Insulation and voltage resistance test control system and method

Abstract

The invention relates to an insulation and voltage resistance test control system and method. The system comprises a test power supply, a first switch, an intelligent controller and an insulation and voltage resistance tester. The first switch comprises a first sub-switch and a second sub-switch; the first sub-switch and the second sub-switch are normally open switches; the test power supply is connected with the input end of the insulation and voltage resistance tester through the first sub-switch; the second sub-switch is connected with the intelligent controller; the insulation and voltage resistance tester is also connected with the intelligent controller; and the output end of the insulation and voltage resistance tester is connected with the photovoltaic module. According to the invention, the reliability of controlling the insulation and voltage resistance tester by the intelligent controller can be improved, and the test efficiency is improved.

Description

Technical Field

[0001] The present disclosure relates to the field of photovoltaic module testing equipment, and in particular to an insulation withstand voltage test control system and method. Background Art

[0002] The insulation withstand voltage test of photovoltaic modules is an important part of verifying the electrical safety and reliability of photovoltaic modules, and it needs to be carried out during the manufacturing process and daily use of photovoltaic modules.

[0003] In automated production equipment, an intelligent controller is usually used in conjunction with an insulation withstand voltage tester to control the process and record and feedback the test results through communication. However, various electromagnetic interferences are often encountered during the production process. Such interferences may cause communication abnormalities, making it impossible to control the insulation withstand voltage tester, resulting in low test efficiency. Summary of the invention

[0004] In order to overcome the problems existing in the related art, the embodiments of the present disclosure provide an insulation withstand voltage test control system and method. The technical solution is as follows:

[0005] According to a first aspect of an embodiment of the present disclosure, there is provided an insulation withstand voltage test control system, comprising:

[0006] Test the power supply, first switch, intelligent controller and insulation withstand voltage tester;

[0007] The first switch includes: a first sub-switch and a second sub-switch; the first sub-switch and the second sub-switch are both normally open switches;

[0008] The test power supply is connected to the input terminal of the insulation withstand voltage tester through the first sub-switch;

[0009] The second sub-switch is connected to the intelligent controller;

[0010] The insulation withstand voltage tester is also connected to the intelligent controller;

[0011] The output end of the insulation withstand voltage tester is connected to the photovoltaic module.

[0012] In one embodiment, the invention further comprises: a second switch,

[0013] The second switch includes: a third sub-switch and a fourth sub-switch; the third sub-switch is a normally closed switch, and the fourth sub-switch is a normally open switch;

[0014] The test power supply is connected to the input terminal of the insulation withstand voltage tester through the first sub-switch and the third sub-switch in sequence;

[0015] The fourth sub-switch is connected to the intelligent controller.

[0016] In one embodiment, it further includes: a relay;

[0017] The relay comprises: a coil, a third switch, a fourth switch and a fifth switch;

[0018] The test power supply is connected to the input end of the insulation withstand voltage tester through the first sub-switch, the third sub-switch and the coil in sequence;

[0019] The third switch is connected to the intelligent controller;

[0020] The output end of the insulation withstand voltage tester is connected to the photovoltaic assembly through the fourth switch;

[0021] The fifth switch is connected in parallel with the first sub-switch;

[0022] Wherein, after the coil is powered on, the third switch, the fourth switch and the fifth switch are all closed.

[0023] According to a second aspect of an embodiment of the present disclosure, a method for controlling an insulation withstand voltage test is provided. The method is applied to an intelligent controller of an insulation withstand voltage test control system as described in any embodiment of the first aspect, and the method includes:

[0024] After detecting that the first sub-switch and the second sub-switch are closed, sending a test start signal to the insulation withstand voltage tester, wherein the test start signal includes: a test preparation instruction and a test parameter instruction;

[0025] Detecting whether a test success start instruction sent by the insulation withstand voltage tester is received within a first preset time period;

[0026] If the test success start instruction is not received within the first preset time period, performing fault detection;

[0027] After the detection is completed, the first fault information is output.

[0028] In one embodiment, the method further comprises:

[0029] Sending a first test work end signal to the insulation withstand voltage tester, wherein the first test work end signal includes: a first test end instruction and a first test result feedback instruction;

[0030] Detecting whether a first test result sent by the insulation withstand voltage tester is received within a second preset time period;

[0031] If the first test result is not received within the second preset time period, performing fault detection;

[0032] After the detection is completed, the second fault information is output.

[0033] In one embodiment, after detecting that the first sub-switch and the second sub-switch are closed, sending a test start signal to the insulation withstand voltage tester includes:

[0034] After detecting that the first sub-switch is closed, the second sub-switch is closed, the third sub-switch is closed, and the fourth sub-switch is opened, the test work start signal is sent to the insulation withstand voltage tester.

[0035] In one embodiment, the method further comprises:

[0036] After detecting that the third sub-switch is turned on and the fourth sub-switch is closed, sending a second test work end signal to the insulation withstand voltage tester, wherein the second test work end signal includes: a second test end instruction and a second test result feedback instruction;

[0037] Detecting whether a second test result sent by the insulation withstand voltage tester is received within a third preset time period;

[0038] If the second test result is not received within the third preset time period, performing fault detection;

[0039] After the detection is completed, the third fault information is output.

