CN109995048A - A kind of power factor compensation device of connected furnace - Google Patents
A kind of power factor compensation device of connected furnace Download PDFInfo
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- CN109995048A CN109995048A CN201910308740.4A CN201910308740A CN109995048A CN 109995048 A CN109995048 A CN 109995048A CN 201910308740 A CN201910308740 A CN 201910308740A CN 109995048 A CN109995048 A CN 109995048A
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- Prior art keywords
- power factor
- plc controller
- capacitor
- connect
- compensation device
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
- H02J3/1835—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control
- H02J3/1864—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control wherein the stepless control of reactive power is obtained by at least one reactive element connected in series with a semiconductor switch
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Electrical Variables (AREA)
Abstract
The invention discloses a kind of twin coil line-frequency induction connected furnace automatic power factor compensators, it includes sensor, PLC controller, actuator controller, the sensor is used to acquire the parameter of three-phase electricity, its output end is connect with PLC controller, the output end of the PLC controller and the input terminal of actuator controller connect, the output end of the actuator controller is connect with multiple contactors, one group of compensating capacitor switching of each corresponding control of the contactor, the supplement capacitor is for compensating three-phase electricity.The present invention has the advantages that realize automatic control for capacitor switching by detection data, to meet the variation of two kinds of gears of twin coil connected furnace, to preferably adapt to connected furnace, so that its alternate balance of electric current and compensation power factor at work.
Description
Technical field
The present invention relates to non-ferrous metal smelting technology, in particular to a kind of twin coil line-frequency induction connected furnace power because
Number autocompensation installation.
Background technique
Twin coil line-frequency induction connected furnace is that the enterprise of single material non-ferrous metal calendering at present is used to melt and carry out mold
Draw one of molding capital equipment, due to twin coil line-frequency induction connected furnace have in molten copper the thermal efficiency is high, electrical efficiency is high,
Metal loss is few and burner hearth in the advantages that temperature is uniform, furnace temperature is stablized, roll the production of industry in partial metallurgical, non-ferrous metal
In widely used.
Although the use of twin coil line-frequency induction connected furnace has more advantages, in twin coil line-frequency induction connected furnace
Still there is following technical problem in use process, twin coil line-frequency induction connected furnace in power supply system in use, due to
The characteristic of its twin coil causes geneogenous three phase supply electric current alternate unbalance, and coil properties, in perception, the prior art is as such as
Fig. 1, shown in 2, Fig. 2 is the deformation schematic diagram of Fig. 1 wiring construction figure, therefore one group of benefit is equipped on the three phase mains of smelting-casting equipment
Capacitor is repaid, current balance type and reactive compensation is carried out using the mode of two-phase while switching capacitance, has passed through a certain number of capacitors
Dynamic switching is repaid, but since smelting-casting equipment has the relatively independent building ring in two kinds of melting furnace area and holding furnace area in actual operation
Border needs constantly to carry out the adjustment of voltage gear, prevent static capacitance compensation is from well as smelting-casting equipment works
The variation of state is compensated accordingly, keeps the power factor of power supply sometimes relatively low or overcompensation.
Summary of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of twin coil line-frequency induction connected furnace power because
Number autocompensation installation, realizes automatic controllable compensating.
To achieve the goals above, a kind of the technical solution adopted by the present invention are as follows: twin coil line-frequency induction connected furnace power
Factor automatic compensator comprising sensor, PLC controller, actuator controller, the sensor is for acquiring three-phase
The parameter of electricity, output end are connect with PLC controller, the output end of the PLC controller and the input of actuator controller
End connection, the output end of the actuator controller are connect with multiple contactors, each corresponding control one of the contactor
Group compensating capacitor switching, the supplement capacitor is for compensating three-phase electricity.
The compensation capacitor includes that six groups of compensating electric capacities are respectively connected to power supply, and capacitor group C4 is wherein put between U1, V1,
Capacitor group C1 is put between U2, V2, capacitor group C3 is put between U3, W1, and capacitor group C2 is put between V1, W2, is put between V2, W3
Capacitor group C5 puts into capacitor group C6 between U4, W4.
The sensor includes voltage detecting sensor, current sensor and/or power-factor meter.
The PLC controller is connect with data input module, display module respectively.
It is connected between the PLC controller and sensor by RS232 communicating circuit.
The PLC controller is connect with gear conversion waved switch.
The PLC controller is connect with alarm, predetermined power factor standard value in the PLC controller, the PLC control
Device and delayer processed.
The present invention has the advantages that the automatic control for capacitor switching is realized by detection data, to meet double
The variation of two kinds of gears of coil connected furnace, to preferably adapt to connected furnace so that its at work the alternate balance of electric current and
Compensate power factor.
Detailed description of the invention
Below to each width attached drawing of description of the invention expression content and figure in label be briefly described:
Fig. 1 is prior art connecting line construction figure；
Fig. 2 is prior art line schematic diagram；
Fig. 3 is compensation device structure principle chart of the present invention；
Fig. 4 is the control principle schematic diagram of compensation device of the present invention.
