WO2016119510A1 - 基于列车供电系统的弓网电弧的检测方法及系统 - Google Patents

基于列车供电系统的弓网电弧的检测方法及系统 Download PDF

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Publication number
WO2016119510A1
WO2016119510A1 PCT/CN2015/094565 CN2015094565W WO2016119510A1 WO 2016119510 A1 WO2016119510 A1 WO 2016119510A1 CN 2015094565 W CN2015094565 W CN 2015094565W WO 2016119510 A1 WO2016119510 A1 WO 2016119510A1
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Prior art keywords
pantograph
transformer
arc
gap
high voltage
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Ceased
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PCT/CN2015/094565
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English (en)
French (fr)
Inventor
贾步超
焦京海
侯方东
由建宏
于治国
周海军
杨盼奎
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CRRC Qingdao Sifang Co Ltd
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CRRC Qingdao Sifang Co Ltd
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Priority to US15/504,976 priority Critical patent/US10416222B2/en
Priority to GB1702674.1A priority patent/GB2543715B/en
Publication of WO2016119510A1 publication Critical patent/WO2016119510A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L5/00—Current collectors for power supply lines of electrically-propelled vehicles
    • B60L5/18—Current collectors for power supply lines of electrically-propelled vehicles using bow-type collectors in contact with trolley wire
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L9/00—Electric propulsion with power supply external to the vehicle
    • B60L9/02—Electric propulsion with power supply external to the vehicle using DC motors
    • B60L9/08—Electric propulsion with power supply external to the vehicle using DC motors fed from AC supply lines
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/005—Testing of electric installations on transport means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
    • G01R31/14—Circuits therefor, e.g. for generating test voltages, sensing circuits
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/40—Testing power supplies
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/005—Testing of electric installations on transport means
    • G01R31/008—Testing of electric installations on transport means on air- or spacecraft, railway rolling stock or sea-going vessels

Definitions

  • the present invention relates to the field of trains, and in particular to a method and system for detecting a bow grid arc based on a train power supply system.
  • the existing arc grid arc test method has the following drawbacks: First, when a conventional high voltage and high current power source is used, a power supply of several megawatts is required, and according to the needs of the test, the grid end needs Frequent input and cutoff of several megawatts of power can easily cause instability in the power supply system. Second, when using a low-voltage, high-current or high-voltage, low-current solution, there is a certain difference between the high-voltage and high-current conditions between the actual on-site bow gap. Thirdly, the capacitor energy storage is used to conduct the arc wire arc test through the inductor discharge. Since the discharge loop resistance is difficult to reduce, the generated voltage and current are rapidly attenuated in an exponential manner, which is difficult to meet the needs of the arc wire arc test.
  • the main object of the present invention is to provide a method and a system for detecting a bow grid arc based on a train power supply system, in order to solve the method of the bow grid arc simulation test in the prior art, in order to generate a high voltage and a large current in the bow gap,
  • the use of a high voltage AC voltage source to supply power results in technical problems of high energy consumption.
  • a method for detecting a bow grid arc based on a train power supply system includes: a power grid and a step-up transformer, a current limiting resistor, a step-down transformer, a contact network conductor, and a discharge loop formed by a pantograph.
  • the detection method includes: the step-up transformer boosts the alternating current delivered by the power grid to generate a high voltage. Electrical energy, wherein high voltage electrical energy causes high voltage and large current to be generated between the contact wire and the pantograph in the discharge circuit; the gap between the collecting contact wire and the pantograph is generated under high voltage and high current conditions. The arc.
  • a detection system for a bow grid arc based on a train power supply system comprises: a power grid for transmitting electrical energy; a discharge circuit comprising: a step-up transformer, a current limiting resistor, a contact network conductor, a pantograph, wherein the step-up transformer is used to boost the alternating current delivered by the power grid to generate high-voltage electric energy.
  • the high voltage electrical energy causes a high voltage and a large current to be generated between the contact wire conductor and the pantograph in the discharge circuit;
  • the collecting device is configured to collect the gap between the contact wire conductor and the pantograph at a high voltage and a large current The arc generated under the condition.
  • a step-up transformer is used to boost the alternating current delivered by the power grid to generate high-voltage electric energy, wherein the high-voltage electric energy causes a high voltage and a large current to generate a gap between the contact net wire and the pantograph in the discharge circuit;
  • the method for contacting an arc generated by a gap between a wire conductor and a pantograph under high voltage and a large current condition solves the method of the existing arc wire arc simulation test, in order to generate a high voltage and a large current in the gap of the arch net.
  • the use of a high-voltage AC voltage source to supply power results in technical problems of high energy consumption.
  • FIG. 1 is a schematic diagram of a train power supply system according to a first embodiment of the present invention
  • FIG. 2 is a flow chart of a method for detecting a bow grid arc based on a train power supply system according to a first embodiment of the present invention
  • FIG. 3 is a schematic diagram of a detection system of a bow grid arc based on a train power supply system according to a second embodiment of the present invention.
  • Embodiments of the present invention provide a method for detecting a bow grid arc based on a train power supply system.
