CN204271646U - With the Active Power Filter-APF of phase sequence self-adaption function - Google Patents
With the Active Power Filter-APF of phase sequence self-adaption function Download PDFInfo
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- CN204271646U CN204271646U CN201420721028.XU CN201420721028U CN204271646U CN 204271646 U CN204271646 U CN 204271646U CN 201420721028 U CN201420721028 U CN 201420721028U CN 204271646 U CN204271646 U CN 204271646U
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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 a kind of Active Power Filter-APF with phase sequence self-adaption function, comprise body, body and nonlinear load are connected in parallel rear formation joint and are connected in three phase network again, have in body: grid-connected phase sequence self-adaption module, it comprises voltage sampling circuit and circuit of testing the phase sequence, voltage sampling circuit is attempted by joint, and for sampling three-phase electrical network two-way primary voltage signal and process; Circuit of testing the phase sequence, its signal input part is connected with the signal output part of voltage sampling circuit, and circuit of testing the phase sequence is for receiving the two-way primary voltage signal after process and producing phase sequential signal after carrying out Phase sequence detection to this signal; Control circuit, the signal input part of control circuit is connected with the signal output part of circuit of testing the phase sequence, and control circuit is for receiving phase sequential signal and producing corresponding pwm signal according to corresponding phase sequential signal; The utility model can when phase sequence wrong, make it normally work by adjustment automatically, thus make its grid-connected to primary voltage without phase sequence requirement, accept any grid-connected primary voltage connection.
Description
Technical field
The utility model relates to a kind of Active Power Filter-APF with phase sequence self-adaption function, is applicable to low voltage electric network power quality controlling field.
Background technology
At present, along with power electronic equipment uses more and more extensive, the harmonic pollution of electric power system is also more and more serious.Because power electronic equipment can realize the effective compensation to harmonic wave, its utilization is also more and more extensive.
Before power electronic equipment is grid-connected, need the phase sequence of detection of grid three-phase voltage, prevent three-phase electricity from crimping the work instead affecting power electronic equipment.But, in most industry occasion, because most equipment is to voltage phase sequence no requirement (NR), thus Field Force pays close attention to few to voltage phase sequence, when associative operation personnel install power electronic equipment, often due to error in judgement, power electronic equipment three-phase phase entry is caused to connect instead, cause power electronic equipment normally to work, and after voltage phase sequence wrong, scene complex work amount of relocating is large; Thus the Active Power Filter-APF that exploitation has phase sequence automatic identification function just has using value very much.
Summary of the invention
Technical problem to be solved in the utility model is the defect overcoming prior art, a kind of Active Power Filter-APF with phase sequence self-adaption function is provided, it can when phase sequence wrong, it is made normally to work by automatically adjusting, thus make its grid-connected to primary voltage without phase sequence requirement, accept any grid-connected primary voltage connection.
The utility model solves the problems of the technologies described above the technical scheme taked: a kind of Active Power Filter-APF with phase sequence self-adaption function, comprises body, and body and nonlinear load are connected in parallel rear formation joint and are connected in three phase network again, have in body:
Grid-connected phase sequence self-adaption module, it comprises voltage sampling circuit and circuit of testing the phase sequence, and voltage sampling circuit is attempted by joint, and for sampling three-phase electrical network two-way primary voltage signal and process; Circuit of testing the phase sequence, its signal input part is connected with the signal output part of voltage sampling circuit, and circuit of testing the phase sequence is for receiving the two-way primary voltage signal after process and producing phase sequential signal after carrying out Phase sequence detection to this signal;
Control circuit, the signal input part of control circuit is connected with the signal output part of circuit of testing the phase sequence, and control circuit is for receiving phase sequential signal and producing corresponding pwm signal according to corresponding phase sequential signal;
IGBT drive circuit, its signal input part is connected with the signal output part of control circuit, for receiving pwm signal and producing corresponding IGBT control signal according to pwm signal;
Power model, it comprises three-phase IGBT inverter bridge circuit and grid-connected Reactor banks, the control signal input of described three-phase IGBT inverter bridge circuit is connected with the signal output part of IGBT drive circuit, three-phase IGBT inverter bridge circuit is for receiving IGBT control signal and making its output voltage phase sequence consistent with three-phase grid voltage phase sequence according to corresponding IGBT control signal, and the AC of described three-phase IGBT inverter bridge circuit is connected with grid-connected Reactor banks rear and is connected to joint.
Further in order to this Active Power Filter-APF can be controlled the need of access electrical network, also there is in body circuit breaker and main contactor circuit, the output of described power model and the input of voltage sampling circuit all by this circuit breaker and main contactor circuit in parallel to joint, described circuit breaker and the control input end of main contactor circuit are connected with a signal output part of control circuit so that circuit breaker and main contactor circuit are opened according to the drive singal of control circuit or closed.
