CN105633968A - Safe and reliable active power filtering device of smart power grid - Google Patents
Safe and reliable active power filtering device of smart power grid Download PDFInfo
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- CN105633968A CN105633968A CN201610179655.9A CN201610179655A CN105633968A CN 105633968 A CN105633968 A CN 105633968A CN 201610179655 A CN201610179655 A CN 201610179655A CN 105633968 A CN105633968 A CN 105633968A
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- 238000001914 filtration Methods 0.000 title claims abstract description 77
- 238000000034 method Methods 0.000 claims abstract description 11
- 238000012545 processing Methods 0.000 claims abstract description 10
- 238000005070 sampling Methods 0.000 claims abstract description 7
- 238000006243 chemical reaction Methods 0.000 claims description 21
- 230000015271 coagulation Effects 0.000 claims description 19
- 238000005345 coagulation Methods 0.000 claims description 19
- 238000013022 venting Methods 0.000 claims description 12
- 238000005452 bending Methods 0.000 claims description 10
- 238000011002 quantification Methods 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims description 4
- 238000012937 correction Methods 0.000 claims description 3
- 230000002452 interceptive effect Effects 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 4
- 238000001816 cooling Methods 0.000 abstract description 3
- 238000013139 quantization Methods 0.000 abstract 1
- 230000005855 radiation Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 2
- 238000011946 reduction process Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 230000003245 working effect Effects 0.000 description 2
- 238000005273 aeration Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 208000002925 dental caries Diseases 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
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
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/02—Details
- H05K5/0213—Venting apertures; Constructional details thereof
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/02—Details
- H05K5/0217—Mechanical details of casings
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/02—Details
- H05K5/0217—Mechanical details of casings
- H05K5/0234—Feet; Stands; Pedestals, e.g. wheels for moving casing on floor
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
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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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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Power Engineering (AREA)
- Power Conversion In General (AREA)
Abstract
The invention discloses a safe and reliable active power filtering device of a smart power grid. The safe and reliable active power filtering device comprises an external shell (1) and a filtering device body (2) installed in the external shell (1). Heat generated by the filtering device body can be taken away so as to cool the filtering device to prolong the service life of the filtering device; and in addition, the evenness of air which is supplemented from a lower cavity in an upper cavity in the working process of the filtering device is guaranteed to a large extent so as to improve the cooling evenness of the active power filtering device, and the active power filtering device has a simple structure and is practical. Meanwhile, an FPGA (Field Programmable Gate Array) which has a high-speed hardware parallel algorithm and high working efficiency is used as a hardware data processing circuit constructed in a master control chip to carry out quantization processing, digital filtering and amplitude limiting processing on sampling data, and the whole structure has the characteristics of being scientific and reasonable, advanced in technology, timely in compensation and high in stability and the like, and precisely filters harmonic wave and the like.
Description
Technical field
The present invention relates to a kind of safe and reliable intelligent grid active electric filter device.
Background technology
Active power filtering device (APF:Activepowerfilter) is a kind of for dynamic harmonic wave, the novel electric power electric device of compensating reactive power, the harmonic wave of different size and frequency can be carried out quick tracing compensation by it, why it is called active, it is relative to passive LC filter, can only the harmonic wave of Passive intake fixed frequency and size, APF can by sampling load current and carry out each harmonic and be separated with idle, control and the size of active outward current, frequency and phase place, and respond fast, phase induced current in payment load, achieve dynamic tracing compensation, and not only can mend harmonic wave but also mend idle and uneven. controllable power semiconductor is utilized to inject the electric current contrary with humorous wave source current amplitude equal phase to electrical network, the total harmonic current making power supply is zero object reaching real-Time Compensation harmonic current, and existing wave filter is made up of instruction current arithmetical circuit and offset current generation circuit two major portions. analog current signal is also converted to numerary signal and sends into high speed numerical processor DSP and processed by signal by electric current in the real-time monitoring wire of instruction current arithmetical circuit, by harmonic wave base wavelength-division from and send driving pulse with pulsed modulation signal form to offset current generation circuit and drive IGBT power model growth mains by harmonics current amplitude.
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art, it is provided that a kind of safe and reliable intelligent grid active electric filter device.
