CN112881932A - Intelligent test system and test method for rail transit converter - Google Patents
Intelligent test system and test method for rail transit converter Download PDFInfo
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- CN112881932A CN112881932A CN201911114189.6A CN201911114189A CN112881932A CN 112881932 A CN112881932 A CN 112881932A CN 201911114189 A CN201911114189 A CN 201911114189A CN 112881932 A CN112881932 A CN 112881932A
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- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/005—Testing of electric installations on transport means
- G01R31/008—Testing of electric installations on transport means on air- or spacecraft, railway rolling stock or sea-going vessels
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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Abstract
The invention discloses an intelligent test system and a test method for a rail transit converter, which comprises a system power supply, a direct-current power supply subsystem, an auxiliary power supply subsystem, a load subsystem, an intelligent trigger subsystem and an intelligent measurement and control subsystem; the system power supply provides a direct current power supply required by a test for the converter to be tested through the direct current power supply subsystem, and the system power supply provides auxiliary power for the direct current power supply subsystem, the load subsystem, the intelligent measurement and control subsystem and the intelligent trigger subsystem through the auxiliary power supply subsystem; the intelligent trigger subsystem is used for detecting the tested converter and the load subsystem and sending detection signals to the intelligent measurement and control subsystem; the intelligent measurement and control subsystem is used for controlling the direct-current power supply subsystem to output voltage meeting the test requirement according to the detection signal of the intelligent trigger subsystem. The testing system and the method have the advantages of full automation, high intelligent level and the like.
Description
Technical Field
The invention mainly relates to the technical field of rail transit converter tests, in particular to an intelligent rail transit converter test system and a rail transit converter test method.
Background
The power assessment test of the converter is a crucial item regardless of type test or routine factory test, and the on-load operation condition of the converter is examined. The power examination test of the converter is to connect the output of a power supply system of a test system to the input end of the converter, and simultaneously connect the output end of the converter to a load meeting the requirements of the power examination test. During the power assessment test of the converter, the test system supplies power supply voltages of different grades and loads of different capacities under different working conditions. In the conventional converter power assessment test, a converter is connected into a test system, the converter input voltage value supplied by a power supply system is manually input on a software operation interface of the test system, and then a load with a certain capacity is manually input to perform the converter power assessment test. The operation causes unbalanced utilization rate of the load groups due to different operation habits of different testers, and further causes the phenomenon that equipment with high utilization rate is damaged in advance; meanwhile, the intelligent degree of the test system is low due to the phenomenon of high artificial operation rate.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: aiming at the technical problems in the prior art, the invention provides a full-automatic rail transit converter intelligent test system with high intelligent level and a test method.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
an intelligent test system for a rail transit converter comprises a system power supply, a direct-current power supply subsystem, an auxiliary power supply subsystem, a load subsystem, an intelligent trigger subsystem and an intelligent measurement and control subsystem; the system power supply provides a direct current power supply required by a test for the converter to be tested through the direct current power supply subsystem, and the system power supply provides auxiliary power for the direct current power supply subsystem, the load subsystem, the intelligent measurement and control subsystem and the intelligent trigger subsystem through the auxiliary power supply subsystem; the intelligent trigger subsystem is used for detecting the tested converter and the load subsystem and sending detection signals to the intelligent measurement and control subsystem; the intelligent measurement and control subsystem is used for controlling the direct-current power supply subsystem to output voltage meeting the test requirement according to the detection signal of the intelligent trigger subsystem.
As a further improvement of the above technical solution:
the direct current power supply subsystem comprises an intelligent circuit breaker, a rectification power supply and an output switch which are sequentially connected, wherein the input end of the intelligent circuit breaker is connected with the output end of the system power supply, and the output end of the output switch is connected with the tested converter.
The load subsystem comprises a load change-over switch and a load unit, wherein the load unit comprises one or more of a reactor load, a resistance-inductance load, a resistance load, a motor load or a storage battery load.
The intelligent measurement and control subsystem comprises a measurement and control upper computer, an intelligent slave station, a measurement and control lower computer and a signal conditioning box group; the intelligent slave station respectively performs on-off control and state detection on the intelligent circuit breaker, the output switch and the load transfer switch; the signal conditioning box group comprises an I/O signal conditioning box and an analog quantity conditioning box; the input end of the I/O signal conditioning box is connected with the intelligent triggering subsystem, and the output end of the I/O signal conditioning box is connected with the measurement and control lower computer and used for receiving a detection signal of the intelligent triggering subsystem and sending the detection signal to the measurement and control lower computer; the input end of the analog quantity adjusting box is respectively connected with the load change-over switch and the rectifying power supply, and the output end of the analog quantity adjusting box is connected with the measurement and control lower computer and used for detecting the output voltage and the output current of the load change-over switch and the rectifying power supply and sending the output voltage and the output current to the measurement and control lower computer; the measurement and control upper computer is connected with the measurement and control lower computer.
