Self-monitoring choke transformer

Abstract

The utility model discloses a self-monitoring choke transformer which comprises a choke transformer body and a self-monitoring device, the self-monitoring device is installed on the choke transformer body, the choke transformer body and the self-monitoring device are integrally arranged in a box body of the choke transformer, and the choke transformer body comprises a traction coil and a signal coil. The traction coil and the signal coil are oppositely arranged, the self-monitoring equipment comprises a monitoring and diagnosing module and a current sensor, the monitoring and diagnosing module is connected with the current sensor, the current sensor comprises a single-head sensor and a double-head sensor, the single-head sensor is connected with the signal coil, and the double-head sensor is connected with the traction coil. The indoor side current and the steel rail side current of the trackside choke transformer equipment are collected in real time, the monitoring and diagnosis module analyzes, extracts and calculates mixed signals, basic operation data of a track circuit can be collected conveniently, and analysis and fault positioning of faults such as traction unbalanced current, steel rail insulation joint insulation damage, rail breakage and adjacent line interference are assisted.

Description

TECHNICAL FIELD

[0001] The utility model belongs to rail transit railway signal technical field, concretely relates to a self monitoring choke transformer. BACKGROUND

[0002] At present, the 25Hz phase-sensitive track circuit monitoring in the station only collects receiving end voltage, phase and track relay state, and cannot effectively locate the fault after the fault occurs, and can only find the fault through the way of segment-by-segment test, so the fault handling efficiency is low. The whole station system monitoring and diagnosis system is still in a blank state, and the problems faced are:

[0003] (1) The short-circuit and open-circuit faults of the equipment cannot be located. For the same track circuit fault phenomenon, the causes may be open circuit, short circuit and other conditions. The monitoring system only has the voltage and phase of the power receiving end relay side, and the parameters, spectrum analysis and outdoor trackside equipment electrical characteristics of the remaining equipment ports are not collected, and the real operation state of the track circuit equipment cannot be recorded comprehensively.

[0004] (2) Unbalanced traction current interference problem. There are two types of unbalanced traction current. One is single-end grounding fault of the rail, which is caused by factors such as poor insulation of fasteners and buried rail bottom of ballast. The other is the most common unbalanced structure of turnout, which affects the use of track circuit and may even cause vehicle error action. The choke transformer is equipped with an adapter, and there is a protection box in the room for 50Hz power frequency signal filtering. However, when the unbalance degree is greater than 10%, or there are a large number of odd harmonic components in the traction current, it will affect the normal use of the track circuit. The signal centralized monitoring system does not have spectrum analysis function, and only shows the increase or decrease of amplitude, so there is not enough effective information for analysis.

[0005] (3) Wire breakage checking problem. In electrified sections, in order to ensure the smoothness of the traction return path, the center connection points of the choke transformers on both sides of the insulating joint need to be connected, and in order to balance the up and down traction currents, horizontal connecting lines are set at the entrance and interval, which need to be grounded. This causes a third wire from the power supply end to the receiving end, commonly known as the "third rail" detour loop. When the detour impedance is insufficient, the choke transformer rail connecting line is broken, and the relay cannot be reliably dropped. When the connecting line power supply and receiving end are double broken on the same side, there is even a safety risk of losing the shunt check. UTILITY MODEL CONTENTS

[0006] The utility model aims at overcoming the problems in the prior art that the centralized 25Hz phase-sensitive track circuit only collects receiving end voltage, phase and track relay state, does not collect the working parameters of outdoor trackside equipment, and cannot effectively analyze and locate the fault after the fault occurs, and proposes a self-monitoring choke transformer.

[0007] To achieve the above object, the utility model discloses the following technical scheme:

[0008] A self-monitoring choke transformer, comprising a choke transformer body and a self-monitoring device, the self-monitoring device is installed on the choke transformer body, the choke transformer body and the self-monitoring device are integrally arranged in the box body of the choke transformer, the choke transformer body comprises a traction coil and a signal coil, the traction coil is arranged opposite to the signal coil, the self-monitoring device comprises a monitoring and diagnosing module and a current sensor, the monitoring and diagnosing module is connected with the current sensor, the current sensor comprises a single-head sensor and a double-head sensor, the single-head sensor is connected with the signal coil, and the double-head sensor is connected with the traction coil.

[0009] Further, the choke transformer body further comprises an iron core, and the iron core is arranged between the traction coil and the signal coil.

[0010] Further, the choke transformer body further comprises a resonance matcher, and the resonance matcher is connected with the signal coil.

[0011] Further, the resonance matcher adopts a 50Hz series resonance circuit, and a 25Hz parallel resonance circuit is adopted between the resonance matcher and the signal coil.

[0012] Further, the single-head sensor is installed on the panel of the resonance matcher.

