CN112213633B - Automatic testing device and method for life test of phase change switch - Google Patents
Automatic testing device and method for life test of phase change switch Download PDFInfo
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Abstract
An automatic testing device for a life test of a phase change switch and a testing method thereof are 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, and are tested through 8 steps. The beneficial effects of the invention are as follows: 1. the automation and all-weather sustainability of the testing process are realized by utilizing the PLC technology; 2. the closed loop test of the life test is realized by utilizing the communication technology of the touch screen monitoring module and the PLC module, so that the whole test process is dynamically monitored, and the reliability of the test result and the original data can be guaranteed; 3. automatically calculating test data, automatically judging test results and automatically generating a test report; 4. the method has the configured protection function, and ensures the reliability and safety of an automatic test process.
Description
Technical Field
The invention relates to the field of life test of a phase change switch, in particular to an automatic test device and a test method for the life test of the phase change switch.
Background
The automatic phase-change switch type three-phase load unbalance adjusting device (hereinafter referred to as a phase-change switch) is a device for automatically adjusting the three-phase load unbalance phenomenon of a power distribution network, and in order to verify the reliability and the safety of the phase change of the phase-change switch, a mechanical life test and an electrical life test of the phase-change switch type three-phase load unbalance adjusting device are required to be tested. The mechanical life test of the phase change switch is an idle test, the test generally requires the phase change switch to change phase 100000 times under the idle working condition, the electrical life test of the phase change switch is a full load test, and the test generally requires the phase change switch to change phase 10000 times under the full load working condition, namely the rated load working condition. The life test of the phase change switch has longer test period because the phase change action times are more and the phase change period is not less than 2 s.
In the prior art, whether the test is finished is confirmed by reading the action times recorded in the phase change switch. However, this method has the following disadvantages: 1. the correctness of the test result cannot be compared and verified; 2. the test process cannot be monitored in real time, and whether the commutation switch performs the commutation action completely according to the specification cannot be confirmed; 3. the test data cannot be stored, and the test report cannot be automatically generated; 4. abnormal conditions in the test process cannot be early warned and processed in time, potential safety hazards exist in the continuous test process, all-weather uninterrupted test cannot be conducted, and the test efficiency is low.
Therefore, in order to solve the deficiencies of the prior art, it is necessary to provide an automatic testing device and a testing method for life test of a phase change switch.
Disclosure of Invention
One of the purposes of the present invention is to provide an automatic testing device for life test of a phase change switch, which avoids the defects of the prior art. The automatic testing device for the life test of the phase change switch can be used for all-weather uninterrupted testing, whole-process dynamic monitoring and automatic generation of a test report.
The above object of the present invention is achieved by the following technical measures:
the utility model provides a phase change switch life test automatic testing arrangement is provided with PLC module, analog quantity expansion module, phase sequence relay assembly, alternating current contactor subassembly, intermediate relay assembly, voltage transmitter subassembly, current transmitter and touch-sensitive screen monitoring module, and the PLC module is connected with analog quantity expansion module, touch-sensitive screen monitoring module, phase sequence relay assembly and intermediate relay assembly, and analog quantity expansion module is connected with voltage transmitter subassembly and current transmitter, and alternating current contactor subassembly is connected with voltage transmitter subassembly, intermediate relay assembly and phase sequence relay assembly.
Preferably, the PLC module is configured to send a commutation command to the to-be-tested commutation switch, control on and off of the intermediate relay assembly, perform phase-failure protection according to the monitoring data, analyze, count and protect the testing data, obtain a first testing result, and upload the testing data and the first testing result to the touch screen monitoring module.
Preferably, the analog quantity expansion module is configured to monitor the input voltage, the output voltage, and the load current provided by the external device to obtain monitoring data, and send the monitoring data to the PLC module.
Preferably, the touch screen monitoring module is used for performing test parameter setting, receiving test data and test results of the PLC module, displaying a phase change switch state and real-time test data, and generating a test report according to the test data.
