Intelligent traction protection device test system

Abstract

The invention relates to the technical field of traction protection device testing, and discloses an intelligent traction protection device testing system which comprises a cabinet body, a change-over switch, an intermediate relay, a knob, a button, a miniature circuit breaker, an indicating lamp, a 24V switching power supply module, a 110 / 220V switching power supply module, a measuring module and a man-machine interaction unit which are mutually connected to form a testing circuit. The intelligent traction protection device test system is used for testing various protection functions of a direct current traction protection device, simulates the opening and closing position of a circuit breaker, the position of a handcart and intertripping input and output signals through an intermediate relay, and is externally connected with an indicating lamp, so that an operator can quickly judge a test result according to the color of the indicating lamp; the fault signal can be positioned without checking a display screen and a protection device, so that the effects of quickly checking hardware / software faults of a direct-current traction protection measurement and control device product and improving the production inspection efficiency are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of traction protection device testing, in particular to an intelligent traction protection device testing system. Background Art

[0002] The DC traction cabinet is a key device in the power system, especially in the DC traction power supply system of urban rail transit. It is mainly used to provide stable DC power supply for DC electrical equipment to ensure that these equipment can work normally. In the rapidly developing field of urban rail transit, the stable operation of the DC traction power supply system is crucial to ensure the safe and efficient operation of trains. The stability and reliability of its performance are directly related to the safety and stability of train operation. Through the comprehensive testing and verification of the traction protection device test system, potential faults and hidden dangers in the protection device can be discovered and eliminated in time.

[0003] The existing test plan for DC traction protection and control devices is generally that the inspectors first debug each board, check the reliability of the board operation one by one, and then use simple tools such as millivolt generators to simulate various protection actions on the whole machine. It requires multiple steps to complete, cannot reduce personnel costs, is time-consuming, and has low efficiency, and cannot systematically implement whole-machine testing. Summary of the invention

[0004] In view of the above-mentioned technical deficiencies, the purpose of the present invention is to provide an intelligent traction protection device testing system to solve the problem that the existing DC traction protection measurement and control device testing scheme proposed in the above-mentioned background technology is generally that the inspection personnel first debug each single board, check the reliability of the single board operation one by one, and then use simple tools such as millivolt generators to simulate various protection actions on the whole machine. It requires multiple processes to complete, cannot reduce personnel costs, is time-consuming, inefficient, and cannot systematically implement the whole machine test.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: an intelligent traction protection device test system, comprising a cabinet, a conversion switch, an intermediate relay, a knob, a button, a miniature circuit breaker, an indicator light, a 24V switching power supply module, a 110 / 220V switching power supply module, a measurement module and a human-computer interaction unit. The modules are interconnected and constitute a test circuit for testing various protection functions of a DC traction protection device.

[0006] Preferably, the transfer switch, intermediate relay and miniature circuit breaker are all installed on the inner side of the cabinet, and the knob, button and indicator light are all installed on the surface of the cabinet.

[0007] Preferably, the conversion switch and the intermediate relay are used to control the signal flow direction in the test circuit, and realize the switching of high and low level signals to simulate different fault states.

[0008] Preferably, the knobs and buttons are used to directly control the test process and adjust the voltage state at different times to simplify the operation.

[0009] Preferably, the measurement module includes a circuit for simulating feeder voltage, feeder current, and bus voltage, and can accurately measure the analog quantity of the DC traction protection device, and supports testing of various protection functions such as current change rate protection, current positive protection, current negative protection, low voltage protection, overvoltage protection, thermal protection, impedance protection, failure protection, automatic reclosing test, line test, and pressure difference protection. It also supports external tripping signal testing and single-sided and double-sided tripping function testing through operating buttons.

[0010] Preferably, the miniature circuit breaker is used to simulate the circuit breaker opening and closing positions, the trolley position and the tripping input and output signals, and the test results are directly displayed through an external indicator light, so that the fault signal can be located without checking the display screen.

[0011] Preferably, the 110 / 220V switching power supply module and the 24V switching power supply module can respectively provide power inputs of different voltage levels to meet the requirements of the DC traction protection device for different voltage levels.

[0012] Preferably, the human-computer interaction unit is connected to the test system via a display screen to provide an intuitive operation interface and test result display.

[0013] Preferably, casters are installed at the bottom of the cabinet, and a plurality of casters are provided.

[0014] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0015] First, the present invention provides a stable and reliable power supply for the test system through a 110 / 220V switching power supply module, and directly controls the test process through the set knobs and buttons, adjusts the voltage state at different times, and switches different paths in the test circuit through the conversion switch to achieve flexible configuration of multiple test modes, and realizes the switching of high and low level signals to simulate different fault states, and then simulates the circuit breaker opening and closing positions, trolley positions and joint jump input and output signals through the intermediate relay, and an external indicator light (as shown in HR1~8, HY1, and HG1 in the figure). According to the color of the indicator light, the operator can quickly judge the test result, and can locate the fault signal without checking the display screen and the protection device, so as to achieve the effect of quickly troubleshooting the hardware / software faults of the DC traction protection measurement and control device product and improving the production inspection efficiency.