Specific embodiment
A specific embodiment of the invention is made further detailed below against attached drawing by the description to optimum embodiment
Thin explanation.
As shown in Figure 3,4, be realize it is a kind of can satisfy horizontal continuous casting equipment fusing and heat preservation two kinds of working methods it is " double
Coil line-frequency induction connected furnace static balancing, dynamic compensating device ", avoiding smelting-casting equipment, there are the alternate mistakes of supply current when powering
Weighing apparatus and the phenomenon that power factor is relatively low or overcompensation.Including sensor, PLC controller, actuator controller, sensor is used for
The parameter of three-phase electricity is acquired, output end connect with PLC controller, the output end of PLC controller and actuator controller
Input terminal connection, the output end of actuator controller are connect with multiple contactors, each corresponding control one of the contactor
Group compensating capacitor switching, the supplement capacitor is for compensating three-phase electricity.
Sensor includes voltage detecting sensor, current sensor and/or power-factor meter.PLC controller and sensor it
Between connected by RS232 communicating circuit.
Compensation capacitor include six groups of compensating electric capacities be respectively connected to power supply, wherein between U1, V1 put into capacitor group C4, U2,
Capacitor group C1 is put between V2, capacitor group C3 is put between U3, W1, capacitor group C2 is put between V1, W2, and electricity is put between V2, W3
Container group C5 puts into capacitor group C6 between U4, W4.
PLC controller is connect with data input module, display module respectively.Actuator controller can use single-chip microcontroller
It realizes, the closure for control contactor is opened, and data input module, display module can be using touching display screens come reality
It is existing, facilitate the input and display of data.Display data include power factor, active and reactive etc., its working principle is that: pass through biography
Sensor acquires the data such as three-phase voltage, electric current, power factor to PLC controller respectively, PLC controller can by display into
Then row display facilitates monitoring personnel to carry out the switching of operation control capacitor according to the data of display manually, such as passes through touch-control
Shield input signal, corresponding contactor is then driven by execution controller, and then control corresponding capacitor switching.Certainly, PLC is controlled
Device processed can control corresponding switching according to collected power factor size, the lesser two-phase electricity of the power factor detected
Corresponding capacitor switching.When manually controlling, PLC controller and gear conversion waved switch are connect, by gear waved switch come
Realize control for switching, the switching of the corresponding contactor of each gear enters, such control switch come realize for
The control of different capacitors switching.
PLC controller is connect with alarm, predetermined power factor standard value in PLC controller, the PLC controller with prolong
When device.Power factor standard value is preset in the ROM of PLC, when emergent power factor does not fluctuate, starts to control delayer
Delayed startup, if power factor restores normal before delay terminates, PLC controller controls delayer and stops delay, if being delayed
At the end of, still without back to normal, then illustrate that the compensation device for manually controlling or automatically controlling switching goes wrong, this
When need and alarm, alarm is realized by alarm, buzzer can be used to realize.
Sampling can be measured with the automatic control dynamic passive compensation system of single-phase monitoring by using, logical by RS232
Signal, is delivered to the control PLC controller of horizontal casting, will execute instruction after being analyzed by PLC and feed back to idle benefit by news
Automatic controller (executing controller) is repaid, monitors active power, reactive power, power factor etc. at runtime, and according to sampling
The switching of value and set value calculation filtering compensation branch is to achieve the purpose that compensating reactive power.There are two types of in the use process of equipment
Mode is controlled, and conventional method is to set relevant parameter on automatic compensating controller according to equipment situation to transport automatically
Row.It or is the investment and excision of control compensation branch in a manual mode for control function, and examined using imitation-system measuring apparatus
Whether survey can reach expected requirement.
It is equipped with multiple groups between the three-phase alternating current of input smelting-casting equipment and three enough dynamic phase compensation capacitors, often
Group compensating electric capacity is respectively equipped with a contactor and electric discharge device to two-phase power supply while switching, the three-phase alternating current of equipment power supply
In electricity, one group of three-phase power capacitor by contactor control switching is additionally provided with for idle phase splitting compensation.Compensation device is also set
There are three-phase voltage meter and power-factor meter.Six groups of sufficient amount of compensating electric capacities are respectively connected to power supply, wherein between U1, V1
Capacitor group C4 is put into, capacitor group C1 is put between U2, V2, capacitor group C3 is put between U3, W1, capacitor is put between V1, W2
Group C2, puts into capacitor group C5 between V2, W3, capacitor group C6 is put between U4, W4.
The advantages of the invention patent orderliness it is clear, it is compact-sized, easy for installation, using simple and clear, maintenance is convenient, just
In popularization, power factor and three-phase balance in equipment running process can be made to work in optimum state, timely and effective improvement
Because smelting-casting equipment is converted to three-phase current power supply caused when the soak voltage state of different stalls by melting voltage status
The problem that electric current is alternate unbalance and power factor is relatively low, and improve compensation when be likely to occur overcompensation the problem of.
