110kV line switch tripping interlocking protection circuit

Abstract

The invention discloses a 110kV line switch tripping interlocking protection circuit, which relates to the field of circuit protection and comprises a pressing module used for being connected with an electrical system and performing pressing interlocking protection according to tripping conditions of different parts of the electrical system. And the processing module is connected with the pressing module and is used for processing and judging the electric signal transmitted by the pressing module. And the control module is used for receiving the electric signals sent by the processing module and performing control actions in the module. The operation module comprises a first operation module and a second operation module, the first operation module and the second operation module are independent from each other, and the first operation module and the second operation module are connected to the electrical system to control a switch of the electrical system; the first operation module and the second operation module synchronously receive signals of the control module and act to protect the electrical system.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of circuit protection, in particular to a 110kV line switch tripping interlocking protection circuit. BACKGROUND

[0002] Two 50MW units of Huaneng Nanjing Thermal Power Co., Ltd. are connected to the 110kV bus in the plant in the form of generator-transformer unit connection, and a load regulating double-winding standby transformer is provided in the whole plant, and the power is derived from the 110kV bus. The 110kV bus adopts double-bus connection, and is connected to the nearby Yudai transformer (Tongjiang transformer) 110kV bus through the 110kV double-circuit line, and the line is about 1km long (reference Figure 5 Huaneng Nanjing Thermal Power System Diagram).

[0003] According to the grid management and control requirements, the 110kV double-bus of the company is operated in a long-term split mode, so that the generator unit, the main transformer and the line connection to the grid are similar to the generator unit, the main transformer and the line unit. The existing line switch protection configuration is designed according to the 110kV double-bus loop operation, and when the 110kV line switch trips, the generator unit operating on the corresponding bus will be disconnected from the grid, and abnormal conditions such as turbine overspeed and short-term loss of power supply will occur, which seriously affects continuous heating and safe shutdown of the unit. SUMMARY

[0004] Therefore, the technical problem to be solved by the present application is to solve the technical problem that when the 110kV line switch trips, the generator unit operating on the corresponding bus will be disconnected from the grid, and abnormal conditions such as turbine overspeed and short-term loss of power supply will occur, which seriously affects continuous heating and safe shutdown of the unit.

[0005] The above technical problem is solved by the following technical scheme: the present application provides a 110kV line switch tripping interlocking protection circuit, which comprises a pressing module connected to an electrical system, and performs pressing interlocking protection according to the tripping condition of different parts of the electrical system.

[0006] A processing module connected to the pressing module is used to process and judge the electrical signal transmitted by the pressing module.

[0007] A control module is used to receive the electrical signal sent by the processing module and perform control action in the module.

[0008] A running module comprises a first running module and a second running module, the first running module and the second running module are independent of each other, the first running module and the second running module are connected to the electrical system to control the switch of the electrical system, and the first running module and the second running module synchronously receive the signal of the control module and perform action to protect the electrical system.

[0009] In a preferred embodiment of the 110kV line switch tripping interlock protection circuit, the pressing module comprises a first pressing module connected to the electrical system and a second pressing module connected to the electrical system, and the first pressing module and the second pressing module are independent of each other.

[0010] In a preferred embodiment of the 110kV line switch tripping interlock protection circuit, the first pressing module comprises a first operating module pressing switch, a second operating module pressing switch, and an operating module pressing switch connected to the electrical system and electrically connected to the processing module.

[0011] In a preferred embodiment of the 110kV line switch tripping interlock protection circuit, the processing module comprises a first processing module for receiving signals transmitted by the first pressing module and a second processing module for receiving signals transmitted by the second pressing module.

[0012] In a preferred embodiment of the 110kV line switch tripping interlock protection circuit, the control module comprises a first control module for receiving signals transmitted by the first processing module and electrically connected to the first operating module and the second operating module, and a second control module for receiving signals transmitted by the second processing module and electrically connected to the first operating module and the second operating module.

