CN114013294A - High-voltage electrical appliance box - Google Patents
High-voltage electrical appliance box Download PDFInfo
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- CN114013294A CN114013294A CN202111214618.4A CN202111214618A CN114013294A CN 114013294 A CN114013294 A CN 114013294A CN 202111214618 A CN202111214618 A CN 202111214618A CN 114013294 A CN114013294 A CN 114013294A
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- train
- traction
- branch
- auxiliary
- pantograph
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- 229910052802 copper Inorganic materials 0.000 description 5
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- 238000012423 maintenance Methods 0.000 description 5
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- 238000012545 processing Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L9/00—Electric propulsion with power supply external to the vehicle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L1/00—Supplying electric power to auxiliary equipment of vehicles
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/18—Disposition or arrangement of fuses
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/46—Boxes; Parts thereof or accessories therefor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention discloses a high-voltage electrical box, comprising: a box body; the fixed part and the reserved part are arranged in the box body; the inherent part comprises a three-position switch, the three-position switch works at a first position when a train runs, and a circuit contained in the inherent part is divided into a traction branch and an auxiliary branch when a pantograph of the train is in a normal state; the traction branch is used for supplying power to a traction unit on the train; the auxiliary branch is used for supplying power to an auxiliary unit on the train; and after the reserved part is provided with corresponding electrical elements, the reserved part and part of the electrical elements in the traction branch form an emergency branch together, and the emergency branch is used for supplying power to the traction unit on the train emergently when the pantograph of the train breaks down.
Description
Technical Field
The invention relates to the technical field of high-voltage electrical appliance protection, in particular to a high-voltage electrical appliance box.
Background
In the rail transit industry, high-voltage electrical equipment is generally used for protecting a traction system of a train. In the related art, the front end of the traction converter is protected by a high-voltage electrical box, so that the high-voltage electrical box is an important component of a traction system. In addition, because the space at the bottom of the train is limited, a high-voltage electrical box with reasonable internal layout is urgently needed to meet the requirements of main circuit connection, electrical insulation performance and maintainability in the limited space at the bottom of the train.
Disclosure of Invention
In view of the above, the main object of the present invention is to provide a high voltage electrical box, which is reasonably arranged in the high voltage electrical box, so that the overall size of the high voltage electrical box is reduced, and the high voltage electrical box can be applied to different application scenarios.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
in a first aspect, an embodiment of the present invention provides a high-voltage electrical box, including:
a box body;
the fixed part and the reserved part are arranged in the box body; wherein,
the inherent part comprises a three-position switch, the three-position switch works at a first position when the train runs, and a circuit contained in the inherent part is divided into a traction branch and an auxiliary branch when a pantograph of the train is in a normal state; the traction branch is used for supplying power to a traction unit on the train; the auxiliary branch is used for supplying power to an auxiliary unit on the train;
and after the reserved part is provided with corresponding electrical elements, the reserved part and part of the electrical elements in the traction branch form an emergency branch together, and the emergency branch is used for supplying power to the traction unit on the train emergently when the pantograph of the train breaks down.
In the scheme, when the train runs, the pantograph position contact of the three-position switch is respectively electrically connected with the traction contact and the auxiliary contact, so that the three-position switch works at a first position;
when a pantograph of the train is in a normal state, the pantograph position contact, a first sub-traction contact contained in the traction contact and a first high-speed circuit breaker are sequentially and electrically connected to form a first sub-traction branch so as to supply power to a traction unit of a first type carriage on the train; the pantograph, the pantograph position contact, a second sub-traction contact contained in the traction contact point and a second high-speed circuit breaker are sequentially and electrically connected to form a second sub-traction branch circuit, so that power is supplied to a traction unit of a second type carriage on the train;
the pantograph, the pantograph position contact, the auxiliary contact and the three-way fuse are connected and electrically connected in sequence to form an auxiliary branch circuit which supplies power to an auxiliary unit on the train; the auxiliary unit comprises an auxiliary bus, an auxiliary converter of a third type of compartment on the train, and an auxiliary converter of the first type of compartment;
wherein the first type of car is a car without a pantograph; the second type carriage is a carriage with a pantograph; the third type carriage is a carriage with a cab.
In the above scheme, when the train is not provided with emergency traction measures, the reserved part needs to be provided with corresponding electrical components, where the corresponding electrical components include an anti-reverse diode and an emergency contactor, a cathode of the anti-reverse diode is electrically connected with the first high-speed circuit breaker or the second high-speed circuit breaker, an anode of the anti-reverse diode is electrically connected with the emergency contactor, and the emergency contactor is electrically connected with a storage battery to form the emergency branch; when the pantograph of train breaks down, excision first high speed circuit breaker or the high speed circuit breaker of second closes emergency contactor to break off first sub-traction branch road or the sub-traction branch road of second communicates emergency branch road adopts the battery does on the train first type carriage or the traction unit power supply in second type carriage.
