CN211183805U - Integrated structure compact type high-voltage frequency converter - Google Patents

Integrated structure compact type high-voltage frequency converter Download PDF

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Publication number
CN211183805U
CN211183805U CN201922452009.7U CN201922452009U CN211183805U CN 211183805 U CN211183805 U CN 211183805U CN 201922452009 U CN201922452009 U CN 201922452009U CN 211183805 U CN211183805 U CN 211183805U
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China
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inverter
transformer
power unit
voltage
cabinet
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CN201922452009.7U
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石本星
郭永松
曹强
陈健枫
许贤昶
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Guangzhou Zhiguang Electric Technology Co ltd
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Guangzhou Zhiguang Electric Technology Co ltd
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Abstract

The application provides an integrated compact structure type high-voltage frequency converter. The method comprises the following steps: bottom base, the inverter body, control box and fan structure accessory, the device collect high-pressure business turn over cabinet, transformer cabinet, power module cabinet, switch board and heat dissipation cooling device as an organic whole, and this application has solved the loaded down with trivial details technical problem of high-voltage inverter equipment complex operation in the correlation technique, has the advantage that takes up an area of for a short time, compact structure, and on-the-spot installation and debugging are convenient, later maintenance is convenient, the operational reliability is high.

Description

Integrated structure compact type high-voltage frequency converter
Technical Field
The application relates to the field of structural design of cascaded high-voltage frequency converters, in particular to an integrated structure compact high-voltage frequency converter.
Background
The frequency converter converts power frequency electricity into electric energy inverter with adjustable frequency by utilizing the on-off action of the power semiconductor device. With the development of social productivity, as a novel energy-saving product, the high-voltage frequency converter is widely used for speed regulation, energy conservation, soft start and intelligent control of a high-voltage motor in various industries such as a thermal power plant, petroleum, chemical engineering, tap water, a cement plant, a mine, metallurgy and the like.
The high-voltage frequency converter belongs to large-scale power electronic transmission equipment, is mainly installed indoors, and has strict requirements on the temperature, the humidity, the dust content and the like of an installation environment. The power conversion of the high-voltage frequency converter is lossy, the efficiency of the high-voltage frequency converter is up to more than 96%, and the rest 4% of the high-voltage frequency converter is mainly emitted in the form of heat, so that the high-voltage frequency converter can continuously heat the environment in the operation process. If the heat generated by the high-voltage frequency converter cannot be taken away in time, a heat accumulation effect is formed, the ambient temperature of the high-voltage frequency converter is gradually increased, and finally, certain parts of the high-voltage frequency converter are overheated to protect the tripping system main switch circuit breaker, so that equipment and production installation are seriously endangered.
At present, a high-voltage frequency converter is composed of four parts, namely a bypass cabinet, a transformer cabinet, a power unit module cabinet and a control cabinet, and the high-voltage frequency converter generally adopts a forced air cooling mode to carry out heat dissipation, wherein the forced air cooling mode is the safest and most direct heat dissipation mode. The bypass cabinet is mainly convenient for users to access high-voltage armored cables, and high-voltage isolating switches and high-voltage vacuum contactors meeting user requirements are installed inside the bypass cabinet. When the frequency converter quits operation, the motor is switched into a power frequency power supply to operate through the bypass cabinet so as to ensure continuous operation of production. A high-isolation phase-shifting transformer is arranged in the transformer cabinet, and the secondary side of the transformer cabinet is provided with multi-winding output, so that an independent phase-shifting power supply is provided for the power unit module, the current waveform of a network side can be greatly improved, and the harmonic interference of equipment to a power grid is reduced. The power unit module cabinet is internally provided with modularized and interchangeable power unit modules, so that the production and the maintenance are convenient; wherein the number of power cells depends on the level of the output voltage. Generally, a power unit module cabinet of a 3KV cascade system consists of 9 power units, wherein each 3 power units are connected in series to form one phase, and the three phases are connected in a Y-way; the power unit module cabinet of the 6KV cascade system consists of 15 power units, wherein each 5 power units are connected in series to form one phase, and the three phases are Y-connected; a power unit module cabinet of a 10KV cascade system consists of 24 power units, wherein each 8 power units are connected in series to form one phase, and the three phases are connected in a Y mode. And a secondary control device and a system controller are installed in the control cabinet and used for realizing space vector control and optical fiber communication with the power unit, and the control cabinet needs to be completely isolated from the high-voltage device. In addition, an external control and communication interface is installed in the control cabinet to meet different field application requirements.