It is an object of the invention to be achieved through the following technical solutions: a kind of safe and reliable intelligent grid active electric filter device, comprise the filtering device body of outer hull and enclosure interior mounted externally, the transverse section of described outer hull is rounded, the inside of outer hull is divided into upper cavity and lower cavity two portions by a horizontal baffle, wherein said filtering device body is arranged in cavity, the upper end of the outer hull relative with described upper cavity is provided with venting port, and the outer hull relative with described lower cavity is provided with one group of inlet pipe; Described inlet pipe comprises horizontal part respectively, and be arranged on first bend of horizontal part one end and be arranged on the 2nd bend of the horizontal part the other end, 2nd crooked position is in outer hull, first crooked position is outside outer hull, the opening of the air outlet of each 2nd bend is towards same circumferential direction, and the opening of the air outlet of each first bend is straight down; Being provided with on horizontal baffle between filtering device body and the sidewall of described outer hull for being connected cavity and the communicating aperture of lower cavity, described communicating aperture is uniformly distributed; Described filtering device body comprise FPGA master control chip and A D conversion circuit, described FPGA master control chip and A D conversion circuit be connected; Described FPGA master control chip internal is provided with coagulation circuit, harmonic reduction circuit and modulation circuit, described A the output terminal of D conversion circuit be connected with coagulation circuit, the output terminal of described coagulation circuit is connected with harmonic reduction circuit, and the output terminal of described modulation circuit is connected with harmonic reduction circuit; Wherein, coagulation circuit be used for by through A the D conversion circuit sampling data that are converted to numerary signal carry out quantification treatment, digital filtering and amplitude limiting processing; Harmonic reduction circuit, connects coagulation circuit, for the limited signal that coagulation circuit exports is carried out harmonic reduction, and by harmonic wave and base wavelength-division from; Modulation circuit, connect harmonic reduction circuit, for sending driving pulse with pulse-width modulation PWM signal form to offset current generation circuit, drive exterior I GBT power model, generate offset current equal with mains by harmonics current amplitude, opposite polarity and inject electrical network, harmonic current is compensated or offsets, initiatively eliminate electric harmonic.
The opening direction level of the air outlet of the 2nd described bend, and tangent with the inner side-wall of outer hull.
Described venting port is provided with vent fan.
The outer of the top cover of described outer hull is provided with the bending plate for rain cover, and described bending plate tilts obliquely.
The lower end of described outer hull is provided with to have and takes turns from the walking of lock function.
The diameter of described communicating aperture is 1cm, and the distance between the two communicating aperture hole hearts is 2.5cm.
Also being provided with microprocessor in described FPGA master control chip, described microprocessor connects harmonic reduction circuit; Wherein, microprocessor is used for carrying out the process of each electricity parameter display and human-computer interactive control process, and is connected with display port with PORT COM.
Described filtering device body also comprise with A the signal treatment circuit that is connected of the input terminus of D conversion circuit, the voltage signal gathered by electrical network and load current signal through signal treatment circuit carry out signal amplify and Shape correction in order to be transferred to A D conversion circuit carry out high speed A D conversion.
Described filtering device body also comprises and the driving circuit being connected in turn, inversion circuit and filtering circuit, and the input terminus of described driving circuit is connected with modulation circuit; Wherein, by described driving circuit, pwm pulse is amplified to the level needed for exterior I GBT power model by the modulation PWM pulse that produces of circuit; The pwm pulse exported by driving circuit generates offset current equal with mains by harmonics current amplitude, opposite polarity through the modulation of described inversion circuit; Filtering circuit described in utilization is by offset current medium-high frequency carrier current filtering so that the offset current injecting electrical network from filtering circuit is entirely mains by harmonics current amplitude offset current equal, opposite polarity.
Described inversion circuit is IGBT inversion circuit.
The invention has the beneficial effects as follows:
(1) inner chamber of outer hull is divided into upper and lower two cavitys by horizontal baffle by the present invention, and filtering device body is arranged in upper cavity, and it is provided with venting port in the upper end of the outer hull relative with upper cavity, the outer hull relative with lower cavity is provided with one group of inlet pipe; During use, gas in filtering device body and upper cavity carries out heat exchange, gas in upper cavity is temperature rising after the heat exchange, discharged by venting port afterwards, now go up and in cavity, form negative pressure district, gas in lower cavity upwards fills in cavity, cavity is descended to become negative pressure district afterwards, gas outside outer hull fills in lower cavity by each inlet pipe endlessly, so move in circles, the heat that filtering device body produces is taken away, thus is the cooling of filtering device, and then increase the work-ing life of filtering device.
