CN113889887A - Heat dissipation method for transformer room of box-type substation - Google Patents

Heat dissipation method for transformer room of box-type substation Download PDF

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Publication number
CN113889887A
CN113889887A CN202111320879.4A CN202111320879A CN113889887A CN 113889887 A CN113889887 A CN 113889887A CN 202111320879 A CN202111320879 A CN 202111320879A CN 113889887 A CN113889887 A CN 113889887A
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transformer
box
heat
axial flow
transformer room
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韩宇
杨艳芳
张威
童言
王海光
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Zhongye Northwest Engineering Technology Co ltd
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Zhongye Northwest Engineering Technology Co ltd
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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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
    • H02B1/26—Casings; Parts thereof or accessories therefor
    • H02B1/28—Casings; Parts thereof or accessories therefor dustproof, splashproof, drip-proof, waterproof or flameproof
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
    • H02B1/26—Casings; Parts thereof or accessories therefor
    • H02B1/46—Boxes; Parts thereof or accessories therefor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
    • H02B1/26—Casings; Parts thereof or accessories therefor
    • H02B1/46—Boxes; Parts thereof or accessories therefor
    • H02B1/48—Mounting of devices therein
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S10/00—PV power plants; Combinations of PV energy systems with other systems for the generation of electric power
    • H02S10/10—PV power plants; Combinations of PV energy systems with other systems for the generation of electric power including a supplementary source of electric power, e.g. hybrid diesel-PV energy systems
    • H02S10/12—Hybrid wind-PV energy systems
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20—End-user application control systems

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Patch Boards (AREA)

Abstract

The invention relates to a heat dissipation method for a transformer room of a box-type substation, which comprises the following steps: calculating the heat productivity of the transformer according to the power of the indoor transformer; arranging a plurality of axial flow fans, and calculating ventilation quantity required for eliminating heat in the transformer room when a comprehensive air exhaust mode is adopted; and according to the indoor temperature standard value, combining the heat productivity and the ventilation quantity to obtain the number of the axial flow fans needing to be started. The heat dissipation method for the box-type substation transformer room can improve the heat dissipation effect of the box-type substation transformer room.