  • the power supply system may include a power grid 10 and a step-up transformer 20, a current limiting resistor 30, a step-down transformer 40, a contact network conductor 50, and a discharge circuit formed by the pantograph 60.
  • the method may include the following steps:
  • Step S22 the step-up transformer boosts the alternating current delivered by the power grid to generate high-voltage electric energy, wherein the high-voltage electric energy causes a high voltage and a large current to be generated in a gap between the contact net wire and the pantograph in the discharge circuit.
  • the step-up transformer can transmit the high-voltage power after the boosting to the discharge circuit, that is, the step-up transformer 20, the current limiting resistor 30, the step-down transformer 40, the contact wire 50, and the pantograph.
  • the discharge circuit formed by 60 generates a high voltage and a large current in the gap between the catenary wire 50 and the pantograph 60 in the discharge circuit.
  • step S24 an arc generated by the gap between the contact wire and the pantograph under high voltage and high current is collected.
  • an arc generated by the gap between the catenary wire and the pantograph under high voltage and high current can be collected for Further research.
  • the arc generated by the bow (pantograph and catenary) is generated under the conditions of high voltage and high current in the gap between the pantograph and the catenary. Therefore, the arc generated in the gap of the arch through the above steps satisfies the need to study the arc of the arch, and can truly reflect the characteristics of the arc of the net.
  • the power delivered by the power grid is boosted by the step-up transformer, and the high-voltage power is transmitted to the discharge circuit, so that a high voltage and a large current are generated in the gap between the contact wire and the pantograph in the discharge circuit, and finally the bow is collected.
  • the arc gap generated by the above-mentioned high voltage and high current conditions in the grid gap satisfies the requirement of high voltage in the gap of the grid and high current after the high voltage, and the power demand on the input end of the grid is reduced to less than 50 kilowatts, thereby avoiding the grid.
  • the requirement of transient megawatt input power solves the existing method of arc network arc simulation test, in order to make the bow gap high. Voltage, high current, and high-voltage AC voltage source are used to supply power, resulting in technical problems of high energy consumption.
  • step S22 after the step-up transformer boosts the AC power delivered by the power grid to generate high-voltage power, the method provided in this embodiment may further include:
  • step S23 the step-down transformer steps down the high voltage power and sends it to the step-up transformer.
  • the output end of the step-down transformer 40 can be connected to the input end of the step-up transformer 20 to form an energy feedback system, so that the high-voltage power can be re-entered into the step-up transformer 20, which is reduced.
  • the consumption of electric energy, and the above method has low energy consumption, high stability and high reliability to the power source.
  • the step-down transformer can adopt a ratio of 1:125 and a capacity of 60KVA.
  • the step of generating high voltage and a large current in the gap between the catenary wire and the pantograph in the discharge circuit by the high voltage electric energy in step S22 may include:
  • step S221 after the gap between the contact net wire and the pantograph is broken by the high voltage electric energy, the discharge circuit is turned on, and a high current electric energy of a large current is generated.
  • two-phase alternating current can be connected to the input end of the step-up transformer 20 via the power grid 10, the output end of the step-up transformer 20, the current limiting resistor 30, the input end of the step-down transformer 40, and the contact.
  • the wire lead 50 and the pantograph 60 form a discharge loop. Before the bow gap is not broken, there is no current in the discharge loop, and the step-down transformer 40 does not work. After the bow gap is broken down, the discharge loop forms a current, that is, a large High voltage electrical energy for current.
  • the energy output by the step-up transformer 20 is fed back to the input of the step-up transformer 20 via the step-down transformer 40 to ensure safe operation of the grid system.
  • step S24 the step of collecting an arc generated by a gap between the contact wire and the pantograph under high voltage and high current conditions may include:
  • step S241 a coupling vibration is generated between the contact wire and the pantograph and is taken offline.
  • a coupling vibration can be generated between the contact net and the pantograph to simulate the motion state between the contact wire and the pantograph during real operation of the train, when the contact wire and the pantograph are coupled.
  • the vibration is intensified, the electrical contact state of the contact wire and the pantograph will be seriously deteriorated and cause offline.
  • Step S242 collecting an arc generated when the gap between the contact wire and the pantograph is offline.
  • step S242 collecting a gap between the contact wire and the pantograph is produced offline.
  • the step of generating an electric arc can include:
  • step S2421 the image capturing device captures an image between the generation and the extinction of the arc.
  • an image capturing device can be used to capture an image of the arc of the arc from the generation to the extinction, and the arcing, annihilation, and re-ignition time of the arc of the arc is analyzed, thereby manufacturing and running the train.
  • an image capturing device can be used to capture an image of the arc of the arc from the generation to the extinction, and the arcing, annihilation, and re-ignition time of the arc of the arc is analyzed, thereby manufacturing and running the train.
  • the embodiment can also provide a high voltage and high current arc network arc test power supply device.
  • the device can include: a power grid 10, a step-up transformer 20, a current limiting resistor 30, a step-down transformer 40, and a contact network conductor 50.
  • the pantograph 60; the two-phase alternating current is connected to the input end of the step-up transformer 20 via the power grid 10, the output end of the step-up transformer 20, the current limiting resistor 30, the input end of the step-down transformer 40, the contact network conductor 50, and the power receiving
  • the bow 60 constitutes a discharge loop.