[0013] Further, the double-head sensor is installed on the traction bolt of the choke transformer.

[0014] Further, the current sensor adopts a closed current transformer, one single-head sensor is arranged, and two double-head sensors are arranged.

[0015] Further, the monitoring and diagnosing module comprises a PLC and an AC220V isolation conditioning circuit, an ADC acquisition circuit, a configuration serial port circuit and a PLC and CPU main control module, the input end of the ADC acquisition circuit is connected with the current signal output end of the current sensor, the output end of the ADC acquisition circuit is connected with the input end of the PLC and CPU main control module, the output end of the PLC and CPU main control module is connected with the input end of the PLC and AC220V isolation conditioning circuit, the output end of the PLC and AC220V isolation conditioning circuit is connected with indoor equipment, and the PLC and AC220V isolation conditioning circuit is connected with the configuration serial port through the configuration serial port circuit.

[0016] Further, the monitoring and diagnosing module is installed on the iron core pressing plate of the choke transformer.

[0017] Further, the monitoring diagnosis module adopts PLC power line carrier communication technology, the monitoring diagnosis module is connected with indoor carrier communication extension, and the monitoring diagnosis module and the indoor carrier communication extension are connected through a signal cable.

[0018] Compared with the prior art, the utility model has the following beneficial technical effects:

[0019] The utility model discloses a kind of self-monitoring current limiting transformers, which is composed of current limiting transformer body and self-monitoring equipment, and the current limiting transformer with monitoring function is formed by integrated design, for centralized 25 week phase-sensitive track circuit, by real-time acquisition of indoor side and rail side current of trackside current limiting transformer equipment, mixed signal is analyzed and extracted by monitoring diagnosis module, basic operation data of track circuit is collected, auxiliary traction unbalanced current, rail insulating section insulation damage, broken rail and adjacent line interference fault analysis and fault positioning are facilitated;Self-monitoring equipment is composed of monitoring diagnosis module and current sensor, all components are integrally designed, integrated in current limiting transformer box, field wiring is reduced, installation operation environment is simple, and later operation and maintenance workload is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0020] The drawings described herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes and proportions of the components in the drawings are only illustrative and are used to help understand the present application, and are not specific limitations on the shapes and proportions of the components. In the drawings:

[0021] Figure 1 It is an electrical schematic diagram of the self-monitoring current limiting transformer of the utility model.

[0022] Figure 2 It is a monitoring diagnosis module structure diagram of the self-monitoring current limiting transformer of the utility model.

[0023] Figure 3 It is an interface diagram of the monitoring diagnosis module of the self-monitoring current limiting transformer of the utility model.

[0024] Figure 4 It is a double-head current sensor structure diagram of the self-monitoring current limiting transformer of the utility model. DETAILED DESCRIPTION

[0025] For the person skilled in the art to better understand the technical scheme of the present application, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor should belong to the protection scope of the present application.

[0026] It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or there can be intervening elements. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can be present. The terms "vertical", "horizontal", "left", "right", and the like as used herein are used for illustration only and are not intended to be limiting.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0028] It should be noted that the terms "first", "second", and the like, used in the description and in the claims of the present application as well as above-mentioned drawings signify that the objects to which they apply are distinguished in the description. The signs must not necessarily be interpreted to signify relative or chronological priority or sequence. It is to be understood that the terms so used are interchangeable under appropriate circumstances and are merely used to differentiate one embodiment of the application from another. Furthermore, the terms "comprise", "have" and any variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of steps or units are not necessarily limited to those steps or units but can include other not expressly listed steps or units, or additional steps or units inherent to such process, method, article, or apparatus.

[0029] Embodiment one

[0030] Referring to Figure 1 and Figure 3The utility model provides a kind of self-monitoring current limiting transformer, including current limiting transformer body and self-monitoring device, self-monitoring device is installed on current limiting transformer body, current limiting transformer body and self-monitoring device are integrally arranged in the box of current limiting transformer, current limiting transformer body includes traction coil and signal coil, traction coil is oppositely arranged with signal coil, self-monitoring device includes monitoring diagnosis module and current sensor, monitoring diagnosis module is connected with current sensor, current sensor includes single-head sensor and double-head sensor, single-head sensor is connected with signal coil, double-head sensor is connected with traction coil.

[0031] The utility model integrates the current limiting transformer body and the self-monitoring device and arranges them in the box of the current limiting transformer, so that the whole device is more compact and occupies less space, which is conducive to installing more devices in limited space and improves the space utilization. The traditional current limiting transformer maintenance needs regular manual inspection and maintenance, which is time-consuming and laborious, and there is a risk of missing inspection. The use of self-monitoring device can realize real-time monitoring and data collection of the current limiting transformer, greatly reducing the frequency of manual intervention and maintenance, thereby saving maintenance cost.

