CN105305275B - A kind of binary box-type substation - Google Patents

Abstract

The invention provides a two-body box-type substation, which includes a structural box, a sealed functional box and an inert gas delivery device. The structure is provided with an accommodation space for accommodating the functional box, and the interior of the functional box is provided with an accommodation space for placing electrical equipment. , the functional box is arranged in the accommodation space inside the structural box and is supported and connected with the structural box through a plurality of supporting connection devices, the inert gas delivery device delivers the inert gas to the inside of the functional box through the gas delivery pipeline, and the inert gas conveyor passes through the gas delivery pipeline It is connected with the air inlet of the gas delivery pipe, and the supporting connection device includes: an annular fastener with an internal thread and a support for fixing the functional box in the structural box. The two-body box-type substation provided by the present invention improves the structural stability, insulation and flame retardancy of the box-type substation, can also effectively regulate the temperature and oxygen content of the substation, and improves the operation efficiency and service life of the substation.

Description

A two-body box-type substation

technical field

The invention relates to the technical field of substations of power transmission and distribution systems, in particular to a two-body box-type substation.

Background technique

In order to adapt to the development of the urbanization of the power system, the high-voltage substation needs to be miniaturized and can be produced in a factory. Box-type substation is a kind of high-voltage switchgear, distribution transformer and low-voltage power distribution device. It is a factory prefabricated indoor and outdoor compact power distribution equipment arranged according to a certain wiring scheme. It is about high-voltage power receiving, transformer step-down, low-voltage distribution Electricity and other functions are organically combined and installed in a moisture-proof, rust-proof, dust-proof, rodent-proof, fire-proof, anti-theft, heat-insulating, fully enclosed, movable steel structure box, mechanical and electrical integration, fully enclosed operation, especially It is suitable for the construction and transformation of urban network, and it is a brand-new substation rising after the civil substation. This is not only conducive to the selection of load center construction requirements in existing urban high-load density areas, but also conducive to the transformation of urban power grids, reducing the level of step-down, simplifying wiring, and greatly reducing power loss. The box-type substation is suitable for residential quarters, urban public substations, bustling downtown, construction power supply, etc. Users can choose box-type substations according to different usage conditions and load levels.

Since the box type substation came out, it has developed extremely rapidly. It has accounted for 70% of distribution transformers in developed countries in Europe and 90% in the United States. With the rapid development of China's urban modernization and the continuous renewal and transformation of urban distribution networks, it will be widely used. As an urban distribution network, the existing high voltage levels in most areas of my country are 220, 110, 60KV, medium voltage 35, 10KV, low voltage 0.4KV, and the step-down level is 3 levels. For example: 220/110/10/0.4KV, 220/35/10/0.4KV, 220/60/10/0.4KV or level 4. For example: 220/110/35/10/0.4KV.

The high-voltage side of the box-type substation in the existing box-type substation usually uses a combination switch of a load switch and a current-limiting fuse; There are obvious isolation fractures between the corresponding wiring knife seats; when switching on, first close the isolation switch, and then close the dynamic and static contacts in the vacuum interrupter. This structure has the following disadvantages: Although there is an obvious isolation fracture between the isolation knife seat and the corresponding wiring knife seat after the switch is opened, there is still a problem that the isolation knife seat is closed to the corresponding wiring knife seat due to misoperation. If a serious electric accident is caused, the isolation fracture only serves as an obvious indicator, and cannot essentially obtain the safety protection effect against misoperation. At the same time, the existing box-type substation is usually a single box-type structure, which is not only easy to damage, but also prone to leaks in the event of a fault, which affects the safety of use. Electrical equipment will not only affect the safety of equipment use, but also easily expand the hazards and affect the surrounding public safety.

Contents of the invention

(1) Technical problems to be solved

The two-body box-type substation provided by the present invention improves the insulation, flame resistance, operating efficiency and service life of the box-type substation.

