CN104269851B - A kind of iterated electrical filter - Google Patents
A kind of iterated electrical filter Download PDFInfo
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- CN104269851B CN104269851B CN201410568434.1A CN201410568434A CN104269851B CN 104269851 B CN104269851 B CN 104269851B CN 201410568434 A CN201410568434 A CN 201410568434A CN 104269851 B CN104269851 B CN 104269851B
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- 230000005611 electricity Effects 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 17
- 230000003321 amplification Effects 0.000 abstract description 14
- 238000001914 filtration Methods 0.000 abstract description 14
- 238000003199 nucleic acid amplification method Methods 0.000 abstract description 14
- 230000009897 systematic effect Effects 0.000 abstract description 4
- 238000001228 spectrum Methods 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 238000013016 damping Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000001939 inductive effect Effects 0.000 description 3
- 206010033307 Overweight Diseases 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 235000020825 overweight Nutrition 0.000 description 2
- 238000009845 electric arc furnace steelmaking Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 230000001932 seasonal effect Effects 0.000 description 1
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
-
- 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
Abstract
One iterated electrical filter of the present invention, belong to electric and electronic technical field, the feature that this filter circuit configuration has that filtered spectrum is extensive, filtering compensation is effective, Harmonics amplification does not occur, energy consumption own is low, when systematic parameter is produced deviation by circular temperature loads, such as system frequency, the electric capacity in wave filter, inductance, the filter effect of this wave filter also will not be affected by, this device, in terms of administering power system filtering pollution, has great effect.
Description
Technical field
The invention belongs to electric and electronic technical field, be specifically related to a kind of iterated electrical filter.
Background technology
At present, owing to the application of power electronic equipment is more prevalent, the harmonic wave numerical value that industry, appliance load produce is big, and frequency spectrum divides
Cloth is the most extensive, not only has 3,5,7,11 common subharmonic, also has the no small even-order harmonic of numerical value and until the height of 47 times
Subharmonic, causes filter circuit cost to improve, and power consumption is big；Additionally, existing filter circuit, when systematic parameter is (such as system frequency
Rate, the electric capacity in wave filter and inductance) due to seasonal temperature change produce deviation time, filter effect can be affected.
Summary of the invention
For the shortcoming of prior art, the present invention proposes a kind of iterated electrical filter, filters reaching effective, economical, energy-conservation
Except harmonic wave, improve the purpose of filtering compensation effect.
A kind of iterated electrical filter, including n electric capacity, n inductance and n-1 noninductive resistance, wherein, one end phase of all electric capacity
Connecting, one end of all inductance is connected, and the other end correspondence of each electric capacity connects the other end of an inductance, forms n
Bar series arm；Described noninductive resistance is arranged between adjacent two series arms, i.e. noninductive resistance one end is connected to a string
Electric capacity and the intersection point of inductance in connection branch road, the noninductive resistance other end is connected to electric capacity and the intersection point of inductance in adjacent series arm.
Described n is integer, value according to the actual requirements depending on.
Being 400KVA when being applied to a capacity, no-load voltage ratio is 10KV/0.4KV, the transformator of short-circuit impedance UK=0.04, and this change
When depressor is connected in the 10KV network that capacity of short circuit is 100MVA, put into 2 groups of 4 iterated electrical filters, this iterated electrical filter
Each parameter is as follows:
Table 1
Table 2
Table 3
Table 4
Table 5
Being 1200KVA when being applied to a capacity, no-load voltage ratio is 10KV/0.4KV, the transformator of short-circuit impedance UK=0.046, and this change
When depressor is connected on the 10KV network that capacity of short circuit is 100MVA, put into 3 groups of 2 iterated electrical filters, 2 groups of 3 chain types filtering
Device and 6 groups of 4 iterated electrical filters, each parameter of iterated electrical filter is as follows:
Table 6
Table 7
Table 8
Table 9
Being 20000KVA when being applied to a capacity, no-load voltage ratio is 110KV/35KV, the transformator of short-circuit impedance UK=0.05, and this change
When depressor is connected on the 110KV network that capacity of short circuit is 750MVA, putting into 2 groups of 3 iterated electrical filters, iterated electrical filter parameter is such as
Under:
Table 10
Table 11
Table 12
Table 13
The invention have the advantages that
One iterated electrical filter of the present invention, this filter circuit configuration has that filtered spectrum is extensive, filtering compensation is effective, does not sends out
Raw Harmonics amplification, the feature that energy consumption own is low, when systematic parameter is produced deviation by circular temperature loads, such as system frequency,
Electric capacity in wave filter, inductance, the filter effect of this wave filter also will not be affected by, and this device is administering power system filtering
Pollution aspect, has great effect.
