Portable traction substation backflow online evaluation device

Abstract

The utility model provides a portable traction substation backflow online evaluation device, and belongs to the technical field of traction power supply system monitoring. The problems that an SCADA device configured in an existing traction substation is incomplete in monitoring data and poor in use flexibility are solved. Comprising a shell, a power switch, an external interface and a state indicator lamp are arranged on the shell, a display screen, a keyboard, a touch panel and a main control box are fixed in the shell, and a power unit, a data acquisition unit, a data storage unit, a data processing unit and an online evaluation unit are integrated in the main control box. The data acquisition unit is electrically connected with a voltage sensor and a current sensor which are installed at related monitoring points of a traction substation and sends acquired data to the data storage unit, the data storage unit is electrically connected with the data processing unit, and the data processing unit is electrically connected with the online evaluation unit; the utility model is applied to the traction substation.

Description

TECHNICAL FIELD

[0001] The utility model provides a portable traction substation backflow on -line evaluation device belongs to traction power supply system technical field. BACKGROUND

[0002] Traction substation backflow system composition is complex, including the backflow line of power supply profession, inhale the line, ground cable, the comprehensive through ground wire of electric service profession, choke transformer, still including the steel rail of engineering profession, is the combination of power supply, electric service and engineering. The system realizes the collection of current of different backflow paths (including: steel rail, backflow line, ground etc.), guarantees the safe and reliable operation of traction power supply system. In recent years, along with the continuous growth of service time of electrified railway of our country, the corrosion and aging of traction substation backflow system are increasingly serious, frequently cause backflow conductor burnout, backflow proportion imbalance, backflow path anomaly, ground backflow too big etc. Fault, security risk is big, the performance of traction power supply substation backflow system is urgently needed to be evaluated comprehensively. In actual operation process, because there are more hidden engineering in traction substation backflow system, so dynamic detection backflow effective value mode is mostly used to evaluate the performance state of backflow system.

[0003] The existing monitoring device mainly uses the SCADA device configured in traction substation, which can realize the collection, display and record of the effective value of each backflow path, and the record mode mostly uses the trigger intermittent record mode. It faces the following deficiencies: 1) cannot provide more comprehensive information, such as the waveform, phase and harmonic content of each current; 2) mostly fixed installation, poor flexibility. Therefore, it is urgent to develop a portable traction substation backflow on-line evaluation device with high flexibility to realize high-precision collection of traction substation backflow parameters and online evaluation of traction backflow system service behavior. UTILITY MODEL CONTENTS

[0004] The utility model discloses in order to solve the problem that the monitoring data of the SCADA device configured in existing traction substation is not complete and the poor use flexibility, proposes a portable traction substation backflow on-line evaluation device, and the purpose is to realize the comprehensive monitoring and online evaluation of traction substation backflow through the improvement of hardware or the improvement of the combination connection of hardware module and / or circuit.

[0005] The utility model discloses a technical scheme for: a portable traction substation backflow on -line evaluation device, including the casing, be provided with power switch, external interface and state indicating lamp on the casing, the inside fixed of casing has display screen, keyboard, touch -control panel and main control box, the main control box has integrated power unit, data acquisition unit, data storage unit, data processing unit and on -line evaluation unit, the power unit supplies power to whole device, data acquisition unit is connected with the voltage sensor and current sensor of installing in traction substation relevant monitoring point, data acquisition unit sends to data storage unit after voltage sensor, current sensor collection data after AD conversion, data storage unit is connected with data processing unit, data processing unit is connected with on -line evaluation unit, on -line evaluation unit shows the evaluation result on the display screen.

[0006] Further, the microprocessor specifically adopts an FPGA processor chip, and the FPGA processor chip is connected with an industrial control mainboard through a PCIE bus interface chip.

[0007] Further, the main control box adopts an industrial control mainboard based on an Intel processor, the data acquisition module further comprises a microcontroller, the microcontroller is electrically connected with a GPS module, the microcontroller is further connected with the FPGA processor chip through a serial bus, and the microcontroller is further connected with the industrial control mainboard.

[0008] Further, the main control box further integrates a network communication module, and the network communication module comprises a 4G module and a wired network.

[0009] Further, the external interface comprises an antenna interface, a fuse interface, an HDMI bus interface, a USB bus interface, a network interface and an analog acquisition channel interface.

[0010] Further, the data acquisition unit comprises an AD conversion module and a data acquisition module, the AD conversion module is electrically connected with voltage sensors and current sensors of uplink backflow line terminals, downlink backflow line terminals, uplink rail terminals, downlink rail terminals, uplink comprehensive ground wire terminals, downlink comprehensive ground wire terminals and ground net terminals installed on the traction substation through an analog acquisition channel interface, converts collected voltage and current analog signals into digital signals through an AD conversion chip, and the data acquisition module processes the digital signals through a microprocessor.

