CN115655517A - Abnormal heat dissipation early warning system of urban rail braking energy feedback device - Google Patents
Abnormal heat dissipation early warning system of urban rail braking energy feedback device Download PDFInfo
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Abstract
The invention provides a heat dissipation abnormity early warning system of an urban rail brake energy feedback device, and relates to the technical field of heat dissipation abnormity early warning of the brake energy feedback device.
Description
Technical Field
The invention relates to the technical field of abnormal heat dissipation of a braking energy feeder, in particular to an early warning system for abnormal heat dissipation of an urban rail braking energy feeder.
Background
In increasingly busy urban traffic, urban rails gradually become the primary solution for solving traffic congestion by virtue of the advantages of large passenger capacity, high efficiency, green energy conservation and the like. In urban rail operation, in order to keep the characteristics of high speed, high efficiency and the like of an urban rail train, frequent acceleration and deceleration between short-distance urban rail stations are needed, wherein a lot of energy can be generated in deceleration braking, and the braking energy feedback device can recycle the energy, so that the urban rail train is a powerful assistant for building green and energy-saving urban rails.
The braking energy feedback device is a device which can absorb and invert the energy into alternating current with the same frequency and phase as the voltage of the power grid to be sent back to the power grid when the urban rail vehicle is subjected to regenerative electric braking and the braking energy cannot be consumed by other vehicles or equipment, so that the device can process the regenerative energy and stabilize the voltage of the direct current traction power grid. The core of the braking energy feedback device is a high-power switching device IGBT. Because of the operating characteristics of the IGBT, the IGBT can generate great heat, and the heat collection in a short time can cause a great deal of damage to the IGBT and even cause device explosion, so that the heat dissipation is a very important research point in the research of energy feedback devices.
The existing IGBT mainstream heat dissipation method mainly comprises the steps that an IGBT is installed on a heat dissipation substrate, and then a fan is used for cooling and heat dissipation, for example, a heat dissipation system is provided for a subway braking energy feeder power module in the prior art, the heat dissipation system comprises an IGBT power module, an NTC thermistor for measuring the temperature of the IGBT power module, an air speed measuring device installed in a heat dissipation air duct of the IGBT power module, a heat dissipation fan installed in the heat dissipation air duct, and a current measuring device for measuring the current of a fan circuit installed in a heat dissipation fan circuit. The work cycle of the energy feeding device is directly related to the operation of vehicles on a line, the energy feeding device generally brakes before an urban rail vehicle enters a station, namely, the energy feeding device can start to work when the voltage of a contact network rises to a certain threshold value, and the energy feeding device stops working after the voltage of the contact network drops, so that the energy feeding device is intermittent and periodic. This condition can cause the IGBT to reach megawatt levels of power in a short period of time, in other words, the temperature of the IGBT can rise rapidly in a very short period of time. Just because be intermittent type formula work system, consider to present the green energy-conserving design starting point of device, radiator fan often can set up to just can high-power operation when IGBT work, and the staff has the control blind area to the change of heat dissipation operating mode temperature information, if it is the heat dissipation unusual, then probably causes the risk of IGBT power module explosion, is unfavorable for the safety and the stability of security equipment.
Meanwhile, as PM10 dust and the like often exist in the substation, a dust screen is installed at an air inlet of the fan air duct to prevent the dust from entering the equipment. It can be said that the device cooling system can be presented the good or bad direct relation to the operating mode of IGBT module, consequently, the risk of exploding the machine can be reduced effectively to the control analysis of heat dissipation operating mode.
Disclosure of Invention
In order to solve the problem that a real-time online monitoring and analyzing means is lacked in the current heat dissipation working condition of the energy feedback device, the invention provides a heat dissipation abnormity early warning system of the urban rail braking energy feedback device, which analyzes possible abnormity in heat dissipation of the urban rail braking energy feedback device according to temperature information, reminds operation and maintenance personnel to check and replace equipment in time, avoids the risk of explosion of an IGBT power module of the braking energy feedback device caused by abnormal heat dissipation, and ensures the safety and stability of equipment operation.
