Current detection device suitable for electrified railway contact network

Abstract

The invention relates to the field of current detection of a railway contact network, and discloses a current detection device, which comprises an induction power supply module, a current sensor and a main control unit module, wherein the induction power supply module is used for converting magnetic field energy of a detected current position into electric energy and providing the electric energy for the current sensor and the main control unit module; the current sensor is used for collecting a current signal of a detected current position and transmitting the current signal to the main control unit module; and the main control unit module is used for converting the current signal into a digital current signal and identifying an abnormal current signal in the digital current signal. A detected current signal can be converted into a digital current signal, and an abnormal current signal in the digital current signal can be quickly identified; therefore, the fault position can be quickly positioned according to the installation position of the current detection device.

Description

Technical Field

[0001] This application relates to the field of current detection for railway catenaries, and particularly to a current detection device applicable to the catenaries of electrified railways. Background Art

[0002] In electrified railways, the catenary has a complex structure and a harsh operating environment, and is vulnerable to lightning strikes, equipment failures, and external environmental impacts. Especially for the catenary of the yard tracks, due to its complex structure, the probability of failure is higher. When a fault occurs in an electrified railway, quickly finding the fault point and dealing with it is an important link to ensure transportation. Although the existing "fault location devices" in substations can basically locate the fault points of the main line catenary, for complex yards, large hub areas, and situations where the catenary connection points are not at the neutral section, due to the complex catenary structure and numerous branch lines, it is difficult to locate faults. It takes a lot of time and effort for maintenance personnel to find faults. Especially in bad weather and complex geological conditions, the catenary is prone to failure, and it is even more difficult to conduct line inspections to find faults, resulting in a waste of a large amount of human and material resources. Summary of the Invention

[0003] An object of an embodiment of this application is to provide a current detection device applicable to the catenary of an electrified railway to solve the technical defects existing in the above-mentioned prior art.

[0004] In a first aspect, an embodiment of this application provides a current detection device applicable to the catenary of an electrified railway, including:

[0005] An induction power supply module, a current sensor, and a main control unit module;

[0006] The induction power supply module is used to convert the magnetic field energy at the position of the current to be detected into electrical energy to provide electrical energy for the current sensor and the main control unit module;

[0007] The current sensor is used to collect the current signal at the position of the current to be detected and transmit the current signal to the main control unit module;

[0008] The main control unit module is used to convert the current signal into a digital current signal and identify the abnormal current signal in the digital current signal.

[0009] The current detection device in the embodiment of the present application includes an induction power supply module, a current sensor, and a main control unit module; the induction power supply module can be used to convert the magnetic field energy at the position of the current to be detected into electrical energy to provide electrical energy for the current sensor and the main control unit module. When this current detection device is applied to an electrified railway with a diverse catenary structure and a complex operating environment, for detecting faults in the catenary of the railway trunk line, the induction power supply module in the current detection device can convert the magnetic field generated by the catenary current into electrical energy, thereby providing a stable, continuous, and low-power working power supply for the current detection device without the need to provide an additional power supply. Additionally, the current signal at the fault position can be collected by the current sensor in the current detection device and transmitted to the main control unit module; the main control unit module converts the current signal into a digital current signal. When a lightning strike or grounding fault occurs in the catenary, a large-amplitude impulse current will flow through the catenary line. When a lightning strike or grounding fault occurs in the catenary, a large-amplitude impulse current will flow through the catenary line, and the large-amplitude impulse current will also be fed back into the digital current signal, and the abnormal current signal in the digital current signal can be quickly identified; thus, the fault position can be quickly located according to the position of the current detection device.

[0010] In an optional implementation manner, the induction power supply module includes an energy-taking induction coil, a rectification unit, a filtering unit, and an energy storage unit;

[0011] The energy-taking induction coil is used to convert the changing magnetic field at the position of the detected current into an induced current;

[0012] The rectification unit is used to rectify the induced current to obtain a unidirectional current;

[0013] The filtering unit is used to filter the unidirectional current to obtain a direct current;

[0014] The energy storage unit is used to provide electrical energy for the current sensor and the main control unit module after being charged by the direct current.

[0015] In the embodiment of the present application, the induction power supply module includes an energy-taking induction coil, a rectification unit, a filtering unit, and an energy storage unit; the changing magnetic field at the position of the detected current can be converted into an induced current through the energy-taking induction coil; then, the rectification unit rectifies the induced current to obtain a unidirectional current; next, the filtering unit is used to filter the unidirectional current to obtain a direct current; finally, the energy storage unit is charged by the direct current to provide a stable, continuous, and low-power working power supply for the current detection device.

