Device and method for treating environment temperature of high-voltage frequency converter

Abstract

The invention relates to the technical field of high-voltage frequency converter temperature management, and discloses a high-voltage frequency converter environment temperature treatment device and method, and the device comprises a frequency converter cabinet, a plurality of groups of exhaust fans are symmetrically arranged at the two sides in the frequency converter cabinet, and a first heat dissipation assembly and a second heat dissipation assembly which are respectively provided with two groups of symmetrical exhaust fans are arranged. According to the device, a linkage mechanism of a heat dissipation system and temperature monitoring is established, monitoring data are accessed to an industrial control system according to the real-time temperature of a phase-shifting transformer and a power unit and are transmitted to a remote operation and maintenance platform through an industrial Ethernet, remote operation, monitoring, fault diagnosis and data analysis are supported, and when the temperature exceeds a set threshold value, the temperature is monitored. A double-air-duct top-end booster fan, a phase-shifting transformer cabinet and a power unit cabinet exhaust fan are automatically started, an upper computer sends out a pop-up early warning signal, high-power heat dissipation is achieved, operation and maintenance platform personnel use the pop-up early warning signal to prompt and arrange maintenance personnel to analyze the alarm fault of the high-voltage frequency converter, and closed-loop management is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of high-voltage frequency converter temperature management, in particular to a device and method for high-voltage frequency converter environmental temperature treatment. BACKGROUND

[0002] The high-voltage frequency converter is a common electrical equipment in industrial production, which generates a large amount of heat during operation. Since it is installed indoors, the indoor space is relatively closed, and the heat accumulation causes the indoor environmental temperature to rise, which is not conducive to the stable operation of the frequency converter and may affect other indoor equipment. If the heat cannot be effectively dissipated in time, the internal temperature of the frequency converter will be too high, thereby affecting the normal operation and service life of the frequency converter. Purely relying on indoor ventilation equipment cannot completely discharge the heat outside, so an indoor air conditioner is usually installed for heat dissipation, but the air conditioner has high energy consumption and limited heat dissipation effect. Insufficient heat dissipation efficiency and heat accumulation: the existing high-voltage frequency converter uses a cabinet top fan to exhaust air and discharge to the indoor through a double outlet, the heat dissipation path of the exhaust air is short, and the exhaust air is easy to flow back to the air inlet of the frequency converter, causing the environmental temperature in the high-voltage frequency converter cabinet to rise and form "heat accumulation" (see Figure 1 ), which causes the high-voltage frequency converter to overheat and trip or the power device to overheat and be damaged. Currently, three indoor air conditioners with a refrigeration power of 6.9KW are installed, which have low heat exchange efficiency and are difficult to reduce the indoor temperature, and cannot meet the environmental requirements of the high-voltage frequency converter operation. SUMMARY

[0003] In view of the deficiencies of the prior art, the present application provides a device and method for high-voltage frequency converter environmental temperature treatment, which has the advantages of analyzing high-voltage frequency converter alarm faults and temperature management, and solves the above technical problems.

[0004] To achieve the above purpose, the present application provides the following technical scheme: a device for high-voltage frequency converter environmental temperature treatment, comprising a frequency converter cabinet, a plurality of groups of air extraction fans are symmetrically arranged inside the frequency converter cabinet, in the environment where the frequency converter cabinet is located, two groups of first and second heat dissipation assemblies are arranged symmetrically, the frequency converter cabinet top is provided with a cabinet top fan, the output end of the cabinet top fan is provided with a hot air discharge assembly, the frequency converter cabinet top is also provided with a thermocouple for measuring the temperature of the environment where the frequency converter cabinet is located, and it is judged whether to start the first heat dissipation assembly.

[0005] As a preferred technical scheme of the present application, the first heat dissipation assembly is a vertical air conditioner, the second heat dissipation assembly comprises a ventilation opening opened on the closed boundary of the environment where the frequency converter cabinet is located, and filter cotton is arranged at the ventilation opening, and a rain shelter is correspondingly arranged outside the closed boundary of the environment where the frequency converter cabinet is located.

[0006] As a preferred embodiment of the present invention, the hot air exhaust assembly includes a filter steel mesh, a booster fan, an air duct support, a rectangular ventilation straight pipe, a rectangular ventilation 90-degree elbow, and a flange.

