Environment-friendly gas insulation primary and secondary fusion complete ring main unit based on magnetic control technology

Abstract

According to the environment-friendly gas insulation primary and secondary fusion complete ring main unit based on the magnetic control technology, a first gas box is divided into a primary loop cavity and a secondary loop cavity through a box body piston, and the primary loop cavity and the secondary loop cavity are filled with different insulation gases respectively. The primary loop cavity is filled with first insulating gas, and the gas pressure is dynamically adjusted through the magnetic control technology to enhance the arc extinguishing performance. The secondary circuit cavity can be filled with second insulating gas to provide a stable environment for the secondary circuit, and the secondary circuit cavity can be communicated with the primary circuit cavity through the ventilation system to mix the gas so as to improve the arc extinguishing performance. In addition, the ring main unit is additionally provided with a second gas tank which is filled with third insulating gas with different characteristics from the first insulating gas. And a second gas flow port controlled by the controller is arranged between the second gas tank and the first gas tank, and when necessary, the controller can open the valve to enable the third insulating gas to flow into the primary loop cavity, so that the gas composition is flexibly adjusted, and the arc extinguishing effect is optimized.

Description

Technical Field

[0001] The present application relates to the technical field of electric power equipment, and in particular to an environmentally friendly gas-insulated primary and secondary fusion ring main unit based on magnetron technology. Background Art

[0002] The integrated primary and secondary ring main unit is an important secondary distribution equipment in the power system. It redistributes the electric energy of the primary distribution equipment powered by the high-voltage transformer, and realizes safe and economical power control through basic components such as load switches and fuses. This type of ring main unit has the advantages of simple structure, small size and low price, and is widely used in power distribution in urban and rural power grids. In recent years, with the advancement of smart grid construction and the improvement of energy conservation and emission reduction requirements, the integrated primary and secondary ring main unit is gradually developing towards higher safety, reliability and miniaturization.

[0003] The application of environmentally friendly gas insulation technology in primary and secondary integrated ring main units has become an industry trend. Although the traditional SF6 gas insulated ring main unit has good electrical insulation performance and excellent arc extinguishing performance, its environmental pollution problem is becoming increasingly prominent. Environmentally friendly gas insulated ring main units greatly reduce environmental pollution by using new environmentally friendly gases such as nitrogen fluoride to replace SF6 gas, while improving the cost-effectiveness of the equipment throughout its life cycle. In addition, environmentally friendly gas insulated ring main units also have the characteristics of high electrical strength and excellent insulation performance, which effectively avoids problems such as equipment failure.

[0004] As the power system develops towards higher voltage levels and more complex network structures, the limitations of single gas in terms of arc extinguishing speed, arc cooling capacity and insulation recovery speed are becoming increasingly apparent. Especially under frequent operation or fault conditions, it may not be able to quickly and effectively suppress arcs, affecting the safety, stability and power supply continuity of the power grid. Summary of the invention

[0005] The purpose of the present application is to provide an environmentally friendly gas-insulated primary and secondary fusion ring main unit based on magnetron technology, which can improve the above-mentioned problems.

[0006] The embodiment of the present application is implemented as follows: The present application provides an environmentally friendly gas-insulated primary and secondary integrated ring main unit based on magnetic control technology, which comprises: a first gas box for accommodating a circuit breaker and a controller for controlling the on and off of the circuit breaker, and a mechanism chamber for accommodating a circuit breaker operating mechanism; A box piston is provided in the first gas box, and the box piston divides the first gas box into a closed primary circuit cavity and a secondary circuit cavity; the primary circuit cavity is used to set the primary circuit, and the secondary circuit cavity is used to set the secondary circuit, and the primary circuit cavity is filled with a first insulating gas; a cover plate covering the box piston and a cover plate driving device are also provided in the secondary circuit cavity, and the cover plate driving device is used to drive the cover plate to move in a direction perpendicular to the cover plate under the control of the controller; The controller is used to control the cover plate driving device to drive the cover plate to push the box piston to compress the volume of the primary circuit cavity while controlling the circuit breaker to disconnect.

