CN212625144U - Novel PT one-time resonance eliminator - Google Patents
Novel PT one-time resonance eliminator Download PDFInfo
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- CN212625144U CN212625144U CN202021147855.4U CN202021147855U CN212625144U CN 212625144 U CN212625144 U CN 212625144U CN 202021147855 U CN202021147855 U CN 202021147855U CN 212625144 U CN212625144 U CN 212625144U
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Abstract
The utility model relates to a novel PT harmonic elimination ware once, it includes harmonic elimination ware and harmonic elimination device once, harmonic elimination ware is established ties between PT primary winding neutral point and ground connection, harmonic elimination device connects in parallel in harmonic elimination ware once through the wire, the harmonic elimination device outside is provided with the control box, the control box is installed in secondary side cubical switchboard side, normally open switch K and coil P are provided with to the control box inside, coil P is through other circuit independent operation, normally open switch K can be closed or break through control coil P break-make electricity, thereby carry out the short circuit operation to harmonic elimination ware once, PT short-term power failure when can avoiding measuring distribution network system electric capacity electric current, simplify electric capacity electric current test process, avoid personnel to stop for a long time in high-voltage equipment area, reduce the human cost, and low in production cost can promote the nature stronger; the utility model has the characteristics of reduce equipment operation, reduce the cost of labor, improve work efficiency.
Description
Technical Field
The utility model belongs to the technical field of voltage transformer, concretely relates to novel PT once harmonic elimination ware.
Background
Ferromagnetic resonance is a phenomenon of persistent and high-amplitude resonant overvoltage caused by no-load or less outgoing lines of a bus, due to closing charging or ground fault elimination in operation, and the like, wherein the overvoltage caused by ferromagnetic resonance not only affects the insulation performance of primary side equipment of a system, but also easily causes frequent fusing of a primary fuse in a partial transformer substation PT (voltage transformer), and can cause burning of the PT in severe cases to cause power accidents, in order to avoid accidents, a primary resonance eliminator is generally required to be additionally arranged at a primary side neutral point of the PT, the primary resonance eliminator has the functions of damping and current limiting and can play a good role in limiting PT ferromagnetic resonance, a PT connection mode commonly used for 10kV and 35kV distribution network systems is 3PT connection, when the capacitance current of the distribution network system is measured, in order to ensure the measurement accuracy, the primary resonance eliminator needs to be short-connected, namely the PT in operation needs to be stopped, put into operation with PT again after the harmonic elimination device is once cut short circuit, this operation needs carry out the short-time power failure with PT, influences electric power system normal operating, increases equipment operation, extension test time.
Disclosure of Invention
An object of the utility model is to provide a novel PT harmonic elimination ware once for solve the problem that PT power failure in short time among the electric capacity current test process.
The purpose of the utility model is realized like this: a novel PT primary harmonic elimination device comprises a primary harmonic elimination device and a harmonic elimination device, wherein the primary harmonic elimination device is connected in series between a PT primary winding neutral wire and a grounding wire, the harmonic elimination device is connected in parallel with the primary harmonic elimination device through a wire, a control box is arranged on the outer side of the harmonic elimination device, a bottom plate is arranged at the bottom of the inner side of the control box, a normally open switch K is arranged in the middle of the wire inside the control box, a spring A is arranged on the upper side of the middle of the normally open switch K, a first fixing plate is arranged at the upper end of the spring A, an upper insulating rod is arranged on the lower side of the normally open switch K, a spring B is arranged on the left side of the middle of the upper insulating rod, a second fixing plate is arranged at the left end of the spring B, a rotating shaft is arranged at the lower end of the upper insulating rod, a lower insulating rod is arranged on, the armature iron is characterized in that a support frame is arranged on the lower side of the armature iron, a coil P is arranged on the outer side of the support frame, and the coil P is controlled by a coil switch.
The PT primary winding is formed by connecting PT1, PT2 and PT3 in parallel.
The left side of the upper insulating rod is provided with a stop block A, and the lower side of the lower insulating rod is provided with a stop block B.
The first fixing plate, the second fixing plate and the rotating shaft are all fixedly arranged on the bottom plate.
The upper insulating rod and the lower insulating rod are fixedly connected with the rotating shaft.
The coil P is controlled by other independent circuits.
