WO2019104504A1

WO2019104504A1 - Low emission and environmentally friendly switcher power source of dual diesel generator set and power supply method thereof

Info

Publication number: WO2019104504A1
Application number: PCT/CN2017/113447
Authority: WO
Inventors: 孟玉发; 刘顺国; 叶顶康; 何国福
Original assignee: 中车资阳机车有限公司
Priority date: 2017-11-29
Filing date: 2017-11-29
Publication date: 2019-06-06

Abstract

A low emission and environmentally friendly switcher power source of a dual diesel generator set, comprising a diesel generator set 1 having a relatively low power, a diesel generator set 2 having a relatively high power, a traction converter, and a locomotive power battery system. Alternating currents (AC) from two diesel generator sets are rectified by means of an AC/direct current (DC) conversion module in the traction converter and filtered by means of the supporting capacity into DCs. Two poles of the supporting capacity are connected to a power battery of the locomotive power battery system. A locomotive microcomputer controls an excitation drive module of the diesel generator set 2 according to information provided by a driver controller. Two diesel generator sets having different powers are used for the power source. The diesel generator set 1 having a low power operates at a rated power for a long time, and the diesel generator set 2 having a high power are started only when a fault occurs to the locomotive power battery system, or a short distance traction operation or a large load switching traction operation is executed. The power source is low emission and environmentally friendly.

Description

Power source of double-diesel generator set shunting locomotive with low emission and high environmental protection and power supply method thereof

Technical field

The invention relates to a dual diesel generator set shunting locomotive power, adopting two diesel generator sets, has the characteristics of low emission and high environmental protection, and belongs to the technical field of rail transit.

Background technique

At present, domestic and foreign oil-electric hybrid locomotive locomotives are composed of a diesel generator set and a power battery, as shown in Figure 1. Regardless of whether the locomotive diesel generator set and the power battery are lightly mixed or moderately or heavily mixed, the power of the on-board diesel generator set is quite large, and it is quite difficult to achieve low emissions and high environmental protection.

Summary of the invention

The object of the present invention is to provide a low-emission and high-environment dual-diesel generator set shunting locomotive power source and a power supply method thereof.

The technical solution adopted by the present invention is as follows:

A low-emission and high-environment dual-diesel generator set shunting locomotive power source, comprising a diesel generator set, a traction converter and a locomotive power battery system, wherein the alternating current generated by the diesel generator set passes through an AC/DC in the traction converter The conversion module rectifies and filters the DC power through the supporting capacitor, and the supporting capacitor poles are connected with the power battery of the locomotive power battery system. The diesel generator set has two sets, respectively, which are relatively small power diesel generator sets 1 and relatively large power. The output of the diesel generator set 2, the diesel generator set 1 is controlled by the switch 1, the output of the diesel generator set 2 is controlled by the switch 2, and the locomotive microcomputer controls the excitation drive module of the diesel generator set 2 based on the information provided by the driver controller.

The output power of the shunting locomotive is the information provided by the locomotive microcomputer according to the driver controller's given value and the power battery management system through the network system, and then the network system sends instructions to the DUC controller in the traction converter, which is controlled by the DCU controller. The DC/AC electronic switch in the traction converter brings the straightness of the intermediate link The galvano is converted into an alternating current to drive the traction motor, and a switch 3 is provided on the circuit between the power battery and the supporting capacitor. .

The lower power diesel generator set 1 has a power range of 50 kW to 200 kW, and the higher power diesel generator set 2 has a power range of 300 kW to 2000 kW.

The power battery loading capacity is from 100 kW.h to 2000 kW.h.

The invention also provides a power supply method for a low-emission and high-environment dual-diesel generator set shunting locomotive power source, specifically: when the power battery can separately supply the traction load, the switch 1 is closed, the switch 2 is disconnected, and the switch 3 closed, the diesel generator set 2 is turned off, the diesel generator set 1 works for a long time at the rated power, and the generated alternating current is rectified and filtered into a direct current by the AC/DC conversion module and the supporting capacitor in the traction converter, and then the power battery is replenished. The DC power output from the power battery is converted into AC power by the DC/AC electronic switch to drive the traction motor.

The invention also provides a power supply method for a low-emission and high-environment dual-diesel generator set shunting locomotive power source, specifically: when the locomotive performs a small operation traction operation or a large load shunting traction operation and the locomotive traction load power is greater than the diesel power generation In unit 2, switch 1, switch 2 and switch 3 are closed, diesel generator set 1 and diesel generator set 2 are all fully operational, and alternating current from diesel generator sets 1 and 2 is passed through the AC/DC converter module in the traction converter and The supporting capacitor is rectified and filtered to be mixed with the power battery power source, and the insufficient part of the power is supplemented by the power battery, and then converted into alternating current by the DC/AC electronic switch to drive the traction motor.

