JP5264622B2 - Power conversion device and train deterioration detection system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a power conversion apparatus and a train deterioration detecting system, capable of detecting deterioration based on an actual situation, even with regard to parts in which there is dispersion in life determining elements. <P>SOLUTION: The power conversion apparatus 1, which is connected to a network in a train and used for controlling the propulsion of the train, includes a memory 9 which stores parts data 22 inside its own power conversion apparatus 1 and parts data 15-19 inside other power conversion apparatus, a processing unit 20 which performs predetermined processing for the parts data 15-19, and a comparison unit 23 which compares a processing result 21 output by the processing unit with the parts data 22 and outputs a deterioration detection signal 30 that indicates that the parts built in the own power conversion apparatus 1 are more deteriorating than the parts built in the other power conversion apparatus. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

The present invention relates to detection of deterioration of components used in a power conversion device used for propulsion control of a railway vehicle or the like.

The conventional power converter sets the expected design life time calculated from desk studies and past results in advance, compares the operation time of the equipment with the preset expected life time of the parts, and outputs a maintenance inspection signal. ing.

  The expected design life of a part depends on the environmental conditions in which the device is used, such as ambient temperature, humidity, and variations in the characteristics of the part itself. Therefore, the environmental condition is set as an environmental factor, and the expected design life time calculated from the desk study and the past results is corrected by the environmental factor. Then, the corrected expected life time of the component is compared with the operation time of the apparatus, and the comparison result is output as a maintenance inspection signal.

  The power converter shown in the following Patent Document 1 is provided with a component deterioration detection circuit, and the component deterioration detection circuit applies an expected life setting value of each used component, voltage application to each used component, or operating time of the power converter. Is compared with the time integration corresponding to, and the preliminary information of the parts replacement cycle and the excess information of the parts replacement cycle are output.

  The expected life setting described above is configured to be corrected according to an environmental condition signal input from the outside. For example, when the expected life of a certain part of the power converter is 50,000 hours based on past operation results, reliability test data, etc., the expected life setting is set to 50,000 hours, Compare. If the advance information set value is set to 5,000 hours, about 7 months before the accumulated time reaches the expected life time, this is detected by the comparator, and the advance information on the part replacement cycle is output. Notify the necessity of parts replacement.

  In addition, for a component whose expected life varies depending on the temperature condition, for example, a component such as a capacitor, the corrector uses the environmental condition signal input from the external input terminal to set the expected life setting value according to the environmental condition signal. to correct. For this reason, it is possible to obtain a more accurate deterioration detection signal for parts that are affected by environmental conditions.

  As described above, the related art shown in Patent Document 1 below can set the expected life for each used component from the past use record of the power conversion device and the environmental conditions, and mainly for the component having a finite life. Judgment is performed, and the output display corresponding to the deterioration detection signal is displayed on the power converter itself, thereby realizing simplified maintenance and effective preventive maintenance.

JP 05-056629 A

  However, the conventional technique disclosed in Patent Document 1 compares the past performance or reliability test data with the actual operation time as the component deterioration detection means as described above. There is a problem that a part having a potential defective element may deteriorate faster than the time set in the past results.

  In addition, when the expected life is set for the deterioration time of a part with a potential defective element, the expected life set value for most other parts does not match the substance and depends on the usage environment of the device, etc. There was a problem that it was difficult to take into account variations in the life-determining factors, such as variations in the components-specific lifespan, handling by the driver, operating temperature / humidity, installation state of the device on the vehicle body, etc. .

  The present invention has been made in view of the above, and it is an object of the present invention to obtain a power conversion device and a train deterioration detection system that can realize deterioration detection according to the substance even for parts having variations in life determining elements. And

  In order to solve the above-described problems and achieve the object, the present invention is connected to a network in a train and is used for propulsion control of the train, and is incorporated in its own power conversion device. 1st part data which is dynamic data of parts, and 2nd part data which were dynamic data of parts built in other power converters, and were transmitted from the other power converters via the network, respectively And a storage unit for storing, an arithmetic processing unit for performing a predetermined arithmetic process on the second component data, a data output from the arithmetic processing unit and the first component data, And a comparison unit that outputs a deterioration detection signal indicating that a component built in the power conversion device is deteriorated as compared with a component built in the other power conversion device.

  According to the present invention, a plurality of power conversion devices are connected via a network, and electrical, mechanical, and image data (hereinafter simply referred to as “component data”) related to each other component is shared via the network, A predetermined calculation process of each component data is performed in the power converter, and a deterioration detection signal is output according to a comparison result between the calculated component data and the component data in the own device. Even in the case of parts having variations, there is an effect that it is possible to realize deterioration detection in line with the substance.

