CN219875100U - Low-voltage defense device for electricity end for chemical production - Google Patents
Low-voltage defense device for electricity end for chemical production Download PDFInfo
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- CN219875100U CN219875100U CN202320157703.XU CN202320157703U CN219875100U CN 219875100 U CN219875100 U CN 219875100U CN 202320157703 U CN202320157703 U CN 202320157703U CN 219875100 U CN219875100 U CN 219875100U
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- 238000012824 chemical production Methods 0.000 title claims abstract description 13
- 230000005611 electricity Effects 0.000 title claims abstract description 10
- 230000007123 defense Effects 0.000 title description 9
- 238000004804 winding Methods 0.000 claims abstract description 27
- 230000001105 regulatory effect Effects 0.000 claims abstract description 19
- 230000003247 decreasing effect Effects 0.000 claims description 4
- 230000004044 response Effects 0.000 abstract description 5
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000000126 substance Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001603 reducing effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model provides a low voltage defending device of electricity end for chemical production, adds voltage fluctuation defending device VD between power input Vs and load input Vo, is equipped with regulating transformer T in the voltage fluctuation defending device VD, and regulating transformer T' S primary winding V1 inlet wire end is connected with power input Vs electricity through high voltage circuit breaker S2, and three-phase primary winding V1 outlet wire end short circuit is equipped with a plurality of taps that are used for adjusting the turn ratio on the primary winding V1. The configuration power of the voltage fluctuation defending device is only about 10% of the load power, the traditional regulating switch adopts an on-load regulating switch, and the problems of contact heating, low service life, high fault rate, slow response time and the like exist.
Description
Technical Field
The utility model relates to the technical field of electrical systems, in particular to an electric end low-voltage defense device for chemical production.
Background
In the construction process of chemical enterprises, a general phenomenon exists, as chemical production devices are increasingly enlarged, power supply and utilization load devices are also increasingly larger, especially the problem of safe operation of equipment is particularly prominent after the voltage of power supply equipment is low after long-distance power supply, and under the condition that the power supply equipment is not produced at night or by mistake, collinear voltage is increased, the current chemical power supply and distribution voltage is generally about 9.4kV, the power supply and distribution voltage is required to be maintained above 10.3kV in production, the automation degree of production is high, a continuous running water production line is particularly sensitive to voltage fluctuation, and the deviation value of the three-phase power supply voltage of 20kV and below according to the standard of the power quality is +/-7% of the nominal voltage; the low voltage phenomenon is divided into a steady-state low voltage and a transient low voltage, wherein the steady-state low voltage can have great influence on the service life and the working performance of lighting, motors, transformers, circuits and capacitors, and the transient low voltage has great influence on sensitive equipment, and can cause the phenomena of tripping, flashing, controller crash and the like.
Disclosure of Invention
The utility model aims to solve the technical problem of providing a low-voltage defense device for an electric terminal in chemical production, which solves the problem of low voltage of the electric terminal.
In order to solve the technical problems, the utility model adopts the following technical scheme:
the utility model provides a low voltage defending device of electric end for chemical production, add voltage fluctuation defending device VD between power input Vs and load input Vo, be equipped with regulating transformer T in the voltage fluctuation defending device VD, regulating transformer T ' S primary winding V1 inlet wire end is connected with power input Vs electricity through high voltage circuit breaker S2, three-phase primary winding V1 outlet wire end short circuit, regulating transformer T ' S secondary winding V2 inlet wire end is connected with power input Vs through high voltage circuit breaker S1, regulating transformer T ' S secondary winding outlet wire end V2 is connected with load input Vo electricity, be equipped with a plurality of taps that are used for adjusting the turn ratio on the primary winding V1.
The primary winding V1 of the transformer T is provided with three taps, the turns ratio of the middle tap to the secondary winding V2 is 1, and the turns ratio of the other two taps is increased and decreased with respect to 1, respectively.
The turns ratios of the three taps of the primary winding V1 and the secondary winding V2 of the transformer T described above are 110%, 1 and 90%, respectively.