The control box is arranged on the side surface of the secondary side switch cabinet.
The upper insulating rod and the lower insulating rod are made of glass fiber reinforced plastic epoxy resin.
The models of the primary harmonic elimination device are LXQ-6KV, LXQ-10KV and LXQ-35 KV.
The utility model has the advantages that: when the utility model is used, the primary resonance eliminator is connected in series between a PT primary winding neutral wire and a grounding wire, when a system is in normal operation, the primary resonance eliminator is in normal use, when a system capacitance current test is needed, a tester closes a coil switch at a secondary side switch cabinet, after a coil P is electrified, electromagnetic suction is generated to attract an armature to move downwards, the armature drives a lower insulating rod to rotate around a rotating shaft, an upper insulating rod rotates along the rotating shaft, a normally open switch K is pushed to be closed at the upper end of the upper insulating rod, the primary resonance eliminator is in a short circuit state at the moment, the work to be tested is finished, the tester disconnects the coil switch at the secondary side of the switch cabinet, the coil P electromagnetic suction disappears, a spring B pulls the upper insulating rod to reset, a spring A pushes the normally open switch K to be disconnected, the primary resonance eliminator is put into operation again, the utility model has the advantages, the working efficiency is improved.
Drawings
Fig. 1 is the utility model relates to a novel 3PT circuit wiring schematic diagram of PT primary resonance eliminator.
Fig. 2 is a schematic diagram of the structure of the harmonic elimination device of the PT primary harmonic eliminator of the present invention, which is not started.
Fig. 3 is a schematic view of the start structure of the resonance elimination device of the novel PT primary resonance eliminator of the present invention.
In the figure: 1. the resonance elimination device comprises a resonance elimination device 2, a primary resonance elimination device 3, a normally open switch K4, a coil P5, a lead 6, an armature 7, a rotating shaft 8, a spring A9, a spring B10, an upper insulating rod 11, a lower insulating rod 12, a control box 13, a coil switch 14, a first fixing plate 15, a second fixing plate 16, a stop A17, a stop B18, a bottom plate 19, a support frame 20, a grounding wire 21 and a neutral wire.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
Example 1
As shown in fig. 1-3, a novel PT primary resonance eliminator comprises a primary resonance eliminator 2 and a resonance eliminator 1, wherein the primary resonance eliminator 2 is connected in series between a PT primary winding neutral wire 21 and a ground wire 20, the resonance eliminator 1 is connected in parallel to the primary resonance eliminator 2 through a lead 5, a control box 12 is arranged outside the resonance eliminator 1, a bottom plate 18 is arranged at the bottom of the inner side of the control box 12, a normally open switch K3 is arranged in the middle of the lead 5 inside the control box 12, a spring a8 is arranged on the upper side of the middle of the normally open switch K3, a first fixing plate 14 is arranged at the upper end of the spring a8, an upper insulating rod 10 is arranged on the lower side of the normally open switch K3, a spring B9 is arranged on the left side of the middle of the upper insulating rod 10, a second fixing plate 15 is arranged at the left end of the spring B9, a rotating shaft 7 is arranged at the lower end of the upper insulating, the right side of the rotating shaft 7 is provided with a lower insulating rod 11, the right end of the lower insulating rod 11 is provided with an armature 6, the lower side of the armature 6 is provided with a support frame 19, the outer side of the support frame 19 is provided with a coil P4, and the coil P4 is controlled by a coil switch 13.
When the utility model is used, the harmonic elimination device 1 comprises a harmonic elimination device 2 and a control box 12, when a power distribution system works normally, the harmonic elimination device 2 works normally, when the system capacitance current test is needed, a coil switch 13 in the control box 12 is closed, electromagnetic suction is generated after a coil P4 is electrified, an armature 6 at the upper end of a coil P4 is attracted to move downwards, the left side of the armature 6 is fixedly connected with a lower insulating rod 11, the lower insulating rod 11 rotates around a rotating shaft 7 to drive the upper insulating rod 11 to move rightwards, a spring B9 is stretched, a normally open switch K3 is pushed to be closed at the upper end of the upper insulating rod 10, a spring A8 is compressed, the harmonic elimination device 2 is in a short circuit state at the moment, the work to be tested is finished, the coil switch 13 is disconnected, the electromagnetic suction of the coil P4 disappears, the spring B9 pulls the upper insulating rod 10 to return to the original position, the spring A8 is extended to disconnect the normally open switch K3, the utility model has the characteristics of reduce equipment operation, reduce the cost of labor, improve work efficiency.
