CN115561565B - High-voltage frequency converter monitoring device and method based on network communication - Google Patents
High-voltage frequency converter monitoring device and method based on network communication Download PDFInfo
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Abstract
The invention relates to the technical field of data processing, in particular to a high-voltage frequency converter monitoring device and method based on network communication, wherein the device comprises the following components: the acquisition module is used for acquiring historical fault data of the high-voltage frequency converter; the analysis module is used for carrying out data analysis on the acquired fault data of the high-voltage frequency converter and comprises a classification unit, a calculation unit, an adjustment unit, a correction unit and a correction unit; and the comparison module is used for comparing the target fault frequency with a preset heavy fault frequency and determining whether to trigger alarm information according to a comparison result. According to the invention, the service state of the high-voltage frequency converter is determined by carrying out data analysis on the fault data of the high-voltage frequency converter, and the fault monitoring precision of the high-voltage frequency converter is improved.
Description
Technical Field
The invention relates to the technical field of data processing, in particular to a high-voltage frequency converter monitoring device and method based on network communication.
Background
A Variable-frequency Drive (VFD) is a power control device that applies frequency conversion technology and microelectronic technology to control an ac motor by changing the frequency of a working power supply of the motor. The frequency converter mainly comprises a rectifying unit (converting alternating current into direct current), a filtering unit, an inverting unit (converting direct current into alternating current), a braking unit, a driving unit, a detecting unit micro-processing unit and the like. The frequency converter adjusts the voltage and frequency of an output power supply by switching on and off of an internal IGBT, provides the required power supply voltage according to the actual requirement of the motor, and further achieves the purposes of energy saving and speed regulation. With the continuous improvement of the industrial automation degree, the frequency converter is also widely applied.
Chinese patent publication No.: CN106885965B discloses a device and method for fault detection of a frequency converter, the device comprising: the first acquisition module is used for acquiring the voltage drop of the high-side current divider; the second acquisition module is used for acquiring the voltage drop of the low-side current divider; and the comparison module is used for outputting an indication signal for indicating the short circuit of the frequency converter when the acquired voltage drop of the high-side current divider is not equal to the acquired voltage drop of the low-side current divider. The device and the method can detect the fault of the frequency converter. However, there are the following problems: if the frequency converter frequently breaks down, the scheme cannot monitor the use state of the frequency converter, and the problem of low fault monitoring precision exists.
Disclosure of Invention
Therefore, the invention provides a high-voltage frequency converter monitoring device and method based on network communication, which are used for solving the problems that the fault frequency of a frequency converter cannot be monitored and the fault monitoring precision is low in the prior art.
In order to achieve the above object, in one aspect, the present invention provides a high-voltage inverter monitoring device based on network communication, including an obtaining module, configured to obtain historical fault data of a high-voltage inverter, where the historical fault data includes the number of times of heavy faults, the time period of occurrence of the heavy faults, the number of times of occurrence of the same type of heavy faults, and the repair duration of the heavy faults;
the analysis module is used for carrying out data analysis on the acquired fault data of the high-voltage frequency converter and comprises a classification unit, a calculation unit, an adjustment unit, a correction unit and a correction unit, wherein the classification unit is used for classifying the fault data of the high-voltage frequency converter according to preset fault data of the high-voltage frequency converter so as to determine whether the fault type of the high-voltage frequency converter is a double fault;
the calculating unit is used for calculating the frequency P of the heavy fault according to the ratio of the times of the heavy fault to the times of the heavy fault of the preset high-voltage frequency converter after the fault type is determined to be the heavy fault;
the adjusting unit is used for selecting an adjusting coefficient to adjust the frequency P of the heavy fault according to the relation between the time period T of the heavy fault and the preset time period T0, wherein the time period T is acquired from the historical fault data;
the correction unit is used for selecting a correction coefficient according to the times of the same type of heavy faults and a plurality of times of preset same type of heavy faults acquired from the historical fault data to correct the adjusted frequency P' of the heavy faults;
the correction unit is used for selecting a correction coefficient according to the relation between the repair time length of the heavy fault obtained from the historical fault data and a preset repair time length to correct the corrected frequency P '' of the heavy fault so as to obtain the target fault frequency of the high-voltage frequency converter;
and the comparison module is used for comparing the target fault frequency with a preset heavy fault frequency P0 and determining whether to trigger alarm information according to a comparison result.