In order to achieve the technical effects, the technical scheme of the invention is as follows:
the utility model provides an unusual early warning system of city rail braking energy feedback device heat dissipation, includes: the system comprises an air inlet measuring and processing unit, a fan measuring and processing unit, a temperature measuring and processing unit arranged on a radiating substrate of a braking energy feedback device, an air outlet measuring and processing unit, a data collecting unit and an early warning display platform;
the air inlet measuring and processing unit is used for measuring and processing the temperature at the air inlet and the air speed at the air inlet; the fan measurement processing unit is used for measuring and processing the current in the fan circuit and the rotating speed of blades on the fan; the temperature measurement processing unit is used for measuring and processing the temperature of the brake energy feedback device heat dissipation substrate; the air outlet measurement processing unit is used for measuring and processing the temperature at the air outlet and the air speed at the air outlet; the data collecting unit collects the temperature at the air inlet, the air speed at the air inlet, the current in a fan circuit, the rotating speed of blades on the fan, the temperature of the brake energy feedback device radiating substrate, the temperature at the air outlet and the air speed data information at the air outlet, and transmits the collected information to the early warning display platform, and the early warning display platform analyzes the abnormal heat dissipation condition of the urban rail brake energy feedback device according to the received information and performs early warning display on the abnormal heat dissipation condition.
The technical scheme aims at the braking energy feedback device provided with the fan and the radiating substrate, the temperature of the air inlet where the braking energy feedback device is located, the air speed of the air inlet, the current in a fan circuit, the blade rotating speed on the fan, the temperature of the radiating substrate of the braking energy feedback device, the temperature of the air outlet and the air speed data of the air outlet can be monitored and collected on line in real time, all-around monitoring analysis is carried out from the angles of the air inlet, the air channel, the fan, the radiating substrate and the air outlet, the collected data are transmitted to the early warning display platform, the early warning display platform is used for analyzing the abnormal radiating condition of the urban rail braking energy feedback device, the abnormal radiating condition is early warned and displayed, the early warning comprises the abnormal ambient temperature of the air inlet, the early warning of the blockage of a filter screen, the abnormal aging early warning of the radiating fan, the abnormal early warning of the air outlet, the early warning of the radiating substrate and the abnormal temperature rise of the braking energy feedback device, so that operation and maintenance personnel can master the radiating condition of the braking energy feedback device in real time due to heat dissipation, and ensure the safety and stability of equipment operation when the braking energy feedback device works. The operation and maintenance management efficiency is improved.
Preferably, the system further comprises a communication unit, and the communication unit receives the temperature at the air inlet, the air speed at the air inlet, the current in the fan circuit, the rotating speed of the blades on the fan, the temperature of the brake energy feedback device heat dissipation substrate, the temperature at the air outlet and the air speed information data at the air outlet, which are transmitted by the data collecting unit, and then transmits the information to the early warning display platform.
Preferably, the early warning display platform is provided with an analysis processing server and a display unit, the analysis processing server analyzes and processes the received temperature at the air inlet, the wind speed at the air inlet, the current in the fan circuit, the rotating speed of the blades on the fan, the temperature of the brake energy feedback device heat dissipation substrate, the temperature at the air outlet and the wind speed data information at the air outlet to obtain the abnormal heat dissipation condition of the urban rail brake energy feedback device, and the early warning is performed on the abnormal heat dissipation condition and is transmitted to the display unit.
Preferably, the intake measurement processing unit includes:
the first temperature measurement processing device is arranged at the air inlet, measures and obtains currents at different temperatures at the air inlet, and processes the currents into corresponding air inlet temperature data;
and the first wind speed measurement processing device is arranged at the air inlet, measures the wind pressure at the air inlet and processes the wind pressure into corresponding wind speed data of the air inlet.
The first temperature measurement processing device substantially comprises a temperature measurement device and a temperature processing device, the temperature measurement device and the temperature processing device are used in a matched mode, when the temperature measurement device measures the temperature, currents at different temperatures of the air inlet are obtained, and then the currents are converted into corresponding air inlet temperature data through the temperature processing device; the first wind speed measuring and processing device substantially comprises a wind speed measuring device and a wind speed processing device, the wind speed measuring device is matched with the wind speed processing device for use, when the wind speed measuring device measures the temperature, the wind pressure at the air inlet is obtained, and the wind speed processing device processes the wind pressure into corresponding wind speed data of the air inlet.
Preferably, the fan measurement processing unit includes:
the current measuring device is used for measuring current data in a fan circuit of a fan arranged at the air inlet;
and the blade rotating speed measuring device is used for measuring blade rotating speed data of the fan arranged at the air inlet.