(2) Technical solution

The invention provides a two-body box-type substation, including a structural box, a sealed functional box and an inert gas delivery device;

The inside of the structural box is provided with an accommodating space for accommodating the functional box; the inside of the functional box is provided with an accommodating space for placing electrical equipment;

The functional box is arranged in the accommodation space inside the structural box and is supported and connected to the structural box by a plurality of supporting connection devices;

The inert gas delivery device delivers the inert gas to the inside of the functional box through the gas delivery pipeline.

Further, the inert gas delivery device includes:

An inert gas conveyor with an air pump, a gas delivery pipe for delivering gas to the inside of the functional box, and an exhaust pipe for exhausting air to the outside of the functional box;

The inert gas conveyor is connected to the air inlet of the gas pipeline through a gas pipeline;

The air outlet of the air delivery pipe is arranged at the top of the functional box, the air inlet of the exhaust pipe is arranged at the bottom of the functional box, and the air outlet of the exhaust pipe is arranged outside the functional box.

Further, the air outlet of the air delivery pipe is provided with a pressure balance valve, and the air inlet of the exhaust pipe is provided with a pressure balance valve.

Further, the supporting connection device includes:

An annular fastener with an internal thread and a support for fixing the functional box in the structural box;

The outer surface of the functional box is provided with a hollow protrusion, and the hollow protrusion has an external thread matched with the internal thread of the ring clip;

The support piece protrudes into the hollow protrusion and is fastened by the ring clip, so that there is a space gap between the functional box and the structural box.

Further, the support is a cylindrical ceramic support.

Further, the functional box is divided into a transformer room, a switch room and an instrument room by partitions.

Further, the outer surface of the partition and the inner surface of the functional box are provided with a high temperature resistant layer.

Further, the high temperature resistant layer is a corundum ceramic layer.

Further, the two-body box-type substation also includes an oxygen content monitoring device, and the oxygen content monitoring device includes: an oxygen content sensor, an oxygen control microprocessor, an alarm and a communication module;

The oxygen content sensor, the alarm and the communication module are respectively connected in communication with the oxygen control microprocessor;

The oxygen content sensor is used to be installed in the functional box to detect the oxygen content of the functional box to obtain an oxygen content signal;

The oxygen control microprocessor is used to receive and judge whether the oxygen content signal has reached the alarm preset value, if yes, send an alarm signal and transmit a control signal to the inert gas delivery device, if not, then Stop sending alarm signals;

The alarm device is used to alarm or stop the alarm according to the alarm signal;

The communication module is used to receive the alarm signal and transmit the alarm signal to a remote monitoring terminal;

The oxygen content sensor transmits the oxygen content signal to the oxygen control microprocessor, and the oxygen control microprocessor transmits a control signal to the inert gas delivery device and sends a signal to the alarm and the communication module Send an alarm signal.

Further, the two-body box-type substation also includes a temperature control device, and the temperature control device includes:

The insulation layer is used to be installed between the functional box and the structural box to slow down the temperature dissipation rate of the functional box;

The temperature sensor is used to be installed in the functional box to detect the temperature of the functional box and obtain a temperature signal;

The temperature control microprocessor is used for receiving and judging whether the temperature signal reaches the preset heat preservation temperature preset value, if so, sending a heating signal, and if not, sending a heating stop signal;

The heater is used to receive the heating signal for heating, or receive the heating stop signal;

The temperature sensor and the heater are respectively connected in communication with the temperature control microprocessor;

The temperature sensor transmits a temperature signal to the temperature control microprocessor, and the temperature control microprocessor sends a heating or stopping heating signal to the heater.

(3) Beneficial effects

The two-body box-type substation provided by the present invention not only improves the structural stability, insulation and flame retardancy of the box-type substation, but also can effectively regulate the temperature and oxygen content of the substation, improving the operating efficiency and service life of the substation .