Description

Heat dissipation method for transformer room of box-type substation
Technical Field
The invention belongs to the technical field of heat dissipation, and particularly relates to a heat dissipation method for a transformer room of a box-type substation.
Background
With the rapid development of Chinese economy, the living standard of people is continuously improved, the demand of people on power supply is increased day by day, and various transformer substations with different capacities and specifications enter the visual field of people. The transformer substation has multiple functions of receiving and distributing electric energy, converting and adjusting voltage, controlling electric power flow direction and the like, and is very important electric power equipment in an electric power system. Generally, the transformer substation is classified according to functions, workplaces and voltage grades, a box-type transformer substation is one of the transformer substations, and the transformer substation has the characteristics of strong set, high reliability, short construction period, land occupation saving and the like, and is widely applied to construction and transformation of national urban and rural power grids.
The box-type substation arranges the transformer, the high-voltage switch and control equipment, the low-voltage switch and control equipment, the internal wiring, the metering, the compensation, the lightning arrester and other auxiliary equipment in a public shell or a group of shells, and is communicated with the external environment by virtue of the ventilation opening on the wall surface of the box body, so that the rooms are relatively independent and mutually influenced. Due to the fact that the internal structure of the box-type substation is compact, when a transformer and other equipment normally operate, electromagnetic loss and load loss are inevitably generated, the heat effect caused by the electromagnetic loss and the load loss is the main reason for the temperature rise of all the equipment in the box-type substation and the ambient air, breakdown and aging of an internal insulation structure are easily caused by overhigh temperature, and the operation life and the working efficiency of the box-type substation are serious.
The box-type substation requires better performances of wind resistance, rain resistance, dust resistance, insect resistance and the like. Therefore, the housing is generally a closed housing. The traditional heat dissipation measure is that a plurality of louver type ventilation holes are formed in a transformer chamber, axial flow fans are arranged in the chamber and at the top of the transformer chamber (some transformers are provided with the axial flow fans), and heat in the chamber of the box-type substation is dissipated into the air through a plurality of long and narrow heat dissipation gaps around the top of a housing of the box-type substation. In China, some manufacturers change the material of the top of the shell into a titanium plate to prevent radiation, and make the top of the shell into a sandwich structure for heat insulation. Due to the sealing property of the shell of the box-type transformer substation, the air duct trend is relatively tortuous, the opening of the air duct is narrow, and the thermal resistance is relatively large. By utilizing the traditional forced air cooling mode, the heat in the transformer room is difficult to dissipate. Therefore, theoretically, it is difficult to fundamentally alleviate the heat dissipation problem by changing the material and structure of the housing.
Disclosure of Invention
In order to solve all or part of the problems, the invention aims to provide a heat dissipation method for a transformer room of a box-type substation, so as to improve the heat dissipation effect of the transformer room of the box-type substation.
The application provides a heat dissipation method for a transformer room of a box-type substation, which comprises the following steps: calculating the heat productivity of the transformer according to the power of the indoor transformer; arranging a plurality of axial flow fans, and calculating ventilation quantity required for eliminating heat in the transformer room when a comprehensive air exhaust mode is adopted; and according to the indoor temperature standard value, combining the heat productivity and the ventilation quantity to obtain the number of the axial flow fans needing to be started.
In some embodiments, the heat generation of the transformer is given by the following formula:
Q＝(1-η1)·η2phi. W; wherein eta is1Is the efficiency of the transformer, η2Phi is the transformer power factor and W is the transformer power (kVA) for the transformer load factor.
In some embodiments, the transformer efficiency is 0.98; the value range of the transformer load factor is 0.7 to 0.8; the value range of the transformer power factor is 0.9 to 0.95.
In some embodiments, the ventilation is given by the following equation:
Figure BDA0003345108030000021
wherein L is ventilation air exchange (m)3H); q is the calorific value (W) of the transformer; t is tpDesigning temperature (DEG C) for indoor exhaust; t is tsIs the blast temperature (. degree. C.).
In some embodiments, the axial flow fan is a wall axial flow fan having a ventilation air flow of 900m3The electrical parameter of the wall type axial flow fan is AC24V/50W。
In the embodiment, the relation between the heat productivity and the ventilation quantity can be accurately obtained through calculation, so that the indoor temperature of the transformer can be effectively reduced.
In some embodiments, further comprising: detecting the temperature of the transformer through a temperature sensor; the temperature sensor and the axial flow fan are electrically connected, and the start and stop of any axial flow fan are controlled according to the temperature of the transformer.
In some embodiments, the transformer chamber comprises a natural air inlet, an air outlet and an air duct arranged in the transformer chamber, the natural air inlet is located at a position below a transformer in the transformer chamber, the air outlet is uniformly arranged in the transformer chamber, the air duct is arranged close to the transformer, one end of the air duct is connected with the air outlet, and a plurality of air inlets are formed in the air duct. The axial flow fan is arranged at the position of the air outlet and used for extracting indoor heat, and the natural wind inlet is provided with a shutter with a rainproof function.
