JP2020102938A - Abnormality detection apparatus, abnormality detection method, and vehicle for electric railway - Google Patents

Abstract

To provide an abnormality detection apparatus and an abnormality detection method for early detecting an insulation abnormality of high voltage equipment mounted on a vehicle for an electric railway, for example, to provide an abnormality detection apparatus for detecting an insulation abnormality of high voltage equipment mounted on a vehicle for an electric railway during operation of the vehicle for the electric railway.SOLUTION: An abnormality detection apparatus includes: a voltage conversion device for AD converting voltage flowing in high voltage equipment mounted on a vehicle for an electric railway; a waveform analysis device for analyzing an AD converted waveform signal; a position detection device for generating a position signal of a position of the vehicle for the electric railway; a storage device for storing a generation position of surge voltage generated in the vehicle of the electric railway; and an analysis device for specifying a position in which a pulse is generated on the basis of the waveform signal and the position signal, and analyzing whether the pulse is generated due to an insulation abnormality of the high voltage equipment on the basis of the specified position and the generation position of the surge voltage.SELECTED DRAWING: Figure 1

Description

The present invention relates to an abnormality detection device, an abnormality detection method, and an electric railway vehicle.

As a background art of this technical field, there is JP 2011-196819 A (Patent Document 1). In this patent document 1, a noise level maximum value detection unit obtains a noise level maximum value Vn in a noise level maximum value detection section Tn of differential absolute value data, and then a surge waveform peak point detection unit detects a surge waveform peak. The peak point P1 that is the first maximum point of the point detection section Tp is detected, and then the surge waveform arrival time calculation unit reverses from the point PV2, which is the start point of the surge waveform peak point detection section Tp, to the 400th point ( A point P2 that first falls below Vn in the direction of going back in time) is detected, and the zero-cross point P0 of the straight line connecting the peak point P1 and the point P2 is set as the rising point of the surge waveform by the surge waveform arrival time calculation unit, and noise is generated. Even if the level fluctuates or the rise of the surge waveform is gradual, by providing a more accurate estimation of the rise point of the surge waveform, we provide a fault point locating system that can locate the fault point easily and with high accuracy. It is described (see summary).

JP, 2011-196819, A

Patent Document 1 describes a fault point locating system that locates a fault point with high accuracy when a fault occurs in a transmission line installed on the ground in an electric railway.

However, the fault point locating system described in Patent Document 1 is for locating a fault occurring in a power transmission line installed on the ground, and is an abnormality that detects an insulation abnormality of a high-voltage device mounted on an electric railway vehicle. It is not related to the detection device.

Therefore, the present invention provides an abnormality detection device, an abnormality detection method, and an electric railway vehicle for early detecting an insulation abnormality of a high-voltage device mounted on the electric railway vehicle. For example, the present invention provides an abnormality detection device, an abnormality detection method, and an electric railway vehicle that detect an insulation abnormality of a high-voltage device mounted on the electric railway vehicle while the electric railway vehicle is in operation.

In order to solve the above problems, an abnormality detection device of the present invention includes a voltage conversion device that AD-converts a voltage flowing through a high-voltage device mounted on an electric railway vehicle, and a waveform analysis device that analyzes the AD-converted waveform signal. A position detection device that generates a position signal of the position of the electric railway vehicle, a storage device that stores the generation position of the surge voltage that occurs in the electric railway vehicle, and a pulse is generated based on the waveform signal and the position signal. An analysis device that identifies a position and analyzes whether or not a pulse is generated due to an insulation abnormality of a high-voltage device, based on the identified position and the position where the surge voltage is generated.

And the abnormality detection method of this invention WHEREIN: The voltage which flows into the high voltage equipment mounted in the electric railway vehicle is AD-converted by the voltage converter, the AD-converted waveform signal is analyzed by the waveform analyzer, and it is for electric railways. The position signal of the position of the vehicle is created by the position detection device, the generation position of the surge voltage generated in the electric railway vehicle is stored in the storage device, and the position where the pulse is generated is determined based on the waveform signal and the position signal. The analysis device analyzes whether or not the pulse is generated due to the insulation abnormality of the high-voltage equipment, based on the specified position and the position where the surge voltage is generated.

