WO2024108628A1 - Emu ground fault positioning control system - Google Patents

Emu ground fault positioning control system Download PDF

Info

Publication number
WO2024108628A1
WO2024108628A1 PCT/CN2022/135348 CN2022135348W WO2024108628A1 WO 2024108628 A1 WO2024108628 A1 WO 2024108628A1 CN 2022135348 W CN2022135348 W CN 2022135348W WO 2024108628 A1 WO2024108628 A1 WO 2024108628A1
Authority
WO
WIPO (PCT)
Prior art keywords
unit
current transformer
pantograph
current
transformer
Prior art date
Application number
PCT/CN2022/135348
Other languages
French (fr)
Chinese (zh)
Inventor
刘正威
左明洁
张佳乐
赵海波
Original Assignee
中车长春轨道客车股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 中车长春轨道客车股份有限公司 filed Critical 中车长春轨道客车股份有限公司
Publication of WO2024108628A1 publication Critical patent/WO2024108628A1/en

Links

Images

Classifications

    • 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
    • B60L5/20—Details of contact bow
    • 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
    • B60L5/22—Supporting means for the contact bow
    • B60L5/28—Devices for lifting and resetting the collector
    • 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
    • G01R31/52—Testing for short-circuits, leakage current or ground faults
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00—Systems supporting electrical power generation, transmission or distribution
    • Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
    • Y04S10/52—Outage or fault management, e.g. fault detection or location

