CN108616128A - A kind of circuit structure of grain moisture content determining device - Google Patents
A kind of circuit structure of grain moisture content determining device Download PDFInfo
- Publication number
- CN108616128A CN108616128A CN201810286339.0A CN201810286339A CN108616128A CN 108616128 A CN108616128 A CN 108616128A CN 201810286339 A CN201810286339 A CN 201810286339A CN 108616128 A CN108616128 A CN 108616128A
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- China
- Prior art keywords
- module
- circuit
- bridge arm
- igbt module
- current
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/01—Arrangements for reducing harmonics or ripples
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
- H02J3/1835—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control
- H02J3/1842—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control wherein at least one reactive element is actively controlled by a bridge converter, e.g. active filters
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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
- Y02E40/30—Reactive power compensation
-
- 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
Abstract
The invention discloses a kind of circuit structures of grain moisture content determining device, including device body, described device ontology includes High frequency filter circuit, comprehensively sampling module, DSP control module, compensation current occuring circuit module and human-computer interaction module, device body accesses power grid by access point in parallel set between power grid and load, occupies little space；IGBT switching frequencies are improved, output current ripple is reduced so that output LCL inductance becomes smaller, and the resistance to pressure request of device is low, it can be achieved that higher voltage grade devices；Close-loop control mode is taken, special program is invented, at least can reach requirement of real time by dsp processor, can accurately administer load harmonic and carry out reactive-load compensation, improve power grid quality；It can facilitate and realize multi-machine parallel connection Centralized Monitoring, be installed on easy to maintain, guarantee equipment long-term stable operation under large capacity, complex working condition environment.
Description
Technical field
The present invention relates to idle controlling device, the circuit structure of specifically a kind of grain moisture content determining device.
Background technology
Include power filter device in the circuit of grain moisture content determining device, power filter device currently on the market
It is difficult to realize High-current output；Although taking cabinet type structure that can export high current, occupied space is big, of high cost, is unfavorable for
Batch production and control cost, it has not been convenient to realize that plural parallel stage is run.The topological structure taken when High-current output is
Two level blocks, and the compact modular product of three-level topology structure is taken to be difficult to meet the requirement of High-current output.
The purpose of the present invention is to provide a kind of circuit structures of grain moisture content determining device, to solve above-mentioned background skill
The problem of being proposed in art.
Invention content
To achieve the above object, the present invention provides the following technical solutions：
A kind of circuit structure of grain moisture content determining device, including device body, described device ontology include high frequency filter
Wave circuit, comprehensively sampling module, DSP control module, compensation current occuring circuit module and human-computer interaction module, device body are logical
It crosses access point in parallel set between power grid and load and accesses power grid, be provided on the circuit between access point in parallel and load
Load current mutual inductor；The comprehensively sampling module is connected with load current mutual inductor secondary side output signal, with to load
In load current signal sampling, obtain and export sampled signal；The DSP control module is adopted by signal wire and the synthesis
Egf block connects, and to receive the sampled signal, which carries out A/D conversions, transformed signal through DSP control module
Instruction extraction is carried out into dsp controller, generates simultaneously output drive signal；It includes direct current side to compensate current occuring circuit module
With exchange side, the direct current side is connect with DC bus capacitor group, and the exchange side is connect with the access point in parallel；Institute
Compensation current occuring circuit module is stated to receive and generated according to drive signal opposite, equal-sized with load reactive current polarity
Electric current, and be delivered in circuit through access point in parallel by exchanging side；The human-computer interaction module is connected with DSP control module
It connects.
As a further solution of the present invention：The compensation current occuring circuit module includes three branches, every branch
Road include the fuse for being sequentially connected in series setting, contactor, output current transformer, interior external inductance, pre-charge resistance and
IGBT module, and the DC bus capacitor group that is connected with IGBT module, further include being set between interior inductance and contactor suddenly
That sensor.
As further scheme of the invention：The IGBT module includes upper bridge arm IGBT module and lower bridge arm IGBT moulds
Block, upper bridge arm IGBT module and lower bridge arm IGBT module form topological structure, two DC ports point of upper bridge arm IGBT module
It is not connected with the positive voltage terminal of DC bus capacitor group and DC bus capacitor class mid point voltage end；Two of lower bridge arm IGBT module
DC port is connected with DC bus capacitor class mid point voltage end with negative voltage side respectively, upper bridge arm IGBT module and lower bridge arm
The clamp diode port of IGBT module is connected with N.
As further scheme of the invention：It is both provided with a varistor between any one branch and a ground terminal,
And it is both provided with a varistor between arbitrary two branches.
As further scheme of the invention：Further include that a special High frequency filter returns in compensation current occuring circuit module
Road, any one branch are connect with the High frequency filter circuit.