The cabinet body that constitutes high-pressure cascade converter usually all is more, and each part is all opposed each other moreover, need dismantle the connecting wire between each cabinet after the factory debugging, connects the connecting wire between each cabinet again on the scene and repeatedly does the test between each cabinet, therefore area is big: for example, the length of a small-capacity conventional cascade variable-frequency incoming line cabinet is 700mm, the length of a transformer cabinet is 1900mm, the length of a power unit module cabinet is 1700mm, the length of a control cabinet is 500mm, the depth of a cabinet is 1280mm, and the height of the cabinet is 2650 mm.
Aiming at the technical problem that the assembly operation of a high-voltage frequency converter in the related technology is complex, an effective solution is not provided at present.
SUMMERY OF THE UTILITY MODEL
The embodiment of the application provides a compact high-voltage inverter of integrated structure to at least, solve the technical problem that high-voltage inverter assembles complex operation in the correlation technique.
According to an aspect of the embodiments of the present application, there is provided an integrated high-voltage inverter with a compact structure, including: including bottom base, the inverter body, control box and heat dissipation cooling device, wherein, the inverter body with the control box is structurally mutually independent, the control box adopts the mode of embedding installation to install the inverter body is internal, heat dissipation cooling device installs the top of the inverter body with the inside of the inverter body, the inverter body install on the base of bottom.
Optionally, a high-voltage wire inlet and outlet insulator is installed in the frequency conversion cabinet, the transformer is fixed on a base at the bottom of the cabinet body, and a secondary wire inlet and outlet junction box is installed in the cabinet.
Optionally, the transformer adopts multilayer air duct baffles to seal with the periphery of the cabinet body, so as to ensure the heat dissipation of the transformer coil. The number of layers of the air duct partition plate can adopt different design schemes, such as one layer, two layers, three layers and the like according to different heat productivity of the transformer.
Optionally, an insulating framework is installed inside the rear cabinet body, the insulating framework is divided into an upper layer and a lower layer, each layer adopts an L-shaped structure to install the power unit module, namely, the front side is provided with one phase of power unit wood block, and the rear side is provided with two phase of power unit modules.
Optionally, the heat dissipation cooling device includes a transformer, a power unit ventilation duct, a sealing partition between the transformer and the power module, a heat dissipation fan, and the like, and hot air pumped by the transformer does not pass through the power unit module, that is, the power unit body module is not circularly heated, and has its own independent cold air source.
According to the above technical scheme, the utility model discloses with high-pressure business turn over line room, the transformer room, power unit module room, control room and heat dissipation cooling device combination high-voltage inverter as an organic whole, wherein high-pressure business turn over line insulator, transformer and secondary business turn over line box are installed at cabinet body lower half, and power unit module and control system install first one at the cabinet body, heat dissipation cooling device has integrateed the fan mounting, radiator fan, the thermal-arrest wind channel, transformer and power unit module baffle are installed respectively in the middle of cabinet body top and cabinet body, cold wind gets into from both sides around the cabinet body, respectively through in the radiator of transformer high-low voltage coil surface and power unit module to the thermal-arrest wind channel, then arrange the cabinet body outside in the counter top fan, this cooling device can ensure the safe and reliable operation of converter system. Compared with the prior art, the utility model has the advantages of as follows and beneficial effect:
1. the transformer, the control system and the power unit module are installed together, the high-voltage inlet and outlet cabinet, the transformer chamber, the power unit module chamber, the control cabinet and the heat dissipation cooling device are integrated, all internal high-voltage primary cables and secondary control cables are installed in a factory in sequence, the cables do not need to be connected and checked again on site, and the transformer, the control system and the power unit module can be used only by connecting the inlet and outlet primary cables and the secondary cables on site. The system has the advantages of compact structure, small occupied area, low cost, convenient transportation, simple on-site wire adjustment and connection, convenient debugging and simple maintenance.
