CN112213633A - Automatic testing device and testing method for service life test of phase change switch - Google Patents
Automatic testing device and testing method for service life test of phase change switch Download PDFInfo
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Abstract
An automatic testing device and a testing method for a commutation switch service life test are provided with a PLC module, an analog quantity extension module, a phase sequence relay assembly, an alternating current contactor assembly, an intermediate relay assembly, a voltage transmitter assembly, a current transmitter and a touch screen monitoring module, and testing is carried out through 8 steps. The invention has the following beneficial effects: 1. the automation and all-weather sustainability of the testing process are realized by utilizing a PLC technology; 2. the communication technology of the touch screen monitoring module and the PLC module is utilized to realize the closed-loop test of the life test, thereby dynamically monitoring the whole test process and ensuring the reliability of the test result and the plasticity of the original data; 3. automatically calculating test data, automatically judging test results and automatically generating test reports; 4. the device has a configured protection function, and ensures the reliability and safety of the automatic test process.
Description
Technical Field
The invention relates to the field of a phase change switch life test, in particular to an automatic testing device and a testing method for the phase change switch life test.
Background
The commutation switch type three-phase load unbalance automatic adjusting device (hereinafter referred to as commutation switch) is a device for automatically adjusting the three-phase load unbalance phenomenon of a power distribution network, and in order to verify the commutation reliability and safety of the commutation switch, a mechanical life test and an electrical life test of the commutation switch are required to be tested. The mechanical life test of the phase change switch is an idle load test, the test generally requires that the phase change switch carries out phase change for 100000 times under an idle load working condition, the electrical life test of the phase change switch is a full load test, and the test generally requires that the phase change switch carries out phase change for 10000 times under a full load working condition, namely a rated load working condition. The phase change switch life test has long test period because the phase change action times are many and the phase change period is not less than 2 s.
In the prior art, whether the test is finished or not is confirmed by reading the action times recorded in the phase change switch. However, this method has the following disadvantages: firstly, the correctness of the test result cannot be compared and verified; secondly, the test process cannot be monitored in real time, and whether the commutation switch completely carries out commutation action according to the specification cannot be confirmed; thirdly, the test data cannot be stored, and the test report cannot be automatically generated; and fourthly, abnormal conditions in the test process cannot be pre-warned and processed in time, potential safety hazards exist in the continuous test process, all-weather uninterrupted test cannot be performed, and the test efficiency is low.
Therefore, it is necessary to provide an automatic testing device and a testing method for a life test of a phase change switch to solve the deficiencies of the prior art.
Disclosure of Invention
One of the purposes of the invention is to provide an automatic testing device for a phase change switch life test, which avoids the defects of the prior art. The automatic testing device for the service life test of the phase change switch can perform all-weather uninterrupted testing, dynamically monitor the whole process and automatically generate a test report.
The above object of the present invention is achieved by the following technical measures:
the utility model provides an experimental automatic testing arrangement of commutation switch life, be provided with the PLC module, analog quantity extension module, phase sequence relay subassembly, the ac contactor subassembly, the auxiliary relay subassembly, the voltage transmitter subassembly, current transmitter and touch-sensitive screen monitoring module, the PLC module and analog quantity extension module, touch-sensitive screen monitoring module, phase sequence relay subassembly and auxiliary relay subassembly are connected, analog quantity extension module is connected with voltage transmitter subassembly and current transmitter, the ac contactor subassembly and voltage transmitter subassembly, the auxiliary relay subassembly is connected with phase sequence relay subassembly.
Preferably, the PLC module is configured to send a commutation command to a commutation switch to be tested, control the switching on and off of the intermediate relay assembly, perform open-phase protection according to the monitoring data, analyze, count and protect the test data, obtain a first test result, and upload the test data and the first test result to the touch screen monitoring module.
Preferably, the analog expansion module is configured to monitor input voltage, output voltage, and load current provided by an external device to obtain monitoring data, and transmit the monitoring data to the PLC module.
Preferably, the touch screen monitoring module is configured to set test parameters, receive test data and a test result of the PLC module, display a phase change switch state and real-time test data, and generate a test report according to the test data.
Preferably, the phase sequence relay assembly is configured to monitor current working phase data of the phase change switch to obtain test data, and transmit the test data to the PLC module through the passive node.
