WO2021068363A1 - Système de protection haute-tension pour un moteur à combustion interne - Google Patents

Système de protection haute-tension pour un moteur à combustion interne Download PDF

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Publication number
WO2021068363A1
WO2021068363A1 PCT/CN2019/119864 CN2019119864W WO2021068363A1 WO 2021068363 A1 WO2021068363 A1 WO 2021068363A1 CN 2019119864 W CN2019119864 W CN 2019119864W WO 2021068363 A1 WO2021068363 A1 WO 2021068363A1
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WO
WIPO (PCT)
Prior art keywords
voltage
bus
resistor
discharge
circuit
Prior art date
Application number
PCT/CN2019/119864
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English (en)
Chinese (zh)
Inventor
刘谆
葸代其
杨惠兰
王武俊
柴媛
韩建宁
吕新强
Original Assignee
中车永济电机有限公司
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Publication date
Application filed by 中车永济电机有限公司 filed Critical 中车永济电机有限公司
Publication of WO2021068363A1 publication Critical patent/WO2021068363A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
    • H02H9/041—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage using a short-circuiting device
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/0084—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring voltage only
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection

Definitions

  • the invention relates to high-pressure protection of high-voltage equipment on locomotives, in particular to a high-pressure protection system for diesel locomotives.
  • the purpose of the present invention is to provide a high-voltage protection system for diesel locomotive traction-auxiliary converters, which can realize comprehensive protection functions such as power-on warning of high-voltage electrical cabinets, automatic shutdown when doors are opened, and automatic discharge when shutdown.
  • a high-voltage protection system for diesel locomotives includes a chopper discharge circuit and a cabinet door state detection circuit.
  • the chopper discharge circuit includes a bridge arm formed by two IGBTs connected in series.
  • the bridge arm is connected between the positive and negative ends of the converter cabinet bus.
  • the middle point of the bridge arm is connected to one end of the chopper braking resistor.
  • the other end is connected to the negative end of the bus; after the shutdown, before the control power is cut off, the converter cabinet control unit issues a chopping command, the chopper discharge circuit is opened, the IGBT above the bridge arm is turned on, and the energy stored in the capacitor is passed through the chopper on the locomotive.
  • the wave braking resistor quickly discharges, and the bus voltage drops below the safe voltage.
  • the cabinet door status detection circuit includes a travel switch installed at each cabinet door of the converter cabinet.
  • the travel switch is connected in series on a separate power supply circuit, and the converter cabinet control unit detects the voltage on the power supply circuit. After each cabinet door of the converter cabinet is closed, the travel switch is closed, and the control unit detects a low voltage. When any cabinet door is opened, the power supply circuit is disconnected, and the control unit detects a high voltage.
  • control unit When the control unit detects that a cabinet door is not closed when starting the machine, the control unit sends a signal to the locomotive network control system, the converter cabinet start button is invalid, and the main generator is prohibited from starting; when the power is on, the control unit detects When the cabinet door is opened, the control unit sends a signal to the locomotive network control system, and the locomotive network control system controls the converter cabinet to immediately stop and unload, and stop the main generator at the same time.
  • the slow discharge circuit includes a slow discharge resistor connected to both ends of the bus. In the event that the chopper discharge circuit fails or the control unit is powered off, the slow discharge circuit will automatically discharge the energy stored in the capacitor , To reduce the bus voltage below the safe voltage.
  • the manual discharge circuit includes a manual discharge switch and a manual discharge resistor.
  • the branch circuit after the manual discharge switch and the manual discharge resistor are connected is connected to both ends of the bus.
  • the cabinet door After the shutdown, the cabinet door needs to be opened for maintenance. Discharge through the manual discharge switch and turn on the manual discharge circuit to perform the discharge operation. It is required to turn the manual discharge switch to the discharge position to open the cabinet door. When the manual discharge switch is in the discharge position, it is not allowed to start the machine.
  • a bus voltage detection circuit which includes a bus voltage sensor, and the bus voltage sensor is connected between the positive and negative ends of the bus to detect the bus voltage.
  • the voltage signal detected by the bus voltage sensor is transmitted to the display screen of the converter cabinet, and the display screen displays the detected bus voltage.
  • the bus voltage detection circuit further includes a ground detection voltage sensor, a ground detection resistance branch, the ground detection resistance branch includes three resistors with equal resistance values connected in series, and the ground detection resistance branch is connected between the positive and negative ends of the bus ,
  • the third resistor is connected in parallel with the grounding detection voltage sensor, and the second resistor and the third resistor are grounded.
  • the signal detected by the grounding detection voltage sensor is also transmitted to the display of the converter cabinet.
  • the display shows the voltage across the detected third resistor.