Description of drawings

Fig. 1 is a schematic structural diagram of a two-body box-type substation provided by Embodiments 1 and 2 of the present invention, wherein: 1. a structural box, 2. a functional box, 3. a partition, 4. an instrument room, 6. a switch room; 7. Transformer room, 8. Ceramic support, 9. Ring clip; 10. Inert gas conveyor with air pump, 11. Gas delivery pipe, 12. Pressure balance valve, 13. Exhaust pipe;

Fig. 2 is a schematic structural diagram of an oxygen content monitoring device provided in Example 1 of the present invention;

Fig. 3 is a schematic structural diagram of a temperature control device provided by Embodiment 2 of the present invention.

detailed description

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are the Some embodiments of the invention are not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Example 1:

The embodiment of the present invention provides a two-body box-type substation, as shown in FIG. 1 : it includes a structural box 1, a sealed functional box 2 and an inert gas delivery device;

The interior of the structural box 1 is provided with an accommodation space for accommodating the functional box 2; the interior of the functional box 2 is provided with an accommodation space for placing electrical equipment;

The inert gas delivery device delivers the inert gas to the inside of the functional box 2 through the gas delivery pipeline. Among them, the inert gas is preferably helium.

Specifically, the inert gas delivery device includes: an inert gas delivery device 10 with a gas pump, a gas delivery pipe 11 for delivering gas to the interior of the functional box, and an exhaust pipe 13 for exhausting gas to the outside of the functional box. The air inlet of gas delivery pipe 11 is connected.

The air outlet of air delivery pipe 11 is arranged on described functional box 2 inside, and the air inlet of exhaust pipe 13 is arranged on functional box 2 inside, and the air outlet of described exhaust pipe 13 is arranged on functional box 2 outsides.

Specifically, the air inlet of the air delivery pipe 11 is provided with a pressure balance valve 12 , and the air outlet of the exhaust pipe 13 is provided with a pressure balance valve 12 . Wherein, the air inlet of the pressure balance valve 12 (for controlling the intake of helium) is connected to the gas outlet of the gas delivery pipe 11, and the gas outlet of the pressure balance valve (for controlling the intake of helium) is arranged in the functional box 1, and the gas After passing through the pressure balance valve 12, it enters the function box 1; the outlet position of the function box 1 is connected to the air inlet of the pressure balance valve (for controlling the discharge of helium), and the gas outlet of the pressure balance valve (for controlling the discharge of helium) Connect the exhaust pipe 13 to the air inlet, and the gas is discharged out of the functional box 1 through the pressure balance valve 12 .

The functional box 2 is arranged in the accommodation space inside the structural box 1 and is supported and connected with the structural box 1 through a plurality of supporting connection devices;

Specifically, the support connection device includes: a ring clip 9 with an internal thread and a support 8 that fixes the functional box 2 in the structural box 1. The outer surface of the function box 2 is provided with a hollow protrusion corresponding to the ring clip. The hollow protrusion has an external thread (cooperating with the internal thread of the ring clamp), and the support member 8 extends into the hollow protrusion and is fastened by the ring clamp 9, so that there is a space between the functional box 2 and the structural box 1 interval. Wherein, the side surface and the bottom surface of the structural box 1 are equipped with support members 8 connecting devices. During installation, one end of the support 8 is snapped into the hollow protrusion, and the ring clamp 9 is sleeved on the outside of the support 8 from the other end of the support 8, and the internal thread of the ring clamp 9 and the external thread of the hollow protrusion Corresponding to the tightening, the support member 8 is fixed in the protrusion, and the support member 8 withstands the structural box 1, thereby forming a space interval.

Specifically, the support 8 is a cylindrical ceramic support.

Specifically, the outer surface of the partition and the inner surface of the functional box are provided with a high temperature resistant layer.

Specifically, the high temperature resistant layer is a corundum ceramic layer.

