Double-closed-loop rolling test system device and working method

Abstract

The invention provides a double-closed-loop rolling test system device. The double-closed-loop rolling test system device comprises an electric transmission system and a network control system, the electric transmission system and the accompanying electric locomotive realize closed-loop transmission, and the traction / braking working condition test of the locomotive is carried out on a wheel track through the wheel track; the network control system and the accompanying electric locomotive realize MVB communication closed-loop transmission, and the network control system detects the real-time states of the rolling test system device and the accompanying electric locomotive through an MVB bus and controls the rolling test system device and the accompanying electric locomotive in real time. According to the device and method, the locomotive overhaul quality is improved. The locomotive traction performance, the locomotive braking performance and the like are inspected step by step and step by step, various performance indexes of the locomotive can be comprehensively tested, relevant quality problems can be checked and handled in time, and the overall reliability of the locomotive quality is effectively ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle test systems, and in particular to a double closed-loop rolling test system device and a working method. Background Art

[0002] After running a certain number of kilometers, high-power locomotives need to undergo advanced maintenance. After the advanced maintenance, the locomotives must be tested on the factory line and the main line. The main process is: after the locomotive maintenance and static high and low voltage tests are completed, the maintenance section applies to the group company for the main line test run. After the application is approved, on the one hand, the locomotives to be tested will be transferred to the designated location, and on the other hand, the crew and maintenance personnel will be organized to test the main line according to the scheduled route. After the test run is completed, the section will organize the locomotive to be transferred to the Harmonious Maintenance Base of Chengdu Locomotive Depot. The maintenance personnel will solve the problems found in the test run locomotive before the test delivery.

[0003] This model requires the relevant departments responsible for transport production organization to work together, which usually takes 7-10 days at a time, consuming a lot of management resources and production costs. At the same time, it increases the locomotive maintenance downtime and employee workload, greatly increasing the locomotive maintenance cost and cycle. Summary of the invention

[0004] According to the technical problems mentioned in the above background technology, a double closed-loop rolling test system device and a working method are provided. The present invention provides a high-power double closed-loop rolling test system device and a control method, which can achieve the purpose of simulating load test of locomotive on the rolling test system device through double closed loops, and then achieve the purpose of simulating factory line and main line trial operation. By taking ground load test instead of main line trial operation, the locomotive can simulate traction and braking on the line, thereby saving the process of factory line and main line trial operation, reducing locomotive maintenance downtime, reducing personnel workload and saving locomotive maintenance costs.

[0005] The technical means adopted by the present invention are as follows:

[0006] A double closed-loop rolling test system device comprises: an electric transmission system and a network control system; the electric transmission system and a test companion electric locomotive realize closed-loop transmission, and the locomotive traction / braking condition test is performed through wheel-rail; the network control system and the test companion electric locomotive realize MVB communication closed-loop transmission, and the network control system detects the real-time status of the rolling test system device and the test companion locomotive through the MVB bus, and controls the rolling test system device and the test companion locomotive in real time.

[0007] Furthermore, the electric transmission system is a group control system of multiple motors; the electric transmission system provides an adjustable power supply for the test load motor, controls the parameters of the load motor through the network control system and the four-quadrant converter, so that the tested electric locomotive and the test equipment system reach a stable operating point, thereby realizing the simulation of the locomotive's line traction / braking conditions.

[0008] Furthermore, the electric transmission system includes: 1 high-voltage protection cabinet, 1 power grid switch cabinet, 1 high-voltage switch cabinet, 3 transformer cabinets, 6 sets of four-quadrant converters, 6 test load motors and a mobile contact network.

[0009] Furthermore, the network control system connects all the devices of the electric transmission system in series with the bus of the accompanying test locomotive to realize a network control system communication closed loop of the rolling test system device.

[0010] Furthermore, the accompanying electric locomotive and any equipment in the electric transmission system can be interconnected.

[0011] Furthermore, the power grid switch cabinet includes: a vacuum circuit breaker, a high-voltage voltage transformer, a high-voltage side current transformer, a lightning arrester, and a low-voltage side current transformer;

[0012] The vacuum circuit breaker is used to connect or disconnect the high-voltage 25kV incoming line; the high-voltage voltage transformer converts 25kV into a low voltage of 100V, and sends the converted low voltage to the four-quadrant converter as a synchronization signal of the four-quadrant converter and the watt-hour meter used for voltage detection of the power grid;

[0013] The high-voltage side current transformer converts the grid-side current of the system into a small current when it is working, which is used for primary side overcurrent protection; the low-voltage side current transformer converts the grid-side current of the system when it is working into a small current and sends it to the watt-hour meter for the watt-hour meter to detect the current of the grid.

[0014] Furthermore, the four-quadrant converter meets the requirements of long-term stable operation during the test of the locomotive under test, and fully matches the requirements of the traction control unit for the main circuit; the four-quadrant converter includes: a switch cabinet, a single-phase four-quadrant converter, a motor side converter, a secondary filter cabinet, a control cabinet, a resistor cabinet, a water cooling system and a UPS;

[0015] The switch cabinet includes a main circuit breaker of the converter and a charging circuit; the switch cabinet provides input and output switch control and protection for the converter;

[0016] The single-phase four-quadrant converter comprises a main circuit I, a control circuit I and a secondary filter; the single-phase four-quadrant converter controls the DC bus voltage to be stable and feeds back the energy transmitted by the motor-side converter to the power grid;

[0017] The motor-side converter comprises: a main circuit II and a control circuit II; the motor-side converter controls the accompanying test motor;

[0018] The secondary filter cabinet includes: a secondary filter inductor and a capacitor; filtering out 100 Hz harmonics on the DC bus during the operation of the single-phase four-quadrant converter, and maintaining the stability of the DC bus voltage through the secondary filter cabinet;

[0019] The control cabinet includes a traction control unit TCU;

[0020] The resistor cabinet includes two sets of overvoltage absorption resistors for the converter. When the DC bus voltage is too high, the overvoltage on the DC bus is released through the chopper circuit and the chopper resistor to protect the converter components.

[0021] The water cooling system includes: a water cooling tower, a water tank and a pipeline; the water cooling system provides water cooling and heat dissipation for the load converter to ensure the safety of the main circuit;

[0022] The UPS comprises: a UPS host and a battery, and the UPS provides a stable control power supply for the converter control cabinet.

[0023] The present invention also includes a dual closed-loop rolling test system working method, comprising the following steps:

[0024] Step 1: Implement traction and braking test of the electric locomotive through the closed-loop electric drive of the electric drive system;

[0025] Step 2: Implement the control closed loop of the rolling system test device through the communication closed loop of the network control system.

[0026] Furthermore, in step 1, when the electric locomotive under test is in a braking state, the accompanying test motor is in a traction state, which is equivalent to the locomotive under test being in a power generation state. The electricity generated by the locomotive is fed back to the mobile contact network through the locomotive pantograph. The accompanying test motor draws power through the power grid switch cabinet, high-voltage switch cabinet, transformer, and four-quadrant converter in sequence. The accompanying test motor provides traction for the locomotive, and energy is consumed by the accompanying test motor to realize closed-loop electric transmission of the transmission system.

[0027] Furthermore, in step 2, when the traction / braking test of the locomotive under test is carried out, the main control console sends closing instructions to the high-voltage protection cabinet, the power grid switch cabinet, and the high-voltage switch cabinet in sequence through the MVB bus, and then starts the four-quadrant start instruction, and makes the accompanying test motor work in the braking / traction state. Since the network control system communication is in a closed-loop state, if there is a problem with any device in operation, the main control console will release the double closed loop of electric transmission and network control after analysis.

[0028] Compared with the prior art, the present invention has the following advantages:

[0029] The device and method of the present invention effectively shorten the downtime of locomotive maintenance. Usually, it takes about 2 days for a locomotive to be transferred to the delivery location after the trial operation is completed after the maintenance. When the trial operation plan is cancelled due to no traffic, the time is generally extended to 3-4 days. After the ground load test is used instead of the mainline trial operation, the trial operation time of a single locomotive can be shortened to 4-6 hours, which greatly reduces the number of days occupied by locomotive maintenance and effectively reduces the locomotive maintenance rate.

[0030] The device and method of the present invention reduce the impact on mainline transportation. On the one hand, it does not require the transportation department to coordinate and arrange passenger and freight transportation plans to avoid interfering with related routes, and on the other hand, it can eliminate the impact of poor quality status of locomotive trial operation on transportation order.

[0031] The device and method of the present invention improve the quality of locomotive maintenance. By inspecting the traction, braking and other performance of the locomotive in steps and levels, various performance indicators of the locomotive can be fully tested, and relevant quality problems can be checked and handled in a timely manner, effectively ensuring the overall reliability of the locomotive quality.

[0032] The device and method of the present invention saves labor costs. First, there is no need to consume a series of management costs from the section production department, technical department, group company dispatch, locomotive dispatch room, preparation and warehousing, driving organization, etc., as well as the consumption of personnel and maintenance time. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention 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 some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0034] Figure 1 This is a principle topology diagram of the high-power locomotive double closed-loop rolling test system device of the present invention.

[0035] Figure 2 It is the closed-loop flow direction of the electric transmission system when the electric locomotive under test of the present invention is in the traction state.

[0036] Figure 3 It is the closed-loop flow direction of the electric transmission system when the electric locomotive under test is in the braking state.

[0037] Figure 4 This is a principle topology diagram of the network control system being always in a closed loop when the electric locomotive under test is in the traction / braking state. DETAILED DESCRIPTION

[0038] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0039] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0040] like Figure 1-Figure 4 As shown, the present invention provides a double closed-loop rolling test system device, comprising: an electric transmission system and a network control system; the electric transmission system and the accompanying test electric locomotive realize closed-loop transmission, and the locomotive traction / braking condition test is performed through the wheel-rail pair; the network control system and the accompanying test electric locomotive realize MVB communication closed-loop transmission, and the network control system detects the real-time status of the rolling test system device and the accompanying test locomotive through the MVB bus, and controls the rolling test system device and the accompanying test locomotive in real time.

[0041] As a preferred embodiment, in the present application, the electric transmission system is a group control system of multiple motors; the electric transmission system provides an adjustable power supply for the test load motor, controls the parameters of the load motor through a network control system and a four-quadrant converter, so that the tested electric locomotive and the test equipment system reach a stable operating point, thereby realizing the simulation of the locomotive's line traction / braking conditions.

[0042] As a preferred embodiment, in this application, the electric drive system includes: 1 high-voltage protection cabinet, 1 power grid switch cabinet, 1 high-voltage switch cabinet, 3 transformer cabinets, 6 sets of four-quadrant converters, 6 test load motors and mobile contact network. The network control system connects all the equipment of the electric drive system in series with the test locomotive bus to realize the network control system communication closed loop of the rolling test system device. The high-voltage protection cabinet is mainly used for railway single-phase analog quantity acquisition at a voltage level of 27.5kV. It integrates protection, control, measurement, communication, recording and other functions to realize the protection, measurement and control and circuit breaker control functions of the medium and low voltage systems. The test electric locomotive and any equipment in the electric drive system can be interconnected. The power grid switch cabinet includes: a vacuum circuit breaker, a high-voltage voltage transformer, a high-voltage side current transformer, a lightning arrester and a low-voltage side current transformer; the vacuum circuit breaker is used to connect or disconnect the high-voltage 25kV incoming line; the high-voltage voltage transformer converts 25kV into a low voltage of 100V, and sends the converted low voltage to the four-quadrant converter as a synchronization signal of the four-quadrant converter and the electric meter used for the electric meter to detect the voltage of the power grid; the high-voltage side current transformer converts the grid side current of the system when it is working into a small current for primary side overcurrent protection; the low-voltage side current transformer converts the grid side current when it is working into a small current and sends it to the electric meter for the electric meter to detect the current of the power grid.

[0043] Preferably, the four-quadrant converter meets the requirements of long-term stable operation during the test of the locomotive under test, and fully matches the requirements of the traction control unit for the main circuit; the four-quadrant converter includes: a switch cabinet, a single-phase four-quadrant converter, a motor-side converter, a secondary filter cabinet, a control cabinet, a resistor cabinet, a water cooling system and a UPS; the switch cabinet includes a converter main circuit breaker and a charging circuit; the switch cabinet provides input and output switch control and protection for the converter; the single-phase four-quadrant converter includes a main circuit I, a control circuit I and a secondary filter; the single-phase four-quadrant converter controls the DC bus voltage to be stable, and feeds the energy transmitted by the motor-side converter back to the power grid; the motor-side converter includes: a main circuit II and a control circuit II; the motor-side converter The device controls the test motor; the secondary filter cabinet includes: secondary filter inductor and capacitor; 100Hz harmonics on the DC bus are filtered out during the operation of the single-phase four-quadrant converter, and the DC bus voltage is maintained stable through the secondary filter cabinet; the control cabinet contains a traction control unit TCU; the resistor cabinet includes two sets of converter overvoltage absorption resistors. When the DC bus voltage is too high, the overvoltage on the DC bus is released through the chopper circuit and the chopper resistor to protect the converter components; the water cooling system includes: a water cooling tower, a water tank and a pipeline; the water cooling system provides water cooling for the load converter to ensure the safety of the main circuit; the UPS includes: a UPS host and a battery. The UPS provides a stable control power supply for the converter control cabinet.

[0044] The present invention also includes a dual closed-loop rolling test system working method, comprising the following steps:

[0045] Step 1: The traction condition and braking condition test of the electric locomotive under test is realized through the closed-loop electric transmission of the electric transmission system; in the step 1, when the electric locomotive under test is in the braking state, the accompanying motor under test is in the traction state, which is equivalent to the locomotive under test being in the power generation state. The electricity generated by the locomotive is fed back to the mobile contact network through the locomotive pantograph. The accompanying motor under test draws power through the power grid switch cabinet, the high-voltage switch cabinet, the transformer, and the four-quadrant converter in sequence. The accompanying motor under test provides traction for the locomotive, and the energy is consumed by the accompanying motor under test, thereby realizing the closed-loop electric transmission of the transmission system.

[0046] Step 2: Through the communication closed loop of the network control system, the control closed loop of the rolling system test device is realized. In the step 2, when the traction / brake test of the tested locomotive is carried out, the main control console sends the closing instructions of the high-voltage protection cabinet, the power grid switch cabinet, and the high-voltage switch cabinet in sequence through the MVB bus, and then starts the four-quadrant start instruction, and makes the accompanying test motor work in the braking / traction state. Since the network control system communication is in a closed loop state, if there is a problem with any device in operation, the main control console will release the double closed loop of electric transmission and network control after analysis.

[0047] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages and disadvantages of the embodiments. In the above embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments. In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A double closed-loop rolling test system, characterized in that: include: Electric transmission system and network control system; the electric transmission system and the accompanying test electric locomotive realize closed-loop transmission, and the locomotive traction / braking working condition test is performed through wheel-rail; the network control system and the accompanying test electric locomotive realize MVB communication closed-loop transmission, and the network control system detects the real-time status of the rolling test system device and the accompanying test locomotive through the MVB bus, and controls the rolling test system device and the accompanying test locomotive in real time.

2. A double closed-loop rolling test system according to claim 1, characterized in that: The electric transmission system is a group control system of multiple motors; the electric transmission system provides an adjustable power supply for the test load motor, controls the parameters of the load motor through the network control system and the four-quadrant converter, enables the tested electric locomotive and the test equipment system to reach a stable operating point, and realizes the simulation of the line traction / braking conditions of the locomotive.

3. A double closed-loop rolling test system device according to claim 1 or 2, characterized in that: The electric transmission system includes: 1 high-voltage protection cabinet, 1 power grid switch cabinet, 1 high-voltage switch cabinet, 3 transformer cabinets, 6 sets of four-quadrant converters, 6 test load motors and a mobile contact network.

4. A double closed-loop rolling test system according to claim 1, characterized in that: The network control system connects all the devices of the electric transmission system in series with the bus of the accompanying test locomotive to realize the network control system communication closed loop of the rolling test system device.

5. A double closed-loop rolling test system according to claim 1, characterized in that: The accompanying electric locomotive and any equipment in the electric transmission system can be interconnected.

6. A double closed-loop rolling test system according to claim 3, characterized in that: The power grid switch cabinet includes: a vacuum circuit breaker, a high-voltage voltage transformer, a high-voltage side current transformer, a lightning arrester and a low-voltage side current transformer; The vacuum circuit breaker is used to connect or disconnect the high-voltage 25kV incoming line; the high-voltage voltage transformer converts 25kV into a low voltage of 100V, and sends the converted low voltage to the four-quadrant converter as a synchronization signal of the four-quadrant converter and the watt-hour meter used for voltage detection of the power grid; The high-voltage side current transformer converts the grid-side current of the system into a small current when it is working, which is used for primary side overcurrent protection; the low-voltage side current transformer converts the grid-side current of the system when it is working into a small current and sends it to the watt-hour meter for the watt-hour meter to detect the current of the grid.

7. A double closed-loop rolling test system according to claim 2, characterized in that: The four-quadrant converter meets the requirements of long-term stable operation during the test of the locomotive under test, and fully matches the requirements of the traction control unit for the main circuit; the four-quadrant converter includes: a switch cabinet, a single-phase four-quadrant converter, a motor side converter, a secondary filter cabinet, a control cabinet, a resistor cabinet, a water cooling system and a UPS; The switch cabinet includes a main circuit breaker of the converter and a charging circuit; the switch cabinet provides input and output switch control and protection for the converter; The single-phase four-quadrant converter comprises a main circuit I, a control circuit I and a secondary filter; the single-phase four-quadrant converter controls the DC bus voltage to be stable and feeds back the energy transmitted by the motor-side converter to the power grid; The motor-side converter comprises: a main circuit II and a control circuit II; the motor-side converter controls the accompanying test motor; The secondary filter cabinet includes: a secondary filter inductor and a capacitor; filtering out 100 Hz harmonics on the DC bus during the operation of the single-phase four-quadrant converter, and maintaining the stability of the DC bus voltage through the secondary filter cabinet; The control cabinet includes a traction control unit TCU; The resistor cabinet includes two sets of overvoltage absorption resistors for the converter. When the DC bus voltage is too high, the overvoltage on the DC bus is released through the chopper circuit and the chopper resistor to protect the converter components. The water cooling system includes: a water cooling tower, a water tank and a pipeline; the water cooling system provides water cooling and heat dissipation for the load converter to ensure the safety of the main circuit; The UPS comprises: a UPS host and a battery, and the UPS provides a stable control power supply for the converter control cabinet.

8. A method for operating a double closed-loop rolling test system, using the device described in any one of claims 1 to 7, characterized in that: The following steps are involved: Step 1: Implement traction and braking test of the electric locomotive through the closed-loop electric drive of the electric drive system; Step 2: Implement the control closed loop of the rolling system test device through the communication closed loop of the network control system.

9. A double closed-loop rolling test system working method according to claim 8, characterized in that: In the step 1, when the electric locomotive under test is in a braking state, the accompanying motor under test is in a traction state, which is equivalent to the locomotive under test being in a power generation state. The electricity generated by the locomotive is fed back to the mobile contact network through the locomotive pantograph. The accompanying motor under test draws power through the power grid switch cabinet, the high-voltage switch cabinet, the transformer, and the four-quadrant converter in sequence. The accompanying motor under test provides traction for the locomotive, and energy is consumed by the accompanying motor under test, thereby realizing a closed-loop electric transmission of the transmission system.

10. A dual closed-loop rolling test system working method according to claim 8, characterized in that: In the step 2, when the traction / brake test of the locomotive under test is carried out, the main control console sends closing instructions to the high-voltage protection cabinet, the power grid switch cabinet, and the high-voltage switch cabinet in sequence through the MVB bus, and then starts the four-quadrant start instruction, and makes the accompanying test motor work in the braking / traction state. Since the network control system communication is in a closed-loop state, if there is a problem with any device during operation, the main control console will release the double closed loop of electric transmission and network control after analysis.

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