[0040] In one embodiment, after detecting that the first sub-switch is closed, the second sub-switch is closed, the third sub-switch is closed, and the fourth sub-switch is opened, sending the test work start signal to the insulation withstand voltage tester includes:

[0041] After detecting that the first sub-switch is closed, the second sub-switch is closed, the third sub-switch is closed, the fourth sub-switch is opened, and the coil is powered on, the test work start signal is sent to the insulation withstand voltage tester.

[0042] In one embodiment, after detecting that the third sub-switch is turned on and the fourth sub-switch is turned on, sending a second test work end signal to the insulation withstand voltage tester includes:

[0043] After detecting that the third sub-switch is turned on, the fourth sub-switch is turned off, and the coil is powered off, the second test work end signal is sent to the insulation withstand voltage tester.

[0044] According to a third aspect of an embodiment of the present disclosure, there is provided an insulation withstand voltage test control method, the method being applied to an insulation withstand voltage tester of an insulation withstand voltage test control system as described in any one of the embodiments of the first aspect, the method comprising:

[0045] Receive a test work start signal; the test work start signal includes: a test preparation instruction and a test parameter instruction;

[0046] Output corresponding test information according to the test parameter instruction, and send a test success start instruction to the intelligent controller.

[0047] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0049] Figure 1 is a schematic diagram of an insulation withstand voltage test control system according to an exemplary embodiment Figure 1 .

[0050] Figure 2 is a schematic diagram of an insulation withstand voltage test control system according to an exemplary embodiment Figure 2 .

[0051] Figure 3 is a schematic diagram of an insulation withstand voltage test control system according to an exemplary embodiment Figure 3 .

[0052] Figure 4 is a schematic diagram of an insulation withstand voltage test control system according to an exemplary embodiment Figure 4 .

[0053] Figure 5 is a schematic diagram of an insulation withstand voltage test control system according to an exemplary embodiment Figure 5 .

[0054] Figure 6 is a schematic diagram of an insulation withstand voltage test control system according to an exemplary embodiment Figure 6 .

[0055] Figure 7 The following is a flow chart of a method for controlling an insulation withstand voltage test according to an exemplary embodiment. Figure 1 .

[0056] Figure 8 The following is a flow chart of a method for controlling an insulation withstand voltage test according to an exemplary embodiment. Figure 2 .

[0057] Fig. 9 The following is a flow chart of a method for controlling an insulation withstand voltage test according to an exemplary embodiment. Figure 3.

[0058] Fig.10 The following is a flow chart of a method for controlling an insulation withstand voltage test according to an exemplary embodiment. Figure 4 .

[0059] Fig.11 It is a schematic diagram of the physical structure of an insulation withstand voltage test control system according to an exemplary embodiment.

[0060] Fig.12 The following is a flow chart of a method for controlling an insulation withstand voltage test according to an exemplary embodiment. Figure 5 .

[0061] Fig.13 The following is a flow chart of a method for controlling an insulation withstand voltage test according to an exemplary embodiment. Figure 6 .

[0062] Description of reference numerals:

[0063] 1-test power supply; 21-first sub-switch; 22-second sub-switch; 3-intelligent controller; 31-controller signal transceiver port; 32-first input pin; 33-controller processing module; 34-display module; 35-detection module; 36-second input pin; 37-third input pin; 4-insulation withstand voltage tester; 41-test power connection module; 42-test signal positive output terminal; 43-test signal negative output terminal; 44-tester signal transceiver port; 45-tester processing module; 5-photovoltaic module; 61-third sub-switch; 62-fourth sub-switch; 71-coil; 72-third switch; 73-fourth switch; 74-fifth switch. DETAILED DESCRIPTION

[0064] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0065] Figure 1 is a schematic diagram of an insulation withstand voltage test control system according to an exemplary embodiment. Figure 1 As shown, the insulation withstand voltage test control system includes: a test power supply 1, a first switch, an intelligent controller 3 and an insulation withstand voltage tester 4;

[0066] The first switch includes: a first sub-switch 21 and a second sub-switch 22; the first sub-switch 21 and the second sub-switch 22 are both normally open switches;

[0067] The test power supply 1 is connected to the input end of the insulation withstand voltage tester 4 through the first sub-switch 21;

[0068] The second sub-switch 22 is connected to the intelligent controller 3;

[0069] The insulation withstand voltage tester 4 is also connected to the intelligent controller 3;

[0070] The output end of the insulation withstand voltage tester 4 is connected to the photovoltaic module 5 .

[0071] Among them, when the intelligent controller 3 detects that the first sub-switch 21 and the second sub-switch 22 are closed, the intelligent controller 3 can send relevant instructions to the insulation withstand voltage tester 4. When the insulation withstand voltage tester 4 receives the instruction, it will send a response instruction corresponding to the received instruction to the intelligent controller 3. If the intelligent controller 3 does not receive the response instruction within the preset time, it indicates that there may be communication abnormality between the intelligent controller 3 and the insulation withstand voltage tester. At this time, the intelligent controller 3 can perform fault detection so that the staff can take corresponding measures for the fault, thereby improving the reliability of the intelligent controller 3 controlling the insulation withstand voltage tester 4 and improving the test efficiency.

[0072] For example, Figure 2 As shown, the intelligent controller 3 may include: a controller signal transceiver port 31 , a first input pin 32 , a controller processing module 33 , a display module 34 and a detection module 35 .