[0016] In an optional implementation manner, the energy storage unit includes a super capacitor and a battery.

[0017] In the embodiment of the present application, the energy storage unit includes a super capacitor and a battery; the super capacitor can quickly charge, which can be targeted at the intermittent and short-term characteristics of the load current of the catenary line; in addition, since the discharge speed of the super capacitor is also fast, in order to meet the demand for the long-term stable operation of the current detection sensor, a battery is connected behind the super capacitor. When there is a load current on the catenary line, the super capacitor is quickly charged. When there is no load current on the catenary line, the super capacitor can charge the battery, and then the battery provides a stable power supply for the load.

[0018] In an alternative embodiment, the induction power supply module further includes: a transient protection unit and an overvoltage protection unit;

[0019] The transient protection unit is arranged between the energy-taking induction coil and the rectification unit, and is used to suppress the transient peak voltage generated by the energy-taking induction coil;

[0020] The overvoltage protection unit is arranged between the filtering unit and the energy storage unit, and is used to stabilize the output voltage of the filtering unit.

[0021] In the embodiment of the present application, when the current detection device is applied to an electrified railway with a variety of catenary structures and complex operating environments, when a lightning strike or a ground fault occurs on the catenary, a large-amplitude impulse current will flow through the catenary line. Due to the short action time of the impulse current, the energy-taking induction coil will induce a very high peak pulse voltage, which is likely to cause impact damage to the subsequent circuit. Therefore, a transient protection unit is connected behind the energy-taking induction coil; when a peak pulse voltage appears, the transient protection unit will quickly start to clamp the voltage within a safe range and absorb the excess power.

[0022] In an alternative embodiment, the main control unit module includes a main control chip and a wireless transceiver unit;

[0023] The main control chip is used to convert the current signal into a digital current signal and identify the abnormal current signal in the digital current signal;

[0024] The wireless transceiver unit is used to send the abnormal current signal to the control center.

[0025] In the embodiment of the present application, the main control unit module includes a main control chip and a wireless transceiver unit. After the main control chip identifies the abnormal current signal, it can also send the abnormal current signal to the control center through the wireless transceiver unit so that the control center can make timely processing.

[0026] In an alternative embodiment, the main control unit module further includes a signal conversion unit;

[0027] The signal conversion unit is arranged between the main control chip and the wireless transceiver unit;

[0028] The main control chip is further configured to convert the abnormal current signal into an RF radio frequency signal, and the signal conversion unit is configured to convert the RF radio frequency signal into a wireless signal;

[0029] The wireless transceiver unit is configured to send the wireless signal to the control center.

[0030] In an alternative embodiment, the main control unit module further includes a decoupling capacitor unit;

[0031] The decoupling capacitor unit is configured to filter out the clutter signals in the current provided by the induction power supply module to the main control chip.

[0032] In an alternative embodiment, the main control unit module further includes a clock unit;

[0033] The clock unit is configured to provide a clock signal to the main control chip.

[0034] In an alternative embodiment, the current detection device further includes a GPS module;

[0035] The GPS module is configured to determine the positioning information of the position of the detected current and provide a synchronous clock signal to the main control unit module;

[0036] The main control unit module is further configured to add a timestamp to the abnormal current signal.

[0037] In the embodiment of the present application, the current detection device further includes a GPS module, and the GPS module can be used to determine the positioning information of the position of the detected current and provide a synchronous clock signal to the main control unit module. Therefore, the time of all current detection devices can be synchronized by synchronizing the time of all current detection devices with the GPS or Beidou time, and then a timestamp is added to the current data collected by the current detection device, so that the current acquisition data of all current detection devices at the same moment can be obtained, and the position of each current detection device can be accurately located. Thus, based on the abnormal current signal received by the control center, the fault position can be quickly and accurately located.

[0038] In an alternative embodiment, the current sensor is a Hall current sensor.

[0039] In the embodiments of the present application, in order to ensure the linearity of the current passing through in the large span range of 0 - 1000A and the accuracy of measurement, a Hall current sensor is used to detect the current. The current detection device can operate within the frequency range of 0 - 100kHz, and a faster response speed can be obtained, with a response time of less than 1s. Description of the Drawings

[0040] One or more embodiments are exemplarily illustrated by the pictures in the corresponding drawings. These exemplary illustrations do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements. Unless otherwise stated, the drawings in the figures do not constitute a scale limitation.