[0013] In a preferred embodiment of the 110kV line switch tripping interlock protection circuit, the control module is provided with a first main transformer switch contact connected to the first processing module, a second main transformer switch contact, and a third main transformer switch contact, the first main transformer switch contact is used to receive electrical signals transmitted by the first operating module pressing switch, the second main transformer switch contact is used to receive electrical signals transmitted by the second operating module pressing switch, and the third main transformer switch contact is used to receive electrical signals transmitted by the operating module pressing switch.

[0014] In a preferred embodiment of the 110kV line switch tripping interlock protection circuit, the control module is further provided with a fourth main transformer switch contact and a fifth main transformer switch contact connected to the first processing module, and the input ends of the fourth main transformer switch contact and the fifth main transformer switch contact are connected in parallel to the output end of the third main transformer switch contact, for transmitting signals of the third main transformer switch to the first operating module.

[0015] In a preferred embodiment of the 110kV line switch tripping interlock protection circuit, the first operating module is provided with a first control switch connected with the first control module wire, and the first operating module is provided with a second control switch connected with the second control module wire, and the first control switch and the second control switch are used for quickly opening and closing the switches in the first operating module.

[0016] In a preferred embodiment of the 110kV line switch tripping interlock protection circuit, the first control switch includes a first control switch contact connected with the first main transformer switch contact wire, and a second control switch contact connected with the fourth main transformer switch contact wire, so as to realize the opening and closing control of all switches in the first operating module under the action of the first operating module pressing switch and the operating module pressing switch.

[0017] In a preferred embodiment of the 110kV line switch tripping interlock protection circuit, the second control switch includes a third control switch contact connected with the second control module wire, and a fourth control switch contact.

[0018] The 110kV line switch tripping interlock protection circuit has the following advantages: the pressing module can accurately respond to the tripping of different situations in the electrical system, and then transmit the signal to the processing module, the processing module controls the fast switching device of the turbine circuit to quickly open the circuit after receiving the signal, maintains the stable operation of the turbine, and at the same time, the processing module transmits the signal to the control module, the control module controls all switches in the main transformer control cabinet to quickly cut off the power supply and start the full stop protection, and at the same time, the signal can be transmitted to the first operating module and the second operating module to cut off all switches controlled by the first operating module and the second operating module. When the unit is normally running (excluding start and stop and 110kV operation mode switching), if the 110kV outgoing line 9GF switch and 9GG switch abnormally trip, the unit full stop protection can be quickly started, including splitting and de-excitation, closing the main steam valve, starting the plant power fast switching, etc. Through these actions, the turbine speed is stabilized, the plant power is switched in time, the boiler load is stabilized, the shutdown does not stop the furnace, the heating is not interrupted, and the electrical system is further protected. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below only relate to some embodiments of the present application, but not limit the present application. Among them:

[0020] Figure 1A 110kV line switch tripping interlock protection circuit diagram is shown in the application.

[0021] Figure 2 A first control module structure diagram in the 110kV line switch tripping interlock protection circuit is shown in the application.

[0022] Figure 3 A first operation module structure diagram in the 110kV line switch tripping interlock protection circuit is shown in the application.

[0023] Figure 4 A second operation module structure diagram in the 110kV line switch tripping interlock protection circuit is shown in the application.

[0024] Figure 5 An existing electrical system diagram is shown. DETAILED DESCRIPTION

[0025] In order for those skilled in the art to better understand the present application, the present application will be further described in detail below in conjunction with specific embodiments and accompanying drawings.

[0026] The terms used in the present application are those general terms currently widely used in the art in consideration of the functions related to the present application, but these terms can be changed according to the intention of those skilled in the art, precedents, or new technology in the art. In addition, specific terms can be selected by the applicant, and in this case, the detailed meaning thereof will be described in the detailed description of the present application. Therefore, the terms used in the specification should not be understood as simple names, but based on the meaning of the terms and the overall description of the present application.

[0027] REFERENCE Figure 1 The present embodiment provides a 110kV line switch tripping interlock protection circuit, which comprises a pressing module 1 connected with an electrical system, and performs pressing interlock protection according to the tripping conditions of different parts of the electrical system.

[0028] A processing module 2 connected with the pressing module 1, for processing and judging the electrical signal transmitted by the pressing module 1.

