CN206849674U - Series connection neutral line current wave filter - Google Patents

Abstract

The utility model discloses one kind series connection neutral line current wave filter, including framework, framework includes iron core broad in the middle and the small iron core of both sides, it is characterized in that, also include the coil of three groups of independence, the coil of three groups of independence is rotating around being located 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 are each extended over out outside framework, the framework is closely square, and the periphery of quadra is provided with the fixture of convenient installation；Such series connection neutral line current wave filter, structure is novel, installation and wiring is simple and small volume, the neutral line current wave filter for being series at phase line of good wave filtering effect.

Description

Series connection neutral line current wave filter

Technical field

It the utility model is related to wave filter technology field, the especially neutral line current to phase line of being connected in a kind of electricity system Wave filter.

Background technology

With the continuous development of power technology, substantial amounts of nonlinear load, particularly more and more power electronics is used The power load of technology sharply increases, and plus electrical equipment is not distributed reasonably, thus produces substantial amounts of neutral line current, three times There is the neutral conductor of system in harmonic current and zero-sequence current, feed back to electric power system.It is such as large-scale in three-phase and four-line power system The nonlinear-loads such as fluorescent lamp, electricity-saving lamp and its large display screen curtain in market produce substantial amounts of triple harmonic current, if three Subharmonic is fed back in electric power system, in the neutral conductor（Zero line）It is overlapped, makes in transformer and the system of power and distribution supply cable Abnormity of zero line heating, cause a series of influence：(1), triple harmonic current will increase the loss of transformer, long-term fortune Guild causes transformer zero-sequence current excessive, and localized metallic part temperature rise is increased, and may cause to burn the serious consequence of 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 Heating, 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 is in parallel, and area occupied is larger, and filter effect is less than 70%, far can not meet the requirement of electric power system;(5)、 The problem of volume is big, and radiating effect is poor, and loss is high, and mounting means is limited be present in neutral line current absorber in parallel.

Described on end, triple-frequency harmonics and zero-sequence current in system have had influence on equipment operation, potential safety hazard be present, need Effectively to administer triple harmonic current in electricity system, zero-sequence current.

Utility model content

It is novel that the purpose of this utility model is to provide a kind of structure, installation and wiring is simple and small volume, filter effect The good neutral line current wave filter for being series at phase line.

The purpose of this utility model also resides in a kind of implementation of offer easily, effectively stops triple harmonic current, neutral line current And zero-sequence current flows into, but electrical equipment normal operation is not influenceed, so as to reach the series connection neutral line current of higher filter effect Application of the wave filter in electrical equipment.

What the purpose of this utility model was realized in：

One kind series connection neutral line current wave filter, including framework, framework include iron core broad in the middle and the small iron core of both sides, and it is special Sign is also to include the coil of three groups of independence, and the coil of three groups of independence is rotating around being located 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 framework, and the framework is closely square, The periphery of quadra is provided with the fixture of convenient installation；Such series connection neutral line current wave filter, by iron core broad in the middle The coil of upper three groups of independence of winding, and by the end of incoming cables at each group coil both ends and leading-out terminal connect respectively three-phase input power supply and Electrical equipment power input, magnetic field caused by iron core broad in the middle is set to form closed circulation magnetic circuit by the small iron core in both sides, when zero When line current, zero-sequence current and triple harmonic current are by iron core broad in the middle, iron core broad in the middle iron core small with both sides, which is formed, to be closed Close loop, formed very big a zero-sequence current and triple harmonic current impedance, prevent its from by, with reach filter out it is humorous The effect of ripple；Framework squarish is additionally, since, and periphery is provided with the fixture of convenient installation, this quadra is convenient Multiple different angles are fixed, such as：Horizontal or fixation of putting upside down, it installs extremely convenient, and each group coil is same around being located at On iron core broad in the middle, make its overall volume smaller, and coordinate the mode of connection of its end of incoming cables and leading-out terminal, its wiring is also extremely simple Single, quick, total is novel.

Further, four angles position position on front side of the quadra with rear side is respectively arranged with symmetrical shape, size Fixture described in identical, mounting hole is provided with fixture, this quadra, coordinates four angles position symmetrical shape, size phase With fixture, wave filter is installed and is fixed, facilitate the use of different user in multiple different angles.

