CN217010354U - Secondary voltage parallel connection device - Google Patents
Secondary voltage parallel connection device Download PDFInfo
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- CN217010354U CN217010354U CN202220387816.4U CN202220387816U CN217010354U CN 217010354 U CN217010354 U CN 217010354U CN 202220387816 U CN202220387816 U CN 202220387816U CN 217010354 U CN217010354 U CN 217010354U
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- 238000000605 extraction Methods 0.000 claims description 11
- 238000001514 detection method Methods 0.000 claims description 10
- 238000012360 testing method Methods 0.000 claims description 4
- 230000006872 improvement Effects 0.000 abstract description 7
- 238000000034 method Methods 0.000 description 11
- 230000008569 process Effects 0.000 description 6
- 238000012986 modification Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000000819 phase cycle Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The utility model relates to the technical field of auxiliary equipment for replacing components of a transformer substation, in particular to a secondary voltage parallel connection device; the system comprises a nuclear phase loop and a voltage parallel loop, wherein the nuclear phase loop is respectively connected with three-phase power in parallel, and the voltage parallel loop is respectively connected with the nuclear phase loop in parallel and used for short-circuiting the technical improved screen; a first indicator V1 for collecting voltage signals is arranged on the nuclear phase loops, and the three nuclear phase loops are grounded through a nuclear phase grounding loop; the voltage parallel connection loop is provided with a parallel connection linkage switch for synchronously switching on and off the three voltage parallel connection loops; the nuclear phase circuit and the nuclear phase grounding circuit are provided with nuclear phase linked switches for synchronously switching on and off the nuclear phase circuit and the nuclear phase grounding circuit, the voltage difference on two sides of the technical improvement screen is checked to be different by arranging the voltage parallel connection circuit and the nuclear phase circuit, and the voltage parallel connection is realized by the parallel connection circuit after the nuclear phase is correct.
Description
Technical Field
The utility model relates to the technical field of auxiliary equipment for replacing components of a transformer substation, in particular to a secondary voltage parallel connection device.
Background
At present, components of a plurality of old transformer substations reach the operation age and need to be replaced successively; for example, the protection screen is replaced, and the problem of secondary voltage connection exists between the protection screen to be replaced (technically improved screen for short) and other protection screens in operation; the replacement of the technically improved screen can cause the voltage of the running screen to be lost, so that the running screen cannot run normally; in the prior art, the voltage of the operating device is temporarily switched from the voltage extraction panel, and the voltage is restored after the new protection panel is replaced.
In order to prevent short circuit caused by wrong phase sequence in work or mistaken collision of workers when a wire core is suspended, two ends are matched by a plurality of persons, the phase is checked for many times, and the voltage is measured, and the specific parallel connection process and the required time of the traditional method are about 35 minutes approximately; the parallel connection process is complicated, and time and labor are wasted; based on this technical background, the inventor designs a secondary voltage shunting device to reduce the operation process and save the time for shunting the voltage.
Disclosure of Invention
In order to solve the technical problems of complexity, time and labor consumption in the splicing process and the like in the replacement of a technically improved screen in the prior art, the utility model provides a secondary voltage splicing device which checks the voltage difference at two sides of the technically improved screen by arranging a voltage splicing loop and a phase checking loop and realizes the voltage splicing through the splicing circuit after the phase checking is correct.
The technical scheme adopted by the utility model is as follows: a secondary voltage parallel connection device is characterized in that: the system comprises a nuclear phase loop and a voltage parallel loop, wherein the nuclear phase loop is respectively connected with three-phase power in parallel, and the voltage parallel loop is respectively connected with the nuclear phase loop in parallel and used for short-circuiting the technical improved screen; a first indicator V1 for collecting voltage signals is arranged on the nuclear phase loops, and the three nuclear phase loops are grounded through a nuclear phase grounding loop; the voltage parallel connection loop is provided with a parallel connection linkage switch for synchronously switching on and off the three voltage parallel connection loops; and a nuclear phase linkage switch for synchronously switching on and off the nuclear phase loop and the nuclear phase grounding loop is arranged on the nuclear phase loop and the nuclear phase grounding loop.