[0029] A control module 3 for receiving the electrical signal sent by the processing module 2 and performing control action within the module.

[0030] The running module 4 comprises a first running module 41 and a second running module 42, the first running module 41 and the second running module 42 are independent of each other, the first running module 41 and the second running module 42 are connected to the electrical system and control the switch of the electrical system, the first running module 41 and the second running module 42 synchronously receive the signal of the control module 3 and act, and the electrical system is protected. The processing module 2, the control module 3 and the running module 4 all increase new functions on the basis of the existing modules, the existing processing module 2 is a non-electric quantity protection panel of a generator-transformer group, the function of receiving and processing the signal transmitted by the pressing module 1 is added through the setting of the application; the existing control module 3 is a main transformer control cabinet, the function of receiving the signal transmitted after being processed by the processing module 2 and controlling the setting in the main transformer control cabinet and further transmitting the signal is added through the setting of the application; the existing running module 4 is a control cabinet, the function of receiving the signal transmitted by the control module 3 and controlling the setting in the control cabinet is added through the setting of the application. The abnormal signal of the electrical system is reacted by the pressing module 1, and then the signal is transmitted to the processing module 2, the electrical signal transmitted by the pressing module 1 is processed and judged by the processing module 2, and then the signal is transmitted to the control module 3, the setting in the main transformer control cabinet is controlled by the control module 3, and the signal can be transmitted to the first running module 41 and the second running module 42, the internal equipment of the first running module 41 and the second running module 42 is adjusted, and the electrical system is further protected. The pressing module 1 selects the switch body (the switch corresponding to the first running module pressing switch 111, the second running module pressing switch 112 and the running module pressing switch 113 respectively) contact point, forms a loop through a cable and is connected to the processing module 2, and the abnormal conditions such as cable insulation reduction, external electromagnetic interference, direct current grounding may cause protection misoperation. Therefore, the cable core wire is required to be insulated to the ground, the core wires are required to be well insulated, the cable shielding layer is required to be grounded according to the regulation, the direct current system is required to be well insulated and no alternating current is required to be introduced.

[0031] As an optional embodiment, the pressing module 1 comprises a first pressing module 11 connected with the electrical system and a second pressing module 12 connected with the electrical system, the first pressing module 11 and the second pressing module 12 are independent of each other. The first pressing module 11 and the second pressing module 12 control two independent connection circuits of the electrical system respectively, and standby can be realized through the control of the two circuits, and the operation of the other circuit can be realized when a fault occurs in one circuit.

[0032] As an optional embodiment, the first pressing module 11 comprises an access electrical system, and the first operation module pressing switch 111, the second operation module pressing switch 112, and the operation module pressing switch 113 electrically connected with the processing module 2. The first operation module pressing switch 111, the second operation module pressing switch 112, and the operation module pressing switch 113 can electrically connect the electrical system with the protection circuit. When the electrical system trips, the first operation module pressing switch 111, the second operation module pressing switch 112, and the operation module pressing switch 113 can drive the protection circuit to act in time, so as to quickly start the electrical system unit full stop protection, including the action of splitting and de-exciting, closing the main steam valve, and starting the plant power fast switching. Through these actions, the steam turbine speed is stabilized, the plant power is switched in time, the boiler load is stabilized, the shutdown is not stopped, the heating is not interrupted, and the safety is ensured. The first operation module pressing switch 111 is the “9GF switch tripping start 1 unit full stop” in the figure, the second operation module pressing switch 112 is the “9GG switch tripping start 1 unit full stop” in the figure, and the operation module pressing switch 113 is the “701 switch tripping start 1 unit full stop”. The second pressing module 12 has the same structure as the first pressing module 11.

[0033] As an optional embodiment, the processing module 2 comprises the first processing module 21 receiving the signal transmitted by the first pressing module 11, and the second processing module 22 receiving the signal transmitted by the second pressing module 12. The first processing module 21 and the second processing module 22 are connected to the electrical system, and the first processing module 21 and the second processing module 22 are independent of each other, and the first processing module 21 and the second processing module 22 have the same structure.

