CN202564961U - European box-type transformer reactive power compensation device - Google Patents
European box-type transformer reactive power compensation device Download PDFInfo
- Publication number
- CN202564961U CN202564961U CN 201220133169 CN201220133169U CN202564961U CN 202564961 U CN202564961 U CN 202564961U CN 201220133169 CN201220133169 CN 201220133169 CN 201220133169 U CN201220133169 U CN 201220133169U CN 202564961 U CN202564961 U CN 202564961U
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- switch
- controller
- reactive power
- compensation device
- compensating circuit
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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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Abstract
The present utility model discloses an European box-type transformer reactive power compensation device used in the power transmission and distribution field. The device comprises a controller, a mutual inductor, a knife fusing switch and a compensation circuit, the compensation circuit comprises multiple groups of capacitor sets which are connected in parallel, each group of capacitor sets of the compensation circuit are connected with an output end of the knife fusing switch through composite switches and air switches which are successively connected with the capacitor sets in series; each composite switch is formed by connecting a silicon controlled rectifier switch and an AC contactor in parallel, a control signal input end is arranged on each composite switch; an input end of the controller is connected with a power distribution system through a mutual inductor, an output end of the controller is connected with a control signal input end of each composite switch of the compensation circuit; and an input end of the knife fusing switch is connected with the power distribution system. The device is low in energy consumption and stable and reliable in operation.
Description
Technical field
A kind of Europe that the utility model relates to the power transmission and transforming equipment field becomes reactive power compensation device.
Background technology
Raising along with high speed development of national economy and living standards of the people; The town and country power load grows with each passing day; The distribution system maximum load refreshes year by year, and is also more and more stricter to the requirement of the quality of power supply to production and household electricity, and along with the variation of load is often very frequent to the regulatory demand of voltage power-less; If artificially regulate intervention; The burden and the possibility that increase the dispatcher on the one hand are untimely, and it is thorough reasonable on judging, to be difficult to accomplish on the other hand, can not guarantee good power supply quality and the potentiality that make full use of the voltage power-less conditioning equipment.Along with the development of power electronic technology, engendered the transformer reactive power automatic compensation controller.Its use can alleviate operations staff's workload, improves the real time response speed of voltage and idle control.But this type of device exists hardware designs and repeats, increases equipment investment and fragile, shortcoming such as control is dumb.
Adopted this type of device; The power quality problem of user side mainly comprises reactive power problem, i.e. power factor problem of lower, original power distribution station; Be that the case change lacks fastening on the spot; The low-voltage circuit power factor is generally on the low side, and a large amount of reactive powers flow in distribution system, cause waste of energy.Because Europe becomes, the capacity that promptly European box type transformer quantity is more, the infield varies, Europe becomes is also inequality, and work out the low-voltage reactive power power self compensation device that is fit to the Europe transformation and distribution system is to be necessary very much for this reason.
The utility model content
The purpose of the utility model is in order to overcome the deficiency of prior art, to provide a kind of Europe to become reactive power compensation device.Its energy consumption is low, and is stable.
A kind of technical scheme that realizes above-mentioned purpose is: a kind of Europe becomes reactive power compensation device, comprises controller, instrument transformer, switch with knifeshaped fuse and compensating circuit;
Said compensating circuit comprises some groups of capacitor groups parallel with one another, and the every group capacitor group on the said compensating circuit is combination switch and the air switch through connecting successively with said capacitor group all, is connected with the output of said switch with knifeshaped fuse; Said combination switch is made up of reverse-blocking tetrode thyristor parallel with one another and A.C. contactor, on the said combination switch signal input end is set;
The input of said controller connects distribution system through said instrument transformer, and the output of said controller connects the signal input end of each the said combination switch on the said compensating circuit;
The input of said switch with knifeshaped fuse connects distribution system.
Further, the said capacitor component on the said compensating circuit is for mending the capacitor group and divide to mend the capacitor group altogether, and the said branch on the said compensating circuit is mended the capacitor group through the N zero line connection mutually on a lead and the said distribution system.
Further again, said compensating circuit is provided with maximum 12 groups and mends capacitor group and maximum four components benefit capacitor group altogether.