  • the discharge loop forms a current, and the energy outputted by the step-up transformer 20 is fed back to the input end of the step-up transformer 20 through the step-down transformer 40, thereby ensuring the safe operation of the grid system.
  • the above power supply device can be used to perform the method of the first embodiment.
  • a step-up transformer and a step-down transformer can be used respectively to replace the high-voltage AC voltage source and connected into a push-pull structure.
  • the output of the step-up transformer is connected to the input end of the step-down transformer, and the step-down transformer is connected.
  • the output end is connected to the input end of the step-up transformer, and the contact net wire is connected with the pantograph slide plate (referred to as the bow net) at both ends of the riser transformer.
  • the output of the step-up transformer is The energy is fed back to the input end of the step-up transformer through the step-down transformer to provide a large current after the breakdown of the bow gap.
  • the method satisfies the requirements of the high voltage of the bow gap and the high current after the high voltage, and reduces the power requirement of the input end of the grid to less than 50 kilowatts, thereby avoiding the requirement of several megawatts of input power to the grid transient.
  • the working process of the above device is: two-phase alternating current is connected to the input end of the step-up transformer 20 via the power grid 10, the output end of the step-up transformer 20, the current limiting resistor 30, the input end of the step-down transformer 40, and the contact network.
  • the wire 50 and the pantograph 60 constitute a discharge circuit.
  • the step-down transformer 40 does not work; after the bow gap breaks down, the discharge circuit forms a current, and the step-up transformer 20
  • the output energy is fed back to the input of the step-up transformer 20 through the step-down transformer 40 to ensure safe operation of the grid system.
  • the application adopts a push-pull structure of a step-up and step-down transformer, and realizes feedback control of electric energy.
  • System has the following positive effects: the output current is stable, can truly reflect the characteristics of the arc of the arc; the power supply has low energy consumption, strong stability and high reliability.
  • the application is directed to the characteristics of the arc wire arc, and the arc test power supply device provides little influence on the power supply grid, low energy consumption, and stable power supply waveform.
  • Embodiments of the present invention provide a detection system for a bow grid arc based on a train power supply system. As shown in Figure 3, the system can include:
  • the grid 10 is used to deliver electrical energy.
  • the discharge circuit 70 includes: a step-up transformer 20, a current limiting resistor 30, a contact network wire 50, and a pantograph 60.
  • the step-up transformer 20 is used to boost the alternating current delivered by the power grid to generate high-voltage power, wherein the high-voltage power
  • the gap between the catenary wire 50 and the pantograph 60 in the discharge circuit is caused to generate a high voltage and a large current.
  • the collecting device 80 is configured to collect an arc generated by a gap between the contact wire and the pantograph under conditions of high voltage and high current.
  • the step-up transformer can transmit the high-voltage electric energy after the boosting to the discharge circuit, that is, the step-up transformer 20, the current limiting resistor 30, the step-down transformer 40, the contact net wire 50, and the discharge circuit formed by the pantograph 60.
  • the high voltage and large current are generated in the gap between the catenary wire 50 and the pantograph 60 in the discharge circuit, and after the arc is generated by the bow (pantograph and catenary), the catenary wire and the pantograph can be collected.
  • the arc between the high voltage and high current conditions between the gaps is used for further research.
  • the arc generated by the bow (pantograph and catenary) is generated under the conditions of high voltage and high current in the gap between the pantograph and the catenary. Therefore, the arc generated in the gap of the arch through the above steps satisfies the need to study the arc of the arch, and can truly reflect the characteristics of the arc of the net.
  • the power delivered by the power grid is boosted by the step-up transformer, and the high-voltage power is transmitted to the discharge circuit, so that a high voltage and a large current are generated in the gap between the contact wire and the pantograph in the discharge circuit, and finally the bow is collected.
  • the arc gap generated by the above-mentioned high voltage and high current conditions in the grid gap satisfies the requirement of high voltage in the gap of the grid and high current after the high voltage, and the power demand on the input end of the grid is reduced to less than 50 kilowatts, thereby avoiding the grid.
  • the requirement of transient megawatt input power solves the existing method of arc network arc simulation test, in order to make the bow gap high. Voltage, high current, and high-voltage AC voltage source are used to supply power, resulting in technical problems of high energy consumption.
  • the discharge circuit 70 may further include:
  • the step-down transformer is connected to the current limiting resistor and the pantograph and is used for the high voltage power to be stepped down and sent to the step-up transformer.
  • the output end of the step-down transformer can be connected to the input end of the step-up transformer to form an energy feedback system, so that the high-voltage power can be re-inputted to the step-up transformer, reducing the power consumption.
  • the step-down transformer can adopt a ratio of 1:125 and a capacity of 60KVA.
  • the collecting device 80 may further include:
  • the vibration device 801 is configured to generate a coupling vibration between the contact wire and the pantograph and to go offline.
  • a coupling vibration can be generated between the contact net and the pantograph to simulate the motion state between the contact wire and the pantograph during real operation of the train, when the contact wire and the pantograph are coupled.
