CN202737465U - Low-voltage active filtering controller - Google Patents
Low-voltage active filtering controller Download PDFInfo
- Publication number
- CN202737465U CN202737465U CN2012204089684U CN201220408968U CN202737465U CN 202737465 U CN202737465 U CN 202737465U CN 2012204089684 U CN2012204089684 U CN 2012204089684U CN 201220408968 U CN201220408968 U CN 201220408968U CN 202737465 U CN202737465 U CN 202737465U
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- dsp
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- end dsp
- power
- voltage active
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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 discloses a low-voltage active filtering controller, which comprises a main board, an acquisition board, a drive board, a power panel and a display panel. The main board is provided with a front digital signal processor (DSP), a rear DSP, an A/D analog-to-digital converter, a low-pass filter and a frequency converter. The front DSP and the rear DSP are connected through a synchronous serial port. An IGBT trigger control signal is generated on the drive board. The IGBT trigger control signal is connected with the front DSP through a three-phase parallel converter. According to the technical scheme of the utility model, the low-voltage active filtering controller can compensate the reactive power of the load while filtering harmonic waves at the same time. Thus, the power factor of the power grid is increased and the power quality of the power grid is improved.
Description
Technical field
The utility model relates to electric energy quality harmonic and administers technical field, exactly relates to a kind of low-voltage active filter controller that is applied in the Power System and its Automation field.
Background technology
Along with the extensive use of power electronic device in every profession and trade, nonlinear-load quantity grows with each passing day, and the normal operation that the harmonic current that these nonlinear-loads produce can endanger its surrounding devices causes system voltage seriously to distort, and produces serious adverse consequences.The harm of harmonic current is mainly manifested in the following aspects in the electrical network:
1) harmonic wave makes the equipment in the electrical network produce additional harmonic loss, reduces the service efficiency of electrical network, transmission of electricity and power consumption equipment, increases grid line loss.
2) thus harmonic wave can produce extra thermal effect to be caused and power consumption equipment heating makes ageing of insulation, reduce the useful life of equipment.In independent minor scale power net, harmonic current also can make transformer, generator etc. produce supplementary load loss and heating, causes mechanical oscillation and noise, greatly strengthens the electric equipment heating loss, accelerates ageing of insulation, affects equipment life; Also can cause overheated damage of rotor top layer parts because of kelvin effect when serious.
3) harmonic wave makes easily between electrical network and the compensation condenser resonance occurs, and makes several times of amplified harmonic currents even decades of times, not only makes capacitor directly impaired, and increases the weight of the threat to other electric equipments.This shows particularly evidently in independent minor scale power net, because its line voltage frequency fluctuation scope is larger, like this with regard to the easier resonance that causes.
4) harmonic wave can cause some protection equipment malfunctions works, such as relaying protection, and fuse etc.Also can cause simultaneously the electrical measuring instrument metering inaccurate.In the class independence electrical network of oil field, the error in dipping that harmonic wave causes to logging might affect the normal operation in whole oil field.
5) harmonic wave can produce near communication system and disturb, and the lighter introduces noise, reduces speech quality, and severe one causes dropout, and communication system can't be worked.
LC tuned filter (title passive filtering) was adopted in the improvement of these harmonic sources in the past, be CN202167852U such as publication number, the Chinese patent literature that open day is on March 14th, 2012 discloses a kind of filter, aim to provide a kind of should the elimination harmonic wave in the national standard, mend power factor more than 0.9 again and the benefit phenomenon do not occur, thereby the idle passive filtering device with adjustable inductance parameters that send do not occur.Described passive filtering device with adjustable inductance parameters device is in supply network equipment, it comprises several AC switch modules, controllable transducer, JKG-PF idle compensating control, several JKG-LB harmonic controllers, described each AC switch module main circuit is connected in the corresponding load circuit with a tunnel of power supply, the quantity of described JKG-LB harmonic controller and described AC switch module is complementary, and described JKG-PF idle compensating control and JKG-LB harmonic controller include the PIC single-chip microcomputer as the core circuit of controller.The utility model can be widely used in the electric power supply system equipment construction field.