Accompanying drawing explanation
Fig. 1 is the iterated electrical filter structured flowchart of the present invention；
Fig. 2 is 4 iterated electrical filter structured flowcharts of the embodiment of the present invention 1；
After Fig. 3 is 4 iterated electrical filters of access of the embodiment of the present invention 1, supply transformer Harmonics amplification coefficient and overtone order
Relation schematic diagram；
Fig. 4 is design sketch after 2 groups of 4 iterated electrical filters of the embodiment of the present invention 2 put into；
Fig. 5 is 3 groups of 2 iterated electrical filters of the embodiment of the present invention 3,2 groups of 3 iterated electrical filters and 6 groups of 4 chain types filtering
Design sketch after device input；
Fig. 6 is design sketch after 2 groups of 3 iterated electrical filters of the embodiment of the present invention 4 put into；
Fig. 7 is the impedance frequency characteristic schematic diagram of 2 groups of 3 iterated electrical filters of the embodiment of the present invention 4, and wherein, curve is filter
The impedance of ripple device, oblique line is system impedance；
Fig. 8 is the frequency characteristic schematic diagram of the amplification coefficient of 2 groups of 3 iterated electrical filters of the embodiment of the present invention 4, wherein, and figure
A () is the frequency characteristic of the amplification coefficient of first group of 3 iterated electrical filter, figure (b) is second group of 3 iterated electrical filter
The frequency characteristic of amplification coefficient.
Detailed description of the invention
Below in conjunction with the accompanying drawings an embodiment of the present invention is described further.
As it is shown in figure 1, iterated electrical filter includes n electric capacity, n inductance and n-1 noninductive resistance, wherein, all electric capacity
One end is connected, and one end of all inductance is connected, and the other end correspondence of each electric capacity connects the other end of an inductance,
Form n bar series arm；Described noninductive resistance is arranged between adjacent two series arms, i.e. noninductive resistance one end is connected to
Article one, electric capacity and the intersection point of inductance in series arm, the noninductive resistance other end is connected to electric capacity and the friendship of inductance in adjacent series arm
Point.The harmonic wave distribution obtained according to actual measurement, selects the chain type circuit from 2 to n time, determines C1, C2... Cn, L1, L2... Ln,
R1, R2... Rn-1Parameter, obtain optimum filtering effect.
Embodiment 1
As in figure 2 it is shown, in the embodiment of the present invention, described n is integer, n=4 in the embodiment of the present invention, 4 chain types
Wave filter, is connected to the 0.40KV side of the supply transformer of a 400KVA.The short-circuit impedance of this transformator is 4%, high-pressure side
Capacity of short circuit 100MVA for 10KV, 10KV junction point.It is main that the load of this transformator produces 3,5,7,11,13
Odd harmonic also has a number of 4,6 even-order harmonics.In the embodiment of the present invention, noninductive resistance uses filing date 2011
August 1, Application No.: " a kind of high-power non-inductive wire-wound resistor " of 2011102190967.
After Fig. 3 is for accessing iterated electrical filter, the Harmonics amplification coefficient of this system and the relation of overtone order；Amplification coefficient refers to work as
When harmonic source injects the harmonic current of 1 unit, the harmonic current value of injected system.When amplification coefficient at certain number of times less than 1
Time, representing there is filter action after putting into this filtering system, amplification coefficient is the least, and filter action is the strongest；Exist such as amplification coefficient on the contrary
Certain number of times is more than 1, then it represents that this filtering system amplifies under this number of times, and the biggest amplification of amplification coefficient is the most serious.By
Fig. 3 understands, and iterated electrical filter has good filter effect at characteristic frequency number of times 3,5,7, and at whole frequency domain from 3 times
To 12 times, except 3 times, have Harmonics amplification between 4 times in addition to (actually 3 times, there is not harmonic source between 4 times), all
Present good filter effect, and on principal character harmonic wave 5,7 times, curve is the most smooth.