Definitions

  • the utility model relates to the technical field of circuits, in particular to a motor vehicle grounding fault positioning control system.
  • the utility model provides a motor vehicle ground fault positioning control system to accurately locate the ground fault position and implement protection.
  • a motor vehicle ground fault location control system comprises: a control unit, a pantograph raising unit and a non-pantograph raising unit, wherein the pantograph raising unit comprises a first pantograph unit, a first main breaking unit, a first transformer unit, a first current transformer, a second current transformer, a third current transformer and a fourth current transformer; the first pantograph unit is connected to a contact network, and the first pantograph unit is connected to the first main breaking unit via a first current transformer; the first main breaking unit is connected to the first transformer unit via a second current transformer; the first transformer unit is grounded via a third current transformer;
  • the non-pantograph unit includes a second pantograph unit, a second main breaking unit and a second transformer unit, a fifth current transformer, a sixth current transformer, a seventh current transformer and an eighth current transformer; the second pantograph unit is connected to the second main breaking unit through the fifth current transformer; the second main breaking unit is connected to the second transformer unit through the sixth current transformer; the second transformer unit is grounded through the seventh current transformer;
  • the second end of the fourth current transformer is connected to the second end of the eighth current transformer via a through bus;
  • the control unit is used to control and determine the fault location according to the current detection value of each current transformer, and control the pantograph unit and/or the non-pantograph unit to perform a preset protection action.
  • the first main breaking unit comprises:
  • a first voltage transformer a first main circuit breaker, a first grounding switch, a first high-voltage disconnector and a second lightning arrester;
  • the first end of the first current transformer is connected to the output end of the first pantograph, and the second end of the first current transformer is respectively connected to the first end of the first voltage transformer and the first end of the first main circuit breaker; the second end of the first voltage transformer is grounded; the first main circuit breaker is connected in parallel with the first grounding switch; the second end of the first main circuit breaker is respectively connected to the first end of the second lightning arrester, the first end of the first high-voltage disconnector, and the first end of the second current transformer; the second end of the second lightning arrester is grounded; the second end of the first high-voltage disconnector is connected to the first end of the fourth current transformer;
  • the second main breaking unit comprises:
  • a second voltage transformer a second main circuit breaker, a second grounding switch, a second high-voltage disconnector and a fourth lightning arrester;
  • the first end of the fifth current transformer is connected to the output end of the second pantograph, and the second end of the fifth current transformer is respectively connected to the first end of the second voltage transformer and the first end of the second main circuit breaker; the second end of the second voltage transformer is grounded; the second main circuit breaker is connected in parallel with the second grounding switch; the second end of the second main circuit breaker is respectively connected to the first end of the fourth lightning arrester, the first end of the second high-voltage disconnector, and the first end of the sixth current transformer; the second end of the fourth lightning arrester is grounded; the second end of the second high-voltage disconnector is connected to the first end of the eighth current transformer.
  • the first pantograph unit includes: a first pantograph and a first lightning arrester; the first pantograph input end is connected to the overhead line, and the first pantograph output end is grounded through the first lightning arrester.
  • the second pantograph unit includes: a second pantograph and a third lightning arrester; the first pantograph input terminal is connected to the overhead line, and the first pantograph output terminal is grounded through the third lightning arrester.
  • control unit is used to determine that a ground fault has occurred in the first pantograph unit when the current value detected by each current transformer does not exceed the corresponding current limiting value and the first voltage transformer detects that the contact network has tripped and the power is cut off; control the first main circuit breaker to disconnect, the first pantograph to cut off the connection with the contact network, and control the second pantograph to connect to the contact network.
  • control unit is used to determine that a ground fault has occurred in the first main breaking unit when the current value detected by the first current transformer exceeds the first current limiting value for a preset time, or the difference between the current value detected by the first current transformer and the current value detected by the second current transformer of the pantograph unit and the current value detected by the fourth current transformer exceeds a threshold value for a preset time; control the first main circuit breaker to disconnect, the first pantograph to cut off the connection with the contact network, and the first high-voltage disconnector and the second high-voltage disconnector to disconnect; after the first high-voltage disconnector and the second high-voltage disconnector are disconnected, control the second pantograph to connect to the contact network and close the second main circuit breaker.
  • control unit is used to determine that a ground fault has occurred in the first transformer unit when the current value detected by the second current transformer or the current value detected by the third current transformer exceeds the second current limiting value for a preset time, or the difference between the current value detected by the second current transformer and the current value detected by the third current transformer exceeds a threshold for a preset time; control the first main circuit breaker to disconnect, the first pantograph to cut off the connection with the contact network, and the first high-voltage disconnector and the second high-voltage disconnector to disconnect; after the first high-voltage disconnector and the second high-voltage disconnector are disconnected, control the second pantograph to connect to the contact network and close the second main circuit breaker.
  • control unit is used to determine that a ground fault occurs in the busbar connecting the second end of the fourth current transformer and the second end of the eighth current transformer when the current value detected by the fourth current transformer exceeds the second current limiting value for a preset time and the current value detected by the eighth current transformer does not exceed the second current limiting value, or the difference between the current value detected by the fourth current transformer and the current value detected by the eighth current transformer exceeds a threshold for a preset time; control the first main circuit breaker to be disconnected, and the first high-voltage disconnector and the second high-voltage disconnector to be disconnected; and control the first main circuit breaker to be closed after the first high-voltage disconnector and the second high-voltage disconnector are disconnected.
  • control unit is used to determine that a ground fault occurs in the second main breaking unit when the current value detected by the eighth current transformer exceeds the second current limiting value for a preset time, or the difference between the current value detected by the eighth current transformer and the current value detected by the sixth current transformer exceeds a threshold for a preset time; control the first main circuit breaker to be disconnected, the first high-voltage disconnecting switch and the second high-voltage disconnecting switch to be disconnected, and after the first high-voltage disconnecting switch and the second high-voltage disconnecting switch are disconnected, control the first main circuit breaker to be closed.
  • control unit is used to determine that a ground fault occurs in the second transformer unit when the current value detected by the sixth current transformer or the current value detected by the seventh current transformer exceeds the second current limiting value for a preset time; or when the difference between the current value detected by the sixth current transformer and the current value detected by the seventh current transformer exceeds a threshold for a preset time; control the first main circuit breaker to be disconnected, the first high-voltage disconnecting switch and the second high-voltage disconnecting switch to be disconnected, and after the first high-voltage disconnecting switch and the second high-voltage disconnecting switch are disconnected, control the first main circuit breaker to be closed.
  • the utility model adds two current transformers on the through bus connecting the pantograph unit and the non-pantograph unit.
  • the circuit unit where the grounding fault occurs can be accurately located by detecting the change of the current value of each current transformer, and a protective action can be implemented to avoid the faulty part being put into use again.
  • FIG1 is a structural diagram of a motor vehicle ground fault location control system provided by an embodiment of the utility model
  • FIG. 2 is a circuit diagram of a high voltage system of a motor vehicle provided in an embodiment of the utility model.
  • FIG. 1 is a structural diagram of a motor vehicle ground fault location control system. As shown in FIG. 1 , the system includes: a control unit, a pantograph raising unit and a non-pantograph raising unit.
  • the pantograph unit comprises a first pantograph unit, a first main breaking unit, a first transformer unit, a first current transformer, a second current transformer, a third current transformer and a fourth current transformer;
  • the first pantograph unit is connected to the overhead line, and the first pantograph unit is connected to the first main breaking unit through the first current transformer;
  • the first main breaking unit is connected to the first transformer unit through the second current transformer;
  • the first transformer unit is grounded through the third current transformer;
  • the non-pantograph unit includes a second pantograph unit, a second main breaking unit and a second transformer unit, a fifth current transformer, a sixth current transformer, a seventh current transformer and an eighth current transformer; the second pantograph unit is connected to the second main breaking unit through the fifth current transformer; the second main breaking unit is connected to the second transformer unit through the sixth current transformer; the second transformer unit is grounded through the seventh current transformer;
  • the second end of the fourth current transformer is connected to the second end of the eighth current transformer via a through bus;
  • the control unit is used to control and determine the fault location according to the current detection value of each current transformer, and control the pantograph unit and/or the non-pantograph unit to perform a preset protection action.
  • the utility model adds two current transformers on the through bus connecting the pantograph unit and the non-pantograph unit.
  • the circuit unit where the grounding fault occurs can be accurately located by detecting the change of the current value of each current transformer, and a protective action can be implemented to avoid the faulty part being put into use again.
  • FIG. 2 is a circuit diagram of a high-voltage system of a motor vehicle using a motor vehicle ground fault location control system. As shown in Figure 2,
  • the pantograph raising unit TP03 includes:
  • the first pantograph unit includes: a first pantograph and a first lightning arrester; the first pantograph input end is connected to the overhead line, and the first pantograph output end is grounded through the first lightning arrester.
  • the first main breaking unit comprises:
  • a first voltage transformer a first main circuit breaker, a first grounding switch, a first high-voltage disconnector and a second lightning arrester;
  • the first end of the first current transformer CT1 is connected to the output end of the first pantograph, and the second end of the first current transformer CT1 is respectively connected to the first end of the first voltage transformer and the first end of the first main circuit breaker; the second end of the first voltage transformer is grounded; the first main circuit breaker is connected in parallel with the first grounding switch; the second end of the first main circuit breaker is respectively connected to the first end of the second lightning arrester, the first end of the first high-voltage disconnector, and the first end of the second current transformer CT2; the second end of the second lightning arrester is grounded; the second end of the first high-voltage disconnector is connected to the first end of the fourth current transformer CT4;
  • the first transformer unit includes: a first traction transformer, the first traction transformer is grounded through a third current transformer CT3, and the traction transformer is also connected to the traction auxiliary converter of the M02 car and the traction auxiliary converter of the MH04 car.
  • Non-lifting unit TP06 includes:
  • the second pantograph unit comprises: a second pantograph and a third lightning arrester; the first pantograph input end is connected to the overhead line, and the first pantograph output end is grounded through the third lightning arrester.
  • the second main breaking unit comprises:
  • a second voltage transformer a second main circuit breaker, a second grounding switch, a second high-voltage disconnector and a fourth lightning arrester;
  • the first end of the fifth current transformer CT1 is connected to the output end of the second pantograph, and the second end of the fifth current transformer CT1 is respectively connected to the first end of the second voltage transformer and the first end of the second main circuit breaker; the second end of the second voltage transformer is grounded; the second main circuit breaker is connected in parallel with the second grounding switch; the second end of the second main circuit breaker is respectively connected to the first end of the fourth lightning arrester, the first end of the second high-voltage disconnector, and the first end of the sixth current transformer CT2; the second end of the fourth lightning arrester is grounded; the second end of the second high-voltage disconnector is connected to the first end of the eighth current transformer CT4.
  • the second transformer unit includes: a second traction transformer, which is grounded through a seventh current transformer CT3.
  • the traction transformer is also connected to the traction auxiliary converter of the MB05 car and the traction auxiliary converter of the M07 car.
  • the current transformer can divide the high-voltage main circuit into 6 sections: 1 before the first current transformer CT1 of the bow raising unit, that is, the first pantograph unit; 2 between the first current transformer CT1, the second current transformer CT2, and the fourth current transformer CT4 of the bow raising unit, that is, the first main breaker unit; 3 after the second current transformer CT2 of the bow raising unit, that is, the first transformer unit; 4 between the fourth current transformer CT4 of the bow raising unit and the eighth current transformer CT4 of the non-bow raising unit; 5 between part of the second main breaker unit, the sixth current transformer CT2, and the eighth current transformer CT4 of the non-bow raising unit; 6 after the sixth current transformer CT2 of the non-bow raising unit.
  • control unit is used to determine that the first pantograph unit (section 1) has a ground fault when the current value detected by each current transformer does not exceed the corresponding current limit value and the first voltage transformer detects that the contact network is tripped and powered off; control the first main circuit breaker to disconnect, the first pantograph to cut off the connection with the contact network, and control the second pantograph to connect with the contact network.
  • the pantograph is replaced to maintain operation, and the ground fault part is prohibited from being put into operation again.
  • control unit is used to determine that the first main breaker unit (section 2) has a ground fault when the current value detected by the first current transformer CT1 of the pantograph unit exceeds the first current limit value for a preset time, and other current transformers do not exceed the corresponding current limit value, or the difference between the current value detected by the first current transformer CT1 of the pantograph unit and the current value detected by the second current transformer CT2 and the current value detected by the fourth current transformer CT4 exceeds the threshold value for a preset time; control the first main circuit breaker to disconnect, the first pantograph to cut off the connection with the contact network, and the first high-voltage disconnector and the second high-voltage disconnector to disconnect; after the first high-voltage disconnector and the second high-voltage disconnector are disconnected, control the second pantograph to connect to the contact network and close the second main circuit breaker.
  • the pantograph is replaced to maintain operation, and the grounding part is prohibited from being put into operation again.
  • control unit is used to determine that the first transformer unit (section 3) has a ground fault when the current value detected by the second current transformer CT2 or the third current transformer CT3 of the pantograph unit exceeds the second current limit value for a preset time, or the difference between the current value detected by the second current transformer CT2 and the current value detected by the third current transformer CT3 exceeds the threshold for a preset time; control the first main circuit breaker to disconnect, the first pantograph to cut off the connection with the contact network, and the first high-voltage disconnector and the second high-voltage disconnector to disconnect; after the first high-voltage disconnector and the second high-voltage disconnector are disconnected, control the second pantograph to connect to the contact network and close the second main circuit breaker.
  • the high-voltage system circuit is switched to maintain operation, and the original non-pantograph unit is used as the pantograph unit, and the ground fault part is prohibited from secondary access.
  • control unit is used to determine that a ground fault occurs in the through bus (section 4) connecting the second end of the fourth current transformer and the second end of the eighth current transformer when the current value detected by the fourth current transformer CT4 of the bow-raising unit exceeds the second current limiting value for a preset time, and the current value detected by the eighth current transformer CT4 of the non-bow-raising unit does not exceed the second current limiting value, or the difference between the current value detected by the fourth current transformer CT4 of the bow-raising unit and the current value detected by the eighth current transformer CT4 of the non-bow-raising unit exceeds the threshold for a preset time; control the first main circuit breaker to be disconnected, the first high-voltage disconnector to be disconnected, and the second high-voltage disconnector to be disconnected; after the first high-voltage disconnector and the second high-voltage disconnector are disconnected, control the first main circuit breaker to be closed. Secondary access to the ground fault site is prohibited.
  • control unit is used to determine that the second main breaking unit (section 5) has a ground fault when the current value detected by the eighth current transformer CT4 of the non-rising unit exceeds the second current limit value for a preset time, or the difference between the current value detected by the eighth current transformer CT4 of the non-rising unit and the current value detected by the sixth current transformer CT2 exceeds the threshold for a preset time; control the first main circuit breaker to be disconnected, the first high-voltage disconnector and the second high-voltage disconnector to be disconnected, and control the first main circuit breaker to be closed after the first high-voltage disconnector and the second high-voltage disconnector are disconnected. It is forbidden to put the ground fault part into operation again.
  • control unit is used to determine that the second transformer unit (section 6) has a ground fault when the current value detected by the sixth current transformer CT2 of the non-bow-raising unit or the current value detected by the seventh current transformer CT3 exceeds the second current limit value for a preset time; or when the difference between the current value detected by the sixth current transformer CT2 of the non-bow-raising unit and the current value detected by the seventh current transformer CT3 exceeds the threshold for a preset time; control the first main circuit breaker to disconnect, the first high-voltage disconnector and the second high-voltage disconnector to disconnect, and after the first high-voltage disconnector and the second high-voltage disconnector are disconnected, control the first main circuit breaker to close. It is forbidden to put the grounding part into operation twice.
  • the second current limit value is smaller than the first current limit value.
  • the first current limit value may be 500A
  • the second current limit value may be 250A.
  • Different vehicle models can set different current limiting values and preset times based on differences in vehicle power, rated current, sampling frequency, network transmission time, etc.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