Example 2
As shown in fig. 1-3, a novel PT primary resonance eliminator comprises a primary resonance eliminator 2 and a resonance eliminator 1, wherein the primary resonance eliminator 2 is connected in series between a PT primary winding neutral wire 21 and a ground wire 20, the resonance eliminator 1 is connected in parallel to the primary resonance eliminator 2 through a lead 5, a control box 12 is arranged outside the resonance eliminator 1, a bottom plate 18 is arranged at the bottom of the inner side of the control box 12, a normally open switch K3 is arranged in the middle of the lead 5 inside the control box 12, a spring a8 is arranged on the upper side of the middle of the normally open switch K3, a first fixing plate 14 is arranged at the upper end of the spring a8, an upper insulating rod 10 is arranged on the lower side of the normally open switch K3, a spring B9 is arranged on the left side of the middle of the upper insulating rod 10, a second fixing plate 15 is arranged at the left end of the spring B9, a rotating shaft 7 is arranged at the lower end of the upper insulating, the right side of the rotating shaft 7 is provided with a lower insulating rod 11, the right end of the lower insulating rod 11 is provided with an armature 6, the lower side of the armature 6 is provided with a support frame 19, the outer side of the support frame 19 is provided with a coil P4, and the coil P4 is controlled by a coil switch 13.
For better effect, the PT primary winding is formed by connecting PT1, PT2 and PT3 in parallel.
For better effect, a stop A16 is arranged on the left side of the upper insulating rod 10, a stop B17 is arranged on the lower side of the lower insulating rod 11, and the stop A16 and the stop B17 have limiting function.
For better effect, the first fixing plate 14, the second fixing plate 15 and the rotating shaft 7 are all fixedly arranged on the bottom plate 18.
For better effect, the upper insulating rod 10 and the lower insulating rod 11 are fixedly connected with the rotating shaft 7, and the upper insulating rod 10 and the lower insulating rod 11 can rotate synchronously along with the rotating shaft 7.
For better effect, the coil P4 is controlled by other independent circuits, and the circuit used by the coil P4 and the circuit of the resonance elimination device 1 are not affected.
In order to achieve better effect, the control box 12 is arranged on the side surface of the secondary side switch cabinet, the use is convenient, and a cover plate is arranged on the front side of the control box 12 for protection.
For better effect, the upper insulating rod 10 and the lower insulating rod 11 are made of glass fiber reinforced plastic epoxy resin, and the material has good insulating and heat-resisting effects.
For better effect, the models of the primary harmonic elimination device 2 are LXQ-6KV, LXQ-10KV and LXQ-35KV, and can be selected according to the voltage grade of a distribution network system.
When the utility model is used, the primary resonance eliminator 2 is connected in series between a PT primary winding neutral wire 21 and a grounding wire 20, the resonance eliminator 1 is connected in parallel with the primary resonance eliminator 2 through a lead 5, the length of the lead 5 is long enough, a control box 12 is installed on the side surface of a secondary side switch cabinet, when a distribution system operates normally, a coil P4 is not powered on, the primary resonance eliminator 2 is normally used, at the moment, a spring A8 and a spring B9 are both in a normal state, when a system capacitance current test work needs to be carried out, a tester switches on a coil switch 13 on the secondary side of the switch cabinet, a coil P4 generates electromagnetic attraction after being electrified, an armature 6 on a coil P4 moves downwards, the armature 6 is fixedly connected with a lower insulating rod 11 on the left side, the lower insulating rod 11 and an upper insulating rod 10 can synchronously rotate around a rotating shaft 7, a stop block B17 can prevent the lower insulating rod 11 from excessively rotating to damage the coil P4, the lower insulating rod 11 drives the upper end of the upper insulating rod, until the normally open switch K3 is closed, the spring A8 is compressed, the spring B9 is stretched, the primary resonance eliminator 2 is in a short-circuit state after the normally open switch K3 is closed, the coil switch 13 is disconnected on the secondary side of the switch cabinet by a tester, the electromagnetic suction force of the coil P4 disappears, the spring B9 contracts to drive the upper insulating rod 10 to return to the initial position, the stop block A16 can prevent the upper insulating rod 10 from being too far to the left, so that the electromagnetic suction force of the coil P4 is not enough to adsorb the armature 6, the spring A8 extends to disconnect the normally open switch K3, the primary resonance eliminator 2 is put into operation again, the device only needs to be operated at the secondary side switch cabinet, the situation that the personnel stay in a high-voltage equipment area for a long time is avoided, the tester only needs to operate the low-voltage coil switch 13 to control the high-voltage switch K3, the safety of the device is greatly increased, the device can reduce the, the utility model has the characteristics of reduce equipment operation, reduce the cost of labor, improve work efficiency.
