protection module, and a remote I / O module. The power supply ports of the fire extinguisher and safety trip control loop are respectively connected to the power supply ports of the electric energy monitoring part, the protection control loop, the leakage protection module, and the remote I / O module. The feedback signal output port of the primary system part is connected to the feedback signal input port of the remote I / O module. The control signal output port of the transformer temperature control loop is connected to the control signal input port of the leakage protection module. The control signal output port of the electric energy monitoring part is connected to the control signal input port of the leakage protection module. The control signal output port of the protection control loop is connected to the control signal input port of the fire extinguisher and safety trip control loop. The feedback signal output port of the leakage protection module is connected to the feedback signal input port of the remote I / O module.

[0062] In the prefabricated box-type substation of the present invention, the transformer is divided into three groups and placed in two box-type substations. At the same time, the control room and the high-voltage room are reasonably arranged to meet the requirements of equipment capacity and usage space.

[0063] There are two boxes, and the two boxes are arranged horizontally. In the front box, a first control room (103), a first transformer room (104), and a second transformer room (105) are arranged in sequence from front to back. In the rear box, a second control room (100), a third transformer room (101), and a high-voltage room (102) are arranged in sequence from front to back.

[0064] The first control room (103) is divided into two intervals from front to back, and double-leaf doors are arranged at the front end of each interval; three groups of double-leaf doors are arranged at the front end of the first transformer room (104) and the second transformer room (105) from front to back respectively;

[0065] The second control room (100) is divided into three interval areas from front to back, double-leaf doors are arranged at the front end of each interval, and a plurality of mounting holes (3) are evenly distributed along the vertical direction on both sides of each interval area;

[0066] Three groups of double-leaf doors are arranged at the front end of the third transformer room (101) from front to back; double-leaf doors are arranged at the front end of the high-voltage room (102).

[0067] Ventilation openings (51) are arranged at the bottom (10) of the box, fans (5) are arranged on both sides of the box, a semi-U-shaped fan cover is covered outside the fan, the opening of the fan cover faces downward, a dust-proof sponge (50) is arranged inside the fan cover, and a mesh plate is arranged at the opening of the fan cover.

[0068] The mesh size of the mesh plate is 10mm×10mm.

[0069] Fire extinguishers (6) are arranged in the first control room (103), the second control room (100), and the third transformer room (101).

[0070] The fire extinguishers adopt ultra-fine dry powder automatic fire extinguishing devices. The fire signal output port of the ultra-fine dry powder automatic fire extinguishing device is connected to the control port of the incoming line load switch, and the incoming line load switch is connected to the incoming line end of the ring main unit (2).

[0071] The transformers in the first transformer room (104), the second transformer room (105), and the third transformer room (101) are all 2000KVA dry-type transformers.

[0072] The box adopts 8KD type open steel.

[0073] Limit switches for detecting the opening and closing of the box door are arranged on the box. The detection signal output port of the limit switch is connected to the control port of the incoming line load switch, and the incoming line load switch is connected to the incoming line end of the ring main unit (2).

[0074] The diameter of the installation hole (3) is 9.2 mm, and the spacing between adjacent installation holes (3) is 20 mm.

[0075] A device installation beam (20) is provided in the second control room (100), and a guide rail (21) is installed on the installation beam (20).

[0076] The residual current controller 7, safety relay 8, I / O module 9, molded case circuit breaker 12, miniature circuit breaker 13, residual current detector 14, intermediate relay 15, switching power supply 16, terminal block 17, isolating switch fuse group 18, and dual power supply 19 are installed on the installation beam (20).

[0077] A cabinet door is provided at the front end of the cabinet, and a tempered glass display window (4) is provided on the cabinet door.

[0078] A transformer temperature detection part (22) and a heat dissipation device (23) are provided in the transformer room. The control signal input port of the heat dissipation device is connected to the control signal output port of the controller, and the signal transmission port of the controller is connected to the signal transmission port of the display control panel on the cabinet door.

[0079] Once it is found that the temperature exceeds the alarm limit, the power supply will be cut off and an alarm will be issued. The controller sends a control signal to the incoming line load switch, the load switch trips, and the alarm is given through the panel.

[0080] The transformer temperature detection part (22) uses a PT100 platinum resistance, and the PT100 platinum resistance is embedded in the dry-type transformer winding.

[0081] The heat dissipation device (23) uses six heat dissipation fans, and the heat dissipation fans are arranged on the transformer, three in the front and three in the back.

[0082] The controller uses an LD-B10-10 type controller.

[0083] The primary system part includes frame circuit breakers 05Q1 to 05Q4. One end of the lower-level power distribution box MCC02 (the primary circuit is a single-line diagram, and the two lines connected to MCC02 in the figure, each line represents 3 live wires) is respectively connected to a first voltmeter, a first ammeter, one end of a first transformer, and one end of frame circuit breaker 05Q3 through frame circuit breaker 05Q1. The other end of the lower-level power distribution box MCC02 is respectively connected to a second voltmeter, a second ammeter, one end of a second transformer, and one end of frame circuit breaker 05Q4 through frame circuit breaker 05Q2. The other end of frame circuit breaker 05Q3 is connected to one end of the lower-level power distribution box MCC03, and the other end of frame circuit breaker 05Q4 is connected to the other end of the lower-level power distribution box MCC03; 05Q1 to 05Q4 supply power to the lower-level power distribution box.