[0073] The insulation withstand voltage tester 4 may include: a test power supply connection module 41 , a test signal positive output terminal 42 , a test signal negative output terminal 43 , a tester signal transceiver port 44 and a tester processing module 45 .

[0074] The test power supply 1 is connected to the test power connection module 41 of the insulation withstand voltage tester 4 through the first sub-switch 211 in sequence, wherein the first sub-switch 21 is a normally open switch; the test signal positive output terminal 42 of the insulation withstand voltage tester 4 is connected to the short-circuited lead-out line in the photovoltaic component 5, and the test signal negative output terminal 43 of the insulation withstand voltage tester 4 is connected to the exposed metal part in the photovoltaic component 5; the tester signal transceiver port 44 of the insulation withstand voltage tester 4 is connected to the controller signal transceiver port 31 of the intelligent controller 3. The second sub-switch 22 is connected to the first input pin 32 of the intelligent controller 3.

[0075] In the present disclosure, the exposed metal part of the photovoltaic module 5 is connected to the negative output terminal 43 of the test signal of the insulation withstand voltage tester 4. If the photovoltaic module 5 has no frame, or the frame is a poor conductor, it is necessary to wrap the edge of the photovoltaic module 5 with conductive foil, and wrap all the aggregate surfaces of the photovoltaic module 5 (for example: the front and rear surfaces and the junction box) with conductive foil, and then connect the conductive foil to the negative output terminal 43 of the test signal of the insulation withstand voltage tester 4.

[0076] In the intelligent controller 3 , the controller processing module 33 of the intelligent controller 3 is respectively connected to the controller signal transceiver port 31 , the first input pin 32 , the display module 34 of the intelligent controller 3 and the detection module 35 of the intelligent controller 3 .

[0077] In the insulation withstand voltage tester 4 , the tester processing module 45 of the insulation withstand voltage tester 4 is connected to the test power connection module 41 , the test signal positive output terminal 42 , the test signal negative output terminal 43 and the tester signal transceiver port 44 respectively.

[0078] Specifically, the controller processing module 33 is used to send a test work start signal to the tester signal transceiver port 44 through the controller signal transceiver port 31 after detecting that the first input pin 32 has received the first signal. The test work start signal includes: a prepare to start test instruction and a test parameter instruction; the first signal is the corresponding signal after the second sub-switch 22 is closed; the controller processing module 33 is used to detect that the controller signal transceiver port 31 has not received the test success start instruction sent by the tester signal transceiver port 44 within a first preset time length, then the control detection module 35 enters the fault detection stage, and outputs the first fault information through the display module 34 after the detection is completed.

[0079] Among them, when testing the photovoltaic component 5, the first sub-switch 21 and the second sub-switch 22 can be closed. At this time, the controller processing module 33 will detect that the first input pin 32 receives the first signal corresponding to the closed second sub-switch 22. Next, the controller processing module 33 sends a test start signal to the tester signal transceiver port 44 through the controller signal transceiver port 31. At this time, if there is electromagnetic interference or other reasons that cause the communication to fail to proceed normally, that is, the tester signal transceiver port 44 cannot receive the test start signal sent by the controller signal transceiver port 31, then the tester signal transceiver end cannot feedback the test success start instruction in response to the test start signal to the controller signal transceiver port 31. In the related technology, the intelligent controller 3 cannot know that the insulation withstand voltage tester 4 cannot receive the test start signal. Instead of receiving the test work start signal, it will be assumed that the insulation withstand voltage tester 4 is working normally, resulting in the test being unable to proceed normally. However, in the present disclosure, if the controller signal transceiver port 31 of the intelligent controller 3 does not receive the test success start instruction sent by the tester signal transceiver port 44 within the first preset time period, it will be assumed that the insulation withstand voltage tester 4 cannot receive the test work start signal. At this time, the intelligent controller 3 cannot control the insulation withstand voltage tester 4 normally, and then, the controller processing module 33 will control the detection module 35 to enter the fault detection stage, and output the first fault information through the display module 34 after the detection is completed, so that the staff can see the fault at this time through the display module 34, and then perform corresponding processing, thereby improving the reliability of the intelligent controller 3 controlling the insulation withstand voltage tester 4 and improving the test efficiency.

[0080] In one possible implementation, an alarm module may also be provided in the intelligent controller 3. If the controller processing module 33 detects that the controller signal transceiver port 31 has not received the test success start instruction sent by the tester signal transceiver port 44 within the first preset time, an alarm may be issued through the alarm module to remind the staff. Of course, the display module 34 of the intelligent controller 3 may also be a touch display screen, so that not only the first fault information can be displayed through the touch display screen, but also an alarm sound can be issued through the touch display screen.

[0081] When the intelligent controller 3 and the insulation withstand voltage tester 4 can communicate normally, the tester processing module 45 is used to control the test power connection module 41 to be turned on after detecting that the tester signal transceiver port 44 receives the test work start signal, so as to prepare to start the test work, output the test signal to the photovoltaic component 5 through the test signal positive output terminal 42 and the test signal negative output terminal 43 according to the test parameter instruction, and send a test success start instruction to the controller signal transceiver port 31 through the tester signal transceiver port 44. Since normal communication is possible, the insulation withstand voltage tester 4 can receive the test work start signal sent by the intelligent controller 3, and can feedback the test success start instruction in response to the test work start signal to the intelligent controller 3. When the intelligent controller 3 receives the test success start instruction, it can be known that the insulation withstand voltage tester 4 is working normally and the communication between them is normal.

