CN114002567A - Rapid one-key test system and method for insulation performance - Google Patents
Rapid one-key test system and method for insulation performance Download PDFInfo
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- CN114002567A CN114002567A CN202111321790.XA CN202111321790A CN114002567A CN 114002567 A CN114002567 A CN 114002567A CN 202111321790 A CN202111321790 A CN 202111321790A CN 114002567 A CN114002567 A CN 114002567A
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- 238000009413 insulation Methods 0.000 title claims abstract description 39
- 230000005284 excitation Effects 0.000 claims abstract description 10
- 238000010998 test method Methods 0.000 claims abstract description 7
- 238000007599 discharging Methods 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 12
- 238000004353 relayed correlation spectroscopy Methods 0.000 claims description 6
- 229920002574 CR-39 Polymers 0.000 claims description 3
- 201000002372 amelogenesis imperfecta type 1G Diseases 0.000 claims description 3
- 230000000087 stabilizing Effects 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 4
- 238000001514 detection method Methods 0.000 abstract 6
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 238000011056 performance test Methods 0.000 description 4
- 238000002955 isolation Methods 0.000 description 3
- 230000032683 aging Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000016507 interphase Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001360 synchronised Effects 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
Abstract
The invention discloses a rapid one-key test system and a rapid one-key test method for insulation performance, which comprises a channel switching module, a discharge control module, a measurement discharge switching module, a high-voltage excitation module and an acquisition input module, the channel switching module comprises A, B, C, N, G five channel switching circuits, the channel switching circuit A comprises a relay K2 and a relay K3, the channel switching circuit B comprises a relay K4 and a relay K5, the invention leads the three-phase end part of the tested equipment to the body of the testing instrument through a test wire, the instrument performs internal wiring switching through a switch, meanwhile, the method supports the remote detection of the insulation performance of the distribution network equipment by using an intelligent terminal (such as a mobile phone and the like) without manual field operation of personnel, the detection of the insulation performance of the equipment can really realize the conversion from shaking detection to remote detection and from repeated manual detection to one-key automatic detection.
Description
Technical Field
The invention relates to the technical field of electrical testing, in particular to a quick one-key testing system and method for insulation performance.
Background
In the power industry, the digital megohmmeter is mainly used for measuring the insulation resistance of electric equipment such as a generator, a transformer, a mutual inductor, a motor, a power cable, a lightning arrester and the like, can sensitively reflect the insulation condition of the tested equipment through insulation resistance testing, and can effectively find the defects of local or overall equipment wetting and dirt, insulation damage, severe overheating and aging and the like. At present, when the insulation values of all loops of distribution network equipment are measured (for example, bus three-phase insulation value test items include A-BCE, B-ACE and C-ABE), in the test process, after the insulation resistance of each phase is tested, the tested equipment needs to be fully discharged and test wiring needs to be switched to measure the insulation resistance of the next phase. The testing method needs to frequently discharge the tested equipment and switch test wiring manually in operation, is low in efficiency and time-consuming, and has the risk of electric shock in the wiring disconnecting and connecting process, thus threatening the safety of personnel and equipment.
Disclosure of Invention
The present invention is directed to a system and a method for fast one-key testing of insulation performance, so as to solve the problems mentioned in the background art.
