CN107146698B - Series connection neutral line current filter and its application in electrical equipment - Google Patents
Series connection neutral line current filter and its application in electrical equipment Download PDFInfo
- Publication number
- CN107146698B CN107146698B CN201710439503.2A CN201710439503A CN107146698B CN 107146698 B CN107146698 B CN 107146698B CN 201710439503 A CN201710439503 A CN 201710439503A CN 107146698 B CN107146698 B CN 107146698B
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- iron core
- broad
- neutral line
- line current
- filter
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F37/00—Fixed inductances not covered by group H01F17/00
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
- H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
- H01F27/266—Fastening or mounting the core on casing or support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
- H01F27/306—Fastening or mounting coils or windings on core, casing or other support
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses a kind of series connection neutral line current filters, including frame, frame includes the small iron core of iron core broad in the middle and two sides, it is characterized in that, it further include having three groups of independent coils, three groups of independent coils are wound around respectively on iron core broad in the middle, and the both ends of every group of coil respectively as the end of incoming cables of this group of coil and leading-out terminal and each extend over out outside frame, the frame is closely square, and the periphery of square frame is provided with the fixing piece for facilitating installation；Such series connection neutral line current filter, structure novel, installation and wiring is simple and small in size, the neutral line current filter for being series at phase line of good wave filtering effect；Implement to be easy the invention also discloses a kind of, effectively blocking triple harmonic current, neutral line current and zero-sequence current flow into, but do not influence electrical equipment normal operation, to reach application of the series connection neutral line current filter of higher filter effect in electrical equipment.
Description
Technical field
The present invention relates to wave filter technology fields, especially filter to a kind of neutral line current for phase line of connecting in electricity system
Device and the application of the filter filter in electrical equipment.
Background technique
With the continuous development of power technology, a large amount of nonlinear load especially more and more uses power electronics
The power load of technology sharply increases, in addition do not distribute electrical equipment reasonably, thus generates a large amount of neutral line current, three times
Harmonic current and zero-sequence current feed back to power supply system there are the neutral conductor of system.It is such as large-scale in three-phase and four-line electric system
The nonlinear-loads such as fluorescent lamp, energy-saving lamp and its large display screen curtain in market generate a large amount of triple harmonic current, if three
Subharmonic is fed back in power supply system, is overlapped, is made in the transformer and system of power and distribution supply cable in the neutral conductor (zero curve)
Abnormity of zero line fever, lead to a series of influence: (1), triple harmonic current will increase the loss of transformer, it is long-term to transport
Guild causes transformer zero-sequence current excessive, and localized metallic part temperature rise is increased, and may cause the serious consequence for burning transformer；
(2), the domestic sectional area for generally choosing neutral conductor is the 50% of phase line, and the superposition of triple harmonic current will cause the neutral conductor
Fever, increase line loss, accelerate insulation ag(e)ing, reduce service life, fire is caused when serious；(3), triple-frequency harmonics compares
Bright light source scintillation and damage, image display stroboscopic, display distortion, influence normally to work;(40, existing neutral line current
Arrester be it is in parallel, area occupied is larger, and filter effect be lower than 70%, be far from satisfying the requirement of power supply system;(5),
That there are volumes is big for neutral line current absorber in parallel, and heat dissipation effect is poor, and loss is high, the limited problem of mounting means.
As stated above, the triple-frequency harmonics in system and zero-sequence current have influenced equipment operation, and there are security risks, need
Effectively to administer triple harmonic current in electricity system, zero-sequence current.
Summary of the invention
The purpose of the present invention is to provide a kind of structure novel, installation and wiring are simple and small in size, good wave filtering effect
It is series at the neutral line current filter of phase line.
Implement to be easy the object of the invention is also to provide a kind of, effectively blocking triple harmonic current, neutral line current and zero
Sequence electric current flows into, but does not influence electrical equipment normal operation, to reach the series connection neutral line current filtering of higher filter effect
Application of the device in electrical equipment.
