CN101316068A - Device for reducing harmonic wave discharged by UPS to electric network - Google Patents
Device for reducing harmonic wave discharged by UPS to electric network Download PDFInfo
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- CN101316068A CN101316068A CNA2008100280223A CN200810028022A CN101316068A CN 101316068 A CN101316068 A CN 101316068A CN A2008100280223 A CNA2008100280223 A CN A2008100280223A CN 200810028022 A CN200810028022 A CN 200810028022A CN 101316068 A CN101316068 A CN 101316068A
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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
- Y02E40/10—Flexible AC transmission systems [FACTS]
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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 invention discloses a device which reduces the harmonic leakage of UPS towards an electricity grid, comprising a three-phase two-winding phase-shifting transformer, a 11th harmonic filter and two groups of three-phase rectifier bridge; the three-phase two-winding phase-shifting transformer is provided with a star-shaped three-phase output winding and a triangle three-phase output winding; the 11th harmonic filter is connected with the primary edge input end of the electricity grid of the three-phase two-winding phase-shifting transformer; the star-shaped three-phase output winding of the three-phase two-winding phase-shifting transformer is connected with the input end of a group of three-phase rectifier bridges; the triangle three-phase output winding of the three-phase two-winding phase-shifting transformer is connected with the input end of the other group of three-phase rectifier bridges. The star-shaped three-phase output winding outputs the three-phase power supply of 0 DEG phase by self-coupling and the triangle three-phase output winding outputs the three-phase power supply with the phase-shifting of +30 DEG; furthermore, the two groups of three-phase power supplies are respectively connected with the input end of the two groups of the three-phase rectifier bridges, thus obtaining the 12-phase rectifier circuit. The device of the invention combines the 12-phsae rectifier circuit and the 11th harmonic filter and can completely eliminate the damage of the harmonic current content to the electricity grid basically.
Description
Technical field
The present invention relates to UPS (uninterrupted power supply) field, particularly a kind of UPS that reduces is toward the harmonic wave discharged device of electrical network.
Background technology
Fast development along with electronic technology; UPS the application of telecommunications, finance, industry from simple data backup buffered sources towards to the hardware device the whole network, the network uninterrupted power supply development of general protection is carried out in the route of transmission of working procedure and data.At present because the developing rapidly of financial telecommunications Industry Control, the demand of UPS develops to height maximization, centralization, intelligentized direction.Before 2000, the online UPS that uses is that distributing uses basically, and capacity is below 80KVA, and along with the development and the maturation of UPS technology, market is to more than the 100KVA even 400KVA and come into operation in many places to the ups system of 800KVA.From the national authority statistics, the UPS of Chinese market just enlarges with the scale in every year 8 ~ 10% in 3,000,000,000 yuan market, and its utilization scope is wide, the world is influenced big unprecedented.
Because UPS's extensively comes into operation, the rectifier system of UPS and its harmonic wave are released becomes the problem that people pay close attention to, and also becomes the technical task of UPS development.
Calendar year 2001 the Ministry of Information industry, communication is used that uninterrupted power supply---UPS national communication industry standard YD/T1095-2000 comes into effect.Its specification requirement is divided into I, II, 3-39 THDA of III class ∑ and is respectively this standard to UPS input current harmonics composition＜and 5%,＜15%,＜25%, usually owing to technology and cost reason generally are to adopt 6 impulse commutations, the harmonic wave that 6 impulse commutations are contained, only just reach 32% 5 times, the requirement of III class in seriously being above standard, the current harmonics that how to reduce the UPS input is released and is just become the problem that a UPS producer and UPS magnetic device supplier thereof pay close attention to.
Summary of the invention
The purpose of this invention is to provide a kind of UPS of reduction toward the harmonic wave discharged device of electrical network, reduce that electrical network is polluted.
Technical scheme of the present invention is such: reduce UPS toward the harmonic wave discharged device of electrical network, comprise three-phase two winding phase shifting transformers, 11 subharmonic filters and two groups of three-phase commutation bridges, above-mentioned three-phase two winding phase shifting transformers have star three-phase output winding and triangle three-phase output winding, above-mentioned 11 subharmonic filters are connected in the former limit of the electrical network input of above-mentioned three-phase two winding phase shifting transformers, the star three-phase output winding of above-mentioned three-phase two winding phase shifting transformers is connected in the input of above-mentioned one group of three-phase commutation bridge, and the triangle three-phase output winding of above-mentioned three-phase two winding phase shifting transformers is connected in the input of above-mentioned another group three-phase commutation bridge.
