CN117542167A - Heat dissipation abnormality early warning system of urban rail bidirectional converter and control method thereof - Google Patents
Heat dissipation abnormality early warning system of urban rail bidirectional converter and control method thereof Download PDFInfo
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
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Abstract
The invention provides a heat dissipation abnormality early warning system of a urban rail bidirectional converter and a control method thereof, wherein the heat dissipation abnormality early warning system comprises the following components in sequence: the system comprises a data acquisition unit, a detection unit and a fault early warning unit; the data acquisition unit is used for acquiring data of the heat dissipation module of the urban rail bidirectional converter in real time and sending the data to the detection unit for processing; the detection unit is used for processing the data sent by the data acquisition unit, acquiring a heat dissipation early warning result according to the processing result, and sending the heat dissipation early warning result to the fault early warning unit for early warning, so as to finish abnormal heat dissipation early warning; according to the invention, through collecting the data of the key parts of the bidirectional converter, the early warning result is uploaded to the display screen and the upper platform of the bidirectional converter for display, meanwhile, the relevant information is notified to operators for checking, the risk of the bidirectional converter is found in advance, the damage of the IGBT power module caused by the bad operation of the heat dissipation system is avoided, and the safety and reliability of the device are effectively ensured.
Description
Technical Field
The invention relates to the technical field of bidirectional converter devices and heat dissipation early warning, in particular to a heat dissipation abnormality early warning system of an urban rail bidirectional converter device and a control method thereof.
Background
In the current situation of increasing congestion of urban traffic, urban rail traffic with the advantages of large passenger capacity, high efficiency and the like is a preferred scheme for solving the problem. In urban rail train operation, the train is typically provided with traction load by diode-rectifier units. While taking into account the green energy saving requirements. And the braking energy of the train is absorbed and reused by the braking energy feedback device. At present, along with the continuous improvement of the density of urban rail transit networks, the reduction of the complexity of urban rail power supply systems is a way for effectively reducing investment cost and management and maintenance cost. The urban rail bidirectional converter aims at providing traction load for the train and feeding back the energy of the train braking, namely, the urban rail bidirectional converter has two working modes.
The bidirectional converter is a device capable of realizing bidirectional conversion of electric energy between alternating current and direct current, and can absorb and invert the regenerative electric braking energy of the urban rail vehicle into alternating current with the same frequency and same phase as the power grid voltage when the bidirectional converter is in an inversion working condition and send the alternating current back to the power grid; when the working condition is a rectifying state, traction power can be provided for the train, and the stability of the direct current network voltage is maintained.
The core of the bidirectional converter device is a high-power switching device IGBT (Insulated Gate Bipolar Transistor ). The IGBT power module is a compound fully-controlled voltage-driven power semiconductor device composed of a BJT (bipolar transistor) and a MOS (insulated gate field effect transistor), the IGBT generates large heat when working, if the heat is gathered rapidly in a short time, many adverse effects are generated to the IGBT, even serious accidents such as IGBT explosion are caused, so the heat dissipation of the bidirectional converter is an important study about guaranteeing the power supply safety. The main stream heat dissipation mode of the IGBT in the current bidirectional converter is to assemble the IGBT and a heat dissipation substrate into an IGBT power module, and then to dissipate heat through a high-speed fan.
The switching of two working conditions of the bidirectional converter is directly related to the operation condition of vehicles on a line, the network voltage of the contact network is raised to a certain extent when the train brakes, at the moment, the bidirectional converter is in a working mode of braking energy feedback, when the train is restarted, in order to keep the voltage of the contact network stable, the bidirectional converter can be converted into a working mode of traction energy supply, the two working conditions can both cause the power of the IGBT module to be continuously kept at megawatts in one period, particularly, the power peak value under the traction working condition can reach 9 to 12MW, that is, the temperature of the IGBT can be rapidly raised in a short time. In order to ensure the normal operation of the heat dissipation system, the existing high-speed heat dissipation fan is always in a forced starting state, and the long-term high-speed operation state can aggravate the aging of the fan to a certain extent, so that the health state of the heat dissipation fan is the key of the normal operation of the heat dissipation system. Meanwhile, PM10 dust and the like often exist in the substation, so that a worker generally installs a dustproof filter screen at an air inlet of a fan air duct so as to prevent dust from entering the equipment, and therefore ensuring that the filter screen is clean is also an important means for maintaining a heat dissipation system. Moreover, because the back side of the IGBT module is additionally provided with the supporting capacitor assembly, people also independently design a narrower auxiliary air duct for the capacitor assembly, and the operation condition of the auxiliary air duct also needs to be monitored.
The heat dissipation system comprises an IGBT power module, an NTC thermistor for measuring the temperature of the IGBT power module, a wind speed measuring device arranged in a heat dissipation air duct of the IGBT power module, a heat dissipation fan arranged in the heat dissipation air duct, a current measuring device for measuring the current of a fan circuit arranged in a heat dissipation fan circuit, a first sampling conditioning unit module, a second sampling conditioning unit module, a third sampling conditioning unit module and a control unit; according to the scheme in the prior art, various abnormal conditions of the power module heat dissipation fan system are detected and timely uploaded to the control system, the control system issues an IGBT pulse blocking instruction to turn off an IGBT, so that the risk of explosion of the IGBT power module is avoided, but the scheme only detects faults and feeds back after the temperature of the IGBT module is too high, has certain hysteresis, and cannot early warn abnormal conditions; in addition, the situation of blockage of the air duct and the filter screen can still be judged by experience only through manual observation, and risks cannot be found in advance.
Disclosure of Invention
The invention provides a heat dissipation abnormality early warning system of a urban rail bidirectional converter device and a control method thereof, which are used for overcoming the defect that the prior art cannot find the risk of a heat dissipation system in advance and early warn, wherein the early warning result is uploaded to a display screen of the device and an upper platform for display by a fault early warning module through collecting key part data of the bidirectional converter device; meanwhile, relevant information is notified to operators for checking, risks of the bidirectional converter device are found in advance, damage to the IGBT power module caused by poor operation of the heat dissipation system is avoided, and safety and reliability of equipment are effectively guaranteed.
