CN112416039A - Dehumidification method of power transformation cabinet - Google Patents

Dehumidification method of power transformation cabinet Download PDF

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Publication number
CN112416039A
CN112416039A CN202110020893.6A CN202110020893A CN112416039A CN 112416039 A CN112416039 A CN 112416039A CN 202110020893 A CN202110020893 A CN 202110020893A CN 112416039 A CN112416039 A CN 112416039A
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CN
China
Prior art keywords
power transformation
transformation cabinet
humidity
fan
temperature
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202110020893.6A
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Chinese (zh)
Inventor
周玥玥
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shandong Baiyuan Technology Co Ltd
Original Assignee
Shandong Baiyuan Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shandong Baiyuan Technology Co Ltd filed Critical Shandong Baiyuan Technology Co Ltd
Priority to CN202110020893.6A priority Critical patent/CN112416039A/en
Publication of CN112416039A publication Critical patent/CN112416039A/en
Pending legal-status Critical Current

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Classifications

    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05DSYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D27/00Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00
    • G05D27/02Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00 characterised by the use of electric means
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02BBOARDS, SUBSTATIONS, OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B1/00Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
    • H02B1/26Casings; Parts thereof or accessories therefor
    • H02B1/28Casings; Parts thereof or accessories therefor dustproof, splashproof, drip-proof, waterproof or flameproof
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02BBOARDS, SUBSTATIONS, OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B1/00Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
    • H02B1/56Cooling; Ventilation
    • H02B1/565Cooling; Ventilation for cabinets

Abstract

The invention relates to the technical field of power transformation, and discloses a dehumidification method of a power transformation cabinet.

