CN216390776U - Power supply cabinet and frequency converter cabinet thereof - Google Patents

Abstract

The utility model relates to a power supply cabinet and a frequency converter cabinet thereof, wherein a frequency converter is arranged in the frequency converter cabinet, the front side wall of the frequency converter cabinet is used for installing a cabinet door, at least a first water cooling plate is arranged in the frequency converter cabinet, one side of the first water cooling plate, which faces the cabinet door, is an inner side, and the other side of the first water cooling plate is an outer side; and the frequency converter and the power line wiring device are arranged in the space on the inner side of the first water cooling plate, and the control signal wiring device is arranged in the space on the outer side of the first water cooling plate. According to the utility model, the water cooling plate is not only used for heat dissipation of the frequency converter, but also used for separating the space in the frequency converter cabinet, and the separated space is convenient for layout of the frequency converter, the power line wiring device and the control signal wiring device, so that the space in the whole frequency converter cabinet can be fully utilized on the premise of meeting the electrical performance and the heat dissipation performance, and the equipment layout is compact and reasonable.

Description

Power supply cabinet and frequency converter cabinet thereof

Technical Field

The present invention relates generally to the field of power supply systems. More specifically, the utility model relates to a power supply cabinet and a frequency converter cabinet thereof.

Background

Oil fields, mines and the like are often in the field, and common power supply and distribution lines cannot be laid in place. Therefore, in the application scenes of oil fields, mines and the like, independent power supply equipment needs to be arranged, power is directly obtained from a high-voltage power grid, and then voltage reduction is carried out to obtain voltage suitable for industrial equipment. Such power supply equipment may be a power supply cabinet, which includes one or more cabinet bodies, and different equipment is installed in different cabinet bodies, which may include, for example, a power inlet cabinet, a transformer cabinet and a frequency converter cabinet; for example, a transformer cabinet includes a transformer, and a primary side of the transformer is connected to a power grid and is used for obtaining a power supply voltage from a high-voltage power grid and transforming the power supply voltage to obtain a voltage suitable for equipment. The frequency converter cabinet comprises a frequency converter, and the frequency converter is connected with the secondary side of the transformer so as to carry out frequency conversion processing on the voltage after voltage transformation. After frequency conversion treatment, the power cable can be used for connecting industrial equipment such as a motor and the like and driving the operation of the industrial equipment such as the motor and the like.

The main circuit of the frequency converter in the frequency converter cabinet is in a high-voltage power system, and meanwhile, in order to work normally, the frequency converter itself also needs a control signal of a low-voltage control system to control and manage the internal elements (for example, to control the on and off of an IGBT in the frequency converter). That is to say, the frequency converter not only relates to high-voltage power system, but also relates to low pressure control system, and need carry out the isolation between high-voltage power system and the low pressure control system, avoids high-voltage power system to the negative effect of low pressure control system. In addition, the frequency converter has a large heat value, and needs to dissipate heat of the frequency converter and the space in the cabinet, so that various heat dissipation devices are needed.

In summary, there are many devices in the frequency converter cabinet, and the types of the devices are different, so that a limited space inside the frequency converter cabinet needs to be planned, various devices are installed and distributed in the limited space, and the requirements of electrical performance and heat dissipation performance are met.

SUMMERY OF THE UTILITY MODEL

The utility model provides a power supply cabinet and a frequency converter cabinet thereof, which are used for at least solving the problem of reasonably utilizing the internal space of the frequency converter cabinet on the premise of ensuring the requirements of electrical performance and heat dissipation performance.

In order to solve the problems, the utility model provides the following technical scheme:

according to a first aspect of the present invention, the present invention provides a frequency converter cabinet, wherein a frequency converter is installed inside the frequency converter cabinet, a cabinet door is installed on a front side wall of the frequency converter cabinet, at least a first water cooling plate is arranged in the frequency converter cabinet, one side of the first water cooling plate facing the cabinet door is an inner side, and the other side of the first water cooling plate is an outer side; and the frequency converter and the power line wiring device are arranged in the space on the inner side of the first water cooling plate, and the control signal wiring device is arranged in the space on the outer side of the first water cooling plate.