[0041] Figure 1 Schematic diagram of a current detection device applicable to the catenary of electrified railways provided by the embodiments of the present application;

[0042] Figure 2 Schematic diagram of the induction power supply module provided by the embodiments of the present application;

[0043] Figure 3 Schematic diagram of a main control unit module provided by the embodiments of the present application;

[0044] Figure 4 Schematic diagram of another main control unit module provided by the embodiments of the present application. Detailed Embodiments

[0045] In the following description, a large number of specific details are given to provide a more thorough understanding of the present application. However, it is obvious to those skilled in the art that the embodiments of the present application can be implemented without one or more of these details. In other examples, in order to avoid confusion with the embodiments of the present application, some technical features well known to those skilled in the art are not described.

[0046] In the embodiments of the present application, ordinal numbers such as "first" and "second" cited in the present application are only identifiers and do not have any other meanings, such as a specific order, etc. Moreover, for example, the term "first component" itself does not imply the existence of a "second component", and the term "second component" itself does not imply the existence of a "first component".

[0047] In the embodiments of the present application, "upper", "lower", "front", "rear", "left", "right", etc. are only used to represent the relative positional relationship between relevant parts, rather than defining the absolute positions of these relevant parts.

[0048] In the embodiments of the present application, "equal", "same", etc. are not strict mathematical and / or geometric limitations, and also include errors that can be understood by those skilled in the art and are allowed in manufacturing or using, etc.

[0049] Unless otherwise specified, the numerical ranges in this document include not only the entire range between its two endpoints, but also several sub-ranges contained therein.

[0050] Reference Figure 1 , which is a schematic diagram of a current detection device applicable to the catenary of electrified railways provided by an embodiment of the present application, including: an induction power supply module, a current sensor, and a main control unit module; wherein, the induction power supply module is used to convert the magnetic field energy at the position of the current to be detected into electrical energy to provide electrical energy for the current sensor and the main control unit module; the current sensor is used to collect the current signal at the position of the current to be detected and transmit the current signal to the main control unit module; the main control unit module is used to convert the current signal into a digital current signal and identify the abnormal current signal in the digital current signal.

[0051] Among them, the position of the current to be detected specifically refers to the position where the current detection device is installed in the line to be detected, and the line to be detected can be the carrier cable of the catenary in electrified railways. Due to the shunt relationship between the carrier cable and the catenary, the magnitude of the current in the carrier cable measured by the current detection sensor is approximately equal to the magnitude of the catenary current.

[0052] Specifically, the current sensor is a Hall current sensor. The current passing through the carrier cable is in the range of 0 - 1000A, and the span is too large. If a general current transformer is selected, magnetic saturation is likely to occur, and good linearity cannot be guaranteed, resulting in a large current measurement error. Therefore, in order to ensure the linearity of the current passing through in the large span range of 0 - 1000A and the accuracy of measurement, a Hall current sensor is used to measure the current passing through the carrier cable. A Hall current sensor is a current measurement element that can isolate the primary side measurement circuit and the secondary side control circuit. Based on the Hall effect principle, it converts the primary side current into a signal that can be directly collected by various instruments, and the primary and secondary sides are highly insulated. Compared with a current transformer, the working frequency band of the Hall current sensor is not only wider, and it can work in the frequency range of 0 - 100kHz at the highest, but also its response speed is faster, and its response time can be less than 1s. The selected Hall current sensor has an accuracy of less than 1% in the range of 0 - 1000A, a follow-up response time of less than 10s, and a frequency band width between 0 - 20kHz.

[0053] The current detection device in the embodiment of the present application includes an induction power supply module, a current sensor, and a main control unit module; the induction power supply module can be used to convert the magnetic field energy at the position of the current to be detected into electrical energy to provide electrical energy for the current sensor and the main control unit module. When this current detection device is applied to an electrified railway with diverse catenary structures and complex operating environments, for detecting faults in the catenary of railway main lines, the induction power supply module in the current detection device can convert the magnetic field generated by the messenger wire current into electrical energy, thereby providing a stable, continuous, and low-power working power supply for the current detection device without the need for an additional power supply. Additionally, the current sensor in the current detection device can collect the current signal at the fault position and transmit the current signal to the main control unit module; the main control unit module converts the current signal into a digital current signal. When lightning strikes or a grounding fault occurs in the catenary, a large-amplitude impulse current will flow through the catenary line. When lightning strikes or a grounding fault occurs in the catenary, a large-amplitude impulse current will flow through the catenary line, and the large-amplitude impulse current will also be fed back into the digital current signal, and the abnormal current signal in the digital current signal can be quickly identified; thus, the fault position can be quickly located according to the installation position of the current detection device.