The electric railway vehicle of the present invention is equipped with the abnormality detection device of the present invention.

ADVANTAGE OF THE INVENTION According to this invention, the abnormality detection apparatus, the abnormality detection method, and the electric railway vehicle which detect the insulation abnormality of the high voltage equipment mounted in the electric railway vehicle at an early stage can be provided. For example, it is possible to provide an abnormality detection device, an abnormality detection method, and an electric railway vehicle that detect an insulation abnormality of a high-voltage device mounted on the electric railway vehicle while the electric railway vehicle is in operation.

The problems, configurations and effects other than those described above will be clarified by the following description of the embodiments.

FIG. 3 is an explanatory diagram illustrating an abnormality detection device that detects an insulation abnormality of a high-voltage device mounted on an electric railway vehicle according to a first embodiment. It is explanatory drawing explaining the typical waveform which the pulse and the noise were superimposed on AC voltage. It is explanatory drawing explaining the typical waveform which the pulse and the noise were superimposed on the DC voltage. It is explanatory drawing explaining the typical waveform which the pulse superimposed on the alternating voltage after removing noise. It is explanatory drawing explaining the typical waveform which the pulse superimposed on the DC voltage after removing noise. FIG. 7 is an explanatory diagram illustrating an abnormality detection device that detects an insulation abnormality of a high-voltage device mounted on an electric railway vehicle according to a second embodiment. It is explanatory drawing explaining the electric railway vehicle in Example 4.

Embodiments of the present invention will be described below with reference to the drawings. It should be noted that the same or similar configurations are denoted by the same reference numerals, and when the description overlaps, the description may be omitted.

FIG. 1 is an explanatory diagram illustrating an abnormality detection device that detects an insulation abnormality of a high-voltage device mounted on an electric railway vehicle according to a first embodiment.

In electric railways that require regular operation, high-voltage equipment mounted on electric railway vehicles must have sufficient reliability. This high-voltage device has been devised in various ways to ensure that the insulation performance does not deteriorate (insulation deterioration) due to surge voltage (voltage that instantaneously exceeds the steady state) flowing in from the current collector, ensuring reliability. doing.

The abnormality detection device and the abnormality detection method described in the present embodiment detect an insulation abnormality (insulation deterioration) of a high-voltage device mounted on an electric railroad vehicle, particularly during operation of the electric railroad vehicle, and improve reliability. Is further improved.

First, the electric circuit mounted on the electric railway vehicle includes a current collector 101, a circuit breaker 102, an AC/DC switch 103, a main transformer 104, a converter 105, an inverter 106, a main motor 107, an axle 108, and a measuring transformer 109. , And has a measuring resistor 111.

Although an electric circuit for both alternating current and direct current is described here, an electric circuit for exclusive use of alternating current or an electric circuit for exclusive use of direct current does not include an electric circuit for exclusive use of alternating current or an electric circuit for exclusive use of direct current shown in FIG. Either is omitted.

When traveling in the AC section, the AC/DC switch 103 is switched to the A side, and when traveling in the DC section, the AC/DC switch 103 is switched to the D side, and the main motor 107 is supplied with DC voltage and AC voltage, respectively. Supply.

To monitor the overhead line voltage, a voltage transformer 109 for AC and a voltage resistor 111 for DC are connected to the current collector 101.

The circuit breaker 102, the AC/DC switch 103, the main transformer 104, the instrument transformer 109, and the instrument resistor 111 are high-voltage devices and require reliability.

The abnormality detection device and the abnormality detection method described in the present embodiment can detect the insulation deterioration of such high-voltage equipment at an early stage, and the progress of the insulation deterioration of the high-voltage equipment impedes the operation of the electric railway vehicle. Can be prevented in advance.

In such a high-voltage device, a surge voltage flowing from the current collector 101 causes a voltage change in a pulse waveform (pulse waveform). On the other hand, even in a high-voltage device whose insulation has deteriorated, a voltage change having a pulse-like waveform (pulse waveform) occurs. This pulse waveform (hereinafter sometimes referred to as “pulse”) can be detected also in the instrument transformer 109 and the instrument resistor 110.