[0011] Further, the state indicating lamp comprises a 4G signal indicating lamp and a GPS signal indicating lamp.

[0012] Further, a portable handle is arranged on the front face of the casing.

[0013] The utility model discloses relative to prior art has the beneficial effect of:

[0014] 1. The backflow online evaluation device can realize online synchronous monitoring and data storage for multiple different backflow paths in real time, is convenient to carry, can monitor the data of the backflow index of the traction power supply system traction substation under different power supply modes, and can realize the use of multiple traction substations of one device in different time periods.

[0015] 2. The device can evaluate the operation state of the backflow system under different power supply modes, realize abnormal early warning of different backflow path indexes, find out hidden faults of the backflow system, assist on-site operation and maintenance personnel in formulating maintenance plans, and improve the operation and maintenance safety of the traction substation. BRIEF DESCRIPTION OF DRAWINGS

[0016] The utility model will be further described below in combination with the drawings:

[0017] Figure 1 It is the whole structure schematic view of the device of the utility model;

[0018] Figure 2 It is the front structure schematic view of the device of the utility model;

[0019] Figure 3 It is the back structure schematic view of the device of the utility model;

[0020] Figure 4 It is the module connection block diagram of the device of the utility model;

[0021] Figure 5 It is the circuit schematic of the data acquisition processing module part of the utility model;

[0022] Figure 6 It is the application schematic view of the device of the utility model in a traction substation;

[0023] In the drawing: 1 is the shell, 2 is the portable handle, 3 is the display screen, 4 is the keyboard, 5 is the touch panel, 6 is the power switch, 7 is the external interface, 8 is the state indicating lamp. DETAILED DESCRIPTION

[0024] As Figures 1 to 6The utility model provides a portable traction substation backflow on -line evaluation device, including casing 1, the front surface of casing 1 is provided with portable handle 2, the back of casing 1 is provided with power switch 6, external interface 7 and state indicating lamp 8, above -mentioned external interface 7 includes antenna interface, fuse interface, HDMI bus interface, USB bus interface, network interface and analog acquisition channel interface, above -mentioned state indicating lamp 8 includes 4G signal indicating lamp and GPS signal indicating lamp, the inside fixed of casing 1 has display screen 3, keyboard 4, touch panel 5 and main control box, main control box has integrated power unit, data acquisition unit, data storage unit, data processing unit and on -line evaluation unit, and main control box adopts the industrial control mainboard based on Intel processor. Main control box still has integrated GPS module, network communication module, and the real -time application position of on -line evaluation device is recorded through GPS module, and on -line evaluation result is transmitted to cloud database through network communication module, and wherein network communication module includes 4G communication module and wired network two kinds of communication modes, two network communication modes can simultaneously have or single selection one, and wired network adopts network port and communicates, and after 4G network transmission information can be shown through 4G signal indicating lamp.

[0025] Wherein data acquisition unit includes AD conversion module and data acquisition module, AD conversion module is electrically connected with the voltage sensor and current sensor of installation in traction substation uplink backflow line terminal, downlink backflow line terminal, uplink rail terminal, downlink rail terminal, uplink comprehensive ground wire terminal, downlink comprehensive ground wire terminal and ground net terminal through analog acquisition channel interface, and AD conversion chip is converted into digital signal with the voltage, current analog signal of acquisition, data acquisition module is handled to digital signal through microprocessor, and microprocessor specifically adopts FPGA processor chip, and FPGA processor chip is connected with industrial control mainboard through PCIE bus interface chip;Meanwhile data acquisition module still has integrated microcontroller, and microcontroller is connected with GPS module, and the time decoding information of GPS module is sent to FPGA processor chip, and microcontroller is also connected with industrial control mainboard.

[0026] The FPGA processor chip is further connected with a data storage unit, the data storage unit is connected with a data processing unit, and the data processing unit is connected with an online evaluation unit. The voltage sensor and the current sensor deployed at the return flow measurement point of the traction substation measure small voltage / current signals corresponding to the measured electrical quantities;Then, the small voltage / current signals are converted into voltage signals with appropriate amplitudes by an AD conversion module of the data acquisition unit, and then sampled by the data acquisition module;The data collected by the data acquisition unit is transmitted to the data storage unit for storage;The sampled data stored by the data storage unit is transmitted to the data processing unit, the data processing unit denoises the voltage and current signals, and then calculates the traction return flow related indexes, such as the proportion of ground net return flow in total return flow and the proportion of line return flow in total return flow;The calculated related index results are transmitted to the online evaluation unit for result evaluation, the online evaluation unit compares the current distribution proportion and amplitude with the set threshold value (specifically, the traction return flow performance is evaluated by calculating the line return flow proportion and the substation return flow proportion), judges whether the voltage and current are abnormal, thereby obtaining the evaluation result, and publishes the evaluation result for reference of the field operation and maintenance personnel, and guides the operation and maintenance operation.