Preferably, the phase sequence relay assembly is used for monitoring current working phase data of the phase change switch to obtain test data, and transmitting the test data to the PLC module through a passive node.
Preferably, the ac contactor assembly is used for controlling on-off of the input power supply of the phase change switch.
Preferably, the intermediate relay assembly is used for controlling the on-off of the alternating current contactor assembly and the on-off of an external power supply alternating current contactor powered by the phase change switch.
Preferably, the voltage transmitter assembly is configured to collect an input voltage and an output voltage of the phase change switch, and transmit the input voltage and the output voltage to the analog quantity expansion module.
Preferably, the current transducer is configured to collect an output current of the phase change switch and send the output current to the analog quantity expansion module.
Preferably, the PLC module is provided with a CPU unit.
Preferably, the CPU unit is configured to perform analysis, statistics, and protection of test data, and perform phase loss protection according to the monitored 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 on/off of the intermediate relay assembly.
Preferably, the ethernet communication unit is configured to upload test data and test results to the touch screen monitoring module.
Preferably, the serial port unit is configured to send a commutation command to the to-be-tested commutation switch.
Preferably, the touch screen monitoring module is provided with a test parameter setting unit, a communication setting unit, a phase change switch state monitoring unit, a test data display and storage unit, a test result automatic judging unit and a test report automatic generating unit, and the test data setting unit, the communication setting unit, the phase change switch state monitoring unit, the test data display and storage unit, the test result automatic judging unit and the test report automatic generating unit are respectively connected with the PLC module.
Preferably, the test parameter setting unit is configured to set input test parameters, where the test parameters include a test type, a commutation number, a phase separation time, and a default phase voltage protection fixed value.
Preferably, the communication setting unit is configured to set a communication parameter with the PLC module.
Preferably, the phase change switch state monitoring unit is configured to monitor an input voltage and an operating phase of the PLC module.
Preferably, the test data display and storage unit is configured to display and store, in real time, test data input by the PLC module, where the test data includes an expected test time, a remaining test time, a number of times of completed commutation, a number of times of commutation failure, and a number of remaining commutation.
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 conclusion, and automatically stores the final conclusion.
Preferably, the automatic test report generating unit is configured to generate and store a test report after the test is completed.
Preferably, the above-mentioned phase sequence relay assembly is provided with an a-phase sequence relay, a B-phase sequence relay and a C-phase sequence relay, and the a-phase sequence relay, the B-phase sequence relay and the C-phase sequence relay are respectively connected with the digital input unit.
Preferably, the digital quantity input module is provided with an I0.0 terminal, an I0.1 terminal and an I0.2 terminal, wherein the I0.0 terminal is connected with the a phase sequence relay, the I0.1 terminal is connected with the B phase sequence relay, and the I0.2 terminal is connected with the C phase sequence relay.
When currently operating as phase a, the output contacts of the phase-a relay are closed and the I0.0 input node is active.
When the current operation is B phase, the output contact of the B phase sequence relay is closed, and the I0.1 input node is effective.
When the current operation is C phase, the output contact of the C phase sequence relay is closed, and the I0.2 input node is effective.
Preferably, the digital quantity input unit is provided with a Q0.0 terminal and a Q0.1 terminal.
Preferably, the intermediate relay assembly is provided with a first intermediate relay connected to the Q0.0 terminal and a second intermediate relay connected to the Q0.1 terminal.
Preferably, the ac contactor assembly 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 ac contactor and the second ac contactor are simultaneously closed.
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 SR20.
Preferably, the model of the analog quantity expansion module is siemens EMAE08.
Preferably, the current transmitter is of a type of full-scale fksdi.
Preferably, the types of the A phase sequence relay, the B phase sequence relay and the C phase sequence relay are Zhengtai XJ3-G.
Preferably, the first ac contactor and the second ac contactor are both schrader LC1D09M7C.