But the prior art take technique scheme as representative, every operating index of passive filtering is subject to the restriction of every factors such as electrical network parameter, load variation, environment, does not reach desirable filter effect.
The utility model content
For the existing technical problem of above-mentioned prior art, the utility model proposes a kind of low-voltage active filter controller that is applied in the Power System and its Automation field, the utility model is in the filtering harmonic wave reactive power that can also compensate load simultaneously, reach the raising power factor of electric network, improved the purpose of the electrical network quality of power supply.
The utility model is by adopting following technical proposals to realize:
A kind of low-voltage active filter controller, comprise mainboard, collection plate, drive plate, power panel and display panel, it is characterized in that: be provided with front end DSP, rear end DSP, A/D analog to digital converter on the described mainboard, low pass filter and frequency changer connect by synchronous serial interface between described front end DSP and the rear end DSP; Be provided with voltage, current sensor on the described collection plate, described voltage, current sensor are connected with low pass filter with the A/D analog to digital converter respectively, and low pass filter is connected with described front end DSP through frequency changer, and the A/D analog to digital converter is connected with front end DSP; Producing on the described drive plate has the IGBT Trig control signal, and the IGBT Trig control signal is connected with described front end DSP through the parallel three phase current transformer.
Be connected with SD card memory and FLASH memory at described rear end DSP, and have Ethernet interface, RS485 interface and USB interface at described rear end DSP.
Described mainboard, collection plate, drive plate, power panel and display panel are integrated in the metal chassis.
Compared with prior art, the technique effect that reaches of the utility model is as follows:
1, in the utility model, connects by synchronous serial interface between described front end DSP and the rear end DSP, both can realize seamless link, can realize that again two-way Large Volume Data is mutual; And the IGBT Trig control signal passes through the parallel three phase current transformer to system's injecting compensating electric current, harmonic current equal and opposite in direction in this offset current and the load current, opposite direction, cancel each other, realize leaching the function of harmonic wave, guarantee that the final system power that flows into is sinusoidal wave, thereby the technical scheme that forms compared with prior art, the utility model has reached the raising power factor of electric network in the filtering harmonic wave reactive power that can also compensate load simultaneously, improves the purpose of the electrical network quality of power supply.
2, in the utility model, mainboard, collection plate, drive plate, power panel and display panel are integrated in the metal chassis, compact conformation, and it is little to take up room, good looking appearance, shield effectiveness is good, and antijamming capability is strong.
Description of drawings
The utility model is described in further detail below in conjunction with specification drawings and specific embodiments, wherein:
Fig. 1 is structural representation of the present utility model.
Mark among the figure:
1, front end DSP, 2, rear end DSP, 3, analog input, 4, low pass filter, 5, frequency changer, 6, the A/D analog to digital converter, 7, the IGBT Trig control signal, 8, SD card memory, 9, FLASH memory, 10, liquid crystal display, 11, Ethernet interface, 12, RS485 interface, 13, touch-screen.
Embodiment
With reference to Fig. 1, preferred forms of the present utility model is: this controller is comprised of five parts such as mainboard, collection plate, drive plate, power panel, display panels.
Mainboard is as the core of whole system, adopt two DSP structures, two dsp chips all are the product of ADI company, need not increase interface chip, only just can finish seamless link by the synchronous serial interface (SPORT mouth) that carries, realize easily that afterwards two-way Large Volume Data is mutual.Utilize two AD7934 chips that 12 analog signals are carried out the synchronous high-speed sampling, utilize advanced algorithm to carry out analytical calculation by front end DSP1 afterwards, adopt the triggering of PWM technology control IGBT, simultaneously result is passed to that rear end DSP2 shows, alarm, storage, communication upload.Sampling rate is up to 200kHz, can accurately detect and leach 2 times～50 subharmonic.Program adopts the FLASH chip-stored, and record data adopt the large capacity storage of SD card, can carry out continuous record storage more than 1 year.Have the multiple external interfaces such as Ethernet, RS485, USB, built-in multiple communication protocol can satisfy the demand of different user.