Description

Dehumidification method of power transformation cabinet
Technical Field
The invention relates to the technical field of power transformation, in particular to a dehumidification method of a power transformation cabinet.
Background
At present, a transformer cabinet is taken as a cabinet type transformer substation, so that the transformer cabinet is gradually valued by people due to low cost and convenient maintenance, the application range is wider and wider, and the transformer cabinet gradually replaces the transformer substations of all cities and countryside.
The power transformation cabinet is power equipment which is generally used in a power system for ensuring the quality of electric energy and the safety of the equipment, ensures the constant temperature and humidity in a power distribution cabinet or a power transformation cabinet in the power system, and is very important for the whole power supply system. In practical application, the long-term use and the environmental influence can be damped easily, so that the service life and the use of the power transformation cabinet are influenced, the power consumption of the existing power transformation cabinet dehumidifier is large, the service life of equipment is short, and therefore the durable frequency conversion dehumidification power transformation cabinet with the reduced dehumidification process energy consumption is required to be provided.
Disclosure of Invention
The invention provides a dehumidification method of a power transformation cabinet to solve the problems, which can reduce the energy consumption in the dehumidification process and improve the dehumidification effect, the soft start function of a frequency converter enables the start current to change from zero, the maximum value does not exceed the rated current, the impact on a power grid and the requirement on the power supply capacity are reduced, the service life of equipment is prolonged, and the maintenance cost of the equipment is saved.
According to a first aspect of the invention, a dehumidification method of a power transformation cabinet is provided, the power transformation cabinet comprises a temperature and humidity sensor, a processor, a frequency converter, a fan, a heater, a display and a wireless transmission device, the temperature and humidity sensor, the frequency converter, the fan, the heater, the display and the wireless transmission device are all connected with the processor, the ambient humidity in the power transformation cabinet is obtained through the temperature and humidity sensor, the processor judges whether the ambient humidity in the power transformation cabinet is greater than a preset first humidity threshold value, if yes, a dehumidification mode is started, the ambient humidity in the power transformation cabinet is detected after the dehumidification mode is started, and the dehumidification mode is suspended when the ambient humidity is judged to be less than a preset second humidity threshold value; wherein, the dehumidification mode is realized by the processor adjusting the working states of the fan and the heater according to the environment humidity, and the specific adjusting steps are as follows: acquiring and storing an environmental humidity value S1 in the power transformation cabinet every other preset period, and calculating a difference S (k) between the environmental humidity value S1 and a set environmental humidity value S; taking the difference S (k) as a variable into a PID algorithm to obtain a fan rotating speed V (k) corresponding to the fan frequency F of the current preset period so as to control the fan to operate; the PID algorithm is specifically as follows:wherein V (k) is the fan rotation speed, Kp is the fan proportional gain, Tk is the fan integral time constant, and Td is the fan differential time constant; the method also comprises the step of controlling the heating state of the heater, and specifically comprises the following steps: starting a fan, and taking the humidity value and the temperature value of the environment in the power transformation cabinet after dehumidification as the valuesThe temperature control module starts a closed-loop regulating program and transmits a processed signal to the frequency converter, and the frequency converter outputs corresponding frequency to change the power of the heater, wherein the temperature control module is used for controlling the environmental humidity and the temperature in the power transformation cabinet within a preset range; the closed-loop regulating program and the PID algorithm of the temperature control module are realized in the processor; the wireless transmission equipment is used for sending the environment temperature and humidity in the power transformation cabinet to a mobile phone of a remote monitoring user, the monitoring user sends a temperature and humidity control command to a processor of the power transformation cabinet through the mobile phone according to specific requirements, the processor preferentially processes the obtained control command of the monitoring user, specifically, the control command which is originally executed by the processor is stopped being executed when the control command of the monitoring user is obtained, and the fan, the heater and the frequency converter are correspondingly operated according to the control command of the monitoring user; the display is used for displaying the acquired environmental temperature and humidity information in the power transformation cabinet in real time.
Preferably, the number of the fans is more than two, and the number of the heaters is more than two.
Preferably, the power transformation cabinet further comprises an alarm device connected with the processor, the alarm device detects abnormal conditions in the power transformation cabinet, the abnormal conditions are displayed on the display, and the wireless transmission equipment sends the abnormal conditions to the mobile phone of the monitoring user.
According to the invention, through the dehumidification technology applied to the power transformation cabinet, the energy consumption of the traditional power transformation cabinet in the dehumidification process is reduced, and the control precision and the anti-interference capability are improved by adopting closed-loop control. The invention can acquire the abnormal condition of the power transformation cabinet in time and avoid loss. The invention can realize remote control according to the requirements of the monitoring user, and improves the user experience and the intelligent degree of the system.
Drawings
The invention is further described below with reference to the figures and examples.
Fig. 1 is a schematic structural diagram of a system adopting a dehumidification method of a power transformation cabinet according to the present invention.
FIG. 2 is a schematic control flow diagram of the temperature control module when not started according to the present invention.
FIG. 3 is a schematic diagram of a control flow of the temperature control module when the temperature control module is started.
Detailed Description
Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.
In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
A dehumidification method of a power transformation cabinet comprises a temperature and humidity sensor, a processor, a frequency converter, a fan, a heater, a display and wireless transmission equipment. The temperature and humidity sensor, the frequency converter, the fan, the heater, the display and the wireless transmission device are all connected with the processor, specifically referring to the attached drawing of fig. 1, the temperature and humidity sensor is used for acquiring the environmental humidity in the power transformation cabinet, the processor is used for judging whether the environmental humidity in the power transformation cabinet is greater than a preset first humidity threshold value or not, if yes, the dehumidification mode is started, the environmental humidity in the power transformation cabinet is detected after the dehumidification mode is started, and when the environmental humidity is judged to be less than a preset second humidity threshold value, the dehumidification mode is suspended; the dehumidification mode is realized by the processor adjusting the working states of the fan and the heater according to the environment humidity, and the specific adjusting steps are as follows: acquiring and storing an environmental humidity value S1 in the power transformation cabinet every other preset period, and calculating a difference S (k) between the environmental humidity value S1 and a set environmental humidity value S; taking the difference value S (k) as a variable into a PID algorithm to obtain the current preset periodControlling the fan to operate according to the fan rotating speed V (k) corresponding to the fan frequency F; the PID algorithm is specifically as follows:wherein V (k) is the fan rotation speed, Kp is the fan proportional gain, Tk is the fan integral time constant, and Td is the fan differential time constant; the method also comprises the step of controlling the heating state of the heater, and specifically comprises the following steps: the temperature control module starts a closed loop adjusting program and sends a processed signal to the frequency converter, the frequency converter outputs corresponding frequency to change the power of the heater, and the temperature control module is used for controlling the ambient humidity and the temperature in the power transformation cabinet within a preset range.
Preferably, the preset period is any value in the range of 1s-10 s.
Preferably, the system further comprises a frequency converter of the fan, and the control of the fan is realized by controlling the frequency converter of the fan through the processor after the control frequency of the fan is obtained through the relation between the fan rotating speed and the fan frequency calculated through the PID algorithm.
The system control flow diagram refers to fig. 2 and 3 of the accompanying drawings. The fan PID control in the attached drawing realizes the control of the fan through the PID algorithm. The temperature control module controls the heater based on the ambient temperature after the fan is controlled by the fan PID and the ambient humidity when the heater is not started, wherein fig. 2 is a schematic control flow diagram when the ambient humidity value in the power transformation cabinet after the fan is started and dehumidified is less than or equal to a preset third humidity threshold value and the temperature control module is not in operation. Fig. 3 is a schematic control flow diagram of the temperature control module when the temperature control module works and the ambient humidity value in the power transformation cabinet after the fan starts to dehumidify is greater than a preset third humidity threshold value. The preset third humidity threshold is larger than the preset first humidity threshold and smaller than the preset second humidity threshold.
The specific implementation manner of the temperature control module can be as follows: the temperature control module controls a frequency converter of the heater to realize the control of the heater when the environmental humidity value in the power transformation cabinet after the fan starts to dehumidify is larger than a preset third humidity threshold value and the environmental temperature in the power transformation cabinet is within a normal working temperature range of the power transformation cabinet, specifically, the heating is carried out by first preset heating power, the environmental humidity in the power transformation cabinet is still larger than the first preset humidity threshold value when the heating time reaches the first heating time threshold value, the heating is carried out by increasing second preset heating power on the basis of the first preset heating power, if the environmental humidity in the power transformation cabinet is still larger than the first preset humidity threshold value when the heating time reaches the first heating time threshold value, the heating is carried out by increasing second preset heating power on the basis of the first preset heating power, the heating is carried out in sequence, and the heating is carried out until the environmental humidity in the power transformation cabinet is smaller than or equal to the preset third humidity threshold value or the temperature in the power transformation cabinet is larger than or equal to, the first temperature threshold value is within the normal working temperature range of the power transformation cabinet and close to the maximum value of the normal working temperature of the power transformation cabinet.
The implementation mode of the temperature control module simplifies the complexity of programs, reduces the burden of a processor, controls the humidity of the power transformation cabinet together by combining with the PID control of the fan, improves the dehumidification efficiency, reduces the overall power of the system by the access of the frequency conversion technology, and optimizes the overall effect of the dehumidification system.
The specific implementation manner of the temperature control module can also be as follows: after the fan starts dehumidification, the ambient humidity value in the power transformation cabinet is greater than a preset third humidity threshold value, and the ambient temperature in the power transformation cabinet is within a normal working temperature range of the power transformation cabinet, the temperature control module controls the frequency converter of the heater to realize control over the heater, and specifically, based on a difference value S (k) between the ambient humidity value S1 in the power transformation cabinet and a set ambient humidity set value S, the heater heating power of the current preset period is obtained through a PID (proportion integration differentiation) or PI (proportional integral) algorithm to control the heater to operate; the specific algorithm implementation mode can adopt a similar fan control mode and a PID or PI algorithm in the prior art, and is not described herein again.
The temperature control module of the invention adopts PID or PI algorithm to control the heater, thus improving the dehumidification precision of the dehumidification system, and the double control of the heater and the fan also improves the whole dehumidification effect of the system. Meanwhile, the power of the dehumidification system is reduced due to the introduction of a frequency conversion technology, and the working performance of the system is optimized.
The closed-loop regulating program and the algorithm of the temperature control module are realized in the processor; the wireless transmission equipment is used for sending the environment temperature and humidity in the power transformation cabinet to a mobile phone of a remote monitoring user, the monitoring user sends a temperature and humidity control command to a processor of the power transformation cabinet through the mobile phone according to specific requirements, the processor preferentially obtains the control command of the monitoring user, specifically, the processor stops executing an internal instruction of the processor when the control command of the monitoring user is obtained, and correspondingly operates the fan, the heater and the frequency converter according to the control command of the monitoring user; the display is used for displaying the acquired environmental temperature and humidity information in the power transformation cabinet in real time. The connection mode of the mobile phone and the transformer cabinet refers to the attached figure 1.
Preferably, the number of the fans is more than two, and the number of the heaters is more than two.
Preferably, the power transformation cabinet further comprises an alarm device connected with the processor, the alarm device detects abnormal conditions in the power transformation cabinet, the abnormal conditions are displayed on the display, and the wireless transmission equipment sends the abnormal conditions to the mobile phone of the monitoring user. The monitoring user can timely acquire the state in the power transformation cabinet, timely make adjustment and reduce the work risk of the power transformation cabinet.
According to the scheme, the dehumidification of the power transformation cabinet is more intelligent, the user interaction performance is improved, the dehumidification efficiency is improved, the risk of abnormal work of the power transformation cabinet due to humidity or temperature is reduced, and the service life of the power transformation cabinet is prolonged.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims (3)

