CN204720985U - A kind of active electric filter device - Google Patents
A kind of active electric filter device Download PDFInfo
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- CN204720985U CN204720985U CN201520377308.8U CN201520377308U CN204720985U CN 204720985 U CN204720985 U CN 204720985U CN 201520377308 U CN201520377308 U CN 201520377308U CN 204720985 U CN204720985 U CN 204720985U
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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]
Abstract
The utility model relates to electric and electronic technical field, particularly relates to a kind of active electric filter device.This active electric filter device adopts I type three-level topology structure, main circuit power unit takes I type three level IGBT module, control mode takes closed-loop control, accurate filtering harmonic wave, structure adopts modularized design, is easy to expansion, multi-machine parallel connection centralized monitor, easy to maintenance, work under satisfactory operational environment, dependable performance is non-maintaining.
Description
Technical field
The utility model relates to electric and electronic technical field, particularly relates to a kind of active electric filter device.This active electric filter device adopts I type three-level topology structure, main circuit power unit takes I type three level IGBT module, control mode takes closed-loop control, accurate filtering harmonic wave, structure adopts modularized design, is easy to expansion, multi-machine parallel connection centralized monitor, easy to maintenance, work under satisfactory operational environment, dependable performance is non-maintaining.
Background technology
Along with power electronic device is in the extensive use of industry-by-industry, nonlinear-load quantity grows with each passing day, and the harmonic current that these nonlinear-loads produce can endanger the normal operation of its surrounding devices, causes system voltage Severe distortion, produces serious consequence.
Active electric filter device in the market takes the compact module based on discrete device to be difficult to realize High-current output; Although take cabinet type structure to export big current, take up room large, cost is high, is unfavorable for batch production and controls cost, and is inconvenient to realize plural parallel stage and runs.The topological structure taked when High-current output is two level block, and takes the compact modular product of three-level topology structure to be difficult to meet the requirement of High-current output.
This novel modularized active electric filter device effectively solves above-mentioned deficiency, structurally take modularization hierarchy, major loop takes three level module to carry out multi-machine parallel connection, effectively solve and be difficult to the not enough problem that single module Large Copacity exports under three-level topology structure.
Chinese patent (CN103618312A) describes a kind of active electric filter device, comprise main circuit, signals collecting, control system, drive part and power pack, described main circuit is by the circuit breaker of connecting successively, contactor, filter inductance, instrument transformer and IGBT inverter, the IGBT inverter two ends bus capacitor that is parallel to of the current-limiting resistance and two series connection that are connected in parallel on contactor two ends forms, described signals collecting, control system is connected successively with drive part, described power pack is connected with bus capacitor two ends, and supply to be electrically connected with control system and drive part, the speed-sensitive switch of 20kHz and fly-wheel diode in parallel is provided with in described IGBT inverter, described drive part is parallel with the stagnant chain rate of timing and comparatively feeds back.
Above-mentioned patent does not describe the technical characteristic that relevant major loop adopts I type three-level topology structure.Inversion circuit adopts IGBT half-bridge module and fly-wheel diode to build simultaneously, causes inversion circuit more complicated, easily produces stray inductance influential system performance.
Utility model content
In view of the above problems, the utility model provides a kind of active electric filter device, it is characterized in that, be applied on circuit that electrical network powers to the load, and this device is by access point access electrical network in parallel set between electrical network with load, circuit between access point in parallel and load is provided with load current instrument transformer, and described device comprises:
Comprehensively sampling module, is connected with described load current instrument transformer secondary side output signal, with to the load current signal sampling in described load, obtains and exports sampled signal;
DSP control module, by holding wire and described comprehensively sampling model calling, to receive described sampled signal, this sampled signal carries out A/D conversion through DSP control module, and the signal after conversion enters dsp controller and carries out instruction fetch, generates and output drive signal;
Have the offset current circuit for generating module of DC side and AC, described direct current side is connected with DC capacitor group, and described interchange side is connected with described access point in parallel;
Wherein, described offset current circuit for generating module receives and generates contrary with load harmonic current polarity, equal-sized electric current according to described drive singal, and is delivered in described circuit through described access point in parallel by described interchange side.
