CN216436873U - Power supply fast switching device applied to steel plant smelting reduction furnace and matched system - Google Patents
Power supply fast switching device applied to steel plant smelting reduction furnace and matched system Download PDFInfo
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- CN216436873U CN216436873U CN202122957910.7U CN202122957910U CN216436873U CN 216436873 U CN216436873 U CN 216436873U CN 202122957910 U CN202122957910 U CN 202122957910U CN 216436873 U CN216436873 U CN 216436873U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
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Abstract
The utility model discloses a power supply fast switching device applied to a smelting reduction furnace and a matching system of a steel plant, which comprises an electric energy quality detector, a current transformer group, a voltage transformer group, a zero sequence current transformer group, a breaker group and a fast switching controller; the circuit breaker group is respectively arranged in a working power supply inlet wire and a standby power supply inlet wire, and the electric energy quality detector is respectively connected with the working power supply inlet wire and the standby power supply inlet wire through the current transformer group, the voltage transformer group and the zero-sequence current transformer group; the fast switching controllers are respectively connected with the breaker groups; through the scheme, when the power supply is lost due to the short-circuit fault of the working power supply of the system, the switching time of the main power supply and the standby power supply is greatly shortened through the perfect matching of the electric energy quality detector, the fast switching device and the high-speed switch, and the huge economic loss or safety accident caused by the shutdown of the iron-making production line due to the shutdown of continuous operation equipment caused by the fluctuation of the power supply voltage is avoided.
Description
Technical Field
The utility model belongs to the technical field of the safe technique of smelting reduction furnace power supply and specifically relates to a be applied to quick auto-change over device of power of steel plant smelting reduction furnace and supporting system.
Background
The smelting reduction furnace (MPR furnace) is important equipment for producing high-purity cast pig iron and high-purity liquid metal, and is a new technology and a new process which are clean, energy-saving and consumption-reducing; the requirement on electric energy is high in the production process, once a power failure accident or a power interference accident occurs, the whole production line is forced to stop production, the common method at the present stage is to supply power by using a standby and one-use mode of two independent power supplies, and the working power supply is switched to a standby loop through a quick switching device when the working power supply fails.
The ordinary fast switching device judges the power state by detecting the voltage of two sections of buses, and the power state is used as a switching criterion, the voltage of 100MS to 200MS is interrupted in a short time for the power utilization side in the switching process, the undisturbed switching can not be realized, and the shutdown loss is caused to the power failure of equipment in operation.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at: aiming at the problems, the power supply fast switching device applied to the smelting reduction furnace and the matched system of the steel plant is provided, and the problems that the conventional fast switching device in the prior art cannot realize undisturbed switching when being switched for about 100-200 ms, and causes outage loss to running equipment are solved.
The utility model discloses a realize through following scheme:
the power supply fast switching device applied to the smelting reduction furnace and the matched system of the steel plant comprises an electric energy quality detector, a current transformer group, a voltage transformer group, a zero-sequence current transformer group, a breaker group and a fast switching controller; the circuit breaker group is respectively arranged in a working power supply inlet wire and a standby power supply inlet wire, and the electric energy quality detector is respectively connected with the working power supply inlet wire and the standby power supply inlet wire through the current transformer group, the voltage transformer group and the zero-sequence current transformer group; and the fast switching controllers are respectively connected with the breaker groups.
Based on the structure of the power supply fast switching device applied to the smelting reduction furnace and the matched system of the steel plant, the current transformer group comprises a first current transformer and a second current transformer; the voltage transformer group comprises a first voltage transformer and a second voltage transformer; the zero sequence current transformer group comprises a first zero sequence current transformer and a second zero sequence current transformer.
Based on the structure of the power supply fast switching device applied to the smelting reduction furnace and the matched system of the steel plant, the electric energy quality detector is connected with an inlet wire of a working power supply through a first current transformer, a first voltage transformer and a first zero sequence current transformer; the electric energy quality detector is connected with the standby power supply inlet wire through a second current transformer, a second voltage transformer and a second zero sequence current transformer.
Based on the structure of the power supply fast switching device applied to the smelting reduction furnace and the matched system of the steel plant, the circuit breaker group comprises a first circuit breaker, a second circuit breaker, a third circuit breaker and a fourth circuit breaker, the first circuit breaker and the third circuit breaker are arranged in a working power supply inlet wire, and the second circuit breaker and the fourth circuit breaker are arranged in a standby power supply inlet wire.