However, the pulse waveform generated by the surge voltage and the pulse waveform generated by the insulation deterioration have similar pulse waveforms.

For this reason, it is difficult to distinguish the pulse waveform due to the surge voltage and the pulse waveform due to the insulation deterioration. In particular, during operation of the electric railway vehicle, the pulse waveform due to the surge voltage and the pulse waveform due to the insulation deterioration can be distinguished from each other. It is difficult to detect insulation deterioration of voltage equipment.

Therefore, in the present embodiment, an abnormality detection device that distinguishes a pulse waveform due to a surge voltage from a pulse waveform due to insulation deterioration and detects insulation deterioration of high-voltage equipment is installed in an electric railway vehicle.

The abnormality detection device described in this embodiment includes a voltage conversion device 201, a waveform analysis device 202, an analysis device 203, an alarm device 204, a storage device 205, a position detection device 206, and a vehicle position sensor 207.

That is, the abnormality detection device described in the present embodiment has a voltage conversion device 201 for AD (analog-to-digital) conversion of the output voltage of the transformer 109 for meters or the output voltage of the resistor 111 for meters, and a waveform obtained by AD conversion. A waveform analysis device 202 that analyzes (waveform signal), a vehicle position sensor 207 that detects the position of an electric railway vehicle, and a position detection device 206 that processes the detected position into a signal (electronic) to create a position signal. And an analysis device 203 that analyzes based on the analyzed waveform signal, the created position signal, and the occurrence position of the surge voltage stored in advance, and outputs the analysis result.

Then, the storage device 205 stores the following information. That is, the waveform signal analyzed by the waveform analysis device 202, the position signal created by the position detection device 206, and the analysis result analyzed by the analysis device 203 are stored.

Further, the alarm device 204 outputs an alarm (analysis result) based on the analysis result (determination result (insulation deterioration) of the analysis device 203) analyzed by the analysis device 203. The alarm device 204 may output the analysis result in a timely manner, or may output the analysis result stored in the storage device 205 when the electric railway vehicle arrives at the base of the electric railway vehicle. Good.

It should be noted that some or all of these devices may be integrated, and when a device having an equivalent function is separately installed, the device can be used instead.

The voltage conversion device 201 AD-converts the output voltage of the transformer 109 for meters or the output voltage of the resistor 111 for meters.

FIG. 2 is an explanatory diagram illustrating a typical waveform in which a pulse and noise are superimposed on an AC voltage.

As shown in FIG. 2, a typical input waveform input to the voltage conversion device 201 is an AC voltage waveform in the case of an AC voltage.

In this, a pulse 301 and a noise 302 are superimposed on a basic AC waveform 300.

The pulse 301 includes a pulse generated due to insulation deterioration of high-voltage equipment, a current collector 101 caused by raising and lowering the current collector 101 at a base of an electric railway vehicle, or an arc caused by a potential difference in a feeder section. And the pulse generated by the surge voltage that flows in from the current collector 101.

Further, the noise 302 is noise generated by the converter 105 and the inverter 106 mounted on the electric railway vehicle.

FIG. 3 is an explanatory diagram illustrating a typical waveform in which a pulse and noise are superimposed on a DC voltage.

As shown in FIG. 3, a typical input waveform input to the voltage conversion device 201 is a DC voltage waveform in the case of a DC voltage.

In this, a pulse 301 and a noise 302 are superimposed on a basic DC waveform 300.

The pulse 301 includes a pulse generated due to insulation deterioration of high-voltage equipment, a current collector 101 caused by raising and lowering the current collector 101 at a base of an electric railway vehicle, or an arc caused by a potential difference in a feeder section. And the pulse generated by the surge voltage that flows in from the current collector 101.

Further, the noise 302 is noise generated by the converter 105 and the inverter 106 mounted on the electric railway vehicle.

The waveform analysis device 202 removes the noise 302 from the waveform signal AD-converted by the voltage conversion device 201. That is, the waveform analysis device 202 is a device that extracts only the waveform signal of the pulse 301 from which the noise 302 has been removed.