Above-mentioned device, it is characterized in that, described offset current circuit for generating module includes three branch roads, every bar branch road includes the fuse, contactor, output current transformer, external inductance, internal inductance and the IGBT module that are arranged in series successively, and the DC bus capacitor group to be connected with described IGBT module, be arranged at the Hall element between described internal inductance and described contactor;
Described IGBT module comprises brachium pontis IGBT module and lower brachium pontis IGBT module, described upper brachium pontis IGBT module and described lower brachium pontis IGBT module composition I type topological structure, two DC port of described upper brachium pontis IGBT module are connected with described DC bus capacitor class mid point voltage end with the positive voltage terminal of described DC bus capacitor group respectively; Two DC port of described lower brachium pontis IGBT module are connected with negative voltage side with described DC bus capacitor class mid point voltage end respectively, and described upper brachium pontis IGBT module is connected with N with the clamp diode port of described lower brachium pontis IGBT module;
Be provided with a piezo-resistance between any branch road and a ground end, and be provided with a piezo-resistance between any two branch roads.
Above-mentioned device, is characterized in that, also comprises a High frequency filter loop in described offset current circuit for generating module, and any branch road is all connected with described High frequency filter loop.
Above-mentioned device, is characterized in that, described device also comprises a drive part, and described drive part is made up of the drive circuit be connected with described DSP control module and the driver module that is connected with IGBT module, and described driver module drives described IGBT power model.
Above-mentioned device, is characterized in that, described IGBT module is I type three level modular i GBT, and described DC bus capacitor group comprises electric capacity and lower electric capacity.
Above-mentioned device, is characterized in that, this device also comprises a human-computer interaction module, and described human-computer interaction module comprises display.
Above-mentioned device, is characterized in that, described active electric filter device allows the AC of multiple stage to be used by access point parallel connection in parallel.
Compared with prior art, the present invention be advantageous in that: take modularization hierarchy, make device compact, take up room little; Take three-level topology structure, improve IGBT switching frequency, reduce output current ripple, make to export LCL inductance and diminish, device withstand voltage requires low, can realize more voltage levels device; Take close-loop control mode, accurately can administer load harmonic and carry out reactive power compensation, improving power grid quality; Can conveniently realize multi-machine parallel connection centralized monitor, be installed on easy to maintenance, ensure equipment long-term stable operation under Large Copacity, complex working condition environment.
Accompanying drawing explanation
Fig. 1 is functional block diagram of the present utility model;
Fig. 2 is schematic diagram of the present utility model.
Embodiment
The technological means realized for making the utility model, creation characteristic, reaching object and effect is easy to understand, below in conjunction with embodiment, setting forth the present invention further.
Active electric filter device is the novel electric power harmonic wave control special equipment adopting modern power electronics technology and make based on the Digital Signal Processing of high-speed dsp device.It is made up of instruction current computing circuit and offset current circuit for generating two major parts.Electric current in instruction current computing circuit real time monitoring circuit, and analog current signal is converted to digital signal, send into high speed digital signal processor (DSP) to process signal, harmonic wave is separated with first-harmonic, and carry out solution tuning offset current circuit for generating with space vector pulse width modulation (SVPWM) and send driving pulse, drive IGBT power model, generate equal with mains by harmonics current amplitude, opposite polarity offset current and inject electrical network, harmonic current compensated or offsets, initiatively eliminating electric harmonic.
As shown in Figure 1 and Figure 2, the utility model is a kind of active electric filter device, be applied on circuit that electrical network powers to the load, and this device is by access point access electrical network in parallel set between electrical network with load, circuit between access point in parallel and load is provided with load current instrument transformer, and described device comprises:
Comprehensively sampling module, is connected with load current instrument transformer secondary side output signal, with to the load current signal sampling in load, obtains and exports sampled signal;
DSP control module, by holding wire and described comprehensively sampling model calling, to receive described sampled signal, this sampled signal carries out A/D conversion through DSP control module, and the signal after conversion enters dsp controller and carries out instruction fetch, generates and output drive signal;
Have the offset current circuit for generating module of DC side and AC, described direct current side is connected with DC capacitor group, and described interchange side is connected with described access point in parallel;
Wherein, described offset current circuit for generating module receives and generates contrary with load harmonic current polarity, equal-sized electric current according to described drive singal, and is delivered in described circuit by described interchange side through described access point in parallel;
Human-computer interaction module, is connected in DSP control module.