[0007] It can be understood that the first insulating gas used in the ring network cabinet provided by the present application is an environmentally friendly gas such as nitrogen. Although it is superior to traditional SF6 gas in terms of environmental protection and safety, it is relatively weak in terms of insulation and arc extinguishing performance, and it is difficult to cope with situations with strong arc extinguishing capabilities. In the present application, the secondary circuit is used to detect the operating conditions of each device in the primary circuit in real time, and feedback to the controller when an abnormality is found in the equipment, and the controller controls the circuit breaker to disconnect accordingly. An arc may be generated when the circuit breaker is disconnected. Therefore, in the present application, the controller simultaneously controls the cover plate drive device to drive the cover plate to push the box piston to compress the volume of the primary circuit cavity, increase the air pressure of the first insulating gas in the primary circuit cavity, and thus enhance its arc extinguishing performance.

[0008] In an optional embodiment of the present application, the secondary circuit cavity is filled with a second insulating gas, and the gas properties of the second insulating gas are different from those of the first insulating gas; a ventilation system is also arranged between the primary circuit cavity and the secondary circuit cavity, and when the ventilation system is turned on, the primary circuit cavity and the secondary circuit cavity are connected.

[0009] It is understandable that a single gas has limitations in terms of arc extinguishing speed, arc cooling capacity, and insulation recovery speed. Therefore, the present application fills the secondary circuit cavity with a second insulating gas. On the one hand, it can create a stable atmosphere environment for the secondary circuit to avoid short circuit or corrosion in the secondary circuit; on the other hand, by opening the ventilation system, the primary circuit cavity and the secondary circuit cavity can be connected, that is, the second insulating gas is mixed into the first insulating gas in the primary circuit cavity, thereby improving the arc extinguishing performance of the gas in the primary circuit cavity.

[0010] In an optional embodiment of the present application, the gas property includes at least one of the following: insulation performance, density, global warming coefficient, and stability. Optionally, the first insulating gas is nitrogen, and the second insulating gas is dry air. Optionally, a desiccant or an air dryer is also provided in the secondary circuit cavity to keep the secondary circuit cavity dry at all times.

[0011] In an optional embodiment of the present application, the ventilation system includes a first through hole arranged on the box piston, a second through hole arranged on the cover plate, and a cover plate rotating device; the cover plate rotating device is used to drive the cover plate to rotate around a central axis perpendicular to the cover plate; when the cover plate is rotated to a first position, the first through hole and the second through hole are staggered with each other, the first through hole is blocked by other parts of the cover plate, and the second through hole is blocked by other parts of the box piston; when the cover plate is rotated to a second position, the first through hole and the second through hole overlap, connecting the primary circuit cavity and the secondary circuit cavity.

[0012] In an optional embodiment of the present application, a first air flow port communicating with the outside is further provided on the secondary circuit cavity, and a first valve is provided on the first air flow port. The first valve is opened or closed under the control of the controller.

[0013] In an optional embodiment of the present application, the first valve includes: a stator assembly, a mover assembly and a ventilation blade; the stator assembly includes a stator ring and a drive coil embedded in the stator ring, the stator ring includes a cylindrical body, a cylindrical groove is provided on the front surface of the cylindrical body, so that the front surface is an annular surface, a plurality of reference columns are provided on the annular surface, a ventilation hole is provided at the bottom of the cylindrical groove, and the drive coil is embedded in the side of the cylindrical groove; the mover assembly includes a mover ring and a magnet embedded in the mover ring, the mover The ring is arranged in the cylindrical groove, the side wall of the movable ring is embedded with the magnet, and the magnet drives the movable ring to rotate in the cylindrical groove under the driving of the magnetic field of the driving coil, and a plurality of movable columns are arranged on the surface of the movable ring; each of the ventilation blades includes a reference hole and a sliding groove, each of the movable columns is inserted into the sliding groove and slides, and each of the reference columns passes through the reference hole corresponding to the ventilation blade, and the stator ring is fixed to the secondary circuit cavity through the reference column, and the stator ring surrounds the first air flow outlet.

[0014] In an optional embodiment of the present application, the above-mentioned complete ring main unit also includes a second gas box filled with a third insulating gas having gas properties different from those of the first insulating gas; a second air flow port is arranged between the second gas box and the first gas box, a second valve is arranged on the second air flow port, and the second valve performs an opening or closing operation under the control of the controller.