Preferably, N substations are equipped with braking energy feedback devices in the urban rail line, and the analysis processing server of the early warning display platform receives the air inlet temperature data of the different braking energy feedback devices of the N substations and expresses the data as { T } in1 ,T in2 ，…，T inN Executing the following operations:
s101, setting a temperature difference threshold value of an air inlet as T in_max And setting the temperature of an air inlet of the ith braking energy feedback device in the N substations as T ini I =1,2, \ 8230, N, average air inlet temperature is T in_avg ；
S102, feeding the i braking energy back to the air inlet temperature T of the device ini With the mean value T of the temperature of the air inlet in_avg Comparing;
s103, if T ini -T in_avg ﹥T in_max If the air inlet ambient temperature of the ith braking energy feedback device is abnormal, the analysis processing server transmits the abnormal condition of the air inlet ambient temperature of the ith braking energy feedback device to the display unit for early warning; if T ini -T in_avg ≤T in_max Returning to S102.
Here, according to the temperature condition at the air inlet, the possible heat dissipation abnormity that exists at the air inlet that braking energy feedback device is located is analyzed, and the abnormal condition is transmitted to the display unit to carry out the early warning.
Preferably, the wind speed data of the air inlet, which is received by the analysis processing server of the early warning display platform and is measured and processed by the first wind speed measurement processing device, is WS 1 The current data in the fan circuit measured by the current measuring device is I raf The blade rotating speed data measured by the blade rotating speed measuring device is R ev ；
Analyzing and processing server sends current data I raf Converted into a corresponding wind speed WS 2 Firstly, the power of the fan is obtained through the calculation of current data, then the rotating speed of the fan is calculated through the power of the fan, and then the rotating speed is converted into the wind speed WS 2 The wind speed is the wind speed corresponding to the current data when the wind channel is normal; the analysis processing server transmits the blade rotating speed data R ev Converted into a corresponding wind speed WS 3 And the wind speed corresponding to the rotating speed of the fan blade when the wind channel is normal is obtained, and then the following operations are executed:
s201, wind speed WS 2 And wind speed WS 3 Respectively and uniformly corresponding to the wind speed data WS 1 Carrying out comparison;
s202, if WS 3 ≥WS 1 Or WS 2 ≥WS 1 When the air duct has the blockage situation of the heat dissipation filter screen, the analysis processing server sends out a filter screen blockage early warning and transmits early warning information to the display unit; otherwise, the air duct runs normally, and step S203 is executed;
s203, judge WS 2 Whether or not it is greater than WS 3 If the fan is defective, the analysis server sends out an abnormal aging fault early warning of the fan and transmits early warning information to the display unit; otherwise, return to step S201.
Here, WS 3 The wind speed corresponding to the rotating speed of the fan blade when the wind channel is normal is represented, the wind speed corresponding to the current data when the wind channel is normal is represented by WS2, the collected actual wind speed is represented by WS1, and the wind speed is obtained according to the windThe condition of speed judges whether a cooling fan and an air channel used for the braking energy feedback device are abnormal, if so, a filter screen blockage early warning and a fan abnormal aging fault early warning are sent out to remind operation and maintenance personnel to replace in time, and the operation reliability of the equipment is further improved.
Preferably, the air outlet measurement processing unit includes:
the second temperature measurement processing device is arranged at the air outlet, and is used for measuring to obtain currents at different temperatures at the air outlet and processing the currents into corresponding temperature data;
and the second wind speed measuring and processing device measures the wind pressure at the air outlet and processes the wind pressure into corresponding wind speed data.
Preferably, it is assumed that N substations are equipped with braking energy feedback devices in the urban rail line, and the analysis processing server of the early warning display platform receives the air outlet temperature data of different braking energy feedback devices of the N substations and represents the data as { T } out1 ,T out2 ，…，T outN The received wind speed data of the air outlet is WS 4 Performing the following operations:
s301, setting a temperature difference threshold value of an air outlet as T out_max The wind speed difference threshold is WS out_max Let the air outlet temperature of the ith braking energy feedback device in the N substations be represented as T outi I =1,2, \8230, N, the average value of the air outlet temperature is T out_avg ；
S302, feeding back the air outlet temperature T of the ith braking energy to the device outi With the mean value T of the temperature at the air outlet out_avg Let the wind speed WS 3 And WS 4 Carrying out comparison;
s303. If T outi -T out_avg ﹥T out_max And the wind speed WS corresponding to the blade rotating speed data 3 -WS 4 ﹥WS out_max If the air outlet environment temperature of the ith braking energy feedback device is abnormal and has the possibility of blockage, the analysis processing server analyzes the abnormal condition and the possibility of blockage of the air outlet environment temperature of the ith braking energy feedback deviceThe condition is transmitted to a display unit for early warning; otherwise, return to S302.