  • the voltage detected by the grounding detection voltage sensor is the bus voltage sensor.
  • One-third of the detection voltage If one end of the busbar is grounded, the voltage detected by the ground detection voltage sensor changes, which can alert the staff.
  • the bus voltage detection circuit also includes a diode high-voltage warning light, which is connected to both ends of the bus, and automatically lights up when the bus voltage is higher than the safe voltage.
  • the chopper discharge circuit, the slow discharge circuit and the manual discharge circuit form the triple discharge circuit of the system.
  • the invention effectively reduces the possibility of high-pressure injury accidents, and protects personal and property safety to the greatest possible extent.
  • FIG. 1 is a block diagram of the present invention.
  • Figure 2 is the main circuit diagram of the system.
  • the high-voltage protection system of the present invention includes a control unit, a busbar voltage detection circuit, a triple discharge circuit, and a cabinet door status detection circuit.
  • the triple discharge circuit includes a chopper discharge circuit, a slow discharge circuit and a manual discharge circuit. All circuits are integrated in the traction-auxiliary circuit. In the converter.
  • the cabinet door status detection circuit is composed of a travel switch on the cabinet door of the converter cabinet.
  • the control unit detects that the cabinet door is not closed, the control unit issues an alarm to remind the staff to stop starting, and notify the locomotive network control system to prohibit the main generator from starting; when the power is on, the control unit detects the cabinet
  • the control unit issues an alarm to remind the staff to stop and unload immediately, and at the same time notify the locomotive network control system to stop the main generator.
  • the bus voltage detection circuit monitors the DC bus voltage in the high-voltage electrical cabinet in real time, and transmits the measured data to the control unit. When the voltage is higher than 50V, the high-voltage warning light automatically lights up.
  • the control unit After stopping, before the control power is cut off, the control unit issues a chopping command, the chopping circuit is opened, and the energy stored in the capacitor is quickly discharged through the chopper braking resistor on the locomotive, and the bus voltage is reduced to below 50V within 2 minutes .
  • the slow discharge circuit will automatically discharge the energy stored in the capacitor, and the bus voltage will drop below 50V within 10 minutes.
  • the cabinet door can be opened only when the manual discharge switch is in the discharge position.
  • the control unit is not allowed to start the machine.
  • Each circuit structure in the high-voltage protection system is as follows:
  • the cabinet door status detection circuit includes a travel switch installed at each cabinet door of the converter cabinet.
  • the travel switch is connected in series on the power supply circuit.
  • the control unit detects the voltage on the power supply circuit. After each cabinet door of the converter cabinet is closed, the travel switch closes and controls The unit detects a low voltage. When any cabinet door is opened, the power supply circuit is disconnected, and the control unit detects a high voltage.
  • the bus voltage detection circuit includes a bus voltage sensor, a ground detection voltage sensor, a ground detection resistance branch and a diode high-voltage warning light.
  • the bus voltage sensor is connected to the bus to detect the bus voltage
  • the ground detection resistance branch includes three series connected with equal resistance. Two resistors, the grounding detection resistor branch is connected to both ends of the bus, the third resistor is connected in parallel with the grounding detection voltage sensor, the second resistor and the third resistor are grounded, and the diode high-voltage warning light is connected to both ends of the bus. It will automatically light up when the bus voltage is higher than 50V.
  • the voltage signal detected by the bus voltage sensor is transmitted to the display of the converter cabinet, and the display shows the detected bus voltage; the signal detected by the grounding detection voltage sensor is also transmitted to the display of the converter, and the display shows the third resistance detected.
  • the voltage at both ends, when both ends of the bus are not grounded, the voltage detected by the ground detection voltage sensor is one-third of the voltage detected by the bus voltage sensor. If one end of the bus is grounded, the voltage detected by the ground detection voltage sensor changes. Can remind the staff.
  • the chopper discharge circuit includes a bridge arm formed by two IGBTs connected in series. The middle point of the bridge arm is connected to one end of the chopper braking resistor, and the other end of the chopper braking resistor is connected to the lower plate of the bus capacitor.
  • the control unit issues a chopping command, the IGBT above the chopping circuit is turned on, and the energy stored in the capacitor is quickly discharged through the chopper braking resistor, and the bus voltage is reduced to below 50V within 2 minutes.
  • the slow discharge circuit includes slow discharge resistors connected at both ends of the bus. In the event of a failure of the chopper circuit or a power failure of the control unit, the slow discharge circuit will automatically discharge the energy stored in the capacitor and reduce the bus voltage to 50V within 10 minutes the following.
  • the manual discharge circuit includes a manual discharge switch and a manual discharge resistor.
  • the branch circuit after the manual discharge switch and the manual discharge resistor are connected is connected to the two ends of the bus.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