2. The power unit module and the transformer share a unique heat dissipation cooling device, the transformer and the power unit module share a heat dissipation fan, the utilization rate of the fan is fully improved, the heat dissipation of the transformer and the heat dissipation of the power module are independent, and meanwhile, the reliability of the frequency converter can be greatly improved.
3. The frequency converter is very convenient to produce, install and carry: the frequency conversion cabinet body is detached from the base, and the transformer is installed in place, and then the cabinet body is sleeved on the base with the transformer fixed well from top to bottom; the control system in the control box can be fixed on the cabinet body after being installed on the operation platform. In order to facilitate the internal wiring of the system, the appearance structure of the transformer is quite unique, namely a high-voltage input terminal, a secondary wire outlet terminal, a high-voltage tap and a secondary power supply connector provided by a third coil are all distributed on the side close to a cabinet door, the transformer adopts a plurality of layers of air duct partition plates to be sealed with the periphery of the cabinet body, cold air is ensured to flow through the surfaces of the high-voltage and low-voltage coils of the transformer under the condition that a fan on the top of the cabinet draws air, and the inner diameter of the air duct partition plates is. The frequency conversion integrated cabinet after the complete set can meet the requirements of supporting and transporting the bottom of a forklift, hoisting the bottom of a lifting rope cabinet body downwards and hoisting the top of the lifting rope cabinet body.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a schematic view of the overall structure of an embodiment of the present invention;
fig. 2 is a schematic front internal structure diagram according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a back internal structure in an embodiment of the present invention;
fig. 4 is a schematic diagram of a system heat dissipation principle in an embodiment of the present invention.
Detailed Description
The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
As shown in fig. 1, the utility model discloses integrated compact structure type high-voltage inverter, including bottom base 1 (can be called the base for short), the inverter body 2 (can be called the cabinet body for short), control box 3 and fan mounting 4. The bottom base 1 adopts a channel steel 101 welding structure, a bottom hoisting ring 102 is welded on the channel steel base 1, and the channel steel base 1 mainly bears the weight of the whole frequency converter, can meet the carrying requirement of a forklift and is a link for installation and transportation. The cabinet body 2 and the control box body 3 are mutually independent in structure, are embedded in the cabinet body by adopting a metal frame type structure and the control box body 3, are fixed into an integrated cabinet through screws and are jointly fixed on the bottom base 1. A cabinet combination wire passing hole 201 is reserved in a side door plate of the cabinet body 2, a top lifting ring 202 is arranged at the top of the cabinet body 2, a transformer chamber door 203 is installed at the lower half part of the cabinet body 2 (namely the part where the transformer is located, the inner space is the first chamber, or called transformer chamber), a power unit chamber door 204 is installed at the upper half part of the cabinet body 2 (namely the part outside the transformer, the inner space is the second chamber, or called power unit module and control chamber), and a top cover plate 205 is installed at the top of the cabinet body 2; a louver, a temperature controller and the like are installed on the transformer chamber door 203, and a louver, an electromagnetic lock and the like are installed on the power unit chamber door 204; the transformer 210 is arranged at the lower half part in the cabinet body 2, the transformer 210 is fixed on the base 1, and the surface of the transformer 210 is provided with a high-voltage incoming and outgoing line insulator 211, an output secondary wiring terminal 212, an air duct partition plate 213 and the like. The control box body 3 is provided with a control room door 301 on the front surface, and the control room door 301 is provided with a fixed human-computer interface, an indicator light, a button and the like. The fan fixing part 4 is installed and fixed on the top of the cabinet body, and a heat radiation fan 401 is installed in the fan fixing part.