1. A dehumidification method of a power transformation cabinet is characterized by comprising the following steps: the transformation cabinet comprises a temperature and humidity sensor, a processor, a frequency converter, a fan, a heater, a display and a wireless transmission deviceThe temperature and humidity sensor, the frequency converter, the fan, the heater, the display and the wireless transmission equipment are all connected with the processor, the environmental humidity in the power transformation cabinet is obtained through the temperature and humidity sensor, the processor judges whether the environmental humidity in the environment of the power transformation cabinet is larger than a preset first humidity threshold value or not, if yes, a dehumidification mode is started, the environmental humidity in the power transformation cabinet is detected after the dehumidification mode is started, and the dehumidification mode is suspended when the environmental humidity is judged to be smaller than a preset second humidity threshold value; wherein, the dehumidification mode is realized by the processor adjusting the working states of the fan and the heater according to the environment humidity, and the specific adjusting steps are as follows: acquiring and storing an environmental humidity value S1 in the power transformation cabinet every other preset period, and calculating a difference S (k) between the environmental humidity value S1 and a set environmental humidity value S; taking the difference S (k) as a variable into a PID algorithm to obtain a fan rotating speed V (k) corresponding to the fan frequency F of the current preset period so as to control the fan to operate; the PID algorithm is specifically as follows:wherein V (k) is the fan rotation speed, Kp is the fan proportional gain, Tk is the fan integral time constant, and Td is the fan differential time constant; the method also comprises the step of controlling the heating state of the heater, and specifically comprises the following steps: the temperature control module starts a closed-loop adjusting program and transmits a processed signal to the frequency converter, and the frequency converter outputs corresponding frequency to change the power of the heater, wherein the temperature control module is used for controlling the ambient humidity and the temperature in the power transformation cabinet within a preset range; the closed-loop regulating program and the PID algorithm of the temperature control module are realized in the processor; the wireless transmission equipment is used for transmitting the environment temperature and humidity in the power transformation cabinet to a mobile phone of a remote monitoring user, the monitoring user transmits a temperature and humidity control command to a processor of the power transformation cabinet through the mobile phone according to specific requirements, and the processor preferentially processes the obtained control command of the monitoring user, specifically, stops executing a control instruction which is originally executed by the processor when the control command of the monitoring user is obtainedCorrespondingly operating the fan, the heater and the frequency converter according to the control command of the monitoring user; the display is used for displaying the acquired environmental temperature and humidity information in the power transformation cabinet in real time.
2. A dehumidification method of a power transformation cabinet according to claim 1, characterized in that: the number of the fans is more than two, and the number of the heaters is more than two.
3. A dehumidification method of a power transformation cabinet according to claim 1 or 2, characterized in that: the power transformation cabinet further comprises an alarm device connected with the processor, the alarm device detects abnormal conditions in the power transformation cabinet, the abnormal conditions are displayed on the display, and the wireless transmission equipment sends the abnormal conditions to a mobile phone of the monitoring user.
CN202110020893.6A 2021-01-20 2021-01-20 Dehumidification method of power transformation cabinet Pending CN112416039A (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113625797A (en) * 2021-08-13 2021-11-09 国网河北省电力有限公司检修分公司 Automatic warning device for water inlet or damp of terminal box of transformer substation