Specifically, the functional box 2 is divided into a transformer room 7 , a switch room 6 and an instrument room 4 through partitions. For example, the transformer room 7, switch room 6 and instrument room 4 can be divided into independent high-voltage frequency converter room, low-voltage frequency converter room, and high-voltage switch room through the partition 3. , Low-voltage switch room, high-voltage instrument room and low-voltage instrument room. Among them, the independent high-voltage frequency converter room, low-voltage frequency converter room, high-voltage switch room, low-voltage switch room, high-voltage instrument room, and low-voltage instrument room receive and discharge helium separately, and are respectively connected to independent gas delivery pipes 11 and exhaust pipes 13, After the gas delivery pipe 11 of the inert gas conveyor reaches the side of the functional box 2, it is divided into three pipelines and enters the transformer room 7, the switch room 6 and the instrument room 4 respectively, and each of the three pipelines reaches the transformer room 7 and the switch room 6 and above the front of the instrument room 4, it is divided into two pipelines and enters the high-pressure room and the low-pressure room. It can be understood that the final air pipeline 11 is divided into six pipelines and enters the high-voltage frequency converter room, low-voltage frequency converter room, and high-voltage switch room respectively. , low-voltage switch room, high-voltage instrument room and low-voltage instrument room, correspondingly, the high-voltage frequency converter room, low-voltage frequency converter room, high-voltage switch room, low-voltage switch room, high-voltage instrument room and low-voltage instrument room are also equipped with separate exhaust pipes In which, the exhaust pipelines of the low-pressure chamber and the high-pressure chamber of the switch room 6 and the instrument room 4 are combined into one exhaust pipeline to extend the outside of the functional box 2, and the high-pressure chamber and low-pressure exhaust pipeline of the inverter room Extend to the outside of the functional box 2 respectively.

Optionally, the substation also includes an oxygen content monitoring device, as shown in Figure 2, the oxygen content monitoring device includes: an oxygen content sensor 101, an oxygen control microprocessor 102, an alarm 103 and a communication module 104; The sensor 101, the alarm 102 and the communication module 104 are respectively connected to the oxygen control microprocessor 102 for communication; the oxygen content sensor 101 is used to be installed in the functional box 2 to detect the oxygen content of the functional box 2 to obtain an oxygen content signal ; The oxygen control microprocessor 102 is used to receive and judge whether the oxygen content signal has reached the alarm preset value, if yes, then send the alarm signal and transmit the control signal to the inert gas delivery device, if not, then stop sending the alarm signal The alarm device is used to alarm or stop the alarm according to the alarm signal; the communication module 104 is used to receive the alarm signal and transmit the alarm signal to the remote monitoring terminal; the oxygen content sensor 101 transmits the oxygen content signal to the The oxygen control microprocessor 102, the oxygen control microprocessor 102 transmits a control signal to the inert gas delivery device and sends a signal to the alarm 103 and the communication module

104 pieces send alarm signal.

Specifically, the oxygen content sensor 101 is configured to be installed in the functional box to detect the oxygen content of the functional box 2 to obtain an oxygen content signal. For example, the oxygen content sensor 201 is respectively installed in the transformer room 7, the switch room 6 and the instrument room 4 to detect the oxygen content in all the rooms of the functional box.

Oxygen control microprocessor 102 is used to receive and judge whether the oxygen content signal has reached the alarm preset value, if yes, then send the alarm signal, if not, then send the alarm stop signal.

The alarm device 103 is configured to receive an alarm signal to alarm, or receive an alarm stop signal to stop the alarm.

The communication module 104 is configured to receive an alarm signal and transmit the alarm signal to a remote monitoring terminal.

The oxygen content sensor 101 , the alarm 103 and the communication module 104 are respectively connected to the oxygen control microprocessor 102 in communication.

The oxygen content sensor 101 transmits the oxygen content signal to the oxygen control microprocessor 102, and the oxygen control microprocessor 102 sends an alarm or alarm stop signal to the alarm 103, the communication module 104 and the inert gas delivery device.