As shown in the above, when the electric capacity in systematic parameter such as system frequency, wave filter and inductance, by circular temperature loads
And when producing deviation, do not interfere with the filter effect of this wave filter yet, power system filtering pollution administered by this wave filter,
There is great effect.
The practical application effect of the present invention is now proved with three case histories:
Embodiment 2
At this case history, being directed to a capacity is 400KVA, and no-load voltage ratio is 10KV/0.4KV, short-circuit impedance UK=0.04's
Transformator, this transformator is connected on the 10KV network that capacity of short circuit is 100MVA, and its 0.4KV is the rectification load of 6 pulsation,
Active power p=320KW during normal work, reactive power q=310KVAR, produce 3,4,5,6,7,8,9,10,11,
12,13 subharmonic, harmonic current be respectively as follows: 26A, 10.5A, 107A, 8A, 72.2A, 7.5A, 14A, 4.2A,
52.5A, 9A, 45A, cause the voltage resultant distortion rate of 0.4KV bus to reach 8.556%, power factor=0.7182；
In this case history, in order to improve power factor and harmonic carcellation, 2 groups of 4 iterated electrical filters are put into, without electrification
Resistance uses filing date on August 1st, 2011, Application No.: " a kind of high-power non-inductive wire-wound resistor of 2011102190967
Device ".Each device parameters of this iterated electrical filter is as shown in table 1 to table 5；
Table 1
Table 2
Table 3
Table 4
Table 5
As shown in Figure 4, histogram represents that original harmonic current, No. 3 lines are GB permissible value, and No. 2 lines are for putting into above-mentioned 2 groups
Harmonic current after iterated electrical filter, Line 1 bar is the harmonic current flowing into iterated electrical filter；As shown in Figure 4, this chain type filter
Ripple utensil has good filter effect, before not putting into iterated electrical filter, and 3,7,11,13 subharmonic all severe overweights, put into chain
After formula wave filter, the most less than the permissible value of GB GB/T14549-93, this harmonic wave major part is absorbed by wave filter.
In this embodiment, after being put into operation by these 2 groups of iterated electrical filters, effect is as follows:
● the voltage distortion rate of 0.4KV bus is reduced to 2.1266% from 8.556%；
● power factor is risen towards in 1.0 by 0.7182；
● the total current of 0.4KV inlet wire is dropped to 464.12A by 660.46A, have dropped 29.72%；
Total harmonic current is dropped to 45.43A by 150.48A, have dropped 69.8%；
● in damping resistance parameter, loss value is little, illustrates that iterated electrical filter own loss is little；
Embodiment 3
In the present embodiment, certain supply transformer tool parameter is: capacity is 1200KVA, and no-load voltage ratio is 10KV/0.4KV, short-circuit impedance
UK=0.046, is connected on the 10KV network that capacity of short circuit is 100MVA, and its 0.4KV is synthetic load, meritorious during normal work
Power p=816KW, reactive power q=612KVAR, produce from 2 to 25 subharmonic, harmonic current be respectively as follows: 4.3303A,
95.2656A、6.0624A、280.6005A、2.5982A、19.9769A、1.7321A、4.3303A、3.4642A、
116.0508A、2.5982A、85.9122A、3.4642A、6.0624A、1.7321A、60.6236A、3.4642A、
30.8314A、3.4642A、17.7540A、1.7321A、18.4122A、1.7321A、4.8499A；Cause 0.4KV
The voltage resultant distortion rate of bus reaches 9.0386%, power factor=0.80.
In order to improve power factor and harmonic carcellation, in the present embodiment, 3 groups of 2 iterated electrical filters, 2 groups of No. 3 chains are put into
Formula wave filter and 6 groups of 4 iterated electrical filters, total compensation capacity is 607.77KVAR, makes power factor reach 1.0,0.4KV
The voltage resultant distortion rate of bus drops to 3.1972%, and total current is dropped to 1188.05A by 1526.49A, its total harmonic current by
403.16A, drops to 155.47A, decreases 61.43%.
