CN109346954B - A Transformer Room Temperature Controlled Automatic Heat Dissipation Circulation System - Google Patents
A Transformer Room Temperature Controlled Automatic Heat Dissipation Circulation System Download PDFInfo
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- CN109346954B CN109346954B CN201811291624.8A CN201811291624A CN109346954B CN 109346954 B CN109346954 B CN 109346954B CN 201811291624 A CN201811291624 A CN 201811291624A CN 109346954 B CN109346954 B CN 109346954B
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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
- H02B1/56—Cooling; Ventilation
- H02B1/565—Cooling; Ventilation for cabinets
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Abstract
An automatic heat dissipation circulating system for temperature control of a transformer room belongs to the field of indoor temperature control. A vertical equipment compartment is arranged outside a transformer chamber, and a square opening is arranged on a separation wall between the equipment compartment and the transformer chamber; the air inlet of the centrifugal fan is directly sleeved in the square opening; the centrifugal fan, the metal air outlet pipeline and the fan control module are arranged in the vertical equipment compartment; the air outlet of the centrifugal fan is reformed to be vertical to the axial lead of the fan impeller; turning the right angle in the metal air-out pipeline into arc pipeline structure for the modification, reducing the right angle bend that appears among the air exhaust process, reduced the loss of air flow in-process, improved the air current and passed through efficiency. The hot air is directly discharged through the centrifugal force of the centrifugal fan to the maximum extent, so that the heat dissipation efficiency of the transformer chamber is improved; the problem that the transformer chamber is too deep and the transformer is far away from the air inlet louver and the air outlet louver can be solved; the method can be widely applied to the field of design of transformer room cooling systems.
Description
Technical Field
The invention belongs to the field of indoor temperature control, and particularly relates to an automatic heat dissipation circulating system for a transformer room.
Background
With the continuous improvement of the living standard of residents and the continuous increase of electricity consumption in life and production in summer, the load born by the transformer of the transformer substation is high in innovation. According to statistics of 35KV transformer substations in the jurisdiction range of a central station in a certain area in recent 2 years, during the peak-meeting summer period, nearly 30 main transformers are in an overload operation state every day every year; wherein the oil temperature of the upper layer of 16 main transformer bodies exceeds 80 ℃ and is signaled. Therefore, the temperature regulation of the main transformer chamber of the transformer substation becomes a problem to be solved urgently in the first line of power transformation operation and maintenance production.
At present, the traditional cooling method of a main transformer chamber comprises the following steps:
forming air convection natural cooling through shutters around a main transformer chamber;
secondly, high-power fans are arranged around the main transformer body to accelerate air circulation around the main transformer;
and thirdly, a fan is arranged below the main transformer radiating fins to accelerate the heat evaporation of the radiating fins.
The existing traditional cooling methods have disadvantages and can not meet the cooling requirement of a main transformer with sharply increased load:
the first method has a disadvantage in that the effective area of the ventilation window of the transformer room is insufficient due to the limitation of the civil structure of the transformer room. The size of a transformer room in a newly-built transformer station is limited by the column distance of the whole building, the depth of some transformer rooms is too deep, and the transformer is far away from the positions of the air inlet and outlet louvers, so that the ventilation effect around the transformer is weakened. Meanwhile, as the shutter on the upper part of the transformer chamber is easy to accumulate dust to block the air circulation, but is limited by the difficulty in cleaning the safety distance between an operator and the transformer bus bar, the air flow efficiency in the main transformer chamber is greatly reduced.
The second method has the disadvantages that the placement of the fan and the starting and stopping of the fan need to be manually controlled, and more manpower needs to be used every day during the peak-meeting summer crossing. Because the function of the fan is limited to driving the indoor hot air to circulate, cold and hot air flow exchange cannot be formed. And four high-power fans are started simultaneously, and the heat emitted by the running of the motor is not small, so that the method for placing the high-power fans consumes manpower and cannot realize high heat dissipation efficiency.
The third method has disadvantages in that the fan installed under the heat sink requires a secondary circuit for voltage transformation for maintenance and repair, which is very inconvenient. Meanwhile, the method can not form hot and cold air convection, the cooling efficiency is not high, and the cost performance is low compared with the maintenance cost.
In the national standard diagram, the area of a transformer ventilation window is given as an effective area, and the effective coefficient of the area of the ventilation window is smaller than 1. However, the difference between the area and the effective area is not noticed in the design of the existing partial transformer substation, conditions are provided for civil engineering according to the area required in the standard diagram during design, the area of the ventilation window of the transformer room is reduced again in practice, and the area of the ventilation window does not meet the operation conditions of the transformer. The size of a transformer room in a newly-built transformer station is limited by the column distance of the whole building, the depth of some transformer rooms is too deep, and the transformer is far away from the positions of the air inlet and outlet louvers, so that the ventilation effect around the transformer is weakened. At present, although an exhaust fan is additionally arranged beside an air outlet shutter of a transformer room for forced ventilation, the efficiency of the exhaust fan is not fully exerted because the air flow of the exhaust fan and the air flow of the air outlet shutter are relatively strong and the convection of cold air and hot air cannot be effectively formed.
The transformer is in the operation in-process room air heated, and the hot-air rises and business turn over wind shutter constitutes the air current passageway that flows, and business turn over wind shutter difference in height is bigger, and the air flow speed is faster, and the ventilation effect is better. However, the shutter on the upper part of the transformer chamber is easy to accumulate dust to block air circulation, but is limited by the difficulty in cleaning the safety distance between an operator and the transformer busbar, so that the air flow efficiency in the main transformer chamber is greatly reduced.
In actual work, a set of circulation system capable of automatically dissipating heat of the main transformer chamber and capable of adapting to the situations is urgently needed, so that the cooling function of the main transformer chamber is more efficient and economical.
Disclosure of Invention
The invention aims to provide a transformer room temperature control automatic heat dissipation circulation system. It improves and optimizes centrifugal fan air outlet position, reforms the centrifugal fan air outlet of original and centrifugal fan air intake on same water flat line into perpendicular form, changes the elbow bend of metal air-out pipeline into arc pipeline structure, directly discharges the hot-air through centrifugal fan's centrifugal force, has improved the radiating efficiency of main room that becomes.
The technical scheme of the invention is as follows: the utility model provides an automatic heat dissipation circulation system of transformer room control by temperature change, including centrifugal fan, metal air-out pipeline, temperature sensor and fan control module, its temperature sensor sets up in the transformer room, characterized by:
arranging a vertical equipment compartment outside a transformer chamber, and arranging a square opening on a partition wall between the equipment compartment and the transformer chamber;
arranging a centrifugal fan, a metal air outlet pipeline and a fan control module in a vertical equipment compartment;
the air inlet of the centrifugal fan is directly sleeved in the square opening;
the air outlet of the centrifugal fan is reformed to be vertical to the axis of the fan impeller, so that the air outlet of the centrifugal fan is arranged in the direction vertical to the central axis of the fan impeller, hot air is directly discharged through the centrifugal force of the centrifugal fan, and the heat dissipation efficiency of the transformer chamber is improved;
the metal air outlet pipeline is vertically arranged in the equipment compartment and extends out of the equipment compartment through an arc-shaped elbow pipeline structure, so that right-angle bends in the air exhaust process are reduced, loss in the air flowing process is reduced, and the air flow passing efficiency is improved;
the air outlet of the metal air outlet pipeline is arranged outside the equipment compartment;
taking a shutter of a transformer room as a total air inlet of the transformer room temperature control automatic heat dissipation circulating system;
taking an air outlet of the metal air outlet pipeline as a main air outlet of the transformer room temperature control automatic heat dissipation circulating system;
the transformer is arranged between the shutter of the transformer chamber and the square opening on the isolation wall, and outdoor cold air enters the transformer chamber from the shutter, passes through the space above the transformer, and is discharged out of the chamber through the square opening on the isolation wall, the centrifugal fan, the metal air outlet pipeline and the air outlet of the metal air outlet pipeline;
the automatic heat dissipation circulation system for temperature control of the transformer room solves the problems that the transformer room is too deep and the transformer is far away from the air inlet louver and the air outlet louver by arranging the vertical equipment compartment on the side surface of the transformer room.
Specifically, the mechanical air exhaust volume of the centrifugal fan is calculated according to the following formula:
G4＝G2*(1-k)
wherein G4 is the mechanical air discharge capacity, G2 is the total air discharge capacity, k is the proportion of the area of the louver with the natural air inlet and outlet of the transformer chamber to the total louver area, and the value is taken according to the ratio of 1:2, thus the mechanical air discharge capacity of the centrifugal fan can be obtained.
Furthermore, the temperature measuring sensor is arranged above the transformer.
Compared with the prior art, the invention has the advantages that:
1. the air outlet of the centrifugal fan is reformed to be vertical to the axis of the fan impeller, so that hot air is directly discharged to the maximum extent through the centrifugal force of the centrifugal fan, and the heat dissipation efficiency of the transformer chamber is improved;
2. the vertical equipment compartment is arranged on the side surface of the transformer chamber, so that the problems that the depth of the transformer chamber is too deep and the transformer is far away from the air inlet louver and the air outlet louver can be solved;
3. the right-angle turning in the metal air outlet pipeline is modified into an arc-shaped pipeline structure, so that the loss in the air flowing process is reduced, and the air flow passing efficiency is improved.
Drawings
Fig. 1 is a schematic view of an air outlet duct structure of a conventional centrifugal fan;
FIG. 2 is a schematic view of the air outlet duct structure of the centrifugal fan of the present invention;
fig. 3 is a schematic diagram of the system architecture of the present invention.
In the figure, 1 is a centrifugal fan, 1-1 is an air inlet of the centrifugal fan, 1-2 is an air outlet of the centrifugal fan, 2 is a metal air outlet pipeline, 2-1 is a right-angle turn, 2-2 is an arc pipeline structure, 3 is a separation wall, 4 is a transformer chamber, 5 is a square opening, 6 is an air outlet of the metal air outlet pipeline, and 7 is a shutter.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
In fig. 1, a centrifugal fan air inlet 1-1 and a centrifugal fan air outlet 1-2 of a traditional centrifugal fan 1 are on the same horizontal line, and the structure of the centrifugal fan is improved by the technical scheme.
According to the working principle of the centrifugal fan, gas is concentrated around the wall of the pipeline under the action of centrifugal force, when the gas meets a right-angle bend in the air circulation process, the air flow direction changes to generate a vortex, and the friction between the air and the pipeline is increased. The right angle bend becomes more resistant to gas, resulting in increased on-way pressure loss.
The calculation shows that under the same cross-sectional area and pressure, the right-angle air channel can reduce the ventilation flow by 20%, and the serious loss can greatly reduce the ventilation efficiency of the main transformer chamber.
In order to reduce the loss, in fig. 2, in the technical scheme, the centrifugal fan air outlet 1-2 which is originally on the same horizontal line with the centrifugal fan air inlet 1-1 is changed into a vertical arrangement with the axial lead of the centrifugal fan impeller, so that a right-angled bend occurring in the air exhaust process can be reduced, the loss in the air flowing process is reduced, and the heat dissipation efficiency of the main transformer chamber is improved.
In fig. 3, the technical solution of the present invention provides an automatic heat dissipation circulation system for temperature control of a transformer room, which includes a centrifugal fan 1, a metal air outlet pipeline 2, a temperature measurement sensor and a fan control module, and the invention is characterized in that:
arranging a temperature measuring sensor in a transformer chamber;
a vertical equipment compartment is arranged outside the transformer room, and a square opening 5 is arranged on a separation wall 3 between the equipment compartment and the transformer room 4;
the air inlet 1-1 of the centrifugal fan is directly sleeved in the square opening;
arranging a centrifugal fan, a metal air outlet pipeline and a fan control module in a vertical equipment compartment;
the air outlet 1-2 of the centrifugal fan, which is originally on the same horizontal line with the air inlet 1-1 of the centrifugal fan, is reformed into a vertical shape, and hot air is directly discharged through the centrifugal force of the centrifugal fan, so that the heat dissipation efficiency of the transformer chamber is improved;
the metal air outlet pipeline is vertically arranged in the equipment compartment and transversely extends out of the equipment compartment through an arc pipeline structure, so that right-angle bends in the air exhaust process are reduced, the loss in the air flowing process is reduced, and the air flow passing efficiency is improved; and the air outlet of the metal air outlet pipeline is arranged outside the equipment compartment.
Further, the air outlet of the centrifugal fan is arranged in the direction perpendicular to the central axis of the impeller of the centrifugal fan.
Specifically, the mechanical air exhaust volume of the centrifugal fan is calculated according to the following formula:
G4＝G2*(1-k)
wherein G4 is the mechanical air discharge capacity, G2 is the total air discharge capacity, k is the proportion of the area of the louver with the natural air inlet and outlet of the transformer chamber to the total louver area, and the value is taken according to the ratio of 1:2, thus the mechanical air discharge capacity of the centrifugal fan can be obtained.
Specifically, a louver of the transformer chamber is used as a total air inlet of the transformer chamber temperature control automatic heat dissipation circulation system.
Specifically, an air outlet of the metal air outlet pipeline is used as a total air outlet of the transformer room temperature control automatic heat dissipation circulating system.