In order to solve the technical problems, the technical scheme of the invention is as follows:
an unusual early warning system of urban rail bidirectional converter heat dissipation, urban rail bidirectional converter includes: the heat dissipation module comprises M IGBT power modules, support capacitor assemblies arranged on the back sides of all the IGBT power modules and heat dissipation modules used for dissipating heat of all the IGBT power modules and the support capacitor assemblies, wherein the heat dissipation modules comprise the following components in sequence: air intake, wind channel, fan and air outlet, the wind channel is including the main air duct that sets up side by side and assisting the wind channel, and all IGBT power module all set up inside the main air duct, and the supporting capacitor subassembly sets up inside assisting the wind channel, and M is positive integer, the unusual early warning system of temperature is including connecting gradually: the system comprises a data acquisition unit, a detection unit and a fault early warning unit;
the data acquisition unit is used for acquiring data of the heat dissipation module of the urban rail bidirectional converter in real time and sending the data to the detection unit for processing;
the detection unit is used for processing the data sent by the data acquisition unit, acquiring a heat dissipation early warning result according to the processing result, and sending the heat dissipation early warning result to the fault early warning unit for early warning, so that abnormal heat dissipation early warning is completed;
The data acquisition unit comprises a plurality of data acquisition units which are connected with the detection unit: the device comprises an air inlet outside temperature measuring device, an air inlet inside temperature measuring device, M IGBT power module temperature measuring devices, a supporting capacitor assembly temperature measuring device, an air outlet temperature measuring device, an air inlet wind speed transmitter, an auxiliary air channel wind speed transmitter, a fan current measuring device and a fan rotating speed measuring device.
Preferably, the data acquisition unit is further provided with a first temperature receiving unit, a second temperature receiving unit, a third temperature receiving unit, a fourth temperature receiving unit and a fifth temperature receiving unit;
the temperature measuring device at the outer side of the air inlet is connected with the detecting unit through a first temperature receiving unit, the temperature measuring device at the inner side of the air inlet is connected with the detecting unit through a second temperature receiving unit, the temperature measuring device of each IGBT power module is connected with the detecting unit through a third temperature receiving unit, the temperature measuring device of the supporting capacitor assembly is connected with the detecting unit through a fourth temperature receiving unit, and the temperature measuring device of the air outlet is connected with the detecting unit through a fifth temperature receiving unit.
Preferably, a filter screen is further arranged in the heat dissipation module of the urban rail bidirectional converter, and the filter screen is arranged between the air inlet and the air duct;
The fault early warning unit includes: the system comprises a communication module, a display screen and an upper platform;
the detection unit is connected with the fault early warning unit in a wireless or wired mode through the communication module, and the output end of the communication module is connected with the display screen and the upper platform respectively.
The invention also provides a control method of the urban rail bidirectional converter heat dissipation abnormality early warning system, which is based on the urban rail bidirectional converter heat dissipation abnormality early warning system, wherein the data acquisition unit acquires the data of the urban rail bidirectional converter heat dissipation module in real time and sends the data to the detection unit for processing;
the detection unit processes the data sent by the data acquisition unit, obtains a heat dissipation early warning result according to the processing result, and sends the heat dissipation early warning result to the fault early warning unit for early warning, so that abnormal heat dissipation early warning is completed;
the detection unit performs the following processing:
processing according to temperature data obtained by the air inlet outside temperature measuring device and the air inlet inside temperature measuring device, and obtaining a heat dissipation abnormality early warning result of the internal environment of the urban rail bidirectional converter;
processing according to temperature data obtained by the temperature measuring device at the outer side of the air inlet, and obtaining a heat dissipation abnormality early warning result of the external environment of the urban rail bidirectional converter;
Processing according to temperature data obtained by all IGBT power module temperature measuring devices, and obtaining heat dissipation abnormality early warning results of the IGBT power modules of the urban rail bidirectional converter;
processing according to data obtained by the air inlet wind speed transducer, the fan current measuring device and the fan rotating speed measuring device, and obtaining fault early warning results of a filter screen of the urban rail bidirectional converter and the fan;
processing according to data obtained by the air outlet temperature measuring device and the fan rotating speed measuring device, and obtaining an early warning result of high-temperature operation of the urban rail bidirectional converter;
and processing according to the data obtained by the supporting capacitor assembly temperature measuring device and the auxiliary air duct wind speed transducer, and obtaining an abnormal early warning result of the supporting capacitor assembly and the auxiliary air duct of the urban rail bidirectional converter.
Preferably, the method for obtaining the heat dissipation abnormality early warning result of the internal environment of the urban rail bidirectional converter device comprises the following steps:
s1.1: the air inlet outside temperature measuring device and the air inlet inside temperature measuring device respectively measure the temperature T outside the air inlet ai-out1 And the temperature T at the inner side of the air inlet ai-in1 And respectively sending the temperature signals to the detection unit through the first temperature receiving unit and the second temperature receiving unit;
S1.2: the detection unit calculates the temperature T outside the air inlet ai-out1 And the temperature T at the inner side of the air inlet ai-in1 And judging whether the absolute value of the first difference is greater than or equal to a preset first threshold T ai-max If the temperature is higher than or equal to the preset temperature, the internal environment of the urban rail bidirectional converter is abnormal in heat dissipation, otherwise, the internal environment of the urban rail bidirectional converter is not abnormal.
Preferably, the method for obtaining the heat dissipation abnormality early warning result of the urban rail bidirectional converter device external environment comprises the following steps:
s2.1: the temperature measuring device outside the air inlet measures the temperature T outside the air inlet ai-out1 And sent to the detection unit through the first temperature receiving unit;
s2.2: the detection unit calculates the temperature T outside the air inlet ai-out1 And preset average temperature T outside the air inlet ai-out-avg And judging whether the absolute value of the second difference is greater than or equal to a preset second threshold T ai-out-max If the temperature is higher than or equal to the preset temperature, the external environment of the urban rail bidirectional converter is abnormal in heat dissipation, otherwise, the external environment of the urban rail bidirectional converter is not abnormal.
Preferably, the heat dissipation abnormality early warning result of the IGBT power module of the urban rail bidirectional converter is obtained by the following steps:
S3.1: m IGBT power module temperature measuring devices respectively measure temperatures T of corresponding IGBT power modules igbt1 ～T igbtM And respectively sending the temperature signals to the detection unit through the third temperature receiving unit;
s3.2: the detection unit is used for detecting the temperature T of the M IGBT power modules igbt1 ～T igbtM Calculating temperature mean value T of IGBT power module igbt-avg And a temperature change rate S of each IGBT power module igbt1 ～S igbtM ；
S3.3: the following steps are simultaneously executed:
respectively calculating a third difference value of the temperature of each IGBT power module and the temperature average value of the IGBT power modules, and respectively judging whether the absolute value of the third difference value is greater than or equal to a preset third threshold value T igbt-max ；
The temperature change rate S of each IGBT power module is respectively igbt1 ～S igbtM And a preset fourth threshold S igbt-max Comparing;
if the absolute value of the third difference value corresponding to one IGBT power module is greater than or equal to a third threshold value T igbt-max Or a temperature change rate of a certain IGBT power module is larger than or equal to a fourth threshold S igbt-max The IGBT power module in the urban rail bidirectional converter has abnormal heat dissipation; otherwise, the IGBT power module in the urban rail bidirectional converter device has no abnormal heat dissipation.