The voltage fluctuation defending device VD is internally provided with an automatic control and protection device L1, voltage transformers electrically connected with the input end of the automatic control and protection device L1 are arranged at the positions of the power input end Vs and the load input end Vo, current transformers electrically connected with the input end of the automatic control and protection device L1 are arranged at the position of the load input end Vo, and the output end of the automatic control and protection device L1 controls one of three taps of a primary coil V1 of a turn-on transformer T.
The low-voltage defense device for the electric end for chemical production has the advantages that the configuration power of the voltage fluctuation defense device is only about 10% of the load power, the conventional regulating switch adopts the on-load regulating switch, the problems of contact heating, low service life, high failure rate, slow response time and the like exist, the VFOS of the voltage fluctuation defense device adopts the thyristor as the regulating switch, the high-voltage system adopts the quick circuit breaker, and the low-voltage defense device has the advantages of no contact, high reliability, quick response time and the like, and has low loss, low manufacturing cost and high reliability.
Drawings
The utility model is further illustrated by the following examples in conjunction with the accompanying drawings:
FIG. 1 is a control schematic diagram of the present utility model;
FIG. 2 is a schematic diagram of the wiring of the present utility model;
fig. 3 shows a first embodiment of the voltage fluctuation preventing device VD;
fig. 4 shows a second embodiment of the voltage fluctuation preventing device VD.
Detailed Description
The utility model provides a low voltage defending device of electric end for chemical production, add voltage fluctuation defending device VD between power input Vs and load input Vo, be equipped with regulating transformer T in the voltage fluctuation defending device VD, regulating transformer T ' S primary winding V1 inlet wire end is connected with power input Vs electricity through high voltage circuit breaker S2, three-phase primary winding V1 outlet wire end short circuit, regulating transformer T ' S secondary winding V2 inlet wire end is connected with power input Vs through high voltage circuit breaker S1, regulating transformer T ' S secondary winding outlet wire end V2 is connected with load input Vo electricity, be equipped with a plurality of taps that are used for adjusting the turn ratio on the primary winding V1.
As shown in fig. 1 and 2, the purpose of stabilizing the load terminal voltage is achieved by adjusting the tap of the primary winding V1 by more or less than the standard voltage in order to adjust the turns ratio between the primary and secondary of the transformer so as to raise or lower the load terminal voltage.
The primary winding V1 of the transformer T is provided with three taps, the turns ratio of the middle tap to the secondary winding V2 is 1, and the turns ratio of the other two taps is increased and decreased with respect to 1, respectively.
Through the tap with the middle turn ratio of 1, the turn ratios of the other two taps are respectively increased and decreased, so that the boosting and the reducing effects of the voltage defense device VD are achieved, and when the input voltage meets the standard, the voltage is placed in the middle tap; when the input voltage is lower than the standard, the tap with the reduced turns ratio achieves the boosting effect; when the input voltage is higher than the standard, the tap placed at the increased turns ratio achieves a step-down effect.
The turns ratios of the three taps of the primary winding V1 and the secondary winding V2 of the transformer T described above are 110%, 1 and 90%, respectively.
The voltage fluctuation defending device VD is internally provided with an automatic control and protection device L1, voltage transformers electrically connected with the input end of the automatic control and protection device L1 are arranged at the positions of the power input end Vs and the load input end Vo, current transformers electrically connected with the input end of the automatic control and protection device L1 are arranged at the position of the load input end Vo, and the output end of the automatic control and protection device L1 controls one of three taps of a primary coil V1 of a turn-on transformer T.
As shown in fig. 3, according to the production needs and equipment conditions of a chemical plant, a large voltage fluctuation defending device VD can be connected to the outlet end of the transformer, so as to stabilize the voltages of all power supply loads and protect the whole bus; as shown in fig. 4, the voltage fluctuation preventing device VD1 or VD2 may be provided at a specific bus or device, so that the capacity required for the voltage fluctuation preventing device may be reduced, the cost may be reduced, and the voltage fluctuation preventing device may be provided only at a bus or device sensitive to voltage or requiring high voltage.