Further, the comparison module comprises an evaluation unit, a judgment unit and an alarm unit;
the evaluation unit is used for evaluating the use state of the high-voltage frequency converter according to the corrected frequency of the heavy fault;
the judging unit is used for judging whether the high-voltage frequency converter needs to be replaced or not according to the evaluation result;
and the alarm unit is used for triggering alarm information when the replacement is needed according to the judgment result.
Further, when classifying the fault data of the high-voltage frequency converter, the classification unit matches the acquired fault data of the high-voltage frequency converter with the preset fault data of the high-voltage frequency converter, and divides the fault data of the high-voltage frequency converter into a heavy fault and a light fault according to the matching result.
Further, when calculating the frequency P of the heavy fault, the calculating unit sets P = N/N0, where N is the number of times of the historical heavy fault of the high-voltage frequency converter, and N0 is the preset number of times of the heavy fault of the high-voltage frequency converter.
Further, when the adjusting unit adjusts the frequency P of the heavy fault, the time period T of the occurrence of the heavy fault is obtained, and is compared with a preset time period T0, and the frequency P of the heavy fault is adjusted according to the comparison result, wherein when T is less than T0, the adjusting unit selects an adjusting coefficient a to adjust the frequency P of the heavy fault to increase the frequency P of the heavy fault, and sets 1 < a < 1.3, sets the adjusted frequency of the heavy fault as P ', and sets P' = P × a; when T is larger than or equal to T0, the adjusting unit does not adjust.
Further, when the correction unit corrects the adjusted frequency P 'of the heavy faults, the number C of the heavy faults of the same type is obtained, the obtained number C is compared with the number of the heavy faults of the preset same type, and the adjusted frequency P' of the heavy faults is corrected according to the comparison result, wherein when the C is less than or equal to C1, the correction unit does not perform correction; when C1 is larger than C and smaller than C2, the correcting unit selects a first correction coefficient b1 to correct the adjusted heavy fault frequency P 'so as to increase the adjusted heavy fault frequency P', and b1 is larger than 1 and smaller than 1.1;
when C is larger than or equal to C2, the correcting unit selects a second correction coefficient b2 to correct the adjusted heavy fault frequency P 'so as to increase the adjusted heavy fault frequency P', and b2= b1+ (C-C2)/C is set; when an ith correction coefficient bi is selected to correct the adjusted frequency P 'of the heavy fault, setting the frequency of the corrected heavy fault to be P' ', and setting P' '= P' × bi.
Further, when the correction unit corrects the corrected heavy fault frequency P ″, acquiring a repair duration L of the heavy fault, comparing the repair duration L with a preset repair duration L0, and correcting the corrected heavy fault frequency P ″ according to a comparison result, wherein when L is less than or equal to L0, the correction unit does not correct; when L > L0, the correction unit selects a correction coefficient j to correct the frequency P '' of the corrected heavy fault, so as to increase the frequency P '' of the corrected heavy fault, set 1 < j < 1.2, set the frequency of the corrected heavy fault as P '' ', and set P' '' = P '' × j.
Further, when evaluating the use state of the high-voltage frequency converter, the evaluation unit acquires the frequency P ' ' ' of the corrected heavy fault, compares the frequency P ' ' ' with the preset frequency P0 of the heavy fault, and judges the use state of the high-voltage frequency converter according to the comparison result, wherein when P ' ' ' < P0, the evaluation unit judges that the high-voltage frequency converter is normally used; when P ' ' ' > P0, the evaluation unit judges that the high-voltage frequency converter is risky to use.
Further, the judging unit acquires an evaluation judgment result when judging whether the high-voltage frequency converter needs to be replaced, and judges whether the high-voltage frequency converter needs to be replaced according to the evaluation judgment result, wherein when the evaluation judgment result indicates that the high-voltage frequency converter is normally used, the judging unit judges that the high-voltage frequency converter does not need to be replaced; when the evaluation judgment result indicates that the high-voltage frequency converter is in danger of being used, the judgment unit judges that the high-voltage frequency converter needs to be replaced.