[0015] It can be understood that in order to further play the role of the mixed gas, the present application also adds a second gas box to accommodate the third insulating gas. When a mixed gas is needed, it can be quickly added to the primary circuit cavity to further improve the arc extinguishing performance of the mixed gas in the primary circuit cavity.

[0016] In an optional embodiment of the present application, the structure of the second valve is consistent with the structure of the first valve. Beneficial Effects

[0017] The present application proposes an environmentally friendly gas-insulated primary and secondary integrated ring main unit based on magnetron technology, the core of which is to separate the first gas box into a primary circuit cavity and a secondary circuit cavity through a box piston. The primary circuit cavity is filled with an environmentally friendly first insulating gas, and the secondary circuit is responsible for real-time monitoring of the status of the primary circuit equipment. When the controller detects an abnormality in the equipment and controls the circuit breaker to disconnect, it simultaneously drives the cover plate to push the box piston, compressing the volume of the primary circuit cavity, thereby increasing the gas pressure of the first insulating gas and enhancing its arc extinguishing performance. The present application dynamically adjusts the gas pressure in the primary circuit cavity through magnetron technology, effectively improving the insulation and arc extinguishing capabilities of the environmentally friendly gas, especially when dealing with strong arc extinguishing requirements, thereby ensuring the safety, stability and power supply continuity of the power grid.

[0018] In the present application, the secondary circuit cavity can also be filled with a second insulating gas different from the primary circuit cavity, and the two cavities can be optionally connected through a ventilation system. This design takes into account the limitations of a single gas in arc extinguishing and insulation performance. By filling the second insulating gas, not only a stable atmosphere is provided for the secondary circuit to prevent short circuits and corrosion, but also the two gases can be mixed through the ventilation system when necessary to improve the arc extinguishing performance of the gas in the primary circuit cavity.

[0019] In the present application, the above-mentioned complete set of ring network cabinets can also add a second gas box for filling a third insulating gas with different properties from the first insulating gas. The second gas box is connected to the first gas box through a second air flow port, and the air flow port is equipped with a second valve controlled by a controller. When a mixed gas is needed to improve the arc extinguishing performance of the primary circuit cavity, the controller can open the second valve to allow the third insulating gas in the second gas box to quickly flow into the first gas box and mix with the original first insulating gas. This design allows the ring network cabinet to flexibly adjust the gas composition when dealing with different working conditions, thereby optimizing the arc extinguishing effect.

[0020] In order to make the above-mentioned objects, features and advantages of the present application more obvious and understandable, optional embodiments are specifically listed below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a cross-sectional schematic diagram of an environmentally friendly gas-insulated primary and secondary fusion ring main unit based on magnetron technology provided by the present application; Figure 2 It is a schematic diagram of the first situation of the cover plate and the box piston in this application; Figure 3 It is a schematic diagram of the second situation of the cover plate and the box piston in the present application; Figure 4 It is a schematic diagram of the disassembly of the first valve in this application; Figure 5 is a schematic diagram of a stator assembly of the first valve in the present application; Figure 6 is a schematic diagram of a mover assembly of the first valve in the present application; Figure 7 is a schematic diagram of a plurality of ventilation blades in the present application in an open state; Figure 8 It is a schematic diagram of the closed state of multiple ventilation blades in this application. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0024] like Figure 1As shown, the present application provides an environmentally friendly gas-insulated primary-secondary integrated ring main unit based on magnetic control technology, comprising: a first gas box 1 for accommodating a circuit breaker and a controller for controlling the on and off of the circuit breaker, and a mechanism chamber 2 for accommodating the circuit breaker operating mechanism. A box piston 3 is arranged in the first gas box 1, and the box piston 3 divides the first gas box 1 into a closed primary circuit cavity 4 and a secondary circuit cavity 5; the primary circuit cavity 4 is used to set a primary circuit (not shown in the figure), and the secondary circuit cavity 5 is used to set a secondary circuit (not shown in the figure), and the primary circuit cavity 4 is filled with a first insulating gas; a cover plate 6 and a cover plate driving device 7 covering the box piston 3 are also arranged in the secondary circuit cavity 5, and the cover plate driving device 7 is used to drive the cover plate 6 to move in a direction perpendicular to the cover plate 6 under the control of the controller. The controller is used to control the cover plate driving device 7 to drive the cover plate to push the box piston 3 to compress the volume of the primary circuit cavity 4 while controlling the circuit breaker to disconnect.

