CN202797974U - Power grid filter circuit structure - Google Patents
Power grid filter circuit structure Download PDFInfo
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- CN202797974U CN202797974U CN2012205105415U CN201220510541U CN202797974U CN 202797974 U CN202797974 U CN 202797974U CN 2012205105415 U CN2012205105415 U CN 2012205105415U CN 201220510541 U CN201220510541 U CN 201220510541U CN 202797974 U CN202797974 U CN 202797974U
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- capacitor
- inductance
- filter circuit
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- electric capacity
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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 power grid filter circuit structure, belonging to the electric power system technology field. The circuit structure comprises at least three capacitors, at least two inductors, two non-inductive resistors and a switch; the first capacitor is connected with the first inductor to form a first series branch, the second capacitor is connected with the second inductor to form a second series branch, and the first series branch is connected with the second series branch to form a parallel circuit; one end of the above parallel circuit is connected with the switch, and a series branch composed of the two non-inductive resistors is connected between the connection point of the first capacitor and the first inductor and the connection point of the second capacitor and the second inductor; one end of the third capacitor is connected at the position of the connection point of the two non-inductive resistors, and the other end is connected with the other end of the parallel circuit. The power grid filter circuit structure of the utility model enables the active loss to be reduced and the filtering efficiency of a specified characteristic harmonic to be improved, can prevent the adjacent frequency harmonic amplification with the specified characteristic harmonic, and at the same time, can cover and filter various higher harmonic.
Description
Technical field
The utility model belongs to technical field of power systems, is specifically related to a kind of electrical network filter circuit construction.
Background technology
Filter circuit is usually used in the ripple in the elimination rectifier output voltage, generally formed by reactance component, as at load resistance two ends shunt capacitor C, or with load series reactor L, and the various compound filter circuit that is formed by electric capacity, inductance.
Filter circuit commonly used has passive filtering and active power filtering two large classes.If the filter circuit element only is comprised of passive component (resistance, electric capacity, inductance), then is passive filter circuit.The principal mode of passive filtering has capacitor filtering, inductor filter and compound filtering (comprising inverted L shape, LC filtering, LC π type filtering and the filtering of RC π type etc.).If filter circuit not only by passive component, also is comprised of active element (ambipolar pipe, monopole type pipe, integrated transporting discharging), then is active filter circuit.The principal mode of active power filtering is Active RC filtering, also is known as electronic filter.
Fig. 1 is existing second-order filter circuit structural circuit schematic diagram, adopts inductance L first in parallel with load resistance R, and the structure of series capacitance C realizes again.Fig. 2 is existing three rank filter circuit construction circuit theory diagrams, adopts capacitor C 2 to connect first with load resistance R, shunt inductance L again, the structure of connecting with capacitor C 1 again realization.More than in two kinds of filter circuits the load resistance both end voltage large, the electric current of the load resistance that causes flowing through is large, the circuit active loss is high.
Summary of the invention
Deficiency for existing apparatus exists the utility model proposes a kind of electrical network filter circuit construction, to reach the reduction active loss, improves filtration efficiency, prevents from amplifying and covering with the adjacent times harmonic of characteristic harmonics of appointment the purpose of the various high order harmonic components of filtering.
A kind of electrical network filter circuit construction, comprise at least three electric capacity, at least two inductance, two noninductive resistances and a switch, wherein, the first electric capacity and the first inductance are connected to form the first series arm, the second electric capacity and the second inductance are connected to form the second series arm, above-mentioned the first series arm and the second series arm are connected to form parallel circuits, above-mentioned parallel circuits one end connecting valve; Be connected the series arm that is formed by two noninductive resistances between the tie point of the tie point of described the first electric capacity and the first inductance and the second electric capacity and the second inductance, the tie point place connects an end of the 3rd electric capacity between above-mentioned two noninductive resistances, and the other end of the 3rd electric capacity connects the other end of described parallel circuits.
