CN211785631U - Auxiliary wiring device for transformer test - Google Patents
Auxiliary wiring device for transformer test Download PDFInfo
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- CN211785631U CN211785631U CN201921737296.XU CN201921737296U CN211785631U CN 211785631 U CN211785631 U CN 211785631U CN 201921737296 U CN201921737296 U CN 201921737296U CN 211785631 U CN211785631 U CN 211785631U
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Abstract
The utility model discloses an experimental supplementary termination of transformer, by mains operated, the device openly is equipped with the display screen, and the device back is equipped with the wiring panel, is equipped with a plurality of wiring interface on the wiring panel, and the wiring interface is connected with switching circuit, and switching circuit still is connected with central controller, and central controller still is connected with the display screen. The transformer test auxiliary wiring device can assist the test wiring connection between an instrument and a transformer, all wiring changes can be realized through the wiring device, and the wiring change can be controlled within 5s when in use, so that the convenience and the rapidness are realized.
Description
Technical Field
The utility model relates to a transformer capability test technique especially indicates an experimental supplementary termination of transformer.
Background
Along with the continuous improvement of the requirement on the operation reliability of the system, the power failure maintenance time of the substation is shorter and shorter, while the transformer wastes time and labor in the test work of all primary equipment of the substation, the investigation and research show that the characteristic test time accounts for 69.33% of the whole test time, the wiring step in the characteristic test link is longest in time, and the occupation ratio reaches 71%. Therefore, in recent years, companies put a lot of efforts on research and development of new technologies in order to improve the efficiency of overhaul tests. Technical personnel improve detection means and methods of the transformer in many times, but the problem of working fatigue caused by frequent ascending and descending of the main transformer due to change of test wiring of the personnel still cannot be effectively solved, particularly the problem of sunstroke of the personnel frequently occurs during outdoor high-temperature operation, the high falling risk of field operation is greatly improved, and safety control of the field operation is not facilitated. The invention discloses an automatic transformer detection system and an automatic transformer detection method thereof in the invention patent of Chinese patent publication No. CN109115477A, published 2019, 1 month and 1 day, and named as 'an automatic transformer detection system and an automatic transformer detection method thereof', wherein the automatic transformer detection system comprises a bottom plate, walking wheels, a position adjusting device and a notch detection device, the walking wheels are mounted at the lower end of the bottom plate, the position adjusting device is mounted on the bottom plate, the notch detection device is mounted on the position adjusting device, the position adjusting device comprises a linear guide rail, an electric sliding plate, a lifting plate, a mounting frame, a bump, a bearing bracket, a pushing cylinder, a sliding frame and a guide frame, and the notch detection device comprises a mounting plate, an adjusting mechanism, a driving mechanism and a detection mechanism. The relay detection method has the disadvantages that the detection of the relay is only convenient, and a method for improving the detection efficiency and the safety of the relay is not provided.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the shortcoming among the prior art, providing an experimental supplementary termination of transformer.
The utility model aims at realizing through the following technical scheme:
the utility model provides a transformer test auxiliary connection device, is supplied power by the power, and the device openly is equipped with the display screen, and the device back is equipped with wiring panel, is equipped with a plurality of wiring interface on the wiring panel, and the wiring interface is connected with switching circuit, and switching circuit still is connected with central controller, and central controller still is connected with the display screen. The power supply can adopt an external 220V power supply or an internal 24V battery. The wiring panel divides wiring areas in detail, and is connected with the transformer casing head and the test instrument according to the description of each wiring area of the panel, so that the test wiring work can be completed, and the wiring process is convenient and fast.
Taking a direct current resistance test as an example, in a traditional test mode, when a direct current resistance test on a medium-voltage side is carried out after the direct current resistance test on a high-voltage side is completed, a tester needs to climb a main transformer to remove a test wiring on the high-voltage side, then the test wiring is replaced to the medium-voltage side, and the process takes at least 20 min. After the tester is utilized, the original high-voltage side direct current resistance test mode only needs to be quitted on the liquid crystal screen, the medium-voltage side direct current resistance test mode is further selected, the change of test wiring is realized by instrument control, the process is simple and rapid, the wiring can be controlled within 5s during the wiring changing, and the efficiency is greatly improved.
As a preferred scheme, the transformer test auxiliary wiring device further comprises a power management module, and the power management module is connected with a power supply, each chip and each component.
As a preferred scheme, the power management module comprises a voltage stabilizing chip, and the model of the voltage stabilizing chip is LM 2576S-5.