An EMU ground fault positioning control system, which comprises: a control unit, a pantograph lifting unit, and a non-pantograph-lifting unit; a first pantograph unit of the pantograph lifting unit is connected to a contact network, and the first pantograph unit is connected to a first main breaker unit by means of a first current transformer; the first main breaker unit is connected to a first transformer unit by means of a second current transformer; the first transformer unit is grounded by means of a third current transformer; a second pantograph unit of the non-pantograph-lifting unit is connected to a second main breaker unit by means of a fifth current transformer; the second main breaker unit is connected to a second transformer unit by means of a sixth current transformer; the second transformer unit is grounded by means of a seventh current transformer; a fourth current transformer is connected to an eighth current transformer by means of a pass-through bus; a control unit controls and determines a fault position according to an electric current detection value of each current transformer, and controls the pantograph lifting unit and/or the non-pantograph-lifting unit to execute a preset protective action.

Description

一种动车接地故障定位控制***A control system for locating ground fault of electric train
本实用新型要求于2022年11月25日提交中华人民共和国国家知识产权局、申请号为202223152255.9、申请名称为“一种动车接地故障定位控制***”的中国专利申请的优先权，其全部内容通过引用结合在本实用新型中。This utility model claims the priority of the Chinese patent application filed with the State Intellectual Property Office of the People's Republic of China on November 25, 2022, with application number 202223152255.9 and application name "A EMU Ground Fault Location and Control System", all contents of which are incorporated by reference in this utility model.
技术领域Technical Field
本实用新型涉及电路技术领域，特别是涉及一种动车接地故障定位控制***。The utility model relates to the technical field of circuits, in particular to a motor vehicle grounding fault positioning control system.
背景技术Background technique
目前，动车组高压***主回路中设置的电流互感器较少，当发生高压接地故障时，无法准确定位故障位置，需要进行升弓验电操作，存在接地点二次投入导致接触网烧断的风险，对运营秩序造成较大影响。At present, there are few current transformers installed in the main circuit of the high-voltage system of the EMU. When a high-voltage grounding fault occurs, the fault position cannot be accurately located, and a pantograph raising and electrical testing operation is required. There is a risk of the contact network burning out due to the secondary grounding point, which has a great impact on the operating order.
实用新型内容Utility Model Content
基于上述问题，本实用新型提供了一种动车接地故障定位控制***，以准确定位接地故障位置，并实施保护。Based on the above problems, the utility model provides a motor vehicle ground fault positioning control system to accurately locate the ground fault position and implement protection.
本实用新型实施例公开了如下技术方案：The utility model embodiment discloses the following technical solution:
一种动车接地故障定位控制***，包括：控制单元、升***元和非升***元，所述升***元包括第一受电***元、第一主断单元、第一变压器单元、第一电流互感器、第二电流互感器、第三电流互感器和第四电流互感器；第一受电***元接入接触网，第一受电***元经过第一电流互感器与第一主断单元连接；第一主断单元经过第二电流互感器与第一变压器单元连接；所述第一变压器单元经过第三电流互感器接地；A motor vehicle ground fault location control system comprises: a control unit, a pantograph raising unit and a non-pantograph raising unit, wherein the pantograph raising unit comprises a first pantograph unit, a first main breaking unit, a first transformer unit, a first current transformer, a second current transformer, a third current transformer and a fourth current transformer; the first pantograph unit is connected to a contact network, and the first pantograph unit is connected to the first main breaking unit via a first current transformer; the first main breaking unit is connected to the first transformer unit via a second current transformer; the first transformer unit is grounded via a third current transformer;
所述非升***元包括第二受电***元、第二主断单元和第二变压器单元、第五电流互感器、第六电流互感器、第七电流互感器和第八电流互感器；第二受电***元经过第五电流互感器与第二主断单元连接；第二主断单元经过第六电流互感器与第二变压器单元连接；所述第二变压器单元经过第七电流互感器接地；The non-pantograph unit includes a second pantograph unit, a second main breaking unit and a second transformer unit, a fifth current transformer, a sixth current transformer, a seventh current transformer and an eighth current transformer; the second pantograph unit is connected to the second main breaking unit through the fifth current transformer; the second main breaking unit is connected to the second transformer unit through the sixth current transformer; the second transformer unit is grounded through the seventh current transformer;
所述第四电流互感器第二端与所述第八电流互感器第二端通过贯穿母线连接；The second end of the fourth current transformer is connected to the second end of the eighth current transformer via a through bus;
控制单元用于根据各电流互感器的电流检测值控制确定故障位置，并控制升***元和/或非升***元执行预设保护动作。The control unit is used to control and determine the fault location according to the current detection value of each current transformer, and control the pantograph unit and/or the non-pantograph unit to perform a preset protection action.
进一步地，所述第一主断单元包括：Furthermore, the first main breaking unit comprises:
第一电压互感器、第一主断路器、第一接地开关、第一高压隔离开关和第二避雷器；A first voltage transformer, a first main circuit breaker, a first grounding switch, a first high-voltage disconnector and a second lightning arrester;
所述第一电流互感器第一端与所述第一受电弓输出端连接，所述第一电流互感器第二端分别与第一电压互感器第一端、第一主断路器第一端连接；所述第一电压互感器第二端接地；所述第一主断路器与第一接地开关并联连接；所述第一主断路器第二端分别与第二避雷器第一端、第一高压隔离开关第一端、第二电流互感器第一端连接； 第二避雷器第二端接地；第一高压隔离开关第二端与第四电流互感器第一端连接；The first end of the first current transformer is connected to the output end of the first pantograph, and the second end of the first current transformer is respectively connected to the first end of the first voltage transformer and the first end of the first main circuit breaker; the second end of the first voltage transformer is grounded; the first main circuit breaker is connected in parallel with the first grounding switch; the second end of the first main circuit breaker is respectively connected to the first end of the second lightning arrester, the first end of the first high-voltage disconnector, and the first end of the second current transformer; the second end of the second lightning arrester is grounded; the second end of the first high-voltage disconnector is connected to the first end of the fourth current transformer;
所述第二主断单元包括：The second main breaking unit comprises:
第二电压互感器、第二主断路器、第二接地开关、第二高压隔离开关和第四避雷器；a second voltage transformer, a second main circuit breaker, a second grounding switch, a second high-voltage disconnector and a fourth lightning arrester;
所述第五电流互感器第一端与所述第二受电弓输出端连接，所述第五电流互感器第二端分别与第二电压互感器第一端、第二主断路器第一端连接；所述第二电压互感器第二端接地；所述第二主断路器与第二接地开关并联连接；所述第二主断路器第二端分别与第四避雷器第一端、第二高压隔离开关第一端、第六电流互感器第一端连接；第四避雷器第二端接地；第二高压隔离开关第二端与第八电流互感器第一端连接。The first end of the fifth current transformer is connected to the output end of the second pantograph, and the second end of the fifth current transformer is respectively connected to the first end of the second voltage transformer and the first end of the second main circuit breaker; the second end of the second voltage transformer is grounded; the second main circuit breaker is connected in parallel with the second grounding switch; the second end of the second main circuit breaker is respectively connected to the first end of the fourth lightning arrester, the first end of the second high-voltage disconnector, and the first end of the sixth current transformer; the second end of the fourth lightning arrester is grounded; the second end of the second high-voltage disconnector is connected to the first end of the eighth current transformer.
进一步地，所述第一受电***元包括：第一受电弓、第一避雷器；所述第一受电弓输入端与接触网连接，所述第一受电弓输出端通过所述第一避雷器接地。Furthermore, the first pantograph unit includes: a first pantograph and a first lightning arrester; the first pantograph input end is connected to the overhead line, and the first pantograph output end is grounded through the first lightning arrester.
进一步地，所述第二受电***元包括：第二受电弓、第三避雷器；所述第一受电弓输入端与接触网连接，所述第一受电弓输出端通过所述第三避雷器接地。Furthermore, the second pantograph unit includes: a second pantograph and a third lightning arrester; the first pantograph input terminal is connected to the overhead line, and the first pantograph output terminal is grounded through the third lightning arrester.
