CN202663123U - Programmable logic controller (PLC)-based iron alloy smelting electric arc furnace low voltage reactive compensation device - Google Patents
Programmable logic controller (PLC)-based iron alloy smelting electric arc furnace low voltage reactive compensation device Download PDFInfo
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- CN202663123U CN202663123U CN 201220297962 CN201220297962U CN202663123U CN 202663123 U CN202663123 U CN 202663123U CN 201220297962 CN201220297962 CN 201220297962 CN 201220297962 U CN201220297962 U CN 201220297962U CN 202663123 U CN202663123 U CN 202663123U
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- programmable logic
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
Abstract
The utility model discloses a programmable logic controller (PLC)-based iron alloy smelting electric arc furnace low voltage reactive compensation device, relates to the technical field of smelting, and aims to solve technical problems of over-compensation of a strong phase, under-compensation of a weak phase, and large impact during switching process of a conventional fixed reactive compensation device. An input end of a high voltage current transformer (1) is connected with a high voltage incoming line (11), a first output end of the high voltage current transformer is connected in series with a current transmitter (3) and then connected with a first input end of the programmable logic controller (PLC) (5), a second output end is connected in series with a high voltage transformer (2) and a voltage transmitter (4) and then connected with a second input end of the PLC (5), a third output end is connected in series with a transformer (6) and a short network (16) and then connected with an electrode (17); the other output of the transformer (6) is connected in series with a compensation circuit branch and then connected with the third input end of the PLC (5); and the PLC (5) is connected with a human machine interface (10) and the compensation circuit branch.
Description
Technical field
The utility model patent relates to technical field of smelting, particularly a kind of In The Sub-mergedfurnace of The Ferroalloys low-voltage reactive compensator capable based on PLC control.
Background technology
Traditional fixedly reactive power compensator is comprised of circuit breaker, contactor, thermal relay, capacitor, adopts common three-phase, large capacity self healing capacitor to carry out three-phase total compensation mode switching.Owing to being uneven in length, every mutually short net make three phase reactive power itself uneven, the idle simultaneously compensation of three-phase when the device switching, and there are the following problems:
1. cross to mend mutually by force, weakly owe mutually to mend, the switching process impacts large, large to the capacitor damage, switch contact and easily burns;
2. noise is large, switching time-delay process is long, slow in reacting;
3. defencive function is more single;
4. compensation degree of unbalance aggravation causes three-phase reactive power compensation imbalance to cause the three-phase electrode Voltage unbalance, is caused that mineral hot furnace efficient is low, power consumption large, the unsecured power supply quality that causes of Systems balanth is worsened by the three-phase activity coefficient imbalance.
In addition, because mineral hot furnace is a kind of typical highly energy-consuming equipment, in electrical system, smelting transformer and short net all are inductive loads, and being in operation needs to consume a large amount of reactive powers, causes power factor generally on the low side.
Summary of the invention
The utility model be intended to solve tradition fixedly reactive power compensator exist cross mutually by force mend, weakly owe mutually to mend, the switching process impacts many technical problems such as large, large to the capacitor damage, that switch contact easily burns, switching time-delay process is long and defencive function is more single, the In The Sub-mergedfurnace of The Ferroalloys low-voltage reactive compensator capable of realize automatic control to provide a kind of, control precision is high, technical parameter is stable controlling based on PLC.
The purpose of this utility model is achieved through the following technical solutions.
In The Sub-mergedfurnace of The Ferroalloys low-voltage reactive compensator capable based on PLC control of the present utility model, the input of high-tension current inductor 1 is connected with high pressure inlet wire 11, the input one of its output one serial connection current transducer 3 rear connection Programmable Logic Controller PLC5, the output two serial connection high voltage potential transformers 2 of high-tension current inductor 1, the input two of voltage transmitter 4 rear connection Programmable Logic Controller PLC5, output three series transformers 6 and the short net 16 rear connecting electrodes 17 of high-tension current inductor 1, transformer 6 has the input three that connects Programmable Logic Controller PLC5 behind one tunnel output serial connection compensation branch road in addition, the output of Programmable Logic Controller PLC5 connects man-machine interface 10 by Ethernet 12, and its another output connects the compensation branch road.