Preferably, the fault early warning result of the filter screen and the fan of the urban rail bidirectional converter is obtained by the following steps:
S4.1: the wind speed transmitter of the air inlet, the fan current measuring device and the fan rotating speed measuring device respectively measure the wind speed WS of the air inlet in Current I during fan operation fan And the actual rotation speed S of the fan blade fan And sending to a detection unit;
s4.2: the detection unit is used for detecting the current I when the fan operates fan Calculating theoretical blade rotating speed S when fan operates fan-I The method comprises the steps of carrying out a first treatment on the surface of the The detection unit is used for detecting the actual rotation speed S of the fan blade fan Acquiring actual wind speed WS when a fan operates out-S ；
S4.3: the detection unit calculates the theoretical blade rotating speed S when the fan operates fan-I And actual rotation speed S fan And judging whether the absolute value of the fourth difference is greater than or equal to a preset fifth threshold S fan-max If the wind power generation speed is greater than or equal to the preset speed, the fan of the urban rail bidirectional converter fails, otherwise, the fan of the urban rail bidirectional converter does not fail;
s4.4: the detection unit calculates the actual wind speed WS when the fan operates out-S And wind speed WS of air inlet in And judging whether the absolute value of the fifth difference is greater than or equal to a preset sixth threshold S in-max If the filter screen of the urban rail bidirectional converter is more than or equal to the filter screen, the filter screen of the urban rail bidirectional converter fails, otherwise, the filter screen of the urban rail bidirectional converter does not fail.
Preferably, the early warning result of the high-temperature operation of the urban rail bidirectional converter is obtained by the following steps:
S5.1: the air outlet temperature measuring device and the fan rotating speed measuring device respectively measure the temperature T of the air outlet out1 And the actual rotation speed S of the fan blade fan And sending to a detection unit;
s5.2: the detection unit is used for detecting the actual rotation speed S of the fan blade fan Acquiring actual wind speed WS when a fan operates out-S ；
S5.3: the detection unit calculates the temperature T of the air outlet out1 And a preset average temperature T of an air outlet out-avg And judging whether the absolute value of the sixth difference is greater than or equal to a preset seventh threshold T out-max If the wind speed is greater than or equal to the actual wind speed WS, judging the actual wind speed WS when the fan operates out-S Whether or not to be equal to the maximum wind speed WS preset by the fan out-max If the two-way converter is equal to the first value, the urban rail two-way converter is in an abnormal state of high-temperature operation; if the two-way converter is not equal to the two-way converter, the fan of the two-way converter has faults;
if the absolute value of the sixth difference value is smaller than the preset seventh threshold T out-max And the urban rail bidirectional converter is not abnormal.
Preferably, an abnormal early warning result of the supporting capacitor assembly and the auxiliary air duct of the urban rail bidirectional converter is obtained, and the method is carried out by the following steps:
s6.1: the temperature measuring device of the supporting capacitor component measures the temperature T of the supporting capacitor component C1 And sent to the detection unit through the fourth temperature receiving unit; the wind speed transmitter of the auxiliary wind channel measures the wind speed WS in the auxiliary wind channel C1 And sending to a detection unit;
s6.2: the detection unit calculates the temperature T of the supporting capacitor assembly C1 And a preset average temperature T of the supporting capacitor assembly C-avg And judging whether the absolute value of the seventh difference is greater than or equal to a preset eighth threshold T C-max If the temperature is higher than or equal to the temperature, the heat dissipation abnormality exists in the supporting capacitor component of the urban rail bidirectional converter; otherwise, the support capacitor component of the urban rail bidirectional converter has no abnormal heat dissipation;
s6.3: the detection unit judges the wind speed WS in the auxiliary air duct C1 Whether the air speed is smaller than or equal to a preset minimum air speed WS of the auxiliary air duct C-min If the air quantity is smaller than or equal to the air quantity, the auxiliary air channel is abnormal; otherwise, the auxiliary air duct is not abnormal.
Compared with the prior art, the technical scheme of the invention has the beneficial effects that:
the invention provides a heat dissipation abnormality early warning system of a bidirectional converter device of a city rail and a control method thereof, wherein the bidirectional converter device of the city rail comprises: the heat dissipation module comprises M IGBT power modules, support capacitor assemblies arranged on the back sides of all the IGBT power modules and heat dissipation modules used for dissipating heat of all the IGBT power modules and the support capacitor assemblies, wherein the heat dissipation modules comprise the following components in sequence: air intake, wind channel, fan and air outlet, the wind channel is including the main air duct that sets up side by side and assisting the wind channel, and all IGBT power module all set up inside the main air duct, and the supporting capacitor subassembly sets up inside assisting the wind channel, and M is positive integer, the unusual early warning system of temperature is including connecting gradually: the system comprises a data acquisition unit, a detection unit and a fault early warning unit; the data acquisition unit is used for acquiring data of the heat dissipation module of the urban rail bidirectional converter in real time and sending the data to the detection unit for processing; the detection unit is used for processing the data sent by the data acquisition unit, acquiring a heat dissipation early warning result according to the processing result, and sending the heat dissipation early warning result to the fault early warning unit for early warning, so that abnormal heat dissipation early warning is completed;
The invention can monitor the bidirectional converter device in real time on line, analyze various anomalies possibly existing in the heat radiation system according to the temperature and wind speed information, report the anomaly information to a display and an upper stage platform, and inform relevant maintainers before the bidirectional converter device really breaks down, thereby avoiding the risk of explosion of the IGBT power module caused by abnormal heat radiation, ensuring the safety and stability of equipment, reducing the difficulty of operation and maintenance management and improving the data processing efficiency.
Drawings
Fig. 1 is a block diagram of a heat dissipation anomaly early warning system of a bidirectional converter device for urban rails according to embodiment 1.
Fig. 2 is a flowchart for obtaining a heat dissipation abnormality early warning result of an internal environment of the urban rail bidirectional converter according to embodiment 2.
Fig. 3 is a flowchart for obtaining a heat dissipation abnormality early warning result of an external environment of the urban rail bidirectional converter according to embodiment 2.
Fig. 4 is a flowchart for obtaining a heat dissipation abnormality early warning result of an IGBT power module of a urban rail bidirectional converter according to embodiment 2.
Fig. 5 is a flowchart for obtaining fault early warning results of a filter screen and a fan of a bidirectional converter device for urban rails according to embodiment 2.
Fig. 6 is a flowchart for obtaining the early warning result of the high-temperature operation of the urban rail bidirectional converter according to embodiment 2.
Fig. 7 is a flowchart for obtaining an abnormal early warning result of the supporting capacitor assembly and the auxiliary air duct of the urban rail bidirectional converter provided in embodiment 2.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the present patent;
for the purpose of better illustrating the embodiments, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the actual product dimensions;
it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The technical scheme of the invention is further described below with reference to the accompanying drawings and examples.