[0084] The other end of the first transformer is connected to one end of the main switch, one end of switch V2, and one end of switch V3 through switch V1 respectively. The other end of V2 is connected to the other end of the second transformer.

[0085] The other end of V3 is connected to one end of the third transformer. The second joint at the other end of the third transformer is respectively connected to one end of the fourth voltmeter, one end of the fourth ammeter, one end of the single-pole double-throw toggle end, one end of 13Q1, one end of 13Q2, one end of 13Q3, and one end of 13Q4. The first joint at the other end of the third transformer is respectively connected to the third voltmeter, the third ammeter, one end of the single-pole double-throw toggle end, one end of 13Q1, one end of 13Q2, one end of 13Q3, and one end of 13Q4.

[0086] The single-pole double-throw fixed end is respectively connected to the fifth voltmeter, the fifth ammeter, one end of the fuse, and one end of 15Q7. The other end of the fuse is connected to one end of the control transformer (24) (the control transformer (24) converts 380V voltage into 110V - 0V - 110V voltage and is used as the power supply for the control circuit). The other end of the control transformer (24) is respectively connected to one end of 15Q1, one end of 15Q2, and one end of 15Q3. The other end of 15Q1 is connected to PDE30, the other end of 15Q2 is connected to PDE31, the other end of 15Q3 is connected to PDE32, the other end of 15Q7 is connected to MCC10, the other end of 13Q1 is connected to MCC05, the other end of 13Q2 is connected to PDE11, the other end of 13Q3 is connected to MCC09, the other end of 13Q4 is connected to MCC08, the other end of 17Q2 is connected to MCC04, and the other end of 17Q1 is connected to MCC01.

[0087] 13Q1 - 13Q4, 15Q1 - 15Q3, 15Q7, 17Q2, and 17Q1 are molded case circuit breakers, which are used to provide power for the lower-level distribution boxes. PDE30 - PDE32, MCC10, MCC05, PDE11, MCC09, MCC08, MCC04, and MCC01 are lower-level distribution boxes.

[0088] In the figure, PDE30 is only connected to one line, and this line represents 3 live wires. The MCC02 box is a lower-level distribution box. Since the user needs 2 incoming lines, there are 2 lines, and each line has 3 live wires.

[0089] The 10KV power supply first arrives at the incoming line cabinet C. When the C cabinet is closed, the feeder cabinets V1 - V3 are powered on. When V1 - V3 are closed, the high-voltage sides of the corresponding three groups of transformers are powered on, and at the same time, the 10KV high voltage is converted into 0.4KV low voltage. The low-voltage sides of the transformers are connected to molded case circuit breakers and frame switches. These switches provide power for the lower-level distribution boxes. After any one of the switches is closed, the lower-level distribution boxes are powered on. The current and voltage of the transformers are monitored using power meters. In the figure, the control transformer converts the 0.4KV power supply into 110V - 0V - 110V to provide power for the power meters.

[0090] The fire extinguisher and safety trip control circuit includes a shunt trip coil MX (for controlling the shutdown of the incoming line load switch). One end of MX is connected to 1L0 through a fuse, and the other end of MX is respectively connected to one end of the rear right emergency stop switch SB4 of SUB30, one end of the rear left emergency stop switch SB3 of SUB30, one end of the front right emergency stop switch SB2 of SUB30, one end of the front left emergency stop switch SB1 of SUB30, one end of the N1# LIMIT of the SUB30 transformer room door limit switch, one end of the N2# LIMIT of the SUB30 transformer room door limit switch, one end of the N3# FIRE of the SUB30 fire extinguisher linkage point switch (a fuse is set on the fire extinguisher body, when a fire occurs, the fuse is ignited, and at this time the fire extinguisher linkage point operates to cut off the incoming line load switch), one end of the N4# FIRE of the SUB30 fire extinguisher linkage point switch, one end of the rear right emergency stop switch SB8 of SUB31, one end of the rear left emergency stop switch SB7 of SUB31, one end of the front right emergency stop switch SB6 of SUB31, one end of the front left emergency stop switch SB5 of SUB31, one end of the N7# LIMIT of the SUB31 transformer room door limit switch, one end of the N8# LIMIT of the SUB31 transformer room door limit switch, one end of the N9# LIMIT of the SUB31 transformer room door limit switch, one end of the N10# FIRE of the SUB31 fire extinguisher linkage point switch, and one end of the N11# FIRE of the SUB31 fire extinguisher linkage point switch;

[0091] The other end of the rear right emergency stop switch SB4 of SUB30, the other end of the rear left emergency stop switch SB3 of SUB30, the other end of the front right emergency stop switch SB2 of SUB30, the other end of the front left emergency stop switch SB1 of SUB30, the other end of the N1# LIMIT of the SUB30 transformer room door limit switch, the other end of the N2# LIMIT of the SUB30 transformer room door limit switch, the other end of the N3# FIRE of the SUB30 fire extinguisher linkage point switch, the other end of the N4# FIRE of the SUB30 fire extinguisher linkage point switch, the other end of the rear right emergency stop switch SB8 of SUB31, the other end of the rear left emergency stop switch SB7 of SUB31, the other end of the front right emergency stop switch SB6 of SUB31, the other end of the front left emergency stop switch SB5 of SUB31, the other end of the N7# LIMIT of the SUB31 transformer room door limit switch, the other end of the N8# LIMIT of the SUB31 transformer room door limit switch, the other end of the N9# LIMIT of the SUB31 transformer room door limit switch, the other end of the N10# FIRE of the SUB31 fire extinguisher linkage point switch, and the other end of the N11# FIRE of the SUB31 fire extinguisher linkage point switch are connected to one end of the ring main unit switch, and the other end of the ring main unit switch is connected to 1N0.

