CN201174598Y - Transient anti-harmonic type reactive power auto-compensation apparatus - Google Patents
Transient anti-harmonic type reactive power auto-compensation apparatus Download PDFInfo
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- CN201174598Y CN201174598Y CNU2008200716632U CN200820071663U CN201174598Y CN 201174598 Y CN201174598 Y CN 201174598Y CN U2008200716632 U CNU2008200716632 U CN U2008200716632U CN 200820071663 U CN200820071663 U CN 200820071663U CN 201174598 Y CN201174598 Y CN 201174598Y
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- compensation
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- reactive power
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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
Abstract
The utility model discloses an instantaneous harmonic wave resistance type reactive power automatic compensation device, which belongs to the low-voltage reactive power automatic compensation device field. The device mainly comprises a microcomputer controller, an air switch, a rapid fuse, a two-phase full control valve switching circuit, a three-phase series compensation reactor, a capacitor, an ammeter and a power factor meter. A main compensation circuit is connected with the capacitor through the air switch, the rapid fuse, the two-phase full control valve switching circuit and the three-phase series compensation reactor, and the reactive power compensation and the harmonic elimination are synchronously performed. Current transformers connected before and behind a compensation point are connected with the ammeter and the power factor meter before and behind the compensation, which ensures that the compensation effect before and after the compensation is more intuitive. The device is safe and reliable, saves one third controlled silicon than the prior art, has low production cost, quick switching speed (20ms) and more intuitive compensation effect, improves the power factor to be between 0.95 and 0.99, effective suppresses series and parallel resonances of harmonic waves, greatly improves the service life and the safety of the device, and reduces the line loss rate to be between 10 and 50 percent.
Description
Technical field
The utility model belongs to low-voltage reactive power power autocompensation installation field, particularly a kind of instantaneous anti-humorous wave mode reactive power automatic compensator.
Background technology
Extensive use along with fast development of national economy and power electronic technology, the various nonlinear-loads of a large amount of uses of many industrial enterprise, such as various rectifier power sources, arc furnace, intermediate frequency furnace, variable frequency power supply etc., various nonlinear-loads insert electrical network, cause higher Harmonics in Electric Power Network content constantly to rise, make harmonic pollution be on the rise.Harmonic pollution brings very big influence to safe, stable, the economical operation of electric power system, jeopardizes Electrical Safety, and power consumption equipment is on every side constituted potential threat, causes the wretched insufficiency of reactive power simultaneously again, reduces the quality of power supply.Wretched insufficiency for compensates electric system reactive power, improve the system voltage level, low-voltage reactive power power autocompensation installation is used in a large number, but the low-voltage reactive power power autocompensation installation that uses contains in network system under the situation of harmonic wave at present, influence each other between low-voltage reactive power power autocompensation installation and the harmonic wave series and parallel resonance takes place, make harmonic current amplify several times even tens times, cause capacitor to burn and other power consumption equipment damage, the existing low-voltage reactive power power autocompensation installation that uses exists following defective and deficiency:
1, when containing harmonic wave in the network system, harmonic current is superimposed upon on the fundamental current of capacitor, and the condenser current effective value is increased, and temperature rise is increased, and causes that capacitor is overheated and reduces the useful life of capacitor or capacitor is burnt.
2, when containing harmonic wave in the network system, harmonic voltage is superimposed upon on the fundamental voltage of capacitor, and the condenser voltage effective value is increased, and voltage peak increases greatly, capacitor is in operation partial discharge takes place and can not extinguishes, and causes capacitor to damage.
3, when containing harmonic wave in the network system, under certain parameter cooperates, the induction reactance of other harmonic sources satisfies when equating condition parallel resonance can take place in the capacitive reactance of Shunt Capacitor Unit and the electrical network, harmonic current is played serious amplification, make harmonic current amplify several times even tens times, make power consumption equipments such as capacitor, cable overheated, quicken ageing of insulation, reduction of service life so that damage and burn.