Example 1
As shown in fig. 1, this embodiment provides a heat dissipation anomaly early warning system of a bidirectional converter device for urban rails, where the bidirectional converter device for urban rails includes: the heat dissipation module comprises M IGBT power modules, support capacitor assemblies arranged on the back sides of all the IGBT power modules and heat dissipation modules used for dissipating heat of all the IGBT power modules and the support capacitor assemblies, wherein the heat dissipation modules comprise the following components in sequence: air intake, filter screen, wind channel, fan and air outlet, the wind channel is including the main air duct that sets up side by side and assisting the wind channel, and all IGBT power module all set up inside the main air duct, and the supporting capacitor subassembly sets up inside assisting the wind channel, and M is positive integer, the unusual early warning system of temperature is including connecting gradually: the system comprises a data acquisition unit, a detection unit and a fault early warning unit;
The data acquisition unit includes: the device comprises an air inlet outside temperature measuring device, an air inlet inside temperature measuring device, M IGBT power module temperature measuring devices, a supporting capacitor assembly temperature measuring device, an air outlet temperature measuring device, an air inlet wind speed transmitter, an auxiliary air duct wind speed transmitter, a fan current measuring device, a fan rotating speed measuring device, a first temperature receiving unit, a second temperature receiving unit, a third temperature receiving unit, a fourth temperature receiving unit and a fifth temperature receiving unit;
the temperature measuring device at the outer side of the air inlet is connected with the detecting unit through a first temperature receiving unit, the temperature measuring device at the inner side of the air inlet is connected with the detecting unit through a second temperature receiving unit, the temperature measuring device of each IGBT power module is connected with the detecting unit through a third temperature receiving unit, the temperature measuring device of the supporting capacitor assembly is connected with the detecting unit through a fourth temperature receiving unit, and the temperature measuring device of the air outlet is connected with the detecting unit through a fifth temperature receiving unit; the air inlet wind speed transducer, the auxiliary air duct wind speed transducer, the fan current measuring device and the fan rotating speed measuring device are respectively and directly connected with the detection unit;
The data acquisition unit is used for acquiring data of the heat dissipation module of the urban rail bidirectional converter in real time and sending the data to the detection unit for processing;
the detection unit is used for processing the data sent by the data acquisition unit, acquiring a heat dissipation early warning result according to the processing result, and sending the abnormal early warning result to the fault early warning unit for display and early warning, so as to finish heat dissipation abnormal early warning;
in this embodiment, the fault early warning unit includes: the system comprises a communication module, a display screen and an upper platform;
the detection unit is connected with the fault early warning unit in a wireless or wired mode through the communication module, and the output end of the communication module is connected with the display screen and the upper platform respectively.
In the specific implementation process, the data acquisition unit acquires the data of the heat dissipation module of the urban rail bidirectional converter in real time and sends the data to the detection unit for calculation;
in the embodiment, an air inlet outside temperature measuring device and an air inlet inside temperature measuring device are respectively arranged on the outer side and the inner side of the air inlet and are used for measuring the temperature of the outer side and the inner side of the air inlet; the temperature measuring devices of the M IGBT power modules are respectively in one-to-one correspondence with the M IGBT power modules and are used for measuring the temperature of each IGBT power module; the temperature measuring device of the supporting capacitor assembly is arranged on the supporting capacitor assembly and is used for measuring the temperature of the supporting capacitor assembly; the air outlet temperature measuring device is arranged at the air outlet and is used for measuring the temperature of the air outlet; the air inlet air speed transducer and the auxiliary air duct air speed transducer are respectively arranged at the air inlet and the auxiliary air duct and are respectively used for measuring the air speeds of the air inlet and the auxiliary air duct; the fan current measuring device is arranged in the fan circuit and is used for measuring the current of the fan during operation; the fan rotating speed measuring device is arranged on the blade of the fan and is used for measuring the rotating speed of the fan;
The detection unit (data collection unit) is directly arranged on the equipment body and used for calculating and analyzing real-time data;
the detection unit calculates according to the data sent by the data acquisition unit, acquires a heat dissipation early warning result according to the calculation result, and sends an abnormal early warning result to the fault early warning unit for display and early warning, so that heat dissipation abnormal early warning is completed;
the system can monitor the bidirectional converter device in operation in real time on line, analyze various anomalies possibly existing in the heat radiation system according to temperature and wind speed information, report the anomaly information to a display and an upper stage platform, and inform relevant maintainers before the bidirectional converter device really breaks down, thereby avoiding the risk of explosion of the IGBT power module caused by abnormal heat radiation, ensuring the safety and stability of equipment, reducing the difficulty of operation and maintenance management and improving the data processing efficiency.
Example 2
The embodiment provides a control method of a heat dissipation abnormality early warning system of a bidirectional urban rail converter, which is based on the heat dissipation abnormality early warning system of the bidirectional urban rail converter described in embodiment 1, wherein a data acquisition unit acquires data of a heat dissipation module of the bidirectional urban rail converter in real time and sends the data to a detection unit for processing;
The detection unit processes the data sent by the data acquisition unit, obtains a heat dissipation early warning result according to the processing result, and sends the heat dissipation early warning result to the fault early warning unit for early warning, so that abnormal heat dissipation early warning is completed;
the detection unit performs the following processing:
processing according to temperature data obtained by the air inlet outside temperature measuring device and the air inlet inside temperature measuring device, and obtaining a heat dissipation abnormality early warning result of the internal environment of the urban rail bidirectional converter;
processing according to temperature data obtained by the temperature measuring device at the outer side of the air inlet, and obtaining a heat dissipation abnormality early warning result of the external environment of the urban rail bidirectional converter;
processing according to temperature data obtained by all IGBT power module temperature measuring devices, and obtaining heat dissipation abnormality early warning results of the IGBT power modules of the urban rail bidirectional converter;
processing according to data obtained by the air inlet wind speed transducer, the fan current measuring device and the fan rotating speed measuring device, and obtaining fault early warning results of a filter screen of the urban rail bidirectional converter and the fan;
processing according to data obtained by the air outlet temperature measuring device and the fan rotating speed measuring device, and obtaining an early warning result of high-temperature operation of the urban rail bidirectional converter;
Processing according to data obtained by the temperature measuring device of the supporting capacitor assembly and the wind speed transducer of the auxiliary wind channel, and obtaining abnormal early warning results of the supporting capacitor assembly and the auxiliary wind channel of the urban rail bidirectional converter;