[0034] As an optional embodiment, the control module 3 comprises the first control module 31 receiving the signal transmitted by the first processing module 21, and the second control module 32 receiving the signal transmitted by the second processing module 22, and the first control module 31 and the second control module 32 are electrically connected with the first operation module 41 and the second operation module 42. The first control module 31 and the second control module 32 are connected with the electrical system, and the first control module 31 and the second control module 32 are independent of each other, and the first control module 31 and the second control module 32 have the same structure.

[0035] As an optional embodiment, the control module 3 is provided with a first main transformer switch contact point 311, a second main transformer switch contact point 312 and a third main transformer switch contact point 313 connected with the first processing module 21 by wires, the first main transformer switch contact point 311 is used to receive the electrical signal transmitted by the first operation module press switch 111, the second main transformer switch contact point 312 is used to receive the electrical signal transmitted by the second operation module press switch 112, and the third main transformer switch contact point 313 is used to receive the electrical signal transmitted by the operation module press switch 113. The first main transformer switch contact point 311, the second main transformer switch contact point 312 and the third main transformer switch contact point 313 are used to control the opening and closing of all switches in the control module 3, and provide a fast opening and closing command when tripping, and further transmit the signal to the first operation module 41 and the second operation module 42 to control the operation of the switches in the first operation module 41 and the second operation module 42.

[0036] As an optional embodiment, the control module 3 is further provided with a fourth main transformer switch contact point 314 and a fifth main transformer switch contact point 315 connected with the first processing module 21 by wires, the input ends of the fourth main transformer switch contact point 314 and the fifth main transformer switch contact point 315 are connected in parallel with the output end of the third main transformer switch contact point 313, and are used to transmit the signal of the third main transformer switch contact point 313 to the first operation module 41. The fourth main transformer switch contact point 314 and the fifth main transformer switch contact point 315 are connected in parallel and connected with the output end of the third main transformer switch contact point 313 by wires, and the signal transmitted by the third main transformer switch contact point 313 is transmitted to the first operation module 41 and the second operation module 42 through the fourth main transformer switch contact point 314 and the fifth main transformer switch contact point 315 synchronously, so as to control the operation of the switches in the first operation module 41 and the second operation module 42.

[0037] As an optional embodiment, the first operation module 41 is provided with a first control switch 411 connected with the first control module 31 by wires, and the first operation module 41 is provided with a second control switch 412 connected with the second control module 32 by wires, and the first control switch 411 and the second control switch 412 are used to quickly open and close the switches in the first operation module 41. The first control switch 411 is used to open and close the switches in the first operation module 41 according to the signal of the first control module 31, and the second control switch 412 is used to open and close the switches in the first operation module 41 according to the signal of the second control module 32.

[0038] As an optional embodiment, the first control switch 411 includes a first control switch contact point 4111 connected with the first main transformer switch contact point 311 by wires, and a second control switch contact point 4112 connected with the fourth main transformer switch contact point 314 by wires, and is used to control the opening and closing of all switches in the first operation module 41 under the action of the first operation module press switch 111 and the operation module press switch 113.

[0039] As an optional embodiment, the second control switch 412 includes a third control switch contact 4121 connected with the second control module 32 and a fourth control switch contact 4122. The third control switch contact 4121 is used to transmit the signal of the first operation module press switch 111 in the second control module 32, and the fourth control switch contact 4122 is used to transmit the signal of the operation module press switch 113 in the second control module 32, so as to realize the on-off control of all switches in the first operation module 41.

[0040] The second operation module 42 includes a third control switch 421 connected with the first control module 31 and a fourth control switch 422 connected with the second control module 32. The third control switch 421 includes a fifth control switch contact 4211 connected with the second main switch contact 312 and a sixth control switch contact 4212 connected with the fifth main switch contact 315. The fourth control switch 422 can accurately transmit the signals of the second operation module press switch 112 and the operation module press switch 113 in the second control module 32 to the second operation module 42, and realize the on-off control of all switches in the second operation module 42.