[0027] The data acquisition unit converts the large voltage / current signals into small signals conforming to the measurement range of the device through the voltage / current sensor. The waveform sampling rate can reach 200kHz, and 40 channels of real-time sampling can be realized at the same time. The AD conversion module converts the voltage and current analog signals of the sensor collected by the data acquisition module into digital signals, realizing simultaneous multi-channel high-speed data acquisition.

[0028] The display screen 3 can display the related online evaluation results of the traction return flow on the screen in real time, and can adjust the sampling parameters, evaluation threshold and other parameters in real time.

[0029] It should be noted that the connection relationship between the various component modules of the utility model is determined and can be realized, and except for the special description in the examples, the specific connection relationship can bring corresponding technical effects, and based on the premise of not relying on the corresponding software program execution, the technical problems proposed by the utility model are solved, the model, the connection mode between the components, modules and specific components in the utility model, and the conventional use method and predictable technical effects brought by the above technical features, except for the specific description, belong to the public content disclosed in the patents, journal papers, technical manuals, technical dictionaries, textbooks obtained by the applicant before the application date, or belong to the existing technology of conventional technology and common sense, and do not need to be described in detail, so that the technical scheme provided in the case is clear, complete and can be realized, and the corresponding entity product can be reproduced or obtained according to the technical means.

[0030] Finally, it should be noted that: the above embodiments are used to illustrate the technical solutions of the present application, but not limited to them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A portable traction substation backflow online evaluation device comprising a housing (1), characterized in that: The shell (1) is provided with a power switch (6), an external interface (7) and a state indicating lamp (8), the inside of the shell (1) is fixed with a display screen (3), a keyboard (4), a touch panel (5) and a main control box, the main control box is integrated with a power supply unit, a data acquisition unit, a data storage unit, a data processing unit and an online evaluation unit, the power supply unit supplies power to the whole device, the data acquisition unit is electrically connected with voltage sensors and current sensors installed at relevant monitoring points of the traction substation, the data acquisition unit sends the data collected by the voltage sensors and the current sensors to the data storage unit after analog-digital conversion, the data storage unit is electrically connected with the data processing unit, the data processing unit is electrically connected with the online evaluation unit, and the online evaluation unit displays the evaluation result on the display screen (3).

2. The portable backfeed on-line evaluation device for traction substation according to claim 1, characterized in that: The external interface (7) comprises an antenna interface, a fuse interface, an HDMI bus interface, a USB bus interface, a network interface and an analog acquisition channel interface.

3. The portable backfeed on-line evaluation device for a traction substation according to claim 2, characterized in that: The data acquisition unit comprises an AD conversion module and a data acquisition module, the AD conversion module is electrically connected with voltage sensors and current sensors installed at traction substation uplink return line terminals, downlink return line terminals, uplink rail terminals, downlink rail terminals, uplink comprehensive ground terminals, downlink comprehensive ground terminals and ground net terminals through the analog acquisition channel interface, converts the collected voltage and current analog signals into digital signals through an AD conversion chip, and the data acquisition module processes the digital signals through a microprocessor.

4. The portable backfeed on-line evaluation device for a traction substation according to claim 3, characterized in that: The microprocessor specifically adopts an FPGA processor chip, and the FPGA processor chip is connected with an industrial control mainboard through a PCIE bus interface chip.

5. The portable backfeed on-line evaluation device for a traction substation according to claim 4, characterized in that: The main control box adopts an industrial control mainboard based on an Intel processor, the data acquisition module further comprises a microcontroller, the microcontroller is electrically connected with a GPS module, the microcontroller is further connected with the FPGA processor chip through a serial bus, and the microcontroller is further connected with the industrial control mainboard.

6. The portable backfeed on-line evaluation device for a traction substation according to claim 5, characterized in that: The main control box is further integrated with a network communication module, and the network communication module comprises a 4G module and a wired network.

7. The portable backfeed online evaluation device for a traction substation of claim 6, wherein: The state indicating lamp (8) comprises a 4G signal indicating lamp and a GPS signal indicating lamp.

8. The portable backfeed on-line evaluation device for traction substation according to claim 1, characterized in that: The front of the shell (1) is provided with a portable handle (2).

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