the method comprises the following steps of obtaining a heat dissipation abnormality early warning result of the internal environment of the urban rail bidirectional converter, wherein the heat dissipation abnormality early warning result is carried out by the following steps:
s1.1: the air inlet outside temperature measuring device and the air inlet inside temperature measuring device respectively measure the temperature T outside the air inlet ai-out1 And the temperature T at the inner side of the air inlet ai-in1 And respectively sending the temperature signals to the detection unit through the first temperature receiving unit and the second temperature receiving unit;
s1.2: the detection unit calculates the temperature T outside the air inlet ai-out1 And the temperature T at the inner side of the air inlet ai-in1 And judging whether the absolute value of the first difference is greater than or equal to a preset first threshold T ai-max If the temperature is higher than or equal to the temperature, the internal environment of the urban rail bidirectional converter is abnormal in heat dissipation, otherwise, the internal environment of the urban rail bidirectional converter is not abnormal;
the method comprises the following steps of obtaining a heat dissipation abnormality early warning result of an external environment of the urban rail bidirectional converter, wherein the heat dissipation abnormality early warning result is carried out by the following steps:
s2.1: the temperature measuring device outside the air inlet measures the temperature T outside the air inlet ai-out1 And sent to the detection unit through the first temperature receiving unit;
s2.2: the detection unitCalculating the temperature T outside the air inlet ai-out1 And preset average temperature T outside the air inlet ai-out-avg And judging whether the absolute value of the second difference is greater than or equal to a preset second threshold T ai-out-max If the temperature is higher than or equal to the preset temperature, the external environment of the urban rail bidirectional converter is abnormal in heat dissipation, otherwise, the external environment of the urban rail bidirectional converter is not abnormal;
the method comprises the following steps of obtaining a heat dissipation abnormality early warning result of an IGBT power module of the urban rail bidirectional converter, wherein the heat dissipation abnormality early warning result is carried out by the following steps:
s3.1: m IGBT power module temperature measuring devices respectively measure temperatures T of corresponding IGBT power modules igbt1 ～T igbtM And respectively sending the temperature signals to the detection unit through the third temperature receiving unit;
s3.2: the detection unit is used for detecting the temperature T of the M IGBT power modules igbt1 ～T igbtM Calculating temperature mean value T of IGBT power module igbt-avg And a temperature change rate S of each IGBT power module igbt1 ～S igbtM ；
S3.3: the following steps are simultaneously executed:
respectively calculating a third difference value of the temperature of each IGBT power module and the temperature average value of the IGBT power modules, and respectively judging whether the absolute value of the third difference value is greater than or equal to a preset third threshold value T igbt-max ；
The temperature change rate S of each IGBT power module is respectively igbt1 ～S igbtM And a preset fourth threshold S igbt-max Comparing;
if the absolute value of the third difference value corresponding to one IGBT power module is greater than or equal to a third threshold value T igbt-max Or a temperature change rate of a certain IGBT power module is larger than or equal to a fourth threshold S igbt-max The IGBT power module in the urban rail bidirectional converter has abnormal heat dissipation; otherwise, the IGBT power module in the urban rail bidirectional converter has no abnormal heat dissipation;
the method comprises the following steps of obtaining a fault early warning result of a filter screen and a fan of the urban rail bidirectional converter, wherein the fault early warning result is carried out by the following steps:
s4.1: the wind speed transmitter of the air inlet, the fan current measuring device and the fan rotating speed measuring device respectively measure the wind speed WS of the air inlet in Current I during fan operation fan And the actual rotation speed S of the fan blade fan And sending to a detection unit;
s4.2: the detection unit is used for detecting the current I when the fan operates fan Calculating theoretical blade rotating speed S when fan operates fan-I The method comprises the steps of carrying out a first treatment on the surface of the The detection unit is used for detecting the actual rotation speed S of the fan blade fan Acquiring actual wind speed WS when a fan operates out-S ；
S4.3: the detection unit calculates the theoretical blade rotating speed S when the fan operates fan-I And actual rotation speed S fan And judging whether the absolute value of the fourth difference is greater than or equal to a preset fifth threshold S fan-max If the wind power generation speed is greater than or equal to the preset speed, the fan of the urban rail bidirectional converter fails, otherwise, the fan of the urban rail bidirectional converter does not fail;
s4.4: the detection unit calculates the actual wind speed WS when the fan operates out-S And wind speed WS of air inlet in And judging whether the absolute value of the fifth difference is greater than or equal to a preset sixth threshold S in-max If the filter screen of the urban rail bidirectional converter is more than or equal to the filter screen, the filter screen of the urban rail bidirectional converter fails, otherwise, the filter screen of the urban rail bidirectional converter does not fail;
the method comprises the following steps of obtaining an early warning result of high-temperature operation of the urban rail bidirectional converter, wherein the early warning result is carried out by the following steps:
s5.1: the air outlet temperature measuring device and the fan rotating speed measuring device respectively measure the temperature T of the air outlet out1 And the actual rotation speed S of the fan blade fan And sending to a detection unit;
s5.2: the detection unit is used for detecting the actual rotation speed S of the fan blade fan Acquiring actual wind speed WS when a fan operates out-S ；
S5.3: the detection unit calculates the temperature T of the air outlet out1 And a preset average temperature T of an air outlet out-avg And determining whether the absolute value of the sixth difference is greater thanEqual to a preset seventh threshold T out-max If the wind speed is greater than or equal to the actual wind speed WS, judging the actual wind speed WS when the fan operates out-S Whether or not to be equal to the maximum wind speed WS preset by the fan out-max If the two-way converter is equal to the first value, the urban rail two-way converter is in an abnormal state of high-temperature operation; if the two-way converter is not equal to the two-way converter, the fan of the two-way converter has faults;
if the absolute value of the sixth difference value is smaller than the preset seventh threshold T out-max The urban rail bidirectional converter is not abnormal;
the method comprises the following steps of obtaining an abnormal early warning result of a supporting capacitor assembly and an auxiliary air duct of the urban rail bidirectional converter, and carrying out the following steps:
s6.1: the temperature measuring device of the supporting capacitor component measures the temperature T of the supporting capacitor component C1 And sent to the detection unit through the fourth temperature receiving unit; the wind speed transmitter of the auxiliary wind channel measures the wind speed WS in the auxiliary wind channel C1 And sending to a detection unit;
s6.2: the detection unit calculates the temperature T of the supporting capacitor assembly C1 And a preset average temperature T of the supporting capacitor assembly C-avg And judging whether the absolute value of the seventh difference is greater than or equal to a preset eighth threshold T C-max If the temperature is higher than or equal to the temperature, the heat dissipation abnormality exists in the supporting capacitor component of the urban rail bidirectional converter; otherwise, the support capacitor component of the urban rail bidirectional converter has no abnormal heat dissipation;
s6.3: the detection unit judges the wind speed WS in the auxiliary air duct C1 Whether the air speed is smaller than or equal to a preset minimum air speed WS of the auxiliary air duct C-min If the air quantity is smaller than or equal to the air quantity, the auxiliary air channel is abnormal; otherwise, the auxiliary air duct is not abnormal.