In one embodiment, a second water cooling plate is further arranged in the frequency converter cabinet, and the second water cooling plate is vertically butted with the first water cooling plate; and a first power unit of the frequency converter is arranged on the inner side of the first water cooling plate, and a second power unit of the frequency converter is arranged on the inner side of the second water cooling plate.

In one embodiment, the outer side of the second water-cooling plate faces to the right side wall of the frequency converter cabinet, and the power line wiring device is assembled on the right side wall.

In one embodiment, the first power unit of the frequency converter is a rectifying unit, and the second power unit of the frequency converter is an inverting unit.

In one embodiment, the second water-cooling plate is also provided with a power capacitor on the inner side for filtering and stabilizing direct-current voltage.

In one embodiment, the bottom wall of the frequency converter cabinet is provided with a high-voltage assembly.

In one embodiment, a drying agent is placed below the high-voltage assembly and used for drying air in the frequency converter cabinet.

In one embodiment, the right side wall of the inverter cabinet is also provided with an air conditioner and a heater.

In one embodiment, the frequency converter cabinet further comprises a left side wall arranged opposite to the right side wall, and the left side wall is provided with a wiring hole for introducing a cable from the outside to connect the frequency converter.

According to a second aspect of the present invention, the present invention further provides a power supply cabinet, which includes a power inlet cabinet, a transformer cabinet, and the frequency converter cabinet according to any of the above embodiments.

The space in the frequency converter cabinet is divided into at least two parts by the water cooling plate while the heat of the frequency converter is dissipated by the water cooling plate, namely, the space is divided into the space outside the water cooling plate and the space inside the water cooling plate; the frequency converter and the power line wiring device are arranged in the space on the inner side of the water cooling plate, and the control signal wiring device is arranged in the space on the outer side of the water cooling plate, so that the control signal wiring device and the power line wiring device can be separated by a longer distance, and the negative influence of a high-voltage power system on a low-voltage control system is avoided. And the frequency converter and other equipment are arranged in the space at the inner side of the water cooling plate, so that the maintenance work of workers is facilitated. Therefore, the utility model can fully utilize the space in the whole frequency converter cabinet on the premise of meeting the requirements of electrical performance and heat dissipation performance, so that the equipment layout is compact and reasonable.

Drawings

The above and other objects, features and advantages of exemplary embodiments of the present invention will become readily apparent from the following detailed description read in conjunction with the accompanying drawings. Several embodiments of the present invention are illustrated by way of example, and not by way of limitation, in the figures of the accompanying drawings and in which like reference numerals refer to similar or corresponding parts and in which:

fig. 1 is a schematic structural diagram of a power supply cabinet according to an embodiment of the utility model;

FIG. 2 is a front view of the interior of the frequency converter cabinet;

FIG. 3 is a sectional view taken along line B-B of FIG. 2;

FIG. 4 is a cross-sectional view taken along line D-D of FIG. 2;

FIG. 5 is a cross-sectional view taken along line C-C of FIG. 2;

the system comprises an incoming line cabinet 1, a transformer cabinet 2, a frequency converter cabinet 3, a control signal wiring device 31, a power line wiring device 32, a fan 33, an air conditioner internal unit 34, an air conditioner external unit 35, a first water cooling plate 51, a second water cooling plate 52, a high-voltage assembly 41, a rectifying unit 42, a power capacitor 43, an inverter unit 44, a heater 45, a power adapter 411, a high-voltage sampling unit 412, a pre-charging unit 413, a heating control unit 71, a wiring terminal row 72, a drying agent 73 and a circuit breaker 74.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it should be understood by those skilled in the art that the embodiments described below are a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, fig. 1 shows a power supply cabinet. The power supply cabinet can be used in occasions such as oil fields, mines and the like, and has the function of outputting electric energy outwards to drive large-scale industrial equipment, for example, providing electric energy for a motor to drive oil extraction equipment, drilling equipment and the like. The main principle of the power supply cabinet is that high-voltage power is connected from a power grid, voltage reduction processing is carried out, then frequency conversion processing is carried out, and finally low-voltage alternating current with adjustable power and frequency is output (the low voltage is relative to the input high-voltage power). Generally, a transformer is arranged in a power supply cabinet, and the primary side of the transformer is connected with a high-voltage power grid and used for obtaining electric energy from the high-voltage power grid and transforming voltage to obtain voltage suitable for equipment; and the secondary side of the transformer is connected with a frequency converter for frequency conversion treatment.