In The Sub-mergedfurnace of The Ferroalloys low-voltage reactive compensator capable based on PLC control of the present utility model, wherein said compensation is propped up route and is organized the parallel branch composition more, every group is propped up route triac controller in sequential series 7, reactor 8 and capacitor 9 formations, and wherein triac controller 7 connects Programmable Logic Controller PLC5.
In The Sub-mergedfurnace of The Ferroalloys low-voltage reactive compensator capable based on PLC control of the present utility model, wherein said capacitor 9 is made of the electric capacity of three parallel connections.
The utility model is based on the beneficial effect of the In The Sub-mergedfurnace of The Ferroalloys low-voltage reactive compensator capable of PLC control: use PLC control; signal processing time is short; speed is fast; be provided with security interlocking protection for the treatment of industrial control device based on the speed that signal is processed and program is moved; control system can be effective; instant and control and compensation system efficiently; guarantee that bucking-out system and electric furnace three-phase power balance are controlled to be integral system; designed overcurrent protection; undercurrent protection; overvoltage protection; under voltage protection; open-phase protection; short-circuit protection; the switching overvoltage protection; the defencive functions such as temperature rise; finish low-voltage compensation system divide-shut brake; the divide-shut brake of capacitor group; accident alarm; accident protection; the functions such as accident demonstration can be avoided benefit; the condition of owing to repay a kindness occurs.
Description of drawings
Fig. 1 is structural principle schematic diagram of the present utility model
The number in the figure explanation:
1 high-tension current inductor, 2 high voltage potential transformers, 3 current transducers, 4 voltage transmitters, 5 Programmable Logic Controller PLC, 6 transformers, 7 triac controllers, 8 reactors, 9 capacitors, 10 man-machine interfaces, 11 high pressure inlet wires, 12 Ethernets, the detection of 13 accidents and auto-compensation control, the rear data acquisition of 14 compensation inputs and feedback, 15 compensation weak point nets, 16 weak point nets, 17 electrodes, 18 burner hearths
Embodiment
The utility model detailed construction, application principle, effect and effect with reference to accompanying drawing 1, are explained by following execution mode.
The utility model is based on the In The Sub-mergedfurnace of The Ferroalloys low-voltage reactive compensator capable of PLC control as shown in Figure 1, the input of high-tension current inductor 1 is connected with high pressure inlet wire 11, the input one of its output one serial connection current transducer 3 rear connection Programmable Logic Controller PLC5, the output two serial connection high voltage potential transformers 2 of high-tension current inductor 1, the input two of voltage transmitter 4 rear connection Programmable Logic Controller PLC5, output three series transformers 6 and the short net 16 rear connecting electrodes 17 of high-tension current inductor 1, transformer 6 has the input three that connects Programmable Logic Controller PLC5 behind one tunnel output serial connection compensation branch road in addition, the output of Programmable Logic Controller PLC5 connects man-machine interface 10 by Ethernet 12, and its another output connects the compensation branch road.A compensation route is organized parallel branch more and is formed, and every group is propped up route triac controller in sequential series 7, reactor 8 and capacitor 9 formations, and wherein triac controller 7 connects Programmable Logic Controller PLC5.Capacitor 9 is made of the electric capacity of three parallel connections.