Further, said controller comprises the D/A converting circuit that is arranged at said controller input, is arranged at the dsp chip in the said controller and is arranged at the signal amplification circuit of said controller output end.
Further, the output of said controller also connect the N phase zero line of said distribution system.
Further, the output of said switch with knifeshaped fuse also connects lightning arrester.
Further, also be connected with the control combination switch on the said controller, the structure of said control combination switch be with said compensating circuit on the structure of said combination switch be identical.
Adopted the technical scheme of a kind of Europe change reactive power compensation device of the utility model; Promptly on the compensating circuit of said Europe change reactive power compensation device, combination switch is set; The technical scheme that said combination switch is made up of reverse-blocking tetrode thyristor parallel with one another and A.C. contactor, its technique effect is: said reverse-blocking tetrode thyristor is as noncontacting switch, in establish the zero cross fired module; Can realize zero passage voltage input, the zero current cross excision of said capacitor group; Have switching and do not have impact, non-transient overvoltage, advantage such as switching frequency is high, and long service life and dynamic response are fast.The normal operation of said capacitor group is carried out by A.C. contactor; Reduced said reverse-blocking tetrode thyristor power loss; And eliminated the harmonic wave of the heating and the generation of said reverse-blocking tetrode thyristor, make said reactive power compensation device have the characteristics of low energy consumption and stable and reliable operation.
Description of drawings
Fig. 1 is the electrical block diagram that a kind of Europe of the utility model becomes reactive power compensation device;
Fig. 2 is the compound switch structure sketch map on a kind of European reactive power compensation device of the utility model.
Embodiment
See also Fig. 1 and Fig. 2,, pass through embodiment particularly below, and combine accompanying drawing at length to explain in order to understand the technical scheme of the utility model better:
See also Fig. 1, a kind of Europe in the present embodiment becomes reactive power compensation device, is connected with distribution system, and said distribution system comprises the A phase line, the B phase line, and C phase line and N be zero line mutually, said distribution system connection load.Said reactive power compensation device comprises controller 200, instrument transformer 3, switch with knifeshaped fuse 5 and compensating circuit 100.
The input of said controller 200 connects distribution system through instrument transformer 3; Said instrument transformer 3 is current transformer and voltage transformer; The effect of said instrument transformer 3 is that the current signal of the three-phase circuit on the distribution system and voltage signal are gathered; Because the current signal and the voltage signal of the three-phase circuit on the distribution system are the forceful electric power signals, therefore the another one effect of said instrument transformer 3 is that said forceful electric power conversion of signals is become weak electric signal simultaneously.
The input of said controller 200 is provided with D/A converting circuit, i.e. A/D change-over circuit, and said D/A converter module connects the dsp chip that is built in said controller 200, and said dsp chip is connected in the signal amplification circuit 4 of said controller 200.
The effect of said D/A converting circuit is; Said weak electric signal is become digital signal by analog-signal transitions.Said dsp chip is made response according to said digital signal, sends control signal.
In addition; Also be provided with numeric display unit on the said controller 200; Show the 3-11 order harmonic components of said reactive power compensation device three-phase current, voltage, active power, reactive power, voltage and total harmonic content and access place power factor, play the effect of power quality analyzer.
The output of said controller 200 also connects the N phase zero line on the said distribution system through a lead, does not damage because of short circuit current or overvoltage to protect said controller 200.
In addition, said controller 200 also has RS232, RS485 serial ports, far infrared receiver, and realization is easily communicated by letter with PC or palmtop PC, through the PC collection, check and print control unit 200 record data.
Said compensating circuit 100 is connected the output of said switch with knifeshaped fuse 5, and the input of said switch with knifeshaped fuse 5 connects said distribution system, and said like this compensating circuit 100 just can be connected with distribution system, and distribution system is carried out reactive power compensation.
Be provided with some capacitor groups parallel with one another on the said compensating circuit 100.Said capacitor group can be divided into branch benefit capacitor group and mend the capacitor group altogether.On the said compensating circuit 100, the said capacitor group of mending altogether is 12 groups at most, and said branch is mended the capacitor group and is four groups at most.In the present embodiment, be provided with first on the said compensating circuit 100 respectively and mend capacitor group 101, second altogether and mend capacitor group 102, first fen benefit capacitor group 103, second fen benefit capacitor group 104 altogether.Benefit capacitor group 103 was connected the N phase zero line on the said distribution system with said second minute benefit capacitor group 104 through a line conductor in said first minute.