[0054] As Figure 1 shown, the current detection device further includes a GPS module; the GPS module is used to determine the positioning information of the position of the current to be detected and provide a synchronous clock signal for the main control unit module; the main control unit module is further used to add a timestamp to the abnormal current signal. The current acquisition data is transmitted to the information acquisition device of the control center by means of ZigBee wireless networking communication.

[0055] Specifically, the L76-K is adopted, which supports multi-satellite systems, including GPS, Beidou, GLONASS, and QZSS satellite systems, and has the functions of independent positioning of a single satellite system and joint positioning of multi-satellite systems. The L76-K module has a PPS (pulse per second) function and generates a high-level pulse signal every second, and its timing accuracy is less than 30 ns. At the same time, it will send the message information of the global synchronous time through the built-in UART interface.

[0056] In the embodiment of the present application, the current detection device further includes a GPS module, which can be used to determine the positioning information of the detected current position and provide a synchronous clock signal for the main control unit module. Therefore, by synchronizing the time of all current detection devices with the GPS or Beidou time, the time of all current detection devices can be synchronized, and then time stamps can be added to the current data collected by the current detection devices. In this way, the current acquisition data of all current detection devices at the same moment can be obtained, and the position of each current detection device can be accurately located. Thus, based on the abnormal current signal received by the control center, the fault position can be quickly and accurately located.

[0057] Reference Figure 2 , which is a schematic diagram of the induction power supply module provided in the embodiment of the present application, including an energy-taking induction coil, a rectifying unit, a filtering unit, and an energy storage unit; the energy-taking induction coil is used to convert the changing magnetic field of the detected current position into an induced current; the rectifying unit is used to rectify the induced current to obtain a unidirectional current; the filtering unit is used to filter the unidirectional current to obtain a direct current; the energy storage unit is used to charge through the direct current and provide electrical energy for the current sensor and the main control unit module.

[0058] Among them, the energy-taking induction coil uses a cylindrical magnetic core, and the magnetic core is made of silicon steel sheet material. Air gaps are opened on the left and right sides of the magnetic core to increase the current tolerance of the magnetic core. The magnetic core generates a magnetic field due to the current on the catenary, and multiple turns of coils are wound on the magnetic core to generate an induced voltage and connect to the subsequent circuit to supply power to it.

[0059] In the embodiment of the present application, the induction power supply module includes an energy-taking induction coil, a rectifying unit, a filtering unit, and an energy storage unit; the changing magnetic field of the detected current position can be converted into an induced current through the energy-taking induction coil; then the induced current is rectified by the rectifying unit to obtain a unidirectional current; next, the filtering unit is used to filter the unidirectional current to obtain a direct current; finally, the energy storage unit is charged through the direct current to provide a stable, continuous, and low-power working power supply for the current detection device.

[0060] Specifically, the energy storage unit includes a super capacitor and a battery. In the embodiment of the present application, the energy storage unit includes a super capacitor and a battery; the super capacitor can quickly charge, which can be aimed at the characteristics of the intermittent and short-term load current of the catenary line; in addition, since the discharge speed of the super capacitor is also fast, in order to meet the requirement of the long-term stable operation of the current detection sensor, a battery is connected behind the super capacitor. When there is a load current on the catenary line, the super capacitor is quickly charged. When there is no load current on the catenary line, the super capacitor can charge the battery, and then the battery provides a stable power supply for the load.

[0061] As Figure 2 shown, the induction power supply module further includes: a transient protection unit and an overvoltage protection unit; the transient protection unit is arranged between the energy-taking induction coil and the rectification unit for suppressing the transient spike voltage generated by the energy-taking induction coil; the overvoltage protection unit is arranged between the filtering unit and the energy storage unit for stabilizing the output voltage of the filtering unit.

[0062] In the embodiment of the present application, when the current detection device is applied to an electrified railway with a variety of catenary structures and complex operating environments, when a lightning strike or a grounding fault occurs in the catenary, a large-amplitude impulse current will flow through the catenary line. Due to the short action time of the impulse current, the energy-taking induction coil will induce a very high peak pulse voltage, which is likely to cause impact damage to the subsequent circuit. Therefore, a transient protection unit is connected behind the energy-taking induction coil; when a spike pulse voltage appears, the transient protection unit will quickly start to clamp the voltage within a safe range and absorb the excess power.