After have employed technique scheme, without the need to staff, grid-connected voltage phase sequence is detected before this Active Power Filter-APF is grid-connected, reduce quantities, reduce engineering cost; If when the grid-connected primary voltage of this Active Power Filter-APF is negative phase-sequence, relocate without the need to scene; This Active Power Filter-APF is to the no requirement (NR) of grid-connected primary voltage phase sequence, and grid-connected primary voltage connection is any, and field connection is convenient, is convenient to widely using of this Active Power Filter-APF, improves power grid quality.
Accompanying drawing explanation
Fig. 1 is the theory diagram of the Active Power Filter-APF of band phase sequence self-adaption function of the present utility model;
Fig. 2 is the connection diagram of grid-connected phase sequence self-adaption module of the present utility model;
Fig. 3 is the circuit connection diagram of power model of the present utility model.
Embodiment
In order to make content of the present utility model more easily be clearly understood, below according to specific embodiment also by reference to the accompanying drawings, the utility model is described in further detail.
As shown in Figures 1 to 3, a kind of Active Power Filter-APF with phase sequence self-adaption function, comprises body, and body and nonlinear load are connected in parallel rear formation joint and are connected in three phase network again, it is characterized in that having in body:
Grid-connected phase sequence self-adaption module, it comprises voltage sampling circuit and circuit of testing the phase sequence, and voltage sampling circuit is attempted by joint, and for sampling three-phase electrical network two-way primary voltage signal and process; Circuit of testing the phase sequence, its signal input part is connected with the signal output part of voltage sampling circuit, and circuit of testing the phase sequence is for receiving the two-way primary voltage signal after process and producing phase sequential signal after carrying out Phase sequence detection to this signal; Circuit of testing the phase sequence is CPLD logical circuit.
Control circuit, the signal input part of control circuit is connected with the signal output part of circuit of testing the phase sequence, and control circuit is for receiving phase sequential signal and producing corresponding pwm signal according to corresponding phase sequential signal;
IGBT drive circuit, its signal input part is connected with the signal output part of control circuit, for receiving pwm signal and producing corresponding IGBT control signal according to pwm signal;
Power model, it comprises three-phase IGBT inverter bridge circuit and grid-connected Reactor banks, the control signal input of described three-phase IGBT inverter bridge circuit is connected with the signal output part of IGBT drive circuit, three-phase IGBT inverter bridge circuit is for receiving IGBT control signal and making its output voltage phase sequence consistent with three-phase grid voltage phase sequence according to corresponding IGBT control signal, and the AC of described three-phase IGBT inverter bridge circuit is connected with grid-connected Reactor banks rear and is connected to joint.
As shown in Figure 1, also there is in body circuit breaker and main contactor circuit, the output of described power model and the input of voltage sampling circuit all by this circuit breaker and main contactor circuit in parallel to joint, described circuit breaker and the control input end of main contactor circuit are connected with a signal output part of control circuit so that circuit breaker and main contactor circuit are opened according to the drive singal of control circuit or closed.
Operation principle of the present utility model is as follows:
Load and body are connected in parallel in electrical network, the opening and closing of circuit breaker and this Active Power Filter-APF of main contactor control circui, and circuit breaker and main contactor circuit are controlled by control circuit, power model by circuit breaker and main contactor circuit in parallel in electrical network, grid-connected phase sequence self-adaption module carries out phase sequence cognition to grid-connected primary voltage, automatic discrimination goes out grid-connected voltage phase sequence, control circuit is according to the phase sequence result differentiated, controlled and guard signal, IGBT control signal is produced again by IGBT drive circuit, make the output voltage phase sequence of three-phase IGBT inverter bridge circuit consistent with grid-connected voltage phase sequence, realize the correct harmonic management of Active Power Filter-APF, thus make Active Power Filter-APF to the no requirement (NR) of grid-connected primary voltage phase sequence, any grid-connected wire leading method, Active Power Filter-APF can normally work, be convenient to field connection.
As shown in Figure 2, grid-connected phase sequence self-adaption module is made up of Uab sampling processing circuit, Ubc sampling processing circuit and circuit of testing the phase sequence, Uab sampling processing circuit, Ubc sampling processing circuit composition voltage sampling circuit, by two-way sampling processing circuit line voltage U ab, Ubc sampled and process, circuit of testing the phase sequence carries out phase sequence cognition to line voltage U ab, the Ubc after process, differentiates that grid-connected voltage phase sequence is positive sequence or is negative phase-sequence.
According to the grid-connected voltage phase sequence situation of differentiation, if when phase sequence is positive sequence, by control circuit again through IGBT drive circuit, obtain IGBT control signal, the output voltage phase sequence of power model is made to be positive sequence, if when phase sequence is negative phase-sequence, by control circuit again through IGBT drive circuit, obtain IGBT control signal, make the output voltage phase sequence of power cell be negative phase-sequence.