Further, approximate " 7 " font in the cross section of the fixture, the fixture of " 7 " font include transverse sheet section and erected Fragment, transverse sheet section and riser Duan Jun are provided with the mounting hole, the fixture of this " 7 " font, utilize its transverse sheet section and riser section On mounting hole, it is convenient to be connected 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 with it is middle Big iron core is highly identical, and the width of small iron core is the half of iron core width broad in the middle；This had both met the control of material cost, again full The temperature increase requirement of the sufficient class of insulation, middle iron core form magnetic circuit with the small iron core in both sides so that the magnetic flux in iron core broad in the middle is with phase Same amount circulates to the small iron core in both sides, and the heat of iron core broad in the middle distributes to the small iron core in both sides, increases area of dissipation, temperature rise symbol Close and require.

Further, the spacing between the iron core broad in the middle and the small iron core in both sides is equal, and its effect is more preferable.

Further, the coil of three groups of independence is sequentially rotating around the first coil being located on iron core broad in the middle 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, circulation will be formed by forming the electric current of three-phase, pass through the law of electromagnetic induction（Screw law）, magnetic field caused by circulation is deposited In iron core broad in the middle, and the zero-sequence current of three-phase and triple harmonic current are also consequently formed magnetic field, exist in iron core broad in the middle, Form very big impedance so that neutral line current, zero-sequence current and the triple harmonic current inflow device of three-phase.

Further, Wiring port is respectively arranged with the end of incoming cables of each group coil and leading-out terminal, on Wiring port Mark is provided with, facilitates wiring.

Further, the framework include be square bottom plate and panel, the small iron core of iron core broad in the middle and both sides It is separately fixed between bottom plate and panel, it is various so that framework is flexible for installation.

What another object of the present utility model was realized in：

A kind of application of the neutral line current wave filter in electrical equipment of connecting, it is characterized in that, three groups of the wave filter enter Line end and three groups of leading-out terminals are connected 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, so as to form sizable impedance, stop zero-sequence current and triple harmonic current, with Reach filter effect；Application of such wave filter in electrical equipment, by the way that the end of incoming cables on wave filter and leading-out terminal are distinguished It is connected with three-phase input power supply and electrical equipment power input, you can realize the purpose of this patent, it is easy that it is implemented, connection side Just, flexibly.

Further, threephase switch is also had additional between the wave filter and three-phase input power supply, to control wave filter Work.

Further, the neutral line current wave filter of phase line is series at, is filtered（Reactance）The iron core broad in the middle of device is big, and both sides are small The small package assembly of iron core, meets reactor operation characteristic, and meets national standard, meets the temperature increase requirement etc. of the class of insulation, There is filtering again（Reactance）The coiling of device（The coil of three groups of independence）It is winding in order, its winding order 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, filter reactor Winding mode allows end of incoming cables to be exchanged with each other with leading-out terminal, workmen's installation at convenient 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, upside down fixed and crouches solid Fixed is also that unanimously, workmen's installation at convenient scene, then structured particularity cause series connection zero sequence filter formation one The individual 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 to have the overall structure of tandem type neutral line current absorber.

The beneficial effects of the utility model are as follows：

（1）Such series connection neutral line current wave filter, by the coil of three groups of independence 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 connect three-phase input power supply and electrical equipment power input respectively, make broad in the middle Magnetic field caused by iron core forms closed circulation magnetic circuit by the small iron core in both sides, when neutral line current, zero-sequence current and triple-frequency harmonics When electric current is by iron core broad in the middle, iron core broad in the middle forms closed-loop path with the small iron core in both sides, forms a very big zero sequence electricity The impedance of stream and triple harmonic current, prevents it from by reach the effect for filtering out harmonic wave；It is additionally, since framework approximation It is square, and periphery is provided with the fixture of convenient installation, this quadra facilitates multiple different angles to fix, such as：It is horizontal or Put upside down fixation, it installs extremely convenient, and each group coil is around being located on same iron core broad in the middle, make its overall volume compared with It is small, and coordinate the mode of connection of its end of incoming cables and leading-out terminal, its wiring is also extremely simple, quick, and total is novel.

（2）Further, such wave filter, is middle by iron core broad in the middle, the small iron core in both sides, and the volume of the small iron core in both sides The structure of big core volume half so that reactor cost greatly reduces, and processing installation is very clear, improves production effect Benefit.