Here, according to the temperature and the wind speed condition at the air outlet, the possible heat dissipation abnormity that exists at the air outlet where the braking energy feedback device is located is analyzed, and the abnormal condition is transmitted to the display unit to perform early warning.
Preferably, the temperature measurement processing unit arranged on the radiating substrate of the braking energy feedback device collects temperature simulation data T on the radiating substrate of the braking energy feedback device igbt And its corresponding time point t igbt The temperature simulation data T is uploaded to an early warning display platform through a data collection unit, and an analysis processing server of the early warning display platform simulates the temperature simulation data T igbt And its corresponding time point t igbt Fitting to a temperature rise curve of a heat dissipation substrate of the braking energy feedback device, and extracting the maximum temperature rise speed Slope of the temperature rise curve, namely the maximum Slope value Slope of the temperature rise curve igbt_max With a preset Slope maximum Slope max For comparison, if Slope igbt_max ≤Slope max The temperature rise of the heat dissipation substrate of the braking energy feedback device is normal; otherwise, the analysis processing server transmits the abnormal result of the braking energy feedback device heat dissipation substrate or the braking energy feedback device to the display unit for early warning.
Compared with the prior art, the technical scheme of the invention has the beneficial effects that:
the invention provides a heat dissipation abnormity early warning system of an urban rail brake energy feedback device, the temperature of an air inlet where the brake energy feedback device is located is monitored in real time, the air speed of the air inlet, the current in a fan circuit, the rotating speed of blades on a fan, the temperature of a brake energy feedback device heat dissipation substrate, the temperature of an air outlet and the air speed data of the air outlet are monitored and collected, the air inlet is arranged, an air channel, the fan, the heat dissipation substrate and the angle of the air outlet are monitored and analyzed in an all-dimensional mode, the collected data are transmitted to an early warning display platform, the heat dissipation abnormity condition of the urban rail brake energy feedback device is analyzed by the early warning display platform, and the early warning display is carried out on the heat dissipation abnormity condition, so that operation and maintenance personnel can master the heat dissipation condition of the brake energy feedback device in real time, the explosion phenomenon caused by abnormal heat dissipation is avoided when the brake energy feedback device works, the safety and stability of equipment operation are ensured, and the operation and the brake energy management efficiency is improved.
Drawings
Fig. 1 is a schematic structural diagram of a heat dissipation abnormality warning system of an urban rail braking energy feedback device provided in embodiment 1 of the present invention;
fig. 2 is a schematic flow chart illustrating a process of performing a heat dissipation abnormality early warning by an analysis processing server at an air inlet according to embodiment 2 of the present invention;
fig. 3 is a schematic flow chart illustrating a process of performing a heat dissipation abnormality warning on an analysis processing server for an air duct and a fan per se according to embodiment 2 of the present invention;
fig. 4 is a schematic flow chart illustrating a process of performing a heat dissipation abnormality early warning at an air outlet by an analysis processing server according to embodiment 3 of the present invention.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the patent;
for better illustration of the present embodiment, certain parts of the drawings may be omitted, enlarged or reduced, and do not represent actual dimensions;
it will be understood by those skilled in the art that certain well-known descriptions of the figures may be omitted.
The technical solution of the present invention is further described below with reference to the accompanying drawings and examples.
The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent;
example 1
As shown in fig. 1, this embodiment provides an abnormal heat dissipation warning system for an urban rail braking energy feedback device, referring to fig. 1, the system includes: the system comprises an air inlet measuring and processing unit, a fan measuring and processing unit, a temperature measuring and processing unit arranged on a radiating substrate of a braking energy feedback device, an air outlet measuring and processing unit, a data collecting unit and an early warning display platform;
the air inlet measuring and processing unit is used for measuring and processing the temperature at the air inlet and the air speed at the air inlet; the fan measurement processing unit is used for measuring and processing the current in the fan circuit and the rotating speed of blades on the fan; the temperature measurement processing unit is used for measuring and processing the temperature of the brake energy feedback device heat dissipation substrate; the air outlet measurement processing unit is used for measuring and processing the temperature at the air outlet and the air speed at the air outlet;
as shown in fig. 1, structurally, the input end of the data collecting unit is connected to the air inlet measuring and processing unit, the fan measuring and processing unit, the temperature measuring and processing unit and the air outlet measuring and processing unit which are arranged on the heat dissipation substrate of the braking energy feedback device, and collects the temperature at the air inlet, the air speed at the air inlet, the current in the fan circuit, the blade rotation speed on the fan, the temperature of the heat dissipation substrate of the braking energy feedback device, the temperature at the air outlet and the air speed data information at the air outlet.