Claims (9)
1. The utility model provides a novel PT is harmonic elimination ware once, it includes harmonic elimination ware and harmonic elimination device, its characterized in that: the primary harmonic eliminator is connected in series between a PT primary winding neutral wire and a grounding wire, the harmonic eliminator is connected in parallel with the primary harmonic eliminator through a wire, a control box is arranged outside the harmonic eliminator, a bottom plate is arranged at the bottom of the inner side of the control box, a normally open switch K is arranged in the middle of the wire inside the control box, a spring A is arranged on the upper side of the middle of the normally open switch K, a first fixing plate is arranged at the upper end of the spring A, an upper insulating rod is arranged on the lower side of the normally open switch K, a spring B is arranged on the left side of the middle of the upper insulating rod, a second fixing plate is arranged at the left end of the spring B, a rotating shaft is arranged at the lower end of the upper insulating rod, a lower insulating rod is arranged on the right side of the rotating shaft, an armature is arranged at the right end of the lower insulating rod, a, the coil P is controlled by a coil switch.
2. A novel PT primary detuner as claimed in claim 1, wherein: the PT primary winding is formed by connecting PT1, PT2 and PT3 in parallel.
3. A novel PT primary detuner as claimed in claim 1, wherein: the left side of the upper insulating rod is provided with a stop block A, and the lower side of the lower insulating rod is provided with a stop block B.
4. A novel PT primary detuner as claimed in claim 1, wherein: the first fixing plate, the second fixing plate and the rotating shaft are all fixedly arranged on the bottom plate.
5. A novel PT primary detuner as claimed in claim 1, wherein: the upper insulating rod and the lower insulating rod are fixedly connected with the rotating shaft.
6. A novel PT primary detuner as claimed in claim 1, wherein: the coil P is controlled by other independent circuits.
7. A novel PT primary detuner as claimed in claim 1, wherein: the control box is arranged on the side surface of the secondary side switch cabinet.
8. A novel PT primary detuner as claimed in claim 1, wherein: the upper insulating rod and the lower insulating rod are made of glass fiber reinforced plastic epoxy resin.
9. A novel PT primary detuner as claimed in claim 1, wherein: the models of the primary harmonic elimination device are LXQ-6KV, LXQ-10KV and LXQ-35 KV.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021147855.4U CN212625144U (en) | 2020-06-19 | 2020-06-19 | Novel PT one-time resonance eliminator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021147855.4U CN212625144U (en) | 2020-06-19 | 2020-06-19 | Novel PT one-time resonance eliminator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212625144U true CN212625144U (en) | 2021-02-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021147855.4U Expired - Fee Related CN212625144U (en) | 2020-06-19 | 2020-06-19 | Novel PT one-time resonance eliminator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212625144U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113097986A (en) * | 2021-03-31 | 2021-07-09 | 国网内蒙古东部电力有限公司电力科学研究院 | Protection method, device and system for primary harmonic elimination device of distribution network voltage transformer |
-
2020
- 2020-06-19 CN CN202021147855.4U patent/CN212625144U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113097986A (en) * | 2021-03-31 | 2021-07-09 | 国网内蒙古东部电力有限公司电力科学研究院 | Protection method, device and system for primary harmonic elimination device of distribution network voltage transformer |
| CN113097986B (en) * | 2021-03-31 | 2022-10-18 | 国网内蒙古东部电力有限公司电力科学研究院 | Protection method, device and system for primary harmonic elimination device of distribution network voltage transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210226 Termination date: 20210619 |