[0092] The front, back, left, and right indicate the positions of the emergency stop switches. In the panel diagram, 08SB1 to 08SB4 are the emergency stop buttons. Emergency stop switches are set at the four positions of front, back, left, and right. When a safety problem occurs on-site, the incoming line load disconnector can be cut off immediately to ensure the overall power-off of the box-type substation. That is, the emergency stop plays the role of cutting off the power supply and cutting off the power supply of the primary circuit. If a switch action is detected, MX controls the overall power-off of the incoming line load disconnector.

[0093] The transformer temperature control circuit includes a transformer temperature controller 29DK. The 1st and 2nd pins of 29DK are respectively connected to 1L20.2 and 1L20.1 correspondingly. The 3rd to 5th pins of 29DK are respectively connected to the L terminals of fans fan1 to fan3 (the assembly drawing label 23 is the cooling fan, installed on the transformer, 3 in front and back symmetrically, and can be connected to the power supply in any order, starting and stopping simultaneously). The 6th pin of 29DK is connected to the N terminals of fan1 to fan3. The 6th pin of 29DK is connected to the N terminals of fans fan4 to fan6 (the assembly drawing label 23 is the cooling fan, installed on the transformer, 3 in front and back symmetrically, and can be connected to the power supply in any order, starting and stopping simultaneously). The 8th to 10th pins of 29DK are respectively connected to the L terminals of fans fan4 to fan6. The 15th pin of 29DK is connected to 1L20.1. The 16th pin of 29DK is connected to 1L20.2 through the control terminal of relay 29KA1.

[0094] The transformer temperature controller (10) adopts an LD-B10-10 type temperature controller.

[0095] The power energy monitoring part includes a multi-functional power meter (panel diagram label 11) 11P1. The 35th pin of 11P1 is respectively connected to 1N0 and the 13th pin of 11P1 through the control terminal of relay 11KA1. The 34th pin of 11P1 is respectively connected to 1L0 and one end of fuse 11Q3. The other end of 11Q3 is connected to the 12th pin of 11P1. The 11th pin of 11P1 is grounded.

[0096] The 5th to 6th pins of 11P1 are connected to the output ports of the three-phase current transformers (detecting the current on the low-voltage side of the transformer). The 1st to 4th pins of 11P1 are connected to the three-phase power through fuse 11Q1. The three-phase power is successively grounded through contactor 11Q2 and surge protector 11PRD.

[0097] The multi-functional power meter adopts an APMD type power meter.

[0098] The protection control circuit includes a safety relay (assembly drawing label 8) 27KAU. The A1 and A2 ports of 27KAU are respectively connected to 15L04 and 15N04 (A1 and A2 are the power supplies of the safety relay, and 15L04 and 15N04 represent that a 110V power supply is connected to A1 and A2, actually transformed from the control transformer). The 13th pin of 27KAU is connected to 1L0, the 23rd pin of 27KAU is connected to SUB31 (the prefabricated box of the present invention becomes a product with 2 sets in one, one box is named SUB30, and the other is named SUB31). The S11 port of 27KAU is sequentially connected to the S12 port of 27KAU through six emergency stop buttons (used to cut off all low-voltage circuit breakers. These 6 emergency stops are not inside the box transformer and are reserved interfaces for the site). The S21 port of 27KAU is connected to the S22 port of 27KAU through an emergency stop button;

[0099] The S24 port of 27KAU is connected to SUB31. The 14th pin of 27KAU is connected to 18-1 (which is the signal to cut off all circuit breakers). The Y36 and Y37 ports of 27KAU are connected. The S34 port of 27KAU is connected to the S33 port of 27KAU through the switch 27SB1.

[0100] The safety relay adopts a PILZ-type relay.

[0101] The leakage protection module includes residual current detectors 25GF and 26GF. The L and N ports of 25GF are respectively connected to 1L0 and 1N0. The J1 port of 25GF is connected to 1L0 through the control terminal of the relay 25K1. The J2 port of 25GF is connected to 1L0 through the control terminal of the relay 25K2. The COM port of 25GF is connected to 1N0. The J3 port of 25GF is connected to 1L0 through the control terminal of the relay 25K3. The J4 port of 25GF is connected to 1L0 through the control terminal of the relay 25K4. The COM port of 25GF is connected to 1N0;

[0102] The I1, I2, I3, and I4 ports of 25GF are respectively connected to the CM1 port of 25GF through the residual current transformer probes 13T1, 13T2, 13T3, and 13T4;

[0103] The L and N ports of 26GF are respectively connected to 1L0 and 1N0. The J1 port of 26GF is connected to 1L0 through the control terminal of the relay 26K1. The J2 port of 26GF is connected to 1L0 through the control terminal of the relay 26K2. The COM port of 26GF is connected to 1N0. The J3 port of 26GF is connected to 1L0 through the control terminal of the relay 26K3. The COM port of 26GF is connected to 1N0;