Referring to fig. 2, the lower half part of the front of the cabinet body 2 is a transformer 210, the outer surface of the transformer 210 is provided with an external output secondary wiring terminal 212, an air duct partition plate 213 of the transformer and the periphery of the cabinet body 2 are hermetically processed, one side of the cabinet body close to the side is provided with a secondary wiring terminal 214 for the frequency converter to be externally wired, the appearance structure design of the transformer 210 is unique, a secondary power supply terminal provided by a high-voltage input terminal, a secondary wire outlet terminal, a high-voltage tap and a third coil are all close to a cabinet door and are convenient to wire and maintain, the top of a coil of the transformer 210 is sealed with the periphery of the cabinet body 2 by the air duct partition plate 213, cold air is ensured to flow through the surfaces of high-low voltage coils of the transformer under the condition of induced draft of a cooling fan, an insulating framework 220 is installed on one side of the upper half part of the cabinet body 2, the insulating framework 220 is divided into an upper layer and a lower layer, 4 power unit modules 221 are installed on each layer, the other side of the upper.
Referring to fig. 3, the lower half portion of the back of the cabinet 2 is a transformer 210, an external output secondary connection terminal 212 is arranged on the outer surface of the transformer 210, a transformer air duct partition 213 and the cabinet 2 are sealed, a sealing rubber ring facilitating wire passing is laid on the transformer air duct partition 213, and a high-voltage wire inlet and outlet insulator 211 for external connection of a frequency converter is arranged on one side of the cabinet close to the side. An insulating framework 220 is arranged in the upper half part of the cabinet body 2, the insulating framework 220 is divided into an upper layer and a lower layer, and at most 8 power unit modules 221 are arranged on each layer.
As shown in fig. 4, the heat dissipation and cooling device of the frequency converter includes a heat dissipation fan 401, a fan fixing member 4, a heat collection air duct and a partition 410 of the transformer chamber and the power unit module chamber, and the heat collection air duct is composed of a cabinet top cover plate 205, a heat collection partition 413, a power unit module ventilation plate 412 and a transformer ventilation plate 411. The heat radiation fan 401 is installed in the fan fixing member 4, the heat collection air channel is a bridge connecting the heat radiation fan 401 with the power unit module and the transformer, and the partition plate 410 is arranged between the transformer chamber and the power module chamber and ensures that hot air of the transformer cannot enter the power unit module. The cold air in the inverter chamber enters the transformer 210 and the power unit module 221 through the louver of the transformer chamber cabinet door 203 and the power unit module chamber cabinet door 204, due to the airtight sealing between the partition 213 of the transformer air duct and the periphery of the cabinet, the cool air is forced to pass through the surfaces of the high and low voltage coils of the transformer, the ventilation holes are formed on the ventilation plate 412 of the power unit module and the ventilation plate 411 of the transformer, then the heat generated by the transformer and the power unit module is collected into the heat collecting air duct to be changed into hot air, the hot air is pumped into the frequency converter chamber through a fan on the top of the cabinet, the transformer and the power unit module are both provided with temperature measuring and over-temperature alarming devices, the power unit module 221 and the transformer 210 share a heat radiation fan 401, by adjusting the ventilation area of the transformer ventilation board 411 and the inner diameter of the transformer air duct partition 213, the good heat dissipation of each power unit module 221 and the transformer 210 can be ensured. The heat scheme greatly improves the utilization rate of the heat radiation fan and effectively improves the reliability of the frequency converter.
In addition, transformer room door and power room door have all set up the shutter that has the ventilation effect, and the control box sets up the control cabinet door. Install the ventilation shutter who conveniently dismantles on the shutter door, install dustproof filter screen in the shutter, the electric five that prevent simultaneously on the cabinet door that the installation prevents to be opened at will prevents the lock. A human-computer interface is installed on the control room door, and a high-voltage input instruction, a standby instruction, a fault alarm, an emergency stop button and the like are arranged above the human-computer interface.
All electrified bodies in the frequency conversion cabinet body and the electric clearance and creepage distance of the cabinet body frame all meet the requirements of national industry standards, the electric distance between the high-voltage electrified part and the peripheral uninsulated conductors is not less than 125mm, the creepage distance is not less than 160mm, and electric appliance elements meeting the five-prevention requirements, such as a cabinet door travel switch, a battery lock, a high-voltage electrified display device and the like, are installed in the cabinet. The floor area of the frequency converter is only about 60% of that of the conventional high-voltage frequency converter, and the problem of installation space is effectively solved.