进一步地，所述控制单元用于在各电流互感器检测电流值未超过对应的限流值，且第一电压互感器检测到接触网跳闸断电时，确定第一受电***元出现接地故障；控制第一主断路器断开，第一受电弓切除与接触网的连接，控制第二受电弓与接触网连接。Furthermore, the control unit is used to determine that a ground fault has occurred in the first pantograph unit when the current value detected by each current transformer does not exceed the corresponding current limiting value and the first voltage transformer detects that the contact network has tripped and the power is cut off; control the first main circuit breaker to disconnect, the first pantograph to cut off the connection with the contact network, and control the second pantograph to connect to the contact network.
进一步地，所述控制单元用于在第一电流互感器检测电流值超过第一限流值达到预设时间，或者第一电流互感器检测电流值与升***元第二电流互感器检测电流值和第四电流互感器检测电流值差值超过阈值达到预设时间，确定第一主断单元出现接地故障；控制第一主断路器断开，第一受电弓切除与接触网的连接，第一高压隔离开关和第二高压隔离开关断开；在第一高压隔离开关和第二高压隔离开关断开后，控制第二受电弓与接触网连接，第二主断路器闭合。Furthermore, the control unit is used to determine that a ground fault has occurred in the first main breaking unit when the current value detected by the first current transformer exceeds the first current limiting value for a preset time, or the difference between the current value detected by the first current transformer and the current value detected by the second current transformer of the pantograph unit and the current value detected by the fourth current transformer exceeds a threshold value for a preset time; control the first main circuit breaker to disconnect, the first pantograph to cut off the connection with the contact network, and the first high-voltage disconnector and the second high-voltage disconnector to disconnect; after the first high-voltage disconnector and the second high-voltage disconnector are disconnected, control the second pantograph to connect to the contact network and close the second main circuit breaker.
进一步地，所述控制单元用于在第二电流互感器检测电流值或第三电流互感器检测电流值超过第二限流值达到预设时间，或者第二电流互感器检测电流值与第三电流互感器检测电流值的差值超过阈值达到预设时间，确定第一变压器单元出现接地故障；控制第一主断路器断开，第一受电弓切除与接触网的连接，第一高压隔离开关和第二高压隔离开关断开；在第一高压隔离开关和第二高压隔离开关断开后，控制第二受电弓与接触网连接，第二主断路器闭合。Furthermore, the control unit is used to determine that a ground fault has occurred in the first transformer unit when the current value detected by the second current transformer or the current value detected by the third current transformer exceeds the second current limiting value for a preset time, or the difference between the current value detected by the second current transformer and the current value detected by the third current transformer exceeds a threshold for a preset time; control the first main circuit breaker to disconnect, the first pantograph to cut off the connection with the contact network, and the first high-voltage disconnector and the second high-voltage disconnector to disconnect; after the first high-voltage disconnector and the second high-voltage disconnector are disconnected, control the second pantograph to connect to the contact network and close the second main circuit breaker.
进一步地，所述控制单元用于在第四电流互感器检测电流值超过第二限流值达到预设时间，且第八电流互感器检测电流值未超过第二限流值，或者第四电流互感器检测电流值与第八电流互感器检测电流值的差值超过阈值达到预设时间时，确定连接所述第四电流互感器第二端与所述第八电流互感器第二端的贯穿母线出现接地故障；控制第一主断路器断开，第一高压隔离开关和第二高压隔离开关断开；在第一高压隔离开关和第二高压隔离开关断开后，控制第一主断路器闭合。Further, the control unit is used to determine that a ground fault occurs in the busbar connecting the second end of the fourth current transformer and the second end of the eighth current transformer when the current value detected by the fourth current transformer exceeds the second current limiting value for a preset time and the current value detected by the eighth current transformer does not exceed the second current limiting value, or the difference between the current value detected by the fourth current transformer and the current value detected by the eighth current transformer exceeds a threshold for a preset time; control the first main circuit breaker to be disconnected, and the first high-voltage disconnector and the second high-voltage disconnector to be disconnected; and control the first main circuit breaker to be closed after the first high-voltage disconnector and the second high-voltage disconnector are disconnected.
进一步地，所述控制单元用于在第八电流互感器检测电流值超过第二限流值达到预设时间，或者第八电流互感器检测电流值与第六电流互感器检测电流值的差值超过 阈值达到预设时间时，确定第二主断单元出现接地故障；控制第一主断路器断开，第一高压隔离开关和第二高压隔离开关断开，在第一高压隔离开关和第二高压隔离开关断开后，控制第一主断路器闭合。Furthermore, the control unit is used to determine that a ground fault occurs in the second main breaking unit when the current value detected by the eighth current transformer exceeds the second current limiting value for a preset time, or the difference between the current value detected by the eighth current transformer and the current value detected by the sixth current transformer exceeds a threshold for a preset time; control the first main circuit breaker to be disconnected, the first high-voltage disconnecting switch and the second high-voltage disconnecting switch to be disconnected, and after the first high-voltage disconnecting switch and the second high-voltage disconnecting switch are disconnected, control the first main circuit breaker to be closed.
进一步地，所述控制单元用于在第六电流互感器检测电流值或第七电流互感器检测电流值超过第二限流值达到预设时间时；或者第六电流互感器检测电流值与第七电流互感器检测电流值的差值超过阈值达到预设时间时，确定所述第二变压器单元出现接地故障；控制第一主断路器断开，第一高压隔离开关和第二高压隔离开关断开，在第一高压隔离开关和第二高压隔离开关断开后，控制第一主断路器闭合。Further, the control unit is used to determine that a ground fault occurs in the second transformer unit when the current value detected by the sixth current transformer or the current value detected by the seventh current transformer exceeds the second current limiting value for a preset time; or when the difference between the current value detected by the sixth current transformer and the current value detected by the seventh current transformer exceeds a threshold for a preset time; control the first main circuit breaker to be disconnected, the first high-voltage disconnecting switch and the second high-voltage disconnecting switch to be disconnected, and after the first high-voltage disconnecting switch and the second high-voltage disconnecting switch are disconnected, control the first main circuit breaker to be closed.
相较于现有技术，本实用新型具有以下有益效果：Compared with the prior art, the utility model has the following beneficial effects:
本实用新型在连接升***元和非升***元的贯穿母线上增加两个电流互感器，通过各个电流互感器的检测电流值变化情况可以准确定位发生接地故障的电路单元，并实施保护动作，避免故障部位二次投入使用。The utility model adds two current transformers on the through bus connecting the pantograph unit and the non-pantograph unit. The circuit unit where the grounding fault occurs can be accurately located by detecting the change of the current value of each current transformer, and a protective action can be implemented to avoid the faulty part being put into use again.
附图说明BRIEF DESCRIPTION OF THE DRAWINGS
为了更清楚地说明本实用新型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实用新型的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.
图1为本实用新型实施例提供的一种动车接地故障定位控制***结构图；FIG1 is a structural diagram of a motor vehicle ground fault location control system provided by an embodiment of the utility model;
图2为本实用新型实施例提供的动车高压***电路图。FIG. 2 is a circuit diagram of a high voltage system of a motor vehicle provided in an embodiment of the utility model.
具体实施方式Detailed ways
正如前文描述，目前动车组高压***主回路中设置的电流互感器较少，当发生高压接地故障时，无法准确定位故障位置，需要进行升弓验电操作，存在接地点二次投入导致接触网烧断的风险，对运营秩序造成较大影响。As described above, there are currently few current transformers installed in the main circuit of the EMU high-voltage system. When a high-voltage grounding fault occurs, the fault location cannot be accurately located, and a pantograph raising and electrical testing operation is required. There is a risk of the contact network burning out due to the secondary grounding point, which has a significant impact on the operating order.
为了使本技术领域的人员更好地理解本实用新型方案，下面将结合本实用新型实施例中的附图，对本实用新型实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅是本实用新型一部分实施例，而不是全部的实施例。基于本实用新型中的实施例，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，都属于本实用新型保护的范围。In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
