CN204928167U - Take high -pressure harmonic current compensation arrangement of idle regulation - Google Patents
Take high -pressure harmonic current compensation arrangement of idle regulation Download PDFInfo
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- CN204928167U CN204928167U CN201520535915.2U CN201520535915U CN204928167U CN 204928167 U CN204928167 U CN 204928167U CN 201520535915 U CN201520535915 U CN 201520535915U CN 204928167 U CN204928167 U CN 204928167U
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- pressure harmonic
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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
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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
- Y02E40/40—Arrangements for reducing harmonics
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Abstract
The utility model relates to a take high -pressure harmonic current compensation arrangement of idle regulation, include: the main circuit is connected with the electric wire netting, pours into the offset current who is used for compensating load current into to the electric wire netting, drive circuit with main circuit connection, drives the switching element in the main circuit, current detection circuit, NOT AND linear load connects, detects real -time load current, still include: the compensation signal generator for generate compensation signal according to user instructions, electric current tracking control circuit, junction current detection circuitry, drive circuit and compensation signal generator carry out the electric current according to compensation signal and trail respectively, generate corresponding control signal and send for drive circuit. Compared with the prior art, the utility model has the advantages of simple effective, improvement system side electric energy quality.
Description
Technical field
The utility model relates to a kind of active electric filter device, especially relates to a kind of high pressure harmonic current compensation device with Reactive-power control.
Background technology
Along with the fast development of power electronic technology, the application that various power electronic equipment is increasingly extensive in generating, transmission of electricity, distribution and using electricity system, the harmonic pollution that nonlinear-load causes is also serious gradually.Simultaneously along with the progress of social informatization, the extensive use of sensitiveness load (as computer control system, sophisticated electronics etc.), it is also proposed higher requirement to the quality of power supply.Further, the harmonic wave that produces of high-tension transformer and low-pressure side are permeated the harmonic wave of coming and all may be produced serious influence to the on high-tension side quality of power supply.
Active power filtering technology, its basic functional principle is: the voltage and current detecting target compensation in real time, offset current is calculated through signal processor sampled operational, draw offset current, what will compensate in offset current and load current humorously involves reactive current, and equal and opposite in direction, phase place be contrary, cancel out each other, and finally obtains the power network current expected, make power network current become the sine wave with voltage in phase, thus reach the object of harmonic inhabitation.But existing active electric filter device can not realize the reactive power compensation of load.
Utility model content
The purpose of this utility model is exactly provide a kind of high pressure harmonic current compensation device of simple and effective band Reactive-power control to overcome defect that above-mentioned prior art exists.
The purpose of this utility model can be achieved through the following technical solutions:
With a high pressure harmonic current compensation device for Reactive-power control, comprising:
Main circuit, is connected with electrical network, injects the offset current being used for compensating load electric current to electrical network;
Drive circuit, is connected with main circuit, drives the switching device in main circuit;
Current detection circuit, is connected with nonlinear load, detects real-time load current;
Also comprise:
Compensating signal generator, for generating compensating signal according to user instruction;
Current follow-up control circuit, connects current detection circuit, drive circuit and compensating signal generator respectively, carries out current tracking according to compensating signal, generates corresponding control signal and sends to drive circuit.
Described compensating signal generator comprises touch-screen.
Described current follow-up control circuit comprises microprocessor.
Described microprocessor is dsp chip.
Described main circuit is the H bridge cascaded high-voltage active electric power compensating circuit be in series by multiple basic H-bridge unit.
Described current detection circuit comprises current transformer.
Compared with prior art, the utility model has the following advantages:
(1) the utility model can realize harmonic current compensation and load reactive power compensation according to demand, thus improves the system side quality of power supply further;
(2) the utility model implementation is simply effective, only needs to increase in the command signal of offset current can realize reactive power compensation with the composition of the fundamental reactive component reversed polarity of momentary load electric current.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in detail.The present embodiment is implemented premised on technical solutions of the utility model, give detailed execution mode and concrete operating process, but protection range of the present utility model is not limited to following embodiment.
As shown in Figure 1, the present embodiment provides a kind of high pressure harmonic current compensation device with Reactive-power control, comprising: main circuit 1, is connected with electrical network, injects the offset current being used for compensating load electric current to electrical network; Drive circuit 2, is connected with main circuit 1, generates PWM ripple signal, drives the switching device in main circuit 1, produce corresponding offset current, inject electrical network; Current detection circuit 3, is connected with nonlinear load, detects real-time load current; Compensating signal generator 4, for generating compensating signal according to user instruction; Current follow-up control circuit 5, connects current detection circuit 3, drive circuit 2 and compensating signal generator 4 respectively, carries out current tracking, generate corresponding control signal and send to drive circuit 2 according to compensating signal.
Main circuit 1 is the H bridge cascaded high-voltage active electric power compensating circuit be in series by multiple basic H-bridge unit, series unit number number determine the highest grid-connected voltage of device and output level number, therefore cascade system is easy to realize mesohigh and Large Copacity exports.This compensating circuit controls cut-offfing of four device for power switching by PWM technology, thus makes single-phase H-bridge unit export the voltage expected, the voltage superposition that each H-bridge unit exports is got up, and is exactly the phase voltage of this compensating circuit.