Compared with prior art, the beneficial effects of the invention are as follows：The present invention occupies little space；IGBT switching frequencies are improved,
Reduce output current ripple so that output LCL inductance becomes smaller, and the resistance to pressure request of device is low, it can be achieved that higher voltage grade devices；It adopts
Close-loop control mode is taken, special program is invented, at least can reach requirement of real time by dsp processor, can accurately administer load
Harmonic wave and progress reactive-load compensation, improve power grid quality；It can facilitate and realize multi-machine parallel connection Centralized Monitoring, be installed on easy to maintain, guarantor
Demonstrate,prove equipment long-term stable operation under large capacity, complex working condition environment.
Description of the drawings
Fig. 1 is a kind of functional block diagram of the circuit structure of grain moisture content determining device of the present invention.
Fig. 2 is a kind of schematic diagram of the circuit structure of grain moisture content determining device of the present invention.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Please refer to Fig.1~2, in the embodiment of the present invention, a kind of circuit structure of grain moisture content determining device, including device
Ontology, described device ontology include High frequency filter circuit, comprehensively sampling module, DSP control module, compensation current occuring circuit mould
Block and human-computer interaction module, device body accesses power grid by access point in parallel set between power grid and load, and couples
It is provided with load current mutual inductor on circuit between access point and load；The comprehensively sampling module and load current mutual inductor two
Secondary side output signal is connected, and to be sampled to the load current signal in load, obtains and exports sampled signal；The DSP controls
Molding block is connect by signal wire with the comprehensively sampling module, and to receive the sampled signal, which controls through DSP
Module carries out A/D conversions, and transformed signal enters dsp controller and carries out instruction extraction, generates simultaneously output drive signal；Compensation
Current occuring circuit module includes that direct current side is connect with side, the direct current side is exchanged with DC bus capacitor group, the friendship
Stream side is connect with the access point in parallel；The compensation current occuring circuit module receives and is generated and born according to drive signal
It carries that reactive current polarity is opposite, equal-sized electric current, and is delivered in circuit through access point in parallel by exchanging side；It is described
Human-computer interaction module is connected with DSP control module.
The compensation current occuring circuit module includes three branches, and every branch includes to be sequentially connected in series setting
Fuse 1, contactor 2, output current transformer 3, interior external inductance 4, pre-charge resistance 7 and IGBT module 8, and with IGBT moulds
The DC bus capacitor group 10 that block 9 connects, further includes the Hall sensor 8 being set between interior inductance and contactor.
The IGBT module includes upper bridge arm IGBT module and lower bridge arm IGBT module, upper bridge arm IGBT module and lower bridge arm
IGBT module forms topological structure, two DC ports of upper bridge arm IGBT module positive voltage terminal with DC bus capacitor group respectively
It is connected with DC bus capacitor class mid point voltage end；Two DC ports of lower bridge arm IGBT module respectively with DC bus capacitor group
Mid-point voltage end is connected with negative voltage side, the clamp diode port and N of upper bridge arm IGBT module and lower bridge arm IGBT module
It is connected.
It is both provided with a varistor 5 between any one branch and a ground terminal, and is respectively provided between arbitrary two branches
There is a varistor 1.
Further include a special High frequency filter circuit in compensation current occuring circuit module, any one branch with the height
Frequency filter circuit 6 connects.
The present invention operation principle be：When comprehensively sampling module is completed to system voltage, load current, source electric current, defeated
Go out electric current, DC voltage and other simulations and the sampling of digital quantity, and sampled signal is transmitted 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 conversions by A/D conversion chips
Transformed data are sent to DSP control module by Serial Peripheral Interface to be handled, it is right that DSP control module passes through
Locking phase is completed in the sampling of system voltage, and reactive current extraction is carried out by FFT, Instantaneous Power Theory to the load current of detection,
Ordering calculation is completed, and compensating instruction signal is formed by closed loop control algorithm according to output electric signal.DSP control module root
It according to compensating instruction signal, is demodulated by SVPWM PWM Algorithms, corresponding PWM drive waveforms is completed, to IGBT module
Driven, with voltage needed for output by outputting inductance formed it is final with load reactive current polarity it is opposite, equal in magnitude
Current value.
Wherein, upper capacitance and lower capacitance form DC bus capacitor group, compensate current occuring circuit module ordering calculation and
SVPWM is completed demodulation part by DSP control module.
In the present invention, filter circuit uses High frequency filter circuit, High frequency filter circuit to complete to including in output current
High frequency ripple be filtered, and what resistance this high-frequency filter circuit does not utilize, cannot generate heat, power factor is very big.
The electric reactive compensating device further includes a drive part, and the drive part with DSP control module by being directly connected to
Driving circuit and the concatenated drive module of driving circuit constitute, the drive module drive control major loop, drive part is completed
Acquisition to the amplification and IGBT malfunctions of drive signal.