On the other hand, the invention provides a high-voltage frequency converter monitoring method based on network communication, which comprises the following steps of S1, acquiring historical fault data of the high-voltage frequency converter;
s2, carrying out data analysis on the acquired fault data of the high-voltage frequency converter, classifying the fault data of the high-voltage frequency converter through a classification unit according to preset fault data of the high-voltage frequency converter to determine whether the fault type of the high-voltage frequency converter is a heavy fault, calculating the frequency P of the heavy fault according to the number of times of the heavy fault after the fault type is determined to be the heavy fault through a calculation unit, adjusting the frequency P of the heavy fault according to the time period T of the occurrence of the heavy fault acquired from historical fault data through an adjustment unit after the calculation is finished, correcting the frequency P ' of the adjusted heavy fault according to the number of times of the occurrence of the same type of heavy fault acquired from the historical fault data through a correction unit after the adjustment is finished, and correcting the frequency P ' ' of the corrected heavy fault according to the repair duration of the heavy fault acquired from the historical fault data through a correction unit to acquire the target fault frequency of the high-voltage frequency converter;
and S3, comparing the target fault frequency with a preset heavy fault frequency P0, and determining whether to trigger alarm information according to a comparison result.
Compared with the prior art, the method has the advantages that historical fault data of the high-voltage frequency converter are obtained through the obtaining module, the obtained fault data of the high-voltage frequency converter are subjected to data analysis through the analyzing module to obtain the target fault frequency of the high-voltage frequency converter, the target fault frequency is compared with the preset heavy fault frequency through the comparing module to determine the using state of the high-voltage frequency converter, and whether alarm information is triggered or not is determined according to the comparison result. Therefore, the using state of the high-voltage frequency converter is accurately monitored and analyzed, and whether the high-voltage frequency converter needs to be replaced or not is judged.
Especially, the use state of the high-voltage inverter is evaluated by the evaluation unit according to the corrected frequency of the catastrophic failure, so that the precision of evaluating the use state of the high-voltage inverter can be improved. And judging whether the high-voltage frequency converter needs to be replaced or not through the judging unit according to the evaluation result, and triggering alarm information when the high-voltage frequency converter needs to be replaced according to the judgment result through the alarm unit so as to inform a user of the replacement information to realize monitoring.
In particular, the high-voltage frequency converter fault data are classified to determine the heavy fault, so that the precision of the high-voltage frequency converter fault data is improved.
Particularly, the frequency of the heavy fault is calculated according to the ratio of the historical times of the heavy fault of the high-voltage frequency converter to the preset times of the heavy fault of the high-voltage frequency converter, so that the frequency of the heavy fault is calculated more accurately.
Particularly, the frequency of the heavy fault is adjusted through the adjusting unit, the time period of the occurrence of the heavy fault is compared with the preset time period, and if the time period of the occurrence of the heavy fault is smaller than the preset time period, the adjusting unit selects an adjusting coefficient to adjust the frequency of the heavy fault so as to increase the frequency of the heavy fault, and therefore the precision of the frequency of the heavy fault can be guaranteed.
Particularly, the correction unit corrects the adjusted frequency of the heavy faults to improve the precision of the frequency of the heavy faults, the times of the same type of heavy faults are obtained and are compared with the times of the preset same type of heavy faults, different correction modes are selected according to the size relation between the times of the same type of heavy faults and the preset times, the correction precision is guaranteed, and different correction coefficients are selected to enable the correction to be more precise, so that the precision of the frequency of the heavy faults is guaranteed.
Particularly, the corrected heavy fault frequency is corrected through the correction unit, the repair time length of the heavy fault is obtained and is compared with the preset repair time length, and if the repair time length of the heavy fault is longer than the preset repair time length, the correction coefficient is selected to correct the corrected heavy fault frequency, so that the corrected heavy fault frequency is increased, and the accuracy of the heavy fault frequency is improved.
In particular, the use state of the high-voltage frequency converter is evaluated by the evaluation unit, the corrected frequency of the heavy fault is obtained and compared with the preset frequency of the heavy fault to determine the use state of the high-voltage frequency converter.