[0025] The above-mentioned primary circuit, also known as the main circuit, is the circuit that directly participates in the conversion, transmission and distribution of electric energy in the power system. In the complete set of ring main unit, the primary circuit is mainly composed of primary equipment such as transformers, circuit breakers, load switches, disconnectors, fuses, capacitors, reactors, busbars, power cables, overhead lines, lightning arresters, and mutual inductors. It is responsible for transmitting electric energy from the power source to the power-consuming equipment to realize the conversion, transmission and distribution of electric energy.

[0026] The above-mentioned secondary circuit, also known as control circuit or secondary wiring, is a circuit used for monitoring, measuring, controlling, protecting and sending various signals in the power system. In a complete set of ring main unit, the secondary circuit is mainly composed of various relays, measuring instruments, meters, control switches, operating power supplies, control cables, control busbars and other secondary equipment. It is responsible for monitoring the operating status of the primary circuit, measuring electrical parameters, controlling the operation of the switchgear, and sending alarms or tripping signals to the above-mentioned controllers in the event of a fault or abnormality to protect the safety of the equipment and system.

[0027] The above-mentioned circuit breaker is an important control and protection device in the power system. It is set in the primary circuit and is used to cut off the circuit under the control of the controller in the event of a short circuit, overload or abnormality to protect the safety of the equipment and system. In a complete set of ring network cabinets, the circuit breaker is usually used in conjunction with the load switch to achieve control and protection of the circuit.

[0028] In the ring main unit, the working principle of the primary circuit mainly involves the flow and control of electric energy. For example, when the electric power enters the ring main unit from the power supply main, it is distributed and controlled by the load switch or circuit breaker to transmit the electric energy to each distribution branch or power-consuming equipment. Under normal circumstances, the load switch is used to operate the normal current, while the circuit breaker or fuse is used to cut off the circuit in abnormal situations such as short circuit or overload to protect the safety of equipment and system.

[0029] At the moment when the contacts in the circuit breaker separate, the distance between the contacts is small but the electric field strength is extremely high, causing the electrons on the contact surface to be pulled out by the electric field force to form free electrons. At the same time, the heating of the contacts intensifies, generating thermoelectric emission, further increasing the number of electrons. These electrons move at high speed under the action of the electric field, collide with the neutral points in the medium, and produce collision ionization, which eventually fills the contact gap with electrons and positive ions, forming a conductive channel, i.e., an arc. The high temperature can reach thousands of degrees, which can burn the contacts, melt the metal, and even cause the equipment to explode; the high voltage peak generated by the arc may damage the equipment; the strong light and heat radiation of the arc are harmful to human eyes and skin; the arc discharge may also interfere with or damage surrounding electronic equipment. Therefore, effective arc extinguishing measures must be considered in the design of circuit breakers.

[0030] It can be understood that the first insulating gas used in the ring network cabinet provided by the present application is an environmentally friendly gas such as nitrogen. Although it is superior to traditional SF6 gas in terms of environmental protection and safety, it is relatively weak in terms of insulation and arc extinguishing performance, and it is difficult to cope with situations with strong arc extinguishing capabilities. In the present application, the secondary circuit is used to detect the operating conditions of each device in the primary circuit in real time, and feedback to the controller when an abnormality is found in the equipment, and the controller controls the circuit breaker to disconnect accordingly. An arc may be generated when the circuit breaker is disconnected. Therefore, in the present application, the controller simultaneously controls the cover plate drive device to drive the cover plate to push the box piston to compress the volume of the primary circuit cavity, increase the air pressure of the first insulating gas in the primary circuit cavity, and thus enhance its arc extinguishing performance.