The intelligent triggering subsystem comprises a tested converter triggering sensor and a load triggering sensor, wherein the tested converter triggering sensor is used for sensing whether the tested converter is at a specified installation position, and the load triggering sensor is used for sensing whether the load unit is at the specified installation position.
The converter trigger sensor to be tested and the load trigger sensor are both PNP type triggers or NPN type triggers.
The invention also discloses a test method based on the intelligent test system for the rail transit converter, which comprises the following steps:
s01, the intelligent trigger subsystem detects the information of the converter to be tested and the state information of the load subsystem and sends the information to the intelligent measurement and control subsystem;
s02, the intelligent measurement and control subsystem generates corresponding test direct current voltage according to the detection signal detected in the step S01;
and S03, the intelligent measurement and control subsystem controls the direct current power supply subsystem to output voltage meeting the test requirement.
As a further improvement of the above technical solution:
in step S01, the information of the current transformer to be tested includes the position, type and power of the current transformer to be tested; the status information of the load subsystem includes a load type and a load capacity.
After the step S03, the method further includes a step S04, where the intelligent measurement and control subsystem reads the voltage and current values of the dc power subsystem and the voltage and current values of the load subsystem in real time; if all the voltage and current values meet the test working condition, analyzing and storing test data in the test process; and if the real-time voltage and current values are incorrect, the intelligent measurement and control subsystem sends a brake opening instruction to the direct-current power supply subsystem.
In step S01, after the information of the converter under test and the state information of the load subsystem are detected, the load groups are automatically put into operation to ensure that the frequency of use of each load group is the same.
Compared with the prior art, the invention has the advantages that:
according to the intelligent test system and the test method for the rail transit converter, the intelligent trigger subsystem is installed on the load terminal, so that automatic identification is performed on different tested converters and different types of capacity loads after the loads are connected, a test power supply meeting test requirements is output, the whole process is completed automatically, and the intelligent level is high; according to the test requirements, automatically detecting the tested object (converter) and the load type, then automatically putting into a proper load group, ensuring that the use frequencies of the load group are equal, and simultaneously putting into a direct-current power supply voltage value meeting the test requirements; the system automatically runs after the switching of the direct-current power supply and the load is finished, the output switch protection test system is automatically disconnected when a voltage value or a load value which does not meet the test requirement appears, and the system automatically runs to the end of the test when the test system normally runs without a fault, and automatically stores and analyzes test data; the whole test process is automatically finished without manual intervention, so that the operation of test personnel is simplified, the automation level of equipment is greatly improved, the reasonable use of a load group is ensured, and the use efficiency of a test system is greatly improved.
Drawings
FIG. 1 is a topological block diagram of an embodiment of the system of the present invention.
Fig. 2 is a block configuration diagram of a system of the present invention in an embodiment.
Fig. 3 is a block diagram of an intelligent measurement and control subsystem according to an embodiment of the present invention.
FIG. 4 is a block diagram of an intelligent trigger subsystem of the present invention in an embodiment.
FIG. 5 is a method flow diagram of a method of the present invention in an embodiment.
Illustration of the drawings: 1. a system power supply; 2. a DC power supply subsystem; 21. an intelligent circuit breaker; 22. a rectified power supply; 23. an output switch; 3. a load subsystem; 31. a load changeover switch; 32. a reactor load; 33. a resistive load; 34. a resistive load; 35. a motor load; 36. a battery load; 4. an intelligent measurement and control subsystem; 41. a measurement and control upper computer; 42. an intelligent slave station; 43. measuring and controlling a lower computer; 44. a signal conditioning box group; 5. an intelligent triggering subsystem; 51. triggering a sensor by the tested converter; 52. a load trigger sensor; 6. an auxiliary power supply subsystem.
Detailed Description
The invention is further described below with reference to the figures and the specific embodiments of the description.