[0104] The I1, I2, and I3 ports of 26GF are respectively connected to the CM1 port of 26GF through the residual current transformer probes 15T1, 17T1, and 17T2;

[0105] 1L0 is successively connected to one end of the controlled normally - open switch of the safety relay 27KAU and one end of the controlled normally - closed switches of the transformer overtemperature protection relay 29KA1, the controlled normally - closed switch of the protection relay 11KA1, the controlled normally - closed switch of the relay 14KA1, and the controlled normally - closed switch of the relay 12KA1 respectively;

[0106] The other end of the controlled normally - closed switch of 11KA1 is respectively connected to one end of the controlled normally - closed switches of the relays 25K1, 25K2, 25K3, and 25K4. The other end of the controlled normally - closed switch of 25K1 is respectively connected to one end of 13UV1 and one end of the indicator light 18D1. The other end of 13UV1 is respectively connected to the other end of 18D1 and 1N0;

[0107] The other end of the controlled normally - closed switch of 25K2 is respectively connected to one end of 13UV2 and one end of the indicator light 18D2. The other end of 13UV2 is respectively connected to the other end of 18D2 and 1N0;

[0108] The other end of the controlled normally - closed switch of 25K3 is respectively connected to one end of 13UV3 and one end of the indicator light 18D3. The other end of 13UV3 is respectively connected to the other end of 18D3 and 1N0;

[0109] The other end of the controlled normally - closed switch of 25K4 is respectively connected to one end of 13UV4 and one end of the indicator light 18D4. The other end of 13UV4 is respectively connected to the other end of 18D4 and 1N0;

[0110] The other end of the controlled normally - closed switch of 14KA1 is respectively connected to one end of 15UV7 and one end of the indicator light 18D5 through the controlled normally - closed switch of the relay 26K1. The other end of 15UV7 is respectively connected to 1N0 and the other end of 18D5;

[0111] The other end of the controlled normally - closed switch of 12KA1 is respectively connected to one end of the controlled normally - closed switches of the relays 26K2 and 26K3. The other end of the controlled normally - closed switch of 26K2 is respectively connected to one end of 17UV1 and one end of the indicator light 18D6. The other end of 17UV1 is respectively connected to 1N0 and the other end of 18D6;

[0112] The other end of the controlled normally - closed switch of 26K3 is respectively connected to one end of 17UV2 and one end of the indicator light 18D7. The other end of 17UV2 is respectively connected to 1N0 and the other end of 18D7.

[0113] 13UV1, 13UV2, 13UV3, 13UV4, 15UV7, 17UV1, and 17UV2 are under-voltage coils that respectively control circuit breakers 15Q1 to 15Q4, 15Q7, 17Q1, and 17Q2. When the primary circuit voltage is too low, the under-voltage coil operates and the corresponding circuit breaker opens.

[0114] 26GF is used to control 26K1, 26K2, and 26K3, and has the same usage as 25K1 to 25K3.

[0115] The residual current detector uses an ARCM type detector.

[0116] The remote I / O module includes a switching power supply 31U1 (converting AC 110V to DC 24V). The input terminals of 31U1 are respectively connected to 1L0 and 1N0, and the output terminal of 31U1 is connected to the power supply terminal of the CONTROLNET SINGLE MEDIA ADAPTOR MODULE (network adapter 1794-ACN15);

[0117] Port 0 of 31A3 is connected to the AO port of the transformer temperature controller 29DK. Port 17 of 31A3 is respectively connected to port 19 of 31A3, port 21 of 31A3, and the COM port of 29DK. The BO port of 29DK is connected to port 2 of 31A3, and the CO port of 29DK is connected to port 4 of 31A3;

[0118] Port 0 of 31A4 is connected to the AO port of the transformer temperature controller 46DK. Port 17 of 31A4 is respectively connected to port 19 of 31A4, port 21 of 31A4, and the COM port of 46DK. The BO port of 46DK is connected to port 2 of 31A4, and the CO port of 46DK is connected to port 4 of 31A4;

[0119] Port 6 of 31A4 is connected to the AO port of the transformer temperature controller 47DK. Port 23 of 31A4 is respectively connected to port 25 of 31A4, port 27 of 31A4, and the COM port of 47DK. The BO port of 47DK is connected to port 8 of 31A4, and the CO port of 47DK is connected to port 10 of 31A4;

[0120] Port 0 of 31A1 is connected to the 17Q1-SED (CBM01) switch, port 17 of 31A1 is connected to the 26K2 MCC01 Groundfault trip switch, port 1 of 31A1 is connected to the 05Q1-SDE (CBM02Y) switch, port 18 of 31A1 is connected to the 48KA1 48KA2 Ground fault trip switch, port 2 of 31A1 is connected to the 05Q2-SDE (CBM02D) switch, port 19 of 31A1 is connected to the 05Q3-SDE (CBM03Y) switch, port 3 of 31A1 is connected to the 05Q4-SDE (CBM03D) switch, port 20 of 31A1 is connected to the 26K3 MCC04 Ground fault trip switch, port 4 of 31A1 is connected to the 17Q2-SDE (CBM04) switch, port 21 of 31A1 is connected to the 25K1 MCC05 Ground fault trip switch, port 22 of 31A1 is connected to the 25K3 MCC09 Ground fault trip switch, port 6 of 31A1 is connected to the 16Q3-SDE(CBM07) switch, port 23 of 31A1 is connected to the 25K4 MCC08 Ground fault trip switch, port 7 of 31A1 is connected to the 16Q4-SDE(CBM08) switch, port 24 of 31A1 is connected to the 25K2 PDE11 Ground fault trip switch;