Preferably, the first intermediate relay and the second intermediate relay are both of the schneider RXM2LB2BD type.
Preferably, the voltage transmitter assembly is provided with four voltage transformers, and the types of the four voltage transformers are full-scale FK-DJU-400V
Preferably, the voltage transmitter assembly has an input of 0VAC to 400VAC and an output of 0VDC to 10VDC.
Preferably, the current transducer has an input of 0AAC to 300AAC and an output of 0VDC to 10VDC.
Another object of the present invention is to provide a testing method based on a life test automatic testing device for a phase change switch, which avoids the disadvantages of the prior art. The testing method based on the phase change switch life test automatic testing device can automatically perform all-weather uninterrupted testing, dynamically monitor the whole process, automatically calculate test data, automatically judge test results and automatically generate test reports.
The test method based on the automatic test device for the life test of the phase change switch is provided, and the automatic test device for the life test of the phase change switch is adopted for testing, 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 or not, 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 a phase change switch performs phase change in a T time period, if so, entering a step eight, and if not, entering a step five;
step five, counting the total number of actual commutation;
step six, judging whether the actual total commutation times and the sub-times are the same as the test parameters of the step one, if so, entering a step seven, and if not, entering a step four;
step seven, completing the test to obtain a test report;
and step eight, ending.
Preferably, the test parameters are test type, commutation times, phase separation time and open-phase voltage protection fixed values.
Preferably, the number of times of the division is the number of times of the action of the A phase sequence relay, the number of times of the action of the B phase sequence relay and the number of times of the action of the C phase sequence relay.
Preferably, the total number of times is the sum of the number of times of the operation of the a-phase sequence relay, the number of times of the operation of the B-phase sequence relay, and the number of times of the operation of the C-phase sequence relay.
Preferably, T is 1min.
The invention relates to an automatic testing device for a life test of a phase change switch and a testing method thereof, wherein the automatic testing device is provided with a PLC module, a phase sequence relay assembly, an alternating current contactor assembly and a touch screen monitoring module, 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 tested through 8 steps. The beneficial effects of the invention are as follows: 1. the automation and all-weather sustainability of the testing process are realized by utilizing the PLC technology; 2. the closed loop test of the life test is realized by utilizing the communication technology of the touch screen monitoring module and the PLC module, so that the whole test process is dynamically monitored, and the reliability of the test result and the original data can be guaranteed; 3. automatically calculating test data, automatically judging test results and automatically generating a test report; 4. the method has the configured protection function, and ensures the reliability and safety of an automatic test process.
Drawings
The invention is further illustrated by the accompanying drawings, which are not to be construed as limiting the invention in any way.
Fig. 1 is a schematic diagram of an automatic testing device for life test of a phase change switch.
Fig. 2 is a schematic diagram of the wiring of the PLC module.
Fig. 3 is a schematic diagram of the wiring of the analog expansion module.
In fig. 1 to 3, there are included:
touch screen monitor module 100, ac contactor assembly 200, analog quantity expansion module 300, first analog quantity channel 310, second analog quantity channel 320,
PLC module 400, digital input unit 410, digital output unit 420, ethernet communication unit 430, serial port unit 440,
A phase sequence relay 510, B phase sequence relay 520, C phase sequence relay 530,
Voltage transmitter assembly 600, current transmitter 700,
A first intermediate relay 810, a second intermediate relay 820.
Detailed Description
The technical scheme of the invention is further described with reference to the following examples.
Example 1.
As shown in fig. 1 to 3, the automatic testing device for the life test of the phase change switch is provided with a PLC module 400, an analog quantity expansion module 300, a phase sequence relay assembly, an ac contactor assembly 200, an intermediate relay assembly, a voltage transmitter assembly 600, a current transmitter 700 and a touch screen monitoring module 100, wherein the PLC module 400 is connected with the analog quantity expansion module 300, the touch screen monitoring module 100, the phase sequence relay assembly and the intermediate relay assembly, the analog quantity expansion module 300 is connected with the voltage transmitter assembly 600 and the current transmitter 700, and the ac contactor assembly 200 is connected with the voltage transmitter assembly 600, the intermediate relay assembly and the phase sequence relay assembly.