（3）In addition, the winding mode of series connection neutral line current wave 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 causes the speed for also accelerating iron core winding while filter effect greatly promotes；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 more than 97%, then have in iron core winding broad in the middle, when first layer coil layer around it is complete after, extend a part Outlet, somewhat opposite direction are rolled over, 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 The both sides of layer just form three and entered（A、B、C）Three go out（X、Y、Z）Terminal head, such winding mode be advantageous to quickening produce into Degree, improve production efficiency；The terminal for having the coil extraction for being exactly both sides again is mutually changed to end of incoming cables or leading-out terminal, facilitates live work Make the installation of personnel.

（4）Neutral line current wave filter connect with the structure of square, because also there is very big advantage to installation, filtering （Reactor）Fixed installation part up and down be provided which equal in magnitude, size identical fixing hole so that wave filter can upside down peace Dress（Top is arranged on bottom）, can also crouch and install（Side is arranged on bottom）, a variety of mounting means meets the various differences in scene Installation requirements.

（5）Application of such wave filter in electrical equipment, by by the end of incoming cables on wave filter and leading-out terminal respectively with Three-phase input power supply connects with electrical equipment power input, you can realizes the purpose of this patent, it is easy that it is implemented, connection side Just, flexibly.

Brief description of the drawings

Fig. 1 is the block schematic illustration of the utility model series connection neutral line current wave filter.

Fig. 2 is the utility model series connection neutral line current wave filter（Winding coil）Stereogram.

Fig. 3 is the fundamental diagram of the utility model series connection neutral line current wave filter.

Fig. 4 is the fundamental diagram of the utility model series connection neutral line current wave filter other direction.

Fig. 5 is the electrical wiring schematic diagram of series connection neutral line current wave filter of the present utility model.

Embodiment

The utility model is described in further detail below in conjunction with drawings and examples.

As shown in Fig. 1 to Fig. 5 figures, one kind series connection neutral line current wave filter, including quadra 10, framework 10 can also be Squarish, the framework 10 include the small iron core 2 of iron core 1 broad in the middle and both sides, it is characterized in that, also include three groups of independence Coil, the coil of three groups of independence is rotating around being located 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 are simultaneously each extended over out outside framework 10, and the periphery of quadra 10 is provided with consolidating for convenient installation Determine part 8, in the present embodiment, four angles position position of the front side of quadra 10 and rear side is respectively arranged with symmetrical shape, big Fixture 8 described in small identical, mounting hole 83 is provided with fixture 8.

Shown in figure, approximate " 7 " font in cross section of the fixture 8, the fixture 8 of " 7 " font includes 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 the volume of iron core 1 broad in the middle, and the height of small iron core 2 with Iron core 1 broad in the middle is highly identical, and the width of small iron core 2 is the half of the width of iron core 1 broad in the middle, and iron core 1 broad in the middle and both sides are small Spacing between iron core 2 is equal.

Wiring port 11 is respectively arranged with the end of incoming cables 6 of each group coil and leading-out terminal 7, is set on Wiring port 11 There is mark 12, user can pass through mark, convenient and external cabling.

The framework 10 include be square bottom plate 1001 and panel 1002, the small iron of iron core 1 broad in the middle and both sides Core 2 is separately fixed between bottom plate 1001 and panel 1002.

The utility model, a kind of application of the neutral line current wave filter in electrical equipment of connecting is also disclosed, it is characterized in that, institute State wave filter 1000 three groups of ends of incoming cables 6 and three groups of leading-out terminals 7 respectively with three-phase input power supply A, B, C and the power supply of electrical equipment 13 Input connects, so that filters in series is between three-phase input power supply A, B, C and electrical equipment 13, it is sizable so as to be formed Impedance, stop zero-sequence current and triple harmonic current, to reach filter effect

Three-phase is also had additional as more preferably embodiment, between described wave filter 1000 and three-phase input power supply A, B, C to open 14 are closed, facilitates user to control wave filter 1000 to work by threephase switch 14.

As shown in Figure 2, iron core 1 broad in the middle and the small iron core 2 of both sides, and panel 1002 and bottom plate 1001 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 both sides, is combined To form the magnetic circuit 9 shown in figure, magnetic field caused by iron core 1 broad in the middle forms the magnetic of closed circulation by the small iron core 2 on both sides Road 9, when neutral line current, zero-sequence current and triple harmonic current 11 are by iron core 1 broad in the middle, iron core broad in the middle and both sides are small Iron core 2 forms closed-loop path, forms the impedance of a very big zero-sequence current and triple harmonic current 11, prevents it from leading to Cross, to reach the effect for filtering out harmonic wave.