(2) inlet pipe of the present invention comprises horizontal part respectively, and be arranged on first bend of horizontal part one end and be arranged on the 2nd bend of the horizontal part the other end, 2nd crooked position is in housing, first crooked position is outside housing, the opening of the air outlet of each 2nd bend is towards same circumferential direction, the outside air filled into through inlet pipe forms a vortex in lower cavity, described vortex produces a kind of suction, thus it is convenient in cavity under the inspiration more fast of the air outside outer hull, and then be convenient to lower cavity and be able to quick aerification, to meet the heat exchange demand in upper cavity.
(3) the present invention is provided with for being connected cavity and the communicating aperture of lower cavity on the horizontal baffle between filtering device body and the sidewall of described housing, described communicating aperture is uniformly distributed, this ensure that in filtering device working process to a great extent, the homogeneity of the gas filled into from lower cavity in upper cavity, thus improve the homogeneity of active electric filter device heat radiation, structure is simple, comparatively practical.
(4) outer of the top cover of the outer hull of the present invention is provided with the bending plate for rain cover, and described bending plate tilts obliquely, the use of rain visor, can prevent rainy day rainwater from entering filtering device to a certain extent, structure simply, comparatively practical.
(5) sampling data are carried out quantification treatment by the hardware data processing circuit that the present invention utilizes the FPGA with high-speed hardware parallel algorithm and high operate frequency to build for master control chip internal, digital filtering and amplitude limiting processing, also driving pulse is sent with pulse-width modulation PWM signal form to offset current generation circuit in time again through harmonic reduction process, drive IGBT inversion circuit, generate equal with mains by harmonics current amplitude, opposite polarity offset current injects electrical network, carry out harmonic current compensating timely or offsetting, initiatively eliminate electric harmonic, whole structure has scientific and reasonable, advanced technology, compensate in time, stability height, the features such as accurate filtering harmonic wave.
(6) modulation circuit of the present invention can send driving pulse with pulse-width modulation PWM pulse form to offset current generation circuit, has noise resistivity superpower and influence of noise can be reduced to minimum advantage.
Accompanying drawing explanation
Fig. 1 is outer hull structural representation of the present invention;
Fig. 2 is the 2nd bend schematic diagram;
Fig. 3 is filtering device body functional block diagram;
In figure, 1-outer hull, 2-filtering device body, 3-horizontal baffle, the upper cavity of 4-, cavity under 5-, 6-venting port, 7-communicating aperture, 8-inlet pipe, 81-first bend, 82-the 2nd bend, 9-top cover, 10-bending plate, 11-vent fan, 12-walks wheel.
Embodiment
The technical scheme of the present invention is described in further detail below in conjunction with accompanying drawing:
As depicted in figs. 1 and 2, a kind of safe and reliable intelligent grid active electric filter device, comprise outer hull 1 and the filtering device body 2 of housing mounted externally 1 inside, the transverse section of described outer hull 1 is rounded, the inside of outer hull 1 is divided into upper cavity 4 and lower cavity 5 two portions by a horizontal baffle 3, wherein said filtering device body 2 is arranged in cavity 4, the upper end of the outer hull 2 relative with described upper cavity 4 is provided with venting port 6, and the outer hull 1 relative with described lower cavity 5 is provided with one group of inlet pipe 8; Described inlet pipe 8 comprises horizontal part respectively, and be arranged on first bend 81 of horizontal part one end and be arranged on the 2nd bend 82 of the horizontal part the other end, 2nd bend 82 is positioned at outer hull 1, first bend 81 is positioned at outside outer hull 1, the opening of the air outlet of each 2nd bend 82 is towards same circumferential direction, and the opening of the air outlet of each first bend 81 is straight down; Being provided with on horizontal baffle 3 between filtering device body 2 and the sidewall of described outer hull 1 for being connected cavity 4 and the communicating aperture 7 of lower cavity 5, described communicating aperture 7 is uniformly distributed.
The opening direction level of the air outlet of the 2nd described bend 82, and tangent with the inner side-wall of outer hull 1. The diameter of described communicating aperture 7 is 1cm, and the distance between the two communicating aperture 7 hole hearts is 2.5cm. This ensure that in filtering device working process to a great extent, the homogeneity of the gas filled into from lower cavity 5 in upper cavity 4, thus improves the homogeneity of active electric filter device heat radiation, and structure is simple, comparatively practical.