The PLC module 400 is configured to send a commutation command to the to-be-tested commutation switch, control the on/off of the intermediate relay assembly, perform phase-loss protection according to the monitoring data, analyze, count and protect the testing data, obtain a first testing result, and upload the testing data and the first testing result to the touch screen monitoring module 100.
The analog quantity expansion module 300 monitors the input voltage, the output voltage, and the load current supplied from the 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 perform test parameter setting, receive test data and test results 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.
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 a passive node.
The ac contactor assembly 200 is used for controlling the on-off of the input power of the phase change switch.
The intermediate relay assembly is used for controlling the on-off of the alternating current contactor assembly 200 and the on-off of an external power supply alternating current contactor powered by the phase change switch.
The voltage transmitter assembly 600 is configured to collect the input voltage and the output voltage of the phase change switch and transmit the input voltage and the output voltage to the analog quantity expansion module 300.
The current transducer 700 is used for collecting the output current of the phase change switch and sending 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 phase loss protection according to the monitoring data.
The PLC module 400 of the present invention is further provided with a digital quantity input unit 410, a digital quantity output unit 420, an ethernet communication unit 430 and a serial port unit 440, the digital quantity input unit 410 is connected with the phase sequence relay assembly, the digital quantity output unit 420 is connected with the intermediate relay assembly, and the ethernet communication unit 430 and the serial port unit 440 are respectively connected with the touch screen monitoring module 100.
Wherein the digital input unit 410 is configured to receive current operating phase data of the phase sequence relay assembly. And a digital quantity output unit 420 for controlling the on and off 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 used for sending a commutation command to the phase change switch under test.
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 judging unit and a test report automatic generating 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 judging unit and the test report automatic generating unit are respectively connected with the PLC module 400.
The test parameter setting unit is used for setting input test parameters, wherein the test parameters comprise test types, commutation times, phase separation time and open-phase voltage protection fixed values. And a communication setting unit for setting communication parameters with the PLC module 400. And a phase change switch state monitoring unit for monitoring the voltage and the operation 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, the number of times of completed commutation, the number of times of commutation failure and the number of times of residual commutation. And the automatic test result judging unit is used for judging according to the test data input by the PLC module after the test is finished to obtain a second test result, comparing the first test result with the second test result to obtain a final conclusion, and automatically storing 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 judging unit for test result of the present invention has two specific modes, namely, firstly, judging whether the actual commutation frequency is equal to the set commutation frequency, namely, the issued commutation command frequency, if yes, judging to be qualified; if not, judging that the test result is unqualified, and continuing the test until the actual commutation times are equal to the set commutation times. Judging whether the phase change switch changes phase according to the cycle of the phase A to the phase B, the phase B to the phase C and the phase C to the phase A in the test process, and 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 an a-phase sequence relay 510, a B-phase sequence relay 520, and a C-phase sequence relay 530, and the a-phase sequence relay 510, the B-phase sequence relay 520, and the C-phase sequence relay 530 are connected with the digital input unit 410, respectively. The digital quantity input module is provided with an I0.0 terminal, an I0.1 terminal and an I0.2 terminal, wherein the I0.0 terminal is connected with the A phase sequence relay 510, the I0.1 terminal is connected with the B phase sequence relay 520, and the I0.2 terminal is connected with the C phase sequence relay 530.
When currently operating as phase a, the output contact of the a-phase sequence relay 510 is closed and the I0.0 input node is active. When currently operating as phase B, the output contact of phase B relay 520 is closed and the I0.1 input node is active. When currently operating as phase C, the output contact of phase C relay 530 is closed and the I0.2 input node is active.