[0121] Port 0 of 31A2 is connected to the 20Q1-SDE (CBM50-01) switch, port 17 of 31A2 is connected to the 24Q3-SDE (CBM50-18) switch, port 1 of 31A2 is connected to the 21Q1-SDE (CBM50-02) switch, port 18 of 31A2 is connected to the 24Q4-SDE (CBM50-19) switch, port 2 of 31A2 is connected to the 21Q2-SDE (CBM50-03) switch, port 19 of 31A2 is connected to the 24Q5-SDE (CBM50-20) switch, port 3 of 31A2 is connected to the 21Q3-SDE (CBM50-04) switch, port 4 of 31A2 is connected to the 21Q4-SDE (CBM50-05) switch, port 5 of 31A2 is connected to the 22Q1-SDE(CBM50-07) switch, port 6 of 31A2 is connected to the 22Q2 (CBM50-08) switch, port 7 of 31A2 is connected to the CBM50-09-SDE switch.

[0122] The transformer temperature controller adopts the LD-B10-10 type temperature controller.

[0123] The switches connected to 31A1 and 31A2 are used for signal feedback.

[0124] 31A0, 31A1, 31A2, 31A3, and 31A4 all belong to PLC acquisition devices. Among them, 31A0 is a network adapter 1794 - ACN15 used as a communication module, 31A1 and 31A2 are digital input modules 1756 - IB32, and 31A3 and 31A4 are analog input modules 1756 - IE16.

[0125] The present invention is applicable to an 8 - meter shield machine and is a pre - assembled box - type substation with a transformer capacity reaching 6000 KVA.

[0126] The height and depth of the box - type substation can be within H*D = 2200mm * 2000mm. The box - type substation has functions such as being convenient for installation and disassembly, ventilation and anti - corrosion, transformer temperature monitoring, electrical monitoring, fire alarm and extinguishing.

[0127] Under the condition of meeting the equipment capacity, the present invention divides a 6000 - KVA transformer into three groups of 2000 - KVA transformers and places them in two box - type substations (1). While meeting the equipment capacity, it occupies less space.

[0128] The incoming line of the present invention adopts a ring - main unit (2). The framework can use 8KD - type open - section steel. The two sides of the steel section have mounting holes with a modulus of 20mm and φ9.2 (3). Components are installed on the mounting beam, and the mounting beam is equipped with a guide rail, which is convenient for the installation, disassembly, and maintenance of components. The overall assembly ability is strong, and the front panel has a display, a toughened glass display window (4).

[0129] For the ventilation design, ventilation openings (51) are punched at the bottom of the box - type substation, and fans are added on both sides of the box - type substation for forced ventilation. The outside uses a semi - U - shaped structure to cover the fans, and a sponge body is placed inside. The lower opening is installed with a mesh plate, and this structure has the effect of preventing rain and dust.

[0130] The overall box body can be sprayed with white paint with high gloss, RAL9010 pure white or a similar color. The metal surface is clean and has strong anti - corrosion properties.

[0131] The present invention selects an ultra - fine dry - powder automatic fire - extinguishing device (6). The fire extinguisher is placed inside each unit. The top of the fire extinguisher has a fuse and a pair of normally open contacts. Once a fire occurs, the fire extinguisher is opened through the fuse for fire extinguishing. At the same time, the normally open point of the fire extinguisher closes and sends a signal to the shunt trip coil of the incoming line load switch, immediately cutting off the high - voltage part to minimize the loss.

[0132] The box - type substation is divided into a high - voltage chamber (102), a transformer chamber, and a control system unit. All units must be placed separately from each other, that is, in an ideal state, each has its own area.

[0133] A set of ring main units is adopted in the high-voltage compartment (102). The incoming line cabinet is internally equipped with a shunt release coil, which is connected to the limit switches on the cabinet doors of the transformer compartment and the low-voltage compartment. Once someone opens the cabinet door of the transformer compartment or the safety baffle, the high-voltage part will immediately trip and cut off, and at the same time, emergency stop buttons are set around the box-type substation to cut off the high-voltage part at any time. As Figure 12 shown.

[0134] A dry-type transformer is installed in the transformer compartment. When the equipment is running, it will generate relatively high heat. The temperature of the transformer is monitored in real time, and the heat dissipation equipment reduces the temperature of the transformer. A transformer temperature controller is adopted. The controller is externally connected to 6 radiators to reduce the temperature of the transformer. The temperature of the transformer is monitored in real time through a serial port cable, and the temperatures of the three phases of the transformer are displayed on the panel. The high-temperature and ultra-high-temperature alarm limits can be set on the controller. Once the temperature is found to exceed the alarm limit, the power supply will be cut off and an alarm will be issued. As Figure 13 shown.

[0135] The control system unit is internally equipped with leakage, power display monitoring, and safety protection modules.

[0136] The electric energy display monitoring uses a multifunctional meter, which mainly detects the output end of the transformer and displays three-phase current, voltage, active power, reactive power, electroplating, harmonics, etc. In addition, the multifunctional meter has protection functions such as under-voltage, over-voltage, and phase sequence monitoring. As Figure 14 shown.