The invention also provides a power supply method for a low-emission and high-environment dual-diesel generator set shunting locomotive power source, specifically: when the locomotive performs small operation traction operation or large load shunting traction operation and the locomotive traction load power is less than diesel power generation In unit 2, switch 1, switch 2 and switch 3 are closed, diesel generator set 1 and diesel generator set 2 are all fully operational, and alternating current from diesel generator sets 1 and 2 is passed through the AC/DC converter module in the traction converter and Support capacitor rectification and filtering into DC, one of which The divided power is then converted to AC by a DC/AC electronic switch for driving the traction motor, and the remaining power of the diesel generator set 2 is used to replenish the power battery.

The invention also provides a power supply method for a low-emission and high-environment dual-diesel generator set shunting locomotive power source, specifically: when the locomotive power battery system fails, the switch 1 is disconnected, the switch 2 is closed, and the switch 3 is disconnected. The diesel generator set 1 is turned off, the diesel generator set 2 is started, and the locomotive microcomputer controls the excitation drive module of the diesel generator set 2 according to the given value of the driver controller to control the output power of the diesel generator set 2, and the alternating current generated by the diesel generator set 2 The AC/DC converter module and the supporting capacitor in the traction converter are rectified and filtered into DC power, and then converted into AC power by the DC/AC electronic switch to drive the traction motor to ensure that the locomotive can continue to operate.

Among the above four methods, the locomotive microcomputer sends a command to the DUC controller according to the information provided by the power battery management system of the locomotive power battery system, and controls the DC/AC electronic switch through the DUC controller.

In summary, due to the adoption of the above technical solutions, the beneficial effects of the present invention are:

1. The key technology lies in the combination of two diesel generator sets with different power levels and power batteries. The diesel generators with lower power can work at the rated power for a long time. The diesel generators with higher power only work in the small operation of the locomotives. It can work only when the load is overloaded and the vehicle has low emission and high environmental protection. This technical means is adopted for the first time;

2. The diesel generator set with low power adopts low-power, low-emission, high-environment diesel engine. When the locomotive is in the shunting operation, the diesel generator set works at the rated power for the power battery to replenish the power throughout the day, and provides auxiliary power for the locomotive. It has the characteristics of low emission and low noise; the locomotive is powered by the power battery only under the condition of small load or medium load;

3. The diesel generator set with high power has the characteristics of high emission and high noise. It only starts when the locomotive power battery system malfunctions, small operation traction operation or large load shunting operation. The diesel engine unit and the power battery Hybrid power is provided to meet the needs of locomotive traction.

DRAWINGS

Figure 1 shows the power system of the existing domestic and foreign hybrid electric power locomotive locomotives.

Figure 2 is a power system of the present invention.

Detailed ways

The present invention will be described in detail below with reference to the accompanying drawings.

Example:

As shown in FIG. 2, a low-emission and high-environment dual-diesel generator set shunting locomotive power source includes a diesel generator set, a traction converter and a locomotive power battery system, and the alternating current generated by the diesel generator set is converted by traction. The AC/DC conversion module in the device is rectified and filtered into a direct current by a supporting capacitor, and the supporting capacitor poles are connected with the power battery of the locomotive power battery system, and the diesel generating set has two sets, respectively, which are relatively low power diesel generating sets 1 And the diesel generator set 2 with relatively large power, the output of the diesel generator set 1 is controlled by the switch 1, the output of the diesel generator set 2 is controlled by the switch 2, and the locomotive microcomputer controls the excitation drive of the diesel generator set 2 according to the information provided by the driver controller. Module.

The power battery loading capacity is from 100 kW.h to 2000 kW.h.

A switch 3 is provided on the circuit between the power battery and the supporting capacitor.

The working mode of the invention is:

1. When the power battery can separately supply the traction load, the switch 1 is closed, the switch 2 is opened, the switch 3 is closed, the diesel generator set 2 is turned off, the diesel generator set 1 is operated at the rated power for a long time, and the alternating current generated is changed by traction. The AC/DC conversion module and the supporting capacitor in the flow device are rectified and filtered into DC power, and then the power battery is replenished with electric power. The DC power output from the power battery is converted into AC power by the DC/AC electronic switch to drive the traction motor.

2. When the locomotive performs small operation traction operation or large load diversion and traction operation and the locomotive traction load power is greater than that of diesel generator set 2, switch 1, switch 2 and switch 3 are closed, and diesel generator set 1 and diesel generator set 2 are fully powered. Working, the alternating current generated by the diesel generator sets 1 and 2 is rectified and filtered by the AC/DC converter module and the supporting capacitor in the traction converter into a direct current and a power battery power supply. The insufficient power is supplemented by the power battery and then passed through the DC/ The AC electronic switch is converted to an alternating current for driving the traction motor.

3. When the locomotive performs small operation traction operation or large load diversion and traction operation and the locomotive traction load power is less than that of diesel generator set 2, switch 1, switch 2 and switch 3 are closed, and diesel generator set 1 and diesel generator set 2 are full. Working, the alternating current from the diesel generator sets 1 and 2 is rectified and filtered into a direct current by the AC/DC converter module and the supporting capacitor in the traction converter, and a part of the power is then converted into alternating current by the DC/AC electronic switch for driving the traction motor. In addition, the remaining power of the diesel generator set 2 supplements the power battery.