The object of the present invention is achieved like this:
A kind of series connection neutral line current filter, including frame, frame include the small iron core of iron core broad in the middle and two sides, special
Sign be further include having three groups of independent coils, three groups of independent coils are wound around respectively on iron core broad in the middle, and every group of line
The both ends of circle are respectively as the end of incoming cables of this group of coil and leading-out terminal and each extend over out outside frame, and the frame is closely square,
The periphery of square frame is provided with the fixing piece for facilitating installation；Such series connection neutral line current filter, by iron core broad in the middle
Three groups of independent coils of upper winding, and by the end of incoming cables at each group coil both ends and leading-out terminal be separately connected three-phase input power supply and
Electrical equipment power input, the magnetic field for generating iron core broad in the middle forms closed circulation magnetic circuit by the small iron core in two sides, when zero
When line current, zero-sequence current and triple harmonic current pass through iron core broad in the middle, iron core broad in the middle is closed with the small iron core formation in two sides
Close circuit, formed very big a zero-sequence current and triple harmonic current impedance, prevent it from passing through, with reach filter out it is humorous
The effect of wave；Moreover, because frame squarish, and periphery is provided with the fixing piece for facilitating installation, this square frame is convenient
Multiple and different angles are fixed, such as: horizontal or fixation of putting upside down, install it is extremely convenient, and each group coil be wound around it is same
On iron core broad in the middle, keep its overall volume smaller, and cooperate the mode of connection of its end of incoming cables and leading-out terminal, wiring is also extremely simple
Single, quick, total is novel.
Further, on front side of the square frame and four angles position position of rear side is respectively arranged with symmetrical shape, size
The identical fixing piece, mounting hole is provided on fixing piece, and this square frame cooperates four angles position symmetrical shape, size phase
Same fixing piece, makes filter in multiple and different angles, can install and fix, facilitate the use of different user.
Further, approximate " 7 " font in the cross section of the fixing piece, the fixing piece of " 7 " font include transverse sheet section and erect
Segment, transverse sheet section and riser Duan Jun are provided with the mounting hole, and the fixing piece of this " 7 " font utilizes its transverse sheet section and riser section
On mounting hole, convenient being connected and fixed with outside.
Further, the volume of the small iron core is the half of core volume broad in the middle, and the height of small iron core and intermediate
Big iron core height is identical, and the width of small iron core is the half of iron core width broad in the middle；This had not only met the control of material cost, but also full
The temperature increase requirement of the sufficient class of insulation, the small iron core of intermediate iron core and two sides forms magnetic circuit, so that the magnetic flux in iron core broad in the middle is with phase
Same amount is to the small iron core circulation in two sides, and the heat of iron core broad in the middle is distributed to the small iron core in two sides, increases heat dissipation area, temperature rise symbol
It closes and requires.
Further, the spacing between the iron core broad in the middle and the small iron core in two sides is equal, and effect is more preferable.
Further, three groups of independent coils are sequentially wound around the first coil on iron core broad in the middle respectively
Layer, the second coil layer and tertiary coil layer so that in being formed on iron core broad in the middle, in, outer three layer lines ring layer；This coiling side
Formula, the electric current for forming three-phase will will form circulation, and by the law of electromagnetic induction (screw law), the magnetic field that circulation generates is deposited
In iron core broad in the middle, and magnetic field is also consequently formed in the zero-sequence current of three-phase and triple harmonic current, there are in iron core broad in the middle,
Very big impedance is formed, so that the neutral line current of three-phase, zero-sequence current and triple harmonic current inflow device.
Further, Wiring port is respectively arranged on the end of incoming cables of each group coil and leading-out terminal, on Wiring port
It is provided with mark, facilitates wiring.
Further, the frame includes the bottom plate and panel being square, the small iron core of iron core broad in the middle and two sides
It is separately fixed between bottom plate and panel, so that frame is flexible for installation, multiplicity.