[0016] Second, the present invention can simulate the feeder voltage, feeder current, and bus voltage through the measurement module (as shown in U8F1 and U14F1 in the figure), and can realize the measurement of the analog quantity of the DC traction protection device, thereby realizing the current change rate protection, current positive protection, current negative protection, low voltage protection, overvoltage protection, thermal protection, impedance protection, failure protection, automatic reclosing test, line test, pressure difference protection and other protection test functions, and can realize the external trip signal test and the single-side and double-side trip function test through the operation button, so that the test means for the DC protection device are richer, more effective, intuitive and powerful.

[0017] Third, the present invention provides a friendly operation interface and rich data display functions for operators through a human-computer interaction unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is an overall stereogram of the present invention;

[0019] Figure 2 This is a control principle diagram of a miniature circuit breaker of the present invention;

[0020] Figure 3 This is a fault simulation principle diagram of the present invention;

[0021] Figure 4 This is a schematic diagram of the measurement module of the present invention.

[0022] Among them: 1. Cabinet body; 11. Casters. DETAILED DESCRIPTION

[0023] The specific implementation modes of the present invention will be further described in detail below with reference to the accompanying drawings. Specific implementation method 1

[0025] The following is a specific implementation of an intelligent traction protection device testing system.

[0026] See also Figure 1-4 An intelligent traction protection device test system includes a cabinet 1, a transfer switch, an intermediate relay, a knob, a button, a miniature circuit breaker, an indicator light, a 24V switching power supply module, a 110 / 220V switching power supply module, a measurement module and a human-computer interaction unit. The modules are interconnected to form a test circuit for testing various protection functions of a DC traction protection device.

[0027] Through the above technical scheme, the 110 / 220V switching power supply module is used to provide a stable and reliable power supply for the test system, and the test process is directly controlled by the set knobs and buttons to adjust the voltage state at different times, and the different paths in the test circuit are switched by the conversion switch to achieve flexible configuration of multiple test modes, and realize the switching of high and low level signals to simulate different fault states, and then simulate the circuit breaker opening and closing positions, trolley positions and joint jump input and output signals through the intermediate relay, and external indicator lights (as shown in the figure HR1~8, HY1, HG1), according to the color of the indicator light, the operator can quickly judge the test results, and locate the fault signal without checking the display screen and the protection device, so as to quickly troubleshoot the hardware / software faults of the DC traction protection measurement and control device products and improve the production inspection efficiency. The miniature circuit breaker also has a protection element, which can quickly cut off the power supply when a short circuit, overload or other abnormal situation occurs in the circuit to protect the test equipment and the device under test from damage. The feeder voltage, feeder current and bus voltage can be simulated through the measurement module (U8F1 and U14F1 in the figure), and the analog quantity of the DC traction protection device can be measured, thereby realizing current change rate protection, current positive protection, current negative protection, low voltage protection, overvoltage protection, thermal protection, impedance protection, failure protection, automatic reclosing test, line test, pressure difference protection and other protection test functions. The external tripping signal test and the single-side and double-side tripping function test can be realized through the operation button, making the test means of the DC protection device more abundant, effective, intuitive and powerful, and providing the operator with a friendly operation interface and rich data display functions through the human-computer interaction unit.

[0028] Specifically, the transfer switch, the intermediate relay and the miniature circuit breaker are all installed on the inner side of the cabinet 1 , and the knobs, buttons and indicator lights are all installed on the surface of the cabinet 1 .

[0029] Through the above technical solution, the conversion switch, intermediate relay and miniature circuit breaker are installed inside the cabinet, and the knob, button and indicator light are installed outside the cabinet 1, so that the entire test system forms a whole.

[0030] Specifically, the conversion switch and the intermediate relay are used to control the signal flow direction in the test circuit and realize the switching of high and low level signals to simulate different fault conditions.

[0031] Through the above technical solution, the test system can simulate a variety of complex fault conditions through the conversion switch, so as to comprehensively verify the response capability and protection performance of the DC traction protection device. Various fault conditions can be simulated through the intermediate relay, and the intermediate relay has isolation, amplification and logic control functions, so it can effectively improve the reliability of the test system.

[0032] Specifically, the knobs and buttons are used to directly control the test process, adjust the voltage state at different times, and simplify the operation.

[0033] Through the above technical solution, the knobs and buttons are convenient for operators to directly touch and control and can accurately adjust the voltage state.

[0034] Specifically, the measurement module includes circuits for simulating feeder voltage, feeder current, and bus voltage, which can accurately measure the analog quantities of DC traction protection devices, and support testing of various protection functions such as current change rate protection, current positive protection, current negative protection, low voltage protection, overvoltage protection, thermal protection, impedance protection, failure protection, automatic reclosing test, line test, and voltage difference protection. It also supports external tripping signal testing and single-sided and double-sided tripping function testing through operating buttons.

[0035] Through the above technical solution, the simulation module can make the testing method of the DC protection device more abundant, effective, intuitive and powerful.

[0036] Specifically, the miniature circuit breaker is used to simulate the circuit breaker opening and closing positions, the trolley position, and the interlocking input and output signals. The test results are directly displayed through external indicator lights, and the fault signal can be located without checking the display screen.