In order to detect whether the voltage extraction screen side and the operation screen side of the device are connected in a virtual mode or not, the improvement of the utility model is that the voltage parallel connection loop is connected in the parallel connection grounding loop through the detection loop and is connected in the ground wire through the parallel connection grounding loop, and meanwhile, a second indicator V2 corresponding to the voltage parallel connection loop is arranged on the detection loop; the reset button controls six groups of normally open contacts, three groups of normally open contacts are connected in series with the detection loop, and the other three groups of normally open contacts are connected in parallel with the nuclear phase linked switch.
In order to make the device have the function of integral on-off, the improvement of the utility model is that the nuclear phase loop is respectively provided with an air switch QF for controlling the integral on-off.
Furthermore, the parallel-connection linkage switch and the nuclear phase linkage switch respectively adopt an independent linkage switch, and the parallel-connection linkage switch is provided with three groups of contact points; the nuclear phase linked switch is six groups of contacts.
Optionally, the parallel connection linkage switch and the nuclear phase linkage switch integrally adopt a change-over switch, and the change-over switch has three gears and nine groups of contacts.
Furthermore, two sides of the nuclear phase loop are connected with a cable on the voltage extraction screen side or the operation screen side through a test hook needle.
The utility model achieves the following beneficial effects: the nuclear phase circuit which is respectively connected with the three-phase power in parallel and the voltage parallel circuit which is respectively connected with the nuclear phase circuit in parallel and is used for short-circuit technical improvement of the screen are arranged; respectively connecting voltage cables on a voltage extraction screen side and a running screen side to two sides of a nuclear phase loop; closing the nuclear phase linkage switch, and conducting the nuclear phase loop and the nuclear phase grounding loop; simultaneously carrying out phase checking on A, B, C, wherein if three first indicators V1 on a phase checking loop are respectively 0V, the access is correct; at the moment, the nuclear linkage switch is disconnected, the parallel linkage switch is closed, the voltage parallel loop is conducted, and the technical modification screen to be replaced is short-circuited, so that the technical modification screen can be replaced; the replacement of a technically improved screen is simplified, repetitive work is performed in parallel connection, a complex mode is improved, parallel connection time can be greatly saved, and the operation is safer and more reliable.
Drawings
Fig. 1 is a schematic diagram of a replacement of a prior art reforming screen.
Fig. 2 is a schematic diagram of a conventional secondary voltage shunting process.
FIG. 3 is a schematic diagram of a nuclear phase loop and a voltage shunt loop according to the present invention.
FIG. 4 is a schematic diagram of the detection circuit and the ground connection circuit of the present invention.
Detailed Description
To facilitate an understanding of the present invention by those skilled in the art, specific embodiments thereof are described below with reference to the accompanying drawings.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two components can be directly connected or indirectly connected through an intermediate medium, and the two components can be communicated with each other; the specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
When the protection screen of an old transformer substation is replaced at present, the problem of secondary voltage connection exists between the protection screen (technically improved screen for short) to be replaced and other protection screens in operation; the replacement of the technically improved screen can cause the voltage of the running screen to be lost, so that the running screen cannot run normally; therefore, the conventional method is to temporarily transfer the voltage of the operating equipment from the voltage extraction screen, and then restore the voltage after the new protection screen is replaced; the specific voltage loop temporary connection relationship during technical improvement is shown in fig. 1; the voltages of the technical change screen need to be temporarily switched, meanwhile, in order to prevent short circuit caused by phase sequence error in work or mistaken collision of workers when a wire core is suspended, two ends need to be matched by a plurality of persons, the phase is checked for a plurality of times, the voltage is measured, and the time and the labor are wasted by adopting a traditional method for specifically connecting the two ends in parallel; as shown in fig. 2, the present invention provides a secondary voltage parallel connection device, which includes a nuclear phase loop respectively connected in parallel with a three-phase power, and a voltage parallel connection loop respectively connected in parallel with the nuclear phase loop and used for short-circuiting a technical improvement screen, and checks whether three nuclear phase loops are connected in pair by checking phase difference between