As shown in fig. 1 and fig. 2, the rail transit converter intelligent test system of the present embodiment includes a system power supply 1, a dc power supply subsystem 2, an auxiliary power supply subsystem 6, a load subsystem 3, an intelligent trigger subsystem 5, and an intelligent measurement and control subsystem 4; the system power supply 1 provides a direct current power supply required by a test for the converter to be tested through the direct current power supply subsystem 2, and the system power supply 1 provides auxiliary power for the direct current power supply subsystem 2, the load subsystem 3, the intelligent measurement and control subsystem 4 and the intelligent trigger subsystem 5 through the auxiliary power supply subsystem 6; the intelligent triggering subsystem 5 is used for detecting the tested converter and the load subsystem 3 and sending a detection signal to the intelligent measurement and control subsystem 4; the intelligent measurement and control subsystem 4 is used for controlling the direct current power supply subsystem 2 to output voltage meeting the test requirement according to the detection signal of the intelligent trigger subsystem 5. According to the intelligent test system and the test method for the rail transit converter, the intelligent trigger subsystem 5 is installed on the load terminal, so that automatic identification is performed on different tested converters and different types of capacity loads after the loads are connected, a test power supply meeting test requirements is output, the whole process is completed automatically, and the intelligent level is high. The six subsystems included in the test system can realize independent control and can also carry out communication and data interaction through the Ethernet.
As shown in fig. 2, in the present embodiment, the system power supply 1 supplies power to the main loop of the test system and the auxiliary power supply subsystem 6; the direct current power supply subsystem 2 is used for extracting and rectifying electric energy of the system power supply 1 into a direct current power supply required by a tested article test, and mainly comprises an intelligent circuit breaker 21, a rectifying power supply 22 and an output switch 23 which are sequentially connected, wherein the input end of the intelligent circuit breaker 21 is connected with the output end of the system power supply 1, and the output end of the output switch 23 is connected with a tested current transformer; the auxiliary power supply subsystem 6 realizes auxiliary power supply of the test system, and specifically performs auxiliary power supply on the direct-current power supply subsystem 2, the load subsystem 3, the intelligent measurement and control subsystem 4 and the intelligent trigger subsystem 5.
In this embodiment, the load subsystem 3 includes loads required by various converter examination tests, and mainly includes a load switch 31 and a load unit, where the load unit includes one or more of a reactor load 32, a resistive load 33, a resistive load 34, a motor load 35, and a storage battery load 36.
As shown in fig. 4, in this embodiment, the intelligent trigger subsystem 5 generates and sends the intelligent detection trigger signals of the test system to the tested object (current transformer) and the load subsystem 3, and mainly includes a tested current transformer trigger sensor 51 (i.e., ST) and a load trigger sensor 52 (i.e., SL1, SL2, SL3, SL4, and SL5), where the two types of trigger sensors are PNP type or NPN type. The tested converter trigger sensor 51 (i.e., ST) is responsible for sensing whether the tested object (converter) is at the designated installation position, and the load trigger sensors 52 (i.e., SL1, SL2, SL3, SL4 and SL5) are responsible for sensing whether the specific reactor load 32, the resistive load 33, the resistive load 34, the motor load 35 and the battery load 36 are at the designated installation position.
The working principle of the intelligent triggering subsystem 5 is as follows: after the system is powered on, a tested object converter trigger sensor 51 (namely ST) and a load trigger sensor 52 (namely SL1, SL2, SL3, SL4 and SL5) respectively sense a tested object (converter) and a reactor load 32, a resistance-inductance load 33, a resistance load 34, a motor load 35 and a storage battery load 36, and the specific correspondence sequence is that ST corresponds to CT, SL1 corresponds to L1, SL2 corresponds to L2, SL4 corresponds to L4 and SL5 corresponds to L5. When each trigger sensor senses the object to be measured (i.e. the current transformer and the load), a high-level signal or a low-level signal is sent to the measurement and control subsystem 4. The types of the trigger sensors are PNP type and NPN type, each type of the trigger sensor is normally open and normally closed, taking the normally open type as an example, the PNP type trigger sensor outputs high level when sensing a measured object, and outputs low level signals when not sensing the measured object; the NPN type trigger sensor outputs a low level when sensing a measured object, and outputs a high level signal when not sensing the measured object.