In the high pressure end of incoming cables by current transducer and voltage transmitter, with high-tension electricity flow and voltage after isolation is amplified, convert to and input current, electric current and the voltage of the linear ratio output of voltage, this detection signal is sent to Programmable Logic Controller PLC 5, Programmable Logic Controller PLC 5 reader within a cycle will detect this semaphore, and read electric current and the magnitude of voltage of input, should value be transferred to man-machine interface 10 by Ethernet again, on man-machine interface 10, can see intuitively this electric current that detects, magnitude of voltage, add respectively current transducer and voltage transmitter at the compensation branch road, electric current and magnitude of voltage when transmitter all will detect this branch road operation when the compensation branch road drops into and excises, should value be transferred to Programmable Logic Controller PLC 5 by 485 communication interfaces, electric current and magnitude of voltage in the time of in Programmable Logic Controller PLC 5 programs, will reading this switching, then with the PLC program in the switching threshold current set, magnitude of voltage compares, detect and auto-compensation control 13 with accident again, compensation drops into rear data acquisition and feeds back 14 and carry out integrated treatment, send out switching way control command at last compensation branch road triac controller, electric current during simultaneously with this switching, magnitude of voltage is transferred to man-machine interface, thereby realizes the automatic switching of unmanned guard.
In sum, the utility model is for the characteristics of mineral hot furnace, the low voltage parallel capacitor phase splitting compensation system of design, reactive power consumption to mineral hot furnace compensates, to reach the purpose that improves power factor and system's active power utilance, and carry out centralized control by 5 pairs of all kinds of inputs of Programmable Logic Controller PLC, output signal, realized the automation control of system.
Claims (3)
1. the In The Sub-mergedfurnace of The Ferroalloys low-voltage reactive compensator capable of controlling based on PLC, it is characterized in that: the input of high-tension current inductor (1) is connected with high pressure inlet wire (11), connection Programmable Logic Controller PLC(5 behind its output one serial connection current transducer (3)) input one, the output two serial connection high voltage potential transformers (2) of high-tension current inductor (1), connection Programmable Logic Controller PLC(5 behind the voltage transmitter (4)) input two, connecting electrode (17) behind output three series transformers (6) of high-tension current inductor (1) and the short net (16), transformer (6) connects Programmable Logic Controller PLC(5 after one tunnel output serial connection compensation branch road is arranged in addition) input three, Programmable Logic Controller PLC(5) a output connects man-machine interface (10) by Ethernet (12), and its another output connects the compensation branch road.
2. the In The Sub-mergedfurnace of The Ferroalloys low-voltage reactive compensator capable based on PLC control according to claim 1, it is characterized in that: described compensation is propped up route and is organized the parallel branch composition more, every group is propped up route triac controller in sequential series (7), reactor (8) and capacitor (9) formation, and wherein triac controller (7) connects Programmable Logic Controller PLC(5).
3. the In The Sub-mergedfurnace of The Ferroalloys low-voltage reactive compensator capable based on PLC control according to claim 1, it is characterized in that: described capacitor (9) is made of the electric capacity of three parallel connections.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220297962 CN202663123U (en) | 2012-06-25 | 2012-06-25 | Programmable logic controller (PLC)-based iron alloy smelting electric arc furnace low voltage reactive compensation device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220297962 CN202663123U (en) | 2012-06-25 | 2012-06-25 | Programmable logic controller (PLC)-based iron alloy smelting electric arc furnace low voltage reactive compensation device |
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| CN202663123U true CN202663123U (en) | 2013-01-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220297962 Expired - Fee Related CN202663123U (en) | 2012-06-25 | 2012-06-25 | Programmable logic controller (PLC)-based iron alloy smelting electric arc furnace low voltage reactive compensation device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103606889B (en) * | 2013-11-26 | 2016-01-20 | 四川西南不锈钢有限责任公司 | A kind of secondary side overcurrent protection circuit of electric arc furnace transformer |
| CN113437718A (en) * | 2021-03-29 | 2021-09-24 | 贵州电网有限责任公司 | Zero-rise ice melting device of generator |
-
2012
- 2012-06-25 CN CN 201220297962 patent/CN202663123U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103606889B (en) * | 2013-11-26 | 2016-01-20 | 四川西南不锈钢有限责任公司 | A kind of secondary side overcurrent protection circuit of electric arc furnace transformer |
| CN113437718A (en) * | 2021-03-29 | 2021-09-24 | 贵州电网有限责任公司 | Zero-rise ice melting device of generator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130109 Termination date: 20150625 |
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| EXPY | Termination of patent right or utility model |