In order to achieve the purpose, the invention provides the following technical scheme:
a quick one-key test system for insulation performance comprises a channel switching module, a discharge control module, a measurement discharge switching module, a high-voltage excitation module and an acquisition input module, wherein the channel switching module comprises A, B, C, N, G five channel switching circuits, a channel switching circuit A comprises a relay K2 and a relay K3, a channel switching circuit B comprises a relay K4 and a relay K5, a channel switching circuit B comprises a relay K7 and a relay K9, a channel switching circuit B comprises a relay K11 and a relay K13, a channel switching circuit B comprises a relay K14 and a relay K15, a discharge control module comprises a relay K6, a relay K8, a relay K10 and a relay K12, the discharge control module comprises a relay K16, a resistor R48, a resistor R86, a resistor R87 and a resistor R88, the acquisition input module comprises a comparator U5, one end of the relay K2 is connected with a channel interface P2 and a relay K3, the other end of the relay K2 is connected with a relay K4, a relay K7, a relay K9, a relay K11, a relay K6 and a relay K8, the other end of the relay K3 is connected with an A channel interface P2, the other end of the relay K3 is connected with a relay K5, a relay K9, a relay K13, a relay K15, a relay K10 and a relay K12, the other end of the relay K4 is connected with the other ends of a B channel interface P5 and a relay K5, the other end of the relay K7 is connected with a C channel interface P10 and the other end of the relay K9, the other end of the relay K11 is connected with the other ends of an N channel interface P14 and a relay K13, the other end of the relay K14 is connected with the G channel interface P14 and the other end of the relay K14, the other end of the relay K14 is connected with the other end of the relay K14, the resistor R14 is connected with the resistor R14, the other end of the resistor R87 is connected with the other end of the resistor R48 and an E-channel interface P20, the other end of the relay K6 is connected with the high-voltage excitation module, the other end of the relay K10 is connected with the inverting input end of the comparator U5 through the resistor R40, the resistor R38 and the resistor R41 which are connected IN series, the non-inverting input end of the comparator U5 is grounded, and the output end of the comparator U5 is connected with a signal ERS _ ADC _ IN.
As a still further scheme of the invention: the type of the RELAY K2 is HV-RELAY, and the types of the rest RELAYs are the same.
As a still further scheme of the invention: two ends of the relay K2 are connected in parallel with a voltage stabilizing diode D3 for protection, and the models of the rest relays are the same.
A quick one-key test method of insulating property adopts the system, replaces an external manual changeover test wire by switching of an internal circuit, completes a discharging process in the internal circuit, replaces external manual test discharging, realizes an automatic routing function, and comprises the following steps:
step A, testing A-B, and displaying a test result;
b, discharging the small resistor for 5 seconds, judging whether the resistor is qualified or not, and returning to the previous step if the resistor is not qualified;
c, grounding for 5 seconds, judging whether the product is qualified or not, and if not, returning to the previous step;
step D, testing B-C, and displaying the test result;
e, discharging the small resistor for 5 seconds, judging whether the resistor is qualified or not, and returning to the previous step if the resistor is not qualified;
f, grounding for 5 seconds, judging whether the product is qualified or not, and if not, returning to the previous step;
g, testing B-C, and displaying the test result;
h, discharging the small resistor for 5 seconds, judging whether the resistor is qualified or not, and returning to the previous step if the resistor is not qualified;
step I, grounding for 5 seconds, judging whether the test is qualified, if not, returning to the previous step, and if so, ending the test;
as a still further scheme of the invention: the test result of the step A is 60 seconds.
As a still further scheme of the invention: the test result of the step D is 60 seconds.
As a still further scheme of the invention: the test result of the step G is 60 seconds.
Compared with the prior art, the invention has the beneficial effects that:
1. the project is an upgraded version of the existing product, is simple to operate, high in efficiency and obvious in advantages, solves the problems of time and labor consumption of the existing product, wiring errors and safety risks caused by manual wire connection and replacement and the like, and obviously improves the operation efficiency and quality;
2. only once wiring is needed, so that the workload of repeated disassembling and wiring is greatly saved;
3. self-adaptive automatic discharge meets various test scenes;
4. a matrix switch is arranged in the test device, and the test device is started by one key and automatically tested;
5. the mechanical key and the TFT touch screen are operated in a dual mode, so that the operation is convenient;
6. the Bluetooth connection and remote control of the mobile phone are supported, and the remote transmission and automatic storage of data are realized;
7. the built-in micro printing module is flexibly connected with an external printer, and the test result data is printed quickly.
Drawings
FIG. 1 is a circuit diagram of the system of the present invention.
FIG. 2 is a flow chart of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.