[0137] The safety protection module selects a safety relay. When a fault occurs in the electrical circuit, all low-voltage circuit breakers will immediately trip and cannot be reclosed until the fault is eliminated, avoiding further equipment damage. As Figure 15 shown.

[0138] The leakage protection module combines a residual current controller and a current transformer. Once the wire passing through the current transformer leaks electricity, the corresponding relay will immediately act to cut off the main power supply of the circuit. At the same time, the magnitude of the leakage current value is displayed on the module, and an alarm is issued. As Figure 17 shown.

[0139] The remote I / O module transmits the states of various switches, fault locations, and power quality in the box-type substation to the background through communication, reducing personnel management and also reducing maintenance time. As Figure 18 shown.

[0140] It can be understood that the above specific description of the present invention is only for explaining the present invention and is not limited to the technical solutions described in the embodiments of the present invention. Those of ordinary skill in the art should understand that the present invention can still be modified or equivalently replaced to achieve the same technical effects; as long as it meets the use requirements, it is within the protection scope of the present invention.

Claims

1. A prefabricated substation control circuit, comprising a primary system part, a fire extinguisher and a safety trip control circuit, a transformer temperature control circuit, an electric energy monitoring part, a protection control circuit, a leakage protection module and a remote I / O module. The power supply ports of the fire extinguisher and the safety trip control circuit are respectively connected to the power supply ports of the electric energy monitoring part, the protection control circuit, the leakage protection module and the remote I / O module. The feedback signal output port of the primary system part is connected to the feedback signal input port of the remote I / O module. The control signal output port of the transformer temperature control circuit is connected to the control signal input port of the leakage protection module. The control signal output port of the electric energy monitoring part is connected to the control signal input port of the leakage protection module. The control signal output port of the protection control circuit is connected to the control signal input port of the fire extinguisher and the safety trip control circuit. The feedback signal output port of the leakage protection module is connected to the feedback signal input port of the remote I / O module; The primary system part includes frame circuit breakers 05Q1 to 05Q4. One end of the lower-level distribution box MCC02 is respectively connected to a first voltmeter, a first ammeter, one end of a first transformer, and one end of frame circuit breaker 05Q3 through frame circuit breaker 05Q1. The other end of the lower-level distribution box MCC02 is respectively connected to a second voltmeter, a second ammeter, one end of a second transformer, and one end of frame circuit breaker 05Q4 through frame circuit breaker 05Q2. The other end of frame circuit breaker 05Q3 is connected to one end of the lower-level distribution box MCC03, and the other end of frame circuit breaker 05Q4 is connected to the other end of the lower-level distribution box MCC03; The other end of the first transformer is respectively connected to one end of a main switch, one end of switch V2, and one end of switch V3 through switch V1. The other end of V2 is connected to the other end of the second transformer; The other end of V3 is connected to one end of a third transformer. The second connector at the other end of the third transformer is respectively connected to a fourth voltmeter, a fourth ammeter, one end of 17Q1, and one end of 17Q2. The first connector at the other end of the third transformer is respectively connected to a third voltmeter, a third ammeter, one end of a single-pole double-throw toggle end, one end of 13Q1, one end of 13Q2, one end of 13Q3, and one end of 13Q4; The single-pole double-throw fixed end is respectively connected to a fifth voltmeter, a fifth ammeter, one end of a fuse, and one end of 15Q7. The other end of the fuse is connected to one end of a control transformer (24). The other end of the control transformer (24) is respectively connected to one end of 15Q1, one end of 15Q2, and one end of 15Q3. The other end of 15Q1 is connected to PDE30, the other end of 15Q2 is connected to PDE31, the other end of 15Q3 is connected to PDE32, the other end of 15Q7 is connected to MCC10, the other end of 13Q1 is connected to MCC05, the other end of 13Q2 is connected to PDE11, the other end of 13Q3 is connected to MCC09, the other end of 13Q4 is connected to MCC08, the other end of 17Q2 is connected to MCC04, and the other end of 17Q1 is connected to MCC01; The transformer temperature control circuit includes a transformer thermostat 29DK. The 1st and 2nd pins of 29DK are respectively connected to 1L20.2 and 1L20.1 correspondingly. The 3rd to 5th pins of 29DK are respectively connected to the L terminals of fans fan1 to fan3 correspondingly. The 6th pin of 29DK is connected to the N terminals of fan1 to fan3, and the 6th pin of 29DK is also connected to the N terminals of fans fan4 to fan6. The 8th to 10th pins of 29DK are respectively connected to the L terminals of fans fan4 to fan6 correspondingly. The 15th pin of 29DK is connected to 1L20.1, and the 16th pin of 29DK is connected to 1L20.2 through the control terminal of relay 29KA1.

