CN202340121U - Output filter circuit of active power filter - Google Patents
Output filter circuit of active power filter Download PDFInfo
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- CN202340121U CN202340121U CN2011205328851U CN201120532885U CN202340121U CN 202340121 U CN202340121 U CN 202340121U CN 2011205328851 U CN2011205328851 U CN 2011205328851U CN 201120532885 U CN201120532885 U CN 201120532885U CN 202340121 U CN202340121 U CN 202340121U
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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
- Y02E40/20—Active power filtering [APF]
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Abstract
The utility model discloses an output filter circuit of an active power filter. Three same filter circuits correspond to three phases A, B and C of a power grid inlet wire; each filter circuit comprises a resistance, capacitance and inductance (RCL) filter, a relay switch, a charging circuit and an overvoltage protection circuit. The output filter circuit is characterized by also comprising an alternating current annular filter inductor, wherein the input end of the alternating current annular filter inductor is connected with the RCL filter to form an L-RCL filter; the output end of the alternating current annular filter inductor is connected with the relay switch; and three-phase wire inlet ends of the L-RCL filters of the filter circuits with the three phases A, B and C are connected with the midpoints of phases A, B and C of an inversion circuit respectively. According to the output filter circuit, the filter effect can be improved effectively.
Description
Technical field
The utility model relates to a kind of output filter circuit unit of in industry and resident living, using towards the active electric filter device of power industry.
Background technology
Along with development of modern industry, increasing electric power electric device is applied in all trades and professions, and the harmonic pollution that power electronic equipment causes is also serious day by day.Active Power Filter-APF is the most important instrument that solves the harmonic pollution problem.But because Active Power Filter-APF itself also is a power electronic equipment; Himself also can produce a certain amount of harmonic wave when operation; Especially near the high order harmonic component of switching frequency, therefore, the designer all can be at output filter of the terminal increase of electric current output of Active Power Filter-APF; Link to each other with electrical network again, utilize output filter to eliminate the high order harmonic component that himself produces.
In existing technology; Because output filter will be through the principal current of whole device; So used device is electric power device, and, all to adopt cable or line row to connect between each device because the electric current that passes through is big; So it is bigger that half institute of output filter takes up space, and is an obstruction for Active Power Filter-APF miniaturization developing direction.Secondly; Because selected device parameters is fixed; So harmonic wave that can only the filtering fixed frequency, and in practical application, the Control Parameter of Active Power Filter-APF can change according to system change; The high order harmonic component that is produced also can change, and the filtration result of output filter will descend under this situation.
The utility model content
The purpose of the utility model is to provide a kind of output filter circuit that can effectively improve the Active Power Filter-APF of filter effect.
The output filter circuit of this Active Power Filter-APF that the utility model provides; Have three tunnel identical filter circuits corresponding to A, B, the C three-phase of electrical network inlet wire; Each road filter circuit all comprises RCL filter, relay switch, charging circuit, overvoltage crowbar, it is characterized in that each road filter circuit also comprises interchange loop filtering inductance, and this interchange loop filtering inductance input and RCL filter are connected to form the L-RCL filter; Output is connected with relay switch; The L-RCL filter three-phase end of incoming cables of A, B, C three-phase filter circuit respectively with the A of inverter circuit mid point mutually, B phase mid point, C phase mid point links to each other.
The output of each L-RCL filter all is connected with a high pass transducer, and (J17), high pass transducer J12, J15, the output of J17 link to each other with the N line of electrical network again for J12, J15.
As an embodiment of the utility model, said output filter circuit unit also comprise 3 Hall current sensors (N1, N2, N3), 3 Hall current sensor (N1; N2, output signal N3) connect 4,5,6 pin of 16 core sockets respectively; 3 Hall current sensors (N1, N2, N3)+the 15V power input connects 2 pin of 16 core sockets, and-15V power input connects 3 pin of 16 core sockets. said high pass transducer (J12; J15, output signal J17) connect 7,8,9 pin of 16 core sockets respectively; High pass transducer J12, J15, J17+the 15V power input connects 2 pin of 16 core sockets, and-15V power input connects 3 pin of 16 core sockets.
Above-mentioned all elements are integrated on the circuit board.
The utility model amplitude-frequency characteristic and quality factor are improved a lot, so the utility model can improve filter effect owing on the basis of prior art RCL filter, increased one-level LC filtering.In addition, the utility model is integrated in all elements on the circuit board, has reduced the volume of output filter so to greatest extent.
Description of drawings
Fig. 1 is the circuit diagram of the utility model.
Embodiment
As can beappreciated from fig. 1 the output filter circuit of the utility model design is by exchanging the L-RCL filter that loop filtering inductance, filter capacitor, power resistor etc. are formed; Voltage, current acquisition transducer; Relay switch; Charging circuit; Overvoltage crowbar is formed.Can be divided into 4 parts;
First: the three-phase end of incoming cables A of L-RCL filter, B, C respectively with the A of inverter circuit mid point mutually, B phase mid point, C phase mid point links to each other; The N phase end of incoming cables of L-RCL filter links to each other with the N line of electrical network.3 exchange loop filtering inductance L 1, L5, L7 one end respectively with relay T3, T4, the outlet of T7 links to each other; The other end then with the A of electrical network mutually, the B phase, C links to each other, the RCL of L-RCL filter partly is that the filter branch by 4 groups of parallel connections constitute, the 1st group by filter capacitor CX1; CX2, CX3 form, and the 2nd group by filter capacitor C2, C8, C16 crosstalk sense L3; L9, L11 form, and the 3rd group by power resistor R3, R15, R19 crosstalk sense L4; L10, L12 form, and the 4th group by power resistor string filter capacitor C19, C20, and C21 forms.