As it is shown in figure 5, histogram shows that original harmonic current, No. 3 lines are GB permissible value, No. 2 lines are for putting into above-mentioned filter
Harmonic current after ripple device, Line 1 bar is the harmonic current flowing into wave filter；As shown in Figure 5, above-mentioned wave filter has good
Filter effect, puts into before wave filter, 5,7,11,13,17 subharmonic all severe overweights, after putting into wave filter, 3,5,7,
11,13,17,19,21,23 subharmonic major parts are absorbed by wave filter, and all harmonic waves are the most less than GB GB/T14549-93
Permissible value.
The parameter of 11 iterated electrical filters of the present embodiment is as shown in table 6 to table 9:
Table 6
Table 7
Table 8
Table 9
In the present embodiment, damping electricity total losses (every phase)=1.6046 [KW]
Embodiment 4
The present embodiment is the filtering system of 35KV, and certain uses the smeltery of electric-arc furnace steelmaking, and the parameter of its supply transformer is: capacity is
20000KVA, no-load voltage ratio is 110KV/35KV, short-circuit impedance UK=0.05, is connected on the 110KV network that capacity of short circuit is 750MVA, its
The load of 35KV bus, active-power P=12000KW, reactive power Q=9000KVAR, power factor=0.80,35KV injects
Harmonic wave be: 2,3,4,5,7 times, it is respectively 18A, 31A, 12A, 16A, 12.5A, causes 35KV bus
Harmonic current all exceedes GB GB limit value, and the humorous resultant distortion rate of 35KV bus reaches 3.78% also above GB GB/T14549-93
Limit value 3%；
In order to improve power factor and harmonic carcellation, having put into 2 groups of 3 iterated electrical filters in the present embodiment, noninductive resistance uses Shen
Please be on August 1st, 2011 day, Application No.: " a kind of high-power non-inductive wire-wound resistor " of 2011102190967；Total benefit
Repaying capacity is 8956.96KVAR, as shown in Figure 6, makes power factor reach 1.0, and the voltage resultant distortion rate of 35KV bus is reduced to
1.6875%, its total harmonic current decreases 50%, makes the harmonic wave of all 2,3,4,5,7 injected systems be both less than GB and is advised
Fixed limit value；In Fig. 6, histogram shows original harmonic current, and No. 3 lines are that GB is filled and is perhaps worth, and No. 2 lines are above-mentioned for putting into
Harmonic current after 2 groups of wave filter, Line 1 bar is the harmonic current flowing into wave filter, puts into before wave filter 2,3,4,5,7
Subharmonic current all exceeds standard, and after 2 groups of 3 iterated electrical filters put into, all harmonic waves are both less than the limit value of GB GB/T14549-93.
As Fig. 7 and Fig. 8 schemed shown in (a) and figure (b), iterated electrical filter required characteristic frequency 2,3,4,5,
Having fine filter action 7 times, and curve is the most smooth at these frequencies, this explanation is when system frequency or filter element parameter
When changing because ambient temperature is different, the impact on filtering effect is little；
The parameter of 2 groups of iterated electrical filters such as table 10 to table 13 in the present embodiment；
Table 10
Table 11
Table 12
Table 13
In the present embodiment, damping electricity total losses (every phase)=6.5739KW；
In conjunction with above-mentioned data, it can be seen that iterated electrical filter, having the most superior filtering and compensation effect, it is for electricity widely
In pressure hierarchical system.