In the specific implementation process, the data acquisition unit acquires the data of the heat dissipation module of the urban rail bidirectional converter in real time and sends the data to the detection unit for calculation and processing;
the detection unit calculates and processes the data sent by the data acquisition unit, obtains a heat dissipation early warning result according to the data processing result, and sends an abnormal early warning result to the fault early warning unit for display and early warning, so that heat dissipation abnormal early warning is completed;
the detection unit is provided with a first thread, a second thread, a third thread, a fourth thread, a fifth thread and a sixth thread in parallel;
as shown in fig. 2, the specific flow of obtaining the heat dissipation abnormality early warning result of the internal environment of the urban rail bidirectional converter device is as follows: the temperature measuring device outside the air inlet collects the temperature information of the air inlet, and the temperature processing unit receives the information and converts the information into an analog quantity T ai-out1 Uploading the information to a detection unit, and converting the information into an analog quantity T by a temperature processing unit after the temperature measuring device at the inner side of the air inlet collects the related information ai-in1 And uploading to a detection unit; if T ai-out1 And T ai-in1 The difference of (2) exceeds a preset T ai-max Judging that the internal environment of the bidirectional converter device is abnormal, and sending out early warning of the internal environment of the bidirectional converter device;
as shown in fig. 3, a specific flow of obtaining a heat dissipation abnormality early warning result of an external environment of the urban rail bidirectional converter device is as follows: assuming that a certain urban rail line is provided with N power substations with bidirectional current transformation devices, an upper stage platform collects that the temperature of the outer side of an air inlet of each bidirectional current transformation device of each power substation is T ai-out1 ～T ai-outN N is also a positive integer; if the temperature data T of a certain bidirectional converter device ai-out And the temperature average value T outside the air inlet ai-out-avg The difference of (2) is greater than a preset maximum value T ai-out-max Judging that the external environment of the bidirectional converter device has a certain abnormality, and sending out early warning of the abnormality of the external environment of the bidirectional converter device;
as shown in fig. 4, a specific flow of obtaining a heat dissipation abnormality early warning result of an IGBT power module of the urban rail bidirectional converter device is as follows: the bidirectional converter configures M IGBT power modules according to the power peak value, and a temperature measuring device on the IGBT power modules sends the received information to a temperature receiving unit and converts the information into an analog quantity T igbt1 ～T igbtM Then the sample is sent to a detection unit; if the temperature data T of the IGBT power module igbt1 Temperature mean T with IGBT power module igbt-avg Is greater than a predetermined T igbt-max Judging that the IGBT power module is abnormal or the load of the bidirectional converter is unbalanced; simultaneously, the detection unit receives the temperature data T of the IGBT power module igbt1 ～T igbtM Synchronously recording corresponding time points, and fitting a corresponding temperature rise curve according to different power modules; then calculating the temperature change rate S of the IGBT power module igbt1 ～S igbtM And is matched with a preset S igbt-max Comparing if a module has S igbt ≥S igbt-max The abnormal temperature rise rate of the module is indicated, the abnormal heat dissipation of the IGBT power module is represented, corresponding alarm information is sent out, and otherwise, the temperature rise rate is in a normal range;
as shown in fig. 5, the specific flow of obtaining the fault early warning result of the filter screen and the fan of the urban rail bidirectional converter device is as follows: the wind speed transducer at the wind inlet collects wind speed information and converts the wind speed information into analog WS in Then, uploading the data to a detection unit; the current measuring device of the fan at the outlet is used for measuring the running current I of the fan fan Uploading to a detection unit in real time, and enabling a speed measuring device for measuring the rotating speed of the fan blade to rotate the rotating speed S of the blade fan Uploading to a detection unit; the detection unit converts the fan running current into corresponding blade rotating speed S fan-I Wind speed WS at corresponding rotational speed out-I The method comprises the steps of carrying out a first treatment on the surface of the The detection unit converts the rotating speed of the fan blade into the corresponding wind speed WS out-S The method comprises the steps of carrying out a first treatment on the surface of the If the vane rotating speed S converted by fan current exists fan- With the rotation speed S of the blade fan Is greater than a preset S fan-max The problems that the fan can have faults, ageing, serious dust accumulation on the blades and the like are described, the fan fault early warning is sent out, and otherwise, the fan working condition is described as normal; if WS out-S With WS in Is greater than a preset S in-max The filter screen output by the air inlet is possibly blocked and early warning of filter screen blocking is sent out;
as shown in fig. 6, a specific flow of obtaining the early warning result of the high-temperature operation of the urban rail bidirectional converter device is as follows: the temperature measuring device of the air outlet obtains related data T out1 Then, uploading the data to a temperature receiving device and then to a detection unit; upper partThe temperature of the air outlet of the bidirectional converter device for collecting each substation by the stage platform is T out1 ～T outN The method comprises the steps of carrying out a first treatment on the surface of the Blade rotation speed S is measured by a motor at an air outlet of the bidirectional converter fan And the detection unit calculates the corresponding wind speed WS out-S The method comprises the steps of carrying out a first treatment on the surface of the When the upper platform judges that the urban rail line is in the operation period, the air outlet temperature T of a certain bidirectional converter device out1 The temperature average value T of the air outlets of all the bidirectional converters of the circuit out-avg The difference of (2) exceeds a preset T out-max And WS (WS) out-S When the bidirectional converter is at the highest speed, the overall operation temperature of the bidirectional converter is higher, and corresponding early warning is sent out; if WS out-S If the fan is not in the highest position and early warning in the fourth thread does not occur, judging that the fan control system is abnormal, and failing to adjust the fan operation according to the corresponding working condition of the bidirectional converter device, and sending out fault early warning of the fan control system;
as shown in fig. 7, a specific flow for obtaining an abnormal early warning result of the supporting capacitor assembly and the auxiliary air duct of the urban rail bidirectional converter device is as follows: the wind speed transducer at the auxiliary air duct converts the real-time wind speed information in the auxiliary air duct into an analog quantity WS C1 Uploading to a detection unit; the temperature measuring device of the supporting capacitor assembly in the auxiliary air duct sends related data to the temperature receiving unit, and the related data are converted into analog quantity T C1 Uploading to a detection unit in real time; the upper stage platform collects temperature data T of bidirectional converter devices of different power substations C1 ～T CN And wind speed data WS C1 ～WS CN The method comprises the steps of carrying out a first treatment on the surface of the If a certain bidirectional converter is in a normal working state, the wind speed WS in the auxiliary air duct C1 Below a preset minimum wind speed WS C-min If the problems of filter screen blockage, fan fault and the like in the fourth thread do not occur, the auxiliary air duct is indicated to have a certain abnormality and corresponding early warning is sent out; if the auxiliary air duct is not abnormal, the temperature T of a supporting capacitor assembly of a certain bidirectional converter device C1 Temperature mean T of supporting capacitor assembly C-avg The difference is greater than a preset maximum value T C-max Judging that the heat dissipation of the support capacitor assembly of the bidirectional converter device is abnormal and giving out corresponding early warning;
when the six threads and other conditions occur, the upper platform displays immediate early warning information and possibly cause explanation of temperature abnormality on the display screen and sends the information back to the data detection unit; the early warning content of the temperature anomaly early warning system in this embodiment includes: the method comprises the following steps of device internal environment alarming, device external environment alarming, IGBT power module heat dissipation abnormality early warning, IGBT power module load unbalance early warning, filter screen blockage early warning, IGBT power module abnormal temperature rise early warning, fan abnormal aging early warning, fan control system abnormal early warning, bidirectional converter device long-time large load early warning, auxiliary air duct abnormal early warning and support capacitor assembly heat dissipation abnormal early warning;
the method can monitor the bidirectional converter device in real time on line, analyze various possible anomalies in the heat radiation system according to the temperature and wind speed information, report the anomaly information to a display and an upper platform, and inform relevant maintainers before the bidirectional converter device really breaks down, thereby avoiding the risk of explosion of the IGBT power module caused by abnormal heat radiation, ensuring the safety and stability of equipment, reducing the difficulty of operation and maintenance management and improving the data processing efficiency.