[0032] The utility model uses the self-monitoring device to monitor the running state of the current limiting transformer in real time, and can immediately handle abnormal conditions, thereby avoiding power failure and other accidents caused by current limiting transformer failure and improving the operation reliability of the power system. In addition, the self-monitoring device can monitor the current, voltage, temperature, humidity and other key parameters of the current limiting transformer in real time, so as to timely find abnormal conditions and avoid safety hazards such as overload and short circuit of the current limiting transformer. Therefore, the self-monitoring current limiting transformer provided by the utility model can adapt to different working environments and conditions, such as electrified railway section and four-line parallel section, and provides a strong guarantee for the safe operation of electrified railway.

[0033] The current limiting transformer body further includes a core and a resonance matcher, the core is arranged between the traction coil and the signal coil, and the resonance matcher is connected with the signal coil. The resonance matcher adopts a 50Hz series resonance circuit, and a 25Hz parallel resonance circuit is adopted between the resonance matcher and the signal coil.

[0034] The utility model can provide the transmission characteristics of the current limiting transformer through the resonance relationship between the resonance matcher and the signal coil. The current sensor is used to collect the current of the traction coil and the signal coil, realize fault diagnosis of the device, check the broken wire of the current limiting transformer steel rail connection line, and monitor the traction current flowing through the traction coil, perform traction backflow monitoring and analysis, and provide convenience for on-site management and maintenance.

[0035] The current sensor adopts a closed current transformer, and one single-head sensor is provided, as shown in Figure 3Two double-head sensors are arranged. The single-head sensor is arranged on the panel of the resonance matcher. The double-head sensor is arranged on the traction bolt of the choke transformer.

[0036] Referring to Figure 2 The monitoring and diagnosing module comprises a PLC and an AC220V isolation conditioning circuit, an ADC acquisition circuit, a configuration serial port circuit, and a PLC and CPU master control module. The input end of the ADC acquisition circuit is connected to the current signal output end of the current sensor. The output end of the ADC acquisition circuit is connected to the input end of the PLC and CPU master control module. The output end of the PLC and CPU master control module is connected to the input end of the PLC and AC220V isolation conditioning circuit. The output end of the PLC and AC220V isolation conditioning circuit is connected to the indoor equipment. The PLC and AC220V isolation conditioning circuit is connected to the configuration serial port through the configuration serial port circuit.

[0037] The monitoring and diagnosing module is arranged on the core pressing plate of the choke transformer. The monitoring and diagnosing module adopts PLC power line carrier communication technology. The monitoring and diagnosing module is connected to the indoor carrier communication extension. The monitoring and diagnosing module and the indoor carrier communication extension are connected through a signal cable.

[0038] Embodiment Two

[0039] Referring to Figure 1 , Figure 2 and Figure 3 A self-monitoring choke transformer for centralized 25-phase-sensitive track circuit, which comprises a choke transformer body and a self-monitoring device. The choke transformer body comprises a traction coil, a signal coil, a core, and a resonance matcher. The self-monitoring device comprises a monitoring and diagnosing module and a current sensor. The current sensor, the monitoring and diagnosing module, and the choke transformer body are integrated into an integrated track circuit trackside signal connection device.

[0040] The choke transformer body comprises a traction coil, a signal coil, a core, and a resonance matcher. The resonance matcher is a 50Hz series resonance circuit, which is used to filter out external 50Hz traction current interference. The resonance matcher and the signal coil form a 25Hz parallel resonance circuit, which is used to improve the transmission characteristics of the track circuit.

[0041] The self-monitoring device comprises a monitoring and diagnosing module and a current sensor. The current sensor comprises one single-head sensor and two double-head sensors. Referring to Figure 4The single-head sensor is installed on the resonance matching panel of the current transformer for collecting the current on the indoor side of the sending end or receiving end; the double-head sensor is installed on the traction bolt of the current transformer for collecting the current of the rail lead-in line; the monitoring and diagnosing module is installed on the core pressing plate of the current transformer for receiving the current signals collected by the current sensor in real time, and sending the signals to the indoor equipment after operation, i.e. transmitting to the indoor carrier communication extension by the power line carrier communication technology. The current transformer body is used as the track circuit transmission equipment, and is used as the monitoring and collecting node object, and is used as the carrier for the integrated installation of the monitoring and diagnosing module and the current sensor.

[0042] The current sensor adopts the closed current transformer, the extension fire-retardant shielding line with the waterproof joint, and is connected to the monitoring and diagnosing module; the rated value of the single-head sensor is 0.6 A, and one-way current on the indoor side of the sending end or receiving end is collected; the rated value of the double-head sensor is 30 A, and two-way current of the rail lead-in line on the rail side is collected, and four-way current of the rail lead-in line is collected by two double-head sensors.