FIG. 1 is a diagram illustrating the configuration of the power conversion device according to the first embodiment of the present invention. 2 shows the NO. It is a figure which shows the internal structure of 1 power converter device. FIG. 3 is a diagram illustrating an internal configuration of the power conversion apparatus according to the second embodiment of the present invention. FIG. 4 is a diagram illustrating an internal configuration of a power conversion device including a comparison unit that is different from the comparison unit illustrated in FIG. 3. FIG. 5 is a diagram illustrating a configuration of a train deterioration detection system according to the third embodiment of the present invention. FIG. 6 is a diagram illustrating an internal configuration of the vehicle information management device.

  Hereinafter, embodiments of a power conversion device and a train deterioration detection system according to the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

Embodiment 1 FIG.
FIG. 1 is a diagram illustrating a configuration of power converters 1 to 6 according to the first embodiment of the present invention. A plurality of power conversion devices 1 to 6 shown in FIG. 1 are network central devices (hereinafter referred to as a network 8) such as a LAN 8 disposed between vehicles and a hub function of the network 8 so as to share data with each other. 7) (referred to simply as “central device”). Note that the network 8 is a means of data transmission and is not limited to a wired system.

  Each power converter 1-6 is mutually connected via the network 8, and has memory | storage parts 9-14, such as memory, inside each power converter 1-6. Moreover, since the data in these memory | storage parts 9-14 are mutually shared between each power converter device 1-6 via the network 8, each power converter device 1-6 starts about another power converter device. Data can be referenced. For example, the number 1 of power conversion devices can refer to data in other power conversion devices 2 to 6.

  Next, the operation will be described. When each power converter 1-6 operates, component data stored in each storage unit 9-14, for example, operating current, operating voltage, etc. is transmitted via the network 8, and is sent to each power converter 1-6. To be recorded. Hereinafter, as shown in FIG. The operation of the power converter 1 will be described as an example.

  2 shows the NO. It is a figure which shows the internal structure of 1 power converter device 1. FIG. The power conversion device 1 shown in FIG. 2 includes a storage unit 9, an arithmetic processing unit 20, and a comparison unit 23 as main components.

  In the storage unit 9, component data (hereinafter simply referred to as “first component data”) 22 in its own power converter 1 and component data (hereinafter simply “second”) in the other power converters 2 to 6 are stored. 15-19) are stored. In addition, the power converters 2-6 shown by FIG. 1 shall have the structure similar to the power converter 1. FIG.

  Each component data mentioned above indicates, for example, electrical dynamic data such as voltage value and current value, mechanical dynamic data such as reaction time, and image data such as appearance (image).

  Examples of the electrical dynamic data include the voltage / current data of capacitors that can be acquired by the current sensors and voltage sensors built in the power converters 1 to 6, and the input to the semiconductor elements by switching operations of the semiconductor elements. Refers to output voltage and current data. As mechanical dynamic data, the data of the components which have a mechanism part built in each power converter 1-6, for example, contact operation time etc. of a contactor etc. are pointed out.

  As image data, the contact surface of the circuit breaker incorporated in each power converter devices 1-6, the appearance of a capacitor, etc. are pointed out, for example. As for the contact surface of the circuit breaker, if the contact surface becomes rough, it may cause a decrease in the breaking performance and inability to break (contact agitation). Regarding the appearance of the capacitor, depending on the deterioration mode, a deterioration tendency appears as the expansion of the individual.

  Based on these phenomena, each of the power conversion devices 1 to 6 according to the present embodiment outputs a deterioration detection signal 30 by calculation / comparison processing of each component data. The specific operation will be described below.

  The power conversion device 1 is connected to the network 8, and the storage unit 9 takes in the second component data 15 to 19 transmitted from the power conversion devices 2 to 6 through the network 8. The arithmetic processing unit 20 performs arithmetic processing on the second component data 15 to 19 fetched in the storage unit 9.

  Examples of the predetermined arithmetic processing in the arithmetic processing unit 20 include average value calculation, effective value calculation, image processing, operation time calculation, and the like. The operation time refers to capacitor charge / discharge time, switch contact time, and the like.

  The average value calculation will be described as an example. For example, the arithmetic processing unit 20 averages the second component data 15 to 19 at a predetermined sampling period as preprocessing, and averages each second component data 15 to 15. An average value of 19 is calculated and output as a calculation processing result 21.