The digital quantity input unit of the present invention 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 to the Q0.0 terminal, and the second intermediate relay 820 being connected to the Q0.1 terminal. The ac contactor assembly 200 is provided with a first ac contactor and a second ac contactor, which are connected to 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 simultaneously closed. 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 at the same time, 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 the coil of the alternating current contactor powered by the phase change switch, and when the second intermediate relay 820 is closed, the normally closed contact of the second intermediate relay 820 is opened, so that the alternating current contactor powered by the phase change switch is opened, and the protection function is realized.
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 circuit, so that when the first intermediate relay 810 is closed, the normally open contact of the first intermediate relay 810 is changed from open to closed, the coils of the first alternating current contactor and the second alternating current contactor are electrified, the normally open contact of the first intermediate relay 810 is switched on, when the first intermediate relay 810 is opened, the normally open contact of the first intermediate relay is changed from closed to open, the first alternating current contactor and the second alternating current contact coil are deenergized, and the normally open contact of the first intermediate relay 810 is disconnected.
The second intermediate relay 820 controls the on-off of the external power supply alternating current contactor powered by the phase change switch, and the normally closed contact of the second intermediate relay 820 is connected in series with the coil of the alternating current contactor powered by the phase change switch, when the second intermediate relay 820 is closed, the normally closed contact of the second intermediate relay 820 is opened, so that the alternating current contactor powered by the phase change switch is opened, and the protection function is realized.
Analog quantity extension block 300 is provided with a first analog quantity channel 310 and a second analog quantity channel 320, first analog quantity channel 310 being connected to voltage transmitter assembly 600 and second analog quantity channel 320 being connected to current transmitter 700.
The first analog quantity channel 310 of the present invention includes AE0, AE1, AE2 and AE3, where AE0, AE1, AE2 and AE3 are input A, B, C three-phase voltage and output L voltage acquisition channels of the phase change switch, respectively, and are externally connected to a voltage transmitter. The voltage transmitter is used for collecting input and output voltages of the phase change switch to the analog quantity expansion module 300.
The second analog channel 320 of the present invention includes AE4, where AE4 is a collection channel of output current (L-phase current) of the phase change switch, and is externally connected to the current transducer 700. The current transducer 700 functions to collect the commutation switch output current (L-phase current) to the analog expansion module 300.
The serial port unit 440 is connected to the touch screen monitor module 100 through the Modbus protocol.
The automatic testing device for the life test of the phase change switch can realize the automatic test of the life test of the phase change switch through simple wiring, can monitor the working state of the phase change switch to be tested in real time and display test data in real time, such as input voltage/output voltage, working phase, load current, test type, phase change times and the like, has the functions of phase change abnormal protection and input voltage open-phase protection, and can automatically disconnect the input power supply of the phase change switch if phase change errors, phase change failures and input voltage open-phase faults occur in the automatic testing process, thereby ensuring the safety of the automatic testing process, enabling the life test of the phase change switch to realize all-weather uninterrupted test, greatly shortening the testing period and improving the testing efficiency. The functions of real-time storage of test data and automatic generation of test reports ensure the plasticity and reliability of test original data and reduce the investment of test labor cost.
The automatic testing device for the life test of the phase change switch has the following beneficial effects: 1. the automation and all-weather sustainability of the testing process are realized by utilizing the PLC technology; 2. the closed loop test of the life test is realized by utilizing the communication technology of the touch screen monitoring module 100 and the PLC module 400, so that the whole test process is dynamically monitored, and the reliability of test results and the original data consistency are ensured; 3. automatically calculating test data, automatically judging test results and automatically generating a test report; 4. the method has the configured protection function, and ensures the reliability and safety of an automatic test process.
Example 2.
The automatic testing device for life test of phase change switch has the other characteristics similar to those of the embodiment 1, and also has the following characteristics:
the model of PLC module 400 is siemens 200smart SR20.