As shown in fig. 1, the early warning display platform is provided with an analysis processing server and a display unit, the analysis processing server analyzes and processes the received temperature at the air inlet, the air speed at the air inlet, the current in the fan circuit, the rotating speed of the blades on the fan, the temperature of the brake energy feedback device heat dissipation substrate, the temperature at the air outlet and the air speed data information at the air outlet to obtain the abnormal heat dissipation condition of the urban rail brake energy feedback device, and the early warning is performed on the abnormal heat dissipation condition and transmitted to the display unit.
In this embodiment, the braking energy feedback device heat dissipation substrate is an IGBT module radiator, this embodiment is directed to the braking energy feedback device equipped with a fan and a heat dissipation substrate, the temperature at the air inlet where the braking energy feedback device is located can be monitored and collected on line in real time, the air speed at the air inlet, the current in the fan circuit, the blade speed on the fan, the temperature of the braking energy feedback device heat dissipation substrate, the temperature at the air outlet and the air speed data at the air outlet are monitored and collected, from the air inlet, the air duct, the fan itself, the heat dissipation substrate itself and the angle of the air outlet, the omnidirectional monitoring analysis is performed, the collected data are transmitted to the early warning display platform, the abnormal situation of the braking energy feedback device heat dissipation is analyzed by using the early warning display platform, the abnormal situation of the heat dissipation is early-warned and displayed, the early warning includes that the ambient temperature at the air inlet is abnormal, the early warning of the filter screen blockage, the abnormal aging of the heat dissipation fan is early warned, the abnormal warning at the air outlet, the early warning of the heat dissipation substrate, the abnormal temperature rise of the braking energy feedback device is early warned, thereby ensuring the abnormal temperature rise of the braking energy feedback device can be monitored and controlled in real time to the heat dissipation situation of the braking energy feedback device, when avoiding the operation of the explosive caused by the abnormal heat dissipation. The operation and maintenance management efficiency is improved.
Example 2
In this embodiment, the air inlet measurement processing unit includes:
the first temperature measurement processing device is arranged at the air inlet, measures and obtains currents at different temperatures at the air inlet, and processes the currents into corresponding air inlet temperature data;
and the first wind speed measurement processing device is arranged at the air inlet, measures the wind pressure at the air inlet and processes the wind pressure into corresponding wind speed data of the air inlet.
The first temperature measuring and processing device substantially comprises a temperature measuring device and a temperature processing device, the temperature measuring device and the temperature processing device are used in a matched mode, when the temperature measuring device measures the temperature, currents at different temperatures of the air inlet are obtained, and then the currents are converted into corresponding air inlet temperature data through the temperature processing device; the first wind speed measuring and processing device substantially comprises a wind speed measuring device and a wind speed processing device, the wind speed measuring device is matched with the wind speed processing device for use, when the wind speed measuring device measures the temperature, the wind pressure at the air inlet is obtained, and the wind speed processing device processes the wind pressure into corresponding wind speed data of the air inlet.
In this embodiment, the fan measurement processing unit includes:
the current measuring device is used for measuring current data in a fan circuit of a fan arranged at the air inlet;
and the blade rotating speed measuring device is used for measuring blade rotating speed data of the fan arranged at the air inlet.
The analysis processing server analyzes possible heat dissipation abnormity of the air inlet where the braking energy feedback device is located according to the temperature condition of the air inlet by combining the functions of the air inlet measurement processing unit and the fan measurement processing unit, and transmits the abnormal condition to the display unit for early warning.
If N substations in the urban rail line are provided with braking energy feedback devices, the analysis processing server of the early warning display platform receives the air inlet temperature data of the different braking energy feedback devices of the N substations and expresses the data as { T } in1 ,T in2 ，…，T inN Executing the following operations as shown in fig. 2:
s101, setting a temperature difference threshold value of an air inlet as T in_max Setting the air inlet temperature of the ith braking energy feedback device in the N substations as T ini I =1,2, \ 8230, N, average air inlet temperature is T in_avg ；
S102, feeding the ith braking energy back to the air inlet temperature T of the device ini With the mean value T of the temperature of the air inlet in_avg Comparing;
s103, if T ini -T in_avg ﹥T in_max If the air inlet ambient temperature of the ith braking energy feedback device is abnormal, the analysis processing server transmits the abnormal condition of the air inlet ambient temperature of the ith braking energy feedback device to the display unit for early warning; if T ini -T in_avg ≤T in_max Returning to S102.