参见图1，该图为一种动车接地故障定位控制***结构图，如图1所示，该***包括：控制单元、升***元和非升***元。Refer to FIG. 1 , which is a structural diagram of a motor vehicle ground fault location control system. As shown in FIG. 1 , the system includes: a control unit, a pantograph raising unit and a non-pantograph raising unit.
升***元包括第一受电***元、第一主断单元、第一变压器单元、第一电流互感器、第二电流互感器、第三电流互感器和第四电流互感器；第一受电***元接入接触网，第一受电***元经过第一电流互感器与第一主断单元连接；第一主断单元经过第二电流互感器与第一变压器单元连接；所述第一变压器单元经过第三电流互感器接地；The pantograph unit comprises a first pantograph unit, a first main breaking unit, a first transformer unit, a first current transformer, a second current transformer, a third current transformer and a fourth current transformer; the first pantograph unit is connected to the overhead line, and the first pantograph unit is connected to the first main breaking unit through the first current transformer; the first main breaking unit is connected to the first transformer unit through the second current transformer; the first transformer unit is grounded through the third current transformer;
非升***元包括第二受电***元、第二主断单元和第二变压器单元、第五电流互感器、 第六电流互感器、第七电流互感器和第八电流互感器；第二受电***元经过第五电流互感器与第二主断单元连接；第二主断单元经过第六电流互感器与第二变压器单元连接；所述第二变压器单元经过第七电流互感器接地；The non-pantograph unit includes a second pantograph unit, a second main breaking unit and a second transformer unit, a fifth current transformer, a sixth current transformer, a seventh current transformer and an eighth current transformer; the second pantograph unit is connected to the second main breaking unit through the fifth current transformer; the second main breaking unit is connected to the second transformer unit through the sixth current transformer; the second transformer unit is grounded through the seventh current transformer;
所述第四电流互感器第二端与所述第八电流互感器第二端通过贯穿母线连接；The second end of the fourth current transformer is connected to the second end of the eighth current transformer via a through bus;
控制单元用于根据各电流互感器的电流检测值控制确定故障位置，并控制升***元和/或非升***元执行预设保护动作。The control unit is used to control and determine the fault location according to the current detection value of each current transformer, and control the pantograph unit and/or the non-pantograph unit to perform a preset protection action.
本实用新型在连接升***元和非升***元的贯穿母线上增加两个电流互感器，通过各个电流互感器的检测电流值变化情况可以准确定位发生接地故障的电路单元，并实施保护动作，避免故障部位二次投入使用。The utility model adds two current transformers on the through bus connecting the pantograph unit and the non-pantograph unit. The circuit unit where the grounding fault occurs can be accurately located by detecting the change of the current value of each current transformer, and a protective action can be implemented to avoid the faulty part being put into use again.
参见图2，该图为应用动车接地故障定位控制***的动车高压***电路图，如图2所示，See Figure 2, which is a circuit diagram of a high-voltage system of a motor vehicle using a motor vehicle ground fault location control system. As shown in Figure 2,
升***元TP03包括：The pantograph raising unit TP03 includes:
第一受电***元，包括：第一受电弓、第一避雷器；所述第一受电弓输入端与接触网连接，所述第一受电弓输出端通过所述第一避雷器接地。The first pantograph unit includes: a first pantograph and a first lightning arrester; the first pantograph input end is connected to the overhead line, and the first pantograph output end is grounded through the first lightning arrester.
第一主断单元，包括：The first main breaking unit comprises:
第一电压互感器、第一主断路器、第一接地开关、第一高压隔离开关和第二避雷器；A first voltage transformer, a first main circuit breaker, a first grounding switch, a first high-voltage disconnector and a second lightning arrester;
所述第一电流互感器CT1第一端与所述第一受电弓输出端连接，所述第一电流互感器CT1第二端分别与第一电压互感器第一端、第一主断路器第一端连接；所述第一电压互感器第二端接地；所述第一主断路器与第一接地开关并联连接；所述第一主断路器第二端分别与第二避雷器第一端、第一高压隔离开关第一端、第二电流互感器CT2第一端连接；第二避雷器第二端接地；第一高压隔离开关第二端与第四电流互感器CT4第一端连接；The first end of the first current transformer CT1 is connected to the output end of the first pantograph, and the second end of the first current transformer CT1 is respectively connected to the first end of the first voltage transformer and the first end of the first main circuit breaker; the second end of the first voltage transformer is grounded; the first main circuit breaker is connected in parallel with the first grounding switch; the second end of the first main circuit breaker is respectively connected to the first end of the second lightning arrester, the first end of the first high-voltage disconnector, and the first end of the second current transformer CT2; the second end of the second lightning arrester is grounded; the second end of the first high-voltage disconnector is connected to the first end of the fourth current transformer CT4;
第一变压器单元，包括：第一牵引变压器，第一牵引变压器经过第三电流互感器CT3接地。牵引变压器还与M02车的牵引辅助变流器、MH04车的牵引辅助变流器相连。The first transformer unit includes: a first traction transformer, the first traction transformer is grounded through a third current transformer CT3, and the traction transformer is also connected to the traction auxiliary converter of the M02 car and the traction auxiliary converter of the MH04 car.
非升***元TP06包括：Non-lifting unit TP06 includes:
第二受电***元，包括：第二受电弓、第三避雷器；所述第一受电弓输入端与接触网连接，所述第一受电弓输出端通过所述第三避雷器接地。The second pantograph unit comprises: a second pantograph and a third lightning arrester; the first pantograph input end is connected to the overhead line, and the first pantograph output end is grounded through the third lightning arrester.
第二主断单元，包括：The second main breaking unit comprises:
第二电压互感器、第二主断路器、第二接地开关、第二高压隔离开关和第四避雷器；a second voltage transformer, a second main circuit breaker, a second grounding switch, a second high-voltage disconnector and a fourth lightning arrester;
所述第五电流互感器CT1第一端与所述第二受电弓输出端连接，所述第五电流互感器CT1第二端分别与第二电压互感器第一端、第二主断路器第一端连接；所述第二电压互感器第二端接地；所述第二主断路器与第二接地开关并联连接；所述第二主断路器第二端分别与第四避雷器第一端、第二高压隔离开关第一端、第六电流互感器CT2第一端连接；第四避雷器第二端接地；第二高压隔离开关第二端与第八电流互感器CT4第一端连接。The first end of the fifth current transformer CT1 is connected to the output end of the second pantograph, and the second end of the fifth current transformer CT1 is respectively connected to the first end of the second voltage transformer and the first end of the second main circuit breaker; the second end of the second voltage transformer is grounded; the second main circuit breaker is connected in parallel with the second grounding switch; the second end of the second main circuit breaker is respectively connected to the first end of the fourth lightning arrester, the first end of the second high-voltage disconnector, and the first end of the sixth current transformer CT2; the second end of the fourth lightning arrester is grounded; the second end of the second high-voltage disconnector is connected to the first end of the eighth current transformer CT4.
第二变压器单元，包括：第二牵引变压器，第二牵引变压器经过第七电流互感器CT3接地。牵引变压器还与MB05车的牵引辅助变流器、M07车的牵引辅助变流器相连。The second transformer unit includes: a second traction transformer, which is grounded through a seventh current transformer CT3. The traction transformer is also connected to the traction auxiliary converter of the MB05 car and the traction auxiliary converter of the M07 car.
正常运行时升单弓，仅升***元主断路器闭合，电流互感器可将高压主回路分为6段：①升***元的第一电流互感器CT1之前，即第一受电***元；②升***元的第一电流互感器CT1、第二电流互感器CT2、第四电流互感器CT4之间，即第一主断单元；③升***元 的第二电流互感器CT2之后，即第一变压器单元；④升***元的第四电流互感器CT4、非升***元的第八电流互感器CT4之间；⑤非升***元的部分第二主断单元、第六电流互感器CT2、第八电流互感器CT4之间；⑥非升***元的第六电流互感器CT2之后。During normal operation, when a single bow is raised, only the main circuit breaker of the bow raising unit is closed, and the current transformer can divide the high-voltage main circuit into 6 sections: ① before the first current transformer CT1 of the bow raising unit, that is, the first pantograph unit; ② between the first current transformer CT1, the second current transformer CT2, and the fourth current transformer CT4 of the bow raising unit, that is, the first main breaker unit; ③ after the second current transformer CT2 of the bow raising unit, that is, the first transformer unit; ④ between the fourth current transformer CT4 of the bow raising unit and the eighth current transformer CT4 of the non-bow raising unit; ⑤ between part of the second main breaker unit, the sixth current transformer CT2, and the eighth current transformer CT4 of the non-bow raising unit; ⑥ after the sixth current transformer CT2 of the non-bow raising unit.