[0041] The tripping protection conditions of the switches are as follows:

[0042] 1. When the 110kV line, the main transformer and the generator set are normally operated, the corresponding linkage press switch is put into operation. The specific operation mode and the press switch to be put into are as follows:

[0043] 1) When the Yure 1 line 9GF line and the 1 generator transformer group are simultaneously operated on the 110kV positive bus 621 or the auxiliary bus 622, the "9GF switch tripping starts 1 unit full stop" press switch is put into operation.

[0044] 2) When the Yure 1 line 9GF line and the 2 generator transformer group are simultaneously operated on the 110kV positive bus 621 or the auxiliary bus 622, the "9GF switch tripping starts 2 unit full stop" press switch is put into operation.

[0045] 3) When the Yure 1 line 9GF line and the 1, 2 generator transformer groups are simultaneously operated on the 110kV positive bus 621 or the auxiliary bus 622, the "9GF switch tripping starts 1 unit full stop" and "9GF switch tripping starts 2 unit full stop" press switches are put into operation.

[0046] 4) When the Yure 2 line 9GG line and the 1 generator transformer group are simultaneously operated on the 110kV positive bus or the auxiliary bus, the "9GG switch tripping starts 1 unit full stop" press switch is put into operation.

[0047] 5) When the Yure 2 line 9GG line and the 2 generator transformer group are simultaneously operated on the 110kV positive bus or the auxiliary bus, the "9GG switch tripping starts 2 unit full stop" press switch is put into operation.

[0048] 6) Yure 2 line 9GG line and 1, 2, 2 generator group run on 110KV positive bus or auxiliary bus, put in "9GG switch trip start 1 unit full stop" "9GG switch trip start 2 unit full stop" press switch.

[0049] 7) 1 generator group runs, put in "701 switch trip start 1 unit full stop" press switch.

[0050] 8) 2 generator group runs, put in "702 switch trip start 2 unit full stop" press switch.

[0051] 2. When the unit starts and stops, the 110kV system changes the operation mode and the special operation mode appears, the corresponding press switch should be exited, that is Figure 2 The right side of the standby circuit fails, and the standby circuit is connected with the circuit in the application.

[0052] 1) Yure 1 line 9GF line, 01 start standby variable, 1 generator group runs on 110KV positive bus or auxiliary bus, exit "9GF switch trip start 1 unit full stop" press switch.

[0053] 2) Yure 1 line 9GF line, 01 start standby variable, 2 generator group runs on 110KV positive bus or auxiliary bus, exit "9GF switch trip start 2 unit full stop" press switch.

[0054] 3) Yure 2 line 9GG line, 01 start standby variable, 1 generator group runs on 110KV positive bus or auxiliary bus, exit "9GG switch trip start 1 unit full stop" press switch.

[0055] 4) Yure 2 line 9GG line, 01 start standby variable, 2 generator group runs on 110KV positive bus or auxiliary bus, exit "9GG switch trip start 2 unit full stop" press switch.

[0056] 5) 1 generator set starts and stops, exit "9GF switch trip start 1 unit full stop" "9GG switch trip start 1 unit full stop" "701 switch trip start 1 unit full stop" press switch.

[0057] 6) 2 generator set starts and stops, exit "9GF switch trip start 2 unit full stop" "9GG switch trip start 2 unit full stop" "702 switch trip start 2 unit full stop" press switch.

[0058] 7)01 standby to exit operation, exit "9GF switch tripping start 1 unit full stop" "9GG switch tripping start 1 unit full stop" "701 switch tripping start 1 unit full stop" "9GF switch tripping start 2 unit full stop" "9GG switch tripping start 2 unit full stop" "702 switch tripping start 2 unit full stop" press the switch.