Current detection circuit 3 comprises current transformer, adopts momentary load electric current.
Compensating signal generator 4 comprises touch-screen, and its compensating signal generated according to user instruction comprises the idle combined compensation signal of harmonic compensation signal, reactive power compensation signal and harmonic wave.
Current follow-up control circuit 5 comprises microprocessor, and this microprocessor adopts dsp chip, comprising:
Harmonic current computing module, extracts harmonic current for the load current obtained according to current detection circuit 3;
Idle component computing module, extracts idle component for the load current obtained according to current detection circuit 3;
Compensating signal receiver module, for receiving the compensating signal that compensating signal generator 4 generates;
Control signal generation module, generates corresponding control signal send to drive circuit 2 for calling harmonic current and/or idle component according to compensating signal.
As in Fig. 1, i
lfor momentary load electric current, i
sfor transient power supply current, i
cfor compensation arrangement (Active Power Filter-APF) injects the offset current of electrical network.According to Kirchhoff's current law (KCL), have: i
s=i
l+ i
c.Owing to containing fundametal compoment and harmonic component in momentary load electric current, momentary load electric current is several to be expressed as: i
l=i
lf+ i
lh, wherein i
lffor the fundametal compoment i of momentary load electric current
lhfor momentary load current harmonics component.If again by momentary load current i
lffundametal compoment resolve into instantaneous active component i
lpfwith instantaneous reactive component i
lqf, then momentary load electric current can be expressed as: i
l=i
lpf+ i
lqf+ i
lh.
If during the harmonic current needing compensating load to produce, the instruction current computing circuit of Active Power Filter-APF detects and calculates the harmonic component of momentary load electric current, using the command signal as offset current after its reversed polarity, the offset current produced by offset current circuit for generating, this offset current and the harmonic component equal and opposite in direction in momentary load electric current, direction are contrary, cancel each other with the harmonic component in momentary load electric current, make only not contain harmonic wave containing the fundametal compoment of load current in source current.So just reach the object eliminating harmonic wave in source current.
If require active power filter while compensation harmonic electric current, go back the reactive power of compensating load, as long as then increase the composition with the fundamental reactive component reversed polarity of momentary load electric current in the command signal of offset current.Like this, the humorous idle component that involves in offset current and load current offsets, and source current equals the fundamental active component of load current.
If load harmonic is not bery serious, then only can need compensating power.
Claims (6)
1. the high pressure harmonic current compensation device with Reactive-power control, comprising:
Main circuit (1), is connected with electrical network, injects the offset current being used for compensating load electric current to electrical network;
Drive circuit (2), is connected with main circuit (1), drives the switching device in main circuit (1);
Current detection circuit (3), is connected with nonlinear load, detects real-time load current;
It is characterized in that, also comprise:
Compensating signal generator (4), for generating compensating signal according to user instruction;
Current follow-up control circuit (5), connect current detection circuit (3), drive circuit (2) and compensating signal generator (4) respectively, carry out current tracking according to compensating signal, generate corresponding control signal and send to drive circuit (2).
2. the high pressure harmonic current compensation device of band Reactive-power control according to claim 1, is characterized in that, described compensating signal generator (4) comprises touch-screen.
3. the high pressure harmonic current compensation device of band Reactive-power control according to claim 1, is characterized in that, described current follow-up control circuit (5) comprises microprocessor.
4. the high pressure harmonic current compensation device of band Reactive-power control according to claim 3, is characterized in that, described microprocessor is dsp chip.
5. the high pressure harmonic current compensation device of band Reactive-power control according to claim 1, is characterized in that, described main circuit (1) is the H bridge cascaded high-voltage active electric power compensating circuit be in series by multiple basic H-bridge unit.
6. the high pressure harmonic current compensation device of band Reactive-power control according to claim 1, is characterized in that, described current detection circuit (3) comprises current transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520535915.2U CN204928167U (en) | 2015-07-22 | 2015-07-22 | Take high -pressure harmonic current compensation arrangement of idle regulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520535915.2U CN204928167U (en) | 2015-07-22 | 2015-07-22 | Take high -pressure harmonic current compensation arrangement of idle regulation |
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| Publication Number | Publication Date |
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| CN204928167U true CN204928167U (en) | 2015-12-30 |
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| CN201520535915.2U Active CN204928167U (en) | 2015-07-22 | 2015-07-22 | Take high -pressure harmonic current compensation arrangement of idle regulation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106374504A (en) * | 2015-07-22 | 2017-02-01 | 利思电气（上海）有限公司 | High-voltage harmonic current compensation apparatus with reactive adjustment |
-
2015
- 2015-07-22 CN CN201520535915.2U patent/CN204928167U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106374504A (en) * | 2015-07-22 | 2017-02-01 | 利思电气（上海）有限公司 | High-voltage harmonic current compensation apparatus with reactive adjustment |
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