It is another object of the present invention to what is be achieved:
A kind of application of the series connection neutral line current filter in electrical equipment, characterized in that three groups of the filter into
Line end and three groups of leading-out terminals are connect with three-phase input power supply and electrical equipment power input respectively, so that filters in series is three
Between phase input power and electrical equipment, to form sizable impedance, stop zero-sequence current and triple harmonic current, with
Reach filter effect；Application of such filter in electrical equipment, by by filter end of incoming cables and leading-out terminal distinguish
It is connect with three-phase input power supply and electrical equipment power input, the purpose of this patent can be realized, implement to be easy, connection side
Just, flexibly.
Further, threephase switch is also had additional between the filter and three-phase input power supply, to control filter
Work.
Further, it is series at the neutral line current filter of phase line, the iron core broad in the middle for filtering (reactance) device is big, and two sides are small
The small package assembly of iron core, meets reactor operation characteristic, and meet national standard, meets the temperature increase requirement etc. of the class of insulation,
The coiling (three groups of independent coils) for having filtering (reactance) device again is winding in order, and winding sequence is with First Line ring layer → the
Two wires ring layer → tertiary coil layer so that on iron core broad in the middle formed in, in, outer three layer lines ring layer；Further more, filter reactor
Winding mode is exchanged with each other end of incoming cables with leading-out terminal, facilitates construction personnel's installation at scene, then has filter reactor
Mounting structure using square shape structure the bottom of as, the mounting hole of upper end and lower end is consistent, and is upsided down fixed and is crouched solid
It is fixed to be also consistent, facilitate construction personnel's installation at scene, then structured particularity to make zero sequence filter formation one of connecting
A impedance just for triple harmonic current, neutral line current and zero-sequence current, so that filter effect reaches 97% and do not influence equipment
Normal operation, then it is reasonable for having the overall structure of tandem type neutral line current absorber.
Beneficial effects of the present invention are as follows:
(1) such series connection neutral line current filter by three groups of independent coils of winding on iron core broad in the middle, and passes through
The end of incoming cables at each group coil both ends and leading-out terminal are separately connected three-phase input power supply and electrical equipment power input, make broad in the middle
The magnetic field that iron core generates forms closed circulation magnetic circuit by the small iron core in two sides, when neutral line current, zero-sequence current and triple-frequency harmonics
When electric current passes through iron core broad in the middle, the small iron core of iron core broad in the middle and two sides forms closed circuit, forms a very big zero sequence electricity
The impedance of stream and triple harmonic current, prevents it from passing through, to achieve the effect that filter out harmonic wave；Moreover, because frame is approximate
Rectangular, and periphery is provided with the fixing piece for facilitating installation, this square frame facilitates multiple and different angles to fix, such as: it is horizontal or
Put upside down fixation, install extremely convenient, and each group coil is wound around on same iron core broad in the middle, make its overall volume compared with
It is small, and cooperate the mode of connection of its end of incoming cables and leading-out terminal, wiring is also extremely simple, quick, and total is novel.
(2) further more, such filter, by iron core broad in the middle, the small iron core in two sides, and the volume of the small iron core in two sides is intermediate
The structure of big core volume half, so that reactor cost greatly reduces, processing installation is very clear, improves production effect
Benefit.
(3) in addition, the winding mode of series connection neutral line current filter, is to be wound on iron core broad in the middle so that three phase lines are same in order
On, this novel structure makes filter effect also accelerate the speed of iron core winding while greatly promoting；It is humorous three times when three-phase
When involving zero-sequence current by same iron core, sizable impedance is formed to stop the inflow of harmonic current in core interior, is made
Filter effect up to 97% or more, then have in iron core winding broad in the middle, when first layer coil layer around it is complete after, extend a part
Outlet, slightly opposite direction folding, then further around second layer coil layer, when second layer coil layer around it is complete after, extend a part of outlet, slightly
Micro- opposite direction folding, continues around third layer coil layer, when coil around it is complete after, the place that opposite direction just now is rolled over is cut short, three layer line circles
Layer both sides just formed three into (A, B, C) three go out (X, Y, Z) terminal heads, such winding mode be conducive to accelerate produce into
Degree improves production efficiency；Have again be exactly two sides coil draw terminal be mutually changed to end of incoming cables or leading-out terminal, facilitate live work
Make the installation of personnel.