Example 1: referring to fig. 1-2, a fast one-key testing system for insulation performance includes a channel switching module, a discharge control module, a measurement discharge switching module, a high voltage excitation module and an acquisition input module, wherein the channel switching module includes A, B, C, N, G five channel switching circuits, a channel switching circuit a includes a relay K2 and a relay K3, a channel switching circuit B includes a relay K4 and a relay K5, a channel switching circuit B includes a relay K7 and a relay K9, a channel switching circuit B includes a relay K11 and a relay K13, a channel switching circuit B includes a relay K14 and a relay K15, a discharge control module includes a relay K6, a relay K8, a relay K10 and a relay K12, a discharge control module includes a relay K16, a resistor R48, a resistor R86, a resistor R87 and a resistor R88, the acquisition input module includes a comparator U5, one end of a relay K2 is connected with an A channel interface P2 and a relay K3, the other end of the relay K2 is connected with a relay K4, a relay K7, a relay K9, a relay K11, a relay K6 and a relay K8, the other end of the relay K3 is connected with an A channel interface P2, the other end of the relay K3 is connected with a relay K5, a relay K9, a relay K13, a relay K15, a relay K10 and a relay K12, the other end of the relay K4 is connected with a B channel interface P5 and the other end of a relay K5, the other end of the relay K7 is connected with the other ends of a C channel interface P10 and a relay K9, the other end of the relay K11 is connected with an N channel interface P14 and the other end of the relay K13, the other end of the relay K13 is connected with a G channel interface P13 and the other end of the relay K13, the other end of the relay K13 is connected with a resistor R13, the other end of the resistor R86 is connected with a resistor R87, the other end of the resistor R88 is connected with a resistor R48, the other end of the resistor R87 is connected with the other end of the resistor R48 and an E-channel interface P20, the other end of the relay K6 is connected with a high-voltage excitation module, the other end of the relay K10 is connected with the inverting input end of a comparator U5 through a resistor R40, a resistor R38 and a resistor R41 which are connected IN series, the non-inverting input end of the comparator U5 is grounded, and the output end of the comparator U5 is connected with a signal ERS _ ADC _ IN.
The invention also discloses a quick one-key test method of the insulation performance, which adopts the system to replace the external manual changeover test wire by the internal circuit switching, completes the discharging process in the internal circuit and replaces the external manual test discharging to realize the automatic routing function, and comprises the following steps:
step A, testing A-B, and displaying a test result, wherein the test result is 60 seconds;
b, discharging the small resistor for 5 seconds, judging whether the resistor is qualified or not, and returning to the previous step if the resistor is not qualified;
c, grounding for 5 seconds, judging whether the product is qualified or not, and if not, returning to the previous step;
step D, testing B-C, and displaying the test result, wherein the test result is 60 seconds;
e, discharging the small resistor for 5 seconds, judging whether the resistor is qualified or not, and returning to the previous step if the resistor is not qualified;
f, grounding for 5 seconds, judging whether the product is qualified or not, and if not, returning to the previous step;
g, testing B-C, and displaying a test result, wherein the test result is 60 seconds;
h, discharging the small resistor for 5 seconds, judging whether the resistor is qualified or not, and returning to the previous step if the resistor is not qualified;
and step I, discharging for 5 seconds in a grounding mode, judging whether the test is qualified, if not, returning to the previous step, and if so, ending the test.
