Intelligent heat dissipation control method for multi-gun high-power direct-current charging pile
阅读说明：本技术 一种多枪大功率直流充电桩智能散热控制方法 (Intelligent heat dissipation control method for multi-gun high-power direct-current charging pile ) 是由 王硕 易杰 张松平 陈凯 杨志兵 李宜龙 于 2019-12-25 设计创作，主要内容包括：本发明公开了多枪大功率直流充电桩智能散热控制方法,步骤为：充电模块分区；所有机柜风机按数量及散热能力分区；得到各充电模块区的总输出功率；确定所有机柜风机区的转速影响因子函数,第i机柜风机区的转速影响因子函数为R<Sub>i</Sub>(P<Sub>i</Sub>,T<Sub>a</Sub>),所有机柜风机区的转速影响因子函数构成R<Sub>PT</Sub>；根据第i机柜风机区中风机额定转速、R<Sub>PT</Sub>和风压影响修正因子A得到第i机柜风机区的第1转速……第Y转速,依次类推得到所有机柜风机区的第1转速到第Y转速；选取各机柜风机区中第1转速到第Y转速中的最大值作为该机柜风机区的最终转速,调整转速完成智能散热控制。本发明的方法,降噪效果好；改造成本低,便于技术推广；针对工况进行控制效果好。(The invention discloses an intelligent heat dissipation control method for a multi-gun high-power direct-current charging pile, which comprises the following steps: partitioning a charging module; all cabinet fans are partitioned according to the number and the heat dissipation capacity; obtaining the total output power of each charging module area; determining the rotating speed influence factor function of all cabinet fan areas, wherein the rotating speed influence factor function of the ith cabinet fan area is R i (P i ,T a ) And the rotating speed influence factor function of all the cabinet fan areas forms R PT (ii) a According to rated rotating speed and R of the fan in the fan area of the ith cabinet PT Obtaining the 1 st rotating speed … … th rotating speed of the ith cabinet fan area according to the wind pressure influence correction factor A, and obtaining the 1 st rotating speed to the Y th rotating speed of all cabinet fan areas by analogy; selecting the maximum value from the 1 st rotating speed to the Y rotating speed in each cabinet fan area as the final rotating speed of the cabinet fan area,and adjusting the rotating speed to finish intelligent heat dissipation control. The method of the invention has good noise reduction effect; the improvement cost is low, and the technical popularization is convenient; the control effect is good aiming at the working condition.)
1. An intelligent heat dissipation control method for a multi-gun high-power direct-current charging pile is characterized in that the multi-gun high-power direct-current charging pile comprises a main control module, a plurality of charging modules, a plurality of charging guns and a plurality of cabinet fans, wherein one charging gun corresponds to more than one charging module and more than one cabinet fan, a sensor for detecting the ambient temperature is arranged on the multi-gun high-power direct-current charging pile and is connected with the main control module, the charging modules are communicated with the main control module in real time, namely, the output voltage and the output current of the charging modules are sent to the main control module in real time, the main control module is used for receiving signals sent by the sensor and the charging modules and processing the signals to obtain a fan control scheme and then controlling the cabinet fans according to the control scheme, the multi-gun high-power direct-current charging pile comprises one or more programs and one or more processors, when the one or more programs are executed by the, causing the main control module to execute a control method as follows;
the control method comprises the following steps:
(1) dividing all charging modules into X charging module areas;
(2) dividing all cabinet fans into Y cabinet fan areas according to the number and the heat dissipation capacity of the cabinet fans, wherein each cabinet fan area at least meets the heat dissipation requirement of one charging module area, and Y is less than or equal to X;
(3) the main control module calculates the output power of each charging module according to the output voltage and the output current of each charging module, and then obtains the total output power of each charging module area;
(4) the main control module determines the rotating speed influence factor functions of all cabinet fan areas, wherein the rotating speed of the ith cabinet fan areaThe influence factor function is Ri(Pi,Ta)，TaIs the ambient temperature in degrees Celsius, PiThe sum of the total output power of each charging module area corresponding to the ith cabinet fan area, wherein i is an integer between 1 and Y;
(5) the main control module forms the rotating speed influence factor functions of all the cabinet fan areas into a 1 multiplied by Y order matrix RPT；
RPT＝[R1(P1,Ta),R2(P2,Ta)……Ri(Pi,Ta)……RY(PY,Ta)]；
(6) The main control module is used for controlling the fan in the fan area of the ith cabinet according to the rated rotating speed F of the fan0、RPTObtaining the 1 st rotating speed F of the ith cabinet fan area together with the wind pressure influence correction factor A1i2 nd rotational speed F2i… … Yth speed FYiAnd analogizing in turn to obtain the 1 st rotating speed to the Y th rotating speed of all the cabinet fan areas, wherein the wind pressure influence correction factor A is a constant matrix, and the calculation formula is as follows:
F1i＝F0·R1(P1,Ta)·A1i；
F2i＝F0·R2(P2,Ta)·A2i；
……
FYi＝F0·RY(PY,Ta)·AYi；
wherein A isjiElements in the jth row and ith column in the A represent a wind pressure influence correction factor of a jth cabinet fan area to an ith cabinet fan area;
(7) and selecting the maximum value from the 1 st rotating speed to the Y rotating speed in each cabinet fan area as the final rotating speed of the cabinet fan area, and adjusting the rotating speed of the fans in each cabinet fan area by the main control module to reach the final rotating speed so as to finish intelligent heat dissipation control.