  • the vibration is intensified, the electrical contact state of the contact wire and the pantograph will be seriously deteriorated and cause offline.
  • the collector 802 is configured to collect an arc generated when the gap between the contact wire and the pantograph is offline.
  • the collector is an imaging device
  • the imaging device is used to capture an image between the generation and the extinction of the arc.
  • an image capturing device can be used to capture an image of the arc of the arc from the generation to the extinction, and the arcing, annihilation, and re-ignition time of the arc of the arc is analyzed, thereby manufacturing and running the train.
  • an image capturing device can be used to capture an image of the arc of the arc from the generation to the extinction, and the arcing, annihilation, and re-ignition time of the arc of the arc is analyzed, thereby manufacturing and running the train.
  • an image capturing device can be used to capture an image of the arc of the arc from the generation to the extinction, and the arcing, annihilation, and re-ignition time of the arc of the arc is analyzed, thereby manufacturing and running the train.
  • an image capturing device can be used to capture an image of the arc of the arc from the generation to the extinction, and the arcing, annihilation, and re-ignition time of the arc of the arc is analyzed, thereby manufacturing and running the train.
  • the arc wire arc detection system can boost the AC power delivered by the grid 10 using a step-up transformer having a ratio of 1:125 and a capacity of 60 KVA.
  • the embodiment can also provide a high voltage and high current arc network arc test power supply device.
  • the device can include: a power grid 10, a step-up transformer 20, a current limiting resistor 30, and a step-down transformer. 40.
  • the contact network wire 50 and the pantograph 60; the two-phase alternating current is connected to the input end of the step-up transformer 20 via the power grid 10, the output end of the step-up transformer 20, the current limiting resistor 30, the input end of the step-down transformer 40, and the contact
  • the wire lead 50 and the pantograph 60 form a discharge loop. After the breakage of the bow grid, the discharge loop forms a current, and the energy outputted by the step-up transformer 20 is fed back to the input end of the step-up transformer 20 through the step-down transformer 40, thereby ensuring the grid system. Safe to run.
  • a step-up transformer and a step-down transformer can be used respectively to replace the high-voltage AC voltage source and connected into a push-pull structure.
  • the output of the step-up transformer is connected to the input end of the step-down transformer, and the step-down transformer is connected.
  • the output end is connected to the input end of the step-up transformer, and the contact net wire is connected with the pantograph slide plate (referred to as the bow net) at both ends of the riser transformer.
  • the output of the step-up transformer is The energy is fed back to the input end of the step-up transformer through the step-down transformer to provide a large current after the breakdown of the bow gap.
  • the method satisfies the requirements of the high voltage of the bow gap and the high current after the high voltage, and reduces the power requirement of the input end of the grid to less than 50 kilowatts, thereby avoiding the requirement of several megawatts of input power to the grid transient.
  • the working process of the above components is: two-phase alternating current is connected to the input end of the step-up transformer 20 via the power grid 10, the output end of the step-up transformer 20, the current limiting resistor 30, the input end of the step-down transformer 40, and the contact network.
  • the wire 50 and the pantograph 60 constitute a discharge circuit.
  • the step-down transformer 40 does not work; after the bow gap breaks down, the discharge circuit forms a current, and the step-up transformer 20
  • the output energy is fed back to the input of the step-up transformer 20 through the step-down transformer 40 to ensure safe operation of the grid system.
  • the application adopts the push-pull structure of the ascending and descending transformers and realizes the feedback control of the electric energy, and has the following positive effects: the output current is stable, and can truly reflect the characteristics of the arc of the net; the power consumption is low, the stability is strong, High reliability.
  • the application is directed to the characteristics of the arc wire arc, and the arc test power supply device provides little influence on the power supply grid, low energy consumption, and stable power supply waveform.
  • the disclosed apparatus may be implemented in other ways.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or may be Integrate into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be electrical or otherwise.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium.
  • the technical solution of the present invention which is essential or contributes to the prior art, or all or part of the technical solution, may be embodied in the form of a software product stored in a storage medium.
  • a number of instructions are included to cause a computer device (which may be a personal computer, mobile terminal, server or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a U disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic disk, or an optical disk, and the like. .