[0031] In an optional embodiment of the present application, the secondary circuit cavity 5 is filled with a second insulating gas, and the gas properties of the second insulating gas are different from those of the first insulating gas; a ventilation system is also arranged between the primary circuit cavity 4 and the secondary circuit cavity 5, and when the ventilation system is turned on, the primary circuit cavity 4 and the secondary circuit cavity 5 are connected.

[0032] It is understandable that a single gas has limitations in terms of arc extinguishing speed, arc cooling capacity, and insulation recovery speed. Therefore, the present application fills the secondary circuit cavity 5 with a second insulating gas. On the one hand, a stable atmosphere can be created for the secondary circuit to avoid short circuit or corrosion in the secondary circuit; on the other hand, by opening the ventilation system, the primary circuit cavity 4 and the secondary circuit cavity 5 can be connected, that is, the second insulating gas is mixed into the first insulating gas in the primary circuit cavity 4, thereby improving the arc extinguishing performance of the gas in the primary circuit cavity 4.

[0033] In an optional embodiment of the present application, the gas characteristics include at least one of the following: insulation performance, density, global warming coefficient, and stability. Optionally, the first insulating gas is nitrogen, and the second insulating gas is dry air; nitrogen alone has limitations in terms of arc extinguishing speed, arc cooling capacity, and insulation recovery speed. After adding dry air for mixing, its insulation / arc extinguishing ability can be better improved. Similar embodiments also include: the first insulating gas is nitrogen, and the second insulating gas is carbon dioxide; the first insulating gas is nitrogen, and the second insulating gas is nitrogen fluoride. Optionally, a desiccant or an air dryer is also provided in the secondary circuit cavity to keep the secondary circuit cavity dry at all times.

[0034] In an optional embodiment of the present application, if Figure 2 and Figure 3 As shown, the ventilation system includes a first through hole 8 provided on the box piston 3, a second through hole 9 provided on the cover plate 6, and a cover plate rotating device (not shown in the figure); the cover plate rotating device is used to drive the cover plate 6 to rotate around a central axis perpendicular to the cover plate 6. When the cover plate 6 rotates to the first position, as shown in FIG. Figure 2 As shown, the first through hole 8 and the second through hole 9 are offset from each other, the first through hole 8 is blocked by other parts of the cover plate 6, and the second through hole 9 is blocked by other parts of the box piston 3. At this time, the first insulating gas is not mixed with other gases. Figure 3 As shown, the first through hole 8 and the second through hole 9 overlap, connecting the primary circuit cavity 4 and the secondary circuit cavity 5, and the first insulating gas begins to mix into the second insulating gas.

[0035] In an optional embodiment of the present application, if Figure 1 As shown, the secondary circuit cavity 5 is also provided with a first air flow port 100 communicating with the outside, and the first air flow port 100 is provided with a first valve 10, and the first valve 10 is opened or closed under the control of the controller. It can be understood that when the cover plate driving device 7 and / or the cover plate rotating device are working, opening the first valve 10 is conducive to balancing the air pressure and facilitating the mixing of the gas in the primary circuit cavity.

[0036] In an optional embodiment of the present application, if Figure 4 As shown, the first valve 10 includes a stator assembly 11 , a mover assembly 12 and a plurality of ventilation vanes 13 .

[0037] like Figure 4 and Figure 5 As shown, the stator assembly 11 includes a stator ring 14 and a driving coil 15 embedded in the stator ring 14. The stator ring 14 includes a cylindrical body, a cylindrical groove is provided on the front surface of the cylindrical body, so that the front surface is an annular surface, a plurality of reference columns 16 are provided on the annular surface, and a vent hole 17 is provided at the bottom of the cylindrical groove. The driving coil 15 is embedded in the side of the cylindrical groove, as shown in FIG. Figure 5 In addition, the outer surface of the cylindrical body also includes a flexible circuit board 18 connected to the driving coil 15, so that the flexible circuit board 18 can drive the driving coil 15 to generate current under the control of the controller.