The waveform analysis device 202 removes the noise 302 by a preset algorithm by comparing with a waveform signal obtained from the converter 105 or the inverter 106, even if only the frequency of the noise 302 that is known in advance is removed using a filter. May be.

The frequency, noise waveform, algorithm, etc. necessary for removing the noise 302 may be stored in the storage device 205 in advance, and the data may be extracted by communication, transmitted to the waveform analysis device 202, and used for analysis.

FIG. 4 is an explanatory diagram illustrating a typical waveform in which a pulse is superimposed on an AC voltage after noise is removed.

As shown in FIG. 4, the waveform analyzer 202 shows an AC voltage waveform with the noise 302 removed.

In this, noise 302 is superimposed on the basic AC waveform 300.

The pulse 301 includes a pulse generated due to deterioration of insulation of high-voltage equipment, a current collector 101 that moves up and down the current collector 101 at the base of an electric railway vehicle, or a current that is collected by an arc due to a potential difference in a feeder section. The pulse generated by the surge voltage flowing from the device 101 is included.

The noise 302 generated by the converter 105 and the inverter 106 mounted on the electric railway vehicle has been removed.

FIG. 5: is explanatory drawing explaining the typical waveform which the pulse superimposed on the DC voltage after removing noise.

As shown in FIG. 5, the waveform analyzer 202 shows a DC voltage waveform from which the noise 302 has been removed.

In this, noise 302 is superimposed on the basic DC waveform 300.

The pulse 301 includes a pulse generated due to deterioration of insulation of high-voltage equipment, a current collector 101 that moves up and down the current collector 101 at the base of an electric railway vehicle, or a current that is collected by an arc due to a potential difference in a feeder section. The pulse generated by the surge voltage flowing from the device 101 is included.

The noise 302 generated by the converter 105 and the inverter 106 mounted on the electric railway vehicle has been removed.

The vehicle position sensor 207 receives a high-speed signal from a speedometer attached to the axle 108, a detection sensor for detecting a GPS (Global Positioning System) signal, an ATS (Automatic Train Stop) or a ground element in an ATC (Automatic Train Control) system. It is an on-board vehicle, a detection circuit for detecting a track circuit current, a receiving device for receiving a high frequency signal from a transponder, or the like.

The position detection device 206 detects the current position from latitude and longitude from the position input from the vehicle position sensor 207, or a distance from a reference point on the track (for example, the nearest station or the like), and the position. Create a signal. In order to detect the distance from a reference point on the track, necessary data is stored in the storage device 205 in advance, and the data is extracted by communication and transmitted to the position detection device 206 to obtain the position signal. May be created.

The analysis device 203 detects the waveform signal of the pulse 301 from which the noise 302 has been removed by the waveform analysis device 202 (FIG. 4 (AC) or FIG. 5 (DC)) and the current position information (position) generated by the position detection device 206. Signal) and the position information of the base of the electric railway vehicle and the position information of the feed section stored in the storage device 205 are compared.

That is, the storage device 205 stores the position information of the base of the electric railway vehicle and the position information of the feeder section. At such a position, a surge voltage flows from the current collector 101 due to the elevation of the current collector 101 or an arc or the like due to the potential difference in the feed section, and the pulse 301 is generated by this surge voltage. Therefore, the storage device 205 stores such a position in advance as a surge voltage generation position (pulse 301 generation position).

As described above, at the position of the base of the electric railway vehicle or the position of the feeder section, the pulse 301 is generated due to the surge voltage flowing from the current collector 101, so the position information of the base of the electric railway vehicle and the feeder Use the location information of the section as input information.

As described above, the pulse 301 includes the pulse generated by the insulation deterioration of the high-voltage equipment, the current collector 101 caused by the lifting and lowering of the current collector 101 at the base of the electric railway vehicle, or the potential difference in the feeder section. The pulse generated by the surge voltage that flows in from the current collector 101 due to an arc or the like is included.

The generation of the pulse 301 due to the insulation deterioration does not depend on the position. On the other hand, the generation of the pulse 301 due to the surge voltage depends on the position. That is, the pulse 301 due to the surge voltage is generated at the position of the base of the electric railway vehicle or the position of the feeder section.