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Abstract

一种基于列车供电系统的弓网电弧的检测方法及系统。其中，基于列车供电系统的弓网电弧的检测方法包括：升压变压器（20）将电网（10）输送的将交流电升压，产生高压电能，其中，高压电能使放电回路中的接触网导线（50）和受电弓（60）之间的间隙产生高电压和大电流（S22）；采集接触网导线（50）和受电弓（60）之间的间隙在高压和大电流的状况下产生的电弧（S24），以解决现有技术中弓网电弧模拟试验的方法中，为使弓网间隙产生高电压、大电流，采用高压交流电压源来供电，导致耗能大的技术问题。

Description

基于列车供电系统的弓网电弧的检测方法及系统
本申请要求于2015年01月27日提交中国专利局、申请号为201510041675.5、发明名称为“基于列车供电系统的弓网电弧的检测方法及系统”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及列车领域，具体而言，涉及一种基于列车供电系统的弓网电弧的检测方法及系统。
背景技术
近年来，高速铁路飞速发展，高速列车获得电能的原理为：通过接触网导线与受电弓滑板滑动接触，从接触网上获取电能。但随着列车运行速度的提高，在接触网和受电弓接触的过程中，耦合振动加剧，使得受电弓与接触网的电接触状态严重恶化，导致弓网(受电弓与接触网)离线频频发生，而离线时产生的弓网电弧使接触网导线和受电弓滑板严重烧蚀，对高速铁路行车安全带来巨大威胁，已成为制约我国高速铁路进一步发展的技术瓶颈。因此，亟需对弓网电弧的特性进行系统深入的研究。在实际运行的高速列车上，由于现场条件、设备安装空间等因素的限制，使得现场测试弓网电弧的性能参数存在很大的困难。现有技术往往采用模拟试验系统来研究弓网电弧的特性。在检测弓网电弧的模拟试验中，如何提供高电压大电流的条件是弓网电弧试验的关键。
这里需要说明的是，目前，现有的弓网电弧试验方法存在如下缺陷：第一，当采用传统高电压大电流电源时，需要数兆瓦级的电源，而且根据试验的需要，电网端需要频繁的输入和切断数兆瓦的功率，容易造成供电系统不稳定。第二，当采用低电压大电流或高电压小电流的方案时，与实际现场弓网间隙间高电压大电流工况存在一定的差异。第三，采用电容器储能，通过电感放电来进行弓网电弧试验，由于放电回路电阻难以降低，因此产生的电压电流以指数形式迅速衰减，难以满足弓网电弧试验的需要。
针对现有技术中弓网电弧模拟试验的方法中，为使弓网间隙产生高电 压、大电流，采用高压交流电压源来供电，导致耗能大的技术问题，目前尚未提出有效的解决方案
发明内容
本发明的主要目的在于提供一种基于列车供电系统的弓网电弧的检测方法及系统，以解决现有技术中弓网电弧模拟试验的方法中，为使弓网间隙产生高电压、大电流，采用高压交流电压源来供电，导致耗能大的技术问题。
为了实现上述目的，根据本发明实施例的一个方面，提供了一种基于列车供电系统的弓网电弧的检测方法。其中列车供电系统包括：电网以及升压变压器、限流电阻、降压变压器、接触网导线、受电弓构成的放电回路，该检测方法包括：升压变压器将电网输送的交流电升压，产生高压电能，其中，高压电能使放电回路中的接触网导线和受电弓之间的间隙产生高电压和大电流；采集接触网导线和受电弓之间的间隙在高压和大电流的状况下产生的电弧。
为了实现上述目的，根据本发明实施例的另一方面，提供了一种基于列车供电系统的弓网电弧的检测系统。该系统包括：电网，用于输送电能；放电回路，包括：升压变压器、限流电阻、接触网导线、受电弓，其中，升压变压器用于将电网输送的交流电升压，产生高压电能，其中，高压电能使放电回路中的接触网导线和受电弓之间的间隙产生高电压和大电流；采集设备，用于采集接触网导线和受电弓之间的间隙在高压和大电流的状况下产生的电弧。
根据本发明实施例，采用升压变压器将电网输送的交流电升压，产生高压电能，其中，高压电能使放电回路中的接触网导线和受电弓之间的间隙产生高电压和大电流；采集接触网导线和受电弓之间的间隙在高压和大电流的状况下产生的电弧的方法，解决了现有的弓网电弧模拟试验的方法中，为使弓网间隙产生高电压、大电流，采用高压交流电压源来供电，导致耗能大的技术问题。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据提供的附图获得其他的附图。
图1是根据本发明实施例一的列车供电系统的示意图；
图2是根据本发明实施例一的基于列车供电系统的弓网电弧的检测方法的流程图；以及
图3是根据本发明实施例二的基于列车供电系统的弓网电弧的检测系统的示意图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。
为了使本技术领域的人员更好地理解本发明方案，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分的实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都应当属于本发明保护的范围。