2. The method for controlling intelligent heat dissipation of a multi-gun high-power direct-current charging pile according to claim 1, wherein the rotating speed influence factor function Ri(Pi,Ta) Is about PiAnd TaIs one of a linear function, a quadratic function, and a piecewise function.
3. The method for controlling intelligent heat dissipation of the multi-gun high-power direct-current charging pile according to claim 2, wherein R isi(Pi,Ta) The expression of (a) is as follows:
wherein a and b are both constants, Ri(Pi,Ta) The value range is 0-1, when Ri(Pi,Ta)＞1，Ri(Pi,Ta)＝1。
4. The method for controlling intelligent heat dissipation of the multi-gun high-power direct-current charging pile according to claim 1, wherein the number of charging modules in each charging module area is the same, and X is equal to the number of charging guns.
5. The intelligent heat dissipation control method for the multi-gun high-power direct-current charging pile according to claim 4, wherein models of all cabinet fans are the same.
6. The intelligent heat dissipation control method for the multi-gun high-power direct-current charging pile according to claim 5, wherein the number of fans in each cabinet fan area is the same, Y is X, and Y cabinet fan areas correspond to X charging module areas one by one.
7. The method for controlling the intelligent heat dissipation of the multi-gun high-power direct-current charging pile according to claim 1, wherein the number of the sensors is two, the sensors are uniformly arranged at an air inlet of the charging pile, and the larger value of the measured values of the two sensors is used as the ambient temperature.
8. The intelligent heat dissipation control method for the multi-gun high-power direct-current charging pile according to claim 6, wherein the wind pressure influence correction factor A is obtained by performing simulation calculation and actual measurement according to the specific structure of the multi-gun high-power direct-current charging pile;
a is a symmetric matrix, the elements on the diagonal are 1, and the elements on both sides of the diagonal are less than 1.
9. The intelligent heat dissipation control method for the multi-gun high-power direct-current charging pile according to claim 8, wherein the 1 st rotating speed to the Y th rotating speed of each cabinet fan area form a Y-order matrix F, and the expression of F is as follows:
10. the method for controlling intelligent heat dissipation of the multi-gun high-power direct-current charging pile according to claim 9, wherein the maximum value from the 1 st rotating speed to the Y th rotating speed in each cabinet fan area is the maximum value of each row of elements in the matrix F.
Technical Field
The invention belongs to the technical field of electronic equipment heat management, and relates to an intelligent heat dissipation control method for a multi-gun high-power direct-current charging pile.
Background
With the increasing severity of environmental problems and the increasing severity of global energy crisis, energy-saving and environment-friendly new energy electric vehicles have gained wide attention and importance in all countries in the world as one of the important ways to solve such problems. As an infrastructure for energy supply of the electric automobile, the charging pile plays a vital role in normal operation and popularization of the electric automobile. According to the development guidelines issued by related national departments, the installation amount of distributed charging piles is more than 480 thousands by 2020, so that the charging requirement of 500 thousands of electric vehicles in the country is met.