Said first mends capacitor group 101, said second altogether mends capacitor group 102, said first minute benefit capacitor group 103, said second minute benefit capacitor group 104 altogether and connects a combination switch separately.Each said combination switch all is made up of reverse-blocking tetrode thyristor parallel with one another 23 and A.C. contactor 24, the Fig. 2 that sees also.
All be provided with signal input end on each said combination switch on the said compensating circuit 100 simultaneously, this is the routine configuration on present such combination switch.The output of said controller 200 connects the signal input end of each the said combination switch on the said compensating circuit 100; The dsp chip that said like this compensating circuit 100 just can receive by said controller 200 sends, and through the control signal of said amplifying circuit 5 amplifications.
Said reverse-blocking tetrode thyristor 23 is as noncontacting switch; In establish the zero cross fired module, can realize zero passage voltage input, zero current cross excision to said capacitor group, have switching and do not have impact, non-transient overvoltage; Advantages such as switching frequency is high, and long service life and dynamic response are fast.The normal operation of said capacitor group is carried out by said A.C. contactor 24; Said reverse-blocking tetrode thyristor 23 power losss have been reduced; And eliminated the harmonic wave of the heating and the generation of said reverse-blocking tetrode thyristor 23, make said reactive power compensation device have the characteristics of low energy consumption and stable and reliable operation.
Said first mends capacitor group 101, said second altogether mends said combination switch that capacitor group 102, said first minute benefit capacitor group 103, said second minute benefit capacitor group 104 connect respectively altogether and is respectively first combination switch 211, second combination switch 212, the 3rd combination switch 213 and the 4th combination switch 214.Said first combination switch 211, said second combination switch 212, said the 3rd combination switch 213 and said the 4th combination switch 214 are connected first air switch 221, second air switch 222, the 3rd air switch 223 and the 4th air switch 224 respectively; Said first air switch 221, said second air switch 222, said the 3rd air switch 223 and said the 4th air switch 224 are connected the output of said switch with knifeshaped fuse 5 respectively, and said like this compensating circuit 100 just is connected with the output of said switch with knifeshaped fuse 5.
In the present embodiment, also be provided with radiator on the said reverse-blocking tetrode thyristor in all the said combination switches on the said compensating circuit 100.
In addition, the output of said switch with knifeshaped fuse 5 also is connected with lightning arrester 6.
The control end of said in addition controller 200 also is connected with four control combination switches, and the structure of the said combination switch on the said compensating circuit of the structure of said control combination switch is identical.These four said control combination switches are respectively: the first control combination switch 211; The second control combination switch 212; The 3rd control combination switch 213 is controlled combination switch 214 with the 4th, states first and mends capacitor group 101, said second altogether and mend capacitor group 102, said first minute benefit capacitor group 103, said second minute benefit capacitor group 104 altogether and carry out artificial switching said respectively.
Said reactive power compensation device is contained in the casing; The body structure of said reactive power compensation device has taken into full account the applicability of adverse circumstances such as high temperature, humidity and thunderbolt; And adopt the stainless steel of surperficial coated processing to process, sound construction, performance of ventilation and heat dispersion is good and waterproof.Mounting bracket on the said casing all adopts anti-corrosion measure such as hot galvanizing to handle, and on the said casing all are exposed electronic component carries out insulation measures and handle.Said casing is divided into six locellus: said controller 200 is installed in the controller chamber; Breaker chamber is installed all the said air switches on the said compensating circuit 100; Said switch with knifeshaped fuse 5 is installed in the fuse chamber; The reverse-blocking tetrode thyristor 23 in all the said combination switches on the said compensating circuit 100 is installed in the silicon controlled module chamber; The A.C. contactor 24 in all the said combination switches on the said compensating circuit 100 is installed in the A.C. contactor chamber; Capacitor chamber is installed all the said capacitor groups on the said compensating circuit 100.Casing adopts the unit construction design, can expand by the 20mm modulus.Said controller 200 is formed control and capacitor cell with all the said capacitor groups on the said compensating circuit 100; All said combination switches on said switch with knifeshaped fuse 5 and the said compensating circuit 100 and said air switch and composition inlet wire and switching unit; Can make amendment neatly in these two unit, function is expanded and filling, helps the upgrading product replacement in the future.