需要说明的是，本发明的说明书和权利要求书及上述附图中的术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。应该理解这样使用的数据在适当情况下可以互换，以便这里描述的本发明的实施例。此外，术语“包括”和“具有”以及他们的任何变形，意图在于覆盖不排他的包含，例如，包含了一系列步骤或单元的过程、方法、系统、产品或设备不必限于清楚地列出的那些步骤或单元，而是可包 括没有清楚地列出的或对于这些过程、方法、产品或设备固有的其它步骤或单元。
实施例一
本发明实施例提供了一种基于列车供电系统的弓网电弧的检测方法。如图1所示，该供电系统可以包括：电网10以及升压变压器20、限流电阻30、降压变压器40、接触网导线50、受电弓60构成的放电回路。
如图2所示，该方法可以包括步骤如下：
步骤S22，升压变压器将电网输送的交流电升压，产生高压电能，其中，高压电能使放电回路中的接触网导线和受电弓之间的间隙产生高电压和大电流。
具体的，在本方案中，上述升压变压器可以将上述升压之后的高压电能输送至放电回路，即升压变压器20、限流电阻30、降压变压器40、接触网导线50、受电弓60构成的放电回路，使放电回路中的接触网导线50和受电弓60之间的间隙产生高电压和大电流。
步骤S24，采集接触网导线和受电弓之间的间隙在高压和大电流的状况下产生的电弧。
具体的，在本方案中，在弓网(受电弓和接触网)产生电弧之后，可以采集接触网导线和受电弓之间的间隙在高压和大电流的状况下产生的电弧，用于进一步的研究。
这里需要说明的是，在高速列车在实际的运行中，弓网(受电弓和接触网)产生的电弧是在受电弓和接触网之间的间隙在高电压和大电流的条件下产生的，因此通过上述步骤在弓网间隙产生的电弧满足了研究弓网电弧的需要，能够真实的反映弓网电弧的特性。
本实施例通过升压变压器将电网输送的电能升压，再将高压电能输送至放电回路，使放电回路中的接触网导线和受电弓之间的间隙产生高电压和大电流，最后采集弓网间隙在上述高电压和大电流状况下产生的电弧，本实施例满足了弓网间隙中高电压以及高电压过后大电流的要求，对电网输入端的功率需求降低到50千瓦以内，避免了对电网瞬态数兆瓦输入功率的要求，解决了现有的弓网电弧模拟试验的方法中，为使弓网间隙产生高 电压、大电流，采用高压交流电压源来供电，导致耗能大的技术问题。
可选地，步骤S22，在升压变压器将电网输送的交流电升压，产生高压电能之后，本实施例提供的方法还可以包括：
步骤S23，降压变压器将高压电能降压后，输送至升压变压器。
具体的，在本方案中，结合图1，可以使降压变压器40的输出端接到升压变压器20的输入端构成能量反馈系统，这样高压电能则可以重新输入到升压变压器20，降低了对电能的消耗，且上述方法对电源的能耗低、稳定性强、可靠性高。可选地，上述降压变压器可以采用变比为1:125，容量为60KVA。
可选地，步骤S22中的高压电能使放电回路中的接触网导线和受电弓之间的间隙产生高电压和大电流的步骤可以包括：
步骤S221，在接触网导线和受电弓之间的间隙被高压电能击穿后，放电回路导通，并产生大电流的高压电能。
这里需要说明的是，结合图1，可以采取两相交流电经电网10接入升压变压器20的输入端，升压变压器20的输出端、限流电阻30、降压变压器40的输入端、接触网导线50、受电弓60组成放电回路，在弓网间隙没有击穿以前，放电回路中没有电流，降压变压器40没有工作，在弓网间隙击穿以后，放电回路形成电流，即产生大电流的高压电能。
在一种可选地实施例中，升压变压器20输出的能量通过降压变压器40反馈回升压变压器20输入端，从而保证电网系统的安全运行。
可选地，步骤S24，采集接触网导线和受电弓之间的间隙在高压和大电流的状况下产生的电弧的步骤可以包括：
步骤S241，使接触网导线与受电弓之间产生耦合振动并离线。
具体的，在本方案中，可以使接触网与受电弓之间产生耦合振动以模拟列车在真实运行时接触网导线和受电弓之间的运动状态，当接触网导线和受电弓耦合振动加剧的时候，接触网导线和受电弓之的电接触状态会严重恶化导致离线。
步骤S242，采集接触网导线和受电弓之间的间隙在离线时产生的电弧。
可选地，步骤S242，采集接触网导线和受电弓之间的间隙在离线时产 生的电弧的步骤可以包括：
步骤S2421，使用摄像设备捕捉电弧从产生至熄灭之间的影像。
具体的，在本方案中，可以使用摄像设备来捕捉弓网电弧从产生至熄灭之间的影像，通过分析弓网电弧在燃弧、猝灭、重燃的时间，进而对列车的制造、运行提供策略。
下面结合具体场景对本申请进行描述：
本实施例还可以提供一种高电压大电流弓网电弧试验电源装置，结合图1，该装置可以包括：电网10、升压变压器20、限流电阻30、降压变压器40、接触网导线50、受电弓60；两相交流电经电网10接入升压变压器20的输入端，升压变压器20的输出端、限流电阻30、降压变压器40的输入端、接触网导线50、受电弓60组成放电回路，在弓网间隙击穿以后，放电回路形成电流，升压变压器20输出的能量通过降压变压器40反馈回升压变压器20输入端，从而保证电网系统的安全运行。这里需要说明的是，上述电源装置可以用于执行实施例一的方法。