Preferably, the ac contactor assembly is used for controlling the on/off of an input power supply of the commutation switch.
Preferably, the intermediate relay assembly is used for controlling the on-off of the ac contactor assembly and the on-off of the ac contactor of the external power supply supplied by the phase change switch.
Preferably, the voltage transmitter assembly is configured to collect an input voltage and an output voltage of the commutation switch, and transmit the input voltage and the output voltage to the analog expansion module.
Preferably, the current transmitter is configured to collect an output current of the phase change switch, and send the output current to the analog expansion module.
Preferably, the PLC module is provided with a CPU unit.
Preferably, the CPU unit is configured to test data analysis statistics and protection functions, and perform open-phase protection according to the monitoring data.
Preferably, the PLC module is further provided with a digital quantity input unit, a digital quantity output unit, an Ethernet communication unit and a serial port unit, the digital quantity input unit is connected with the phase sequence relay assembly, the digital quantity output unit is connected with the intermediate relay assembly, and the Ethernet communication unit and the serial port unit are respectively connected with the touch screen monitoring module.
Preferably, the digital input unit is configured to receive current operating phase data of the phase-sequence relay assembly.
Preferably, the digital output unit controls the opening and closing of the intermediate relay assembly.
Preferably, the ethernet communication unit is configured to upload the test data and the test result to the touch screen monitoring module.
Preferably, the serial port unit is configured to send a phase change command to the tested phase change switch.
Preferably, the touch screen monitoring module is provided with a test parameter setting unit, a communication setting unit, a commutation switch state monitoring unit, a test data display and storage unit, a test result automatic judgment unit and a test report automatic generation unit, and the test data setting unit, the communication setting unit, the commutation switch state monitoring unit, the test data display and storage unit, the test result automatic judgment unit and the test report automatic generation unit are respectively connected with the PLC module.
Preferably, the test parameter setting unit is configured to set an input test parameter, where the test parameter includes a test type, a phase change frequency, a phase change interval time, and a phase-failure voltage protection fixed value.
Preferably, the communication setting unit is configured to set communication parameters with the PLC module.
Preferably, the commutation switch state monitoring unit is configured to monitor a voltage and an operating phase of an input of the PLC module.
Preferably, the test data display and storage unit is configured to display and store the test data input by the PLC module in real time, where the test data includes predicted test time, remaining test time, completed commutation times, commutation failure times, and remaining commutation times.
Preferably, the automatic test result judging unit judges according to the test data input by the PLC module after the test is finished to obtain a second test result, compares the first test result with the second test result to obtain a final result, and automatically stores the final result.
Preferably, the automatic test report generation unit is configured to generate and store a test report after the test is completed.
Preferably, the phase sequence relay assembly is provided with a phase sequence relay A, a phase sequence relay B and a phase sequence relay C, and the phase sequence relay A, the phase sequence relay B and the phase sequence relay C are respectively connected with the digital quantity input unit.
Preferably, the digital input module is provided with an I0.0 terminal, an I0.1 terminal and an I0.2 terminal, the I0.0 terminal is connected with the phase sequence relay a, the I0.1 terminal is connected with the phase sequence relay B, and the I0.2 terminal is connected with the phase sequence relay C.
When the current work is the phase A, the output contact of the phase A sequence relay is closed, and the I0.0 input node is effective.
When the current work is the phase B, the output contact of the phase B sequence relay is closed, and the I0.1 input node is effective.
When the current work is the C phase, the output contact of the C phase sequence relay is closed, and the I0.2 input node is effective.
Preferably, the digital output module is provided with a Q0.0 terminal and a Q0.1 terminal.
Preferably, the intermediate relay assembly is provided with a first intermediate relay and a second intermediate relay, the first intermediate relay is connected to the Q0.0 terminal, and the second intermediate relay is connected to the Q0.1 terminal.
Preferably, the ac contactor module is provided with a first ac contactor and a second ac contactor, and the first ac contactor and the second ac contactor are connected to the first intermediate relay, respectively.
When the Q0.0 terminal loop is closed, the first intermediate relay is closed, and the first alternating current contactor and the second alternating current contactor are closed simultaneously.
When the Q0.1 terminal is closed, the second intermediate relay is closed.