In order to shorten the charging time, related manufacturers lay out high-power charging piles at different times. However, implementing a high power dc charge will result in more heat being generated in the charging post, which will increase its temperature dramatically. If the temperature rises too high, fill electric pile and will reduce output to can't realize quick charge. Taking the direct current charging piles with power of 300kW, 360kW and 400kW as examples, the efficiency is generally about 95%, and then 5% of the efficiency is converted into heat loss, and the heat loss is 15kW, 18kW and 20kW respectively. To installing the electric pile of filling in the open air, receive external solar radiation's influence, its inside heat accumulation is more serious. If the heat is not discharged in time, the internal electronic components are burnt and even fire is caused.
In order to guarantee the safe and stable operation of charging pile, avoid the high temperature to cause the damage, must cool off charging pile. At present, a forced air cooling mode is generally adopted for heat dissipation of a high-power direct-current charging pile, but due to the lack of an effective heat dissipation control method, the following problems generally exist in practical application of the charging pile:
1) the noise is high; the cabinet fan works at a rotating speed corresponding to the worst working condition (the highest environmental temperature and the maximum power consumption of the module) for a long time, so that large noise is generated, and since the charging piles are more installed in parking lots near residential areas, if the problem of noise is not solved, complaints of residents nearby are caused, which is not beneficial to popularization of the charging piles;
2) the dust deposition is serious and the energy consumption is high; the cabinet fan runs at full speed for a long time, negative pressure in the cabinet is large, a large amount of dust is easy to enter the dust screen, the dust screen is blocked, the cabinet is over-temperature, and the energy consumption of equipment is increased on the other hand, so that the cabinet fan is not beneficial to energy conservation and environmental protection.
In order to solve the above problems, CN 201710075298.6 discloses an intelligent control fan cooling system and method for charging piles, which determine the actual voltage PWM duty cycle of a cabinet cooling fan according to the maximum temperature values of sensors at the outlets of all modules and the maximum temperature value of an internal heat sink transmitted by a charging module, so as to control the rotation speed of the cooling fan.
In practical application, in order to improve the utilization efficiency of the charging pile power, a plurality of charging guns are generally configured for a high-power charging pile.
Traditional electric pile is filled to two guns, whether single gun or two guns charge and generally all adopt the mode of average power to charge, because single gun charges and can't work according to complete machine maximum output power, this has seriously influenced the speed of charging, and this has still caused the module of charging idle simultaneously, and the power utilization rate that charges is not high.
In order to overcome the defects, a novel double-gun charging pile and a charging pile above are provided in the industry, the charging pile can be charged according to an average power mode, the charging pile with the output power of 300kW is taken as an example, 15kW charging modules are adopted, the number of the modules is 20, 10 charging guns are generally configured, when the charging is carried out according to the average power, the maximum power can be simultaneously charged for 10 electric automobiles, the maximum output power of one gun is 30kW, only 2 charging modules output power exist during the charging of the single gun, the rest 18 modules are in an idle state, when the charging is carried out according to the flexible power distribution mode, the maximum power can be output by the single gun to be 60kW, 4 charging modules output power exist during the charging of the single gun, and 16 modules are still in an idle state.
Obviously, for the electric pile that fills of many guns high-power, no matter whether it possesses the flexible distribution function of power, because there is the upper limit in single rifle output power, when electric automobile etc. inserts the load quantity less, the power utilization ratio that charges is lower, if at this moment according to the heat dissipation control method that single rifle fills electric pile corresponds, will mobilize all fans of entire cabinet and use for the heat dissipation with the same rotational speed work, very be unfavorable for filling electric pile to fall the noise, prevent dust and energy saving and consumption reduction.
Therefore, the development of the charging pile heat dissipation control method capable of adjusting the control scheme in real time according to the load is of great practical significance.
Disclosure of Invention
The invention aims to overcome the defects that the heat dissipation control of a charging pile in the prior art is not intelligent, the charging pile is not suitable for a novel multi-gun high-power charging pile, the noise is high and the energy consumption is high, and provides a heat dissipation control method of the multi-gun high-power charging pile, which can adjust a control scheme in real time according to a load.