two sides; a first indicator V1 for acquiring voltage signals is arranged on the nuclear phase loop (if the two sides of the first indicator V1 are connected with the same phase, namely an AA phase, a BB phase and a CC phase, the first indicator V1 is 0V; if the two sides of the first indicator V1 are respectively connected with different phases, namely an AB phase, an AC phase and a BC phase, the first indicator V1 is 100V), and whether the phase sequence is connected or not is judged through the indication number of the first indicator V1; the three nuclear phase loops are grounded through a nuclear phase grounding loop; the voltage parallel connection loop is provided with parallel connection linked switches (1-1, 1-2, 1-7, 1-8, 1-13 and 1-14 in the figure) for synchronously switching on and off the three voltage parallel connection loops; nuclear phase linked switches (1-3, 1-4, 1-9, 1-10, 1-15, 1-16, 1-5, 1-6, 1-11, 1-12, 1-17 and 1-18 in the figure) for synchronously switching on and off the nuclear phase loop and the nuclear phase grounding loop are respectively arranged on the nuclear phase loop and the nuclear phase grounding loop; when the voltage extraction circuit is used, voltage cables on the voltage extraction screen side and the operation screen side are respectively connected to two sides of the nuclear phase loop; closing the nuclear phase linked switch, and conducting the nuclear phase loop and the nuclear phase grounding loop; simultaneously carrying out phase checking on A, B, C, wherein if three first indicators V1 on a phase checking loop are respectively 0V, the access is correct; at the moment, the nuclear linkage switch is disconnected, the parallel linkage switch is closed, the voltage parallel loop is conducted, and the technical modification screen to be replaced is short-circuited, so that the technical modification screen can be replaced; the replacement of a technically improved screen is simplified, repeated work is performed in parallel connection, a complex mode is improved, parallel connection time can be greatly saved, and the operation is safer and more reliable.
During implementation, the risk of virtual connection exists when the device is connected to a voltage extraction screen side and a running screen side; the three voltage parallel loops are connected into the parallel grounding loop through the detection loop and are connected into the ground wire through the parallel grounding loop, and meanwhile, a second indicator V2 corresponding to the voltage parallel loop is arranged on the detection loop; a normally open type reset button (2-1 to 2-12 in the figure) is arranged in consideration of the connection and disconnection of the notification detection loop; the reset button controls six groups of normally open contacts, three groups of normally open contacts are connected in series with the detection loop, and the other three groups of normally open contacts are connected in parallel with the nuclear phase linkage switch; pressing a reset button, and grounding the ABC three phases on two sides through a first indicator V1 or a second indicator V2; the first indicator V1 or the second indicator V2 both display that the voltage is correct; representing no virtual concatenation; then the button is released to carry out the nuclear phase operation.
As shown in the figure, the three nuclear phase loops are respectively provided with an air switch QF for controlling the integral on-off of the device, and the air switch QF is used for controlling the integral on-off of the device; the nuclear phase loop is accessed by a test hook needle, cables on the voltage extraction screen side and the operation screen side are not allowed to have short-circuit accidents in the field voltage parallel connection process, and the operation device is not allowed to be operated by mistake due to voltage loss, so that extremely high requirements are provided for the firmness and safety of the test wire clamp; meanwhile, a first indicator V1 and a second indicator V2 are digital voltage display lamps; the real-time numerical value of the monitoring voltage can be visually displayed, and the design requirement of small and exquisite portability is met.
Example one
The parallel connection linkage switch and the nuclear phase linkage switch respectively adopt independent linkage switches to respectively control independent on-off, so that the advantage is that the two circuits are respectively and independently controlled; the parallel connection linkage switch is provided with three groups of contacts (1-1, 1-2, 1-7, 1-8, 1-13 and 1-14 in the figure); the nuclear phase linked switch has six groups of contacts (namely 1-3, 1-4, 1-9, 1-10, 1-15, 1-16, 1-5, 1-6, 1-11, 1-12, 1-17 and 1-18).
Example two
The parallel connection linkage switch and the nuclear phase linkage switch integrally adopt a change-over switch, the change-over switch has three gears and nine groups of contacts, and the contact resistance of the contacts is less than 0.1 ohm; all the contacts of the gear 0 are in the open positions, the gear 1 has three groups of contacts closed (namely 1-1, 1-2, 1-7, 1-8, 1-13 and 1-14 are closed, and the voltage parallel connection loop is conducted), and the gear 2 has six groups of contacts closed (namely 1-3, 1-4, 1-9, 1-10, 1-15, 1-16, 1-5, 1-6, 1-11, 1-12, 1-17 and 1-18 are closed, and the nuclear phase loop is conducted with the nuclear phase grounding loop).