[0063] Refer to Figure 3 , which is a schematic diagram of a main control unit module provided by the embodiment of the present application. The main control unit module includes a main control chip and a wireless transceiver unit; the main control chip is used for converting the current signal into a digital current signal and identifying the abnormal current signal in the digital current signal; the wireless transceiver unit is used for sending the abnormal current signal to the control center.

[0064] In the embodiment of the present application, the main control unit module includes a main control chip and a wireless transceiver unit. After the main control chip identifies the abnormal current signal, it can also send the abnormal current signal to the control center through the wireless transceiver unit so that the control center can make timely processing.

[0065] As Figure 3 shown, the main control unit module further includes a signal conversion unit; the signal conversion unit is arranged between the main control chip and the wireless transceiver unit; the main control chip is further used for converting the abnormal current signal into an RF radio frequency signal, and the signal conversion unit is used for converting the RF radio frequency signal into a wireless signal; the wireless transceiver unit is used for sending the wireless signal to the control center.

[0066] As Figure 3 shown, the main control unit module further includes a decoupling capacitor unit; the decoupling capacitor unit is used for filtering out the clutter signal in the current provided by the induction power supply module to the main control chip.

[0067] As Figure 3 shown, the main control unit module further includes a clock unit; the clock unit is used for providing a clock signal for the main control chip.

[0068] Reference Figure 4 , which is another schematic diagram of the main control unit module provided by the embodiment of the present application; the main control chip of the main control unit module uses the wireless radio frequency chip CC2530F256. The chip internally has 8 input channels and an ADC (analog-to-digital converter) with a 12-bit resolution. By configuring the analog differential input mode, it can perform analog-to-digital conversion on the sampling signal of the Hall current sensor at a frequency of 4 kHz; the chip internally has 2 USARTs (universal synchronous / asynchronous transceiver), which can be configured as UART (universal asynchronous transceiver) mode. By adjusting the baud rate, data bits, stop bits, parity bits, etc. of data transmission, it can communicate with the GPS module and receive the global synchronous timing information from the GPS module, so as to synchronize the system clock; the chip internally integrates an RF (radio frequency) transceiver, which operates in the 2.4 GHz frequency band and supports the ZigBee wireless communication protocol. By implementing the development of the ZigBee protocol stack, the current detection sensor can be added to the ZigBee wireless network for wireless networking communication.

[0069] The schematic diagram of the main control unit module is as Figure 4 shown. In the schematic diagram, in addition to the CC2530F256 chip, it mainly includes: ① the bypass decoupling capacitor (decoupling capacitor unit) between the power supply terminal and the chip pin, whose purpose is to filter out the noise in the power supply driving current and avoid the coupling interference between driving currents at the same time; ② the external clock circuit (clock unit) of the chip. There are two RC oscillators inside the CC2530F256 chip, and their clock frequencies are 16 MHz and 32 kHz respectively. Their power consumption is low, but their accuracy is poor. When enabling the RF transceiver, the instability of the RC oscillator is difficult to ensure the normal operation of the RF function. Therefore, an external crystal oscillator must be used. A 32 MHz quartz crystal oscillator is connected between the XOSC_Q1 and XOSC_Q2 pins of the CC2530F256 chip to provide an accurate main system clock source for the CPU (central processing unit), and a 32.768 kHz quartz crystal oscillator is connected between the XOSC32K_Q1 and XOSC32K_Q2 pins of the chip to provide a low-frequency clock source for the watchdog timer and the sleep timer; ③ the balun matching circuit (signal conversion unit) of the chip. When the RF transceiver of the CC2530F256 transceiver RF signals, RF differential signals will be transmitted on the RF_P and RF_N pins of the chip, and the pin impedance is (69 + j29) Ω, while the backend is a single-ended antenna with a 50 Ω impedance. Therefore, it is necessary to convert the RF differential signal into a single-ended signal, and an LC balun matching circuit is adopted on the RF_P and RF_N pins of the chip to achieve the matching transmission of the RF differential signal.