The utility model discloses high pressure business turn over cabinet, transformer cabinet, power module cabinet, switch board and heat dissipation cooling device and each subassembly that will protect all are the entity product that has definite shape, structure and occupy certain space. Are all components of a particular hardware architecture that may operate independently.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides an integration compact structure type high-voltage inverter, its characterized in that, includes bottom base, the inverter body, control box and heat dissipation cooling device, wherein, the inverter body with the control box is structurally mutually independent, the control box adopts the mode of embedding installation to install the inverter is internal, heat dissipation cooling device installs the top of the inverter body with the inside of the inverter body, the inverter body install on the bottom base.
2. The high-voltage inverter of claim 1, wherein a high-voltage incoming and outgoing line insulator is installed in the inverter cabinet body, the bottom base is used for installing and fixing a transformer, the transformer is located in the lower half part of the inverter cabinet body under the condition that the inverter cabinet body is installed on the bottom base, and a power unit module and a control system are installed in the upper half part of the inverter cabinet body.
3. The high-voltage inverter of claim 2, wherein a gap between the transformer and the inverter body is provided with a plurality of layers of air duct partitions, the plurality of layers of air duct partitions are used for preventing air flowing from the outside of the inverter body from flowing from the gap to the upper half part of the inverter body, and a first chamber in which the transformer is located is structurally isolated and independent from a second chamber in which the power unit module and the control system are located.
4. The high-voltage inverter of claim 3, wherein an insulating framework is installed in the upper half portion of the inverter cabinet body, the insulating framework is divided into an upper layer and a lower layer, each layer is arranged in an L shape, a maximum of 12 power unit modules can be installed on each layer, and the control box body is installed in the upper half portion of the inverter cabinet body in an embedded installation mode.
5. The high-voltage inverter of claim 4, wherein the heat dissipation cooling device comprises a heat dissipation fan, a fan fixing member, a heat collection air duct and a compartment partition plate between the first compartment and the second compartment, the heat collection air duct is used for separating the gas heated by the transformer from the gas heated by the power unit module, the fan is used for extracting the gas heated by the transformer and the gas heated by the power unit module from the inverter cabinet body, the gas heated by the transformer is derived from the cabinet body vent hole at the lower half part of the inverter cabinet body, and the gas heated by the power unit module is derived from the cabinet body vent hole at the upper half part of the inverter cabinet body.
6. The high-voltage inverter of claim 5, wherein the heat collection air channel is a heat dissipation air cavity shared by the transformer and the power unit module, and the heat collection air channel is an air channel formed by a top cover plate of the inverter cabinet body, a heat collection partition plate, a ventilation plate of the power unit module, and a ventilation plate of the transformer.
7. The high-voltage frequency converter according to claim 6, wherein a first room in which the transformer is located and a sub-room in which the power unit module is located are provided with louver ventilation doors, the sub-room in which the control box body is located has an individual control cabinet door, and the second room comprises the sub-room in which the power unit module is located and the sub-room in which the control box body is located.
8. The high-voltage frequency converter according to claim 7, wherein the control cabinet door is provided with a human-computer interaction module, an indicator light and a button.
9. The high-voltage frequency converter according to claim 8, wherein the bottom base adopts a channel steel welding structure, and a lifting ring for lifting the bottom base is welded on the bottom base.
10. The high-voltage inverter of claim 9, wherein the inverter cabinet and the control box are of a modular structure.
CN201922452009.7U 2019-12-27 2019-12-27 Integrated structure compact type high-voltage frequency converter Active CN211183805U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201922452009.7U CN211183805U (en) 2019-12-27 2019-12-27 Integrated structure compact type high-voltage frequency converter

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Application Number Priority Date Filing Date Title
CN201922452009.7U CN211183805U (en) 2019-12-27 2019-12-27 Integrated structure compact type high-voltage frequency converter

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CN211183805U true CN211183805U (en) 2020-08-04

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CN201922452009.7U Active CN211183805U (en) 2019-12-27 2019-12-27 Integrated structure compact type high-voltage frequency converter

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112038915A (en) * 2020-09-03 2020-12-04 中国人民解放军海军工程大学 Opposite-mounted vertical air-cooling heat dissipation system and control method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112038915A (en) * 2020-09-03 2020-12-04 中国人民解放军海军工程大学 Opposite-mounted vertical air-cooling heat dissipation system and control method
CN112038915B (en) * 2020-09-03 2022-06-28 中国人民解放军海军工程大学 Opposite-mounted vertical air-cooling heat dissipation system and control method

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