[0043] The frequency of the current collection includes 25 Hz, 50 Hz, 1700 Hz, 2000 Hz, 2300 Hz and 2600 Hz, and is respectively used for the 25 Hz phase-sensitive track circuit signal, the traction return current and the coded signal monitoring.

[0044] The monitoring and diagnosing module includes the PLC and the AC220V isolation conditioning circuit, the ADC collection circuit, the serial port circuit and the PLC and CPU main control module, and is used for collecting the current on the rail side and the indoor side of the current transformer, and monitoring the working state of the current transformer. The monitoring and diagnosing module receives the current signals collected by the current sensor through the AD collection interface of the ADC collection circuit, and after operation by the PLC and CPU main control module, the signals are conditioned by the PLC and AC220V isolation conditioning circuit, and are sent back to the indoor equipment by two cables. The monitoring and diagnosing module can collect and operate the signals of 25 Hz, 50 Hz, 1700 Hz, 2000 Hz, 2300 Hz and 2600 Hz, and adopts the PLC power line carrier communication technology to transmit the collected and operated data to the indoor carrier communication extension through the railway signal cable.

[0045] Many embodiments and many applications other than those provided in the foregoing examples will be apparent from consideration of the foregoing description with reference to the accompanying drawings. It is therefore contemplated to cover by the present teachings any and all modifications, variations, combinations or equivalents that fall within the scope of the present teachings. Accordingly, the scope of the present teachings should be determined not with reference to the above description, but should be given to broadest interpretation consistent with the present claims and the practices of those skilled in the art. For purposes of completeness, all articles and references including patents and patent documents are incorporated herein by reference. The disclosure of any publication herein is for the purpose of presenting the combined teachings of the present teachings and the publications and is not an admission that any of the publications or documents is prior art.

[0046] The above is a further detailed description of the present application, which cannot be deemed to limit the specific embodiments of the present application to the above. For ordinary skilled persons in the technical field to which the present application belongs, without departing from the concept of the present application, a number of simple deductions or substitutions can be made, which shall be deemed to belong to the scope of protection of the present application determined by the submitted claims.

Claims

1. A self-monitoring current limiting transformer, characterized by The utility model relates to a self-monitoring device and a rectifier transformer body, the rectifier transformer body and the self-monitoring device are integrated and arranged in the box of the rectifier transformer, the rectifier transformer body includes a traction coil and a signal coil, the traction coil and the signal coil are arranged oppositely, the self-monitoring device includes a monitoring and diagnosing module and a current sensor, the monitoring and diagnosing module is connected with the current sensor, the current sensor includes a single-head sensor and a double-head sensor, the single-head sensor is connected with the signal coil, and the double-head sensor is connected with the traction coil.

2. A self-monitoring current limiting transformer according to claim 1, characterized in that The rectifier transformer body further includes a core arranged between the traction coil and the signal coil.

3. A self-monitoring current limiting transformer according to claim 1, characterized in that The rectifier transformer body further includes a resonance matcher connected with the signal coil.

4. A self-monitoring current limiting transformer according to claim 3, characterised in that, The resonance matcher adopts a 50Hz series resonance circuit, and a 25Hz parallel resonance circuit is adopted between the resonance matcher and the signal coil.

5. A self-monitoring current limiting transformer according to claim 4, characterised in that, The single-head sensor is mounted on a panel of the resonance matcher.

6. A self-monitoring current limiting transformer according to claim 4, wherein, The double-head sensor is mounted on a traction bolt of the rectifier transformer.

7. The self-monitoring current limiting transformer of claim 1, wherein, The current sensor adopts a closed current transformer, one single-head sensor is arranged, and two double-head sensors are arranged.

8. The self-monitoring current limiting transformer of claim 1, wherein, The monitoring and diagnosing module includes a PLC and an AC220V isolation conditioning circuit, an ADC acquisition circuit, a configuration serial port circuit and a PLC and CPU main control module, the input end of the ADC acquisition circuit is connected with the current signal output end of the current sensor, the output end of the ADC acquisition circuit is connected with the input end of the PLC and CPU main control module, the output end of the PLC and CPU main control module is connected with the input end of the PLC and AC220V isolation conditioning circuit, the output end of the PLC and AC220V isolation conditioning circuit is connected with indoor equipment, and the PLC and AC220V isolation conditioning circuit is connected with a configuration serial port through the configuration serial port circuit.

9. The self-monitoring current limiting transformer of claim 1, wherein, The monitoring and diagnosing module is mounted on a core pressing plate of the rectifier transformer.

10. The self-monitoring current limiting transformer of claim 1, wherein, The monitoring and diagnosing module adopts a PLC power line carrier communication technology, the monitoring and diagnosing module is connected with an indoor carrier communication extension, and the monitoring and diagnosing module and the indoor carrier communication extension are connected through a signal cable.

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