In order to achieve the purpose, the invention provides the following technical scheme:
an intelligent heat dissipation control method for a multi-gun high-power direct-current charging pile comprises a main control module, a plurality of charging modules, a plurality of charging guns and a plurality of cabinet fans, wherein one charging gun corresponds to more than one charging module and more than one cabinet fan, a sensor for detecting the ambient temperature is arranged on the multi-gun high-power direct-current charging pile and is connected with the main control module, the charging modules are communicated with the main control module in real time, namely, the output voltage and the output current of the charging modules are sent to the main control module in real time, the main control module is used for receiving signals sent by the sensor and the charging modules, processing the signals to obtain a fan control scheme and then controlling the cabinet fans according to the control scheme, the main control module comprises one or more programs and one or more processors, when the one or more programs are executed by the processors, causing the main control module to execute a control method as follows;
the control method comprises the following steps:
(1) dividing all charging modules into X charging module areas;
(2) dividing all cabinet fans into Y cabinet fan areas according to the number and the heat dissipation capacity of the cabinet fans, wherein each cabinet fan area at least meets the heat dissipation requirement of one charging module area, and Y is less than or equal to X;
(3) the main control module calculates the output power of each charging module according to the output voltage and the output current of each charging module, and then obtains the total output power of each charging module area;
(4) under the condition of neglecting mutual wind pressure interference among the fan areas, the main control module determines the rotating speed influence factor functions of all the cabinet fan areas, wherein the rotating speed influence factor function of the ith cabinet fan area is Ri(Pi,Ta)，TaIs the ambient temperature in degrees Celsius, PiThe sum of the total output power of each charging module area corresponding to the ith cabinet fan area, wherein i is an integer between 1 and Y;
(5) the main control module forms the rotating speed influence factor functions of all the cabinet fan areas into a 1 multiplied by Y order matrix RPT；
RPT＝[R1(P1,Ta),R2(P2,Ta)……Ri(Pi,Ta)……RY(PY,Ta)]；
(6) The main control module is used for controlling the fan in the fan area of the ith cabinet according to the rated rotating speed F of the fan0、RPTObtaining the 1 st rotating speed F of the ith cabinet fan area together with the wind pressure influence correction factor A1i2 nd rotational speed F2i… … Yth speed FYiAnd analogizing in turn to obtain the 1 st rotating speed to the Y th rotating speed of all the cabinet fan areas, wherein the wind pressure influence correction factor A is a constant matrix, and the calculation formula is as follows:
F1i＝F0·R1(P1,Ta)·A1i；
F2i＝F0·R2(P2,Ta)·A2i；
……
FYi＝F0·RY(PY,Ta)·AYi；
wherein A isjiElements in the jth row and ith column in the A represent a wind pressure influence correction factor of a jth cabinet fan area to an ith cabinet fan area;
(7) and selecting the maximum value from the 1 st rotating speed to the Y rotating speed in each cabinet fan area as the final rotating speed of the cabinet fan area, and adjusting the rotating speed of the fans in each cabinet fan area by the main control module to reach the final rotating speed so as to finish intelligent heat dissipation control.
The control method of the invention not only considers the influence of power on the rotating speed of the fan, but also considers the influence among fan areas of the cabinet type air conditioner, adopts A to correct the wind pressure influence, takes the processing process into consideration comprehensively, really constructs the relation function of the rotating speed of the fan and the power, and can realize real-time intelligent adjustment of the rotating speed of the fan according to the power and the environmental temperature through the relation function. The reconstruction cost is low, and the application prospect is good.
As a preferred technical scheme:
multi-gun high-power direct-current charging pile intelligent systemHeat dissipation control method, said rotational speed influence factor function Ri(Pi,Ta) Is about PiAnd TaIs one of a linear function, a quadratic function, and a piecewise function.
The intelligent heat dissipation control method for the multi-gun high-power direct-current charging pile, Ri(Pi,Ta) The expression of (a) is as follows:
wherein a and b are both constants, Ri(Pi,Ta) The value range is 0-1, when Ri(Pi,Ta)＞1，Ri(Pi,Ta) 1. The protection scope of the present invention is not limited thereto, and those skilled in the art can set the function of the rotation speed influencing factor according to the requirement, and the function selected by the present invention is only one feasible technical solution after being verified.
According to the intelligent heat dissipation control method for the multi-gun high-power direct-current charging pile, the number of the charging modules in each charging module area is the same, and X is equal to the number of the charging guns, namely the charging module areas correspond to the charging guns one by one. The scope of the present invention is not limited thereto, but is only exemplary.