Particularly, whether the high-voltage frequency converter needs to be replaced is judged through the judging unit, an evaluation judging result is obtained, whether the high-voltage frequency converter needs to be replaced is judged according to the evaluation judging result, and if the evaluation judging result is that the high-voltage frequency converter is normally used, the judging unit judges that the high-voltage frequency converter does not need to be replaced; and if the evaluation judgment result indicates that the high-voltage frequency converter is in danger in use, the judgment unit judges that the high-voltage frequency converter needs to be replaced. To determine whether the high voltage inverter needs to be replaced.
Drawings
Fig. 1 is a schematic structural diagram of a high-voltage inverter monitoring device based on network communication according to an embodiment of the present invention;
fig. 2 is another schematic structural diagram of a high-voltage inverter monitoring device based on network communication according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a third structure of a high-voltage inverter monitoring device based on network communication according to an embodiment of the present invention;
fig. 4 is a flowchart of a high-voltage inverter monitoring method based on network communication in an embodiment of the present invention.
Detailed Description
In order that the objects and advantages of the invention will be more clearly understood, the invention is further described below with reference to examples; it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and do not limit the scope of the present invention.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Fig. 1 to fig. 3 show schematic structural diagrams of a high-voltage inverter monitoring device based on network communication according to the present invention, which include an obtaining module 10, configured to obtain historical fault data of a high-voltage inverter, where the historical fault data includes the number of heavy faults, the time period of the heavy faults, the number of times of the heavy faults of the same type, and the repair duration of the heavy faults;
the analysis module 20 is used for performing data analysis on the acquired fault data of the high-voltage frequency converter, and comprises a classification unit 21, a calculation unit 22, an adjustment unit 23, a correction unit 24 and a correction unit 25, wherein the classification unit 21 is used for classifying the fault data of the high-voltage frequency converter according to preset fault data of the high-voltage frequency converter so as to determine whether the fault type of the high-voltage frequency converter is a heavy fault;
the calculating unit 22 is configured to calculate a frequency P of the heavy fault according to a ratio of the number of times of the heavy fault to a preset number of times of the heavy fault of the high-voltage frequency converter after determining that the fault type is the heavy fault;
the adjusting unit 23 is configured to select an adjusting coefficient to adjust the frequency P of the heavy fault according to a relationship between the time period T of the heavy fault occurring obtained from the historical fault data and a preset time period T0;
the correcting unit 24 is configured to select a correction coefficient according to the number of times of occurrence of the same type of heavy fault and a plurality of preset numbers of times of occurrence of the same type of heavy fault, which are acquired from the historical fault data, to correct the adjusted frequency P' of the heavy fault;
the correction unit 25 is configured to select a correction coefficient according to a relationship between a repair duration of the heavy fault obtained from the historical fault data and a preset repair duration to correct the corrected frequency P ″ of the heavy fault, so as to obtain a target fault frequency of the high-voltage frequency converter;
the comparing module 30 is configured to compare the target failure frequency with a preset frequency P0 of a heavy failure, and determine whether to trigger an alarm message according to a comparison result.
Specifically, the embodiment of the invention acquires the historical fault data of the high-voltage frequency converter in a network communication mode. The analysis module 20 is connected with the acquisition module 10, the comparison module 30 is connected with the analysis module 20, the calculation unit 22 is connected with the classification unit 21, the adjustment unit 23 is connected with the calculation unit 22, the correction unit 24 is connected with the adjustment unit 23, and the correction unit 25 is connected with the correction unit 24.
Particularly, sorting unit 21 matches the high-voltage inverter fault data that will acquire with presetting high-voltage inverter fault data when classifying high-voltage inverter fault data, and will according to the matching result high-voltage inverter fault data divide into heavy trouble and light trouble.
Specifically, the classification unit is provided with a fault list in advance, fault names corresponding to heavy faults and light faults exist in the fault list, and the classification unit can perform keyword matching according to the fault names in the acquired fault data of the high-voltage frequency converter and the fault names in the preset fault list during classification and perform classification according to the matching degree.