As shown in fig. 1, a power supply cabinet includes a power supply cabinet 1, a transformer cabinet 2, and a frequency converter cabinet 3, which are sequentially arranged from left to right (in the direction shown in the figure). The inlet cabinet 1 is used for connecting a high-voltage power grid, for example, a high-voltage cable is connected through an inlet box on one side wall of the inlet cabinet 1, and a high-voltage power supply is led into a power supply cabinet. The transformer cabinet 2 is provided with a transformer, and the transformer performs voltage reduction processing on input high-voltage alternating current, for example, the primary side of the transformer is connected with the high-voltage power accessed from the incoming line cabinet 1, and the secondary side of the transformer generates low-voltage alternating current. And a frequency converter is arranged in the frequency converter cabinet 3 and is used for carrying out frequency conversion treatment on the low-voltage alternating current from the secondary side of the transformer. For example, the frequency conversion process may include a rectification process and an inversion process, and accordingly, the frequency converter includes a rectification unit and an inversion unit.

According to a first aspect of the utility model, a frequency converter cabinet 3 is provided. The left side wall of the frequency converter cabinet 3 is used for being connected with the transformer cabinet 2, and the right side wall is provided with a power line wiring device 32 which is used for directly providing electric energy for equipment such as a motor and the like; and an air conditioner is also arranged on the right side wall and comprises an air conditioner inner unit 34 and an air conditioner outer unit 35. The cabinet door is installed on the front side wall and can be opened and closed, and therefore workers can conveniently overhaul equipment in the cabinet. A fan 33 is also provided above the frequency converter cabinet 3 for promoting air circulation inside the entire frequency converter cabinet 3.

Fig. 2 is a front view of the frequency converter cabinet, showing the structure of the rear side wall of the frequency converter cabinet 3. Fig. 3 is a sectional view taken along line B-B of fig. 2, showing the structure of the right side wall of the frequency converter cabinet 3; fig. 4 is a sectional view taken along line D-D of fig. 2, showing the bottom wall structure of the frequency converter cabinet 3; fig. 5 is a sectional view taken along line C-C of fig. 2, showing the structure of the left side wall of the frequency converter cabinet 3. The internal structure of the frequency converter cabinet will be described in detail with reference to fig. 2-5.

As shown in fig. 4, a first water-cooling plate 51 arranged parallel to the rear side wall and a second water-cooling plate 52 arranged parallel to the right side wall are provided in the frequency converter cabinet 3; the first water cooling plate 51 is vertically butted with the second water cooling plate 52, and is in an L shape. Defining one side of the first water-cooling plate 51 facing the rear side wall as an outer side and one side facing the cabinet door (i.e. the front side wall) as an inner side; similarly, one side of the second water cooling plate 52 facing the right sidewall is defined as the outer side, and the other side is defined as the inner side.

The space outside the first water cooling plate 51 is used for installing the heat dissipation pipeline and the control signal wiring device 31, and the space outside the second water cooling plate 52 is also provided with the heat dissipation pipeline. The heat dissipation pipeline is used for introducing cooling liquid into the first water-cooling plate 51 and the second water-cooling plate 52 to perform heat exchange with the frequency converter, and guiding out the cooling liquid after heat exchange. As can be seen from fig. 3, the space inside the first water-cooled plate 51 is used for installing the frequency converter and the power line wiring device 32.

