CN104767203A - Harmonic wave control system for copper strip rolling machine - Google Patents
Harmonic wave control system for copper strip rolling machine Download PDFInfo
- Publication number
- CN104767203A CN104767203A CN201510208272.5A CN201510208272A CN104767203A CN 104767203 A CN104767203 A CN 104767203A CN 201510208272 A CN201510208272 A CN 201510208272A CN 104767203 A CN104767203 A CN 104767203A
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- China
- Prior art keywords
- harmonic wave
- harmonic
- copper strip
- rolling machine
- control system
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Classifications
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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
- H02J3/01—Arrangements for reducing harmonics or ripples
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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
- Y02E40/40—Arrangements for reducing harmonics
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The invention discloses a harmonic wave control system for a copper strip rolling machine. A power source supplies power to rolling machine equipment and an equipment main engine, a harmonic wave regulating circuit is connected with a power supply circuit of the power source through switches, the control system is provided a collecting circuit, the collecting circuit collects current and voltage signals of the rolling machine equipment, the equipment main engine and the output end of the harmonic wave regulating circuit, the collecting circuit transmits the collected signals to a processing unit, and the processing unit outputs control signals to the switches. Aiming at the operational shortcomings of copper processing reversible rolling machines in the industry, the harmonic wave control system for the rolling machine conducts harmonic wave control, and the harmonic wave control effect generated for direct current speed regulation is good.
Description
Technical field
The present invention relates to copper strip mill field, particularly relating to the system for recuperating under medical treatment copper strip mill harmonic problem.
Background technology
Copper plate/strip milling train because of unit direct current speeder power many at about 800KW, what generally adopt is 440V DC Motor Drives, power supply mostly is and exchanges 380V direct-furnish, characteristic because of rolling determines milling train and there will be climbing phenomenon in the process of rolling, can directly cause direct current machine to occur the running status of low speed big current.Low speed big current then can cause the sine wave of 380 power supplies to occur resonance, produces a large amount of odd harmonics and causes following drawback: 1, directly impact the safety of each electric equipment in electrical network and directly cause the reduction of power factor of electric network.2, interference is contiguous power electronic equipment, industrial control equipment and communication apparatus, affect the normal operation of equipment.3, harmonic wave becomes the rate of change and the peak value that change voltage or electric current, delays arc extinction, affects the breaking capacity of circuit breaker; 4, strengthen line loss, make cable overheated, accelerate ageing of insulation.5, reduce power-efficient, cause the series of problems such as three-phase imbalance.
Settling mode at present for this problem is few, adopts in the industry the modes such as high-voltage motor drives, boosting power supply more, reduces generation ofharmonic to reduce the impact to electric equipment by the mode improving electric pressure reduction operating current.Because a set of high-low pressure needing to increase separately power supply becomes the equipment such as power distribution cabinet and transformer, the large and occupied ground of investment, the problem such as difficult in maintenance, expense is large.
Summary of the invention
Technical problem to be solved by this invention realizes a kind of structure milling train harmonic treatment system simple, with low cost.
To achieve these goals, the technical solution used in the present invention is: a kind of copper strip mill harmonic treatment system, power supply is powered to milling equipment and device Host, the supply line of described power supply is connected with harmonic wave regulating circuit by switch, this governing system is provided with the Acquisition Circuit of current and voltage signals gathering milling equipment, device Host, harmonic wave regulating circuit output, the signal of collection is delivered to processing unit by described Acquisition Circuit, and described processing unit exports control signal to switch.
Described harmonic wave regulating circuit is provided with inverter bridge, and described inverter bridge is connected with switch by connecting reactance, and described inverter bridge is provided with direct current capacitor, and high pass filter is by inrush current prevention electronics access switch and connect between reactance.
Voltage signal on described collection current acquisition direct current capacitor.
Milling train harmonic treatment system of the present invention runs drawback for Copper fabrication reversable mill in industry, carries out harmonic wave control, and the harmonic controling produced DC speed regulation is respond well.
Accompanying drawing explanation
Below the content that width accompanying drawing every in specification of the present invention is expressed is briefly described:
Fig. 1,2 is copper strip mill harmonic treatment system schematic diagram.
Embodiment
The present invention carries out harmonic wave control mainly for the milling train completing Installation and Debugging, so can not directly adjust in its original electric power system, that is will try every possible means to administer when not touching original system built-in function and line arrangement.Administer thus and will meet inside and outside three basic problem needs and solve.1, controlling device must be administered single direct current speeder on the spot, does not have an impact to the equipment in other system.2, controlling device needs corresponding speed and very strong specific aim faster.3, the operation of abatement equipment reliable and stable, have and administer continuously and the ability of Dynamic control tracking measurement.
As shown in Figure 2, the power supply of copper strip mill equipment is powered to milling equipment and device Host, milling equipment and direct current machine, direct current speeder etc., device Host is the control rack of copper strip mill, for regulating harmonic wave, in the supply line of power supply, can connect harmonic wave regulating circuit by switch, harmonic wave regulating circuit can be intelligent electric power filter, and switch is the switching device regulating intelligent electric power filter whether to access.
As shown in Figure 2, governing system is provided with the Acquisition Circuit of current and voltage signals gathering milling equipment, device Host, harmonic wave regulating circuit output, and the signal of collection is delivered to processing unit by Acquisition Circuit, and exports control signal by processing unit to switch.Processing unit is utilized to control the access opportunity of harmonic wave regulating circuit.
