CN208862571U - The filtering system of the can-type calcine furnace of temperature can be automatically adjusted - Google Patents
The filtering system of the can-type calcine furnace of temperature can be automatically adjusted Download PDFInfo
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- CN208862571U CN208862571U CN201821301740.9U CN201821301740U CN208862571U CN 208862571 U CN208862571 U CN 208862571U CN 201821301740 U CN201821301740 U CN 201821301740U CN 208862571 U CN208862571 U CN 208862571U
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- frequency converter
- filter
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- filter branch
- filtering system
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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
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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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Abstract
The utility model relates to a kind of filtering systems, more particularly to a kind of filtering system for the can-type calcine furnace that can automatically adjust temperature.Divide column power supply system, LC passive filtering system to exchange reactance system with frequency converter by load to constitute, load divides column power supply system to be isolating transformer, isolating transformer is connected on bus, and nonlinear load side bus is isolated with normal linear load feeder assembly, five filter branch and seven filter branch of LC passive filtering system are connected in parallel on the bus bar side in all frequency converter nonlinear loads circuit, and reactor is connected on the formation that harmonic current is further suppressed between each frequency converter and blower by frequency converter exchange reactance system.The utility model has the advantages of: the utility model selects five filter branch and seven filter branch, cope with the major harmonic source of such can-type calcine furnace system, with strong points, passive filter small investment, operational reliability are higher, operating cost is lower, and filter effect is obvious.
Description
Technical field
The utility model relates to a kind of filtering systems, more particularly to a kind of filter for the can-type calcine furnace that can automatically adjust temperature
Wave system system.
Background technique
In the power system, with the continuous popularization and application of power electronic technique, the rectification such as frequency converter, UPS, Switching Power Supply
Equipment has become the important component of factory load, and the voltage and current waveform of electric system occurs for this kind of nonlinear-load
Distortion, cause occur a large amount of higher hamonic wave in power grid, seriously reduce power quality, threatened electric system safety,
Economical operation.
The can-type calcine furnace that temperature can be automatically adjusted is different from traditional kettle style calcining furnace, and only the negative pressure by each fire channel is passive
Traction combustion air enter quirk, but PLC system is applied to calcine the feedbacks of the signals such as furnace temperature, pressure, control according to each group
Frequency conversion fan processed forges every pot type actively to the combustion-supporting volatile matter of pot type burner injection of overfire air in reasonable burning zone full combustion
Burn the equipment that furnace can automatically adjust temperature.Since the general multiple groups of can-type calcine furnace work side by side, requirement of each group furnace body to temperature control
It is different, therefore every group of calcining furnace need to be equipped with blower and carry out temperature control, therefore can introduce a large amount of variable-frequency motors, lead to power grid
Nonlinear-load improves, and harmonic component ratio increases.
Summary of the invention
To solve the above problems, the utility model provides a kind of filtering system of can-type calcine furnace that can automatically adjust temperature
System, it is therefore an objective to which the harmonic wave for reducing frequency converter generation damages caused by electrical equipment and power grid, improves the standard that measuring instrumentss are measured
The reliability of true property and protective relaying device movement.
In order to achieve the above object, the utility model can automatically adjust the filtering system of the can-type calcine furnace of temperature, by load point
Column power supply system, LC passive filtering system exchange reactance system composition with frequency converter, and load divides column power supply system for isolation transformation
Device, isolating transformer is connected on bus, and nonlinear load side bus is isolated with normal linear load feeder assembly, and LC is passive
Five filter branch and seven filter branch of filtering system are connected in parallel on the bus bar side in all frequency converter nonlinear loads circuit, become
Reactor is connected on the formation that harmonic current is further suppressed between each frequency converter and blower by frequency device exchange reactance system.
Five filter branch and seven filter branch filter condensers, filter reactors are composed in series.
Five filter branch and the filter housing in seven filter branch and shell of frequency converter are connected to simultaneously
In grounded screen.
The capacity of each filter is calculated according to following formula:,, load capacity SL , power-factor angle is Φ 1 before compensation, compensates it
Target power factor angle is Φ 2, Q afterwardscFor reactive capability.
The utility model has the advantages of: the utility model selects five filter branch and seven filter branch, copes with this
The major harmonic source of class can-type calcine furnace system, with strong points, passive filter small investment, operational reliability be higher, running cost
With lower, filter effect is obvious.While filtering out harmonic wave, the effect of reactive compensation is also had both, power factor can be improved, is stablized
Busbar voltage reduces non-equilibrium among three phase voltages, and the harmonic controling that frequency converter is generated reaches inhibition power grid in minimum zone
Pollution, improves the purpose of power quality.
Detailed description of the invention
Fig. 1 is the circuit diagram of the utility model.
Fig. 2 is the schematic diagram in frequency converter nonlinear load circuit.
In figure: 1, load divides column power supply system；2, LC passive filtering system；3, frequency converter exchanges reactance system；4, non-thread
Property load side bus；5, five filter branch；6, seven filter branch；7, frequency converter nonlinear load circuit；8, frequency converter；9,
Blower；10, AC reactor；11, normal linear loads feeder assembly；12, filter reactor；13, filter condenser.
Specific embodiment
It is illustrated below in conjunction with preferred embodiment of the attached drawing to the utility model, it should be understood that described herein excellent
It selects embodiment to be only used for describing and explaining the present invention, is not used to limit the utility model.