As shown in fig. 3, in this embodiment, the intelligent measurement and control subsystem 4 receives the trigger signal from the intelligent trigger subsystem 5 to realize intelligent control of the test system, and simultaneously reads the real-time voltage and current values of the dc power supply subsystem 2 and the load subsystem 3 during operation to ensure normal and accurate operation of the test system. The intelligent measurement and control subsystem 4 mainly comprises a measurement and control upper computer 41, an intelligent slave station 42, a measurement and control lower computer 43 and a signal conditioning box group 44. The intelligent slave station 42 respectively performs on-off control and state detection on the intelligent circuit breaker 21, the output switch 23 and the load changeover switch 31; the signal conditioning box group 44 comprises an I/O signal conditioning box and an analog quantity conditioning box; the input end of the I/O signal conditioning box is connected with the intelligent triggering subsystem 5, and the output end of the I/O signal conditioning box is connected with the measurement and control lower computer 43 and used for receiving a detection signal of the intelligent triggering subsystem 5 and sending the detection signal to the measurement and control lower computer 43; the input end of the analog quantity adjusting box is respectively connected with the load changeover switch 31 and the rectifying power supply 22, and the output end of the analog quantity adjusting box is connected with the measurement and control lower computer 43 and used for detecting the output voltage and the output current of the load changeover switch 31 and the rectifying power supply 22 and sending the output voltage and the output current to the measurement and control lower computer 43; the measurement and control upper computer 41 is connected with the measurement and control lower computer 43.
Specifically, the measurement and control upper computer 41 adopts a common industrial personal computer, a PC desktop computer, a PC notebook, an HMI, and the like; the intelligent slave station 42 can perform multi-channel self-switching to transmit and receive control signals; the measurement and control lower computer 43 comprises a control lower computer and a test lower computer, wherein the control lower computer is usually processed by PLC (programmable logic controller) through S7-200, S7-300, S7-400, S7-1200, S7-1500 and the like, and the test lower computer is usually received and processed by an NIPCI acquisition card, an NI PXI case, a Linghua PXI case and the like;
the signal conditioning box set 44 includes two parts, I/O signal conditioning box and analog conditioning box, wherein the I/O signal conditioning box usually processes the I/O signal by using a multi-channel I/O signal conditioning box composed of an NI I/O signal acquisition card, a porphyrized I/O signal acquisition card, a thunderbolt I/O signal acquisition card, etc., and the analog conditioning box usually conditions the analog (analog voltage and analog current) by using an analog conditioning box of NI.
The working principle of the measurement and control subsystem 4 is as follows: the upper computer 41 of the measurement and control system compiles a measurement and control program through LabVIEW or C language, the I/O signal conditioning box in the signal conditioning box group 44 receives an automatic trigger signal (I/O signal) sent by the intelligent trigger subsystem 5 and transmits the signal to the lower computer 43 of the measurement and control through Ethernet, the lower computer 43 of the measurement and control logically processes the I/O signal and sends a control instruction, the control instruction conducts direct-current power supply on-off control on the intelligent circuit breaker 21 (namely QF) and the output switch 23(KM) of the direct-current power supply subsystem 2 through a PROFIBUS bus or a PROFINET bus by the intelligent slave station 42 (namely the intelligent slave station 42 or a distributed I/O slave station), conducts on-off control on the load switch cabinet 31 of the load subsystem 3, and receives feedback signals of the intelligent circuit breaker 21 (namely QF) and the load switch cabinet 31(QK) by the lower computer 43 of the measurement and control, to be used as a control reference signal of the measurement and control subsystem 4; in the testing part, analog quantity signals from a rectification power supply 22(UR) in a direct current power supply subsystem 2 and an analog quantity signal from a load change-over switch 31 in a load subsystem 3 are received by an analog quantity conditioning box in a signal conditioning box group 44 and transmitted to a PCI acquisition card or a PXI test lower computer in a measurement and control lower computer 43 through signal cables, the acquired and conditioned voltage and current signals are analyzed and processed in the PXI test lower computer to form a recognizable specific voltage and current value, then the recognizable specific voltage and current value is transmitted to a measurement and control upper computer 41 through a data communication cable to be further processed and displayed, and a control instruction with an intelligent control testing system is formed through logic processing.
In this embodiment, system frame structure adopts the design of automatic triggering intelligence observing and controlling principle, and whole test system major loop hardware comprises energy transfer channel, explains as the order with major loop energy transmission direction and is in proper order: system power supply 1-smart breaker 21(QF) -rectified mains 22(UR) -output switch 23(KM) -test item (converter CT) -load changeover switch 31(QK) -load 3(L1, L2, L3, L4, L5). In addition, the test system mainly adopts PLC and HMI, but also can adopt industrial personal computer or the combination of the industrial personal computer and the PLC.