[0059] In use: by pressing module 1 can accurately to the electrical system in different situations of tripping make a quick response, and then the signal transmission to processing module 2, processing module 2 receives the signal control turbine circuit fast switching device for fast break, maintain the stable operation of the turbine, while processing module 2 signal to the control module 3, by the control module 3 to the main transformer control cabinet in all switches are controlled, fast cut off power start full stop protection, while being able to pass the signal to the first running module 41 and the second running module 42, the first running module 41 and the second running module 42 controlled switch are all cut off, in the normal operation of the unit (not including start, stop and 110kV operation mode switching), once 110kV out line 9GF switch, 9GG switch appears abnormal tripping, can quickly start unit full stop protection, including the column of the magnetic field, close the main steam valve, start the plant electricity fast switching and other actions. Through these actions, ensure the stability of the turbine speed, plant electricity switching in time, maintain the stability of the boiler load, realize the stop without stopping the furnace, protect the heating without interruption further protection of the electrical system.

[0060] The existing electrical system, including the 110kV line switch tripping interlock protection circuit in the above embodiment, further comprising, input circuit 5, input circuit 5 includes generator 51, and main transformer voltage 52, for generating current and controlling transmission of voltage.

[0061] Connection circuit 6, connection circuit 6 includes switch 61 connected with main transformer voltage 52, and bus 62 connected with switch 61, switch 61 is used for converting the current adjusted by main transformer voltage 52; bus 62 transmits the current transmitted by switch 61.

[0062] Output circuit 7, output circuit 7 includes first switch 71 connected with bus 62, second switch 72 connected with bus 62, and total switch 73 connected with output end of first switch 71 and second switch 72 in parallel, for connecting with jade heat 1 line 9GF and jade heat 2 line 9GG power supply. The current generated and transmitted by input circuit 5 is transmitted to output circuit 7 through connection circuit 6, so as to supply power for jade heat 1 line 9GF and jade heat 2 line 9GG.

[0063] Preferably, it further includes a plant loop 8, the plant loop 8 includes a high-voltage plant transformer 81 electrically connected with the generator 51, and a plant bus 82 electrically connected with the high-voltage plant transformer 81, for supplying the current generated by the generator 51 to the power supply of the daily required equipment of the plant. The current generated by the generator 51 is controlled by the high-voltage plant transformer 81 arranged, and then can be output to the plant bus 82 to meet the power supply requirements of the plant electrical equipment. The input end of the high-voltage plant transformer 81 is electrically connected with the first connecting wire through the ninth connecting wire, and the input end of the plant bus 82 is electrically connected with the output end of the high-voltage plant transformer 81 through the tenth connecting wire.

[0064] Further, the input loop 5 includes the generator 51.

[0065] The input end of the main transformer 52 is electrically connected with the generator 51 through the first connecting wire.

[0066] As an optional embodiment, the connection loop 6 includes a transfer switch 61, which includes a main transformer switch 611, a first main transformer switch 612 connected in parallel with the output end of the main transformer switch 611, and a second main transformer switch 613, one end of which is connected to the output end of the main transformer 52 through the second connecting wire.

[0067] The bus 62 includes a positive bus 621 and a secondary bus 622, the output end of the first main transformer switch 612 is electrically connected with the positive bus 621 through the third connecting wire, and the output end of the second main transformer switch 613 is electrically connected with the secondary bus 622 through the fourth connecting wire.

[0068] As an optional embodiment, the output loop 7 includes a first switch 71, the input end of which is electrically connected with the positive bus 621 through the fifth connecting wire.

[0069] The input end of the second switch 72 is electrically connected with the secondary bus 622 through the sixth connecting wire.

[0070] The output ends of the first switch 71 and the second switch 72 are connected in parallel with the input end of the total switch 73, and the output end of the total switch 73 is connected with the 9GF output line through the seventh connecting wire. Two output loops 7 are arranged side by side, and the output end of the total switch 73 of the other output loop 7 is electrically connected with the 9GG line through the eighth connecting wire.

[0071] In use: when the unit is running normally, once the 110kV output switch 9GF and the 9GG switch trip abnormally, the unit full-stop protection can be started quickly, including splitting and de-exciting, closing the main steam valve, starting the plant power quick switching and other actions. Through these actions, the steam turbine speed is stabilized, the plant power is switched in time, the boiler load is stabilized, the shutdown without stopping the boiler is realized, the heating is uninterrupted, and the electrical system is further protected.