The model of the analog quantity expansion module 300 is siemens EMAE08.
The model of current transducer 700 is FKSDJI.
The A phase sequence relay 510, B phase sequence relay 520, and C phase sequence relay 530 are all of the type Zhengtai XJ3-G.
The first alternating current contactor and the second alternating current contactor are respectively of the Schneider LC1D09M7C type.
The voltage transmitter assembly 600 is provided with four voltage transformers, all of which are of the type well-controlled FK-DJU-400V.
The first intermediate relay 810 and the second intermediate relay 820 are both of the schrad RXM2LB2BD type.
The voltage transmitter assembly 600 has an input of 0VAC to 400VAC and an output of 0VDC to 10VDC. The current transducer 700 has an input of 0AAC to 300AAC and an output of 0VDC to 10VDC.
The components of the embodiment are all of common types, so the automatic testing device for the life test of the phase change switch has the advantage of low production cost.
Example 3.
The test method based on the automatic test device for life test of the phase change switch adopts the automatic test device for life test of the phase change switch in the embodiment 1 for 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 or not, 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 a phase change switch performs phase change in a T time period, if so, entering a step eight, and if not, entering a step five;
step five, counting the total number of actual commutation;
step six, judging whether the actual total commutation times and the sub-times are the same as the test parameters of the step one, if so, entering a step seven, and if not, entering a step four;
step seven, completing the test to obtain a test report;
and step eight, ending.
The test parameters are test types, commutation times, phase-separated time and open-phase voltage protection fixed values; t is 1min. The sub-numbers are the number of actions of the a-phase sequence relay 510, the number of actions of the B-phase sequence relay 520, and the number of actions of the C-phase sequence relay 530. The total number of times is the sum of the number of actions of the a-phase sequence relay 510, the number of actions of the B-phase sequence relay 520, and the number of actions of the C-phase sequence relay 530.
According to the testing method based on the automatic testing device for the life test of the phase change switch, the automatic testing device for the life test of the phase change switch is adopted for testing, and the testing is carried out through 8 steps. The beneficial effects of the invention are as follows: 1. the automation and all-weather sustainability of the testing process are realized by utilizing the PLC technology; 2. the closed loop test of the life test is realized by utilizing the communication technology of the touch screen monitoring module 100 and the PLC module 400, so that the whole test process is dynamically monitored, and the reliability of test results and the original data consistency are ensured; 3. automatically calculating test data, automatically judging test results and automatically generating a test report; 4. the method has the configured protection function, and ensures the reliability and safety of an automatic test process.
Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present invention may be modified or substituted equally without departing from the spirit and scope of the technical solution of the present invention.
Claims (10)
1. The utility model provides a phase change switch life test automatic testing arrangement which characterized in that: the device 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 the to-be-tested commutation switch, controlling the on-off of the intermediate relay assembly, performing phase-failure protection according to the 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 current working phase data of the phase change switch to obtain test data, and transmitting the test data to the PLC module through a 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 external power supply alternating-current contactor powered by the phase change switch;
the voltage transmitter assembly is used for collecting the input voltage and the output voltage of the phase change switch and transmitting the input voltage and the output voltage to the analog quantity expansion module;
the current transducer is used for collecting the output current of the phase change switch and sending the output current to the analog quantity expansion module.
2. The automatic test equipment for life test of a phase change switch according to claim 1, wherein: the PLC module is provided with a CPU unit;
the CPU unit is used for testing data analysis, statistics and protection functions and carrying out open-phase protection according to the monitoring data.
3. The automatic test equipment for life test of a phase change 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, wherein 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 current working phase data of the phase sequence relay assembly;
the digital quantity output unit is used for controlling the on/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;
the serial port unit is used for sending a commutation command to the tested commutation switch.