Taking an overhead line three-phase three-wire (A, B, C) insulation performance test as an example, when the insulation performance between A and B is measured, relays K2 and K5 are in an on state, relays K3, K4, K6, K7, K8, K9, K11, K12, K13, K14, K15 and K16 are in an off state, and a loop A-B to be measured is switched on; then relay K6 is closed, high-voltage excitation voltage is output, relay K10 is closed, leakage current input information is collected and output to a device main control unit for intelligent insulation performance calculation, after the test is completed, relay K6 and relay K10 are disconnected, relays K8 and K12 are closed, other switches are kept in an open state, the discharge process is started, after small-resistor grounding discharge, relay K16 is closed, direct grounding discharge is started, and after the discharge is completed, the next channel insulation performance test stage is automatically started: measuring insulation resistance between B and C, wherein relays K4 and K9 are in an on state, a loop B-C to be tested is connected, relays K2, K3, K5, K6, K7, K8, K10, K11, K12, K13, K14, K15 and K16 are in an off state, then a relay K6 is closed, high-voltage excitation voltage is output, a relay K10 is closed, leakage current input information is collected and output to a device main control unit for intelligent insulation performance calculation, after the test is finished, relays K6 and K10 are opened, relays K8 and K12 are closed, other switches are kept in an off state, a discharging process is started, after small-resistor grounding discharge is carried out, a relay K16 is closed, direct grounding discharge is carried out, and after the discharge is finished, the next channel insulation performance test stage is automatically started: measuring insulation resistance between A and C, wherein relays K and K are in an on state, a loop A-C to be tested is connected, the relays K, K and K are in an off state, then the relay K is closed, high-voltage excitation voltage is output, the relay K is closed, leakage current input information is collected and output to a main control unit of the device to perform intelligent insulation performance calculation, after the test is completed, the relays K and K are disconnected, the relays K and K are closed, other switches are kept in an off state, a discharging process is started, after small-resistance grounding discharge, the relay K is closed, direct grounding discharge is performed, at the moment, insulation performance test of all channels is completed, and the relays K, K and K are all disconnected.
In embodiment 2, based on embodiment 1, as shown in fig. 1, the model of the RELAY K2 is HV-RELAY, and the models of the other RELAYs are the same. Two ends of the relay K2 are connected in parallel with a voltage stabilizing diode D3 for protection, and the models of the rest relays are the same.
Embodiment 3, on the basis of embodiment 1, can also connect the tester through long-range bluetooth or WIFI, realize having the remote control test of dual isolation.
Embodiment 4, on the basis of embodiment 1, the storage method for the test result is designed, that is, the device is automatically stored locally and the remote terminal is automatically stored, so that data migration and use are facilitated, and meanwhile, the built-in micro printing module is flexibly connected with an external printer, so that the test result data is rapidly printed.
This design is through setting up 7 wiring ports altogether at the wiring play: A. b, C, N, G, E, and can be flexibly configured for use. When the insulation performance of the electrical equipment is tested, the test interface is selected as required, the wiring work of all channels to be tested is completed at one time, the test of the insulation performance of the equipment test can be completed automatically in a closed loop mode only by pressing a one-key test button or remotely controlling the equipment through a remote intelligent terminal, the test result is locally and automatically stored and recorded, and the synchronous recording of the intelligent terminal is also supported. In the test process, each time a test is finished, the discharge is automatically carried out once. And the whole testing process is 'once wiring-one-key testing-result recording-discharging'. The realized functions comprise: 1. and (3) testing the insulating property: the interphase and line insulation performance is quickly tested by a one-key closed loop; 2. data management: retrieval, viewing and deletion of historical data; 3. data playback: the data in the test process is repeatedly checked, and the data is recorded every 10 seconds in the test process; 4. data dump: and printing or transmitting the data to a remote intelligent terminal through a local printer for export.
1) The built-in discharge circuit can automatically discharge after the insulation performance of each loop is measured, so that the test precision is improved, and the risk of manual discharge wiring operation is avoided.
2) The switching of the tested loops is automatically completed through the internal circuit, the insulation performance of all the loops is tested step by step, the testing efficiency is improved, and the risk of repeated wire disconnecting operation and the risk of wire connecting errors are avoided.
3) The function of remote measurement is realized, physical isolation is added on the basis of electrical isolation, and the safety of personnel and equipment is ensured.