在一个实施例中，控制单元用于在各电流互感器检测电流值未超过对应的限流值，且第一电压互感器检测到接触网跳闸断电时，确定第一受电***元(第①段)出现接地故障；控制第一主断路器断开，第一受电弓切除与接触网的连接，控制第二受电弓与接触网连接。换弓维持运行，禁止接地故障部位二次投入。In one embodiment, the control unit is used to determine that the first pantograph unit (section ①) has a ground fault when the current value detected by each current transformer does not exceed the corresponding current limit value and the first voltage transformer detects that the contact network is tripped and powered off; control the first main circuit breaker to disconnect, the first pantograph to cut off the connection with the contact network, and control the second pantograph to connect with the contact network. The pantograph is replaced to maintain operation, and the ground fault part is prohibited from being put into operation again.
在一个实施例中，控制单元用于在升***元的第一电流互感器CT1检测电流值超过第一限流值达到预设时间，其他电流互感器均未超过对应的限流值，或者升***元的第一电流互感器CT1检测电流值与第二电流互感器CT2检测电流值和第四电流互感器CT4检测电流值差值超过阈值达到预设时间，确定第一主断单元(第②段)出现接地故障；控制第一主断路器断开，第一受电弓切除与接触网的连接，第一高压隔离开关和第二高压隔离开关断开；在第一高压隔离开关和第二高压隔离开关断开后，控制第二受电弓与接触网连接，第二主断路器闭合。换弓维持运行，禁止接地部位二次投入。In one embodiment, the control unit is used to determine that the first main breaker unit (section ②) has a ground fault when the current value detected by the first current transformer CT1 of the pantograph unit exceeds the first current limit value for a preset time, and other current transformers do not exceed the corresponding current limit value, or the difference between the current value detected by the first current transformer CT1 of the pantograph unit and the current value detected by the second current transformer CT2 and the current value detected by the fourth current transformer CT4 exceeds the threshold value for a preset time; control the first main circuit breaker to disconnect, the first pantograph to cut off the connection with the contact network, and the first high-voltage disconnector and the second high-voltage disconnector to disconnect; after the first high-voltage disconnector and the second high-voltage disconnector are disconnected, control the second pantograph to connect to the contact network and close the second main circuit breaker. The pantograph is replaced to maintain operation, and the grounding part is prohibited from being put into operation again.
在一个实施例中，控制单元用于在升***元的第二电流互感器CT2检测电流值或第三电流互感器CT3检测电流值超过第二限流值达到预设时间，或者第二电流互感器CT2检测电流值与第三电流互感器CT3检测电流值的差值超过阈值时达到预设时间，确定第一变压器单元(第③段)出现接地故障；控制第一主断路器断开，第一受电弓切除与接触网的连接，第一高压隔离开关和第二高压隔离开关断开；在第一高压隔离开关和第二高压隔离开关断开后，控制第二受电弓与接触网连接，第二主断路器闭合。使高压***电路换弓维持运行，原来的非升***元作为升***元，禁止接地故障部位二次接入。In one embodiment, the control unit is used to determine that the first transformer unit (section ③) has a ground fault when the current value detected by the second current transformer CT2 or the third current transformer CT3 of the pantograph unit exceeds the second current limit value for a preset time, or the difference between the current value detected by the second current transformer CT2 and the current value detected by the third current transformer CT3 exceeds the threshold for a preset time; control the first main circuit breaker to disconnect, the first pantograph to cut off the connection with the contact network, and the first high-voltage disconnector and the second high-voltage disconnector to disconnect; after the first high-voltage disconnector and the second high-voltage disconnector are disconnected, control the second pantograph to connect to the contact network and close the second main circuit breaker. The high-voltage system circuit is switched to maintain operation, and the original non-pantograph unit is used as the pantograph unit, and the ground fault part is prohibited from secondary access.
在一个实施例中，控制单元用于在升***元的第四电流互感器CT4检测电流值超过第二限流值达到预设时间，且非升***元的第八电流互感器CT4检测电流值未超过第二限流值，或者升***元的第四电流互感器CT4检测电流值与非升***元的第八电流互感器CT4检测电流值的差值超过阈值达到预设时间时，确定连接所述第四电流互感器第二端与所述第八电流互感器第二端的贯穿母线(第④段)出现接地故障；控制第一主断路器断开，第一高压隔离开关和第二高压隔离开关断开；在第一高压隔离开关和第二高压隔离开关断开后，控制第一主断路器闭合。禁止接地故障部位二次接入。In one embodiment, the control unit is used to determine that a ground fault occurs in the through bus (section ④) connecting the second end of the fourth current transformer and the second end of the eighth current transformer when the current value detected by the fourth current transformer CT4 of the bow-raising unit exceeds the second current limiting value for a preset time, and the current value detected by the eighth current transformer CT4 of the non-bow-raising unit does not exceed the second current limiting value, or the difference between the current value detected by the fourth current transformer CT4 of the bow-raising unit and the current value detected by the eighth current transformer CT4 of the non-bow-raising unit exceeds the threshold for a preset time; control the first main circuit breaker to be disconnected, the first high-voltage disconnector to be disconnected, and the second high-voltage disconnector to be disconnected; after the first high-voltage disconnector and the second high-voltage disconnector are disconnected, control the first main circuit breaker to be closed. Secondary access to the ground fault site is prohibited.
在一个实施例中，控制单元用于在非升***元的第八电流互感器CT4检测电流值超过第二限流值达到预设时间，或者非升***元的第八电流互感器CT4检测电流值与第六电流互感器CT2检测电流值的差值超过阈值达到预设时间时，确定第二主断单元(第⑤段)出现接地故障；控制第一主断路器断开，第一高压隔离开关和第二高压隔离开关断开，在第一高压隔离开关和第二高压隔离开关断开后，控制第一主断路器闭合。禁止接地故障部位二次投入。In one embodiment, the control unit is used to determine that the second main breaking unit (section ⑤) has a ground fault when the current value detected by the eighth current transformer CT4 of the non-rising unit exceeds the second current limit value for a preset time, or the difference between the current value detected by the eighth current transformer CT4 of the non-rising unit and the current value detected by the sixth current transformer CT2 exceeds the threshold for a preset time; control the first main circuit breaker to be disconnected, the first high-voltage disconnector and the second high-voltage disconnector to be disconnected, and control the first main circuit breaker to be closed after the first high-voltage disconnector and the second high-voltage disconnector are disconnected. It is forbidden to put the ground fault part into operation again.
在一个实施例中，控制单元用于在非升***元的第六电流互感器CT2检测电流值或第七电流互感器CT3检测电流值超过第二限流值达到预设时间时；或者非升***元的第六电流互感器CT2检测电流值与第七电流互感器CT3检测电流值的差值超过阈值达到预设时间时，确定所述第二变压器单元(第⑥段)出现接地故障；控制第一主断路器断开，第一高 压隔离开关和第二高压隔离开关断开，在第一高压隔离开关和第二高压隔离开关断开后，控制第一主断路器闭合。禁止接地部位二次投入。In one embodiment, the control unit is used to determine that the second transformer unit (section ⑥) has a ground fault when the current value detected by the sixth current transformer CT2 of the non-bow-raising unit or the current value detected by the seventh current transformer CT3 exceeds the second current limit value for a preset time; or when the difference between the current value detected by the sixth current transformer CT2 of the non-bow-raising unit and the current value detected by the seventh current transformer CT3 exceeds the threshold for a preset time; control the first main circuit breaker to disconnect, the first high-voltage disconnector and the second high-voltage disconnector to disconnect, and after the first high-voltage disconnector and the second high-voltage disconnector are disconnected, control the first main circuit breaker to close. It is forbidden to put the grounding part into operation twice.
第二限流值小于第一限流值。示例性的，第一限流值可以为500A，第二限流值可以为250A。The second current limit value is smaller than the first current limit value. For example, the first current limit value may be 500A, and the second current limit value may be 250A.
不同车型可根据整车功率、额定电流、采样频率、网络传输时间等差异，设置不同的限流值和预设时间。Different vehicle models can set different current limiting values and preset times based on differences in vehicle power, rated current, sampling frequency, network transmission time, etc.
本说明书中各个实施例采用递进的方式描述，每个实施例重点说明的都是与其他实施例的不同之处，各个实施例之间相同相似部分互相参见即可。The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.
对所公开的实施例的上述说明，使本领域专业技术人员能够实现或使用本实用新型。对这些实施例的多种修改对本领域的专业技术人员来说将是显而易见的，本文中所定义的一般原理可以在不脱离本实用新型的精神或范围的情况下，在其它实施例中实现。因此，本实用新型将不会被限制于本文所示的这些实施例，而是要符合与本文所公开的原理和新颖特点相一致的最宽的范围。The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