As shown, the utility model can automatically adjust the filtering system of the can-type calcine furnace of temperature, supplied by load point column
Electric system 1, LC passive filtering system 2 exchange the composition of reactance system 3 with frequency converter, and load divides column power supply system 1 for isolation transformation
Device, isolating transformer is connected on bus, and nonlinear load side bus 4 and normal linear load feeder assembly 11 are isolated, LC without
Five filter branch 5 and seven filter branch 6 of source filtering system 2 are connected in parallel on the mother in all frequency converter nonlinear loads circuit 7
Line side, frequency converter exchange reactance system 3 reactor 10 is connected between each frequency converter 8 and blower 9 further suppress it is humorous
The formation of wave electric current.
Five filter branch 5 and seven filter branch 6 are composed in series by filter condenser 13, filter reactor 12.
The structure and the mode of connection of five filter branch 5 and seven filter branch 6 are completely the same, only in filtered electrical
Container 13, filter reactor 12 parameter on difference.Using L, C resonance principle, under ideal tuning state
, enable five times, the seventh harmonic impedance magnitude it is equal with harmonic wave resistance sizes, by frequency converter nonlinear load circuit 7 formed to five
Secondary, seven secondary frequencies harmonic waves impedance paths make five times, the seventh harmonic electric current inflow five filter branch, 5, seven filter branch
It is avoided to be flowed into other parts in 6, to achieve the purpose that filter out five times, the seventh harmonic.
Five filter branch 5 and the filter housing in seven filter branch 6 and shell of frequency converter connect simultaneously
Into grounded screen.
The capacity of each filter is calculated according to following formula:
,, load capacity SL , mend
Power-factor angle is Φ 1 before repaying, and target power factor angle is Φ 2, Q after compensationcFor reactive capability.
Load divide column power supply system purpose be the nonlinear load route of generation harmonic wave with to the sensitive instrument of harmonic wave,
The linear loads route point column power supply such as comprehensive guarantor.Distortion current caused by nonlinear load can be generated in the impedance of cable one it is abnormal
Power transformation pressure drop, and the distorted voltage waveform synthesized can cause harmonic wave when being applied in the other loads connect with this same route
Electric current flows through on it.Isolating transformer is arranged from same power interface point in inverter load and sensitive linear load by selection
Divide column power supply, the distorted voltage that inverter load can be stopped to generate in this way will not be transmitted to linear load up.Frequency conversion simultaneously
Device out-put supply as far as possible far from control cable laying, wear steel pipe and lay and steel pipe is made electrical communication and can be abutted against by output cable
Ground.
Passive filtering system is the core of the utility model, the characteristics of for this can-type calcine furnace nonlinear load
(fan frequency converter is pulsed with three-phase six based on full-wave rectification), according to formula: major harmonic number K=6N1 it is found that frequency converter
The harmonic wave of generation is accounted for 90% of total harmonic distortion or more, therefore is selected five times, seven single tuned filters based on five times, seven times
It forms five filter branch and seven filter branch is in parallel with frequency converter nonlinear load circuit, while filter housing and frequency conversion
Device shell need to be reliably connected in grounded screen simultaneously, can be reduced contact resistance in this way, improve filter effect.
Computing system first needs the reactive capability compensated is how many, and how to be allocated in each filter.
If load capacity is SL , power-factor angle is Φ 1 before compensation, and target power factor angle is Φ 2 after compensation, then needing to filter
Wave device come the reactive capability that compensates then are as follows:
, since this system five, the seventh harmonic are the most serious, therefore select
It selects two sets of single tuned filters of installation and filters out both harmonic waves respectively, distribute formula by capacity:
, the capacity that each filter should configure can be calculated.
It is that AC reactor is added between frequency converter and blower to inhibit harmonic current that frequency converter, which exchanges reactance system,
It is formed, also can protect rectifier bridge is not influenced by supply voltage moment sharp wave.Simultaneously because the electricity between motor and frequency converter
For cable there are distribution capacity, frequency converter modulated square wave after inversion exports can generate certain overvoltage on circuit, make blower without
Method operates normally, and output reactance device is connected between frequency converter and blower also can effectively inhibit the appearance of this overvoltage.
Claims (3)
1. the filtering system of the can-type calcine furnace of temperature can be automatically adjusted, it is characterised in that by load divide column power supply system, LC without
Source filtering system exchanges reactance system composition with frequency converter, and load divides column power supply system to be isolating transformer, isolating transformer string
It is associated on bus and nonlinear load side bus is isolated with normal linear load feeder assembly, five filters of LC passive filtering system
Wave branch and seven filter branch are connected in parallel on the bus bar side in all frequency converter nonlinear loads circuit, and frequency converter exchanges reactance system
Reactor is connected on to the formation that harmonic current is further suppressed between each frequency converter and blower.
2. the filtering system of the can-type calcine furnace according to claim 1 for automatically adjusting temperature, it is characterised in that described
Five filter branch and seven filter branch are composed in series by filter condenser, filter reactor.
3. the filtering system of the can-type calcine furnace according to claim 1 for automatically adjusting temperature, it is characterised in that five times
Filter branch and filter housing in seven filter branch and shell of frequency converter are connected in grounded screen simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821301740.9U CN208862571U (en) | 2018-08-14 | 2018-08-14 | The filtering system of the can-type calcine furnace of temperature can be automatically adjusted |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821301740.9U CN208862571U (en) | 2018-08-14 | 2018-08-14 | The filtering system of the can-type calcine furnace of temperature can be automatically adjusted |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208862571U true CN208862571U (en) | 2019-05-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821301740.9U Active CN208862571U (en) | 2018-08-14 | 2018-08-14 | The filtering system of the can-type calcine furnace of temperature can be automatically adjusted |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208862571U (en) |
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2018
- 2018-08-14 CN CN201821301740.9U patent/CN208862571U/en active Active
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