For example: the oxygen content sensor 101 detects the oxygen content and transmits an analog signal to the oxygen control microprocessor 102. After the oxygen control microprocessor 102 judges, the alarm signal transmitted to the inert gas delivery device 10 and the alarm 103 is a 24v switch value signal, when the oxygen content in the functional box 2 exceeds the maximum value of the alarm preset value, the oxygen control microprocessor 102 sends a 24v switch signal (alarm signal) to the normally open contact of the relay of the inert gas delivery device and the alarm, The relay receives the 24v switching value signal and conducts, the inert gas delivery device 10 starts to work, provides the helium gas in the functional box 2, thereby expelling the oxygen in the functional box 2; the alarm 103 starts to work, and the bell rings for warning. When the oxygen amount in the function box 2 is lower than the minimum value of the alarm preset value, the oxygen control microprocessor stops sending the 24v switch signal (alarm signal), and then sends the 24v switch signal (stop alarm signal) to the inertia The normally closed contact of the relay of the gas delivery device and the alarm 103, the relay receives the 24v switch signal and is disconnected, the inert gas delivery device 10 stops working, and the alarm 103 stops warning. During the working process, the oxygen content of each part in the functional box 2 is continuously monitored, and when the preset value is exceeded, an alarm is given and maintenance is prompted. Among them, the high-voltage frequency converter room, the low-voltage frequency converter room, the high-voltage switch room, the low-voltage switch room, the high-voltage instrument room, and the low-voltage instrument room are separately equipped with oxygen content sensors 101 .

Embodiments of the present invention have the following beneficial effects:

The double-body box-type substation provided by the present invention effectively enhances the structural strength and stability of the box body by nesting the functional box and the structural box, and connects the functional box and the structural box through ceramic supports to realize insulation connection and reduce the To eliminate the possibility of leakage during failure, the installation and fixation of the functional box and the structural box are kept stable through grooves and ring clips, the insulation and flame resistance of the box are improved through the ceramic layer, and the functional The oxygen in the box is kept below the alarm value, which not only reduces the probability of short-circuit combustion in the event of a fault, but also delays the aging of components in the substation box, increasing the service life of the components.

Example 2

The embodiment of the present invention also provides a two-body box-type substation, as shown in FIG. 1 , including a structural box 1, a sealed functional box 2 and an inert gas delivery device;

The interior of the structural box 1 is provided with an accommodation space for accommodating the functional box 2; the interior of the functional box 2 is provided with an accommodation space for placing electrical equipment;

The inert gas delivery device delivers the inert gas to the inside of the functional box 2 through the gas delivery pipeline. Among them, the inert gas is preferably helium.

Specifically, the inert gas delivery device includes: an inert gas delivery device 10 with a gas pump, a gas delivery pipe 11 for delivering gas to the interior of the functional box, and an exhaust pipe 13 for exhausting gas to the outside of the functional box. The air inlet of gas delivery pipe 11 is connected.

The air outlet of the air delivery pipe 11 is arranged inside the functional box 2 , the air inlet of the exhaust pipe 13 is arranged inside the functional box 2 , and the air outlet of the exhaust pipe 13 is arranged outside the functional box 2 .

Specifically, the air inlet of the air delivery pipe 11 is provided with a pressure balance valve 12 , and the air outlet of the exhaust pipe 13 is provided with a pressure balance valve 12 .

The functional box 2 is arranged in the accommodation space inside the structural box 1 and is supported and connected with the structural box 1 through a plurality of supporting connection devices;

The supporting connection device includes: an annular clip 9 with an internal thread and a support 8 for fixing the functional box 2 in the structural box 1. The outer surface of the functional box 2 is provided with a hollow protrusion corresponding to the annular clip. With external threads, the support piece 8 extends into the hollow protrusion and is fastened by the ring clip 9, so that there is a space gap between the functional box 2 and the structural box 1 . Both the side and the bottom surface of the structural box 1 are equipped with support members 8 connecting devices.

Specifically, the support 8 is a cylindrical ceramic support.

Specifically, the outer surface of the partition and the inner surface of the functional box are provided with a high temperature resistant layer.