4, when the electrical network bus contains harmonic voltage, under certain parameter cooperates, series resonance can take place in the capacitor group that leakage reactance and Circuit Fault on Secondary Transformer connect that is connected on the transformer under the bus, jeopardize the Electrical Safety of capacitor itself and near electric equipment, harm is aggravation further, usually causes the serious accident that burns power consumption equipment.
5, the existing low-voltage reactive power power autocompensation installation that uses, device itself can only show compensation arrangement put into operation the back power factor of electrical network and the operating current of compensation arrangement, can not show simultaneously compensation arrangement put into operation preceding, put into operation the back electrical network total current value and power factor value, it is not directly perceived to compensate forward and backward effect.
The utility model content
The purpose of this utility model is effectively to suppress the series and parallel resonance of harmonic wave at existing low-voltage reactive power power autocompensation installation, can not in network system, contain safe and reliable work under the situation of harmonic wave, compensate technical problems such as forward and backward effect is not directly perceived, a kind of series and parallel resonance that can effectively suppress harmonic wave is provided, safe and reliable work under the situation of harmonic wave be can in network system, contain, compensation, the instantaneous more intuitively anti-humorous wave mode reactive power automatic compensator of the forward and backward effect of compensation followed the tracks of fast.
The utility model is design like this:
A kind of instantaneous humorous wave mode reactive power automatic compensator that resists is characterized in that: this device comprises microcomputer controller 16, air switch 4, fast acting fuse 5, two-phase full-control valve switching circuit 6,7, three-phase series compensation reactor 8, capacitor 9, compensation after-current table 2, compensates back power factor meter 3, the preceding ammeter 18 of compensation, the preceding power factor meter 19 of compensation; Main compensation circuit is connected with capacitor 9 by air switch 4, fast acting fuse 5, two-phase full-control valve switching circuit 6,7, three-phase series compensation reactor 8; Main compensation circuit adopts the control of three-phase two-phase, and two-phase wherein is to be connected in the power circuit by two-phase full-control valve switching circuit 6,7, and another is directly to be connected in the power circuit mutually; Compensation after-current instrument transformer 1 is connected with compensation after-current table 2, compensation back power factor meter 3, ammeter 18 before current transformer 17 and the compensation before the compensation, compensates preceding merit and counts factor table 19 and be connected; Temperature detect switch (TDS) is connected with the trigger of two-phase full-control valve switching circuit 6,7, is connected on the three-phase series compensation reactor 8.
The utility model is compared with existing technology has following advantage:
1, main compensation circuit adopts the control of three-phase two-phase, controllable silicon quantity economizes 1/3 than existing technology, under the situation of same capability, identical cabinet size, effectively solved the heat-dissipating space deficiency of the interior electric component of reactive power compensator cabinet in the existing technology, if will guarantee that heat-dissipating space then need increase the technical problem of cabinet size, the layout that makes equipment more science, attractive in appearance, heat-dissipating space is bigger.
2, effectively suppress of the damage of the series and parallel resonance of harmonic wave, ensure the safe and reliable work of the key position capacitor of reactive power compensator, improve the useful life of capacitor capacitor and other power consumption equipment.
3, adjust the configuration parameter of three-phase series compensation reactor, reactance Rate is adjusted into 7%, 12～13% from 4.5～6% and is adjusted into 14%, makes the inhibition harmonic wave ability of reactive power compensator more stable, and it is more safe and reliable to work.
4, be connected with compensation after-current table, power factor meter by compensation after-current instrument transformer, current transformer is counted the factor epiphase and is connected with the preceding ammeter of compensation, merit before the compensation, before reactive power compensator is thrown, throw total current value and the power factor value of back electrical network and show intuitively, make the forward and backward effect of compensation more directly perceived.
5, defencive function is complete, simple to operate, and device adopts air switch and the fast acting fuse duplicate protection at every group capacitor, makes every group capacitor obtain adequately protecting.
6, action response time fast, from motion tracking, real-Time Compensation, switching cycle, digital show, need not on duty, reliable, improve power factor to 0.95～0.99, improve power supply quality, improve the electric energy utilance, fully excavate transformer capacity, increase transformer load capacity, reduce confession, using electricity system network loss, exempt from or reduce power rate fine, reduction business electrical expense.