  As described above, the arithmetic processing unit 20 performs the arithmetic operation using the plurality of second component data 15 to 19, and therefore outputs a highly reliable arithmetic processing result 21 in accordance with the operation status of the power conversion devices 2 to 6. Is possible. The arithmetic processing described above is an example, and the present invention is not limited to these.

  The comparison unit 23 compares the calculation processing result 21 that is data output from the calculation processing unit 20 with the first component data 22, and detects the deterioration of the component when the comparison result exceeds a predetermined value. It outputs as a deterioration detection signal 30 indicating that a component built in its own power conversion device is deteriorated as compared with a component built in another power conversion device. Note that the predetermined value described above is a value that allows detection of deterioration before the function of the component disappears in consideration of the type of component or the installation environment of the component.

  In addition, each power converter device 1-6 outputs the degradation detection signal 30 for every kind of data, such as the above-mentioned electrical dynamic data and mechanical dynamic data, or for every kind of components, such as a capacitor | condenser and a circuit breaker. You may comprise.

  In addition, when performing deterioration detection using image data, the arithmetic processing unit 20 acquires image data of the same part after a predetermined time elapses in advance, and the comparison unit 23 acquires image data before and after the elapse of the predetermined time. Are subjected to image processing, and the deterioration detection signal 30 is output when the state of the component after a predetermined time elapses exceeds a predetermined value or a predetermined state.

  In the prior art, degradation was detected by comparing the expected life time (initial value) calculated from desk studies and results with the operating time of the device, but in the power conversion devices 1 to 6 according to the present embodiment, For example, it is greatly different in that deterioration is detected by sharing and comparing data of a plurality of devices installed in a place where the environment is similar. Therefore, in the power conversion devices 1 to 6 according to the present embodiment, when a sudden deterioration of a component due to manufacturing variations occurs in a component mounted on a specific device, the initial value described above is not necessary. By comparing with a normal component mounted on another device, it is possible to detect the sudden deterioration of the component. Therefore, according to the power conversion devices 1 to 6 according to the present embodiment, since it is possible to detect in advance the sudden deterioration of parts that may hinder the operation of the railway vehicle, it is possible to realize smooth operation of the railway vehicle. It is.

  As described above, the power conversion devices 1 to 6 according to the present embodiment are connected to the network 8, share the component data in each of the power conversion devices 1 to 6, and the second component data 15 to 19. Since the first component data 22 is collated with the calculation processing result 21 obtained based on the above, it is possible to detect deterioration more in accordance with the substance as compared with the prior art. Specifically, the following effects can be considered. From the torque current ripple obtained by the arithmetic processing described above, it is possible to detect an abnormal operation of a drive device such as a main circuit semiconductor element (IGBT or the like) or a gear device of its own power conversion device 1. Further, it is possible to detect an operation abnormality of the main circuit semiconductor element and an abnormality of the cooler from the temperature of the cooler for the main circuit semiconductor element obtained by the arithmetic processing described above. In addition, the circuit breaker operating time obtained by the above-described arithmetic processing for the operation time of the circuit breaker that operates when the protection circuit of each power converter 1 to 6 operates or when each power converter 1 to 6 is opened from the system. Therefore, the abnormality of the circuit breaker of the own power conversion device 1 can be detected. Moreover, about the main circuit capacitor of each power converter device 1-6, the capacity loss abnormality of the main circuit capacitor of its own power converter device 1 can be detected from the capacitor charging time and the discharge time obtained by the above arithmetic processing. .

Embodiment 2. FIG.
In the first embodiment, the second component data 15 to 19 obtained via the network 8 is arithmetically processed and compared with the first component data 22 to detect the deterioration of the component. The embodiment is different in that normal characteristic data (hereinafter simply referred to as “standard data”) 24 of normal parts of deterioration detection target parts is used. Hereinafter, the same parts as those of the first embodiment are denoted by the same reference numerals, description thereof is omitted, and only different parts are described.

  FIG. 3 is a diagram illustrating an internal configuration of the power conversion devices 1 to 6 according to the second embodiment of the present invention, and FIG. 4 is a diagram illustrating a power provided with a comparison unit that is different from the comparison unit illustrated in FIG. It is a figure which shows the internal structure of a converter.

  In FIG. 3, the comparison unit 80 includes a comparison unit 25 and a comparison unit 23. Standard data 24 is stored in the storage unit 9 in advance, and the comparison unit 25 compares the calculation processing result 21 and the first component data 22 described above. When it is determined that the first component data 22 is deteriorated as compared with the calculation processing result 21, the comparison unit 23 compares the first component data 22 that is the comparison result 31 with the standard data 24.