The processing method of processing unit is conventional switching processor, utilizes the current signal measuring gained to carry out the process of harmonic wave separation algorithm, obtains harmonic reference signal, and carry out difference comparsion, send switching order.
For improving the regulating power of harmonic wave regulating circuit, harmonic wave regulating circuit structure is as follows, and it is provided with inverter bridge, and inverter bridge is connected with switch by connecting reactance, inverter bridge is provided with direct current capacitor, and high pass filter is by inrush current prevention electronics access switch and connect between reactance.In addition gather the voltage signal on current acquisition direct current capacitor, as feedback signal, thus export corresponding each harmonic component and amount of unbalance, realize abatement functions.
Operation principle: first the control system of equipment obtains the signal such as system power, DC capacitor voltage after connecing voltage, load current, equipment output current, compensation by measuring circuit.The current signal measuring gained is utilized to carry out the process of harmonic wave separation algorithm, obtain harmonic reference signal, as modulation signal, compared with triangular wave, thus obtain switching signal, go to control single-phase bridge by this switching signal, according to the principle of technology, by the switching signal reversal connection of upper and lower bridge arm, just can obtain the harmonic current contrary with harmonic signal equal and opposite in direction on line, direction, the harmonic current on line is balanced out.This is feed-forward control portion.Again the harmonic component of electric current on the line after active filter access point is fed back, as the input of adjuster, the error of adjustment feedfoward control, thus export corresponding each harmonic component and amount of unbalance, realize abatement functions.
Above by reference to the accompanying drawings to invention has been exemplary description; obvious specific implementation of the present invention is not subject to the restrictions described above; as long as have employed the improvement of the various unsubstantialities that method of the present invention is conceived and technical scheme is carried out; or design of the present invention and technical scheme directly applied to other occasion, all within protection scope of the present invention without to improve.
Claims (3)
1. a copper strip mill harmonic treatment system, power supply is powered to milling equipment and device Host, it is characterized in that: the supply line of described power supply is connected with harmonic wave regulating circuit by switch, this governing system is provided with the Acquisition Circuit of current and voltage signals gathering milling equipment, device Host, harmonic wave regulating circuit output, the signal of collection is delivered to processing unit by described Acquisition Circuit, and described processing unit exports control signal to switch.
2. copper strip mill harmonic treatment system according to claim 1, it is characterized in that: described harmonic wave regulating circuit is provided with inverter bridge, described inverter bridge is connected with switch by connecting reactance, described inverter bridge is provided with direct current capacitor, and high pass filter is by inrush current prevention electronics access switch and connect between reactance.
3. copper strip mill harmonic treatment system according to claim 2, is characterized in that: the voltage signal on described collection current acquisition direct current capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510208272.5A CN104767203A (en) | 2015-04-28 | 2015-04-28 | Harmonic wave control system for copper strip rolling machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510208272.5A CN104767203A (en) | 2015-04-28 | 2015-04-28 | Harmonic wave control system for copper strip rolling machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104767203A true CN104767203A (en) | 2015-07-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510208272.5A Pending CN104767203A (en) | 2015-04-28 | 2015-04-28 | Harmonic wave control system for copper strip rolling machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104767203A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04334976A (en) * | 1991-05-09 | 1992-11-24 | Hitachi Ltd | Inverter and drive system for ac motor |
| JP3352182B2 (en) * | 1993-11-09 | 2002-12-03 | 三菱電機株式会社 | Inverter device |
| CN2527016Y (en) * | 2002-01-11 | 2002-12-18 | 张玉良 | Hybrid reactive power generator |
| CN101075742A (en) * | 2007-04-13 | 2007-11-21 | 东南大学 | Network harmonic and flash comprehensive inhibitor |
| CN201868879U (en) * | 2010-11-23 | 2011-06-15 | 国网南自控股（杭州）有限公司 | Complete device special for filtering compensation of rolling mill |
| CN102570476A (en) * | 2011-12-31 | 2012-07-11 | 浙江大学 | Repetitive-control-based method for controlling compensation current of DSTATCOM (Distribution Static Synchronous Compensator) |
-
2015
- 2015-04-28 CN CN201510208272.5A patent/CN104767203A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04334976A (en) * | 1991-05-09 | 1992-11-24 | Hitachi Ltd | Inverter and drive system for ac motor |
| JP3352182B2 (en) * | 1993-11-09 | 2002-12-03 | 三菱電機株式会社 | Inverter device |
| CN2527016Y (en) * | 2002-01-11 | 2002-12-18 | 张玉良 | Hybrid reactive power generator |
| CN101075742A (en) * | 2007-04-13 | 2007-11-21 | 东南大学 | Network harmonic and flash comprehensive inhibitor |
| CN201868879U (en) * | 2010-11-23 | 2011-06-15 | 国网南自控股（杭州）有限公司 | Complete device special for filtering compensation of rolling mill |
| CN102570476A (en) * | 2011-12-31 | 2012-07-11 | 浙江大学 | Repetitive-control-based method for controlling compensation current of DSTATCOM (Distribution Static Synchronous Compensator) |
Non-Patent Citations (2)
| Title |
|---|
| 周志敏等: "《逆变电源实用技术-设计于应用》", 31 March 2005 * |
| 江俊敏: "基于PEBB的并联有源电力滤波器在立辊轧机中应用", 《电力自动化设备》 * |
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Application publication date: 20150708 |