According to the intelligent heat dissipation control method for the multi-gun high-power direct current charging pile, all cabinet fans are the same in model. The protection scope of the present invention is not limited thereto, and the cabinet fans are partitioned mainly based on fan power (heat dissipation capacity).
According to the intelligent heat dissipation control method for the multi-gun high-power direct-current charging pile, the number of fans in each cabinet fan area is the same, Y is X, and Y cabinet fan areas correspond to X charging module areas one by one. The protection scope of the present invention is not limited to this, the present invention is exemplified by a simpler arrangement, however, those skilled in the art can make various modifications based on the control method of the present invention, and the present invention is not limited to the above form as long as it is within the protection scope of the present invention based on the control method of the present invention.
According to the intelligent heat dissipation control method for the multi-gun high-power direct-current charging pile, the number of the sensors is two, the sensors are uniformly arranged at the air inlet of the charging pile, and the larger value of the measured values of the two sensors is used as the ambient temperature, so that the problem that the heat dissipation control of the whole machine is influenced when a single temperature sensor breaks down is prevented.
According to the intelligent heat dissipation control method for the multi-gun high-power direct-current charging pile, the wind pressure influence correction factor A is obtained by performing simulation calculation and actual measurement according to the specific structure of the multi-gun high-power direct-current charging pile;
a is a symmetric matrix, the elements on the diagonal are 1, and the elements on both sides of the diagonal are less than 1.
According to the intelligent heat dissipation control method for the multi-gun high-power direct-current charging pile, the 1 st rotating speed to the Y th rotating speed of each cabinet fan area form a Y-order matrix F, and the expression of the F is as follows:
according to the intelligent heat dissipation control method for the multi-gun high-power direct-current charging pile, the maximum value from the 1 st rotating speed to the Y th rotating speed in each cabinet fan area is the maximum value of each row of elements in the matrix F, namely the maximum value of the ith row in the matrix F is selected as the final rotating speed of the ith cabinet fan area to be output and is recorded as FiEach fan area is regulated according to the corresponding output rotating speed;
Fi＝max{F1i,F2i,……,FY-1i,FYi}。
has the advantages that:
(1) according to the intelligent heat dissipation control method for the multi-gun high-power direct-current charging pile, when the charging module of the multi-gun charging pile is idle, the rotating speed of the fan area corresponding to the idle module area can be effectively reduced, and the lower the power utilization rate of the charging module is, the more remarkable the noise and energy consumption reduction of the multi-gun charging pile due to the cabinet fan are;
(2) according to the intelligent heat dissipation control method for the multi-gun high-power direct-current charging pile, parameters such as output voltage, output current and ambient temperature of the charging module are used for heat dissipation control, only an ambient temperature measuring sensor is required to be added on the air inlet side of the module, a large number of temperature sensors are not required to be additionally added at the air outlet of the module, implementation cost is reduced, and technical popularization is facilitated;
(3) the intelligent heat dissipation control method for the multi-gun high-power direct-current charging pile can be used for independently and respectively carrying out heat dissipation control on multiple working conditions such as normal temperature, high temperature, single-module output, multi-module output and the like, can effectively reduce the noise and power consumption of a heat dissipation fan at normal temperature, can ensure high-power output of equipment at high temperature, and has great application prospect.
Drawings
FIG. 1 is a schematic structural diagram of a multi-gun high-power DC charging pile heat dissipation system;
FIG. 2 is a flow chart of the intelligent heat dissipation control method for the multi-gun high-power direct-current charging pile according to the invention;
the charging system comprises an air inlet 1, an air outlet 2, a cabinet 3, a charging module area I, a charging module area II, a charging module area III, a charging module area VI, a charging module area V, a cabinet fan area I, a cabinet fan area II, a cabinet fan area III, a cabinet fan area IV, a cabinet fan area V, a cabinet fan area IV, a cabinet fan area V, a charging module I, a charging module II, a charging module III, a charging module IV, a charging module V, a charging module VI, a charging module VII, a charging module VIII, a charging module XI and a charging module X, wherein the charging module area II, the charging module III, the charging module VI, the cabinet fan area V, the cabinet fan area I, the cabinet.
Detailed Description
The following further describes the embodiments of the present invention with reference to the attached drawings.