Voltage regulation scheme:
according to the load capacity, if the voltage boosting degree of the load end is designed according to 15%, the load rate of the VFOS equipment is considered according to 80% in general; as shown in fig. 1, S1 and S2 are high-voltage circuit breakers, and the high-voltage circuit breakers can be common circuit breakers, and quick circuit breakers can be adopted to improve the switching response speed and ensure the stable operation of the receiving end load.
The rated voltage V1 of the primary side of the transformer is 10kV, and the rated voltage V2 of the secondary side is 900V. The high side of the transformer was designed with 110% and 90% wiring taps and the tuning capacity parameters are detailed in table 1.
TABLE 1VFOS adjustment capability parameter Table
Because the voltage is lower, the load can not be started normally, or abnormal shutdown is caused, or equipment is damaged due to the fact that the voltage is lower, potential fire hazards and life safety hazards can be caused, the production work is endangered, and the system parameters after treatment are shown in table 2.
TABLE 2VFOS System parameter Table
| Sequence number | Rated voltage of system | 10kV |
| 1 | Output voltage | 10kV±7％ |
| 2 | Voltage fluctuation control range | 90％～105％ |
| 3 | Response time | And (3) fast switching: 15ms, normal switch: 60ms |
| 4 | Overload capability | 1.2 times |
| 5 | Compensating for voltage imbalance | ＜3％ |
| 6 | Voltage compensation accuracy | ＜2％ |
| 7 | Efficiency of the whole machine | ＞97％ |
| 8 | Loss of | ＜2％ |
| 9 | Total harmonic distortion rate of voltage | ＜2％ |
| 11 | System protection | PT short line, phase error, overcurrent and other protection actions do not affect the original normal power supply |
Claims (4)
1. The utility model provides a low voltage defending device of electric end for chemical production, characterized by adds voltage fluctuation defending device VD between power input Vs and load input Vo, be equipped with regulating transformer T in the voltage fluctuation defending device VD, regulating transformer T ' S primary winding V1 incoming line end is connected with power input Vs electricity through high voltage circuit breaker S2, three-phase primary winding V1 outgoing line end short circuit, regulating transformer T ' S secondary winding V2 incoming line end is connected with power input Vs through high voltage circuit breaker S1, regulating transformer T ' S secondary winding outgoing line end V2 is connected with load input Vo electricity, be equipped with a plurality of taps that are used for adjusting the turns ratio on the primary winding V1.
2. The electric end low voltage defending device for chemical production according to claim 1, wherein the primary coil V1 of the transformer T is provided with three taps, the turn ratio of one tap in the middle to the V2 of the secondary coil is 1, and the turn ratio of the other two taps is increased and decreased relative to 1 respectively.
3. The low-voltage protection device for the electrical end of the chemical production according to claim 2, wherein the turns ratios of three taps of the primary coil V1 and V2 of the secondary coil of the transformer T are 110%, 1 and 90%, respectively.
4. The low voltage protection device for electrical end of chemical production according to claim 3, wherein the voltage fluctuation protection device VD is internally provided with an automatic control and protection device L1, voltage transformers electrically connected with the input end of the automatic control and protection device L1 are arranged at the power input end Vs and the load input end Vo, a current transformer electrically connected with the input end of the automatic control and protection device L1 is arranged at the load input end Vo, and the output end of the automatic control and protection device L1 controls one of three taps of the primary coil V1 connected with the transformer T.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320157703.XU CN219875100U (en) | 2023-02-08 | 2023-02-08 | Low-voltage defense device for electricity end for chemical production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320157703.XU CN219875100U (en) | 2023-02-08 | 2023-02-08 | Low-voltage defense device for electricity end for chemical production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219875100U true CN219875100U (en) | 2023-10-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320157703.XU Active CN219875100U (en) | 2023-02-08 | 2023-02-08 | Low-voltage defense device for electricity end for chemical production |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219875100U (en) |
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2023
- 2023-02-08 CN CN202320157703.XU patent/CN219875100U/en active Active
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