The external human-computer interaction module of DSP control module being connect with drive control part, the human-computer interaction module include
Touch screen realizes the visualization of system work, reduces the workload of operator.
Because the present apparatus can also use modularized design, the volume of device reduces, and the space occupied is small, at low cost, can
To realize more used in parallel, plural parallel stage operations, and DC bus capacitor group uses series connection electrolysis capacitance.
The active electric power reactive power compensator of the present invention uses topological structure, IGBT module to take modular i GBT, closed loop
Control, accurately filters out harmonic wave, using modularized design, is easy to extend, multi-machine parallel connection Centralized Monitoring is easy to maintain, is conforming to
It works under the working environment asked, dependable performance is non-maintaining.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Profit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent requirements of the claims
Variation is included within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiment being appreciated that.
Claims (5)
1. a kind of circuit structure of grain moisture content determining device, which is characterized in that including device body, described device ontology packet
Include High frequency filter circuit, comprehensively sampling module, DSP control module, compensation current occuring circuit module and human-computer interaction module, dress
It sets ontology and power grid, the circuit between access point in parallel and load is accessed by access point in parallel set between power grid and load
On be provided with load current mutual inductor；The comprehensively sampling module is connected with load current mutual inductor secondary side output signal；
The DSP control module is connect by signal wire with the comprehensively sampling module；It includes direct current to compensate current occuring circuit module
Side is connect with side, the direct current side is exchanged with DC bus capacitor group, and the exchange side connects with the access point in parallel
It connects；The compensation current occuring circuit module receives and generates, size opposite with load reactive current polarity according to drive signal
Equal electric current, and be delivered in circuit through access point in parallel by exchanging side；The human-computer interaction module controls mould with DSP
Block is connected.
2. intelligent powerless compensation device according to claim 1, which is characterized in that the compensation current occuring circuit module
Include three branches, every branch includes the fuse for being sequentially connected in series setting, contactor, output current transformer, interior
External inductance, pre-charge resistance and IGBT module, and the DC bus capacitor group that is connected with IGBT module, further include being set to interior electricity
Hall sensor between sense and contactor.
3. intelligent powerless compensation device according to claim 2, which is characterized in that the IGBT module includes upper bridge arm
IGBT module and lower bridge arm IGBT module, upper bridge arm IGBT module and lower bridge arm IGBT module form topological structure, upper bridge arm
Two DC ports of IGBT module respectively with the positive voltage terminal of DC bus capacitor group and DC bus capacitor class mid point voltage end phase
Connection；Two DC ports of lower bridge arm IGBT module are connected with DC bus capacitor class mid point voltage end with negative voltage side respectively
It connects, the clamp diode port of upper bridge arm IGBT module and lower bridge arm IGBT module is connected with N.
4. intelligent powerless compensation device according to claim 2, which is characterized in that between any one branch and a ground terminal
It is both provided with a varistor, and a varistor is both provided between arbitrary two branches.
5. intelligent powerless compensation device according to claim 2, which is characterized in that in compensation current occuring circuit module also
Including a special High frequency filter circuit, any one branch is connect with the High frequency filter circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810286339.0A CN108616128A (en) | 2018-04-03 | 2018-04-03 | A kind of circuit structure of grain moisture content determining device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810286339.0A CN108616128A (en) | 2018-04-03 | 2018-04-03 | A kind of circuit structure of grain moisture content determining device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108616128A true CN108616128A (en) | 2018-10-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810286339.0A Pending CN108616128A (en) | 2018-04-03 | 2018-04-03 | A kind of circuit structure of grain moisture content determining device |
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| Country | Link |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001011763A1 (en) * | 1999-08-06 | 2001-02-15 | The Regents Of The University Of California | Unified constant-frequency integration control of three-phase power factor corrected rectifiers, active power filters, and grid-connected inverters |
| CN204720985U (en) * | 2015-06-03 | 2015-10-21 | 湖北追日电气股份有限公司 | A kind of active electric filter device |
| CN108063445A (en) * | 2018-01-24 | 2018-05-22 | 中国矿业大学(北京) | Advanced Static Var Compensator based on Mixed cascading bridge-type convertor circuit |
-
2018
- 2018-04-03 CN CN201810286339.0A patent/CN108616128A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001011763A1 (en) * | 1999-08-06 | 2001-02-15 | The Regents Of The University Of California | Unified constant-frequency integration control of three-phase power factor corrected rectifiers, active power filters, and grid-connected inverters |
| CN204720985U (en) * | 2015-06-03 | 2015-10-21 | 湖北追日电气股份有限公司 | A kind of active electric filter device |
| CN108063445A (en) * | 2018-01-24 | 2018-05-22 | 中国矿业大学(北京) | Advanced Static Var Compensator based on Mixed cascading bridge-type convertor circuit |
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Application publication date: 20181002 |
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