[0037] Through the above technical solution, the miniature circuit breaker can protect the test equipment and the device under test from damage, and can simulate the opening and closing positions, trolley positions and tripping input / output signals of the circuit breaker to provide a real fault scenario for the test.

[0038] Specifically, the 110 / 220V switching power supply module and the 24V switching power supply module can respectively provide power inputs of different voltage levels to meet the requirements of the DC traction protection device for different voltage levels.

[0039] Through the above technical solution, the requirements of different voltage levels can be met, making the test system applicable to a wider range of test scenarios.

[0040] Specifically, the human-computer interaction unit is connected to the test system through a display screen to provide an intuitive operation interface and test result display.

[0041] Through the above technical solutions, the human-computer interaction unit can provide operators with a friendly operation interface and rich data display functions.

[0042] Specifically, casters 11 are installed at the bottom of the cabinet 1, and a plurality of casters 11 are provided.

[0043] Through the above technical solution, the cabinet can be moved by providing a plurality of casters 11, so as to adapt to different scenes.

[0044] When in use, the 110 / 220V switching power supply module provides a stable and reliable power supply for the test system, and the test process is directly controlled by the set knobs and buttons to adjust the voltage state at different times. The different paths in the test circuit are switched by the conversion switch to achieve flexible configuration of multiple test modes and switching of high and low level signals to simulate different fault states. Then, the circuit breaker opening and closing positions, trolley positions, and interlocking input and output signals are simulated through the intermediate relay, and external indicator lights (as shown in HR1~8, HY1, and HG1 in the figure) are connected. According to the color of the indicator light, the operator can quickly judge the test result and locate the fault signal without checking the display screen and the protection device, so as to quickly troubleshoot the hardware / software faults of the DC traction protection measurement and control device and improve the efficiency of production inspection. The result is then obtained through the miniature circuit breaker protection element. When a short circuit, overload or other abnormal situation occurs in the circuit, the power supply is quickly cut off to protect the test equipment and the device under test from damage. The measurement module (U8F1 and U14F1 in the figure) can be used to simulate the feeder voltage, feeder current and bus voltage, and the analog quantity of the DC traction protection device can be measured, thereby realizing current change rate protection, current positive protection, current negative protection, low voltage protection, overvoltage protection, thermal protection, impedance protection, failure protection, automatic reclosing test, line test, pressure difference protection and other protection test functions. The external tripping signal test and the single-side and double-side joint tripping function test can be realized through the operation button, making the test means of the DC protection device more abundant, effective, intuitive and powerful, and providing the operator with a friendly operation interface and rich data display functions through the human-computer interaction unit.

[0045] Although specific embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit thereof, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An intelligent traction protection device test system, characterized in that: The device comprises a cabinet (1), a transfer switch, an intermediate relay, a knob, a button, a miniature circuit breaker, an indicator light, a 24V switching power supply module, a 110 / 220V switching power supply module, a measuring module and a human-machine interaction unit, wherein the modules are interconnected to form a test circuit for testing various protection functions of a DC traction protection device.

2. The intelligent traction protection device test system according to claim 1, characterized in that: The conversion switch, the intermediate relay and the miniature circuit breaker are all installed on the inner side of the cabinet (1), and the knob, the button and the indicator light are all installed on the surface of the cabinet (1).

3. The intelligent traction protection device testing system according to claim 1, characterized in that: The conversion switch and the intermediate relay are used to control the signal flow direction in the test circuit, realize the switching of the high and low level signals, and simulate different fault states.

4. The intelligent traction protection device testing system according to claim 1, characterized in that: The knobs and buttons are used to directly control the test process and adjust the voltage state at different times to simplify the operation.

5. The intelligent traction protection device testing system according to claim 1, characterized in that: The measurement module includes circuits for simulating feeder voltage, feeder current, and bus voltage, and can accurately measure the analog quantity of the DC traction protection device, and supports the testing of various protection functions such as current change rate protection, current positive protection, current negative protection, low voltage protection, overvoltage protection, thermal protection, impedance protection, failure protection, automatic reclosing test, line test, and pressure difference protection. At the same time, it supports external tripping signal testing and single-sided and double-sided joint tripping function testing through operating buttons.

6. The intelligent traction protection device testing system according to claim 1, characterized in that: The miniature circuit breaker is used to simulate the circuit breaker opening and closing positions, the trolley position, and the trip input and output signals. The test results are directly displayed through an external indicator light, and the fault signal can be located without checking the display screen.

7. The intelligent traction protection device testing system according to claim 1, characterized in that: The 110 / 220V switching power supply module and the 24V switching power supply module can respectively provide power inputs of different voltage levels to meet the requirements of the DC traction protection device for different voltage levels.

8. The intelligent traction protection device testing system according to claim 1, characterized in that: The human-computer interaction unit is connected to the test system via a display screen, providing an intuitive operation interface and test result display.

9. The intelligent traction protection device testing system according to claim 1, characterized in that: A caster (11) is installed at the bottom of the cabinet (1), and a plurality of casters (11) are provided.

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