Claims (4)
1. an iterated electrical filter, it is characterised in that: include n electric capacity, n inductance and n-1 noninductive resistance, wherein, all
One end of electric capacity is connected, and one end of all inductance is connected, and the other end correspondence of each electric capacity connects the another of an inductance
One end, forms n bar series arm；Described noninductive resistance is arranged between adjacent two series arms, i.e. noninductive resistance one end
Being connected to electric capacity and the intersection point of inductance in a series arm, the noninductive resistance other end is connected to electric capacity and electricity in adjacent series arm
The intersection point of sense；
Being 400KVA when being applied to a capacity, no-load voltage ratio is 10KV/0.4KV, the transformator of short-circuit impedance UK=0.04, and should
When transformator is connected in the 10KV network that capacity of short circuit is 100MVA, putting into 2 groups of 4 iterated electrical filters, this chain type is filtered
The each parameter of ripple device is as follows:
Table 1
Table 2
Table 3
Table 4
Table 5
2. an iterated electrical filter, it is characterised in that: include n electric capacity, n inductance and n-1 noninductive resistance, wherein, all
One end of electric capacity is connected, and one end of all inductance is connected, and the other end correspondence of each electric capacity connects the another of an inductance
One end, forms n bar series arm；Described noninductive resistance is arranged between adjacent two series arms, i.e. noninductive resistance one end
Being connected to electric capacity and the intersection point of inductance in a series arm, the noninductive resistance other end is connected to electric capacity and electricity in adjacent series arm
The intersection point of sense；
Being 1200KVA when being applied to a capacity, no-load voltage ratio is 10KV/0.4KV, the transformator of short-circuit impedance UK=0.046, and this change
When depressor is connected on the 10KV network that capacity of short circuit is 100MVA, put into 3 groups of 2 iterated electrical filters, 2 groups of 3 chain types filters
Ripple device and 6 groups of 4 iterated electrical filters, each parameter of iterated electrical filter is as follows:
Table 6
Table 7
Table 8
Table 9
3. an iterated electrical filter, it is characterised in that: include n electric capacity, n inductance and n-1 noninductive resistance, wherein, all
One end of electric capacity is connected, and one end of all inductance is connected, and the other end correspondence of each electric capacity connects the another of an inductance
One end, forms n bar series arm；Described noninductive resistance is arranged between adjacent two series arms, i.e. noninductive resistance one end
Being connected to electric capacity and the intersection point of inductance in a series arm, the noninductive resistance other end is connected to electric capacity and electricity in adjacent series arm
The intersection point of sense；
Being 20000KVA when being applied to a capacity, no-load voltage ratio is 110KV/35KV, the transformator of short-circuit impedance UK=0.05, and should
When transformator is connected on the 110KV network that capacity of short circuit is 750MVA, putting into 2 groups of 3 iterated electrical filters, iterated electrical filter is joined
Number is as follows:
Table 10
Table 11
Table 12
Table 13
4. according to the iterated electrical filter described in claim 1 or 2 or 3, it is characterised in that: described n is integer, value according to
Depending on actual demand.
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| US5929618A (en) * | 1998-06-04 | 1999-07-27 | Lucent Technologies Inc. | System and method for synchronizing and interleaving power modules |
| CN201898336U (en) * | 2010-12-21 | 2011-07-13 | 南京格致电力技术有限公司 | Double-tuning filter based on flat wave resistors |
| CN102710106A (en) * | 2012-05-31 | 2012-10-03 | 沈阳鼎盛中贝机电设备有限公司 | Filter circuit structure |
| CN202616985U (en) * | 2012-05-31 | 2012-12-19 | 沈阳鼎盛中贝机电设备有限公司 | Filter circuit structure |
| CN204230900U (en) * | 2014-10-22 | 2015-03-25 | 沈阳鼎盛中贝机电设备有限公司 | A kind of iterated electrical filter |
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2014
- 2014-10-22 CN CN201410568434.1A patent/CN104269851B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5929618A (en) * | 1998-06-04 | 1999-07-27 | Lucent Technologies Inc. | System and method for synchronizing and interleaving power modules |
| CN201898336U (en) * | 2010-12-21 | 2011-07-13 | 南京格致电力技术有限公司 | Double-tuning filter based on flat wave resistors |
| CN102710106A (en) * | 2012-05-31 | 2012-10-03 | 沈阳鼎盛中贝机电设备有限公司 | Filter circuit structure |
| CN202616985U (en) * | 2012-05-31 | 2012-12-19 | 沈阳鼎盛中贝机电设备有限公司 | Filter circuit structure |
| CN204230900U (en) * | 2014-10-22 | 2015-03-25 | 沈阳鼎盛中贝机电设备有限公司 | A kind of iterated electrical filter |
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Effective date of registration: 20220913 Address after: 7th Floor, Lvchuang Building, No. 2, Chongyi North Road, Xinbei District, Changzhou City, Jiangsu Province Patentee after: Jiangsu Jiacheng Zhongbei Energy Technology Co.,Ltd. Address before: 315040 Building A6, No. 2, Lane 189, Canghai Road, Ningbo High-tech Zone, Zhejiang Province Patentee before: Ningbo Dingsheng Zhongbei Environmental Protection and Energy Saving Co.,Ltd. |
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