[0082] In one embodiment, the intelligent controller 3 may also send a first test work end signal to the insulation withstand voltage tester 4, so that the first test work end signal ends the current test work, specifically:

[0083] The controller processing module 33 is further used to send a first test work end signal to the tester signal transceiver port 44 through the controller signal transceiver port 31, wherein the first test work end signal includes: a first test end instruction and a first test result feedback instruction.

[0084] The controller processing module 33 is used to detect that the controller signal transceiver port 31 has not received the first test result sent by the tester signal transceiver port 44 within the second preset time length, control the detection module 35 to enter the fault detection stage, and output the second fault information through the display module 34 after the detection is completed.

[0085] The controller processing module 33 sends a first test work end signal to the tester signal transceiver port 44 through the controller signal transceiver port 31. At this time, if electromagnetic interference or other reasons cause the communication to fail normally, that is, the tester signal transceiver port 44 cannot receive the first test work end signal sent by the controller signal transceiver port 31, then the insulation withstand voltage tester 4 cannot stop the test work, but continues the test, and the tester signal transceiver cannot feedback the first test result in response to the first test work end signal to the controller signal transceiver port 31. In the related art, the intelligent controller 3 cannot know that the insulation withstand voltage tester 4 cannot receive the first test work end signal, but will default to the insulation withstand voltage tester 4 receiving the first test work end signal, and then wait for the first test result sent by the insulation withstand voltage tester 4. At the same time, the insulation withstand voltage tester 4 does not know that the intelligent controller 3 allows it to stop the test work and send the first test result at this time. The result is that the insulation withstand voltage tester 4 continues to test, which may cause the tested photovoltaic component 5 to be broken down by high voltage, or the tested photovoltaic component 5 to be short-circuited and poorly insulated, causing safety problems such as leakage. However, in the present disclosure, if the controller signal transceiver port 31 of the intelligent controller 3 does not receive the first test result sent by the tester signal transceiver port 44 within the second preset time period, it is assumed that the insulation withstand voltage tester 4 cannot receive the first test work end signal. At this time, the intelligent controller 3 cannot normally control the stop of the insulation withstand voltage tester 4, and then, the controller processing module 33 will control the detection module 35 to enter the fault detection stage, and output the second fault information through the display module 34 after the detection is completed, so that the staff can see the fault at this time through the display module 34, and then perform corresponding processing, thereby improving the reliability of the intelligent controller 3 controlling the insulation withstand voltage tester 4, and avoiding the safety problem caused by the inability of the intelligent controller 3 to control the stop of the insulation withstand voltage tester 4.

[0086] When the intelligent controller 3 and the insulation withstand voltage tester 4 can communicate normally, the tester processing module 45 is used to control the test power supply connection module 41 to stop the test after detecting that the tester signal transceiver port 44 receives the first test work end signal sent by the controller signal transceiver port 31, and send the first test result to the controller signal transceiver port 31 through the tester signal transceiver port 44. Since the communication is normal, the insulation withstand voltage tester 4 can receive the first test work end signal sent by the intelligent controller 3, and can feed back the first test result in response to the first test work end signal to the intelligent controller 3. When the intelligent controller 3 receives the first test result, it can be known that the insulation withstand voltage tester 4 has stopped the test work and the communication between them is normal.

[0087] In one possible implementation, Figure 3 As shown, it also includes: a second switch;

[0088] The second switch includes: a third sub-switch 61 and a fourth sub-switch 62; the third sub-switch 61 is a normally closed switch, and the fourth sub-switch 62 is a normally open switch; that is, the closing states of the third sub-switch 61 and the fourth sub-switch 62 are opposite; when the second switch is not pressed, the third sub-switch 61 is closed and the fourth sub-switch 62 is open, and after the second switch is pressed, the third sub-switch 61 is opened and the fourth sub-switch 62 is closed.

[0089] The test power supply 1 is connected to the input end of the insulation withstand voltage tester 4 through the first sub-switch 21 and the third sub-switch 61 in sequence;

[0090] The fourth sub-switch 62 is connected to the intelligent controller 3 .

[0091] For example, Figure 4 As shown, in this embodiment, the intelligent controller 3 further includes: a second input pin 36 .

[0092] The test power supply 1 module is connected to the test power supply connection module 41 through the first sub-switch 21 and the third sub-switch 61 in sequence;

[0093] The fourth sub-switch 62 is connected to the second input pin 36 of the intelligent controller 3;

[0094] The controller processing module 33 is specifically used to send a test work start signal to the tester signal transceiver port 44 through the controller signal transceiver port 31 after detecting that the first input pin 32 receives the first signal and the second input pin 36 does not receive the second signal; the second signal is the signal corresponding to the closing of the fourth sub-switch 62.

[0095] The controller processing module 33 is further used to send a second test work end signal to the tester signal transceiver port 44 through the controller signal transceiver port 31 after detecting that the second input pin 36 receives the second signal. The second test work end signal includes: a second test end instruction and a second test result feedback instruction;

[0096] The controller processing module 33 is used to detect that the second test result is not received within the third preset time period, and then control the detection module 35 to enter the fault detection phase, and output the third fault information through the display module 34 after the detection is completed.