  1. 一种动车接地故障定位控制***，其特征在于，包括：控制单元、升***元和非升***元，所述升***元包括第一受电***元、第一主断单元、第一变压器单元、第一电流互感器、第二电流互感器、第三电流互感器和第四电流互感器；第一受电***元接入接触网，第一受电***元经过第一电流互感器与第一主断单元连接；第一主断单元经过第二电流互感器与第一变压器单元连接；所述第一变压器单元经过第三电流互感器接地；A motor vehicle ground fault location control system, characterized in that it comprises: a control unit, a pantograph raising unit and a non-pantograph raising unit, wherein the pantograph raising unit comprises a first pantograph unit, a first main breaking unit, a first transformer unit, a first current transformer, a second current transformer, a third current transformer and a fourth current transformer; the first pantograph unit is connected to the overhead line, and the first pantograph unit is connected to the first main breaking unit via the first current transformer; the first main breaking unit is connected to the first transformer unit via the second current transformer; the first transformer unit is grounded via the third current transformer;
    所述非升***元包括第二受电***元、第二主断单元和第二变压器单元、第五电流互感器、第六电流互感器、第七电流互感器和第八电流互感器；第二受电***元经过第五电流互感器与第二主断单元连接；第二主断单元经过第六电流互感器与第二变压器单元连接；所述第二变压器单元经过第七电流互感器接地；The non-pantograph unit includes a second pantograph unit, a second main breaking unit and a second transformer unit, a fifth current transformer, a sixth current transformer, a seventh current transformer and an eighth current transformer; the second pantograph unit is connected to the second main breaking unit through the fifth current transformer; the second main breaking unit is connected to the second transformer unit through the sixth current transformer; the second transformer unit is grounded through the seventh current transformer;
    所述第四电流互感器第二端与所述第八电流互感器第二端通过贯穿母线连接；The second end of the fourth current transformer is connected to the second end of the eighth current transformer via a through bus;
    控制单元用于根据各电流互感器的电流检测值控制确定故障位置，并控制升***元和/或非升***元执行预设保护动作。The control unit is used to control and determine the fault location according to the current detection value of each current transformer, and control the pantograph unit and/or the non-pantograph unit to perform a preset protection action.
  2. 根据权利要求1所述的控制***，其特征在于，所述第一主断单元包括：The control system according to claim 1, characterized in that the first main breaking unit comprises:
    第一电压互感器、第一主断路器、第一接地开关、第一高压隔离开关和第二避雷器；A first voltage transformer, a first main circuit breaker, a first grounding switch, a first high-voltage disconnector and a second lightning arrester;
    所述第一电流互感器第一端与所述第一受电弓输出端连接，所述第一电流互感器第二端分别与第一电压互感器第一端、第一主断路器第一端连接；所述第一电压互感器第二端接地；所述第一主断路器与第一接地开关并联连接；所述第一主断路器第二端分别与第二避雷器第一端、第一高压隔离开关第一端、第二电流互感器第一端连接；第二避雷器第二端接地；第一高压隔离开关第二端与第四电流互感器第一端连接；The first end of the first current transformer is connected to the output end of the first pantograph, and the second end of the first current transformer is respectively connected to the first end of the first voltage transformer and the first end of the first main circuit breaker; the second end of the first voltage transformer is grounded; the first main circuit breaker is connected in parallel with the first grounding switch; the second end of the first main circuit breaker is respectively connected to the first end of the second lightning arrester, the first end of the first high-voltage disconnector, and the first end of the second current transformer; the second end of the second lightning arrester is grounded; the second end of the first high-voltage disconnector is connected to the first end of the fourth current transformer;
    所述第二主断单元包括：The second main breaking unit comprises:
    第二电压互感器、第二主断路器、第二接地开关、第二高压隔离开关和第四避雷器；a second voltage transformer, a second main circuit breaker, a second grounding switch, a second high-voltage disconnector and a fourth lightning arrester;
    所述第五电流互感器第一端与所述第二受电弓输出端连接，所述第五电流互感器第二端分别与第二电压互感器第一端、第二主断路器第一端连接；所述第二电压互感器第二端接地；所述第二主断路器与第二接地开关并联连接；所述第二主断路器第二端分别与第四避雷器第一端、第二高压隔离开关第一端、第六电流互感器第一端连接；第四避雷器第二端接地；第二高压隔离开关第二端与第八电流互感器第一端连接。The first end of the fifth current transformer is connected to the output end of the second pantograph, and the second end of the fifth current transformer is respectively connected to the first end of the second voltage transformer and the first end of the second main circuit breaker; the second end of the second voltage transformer is grounded; the second main circuit breaker is connected in parallel with the second grounding switch; the second end of the second main circuit breaker is respectively connected to the first end of the fourth lightning arrester, the first end of the second high-voltage disconnector, and the first end of the sixth current transformer; the second end of the fourth lightning arrester is grounded; the second end of the second high-voltage disconnector is connected to the first end of the eighth current transformer.
  3. 根据权利要求1所述的***，其特征在于，所述第一受电***元包括：第一受电弓、第一避雷器；所述第一受电弓输入端与接触网连接，所述第一受电弓输出端通过所述第一避雷器接地。The system according to claim 1 is characterized in that the first pantograph unit comprises: a first pantograph and a first lightning arrester; the first pantograph input end is connected to the overhead line, and the first pantograph output end is grounded through the first lightning arrester.
  4. 根据权利要求1所述的***，其特征在于，所述第二受电***元包括：第二受电弓、第三避雷器；所述第一受电弓输入端与接触网连接，所述第一受电弓输出端通 过所述第三避雷器接地。The system according to claim 1 is characterized in that the second pantograph unit comprises: a second pantograph and a third lightning arrester; the first pantograph input end is connected to the contact network, and the first pantograph output end is grounded through the third lightning arrester.
  5. 根据权利要求2所述的***，其特征在于，所述控制单元用于在各电流互感器检测电流值未超过对应的限流值，且第一电压互感器检测到接触网跳闸断电时，确定第一受电***元出现接地故障；控制第一主断路器断开，第一受电弓切除与接触网的连接，控制第二受电弓与接触网连接。The system according to claim 2 is characterized in that the control unit is used to determine that a ground fault occurs in the first pantograph unit when the current value detected by each current transformer does not exceed the corresponding current limiting value and the first voltage transformer detects that the contact network has tripped and the power is cut off; control the first main circuit breaker to disconnect, the first pantograph to cut off the connection with the contact network, and control the second pantograph to connect to the contact network.
  6. 根据权利要求2所述的***，其特征在于，所述控制单元用于在第一电流互感器检测电流值超过第一限流值达到预设时间，或者第一电流互感器检测电流值与升***元第二电流互感器检测电流值和第四电流互感器检测电流值差值超过阈值达到预设时间，确定第一主断单元出现接地故障；控制第一主断路器断开，第一受电弓切除与接触网的连接，第一高压隔离开关和第二高压隔离开关断开；在第一高压隔离开关和第二高压隔离开关断开后，控制第二受电弓与接触网连接，第二主断路器闭合。The system according to claim 2 is characterized in that the control unit is used to determine that a ground fault occurs in the first main breaking unit when the current value detected by the first current transformer exceeds the first current limiting value for a preset time, or the difference between the current value detected by the first current transformer and the current value detected by the second current transformer of the pantograph unit and the current value detected by the fourth current transformer exceeds a threshold value for a preset time; control the first main circuit breaker to disconnect, the first pantograph to cut off the connection with the contact network, and the first high-voltage disconnector and the second high-voltage disconnector to disconnect; after the first high-voltage disconnector and the second high-voltage disconnector are disconnected, control the second pantograph to connect to the contact network and close the second main circuit breaker.
  7. 根据权利要求2所述的***，其特征在于，所述控制单元用于在第二电流互感器检测电流值或第三电流互感器检测电流值超过第二限流值达到预设时间，或者第二电流互感器检测电流值与第三电流互感器检测电流值的差值超过阈值达到预设时间，确定第一变压器单元出现接地故障；控制第一主断路器断开，第一受电弓切除与接触网的连接，第一高压隔离开关和第二高压隔离开关断开；在第一高压隔离开关和第二高压隔离开关断开后，控制第二受电弓与接触网连接，第二主断路器闭合。The system according to claim 2 is characterized in that the control unit is used to determine that a ground fault occurs in the first transformer unit when the current value detected by the second current transformer or the current value detected by the third current transformer exceeds the second current limiting value for a preset time, or the difference between the current value detected by the second current transformer and the current value detected by the third current transformer exceeds a threshold value for a preset time; control the first main circuit breaker to disconnect, the first pantograph to cut off the connection with the contact network, and the first high-voltage disconnector and the second high-voltage disconnector to disconnect; after the first high-voltage disconnector and the second high-voltage disconnector are disconnected, control the second pantograph to connect to the contact network and close the second main circuit breaker.
  8. 根据权利要求2所述的***，其特征在于，所述控制单元用于在第四电流互感器检测电流值超过第二限流值达到预设时间，且第八电流互感器检测电流值未超过第二限流值，或者第四电流互感器检测电流值与第八电流互感器检测电流值的差值超过阈值达到预设时间时，确定连接所述第四电流互感器第二端与所述第八电流互感器第二端的贯穿母线出现接地故障；控制第一主断路器断开，第一高压隔离开关和第二高压隔离开关断开；在第一高压隔离开关和第二高压隔离开关断开后，控制第一主断路器闭合。The system according to claim 2 is characterized in that the control unit is used to determine that a ground fault occurs in the through bus connecting the second end of the fourth current transformer and the second end of the eighth current transformer when the current value detected by the fourth current transformer exceeds the second current limiting value for a preset time and the current value detected by the eighth current transformer does not exceed the second current limiting value, or the difference between the current value detected by the fourth current transformer and the current value detected by the eighth current transformer exceeds a threshold for a preset time; control the first main circuit breaker to be disconnected, and the first high-voltage disconnector and the second high-voltage disconnector to be disconnected; and control the first main circuit breaker to be closed after the first high-voltage disconnector and the second high-voltage disconnector are disconnected.
  9. 根据权利要求2所述的***，其特征在于，所述控制单元用于在第八电流互感器检测电流值超过第二限流值达到预设时间，或者第八电流互感器检测电流值与第六电流互感器检测电流值的差值超过阈值达到预设时间时，确定第二主断单元出现接地故障；控制第一主断路器断开，第一高压隔离开关和第二高压隔离开关断开，在第一高压隔离开关和第二高压隔离开关断开后，控制第一主断路器闭合。The system according to claim 2 is characterized in that the control unit is used to determine that a ground fault occurs in the second main breaking unit when the current value detected by the eighth current transformer exceeds the second current limiting value for a preset time, or the difference between the current value detected by the eighth current transformer and the current value detected by the sixth current transformer exceeds a threshold for a preset time; control the first main circuit breaker to be disconnected, the first high-voltage disconnecting switch and the second high-voltage disconnecting switch to be disconnected, and after the first high-voltage disconnecting switch and the second high-voltage disconnecting switch are disconnected, control the first main circuit breaker to be closed.
  10. 根据权利要求2所述的***，其特征在于，所述控制单元用于在第六电流互感器检测电流值或第七电流互感器检测电流值超过第二限流值达到预设时间时；或者第六电流互感器检测电流值与第七电流互感器检测电流值的差值超过阈值达到预设时间时，确定所述第二变压器单元出现接地故障；控制第一主断路器断开，第一高压隔离开关和第二高压隔离开关断开，在第一高压隔离开关和第二高压隔离开关断开后，控制第一主断路器闭合。The system according to claim 2 is characterized in that the control unit is used to determine that a ground fault occurs in the second transformer unit when the current value detected by the sixth current transformer or the current value detected by the seventh current transformer exceeds the second current limiting value for a preset time; or when the difference between the current value detected by the sixth current transformer and the current value detected by the seventh current transformer exceeds a threshold for a preset time; control the first main circuit breaker to be disconnected, the first high-voltage disconnector and the second high-voltage disconnector to be disconnected, and after the first high-voltage disconnector and the second high-voltage disconnector are disconnected, control the first main circuit breaker to be closed.
PCT/CN2022/135348 2022-11-25 2022-11-30 Emu ground fault positioning control system WO2024108628A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202223152255.9U CN218594139U (en) 2022-11-25 2022-11-25 Motor car ground fault positioning control system
CN202223152255.9 2022-11-25