Again as shown in Fig. 3 and Fig. 4, the coil of three groups of independence（I.e.：The coil of three-phase）It is wound on iron core 1 broad in the middle, institute State the coil of three groups of independence sequentially rotating around be located on iron core 1 broad in the middle First Line ring layer 3, the and of the second coil layer 4 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 form circulation 10-1, pass through the law of electromagnetic induction（Screw law）, magnetic field caused by circulation exists broad in the middle Iron core 1, and the zero-sequence current of three-phase and triple harmonic current 11 are also consequently formed magnetic field, exist in iron core 1 broad in the middle, with reference to 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 the coil of three groups of independence is 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 independence coil rotating around on iron core 1 broad in the middle, caused Direction of circulation, magnetic circuit direction, and magnetic resistance 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 Can be with reverse wiring, i.e., with three-phase leading-out terminal 7：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 End of incoming cables 6 is changed to, such mode of connection meets the different wiring requirement of client.

Series connection neutral line current wave filter（I.e.：Series connection neutral line current absorber）It is to be fixed by fixture 8, due to tandem type The structure of neutral line current absorber is square, so fixture 8 is made into the pattern of " 7 " font, increases a variety of fixed forms, Allow tandem type neutral line current absorber horizontal fixed, can also put upside down fixation, with reference to inlet-outlet line mode shown in the drawings, So that tandem type neutral line current absorber there are a variety of fixed forms, more meet the different installation requirement of client.

Finally, as shown in Figure 5, it is the primary system figure of tandem type neutral line current absorber in figure（Electrical wiring principle Figure）, tandem type neutral line current absorber is connected on three-phase input power supply A, B, C（I.e.：Electricity system）Between electrical equipment 13, 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, stop that triple harmonic current, neutral line current and zero-sequence current 11 flow into, but allow other electric currents to flow into, do not influence electricity consumption The normal operation of equipment 13, so as to reach higher filter effect.

Claims (8)

1. one kind series connection neutral line current wave filter, including framework（10）, framework（10) iron core broad in the middle is included（1）It is small with both sides Iron core（2）, it is characterized in that, also include the coil of three groups of independence, the coil of three groups of independence is rotating around being located at iron broad in the middle Core（1）On, and the both ends of every group of coil are respectively as the end of incoming cables of this group of coil（6）And leading-out terminal（7）And each extend over out frame Frame（10）Outside, the framework（10）Closely it is square, quadra（10）Periphery be provided with the fixture of convenient installation（8）.

2. neutral line current wave filter of connecting according to claim 1, it is characterized in that, the quadra（10）Front side and rear side Four angles position position be respectively arranged with symmetrical shape, fixture described in size identical（8）, fixture（8）On be provided with installation Hole（83）.

3. neutral line current wave filter of connecting according to claim 2, it is characterized in that, the fixture（8）Cross section it is approximate " 7 " font, the fixture of " 7 " font（8）Including transverse sheet section（81）With riser section（82）, transverse sheet section（81）With riser section（82） It is provided with the mounting hole（83）.

4. neutral line current wave filter of connecting according to claim 1, it is characterized in that, the small iron core（2）Volume be middle Big iron core（1）The half of volume, and small iron core（2）Height and iron core broad in the middle（1）It is highly identical, small iron core（2）Width For iron core broad in the middle（1）The half of width.

5. neutral line current wave filter of connecting according to claim 4, it is characterized in that, the iron core broad in the middle（1）It is small with both sides Iron core（2）Between spacing it is equal.

6. neutral line current wave filter of connecting according to claim 1, it is characterized in that, the coil of three groups of independence is by successively suitable Sequence is rotating around being located at iron core broad in the middle（1）On First Line ring layer（3）, the second coil layer（4）With tertiary coil layer（5）, so that Iron core broad in the middle（1）In upper formation, in, outer three layer lines ring layer.

7. neutral line current wave filter of connecting according to claim 6, it is characterized in that, the end of incoming cables of each group coil（6）With Leading-out terminal（7）On be respectively arranged with Wiring port（11）, Wiring port（11）On be provided with mark（12）.

8. neutral line current wave filter of connecting according to claim 1, it is characterized in that, the framework（10）Including being square Bottom plate（1001）And panel（1002）, iron core broad in the middle（1）Bottom plate is separately fixed at the small iron core 2 of both sides（1001）And face Plate（1002）Between.