The analysis processing server provided with the early warning display platform receives the measurement processing of the first wind speed measurement processing deviceThe obtained wind speed data of the air inlet is WS 1 The current data in the fan circuit measured by the current measuring device is I raf The blade rotating speed data measured by the blade rotating speed measuring device is R ev ；
Analyzing and processing server sends current data I raf Converted into a corresponding wind speed WS 2 Firstly, the power of the fan is obtained through the calculation of current data, then the rotating speed of the fan is calculated through the power of the fan, and then the rotating speed is converted into the wind speed WS 2 The wind speed is the wind speed corresponding to the current data when the wind channel is normal; the analysis processing server transmits the blade rotating speed data R ev Converted into a corresponding wind speed WS 3 If the wind speed is normal, the wind speed corresponding to the rotating speed of the fan blades is judged to be abnormal according to the condition of the wind speed, and if the wind speed is abnormal, a filter screen blockage early warning and a fan abnormal aging fault early warning are sent out, and the following operations shown in the figure 3 are executed:
s201, wind speed WS 2 And wind speed WS 3 Respectively and uniformly correspond to the wind speed data WS 1 Comparing;
s202, if WS 3 ≥WS 1 Or WS 2 ≥WS 1 When the air duct has the blockage situation of the heat dissipation filter screen, the analysis processing server sends out a filter screen blockage early warning and transmits early warning information to the display unit; otherwise, the air duct operates normally, and step S203 is executed;
s203, judge WS 2 Whether or not it is greater than WS 3 If the fan is defective, the analysis server sends out an abnormal aging fault early warning of the fan and transmits early warning information to the display unit; otherwise, return to step S201.
When the early warning display platform finds the situation provided by the embodiment, the early warning information and the reason explanation of possible temperature abnormity are displayed on the display screen immediately.
Example 3
In this embodiment, the air outlet measurement processing unit includes:
the second temperature measurement processing device is arranged at the air outlet and used for measuring currents at different temperatures at the air outlet and processing the currents into corresponding temperature data;
and the second wind speed measuring and processing device is arranged at the air outlet and used for measuring the wind pressure at the air outlet and processing the wind pressure into corresponding wind speed data.
As shown in fig. 4, it is assumed that N substations are equipped with braking energy feedback devices in an urban rail line, and the analysis processing server of the early warning display platform receives the air outlet temperature data of different braking energy feedback devices of the N substations and represents the data as { T } out1 ,T out2 ，…，T outN The received wind speed data of the air outlet is WS 4 The following operations are performed:
s301, setting the temperature difference threshold value of the air outlet as T out_max The wind speed difference threshold is WS out_max Let the air outlet temperature of the ith braking energy feedback device in the N substations be represented as T outi I =1,2, \8230, N, the average value of the air outlet temperature is T out_avg ；
S302, feeding back the air outlet temperature T of the ith braking energy to the device outi With the mean value T of the temperature at the air outlet in_avg Let the wind speed WS 3 And WS 4 Comparing;
s303, if T outi -T out_avg ﹥T out_max And the wind speed WS corresponding to the blade rotating speed data 3 -WS 4 ﹥WS out_max If the air outlet environment temperature of the ith braking energy feedback device is abnormal and the blocking possibility exists, the analysis processing server transmits the abnormal condition of the air outlet environment temperature and the blocking possibility of the ith braking energy feedback device to the display unit for early warning; otherwise, return to S302.
According to the embodiment, the heat dissipation abnormity possibly existing at the air outlet where the braking energy feedback device is located is analyzed according to the temperature and the air speed condition at the air outlet, and the abnormal condition is transmitted to the display unit for early warning.
When the early warning display platform finds the situation provided by the embodiment, the early warning information and the reason explanation of possible temperature abnormity are displayed in the display screen immediately.