The device is arranged in a portable voltage parallel connection box which adopts an insulating baffle.
The use method comprises the following steps: respectively connecting voltage cables on a voltage extraction screen side and a running screen side to two sides of a nuclear phase loop; firstly, the air switch QF is closed, the reset button is pressed, and the ABC three phases on two sides are grounded through the first indicator V1 or the second indicator V2; the first indicator V1 or the second indicator V2 both display that the voltage is correct; representing no virtual concatenation; then, the button is released to carry out phase checking operation; closing the nuclear phase linkage switch, and conducting the nuclear phase loop and the nuclear phase grounding loop; meanwhile, A, B, C is checked, if the first indicator V1 is 100V, the phase sequence of connection is changed; if the three first indicators V1 on the nuclear phase loop are respectively 0V, the access is correct; at the moment, the nuclear linkage switch is disconnected, the parallel-connection linkage switch is closed, the voltage parallel-connection loop is conducted, the technically improved screen to be replaced is in short circuit, and then the technically improved screen can be replaced; the replacement of a technically improved screen is simplified, repeated work is performed in parallel connection, a complex mode is improved, parallel connection time can be greatly saved, and the operation is safer and more reliable.
The above-mentioned fixing methods, if not separately described, all use the means of common technique of those skilled in the art, such as welding, nesting, or screw fixing.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above-described embodiments of the present invention do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (6)
1. A secondary voltage parallel connection device is characterized in that: the system comprises a nuclear phase loop and a voltage parallel loop, wherein the nuclear phase loop is respectively connected with three-phase power in parallel, and the voltage parallel loop is respectively connected with the nuclear phase loop in parallel and used for short-circuiting the technical improved screen; a first indicator V1 for collecting voltage signals is arranged on the nuclear phase loops, and the three nuclear phase loops are grounded through a nuclear phase grounding loop; the voltage parallel connection loop is provided with a parallel connection linkage switch for synchronously switching on and off the three voltage parallel connection loops; and a nuclear phase linkage switch for synchronously switching on and off the nuclear phase loop and the nuclear phase grounding loop is arranged on the nuclear phase loop and the nuclear phase grounding loop.
2. The secondary voltage shunting device of claim 1, wherein: the voltage parallel circuit is connected with the parallel grounding circuit through the detection circuit, is connected with the ground wire through the parallel grounding circuit, and is provided with a second indicator V2 corresponding to the voltage parallel circuit; the reset button controls six groups of normally open contacts, three groups of normally open contacts are connected in series with the detection loop, and the other three groups of normally open contacts are connected in parallel with the nuclear phase linked switch.
3. A secondary voltage shunting device according to claim 2, characterized in that: and the nuclear phase loops are respectively provided with an air switch QF for controlling the whole on-off.
4. The secondary voltage shunting device of claim 1, wherein: the parallel-connection linked switch and the nuclear phase linked switch respectively adopt an independent linked switch, and the parallel-connection linked switch is provided with three groups of contact points; the nuclear phase linked switch is six groups of contacts.
5. The secondary voltage shunting device of claim 1, wherein: the parallel connection linkage switch and the nuclear phase linkage switch integrally adopt a change-over switch, and the change-over switch is provided with three gears and nine groups of contacts.
6. The secondary voltage shunting device of claim 1, wherein: and the two sides of the nuclear phase loop are connected with a voltage extraction screen side or a cable line on the operation screen side through a test hook needle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220387816.4U CN217010354U (en) | 2022-02-25 | 2022-02-25 | Secondary voltage parallel connection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220387816.4U CN217010354U (en) | 2022-02-25 | 2022-02-25 | Secondary voltage parallel connection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217010354U true CN217010354U (en) | 2022-07-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220387816.4U Expired - Fee Related CN217010354U (en) | 2022-02-25 | 2022-02-25 | Secondary voltage parallel connection device |
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| Country | Link |
|---|---|
| CN (1) | CN217010354U (en) |
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- 2022-02-25 CN CN202220387816.4U patent/CN217010354U/en not_active Expired - Fee Related
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220719 |
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| CF01 | Termination of patent right due to non-payment of annual fee |