Based on the structure of the power supply quick switching device applied to the melting reduction furnace and the matched system of the steel plant, the first circuit breaker and the second circuit breaker are vortex repulsion high-speed vacuum circuit breakers.
Based on the structure of the power supply fast switching device applied to the smelting reduction furnace and the matched system of the steel plant, the third circuit breaker and the fourth circuit breaker are both common circuit breakers.
To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:
1. through the scheme, when the power supply is lost due to the short-circuit fault of the working power supply of the system, the switching time of the main power supply and the standby power supply is greatly shortened through the perfect matching of the electric energy quality detector, the fast switching device and the high-speed switch, and the huge economic loss or safety accident caused by the shutdown of the iron-making production line due to the shutdown of continuous operation equipment caused by the fluctuation of the power supply voltage is avoided.
Drawings
FIG. 1 is a schematic cross-sectional structure of the whole body of the present invention;
description of the drawings: 1. a power quality detector; 2. a fast switching controller; 3. leading a working power supply into a wire; 4. leading in a standby power supply; 21. a first current transformer; 22. a second current transformer; 31. a first voltage transformer; 32. a second voltage transformer; 41. a first zero sequence current transformer; 42. a second zero sequence current transformer; 51. a first circuit breaker; 52. a second circuit breaker; 53. a third circuit breaker; 54. and a fourth circuit breaker.
Detailed Description
All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.
Any feature disclosed in this specification (including any accompanying claims, abstract) may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the designated device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature.
Example 1
As shown in fig. 1, the embodiment provides a power supply fast switching device applied to a smelting reduction furnace and a supporting system in an iron and steel plant, which includes an electric energy quality detector 1, a current transformer group, a voltage transformer group, a zero-sequence current transformer group, a breaker group and a fast switching controller 2; the circuit breaker group is respectively arranged in the working power supply inlet wire 3 and the standby power supply inlet wire 4, and the electric energy quality detector 1 is respectively connected with the working power supply inlet wire 3 and the standby power supply inlet wire 4 through the current transformer group, the voltage transformer group and the zero sequence current transformer group; the fast switching controller 2 is respectively connected with the breaker group;
based on the structure, the electric energy quality detector 1 carries out real-time detection on the current values in the working power supply inlet wire 3 and the standby power supply inlet wire 4 through the current transformer group, carries out real-time detection on the voltage values in the working power supply inlet wire 3 and the standby power supply inlet wire 4 through the voltage transformer group, detects the unbalanced three-phase current values in the working power supply inlet wire 3 and the standby power supply inlet wire 4 through the zero sequence current transformer group, and enables the electric energy quality detector 1 to detect all data of the working power supply inlet wire 3 and the standby power supply inlet wire 4 in an all-round and real-time mode.
The current transformer group comprises a first current transformer 21 and a second current transformer 22; the voltage transformer group comprises a first voltage transformer 31 and a second voltage transformer 32; the zero sequence current transformer group comprises a first zero sequence current transformer 41 and a second zero sequence current transformer 42;
one side of the electric energy quality detector 1 is connected with a working power supply inlet wire 3 through a first current transformer 21, a first voltage transformer 31 and a first zero sequence current transformer 41; the other side of the electric energy quality detector 1 is connected with a standby power inlet wire 4 through a second current transformer 22, a second voltage transformer 32 and a second zero sequence current transformer 42;
the breaker group comprises a first breaker 51, a second breaker 52, a third breaker 53 and a fourth breaker 54, wherein the first breaker 51 and the third breaker 53 are arranged in the working power inlet line 3, and the second breaker 52 and the fourth breaker 54 are arranged in the standby power inlet line 4; the working power inlet wire 3 is rapidly switched through the first breaker 51 and the third breaker 53; the standby power inlet wire 4 is rapidly switched through the second circuit breaker 52 and the fourth circuit breaker 54;
the first breaker 51 and the second breaker 52 are eddy current repulsion high-speed vacuum breakers.
The eddy current repulsion high-speed vacuum circuit breaker is adopted, so that the circuit switching is faster, more efficient and more stable, the system is switched in a very short time, the normal operation of the load is hardly influenced, and the safety of a rear-end device is ensured.