In the above solution, the auxiliary branch further includes an isolation diode, located between the auxiliary contact and the three-way fuse, for isolating the pantograph from the auxiliary unit in the auxiliary branch.
In the above scheme, the auxiliary branch further includes an absorption resistor and an absorption capacitor, and the absorption resistor and the absorption capacitor are connected in series and then connected in parallel with the isolation diode.
In the above scheme, the box body is further provided with a workshop power interface, which is electrically connected with the workshop contact of the three-position switch, and is used for externally connecting power supply equipment to supply power to each equipment needing debugging on the train when the train is debugged in the garage.
In the scheme, the three-position switch and the workshop power interface are arranged in the right area in the box body along the length direction of the train; the first high-speed circuit breaker and the second-height circuit breaker are arranged in the box body and along the left area of the vehicle length direction.
In the above scheme, a guide rail is arranged at the bottom of the box body corresponding to the three-position switch.
In the scheme, the box body comprises a main frame and a thin plate, wherein the main frame is formed by welding stainless steel rectangular pipes into a U-shaped beam, and the thin plate is used for sealing the main frame; and a door cover plate is arranged at the position of the box body corresponding to the three-position switch and is used for isolating the three-position switch from the external environment of the high-voltage electric appliance box.
In the above scheme, the box body further comprises a mounting bracket; the mounting bracket comprises an extension square pipe, a lifting lug and a supporting rod; wherein;
the extension square tube is positioned on the top end face of the box body and extends along the length direction of the train;
the lifting lug is connected with the end, far away from the box body, of the extending square pipe, so that the high-voltage electrical box can be conveniently installed at the bottom of the train body;
one end of the supporting rod is fixed on the box body, the other end of the supporting rod is fixed on the extension square tube, and the supporting rod reinforces the support of the box body.
The embodiment of the invention provides a high-voltage electrical box, which comprises: a box body; the fixed part and the reserved part are arranged in the box body; the inherent part comprises a three-position switch, the three-position switch works at a first position when a train runs, and a circuit contained in the inherent part is divided into a traction branch and an auxiliary branch when a pantograph of the train is in a normal state; the traction branch is used for supplying power to a traction unit on the train; the auxiliary branch is used for supplying power to an auxiliary unit on the train; and after the reserved part is provided with corresponding electrical elements, the reserved part and part of the electrical elements in the traction branch form an emergency branch together, and the emergency branch is used for supplying power to the traction unit on the train emergently when the pantograph of the train breaks down. According to the high-voltage electric box provided by the invention, the inherent part and the reserved part are arranged in the box body, the built-in three-position switch is arranged on the inherent part, so that double protection of switching of three positions is realized, and the reserved positions where external wiring is finished are arranged in the box body, after corresponding electric elements are installed, the reserved positions and part of electric elements of the traction branch circuit form an emergency branch circuit, so that emergency traction can be realized when a pantograph of a train breaks down.
Drawings
Fig. 1 is a schematic structural diagram of a high-voltage electrical box according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a circuit connection in a high voltage electrical box according to an embodiment of the present invention;
fig. 3 is a schematic front view of a high-voltage electrical box according to an embodiment of the present invention after a door is opened;
FIG. 4 is a schematic structural view of the high-voltage electrical box shown in FIG. 3 along a section A-A in a counterclockwise direction;
FIG. 5 is a schematic structural view of the high voltage electrical box shown in FIG. 3 taken along the B-B section;
fig. 6 is a left side view schematic structural diagram of a high-voltage electrical box according to an embodiment of the present invention;
fig. 7 is a schematic right-view structural diagram of a high-voltage electrical box according to an embodiment of the present invention.
Detailed Description
Various embodiments of the present invention are described in more detail below with reference to the accompanying drawings. Other embodiments that are variations of any of the disclosed embodiments may be formed by differently configuring or arranging the elements and features of the present invention. Accordingly, the present invention is not limited to the embodiments set forth herein. Rather, the described embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. It should be noted that references to "an embodiment," "another embodiment," and the like do not necessarily refer to only one embodiment, and different references to any such phrases are not necessarily referring to the same embodiment. It will be understood that, although the terms first, second, third, etc. may be used herein to identify various elements, these elements are not limited by these terms. These terms are used to distinguish one element from another element having the same or similar designation. Thus, a first element in one embodiment may also be referred to as a second or third element in another embodiment without departing from the spirit and scope of the present invention.