Offset current circuit for generating module includes three branch roads, every bar branch road includes the fuse 1, contactor 2, output current transformer 3, interior external inductance 4, pre-charge resistance 7 and the IGBT module 9 that are arranged in series successively, and the DC bus capacitor group 10 to be connected with IGBT module, be arranged at the Hall element 8 between described internal inductance and described contactor;
IGBT module comprises brachium pontis IGBT module and lower brachium pontis IGBT module, upper brachium pontis IGBT module and lower brachium pontis IGBT module composition I type topological structure, two DC port of upper brachium pontis IGBT module are connected with DC bus capacitor class mid point voltage end with the positive voltage terminal of DC bus capacitor group respectively; Two DC port of lower brachium pontis IGBT module are connected with negative voltage side with DC bus capacitor class mid point voltage end respectively, and upper brachium pontis IGBT module is connected with N with the clamp diode port of lower brachium pontis IGBT module;
Be provided with a piezo-resistance 5 between any branch road and a ground end, and be provided with a piezo-resistance 1 between any two branch roads;
Also comprise a High frequency filter loop 6 in offset current circuit for generating module, any branch road is all connected with described High frequency filter loop 6.
When comprehensively sampling module completes system voltage, load current, source electric current, output current, DC voltage and other simulation and the sampling of digital quantity, and sampled signal is sent to DSP control module.
DSP control module completes the conditioning of all sampled signals, and after the analog quantity after conditioning is completed A/D conversion by A/D conversion chip, the data after conversion is sent to DSP process by Serial Peripheral Interface.
DSP control board, by completing phase-locked to the sampling of system voltage, carries out harmonic wave extraction to the load current detected by FFT, Instantaneous Power Theory, completes ordering calculation, and according to the output signal of telecommunication, by closed loop control algorithm, forms compensating instruction signal.DSP control module is according to compensating instruction signal, demodulation is carried out by SVPWM PWM Algorithm, complete corresponding PWM drive waveforms, IGBT module is driven, forms final contrary with load harmonic current polarity, equal-sized current value to export required voltage by outputting inductance.
Wherein, upper electric capacity and lower electric capacity form DC bus capacitor group, and ordering calculation and the SVPWM demodulation part of offset current circuit for generating module are completed by DSP control module.
In the utility model, filter circuit 6 adopts High frequency filter loop, and High frequency filter loop completes carries out filtering to the high frequency ripple comprised in output current.
This power filter device also comprises a drive part, the driver module that this drive part is connected by the drive circuit be directly connected with DSP control module and drive circuit is formed, this driver module drived control major loop, drive part completes the collection of amplification to drive singal and IGBT malfunction.
The external human-computer interaction module of the DSP control module be connected with drive control part, this human-computer interaction module comprises display and keyboard, realizes the visual of system works, decreases the workload of operator.
Because this device have employed modularized design, the volume of active electric power device reduces, and the space taken is little, and cost is low, and can realize multiple stage parallel connection and use, plural parallel stage runs, and DC bus capacitor group adopts series connection electrolysis electric capacity.
Active electric filter device of the present utility model adopts I type three-level topology structure, IGBT module takes I type three level modular i GBT, closed-loop control, accurate filtering harmonic wave, uses modularized design, is easy to expansion, multi-machine parallel connection centralized monitor, easy to maintenance, work under satisfactory operational environment, dependable performance is non-maintaining.
By illustrating and accompanying drawing, giving the exemplary embodiments of the ad hoc structure of embodiment, based on the utility model spirit, also can do other conversion.Although above-mentioned utility model proposes existing better case study on implementation, but these contents are not as limitation.
For a person skilled in the art, after reading above-mentioned explanation, various changes and modifications undoubtedly will be apparent.Therefore, appending claims should regard the whole change and correction of containing true intention of the present utility model and scope as.In Claims scope, the scope of any and all equivalences and content, all should think and still belong in intention of the present utility model and scope.
Claims (8)
1. an active electric filter device, it is characterized in that, be applied on circuit that electrical network powers to the load, and this device is by access point access electrical network in parallel set between electrical network with load, circuit between access point in parallel and load is provided with load current instrument transformer, and described device comprises:
Comprehensively sampling module, is connected with described load current instrument transformer secondary side output signal, with to the load current signal sampling in described load, obtains and exports sampled signal;
DSP control module, by holding wire and described comprehensively sampling model calling, to receive described sampled signal, this sampled signal carries out A/D conversion through DSP control module, and the signal after conversion enters dsp controller and carries out instruction fetch, generates and output drive signal;
Have the offset current circuit for generating module of DC side and AC, described direct current side is connected with DC capacitor group, and described interchange side is connected with described access point in parallel;
Wherein, described offset current circuit for generating module receives and generates contrary with load harmonic current polarity, equal-sized electric current according to described drive singal, and is delivered in described circuit through described access point in parallel by described interchange side.