4. The automatic test equipment for life test of a phase change switch according to claim 3, wherein: the touch screen monitoring module is provided with a test parameter setting unit, a communication setting unit, a phase change switch state monitoring unit, a test data display and storage unit, a test result automatic judging unit and a test report automatic generating unit, wherein the test data setting unit, the communication setting unit, the phase change switch state monitoring unit, the test data display and storage unit, the test result automatic judging unit and the test report automatic generating unit are respectively connected with the PLC module;
the test parameter setting unit is used for setting input test parameters, wherein the test parameters comprise test types, commutation times, phase-failure voltage protection fixed values and phase-failure time;
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 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, wherein the test data comprises predicted test time, residual test time, the number of times of completing commutation, the number of times of failure in commutation and the number of times of remaining commutation;
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 conclusion, and automatically stores the final conclusion;
and the automatic test report generating unit is used for generating and storing a test report after the test is finished.
5. The automatic test equipment for life test of a phase change switch according to claim 4, wherein: the phase sequence relay assembly is provided with an A phase sequence relay, a B phase sequence relay and a C phase sequence relay, and the A phase sequence relay, the B phase sequence relay and the C phase sequence relay are respectively connected with the digital quantity input unit;
the digital quantity input unit is provided with an I0.0 terminal, an I0.1 terminal and an I0.2 terminal, wherein the I0.0 terminal is connected with the A phase sequence relay, the I0.1 terminal is connected with the B phase sequence relay, and the I0.2 terminal is connected with the C phase sequence relay;
when the current working phase is A phase, the output contact of the A phase sequence relay is closed, and the I0.0 input node is effective;
when the current working phase is B phase, the output contact of the B phase sequence relay is closed, and the I0.1 input node is effective;
when the current operation is C phase, the output contact of the C phase sequence relay is closed, and the I0.2 input node is effective.
6. The automatic test equipment for life test of a phase change switch according to claim 5, wherein: the digital quantity input unit 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 the Q0.0 terminal, and the second intermediate relay is connected with the 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 the 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 simultaneously closed;
when the Q0.1 terminal is closed, the second intermediate relay is closed.
7. The automatic test equipment for life test of a phase change 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 transmitter assembly, and the second analog quantity channel is connected with the current transmitter.
8. The automatic test equipment for life test of a phase change 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 SR20;
the model of the analog quantity expansion module is Siemens EMAE08;
the current transmitter is of a type of full-scale FKSDJI;
the types of the A phase sequence relay, the B phase sequence relay and the C phase sequence relay are Zhengtai XJ3-G;
the types of the first alternating-current contactor and the second alternating-current contactor are Schneider LC1D09M7C;
the first intermediate relay and the second intermediate relay are of the type Schneider RXM2LB2BD;
the voltage transmitter assembly is provided with four voltage transformers, and the types of the four voltage transformers are full-scale 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 transducer is 0 AAC-300 AAC, and the output is 0 VDC-10 VDC.
9. A test method based on a life test automatic test device for a phase change switch, characterized in that the test is performed by using the life test automatic test device for a phase change switch according to any one of claims 1 to 8, comprising the steps of:
step one, setting test parameters;
step two, judging whether the current phase of the phase change switch is a working phase or not, 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 a phase change switch performs phase change in a T time period, if so, entering a step eight, and if not, entering a step five;
step five, counting the total number of actual commutation;
step six, judging whether the actual total commutation times and the sub-times are the same as the test parameters of the step one, if so, entering a step seven, and if not, entering a step four;
step seven, completing the test to obtain a test report;
and step eight, ending.
10. The testing method of the automatic testing device based on the life test of the phase change switch according to claim 9, wherein: the test parameters are test types, commutation times, phase-separated time and open-phase voltage protection fixed values;
the times of the sub-phase are the times of the actions of the phase sequence relay A, the times of the actions of the phase sequence relay B and the times of the actions of the phase sequence relay C;
the total times are the sum of the times of actions of the phase sequence relay A, the times of actions of the phase sequence relay B and the times of actions of the phase sequence relay C;
the T is 1min.
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