本申请可以分别采用一台升压变压器和一台降压变压器来取代高压交流电压源，并将其连接成推挽式结构，升压变压器的输出端连接降压变压器的输入端，降压变压器的输出端接入升压变压器的输入端，接触网导线与受电弓滑板(简称弓网)连接在升变压器两端，当弓网之间的间隙被高压击穿时，升压变压器输出的能量通过降压变压器反馈回升压变压器输入端，给弓网间隙提供击穿后的大电流。通过该方法满足了弓网间隙高电压以及高电压过后大电流的要求，对电网输入端的功率需求降低到50千瓦以内，避免了对电网瞬态数兆瓦输入功率要求。
结合图1，上述装置的工作过程是：两相交流电经电网10接入升压变压器20的输入端，升压变压器20的输出端、限流电阻30、降压变压器40的输入端、接触网导线50、受电弓60组成放电回路，在弓网间隙没有击穿以前，放电回路中没有电流，降压变压器40没有工作；在弓网间隙击穿以后，放电回路形成电流，升压变压器20输出的能量通过降压变压器40反馈回升压变压器20输入端，从而保证电网系统的安全运行。
本申请由于采用升、降压变压器推挽式结构，并实现了电能的反馈控 制，具有如下积极效果：输出电流稳定，能够真实反映弓网电弧的特点；该电源能耗低、稳定性强、可靠性高。本申请针对弓网电弧的特点，提供的电弧试验电源装置对供电电网影响小、能耗低、供电波形稳定。
实施例二
本发明实施例提供了一种基于列车供电系统的弓网电弧的检测系统。如图3所示，该系统可以包括：
电网10，用于输送电能。
放电回路70，包括：升压变压器20、限流电阻30、接触网导线50、受电弓60，其中，升压变压器20用于将电网输送的交流电升压，产生高压电能，其中，高压电能使放电回路中的接触网导线50和受电弓60之间的间隙产生高电压和大电流。
采集设备80，用于采集接触网导线和受电弓之间的间隙在高电压和大电流的状况下产生的电弧。
具体的，上述升压变压器可以将上述升压之后的高压电能输送至放电回路，即升压变压器20、限流电阻30、降压变压器40、接触网导线50、受电弓60构成的放电回路，使放电回路中的接触网导线50和受电弓60之间的间隙产生高电压和大电流，在弓网(受电弓和接触网)产生电弧之后，可以采集接触网导线和受电弓之间的间隙在高压和大电流的状况下产生的电弧，用于进一步的研究。
这里需要说明的是，在高速列车在实际的运行中，弓网(受电弓和接触网)产生的电弧是在受电弓和接触网之间的间隙在高电压和大电流的条件下产生的，因此通过上述步骤在弓网间隙产生的电弧满足了研究弓网电弧的需要，能够真实的反映弓网电弧的特性。
本实施例通过升压变压器将电网输送的电能升压，再将高压电能输送至放电回路，使放电回路中的接触网导线和受电弓之间的间隙产生高电压和大电流，最后采集弓网间隙在上述高电压和大电流状况下产生的电弧，本实施例满足了弓网间隙中高电压以及高电压过后大电流的要求，对电网输入端的功率需求降低到50千瓦以内，避免了对电网瞬态数兆瓦输入功率的要求，解决了现有的弓网电弧模拟试验的方法中，为使弓网间隙产生高 电压、大电流，采用高压交流电压源来供电，导致耗能大的技术问题。
可选地，放电回路70还可以包括：
降压变压器，与限流电阻和受电弓相连接，用于高压电能降压后，输送至升压变压器。
具体的，在本方案中，结合图1，可以使降压变压器的输出端接到升压变压器的输入端构成能量反馈系统，这样高压电能则可以重新输入到升压变压器，降低了对电能的消耗，且上述方法对电源的能耗低、稳定性强、可靠性高。可选地，上述降压变压器可以采用变比为1:125,容量为60KVA。
可选地，采集设备80还可以包括：
振动装置801，用于使接触网导线与受电弓之间产生耦合振动并离线。
具体的，在本方案中，可以使接触网与受电弓之间产生耦合振动以模拟列车在真实运行时接触网导线和受电弓之间的运动状态，当接触网导线和受电弓耦合振动加剧的时候，接触网导线和受电弓之的电接触状态会严重恶化导致离线。
采集器802，用于采集接触网导线和受电弓之间的间隙在离线时产生的电弧。
可选地，在上述采集器为摄像设备的情况下，则采用上述摄像设备捕捉电弧从产生至熄灭之间的影像。
具体的，在本方案中，可以使用摄像设备来捕捉弓网电弧从产生至熄灭之间的影像，通过分析弓网电弧在燃弧、猝灭、重燃的时间，进而对列车的制造、运行提供策略。
具体的，在本方案中，可以使用摄像设备来捕捉弓网电弧从产生至熄灭之间的影像，通过分析弓网电弧在燃弧、猝灭、重燃的时间，进而对列车的制造、运行提供策略。
在一种可选地实施例中，弓网电弧的检测系统可以采用变比为1:125,容量为60KVA的升压变压器将电网10输送的交流电能进行升压。
下面结合具体场景对本申请进行描述：
本实施例还可以提供一种高电压大电流弓网电弧试验电源装置，结合图1，该装置可以包括：电网10、升压变压器20、限流电阻30、降压变压器 40、接触网导线50、受电弓60；两相交流电经电网10接入升压变压器20的输入端，升压变压器20的输出端、限流电阻30、降压变压器40的输入端、接触网导线50、受电弓60组成放电回路，在弓网间隙击穿以后，放电回路形成电流，升压变压器20输出的能量通过降压变压器40反馈回升压变压器20输入端，从而保证电网系统的安全运行。
本申请可以分别采用一台升压变压器和一台降压变压器来取代高压交流电压源，并将其连接成推挽式结构，升压变压器的输出端连接降压变压器的输入端，降压变压器的输出端接入升压变压器的输入端，接触网导线与受电弓滑板(简称弓网)连接在升变压器两端，当弓网之间的间隙被高压击穿时，升压变压器输出的能量通过降压变压器反馈回升压变压器输入端，给弓网间隙提供击穿后的大电流。通过该方法满足了弓网间隙高电压以及高电压过后大电流的要求，对电网输入端的功率需求降低到50千瓦以内，避免了对电网瞬态数兆瓦输入功率要求。