4) And a storage medium is added, so that automatic local storage and remote storage of data are realized, and an analysis and tracing system is conveniently established.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (7)
1. The utility model provides a quick one key test system of insulating properties, includes that the passageway switches module, discharges the control module, measures and discharge switching module, high-pressure excitation module and collection input module, its characterized in that: the channel switching module comprises five channel switching circuits A, B, C, N, G, the channel switching circuit A comprises a relay K A, B, C, N, G and a relay K A, B, C, N, G, the channel switching circuit B comprises a relay K A, B, C, N, G and a relay K A, B, C, N, G, the discharge control module comprises a relay K A, B, C, N, G, a relay K A, B, C, N, G and a relay K A, B, C, N, G, the discharge control module comprises a relay K A, B, C, N, G, a resistor R A, B, C, N, G and a resistor R A, B, C, N, G, the acquisition input module comprises a comparator U A, B, C, N, G, one end of the relay K A, B, C, N, G is connected with the channel interface P A, B, C, N, G and the relay K A, B, C, N, G, the other end of the relay K A, B, C, N, G is connected with the relay K A, B, C, N, G, the other end of the relay K A, B, C, N, G is connected with the channel interface P A, B, C, N, G, the other end of the relay K3 is connected with a relay K5, a relay K9, a relay K13, a relay K15, a relay K10 and a relay K12, the other end of the relay K4 is connected with the other ends of a B channel interface P5 and a relay K5, the other end of the relay K7 is connected with a C channel interface P10 and the other end of a relay K9, the other end of the relay K11 is connected with the other ends of an N channel interface P14 and a relay K13, the other end of the relay K14 is connected with a G channel interface P15 and the other end of the relay K15, the other end of the relay K8 is connected with the other end of a relay K12, the other end of the relay K16, a resistor R86 and a resistor R88, the other end of the resistor R86 is connected with a resistor R87, the other end of a resistor R88 is connected with a resistor R48, the other end of the resistor R87 is connected with the other end of a resistor R48 and an E channel interface P20, the other end of the relay K6 is connected with a high-voltage excitation module, and the other end of the relay K6 is connected in series with a resistor R6, The rear ends of the resistor R38 and the resistor R41 are connected with the inverting input end of the comparator U5, the non-inverting input end of the comparator U5 is grounded, and the output end of the comparator U5 is connected with a signal ERS _ ADC _ IN.
2. The insulation performance quick one-touch test system according to claim 1, wherein the RELAY K2 is of the HV-RELAY type, and the remaining RELAYs are of the same type.
3. The insulation performance quick one-key test system according to claim 1, wherein a voltage stabilizing diode D3 for protection is connected in parallel with two ends of the relay K2, and the connection of the rest relays is the same.
4. A quick one-key test method for insulation performance is characterized in that a system of any one of claims 1 to 3 is adopted, an external manual changeover test wire is replaced by internal circuit switching, a discharging process is completed in an internal circuit, discharging is replaced by external manual test discharging, and an automatic routing function is realized, and the method comprises the following steps:
step A, testing A-B, and displaying a test result;
b, discharging the small resistor for 5 seconds, judging whether the resistor is qualified or not, and returning to the previous step if the resistor is not qualified;
c, grounding for 5 seconds, judging whether the product is qualified or not, and if not, returning to the previous step;
step D, testing B-C, and displaying the test result;
e, discharging the small resistor for 5 seconds, judging whether the resistor is qualified or not, and returning to the previous step if the resistor is not qualified;
f, grounding for 5 seconds, judging whether the product is qualified or not, and if not, returning to the previous step;
g, testing B-C, and displaying the test result;
h, discharging the small resistor for 5 seconds, judging whether the resistor is qualified or not, and returning to the previous step if the resistor is not qualified;
and step I, discharging for 5 seconds in a grounding mode, judging whether the test is qualified, if not, returning to the previous step, and if so, ending the test.
5. The insulation performance quick one-touch test method according to claim 4, wherein the test result of the step A is 60 seconds.
6. The insulation performance quick one-touch test method according to claim 4, wherein the test result of the step D is 60 seconds.
7. The insulation performance quick one-touch test method according to claim 4, wherein the test result of the step G is 60 seconds.
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| CN202111321790.XA CN114002567A (en) | 2021-11-09 | 2021-11-09 | Rapid one-key test system and method for insulation performance |
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