For doing of dsp chip following improvement.
Built-in voltage current phase determining program in the said dsp chip can detect the whether anti-phase of phase place of input current and voltage automatically, if anti-phase, program can be adjusted automatically, makes electric current and voltage waveform homophase.The solution of electric current and voltage inversion problem greatly facilitates Unit Installation, maintenance and debugging.
In the said in addition dsp chip program of carrying out Harmonics Calculation is housed also, this program is through fast fourier transformation algorithm, and promptly the algorithm of FFT is realized.
The locking under brownout and too high situation of said capacitor group on the said compensating circuit 100 can not put into operation again.Also for fear of under the load situation very low less than single-stage reactive power compensation capacity, distribution system power factor, distribution system possibly be in the benefit state, caused the distribution system end voltage to be elevated.Present embodiment has adopted reactive voltage combination well shape control mode to come the said capacitor group on the said compensating circuit 100 of switching.Promptly only when the system voltage of distribution system is between under-voltage magnitude of voltage and the overvoltage magnitude of voltage, a kind of Europe of the utility model becomes the throwing limit that reactive power compensation device just can set according to the idle value and the said controller 200 of default and cuts the capacitor group on the said compensating circuit of limit switching.
Said dsp chip; Adopt integral algorithm to come calculating voltage U
electric current I
and active power P
to extrapolate the tangible power S (S=UI) of circuit then according to U, I, P, and then obtain power factor
and reactive power
When distribution system breaks down, when causing said distribution system outage, controller 200 can detect mistake rapidly, sends the initiatively capacitor group group that put into operation of excision of instruction.The excision mode is the zero current excision; Can not form like this and impact the capacitor group on the said compensating circuit 100; Play the said reverse-blocking tetrode thyristor of said capacitor bank on the said compensating circuit 100 of protection; Said Europe becomes the effect of inner other switch of reactive power compensation device, prolongs said Europe simultaneously and becomes reactive power compensation device inner member useful life.In addition; Europe in the present embodiment becomes reactive power compensation device in addition; Can be through being built in the dsp chip in the said controller 200, the timely important electrical parameter before the record trouble, and it is kept in the storage chip of controller 200; And can preserve data 60 days for a long time under the situation of outage, for the distribution system accident analysis is provided convenience.
Therefore, said controller 200 can carry out following operation: the locked loop that prevents the capacitor group miscarrying on the said compensating circuit 100 during the route protection tripping operation; When the capacitor bank protection on the said compensating circuit 100 moves, send the control command of locking; When capacitor group switch fault on the said compensating circuit 100 or maintenance, send the control command of locking; In setting-up time, when the same capacitor group on the said compensating circuit 100 obtains contrary instructions, send the control command of locking; Cause when harmonic wave crosses the border after dropping into the capacitor group, send the excision instruction.
The Europe of the utility model becomes coming into operation of reactive power compensation device can realize the reactive power in-situ compensation, obviously reduces the distribution system power loss, and improves the utilance of related transformer, improves the power factor of distribution system.It is adaptive residual current compensation that Europe in the present embodiment becomes reactive power compensation device, helps improving the degree of unbalance of three-phase voltage, makes the compensation of every phase obtain optimum efficiency.
Simultaneously, Europe in the present embodiment becomes reactive power compensation device, also has defencive function, can be directed against phase shortage, short circuit, overload, overvoltage, under-voltage, the harmonic wave lamp unusual condition that crosses the border said Europe change reactive power compensator is protected.
Overvoltage protection: in dsp chip, set over voltage alarm value and overvoltage locking value, when distribution system voltage was higher than the over voltage alarm value, the over voltage alarm lamp was bright; When distribution system voltage is higher than overvoltage locking value, said controller 200 lockings output signal.