The drawings are not necessarily to scale and, in some instances, may be exaggerated in scale to clearly illustrate features of embodiments. When an element is referred to as being connected or coupled to another element, it will be understood that the former may be directly connected or coupled to the latter, or may be electrically connected or coupled to the latter via one or more intervening elements therebetween. In addition, it will also be understood that when an element is referred to as being "between" two elements, it can be the only element between the two elements, or one or more intervening elements may also be present.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The articles "a" and/or "an" as used herein in the appended claims should be construed to mean "one or more" unless specified otherwise or clear from context to be directed to a singular form. It will be further understood that the terms "comprises," "comprising," "includes" and "including," when used in this specification, specify the presence of stated elements and do not preclude the presence or addition of one or more other elements. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items. Unless defined otherwise, all terms including technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs in view of the present invention. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the present invention and the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, and the present invention may be practiced without some or all of these specific details. In other instances, well known process structures and/or processes have not been described in detail in order to not unnecessarily obscure the present invention. It will also be understood that, in some instances, features or elements described in connection with one embodiment may be used alone or in combination with other features or elements of another embodiment, unless specifically stated otherwise, as would be apparent to one skilled in the relevant art. Hereinafter, various embodiments of the present invention are described in detail with reference to the accompanying drawings. The following description focuses on details to facilitate an understanding of embodiments of the invention. Well-known technical details may be omitted so as not to obscure the features and aspects of the present invention.
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a schematic structural diagram of a high-voltage electrical box according to an embodiment of the present invention.
In fig. 1, the high-voltage electrical box 1 includes:
a case 10;
an intrinsic portion 101 and a reserve portion 102 provided in the case 10; wherein,
the inherent part 101 comprises a three-position switch, when a train runs, the three-position switch works at a first position, and when a pantograph of the train is in a normal state, a circuit contained in the inherent part is divided into a traction branch and an auxiliary branch; the traction branch is used for supplying power to a traction unit on the train; the auxiliary branch is used for supplying power to an auxiliary unit on the train;
the external connection of the reserved portion 102 is completed, and after the reserved portion is installed with corresponding electrical components, the external connection and a part of electrical components in the traction branch form an emergency branch together, so as to provide emergency power for the traction unit on the train when the pantograph of the train fails.
It should be noted that, an application scenario of the high-voltage electrical box provided by the embodiment of the present invention may be on a train of rail transit, and therefore, the three-position switch herein is configured to have three working positions: the system comprises a pantograph position, a secondary position and a vehicle position, wherein when the train is in a running state, the three-position switch works at a pantograph station; when the train is overhauled in the garage, the three-position switch works in a grounding position so as to ensure the safety of the overhauling personnel and the electrical equipment by the electrical equipment and the main power supply which need to be overhauled; when the train is debugged in the garage, the three-position switch works at a workshop position and is used for connecting the electrical equipment to be debugged with an external power supply so that the electrical equipment to be debugged can obtain the debugging power supply provided by the external power supply. Here, the first position is the three-position switch operating in the pantograph position.
In some embodiments, the three-position switch may have 7 contacts, two operating contacts, two ground contacts, a shop potential contact, a traction contact, and an auxiliary contact, and in embodiments of the present invention, the two operating contacts are specifically configured as two pantograph potential contacts, i.e., electrically connected to a 1500 volt (V) pantograph, it being understood that the operating contacts are configured to function differently, i.e., the connected electrical components are connected to different voltages, under different usage scenarios.
In the embodiment of the invention, specifically, when a train runs, the pantograph position contact of the three-position switch is respectively electrically connected with the traction contact and the auxiliary contact, so that the three-position switch works at a first position;
when a pantograph of the train is in a normal state, the pantograph position contact, a first sub-traction contact contained in the traction contact and a first high-speed circuit breaker are sequentially and electrically connected to form a first sub-traction branch so as to supply power to a traction unit of a first type carriage on the train; the pantograph, the pantograph position contact, a second sub-traction contact contained in the traction contact point and a second high-speed circuit breaker are sequentially and electrically connected to form a second sub-traction branch circuit, so that power is supplied to a traction unit of a second type carriage on the train;
the pantograph, the pantograph position contact, the auxiliary contact and the three-way fuse are connected and electrically connected in sequence to form an auxiliary branch circuit which supplies power to an auxiliary unit on the train; the auxiliary unit comprises an auxiliary bus, an auxiliary converter of a third type of compartment on the train, and an auxiliary converter of the first type of compartment; wherein the first type of car is a car without a pantograph; the second type carriage is a carriage with a pantograph; the third type carriage is a carriage with a cab.