Publications (1)

Publication Number Publication Date
WO2024108628A1 true WO2024108628A1 (en) 2024-05-30

Family

ID=85408078

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2022/135348 WO2024108628A1 (en) 2022-11-25 2022-11-30 Emu ground fault positioning control system

Country Status (2)

Country Link
CN (1) CN218594139U (en)
WO (1) WO2024108628A1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011166961A (en) * 2010-02-10 2011-08-25 Toshiba Corp Ac electric-train
CN108773301A (en) * 2018-06-13 2018-11-09 株洲时代电子技术有限公司 A kind of contact net power supply high-pressure system control method and its application
CN109318720A (en) * 2017-12-13 2019-02-12 中车长春轨道客车股份有限公司 A kind of multi-standard EMU high voltage supply system and train
CN112339566A (en) * 2019-08-07 2021-02-09 中车唐山机车车辆有限公司 Main line detection system of high-voltage system of motor train unit
CN112526253A (en) * 2020-11-03 2021-03-19 中车青岛四方机车车辆股份有限公司 Overcurrent fault detection system and method and railway vehicle
CN115009028A (en) * 2022-06-29 2022-09-06 中车长春轨道客车股份有限公司 Control method for double high-voltage units of four-marshalling intercity motor train unit

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011166961A (en) * 2010-02-10 2011-08-25 Toshiba Corp Ac electric-train
CN109318720A (en) * 2017-12-13 2019-02-12 中车长春轨道客车股份有限公司 A kind of multi-standard EMU high voltage supply system and train
CN108773301A (en) * 2018-06-13 2018-11-09 株洲时代电子技术有限公司 A kind of contact net power supply high-pressure system control method and its application
CN112339566A (en) * 2019-08-07 2021-02-09 中车唐山机车车辆有限公司 Main line detection system of high-voltage system of motor train unit
CN112526253A (en) * 2020-11-03 2021-03-19 中车青岛四方机车车辆股份有限公司 Overcurrent fault detection system and method and railway vehicle
CN115009028A (en) * 2022-06-29 2022-09-06 中车长春轨道客车股份有限公司 Control method for double high-voltage units of four-marshalling intercity motor train unit

Also Published As

Publication number Publication date
CN218594139U (en) 2023-03-10

Similar Documents

Publication Publication Date Title
CN101540501B (en) Ground electrode circuit protective system and device of high-voltage DC transmission system
CN110729709B (en) 110kV line disconnection relay protection method for measuring neutral point voltage of transformer
CN111668922B (en) 10kV spare power automatic switching action method for transformer substation
CN101383504B (en) Intelligent auto-reclosing valve suitable for bus of 220kV voltage grade or above
CN111817281B (en) Switching control system and method for arc suppression coil parallel low-resistance grounding device
WO2024108628A1 (en) Emu ground fault positioning control system
CN203522177U (en) Arc extinction device for eliminating interphase short circuit in single-resistance method
CN110297139B (en) Rail vehicle network side fault point detection device and method
Panasetsky et al. On the problem of shunt reactor tripping during single-and three-phase auto-reclosing
CN209562151U (en) A kind of busbar voltage double protecting device based on vortex drive-type fast breaker
CN208522450U (en) Ground protection circuit and motor power supply system
Hara et al. Fault protection of metallic return circuit of Kii channel HVDC system
CN110739670A (en) 110kV line disconnection relay protection method for comparing voltages at two sides of line
CN212969055U (en) GIS line side quick grounding switch locking device
Wang et al. The application of equipment overheating and arcing fault warning and protection systems of switchgear in power systems
CN217036738U (en) Short-circuit protection configuration structure of high-voltage station transformer
CN212462780U (en) Single-phase earth fault compensation and transfer device of power distribution network
CN219247471U (en) Join in marriage quick protection switch of network overhead line disconnection trouble
CN219697303U (en) Bus residual voltage temporary electricity holding device
CN201213224Y (en) Over-current protecting equipment for voltage mutual inductor
CN203027151U (en) Frequency converter
CN113013857B (en) 220kV inner bridge connection transformer substation circuit breaker failure relay protection method
CN112117742B (en) Device and method for effectively isolating faults of power utilization user equipment by adopting load switch
Zhao et al. Research and Application on the Neutral Grounding Mode in Tianjin Distribution Network
Naumkin et al. Methods of Performance Assurance for SF6 Circuitbreakers at Switchings of Compensated 500–1150 kV Overhead Power Lines