[0007] As a preferred embodiment of the present invention, the output end of the cabinet top fan is provided with a branching passage, and a rectangular ventilation straight pipe is connected to the horizontal end of the branching passage via a flange. A rectangular ventilation 90-degree elbow is connected to the top of the branching passage, and the output end of the rectangular ventilation 90-degree elbow is connected to another identical rectangular ventilation straight pipe horizontally via a flange.

[0008] As a preferred embodiment of the present invention, the rectangular ventilation duct is connected to the top of the closed boundary of the environment where the frequency converter cabinet is located through a duct support. Each of the rectangular ventilation straight pipes is connected to a booster fan at its output end. The ends of the rectangular ventilation straight pipes are bent downwards and equipped with a filter steel mesh.

[0009] As a preferred embodiment of the present invention, a cable trench is provided at the bottom of the frequency converter cabinet.

[0010] A method for controlling the ambient temperature of a high-voltage frequency converter, based on the aforementioned device for controlling the ambient temperature of a high-voltage frequency converter, includes the following steps: Step 1: After the inverter cabinet starts, the top fan of the cabinet will start synchronously and automatically; Step 2: When the thermocouple detects that the temperature exceeds the set threshold, the two booster fans and the exhaust fan are started simultaneously.

[0011] Compared with the prior art, the present invention provides a device and method for controlling the ambient temperature of a high-voltage frequency converter, which has the following beneficial effects: This invention establishes a linkage mechanism between the heat dissipation system and temperature monitoring. Based on the real-time temperature of the phase-shifting transformer and power unit, the monitoring data is connected to the industrial control system and transmitted to the remote operation and maintenance platform via industrial Ethernet. This supports remote operation, monitoring, fault diagnosis, and data analysis. When the temperature exceeds a set threshold, the dual-duct top booster fan, the exhaust fans of the phase-shifting transformer cabinet and the power unit cabinet are automatically activated, and the host computer issues a pop-up warning signal to achieve high-power heat dissipation. The operation and maintenance platform personnel use the pop-up warning signal to prompt and arrange maintenance personnel to analyze and troubleshoot the high-voltage frequency converter alarm faults, thus achieving closed-loop management. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the existing technology structure; Figure 2 This is a schematic diagram of the heat dissipation of the high-voltage frequency converter of the present invention; Figure 3 This is a schematic diagram of the rectangular ventilation straight pipe of the present invention; Figure 4This is a schematic diagram of a 90-degree bend in a rectangular duct of the present invention; Figure 5 This is a schematic diagram of the fan of the present invention; Figure 6 This is a schematic diagram of the thermocouple of the present invention; Figure 7 This is a schematic diagram illustrating the working principle of the present invention.

[0013] The components include: 1. Filter steel mesh; 2. Booster fan; 3. Air duct support; 31. Rectangular ventilation straight pipe; 32. Rectangular ventilation 90-degree elbow; 4. Flange; 5. Cabinet top fan; 6. Thermocouple; 7. Frequency converter cabinet; 8. Exhaust fan; 9. Vertical air conditioner; 10. Cable trench; 11. Filter cotton; 12. Canopy. Detailed Implementation

[0014] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0015] Please see Figures 1-6 A device for controlling the ambient temperature of a high-voltage frequency converter includes a frequency converter cabinet 7. Multiple sets of exhaust fans 8 are symmetrically arranged on both sides inside the frequency converter cabinet 7. In the environment where the frequency converter cabinet 7 is located, two sets of first heat dissipation components and second heat dissipation components are respectively symmetrically arranged for the exhaust fans 8. A cabinet top fan 5 is arranged at the top of the frequency converter cabinet 7. A hot air exhaust component is arranged at the output end of the cabinet top fan 5. A thermocouple 6 is also arranged at the top of the frequency converter cabinet 7 to measure the temperature of the environment where the frequency converter cabinet 7 is located and to determine whether to activate the first heat dissipation component.

[0016] The first heat dissipation component is a vertical air conditioner 9. The air conditioner starts cooling when the indoor temperature is above 23 degrees Celsius and stops cooling when it is below 18 degrees Celsius. The second heat dissipation component includes a ventilation opening at the closed boundary of the environment where the inverter cabinet 7 is located (if there is no ventilation opening, negative pressure will be formed indoors, resulting in poor heat dissipation) and a filter cotton 11 is installed at the ventilation opening (the outdoor air has a high dust content, and without the filter cotton, the indoor dust will be high). A canopy 12 is installed on the outside of the closed boundary of the environment where the inverter cabinet 7 is located (to prevent rainwater from entering the filter cotton and affecting the air intake).