Preferably, the analog quantity expansion module is provided with a first analog quantity channel and a second analog quantity channel, the first analog quantity channel is connected with the voltage transmitter assembly, and the second analog quantity channel is connected with the current transmitter.
Preferably, the serial port unit is connected with the touch screen monitoring module through a Modbus protocol.
Preferably, the model of the PLC module is Siemens 200SMART SR 20.
Preferably, the analog expansion module is siemens EMAE 08.
Preferably, the current transmitter is of a fully-controlled FKSDJI type.
Preferably, the phase sequence relay A, the phase sequence relay B and the phase sequence relay C are all of the type of Zhengtai XJ 3-G.
Preferably, the first ac contactor and the second ac contactor are both made of schneider LC1D09M 7C.
Preferably, the first intermediate relay and the second intermediate relay are both of a type of schneider RXM2LB2 BD.
Preferably, the voltage transmitter assembly is provided with four voltage transformers, and the four voltage transformers are full-control FK-DJU-400V
Preferably, the voltage transmitter module has an input of 0VAC to 400VAC and an output of 0VDC to 10 VDC.
Preferably, the current transducer has an input of 0AAC to 300AAC and an output of 0VDC to 10 VDC.
The invention also aims to provide a testing method based on the automatic testing device for the service life test of the phase change switch, aiming at avoiding the defects in the prior art. The testing method based on the automatic testing device for the phase change switch life test can automatically realize all-weather uninterrupted testing, dynamic monitoring of the whole process, automatic calculation of testing data, automatic judgment of testing results and automatic generation of testing reports.
The testing method based on the automatic testing device for the phase change switch life test is provided, the automatic testing device for the phase change switch life test is adopted for testing, and the testing method comprises the following steps:
step one, setting test parameters;
step two, judging whether the current phase of the phase change switch is a working phase, if not, returning to the step one, and if so, entering the step three;
step three, recording the action times of the phase sequence relay assembly to obtain test data, displaying the test data and storing the test data;
step four, detecting whether the phase change switch carries out phase change within a time period T, if so, entering step eight, otherwise, entering step five;
step five, counting the total times of actual commutation;
step six, judging whether the total times and the number of times of actual commutation are the same as the test parameters of the step one, if so, entering the step seven, otherwise, entering the step four;
step seven, completing the test to obtain a test report;
and step eight, finishing.
Preferably, the test parameters are test type, commutation times, commutation interval time and open-phase voltage protection fixed value.
Preferably, the number of minutes is the number of times of operation of the phase-a relay, the number of times of operation of the phase-B relay, and the number of times of operation of the phase-C relay.
Preferably, the total number of times is a sum of the number of times of operation of the phase-a relay, the number of times of operation of the phase-B relay, and the number of times of operation of the phase-C relay.
Preferably, T is 1 min.
The invention discloses an automatic testing device and a testing method for a service life test of a commutation switch, which are provided with a PLC module, a phase sequence relay assembly, an alternating current contactor assembly and a touch screen monitoring module, wherein the PLC module is respectively connected with the touch screen monitoring module, the phase sequence relay assembly and the alternating current contactor assembly, and the phase sequence relay assembly is connected with the alternating current contactor assembly and is tested through 8 steps. The invention has the following beneficial effects: 1. the automation and all-weather sustainability of the testing process are realized by utilizing a PLC technology; 2. the communication technology of the touch screen monitoring module and the PLC module is utilized to realize the closed-loop test of the life test, thereby dynamically monitoring the whole test process and ensuring the reliability of the test result and the plasticity of the original data; 3. automatically calculating test data, automatically judging test results and automatically generating test reports; 4. the device has a configured protection function, and ensures the reliability and safety of the automatic test process.
Drawings
The invention is further illustrated by means of the attached drawings, the content of which is not in any way limiting.
Fig. 1 is a schematic diagram of an automatic testing device for a phase change switch life test.
Fig. 2 is a wiring schematic of a PLC module.
Fig. 3 is a wiring diagram of the analog expansion module.
In fig. 1 to 3, there are included:
touch screen monitoring module 100, AC contactor assembly 200, analog expansion module 300, first analog channel 310, second analog channel 320,
A PLC module 400, a digital input unit 410, a digital output unit 420, an Ethernet communication unit 430, a serial unit 440,
Phase sequence A relay 510, phase sequence B relay 520, phase sequence C relay 530,
A voltage transducer assembly 600, a current transducer 700,
A first intermediate relay 810, a second intermediate relay 820.