Système de protection haute-tension pour un moteur à combustion interne. Le système comprend une unité de commande, un circuit de détection de tension de bus, une triple boucle de décharge et un circuit de détection d'état de porte d'armoire, la triple boucle de décharge comprenant également une boucle à décharge de hacheur, une boucle à décharge lente et une boucle à décharge manuelle ; et tous les circuits sont intégrés dans un convertisseur auxiliaire de traction. Le système de protection haute-tension pour une locomotive à combustion interne peut réaliser des fonctions de protection complète, tel qu'un avertissement de mise sous tension d'armoire d'appareil électrique haute-tension, une interruption automatique une fois qu'une porte est ouverte, et une décharge automatique en cas d'interruption, réduit efficacement le risque d'accidents corporels haute-tension, et assure une sécurité personnelle et de propriété à l'étendue maximale.
PCT/CN2019/119864 2019-10-12 2019-11-21 Système de protection haute-tension pour un moteur à combustion interne WO2021068363A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201910969001.XA CN110797852A (zh) 2019-10-12 2019-10-12 一种内燃机车用高压防护系统
CN201910969001.X 2019-10-12

Publications (1)

Publication Number Publication Date
WO2021068363A1 true WO2021068363A1 (fr) 2021-04-15

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WO (1) WO2021068363A1 (fr)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
CN113949140A (zh) * 2021-11-24 2022-01-18 中车大连机车车辆有限公司 一种防止蓄电池充电过压的软件控制方法

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* Cited by examiner, † Cited by third party
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CN113991628B (zh) * 2021-11-24 2023-05-02 中车大连机车车辆有限公司 主辅一体式内燃机车应急放电控制方法

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CN2269672Y (zh) * 1996-06-25 1997-12-03 中国航天工业总公司第一研究院第十五研究所 高压高频大功率斩波器
JP2009022156A (ja) * 2007-07-13 2009-01-29 Xerox Corp 三相モータの少なくとも２本のリード線内の電流を検知するための回路及び方法
CN201946978U (zh) * 2010-12-28 2011-08-24 天津电气传动设计研究所 一种从高压直流母线取电的电路
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113949140A (zh) * 2021-11-24 2022-01-18 中车大连机车车辆有限公司 一种防止蓄电池充电过压的软件控制方法
CN113949140B (zh) * 2021-11-24 2023-11-10 中车大连机车车辆有限公司 一种防止蓄电池充电过压的软件控制方法

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