[0072] It should finally be noted that the methods and devices described in detail above are merely embodiments, which the person skilled in the art can modify in different ways, without departing from the scope of the present application.

Claims

1. A 110kV line switch tripping interlocking protection circuit, characterized in that: include, Press module (1) is used to connect with the electrical system and perform press interlock protection according to the tripping situation of different parts of the electrical system; The processing module (2) is connected to the pressing module (1) and is used to process and judge the electrical signals transmitted by the pressing module (1); Control module (3), the control module (3) is used to receive electrical signals sent by processing module (2) and perform control actions within the module; and The operation module (4) includes a first operation module (41) and a second operation module (42). The first operation module (41) and the second operation module (42) are independent of each other. Both the first operation module (41) and the second operation module (42) are connected to the electrical system to control the switch of the electrical system. The first operation module (41) and the second operation module (42) synchronously receive the signal from the control module (3) and perform actions to protect the electrical system.

2. The 110kV line switch tripping interlocking protection circuit according to claim 1, characterized in that: The pressing module (1) includes a first pressing module (11) connected to the electrical system and a second pressing module (12) connected to the electrical system, wherein the first pressing module (11) and the second pressing module (12) are independent of each other.

3. The 110kV line switch tripping interlocking protection circuit according to claim 2, characterized in that: The first pressing module (11) includes a first operating module pressing switch (111), a second operating module pressing switch (112), and an operating module pressing switch (113) that are connected to the electrical system and electrically connected to the processing module (2).

4. The 110kV line switch tripping interlocking protection circuit according to claim 3, characterized in that: The processing module (2) includes a first processing module (21) that receives signals transmitted from the first pressing module (11) and a second processing module (22) that receives signals transmitted from the second pressing module (12).

5. The 110kV line switch tripping interlocking protection circuit according to claim 4, characterized in that: The control module (3) includes a first control module (31) that receives signals transmitted by the first processing module (21) and is electrically connected to the first operating module (41) and the second operating module (42), and a second control module (32) that receives signals transmitted by the second processing module (22) and is electrically connected to the first operating module (41) and the second operating module (42).

6. The 110kV line switch tripping interlocking protection circuit according to claim 5, characterized in that: The control module (3) is provided with a first main transformer switch contact (311), a second main transformer switch contact (312), and a third main transformer switch contact (313) connected to the first processing module (21) by wires. The first main transformer switch contact (311) is used to receive the electrical signal transmitted by the first operating module push switch (111), the second main transformer switch contact (312) is used to receive the electrical signal transmitted by the second operating module push switch (112), and the third main transformer switch contact (313) is used to receive the electrical signal transmitted by the operating module push switch (113).

7. The 110kV line switch tripping interlocking protection circuit according to claim 6, characterized in that: The control module (3) is also provided with a fourth main transformer switch contact (314) and a fifth main transformer switch contact (315) connected to the first processing module (21) by wires. The input terminals of the fourth main transformer switch contact (314) and the fifth main transformer switch contact (315) are connected in parallel to the output terminal of the third main transformer switch contact (313) to transmit the signal of the third main transformer switch contact (313) to the first operating module (41).

8. The 110kV line switch tripping interlocking protection circuit according to claim 7, characterized in that: The first operating module 41 is provided with a first control switch (411) connected to the first control module 31 by wires, and the first operating module (41) is provided with a second control switch (412) connected to the second control module (32) by wires. The first control switch (411) and the second control switch (412) are both used to quickly open and close the switch in the first operating module (41).

9. The 110kV line switch tripping interlocking protection circuit according to claim 8, characterized in that: The first control switch (411) includes a first control switch contact (4111) connected to the first main transformer switch contact (311) by wire, and a second control switch contact (4112) connected to the fourth main transformer switch contact (314) by wire, which is used to realize the opening and closing control of all switches in the first operating module (41) under the action of the first operating module press switch (111) and the operating module press switch (113).

10. The 110kV line switch tripping interlocking protection circuit according to claim 9, characterized in that: The second hub switch (412) includes a third hub switch contact (4121) and a fourth hub switch contact (4122) connected to the wires of the second control module (32).

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