  The comparison unit 23 outputs a deterioration detection signal 30 when it is determined that the first component data 22 is degraded as compared with the standard data 24, but the first component data 22 is compared with the standard data 24. If it is determined that the deterioration has not occurred, the deterioration detection signal 30 is not output.

  That is, the comparison unit 80 shown in FIG. 3 has a deterioration detection signal even when a component built in its own power conversion device is deteriorated more than a component built in another power conversion device. It is possible to determine that the situation of outputting 30 has not been reached.

  As described above, according to the power conversion device shown in FIG. 3, the standard data 24 is used as a final determination element for determining the degree of deterioration of the first component data 22, and therefore, compared with the first embodiment. It is possible to further improve the accuracy of deterioration detection. As a result, for example, even when the first component data 22 is deteriorated from the calculation processing result 21, the comparison unit 80 determines that it is not necessary to immediately replace the component built in its own power converter. Is possible.

  In FIG. 4, the comparison unit 80 includes the comparison unit 26 and the comparison unit 23 as described above, and the standard data 24 is stored in the storage unit 9 in advance. The comparison unit 26 compares the standard data 24 with the first component data 22. When it is determined that the first component data 22 is degraded as compared with the standard data 24, the comparison unit 26 compares the first component data 22 that is the comparison result 32 with the calculation processing result 21.

  The comparison unit 23 outputs the deterioration detection signal 30 when it is determined that the first component data 22 is deteriorated compared to the calculation processing result 21, but the first component data 22 is output to the calculation processing result 21. When it is determined that the deterioration has not occurred, the deterioration detection signal 30 is not output.

  That is, the comparison unit 80 shown in FIG. 4 outputs a deterioration detection signal 30 when a component built in its own power converter is deteriorated from the standard data 24, although the component has a tendency to deteriorate. It is possible to determine that the situation has not been reached. As described above, according to the power conversion device shown in FIG. 4, the deterioration detection accuracy can be further improved as compared with the first embodiment.

  As described above, the power conversion devices 1 to 6 according to the present embodiment store the standard characteristic data 24 at the normal time of the deterioration detection target component in the storage unit 9 in advance, and the arithmetic processing result 21, the first Since the deterioration detection signal 30 is output based on the one component data 22 and the standard data 24, it is possible to improve the deterioration detection accuracy as compared with the first embodiment.

  In the first and second embodiments, the case where the power converters 1 to 6 are connected to one central device 7 having a network hub function has been described as an example. However, the present invention is not limited to this. Absent. For example, when the central device 7 shown in FIG. 1 is connected to another central device via a network (not shown), the embodiment is also applied to the power conversion device connected to the other central device. 1 and 2 can be applied.

Embodiment 3 FIG.
In the first embodiment, the power conversion devices 1 to 6 are configured to share the partial data with each other and detect the deterioration of the components. However, in this embodiment, the vehicle information management connected to the network 8 is performed. The difference is that the device 40 collects partial data of each of the power conversion devices 1 to 6 and detects deterioration of the components. Hereinafter, the same parts as those in the first and second embodiments are denoted by the same reference numerals, description thereof is omitted, and only different parts are described.

  FIG. 5 is a diagram illustrating a configuration of a train deterioration detection system 50 according to the third embodiment of the present invention, and FIG. 6 is a diagram illustrating an internal configuration of the vehicle information management device. In FIG. 5, the train deterioration detection system 50 includes the network 8, the vehicle information management device 40, and the power conversion devices 1 to 6 described above.

  In FIG. 6, the vehicle information management device 40 collects and manages, for example, status information, route section information, diagram information, and the like of various devices provided in the vehicle. The vehicle information management device 40 includes a storage unit 60 and a calculation unit 70 as main components, and the calculation unit 70 includes a calculation processing unit 71 and a comparison unit 72.

  The storage unit 60 includes first component data 22 transmitted from the power conversion device 1 that is one power conversion device, and second component data transmitted from the power conversion devices 2 to 6 that are other power conversion devices. 15 to 19 are stored. The storage unit 60 can store standard data 24 as in the first and second embodiments. The arithmetic processing unit 71 corresponds to the arithmetic processing unit 20 shown in the first and second embodiments, and the comparison unit 72 corresponds to the comparison unit 23 or the comparing unit 80 shown in the first and second embodiments.