2. The prefabricated substation control circuit according to claim 1, characterized in that the fire extinguisher and safety trip control circuit includes a shunt trip coil MX. One end of MX is connected to 1L0 through a fuse, and the other end of MX is respectively connected to one end of the rear right emergency stop switch SB4 of SUB30, one end of the rear left emergency stop switch SB3 of SUB30, one end of the front right emergency stop switch SB2 of SUB30, one end of the front left emergency stop switch SB1 of SUB30, one end of the N1# LIMIT of the SUB30 transformer room door limit switch, one end of the N2# LIMIT of the N2# SUB30 transformer room door limit switch, one end of the N3# FIRE of the N3# SUB30 fire extinguisher linkage point switch, one end of the N4# FIRE of the N4# SUB30 fire extinguisher linkage point switch, one end of the rear right emergency stop switch SB8 of SUB31, one end of the rear left emergency stop switch SB7 of SUB31, one end of the front right emergency stop switch SB6 of SUB31, one end of the front left emergency stop switch SB5 of SUB31, one end of the N7# LIMIT of the N7# SUB31 transformer room door limit switch, one end of the N8# LIMIT of the N8# SUB31 transformer room door limit switch, one end of the N9# LIMIT of the N9# SUB31 transformer room door limit switch, one end of the N10# FIRE of the N10# SUB31 fire extinguisher linkage point switch, and one end of the N11# FIRE of the N11# SUB31 fire extinguisher linkage point switch; The other end of the rear right emergency stop switch SB4 of SUB30, the other end of the rear left emergency stop switch SB3 of SUB30, the other end of the front right emergency stop switch SB2 of SUB30, the other end of the front left emergency stop switch SB1 of SUB30, the other end of the N1# limit switch for the door of the SUB30 transformer room N1# LIMIT, the other end of the N2# limit switch for the door of the SUB30 transformer room N2# LIMIT, the other end of the N3# fire extinguisher linkage point switch N3# FIRE of SUB30, the other end of the N4# fire extinguisher linkage point switch N4# FIRE of SUB30, the other end of the rear right emergency stop switch SB8 of SUB31, the other end of the rear left emergency stop switch SB7 of SUB31, the other end of the front right emergency stop switch SB6 of SUB31, the other end of the front left emergency stop switch SB5 of SUB31, the other end of the N7# limit switch for the door of the SUB31 transformer room N7# LIMIT, the other end of the N8# limit switch for the door of the SUB31 transformer room N8# LIMIT, the other end of the N9# limit switch for the door of the SUB31 transformer room N9# LIMIT, the other end of the N10# fire extinguisher linkage point switch N10# FIRE of SUB31, the other end of the N11# fire extinguisher linkage point switch N11# FIRE of SUB31 are connected to one end of the ring main unit switch, and the other end of the ring main unit switch is connected to 1N0.

3. The prefabricated box-type substation control circuit according to claim 1, characterized in that the transformer temperature controller adopts an LD-B10-10 type temperature controller.

4. The prefabricated box-type substation control circuit according to claim 1, characterized in that the electric energy monitoring part includes a multi-functional power meter 11P1. The 35th pin of 11P1 is respectively connected to 1N0 and the 13th pin of 11P1 through the control terminal of the relay 11KA1. The 34th pin of 11P1 is respectively connected to 1L0 and one end of the fuse 11Q3, and the other end of 11Q3 is connected to the 12th pin of 11P1; the 11th pin of 11P1 is grounded; the 5th to 6th pins of 11P1 are connected to the output ports of the three-phase current transformer. The 1st to 4th pins of 11P1 are connected to the three-phase power through the fuse 11Q1, and the three-phase power is grounded through the contactor 11Q2 and the surge protector 11PRD in sequence.

5. The prefabricated box-type substation control circuit according to claim 1, characterized in that the protection control loop includes a safety relay 27KAU. The A1 and A2 ports of 27KAU are respectively connected to 15L04 and 15N04 correspondingly. The 13th pin of 27KAU is connected to 1L0. The 23rd pin of 27KAU is connected to SUB31. The S11 port of 27KAU is connected to the S12 port of 27KAU through six emergency stop buttons in sequence. The S21 port of 27KAU is connected to the S22 port of 27KAU through an emergency stop button; the S24 port of 27KAU is connected to SUB31. The 14th pin of 27KAU is connected to 18-1. The Y36 and Y37 ports of 27KAU are connected. The S34 port of 27KAU is connected to the S33 port of 27KAU through the switch 27SB1.