Specifically, the historical fault data of the high-voltage frequency converter is acquired through the acquisition module, the acquired fault data of the high-voltage frequency converter is subjected to data analysis through the analysis module to acquire the target fault frequency of the high-voltage frequency converter, the target fault frequency is compared with the preset heavy fault frequency through the comparison module to determine the use state of the high-voltage frequency converter, and whether alarm information is triggered or not is determined according to the comparison result. Therefore, the use state of the high-voltage frequency converter is accurately monitored and analyzed, and whether the high-voltage frequency converter needs to be replaced or not is judged.
Specifically, the comparing module 30 includes an evaluating unit 31, a judging unit 32 and an alarming unit 33;
an evaluation unit 31 for evaluating the use state of the high-voltage frequency converter according to the corrected frequency of the heavy fault;
a judging unit 32 for judging whether the high voltage inverter needs to be replaced according to the evaluation result;
and the alarm unit 33 is used for triggering alarm information when the replacement is needed according to the judgment result.
Specifically, in the embodiment of the present invention, the determining unit 32 is connected to the evaluating unit 31, and the warning unit 33 is connected to the determining unit 32.
Specifically, according to the embodiment of the invention, the evaluation unit evaluates the use state of the high-voltage frequency converter according to the corrected frequency of the heavy fault, so that the precision of evaluating the use state of the high-voltage frequency converter can be improved. And judging whether the high-voltage frequency converter needs to be replaced or not through the judging unit according to the evaluation result, and triggering alarm information when the high-voltage frequency converter needs to be replaced according to the judgment result through the alarm unit so as to inform a user of the replacement information to realize monitoring.
Specifically, when classifying the high-voltage inverter fault data, the classification unit 21 matches the acquired high-voltage inverter fault data with the preset high-voltage inverter fault data, and divides the high-voltage inverter fault data into a heavy fault and a light fault according to the matching result.
Specifically, the embodiment of the invention classifies the fault data of the high-voltage frequency converter to determine the heavy fault, so as to improve the precision of the fault data of the high-voltage frequency converter.
Specifically, when calculating the frequency P of the heavy fault, the calculating unit 22 sets P = N/N0, where N is the number of historical heavy faults of the high-voltage inverter, and N0 is the number of preset heavy faults of the high-voltage inverter.
Specifically, according to the embodiment of the invention, the frequency of the heavy fault is calculated by the ratio of the historical times of the heavy fault of the high-voltage frequency converter to the preset times of the heavy fault of the high-voltage frequency converter, so that the frequency of the heavy fault is calculated more accurately.
Specifically, when the adjusting unit 23 adjusts the frequency P of the heavy fault, the time period T of the occurrence of the heavy fault is obtained, and is compared with the preset time period T0, and the frequency P of the heavy fault is adjusted according to the comparison result, wherein when T is less than T0, the adjusting unit selects an adjusting coefficient a to adjust the frequency P of the heavy fault to increase the frequency P of the heavy fault, and sets 1 < a < 1.3, sets the adjusted frequency of the heavy fault as P ', and sets P' = P × a; when T is larger than or equal to T0, the adjusting unit does not adjust.
Specifically, in the embodiment of the present invention, the time period of occurrence of the heavy fault is small, which indicates that the heavy fault occurs frequently.
Specifically, in the embodiment of the invention, the frequency of the heavy fault is adjusted by the adjusting unit, the time period of the occurrence of the heavy fault is compared with the preset time period, and if the time period of the occurrence of the heavy fault is less than the preset time period, the adjusting unit selects the adjusting coefficient to adjust the frequency of the heavy fault so as to increase the frequency of the heavy fault, so that the precision of the frequency of the heavy fault can be ensured.
Specifically, when the adjusted frequency P 'of the heavy fault is corrected, the correcting unit 24 obtains the frequency C of the same type of heavy fault, compares the frequency C with the preset frequency of the same type of heavy fault, and corrects the adjusted frequency P' of the heavy fault according to the comparison result, wherein when C is less than or equal to C1, the correcting unit does not perform correction;
when C1 is larger than C and smaller than C2, the correcting unit selects a first correction coefficient b1 to correct the adjusted heavy fault frequency P 'so as to increase the adjusted heavy fault frequency P', and b1 is larger than 1 and smaller than 1.1; when C is larger than or equal to C2, the correcting unit selects a second correction coefficient b2 to correct the adjusted heavy fault frequency P 'so as to increase the adjusted heavy fault frequency P', and b2= b1+ (C-C2)/C is set; when an ith correction coefficient bi is selected to correct the adjusted frequency P 'of the heavy fault, setting the frequency of the corrected heavy fault to be P' ', and setting P' '= P' × bi.