The power line wiring device 32 is internally connected with the output of the frequency converter and externally connected to industrial electric equipment such as a motor and the like through a cable, so that the power line wiring device 32 belongs to a high-voltage power system; the control signal wiring device 31 is used for generating and outputting a control signal, the control signal can be connected to a frequency converter (such as an IGBT of an inverter unit) and can also be connected to other equipment such as an air conditioner, and therefore the control signal wiring device 31 belongs to a low-voltage control system.

From the above description, it can be seen that the basic concept of the present invention is: the space in the frequency converter cabinet 3 is divided into at least two parts, namely a space outside the water cooling plate and a space inside the water cooling plate by the water cooling plate while the heat dissipation of the frequency converter is realized by the water cooling plate; the frequency converter and the power line wiring device 32 are arranged in the space on the inner side of the water cooling plate, and the control signal wiring device 31 is arranged in the space on the outer side of the water cooling plate. In one embodiment, the control signal wiring device 31 and the power line wiring device 32 are located at a greater distance to avoid negative effects of the high voltage power system on the low voltage control system. In addition, locate equipment such as converter in the inboard space of water-cooling board, the staff opens the cabinet door and can observe and operate, is favorable to daily maintenance work. Therefore, on the premise of meeting the electrical performance and the heat dissipation performance, the utility model can arrange a plurality of devices in a smaller space, fully utilizes the space in the whole frequency converter cabinet 3, and has compact and reasonable device layout.

Further, as can be seen from fig. 2, the rectifying unit 42 of the frequency converter is mounted on the inner side of the first water-cooling plate 51. The inverter unit 44 of the frequency converter is mounted on the inner side of the second water cooling plate 52. The rectifying unit 42 and the inverting unit 44 are main heat generating components of the frequency converter, so that the rectifying unit 42 and the inverting unit 44 of the frequency converter are respectively arranged on the first water cooling plate 51 and the second water cooling plate 52, namely, the frequency converter is respectively cooled through the two water cooling plates, the overall heat dissipation capacity can be improved, and the frequency converter is favorably maintained at a proper working temperature.

As shown in fig. 4, the width of the second water cooling plate 52 is smaller than that of the right side wall, and the spare space is used for installing an air conditioner (including the air conditioner internal unit 34 and the air conditioner external unit 35) and the power line wiring device 32. The power line wiring device 32 and the control signal wiring device 31 are basically positioned on two opposite corners in the cabinet body, and the maximum distance in the cabinet body is arranged between the power line wiring device and the control signal wiring device, so that the isolation effect is good; and the control signal wiring device 31 is also positioned at the outer side of the first water cooling plate 51, so that the isolation between the high-voltage power system and the low-voltage control system is further enhanced.

As shown in fig. 3 and 4, the frequency converter further includes a high voltage assembly 41 and a power capacitor 43, and the high voltage assembly 41 includes a pre-charging unit 413, a high voltage sampling unit 412, and the like. The precharge unit 413 may be turned on to charge the power capacitor 43 when the voltage of the power capacitor 43 is low, and may be turned off when the voltage of the power capacitor 43 is high. The high voltage sampling unit 412 may detect a voltage of the power capacitor. A power adapter 411 is further mounted above the high-voltage assembly 41, and the power adapter 411 is used for driving an IGBT, for example, a transistor such as an IGBT in the inverter unit 44. Since the high voltage assembly 41, the power capacitor 43, the pre-charging unit 413, the high voltage sampling unit 412 and the power adapter 411 are commercially available products and can be purchased directly, and the connection mode between these devices and the frequency converter also belongs to the prior art, they are not described herein again. It should be noted that the high voltage assembly 41 and the power capacitor 43 may be mounted on the bottom wall using the space inside the first and second water-cooled plates 51 and 52. The power capacitor 43 may be installed on the inner side of the second water cooling plate 52, so as to facilitate heat dissipation by the second water cooling plate 52, and is closer to the inverter unit 44, thereby facilitating reduction of stray interference.