2. device according to claim 1, it is characterized in that, described offset current circuit for generating module includes three branch roads, every bar branch road includes the fuse, contactor, output current transformer, external inductance, internal inductance and the IGBT module that are arranged in series successively, and the DC bus capacitor group to be connected with described IGBT module, be arranged at the Hall element between described internal inductance and described IGBT module;
Described IGBT module comprises brachium pontis IGBT module and lower brachium pontis IGBT module, described upper brachium pontis IGBT module and described lower brachium pontis IGBT module composition I type topological structure, two DC port of described upper brachium pontis IGBT module are connected with described DC bus capacitor class mid point voltage end with the positive voltage terminal of described DC bus capacitor group respectively; Two DC port of described lower brachium pontis IGBT module are connected with negative voltage side with described DC bus capacitor class mid point voltage end respectively, and described upper brachium pontis IGBT module is connected with N with the clamp diode port of described lower brachium pontis IGBT module;
Be provided with a piezo-resistance between any branch road and a ground end, and be provided with a piezo-resistance between any two branch roads.
3. device according to claim 2, is characterized in that, also comprises a High frequency filter loop in described offset current circuit for generating module, and any branch road is all connected with described High frequency filter loop.
4. device according to claim 2, it is characterized in that, described device also comprises a drive part, and described drive part is made up of the drive circuit be connected with described DSP control module and the driver module that is connected with IGBT module, and described driver module drives described IGBT power model.
5. device according to claim 2, is characterized in that, described IGBT module is I type three level modular i GBT.
6. device according to claim 2, is characterized in that, described DC bus capacitor group comprises electric capacity and lower electric capacity.
7. device according to claim 1, is characterized in that, this device also comprises a human-computer interaction module, and described human-computer interaction module comprises display.
8. device according to claim 1, is characterized in that, described active electric filter device allows multiple stage parallel connection to use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520377308.8U CN204720985U (en) | 2015-06-03 | 2015-06-03 | A kind of active electric filter device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520377308.8U CN204720985U (en) | 2015-06-03 | 2015-06-03 | A kind of active electric filter device |
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| CN204720985U true CN204720985U (en) | 2015-10-21 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105515026A (en) * | 2016-01-07 | 2016-04-20 | 山东邦世电气有限公司 | Hybrid electric balancer based on combination of passive zero sequence filtering technology and active filtering technology |
| CN108616128A (en) * | 2018-04-03 | 2018-10-02 | 青岛农业大学 | A kind of circuit structure of grain moisture content determining device |
| CN109617074A (en) * | 2018-12-11 | 2019-04-12 | 深圳市创兴建设股份有限公司 | The administering method and device of medium-frequency harmonic in a kind of low frequency environments |
-
2015
- 2015-06-03 CN CN201520377308.8U patent/CN204720985U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105515026A (en) * | 2016-01-07 | 2016-04-20 | 山东邦世电气有限公司 | Hybrid electric balancer based on combination of passive zero sequence filtering technology and active filtering technology |
| CN108616128A (en) * | 2018-04-03 | 2018-10-02 | 青岛农业大学 | A kind of circuit structure of grain moisture content determining device |
| CN109617074A (en) * | 2018-12-11 | 2019-04-12 | 深圳市创兴建设股份有限公司 | The administering method and device of medium-frequency harmonic in a kind of low frequency environments |
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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: 20221117 Address after: 441000 No. 59, Guanyu Road, Tuanshan Town, Xiangyang High tech Development Zone, Hubei Province Patentee after: Hubei Chasri New Energy Technology Co.,Ltd. Address before: 441104 No. 1, Zhuiri Road, Xiangyang Hi tech Industrial Development Zone, Xiangfan City, Hubei Province Patentee before: HUBEI SURPASS SUN ELECTRIC Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 441000 No. 59, Guanyu Road, Tuanshan Town, Xiangyang High tech Development Zone, Hubei Province Patentee after: Borg Warner New Energy (Xiangyang) Co.,Ltd. Address before: 441000 No. 59, Guanyu Road, Tuanshan Town, Xiangyang High tech Development Zone, Hubei Province Patentee before: Hubei Chasri New Energy Technology Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |