Metro vehicle braking heat production data monitoring and collecting system

Abstract

The utility model relates to a metro vehicle braking heat production data monitoring and collecting system. In the running process of metro vehicles on urban rail lines, under different line conditions, energy generated in the braking process of the metro vehicles is different, and at present, a system for monitoring and collecting braking heat generation data of the metro vehicles is lacked. The device comprises an overhead line system, an overhead line system bus voltage monitoring device and a brake resistor control switch, the brake resistor control switch is electrically connected with the current transformer, the current transformer is electrically connected with the current analog-digital conversion device, and the current analog-digital conversion device is electrically connected with the current oscilloscope; the overhead line system bus voltage monitoring device is electrically connected with the voltage transformer, the voltage transformer is electrically connected with the voltage analog-digital conversion device, and the voltage analog-digital conversion device is electrically connected with the voltage oscilloscope. The metro vehicle energy consumption monitoring system can perform real-time monitoring and data acquisition on metro vehicle energy consumption.

Description

Technical Field

[0001] The utility model relates to the technical field of data monitoring, in particular to a subway vehicle braking heat generation data monitoring and acquisition system. Background Art

[0002] Currently, most subway vehicles in my country are powered by direct current (DC) from the catenary / rail system. They draw energy from the grid during traction and feed it back to the grid through regenerative braking during braking. When the grid voltage rises to 1800V, they employ resistance braking. Given the rapid start and brake cycles of subway vehicles, and their precise, pre-set speeds throughout the line, these vehicles consume significant amounts of electrical energy during start-up, which in turn generates considerable braking energy during braking.

[0003] When subway vehicles travel on urban rail lines, the amount of energy generated during braking varies under different line conditions (such as different curve radii, different slopes, entering and exiting stations, and entering and exiting section lines). Currently, part of the energy generated during braking of subway vehicles is returned through the contact network for secondary utilization, and part is consumed through heat generation through indoor resistors within the vehicle base. Since subway lines are relatively fixed, the energy consumption characteristics of vehicles passing through the same position on the line have certain similarities. By analyzing the complementary characteristics of vehicle feedback energy and optimizing the hybrid energy storage capacity through energy consumption analysis, we can provide energy storage strategies for energy collection and reuse, and also provide data support for subsequent intelligent operation and maintenance.

[0004] Analysis of subway vehicle energy consumption, energy feedback, and energy consumption characteristics requires real-time monitoring and statistics of braking energy to determine the relationship between braking heat energy and time when subway vehicles enter and exit sections and lines. However, there is currently a lack of systems for monitoring and collecting subway vehicle braking heat generation data, making it impossible to monitor and collect subway vehicle braking heat generation data in real time. Summary of the Invention

[0005] The purpose of the utility model is to provide a subway vehicle brake heat generation data monitoring and collection system, so as to at least solve the current problem that it is impossible to monitor and collect subway vehicle brake heat generation data in real time.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the present utility model is:

[0007] A system for monitoring and collecting brake heat generation data for subway vehicles, comprising a catenary capable of directly transmitting electrical energy to the subway vehicles, a catenary bus voltage monitoring device capable of detecting voltage, and a brake resistor control switch capable of controlling the direction of current flow, wherein the catenary, the catenary bus voltage monitoring device, and the brake resistor control switch are electrically connected;

[0008] The braking resistor control switch is electrically connected to a current transformer capable of converting a large input current into a small current, the current transformer is electrically connected to a current analog-to-digital converter capable of converting the input current into a digital signal, and the current analog-to-digital converter is electrically connected to a current oscilloscope capable of monitoring instantaneous current;

[0009] The overhead line bus voltage monitoring device is electrically connected to a voltage transformer capable of converting an input high voltage into a low voltage, the voltage transformer is electrically connected to a voltage analog-to-digital conversion device capable of converting an input voltage into a digital signal, and the voltage analog-to-digital conversion device is electrically connected to a voltage oscilloscope capable of monitoring instantaneous voltage;

[0010] The current analog-to-digital conversion device and the voltage analog-to-digital conversion device are both electrically connected to an industrial control machine that is connected to a train dispatching system and can generate subway vehicle information.

[0011] Furthermore, the current transformer is electrically connected to a braking resistor capable of consuming energy.

[0012] Furthermore, the current analog-to-digital conversion device and the voltage analog-to-digital conversion device both communicate with the industrial computer via the RS-485 communication protocol.

[0013] Furthermore, the industrial computer communicates with the gateway router via the RS-485 communication protocol, and the gateway router is connected to and communicates with the power dispatching system.

[0014] Furthermore, the industrial computer is electrically connected to the storage device.

[0015] Furthermore, the storage device is connected to a display.

[0016] Furthermore, the contact network bus voltage monitoring device is an RCS-9628C microcomputer voltage transformer.

[0017] Furthermore, the braking resistor control switch is WBCPS (SKBO)-E.

[0018] Furthermore, the electrical connection is through a wire connection.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] This utility model realizes the real-time monitoring and data collection of subway vehicle energy consumption by building a heat generation data and instantaneous current and voltage monitoring and collection system during the braking process of subway vehicles. After the subway vehicle generates braking energy, it is converted into a small secondary current through a current transformer, and then the converted current is converted into a current digital signal through a current analog-to-digital conversion device, and then connected to a current oscilloscope to monitor the instantaneous current during the braking process. The high voltage flowing into the contact network bus voltage monitoring device is converted into a low voltage through a voltage transformer, and then the converted voltage is converted into a voltage digital signal through a voltage analog-to-digital conversion device, and then connected to a voltage oscilloscope to monitor the instantaneous voltage during the braking process. This setting realizes the real-time monitoring of the instantaneous current and voltage, and at the same time, the driving scheduling information and the converted voltage are monitored by the industrial computer. The current and voltage values are matched to form energy, time and physical location information, thereby realizing the collection of energy consumption data of subway vehicles. In addition, the system can intelligently operate and maintain subway vehicles based on the energy, time and physical location information by transmitting the energy, time and physical location information into the power dispatching system. The energy, time and physical location information flowing into the industrial computer is stored in the storage device for easy analysis and retrieval in the later stage. The energy, time and physical location information in the storage device is displayed on the display for easy viewing of data information. The utility model provides valuable basic data for the later energy consumption analysis, digitalization and intelligent operation and maintenance of urban rail transit. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, without paying any creative work, they can also obtain drawings of other embodiments based on these drawings.

[0022] Figure 1 This is a principle block diagram of the utility model;

[0023] The symbols in the figure are:

[0024] 1-catenary, 2-catenary bus voltage monitoring device, 3-brake resistor control switch, 4-current transformer, 5-brake resistor, 6-current analog-to-digital conversion device, 7-current oscilloscope, 8-voltage transformer, 9-voltage analog-to-digital conversion device, 10-voltage oscilloscope, 11-travel dispatching system, 12-industrial computer, 13-RS-485 communication protocol, 14-gateway router, 15-power dispatching system, 16-storage device, 17-display. DETAILED DESCRIPTION

[0025] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be provided below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the disclosure of the present invention.

[0026] Definitions of various terms involved in this utility model:

[0027] (1) Braking: refers to the artificial stopping of the operation of subway vehicles, including slowing down, stopping, preventing movement or accelerating the operation of subway vehicles.

[0028] (2) Primary side: refers to the side of the transformer connected to the input.

[0029] (3) Secondary side: refers to the side of the transformer connected to the output.

[0030] like Figure 1 As shown, the utility model provides a subway vehicle braking heat generation data monitoring and collection system, including a contact network 1 capable of directly transmitting electric energy to the subway vehicle, a contact network bus voltage monitoring device 2 capable of detecting voltage, and a braking resistor control switch 3 capable of controlling the direction of current flow. The contact network 1 is electrically connected to the contact network bus voltage monitoring device 2 and the braking resistor control switch 3 respectively, and the contact network bus voltage monitoring device 2 is electrically connected to the braking resistor control switch 3. When the contact network bus voltage monitoring device 2 detects that the voltage is greater than 900V, the braking resistor control switch 3 can be automatically opened by the utility model so that the energy can be subsequently monitored and collected. If the voltage of the braking energy is less than 900V, the contact network bus voltage monitoring device 2 will not open the braking resistor control switch 3. Through the provision of the contact network bus voltage monitoring device 2, the startup of the entire system can be made more targeted. For some energy generated by the subway vehicle with less monitoring and collection value, it is not necessary to monitor and collect it, thereby avoiding the situation where the energy consumed in one system startup is greater than the braking energy generated by the subway vehicle, and the system is more controllable.