Fig. 5 shows the left side wall of the frequency converter cabinet 3, which is in contact with the transformer cabinet 2 and comprises connection holes (not identified) for leading in cables from the transformer cabinet for connection to the inside of the frequency converter cabinet, and connection terminal strips 72 for internally connecting the frequency converters for supplying power to the frequency converters. The left side wall also comprises terminals and circuit breakers 74 with other voltage levels, which are used for supplying power with other voltage levels to the interior of the frequency converter cabinet 3, and the terminals and circuit breakers 74 with other voltage levels are not used for connecting the frequency converter body, but are used for connecting auxiliary equipment in the frequency converter, such as a fan 33 and an air conditioner and the like, and supplying alternating-current voltage (such as 220V alternating-current power or 380V alternating-current power) suitable for the operation of the fan 33 and the air conditioner.

As shown in fig. 3, in one embodiment, a heater 45 is further installed in the frequency converter cabinet 3, and the heater 45 is disposed on a right side wall of the frequency converter cabinet 3 for heating the frequency converter cabinet 3. The heater 45 and the air conditioner are used for temperature regulation inside the frequency converter cabinet 3, for example, the air conditioner can be started to heat when the weather is low, and the temperature inside the frequency converter cabinet is kept at a proper level; when the weather is colder, the air conditioner and the heater 45 can be turned on simultaneously to improve the heating capacity.

As shown in fig. 5, in one application scenario, the heater 45 is further configured with a heating control unit 71, and the heating control unit 71 is disposed on the left sidewall for controlling the heater 45, such as controlling the heater 45 to be turned on when the temperature is low and controlling the heater 45 to be turned off when the temperature is high. The heater 45 may use a heating wire as a heating component for heating, and the heating control unit 71 mainly includes a microprocessor and a temperature sensor, the temperature sensor samples the temperature inside the frequency converter cabinet 3, and the microprocessor is configured to generate a control signal according to the temperature information sampled by the temperature sensor. The heater 45 and the heating control unit 71 are well known in the art and may be implemented using commercially available products, and thus the detailed construction principle thereof will not be explained or illustrated in detail.

As shown in fig. 5, in one embodiment, a drying agent 73 is further disposed below the high voltage assembly 41 (i.e., between the high voltage assembly 41 and the bottom wall) for drying air in the frequency converter cabinet 3, so as to avoid corrosion of the cabinet body and influence on the electrical performance of the equipment caused by condensation due to overhigh humidity inside the frequency converter cabinet 3. In this embodiment, the drying agent 73 is disposed below the high-voltage assembly 41, which does not occupy the main space in the frequency converter cabinet 3, and is also beneficial to the maintenance and replacement of the working personnel.

According to a second aspect of the utility model, a power supply cabinet is also provided. In one embodiment, the power supply cabinet may be in the form of a structure as shown in fig. 1, comprising a frequency converter cabinet 3 arranged on the right side of the transformer cabinet 2. The left side wall of the frequency converter cabinet 3 is used for being connected with the transformer cabinet 2, and the right side wall is provided with a power line wiring device 32. The frequency converter cabinet 3 may employ the frequency converter cabinets of the various embodiments of the first aspect of the present invention described above.

The high-voltage power system and the low-voltage control system of the main circuit of the frequency converter are related in the frequency converter cabinet. In one embodiment, the power line wiring device of the high-voltage power system is arranged on the right side wall of the frequency converter cabinet, the control signal wiring device of the low-voltage control system is arranged at the joint of the rear side wall and the left side wall of the frequency converter cabinet, and the power line wiring device and the control signal wiring device are separated by the water cooling plate, so that the negative influence of the high-voltage power system on the low-voltage control system is avoided. In order to meet the requirement of temperature control, a water cooling plate is arranged in the frequency converter cabinet, and a heating element in the frequency converter is arranged on the water cooling plate, so that the heat dissipation of the frequency converter body is realized; an air conditioner and a heater are also arranged in the frequency converter cabinet to control the temperature of the air in the frequency converter cabinet; the fan is arranged in the frequency converter cabinet, so that the air circulation speed in the frequency converter cabinet can be adjusted, and the balance of the temperature in the frequency converter cabinet is facilitated. In general, the space in the whole frequency converter cabinet is fully utilized on the premise of meeting the electrical performance and the heat dissipation performance, so that the equipment layout is compact and reasonable, the volume of the whole power supply cabinet is smaller, and better electrical performance is embodied externally.

In the above description of the present specification, the terms "fixed," "mounted," "connected," or "connected," and the like, are to be construed broadly unless otherwise expressly specified or limited. For example, with the term "coupled", it can be fixedly coupled, detachably coupled, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship. Therefore, unless the specification explicitly defines otherwise, those skilled in the art can understand the specific meaning of the above terms in the present invention according to specific situations.

From the above description of the present specification, those skilled in the art will also appreciate that the terms "first" or "second", etc. used in the present specification to refer to a number or ordinal number are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present specification, "a plurality" means at least two, for example, two, three or more, and the like, unless specifically defined otherwise.

While various embodiments of the present invention have been shown and described herein, it will be obvious to those skilled in the art that such embodiments are provided by way of example only. Numerous modifications, changes, and substitutions will occur to those skilled in the art without departing from the spirit and scope of the present invention. It should be understood that various alternatives to the embodiments of the utility model described herein may be employed in practicing the utility model. It is intended that the following claims define the scope of the utility model and that the module compositions, equivalents, or alternatives falling within the scope of these claims be covered thereby.

Claims (10)

1. A frequency converter cabinet is internally used for mounting a frequency converter, the front side wall of the frequency converter cabinet is used for mounting a cabinet door, and the frequency converter cabinet is characterized in that,

at least a first water cooling plate is arranged in the frequency converter cabinet, one side of the first water cooling plate, which faces the cabinet door, is an inner side, and the other side of the first water cooling plate is an outer side;

and the frequency converter and the power line wiring device are arranged in the space on the inner side of the first water cooling plate, and the control signal wiring device is arranged in the space on the outer side of the first water cooling plate.

2. Frequency converter cabinet according to claim 1,

a second water cooling plate is also arranged in the frequency converter cabinet and is vertically butted with the first water cooling plate;

and a first power unit of the frequency converter is arranged on the inner side of the first water cooling plate, and a second power unit of the frequency converter is arranged on the inner side of the second water cooling plate.

3. Frequency converter cabinet according to claim 2,

the outer side of the second water cooling plate faces the right side wall of the frequency converter cabinet, and the power line wiring device is assembled on the right side wall.

4. The frequency converter cabinet according to claim 2, wherein the first power unit of the frequency converter is a rectifying unit and the second power unit of the frequency converter is an inverting unit.

5. The frequency converter cabinet according to claim 4, wherein said second water-cooled panel is further equipped with power capacitors on its inner side for filtering and stabilizing DC voltage.

6. Frequency converter cabinet according to claim 1, characterized in that a high voltage assembly is fitted on the bottom wall of the frequency converter cabinet.

7. The inverter cabinet of claim 6, wherein a desiccant is placed under the high voltage assembly for drying air within the inverter cabinet.

8. The inverter cabinet according to claim 3, wherein an air conditioner and a heater are further mounted on a right side wall of the inverter cabinet.

9. The frequency converter cabinet according to claim 8, characterized in that the frequency converter cabinet further comprises a left side wall arranged opposite to the right side wall, wherein a wiring hole is arranged on the left side wall, and the wiring hole is used for leading in a cable from the outside to connect the frequency converter.

10. A power supply cabinet comprising a line inlet cabinet, a transformer cabinet and a frequency converter cabinet according to any one of claims 1 to 9 connected in series.

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