Advantage of the present utility model:
The relatively existing filter circuit construction of the utility model, can reduce active loss, improve the filtration efficiency to the characteristic harmonics (odd harmonic or even-order harmonic) of appointment, can prevent that adjacent times harmonic with the specific characteristic harmonic wave (for example: the specific characteristic harmonic wave: 1,3,5 subharmonic, its adjacent times harmonic is: 2,4,6 subharmonic) amplify, can cover the various high order harmonic components of filtering simultaneously.
Description of drawings
Fig. 1 is existing second-order filter circuit structural circuit schematic diagram;
Fig. 2 is existing three rank filter circuit construction circuit theory diagrams;
Fig. 3 is a kind of execution mode filter circuit of the utility model schematic diagram;
Fig. 4 is a kind of filter circuit schematic diagram under the utility model the first execution mode;
Fig. 5 is a kind of filter circuit schematic diagram under the utility model the second execution mode.
Embodiment
Below in conjunction with accompanying drawing execution mode of the present utility model is described further.
Be illustrated in figure 3 as a kind of execution mode electrical network of the utility model filter circuit schematic diagram, comprise at least three capacitor C 1, C2 and C3, at least two inductance L 1 and L2, two noninductive resistance R1 and R2, a K switch, wherein, the first capacitor C 1 and the first inductance L 1 are connected to form the first series arm, the second capacitor C 2 and the second inductance L 2 are connected to form the second series arm, above-mentioned the first series arm and the second series arm formation in parallel parallel circuits, above-mentioned parallel circuits one end connecting valve K; Be connected the series arm that is consisted of by two noninductive resistance R1 and R2 between the tie point b of the tie point a of described the first capacitor C 1 and the first inductance L 1 and the second capacitor C 2 and the second inductance L 2, tie point c place connects an end of the 3rd capacitor C 3, the other end ground connection of the 3rd capacitor C 3 between above-mentioned two noninductive resistance R1 and the R2.
The 1st kind of execution mode of the present utility model wherein, comprises five capacitor C 1, C2, C3, C4 and C5 as shown in Figure 4, three inductance L 1, L2 and L3, four noninductive resistance R1, R2, R3 and R4.Wherein, capacitor C 1 one ends are connected with inductance L 1 one ends and are formed the first branch road, and capacitor C 1 is a with the tie point of inductance L 1; Capacitor C 2 is connected with inductance L 2 and is formed the second branch road, and its tie point is b; Capacitor C 3 is connected with inductance L 3 and is formed the 3rd branch road, and its tie point is e; Above-mentioned three branch roads are connected to form parallel circuits; And between tie point a and tie point b, be connected a series arm that is formed by noninductive resistance R1 and R2; Between tie point b and tie point e, be connected a series arm that is formed by noninductive resistance R3 and R4; Tie point c between described noninductive resistance R1 and R2 connects an end of capacitor C 4, and tie point d connects an end of capacitor C 5, the other end ground connection of above-mentioned capacitor C 4 and C5 between R3 and the R4.A kind of filter circuit construction of present embodiment, simultaneously three kinds of adjacent odd harmonics of filtering or even-order harmonic, for example: 1,3,5 subharmonic or 2,4,6 subharmonic can cover the various high order harmonic components of filtering simultaneously.
The 2nd kind of execution mode of the present utility model comprises seven capacitor C 1, C2, C3, C4, C5, C6 and C7 as shown in Figure 5, four inductance L 1, L2, L3 and L4, six noninductive resistance R1, R2, R3, R4, R5 and R6.Wherein, capacitor C 1 one ends are connected with inductance L 1 one ends and are formed the first branch road, and its tie point is a; Capacitor C 2 is connected with inductance L 2 and is formed the second branch road, and its tie point is b; Capacitor C 3 is connected with inductance L 3 and is formed the 3rd branch road, and its tie point is e; Capacitor C 4 is connected with inductance L 4 and is formed the 4th branch road, and its tie point is g; Above-mentioned four branch roads are connected to form parallel circuits, an end connecting valve K of described parallel circuits; Between above-mentioned tie point a and tie point b, be connected a series arm that is formed by noninductive resistance R1 and R2, between tie point b and tie point e, be connected a series arm that is formed by noninductive resistance R3 and R4, be connected a series arm that is formed by noninductive resistance R5 and R6 between tie point e and the tie point g; Tie point c between described noninductive resistance R1 and the R2 connects an end of capacitor C 5, tie point d connects an end of capacitor C 6 between noninductive resistance R3 and the R4, tie point f connects an end of capacitor C 7, the other end ground connection of above-mentioned capacitor C 5, C6 and C7 between noninductive resistance R5 and the R6.A kind of filter circuit construction of embodiment 2, simultaneously four kinds of adjacent odd harmonics of filtering or even-order harmonic, for example: 1,3,5,7 subharmonic or 2,4,6,8 subharmonic can cover the various high order harmonic components of filtering simultaneously.
Claims (1)
1. electrical network filter circuit construction, comprise at least three electric capacity, at least two inductance, two noninductive resistances and a switch, wherein, the first electric capacity and the first inductance are connected to form the first series arm, the second electric capacity and the second inductance are connected to form the second series arm, above-mentioned the first series arm and the second series arm are connected to form parallel circuits, above-mentioned parallel circuits one end connecting valve; Be connected the series arm that is formed by two noninductive resistances between the tie point of the tie point of described the first electric capacity and the first inductance and the second electric capacity and the second inductance, it is characterized in that: the tie point place connects an end of the 3rd electric capacity between above-mentioned two noninductive resistances, and the other end of the 3rd electric capacity connects the other end of described parallel circuits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205105415U CN202797974U (en) | 2012-09-29 | 2012-09-29 | Power grid filter circuit structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205105415U CN202797974U (en) | 2012-09-29 | 2012-09-29 | Power grid filter circuit structure |
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| Publication Number | Publication Date |
|---|---|
| CN202797974U true CN202797974U (en) | 2013-03-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012205105415U Expired - Lifetime CN202797974U (en) | 2012-09-29 | 2012-09-29 | Power grid filter circuit structure |
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| CN (1) | CN202797974U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102891486A (en) * | 2012-09-29 | 2013-01-23 | 沈阳鼎盛中贝机电设备有限公司 | Power grid filter circuit structure |
-
2012
- 2012-09-29 CN CN2012205105415U patent/CN202797974U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102891486A (en) * | 2012-09-29 | 2013-01-23 | 沈阳鼎盛中贝机电设备有限公司 | Power grid filter circuit structure |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20171114 Address after: 315040, A1, building 2, No. 189, 4 lane, Ningbo high tech Zone, Zhejiang Patentee after: Ningbo Dingsheng middle shellfish Technology Co.,Ltd. Address before: 110006 -2 Lakeside Garden D-1-26-1, No. 183 South five road, Heping District, Liaoning, Shenyang Patentee before: SHENYANG DINGSHENG ZHONGBEI ELECTROMECHANICAL EQUIPMENT Co.,Ltd. |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190117 Address after: 11 006 Jiayuan D-1-26-1, 183-2 Nanwuma Road, Heping District, Shenyang City, Liaoning Province Patentee after: SHENYANG DINGSHENG ZHONGBEI ELECTROMECHANICAL EQUIPMENT Co.,Ltd. Address before: 315040 Building A1, No. 2, Lane 189, Canghai Road, Ningbo High-tech Zone, Zhejiang Province Patentee before: Ningbo Dingsheng middle shellfish Technology Co.,Ltd. |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190214 Address after: 315040 Building A6, No. 2, Lane 189, Canghai Road, Ningbo High-tech Zone, Zhejiang Province Patentee after: Ningbo Dingsheng Zhongbei Environmental Protection and Energy Saving Co.,Ltd. Address before: 11 006 Jiayuan D-1-26-1, 183-2 Nanwuma Road, Heping District, Shenyang City, Liaoning Province Patentee before: SHENYANG DINGSHENG ZHONGBEI ELECTROMECHANICAL EQUIPMENT Co.,Ltd. |
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| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130313 |
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| CX01 | Expiry of patent term |