(4) series connection neutral line current filter is filtered with the structure of square because also there is very big advantage to installation
The fixed installation part up and down of (reactor) is provided which equal in magnitude, and the identical fixation hole of size allows filter to upside down peace
It fills (top is mounted on bottom), can also crouch installation (side is mounted on bottom), and a variety of mounting means meets the various differences in scene
Installation requirements.
(5) application of such filter in electrical equipment, by by filter end of incoming cables and leading-out terminal respectively with
Three-phase input power supply is connected with electrical equipment power input, and the purpose of this patent can be realized, and implements to be easy, connection side
Just, flexibly.
Detailed description of the invention
Fig. 1 is the block schematic illustration of present invention series connection neutral line current filter.
Fig. 2 is the perspective view of present invention series connection neutral line current filter (winding coil).
Fig. 3 is the working principle diagram of present invention series connection neutral line current filter.
Fig. 4 is the working principle diagram of present invention series connection neutral line current filter other direction.
Fig. 5 is the electrical wiring schematic diagram of series connection neutral line current filter of the invention.
Specific embodiment
The present invention is described in further detail below in conjunction with drawings and examples.
As shown in Fig. 1 to Fig. 5 figure, a kind of series connection neutral line current filter, including square frame 10, frame 10 are also possible to
Squarish, the small iron core 2 of the frame 10 including iron core 1 broad in the middle and two sides, characterized in that further include have three groups it is independent
Coil, three groups of independent coils are wound around respectively on iron core 1 broad in the middle, and the both ends of every group of coil are respectively as this group of line
The end of incoming cables 6 of circle and leading-out terminal 7 simultaneously each extend over out outside frame 10, and the periphery of square frame 10, which is provided with, facilitates consolidating for installation
Determine part 8, in the present embodiment, four angles position position of 10 front side of square frame and rear side is respectively arranged with symmetrical shape, big
The small identical fixing piece 8 is provided with mounting hole 83 on fixing piece 8.
As shown in the figure, approximate " 7 " font in the cross section of the fixing piece 8, the fixing piece 8 of " 7 " font include transverse sheet section 81
With riser section 82, transverse sheet section 81 and riser section 82 are provided with the mounting hole 83.
In the present embodiment, the volume of the small iron core 2 is the half of 1 volume of iron core broad in the middle, and the height of small iron core 2 with
1 height of iron core broad in the middle is identical, and the width of small iron core 2 is the half of 1 width of iron core broad in the middle, and iron core 1 broad in the middle and two sides are small
Spacing between iron core 2 is equal.
It is respectively arranged with Wiring port 11 on the end of incoming cables 6 of each group coil and leading-out terminal 7, is arranged on Wiring port 11
There is mark 12, user can pass through mark, convenient and external cabling.
The frame 10 includes the bottom plate 1001 and panel 1002 being square, the small iron of iron core 1 broad in the middle and two sides
Core 2 is separately fixed between bottom plate 1001 and panel 1002.
A kind of application of the neutral line current filter in electrical equipment of connecting is also disclosed, characterized in that the filter in the present invention
Three groups of ends of incoming cables 6 of wave device 1000 and three groups of leading-out terminals 7 respectively with 13 power input of three-phase input power supply A, B, C and electrical equipment
End connection, so that filters in series is between three-phase input power supply A, B, C and electrical equipment 13, to form sizable resistance
It is anti-, stop zero-sequence current and triple harmonic current, to reach filter effect
As more preferably embodiment, three-phase is also had additional between the filter 1000 and three-phase input power supply A, B, C and is opened
14 are closed, facilitates user to control filter 1000 by threephase switch 14 and works.