It is described how the circuit contained in the intrinsic part of the tank supplies the traction system and the auxiliary system of the train, respectively, when the train is in operation and the pantograph of the train is in the normal position. Specifically, after the train gets power from the pantograph, the train enters a high-voltage electrical box through a main fuse box, and a circuit included in the inherent part is divided into a traction part and an auxiliary part in the high-voltage electrical box through the three-position switch, wherein the traction part is also the traction branch, the traction branch can include a first sub-traction branch and a second sub-traction branch, and the first sub-traction branch can supply power to a traction unit of a first type of carriage on the train; the second sub-traction leg may provide power to a traction unit of a second type of car on the train; it should be noted that the above is only an example, and the two sub-traction branches specifically supply power to the traction converter of which type of car, and may also be modified in combination with the layout of the whole car. The first type of car can also be represented by an M car; the second type of car may also be denoted Mp car.
For an auxiliary leg, in some embodiments, the auxiliary leg further comprises an isolation diode located between the auxiliary contact and the three-way fuse for isolating the pantograph from the auxiliary unit on the auxiliary leg.
In other embodiments, the auxiliary branch further includes an absorption resistor and an absorption capacitor, and the absorption resistor and the absorption capacitor are connected in series and then connected in parallel with the isolation diode.
It should be noted that the isolation diode is used to prevent the electrical signal on the auxiliary unit from flowing back to the pantograph when the pantograph fails. The absorption resistor and the absorption capacitor can be used for absorbing energy released when the isolation diode is turned off.
The high-voltage electrical box provided by the embodiment of the invention is further designed with a reserved part, wherein the reserved part can be used as an optional part, whether the reserved part is needed or not is determined according to the configuration of the whole train, that is, in some embodiments, when the train is not provided with emergency traction measures, the reserved part can realize emergency traction only by installing corresponding electrical elements, wherein the corresponding electrical elements comprise an anti-reverse diode and an emergency contactor, the cathode of the anti-reverse diode is electrically connected with the first high-speed circuit breaker or the second high-speed circuit breaker, the anode of the anti-reverse diode is electrically connected with the emergency contactor, and the emergency contactor is electrically connected with a storage battery to form an emergency branch; when the pantograph of train breaks down, excision first high speed circuit breaker or the high speed circuit breaker of second closes emergency contactor to break off first sub-traction branch road or the sub-traction branch road of second communicates emergency branch road adopts the battery does on the train first type carriage or the traction unit power supply in second type carriage.
It should be understood that the emergency traction is to at least tow the train to the next station when the pantograph of the train fails, and therefore, the emergency branch does not need to be provided on both sub-traction branches, but only on one sub-traction branch. I.e. in combination with the first sub-traction branch arrangement, or in combination with the second sub-traction branch arrangement.
The above description describes the working principle of the mutual cooperation between the electrical components in the high-voltage electrical box when the train is running, and it is to be understood that the train needs to be debugged just before delivery running, at this time, in some embodiments, the box body is further provided with a workshop power interface, which is electrically connected with the workshop position contact of the three-position switch, and is used for externally connecting a power supply device to supply power to each device needing to be debugged on the train when the train is debugged in the garage.
That is to say, when the train debugs in the garage, this moment the three-position switch, work in the second position, that is: in the vehicle-mounted position, specifically, outside the high-voltage electrical box, external power supply equipment accesses external electric energy into the high-voltage electrical box through the power interface of the vehicle; and a workshop position contact of the three-position switch in the high-voltage electrical box is connected with a traction contact or an auxiliary contact to debug and supply power to the traction unit or the auxiliary unit.
The three-dimensional value switch, the high-speed circuit breaker and the workshop power interface in the high-voltage electrical box provided by the embodiment of the invention are often required to be operated and maintained, and electrical elements in the length direction of a train are relatively easy to detach and maintain, wherein the length direction of the train is also the running direction of the train, so that in some embodiments, the three-position switch and the workshop power interface are arranged in the right area of the box body along the length direction of the train; the first high-speed circuit breaker and the second-height circuit breaker are arranged in the box body and along the left area of the vehicle length direction.
In some embodiments, a guide rail is arranged at the bottom of the box body at a position corresponding to the three-position switch.
It should be noted that the guide rail is provided to facilitate the removal and maintenance of the three-position switch.
In some embodiments, the box body comprises a main frame welded into a U-shaped beam by using stainless steel rectangular pipes, and a thin plate for sealing the main frame; and a door cover plate is arranged at the position of the box body corresponding to the three-position switch and is used for isolating the three-position switch from the external environment of the high-voltage electric appliance box.
The box body main body framework adopts a stainless steel rectangular pipe and a U-shaped beam, the light weight of materials is considered, and the door cover plate is made of aluminum alloy plates. The main frame plays a role in bearing and force transmission, and the box body is dragged under a train by the lifting lugs through welding the stainless steel rectangular tube and the U-shaped beam; all the electric element parts are arranged on the U-shaped beam, and the upper, lower, left and right peripheries of the box body are welded and sealed by thin plates.