Specifically, the high temperature resistant layer is a corundum ceramic layer.

Specifically, the functional box 2 is divided into a transformer room 7 , a switch room 6 and an instrument room 4 through partitions.

Optionally, the substation also includes a temperature control device. As shown in FIG. 3 , the temperature control device includes: an insulation layer, which is used to be installed between the functional box 2 and the structural box 1, to slow down the temperature dissipation rate of the functional box 1; The temperature sensor 201 is used to be installed in the functional box 2 to detect the temperature of the functional box 2 to obtain a temperature signal; the temperature control microprocessor 202 is used to receive and judge whether the temperature signal reaches the preset heat preservation Temperature preset value, if yes, then send heating signal, if not, then send stop heating signal; heater 203, is used for receiving described heating signal heating, or receives described stop heating signal; Described temperature sensor 201 and all The heater 203 is connected to the temperature control microprocessor 202 respectively; the temperature sensor 201 transmits a temperature signal to the temperature control microprocessor 202, and the temperature control microprocessor 202 sends a heating or stop heating signal to the The heater 203.

Specifically, the insulation layer is used to be installed between the functional box and the structural box to slow down the temperature dissipation speed of the functional box 1 .

The temperature sensor 201 is used to be installed in the functional box to detect the temperature of the functional box 2 and obtain a temperature signal. For example, the temperature sensor 201 is respectively installed in the transformer room 7, the switch room 6 and the instrument room 4 to detect the temperature of all the rooms of the functional box.

The temperature control microprocessor 202 is used for receiving and judging whether the temperature signal has reached the preset heat preservation temperature preset value, if so, sending a heating signal, and if not, sending a heating stop signal.

The heater 203 is configured to receive a heating signal to heat, or receive a heating stop signal.

The temperature sensor 201 and the heater 203 are communicated with the temperature control microprocessor 202 respectively.

The temperature sensor 201 transmits a temperature signal to the temperature control microprocessor 202 , and the temperature control microprocessor 202 sends a heating or heating stop number to the heater 203 .

For example: the temperature sensor 201 detects the temperature and transmits an analog signal to the temperature control microprocessor 202. After the temperature control microprocessor 202 judges, the signal transmitted to the heater 203 is a 24v switch signal. When the temperature in the function box 2 exceeds the preset When the value reaches the maximum value, the temperature control microprocessor 202 sends a 24v switch signal (heating signal) to the normally open contact of the relay of the heater 203, and the relay receives the 24v switch signal and conducts, and the heater 203 starts to work, increasing Function box 2 temperature. When the temperature in the functional box 2 is lower than the minimum value of the alarm preset value, the temperature control microprocessor 202 stops sending the 24v switch signal (heating signal), and sends the 24v switch signal (stop heating signal) to the heating The normally closed contact of the relay of the device 203, the relay receives the 24v switch signal and disconnects, and the heater 203 stops working. Wherein, the high-voltage frequency converter room, the low-voltage frequency converter room, the high-voltage switch room, the low-voltage switch room, the high-voltage instrument room and the low-voltage instrument room are separately provided with a temperature sensor 201 and a heater 203 .

Embodiments of the present invention have the following beneficial effects:

The double-body box-type substation provided by the present invention effectively enhances the structural strength and stability of the box body by nesting the functional box and the structural box, and connects the functional box and the structural box through ceramic supports to realize insulation connection and reduce the To eliminate the possibility of leakage during failure, the installation and fixation of the functional box and the structural box are kept stable through grooves and ring clips, the insulation and flame resistance of the box are improved through the ceramic layer, and the temperature control device is used to ensure the substation The components in the box are at the best working temperature, which improves the operating efficiency.

It should be noted that: the above descriptions are only preferred embodiments of the present invention, and are only used to illustrate the technical solution of the present invention, and are not used to limit the protection scope of the present invention. All modifications, equivalent replacements, improvements, etc. within the principles of the present invention are included within the protection scope of the present invention.