As a preferred scheme, switching circuit include relay and relay drive circuit, the relay is connected with relay drive circuit, relay drive circuit is connected with central controller, the relay includes high-voltage relay, middling pressure relay, low-voltage relay, middling pressure short-circuit relay, low pressure short-circuit relay and earthing relay, interconnect between high-voltage relay, middling pressure relay and the low-voltage relay, interconnect between middling pressure relay and the middling pressure short-circuit relay, interconnect between low-voltage relay and the low pressure short-circuit relay, earthing relay is connected with middling pressure short-circuit relay and low pressure short-circuit relay simultaneously. After the relay driving circuit receives the execution instruction, the functions of short circuit, grounding, suspension and the like among three phases of the transformer are realized through attraction.
Preferably, the relay is in a model of JQX 30F.
As a preferred scheme, the transformer test auxiliary wiring device further comprises a current acquisition circuit, the current acquisition circuit is connected with the switching circuit, and the current acquisition circuit is further connected with the central controller through an AD conversion circuit. The current display is not displayed in the test process of a part of test instruments, and a current monitoring function is additionally designed for monitoring the stable condition of a circuit in the whole test process. Considering that the circuit does not account for final test data processing, the designed acquisition precision is not required to be very high, the current detection precision designed by the device is 1%, the detection current range is 500mA-50A, the device has the AC/DC detection capability, and the current analog quantity is digitized and finally displayed on a screen through a current detection sensor HBC-LSP element and an AD7705 conversion chip.
As a preferred scheme, the current acquisition circuit comprises a current detection sensor, the type of which is HBC-LSP; the AD conversion circuit comprises an AD conversion chip, and the model number of the AD conversion chip is AD 7705.
As a preferred scheme, the auxiliary wiring device for the transformer test further comprises a USB interface, and the USB interface is connected with the central controller through a USB interface circuit. The USB debugging interface is arranged, so that the reading and writing of the built-in chip can be realized through the USB debugging interface in the later period, and the function expansion of other various wiring modes is facilitated.
The beneficial effects of the utility model are that, the experimental wiring connection between transformer test auxiliary connection device ability auxiliary instrument and transformer is connected, can realize all wiring changes through this termination, can control within 5s when the line change is used, convenient and fast.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention;
fig. 2 is a circuit diagram of a switching circuit portion of the present invention;
fig. 3 is a circuit diagram of the current collecting circuit part of the present invention.
Wherein: 1. the device comprises a central controller, 2, a display screen, 3, a switching circuit, 4, an AD conversion circuit, 5, a current acquisition circuit, 6 and a USB interface circuit.
Detailed Description
The invention is further described below with reference to the drawings and examples.
Example (b): the utility model provides a transformer test auxiliary connection device, is by power supply, as shown in figure 1, and the device openly is equipped with display screen 2, and the device back is equipped with wiring panel, is equipped with a plurality of wiring interface on the wiring panel, and the wiring interface is connected with switching circuit 3, and switching circuit still is connected with central controller 1, and central controller still is connected with the display screen. The transformer test auxiliary wiring device further comprises a power supply management module, and the power supply management module is connected with a power supply, each chip and each component. The power management module comprises a voltage stabilizing chip, and the model of the voltage stabilizing chip is LM 2576S-5. The transformer test auxiliary wiring device also comprises a USB interface, and the USB interface is connected with the central controller through a USB interface circuit 6. The USB debugging interface is arranged, so that the reading and writing of the built-in chip can be realized through the USB debugging interface in the later period, and the function expansion of other various wiring modes is facilitated. The transformer test auxiliary wiring device further comprises a current collecting circuit 5, the current collecting circuit is connected with the switching circuit, and the current collecting circuit is further connected with the central controller through an AD conversion circuit 4.
Taking a direct current resistance test as an example, in a traditional test mode, when a direct current resistance test on a medium-voltage side is carried out after the direct current resistance test on a high-voltage side is completed, a tester needs to climb a main transformer to remove a test wiring on the high-voltage side, then the test wiring is replaced to the medium-voltage side, and the process takes at least 20 min. After the tester is utilized, the original high-voltage side direct current resistance test mode only needs to be quitted on the liquid crystal screen, the medium-voltage side direct current resistance test mode is further selected, the change of test wiring is realized by instrument control, the process is simple and rapid, the wiring can be controlled within 5s during the wiring changing, and the efficiency is greatly improved.