The arrangement of the door cover plate ensures that the three-position switch of the high-voltage electrical appliance box has double protection, and when the three-position switch needs to be switched, the door cover needs to be opened, so that the switching of different working positions can be carried out by operating the knob lock, namely the door cover is protected for one time; the knob lock of the three-position switch is another protection.
In some embodiments, the case further comprises a mounting bracket; the mounting bracket comprises an extension square pipe, a lifting lug and a supporting rod; wherein;
the extension square tube is positioned on the top end face of the box body and extends along the length direction of the train;
the lifting lug is connected with the end, far away from the box body, of the extending square pipe, so that the high-voltage electrical box can be conveniently installed at the bottom of the train body;
one end of the supporting rod is fixed on the box body, the other end of the supporting rod is fixed on the extension square tube, and the supporting rod reinforces the support of the box body.
It should be noted that the standard subway is towed by a large side beam under the train, the high-voltage electric box is conveniently installed at the bottom of the train body through a square tube and a lifting lug extending out of two ends, and different types of trains can be matched by changing the length of the square tube. The support of the box body is enhanced by the support rod to counteract the gravity of a part of the box body.
In addition, in terms of layout, the anti-reverse or isolation diode in the high-voltage electrical appliance box can adopt natural cooling, and can be laid on the right side plate of the box body; the radiator arranged in the high-voltage electrical box is arranged on the outer side plate of the high-voltage electrical box. The emergency contactor, the absorption resistor and the absorption capacitor are distributed at the bottom of the middle of the box body on the emergency branch. The three-way fuse is distributed at the top of the middle of the box body. The three-position switch, the high-speed circuit breaker and the like in the high-voltage electrical box are all high-power and high-current devices, copper bars are adopted for electric connection among the high-voltage electrical box, and circuit connection design is carried out by calculating the current carrying of the copper bars, the lap joint area of the joints and the like. The auxiliary and emergency traction part has small current and is electrically connected through reasonable cable laying. The high-voltage electrical box inlet and outlet wire ends are arranged in the middle areas of the top plates on the two sides of the box body, the low-voltage control connector end is arranged in the right area of the top plate of the box body, the high-voltage circuit is mainly laid on the top of the box body, and the low-voltage circuit is mainly laid on the bottom of the box body, so that the electromagnetic compatibility and the reliability of equipment are improved. The three-position isolating switch is provided with 8 fastening point positions, the front panel is fastened through 4 bolts, the two sides of the rear portion are fastened through two points of bolts, and a small guide rail is designed at the corresponding position of the box body at the bottom of the three-position bolt, so that the switch is convenient to disassemble and assemble, and is convenient to maintain.
For understanding the structure and the working principle of the high-voltage electrical box provided by the embodiment of the invention, reference is made to fig. 2 to 7. Fig. 2 is a schematic circuit structure diagram of a high-voltage electrical box according to an embodiment of the present invention;
fig. 3 is a schematic front view of a high-voltage electrical box according to an embodiment of the present invention after a door is opened; FIG. 4 is a schematic structural view of the high-voltage electrical box shown in FIG. 3 along a section A-A in a counterclockwise direction; FIG. 5 is a schematic structural view of the high voltage electrical box shown in FIG. 3 taken along the B-B section; fig. 6 is a left side view schematic structural diagram of a high-voltage electrical box according to an embodiment of the present invention; fig. 7 is a schematic right-view structural diagram of a high-voltage electrical box according to an embodiment of the present invention.
In fig. 2, electrical symbols from left to right indicate: WXP is a workshop power interface; HS1-HS4 are fuses in the main fuse box, and 1500V three-phase four-wire electricity is externally connected with the fuses; MQS is a three-position switch; NE is a grounding wire; CAD/RAD are absorption capacitance and absorption resistance respectively; AD1 is an isolation diode; HB1/HB2 are a first high-speed circuit breaker and a second high-speed circuit breaker, respectively; the AD2 is an anti-reverse diode; the KMB is an emergency contactor; AF1-AF3 are three-way fuses; HV, HF1-HF2 are identification symbols of external wiring corresponding to the three fuses in the high-voltage electrical box; SIV is an auxiliary converter; HA1-HA2 is an identifier of an external connection corresponding to a second high-speed circuit breaker in the high-voltage electrical appliance box; HB1-HB2 is an identification symbol of an external connection corresponding to a first high-speed circuit breaker in the high-voltage electrical appliance box; INV is a traction converter; HC1-HC3 are identification symbols of external wiring corresponding to emergency traction in the high-voltage electrical box.