The same or similar reference numerals correspond to the same or similar components;
the terms describing the positional relationship in the drawings are merely illustrative, and are not to be construed as limiting the present patent;
it is to be understood that the above examples of the present invention are provided by way of illustration only and not by way of limitation of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (10)
1. An unusual early warning system of urban rail bidirectional converter heat dissipation, urban rail bidirectional converter includes: the heat dissipation module comprises M IGBT power modules, support capacitor assemblies arranged on the back sides of all the IGBT power modules and heat dissipation modules used for dissipating heat of all the IGBT power modules and the support capacitor assemblies, wherein the heat dissipation modules comprise the following components in sequence: air intake, wind channel, fan and air outlet, the wind channel is including the main air duct that sets up side by side and assisting the wind channel, and all IGBT power module all set up inside the main air duct, and the supporting capacitor subassembly sets up inside assisting the wind channel, and M is positive integer, its characterized in that, the unusual early warning system of temperature is including connecting gradually: the system comprises a data acquisition unit, a detection unit and a fault early warning unit;
The data acquisition unit is used for acquiring data of the heat dissipation module of the urban rail bidirectional converter in real time and sending the data to the detection unit for processing;
the detection unit is used for processing the data sent by the data acquisition unit, acquiring a heat dissipation early warning result according to the processing result, and sending the heat dissipation early warning result to the fault early warning unit for early warning, so that abnormal heat dissipation early warning is completed;
the data acquisition unit comprises a plurality of data acquisition units which are connected with the detection unit: the device comprises an air inlet outside temperature measuring device, an air inlet inside temperature measuring device, M IGBT power module temperature measuring devices, a supporting capacitor assembly temperature measuring device, an air outlet temperature measuring device, an air inlet wind speed transmitter, an auxiliary air channel wind speed transmitter, a fan current measuring device and a fan rotating speed measuring device.
2. The heat dissipation abnormality early warning system of the urban rail bidirectional converter according to claim 1, wherein the data acquisition unit is further provided with a first temperature receiving unit, a second temperature receiving unit, a third temperature receiving unit, a fourth temperature receiving unit and a fifth temperature receiving unit;
the temperature measuring device at the outer side of the air inlet is connected with the detecting unit through a first temperature receiving unit, the temperature measuring device at the inner side of the air inlet is connected with the detecting unit through a second temperature receiving unit, the temperature measuring device of each IGBT power module is connected with the detecting unit through a third temperature receiving unit, the temperature measuring device of the supporting capacitor assembly is connected with the detecting unit through a fourth temperature receiving unit, and the temperature measuring device of the air outlet is connected with the detecting unit through a fifth temperature receiving unit.
3. The heat dissipation abnormality early warning system of the urban rail bidirectional converter according to claim 1 or 2, wherein a filter screen is further arranged in a heat dissipation module of the urban rail bidirectional converter, and the filter screen is arranged between the air inlet and the air duct;
the fault early warning unit includes: the system comprises a communication module, a display screen and an upper platform;
the detection unit is connected with the fault early warning unit in a wireless or wired mode through the communication module, and the output end of the communication module is connected with the display screen and the upper platform respectively.
4. A control method of a heat dissipation abnormality early warning system of a bidirectional converter device of a city rail based on the heat dissipation abnormality early warning system of the bidirectional converter device of a city rail described in any one of claims 1-3, characterized in that the data acquisition unit acquires data of a heat dissipation module of the bidirectional converter device of a city rail in real time and sends the data to the detection unit for processing;
the detection unit processes the data sent by the data acquisition unit, obtains a heat dissipation early warning result according to the processing result, and sends the heat dissipation early warning result to the fault early warning unit for early warning, so that abnormal heat dissipation early warning is completed;
the detection unit performs the following processing:
processing according to temperature data obtained by the air inlet outside temperature measuring device and the air inlet inside temperature measuring device, and obtaining a heat dissipation abnormality early warning result of the internal environment of the urban rail bidirectional converter;
Processing according to temperature data obtained by the temperature measuring device at the outer side of the air inlet, and obtaining a heat dissipation abnormality early warning result of the external environment of the urban rail bidirectional converter;
processing according to temperature data obtained by all IGBT power module temperature measuring devices, and obtaining heat dissipation abnormality early warning results of the IGBT power modules of the urban rail bidirectional converter;
processing according to data obtained by the air inlet wind speed transducer, the fan current measuring device and the fan rotating speed measuring device, and obtaining fault early warning results of a filter screen of the urban rail bidirectional converter and the fan;
processing according to data obtained by the air outlet temperature measuring device and the fan rotating speed measuring device, and obtaining an early warning result of high-temperature operation of the urban rail bidirectional converter;
and processing according to the data obtained by the supporting capacitor assembly temperature measuring device and the auxiliary air duct wind speed transducer, and obtaining an abnormal early warning result of the supporting capacitor assembly and the auxiliary air duct of the urban rail bidirectional converter.
5. The method for controlling the urban rail bidirectional converter heat dissipation abnormality early warning system according to claim 4, wherein the method is characterized in that the heat dissipation abnormality early warning result of the internal environment of the urban rail bidirectional converter is obtained by the following steps:
S1.1: the air inlet outside temperature measuring device and the air inlet inside temperature measuring device respectively measure the temperature T outside the air inlet ai-out1 And the temperature T at the inner side of the air inlet ai-in1 And respectively sending the temperature signals to the detection unit through the first temperature receiving unit and the second temperature receiving unit;
s1.2: the detection unit calculates the temperature T outside the air inlet ai-out1 And the temperature T at the inner side of the air inlet ai-in1 And judging whether the absolute value of the first difference is greater than or equal to a preset first threshold T ai-max If the temperature is higher than or equal to the preset temperature, the internal environment of the urban rail bidirectional converter is abnormal in heat dissipation, otherwise, the internal environment of the urban rail bidirectional converter is not abnormal.