Specifically, the same type of heavy fault in the embodiment of the present invention may be understood as a heavy fault with the same fault name, for example: and if the main control board fails, the failure name is the main control board failure, and the main control board is the failure type.
Specifically, the embodiment of the invention corrects the adjusted frequency of the heavy fault through the correction unit to improve the precision of the frequency of the heavy fault, obtains the times of the same type of heavy fault, compares the times with the times of the preset same type of heavy fault, selects different correction modes according to the magnitude relation between the times of the same type of heavy fault and the preset times, ensures the correction precision, and selects different correction coefficients to ensure that the correction is more precise, thereby ensuring the precision of the frequency of the heavy fault.
Specifically, when correcting the corrected heavy fault frequency P ″, the correcting unit 25 obtains the repair duration L of the heavy fault, compares the repair duration L with the preset repair duration L0, and corrects the corrected heavy fault frequency P ″ according to the comparison result, wherein when L is less than or equal to L0, the correcting unit does not correct the heavy fault frequency P ″; when L > L0, the correction unit selects a correction coefficient j to correct the frequency P '' of the corrected heavy fault, so as to increase the frequency P '' of the corrected heavy fault, set 1 < j < 1.2, set the frequency of the corrected heavy fault as P '' ', and set P' '' = P '' × j.
Specifically, the longer the repair time of the heavy fault in the embodiment of the present invention is, the more serious the fault is.
Specifically, in the embodiment of the present invention, the corrected heavy fault frequency is corrected by the correction unit, the repair time length of the heavy fault is obtained and compared with the preset repair time length, and if the repair time length of the heavy fault is longer than the preset repair time length, the correction coefficient is selected to correct the corrected heavy fault frequency, so as to increase the corrected heavy fault frequency and improve the accuracy of the heavy fault frequency.
Specifically, when evaluating the use state of the high-voltage frequency converter, the evaluation unit 31 obtains the frequency of the corrected heavy fault as P '″, compares the frequency with the preset frequency of the heavy fault P0, and determines the use state of the high-voltage frequency converter according to the comparison result, wherein when P' ″ < P0, the evaluation unit determines that the high-voltage frequency converter is normally used; when P ' ' ' > P0, the evaluation unit judges that the high-voltage frequency converter is risky to use.
Specifically, the embodiment of the invention evaluates the use state of the high-voltage frequency converter through the evaluation unit, acquires the corrected frequency of the heavy fault, and compares the frequency with the preset frequency of the heavy fault to determine the use state of the high-voltage frequency converter.
Specifically, the determination unit 32 obtains an evaluation determination result when determining whether the high-voltage inverter needs to be replaced, and determines whether to replace the high-voltage inverter according to the evaluation determination result, wherein,
when the evaluation judgment result is that the high-voltage frequency converter is normally used, the judgment unit judges that the high-voltage frequency converter does not need to be replaced; when the evaluation judgment result indicates that the high-voltage frequency converter is in danger of being used, the judgment unit judges that the high-voltage frequency converter needs to be replaced.
Specifically, the embodiment of the invention judges whether the high-voltage frequency converter needs to be replaced or not through the judging unit, acquires an evaluation judgment result, judges whether the high-voltage frequency converter needs to be replaced or not according to the evaluation judgment result, and judges that the high-voltage frequency converter does not need to be replaced if the evaluation judgment result indicates that the high-voltage frequency converter is normally used; and if the evaluation judgment result indicates that the high-voltage frequency converter is in danger in use, the judgment unit judges that the high-voltage frequency converter needs to be replaced. To determine whether the high voltage inverter needs to be replaced.