[0031] The braking resistor control switch 3 is electrically connected to a current transformer 4 that can convert a large input current into a small current. The current transformer 4 uses the principle of electromagnetic induction to convert a large primary-side current into a small secondary-side current. The current transformer 4 is electrically connected to a braking resistor 5 that can consume energy and a current analog-to-digital converter 6 that can convert the input current into a digital signal. The current analog-to-digital converter 6 is electrically connected to a current oscilloscope 7 that can monitor the instantaneous current. The braking resistor 5 can generate heat to consume the input energy. The current analog-to-digital converter 6 can convert the current analog signal into a current digital signal. The current oscilloscope 7 is connected to the converted current digital signal to monitor the instantaneous current during the braking process.

[0032] The contact network bus voltage monitoring device 2 is electrically connected to a voltage transformer 8 that can convert an input high voltage into a low voltage. The voltage transformer 8 can convert the high voltage of the contact network 1 flowing into the contact network bus voltage monitoring device 2, and convert the high voltage into a low voltage. The voltage transformer 8 is electrically connected to a voltage analog-to-digital conversion device 9 that can convert the input voltage into a digital signal. The voltage analog-to-digital conversion device 9 is electrically connected to a voltage oscilloscope 10 that can monitor the instantaneous voltage. The voltage analog-to-digital conversion device 9 can convert a voltage analog signal into a voltage digital signal. The voltage oscilloscope 10 is connected to the converted voltage digital signal and can monitor the instantaneous voltage during the braking process.

[0033] The current analog-to-digital converter 6 and the voltage analog-to-digital converter 9 both communicate with an industrial computer 12 connected to a train dispatching system 11 and capable of generating subway vehicle information via the RS-485 communication protocol (Recommended Standard-485 communication protocol) 13. The industrial computer 12 collects the current and voltage values converted by the current analog-to-digital converter 6 and the voltage analog-to-digital converter 9, and simultaneously connects to the train dispatching system 11 that records the corresponding line position and time of subway vehicle travel. The industrial computer 12 can match the physical position of the subway vehicle, the corresponding time, and the current and voltage values to generate energy, time, and physical position information, thereby collecting subway vehicle energy consumption data.

[0034] The industrial computer 12 communicates with the gateway router 14 via the RS-485 communication protocol 13, and the gateway router 14 is connected to and communicates with the power dispatching system 15. The generated energy, time and physical location information is communicated with the gateway router 14 via the RS-485 communication protocol 13, and the energy, time and physical location information is transmitted to the power dispatching system 15 via the gateway router 14. The power dispatching system 15 can perform intelligent operation and maintenance of subway vehicles based on the energy, time and physical location information.

[0035] Furthermore, the industrial computer 12 is also electrically connected to the storage device 16 , which can store the energy, time and physical location information flowing into the industrial computer 12 for later analysis and retrieval.

[0036] The storage device 16 is connected to a display 17 , and the display 17 can display the energy, time and physical location information in the storage device 16 through an interface.

[0037] In the present invention, the electrical connection is achieved through wire connection.

[0038] The working principle of this utility model is as follows:

[0039] When the contact network bus voltage monitoring device 2 detects that the voltage flowing into the contact network 1 is greater than 900V, it automatically opens the braking resistor control switch 3. The current is converted into a small secondary current through the current transformer 4. The converted current flows into the braking resistor 5, and the braking resistor 5 generates heat to consume this energy. The current analog-to-digital conversion device 6 converts the current converted by the current transformer 4 into a current digital signal. The converted current digital signal is connected to the current oscilloscope 7, and the instantaneous current during the braking process is monitored by the current oscilloscope 7. The voltage transformer 8 converts the high voltage flowing from the contact network 1 into a low voltage. The voltage analog-to-digital conversion device 9 converts the converted voltage The converted voltage digital signal is connected to the voltage oscilloscope 10, and the instantaneous voltage during the braking process is monitored by the voltage oscilloscope 10. The industrial computer 12 matches the driving dispatching information in the driving dispatching system 11 and the current and voltage values converted by the current analog-to-digital conversion device 6 and the voltage analog-to-digital conversion device 9 to form energy, time and physical location information. The energy, time and physical location information is transmitted to the power dispatching system 15 through the gateway router 14. The storage device 16 stores the energy, time and physical location information flowing into the industrial computer 12, and the display 17 displays the energy, time and physical location information in the storage device 16 on the interface.

[0040] The above examples are used to illustrate the present invention, which are only used to help understand the present invention and are not intended to limit the present invention. Those skilled in the art of the present invention can make some simple deductions, modifications or substitutions based on the concept of the present invention.

Claims

1. A subway vehicle brake heat generation data monitoring and collection system, characterized by: The invention comprises a contact network (1) capable of directly transmitting electric energy to a subway vehicle, a contact network bus voltage monitoring device (2) capable of detecting voltage, and a braking resistor control switch (3) capable of controlling the direction of current flow, wherein the contact network (1), the contact network bus voltage monitoring device (2), and the braking resistor control switch (3) are electrically connected, and the contact network bus voltage monitoring device (2) can automatically open the braking resistor control switch (3) when detecting that the voltage is greater than 900V; The braking resistor control switch (3) is electrically connected to a current transformer (4) capable of converting an input large current into a small current, the current transformer (4) is electrically connected to a current analog-to-digital conversion device (6) capable of converting an input current into a digital signal, the current analog-to-digital conversion device (6) is electrically connected to a current oscilloscope (7) capable of monitoring instantaneous current, and the instantaneous current during the braking process is monitored via the current oscilloscope (7); The contact network bus voltage monitoring device (2) is electrically connected to a voltage transformer (8) capable of converting an input high voltage into a low voltage, the voltage transformer (8) is electrically connected to a voltage analog-to-digital conversion device (9) capable of converting an input voltage into a digital signal, the voltage analog-to-digital conversion device (9) is electrically connected to a voltage oscilloscope (10) capable of monitoring instantaneous voltage, and the instantaneous voltage during the braking process is monitored via the voltage oscilloscope (10); The current analog-to-digital conversion device (6) and the voltage analog-to-digital conversion device (9) are both electrically connected to an industrial control computer (12) that is connected to a train dispatching system (11) and is capable of generating subway vehicle information.

2. The subway vehicle brake heat generation data monitoring and acquisition system according to claim 1, characterized in that: The current transformer (4) is electrically connected to a braking resistor (5) capable of consuming energy.

3. The subway vehicle brake heat generation data monitoring and acquisition system according to claim 1, characterized in that: The current analog-to-digital conversion device (6) and the voltage analog-to-digital conversion device (9) both communicate with the industrial control computer (12) via the RS-485 communication protocol (13).

4. The subway vehicle brake heat generation data monitoring and acquisition system according to claim 3, characterized in that: The industrial control computer (12) communicates with the gateway router (14) via the RS-485 communication protocol (13), and the gateway router (14) is connected to and communicates with the power dispatching system (15).

5. The subway vehicle brake heat generation data monitoring and acquisition system according to claim 1 is characterized by: The industrial computer (12) is electrically connected to the storage device (16).

6. The subway vehicle brake heat generation data monitoring and acquisition system according to claim 5, characterized in that: The storage device (16) is connected to the display (17).

7. The subway vehicle brake heat generation data monitoring and acquisition system according to claim 1, characterized in that: The contact network bus voltage monitoring device (2) is an RCS-9628C microcomputer voltage transformer.

8. The subway vehicle brake heat generation data monitoring and acquisition system according to claim 1, characterized in that: The braking resistor control switch (3) is WBCPS (SKBO)-E.

9. The subway vehicle braking heat generation data monitoring and acquisition system according to any one of claims 1 to 5, characterized in that: The electrical connection is through a wire connection.

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