Detailed Description
The technical solution of the present invention is further illustrated by the following examples.
Example 1.
The utility model provides a commutation switch life test automatic testing arrangement, as shown in fig. 1 to 3, be provided with PLC module 400, analog quantity extension module 300, the phase sequence relay subassembly, ac contactor subassembly 200, the auxiliary relay subassembly, voltage transmitter subassembly 600, current transducer 700 and touch-sensitive screen monitoring module 100, PLC module 400 and analog quantity extension module 300, touch-sensitive screen monitoring module 100, phase sequence relay subassembly and auxiliary relay subassembly are connected, analog quantity extension module 300 is connected with voltage transmitter subassembly 600 and current transducer 700, ac contactor subassembly 200 and voltage transmitter subassembly 600, the auxiliary relay subassembly is connected with the phase sequence relay subassembly.
The PLC module 400 is configured to send a commutation command to a commutation switch to be tested, control the on/off of the intermediate relay assembly, perform open-phase protection according to monitoring data, analyze, count and protect test data, obtain a first test result, and upload the test data and the first test result to the touch screen monitoring module 100.
The analog quantity expanding module 300 monitors input voltage, output voltage, and load current provided from an external device to obtain monitoring data, and transmits the monitoring data to the PLC module 400.
The touch screen monitoring module 100 is configured to set test parameters, receive test data and a test result of the PLC module 400, display a commutation switch state and real-time test data, and generate a test report according to the test data.
And the phase sequence relay assembly is used for monitoring the current working phase data of the phase change switch to obtain test data, and transmitting the test data to the PLC module 400 through the passive node.
And the alternating current contactor assembly 200 is used for controlling the on-off of the input power supply of the phase change switch.
And the intermediate relay assembly is used for controlling the on-off of the alternating current contactor assembly 200 and the on-off of an alternating current contactor of an external power supply supplied by the phase change switch.
And the voltage transmitter assembly 600 is used for collecting the input voltage and the output voltage of the commutation switch and transmitting the input voltage and the output voltage to the analog quantity expansion module 300.
And the current transmitter 700 is used for collecting the output current of the commutation switch and transmitting the output current to the analog quantity expansion module 300.
The PLC module 400 is provided with a CPU unit for testing data analysis statistics and protection functions, and performing open-phase protection according to monitoring data.
The PLC module 400 of the present invention further includes a digital input unit 410, a digital output unit 420, an ethernet communication unit 430, and a serial unit 440, wherein the digital input unit 410 is connected to the phase-sequence relay assembly, the digital output unit 420 is connected to the intermediate relay assembly, and the ethernet communication unit 430 and the serial unit 440 are respectively connected to the touch screen monitoring module 100.
Wherein the digital input unit 410 is used for receiving the current working phase data of the phase sequence relay assembly. And the digital quantity output unit 420 controls the opening and closing of the intermediate relay assembly. The ethernet communication unit 430 is configured to upload the test data and the test result to the touch screen monitoring module 100. The serial port unit 440 is configured to send a phase change command to the tested phase change switch.
The touch screen monitoring module 100 is provided with a test parameter setting unit, a communication setting unit, a commutation switch state monitoring unit, a test data display and storage unit, a test result automatic judgment unit and a test report automatic generation unit, wherein the test data setting unit, the communication setting unit, the commutation switch state monitoring unit, the test data display and storage unit, the test result automatic judgment unit and the test report automatic generation unit are respectively connected with the PLC module 400.
The device comprises a test parameter setting unit, a phase change time setting unit and a phase loss voltage protection setting unit, wherein the test parameter setting unit is used for setting input test parameters, and the test parameters comprise test types, phase change times, phase change interval time and phase loss voltage protection fixed values. And a communication setting unit for setting communication parameters with the PLC module 400. And a commutation switch state monitoring unit for monitoring the voltage and the operating phase of the input of the PLC module 400. And the test data display and storage unit is used for displaying and storing the test data input by the PLC module 400 in real time, wherein the test data comprises predicted test time, residual test time, completed commutation times, commutation failure times and residual commutation times. And the test result automatic judging unit judges according to the test data input by the PLC module after the test is finished to obtain a second test result, compares the first test result with the second test result to obtain a final conclusion, and automatically stores the final conclusion. And the automatic test report generating unit is used for generating and storing the test report after the test is finished.