[0097] When it is necessary to manually stop the testing work of the insulation withstand voltage tester 4 midway, the second switch can be manually turned off. Since the third sub-switch 61 in the second switch is a normally closed switch and the fourth sub-switch 62 is a normally open switch, when the second switch is triggered, the third sub-switch 61 becomes an open state and the fourth sub-switch 62 becomes a closed state.

[0098] After the controller processing module 33 detects that the second input pin 36 receives the second signal, indicating that the staff wants to end the test work of the insulation withstand voltage tester 4, the controller processing module 33 sends the second test work end signal to the tester signal transceiver port 44 through the controller signal transceiver port 31. At this time, if electromagnetic interference or other reasons cause the communication to fail normally, that is, the tester signal transceiver port 44 cannot receive the second test work end signal sent by the controller signal transceiver port 31, then the insulation withstand voltage tester 4 cannot stop the test work, but continues to test, and the tester signal transceiver cannot feedback the second test result in response to the second test work end signal to the controller signal transceiver port 31. In the related art, the insulation withstand voltage tester 4 does not know that the intelligent controller 3 allows it to stop the test work and send the second test result at this time, which causes the insulation withstand voltage tester 4 to continue testing. It is possible to cause the photovoltaic component 5 under test to be broken down by high voltage, or the photovoltaic component 5 under test to be short-circuited and poorly insulated, causing safety problems such as leakage. However, in the present disclosure, if the controller signal transceiver port 31 of the intelligent controller 3 does not receive the second test result sent by the tester signal transceiver port 44 within the third preset time period, it is assumed that the insulation withstand voltage tester 4 cannot receive the second test work end signal. At this time, the intelligent controller 3 cannot normally control the stop of the insulation withstand voltage tester 4, and then, the controller processing module 33 will control the detection module 35 to enter the fault detection stage, and output the third fault information through the display module 34 after the detection is completed, so that the staff can see the fault at this time through the display module 34, and then perform corresponding processing, thereby improving the reliability of the intelligent controller 3 controlling the insulation withstand voltage tester 4, and avoiding the safety problem caused by the inability of the intelligent controller 3 to control the stop of the insulation withstand voltage tester 4.

[0099] In one possible implementation, Figure 5 As shown, it also includes: a relay;

[0100] The relay comprises: a coil 71, a third switch 72, a fourth switch 73 and a fifth switch;

[0101] The test power supply 1 is connected to the input end of the insulation withstand voltage tester 4 through the first sub-switch 21, the third sub-switch 61 and the coil 71 in sequence;

[0102] The third switch 72 is connected to the intelligent controller 3;

[0103] The output end of the insulation withstand voltage tester 4 is connected to the photovoltaic assembly 5 through the fourth switch 73;

[0104] The fifth switch is connected in parallel with the first sub-switch 21;

[0105] After the coil 71 is powered on, the third switch 72 , the fourth switch 73 and the fifth switch are all closed.

[0106] For example, Figure 6 As shown, in this embodiment, the intelligent controller 3 further includes: a third input pin 37 .

[0107] The third switch 72 in the relay is connected to the third input pin 37 of the intelligent controller 3;

[0108] The test signal positive output terminal 42 is connected to the short-circuited lead wire in the photovoltaic module 5 through the fourth switch 73 in the relay;

[0109] The fifth switch 74 in the relay is connected in parallel with the first sub-switch 21;

[0110] The controller processing module 33 is specifically used to send a test work start signal to the tester signal transceiver port 44 through the controller signal transceiver port 31 after detecting that the first input pin 32 receives the first signal, the second input pin 36 does not receive the second signal, and the third input pin 37 receives the third signal;

[0111] After the coil 71 of the relay is powered on, the third switch 72 is closed, the fourth switch 73 is closed, and the fifth switch 74 is closed.

[0112] The controller processing module 33 is further configured to send a second test work end signal to the tester signal transceiver port 44 through the controller signal transceiver port 31 after detecting that the second input pin 36 receives the second signal and the third input pin 37 does not receive the third signal.

[0113] After the relay is set, when the controller processing module 33 detects that the second input pin 36 receives the second signal and the third input pin 37 does not receive the third signal, it indicates that the testing work of the insulation withstand voltage tester 4 needs to be stopped halfway. The controller processing module 33 sends a second test work end signal to the tester signal transceiver port 44 through the controller signal transceiver port 31.

[0114] Figure 7 1 is a flow chart of an insulation withstand voltage test control method according to an exemplary embodiment. The method is applied to an intelligent controller of an insulation withstand voltage test control system as in any of the above embodiments. The method includes the following sub-steps S101-S104:

[0115] S101. After detecting that the first sub-switch and the second sub-switch are closed, sending a test start signal to the insulation withstand voltage tester, wherein the test start signal includes: a test preparation instruction and a test parameter instruction.

[0116] S102: Detect whether a test success start instruction sent by the insulation withstand voltage tester is received within a first preset time period.

[0117] S103: If no test success start instruction is received within the first preset time period, perform fault detection.

[0118] S104: After the detection is completed, output the first fault information.