The switching circuit include relay and relay drive circuit, relay and relay drive circuit are connected, relay drive circuit is connected with central controller, the relay includes high-voltage relay, the middling pressure relay, low-voltage relay, middling pressure short-circuit relay, low pressure short-circuit relay and ground connection relay, high-voltage relay, interconnect between middling pressure relay and the low-voltage relay, interconnect between middling pressure relay and the middling pressure short-circuit relay, interconnect between low-voltage relay and the low pressure short-circuit relay, ground connection relay is connected with middling pressure short-circuit relay and low pressure short-circuit relay simultaneously. As shown in fig. 2, 16 relays are included, the model number of the relays is JQX30F, and the relays include 4 high-voltage relays, 4 medium-voltage relays, 4 low-voltage relays, 2 medium-voltage short-circuit relays and 2 low-voltage short-circuit relays. Thus, 7 kinds of switching circuits are realized, specifically as follows:
1. testing a direct current resistance at a high-voltage side;
2. testing a direct current resistance at a medium-voltage side;
3. testing a direct current resistance at a low-voltage side;
4. testing the time waveform of the on-load switch;
5. high-medium short circuit impedance test;
6. high-low short circuit impedance test:
7. medium-low short circuit impedance test.
FIG. 3 is a detailed circuit diagram of a current acquisition circuit including a current sense sensor of the HBC-LSP type; the AD conversion circuit comprises an AD conversion chip, and the model number of the AD conversion chip is AD 7705.
The current display is not displayed in the test process of a part of test instruments, and a current monitoring function is additionally designed for monitoring the stable condition of a circuit in the whole test process. Considering that the circuit does not account for final test data processing, the designed acquisition precision is not required to be very high, the current detection precision designed by the device is 1%, the detection current range is 500mA-50A, the device has the AC/DC detection capability, and the current analog quantity is digitized and finally displayed on a screen through a current detection sensor HBC-LSP element and an AD7705 conversion chip.
Claims (8)
1. The utility model provides a transformer test auxiliary connection device, by power supply, characterized by, the device openly is equipped with the display screen, and the device back is equipped with wiring panel, is equipped with a plurality of wiring interface on the wiring panel, and the wiring interface is connected with switching circuit, and switching circuit still is connected with central controller, and central controller still is connected with the display screen.
2. The auxiliary wiring device for the transformer test as claimed in claim 1, further comprising a power management module, wherein the power management module is connected with a power supply and each chip and component.
3. The auxiliary wiring device for the transformer test as claimed in claim 2, wherein the power management module comprises a voltage stabilizing chip, and the model of the voltage stabilizing chip is LM 2576S-5.
4. The auxiliary wiring device for the transformer test as claimed in claim 1 or 2, wherein the switching circuit comprises a relay and a relay driving circuit, the relay is connected with the relay driving circuit, the relay driving circuit is connected with the central controller, the relay comprises a high-voltage relay, a medium-voltage relay, a low-voltage relay, a medium-voltage short-circuit relay, a low-voltage short-circuit relay and a grounding relay, the high-voltage relay, the medium-voltage relay and the low-voltage relay are connected with each other, the medium-voltage relay and the medium-voltage short-circuit relay are connected with each other, the low-voltage relay and the low-voltage short-circuit relay are connected with each other, and the grounding relay is connected with the medium-.
5. The auxiliary wiring device for the transformer test as claimed in claim 4, wherein the relay is JQX 30F.
6. The auxiliary wiring device for the transformer test as claimed in claim 1, further comprising a current collection circuit, wherein the current collection circuit is connected with the switching circuit, and the current collection circuit is further connected with the central controller through an AD conversion circuit.
7. The auxiliary wiring device for the transformer test as claimed in claim 6, wherein the current collection circuit comprises a current detection sensor of type HBC-LSP; the AD conversion circuit comprises an AD conversion chip, and the model number of the AD conversion chip is AD 7705.
8. The auxiliary wiring device for the transformer test as claimed in claim 1, further comprising a USB interface, wherein the USB interface is connected to the central controller via a USB interface circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921737296.XU CN211785631U (en) | 2019-10-16 | 2019-10-16 | Auxiliary wiring device for transformer test |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921737296.XU CN211785631U (en) | 2019-10-16 | 2019-10-16 | Auxiliary wiring device for transformer test |
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| Publication Number | Publication Date |
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| CN211785631U true CN211785631U (en) | 2020-10-27 |
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| CN201921737296.XU Active CN211785631U (en) | 2019-10-16 | 2019-10-16 | Auxiliary wiring device for transformer test |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110927411A (en) * | 2019-10-16 | 2020-03-27 | 国网浙江省电力有限公司金华供电公司 | Auxiliary wiring device for transformer test |
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- 2019-10-16 CN CN201921737296.XU patent/CN211785631U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110927411A (en) * | 2019-10-16 | 2020-03-27 | 国网浙江省电力有限公司金华供电公司 | Auxiliary wiring device for transformer test |
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