In the embodiment, the air duct and the axial flow fan are arranged, so that the heat pump fan has the advantages of high thermal response speed, large heat transmission capacity, relatively small electric power of the fan, low energy consumption and the like. In addition, because the natural air inlet adopts rain-proof tripe, can also improve box-type substation's sealed effect.
In some embodiments, the method further comprises supplying power to the axial flow fan through a wind-solar hybrid power supply system.
In some embodiments, the wind-solar hybrid power supply system comprises a wind generating set and/or a solar photovoltaic battery pack and/or a storage battery for supplying power to the axial flow fan.
In the embodiment, the relatively stable output can be obtained by utilizing the complementarity of wind energy and solar energy, and the system has higher stability and reliability; under the condition of ensuring the same power supply, the capacity of the energy storage battery can be greatly reduced.
The heat dissipation method for the transformer room of the box-type substation has the following advantages:
1) the relation between the heat productivity and the ventilation quantity can be accurately obtained through calculation, so that the indoor temperature of the transformer can be effectively reduced;
2) by arranging the air duct and the axial flow fan, the heat pump air conditioner has the advantages of high thermal response speed, large heat transfer capacity, relatively small electric power of the fan, low energy consumption and the like;
3) the natural air inlet adopts the rainproof shutter, so that the sealing effect of the transformer chamber can be improved;
4) by utilizing the complementarity of wind energy and solar energy, stable output can be obtained, and the system has high stability and reliability; under the condition of ensuring the same power supply, the capacity of the energy storage battery can be greatly reduced.
Drawings
Fig. 1 is a schematic flow chart of a method for dissipating heat in a transformer room of a box-type substation according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a transformer chamber according to an embodiment of the present invention;
fig. 3 is a side view of the box substation shown in fig. 2.
Detailed Description
In order to better understand the purpose, structure and function of the present invention, a method for dissipating heat from a transformer room of a box-type substation according to the present invention is described in further detail below with reference to the accompanying drawings.
Fig. 1 is a schematic flow chart of a method 100 for dissipating heat from a transformer room of a box-type substation according to an embodiment of the present invention; fig. 2 is a schematic structural diagram of a transformer chamber 200 according to an embodiment of the present invention. Referring to fig. 1 and 2, the present application provides a method 100 for dissipating heat from a transformer room of a box-type substation, which includes the steps of: s01, calculating the heat productivity of the transformer 1 according to the power of the indoor transformer 1; s02, arranging a plurality of axial flow fans 2, and calculating ventilation volume required for eliminating heat in the transformer room when a comprehensive air exhaust mode is adopted; and S03, combining the heat productivity and the ventilation quantity according to the indoor temperature standard value to obtain the number of the axial flow fans 2 needing to be started.
The reference value for the indoor temperature in the present application is generally understood to mean that the indoor temperature of the transformer 1 is about 40 ℃. The full-scale air exhaust mode mentioned in the present application refers to an air exhaust mode of the axial flow fan 2 in a full power state and in a fully open air inlet state. The number of axial fans 2 mentioned in the present application may be two or more. The combined heat generation amount and the ventilation amount referred to in the present application mean the combined heat generation amount to obtain a required ventilation amount so that the temperature in the room can be reduced to a standard value. When the heat dissipation method 100 for the transformer room of the box-type substation, provided by the invention, is used specifically:
in step S01, the heat value of the transformer 1 is calculated according to the power of the indoor transformer 1, wherein the heat value of the transformer 1 can be obtained by the following formula (formula one):
Q＝(1-η1)·η2phi · W (formula one);
wherein eta is1Is the efficiency of the transformer, η2Phi is the transformer power factor and W is the transformer power (kVA) for the transformer load factor. In some preferred embodiments, the transformer efficiency η1Can be 0.98; load factor eta of transformer2Can range from 0.7 to 0.8; the value range of the power factor phi of the transformer is 0.9 to 0.95.
In the step of S02, a plurality of axial fans 2 are provided, and the ventilation amount required for removing heat in the transformer room when the full-area air discharge mode is adopted is calculated, where the ventilation amount can be obtained by the following formula (formula two):
Figure BDA0003345108030000051
wherein L is ventilation air exchange (m)3H); q is the calorific value (W) of the transformer; t is tpDesigning temperature (DEG C) for indoor exhaust; t is tsIs the blast temperature (. degree. C.).
In connection with the above, it is now exemplified by specific numerical values.
The standard value of the indoor temperature of the transformer room (namely, the indoor temperature of the transformer room) is set to be 40 ℃, and when the indoor temperature of the transformer room is higher than 40 ℃, the exhaust fan (namely, the axial flow fan 2) is started to exhaust air and cool the indoor. The transformer power W of the transformer is 630kVA and the transformer efficiency eta10.98; transformer deviceLoad rate eta20.7; the transformer power factor phi is 0.9. Substituting the numerical value according to the formula one above to obtain:
Figure BDA0003345108030000052
namely, the heat generation amount of the 630kVA transformer is 7938W.
Substituting the heat value of the transformer 1 into the formula two can obtain:
Figure BDA0003345108030000053
in combination with the above calculation results, in the present application, two wall-type axial fans 2 with an air volume of 900m3/h may be preferably disposed indoors in the transformer 1, the electrical parameter of the axial fans 2 may be AC24V/50W, and when the indoor temperature exceeds 40 ℃, the two axial fans are started to perform comprehensive air exhaust; when the indoor temperature is reduced to be lower than 40 ℃, the fan stops running.
Through the arrangement, the relation between the heat productivity and the ventilation quantity can be accurately obtained through calculation, so that the indoor temperature of the transformer can be effectively reduced. When the temperature rises, the axial flow fan can be started to continuously radiate heat, and if the temperature meets the standard, the axial flow fan can be closed.
In some preferred embodiments, the method 100 for dissipating heat from a box substation transformer room further comprises: s04, detecting the temperature of the transformer through a temperature sensor; and S05, electrically connecting the temperature sensor with the axial flow fan 2, and controlling the start and stop of any axial flow fan 2 according to the temperature of the transformer 1. Through this setting, in the time of can carrying out the monitoring of transformer 1's indoor temperature, timely dispels the heat to transformer 1's indoor to guarantee being in constant range of indoor temperature. Specifically, when the indoor temperature exceeds 40 ℃, the two axial flow fans are controlled to be started through the temperature sensors to comprehensively exhaust air; when the indoor temperature is reduced to be lower than 40 ℃, the fan stops running.
Fig. 2 and 3 are schematic structural views of a transformer chamber 200 according to an embodiment of the present invention. In the preferred embodiment shown in fig. 2, the transformer chamber 200 may include a natural wind inlet 201, an exhaust outlet 202, and an air duct 203 disposed in the transformer chamber 200, wherein the natural wind inlet 201 is located below the transformer 1 in the transformer chamber 200, the exhaust outlets 202 are uniformly disposed in the transformer chamber 200, the air duct 203 is disposed near the transformer 1, and one end of the air duct is connected to the exhaust outlet 202, and a plurality of air inlets 2031 are formed on the air duct 203. The axial flow fan 2 is disposed at the position of the air outlet 202 for drawing out indoor heat, and the natural air inlet 201 is provided with a louver with a rainproof function.
In this application, because the main source of heat is transformer room 200 in the transformer substation, the produced heat of high-low voltage cabinet is than littleer with transformer room 200, so the inside heat dissipation problem that just can alleviate box-type substation of research transformer room 200. Therefore, the air duct 203 in the application is close to the transformer, so that the cost of the air duct 203 can be saved, the heat dissipation problem of the box-type substation is effectively solved, and the air duct 203 and the axial flow fan 2 are arranged, so that the air duct 203 has the advantages of high thermal response speed, large heat transmission capacity, relatively small fan electric power, relatively low energy consumption and the like. In addition, because the natural air inlet 201 adopts rain-proof tripe, can also improve the sealed effect of transformer room.
In some preferred embodiments, the size of the louver may be 150x150 mm.
In some preferred embodiments, the method 100 for dissipating heat from a transformer room of a box-type substation further comprises powering the axial fan by a wind-solar hybrid power supply system. Specifically, the wind-solar hybrid power supply system can comprise a wind generating set and/or a solar photovoltaic battery pack and/or a storage battery for supplying power to the axial flow fan. Further, the system can also comprise a controller, an inverter, an alternating current and direct current load and the like for realizing the functions of a wind generating set, a solar photovoltaic battery pack, a storage battery series-parallel connection, control and the like, and the system can adopt the prior art and is not described herein again.
In the application, the wind-solar hybrid power supply system supplies power to the axial flow fan, and the system is a composite renewable energy power generation system integrating multiple energy power generation technologies such as wind energy, solar energy and storage battery and a system intelligent control technology. Compared with single wind power generation or photovoltaic power generation, the wind-solar hybrid power supply has the following advantages: by utilizing the complementarity of wind energy and solar energy, stable output can be obtained, and the system has high stability and reliability; under the condition of ensuring the same power supply, the capacity of the energy storage battery can be greatly reduced.
It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.
In the description of the present application, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like, when used in the orientation or positional relationship indicated in the drawings, are used solely for the convenience of describing the present invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered limiting of the present invention.
Furthermore, the appearances of the terms first, second, etc. in this specification are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implying any significant order among or between such features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In this application, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral connections; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims (9)