[0038] like Figure 4 and Figure 6 As shown, the mover assembly 12 includes a mover ring 19 and a magnet 20 embedded in the mover ring 19. The mover ring 19 is arranged in a cylindrical groove. The side wall of the mover ring 19 is embedded with the magnet 20. The magnet 20 drives the mover ring 19 to rotate in the cylindrical groove under the magnetic field of the driving coil 15. A plurality of mover columns 21 are arranged on the surface of the mover ring 19. Figure 6 As shown, the direction of the current on the driving coil 15 is counterclockwise, the magnet 20 includes a south pole (S pole) and a north pole (N pole), and the magnet 20 can be driven by the Ampere force to drive the mover ring 19 to rotate in the first direction a. It can be understood that the direction of the current on the driving coil 15 can be changed so that the magnet 20 can drive the rotor ring to rotate in the second direction b.

[0039] like Figure 7 and Figure 8 As shown, each ventilation blade 13 includes a reference hole 22 and a sliding groove 23, each movable column 21 is inserted into the sliding groove 23 to slide, each reference column 16 passes through the reference hole 22 of the corresponding ventilation blade 13, and the stator ring 14 is fixed to the secondary circuit cavity 5 through the reference column 16, and the stator ring 14 surrounds the first air flow port 100. Figure 7 and Figure 8 As shown, since the mover ring 19 rotates clockwise around the optical axis under the drive of the driving coil 15, the mover column 21 slides in its respective sliding groove 23, thereby driving each ventilation blade 13 to rotate around the rotating hole, gradually opening the air flow port. In an optional embodiment of the present application, if Figure 1 As shown, the above-mentioned complete ring main unit also includes a second gas box 24 filled with a third insulating gas having gas properties different from those of the first insulating gas; a second air flow port 25 is arranged between the second gas box 24 and the first gas box 1, and a second valve 26 is arranged on the second air flow port 25, and the second valve 26 performs an opening or closing operation under the control of the controller.

[0040] It can be understood that in order to further play the role of mixed gas, the present application also adds a second gas box 24 to accommodate the third insulating gas, which can be quickly added to the primary circuit cavity 4 when a mixed gas is needed, further improving the arc extinguishing performance of the mixed gas in the primary circuit cavity 4. In an optional embodiment of the present application, the structure of the second valve 26 is consistent with the structure of the first valve 10.

[0041] It should be understood that in the embodiments of the present invention, the controller may be a central processing unit (CPU), and the controller may also be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0042] The expressions "first", "second", "the first" or "the second" used in various embodiments of the present disclosure may modify various components regardless of order and / or importance, but these expressions do not limit the corresponding components. The above expressions are only configured for the purpose of distinguishing an element from other elements. For example, a first user device and a second user device represent different user devices, although both are user devices. For example, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element without departing from the scope of the present disclosure.

[0043] When one element (e.g., a first element) is referred to as being "(operably or communicatively) coupled" or "(operably or communicatively) coupled to" or "connected to" another element (e.g., a second element), it is understood that the one element is directly connected to the other element or the one element is indirectly connected to the other element via yet another element (e.g., a third element). Conversely, it is understood that when an element (e.g., a first element) is referred to as being "directly connected" or "directly coupled" to another element (the second element), no element (e.g., a third element) is interposed between the two.

[0044] It should be noted that, in this article, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "includes a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element. In addition, components, features, and elements with the same name in different embodiments of the present application may have the same meaning or different meanings, and their specific meanings need to be determined by their explanation in the specific embodiment or further combined with the context of the specific embodiment.

[0045] The above description is only an optional embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above invention concept. For example, the above features are replaced with the technical features with similar functions disclosed in this application (but not limited to) by each other.

[0046] As used herein, the words "if" and "if" may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)", depending on the context.

[0047] The above description is only an optional embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above invention concept. For example, the above features are replaced with the technical features with similar functions disclosed in this application (but not limited to) by each other.

[0048] The above description is only an optional embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An environmentally friendly gas-insulated primary and secondary fusion ring main unit based on magnetron technology, characterized in that: include: A first gas box for accommodating a circuit breaker and a controller for controlling the on and off of the circuit breaker, and a mechanism chamber for accommodating an operating mechanism of the circuit breaker; A box piston is provided in the first gas box, and the box piston divides the first gas box into a closed primary circuit cavity and a secondary circuit cavity; the primary circuit cavity is used to set the primary circuit, and the secondary circuit cavity is used to set the secondary circuit, and the primary circuit cavity is filled with a first insulating gas; a cover plate covering the box piston and a cover plate driving device are also provided in the secondary circuit cavity, and the cover plate driving device is used to drive the cover plate to move in a direction perpendicular to the cover plate under the control of the controller; The controller is used to control the cover plate driving device to drive the cover plate to push the box piston to compress the volume of the primary circuit cavity while controlling the circuit breaker to disconnect.