Note that, in fig. 3, XS indicates a rotation direction of the three-position switch. In fig. 4, the terminal block assemblies 1-4 are used for connecting electrical connection lines to electrically connect components in the high-voltage electrical box. In fig. 5 to 7, 1 is a shop power outlet; 2 is a diode component used for realizing an isolation diode and an anti-reversion diode; 3 is a first high-speed circuit breaker; 4 is a second high-speed circuit breaker; 5 is an absorption resistor; 6 is an absorption capacitor; 7 is an emergency contactor 1; 8 is an emergency contactor 2, wherein 7 and 8 are applied to an emergency branch together; 9 is a copper bar; 10 is a high break contactor, current limiting resistance assembly, used for control of high speed circuit breaker, which is a contactor driving coils in the high speed circuit breaker; the high-voltage circuit breaker is characterized in that the high-voltage circuit breaker is a high-breaking insulation shield 11 and is used for electrical isolation when the high-voltage circuit breaker adopts constant-voltage arc extinction for overcurrent breaking protection so as to ensure the safety of a high-voltage electrical box; 12 is a box body; 13 is a door cover plate; 14 is a lifting lug; 15 is a control connector; 16 is a support rod used for strengthening the support of the high-voltage electric box body; 17 is an extension square pipe hanging beam; and 18 is a three-position switch.
With reference to the foregoing drawings 2 to 7, after the high-voltage electrical apparatus box provided by the embodiment of the present invention takes power from the pantograph, the power enters the high-voltage electrical apparatus box provided by the embodiment of the present invention through the main fuse box, and the circuit is divided into two parts by the three-position switch: a traction portion and an auxiliary portion; the traction part is directly connected to two high-speed circuit breakers in a shunting mode, one path of the traction part is output to the M vehicle traction inverter, and the other path of the traction part is output to the Mp vehicle traction inverter; the auxiliary part outputs current through three fuses through an isolating diode, wherein one circuit of the current goes to an auxiliary bus, the other circuit of the current goes to the Tc vehicle auxiliary converter, and the other circuit of the current goes to the M vehicle auxiliary converter; in addition, combine to draw the partial components and parts of branch road, still be provided with emergent traction part in the high-voltage apparatus case: the power is distributed from the high-speed circuit breaker 1, and is output through an isolation diode (also called a reverse diode) and an emergency contactor to supply power to an emergency storage battery of the Tc vehicle, and the specific layout of the interior of a hardware high-voltage electric appliance box is shown in the following figure 7.
In the practical application process, the standard subway is towed by a large side beam under a vehicle, at the moment, the high-voltage electrical box provided by the embodiment of the invention is conveniently installed at the bottom of the vehicle body through the extending square pipe and the lifting lug which extend out of two ends, and different vehicle types can be matched by changing the length of the square pipe.
In addition, the main frame of the box body of the high-voltage electrical box provided by the embodiment of the invention can adopt a stainless steel rectangular tube and U-shaped beam form, and the door cover plate can adopt an aluminum alloy plate in consideration of light weight of materials, wherein the main frame plays a role in bearing and force transmission, and the device is supported under a vehicle by a lifting lug through welding the stainless steel rectangular tube and the U-shaped beam; all parts are arranged on the U-shaped beam, and the box body of the high-voltage electrical box is welded and sealed by thin plates in the up-down, left-right and around-circle directions.
In the practical application process, the maintenance space of the subway train mainly comes from, for example, a three-position switch, a high-speed circuit breaker and a workshop power supply which need to be operated and maintained frequently, and the direction convenient for maintenance is the direction of the length of the train, so that, referring to fig. 7, two high-speed circuit breakers in the high-voltage electric box provided by the embodiment of the invention are arranged on the left side of the box body side by side; the three-position switch and the workshop power supply are distributed in the right area of the cabinet body in the vehicle length direction; the diodes are naturally cooled and are distributed on the side plate at the right side of the cabinet body, and the radiator is arranged on the outer side to meet the radiating requirement; the emergency traction, the absorption resistor and the absorption capacitor are distributed at the bottom of the middle of the cabinet body, and the fuse is distributed at the top of the middle of the cabinet body.
In addition, three-position switches, high-speed circuit breakers and the like in the high-voltage electrical box are high-power and high-current devices, copper bars are adopted for electric connection among the high-voltage electrical box and the high-speed circuit breakers, and circuit connection design is carried out by calculating current carrying of the copper bars, lap joint areas of joints and the like. The auxiliary and emergency traction part has small current and is electrically connected through reasonable cable laying. The high-voltage electrical box inlet and outlet wire ends are arranged in the middle areas of the top plates on the two sides of the box body, the low-voltage control connector end is arranged in the right area of the top plate of the box body, the high-voltage circuit is mainly laid on the top of the box body, and the low-voltage circuit is mainly laid on the bottom of the box body, so that the electromagnetic compatibility and the reliability of equipment are improved. The three-position isolating switch is provided with 8 fastening points, the front panel is fastened through 4 bolts (in the X direction, as shown in figure 3), the two sides of the rear portion are fastened through two bolts (in the Y direction, as shown in figure 5), and a small guide rail is designed at the corresponding position of the box body at the bottom of the three-position bolt, so that the switch is convenient to disassemble and assemble, and the maintenance is convenient.