6. The prefabricated box-type substation control circuit according to claim 1, characterized in that The leakage protection module includes residual current detectors 25GF and 26GF. The L and N ports of 25GF are respectively connected to 1L0 and 1N0 correspondingly. The J1 port of 25GF is connected to 1L0 through the control terminal of relay 25K1. The J2 port of 25GF is connected to 1L0 through the control terminal of relay 25K2. The COM port of 25GF is connected to 1N0. The J3 port of 25GF is connected to 1L0 through the control terminal of relay 25K3. The J4 port of 25GF is connected to 1L0 through the control terminal of relay 25K4. The COM port of 25GF is connected to 1N0; The I1, I2, I3, and I4 ports of 25GF are respectively connected to the CM1 port of 25GF through residual current transformer probes 13T1, 13T2, 13T3, and 13T4; The L and N ports of 26GF are respectively connected to 1L0 and 1N0 correspondingly. The J1 port of 26GF is connected to 1L0 through the control terminal of relay 26K1. The J2 port of 26GF is connected to 1L0 through the control terminal of relay 26K2. The COM port of 26GF is connected to 1N0. The J3 port of 26GF is connected to 1L0 through the control terminal of relay 26K3. The COM port of 26GF is connected to 1N0; The I1, I2, and I3 ports of 26GF are respectively connected to the CM1 port of 26GF through residual current transformer probes 15T1, 17T1, and 17T2; 1L0 is successively connected to one end of the controlled normally open switch of safety relay 27KAU and one end of the controlled normally closed switch of transformer overtemperature protection relay 29KA1 through the controlled normally closed switches of protection relay 11KA1, relay 14KA1, and relay 12KA1 respectively; The other end of the controlled normally closed switch of 11KA1 is respectively connected to one end of the controlled normally closed switch of relay 25K1, one end of the controlled normally closed switch of relay 25K2, one end of the controlled normally closed switch of relay 25K3, and one end of the controlled normally closed switch of relay 25K4. The other end of the controlled normally closed switch of 25K1 is respectively connected to one end of 13UV1 and one end of indicator light 18D1. The other end of 13UV1 is respectively connected to the other end of 18D1 and 1N0; The other end of the controlled normally closed switch of 25K2 is respectively connected to one end of 13UV2 and one end of indicator light 18D2. The other end of 13UV2 is respectively connected to the other end of 18D2 and 1N0; The other end of the controlled normally closed switch of 25K3 is respectively connected to one end of 13UV3 and one end of indicator light 18D3. The other end of 13UV3 is respectively connected to the other end of 18D3 and 1N0; The other end of the controlled normally closed switch of 25K4 is respectively connected to one end of 13UV4 and one end of indicator light 18D4. The other end of 13UV4 is respectively connected to the other end of 18D4 and 1N0; The other end of the controlled normally closed switch of 14KA1 is respectively connected to one end of 15UV7 and one end of indicator light 18D5 through the controlled normally closed switch of relay 26K1. The other end of 15UV7 is respectively connected to 1N0 and the other end of 18D5; The other ends of the controlled normally-closed switches of 12KA1 are respectively connected to one end of the controlled normally-closed switch of relay 26K2 and one end of the controlled normally-closed switch of relay 26K3. The other end of the controlled normally-closed switch of 26K2 is respectively connected to one end of 17UV1 and one end of indicator light 18D6. The other end of 17UV1 is respectively connected to 1N0 and the other end of 18D6. The other end of the controlled normally-closed switch of 26K3 is respectively connected to one end of 17UV2 and one end of indicator light 18D7. The other end of 17UV2 is respectively connected to 1N0 and the other end of 18D7.

7. The prefabricated substation control circuit according to claim 1, characterized in that the remote I / O module includes a switching power supply 31U1. The input ends of 31U1 are respectively connected to 1L0 and 1N0. The output end of 31U1 is connected to the power supply end of the CONTROLNET SINGLE MEDIAADAPTOR MODULE. The 0 port of 31A3 is connected to the AO port of the transformer temperature controller 29DK. The 17 port of 31A3 is respectively connected to the 19 port of 31A3, the 21 port of 31A3, and the COM port of 29DK. The BO port of 29DK is connected to the 2 port of 31A3. The CO port of 29DK is connected to the 4 port of 31A3. The 0 port of 31A4 is connected to the AO port of the transformer temperature controller 46DK. The 17 port of 31A4 is respectively connected to the 19 port of 31A4, the 21 port of 31A4, and the COM port of 46DK. The BO port of 46DK is connected to the 2 port of 31A4. The CO port of 46DK is connected to the 4 port of 31A4. The 6 port of 31A4 is connected to the AO port of the transformer temperature controller 47DK. The 23 port of 31A4 is respectively connected to the 25 port of 31A4, the 27 port of 31A4, and the COM port of 47DK. The BO port of 47DK is connected to the 8 port of 31A4. The CO port of 47DK is connected to the 10 port of 31A4. The 0 port of 31A1 is connected to the 17Q1-SED switch, the 17 port of 31A1 is connected to the 26K2 MCC01 Ground fault trip switch, the 1 port of 31A1 is connected to the 05Q1-SDE switch, the 18 port of 31A1 is connected to the 48KA1 48KA2 Ground fault trip switch, the 2 port of 31A1 is connected to the 05Q2-SDE switch, the 19 port of 31A1 is connected to the 05Q3-SDE switch, the 3 port of 31A1 is connected to the 05Q4-SDE switch, the 20 port of 31A1 is connected to the 26K3 MCC04 Ground fault trip switch, the 4 port of 31A1 is connected to the 17Q2-SDE switch, the 21 port of 31A1 is connected to the 25K1 MCC05 Ground fault trip switch, the 22 port of 31A1 is connected to the 25K3 MCC09 Ground fault trip switch, the 6 port of 31A1 is connected to the 16Q3-SDE switch, the 23 port of 31A1 is connected to the 25K4 MCC08 Ground fault trip switch, the 7 port of 31A1 is connected to the 16Q4-SDE switch, the 24 port of 31A1 is connected to the 25K2 PDE11 Ground fault trip switch; The 0 port of 31A2 is connected to the 20Q1-SDE switch, the 17 port of 31A2 is connected to the 24Q3-SDE switch, the 1 port of 31A2 is connected to the 21Q1-SDE switch, the 18 port of 31A2 is connected to the 24Q4-SDE switch, the 2 port of 31A2 is connected to the 21Q2-SDE switch, the 19 port of 31A2 is connected to the 24Q5-SDE switch, the 3 port of 31A2 is connected to the 21Q3-SDE switch, the 4 port of 31A2 is connected to the 21Q4-SDE switch, the 5 port of 31A2 is connected to the 22Q1-SDE switch, the 6 port of 31A2 is connected to the 22Q2 switch, the 7 port of 31A2 is connected to the CBM50-09-SDE switch.

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