Then, the position where the pulse 301 is generated is compared with the position stored in advance in the storage device 205 (the position of the base of the electric railway vehicle or the position of the feeder section), and if these two positions match, the insulation is performed. If it is determined that the pulse 301 is not generated due to deterioration and the positions of the two do not match, it can be determined that the pulse 301 is due to insulation deterioration.

That is, in the abnormality detection device and the abnormality detection method described in the present embodiment, the voltage converter 201 continuously inputs the input waveform, and the waveform analyzer 202 causes the waveform analyzer 202 to input the waveform shown in FIG. 4) (AC) or 5 (DC) from the input waveform shown in FIG. 4), a voltage waveform is created by removing the noise 302, and the analyzer 203 inputs the voltage waveform from the position detector 206. The position where the pulse 301 is generated is specified from the position of the vehicle, and the specified position (the position where the pulse 301 is generated) and the position previously stored in the storage device 205 (the position of the base of the electric railway vehicle) And position of the Denden section: input information), and compare. When the specified position and the prestored position (input information) match, it is determined that the pulse 301 is not caused by insulation deterioration, and the specified position is prestored. If the position (input information) does not match, it is determined that the pulse 301 is caused by insulation deterioration.

In addition, the feeder section is an insulator (including air) installed on the overhead line in order to distinguish different electric power systems that supply electric power to the electric railway.

Further, when considering a pulse 301 that is accidentally generated due to a disconnection or the like, it is arbitrary that the pulse 301 that is determined to be caused by insulation deterioration is generated at a set frequency or more (more than a predetermined number of times). It may be determined by the algorithm of No. 1 to determine whether insulation deterioration has occurred. Note that, for these analyzes, for example, machine learning or determination by artificial intelligence can be used.

Further, the abnormality detection device described in this embodiment may have a communication means with the ground-side device.

Further, the alarm device 204 outputs an alarm based on the determination result (insulation deterioration) (analysis result) of the analysis device 203.

The alarm includes a display on the monitor of the cab of the electric railway vehicle, a voice alarm, and an alarm (communication) to the ground side device. Further, the analysis result may be stored in the storage device 205 and output when the electric railway vehicle arrives at the base of the electric railway vehicle (after the operation of the electric railway vehicle ends). It should be noted that such warning means is specified and well known in the specifications of electric railway vehicles.

In this embodiment, the abnormality detection device is described as being mounted on an electric railway vehicle, but is not necessarily limited to an electric railway vehicle, and for example, power is supplied from an overhead line, a track, a road, or the like. It can be applied to any moving body.

That is, the abnormality detection device described in the present embodiment is to be installed in an electric railway vehicle having a high voltage device, and the voltage (that is, electric A voltage conversion device 201 that AD-converts a voltage flowing in a high-voltage device mounted on a railway vehicle, a waveform analysis device 202 that analyzes the AD-converted waveform signal, and a position that creates a position signal of the position of the electric railway vehicle. A detection device 206, a storage device 205 that stores a generation position of a surge voltage generated in an electric railway vehicle, a position where a pulse is generated based on a waveform signal and a position signal, and the specified position and surge And an analysis device 203 that analyzes whether or not this pulse is generated due to insulation deterioration (insulation abnormality) of the high-voltage equipment, based on the voltage generation position.

Further, the abnormality detection method described in the present embodiment is a method of detecting an abnormality in a high-voltage device mounted on an electric railway vehicle, and a voltage converter for converting a voltage flowing through the high-voltage device mounted on the electric railway vehicle. A step of AD conversion in 201, a step of analyzing the AD-converted waveform signal in the waveform analysis device 202, a step of creating a position signal of the position of the electric railway vehicle in the position detection device 206, The step of storing the generation position of the surge voltage generated in the vehicle in the storage device 205, the position where the pulse is generated is specified on the basis of the waveform signal and the position signal, and the specified position and the generation position of the surge voltage are identified. Based on this, the analysis device 203 analyzes whether or not this pulse is generated due to insulation deterioration (insulation abnormality) of the high-voltage equipment.

The surge voltage is often generated at a specific place (position), such as the position of a base of an electric railway vehicle or the position of a feeder section.