[0017] The hot air exhaust assembly includes a steel filter mesh 1, a booster fan 2, an air duct support 3, a rectangular ventilation straight pipe 31, a rectangular ventilation 90-degree elbow 32, and a flange 4.

[0018] The top fan 5 has a branching passage at its output end, and a rectangular ventilation straight pipe 31 is connected to the horizontal end of the branching passage via a flange 4. A rectangular ventilation 90-degree elbow 32 is connected to the top of the branching passage. Another identical rectangular ventilation straight pipe 31 is connected to the horizontal output end of the rectangular ventilation 90-degree elbow 32 via a flange 4.

[0019] The rectangular ventilation duct 31 is connected to the top of the enclosed boundary of the environment where the frequency converter cabinet 7 is located through the air guide duct bracket 3; Each rectangular ventilation duct 31 is connected to a booster fan 2 at its output end. The end of the rectangular ventilation duct 31 is bent downward and is equipped with a filter steel mesh 1 (mainly to prevent small animals from entering the duct).

[0020] A cable trench 10 is provided at the bottom of the inverter cabinet 7.

[0021] A method for controlling the ambient temperature of a high-voltage frequency converter, based on the aforementioned device for controlling the ambient temperature of a high-voltage frequency converter, includes the following steps: Step 1: After the inverter cabinet 7 is started, the top fan 5 of the cabinet starts synchronously and automatically, and begins to exhaust and cool the electrical components in the phase-shifting transformer cabinet and power unit cabinet. Step 2: When thermocouple 6 detects that the temperature exceeds the set threshold, two booster fans 2 and exhaust fans 8 are started simultaneously. When the temperature of the phase-shifting transformer cabinet exceeds 80 degrees and the temperature of the power unit cabinet exceeds 60 degrees, the host computer issues a pop-up warning message, and the PLC module issues a command to start the dual-duct top booster fan. Similarly, for any one of the three transformer cabinets or two power unit cabinets (with five thermocouples installed) that exceeds the threshold, the corresponding air inlet exhaust fan in the cabinet is automatically started. When the temperature of the phase-shifting transformer cabinet is below 55 degrees and the temperature of the power unit cabinet is below 45 degrees, the PLC module issues a command to stop the dual-duct top booster fan and the air inlet exhaust fan in the cabinet, and the host computer issues a pop-up message that the equipment is operating normally.

[0022] A linkage mechanism between the heat dissipation system and temperature monitoring is established. Based on the real-time temperature of the phase-shifting transformer and power unit, the monitoring data is connected to the industrial control system and transmitted to the remote operation and maintenance platform via industrial Ethernet. This supports remote operation, monitoring, fault diagnosis, and data analysis. When the temperature exceeds the set threshold, the dual-duct top booster fan 2 and the exhaust fans 8 of the phase-shifting transformer cabinet and power unit cabinet are automatically activated, and the host computer issues a pop-up warning signal to achieve high-power heat dissipation. The operation and maintenance platform personnel use the pop-up warning signal to prompt and arrange maintenance personnel to analyze and troubleshoot the high-voltage frequency converter alarm faults, thereby achieving closed-loop management. Comparison of effects before and after improvement: (1) This invention connects the high-voltage frequency converter to the outdoor environment via a heat dissipation duct, enabling the direct exhaust of heat generated by the frequency converter to the outdoors. This effectively reduces the indoor ambient temperature and minimizes the impact of heat on indoor equipment. Before installation, the temperature inside the frequency converter power cabinet was 38 degrees Celsius; the temperature of phase A of the frequency converter's phase-shifting transformer was 58 degrees Celsius; the temperature of phase B was 60.1 degrees Celsius; and the temperature of phase C was 58 degrees Celsius. After treatment, the temperature inside the frequency converter power cabinet was 33 degrees Celsius; the temperature of phase A of the frequency converter's power unit was 49.6 degrees Celsius; the temperature of phase B was 49 degrees Celsius; and the temperature of phase C was 47 degrees Celsius. The temperature decreased by 5 to 11 degrees Celsius, significantly reducing the operating ambient temperature of the frequency converter.