Multiple groups compensating electric capacity is equipped between the three-phase alternating current of access smelting-casting equipment, every group of compensating electric capacity is respectively equipped with one
Group is used for the automatic switching of power factor to the contactor of three phase mains while switching, and every group of compensating electric capacity through dedicated respectively by connecing
Tentaculum KMl, KM2, KM3 access power supply three phase mains, and to three phase mains, switching compensating electric capacity is carried out simultaneously respectively by contactor
Dynamic compensates, meanwhile, one group is additionally provided between every two-phase power supply in three-phase alternating current by automatic control reactive compensation system control
The compensating electric capacity of automatic or manual switching processed.One group is additionally provided with by connecing between every two-phase power supply in power supply three-phase alternating current system
The compensating electric capacity of tentaculum KM4, KM5, KM6 control switching.Capacitor group C4 is put between above-mentioned U1, V1, and capacitor is put between U2, V2
Group C1, puts into capacitor group C3 between U3, W1, capacitor group C2 is put between V1, W2, and capacitor group C5, U4, W4 are put between V2, W3
Between put into capacitor group C6.The capacity that compensating electric capacity in each power supply is reasonably distributed by the above multiple groups, in smelting-casting equipment work
According under the different operating conditions of smelting-casting equipment work in work, and pass through the monitoring to three-phase electricity flow table and power-factor indicator.
Except adjust automatically platform is intervened by the PLC under automatic mode, when being adjusted using manual mode, station is utilized
On nine multi gear positions conversion toggle switch control contactor switching mend power capacitor.
Obviously present invention specific implementation is not subject to the restrictions described above, as long as using method concept and skill of the invention
The improvement for the various unsubstantialities that art scheme carries out, it is within the scope of the present invention.
Claims (7)
1. a kind of power factor compensation device of connected furnace, it is characterised in that: including sensor, PLC controller, executing agency's control
Device processed, the sensor are used to acquire the parameter of three-phase electricity, and output end is connect with PLC controller, the PLC controller it is defeated
The connection of the input terminal of outlet and actuator controller, the output end of the actuator controller are connect with multiple contactors,
One group of compensating capacitor switching of each corresponding control of the contactor, the supplement capacitor is for mending three-phase electricity
It repays.
2. a kind of power factor compensation device of connected furnace as described in claim 1, it is characterised in that: the compensation capacitor
It is respectively connected to power supply including six groups of compensating electric capacities, capacitor group C4 is wherein put between U1, V1, capacitor group C1 is put between U2, V2,
Capacitor group C3 is put between U3, W1, capacitor group C2 is put between V1, W2, and capacitor group C5 is put between V2, W3, is put between U4, W4
Capacitor group C6.
3. a kind of power factor compensation device of connected furnace as described in claim 1, it is characterised in that: the sensor includes
Voltage detecting sensor, current sensor and/or power-factor meter.
4. such as the power factor compensation device of any connected furnace of claim 1-3, it is characterised in that: the PLC controller point
It is not connect with data input module, display module.
5. a kind of power factor compensation device of connected furnace a method according to any one of claims 1-3, it is characterised in that: the PLC
It is connected between controller and sensor by RS232 communicating circuit.
6. a kind of power factor compensation device of connected furnace a method according to any one of claims 1-3, it is characterised in that: the PLC
Controller is connect with gear conversion waved switch.
7. a kind of power factor compensation device of connected furnace a method according to any one of claims 1-3, it is characterised in that: the PLC
Controller is connect with alarm, predetermined power factor standard value in the PLC controller, the PLC controller and delayer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910308740.4A CN109995048A (en) | 2019-04-17 | 2019-04-17 | A kind of power factor compensation device of connected furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910308740.4A CN109995048A (en) | 2019-04-17 | 2019-04-17 | A kind of power factor compensation device of connected furnace |
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| Publication Number | Publication Date |
|---|---|
| CN109995048A true CN109995048A (en) | 2019-07-09 |
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ID=67133995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910308740.4A Pending CN109995048A (en) | 2019-04-17 | 2019-04-17 | A kind of power factor compensation device of connected furnace |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2295288Y (en) * | 1997-03-28 | 1998-10-21 | 重庆亚能电器有限责任公司 | Reactive power automatic compensating box for civil buildings |
| CN202276152U (en) * | 2011-10-17 | 2012-06-13 | 安徽精诚铜业股份有限公司 | Compensation device used for power factor of power frequency induction melting furnace |
-
2019
- 2019-04-17 CN CN201910308740.4A patent/CN109995048A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2295288Y (en) * | 1997-03-28 | 1998-10-21 | 重庆亚能电器有限责任公司 | Reactive power automatic compensating box for civil buildings |
| CN202276152U (en) * | 2011-10-17 | 2012-06-13 | 安徽精诚铜业股份有限公司 | Compensation device used for power factor of power frequency induction melting furnace |
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