Collection plate utilizes first voltage, current sensor that the forceful electric power signal without the weak electric signal that skew ground accurate transformation gathers for adapting to A/D, is passed through frequency overlapped-resistable filter again as the prime passage of whole system, finishes the conditioning to signal.The analog quantity of collection plate collection comprises 3 phase busbar voltages, threephase load electric current, three-phase offset current, two dc capacitor voltages, system's current in middle wire, altogether 12 road analog acquisitions.
The effect of drive plate is the Trig control signal that produces six IGBT.The parallel three phase current transformer that this signal is comprised of large capacity IGBT pipe by control is to system's injecting compensating electric current, harmonic current equal and opposite in direction in this offset current and the load current, opposite direction is cancelled each other, realization leaches the function of harmonic wave, guarantees that the final system power that flows into is sinusoidal wave.
Power panel provides working power for whole system, comprises+5V ± 12V, ± 24V, GND.This power panel is by the compatible 4 grade standards design of national electric capacity, and antijamming capability is strong.
Display panel adopts large-screen, high-resolution, very color LCD display as the interactive interface of whole system, but the ruuning situation of real-time display system parameter and device.Touch-sensitive display is adopted in man-machine interaction, and is easy to operate, antijamming capability is strong.
Built-in harmonic wave and idle calculation procedure, digital filter program, order component calculation procedure, frequency measurement program, sampling interrupt routine, PWM control program, front and back end DSP2 communication program, the dc bus capacitor overvoltage on front end DSP1 of this controller, IGBT overcurrent, the various defence programs such as overheated.Built-in ethernet on the rear end/USB/RS485 driver, LCD driver, MODBUS communication protocol, CDT communication protocol, 1801 communication protocols, LPC communication protocol, man-machine interaction program etc. have friendly man-machine interface and interactive function.
This controller adopts standard 4U cabinet, and above-mentioned five pcb boards are integrated in the metal chassis, compact conformation, and it is little to take up room, good looking appearance, shield effectiveness is good, and antijamming capability is strong.
Claims (3)
1. low-voltage active filter controller, comprise mainboard, collection plate, drive plate, power panel and display panel, it is characterized in that: be provided with front end DSP(1 on the described mainboard), rear end DSP(2), A/D analog to digital converter (6), low pass filter (4) and frequency changer (5), described front end DSP(1) and rear end DSP(2) between connect by synchronous serial interface; Be provided with voltage, current sensor on the described collection plate, described voltage, current sensor are connected 4 with A/D analog to digital converter (6) with low pass filter respectively) be connected, low pass filter (4) is through frequency changer (5) and described front end DSP(1) be connected A/D analog to digital converter (6) and front end DSP(1) be connected; Producing on the described drive plate has IGBT Trig control signal (7), and IGBT Trig control signal (7) is through parallel three phase current transformer and described front end DSP(1) be connected.
2. a kind of low-voltage active filter controller according to claim 1, it is characterized in that: at described rear end DSP(2) be connected with SD card memory (8) and FLASH memory, and at described rear end DSP(2) have Ethernet interface (11), RS485 interface (12) and a USB interface.
3. a kind of low-voltage active filter controller according to claim 1, it is characterized in that: described mainboard, collection plate, drive plate, power panel and display panel are integrated in the metal chassis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204089684U CN202737465U (en) | 2012-08-17 | 2012-08-17 | Low-voltage active filtering controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204089684U CN202737465U (en) | 2012-08-17 | 2012-08-17 | Low-voltage active filtering controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202737465U true CN202737465U (en) | 2013-02-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012204089684U Expired - Lifetime CN202737465U (en) | 2012-08-17 | 2012-08-17 | Low-voltage active filtering controller |
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| Country | Link |
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| CN (1) | CN202737465U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11955782B1 (en) | 2022-11-01 | 2024-04-09 | Typhon Technology Solutions (U.S.), Llc | System and method for fracturing of underground formations using electric grid power |
-
2012
- 2012-08-17 CN CN2012204089684U patent/CN202737465U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11955782B1 (en) | 2022-11-01 | 2024-04-09 | Typhon Technology Solutions (U.S.), Llc | System and method for fracturing of underground formations using electric grid power |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130213 |
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| CX01 | Expiry of patent term |