[0023] (2) The rationally designed dual air duct improves heat dissipation efficiency, and the closed-loop enhanced heat dissipation system improves the suitable operating temperature environment for the frequency converter.

[0024] (3) When the indoor temperature rises in summer, the air conditioner can automatically turn on the cooling function to create a low-temperature air environment for the high-voltage inverter air inlet, so that it is not affected by the external environment and can operate stably in a wider range of regions and working conditions.

[0025] Installing air ducts saves electricity: The inverter room is equipped with three 6.9KW industrial air conditioners. Based on the annual usage of the air conditioners, it can be calculated that the three air conditioners are shut down for three months in winter, one is turned on for six months in spring and autumn, and all are turned on for three months in summer.

[0026] Each air conditioner has a power of 6.9KW, and there are a total of 3 units.

[0027] Winter electricity savings (6.9KW × 24 hours × 3 months × 3 units = 44712 ​​kWh); Electricity saved in spring and autumn (6.9KW × 24 hours × 6 months × 2 units = 59616 kWh); Annual electricity savings: 44712 ​​+ 59616 = 10438 kWh; This is equivalent to 10,438 yuan × 0.62 yuan = 64,683 yuan.

[0028] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for controlling the ambient temperature of a high-voltage frequency converter, comprising a frequency converter cabinet (7), characterized in that: The inverter cabinet (7) has multiple sets of exhaust fans (8) symmetrically arranged on both sides inside. In the environment where the inverter cabinet (7) is located, there are two sets of first heat dissipation components and second heat dissipation components symmetrically arranged by the exhaust fans (8). The top of the inverter cabinet (7) is equipped with a cabinet top fan (5). The output end of the cabinet top fan (5) is equipped with a hot air exhaust component. The top of the inverter cabinet (7) is also equipped with a thermocouple (6) to measure the temperature of the environment where the inverter cabinet (7) is located and to determine whether to start the first heat dissipation component.

2. The device for controlling the ambient temperature of a high-voltage frequency converter according to claim 1, characterized in that: The first heat dissipation component is a vertical air conditioner (9), and the second heat dissipation component includes a ventilation opening at the closed boundary of the environment where the inverter cabinet (7) is located, and a filter cotton (11) is provided at the ventilation opening. A canopy (12) is provided on the outside of the closed boundary of the environment where the inverter cabinet (7) is located.

3. The device for controlling the ambient temperature of a high-voltage frequency converter according to claim 1, characterized in that: The hot air exhaust assembly includes a filter steel mesh (1), a booster fan (2), an air duct support (3), a rectangular ventilation straight pipe (31), a rectangular ventilation 90-degree elbow (32), and a flange (4).

4. The device for controlling the ambient temperature of a high-voltage frequency converter according to claim 3, characterized in that: The cabinet top fan (5) has a branching passage at its output end, and a rectangular ventilation straight pipe (31) is connected to the horizontal end of the branching passage via a flange (4). A rectangular ventilation 90-degree elbow (32) is connected to the top of the branching passage. The output end of the rectangular ventilation 90-degree elbow (32) is connected to another identical rectangular ventilation straight pipe (31) via a flange (4).

5. The device for controlling the ambient temperature of a high-voltage frequency converter according to claim 4, characterized in that: The rectangular ventilation duct (31) is connected to the top of the enclosed boundary of the environment where the frequency converter cabinet (7) is located through the air guide duct bracket (3); Each of the rectangular ventilation straight pipes (31) is connected to a booster fan (2) at its output end. The end of the rectangular ventilation straight pipe (31) is bent downward and is equipped with a filter steel mesh (1).

6. The device for controlling the ambient temperature of a high-voltage frequency converter according to claim 1, characterized in that: The bottom of the inverter cabinet (7) is provided with a cable trench (10).

7. A method for controlling the ambient temperature of a high-voltage frequency converter, based on the device for controlling the ambient temperature of a high-voltage frequency converter as described in any one of claims 1-6, characterized in that: Includes the following steps: Step 1: After the inverter cabinet (7) is started, the top fan (5) of the cabinet will start synchronously; Step 2: When the thermocouple (6) detects that the temperature exceeds the set threshold, the two booster fans (2) and the exhaust fan (8) are started simultaneously.

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