Please refer to fig. 4, which is a schematic flow chart of a high-voltage inverter monitoring method based on network communication according to an embodiment of the present invention, the method includes step s1, obtaining historical fault data of the high-voltage inverter;
s2, carrying out data analysis on the acquired fault data of the high-voltage frequency converter, classifying the fault data of the high-voltage frequency converter through a classification unit according to preset fault data of the high-voltage frequency converter to determine whether the fault type of the high-voltage frequency converter is a heavy fault, calculating the frequency P of the heavy fault according to the number of times of the heavy fault after the fault type is determined to be the heavy fault through a calculation unit, adjusting the frequency P of the heavy fault according to the time period T of the occurrence of the heavy fault acquired from historical fault data through an adjustment unit after the calculation is finished, correcting the frequency P ' of the adjusted heavy fault according to the number of times of the occurrence of the same type of heavy fault acquired from the historical fault data through a correction unit after the adjustment is finished, and correcting the frequency P ' ' of the corrected heavy fault according to the repair duration of the heavy fault acquired from the historical fault data through a correction unit to acquire the target fault frequency of the high-voltage frequency converter;
and S3, comparing the target fault frequency with a preset heavy fault frequency P0, and determining whether to trigger alarm information according to a comparison result.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is apparent to those skilled in the art that the scope of the present invention is not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (7)
1. A high-voltage frequency converter monitoring device based on network communication is characterized by comprising,
the acquisition module is used for acquiring historical fault data of the high-voltage frequency converter, wherein the historical fault data comprises the times of heavy faults, the time period of the occurrence of the heavy faults, the times of the occurrence of the same type of heavy faults and the repair duration of the heavy faults;
the analysis module is used for carrying out data analysis on the acquired fault data of the high-voltage frequency converter and comprises a classification unit, a calculation unit, an adjustment unit, a correction unit and a correction unit;
the classification unit is used for classifying the fault data of the high-voltage frequency converter according to the preset fault data of the high-voltage frequency converter so as to determine whether the fault type of the high-voltage frequency converter is a heavy fault;
the calculating unit is used for calculating the frequency P of the heavy fault according to the ratio of the times of the heavy fault to the times of the heavy fault of the preset high-voltage frequency converter after the fault type is determined to be the heavy fault;
the adjusting unit is used for selecting an adjusting coefficient to adjust the frequency P of the heavy fault according to the relation between the time period T of the heavy fault and the preset time period T0, wherein the time period T is acquired from the historical fault data;
the correction unit is used for selecting a correction coefficient according to the times of the same type of heavy faults and a plurality of times of preset same type of heavy faults acquired from the historical fault data to correct the adjusted frequency P' of the heavy faults;
the correction unit is used for selecting a correction coefficient according to the relation between the repair time length of the heavy fault obtained from the historical fault data and a preset repair time length to correct the corrected frequency P '' of the heavy fault so as to obtain the target fault frequency of the high-voltage frequency converter;
the comparison module is used for comparing the target fault frequency with a preset heavy fault frequency P0 and determining whether to trigger alarm information according to a comparison result;
the adjusting unit acquires the time period T of the occurrence of the heavy fault when adjusting the frequency P of the heavy fault, compares the time period T with a preset time period T0, and adjusts the frequency P of the heavy fault according to the comparison result, wherein,
when T is less than T0, the adjusting unit selects an adjusting coefficient a to adjust the frequency P of the heavy fault so as to increase the frequency P of the heavy fault, sets 1 < a < 1.3, sets the frequency of the adjusted heavy fault as P ', and sets P' = Pxa;
when T is more than or equal to T0, the adjusting unit does not adjust;
when the correcting unit corrects the adjusted frequency P 'of the heavy faults, the times C of the same type of heavy faults are obtained and are compared with the times of the preset same type of heavy faults, and the adjusted frequency P' of the heavy faults is corrected according to the comparison result,
when C is less than or equal to C1, the correcting unit does not perform correction;
when C1 is larger than C and smaller than C2, the correcting unit selects a first correction coefficient b1 to correct the adjusted heavy fault frequency P 'so as to increase the adjusted heavy fault frequency P', and b1 is larger than 1 and smaller than 1.1;
when C is larger than or equal to C2, the correcting unit selects a second correction coefficient b2 to correct the adjusted heavy fault frequency P 'so as to increase the adjusted heavy fault frequency P', and b2= b1+ (C-C2)/C is set;
when an ith correction coefficient bi is selected to correct the adjusted frequency P 'of the heavy fault, setting the frequency of the corrected heavy fault to be P' 'and setting P' '= P' × bi;
the correction unit acquires the repair duration L of the heavy fault when correcting the corrected frequency P '' of the heavy fault, compares the repair duration L with a preset repair duration L0, and corrects the corrected frequency P '' of the heavy fault according to the comparison result, wherein,
when L is less than or equal to L0, the correction unit does not perform correction;
when L > L0, the correction unit selects a correction coefficient j to correct the frequency P '' of the corrected heavy fault, so as to increase the frequency P '' of the corrected heavy fault, set 1 < j < 1.2, set the frequency of the corrected heavy fault as P '' ', and set P' '' = P '' × j.