Description of drawings
Fig. 1 is the utility model circuit theory schematic diagram.
Among the figure: 1, compensation after-current instrument transformer; 2, compensation after-current table; 3, compensation back power factor meter; 4, air switch; 5, fast acting fuse; 6,7 are two-phase full-control valve switching circuit; 8, three-phase series compensation reactor; 9, capacitor; 10, automatic switch; 11, change over switch; 12, voltmeter; 13, starting button; 14, stop button; 15, relay; 16, microcomputer controller; 17, current transformer before the compensation; 18, ammeter before the compensation; 19, power factor meter before the compensation; 20, lightning arrester.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing and example:
As shown in Figure 1, main compensation circuit of the present utility model is made up of with capacitor 9 air switch 4, fast acting fuse 5, two-phase full-control valve switching circuit 6,7, three-phase series compensation reactor 8, and performance element is made of 9 identical compensating units.Main compensation circuit adopts the control of three-phase two-phase, and two-phase wherein is to be connected in the power circuit by two-phase full-control valve switching circuit 6,7, and another is directly to be connected in the power circuit mutually.This device constitutes the harmonic wave absorption circuit by three-phase series compensation reactor 8 and capacitor 9, the series and parallel resonance that effectively suppresses harmonic wave, can in network system, contain safe and reliable work under the situation of harmonic wave, and by adjusting the configuration parameter of three-phase series compensation reactor 8, reactance Rate is adjusted into 7% from 4.5～6%, 12～13% are adjusted into 14%, make the inhibition harmonic wave ability of compensation arrangement more stable, and it is more safe and reliable to work.Temperature detect switch (TDS) is connected with the trigger of two-phase full-control valve switching circuit 6,7, is connected on the three-phase series compensation reactor 8, prevents from that harmonic current is excessive to cause that three-phase series compensation reactor 8 is overheated.
Compensation after-current instrument transformer 1 is installed in the front end of compensation arrangement and power connection points, is connected with compensation back power factor meter 3 with compensation after-current table 2, and the demonstration compensation arrangement is thrown total current value and the power factor value of back power circuit; Current transformer 17 is installed in the rear end of compensation arrangement and power connection points before the compensation, be connected with power factor meter 19 before the compensation with ammeter 18 before the compensation, show preceding total current value and the power factor value of power circuit of compensation arrangement throwing, two ammeters 2 and 18, two power factor meters 3 and 19 are installed on the panel board of compensation arrangement, make the forward and backward compensation effect of compensation more directly perceived.
The current sampling signal of microcomputer controller 16 is connected with compensation after-current instrument transformer 1, voltage sampling signal is connected with automatic switch 10, change over switch 11, starting button 13, stop button 14 and the auxiliary contact of relay 15, and three phase mains is connected to voltmeter 12 and is connected to lightning arrester 20 by change over switch 11.
This device adopts automatic control technology, from the variation of motion tracking detection of grid reactive power, and according to each group capacitor of big or small automatic switching of reactive power, compensation back power factor to 0.95～0.99.