Compared with the prior art, the high-voltage electrical box provided by the invention has the beneficial effects that:
1. the traction system has the advantages of compact structure, reasonable layout and high integration level, realizes the protection of a main circuit of the traction system in a limited space, realizes the mutual switching of three working states of a pantograph position, a grounding position and a workshop position of a vehicle, protects main circuit equipment of an auxiliary system, reserves emergency traction and the like, meets the development requirement of high integration level of traction equipment, reduces the number of boxes and reduces the production cost.
2. Each functional unit installation is independent each other in the high-voltage apparatus case, does not influence each other, satisfies the modular design principle, and equipment, dismantlement are convenient, improve production efficiency and overhaul, maintenance efficiency.
3. The whole equipment adopts a new integration mode, the high-voltage part in the traction system is independent of the traction inverter, the high-voltage line in the traction inverter is reduced, and the interference to a control signal is reduced.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above-described device embodiments are merely illustrative, for example, the division of the unit is only a logical functional division, and there may be other division ways in actual implementation, such as: multiple units or components may be combined, or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the coupling, direct coupling or communication connection between the components shown or discussed may be through some interfaces, and the indirect coupling or communication connection between the devices or units may be electrical, mechanical or other forms. The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed on a plurality of network units; some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment. In addition, all the functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may be separately regarded as one unit, or two or more units may be integrated into one unit; the integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (10)
1. A high-voltage electrical box, comprising:
a box body;
the fixed part and the reserved part are arranged in the box body; wherein,
the inherent part comprises a three-position switch, the three-position switch works at a first position when the train runs, and a circuit contained in the inherent part is divided into a traction branch and an auxiliary branch when a pantograph of the train is in a normal state; the traction branch is used for supplying power to a traction unit on the train; the auxiliary branch is used for supplying power to an auxiliary unit on the train;
and after the reserved part is provided with corresponding electrical elements, the reserved part and part of the electrical elements in the traction branch form an emergency branch together, and the emergency branch is used for supplying power to the traction unit on the train emergently when the pantograph of the train breaks down.
2. The high-voltage electrical box according to claim 1, wherein, when the train is running, the pantograph position contact of the three-position switch is electrically connected with the traction contact and the auxiliary contact respectively, so that the three-position switch works in the first position;
when a pantograph of the train is in a normal state, the pantograph position contact, a first sub-traction contact contained in the traction contact and a first high-speed circuit breaker are sequentially and electrically connected to form a first sub-traction branch so as to supply power to a traction unit of a first type carriage on the train; the pantograph, the pantograph position contact, a second sub-traction contact contained in the traction contact point and a second high-speed circuit breaker are sequentially and electrically connected to form a second sub-traction branch circuit, so that power is supplied to a traction unit of a second type carriage on the train;
the pantograph, the pantograph position contact, the auxiliary contact and the three-way fuse are connected and electrically connected in sequence to form an auxiliary branch circuit which supplies power to an auxiliary unit on the train; the auxiliary unit comprises an auxiliary bus, an auxiliary converter of a third type of compartment on the train, and an auxiliary converter of the first type of compartment;
wherein the first type of car is a car without a pantograph; the second type carriage is a carriage with a pantograph; the third type carriage is a carriage with a cab.
3. The high-voltage electrical box according to claim 2, wherein when the train is not provided with emergency traction measures, the reserved part needs to be provided with corresponding electrical components, wherein the corresponding electrical components comprise an anti-reverse diode and an emergency contactor, a cathode of the anti-reverse diode is electrically connected with the first high-speed circuit breaker or the second high-speed circuit breaker, an anode of the anti-reverse diode is electrically connected with the emergency contactor, and the emergency contactor is electrically connected with a storage battery to form the emergency branch; when the pantograph of train breaks down, excision first high speed circuit breaker or the high speed circuit breaker of second closes emergency contactor to break off first sub-traction branch road or the sub-traction branch road of second communicates emergency branch road adopts the battery does on the train first type carriage or the traction unit power supply in second type carriage.
4. The high-voltage electrical box according to claim 2, characterized in that said auxiliary branch further comprises an isolation diode between said auxiliary contact and said three-way fuse for isolating said pantograph from said auxiliary unit on said auxiliary branch.