The heat dissipation system of the multi-gun high-power direct-current charging pile is shown in figure 1, the airflow direction inside and outside a cabinet is shown in the arrow direction in figure 1, the heat dissipation system comprises a main control module and a cabinet body 3, an air inlet 1 (with a shutter filter screen) is arranged on the right side of the cabinet body 3, two sensors for detecting the ambient temperature are arranged at the air inlet, the sensors are connected with the main control module, an air outlet 2 (with the shutter filter screen) is arranged on the left side of the cabinet body 3, 5 cabinet fans with the same model are arranged at the air outlet 2, the charging pile is provided with 5 charging guns (not shown in figure 1), 10 charging modules (namely a charging module I31, a charging module II32, a charging module III 33, a charging module IV 34, a charging module V35, a charging module VI 36, a charging module VII 37, a charging module VIII 38, a charging module XI and a charging module X40 in figure, the maximum output power of a single charging module is 15kW, the charging module and the main control module communicate in real time, namely, the output voltage and the output current of the charging module are transmitted to the main control module in real time, the main control module is used for receiving signals sent by the sensors and the charging modules and processing the signals to obtain a fan control scheme and then controlling the cabinet fan according to the control scheme, the main control module comprises one or more programs and one or more processors, and when the one or more programs are executed by the processors, the main control module executes the intelligent heat dissipation control method for the multi-gun high-power direct-current charging pile:
(1) dividing all charging modules into 5 charging module areas, specifically, a charging module I31 and a charging module II32 are a charging module area I11, a charging module III 33 and a charging module IV 34 are a charging module area II 12, a charging module V35 and a charging module VI 36 are a charging module area III 13, a charging module VII 37 and a charging module VIII 38 are a charging module area VI 14, and a charging module XI 39 and a charging module X40 are charging module areas V15;
(2) dividing all 5 cabinet fans into 5 cabinet fan areas (namely a cabinet fan area I21, a cabinet fan area II21, a cabinet fan area III 23, a cabinet fan area IV 24 and a cabinet fan area V25), wherein five cabinet fan areas correspond to five charging module areas one by one;
(3) the main control module calculates the output power of each charging module according to the output voltage and the output current of each charging module, and then obtains the total output power of each charging module area, which specifically comprises the following steps:
main control equipment collects output voltage V of charging modules 31-4031～V40Output current I31～I40Based on the total output power P of each charging module region1、P2、P3、P4And P5：
P1＝I31V31+I32V32，
P2＝I33V33+I34V34，
P3＝I35V35+I36V36，
P4＝I37V37+I38V38，
P5＝I39V39+I40V40；
(4) The main control module determines the rotating speed influence factor functions of all cabinet fan areas, wherein the rotating speed influence factor function of the ith cabinet fan area is Ri(Pi,Ta) Wherein R isi(Pi,Ta) The expression of (a) is as follows:
wherein a and b are both constants, TaIs the ambient temperature, wherein the greater of the two sensor measurements is taken as the ambient temperature in degrees C.iIs the sum of the total output power of each charging module zone corresponding to the ith cabinet fan zone, i is an integer between 1 and 5, Ri(Pi,Ta) The value range is 0-1, when Ri(Pi,Ta)＞1，Ri(Pi,Ta)＝1；
(5) The main control module forms the rotating speed influence factor functions of all the cabinet fan areas into a 1 multiplied by 5 order matrix RPT；
RPT＝[R1(P1,Ta),R2(P2,Ta)……Ri(Pi,Ta)……R5(P5,Ta)]；
(6) The main control module is used for controlling the fan in the fan area of the ith cabinet according to the rated rotating speed F of the fan0、RPTObtaining the 1 st rotating speed F of the ith cabinet fan area together with the wind pressure influence correction factor A1i2 nd rotational speed F2i… … th 5Rotational speed F5iAnd analogizing in turn to obtain the 1 st rotating speed to the 5 th rotating speed of all cabinet fan areas, wherein the wind pressure influence correction factor A is a constant matrix, and is obtained after simulation calculation and actual measurement are carried out according to the specific structure of the multi-gun high-power direct-current charging pile, and the calculation formula is as follows:
F1i＝F0·R1(P1,Ta)·A1i；
F2i＝F0·R2(P2,Ta)·A2i；
……
F5i＝F0·R5(P5,Ta)·A5i；
Wherein A isjiElements in the jth row and ith column in the A represent a wind pressure influence correction factor of a jth cabinet fan area to an ith cabinet fan area;
the 1 st rotating speed to the 5 th rotating speed of each cabinet fan area form a 5-order matrix F, and the expression of the F is as follows:
(7) and selecting the maximum value from the 1 st rotating speed to the Y th rotating speed in each cabinet fan area as the final rotating speed of the cabinet fan area (the maximum value from the 1 st rotating speed to the Y th rotating speed in each cabinet fan area is the maximum value of each row of elements in the matrix F), and adjusting the rotating speed of the fan in each cabinet fan area by the main control module to reach the final rotating speed so as to finish intelligent heat dissipation control.