Then, based on the voltage change detected by the instrument transformer 109 or the instrument resistor 111 and the position of the electric railway vehicle detected by the vehicle position sensor 207, the position where the pulse is generated is identified and specified. Whether the pulse is generated due to insulation deterioration of the high-voltage equipment is analyzed based on the position where the high voltage device is generated and the position where the surge voltage is generated.

In addition, if a pulse that is determined to have occurred due to insulation deterioration of the high-voltage equipment frequently occurs, it can be determined that the insulation deterioration of the high-voltage equipment has occurred.

According to this embodiment, it is possible to detect the insulation abnormality of the high-voltage equipment mounted on the electric railway vehicle at an early stage. For example, it is possible to detect an insulation abnormality of a high-voltage device mounted on an electric railway vehicle while the electric railway vehicle is in operation.

FIG. 6 is an explanatory diagram illustrating an abnormality detection device that detects an insulation abnormality of a high-voltage device mounted on an electric railway vehicle according to the second embodiment.

The abnormality detection device described in the present embodiment is a current that AD-converts the output current output from the current measuring device 401 installed on the current collector 101 side or the current measuring device 402 installed on the axle 108 side in the electric circuit. It has a conversion device 601.

In other words, the abnormality detection device described in the first embodiment and the abnormality detection device described in the second embodiment have a difference in whether to use voltage or current. The abnormality detection device described in the first embodiment uses the output voltage output from the instrument transformer 109 or the instrument resistor 111 to determine insulation deterioration, whereas the abnormality detection device described in the second embodiment. The abnormality detecting device determines the insulation deterioration of the high-voltage equipment by using the output current output from the current measuring device 401 or the current measuring device 402.

In this way, insulation deterioration of high-voltage equipment can be detected even by using current.

In the present embodiment, the current measuring devices (401, 402) are installed at two locations on the electric power collector 101 side and the axle 108 side of the electric circuit, but at any location where a pulse due to insulation deterioration can be detected. , But not limited to these two locations. Further, either one may be provided.

Further, as the current measuring device, a current transformer, a resistor, a magnetic field sensor and the like are preferable.

That is, the abnormality detection device described in the present embodiment is installed in an electric railway vehicle having a high-voltage device, and a current converter 601 that AD-converts a current flowing in the high-voltage device installed in the electric railway vehicle. A waveform analysis device 202 that analyzes the AD-converted waveform signal; a position detection device 206 that creates a position signal of the position of the electric railway vehicle; and a memory that stores the position of the surge current generated in the electric railway vehicle. The position where the pulse is generated is specified based on the device 205 and the waveform signal and the position signal, and based on the specified position and the position where the surge current is generated, the pulse causes the insulation deterioration (insulation abnormality) of the high-voltage equipment. ), and an analysis device 203 for analyzing whether or not it is generated by

Further, the abnormality detection method described in the present embodiment is a method of detecting an abnormality in a high-voltage device mounted on an electric railroad vehicle, in which a current flowing through a high-voltage device mounted on the electric railroad vehicle is converted into a current converter. A step of AD conversion in 201, a step of analyzing the AD-converted waveform signal in the waveform analysis device 202, a step of creating a position signal of the position of the electric railway vehicle in the position detection device 206, The step of storing the generation position of the surge current generated in the vehicle in the storage device 205, the position where the pulse is generated is specified based on the waveform signal and the position signal, and the specified position and the generation position of the surge current are identified. Based on this, the analysis device 203 analyzes whether or not this pulse is generated due to insulation deterioration (insulation abnormality) of the high-voltage equipment.

According to this embodiment, it is possible to detect the insulation abnormality of the high-voltage equipment mounted on the electric railway vehicle at an early stage. For example, it is possible to detect an insulation abnormality of a high-voltage device mounted on an electric railway vehicle while the electric railway vehicle is in operation.

The abnormality detection device described in the present embodiment has the same basic configuration as the abnormality detection device described in the first embodiment and the abnormality detection device described in the second embodiment.

In the first or second embodiment, the insulation deterioration is determined based on the pulse voltage change or the pulse current change, but in the present embodiment, the insulation deterioration is determined based on the pulse frequency change. The pulse frequency means a frequency range (range) in which a pulse voltage change or a pulse current change occurs.

That is, in the present embodiment, the difference between the frequency of the pulse due to the surge voltage and the frequency of the pulse due to the insulation deterioration, and the difference between the frequency of the pulse due to the surge current and the frequency of the pulse due to the insulation deterioration are used. Deteriorate.

Furthermore, insulation deterioration may be comprehensively determined, including voltage and current.

That is, in the present embodiment, the analysis device 203 identifies the position where the pulse is generated based on the waveform signal and the position signal, and determines the identified position and the change position of the frequency of the surge voltage or the change of the frequency of the surge current. Based on the position and the position, it is analyzed whether or not the pulse is caused by insulation deterioration (insulation abnormality) of the high-voltage equipment.

According to this embodiment, it is possible to detect the insulation abnormality of the high-voltage equipment mounted on the electric railway vehicle at an early stage. For example, it is possible to highly accurately detect an insulation abnormality of a high-voltage device mounted on an electric railway vehicle while the electric railway vehicle is in operation.

FIG. 7 is an explanatory diagram illustrating an electric railway vehicle according to the fourth embodiment.

The electric railway vehicle described in the present embodiment is equipped with the abnormality detection device described in the first, second, or third embodiment, and includes an electric railway vehicle and an electric railway vehicle of the same formation. And a communication device for communicating between an electric railway vehicle of a certain formation and an electric railway vehicle of another formation.

The electric railway vehicle described in this embodiment includes an abnormality detection device 502, a current collector 101, a main motor 107, and a high voltage device 501.

The abnormality detection device 502 is the abnormality detection device described in the first embodiment, the second embodiment, or the third embodiment, and is high based on the voltage change, the current change, the voltage frequency change, or the current frequency change. Insulation deterioration of the voltage device 501 is determined.

Furthermore, the electric railway vehicle described in this embodiment has a wireless antenna 504 and a communication line 503 as a communication device. That is, the communication line 503 is used to communicate between the electric railway vehicles of the same formation and the electric railway vehicles, the wireless antenna 504 is used, and the electric railway vehicle of one formation and the electric railway of another formation are used. Communicate with the vehicle.

The communication device transmits a pulse due to the surge voltage or the surge current detected by the abnormality detection device 502, and determines the insulation deterioration of the high voltage device 501.

Further, in the present embodiment, the communication device is installed in the abnormality detection device, and the communication device is provided between the electric railway vehicle and the electric railway vehicle of the same formation or between the electric railway vehicle of a certain formation and another. To communicate with the trains of electric railways. The communication device may be mounted on the abnormality detection device described in the first, second, or third embodiment.

In this way, between the electric railway vehicles of the same formation and the electric railway vehicles, between the electric railway vehicles of a certain formation and the electric railway vehicles of another formation, the high-voltage equipment 501 By sharing the information for determining the insulation deterioration, the insulation deterioration of the high-voltage equipment 501 can be determined with high accuracy.

For example, a pulse is generated due to a surge voltage or a surge current at a base of an electric railway vehicle or a feeder section, but during the operation (travel) of the electric railway vehicle, a disconnection between the current collector 101 and the overhead wire or a contact to the overhead wire is generated. A pulse may be generated by icing.

If it is not possible to predict the position where a pulse will occur in advance, if a similar pulse is detected at the same position in the same train, the cause of the pulse is determined to be a contact break or icing, and insulation is performed. It can be excluded from pulses due to degradation.

In addition, if it is not possible to predict the position where such a pulse will occur in advance, if a similar pulse is detected at the same position in other trains, it is determined that the cause of the pulse is a contact line or icing. However, it can be excluded from the pulse due to insulation deterioration.

Thereby, the insulation deterioration of the high voltage device 501 can be determined with high accuracy.

The electric railway vehicle described in the present embodiment is detected by using wired communication between the abnormality detection device mounted on the electric railway vehicle of the same formation and the abnormality detection device mounted on the electric railway vehicle. By sharing the generated voltage and current pulses, it is possible to highly accurately determine the insulation deterioration of the high voltage device 501.