The electric energy quality detector 1 monitors whether the frequency parameters and the voltage parameters of two paths of power supplies are within a specified range in real time, when the frequency or the voltage parameters of a working power supply reach a specified action range (the frequency fluctuation is +/-1 Hz, and the voltage is reduced to be below 70% of the specified voltage), the electric energy quality detector 1 sends an instruction to start fast switching, the fast switching controller 2 simultaneously sends opening and closing instructions to a third breaker 53 of a working power supply inlet wire 3 and a fourth breaker 54 of a standby power supply inlet wire 4, the high-speed closing capability of the eddy current repulsion high-speed vacuum breaker is matched, the switching time of the system no current is the opening and closing time difference of the breaker, and the no current switching time is about 7ms, so the normal operation of a load is hardly influenced.
Fast switching test process of the fast switching device: when the electric energy quality detector 1 judges that the working power supply is subjected to electric dazzling or the voltage is instantly reduced, the delay 5MS sends a switching instruction to the fast switching controller 2, the fast switching controller 2 sends a switching-off instruction to the third breaker 53 of the working power supply inlet wire 3 and a switching-on instruction to the fourth breaker 54 of the standby power supply inlet wire 4 without delay, the working power supply inlet wire 3 finishes 5MS tripping, the standby power supply finishes 12MS switching-on, and the normal power supply is recovered after the system voltage fluctuates by 7 MS;
through the scheme, when the power supply is lost due to the short-circuit fault of the working power supply of the system, the switching time of the main power supply and the standby power supply is greatly shortened through the perfect matching of the electric energy quality detector 1, the fast switching device and the high-speed switch, and the huge economic loss or safety accident caused by the shutdown of the iron-making production line due to the shutdown of continuous operation equipment caused by the fluctuation of the power supply voltage is avoided.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (6)
1. Be applied to steel plant smelting reduction furnace and supporting system's quick auto-change over device of power, its characterized in that: the system comprises an electric energy quality detector, a current transformer group, a voltage transformer group, a zero-sequence current transformer group, a circuit breaker group and a fast switching controller; the circuit breaker group is respectively arranged in a working power supply inlet wire and a standby power supply inlet wire, and the electric energy quality detector is respectively connected with the working power supply inlet wire and the standby power supply inlet wire through the current transformer group, the voltage transformer group and the zero-sequence current transformer group; and the fast switching controllers are respectively connected with the breaker groups.
2. The power supply fast switching device applied to the smelting reduction furnace and the matching system of the steel plant as claimed in claim 1, characterized in that: the current transformer group comprises a first current transformer and a second current transformer; the voltage transformer group comprises a first voltage transformer and a second voltage transformer; the zero sequence current transformer group comprises a first zero sequence current transformer and a second zero sequence current transformer.
3. The power supply fast switching device applied to the smelting reduction furnace and the matching system of the steel plant as claimed in claim 2, characterized in that: the electric energy quality detector is connected with an inlet wire of a working power supply through a first current transformer, a first voltage transformer and a first zero sequence current transformer; the electric energy quality detector is connected with the standby power supply inlet wire through a second current transformer, a second voltage transformer and a second zero sequence current transformer.
4. The power supply fast switching device applied to the smelting reduction furnace and the matching system of the steel plant according to claim 3, characterized in that: the breaker group comprises a first breaker, a second breaker, a third breaker and a fourth breaker, wherein the first breaker and the third breaker are arranged in an inlet wire of a working power supply, and the second breaker and the fourth breaker are arranged in an inlet wire of a standby power supply.
5. The apparatus of claim 4, wherein the apparatus comprises: the first circuit breaker and the second circuit breaker are eddy current repulsion high-speed vacuum circuit breakers.
6. The power supply fast switching device applied to the smelting reduction furnace and the matching system of the steel plant as claimed in claim 5, wherein: and the third circuit breaker and the fourth circuit breaker are both ordinary circuit breakers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122957910.7U CN216436873U (en) | 2021-11-29 | 2021-11-29 | Power supply fast switching device applied to steel plant smelting reduction furnace and matched system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122957910.7U CN216436873U (en) | 2021-11-29 | 2021-11-29 | Power supply fast switching device applied to steel plant smelting reduction furnace and matched system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216436873U true CN216436873U (en) | 2022-05-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122957910.7U Active CN216436873U (en) | 2021-11-29 | 2021-11-29 | Power supply fast switching device applied to steel plant smelting reduction furnace and matched system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216436873U (en) |
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2021
- 2021-11-29 CN CN202122957910.7U patent/CN216436873U/en active Active
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