During use, filtering device body 2 carries out heat exchange with the gas in upper cavity 4, gas in upper cavity 4 is temperature rising after the heat exchange, discharged by venting port 6 afterwards, now go up and in cavity 4, form negative pressure district, gas in lower cavity 5 upwards fills in cavity 4, descends cavity 5 to become negative pressure district afterwards, and the gas outside outer hull 1 is filled in lower cavity 5 endlessly by each inlet pipe 8. In the process of filtering device work, in upper cavity 4, gas after heat exchange is constantly discharged by venting port 6, gas in lower cavity 5 constantly fills in cavity 4, and the air outside outer hull 1 constantly fills in lower cavity 5, so move in circles, the heat that filtering device body 2 produces is taken away, thus is the cooling of filtering device, and then increase the work-ing life of filtering device. Wherein, the outside air filled into through each inlet pipe 8 forms a vortex in lower cavity 5, air outside outer hull 1 is under the suction of above-mentioned vortex, fill into lower cavity 5 more fast, and then be convenient to lower cavity 5 and be able to be full of fast, so that the uninterrupted heat exchange demand met in upper cavity 4, and then improve the heat radiation efficiency of filtering device.
Filtering device body 2 is arranged on horizontal baffle 3, and in order to improve the heat radiation efficiency of filtering device, the horizontal baffle 3 of the present invention between the bottom of filtering device body 2 and outer hull 1 is also provided with through hole, and in the present embodiment, the through hole on above-mentioned horizontal baffle 3 and the communicating aperture 7 on horizontal baffle 3 are of similar shape and size. Wherein, the use of above-mentioned through hole, increases the contact area between gas and filtering device body 2, thus improves the heat radiation efficiency of filtering device to a certain extent.
The outer of the top cover 9 of the outer hull 1 of described active electric filter device is provided with the bending plate 10 for rain cover, described bending plate 10 tilts obliquely, when the present invention is used for outdoor, described bending plate 10 can be used for as filtering device keeps off the rain, it is particularly useful for preventing rainwater from entering in filtering device by venting port 6, structure is simple, comparatively practical; The lower end of the outer hull 1 of the active electric filter device described in present embodiment is provided with the walking wheel 12 having from lock function, not only it is convenient to according to the quick mobile filter device of actual needs, and when filtering device is moved to desired position, only carry out lock by the locking means of walking wheel 12, thus filtering device is fixed on certain suitable position; In addition, in the present embodiment, described venting port 6 is provided with vent fan 11, the use of vent fan 11, accelerates the speed that in filtering device outer hull 1, air-flow exchanges further, and then further increase the heat radiation efficiency of filtering device.
As shown in Figure 3, described filtering device body 2 comprise FPGA master control chip and A D conversion circuit, described FPGA master control chip and A D conversion circuit be connected, described FPGA master control chip internal is provided with coagulation circuit, harmonic reduction circuit and modulation circuit, described A the output terminal of D conversion circuit be connected with coagulation circuit, the output terminal of described coagulation circuit is connected with harmonic reduction circuit, and the output terminal of described modulation circuit is connected with harmonic reduction circuit, wherein, coagulation circuit be used for by through A the D conversion circuit sampling data that are converted to numerary signal carry out quantification treatment, digital filtering and amplitude limiting processing, harmonic reduction circuit, connects coagulation circuit, for the limited signal that coagulation circuit exports is carried out harmonic reduction, and by harmonic wave and base wavelength-division from, modulation circuit, connect harmonic reduction circuit, for sending driving pulse with pulse-width modulation PWM signal form to offset current generation circuit, drive exterior I GBT power model, generate offset current equal with mains by harmonics current amplitude, opposite polarity and inject electrical network, harmonic current is compensated or offsets, initiatively eliminate electric harmonic. utilize the FPGA master control chip internal with high-speed hardware parallel algorithm and high operate frequency by coagulation circuit, harmonic reduction circuit, sampling data are carried out quantification treatment by the data acquisition processing circuit carried with modulation circuit, digital filtering and amplitude limiting processing, also driving pulse is sent with pulse-width modulation PWM signal form to offset current generation circuit in time again through harmonic reduction process, drive IGBT inversion circuit, generate equal with mains by harmonics current amplitude, opposite polarity offset current injects electrical network, carry out harmonic current compensating timely or offsetting, initiatively eliminate electric harmonic, whole structure has scientific and reasonable, advanced technology, compensate in time, stability height, the features such as accurate filtering harmonic wave.