[0119] Among them, when the intelligent controller detects that the first sub-switch and the second sub-switch are closed, the intelligent controller can send a test start signal to the insulation withstand voltage tester. When the insulation withstand voltage tester receives the test start signal, it will send a test success start instruction corresponding to the test start signal to the intelligent controller. If the intelligent controller does not receive the test success start instruction within the first preset time, it indicates that there may be communication abnormalities between the intelligent controller and the insulation withstand voltage tester. At this time, the intelligent controller can perform fault detection and output the first fault information after the detection is completed, so that the staff can perform corresponding processing on the fault according to the first fault information, thereby improving the reliability of the intelligent controller's control over the insulation withstand voltage tester and improving the test efficiency.

[0120] In one embodiment, Figure 8 As shown, the above method may further include the following steps S105-S108:

[0121] S105, sending a first test work end signal to the insulation withstand voltage tester, wherein the first test work end signal includes: a first test end instruction and a first test result feedback instruction;

[0122] S106, detecting whether a first test result sent by the insulation withstand voltage tester is received within a second preset time period;

[0123] S107, if the first test result is not received within the second preset time period, perform fault detection;

[0124] S108: After the detection is completed, output the second fault information.

[0125] The specific implementation method is the same as above Figure 1 and Figure 2 The execution steps of the intelligent controller in the corresponding embodiment are similar and will not be repeated here.

[0126] In one embodiment, when the system includes a second switch, the above step S101 may include the following sub-steps:

[0127] After detecting that the first sub-switch is closed, the second sub-switch is closed, the third sub-switch is closed, and the fourth sub-switch is opened, a test work start signal is sent to the insulation withstand voltage tester.

[0128] In one embodiment, Fig. 9 As shown, when the system includes a second switch, the method further includes the following sub-steps S109-S1012:

[0129] S109, after detecting that the third sub-switch is turned on and the fourth sub-switch is turned on, sending a second test work end signal to the insulation withstand voltage tester, the second test work end signal including: a second test end instruction and a second test result feedback instruction;

[0130] S1010, detecting whether a second test result sent by the insulation withstand voltage tester is received within a third preset time period;

[0131] S1011, if the second test result is not received within the third preset time period, perform fault detection;

[0132] S1012: After the detection is completed, output the third fault information.

[0133] The specific implementation method is the same as above Figure 3 and Figure 4 The steps performed by the intelligent controller in the corresponding embodiment are similar and will not be repeated here.

[0134] In one embodiment, when a relay is included in the system, the above step S101 may include the following sub-steps:

[0135] After detecting that the first sub-switch is closed, the second sub-switch is closed, the third sub-switch is closed, the fourth sub-switch is opened and the coil is powered on, a test start signal is sent to the insulation withstand voltage tester.

[0136] In one embodiment, when a relay is included in the system, the above step S109 may include the following sub-steps:

[0137] After detecting that the third sub-switch is opened, the fourth sub-switch is closed, and the coil is powered off, a second test work end signal is sent to the insulation withstand voltage tester.

[0138] The specific implementation method is the same as above Figure 5 and Figure 6 The corresponding embodiments are similar and will not be described again here.

[0139] Fig.10 1 is a flow chart of an insulation withstand voltage test control method according to an exemplary embodiment. The method is applied to an insulation withstand voltage tester of an insulation withstand voltage test control system as in any of the above embodiments. The method includes the following sub-steps S201-S202:

[0140] S201, receiving a test work start signal; the test work start signal includes: a prepare to start test instruction and a test parameter instruction.

[0141] S202. Output corresponding test information according to the test parameter instruction, and send a test success start instruction to the intelligent controller.

[0142] In one embodiment, after receiving the first test work completion signal, the insulation withstand voltage tester stops the test and sends the first test result to the intelligent controller.

[0143] The specific implementation method is similar to the steps performed by the insulation withstand voltage tester in the above embodiments, and will not be repeated here.

[0144] Fig.11 is a schematic diagram of an insulation withstand voltage test control system according to an exemplary embodiment. Figure 4 As shown, the test power supply 1 in the above embodiments is DC24V, the first switch is SB1, the first sub-switch 21 includes the contact 1 and the contact 2 of SB1, and the second sub-switch 22 includes the contact 3 and the contact 4 of SB1; the second switch is SB2, the third sub-switch 61 in the second switch includes the contact 1 and the contact 2 of SB2, the fourth sub-switch 62 in the second switch includes the contact 3 and the contact 4 of SB2, the relay is KA1, the two ends of the coil 71 of the relay are A1 and A2 respectively, the third switch 72 of the relay includes the contact 31 and the contact 34 of KA1, the fourth switch 73 of the relay includes the contact 21 and the contact 24 of KA1, and the fifth switch 74 of the relay includes the contact 1 of KA1. 1 contact and 14 contacts, the first input pin 32 of the intelligent controller 3 is IN1, the second input pin 36 of the intelligent controller 3 is IN2, the third input pin 37 of the intelligent controller 3 is IN3, the controller signal transceiver port 31 of the intelligent controller 3 is the port for connecting the communication bus with the intelligent controller 3, the tester signal transceiver port 44 of the insulation withstand voltage tester 4 is the port for connecting the communication bus with the insulation withstand voltage tester 4, the test power supply connection module 41 of the insulation withstand voltage tester 4 is the part between C1 and C2 of the insulation withstand voltage tester 4, the test signal positive output terminal 42 of the insulation withstand voltage tester 4 is OUT1, and the test signal negative output terminal 43 of the insulation withstand voltage tester 4 is OUT2.