Further, the electric railway vehicle described in the present embodiment is a wireless system between an abnormality detection device mounted on an electric railway vehicle of a certain formation and an abnormality detection device mounted on an electric railway vehicle of another formation. By using communication, the detected voltage or current pulse is shared, and insulation deterioration of the high-voltage equipment 501 is highly accurately determined.

Although the abnormality detection device is mounted on the electric railway vehicle in this embodiment, it may be installed on the ground.

Also, the frequency of the detected voltage or current may be used.

As described above, according to the present embodiment, it is possible to provide an electric railway vehicle that can detect an insulation abnormality of a high-voltage device at an early stage. For example, the electric railway vehicle described in the present embodiment can detect the insulation abnormality of the high-voltage equipment with high accuracy even while the electric railway vehicle is in operation.

It should be noted that the present invention is not limited to the above-described embodiments, but includes various modifications. For example, the above-described embodiments have been described in detail in order to explain the present invention in an easy-to-understand manner, and are not necessarily limited to those having all the configurations described. Further, it is possible to replace part of the configuration of one embodiment with part of the configuration of another embodiment, or to add part of the configuration of another embodiment to the configuration of one embodiment. Is.

101: Current collector, 102: Circuit breaker, 103: AC/DC switch, 104: Main transformer, 105: Converter, 106: Inverter, 107: Main motor, 108: Axle, 109: Instrument transformer, 111: Instrument Resistor, 201: voltage conversion device, 202: waveform analysis device, 203: analysis device, 204: alarm device, 205: storage device, 206: position detection device, 207: vehicle position sensor, 300: basic waveform, 301: Pulse waveform, 302: noise waveform, 401, 402: current measuring device, 501: high voltage device, 502: abnormality detecting device, 503: communication line, 504: wireless antenna, 601: current converting device

Claims (7)

A voltage conversion device for AD-converting a voltage flowing in a high-voltage device mounted on an electric railway vehicle;
A waveform analyzer for analyzing the AD-converted waveform signal;
A position detection device that creates a position signal of the position of the electric railway vehicle,
A storage device that stores a position where a surge voltage is generated in the electric railway vehicle,
A position where a pulse is generated is specified based on the waveform signal and the position signal, and the pulse is generated due to an insulation abnormality of the high-voltage device, based on the specified position and the position where the surge voltage is generated. An analysis device that analyzes whether it is a thing,
An abnormality detecting device having: A current conversion device for AD-converting a voltage flowing in a high-voltage device mounted on an electric railway vehicle;
A waveform analyzer for analyzing the AD-converted waveform signal;
A position detection device that creates a position signal of the position of the electric railway vehicle,
A storage device for storing a position where a surge current is generated in the electric railway vehicle,
A position where a pulse is generated is specified based on the waveform signal and the position signal, and the pulse is generated due to an insulation abnormality of the high-voltage device, based on the specified position and the position where the surge current is generated. An analysis device that analyzes whether it is a thing,
An abnormality detecting device having: The analysis device, based on the waveform signal and the position signal, to identify the position where the pulse occurs, based on the identified position and the change position of the frequency of the surge voltage or the change position of the frequency of the surge current The abnormality detection device according to claim 1 or 2, wherein it is analyzed whether or not the pulse is generated due to an insulation abnormality of the high-voltage device. A communication device for communicating between an electric railway vehicle of the same formation and an electric railway vehicle, or between an electric railway vehicle of a certain formation and an electric railway vehicle of another formation. The abnormality detection device according to claim 1 or 2. An electric railroad vehicle comprising the abnormality detection device according to claim 1 or 2. An electric railroad vehicle comprising the abnormality detection device according to claim 4. The voltage that flows in the high-voltage equipment mounted on the electric railway vehicle is AD converted by the voltage converter,
The AD-converted waveform signal is analyzed by a waveform analyzer,
Create a position signal of the position of the electric railway vehicle with a position detection device,
The generation position of the surge voltage generated in the electric railway vehicle is stored in a storage device,
A position where a pulse is generated is specified based on the waveform signal and the position signal, and the pulse is generated due to an insulation abnormality of the high-voltage device, based on the specified position and the position where the surge voltage is generated. Whether it is a thing or not is analyzed by an analysis device,
An anomaly detection method characterized by the above.

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