By grid-connected phase sequence self-adaption module, control circuit, IGBT drive circuit, obtain IGBT control signal, by reference to the accompanying drawings 3, six power switch IGBT in power model are through orderly IGBT control signal, realize the output of inverter voltage, and the inverter voltage phase sequence exported is consistent with grid-connected voltage phase sequence, then through grid-connected reactor, realize the harmonic current process of Active Power Filter-APF.
Above-described specific embodiment; technical problem, technical scheme and beneficial effect that the utility model solves are further described; be understood that; the foregoing is only specific embodiment of the utility model; be not limited to the utility model; all within spirit of the present utility model and principle, any amendment made, equivalent replacement, improvement etc., all should be included within protection range of the present utility model.
Claims (2)
1. the Active Power Filter-APF with phase sequence self-adaption function, comprises body, and body and nonlinear load are connected in parallel rear formation joint and are connected in three phase network again, it is characterized in that having in body:
Grid-connected phase sequence self-adaption module, it comprises voltage sampling circuit and circuit of testing the phase sequence, and voltage sampling circuit is attempted by joint, and for sampling three-phase electrical network two-way primary voltage signal and process; Circuit of testing the phase sequence, its signal input part is connected with the signal output part of voltage sampling circuit, and circuit of testing the phase sequence is for receiving the two-way primary voltage signal after process and producing phase sequential signal after carrying out Phase sequence detection to this signal;
Control circuit, the signal input part of control circuit is connected with the signal output part of circuit of testing the phase sequence, and control circuit is for receiving phase sequential signal and producing corresponding pwm signal according to corresponding phase sequential signal;
IGBT drive circuit, its signal input part is connected with the signal output part of control circuit, for receiving pwm signal and producing corresponding IGBT control signal according to pwm signal;
Power model, it comprises three-phase IGBT inverter bridge circuit and grid-connected Reactor banks, the control signal input of described three-phase IGBT inverter bridge circuit is connected with the signal output part of IGBT drive circuit, three-phase IGBT inverter bridge circuit is for receiving IGBT control signal and making its output voltage phase sequence consistent with three-phase grid voltage phase sequence according to corresponding IGBT control signal, and the AC of described three-phase IGBT inverter bridge circuit is connected with grid-connected Reactor banks rear and is connected to joint.
2. the Active Power Filter-APF of band phase sequence self-adaption function according to claim 1, it is characterized in that: also there is in body circuit breaker and main contactor circuit, the output of described power model and the input of voltage sampling circuit all by this circuit breaker and main contactor circuit in parallel to joint, described circuit breaker and the control input end of main contactor circuit are connected with a signal output part of control circuit so that circuit breaker and main contactor circuit are opened according to the drive singal of control circuit or closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420721028.XU CN204271646U (en) | 2014-11-25 | 2014-11-25 | With the Active Power Filter-APF of phase sequence self-adaption function |
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| CN201420721028.XU CN204271646U (en) | 2014-11-25 | 2014-11-25 | With the Active Power Filter-APF of phase sequence self-adaption function |
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| CN204271646U true CN204271646U (en) | 2015-04-15 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110932266A (en) * | 2019-12-06 | 2020-03-27 | 辽宁荣信兴业电力技术有限公司 | Power grid signal identification method of star-connected high-voltage high-power electric energy quality control device |
| CN111751631A (en) * | 2020-06-15 | 2020-10-09 | 中冶南方（武汉）自动化有限公司 | Rectifier phase sequence self-adaption method based on two-line voltage sampling |
| CN112366723A (en) * | 2020-11-10 | 2021-02-12 | 许继电源有限公司 | Electric energy quality comprehensive treatment device and method thereof |
-
2014
- 2014-11-25 CN CN201420721028.XU patent/CN204271646U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110932266A (en) * | 2019-12-06 | 2020-03-27 | 辽宁荣信兴业电力技术有限公司 | Power grid signal identification method of star-connected high-voltage high-power electric energy quality control device |
| CN110932266B (en) * | 2019-12-06 | 2023-09-29 | 辽宁荣信电力电子技术有限公司 | Power grid signal identification method of star connection high-voltage high-power quality control device |
| CN111751631A (en) * | 2020-06-15 | 2020-10-09 | 中冶南方（武汉）自动化有限公司 | Rectifier phase sequence self-adaption method based on two-line voltage sampling |
| CN112366723A (en) * | 2020-11-10 | 2021-02-12 | 许继电源有限公司 | Electric energy quality comprehensive treatment device and method thereof |
| CN112366723B (en) * | 2020-11-10 | 2023-03-14 | 许继电源有限公司 | Electric energy quality comprehensive treatment device and method thereof |
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Addressee: Jiangsu Boli Electric Technology Co.,Ltd. patent The person in charge Document name: payment instructions |
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| DD01 | Delivery of document by public notice |