结合图1，上述各个部件的工作过程是：两相交流电经电网10接入升压变压器20的输入端，升压变压器20的输出端、限流电阻30降压变压器40的输入端、接触网导线50、受电弓60组成放电回路，在弓网间隙没有击穿以前，放电回路中没有电流，降压变压器40没有工作；在弓网间隙击穿以后，放电回路形成电流，升压变压器20输出的能量通过降压变压器40反馈回升压变压器20输入端，从而保证电网系统的安全运行。
本申请由于采用升、降压变压器推挽式结构，并实现了电能的反馈控制，具有如下积极效果：输出电流稳定，能够真实反映弓网电弧的特点；该电源能耗低、稳定性强、可靠性高。本申请针对弓网电弧的特点，提供的电弧试验电源装置对供电电网影响小、能耗低、供电波形稳定。
需要说明的是，对于前述的各方法实施例，为了简单描述，故将其都表述为一系列的动作组合，但是本领域技术人员应该知悉，本发明并不受所描述的动作顺序的限制，因为依据本发明，某些步骤可以采用其他顺序或者同时进行。其次，本领域技术人员也应该知悉，说明书中所描述的实施例均属于优选实施例，所涉及的动作和模块并不一定是本发明所必须的。
在上述实施例中，对各个实施例的描述都各有侧重，某个实施例中没 有详述的部分，可以参见其他实施例的相关描述。
在本申请所提供的几个实施例中，应该理解到，所揭露的装置，可通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本发明各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本发明的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使一台计算机设备(可为个人计算机、移动终端、服务器或者网络设备等)执行本发明各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、移动硬盘、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (10)

  1. 一种基于列车供电系统的弓网电弧的检测方法，其特征在于，所述列车供电系统包括：电网以及升压变压器、限流电阻、降压变压器、接触网导线、受电弓构成的放电回路，其中，所述检测方法包括：
    所述升压变压器将所述电网输送的交流电升压，产生高压电能，其中，所述高压电能使所述放电回路中的所述接触网导线和所述受电弓之间的间隙产生高电压和大电流；
    采集所述接触网导线和所述受电弓之间的间隙在所述高压和大电流的状况下产生的电弧。
  2. 根据权利要求1所述的方法，其特征在于，在所述升压变压器将所述电网输送的交流电升压，产生高压电能之后，所述方法还包括：
    所述降压变压器将所述高压电能降压后，输送至所述升压变压器。
  3. 根据权利要求1所述的方法，其特征在于，所述高压电能使所述放电回路中的所述接触网导线和所述受电弓之间的间隙产生高电压和大电流的步骤包括：
    在所述接触网导线和所述受电弓之间的间隙被所述高压电能击穿后，所述放电回路导通，并产生大电流的高压电能。
  4. 根据权利要求1所述的方法，其特征在于，采集所述接触网导线和所述受电弓之间的间隙在所述高压和大电流的状况下产生的电弧的步骤包括：
    所述接触网导线与所述受电弓之间产生耦合振动并离线；
    采集所述接触网导线和受电弓之间的间隙在离线时产生的电弧。
  5. 根据权利要求4所述的方法，其特征在于，采集所述接触网导线和所述受电弓之间的间隙在离线时产生的所述电弧的步骤包括：
    使用摄像设备捕捉所述电弧从产生至熄灭之间的影像。
  6. 一种基于列车供电系统的弓网电弧的检测系统，其特征在于，所述系统包括：
    电网，用于输送电能；
    放电回路，包括：升压变压器、限流电阻、接触网导线、受电弓， 其中，所述升压变压器用于将所述电网输送的交流电升压，产生高压电能，其中，所述高压电能使所述放电回路中的所述接触网导线和所述受电弓之间的间隙产生高电压和大电流；
    采集设备，用于采集所述接触网导线和所述受电弓之间的间隙在所述高电压和大电流的状况下产生的所述电弧。
  7. 根据权利要求6所述的系统，其特征在于，所述放电回路还包括：
    降压变压器，与所述限流电阻和所述受电弓相连接，用于所述高压电能降压后，输送至所述升压变压器。
  8. 根据权利要求6所述的系统，其特征在于，所述采集设备还包括：
    振动装置，用于使所述接触网导线与所述受电弓之间产生耦合振动并离线；
    采集器，用于采集所述接触网导线和受所述电弓之间的间隙在离线时产生的所述电弧。
  9. 根据权利要求8所述的系统，其特征在于，在所述采集器为摄像设备的情况下，所述摄像设备，用于捕捉所述电弧从产生至熄灭之间的影像。
  10. 根据权利要求9所述的系统，其特征在于，所述升压变压器的变比为1:125，容量为60KVA。
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