[0070] In the embodiment of the present application, the current detection device adopts a scheme of hybrid energy storage mode of supercapacitor and battery to provide the working power supply. In view of the intermittent and short-term characteristics of the load in electrified railways, especially in large hubs, stations and other areas, the advantage of fast charging speed of the supercapacitor is utilized for fast charging. At the same time, in view of the requirement of providing a stable, continuous and low-power working power supply for the current detection sensor, the characteristic of slow discharge of the lithium battery is utilized to provide the working power supply. In addition, a scheme of time synchronization for the current detection device by using the GPS module is also adopted. By synchronizing the internal system time of all current detection devices with the GPS or Beidou time, the time of all current detection devices is synchronized, and then the time stamp is attached to the current data collected by the current detection sensor, so that the current acquisition data of all current detection sensors at the same moment can be obtained.

[0071] Unless otherwise defined, the technical and scientific terms used in the present application have the same meanings as those commonly understood by those skilled in the technical field of the present application. The terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present application. Terms such as "arranged" appearing herein can mean that one component is directly attached to another component or that one component is attached to another component through an intermediate member. The features described in one embodiment herein can be applied to another embodiment alone or in combination with other features, unless the feature is not applicable or otherwise stated in that other embodiment.

[0072] The present application has been described through the above embodiments, but it should be understood that the above embodiments are only for the purpose of illustration and example, and are not intended to limit the present application within the scope of the described embodiments. Those skilled in the art can understand that more variations and modifications can be made according to the teachings of the present application, and these variations and modifications all fall within the scope claimed by the present application.

Claims

1. A current detection device suitable for electrified railway contact network, characterized in that: include: Inductive power supply module, current sensor, main control unit module; The induction power supply module is used to convert the magnetic field energy of the detected current position into electrical energy to provide electrical energy for the current sensor and the main control unit module; The current sensor is used to collect the current signal of the detected current position and transmit the current signal to the main control unit module; The main control unit module is used to convert the current signal into a digital current signal and identify abnormal current signals in the digital current signal.

2. The current detection device suitable for electrified railway contact network according to claim 1, characterized in that: The induction power supply module includes: an energy-taking induction coil, a rectification unit, a filtering unit and an energy storage unit; The energy-taking induction coil is used to convert the changing magnetic field of the detection current position into an induced current; The rectifying unit is used for rectifying the induced current to obtain a unidirectional current; The filtering unit is used to filter the unidirectional current to obtain a direct current; The energy storage unit is used to provide electric energy to the current sensor and the main control unit module after being charged by the direct current.

3. The current detection device suitable for electrified railway contact network according to claim 2, characterized in that: The energy storage unit includes a super capacitor and a battery.

4. The current detection device suitable for electrified railway contact network according to claim 2 or 3, characterized in that: The inductive power supply module further includes: a transient protection unit and an overvoltage protection unit; The transient protection unit is arranged between the energy taking induction coil and the rectification unit, and is used to suppress the transient peak voltage generated by the energy taking induction coil; The overvoltage protection unit is arranged between the filter unit and the energy storage unit, and is used to stabilize the output voltage of the filter unit.

5. The current detection device suitable for electrified railway contact network according to claim 1, characterized in that: The main control unit module includes a main control chip and a wireless transceiver unit; The main control chip is used to convert the current signal into a digital current signal and identify abnormal current signals in the digital current signal; The wireless transceiver unit is used to send the abnormal current signal to the control center.

6. The current detection device suitable for electrified railway contact network according to claim 5, characterized in that: The main control unit module also includes a signal conversion unit; The signal conversion unit is arranged between the main control chip and the wireless transceiver unit; The main control chip is further used to convert the abnormal current signal into an RF signal. The signal conversion unit is used to convert the RF signal into a wireless signal. The wireless transceiver unit is used to send the wireless signal to the control center.

7. The current detection device suitable for electrified railway contact network according to claim 5, characterized in that: The main control unit module also includes a decoupling capacitor unit; The decoupling capacitor unit is used to filter out the clutter signal in the current provided by the inductive power module to the main control chip.

8. The current detection device suitable for electrified railway contact network according to claim 5, characterized in that: The main control unit module also includes a clock unit; The clock unit is used to provide a clock signal for the main control chip.

9. The current detection device suitable for electrified railway contact network according to claim 1, characterized in that: The current detection device also includes a GPS module; The GPS module is used to determine the location information of the detected current position and provide a synchronous clock signal for the main control unit module; The main control unit module is also used to add a timestamp to the abnormal current signal.

10. The current detection device applicable to the electrified railway contact network according to claim 1, characterized in that: The current sensor is a Hall current sensor.

Images