Example 4
In this embodiment, the braking energy feedback device heat dissipation substrate is an IGBT module heat sink, and the temperature measurement processing unit disposed on the braking energy feedback device heat dissipation substrate collects temperature analog data T on the braking energy feedback device heat dissipation substrate igbt And its corresponding time point t igbt The temperature simulation data T is uploaded to an early warning display platform through a data collection unit, and an analysis processing server of the early warning display platform simulates the temperature simulation data T igbt And its corresponding time point t igbt Fitting the temperature rise curve into a heat dissipation substrate of the braking energy feedback device, and extracting the maximum temperature rise speed in the temperature rise curve, namely the maximum Slope of the temperature rise curve igbt_max With a preset Slope maximum Slope max For comparison, if Slope igbt_max ≤Slope max The temperature rise of the heat dissipation substrate of the braking energy feedback device is normal; otherwise, the analysis processing server transmits the abnormal result of the braking energy feedback device heat dissipation substrate or the braking energy feedback device to the display unit for early warning.
When the early warning display platform finds the situation provided by the embodiment, the early warning information and the reason explanation of possible temperature abnormity are displayed on the display screen immediately.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. The utility model provides an unusual early warning system of urban rail braking energy feedback device heat dissipation which characterized in that includes: the system comprises an air inlet measuring and processing unit, a fan measuring and processing unit, a temperature measuring and processing unit arranged on a radiating substrate of a braking energy feedback device, an air outlet measuring and processing unit, a data collecting unit and an early warning display platform;
the air inlet measuring and processing unit is used for measuring and processing the temperature at the air inlet and the air speed at the air inlet; the fan measurement processing unit is used for measuring and processing the current in the fan circuit and the rotating speed of blades on the fan; the temperature measurement processing unit is used for measuring and processing the temperature of the brake energy feedback device heat dissipation substrate; the air outlet measurement processing unit is used for measuring and processing the temperature at the air outlet and the air speed at the air outlet; the data collection unit collects the temperature of the air inlet, the air speed of the air inlet, the current in a fan circuit, the blade rotating speed on the fan, the temperature of the brake energy feedback device heat dissipation substrate, the temperature of the air outlet and the air speed data information of the air outlet, and transmits the collected information to the early warning display platform, and the early warning display platform analyzes the abnormal heat dissipation condition of the urban rail brake energy feedback device according to the received information and carries out early warning display on the abnormal heat dissipation condition.
2. The urban rail braking energy feedback device heat dissipation abnormity early warning system according to claim 1, further comprising a communication unit, wherein the communication unit receives the temperature at the air inlet, the air speed at the air inlet, the current in the fan circuit, the rotating speed of the blades on the fan, the temperature of the braking energy feedback device heat dissipation substrate, the temperature at the air outlet and the air speed information data at the air outlet transmitted by the data collection unit, and then transmits the information to the early warning display platform.
3. The system of claim 1, wherein the early warning display platform is provided with an analysis server and a display unit, and the analysis server analyzes and processes received data information of the temperature at the air inlet, the air speed at the air inlet, the current in the fan circuit, the rotating speed of blades on the fan, the temperature of the heat dissipation substrate of the braking energy feedback device, the temperature at the air outlet, and the air speed at the air outlet to obtain the abnormal heat dissipation condition of the urban rail braking energy feedback device, and warns the abnormal heat dissipation condition and transmits the data information to the display unit.
4. The urban rail braking energy feedback device heat dissipation abnormity early warning system according to claim 3, wherein the air inlet measurement processing unit comprises:
the first temperature measurement processing device is arranged at the air inlet, measures and obtains currents at different temperatures at the air inlet, and processes the currents into corresponding air inlet temperature data;
and the first wind speed measurement processing device is arranged at the air inlet, measures the wind pressure at the air inlet and processes the wind pressure into corresponding wind speed data of the air inlet.
5. The urban rail braking energy feedback device heat dissipation abnormity early warning system according to claim 4, wherein the fan measurement processing unit comprises:
the current measuring device is used for measuring current data in a fan circuit of a fan arranged at the air inlet;
and the blade rotating speed measuring device is used for measuring blade rotating speed data of the fan arranged at the air inlet.
6. The urban rail braking energy feedback device heat dissipation abnormity early warning system according to claim 4, wherein N substations equipped with braking energy feedback devices in an urban rail line are set, and the analysis processing server of the early warning display platform receives air inlet temperature data of different braking energy feedback devices of the N substations and represents { T } temperature data in1 ,T in2 ，…，T inN Executing the following operations:
s101, setting a temperature difference threshold value of an air inlet as T in_max Setting the air inlet temperature of the ith braking energy feedback device in the N substations as T ini I =1,2, \ 8230, N, average air inlet temperature is T in_avg ；
S102, feeding the ith braking energy back to the air inlet temperature T of the device ini And the average value T of the temperature of the air inlet in_avg Comparing;
s103, if T ini -T in_avg ﹥T in_max If the air inlet ambient temperature of the ith braking energy feedback device is abnormal, the analysis processing server transmits the abnormal condition of the air inlet ambient temperature of the ith braking energy feedback device to the display unit for early warning; if T ini -T in_avg ≤T in_max Returning to S102.