Second portion; 4 groups of parallel connection filter branch outputs forming the L-RCL filter earlier with high pass transducer J12, J15, the J17 input links to each other, high pass transducer J12, J15, the output of J17 link to each other with the N line of electrical network again.Relay T3, T4, the inlet wire of T7 then with electrical network A mutually, the B phase, C is in parallel, and relay T3, T7 respectively with power resistor R1 string fuse FU4, R13 string fuse FU5 parallel connection constitutes charge circuit.
Third part: the output filter circuit unit comprises 3 Hall current sensor N1, N2, N3,3 Hall current sensor N1, N2; The output signal of N3 meets 4,5,6 pin of 16 core sockets, 3 Hall current sensor N1, N2 respectively; N3+the 15V power input connects 2 pin of 16 core sockets, and-15V power input connects 3 pin of 16 core sockets. high pass transducer J12, J15, the output signal of J17 connects 7,8 of 16 core sockets respectively; 9 pin, high pass transducer J12, J15, J17+the 15V power input connects 2 pin of 16 core sockets;-15V power input connects 3 pin of 16 core sockets. and the output filter circuit unit comprises 2 voltage transformer T1, and T2, the primary side of T1 get access to grid A and B mutually, and the primary side of T2 gets access to grid B and C mutually; 11,12 pin of the secondary side joint 16 core sockets of T1,13,14 pin of the secondary side joint 16 core sockets of T2.The increase of filtering current detection sensor has constituted filtering filtering feedback, to the higher harmonic current sample detecting of filtering; Pass to controller to signal, by controller according to the modification of signal Control Parameter, like this; Just can the real-time tracking high order harmonic component change, improve filtering efficient.
The 4th part; The output filter circuit unit comprises overvoltage crowbar, by piezo-resistance R9, and R10, R12 and high pressure ceramic disc capacitor C4, C5, C6 forms.R9 and C4 one end and A are in parallel other end ground connection; R10 and C5 one end and A are in parallel other end ground connection; R12 and C6 one end and A are in parallel other end ground connection.
The utility model output filter is integrated in all elements on the circuit board, selects for use powerful electronic device to replace existing electric device, replaces cable or line row with the lead on the plate, has reduced the volume of output filter to greatest extent.
Claims (4)
1. the output filter circuit of an Active Power Filter-APF; Have three tunnel identical filter circuits corresponding to A, B, the C three-phase of electrical network inlet wire; Each road filter circuit all comprises RCL filter, relay switch, charging circuit, overvoltage crowbar, it is characterized in that each road filter circuit also comprises interchange loop filtering inductance, and this interchange loop filtering inductance input and RCL filter are connected to form the L-RCL filter; Output is connected with relay switch; The L-RCL filter three-phase end of incoming cables of A, B, C three-phase filter circuit respectively with the A of inverter circuit mid point mutually, B phase mid point, C phase mid point links to each other; The N phase end of incoming cables of L-RCL filter is connected with the N line of electrical network.
2. output filter circuit according to claim 1 unit, the output that it is characterized in that each L-RCL filter all is connected with a high pass transducer, and (J17), high pass transducer J12, J15, the output of J17 link to each other with the N line of electrical network again for J12, J15.
3. output filter circuit according to claim 2 unit, it is characterized in that this output filter circuit unit also comprise 3 Hall current sensors (N1, N2, N3); (output signal N3) connects 4,5 of 16 core sockets respectively to 3 Hall current sensors for N1, N2; 6 pin, 3 Hall current sensors (N1, N2, N3)+the 15V power input connects 2 pin of 16 core sockets;-15V power input connects 3 pin of 16 core sockets. and (output signal J17) connects 7 of 16 core sockets respectively to said high pass transducer for J12, J15; 8,9 pin, high pass transducer J12; J15, J17+the 15V power input connects 2 pin of 16 core sockets, and-15V power input connects 3 pin of 16 core sockets.
4. according to the described output filter circuit of one of claim 1-3 unit, it is characterized in that all elements are integrated on the circuit board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205328851U CN202340121U (en) | 2011-12-19 | 2011-12-19 | Output filter circuit of active power filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205328851U CN202340121U (en) | 2011-12-19 | 2011-12-19 | Output filter circuit of active power filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202340121U true CN202340121U (en) | 2012-07-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205328851U Expired - Lifetime CN202340121U (en) | 2011-12-19 | 2011-12-19 | Output filter circuit of active power filter |
Country Status (1)
| Country | Link |
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| CN (1) | CN202340121U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110492485A (en) * | 2019-09-18 | 2019-11-22 | 国网湖南省电力有限公司 | Filter resistor branch protection method, system and medium for double tunning alternating current filter |
-
2011
- 2011-12-19 CN CN2011205328851U patent/CN202340121U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110492485A (en) * | 2019-09-18 | 2019-11-22 | 国网湖南省电力有限公司 | Filter resistor branch protection method, system and medium for double tunning alternating current filter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: Fuzhou Road 411201 in Hunan province Xiangtan City Jiuhua Economic Zone No. 98 Building 9 No. 906 Jiuhua service Patentee after: Weisheng Energy Industrial Technology (Changsha) Co., Ltd. Address before: 410205 Tongzi, Changsha, Changsha hi tech Development Zone, west slope road, No. 468, Patentee before: Changsha Weisheng Energy Industry Technology Co., Ltd. |
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| CX01 | Expiry of patent term |
Granted publication date: 20120718 |
|
| CX01 | Expiry of patent term |