[0145] Specific:

[0146] SB1: Start button, the button is equipped with two contacts, contacts 1 and 2 are normally open contacts (NO), contacts 3 and 4 are normally open contacts (NO);

[0147] SB2: Stop button, the button is equipped with two contacts, contacts 1 and 2 are normally closed contacts (NC), contacts 3 and 4 are normally open contacts (NO);

[0148] KA1: relay. The relay has a coil 71. The two connection points of the coil 71 are A1 and A2. The relay has three contacts. Contacts 11 and 14 are a group of normally open contacts (NO), contacts 21 and 24 are a group of normally open contacts (NO), and contacts 31 and 34 are a group of normally open contacts (NO).

[0149] Intelligent controller 3: IN is the input point of the controller, COM is the common point of the access point, IN and COM are a set of logic control loops;

[0150] Insulation withstand voltage tester 4: C1 and C2 are ready normally open contacts (NO), OUT1 and OUT2 are output circuits.

[0151] Fig.12 The corresponding control process is as follows Fig.13 As shown, Fig.13 As shown, the following steps S301-S3010 are included:

[0152] S301: The intelligent controller detects whether a start signal is received.

[0153] S302: When the start button SB1 is not pressed, the intelligent controller does not receive the start signal, and the entire insulation withstand voltage test control system is in standby mode. S303: When the start button SB1 is pressed, there is a signal in IN1 of the intelligent controller, and the intelligent controller carries the start and test instruction content in the start instruction (equivalent to the test work start signal in the above embodiment) and sends it to the insulation withstand voltage tester through the communication bus. After the insulation withstand voltage tester receives the start instruction, the ready C1 and C2 contacts are connected, the control circuits of A1 and A2 of the coil of the KA1 relay are connected, the three groups of normally open contacts of KA1 are connected, the output circuit OUT1 of the insulation withstand voltage tester is connected, the control circuit (the circuit between DC24V and 0V) is powered on and maintained, the IN3 circuit of the intelligent controller is fed back, and the system proceeds to the next step.

[0154] S304: The intelligent controller makes a judgment and detects whether a feedback instruction indicating that the insulation withstand voltage tester has been started (equivalent to the test success start instruction in the above embodiment) is received.

[0155] S305: If no feedback instruction is received, the intelligent controller enters fault detection.

[0156] S306: If a feedback instruction is received, the system enters the test and waits for the test result, and then proceeds to the next step.

[0157] S307: Determine whether the test needs to be stopped midway.

[0158] S308: When the stop button SB2 is not pressed, wait for the test result and the test ends.

[0159] S309: Press the stop button SB2, indicating that the test needs to be stopped midway. There is a signal in IN2 of the intelligent controller, the control circuit (the loop between DC24V and 0V) is disconnected, the coil of the KA1 relay loses power, and the contacts that were previously started and connected are disconnected. The intelligent controller sends a stop and obtain test result instruction (equivalent to the test work end signal in the above embodiment). After the insulation withstand voltage tester receives the instruction, the ready C1 and C2 contacts are disconnected, the output loop OUT1 of the insulation withstand voltage tester is disconnected, and the IN3 loop of the intelligent control module receives feedback, and the system proceeds to the next step of judgment.

[0160] S3010: Whether the intelligent controller receives the feedback signal sent by the insulation withstand voltage tester that the operation has stopped (this signal includes the test result). If the feedback signal is received, the intelligent controller waits for the test result and the test ends; if no feedback signal is received, the system enters fault detection.

[0161] Fig.13 The system operation and fault handling process of the present disclosure is shown, including the following sub-steps S401-S406:

[0162] S401: The system enters the fault handling procedure, and the intelligent controller determines whether a signal from the stop button (SB2) is received.

[0163] S402: If not, exit the fault handling program and the system returns Fig.12 The main program shown in .

[0164] S403: If a signal from the stop button is received, when restart is required, the intelligent controller receives a signal from the start button SB1, and sends the corresponding start instruction and test content to the insulation withstand voltage tester; when stopping is required, after the intelligent controller receives the stop button signal, the intelligent controller sends the corresponding stop and obtain test result instructions, and the intelligent controller waits for the feedback instruction from the insulation withstand voltage tester, and the system proceeds to the next step.

[0165] S404: The intelligent controller determines whether a feedback instruction is received.

[0166] S405: If received, exit fault detection and return Fig.13 The procedure shown in .

[0167] S406: If no feedback instruction is received, perform fault analysis and output prompt alarm information.

[0168] In public, if the start command fails to be sent due to electromagnetic interference, the insulation withstand voltage tester will not receive the start command, the ready C1 and C2 contacts of the insulation withstand voltage tester will not be connected, the start circuit of the relay will not be turned on, the KA1 protection relay will not be energized, and the 21 / 24 contacts of KA1 will not be connected. The detection module of the intelligent controller will be executed, and after the detection is completed, the corresponding fault will be prompted in the display module.