7. The urban rail braking energy feedback device heat dissipation abnormity early warning system according to claim 5, wherein an analysis processing server provided with an early warning display platform receives air inlet air speed data WS obtained by measurement processing of the first air speed measurement processing device 1 The current data in the fan circuit measured by the current measuring device is I raf The blade rotating speed data measured by the blade rotating speed measuring device is R ev ；
Analyzing and processing server sends current data I raf Converted into a corresponding wind speed WS 2 Firstly, the power of the fan is obtained through the calculation of current data, then the rotating speed of the fan is calculated through the power of the fan, and the rotating speed is converted into the wind speed WS 2 The wind speed is the wind speed corresponding to the current data when the wind channel is normal; the analysis processing server transmits the blade rotating speed data R ev Converted into a corresponding wind speed WS 3 And the wind speed corresponding to the rotating speed of the fan blade when the wind channel is normal is obtained, and then the following operations are executed:
s201, wind speed WS 2 And wind speed WS 3 Respectively and uniformly corresponding to the wind speed data WS 1 Comparing;
s202, if WS 3 ≥WS 1 Or WS 2 ≥WS 1 When the air duct has the blockage condition of the heat dissipation filter screen, the analysis processing server sends out a filter screen blockage early warning and transmits early warning information to the display unit; otherwise, the air duct operates normally, and step S203 is executed;
s203, judging WS 2 Whether or not it is greater than WS 3 If the fan is defective, the analysis server sends out abnormal aging fault early warning of the fan and transmits early warning informationTo the display unit; otherwise, return to step S201.
8. The system of claim 7, wherein the air outlet measurement processing unit comprises:
the second temperature measurement processing device is arranged at the air outlet and used for measuring currents at different temperatures at the air outlet and processing the currents into corresponding temperature data;
and the second wind speed measuring and processing device is arranged at the air outlet and used for measuring the wind pressure at the air outlet and processing the wind pressure into corresponding wind speed data.
9. The system of claim 8, wherein N substations with braking energy feedback devices are arranged in an urban rail line, and the analysis processing server of the warning display platform receives air outlet temperature data of different braking energy feedback devices of the N substations, and the data is expressed as { T } T out1 ,T out2 ，…，T outN The received wind speed data of the air outlet is WS 4 The following operations are performed:
s301, setting a temperature difference threshold value of an air outlet as T out_max The wind speed difference threshold is WS out_max Let the air outlet temperature of the ith braking energy feedback device in the N substations be represented as T outi I =1,2, \ 8230, N, the average value of the air outlet temperature is T out_avg ；
S302, feeding back the air outlet temperature T of the ith braking energy to the device outi With the mean value T of the temperature at the air outlet out_avg Let the wind speed WS 3 And WS 4 Carrying out comparison;
s303. If T outi -T out_avg ﹥T out_max And the wind speed WS corresponding to the blade rotating speed data 3 -WS 4 ﹥WS out_max If the ambient temperature of the air outlet of the ith braking energy feedback device is abnormal and the blockage possibility exists, the analysis processing server feeds back the ith braking energyThe abnormal ambient temperature condition of the air outlet where the device is located and the condition with the possibility of blockage are transmitted to a display unit for early warning; otherwise, return to S302.
10. The system of claim 3, wherein the temperature measurement processing unit disposed on the heat dissipation substrate of the braking energy feedback device collects temperature simulation data T on the heat dissipation substrate of the braking energy feedback device igbt And its corresponding time point t igbt The temperature simulation data T is uploaded to an early warning display platform through a data collection unit, and an analysis processing server of the early warning display platform simulates the temperature simulation data T igbt And its corresponding time point t igbt Fitting to a temperature rise curve of a heat dissipation substrate of the braking energy feedback device, and extracting the maximum temperature rise speed Slope of the temperature rise curve, namely the maximum Slope value Slope of the temperature rise curve igbt_max With a preset Slope maximum Slope max For comparison, if Slope igbt_max ≤Slope max If so, the temperature rise of the brake energy feedback device radiating substrate is normal; otherwise, the analysis processing server transmits the abnormal result of the braking energy feedback device heat dissipation substrate or the braking energy feedback device to the display unit for early warning.
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