As shown in Figure 2, iron core 1 broad in the middle and the small iron core 2 and panel 1002 and bottom plate 1001 of two sides are combined into series connection
Type neutral line current absorber iron core frameworks 1000, wherein the width of iron core 1 broad in the middle is 2 times of the small iron core 2 in two sides, and group closes
To form magnetic circuit 9 shown in figure, the magnetic that the magnetic field that iron core 1 broad in the middle generates passes through the formation closed circulation of small iron core 2 on both sides
Road 9, when neutral line current, zero-sequence current and triple harmonic current 11 pass through iron core 1 broad in the middle, iron core broad in the middle and two sides are small
Iron core 2 forms closed circuit, forms the impedance of a very big zero-sequence current and triple harmonic current 11, prevents it from leading to
It crosses, to achieve the effect that filter out harmonic wave.
Again as shown in figure 3 and figure 4, three groups of independent coils (that is: the coil of three-phase) are wound on iron core 1 broad in the middle, institute
State First Line ring layer 3,4 and of the second coil layer that three groups of independent coils are sequentially wound around respectively on iron core 1 broad in the middle
Tertiary coil layer 5 so that on iron core broad in the middle 1 formed in, in, outer three layer lines ring layer, this special winding mode, three-phase
Electric current will will form circulation 10-1, and by the law of electromagnetic induction (screw law), there are broad in the middle in the magnetic field that circulation generates
Iron core 1, and magnetic field is also consequently formed in the zero-sequence current of three-phase and triple harmonic current 11, there are in iron core 1 broad in the middle, in conjunction with
Closed magnetic circuit is formed with magnetic circuit 9 shown in Fig. 2, forms very big impedance, so that the neutral line current of three-phase, zero-sequence current and three times
Harmonic current inflow device.
After three groups of independent coils are wound on iron core 1 broad in the middle, three-phase end of incoming cables 6 and three-phase leading-out terminal 7 are drawn respectively, by
In three groups of independent coils rotating around on iron core 1 broad in the middle, Direction of circulation, magnetic circuit direction and the magnetic resistance of generation are with electricity
Stream flows into direction and changes and change, but does not influence the filter effect of tandem type neutral line current absorber, so three-phase end of incoming cables 6
It can be reversed wiring with three-phase leading-out terminal 7, it may be assumed that three-phase end of incoming cables 6 can be changed to leading-out terminal 7, and three-phase leading-out terminal 7 can be with
It is changed to end of incoming cables 6, such mode of connection meets the different wiring requirement of client.
Series connection neutral line current filter (that is: series connection neutral line current absorber) is fixed by fixing piece 8, due to tandem type
The structure of neutral line current absorber increases a variety of fixed forms so fixing piece 8 is changed to the pattern of " 7 " font for square,
Allow tandem type neutral line current absorber horizontal fixed, can also put upside down fixation, in conjunction with inlet-outlet line mode shown in the drawings,
So that there are many fixed forms for tandem type neutral line current absorber, more meet the different installation requirement of client.
Finally, as shown in Figure 5, in figure being primary system figure (the electrical wiring principle of tandem type neutral line current absorber
Figure), tandem type neutral line current absorber is connected on three-phase input power supply A, B, C(i.e.: electricity system) and electrical equipment 13 between,
Due to tandem type neutral line current absorber structure particularity, one is made for the big of neutral line current three times and zero-sequence current
Impedance stops triple harmonic current, neutral line current and zero-sequence current 11 to flow into, but other electric currents is allowed to flow into, and does not influence electricity consumption
The normal operation of equipment 13, to reach higher filter effect.
Claims (5)
1. a kind of series connection neutral line current filter, including frame (10), frame (10) includes the small of iron core broad in the middle (1) and two sides
Iron core (2), characterized in that further include having three groups of independent coils, three groups of independent coils are wound around iron broad in the middle respectively
On core (1), and the both ends of every group of coil respectively as the end of incoming cables (6) of this group of coil and leading-out terminal (7) and each extend over out frame
Outside, frame (10) squarish, the periphery of the frame (10) is provided with the fixing piece (8) for facilitating installation to frame (10)；Institute
State First Line ring layer (3), the second coil layer that three groups of independent coils are sequentially wound around respectively on iron core broad in the middle (1)
(4) and tertiary coil layer (5), so that in being formed on iron core broad in the middle (1), in, outer three layer lines ring layer；
On front side of the frame (10) and four angles of rear side position is respectively arranged with the identical fixation of symmetrical shape, size
Part (8) is provided with mounting hole (83) on fixing piece (8)；
Approximate " 7 " font in the cross section of the fixing piece (8), the fixing piece (8) of " 7 " font includes transverse sheet section (81) and riser section
(82), transverse sheet section (81) and riser section (82) are provided with the mounting hole (83)；
The volume of the small iron core (2) is the half of iron core broad in the middle (1) volume, and the height of small iron core (2) and iron broad in the middle
Core (1) height is identical, and the width of small iron core (2) is the half of iron core broad in the middle (1) width.