Claims (9)

1. A two-body box-type substation, characterized in that, comprising: a structural box, a sealed functional box and an inert gas delivery device; The inside of the structural box is provided with an accommodating space for accommodating the functional box; the inside of the functional box is provided with an accommodating space for placing electrical equipment; The functional box is arranged in the accommodation space inside the structural box and is supported and connected to the structural box by a plurality of supporting connection devices; The inert gas delivery device delivers the inert gas to the inside of the functional box through the gas delivery pipeline; The supporting connection device includes: An annular fastener with an internal thread and a support for fixing the functional box in the structural box; The outer surface of the functional box is provided with a hollow protrusion, and the hollow protrusion has an external thread matched with the internal thread of the ring clip; The support piece protrudes into the hollow protrusion and is fastened by the ring clip, so that there is a space gap between the functional box and the structural box. 2. The two-body box-type substation according to claim 1, wherein the inert gas delivery device comprises: An inert gas conveyor with an air pump, a gas delivery pipe for delivering gas to the inside of the functional box, and an exhaust pipe for exhausting air to the outside of the functional box; The inert gas conveyor is connected to the air inlet of the gas pipeline through a gas pipeline; The air outlet of the air delivery pipe is arranged at the top of the functional box, the air inlet of the exhaust pipe is arranged at the bottom of the functional box, and the air outlet of the exhaust pipe is arranged outside the functional box. 3. The two-body box-type substation according to claim 2, wherein a pressure balance valve is provided at the air outlet of the air delivery pipe, and a pressure balance valve is provided at the air inlet of the exhaust pipe. 4. The two-body box-type substation according to claim 1, wherein the support is a cylindrical ceramic support. 5. The two-body box-type substation according to claim 1, wherein the functional box is divided into a transformer room, a switch room and an instrument room by partitions. 6. The two-body box-type substation according to claim 5, wherein the outer surface of the partition and the inner surface of the functional box are provided with a high temperature resistant layer. 7. The two-body box-type substation according to claim 6, wherein the high temperature resistant layer is a corundum ceramic layer. 8. The double-body box-type substation according to any one of claims 1 to 6, characterized in that, the double-body box-type substation also includes an oxygen content monitoring device, and the oxygen content monitoring device includes: oxygen content Sensors, oxygen control microprocessors, alarms and communication modules; The oxygen content sensor, the alarm and the communication module are respectively connected in communication with the oxygen control microprocessor; The oxygen content sensor is used to be installed in the functional box to detect the oxygen content of the functional box to obtain an oxygen content signal; The oxygen control microprocessor is used to receive and judge whether the oxygen content signal has reached the alarm preset value, if yes, send an alarm signal and transmit a control signal to the inert gas delivery device, if not, then Stop sending alarm signals; The alarm device is used to alarm or stop the alarm according to the alarm signal; The communication module is used to receive the alarm signal and transmit the alarm signal to a remote monitoring terminal; The oxygen content sensor transmits the oxygen content signal to the oxygen control microprocessor, and the oxygen control microprocessor transmits a control signal to the inert gas delivery device and sends a signal to the alarm and the communication module Send an alarm signal. 9. The double-body box-type substation according to any one of claims 1 to 6, wherein the double-body box-type substation also includes a temperature control device, and the temperature control device includes: Insulation layer, used to be installed between the functional box and the structural box, to slow down the temperature dissipation rate of the functional box; a temperature sensor, configured to be installed in the functional box, detect the temperature of the functional box, and obtain a temperature signal; The temperature control microprocessor is used for receiving and judging whether the temperature signal reaches the preset heat preservation temperature preset value, if so, sending a heating signal, and if not, sending a heating stop signal; a heater, configured to receive the heating signal for heating, or receive the heating stop signal; The temperature sensor and the heater are respectively connected in communication with the temperature control microprocessor; The temperature sensor transmits a temperature signal to the temperature control microprocessor, and the temperature control microprocessor sends a heating or stopping heating signal to the heater.