It should be noted that the automatic test result judging unit of the present invention has two specific ways of judging, namely judging whether the actual commutation times are equal to the set commutation times, that is, the issued commutation command times, and if yes, judging to be qualified; if not, the test result is judged to be unqualified, but the test is continued until the actual phase change times are equal to the set phase change times. Judging whether the phase change switch changes the phase according to the circulation from the phase A to the phase B, from the phase B to the phase C and from the phase C to the phase A in the test process, if so, judging that the phase change switch is qualified; if not, judging that the test result is unqualified.
The phase sequence relay assembly of the present invention is provided with a phase sequence relay a 510, a phase sequence relay B520, and a phase sequence relay C530, and the phase sequence relay a 510, the phase sequence relay B520, and the phase sequence relay C530 are respectively connected to the digital quantity input unit 410. The digital quantity input module is provided with an I0.0 terminal, an I0.1 terminal and an I0.2 terminal, the I0.0 terminal is connected with the phase sequence relay 510A, the I0.1 terminal is connected with the phase sequence relay 520B, and the I0.2 terminal is connected with the phase sequence relay 530C.
When the current operation is phase a, the output contact of phase a sequence relay 510 is closed and the I0.0 input node is active. When the current operation is phase B, the output contact of the phase B sequence relay 520 is closed, and the I0.1 input node is active. When the current operation is the C phase, the output contact of the C phase sequence relay 530 is closed, and the I0.2 input node is active.
The digital quantity output module is provided with a Q0.0 terminal and a Q0.1 terminal. The intermediate relay assembly is provided with a first intermediate relay 810 and a second intermediate relay 820, the first intermediate relay 810 being connected with the Q0.0 terminal, the second intermediate relay 820 being connected with the Q0.1 terminal. The ac contactor assembly 200 is provided with a first ac contactor and a second ac contactor, which are connected with the first intermediate relay 810, respectively.
When the Q0.0 terminal loop is closed, the first intermediate relay 810 is closed, and the first ac contactor and the second ac contactor are closed at the same time. When the Q0.1 terminal is closed, the second intermediate relay 820 is closed.
Specifically, when the Q0.0 terminal loop is closed, the first intermediate relay 810 is closed, so that the first ac contactor and the second ac contactor are closed simultaneously, wherein the normally open contact of the first intermediate relay 810 is connected in series with the first ac contactor and the second ac contactor coil loop; when the Q0.1 terminal loop is closed, the second intermediate relay 820 is closed, the normally closed contact of the second intermediate relay 820 is connected in series in the coil of the phase change switch power supply alternating current contactor, and when the second intermediate relay 820 is closed, the normally closed contact is opened, so that the phase change switch power supply alternating current contactor is disconnected, and the protection effect is achieved.
According to the invention, the first intermediate relay 810 controls the on-off of the first alternating current contactor and the second alternating current contactor, and the normally open contact of the first intermediate relay 810 is connected in series with the first alternating current contactor and the second alternating current contact loop, so that when the first intermediate relay 810 is closed, the normally open contact is changed from off to on, the coils of the first alternating current contactor and the second alternating current contactor are electrified, the normally open contact is connected, when the first intermediate relay 810 is opened, the normally open contact is changed from on to off, the first alternating current contactor and the second alternating current contact coil are deenergized, and the normally open contact is disconnected.
The second intermediate relay 820 controls the on-off of an external power supply alternating current contactor powered by the phase change switch, the normally closed contact of the second intermediate relay 820 is connected in series with a coil of the phase change switch power supply alternating current contactor, and when the second intermediate relay 820 is closed, the normally closed contact is disconnected, so that the phase change switch power supply alternating current contactor is disconnected, and the protection effect is achieved.
The analog quantity expanding module 300 is provided with a first analog quantity channel 310 and a second analog quantity channel 320, wherein the first analog quantity channel 310 is connected with the voltage transmitter assembly 600, and the second analog quantity channel 320 is connected with the current transmitter 700.
The first analog quantity channel 310 comprises AE0, AE1, AE2 and AE3, wherein AE0, AE1, AE2 and AE3 are acquisition channels for inputting A, B, C three-phase voltage and outputting L voltage of a phase change switch respectively and are externally connected with a voltage transmitter. The voltage transmitter is used for collecting the input and output voltages of the commutation switch to the analog quantity expansion module 300.
The second analog quantity channel 320 of the present invention includes AE4, AE4 is a channel for collecting output current (L-phase current) of the commutation switch, and is externally connected to the current transducer 700. The current transducer 700 is used for collecting the output current (L-phase current) of the commutation switch to the analog expansion module 300.
The serial port unit 440 is connected to the touch screen monitoring module 100 through a Modbus protocol.
The automatic testing device for the service life test of the commutation switch can realize the automatic test of the service life test of the commutation switch through simple wiring, can monitor the working state of the tested commutation switch in real time and display test data in real time, such as input voltage/output voltage, working phase difference, load current, test types, commutation times and the like, and has the functions of commutation abnormity protection and input voltage open-phase protection. The real-time storage of the test data and the automatic generation function of the test report ensure the plasticity and reliability of the original test data and reduce the investment of the test labor cost.
The automatic testing device for the phase change switch service life test has the following beneficial effects: 1. the automation and all-weather sustainability of the testing process are realized by utilizing a PLC technology; 2. by utilizing the communication technology of the touch screen monitoring module 100 and the PLC module 400, the closed-loop test of the life test is realized, so that the whole test process is dynamically monitored, and the reliability of the test result and the plasticity of the original data are ensured; 3. automatically calculating test data, automatically judging test results and automatically generating test reports; 4. the device has a configured protection function, and ensures the reliability and safety of the automatic test process.
Example 2.
The automatic testing device for the phase change switch service life test has the following characteristics, the other characteristics are the same as those of the embodiment 1:
the PLC module 400 is model number siemens 200SMART SR 20.
The analog expansion module 300 is model siemens EMAE 08.
The current transducer 700 is model full FKSDJI.
The type of the phase-A relay 510, the type of the phase-B relay 520 and the type of the phase-C relay 530 are all positive Tai XJ 3-G.
The first alternating current contactor and the second alternating current contactor are both of the model of Schneider LC1D09M 7C.
The voltage transmitter assembly 600 is provided with four voltage transformers, and the four voltage transformers are full-automatic FK-DJU-400V in model.
The first intermediate relay 810 and the second intermediate relay 820 are both of the type schneider RXM2LB2 BD.
The input of the voltage transmitter assembly 600 is 0 VAC-400 VAC, and the output is 0 VDC-10 VDC. The current transducer 700 has an input of 0AAC to 300AAC and an output of 0VDC to 10 VDC.
The components of the embodiment are all of common types, so that the automatic testing device for the service life test of the commutation switch has the advantage of low production cost.
Example 3.
A test method based on an automatic testing device for a commutation switch life test adopts the automatic testing device for the commutation switch life test of embodiment 1 to test, and comprises the following steps:
step one, setting test parameters;
step two, judging whether the current phase of the phase change switch is a working phase, if not, returning to the step one, and if so, entering the step three;
step three, recording the action times of the phase sequence relay assembly to obtain test data, displaying the test data and storing the test data;
step four, detecting whether the phase change switch carries out phase change within a time period T, if so, entering step eight, otherwise, entering step five;
step five, counting the total times of actual commutation;
step six, judging whether the total times and the number of times of actual commutation are the same as the test parameters of the step one, if so, entering the step seven, otherwise, entering the step four;
step seven, completing the test to obtain a test report;
and step eight, finishing.
The test parameters comprise test types, commutation times, commutation interval time and open-phase voltage protection fixed values; t is 1 min. The number of times is the number of times of operation of the phase-a relay 510, the number of times of operation of the phase-B relay 520, and the number of times of operation of the phase-C relay 530. The total number of times is the sum of the number of times of operation of the phase-a relay 510, the number of times of operation of the phase-B relay 520, and the number of times of operation of the phase-C relay 530.
The testing method based on the automatic testing device for the phase change switch life test adopts the automatic testing device for the phase change switch life test to carry out testing, and the testing is carried out through 8 steps. The invention has the following beneficial effects: 1. the automation and all-weather sustainability of the testing process are realized by utilizing a PLC technology; 2. by utilizing the communication technology of the touch screen monitoring module 100 and the PLC module 400, the closed-loop test of the life test is realized, so that the whole test process is dynamically monitored, and the reliability of the test result and the plasticity of the original data are ensured; 3. automatically calculating test data, automatically judging test results and automatically generating test reports; 4. the device has a configured protection function, and ensures the reliability and safety of the automatic test process.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. The utility model provides a commutation switch life test automatic testing arrangement which characterized in that: the system is provided with a PLC module, an analog quantity expansion module, a phase sequence relay assembly, an alternating current contactor assembly, an intermediate relay assembly, a voltage transmitter assembly, a current transmitter and a touch screen monitoring module, wherein the PLC module is connected with the analog quantity expansion module, the touch screen monitoring module, the phase sequence relay assembly and the intermediate relay assembly;
the PLC module is used for sending a commutation command to a tested commutation switch, controlling the on and off of the intermediate relay assembly, performing open-phase protection according to monitoring data, analyzing, counting and protecting the testing data, obtaining a first testing result and uploading the testing data and the first testing result to the touch screen monitoring module;
the analog quantity expansion module is used for monitoring input voltage, output voltage and load current provided by external equipment to obtain monitoring data and transmitting the monitoring data to the PLC module;
the touch screen monitoring module is used for setting test parameters, receiving test data and test results of the PLC module, displaying the phase change switch state and real-time test data, and generating a test report according to the test data;
the phase sequence relay assembly is used for monitoring the current working phase data of the phase change switch to obtain test data and transmitting the test data to the PLC module through the passive node;
the alternating current contactor assembly is used for controlling the on-off of an input power supply of the phase change switch;
the intermediate relay assembly is used for controlling the on-off of the alternating current contactor assembly and the on-off of an alternating current contactor of an external power supply supplied by the phase change switch;
the voltage transmitter assembly is used for acquiring the input voltage and the output voltage of the commutation switch and transmitting the input voltage and the output voltage to the analog quantity expansion module;
and the current transmitter is used for collecting the output current of the phase change switch and transmitting the output current to the analog quantity expansion module.
2. The automatic testing device for the life test of the commutation switch according to claim 1, wherein: the PLC module is provided with a CPU unit;
and the CPU is used for testing data analysis statistics and protection functions and performing open-phase protection according to the monitoring data.
3. The automatic testing device for the life test of the commutation switch according to claim 2, wherein: the PLC module is also provided with a digital quantity input unit, a digital quantity output unit, an Ethernet communication unit and a serial port unit, the digital quantity input unit is connected with the phase sequence relay assembly, the digital quantity output unit is connected with the intermediate relay assembly, and the Ethernet communication unit and the serial port unit are respectively connected with the touch screen monitoring module;
the digital quantity input unit is used for receiving the current working phase data of the phase sequence relay assembly;
the digital quantity output unit controls the on and off of the intermediate relay assembly;
the Ethernet communication unit is used for uploading the test data and the test result to the touch screen monitoring module;
and the serial port unit is used for sending a phase change command to the tested phase change switch.
4. The automatic testing device for the life test of the commutation switch according to claim 3, wherein: the touch screen monitoring module is provided with a test parameter setting unit, a communication setting unit, a commutation switch state monitoring unit, a test data display and storage unit, a test result automatic judgment unit and a test report automatic generation unit, wherein the test data setting unit, the communication setting unit, the commutation switch state monitoring unit, the test data display and storage unit, the test result automatic judgment unit and the test report automatic generation unit are respectively connected with the PLC module;
the test parameter setting unit is used for setting input test parameters, and the test parameters comprise a test type, commutation times, commutation interval time and a phase-failure voltage protection fixed value;
the communication setting unit is used for setting communication parameters with the PLC module;
the phase change switch state monitoring unit is used for monitoring the input voltage and the working phase of the PLC module;
the test data display and storage unit is used for displaying and storing the test data input by the PLC module in real time, and the test data comprises predicted test time, residual test time, completed commutation times, commutation failure times and residual commutation times;
the test result automatic judging unit judges according to the test data input by the PLC module after the test is finished to obtain a second test result, compares the first test result with the second test result to obtain a final conclusion, and automatically stores the final conclusion;
and the automatic test report generating unit is used for generating and storing the test report after the test is finished.
5. The automatic testing device for the life test of the commutation switch according to claim 4, wherein: the phase sequence relay assembly is provided with a phase sequence relay A, a phase sequence relay B and a phase sequence relay C, and the phase sequence relay A, the phase sequence relay B and the phase sequence relay C are respectively connected with the digital quantity input unit;
the digital quantity input module is provided with an I0.0 terminal, an I0.1 terminal and an I0.2 terminal, the I0.0 terminal is connected with the phase sequence relay A, the I0.1 terminal is connected with the phase sequence relay B, and the I0.2 terminal is connected with the phase sequence relay C;
when the current work is the phase A, an output contact of the phase A sequence relay is closed, and the I0.0 input node is effective;
when the current work is the phase B, an output contact of the phase B sequence relay is closed, and the I0.1 input node is effective;
when the current work is the C phase, the output contact of the C phase sequence relay is closed, and the I0.2 input node is effective.
6. The automatic testing device for the life test of the commutation switch according to claim 5, wherein: the digital quantity output module is provided with a Q0.0 terminal and a Q0.1 terminal,
the intermediate relay assembly is provided with a first intermediate relay and a second intermediate relay, the first intermediate relay is connected with a Q0.0 terminal, and the second intermediate relay is connected with a Q0.1 terminal;
the alternating current contactor assembly is provided with a first alternating current contactor and a second alternating current contactor, and the first alternating current contactor and the second alternating current contactor are respectively connected with a first intermediate relay;
when the Q0.0 terminal loop is closed, the first intermediate relay is closed, and the first alternating current contactor and the second alternating current contactor are closed simultaneously;
when the Q0.1 terminal is closed, the second intermediate relay is closed.
7. The automatic testing device for the life test of the commutation switch according to claim 6, wherein: the analog quantity expansion module is provided with a first analog quantity channel and a second analog quantity channel, the first analog quantity channel is connected with the voltage transducer assembly, and the second analog quantity channel is connected with the current transducer.
8. The automatic testing device for the life test of the commutation switch according to claim 7, wherein: the serial port unit is connected with the touch screen monitoring module through a Modbus protocol;
the model of the PLC module is Siemens 200SMART SR 20;
the model of the analog quantity expansion module is Siemens EMAE 08;
the type of the current transmitter is rich control FKSDJI;
the type of the phase sequence relay A, the type of the phase sequence relay B and the type of the phase sequence relay C are all positive Tai XJ 3-G;
the first alternating current contactor and the second alternating current contactor are both of the type Schneider LC1D09M 7C;
the models of the first intermediate relay and the second intermediate relay are both Schneider RXM2LB2 BD;
the voltage transmitter assembly is provided with four voltage transformers, and the types of the four voltage transformers are respectively rich control FK-DJU-400V;
the input of the voltage transmitter assembly is 0 VAC-400 VAC, and the output is 0 VDC-10 VDC;
the input of the current transmitter is 0 AAC-300 AAC, and the output is 0 VDC-10 VDC.
9. A testing method based on an automatic testing device for a life test of a commutation switch, which is characterized in that the automatic testing device for the life test of the commutation switch according to any one of claims 1 to 8 is used for testing, and the method comprises the following steps:
step one, setting test parameters;
step two, judging whether the current phase of the phase change switch is a working phase, if not, returning to the step one, and if so, entering the step three;
step three, recording the action times of the phase sequence relay assembly to obtain test data, displaying the test data and storing the test data;
step four, detecting whether the phase change switch carries out phase change within a time period T, if so, entering step eight, otherwise, entering step five;
step five, counting the total times of actual commutation;
step six, judging whether the total times and the number of times of actual commutation are the same as the test parameters of the step one, if so, entering the step seven, otherwise, entering the step four;
step seven, completing the test to obtain a test report;
and step eight, finishing.
10. The testing method based on the automatic testing device for the life test of the commutation switch as recited in claim 9, wherein: the test parameters are test type, commutation times, commutation interval time and open-phase voltage protection fixed value;
the sub-times are the action times of the phase sequence relay A, the action times of the phase sequence relay B and the action times of the phase sequence relay C;
the total times are the sum of the action times of the phase sequence relay A, the action times of the phase sequence relay B and the action times of the phase sequence relay C;
and the T is 1 min.
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