5. The high-voltage electrical box as claimed in claim 4, wherein the auxiliary branch further comprises an absorption resistor and an absorption capacitor, and the absorption resistor and the absorption capacitor are connected in series and then connected in parallel with the isolation diode.
6. The high-voltage electrical box according to claim 2, wherein a workshop power interface is further arranged on the box body, is electrically connected with a workshop contact of the three-position switch, and is used for externally connecting power supply equipment to supply power to each equipment to be debugged on the train when the train is debugged in the garage.
7. The high-voltage electrical box according to claim 6, wherein the three-position switch and the workshop power interface are arranged in a right area in the box body along the length direction of the train; the first high-speed circuit breaker and the second-height circuit breaker are arranged in the box body and along the left area of the vehicle length direction.
8. The high-voltage electrical box as claimed in any one of claims 1 to 7, wherein a guide rail is arranged at a position of the bottom of the box body corresponding to the three-position switch.
9. The high-voltage electrical box as claimed in claim 8, wherein the box body comprises a main frame welded into a U-shaped beam using stainless steel rectangular tubes, and a thin plate for sealing the main frame; and a door cover plate is arranged at the position of the box body corresponding to the three-position switch and is used for isolating the three-position switch from the external environment of the high-voltage electric appliance box.
10. The high voltage electrical box of claim 9, wherein the box body further comprises a mounting bracket; the mounting bracket comprises an extension square pipe, a lifting lug and a supporting rod; wherein;
the extension square tube is positioned on the top end face of the box body and extends along the length direction of the train;
the lifting lug is connected with the end, far away from the box body, of the extending square pipe, so that the high-voltage electrical box can be conveniently installed at the bottom of the train body;
one end of the supporting rod is fixed on the box body, the other end of the supporting rod is fixed on the extension square tube, and the supporting rod reinforces the support of the box body.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111214618.4A CN114013294B (en) | 2021-10-19 | 2021-10-19 | High-voltage electrical equipment box |
| PCT/CN2021/142070 WO2023065529A1 (en) | 2021-10-19 | 2021-12-28 | High-voltage electrical box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111214618.4A CN114013294B (en) | 2021-10-19 | 2021-10-19 | High-voltage electrical equipment box |
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| CN114013294A true CN114013294A (en) | 2022-02-08 |
| CN114013294B CN114013294B (en) | 2024-09-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111214618.4A Active CN114013294B (en) | 2021-10-19 | 2021-10-19 | High-voltage electrical equipment box |
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| CN (1) | CN114013294B (en) |
| WO (1) | WO2023065529A1 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20000045994A (en) * | 1998-12-31 | 2000-07-25 | 추호석 | Pantograph control circuit by earth switch |
| CN104901170A (en) * | 2015-05-08 | 2015-09-09 | 株洲南车时代电气股份有限公司 | High-voltage electrical appliance |
| CN110228372A (en) * | 2019-06-18 | 2019-09-13 | 中车大连机车车辆有限公司 | A kind of third rail and lithium battery hybrid power supply circuit |
| US20200207376A1 (en) * | 2017-09-15 | 2020-07-02 | Fms Advisers | Power system and associated method |
| US20210301546A1 (en) * | 2020-03-30 | 2021-09-30 | Michael Hardin | Building container outrigger and methods of use |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111071057B (en) * | 2018-10-19 | 2021-05-04 | 中车唐山机车车辆有限公司 | Magnetic suspension train and traction control method and system thereof |
| RU201878U1 (en) * | 2020-08-13 | 2021-01-19 | Общество с ограниченной ответственностью "Уральские локомотивы" | POWER WIRING DIAGRAM OF THE DC ELECTRIC TRAIN |
-
2021
- 2021-10-19 CN CN202111214618.4A patent/CN114013294B/en active Active
- 2021-12-28 WO PCT/CN2021/142070 patent/WO2023065529A1/en unknown
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20000045994A (en) * | 1998-12-31 | 2000-07-25 | 추호석 | Pantograph control circuit by earth switch |
| CN104901170A (en) * | 2015-05-08 | 2015-09-09 | 株洲南车时代电气股份有限公司 | High-voltage electrical appliance |
| US20200207376A1 (en) * | 2017-09-15 | 2020-07-02 | Fms Advisers | Power system and associated method |
| CN110228372A (en) * | 2019-06-18 | 2019-09-13 | 中车大连机车车辆有限公司 | A kind of third rail and lithium battery hybrid power supply circuit |
| US20210301546A1 (en) * | 2020-03-30 | 2021-09-30 | Michael Hardin | Building container outrigger and methods of use |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114013294B (en) | 2024-09-27 |
| WO2023065529A1 (en) | 2023-04-27 |
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