[0169] In the prior art, the intelligent controller directly controls the insulation withstand voltage tester through the communication line, including equipment startup and parameter transmission and test result transmission, etc. The present disclosure adopts dual-path startup control, one of which is to transmit the signal of the start button to the intelligent controller, and the intelligent controller then starts and controls the insulation withstand voltage tester through communication instructions, and the other is to control the start and stop through a control loop composed of a stop button, a relay and the ready contact of the insulation withstand voltage tester. Furthermore, in the present disclosure, the output circuit switch control protection of the insulation withstand voltage tester avoids outputting high voltage to the photovoltaic module, causing damage to the photovoltaic module, and the present disclosure also solves the influence of communication interference such as electromagnetic interference on the system start and stop control.

[0170] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The description and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0171] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. An insulation withstand voltage test control system, characterized in that: include: Testing the power supply (1), the first switch, the intelligent controller (3) and the insulation withstand voltage tester (4); The first switch comprises: a first sub-switch (21) and a second sub-switch (22); the first sub-switch (21) and the second sub-switch (22) are both normally open switches; The test power supply (1) is connected to the input end of the insulation withstand voltage tester (4) via the first sub-switch (21); The second sub-switch (22) is connected to the intelligent controller (3); The insulation withstand voltage tester (4) is also connected to the intelligent controller (3); The output end of the insulation withstand voltage tester (4) is connected to the photovoltaic module (5).

2. The system according to claim 1, characterized in that Also includes: The second switch, The second switch comprises: a third sub-switch (61) and a fourth sub-switch (62); the third sub-switch (61) is a normally closed switch, and the fourth sub-switch (62) is a normally open switch; The test power supply (1) is connected to the input end of the insulation withstand voltage tester (4) via the first sub-switch (21) and the third sub-switch (61) in sequence; The fourth sub-switch (62) is connected to the intelligent controller (3).

3. The system according to claim 2, characterized in that Also includes: Relay; The relay comprises: a coil (71), a third switch (72), a fourth switch (73) and a fifth switch; The test power supply (1) is connected to the input end of the insulation withstand voltage tester (4) via the first sub-switch (21), the third sub-switch (61) and the coil (71) in sequence; The third switch (72) is connected to the intelligent controller (3); The output end of the insulation withstand voltage tester (4) is connected to the photovoltaic assembly (5) via the fourth switch (73); The fifth switch is connected in parallel with the first sub-switch (21); Wherein, after the coil (71) is powered on, the third switch (72), the fourth switch (73) and the fifth switch are all closed.

4. A method for controlling insulation withstand voltage test, characterized in that: The method is applied to the intelligent controller of the insulation withstand voltage test control system according to any one of claims 1 to 3, and the method comprises: After detecting that the first sub-switch and the second sub-switch are closed, sending a test start signal to the insulation withstand voltage tester, wherein the test start signal includes: a test preparation instruction and a test parameter instruction; Detecting whether a test success start instruction sent by the insulation withstand voltage tester is received within a first preset time period; If the test success start instruction is not received within the first preset time period, performing fault detection; After the detection is completed, the first fault information is output.

5. The method according to claim 4, characterized in that The method further comprises: Sending a first test work end signal to the insulation withstand voltage tester, wherein the first test work end signal includes: a first test end instruction and a first test result feedback instruction; Detecting whether a first test result sent by the insulation withstand voltage tester is received within a second preset time period; If the first test result is not received within the second preset time period, performing fault detection; After the detection is completed, the second fault information is output.

6. The method according to claim 5, characterized in that After detecting that the first sub-switch and the second sub-switch are closed, sending a test start signal to the insulation withstand voltage tester comprises: After detecting that the first sub-switch is closed, the second sub-switch is closed, the third sub-switch is closed, and the fourth sub-switch is opened, the test work start signal is sent to the insulation withstand voltage tester.

7. The method according to claim 6, characterized in that The method further comprises: After detecting that the third sub-switch is turned on and the fourth sub-switch is closed, sending a second test work end signal to the insulation withstand voltage tester, wherein the second test work end signal includes: a second test end instruction and a second test result feedback instruction; Detecting whether a second test result sent by the insulation withstand voltage tester is received within a third preset time period; If the second test result is not received within the third preset time period, performing fault detection; After the detection is completed, the third fault information is output.

8. The method according to claim 7, characterized in that After detecting that the first sub-switch is closed, the second sub-switch is closed, the third sub-switch is closed, and the fourth sub-switch is opened, sending the test work start signal to the insulation withstand voltage tester includes: After detecting that the first sub-switch is closed, the second sub-switch is closed, the third sub-switch is closed, the fourth sub-switch is opened, and the coil is powered on, the test work start signal is sent to the insulation withstand voltage tester.

9. The method according to claim 8, characterized in that After detecting that the third sub-switch is turned on and the fourth sub-switch is turned on, sending a second test work end signal to the insulation withstand voltage tester comprises: After detecting that the third sub-switch is turned on, the fourth sub-switch is turned off, and the coil is powered off, the second test work end signal is sent to the insulation withstand voltage tester.

10. A method for controlling insulation withstand voltage test, characterized in that: The method is applied to an insulation withstand voltage tester of an insulation withstand voltage test control system according to any one of claims 1 to 3, and the method comprises: Receive a test work start signal; the test work start signal includes: a test preparation instruction and a test parameter instruction; Output corresponding test information according to the test parameter instruction, and send a test success start instruction to the intelligent controller.

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