Also being provided with microprocessor in described FPGA master control chip, described microprocessor connects harmonic reduction circuit; Wherein, microprocessor is used for carrying out the process of each electricity parameter display and human-computer interactive control process, and is connected with display port with PORT COM. Utilize PORT COM and man-machine interaction assembly to link up, and by display port, each electricity parameter after FPGA master control chip processes is outputted to and shows on display equipment.
Described filtering device body also comprise with A the signal treatment circuit that is connected of the input terminus of D conversion circuit, the voltage signal gathered by electrical network and load current signal through signal treatment circuit carry out signal amplify and Shape correction in order to be transferred to A D conversion circuit carry out high speed A D conversion.
Described filtering device body also comprises and the driving circuit being connected in turn, inversion circuit and filtering circuit, and the input terminus of described driving circuit is connected with modulation circuit; Wherein, by described driving circuit, pwm pulse is amplified to the level needed for exterior I GBT power model by the modulation PWM pulse that produces of circuit; The pwm pulse exported by driving circuit generates offset current equal with mains by harmonics current amplitude, opposite polarity through the modulation of described inversion circuit; Filtering circuit described in utilization is by offset current medium-high frequency carrier current filtering so that the offset current injecting electrical network from filtering circuit is entirely mains by harmonics current amplitude offset current equal, opposite polarity.
Described inversion circuit is IGBT inversion circuit. IGBT (InsulatedGateBipolarTransistor), insulated gate bipolar transistor npn npn, the compound full-control type voltage driven type power semiconductor being made up of BJT (double pole triode) and MOS (insulating gate type field effect tube), has the high input impedance of MOSFET and the advantage of low conduction voltage drop two aspect of GTR concurrently. Have that driving power is little than other power tubes, outward current is big, voltage breakdown height, operating frequency advantages of higher.
Claims (10)
1. a safe and reliable intelligent grid active electric filter device, comprise outer hull (1) and the filtering device body (2) of housing mounted externally (1) inside, it is characterized in that: the transverse section of described outer hull (1) is rounded, the inside of outer hull (1) is divided into cavity (4) and lower cavity (5) two portions by a horizontal baffle (3), wherein said filtering device body (2) is arranged in cavity (4), the upper end of the outer hull (1) relative with described upper cavity (4) is provided with venting port (6), the outer hull (1) relative with described lower cavity (5) is provided with one group of inlet pipe (8), described inlet pipe (8) comprises horizontal part respectively, and be arranged on first bend (81) of horizontal part one end and be arranged on the 2nd bend (82) of the horizontal part the other end, 2nd bend (82) is positioned at outer hull (1), first bend (81) is positioned at outer hull (1) outward, the opening of the air outlet of each 2nd bend (82) is towards same circumferential direction, and the opening of the air outlet of each first bend (81) is straight down, the horizontal baffle (3) being positioned between filtering device body (2) and the sidewall of described outer hull (1) is provided with the communicating aperture (7) for being connected upper cavity (4) and lower cavity (5), and described communicating aperture (7) is uniformly distributed, described filtering device body (2) comprise FPGA master control chip and A D conversion circuit, described FPGA master control chip and A D conversion circuit be connected, described FPGA master control chip internal is provided with coagulation circuit, harmonic reduction circuit and modulation circuit, described A the output terminal of D conversion circuit be connected with coagulation circuit, the output terminal of described coagulation circuit is connected with harmonic reduction circuit, and the output terminal of described modulation circuit is connected with harmonic reduction circuit, wherein, coagulation circuit be used for by through A the D conversion circuit sampling data that are converted to numerary signal carry out quantification treatment, digital filtering and amplitude limiting processing, harmonic reduction circuit, connects coagulation circuit, for the limited signal that coagulation circuit exports is carried out harmonic reduction, and by harmonic wave and base wavelength-division from, modulation circuit, connect harmonic reduction circuit, for sending driving pulse with pulse-width modulation PWM signal form to offset current generation circuit, drive exterior I GBT power model, generate offset current equal with mains by harmonics current amplitude, opposite polarity and inject electrical network, harmonic current is compensated or offsets, initiatively eliminate electric harmonic.