1. A heat dissipation method for a transformer room of a box-type substation comprises the following steps:
calculating the heat productivity of the transformer according to the power of the indoor transformer;
arranging a plurality of axial flow fans, and calculating ventilation quantity required for eliminating heat in the transformer room when a comprehensive air exhaust mode is adopted;
and according to the indoor temperature standard value, combining the heat productivity and the ventilation quantity to obtain the number of the axial flow fans needing to be started.
2. The method for dissipating heat from a transformer room of a box-type substation according to claim 1, wherein the heat generation amount of the transformer is obtained by the following formula:
Q＝(1-η1)·η2·φ·W；
wherein eta is1Is the efficiency of the transformer, η2Phi is the transformer power factor and W is the transformer power (kVA) for the transformer load factor.
3. The method for dissipating heat from a transformer room of a box-type substation according to claim 2, wherein the transformer efficiency is 0.98; the value range of the transformer load factor is 0.7 to 0.8; the value range of the transformer power factor is 0.9-0.95.
4. The method for dissipating heat from a transformer room of a box substation according to claim 3, wherein the ventilation is obtained by the following formula:
Figure FDA0003345108020000011
wherein L is ventilation air exchange (m)3H); q is the calorific value (W) of the transformer; t is tpDesigning temperature (DEG C) for indoor exhaust; t is tsIs the blast temperature (. degree. C.).
5. The method for dissipating heat from a transformer room of a box-type substation according to claim 4, wherein the axial flow fan is a wall-type axial flow fan having a ventilation volume of 900m3And h, the electrical parameter of the wall type axial flow fan is AC 24V/50W.
6. The method for dissipating heat from a box substation transformer room of claim 5, further comprising:
detecting the temperature of the transformer by a temperature sensor;
and the temperature sensor is electrically connected with the axial flow fan, and the start and stop of any axial flow fan are controlled according to the temperature of the transformer.
7. The method for dissipating heat from a transformer room of a box-type substation according to any one of claims 1 to 6, wherein the transformer room comprises a natural air inlet, an air outlet and an air duct arranged in the transformer room, the natural air inlet is located below a transformer of the transformer room, the air outlet is uniformly arranged in the transformer room, the air duct is arranged close to the transformer, one end of the air duct is connected with the air outlet, a plurality of air inlets are formed in the air duct, wherein the axial flow fan is arranged at the air outlet and used for extracting indoor heat, and a blind window with a rainproof function is arranged on the natural air inlet.
8. The method for dissipating heat from a box substation transformer room according to any one of claims 1 to 6, further comprising powering the axial fan by a wind-solar hybrid power system.
9. The method for dissipating heat from a box-type substation transformer room according to claim 8, wherein the wind-solar hybrid power supply system comprises a wind generating set and/or a solar photovoltaic battery pack and/or a storage battery for supplying power to the axial flow fan.
CN202111320879.4A 2021-11-09 2021-11-09 Heat dissipation method for transformer room of box-type substation Pending CN113889887A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116826577A (en) * 2023-08-29 2023-09-29 川开电气有限公司 Prefabricated cabin ventilation and heat dissipation control method

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CN104376976A (en) * 2014-12-02 2015-02-25 国网上海市电力公司 Ventilation and heat dissipation device of main transformer chamber of transformer substation
CN104409991A (en) * 2014-12-02 2015-03-11 国网上海市电力公司 Transformer substation with ventilating heat dissipation device
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