Furthermore, the transformer is arranged between the shutter of the transformer chamber and the square opening on the isolation wall, and outdoor cold air enters the transformer chamber from the shutter, passes through the space above the transformer, and is discharged out of the room through the square opening on the isolation wall, the centrifugal fan, the metal air outlet pipeline and the air outlet of the metal air outlet pipeline.
Furthermore, the temperature measuring sensor is arranged above the transformer.
The fan control module in the technical scheme is composed of a temperature sensor module, an RS trigger module and a vector control module. The temperature sensor module is responsible for detecting the ambient temperature above a transformer chamber (also called a main transformer chamber) and feeding the ambient temperature back to the control loop in real time. The RS trigger module can realize that the control module starts the fan when the ambient temperature rises to 40 ℃; when the ambient temperature is reduced to 35 ℃, the control module turns off the fan. The vector control module realizes the automatic adjustment of the fan power according to the field temperature.
After the technical scheme is adopted, for a certain transformer substation, the indoor temperature of the main transformer is compared on a day with the temperature, the load current and the transformer temperature close to each other in two years, so that the indoor temperature of the main transformer is obviously reduced after the automatic heat dissipation circulation system is used, and a better cooling effect and an expected technical effect are obtained.
| Date | Temperature of the day | Load current | Temperature of transformer | Indoor temperature |
| 2016 (8 months) and 22 days | 32℃ | 963A | 78℃ | 56℃ |
| 8 and 16 months in 2017 | 32℃ | 958A | 68℃ | 41℃ |
Due to the technical scheme, the air outlet position of the centrifugal fan is improved; the vertical equipment compartment is arranged on the side surface of the transformer chamber, so that the problems that the depth of the transformer chamber is too deep and the transformer is far away from the air inlet louver and the air outlet louver are solved; the right-angle turning in the metal air outlet pipeline is modified into an arc-shaped pipeline structure, so that the loss in the air flowing process is reduced, the air flow passing efficiency is improved, and the radiating efficiency of a main transformer chamber is improved.
The invention can be widely applied to the design field of various transformer room ventilation cooling systems.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811291624.8A CN109346954B (en) | 2018-10-31 | 2018-10-31 | A Transformer Room Temperature Controlled Automatic Heat Dissipation Circulation System |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811291624.8A CN109346954B (en) | 2018-10-31 | 2018-10-31 | A Transformer Room Temperature Controlled Automatic Heat Dissipation Circulation System |
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| CN109346954A CN109346954A (en) | 2019-02-15 |
| CN109346954B true CN109346954B (en) | 2021-02-09 |
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| CN119381941B (en) * | 2024-10-24 | 2026-01-27 | 国网河南省电力公司电力科学研究院 | Functional sectional noise reduction ventilation system for electric power facility and control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7279659B2 (en) * | 2004-09-01 | 2007-10-09 | Western Industries, Inc. | Non-food warmer appliance |
| KR200439688Y1 (en) * | 2007-02-23 | 2008-04-28 | 김형호 | Ventilation system of building using geothermal |
| CN201844487U (en) * | 2010-09-29 | 2011-05-25 | 中铁第四勘察设计院集团有限公司 | Tunnel wet curtain air supply and temperature reduction system |
| CN202251022U (en) * | 2011-08-31 | 2012-05-30 | 浙江钜联风能机械有限公司 | Accelerating elbow joint of ventilator |
| CN204987350U (en) * | 2015-06-19 | 2016-01-20 | 国家电网公司 | Capacitor chamber inductions aeration cooling system |
| CN205407047U (en) * | 2016-03-09 | 2016-07-27 | 国家电网公司 | Dampproofing dehydrating unit in transformer substation hyperbaric chamber |
| CN207377176U (en) * | 2017-06-16 | 2018-05-18 | 天津中昂地产有限公司 | The comfortable house type that three Room, two Room two in a kind of four main room spaces towards south is defended |
| CN207761975U (en) * | 2017-09-05 | 2018-08-24 | 广州祥烽机电设备有限公司 | A kind of high temperature resistant centrifugal blower |
| CN207218090U (en) * | 2017-09-22 | 2018-04-10 | 张来春 | A kind of vibration-damping radiating mobile model outdoor electricity distribution cabinet |
| CN207765808U (en) * | 2018-01-02 | 2018-08-24 | 贵州新中盟机电设备有限公司 | A kind of power distribution cabinet of good heat dissipation effect |
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