  The vehicle information management device 40 configured as described above performs the same arithmetic processing as the power conversion devices of the first and second embodiments, and outputs the deterioration detection signal 30. FIG. 5 shows only one vehicle information management device 40. For example, the vehicle information management device 40 is mounted on a plurality of vehicles, and a predetermined transmission path laid between the vehicles is used. The parts data may be shared between the vehicle information management devices 40 by connecting them.

  As described above, in the train deterioration detection system 50 according to the present embodiment, the vehicle information management device 40 connected to the network 8 collects component data of each power conversion device 1 to 6 and performs arithmetic processing. Thus, the internal configuration of each of the power conversion devices 1 to 6 is simplified, and the component data calculation process can be performed efficiently.

  In the first to third embodiments, it is possible to detect component deterioration not by absolute comparison but by relative comparison, and it is possible to take into account variations and deviations related to lifetime determination. Moreover, although Embodiment 1-3 demonstrated the quantity of the power converter device as 6 units | sets, it is not limited to 6 units | sets. In the first to third embodiments, a plurality of data is used as the second component data. However, the second component data is not limited to a plurality of data. If at least one second component data is used, the first data It is possible to detect the deterioration of the component data 22.

  As described above, the power conversion device and the train deterioration detection system according to the present invention are applicable to the power conversion device and the train deterioration detection system for detecting the deterioration of components used in the power conversion device, This is useful as an invention capable of detecting deterioration in line with the substance even when sudden deterioration occurs due to variations in the life determining factors.

1 Power converter (own power converter, one power converter)
2, 3, 4, 5, 6 Power converter (other power converters)
7 Network central device 8 Network 9, 10, 11, 12, 13, 14, 60 Storage unit 15, 16, 17, 18, 19 Component data in other power conversion device (second component data)
20, 71 arithmetic processing unit 21 arithmetic processing result (data output by arithmetic processing unit)
22 Parts data in own power converter (first parts data)
23, 25, 26, 72 comparison unit 24 standard characteristic data 30 deterioration detection signal 31, 32 comparison result 40 vehicle information management device 50 train deterioration detection system 70 calculation unit

Claims (8)

In the power converter connected to the network in the train and used for propulsion control of the train,
First component data, which is dynamic data of components built in its own power conversion device, and dynamic data of components built in other power conversion devices from the other power conversion devices via the network A storage unit for storing the transmitted second component data;
An arithmetic processing unit that performs predetermined arithmetic processing on the second component data;
The data output by the arithmetic processing unit is compared with the first component data, and a component built in the power converter is deteriorated compared with a component built in the other power converter. A comparison unit that outputs a deterioration detection signal indicating that
A power conversion device comprising: The storage unit
Store standard characteristic data of the normal state of the parts built in the power converter of the self,
The comparison unit includes:
The power conversion device according to claim 1, wherein the deterioration detection signal is output based on data output from the arithmetic processing unit, the first component data, and the standard characteristic data. The first part data and the second part data are:
3. The electrical kinetic data of the part, the mechanical kinetic data of the part, and imaging data obtained by imaging the appearance of the part. The power converter device described in 1. The arithmetic processing unit includes:
The power converter according to any one of claims 1 to 3, wherein the second component data is averaged at a predetermined sampling period as preprocessing of the arithmetic processing. A power conversion device used for train propulsion control, a vehicle information management device for managing component data transmitted from each power conversion device, which is dynamic data of components built in each power conversion device, and In a train deterioration detection system, which is applied to a train having
The vehicle information management device includes:
Dynamic data of components built in one power converter, the first component data transmitted from the one power converter, and dynamic data of components built in another power converter, A storage unit that stores second component data transmitted from one power conversion device;
An arithmetic processing unit that performs predetermined arithmetic processing on the second component data;
The data output from the arithmetic processing unit is compared with the first component data, and the component built in the one power converter is degraded as compared with the component built in the other power converter. A comparison unit that outputs a deterioration detection signal indicating that
A train deterioration detection system characterized by comprising: The storage unit
Store normal characteristic data of the parts at normal times,
The comparison unit includes:
The train deterioration detection system according to claim 5, wherein the deterioration detection signal is output based on data output from the arithmetic processing unit, the first component data, and the standard characteristic data. . The first part data and the second part data are:
The electrical dynamic data of the part, the mechanical dynamic data of the part, or imaging data obtained by imaging the appearance of the part. The train deterioration detection system described in 1. The arithmetic processing unit includes:
The train deterioration detection according to any one of claims 5 to 7, wherein the second component data is averaged at a predetermined sampling period and output as the calculation processing result as preprocessing of the calculation processing. system.

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