6. The method for controlling the urban rail bidirectional converter heat dissipation abnormality early warning system according to claim 4, wherein the method is characterized in that the heat dissipation abnormality early warning result of the urban rail bidirectional converter external environment is obtained by the following steps:
s2.1: the temperature measuring device outside the air inlet measures the temperature T outside the air inlet ai-out1 And pass throughThe first temperature receiving unit sends the first temperature to the detecting unit;
s2.2: the detection unit calculates the temperature T outside the air inlet ai-out1 And preset average temperature T outside the air inlet ai-out-avg And judging whether the absolute value of the second difference is greater than or equal to a preset second threshold T ai-out-max If the temperature is higher than or equal to the preset temperature, the external environment of the urban rail bidirectional converter is abnormal in heat dissipation, otherwise, the external environment of the urban rail bidirectional converter is not abnormal.
7. The method for controlling the urban rail bidirectional converter heat dissipation abnormality early warning system according to claim 4, wherein the method is characterized in that the heat dissipation abnormality early warning result of the urban rail bidirectional converter IGBT power module is obtained by the following steps:
s3.1: m IGBT power module temperature measuring devices respectively measure temperatures T of corresponding IGBT power modules igbt1 ～T igbtM And respectively sending the temperature signals to the detection unit through the third temperature receiving unit;
s3.2: the detection unit is used for detecting the temperature T of the M IGBT power modules igbt1 ～T igbtM Calculating temperature mean value T of IGBT power module igbt-avg And a temperature change rate S of each IGBT power module igbt1 ～S igbtM ；
S3.3: the following steps are simultaneously executed:
respectively calculating a third difference value of the temperature of each IGBT power module and the temperature average value of the IGBT power modules, and respectively judging whether the absolute value of the third difference value is greater than or equal to a preset third threshold value T igbt-max ；
The temperature change rate S of each IGBT power module is respectively igbt1 ～S igbtM And a preset fourth threshold S igbt-max Comparing;
if the absolute value of the third difference value corresponding to one IGBT power module is greater than or equal to a third threshold value T igbt-max Or a temperature change rate of a certain IGBT power module is larger than or equal to a fourth threshold S igbt-max Then the urban rail bidirectional converter deviceThe IGBT power module has abnormal heat dissipation; otherwise, the IGBT power module in the urban rail bidirectional converter device has no abnormal heat dissipation.
8. The method for controlling the urban rail bidirectional converter heat dissipation abnormality early warning system according to claim 4, wherein the method is characterized in that the method comprises the following steps of:
s4.1: the wind speed transmitter of the air inlet, the fan current measuring device and the fan rotating speed measuring device respectively measure the wind speed WS of the air inlet in Current I during fan operation fan And the actual rotation speed S of the fan blade fan And sending to a detection unit;
s4.2: the detection unit is used for detecting the current I when the fan operates fan Calculating theoretical blade rotating speed S when fan operates fan-I The method comprises the steps of carrying out a first treatment on the surface of the The detection unit is used for detecting the actual rotation speed S of the fan blade fan Acquiring actual wind speed WS when a fan operates out-S ；
S4.3: the detection unit calculates the theoretical blade rotating speed S when the fan operates fan-I And actual rotation speed S fan And judging whether the absolute value of the fourth difference is greater than or equal to a preset fifth threshold S fan-max If the wind power generation speed is greater than or equal to the preset speed, the fan of the urban rail bidirectional converter fails, otherwise, the fan of the urban rail bidirectional converter does not fail;
s4.4: the detection unit calculates the actual wind speed WS when the fan operates out-S And wind speed WS of air inlet in And judging whether the absolute value of the fifth difference is greater than or equal to a preset sixth threshold S in-max If the filter screen of the urban rail bidirectional converter is more than or equal to the filter screen, the filter screen of the urban rail bidirectional converter fails, otherwise, the filter screen of the urban rail bidirectional converter does not fail.
9. The method for controlling the urban rail bidirectional converter heat dissipation abnormality early warning system according to claim 4 or 8, wherein the early warning result of the urban rail bidirectional converter running at high temperature is obtained by the following steps:
s5.1: the air outlet temperature measuring device and the fan rotating speed measuring device respectively measure the temperature T of the air outlet out1 And the actual rotation speed S of the fan blade fan And sending to a detection unit;
s5.2: the detection unit is used for detecting the actual rotation speed S of the fan blade fan Acquiring actual wind speed WS when a fan operates out-S ；
S5.3: the detection unit calculates the temperature T of the air outlet out1 And a preset average temperature T of an air outlet out-avg And judging whether the absolute value of the sixth difference is greater than or equal to a preset seventh threshold T out-max If the wind speed is greater than or equal to the actual wind speed WS, judging the actual wind speed WS when the fan operates out-S Whether or not to be equal to the maximum wind speed WS preset by the fan out-max If the two-way converter is equal to the first value, the urban rail two-way converter is in an abnormal state of high-temperature operation; if the two-way converter is not equal to the two-way converter, the fan of the two-way converter has faults;
if the absolute value of the sixth difference value is smaller than the preset seventh threshold T out-max And the urban rail bidirectional converter is not abnormal.
10. The method for controlling the urban rail bidirectional converter heat dissipation abnormality early warning system according to claim 9, wherein the method is characterized in that the method comprises the following steps of:
s6.1: the temperature measuring device of the supporting capacitor component measures the temperature T of the supporting capacitor component C1 And sent to the detection unit through the fourth temperature receiving unit; the wind speed transmitter of the auxiliary wind channel measures the wind speed WS in the auxiliary wind channel C1 And sending to a detection unit;
s6.2: the detection unit calculates the temperature T of the supporting capacitor assembly C1 And a preset average temperature T of the supporting capacitor assembly C-avg And judging whether the absolute value of the seventh difference is greater than or equal to a preset eighth threshold T C-max If the temperature is greater than or equal to the temperature, the heat dissipation abnormality exists in the supporting capacitor component of the urban rail bidirectional converter deviceThe method comprises the steps of carrying out a first treatment on the surface of the Otherwise, the support capacitor component of the urban rail bidirectional converter has no abnormal heat dissipation;
s6.3: the detection unit judges the wind speed WS in the auxiliary air duct C1 Whether the air speed is smaller than or equal to a preset minimum air speed WS of the auxiliary air duct C-min If the air quantity is smaller than or equal to the air quantity, the auxiliary air channel is abnormal; otherwise, the auxiliary air duct is not abnormal.
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| CN117892095B (en) * | 2024-03-14 | 2024-05-28 | 山东泰开电力电子有限公司 | Intelligent detection method for faults of heat dissipation system for energy storage system |
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