2. a kind of safe and reliable intelligent grid active electric filter device according to claim 1, it is characterised in that: the opening direction level of the air outlet of the 2nd described bend (82), and tangent with the inner side-wall of housing.
3. a kind of safe and reliable intelligent grid active electric filter device according to claim 1, it is characterised in that: described venting port (6) is provided with vent fan (11).
4. a kind of safe and reliable intelligent grid active electric filter device according to claim 1, it is characterized in that: the outer of the top cover (9) of described outer hull (1) is provided with the bending plate for rain cover (10), described bending plate (10) tilts obliquely.
5. a kind of safe and reliable intelligent grid active electric filter device according to claim 1, it is characterised in that: the lower end of described outer hull (1) is provided with to have and takes turns (12) from the walking of lock function.
6. a kind of safe and reliable intelligent grid active electric filter device according to claim 1, it is characterised in that: the diameter of described communicating aperture is 1cm, and the distance between the two communicating aperture hole hearts is 2.5cm.
7. a kind of safe and reliable intelligent grid active electric filter device according to claim 1, it is characterised in that: being also provided with microprocessor in described FPGA master control chip, described microprocessor connects harmonic reduction circuit; Wherein, microprocessor is used for carrying out the process of each electricity parameter display and human-computer interactive control process, and is connected with display port with PORT COM.
8. a kind of safe and reliable intelligent grid active electric filter device according to claim 1, it is characterized in that: described filtering device body also comprise with A the signal treatment circuit that is connected of the input terminus of D conversion circuit, the voltage signal gathered by electrical network and load current signal through signal treatment circuit carry out signal amplify and Shape correction in order to be transferred to A D conversion circuit carry out high speed A D conversion.
9. a kind of safe and reliable intelligent grid active electric filter device according to claim 1, it is characterized in that: described filtering device body also comprises and the driving circuit being connected in turn, inversion circuit and filtering circuit, the input terminus of described driving circuit is connected with modulation circuit; Wherein, by described driving circuit, pwm pulse is amplified to the level needed for exterior I GBT power model by the modulation PWM pulse that produces of circuit; The pwm pulse exported by driving circuit generates offset current equal with mains by harmonics current amplitude, opposite polarity through the modulation of described inversion circuit; Filtering circuit described in utilization is by offset current medium-high frequency carrier current filtering so that the offset current injecting electrical network from filtering circuit is entirely mains by harmonics current amplitude offset current equal, opposite polarity.
10. a kind of safe and reliable intelligent grid active electric filter device according to claim 9, it is characterised in that: described inversion circuit is IGBT inversion circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610179655.9A CN105633968A (en) | 2016-03-28 | 2016-03-28 | Safe and reliable active power filtering device of smart power grid |
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| CN201610179655.9A CN105633968A (en) | 2016-03-28 | 2016-03-28 | Safe and reliable active power filtering device of smart power grid |
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Cited By (8)
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| CN105939015A (en) * | 2016-06-24 | 2016-09-14 | 南通华为电力设备有限公司 | Low-energy consumption active power filter |
| CN106102370A (en) * | 2016-06-29 | 2016-11-09 | 宁波三龙电气有限公司 | Regulator cubicle |
| CN106208065A (en) * | 2016-08-29 | 2016-12-07 | 黄�俊 | A kind of high pressure harmonic filter being prone to heat radiation |
| CN106231876A (en) * | 2016-08-29 | 2016-12-14 | 钟苡苇 | A kind of high pressure harmonic management wave filter protection against the tide heat abstractor |
| CN106304792A (en) * | 2016-09-17 | 2017-01-04 | 冯占飞 | A kind of high pressure harmonic management wave filter cooling device |
| CN108337861A (en) * | 2018-02-22 | 2018-07-27 | 德清利维通讯科技股份有限公司 | Filter protection device |
| WO2022063504A1 (en) * | 2020-09-24 | 2022-03-31 | Rolf Eggers | Air cooling assembly for cooling electronic components |
| US20220117097A1 (en) * | 2019-01-15 | 2022-04-14 | Safran Electrical & Power | Protection device for electrical cabinet |
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| CN203707781U (en) * | 2014-03-12 | 2014-07-09 | 兴盛电器股份有限公司 | Active filter |
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| CN106231876A (en) * | 2016-08-29 | 2016-12-14 | 钟苡苇 | A kind of high pressure harmonic management wave filter protection against the tide heat abstractor |
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Application publication date: 20160601 |