4. When the locomotive power battery system fails, the switch 1 is disconnected, the switch 2 is closed, the switch 3 is disconnected, the diesel generator set 1 is turned off, the diesel generator set 2 is started, and the locomotive microcomputer controls the diesel fuel according to the given value of the driver controller. The excitation drive module of the genset 2 controls the output power of the diesel generator set 2, and the alternating current generated by the diesel generator set 2 is rectified and filtered into a direct current by an AC/DC conversion module and a supporting capacitor in the traction converter, and then passed through a DC/AC. The electronic switch is converted into an alternating current for driving the traction motor to ensure that the locomotive can continue to operate.

In the above several cases, the locomotive microcomputer sends instructions to the DUC controller according to the information provided by the power battery management system of the locomotive power battery system, and controls the DC/AC electronic switch through the DUC controller.

Claims

A low-emission and high-environment dual-diesel generator set shunting locomotive power source, comprising a diesel generator set, a traction converter and a locomotive power battery system, wherein the alternating current generated by the diesel generator set passes through an AC/DC in the traction converter The conversion module rectifies and filters the DC power through the supporting capacitor, and the supporting capacitor pole is connected with the power battery of the locomotive power battery system, wherein the diesel generator set has two sets, respectively, which are relatively low power diesel generator sets 1 and power. The relatively large diesel generator set 2, the output of the diesel generator set 1 is controlled by the switch 1, the output of the diesel generator set 2 is controlled by the switch 2, and the locomotive microcomputer controls the excitation drive module of the diesel generator set 2 according to the information provided by the driver controller. A switch 3 is provided on the circuit between the power battery and the supporting capacitor.
The power source of the low-emission and high-environment dual-diesel generator set shunting locomotive according to claim 1, wherein the diesel generator set 1 with a lower power has a power ranging from 50 kW to 200 kW, and the diesel power generation with a larger power is provided. Unit 2 has a power range from 300 kW to 2000 kW.
The power source of the low emission and high environmental protection dual diesel generator set shunting locomotive according to claim 1 or 2, wherein the power battery loading capacity is from 100 kW.h to 2000 kW.h.
A power supply method for a power source of a low-emission and high-environment dual diesel-generator locomotive locomotive according to claim 1, wherein when the power battery is capable of separately supplying power to the traction load, the switch 1 is closed and the switch 2 is disconnected. The switch 3 is closed, the diesel generator set 2 is turned off, the diesel generator set 1 is operated at the rated power for a long time, and the generated alternating current is rectified and filtered into a direct current by the AC/DC conversion module and the supporting capacitor in the traction converter, and then the power battery is supplemented. The electric power, the DC power output from the power battery is converted into AC power by the DC/AC electronic switch to drive the traction motor.
The power supply method for a power source of a low-emission and high-environment dual-diesel generator set shunting locomotive according to claim 1, wherein the locomotive performs a small-running traction operation or a large-load shunting traction operation and the locomotive traction load power is greater than For diesel generator set 2, switch 1, switch 2 and switch 3 are closed, diesel generator set 1 and diesel generator set 2 are fully powered, and diesel generator sets 1 and 2 are issued. The AC power is rectified and filtered by the AC/DC converter module and the supporting capacitor in the traction converter to be mixed with the DC power and the power battery. The insufficient power is supplemented by the power battery, and then converted into AC by the DC/AC electronic switch for driving traction. Motor.
The power supply method for a power source of a low-emission and high-environment dual-diesel generator set shunting locomotive according to claim 1, wherein the locomotive performs a small-running traction operation or a large-load shunting traction operation and the locomotive traction load power is less than In diesel generator set 2, switch 1, switch 2 and switch 3 are closed, diesel generator set 1 and diesel generator set 2 are all fully operational, and alternating current from diesel generator sets 1 and 2 is converted by AC/DC in the traction converter. The module and the supporting capacitor are rectified and filtered into direct current, and a part of the power is then converted into alternating current by the DC/AC electronic switch to drive the traction motor, and the remaining power of the diesel generator set 2 is used to replenish the power battery.
A power supply method for a power source of a low-emission and high-environment dual-diesel generator set shunting locomotive according to claim 1, wherein when the locomotive power battery system fails, the switch 1 is turned off, the switch 2 is closed, and the switch 3 is Disconnected, the diesel generator set 1 is turned off, the diesel generator set 2 is started, and the locomotive microcomputer controls the excitation drive module of the diesel generator set 2 according to the given value of the driver controller to control the output power of the diesel generator set 2, and the diesel generator set 2 is issued. The alternating current is rectified and filtered into a direct current by an AC/DC conversion module and a supporting capacitor in the traction converter, and then converted into an alternating current by a DC/AC electronic switch for driving the traction motor to ensure that the locomotive can continue to operate.
The power supply method for a power source of a low-emission and high-environment dual-diesel generator set shunting locomotive according to claim 4, 5, 6 or 7, wherein the locomotive microcomputer is provided according to a power battery management system of the locomotive power battery system The information is sent to the DUC controller, which controls the DC/AC electronic switch through the DUC controller.