Under-voltage: when setting undervoltage warning value and the worthwhile distribution system voltage of undervoltage lockout were lower than the undervoltage warning value in dsp chip, the undervoltage warning lamp was bright; When distribution system voltage is lower than the undervoltage lockout value, said controller 200 lockings output signal.
Harmonic protection: in dsp chip, set the harmonic wave alarming value harmonic locking value of crossing the border of crossing the border, when the distribution system harmonic wave was higher than harmonic wave and crosses the border alarming value, the harmonic wave alarm lamp was bright; When the distribution system harmonic wave is higher than harmonic wave and crosses the border the locking value, said controller 200 lockings output signal.
Those of ordinary skill in the art will be appreciated that; Above embodiment is used for explaining the utility model; And be not the qualification that is used as the utility model; As long as in the connotation scope of the utility model, all will drop in claims scope of the utility model variation, the modification of the above embodiment.
Claims (7)
1. an Europe becomes reactive power compensation device, comprises controller (200), instrument transformer (3), switch with knifeshaped fuse (5) and compensating circuit (100); It is characterized in that:
Said compensating circuit (100) comprises some groups of capacitor groups parallel with one another, and the every group capacitor group on the said compensating circuit (100) is combination switch and the air switch through connecting successively with said capacitor group all, is connected with the output of said switch with knifeshaped fuse (5); Said combination switch is made up of reverse-blocking tetrode thyristor parallel with one another (23) and A.C. contactor (24), on the said combination switch signal input end is set;
The input of said controller (200) connects distribution system through said instrument transformer (3), and the output of said controller (200) connects the signal input end of each the said combination switch on the said compensating circuit (100);
The input of said switch with knifeshaped fuse (5) connects distribution system.
2. a kind of Europe according to claim 1 becomes reactive power compensation device; It is characterized in that: the said capacitor component on the said compensating circuit (100) is for mending the capacitor group and divide to mend the capacitor group altogether, and the said branch on the said compensating circuit (100) is mended the capacitor group through the N zero line connection mutually on a lead and the said distribution system.
3. a kind of Europe according to claim 2 becomes reactive power compensation device, it is characterized in that: said compensating circuit (100) is provided with maximum 12 groups and mends capacitor group and maximum four components benefit capacitor group altogether.
4. become reactive power compensation device according to any described a kind of Europe in the claim 1 to 3, it is characterized in that: said controller (200) comprises the D/A converting circuit that is arranged at said controller (200) input, is arranged at dsp chip and the signal amplification circuit (4) that is arranged at said controller (200) output in the said controller (200).
5. become reactive power compensation device according to any described a kind of Europe in the claim 1 to 3, it is characterized in that: the output of said controller (200) also connects the N phase zero line of said distribution system.
6. become reactive power compensation device according to claim 1 or 2 or 3 described a kind of Europe, it is characterized in that: the output of said switch with knifeshaped fuse (5) also connects lightning arrester (6).
7. become reactive power compensation device according to claim 1 or 2 or 3 described a kind of Europe, it is characterized in that; Said controller also is connected with the control combination switch on (200), the structure of said control combination switch be with said compensating circuit on the structure of said combination switch be identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220133169 CN202564961U (en) | 2012-03-31 | 2012-03-31 | European box-type transformer reactive power compensation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220133169 CN202564961U (en) | 2012-03-31 | 2012-03-31 | European box-type transformer reactive power compensation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202564961U true CN202564961U (en) | 2012-11-28 |
Family
ID=47214576
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220133169 Expired - Lifetime CN202564961U (en) | 2012-03-31 | 2012-03-31 | European box-type transformer reactive power compensation device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202564961U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102624008A (en) * | 2012-03-31 | 2012-08-01 | 上海市电力公司 | European-type transformer reactive power compensation device |
| CN104092189A (en) * | 2014-08-05 | 2014-10-08 | 国家电网公司 | Reactive power compensation protective device in power transmission and transformation system |
-
2012
- 2012-03-31 CN CN 201220133169 patent/CN202564961U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102624008A (en) * | 2012-03-31 | 2012-08-01 | 上海市电力公司 | European-type transformer reactive power compensation device |
| CN104092189A (en) * | 2014-08-05 | 2014-10-08 | 国家电网公司 | Reactive power compensation protective device in power transmission and transformation system |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121128 |