2. The high-voltage inverter monitoring device based on network communication of claim 1, wherein the comparing module comprises an evaluating unit, a judging unit and an alarming unit;
the evaluation unit is used for evaluating the use state of the high-voltage frequency converter according to the corrected frequency of the heavy fault;
the judging unit is used for judging whether the high-voltage frequency converter needs to be replaced or not according to the evaluation result;
and the alarm unit is used for triggering alarm information when the replacement is needed according to the judgment result.
3. The high-voltage inverter monitoring device based on network communication of claim 2, wherein the classification unit matches the acquired high-voltage inverter fault data with preset high-voltage inverter fault data when classifying the high-voltage inverter fault data, and classifies the high-voltage inverter fault data into a heavy fault and a light fault according to a matching result.
4. The network communication-based high-voltage inverter monitoring device as claimed in claim 3, wherein the calculating unit sets P = N/N0 when calculating the frequency P of the heavy fault, where N is the number of historical heavy faults of the high-voltage inverter and N0 is the number of preset heavy faults of the high-voltage inverter.
5. The network communication-based high-voltage inverter monitoring device according to claim 1, wherein the evaluation unit, when evaluating the use state of the high-voltage inverter, acquires the corrected heavy fault frequency P ' ' ', compares it with a preset heavy fault frequency P0, and determines the use state of the high-voltage inverter according to the comparison result, wherein,
when P ' ' ' < P0, the evaluation unit judges that the high-voltage frequency converter is normally used;
when P ' ' ' > P0, the evaluation unit judges that the high-voltage frequency converter is risky to use.
6. The high-voltage inverter monitoring device based on network communication according to claim 5, wherein the judging unit obtains an evaluation determination result when determining whether the high-voltage inverter needs to be replaced, and determines whether to replace the high-voltage inverter according to the evaluation determination result, wherein,
when the evaluation judgment result is that the high-voltage frequency converter is normally used, the judgment unit judges that the high-voltage frequency converter does not need to be replaced;
when the evaluation judgment result indicates that the high-voltage frequency converter is in danger of being used, the judgment unit judges that the high-voltage frequency converter needs to be replaced.
7. A high-voltage frequency converter monitoring method based on network communication, which is suitable for the high-voltage frequency converter monitoring device based on network communication in any one of claims 1 to 6, and is characterized by comprising,
s1, acquiring historical fault data of a high-voltage frequency converter;
s2, carrying out data analysis on the acquired fault data of the high-voltage frequency converter, classifying the fault data of the high-voltage frequency converter through a classification unit according to preset fault data of the high-voltage frequency converter to determine whether the fault type of the high-voltage frequency converter is a heavy fault, calculating the frequency P of the heavy fault according to the number of times of the heavy fault after the fault type is determined to be the heavy fault through a calculation unit, adjusting the frequency P of the heavy fault according to the time period T of the occurrence of the heavy fault acquired from historical fault data through an adjustment unit after the calculation is finished, correcting the frequency P ' of the adjusted heavy fault according to the number of times of the occurrence of the same type of heavy fault acquired from the historical fault data through a correction unit after the adjustment is finished, and correcting the frequency P ' ' of the corrected heavy fault according to the repair duration of the heavy fault acquired from the historical fault data through a correction unit to acquire the target fault frequency of the high-voltage frequency converter;
and S3, comparing the target fault frequency with a preset heavy fault frequency P0, and determining whether to trigger alarm information according to a comparison result.
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