2. neutral line current filter of connecting according to claim 1, characterized in that the iron core (1) broad in the middle and two sides are small
Spacing between iron core (2) is equal.
3. according to claim 1 connect neutral line current filter, characterized in that the end of incoming cables (6) of each group coil and
It is respectively arranged on leading-out terminal (7) Wiring port (11), mark (12) is provided on Wiring port (11).
4. neutral line current filter of connecting according to claim 1, characterized in that the frame (10) includes being square
Bottom plate (1001) and panel (1002), the small iron core 2 of iron core (1) broad in the middle and two sides is separately fixed at bottom plate (1001) and face
Between plate (1002).
5. a kind of application of neutral line current filter of series connection as described in claim 1 in electrical equipment, characterized in that the filter
The three groups of ends of incoming cables (6) and three groups of leading-out terminals (7) of wave device (1000) respectively with three-phase input power supply (A, B, C) and electrical equipment
(13) power input connects, so that filters in series is between three-phase input power supply (A, B, C) and electrical equipment (13), thus
Sizable impedance is formed, stops zero-sequence current and triple harmonic current, to reach filter effect；The filter (1000)
Threephase switch (14) are also had additional between three-phase input power supply (A, B, C).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710439503.2A CN107146698B (en) | 2017-06-12 | 2017-06-12 | Series connection neutral line current filter and its application in electrical equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710439503.2A CN107146698B (en) | 2017-06-12 | 2017-06-12 | Series connection neutral line current filter and its application in electrical equipment |
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| Publication Number | Publication Date |
|---|---|
| CN107146698A CN107146698A (en) | 2017-09-08 |
| CN107146698B true CN107146698B (en) | 2019-08-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710439503.2A Active CN107146698B (en) | 2017-06-12 | 2017-06-12 | Series connection neutral line current filter and its application in electrical equipment |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108270221B (en) * | 2018-03-13 | 2020-05-29 | 国网福建石狮市供电有限公司 | Civil load harmonic treatment device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102801302A (en) * | 2011-05-24 | 2012-11-28 | 浙江海洋学院 | Method for reducing noise by wrapping and shielding with inductance coil |
| CN105679516A (en) * | 2016-03-16 | 2016-06-15 | 陈甲标 | Novel three-phase zero-sequence harmonic series reactor |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2746625Y (en) * | 2004-06-28 | 2005-12-14 | 麦德志 | Triple harmonic power filter |
| US7535125B2 (en) * | 2006-05-09 | 2009-05-19 | Mte Corporation | Single-phase filter for reducing harmonics |
| CN102360720B (en) * | 2011-06-01 | 2013-10-16 | 北京旺兴达电气设备有限公司 | Magnetic zero sequence filter |
| CN206849674U (en) * | 2017-06-12 | 2018-01-05 | 广东光达电气有限公司 | Series connection neutral line current wave filter |
-
2017
- 2017-06-12 CN CN201710439503.2A patent/CN107146698B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102801302A (en) * | 2011-05-24 | 2012-11-28 | 浙江海洋学院 | Method for reducing noise by wrapping and shielding with inductance coil |
| CN105679516A (en) * | 2016-03-16 | 2016-06-15 | 陈甲标 | Novel three-phase zero-sequence harmonic series reactor |
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| CN107146698A (en) | 2017-09-08 |
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