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US20100001084A1 (en) * 2007-07-05 2010-01-07 Andrei Tres Air Conditioning Equipment
CN103993465A (en) * 2014-04-09 2014-08-20 安徽华盛科技控股股份有限公司 CIT active type clothes drying cabinet
CN104111680A (en) * 2014-07-31 2014-10-22 国家电网公司 All-digital intelligent temperature and humidity control dehumidification system
CN107102659A (en) * 2017-05-16 2017-08-29 沈阳工业大学 It is a kind of can remote monitoring electric distribution cabinet dehumidification system and its control method
CN111059711A (en) * 2019-12-31 2020-04-24 Tcl空调器(中山)有限公司 Constant-temperature dehumidification method, device and equipment for air conditioner and readable storage medium
CN112128953A (en) * 2020-09-10 2020-12-25 青岛海尔空调器有限总公司 Method and device for controlling humidity of air conditioner and air conditioner

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100001084A1 (en) * 2007-07-05 2010-01-07 Andrei Tres Air Conditioning Equipment
CN101329136A (en) * 2008-07-22 2008-12-24 广东工业大学 Paper pulp molding drying line based on variable-frequency control technique and preparing process thereof
CN103993465A (en) * 2014-04-09 2014-08-20 安徽华盛科技控股股份有限公司 CIT active type clothes drying cabinet
CN104111680A (en) * 2014-07-31 2014-10-22 国家电网公司 All-digital intelligent temperature and humidity control dehumidification system
CN107102659A (en) * 2017-05-16 2017-08-29 沈阳工业大学 It is a kind of can remote monitoring electric distribution cabinet dehumidification system and its control method
CN111059711A (en) * 2019-12-31 2020-04-24 Tcl空调器(中山)有限公司 Constant-temperature dehumidification method, device and equipment for air conditioner and readable storage medium
CN112128953A (en) * 2020-09-10 2020-12-25 青岛海尔空调器有限总公司 Method and device for controlling humidity of air conditioner and air conditioner

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113625797A (en) * 2021-08-13 2021-11-09 国网河北省电力有限公司检修分公司 Automatic warning device for water inlet or damp of terminal box of transformer substation

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