As shown in fig. 5, the invention also correspondingly discloses a test method based on the above intelligent test system for a rail transit converter, which comprises the following steps:
s01, the intelligent trigger subsystem 5 detects the information of the tested converter and the state information of the load subsystem 3 and sends the information to the intelligent measurement and control subsystem 4;
s02, the measurement and control subsystem generates a corresponding test direct current voltage according to the detection signal detected in the step S01;
and S03, the measurement and control subsystem controls the DC power supply subsystem 2 to output voltage meeting the test requirement.
The intelligent test system of the invention realizes the automatic receiving of the trigger signals of the trigger sensors of the converter and the loads (namely the reactor load 32, the resistance sensing load 33, the resistance load 34, the motor load 35 and the storage battery load 36), the measurement and control system carries out the internal logic processing of software according to the trigger signals, and the direct current power supply and the direct current voltage value suitable for the working condition are automatically switched in according to different types of tested products (converters) and loads.
Specifically, as shown in fig. 5, when the system works, firstly, the auxiliary power supply subsystem 6 is started to perform auxiliary power-on the dc power supply subsystem 2, the load subsystem 3, the intelligent measurement and control subsystem 4 and the intelligent trigger subsystem 5, and after the intelligent measurement and control subsystem 4 is powered on and automatically started, the intelligent test software of the intelligent measurement and control subsystem 4 is initialized;
secondly, the intelligent test system software performs AND operation on the received trigger signals of the tested converter trigger sensor 51 (namely ST) and the load trigger sensor 52 (namely SL1, SL2, SL3, SL4 and SL5), sends a switching-on/switching-off control command to the intelligent circuit breaker 21 (namely QF) according to the AND operation result, performs switching-on operation when the AND result is true, and performs switching-off operation when the AND result is false;
thirdly, after the intelligent circuit breaker 21 (namely QF) is switched on and no fault alarm exists, the intelligent test software performs internal logic processing on the trigger signals of the converter trigger sensor 51 and the load trigger sensor 52 to be tested, sends instructions of different voltage values for the rectification power supply 22 according to different logic processing values of ST and SL (namely ST and SL1, ST and SL2, ST and SL3, ST and SL4, ST and SL5), and simultaneously sends the switch-on of the output switch 23 to enable the direct-current power supply subsystem 2 to output the voltage value meeting the test working condition;
and finally, the intelligent test software reads the voltage and current values of the rectifier power supply 22 and the load switch cabinet 31 in real time, the real-time voltage and current values meet the test working condition, the software normally works in the process, the test data are analyzed and stored, if the real-time voltage and current values are incorrect, the software cannot normally work, the software is sent to an output switch 23 opening instruction, the opening of the output switch 23 and the opening of the intelligent circuit breaker 21 are automatically and sequentially completed after the analysis and storage of the test data are normally completed, meanwhile, the auxiliary power supply subsystem 6 is powered off, and the test is finished. The whole test process is realized automatically and dynamically.
According to the intelligent test system and the test method for the rail transit converter, the intelligent trigger subsystem 5 is installed on the load terminal, so that automatic identification is performed on different tested converters and different types of capacity loads after the loads are connected, a test power supply meeting test requirements is output, the whole process is completed automatically, and the intelligent level is high; according to the test requirements, automatically detecting the tested object (converter) and the load type, then automatically putting into a proper load group, ensuring that the use frequencies of the load group are equal, and simultaneously putting into a direct-current power supply voltage value meeting the test requirements; the system automatically runs after the switching of the direct-current power supply and the load is finished, the output switch 23 is automatically switched off to protect the test system when a voltage value or a load value which does not meet the test requirement appears, the system automatically runs to the end of the test when the test system normally runs without faults, and test data are automatically stored and analyzed; the whole test process is automatically finished without manual intervention, so that the operation of test personnel is simplified, the automation level of equipment is greatly improved, the reasonable use of a load group is ensured, and the use efficiency of a test system is greatly improved.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make numerous possible variations and modifications to the present invention, or modify equivalent embodiments to equivalent variations, without departing from the scope of the invention, using the teachings disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.
Claims (10)
1. An intelligent test system for a rail transit converter is characterized by comprising a system power supply (1), a direct-current power supply subsystem (2), an auxiliary power supply subsystem (6), a load subsystem (3), an intelligent trigger subsystem (5) and an intelligent measurement and control subsystem (4); the system power supply (1) provides a direct current power supply required by a test for the converter to be tested through the direct current power supply subsystem (2), and the system power supply (1) provides auxiliary power for the direct current power supply subsystem (2), the load subsystem (3), the intelligent measurement and control subsystem (4) and the intelligent trigger subsystem (5) through the auxiliary power supply subsystem (6); the intelligent trigger subsystem (5) is used for detecting the tested converter and the load subsystem (3) and sending a detection signal to the intelligent measurement and control subsystem (4); the intelligent measurement and control subsystem (4) is used for controlling the direct current power supply subsystem (2) to output voltage meeting the test requirement according to the detection signal of the intelligent trigger subsystem (5).
2. The intelligent rail transit converter test system as claimed in claim 1, wherein the DC power supply subsystem (2) comprises an intelligent circuit breaker (21), a rectification power supply (22) and an output switch (23) which are connected in sequence, wherein the input end of the intelligent circuit breaker (21) is connected with the output end of the system power supply (1), and the output end of the output switch (23) is connected with the converter to be tested.
3. The rail transit converter intelligent test system according to claim 2, characterized in that the load subsystem (3) comprises a load switch (31) and load units comprising one or more of a reactor load (32) or a resistive-inductive load (33) or a resistive load (34) or a motor load (35) or a battery load (36).
4. The rail transit converter intelligent test system as claimed in claim 3, wherein the intelligent measurement and control subsystem (4) comprises a measurement and control upper computer (41), an intelligent slave station (42), a measurement and control lower computer (43) and a signal conditioning box set (44); the intelligent slave station (42) respectively performs on-off control and state detection on the intelligent circuit breaker (21), the output switch (23) and the load switch (31); the signal conditioning box group (44) comprises an I/O signal conditioning box and an analog quantity conditioning box; the input end of the I/O signal conditioning box is connected with the intelligent triggering subsystem (5), and the output end of the I/O signal conditioning box is connected with the measurement and control lower computer (43) and used for receiving a detection signal of the intelligent triggering subsystem (5) and sending the detection signal to the measurement and control lower computer (43); the input end of the analog quantity adjusting box is respectively connected with the load switch (31) and the rectifying power supply (22), and the output end of the analog quantity adjusting box is connected with the measurement and control lower computer (43) and used for detecting the output voltage and the output current of the load switch (31) and the rectifying power supply (22) and sending the output voltage and the output current to the measurement and control lower computer (43); the measurement and control upper computer (41) is connected with the measurement and control lower computer (43).
5. The rail transit converter intelligent test system according to claim 2, 3 or 4, wherein the intelligent trigger subsystem (5) comprises a converter under test trigger sensor (51) and a load trigger sensor (52), the converter under test trigger sensor (51) is used for sensing whether the converter under test is at a specified installation position, and the load trigger sensor (52) is used for sensing whether a load unit is at a specified installation position.
6. The rail transit converter intelligent test system according to claim 5, wherein the converter trigger sensor (51) to be tested and the load trigger sensor (52) are both PNP type triggers or NPN type triggers.
7. A testing method based on the rail transit converter intelligent testing system of any one of claims 1 to 6 is characterized by comprising the following steps:
s01, the intelligent triggering subsystem (5) detects the information of the tested converter and the state information of the load subsystem (3) and sends the information to the intelligent measurement and control subsystem (4);
s02, the intelligent measurement and control subsystem (4) generates corresponding test direct current voltage according to the detection signal detected in the step S01;
and S03, the intelligent measurement and control subsystem (4) controls the direct current power supply subsystem (2) to output voltage meeting the test requirement.
8. The test method as claimed in claim 7, wherein in the step S01, the information of the current transformer under test includes a position, a type, a power of the current transformer under test; the status information of the load subsystem (3) comprises a load type and a load capacity.
9. The test method according to claim 7 or 8, wherein after the step S03, the method further comprises the step S04, the intelligent measurement and control subsystem (4) reads the voltage and current values of the DC power subsystem (2) and the load subsystem (3) in real time; if all the voltage and current values meet the test working condition, analyzing and storing test data in the test process; if the real-time voltage and current values are incorrect, the intelligent measurement and control subsystem (4) sends a brake-separating instruction to the direct-current power supply subsystem (2).
10. The test method according to claim 7 or 8, characterized in that in step S01, after the information of the converter under test and the status information of the load subsystem (3) are detected, the load groups are automatically put into operation to ensure the same frequency of use of each load group.
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