The following further describes the effects of the embodiments of the present invention with reference to specific scenarios.
And in the first scene, 1 electric automobile is charged, the corresponding full power of a single gun is output by 60kW, and at the moment, the charging module area I11 and the charging module area II 12 are simultaneously output according to 30kW of the maximum power. Under the conditions that the environmental temperatures are respectively 25 ℃ and 50 ℃, the ratio of the rotating speed of each fan area to the rated rotating speed is calculated and obtained, and is shown in tables 1 and 2. Obviously, compared with the intelligent heat dissipation control method for the single-gun charging pile, on the premise that the output power and heat dissipation of the module are not affected, the rotating speeds of the cabinet fan area III 23, the cabinet fan area IV 24 and the cabinet fan area V25 are all reduced by at least 50%.
TABLE 1 Single gun full power output, time cabinet fan speed at 25 ℃ ambient temperature
i
1
2
3
4
5
Pi(kW)
30
30
0
0
0
Ri(Pi,25℃)
0.5
0.5
0
0
0
Fi/F0
0.5
0.5
0.25
0.2
0.2
TABLE 2 Single gun full power output, 50 ℃ ambient time cabinet fan speed
i
1
2
3
4
5
Pi(kW)
30
30
0
0
0
Ri(Pi,25℃)
1
1
0.5
0.5
0.5
Fi/F0
1
1
0.5
0.5
0.5
And in a second scene, 2 electric automobiles are charged simultaneously, and double guns output full power simultaneously, namely the charging module areas I-IV 11-14 output at the same time according to the maximum power of 30 kW. Under the conditions that the environmental temperatures are respectively 25 ℃ and 50 ℃, the ratio of the rotating speed of each fan area to the rated rotating speed is calculated and obtained, and is shown in tables 3 and 4. Obviously, compared with the intelligent heat dissipation control method for the single-gun charging pile, the rotating speed of the cabinet fan area V25 is reduced by 50% on the premise that the output power and the heat dissipation of the module are not affected.
TABLE 3 blower speed of cabinet at ambient temperature 25 ℃ with full power output of double guns
i
1
2
3
4
5
Pi(kW)
30
30
30
30
0
Ri(Pi,25℃)
0.5
0.5
0.5
0.5
0
Fi/F0
0.5
0.5
0.5
0.5
0.25
TABLE 4 double-gun full power output, cabinet fan speed at 50 ℃ ambient temperature
i
1
2
3
4
5
Pi(kW)
30
30
30
30
0
Ri(Pi,25℃)
1
1
1
1
0.5
Fi/F0
1
1
1
1
0.5
Through verification, the intelligent heat dissipation control method for the multi-gun high-power direct-current charging pile can effectively reduce the rotating speed of a fan area corresponding to an idle module area when the charging module of the multi-gun charging pile is idle, and the lower the power utilization rate of the charging module is, the more remarkable the noise and energy consumption reduction of the multi-gun charging pile due to a cabinet fan are; parameters such as output voltage, output current and ambient temperature of the charging module are used for heat dissipation control, only an ambient temperature measuring sensor is needed to be added on the air inlet side of the module, and a large number of temperature sensors are not needed to be additionally added at the air outlet of the module, so that the implementation cost is reduced, and the technical popularization is facilitated; the heat dissipation control device can be used for independently and respectively carrying out heat dissipation control on various working conditions such as normal temperature, high temperature, single-module output, multi-module output and the like, so that the noise and the power consumption of the heat dissipation fan at the normal temperature can be effectively reduced, the high-power output of equipment at the high temperature can be ensured, and the heat dissipation control device has a wide application prospect.
Although specific embodiments of the present invention have been described above, it will be appreciated by those skilled in the art that these embodiments are merely illustrative and various changes or modifications may be made without departing from the principles and spirit of the invention.
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