During instantaneous anti-humorous wave mode reactive power automatic compensator work, the air switch 4 of the isolating switch SQ that closes, the main compensation circuit of closing, the automatic switch 10 that closes, press starting button 13, relay 15 electric, microcomputer controller 16.Controller gets current signal and the voltage signal that electric back is gathered network system automatically, and sends the switching instruction through computing, amplification, after relatively.Control strategy adopts multi-parameter integrated control, promptly based on power factor controlling, avoid throw in-of oscillation with Reactive Power Control, with line voltage higher limit and load current lower limit constraints as control capacitor group switching, realize the intelligent comprehensive control of capacitor group, operating passing zero, dynamic response time 20ms, the one-time-reach-place of compensation switching.Control mode adopts the switching cycle working method, realization capacitor group is thrown earlier and is cut earlier, the working method that cut after throwing the back, the switching cycle mode makes each group capacitor group and fling-cut switch utilization rate equalization, reduce the average operating temperature of capacitor group, the balanced work number of times of each electric component improves complete machine useful life and operational reliability.Operating principle be with " idle requirement is also taken into account harmonic wave " two amounts as operating criterion, when mains by harmonics content is low, be main purpose promptly to improve power factor; When mains by harmonics content was higher, harmonic wave control and reactive power compensation were carried out simultaneously.Defencive function is complete, multi-functional integrated intelligent monitoring and protection: establish overvoltage, under-voltage, overheated, overload, phase shortage, short circuit, fast molten, temperature control, air quantity and kinds of protect such as lightning-arrest, externally fault or deactivate automatically when having a power failure.This device can effectively improve electrical network electric power factor, improve quality of voltage, effectively suppress the series and parallel resonance of harmonic wave, be used for electric power system Circuit Fault on Secondary Transformer low-voltage compensation, can be widely used in industries such as metallurgy, chemical industry, machine-building, shipbuilding, oil field, cement, have good harmonic wave control and reactive power compensation effect.
Claims (1)
1, a kind of instantaneous humorous wave mode reactive power automatic compensator that resists is characterized in that: this device comprises microcomputer controller (16), air switch (4), fast acting fuse (5), two-phase full-control valve switching circuit (6,7), three-phase series compensation reactor (8), capacitor (9), compensation after-current table (2), compensates back power factor meter (3), the preceding ammeter (18) of compensation, the preceding power factor meter (19) of compensation; Main compensation circuit is connected with capacitor (9) by air switch (4), fast acting fuse (5), two-phase full-control valve switching circuit (6,7), three-phase series compensation reactor (8); Main compensation circuit adopts the control of three-phase two-phase, and two-phase wherein is to be connected in the power circuit by two-phase full-control valve switching circuit (6,7), and another is directly to be connected in the power circuit mutually; Compensation after-current instrument transformer (1) is connected with compensation after-current table (2), compensation back power factor meter (3), ammeter (18) before current transformer (17) and the compensation before the compensation, compensates preceding merit and counts factor table (19) and be connected; Temperature detect switch (TDS) is connected with the trigger of two-phase full-control valve switching circuit (6,7), is connected on the three-phase series compensation reactor (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200716632U CN201174598Y (en) | 2008-04-10 | 2008-04-10 | Transient anti-harmonic type reactive power auto-compensation apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200716632U CN201174598Y (en) | 2008-04-10 | 2008-04-10 | Transient anti-harmonic type reactive power auto-compensation apparatus |
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| CN201174598Y true CN201174598Y (en) | 2008-12-31 |
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| CNU2008200716632U Expired - Fee Related CN201174598Y (en) | 2008-04-10 | 2008-04-10 | Transient anti-harmonic type reactive power auto-compensation apparatus |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101958553A (en) * | 2010-10-18 | 2011-01-26 | 上海电机学院 | No-load power factor automatic correction system of transformer |
| WO2011020302A1 (en) * | 2009-08-20 | 2011-02-24 | 中国电力科学研究院 | Device for inhibiting harmonic amplification on the third winding side of extra-high voltage /ultra-high voltage transformer |
| CN102891491A (en) * | 2012-09-06 | 2013-01-23 | 山西省电力公司大同供电分公司 | Reactive compensation device of power system |
-
2008
- 2008-04-10 CN CNU2008200716632U patent/CN201174598Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011020302A1 (en) * | 2009-08-20 | 2011-02-24 | 中国电力科学研究院 | Device for inhibiting harmonic amplification on the third winding side of extra-high voltage /ultra-high voltage transformer |
| CN101958553A (en) * | 2010-10-18 | 2011-01-26 | 上海电机学院 | No-load power factor automatic correction system of transformer |
| CN102891491A (en) * | 2012-09-06 | 2013-01-23 | 山西省电力公司大同供电分公司 | Reactive compensation device of power system |
| CN102891491B (en) * | 2012-09-06 | 2016-02-03 | 山西省电力公司大同供电分公司 | A kind of reactive compensation device of power system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081231 Termination date: 20160410 |