2. According to the environmentally friendly gas insulated primary and secondary fusion ring main unit based on magnetron technology according to claim 1, it is characterized in that: The secondary circuit cavity is filled with a second insulating gas, and the gas properties of the second insulating gas are different from those of the first insulating gas; A ventilation system is also provided between the primary circuit cavity and the secondary circuit cavity. When the ventilation system is turned on, the primary circuit cavity and the secondary circuit cavity are connected.

3. The environmentally friendly gas-insulated primary and secondary fusion ring main unit based on magnetron technology according to claim 2 is characterized in that: The ventilation system comprises a first through hole provided on the box piston, a second through hole provided on the cover plate, and a cover plate rotating device; The cover plate rotating device is used to drive the cover plate to rotate around a central axis perpendicular to the cover plate; when the cover plate rotates to a first position, the first through hole and the second through hole are staggered with each other, the first through hole is blocked by other parts of the cover plate, and the second through hole is blocked by other parts of the box piston; when the cover plate rotates to a second position, the first through hole and the second through hole overlap, connecting the primary circuit cavity and the secondary circuit cavity.

4. The environmentally friendly gas insulated primary and secondary fusion ring main unit based on magnetron technology according to claim 3 is characterized in that: The secondary circuit cavity is also provided with a first air flow port communicating with the outside, and a first valve is arranged on the first air flow port. The first valve is opened or closed under the control of the controller.

5. The environmentally friendly gas insulated primary and secondary fusion ring main unit based on magnetron technology according to claim 4 is characterized in that: The first valve comprises: a stator assembly, a mover assembly and a ventilation blade; The stator assembly comprises a stator ring and a driving coil embedded in the stator ring, the stator ring comprises a cylindrical body, a cylindrical groove is provided on the front surface of the cylindrical body, so that the front surface is an annular surface, a plurality of reference columns are provided on the annular surface, a vent hole is provided on the bottom of the cylindrical groove, and the driving coil is embedded in the side surface of the cylindrical groove; The mover assembly comprises a mover ring and a magnet embedded in the mover ring, the mover ring is arranged in the cylindrical groove, the side wall of the mover ring is embedded with the magnet, the magnet drives the mover ring to rotate in the cylindrical groove under the driving of the magnetic field of the driving coil, and a plurality of mover columns are arranged on the surface of the mover ring; Each of the ventilation blades includes a reference hole and a sliding groove, each of the movable columns is inserted into the sliding groove and slides, each of the reference columns passes through the reference hole corresponding to the ventilation blade, the stator ring is fixed to the secondary circuit cavity through the reference column, and the stator ring surrounds the first air flow port.

6. The environmentally friendly gas insulated primary and secondary fusion ring main unit based on magnetron technology according to claim 5 is characterized in that: Also included is a second gas box filled with a third insulating gas having gas properties different from those of the first insulating gas; A second air flow port is provided between the second air box and the first air box, a second valve is provided on the second air flow port, and the second valve performs an opening or closing operation under the control of the controller.

7. The environmentally friendly gas-insulated primary and secondary fusion ring main unit based on magnetron technology according to claim 6 is characterized in that: The structure of the second valve is consistent with that of the first valve.

8. The environmentally friendly gas-insulated primary and secondary fusion ring main unit based on magnetron technology according to any one of claims 2 to 7, characterized in that: The gas properties include at least one of the following: insulation performance, density, global warming coefficient, and stability.

9. The environmentally friendly gas insulated primary and secondary fusion ring main unit based on magnetron technology according to claim 8 is characterized in that: The first insulating gas is nitrogen, and the second insulating gas is dry air.

10. The environmentally friendly gas insulated primary and secondary fusion ring main unit based on magnetron technology according to claim 9 is characterized in that: A desiccant or an air dryer is also provided in the secondary circuit cavity.

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