The former limit of the electrical network input of above-mentioned three-phase two winding phase shifting transformers is serially connected with inductance.
The star three-phase output winding of above-mentioned three-phase two winding phase shifting transformers is serially connected with another inductance.
Above-mentioned three-phase two winding phase shifting transformers are the self coupling isolating transformer.
Above-mentioned 11 subharmonic filters are series connection m formula filter.
Be connected with interphase reactor between above-mentioned two groups of three-phase commutation bridges.
After adopting such scheme, reduction UPS of the present invention is toward the harmonic wave discharged device of electrical network, the three phase mains of 0 ° of phase place of star three-phase output winding self coupling output of three-phase two winding phase shifting transformers, the three phase mains of+30 ° of phase shifts of triangle three-phase output winding output, and these two groups of three phase mains are connected to the input of two groups of three-phase commutation bridges respectively, three-phase commutation bridge is equivalent to six-phhase circuit, and therefore the three-phase commutation bridge by 30 ° of two groups of phase differences just obtains 12 commutating phase circuit.Owing to adopted 12 commutating phase circuit, 5,7,17,19 ... subharmonic is cancelled out each other, and the intensity maximum is 11 subharmonic in the remaining 12K+1 subharmonic, and therefore, the present invention is provided with 11 subharmonic filters at the former limit input of three-phase two winding phase shifting transformers.The number of phases the more, the minimum subfrequency in the commutating voltage is higher, its amplitude is littler, more near direct voltage, filtering is also easier, and the present invention is in conjunction with 12 phase controlled rectification circuits and 11 subharmonic filters, and harmonic carcellation electric current content is to the harm of electrical network substantially fully.
Description of drawings
Fig. 1 is circuit theory diagrams of the present invention.
Embodiment
The present invention reduces UPS toward the harmonic wave discharged device of electrical network, with 160KVA UPS is example, as shown in Figure 1, comprise three-phase two winding phase shifting transformers, 11 subharmonic filters 2 and three- phase commutation bridge 3,4, the former limit input of the electrical network of three-phase two winding phase shifting transformers 400V voltage, three-phase two winding phase shifting transformers have star three-phase output winding 11 and triangle three-phase output winding 12, the input of the former limit of the electrical network of three-phase two winding phase shifting transformers also is serially connected with inductance L 1, and the effect of inductance L 1 is to suppress to power on surge and carry out the power factor (PF) adjustment.
The series connection m formula filter of 11 subharmonic filters 2 for being formed by connecting by inductance L 2 and capacitor C 1, when utilizing parallel resonance impedance greatly and the minimum characteristics of series resonant impedance improve the resistance characteristic, 11 subharmonic filters 2 are connected in the former limit of the electrical network input of three-phase two winding phase shifting transformers.
0 ° of phase place 480V three phase mains of star three-phase output winding 11 self couplings output of three-phase two winding phase shifting transformers, the star three-phase output winding 11 of three-phase two winding phase shifting transformers is connected in the input of three-phase commutation bridge 3 by inductance L 3, for three-phase commutation bridge 3 provides 0 ° of phase place 480V three phase mains, herein inductance L 3 can reduce power on surge with improve load cos θ 0 ° of self coupling output mutually.The triangle three-phase output winding 12 of three-phase two winding phase shifting transformers is with respect to+30 ° of phase shift 480V three phase mains of star three-phase output winding 11 outputs, the triangle three-phase output winding 12 of three-phase two winding phase shifting transformers is connected in the input of three-phase commutation bridge 4, for three-phase commutation bridge 4 provides+30 ° of phase shift 480V three phase mains.
The triangle three-phase output winding 12 of three-phase two winding phase shifting transformers is designed to the built-in leakage inductance of twin-core, promptly adopts short-circuit impedance to be designed to 11%, and quite triangle output crosstalk sense is 1.43mH/117.2A as calculated, and is cost-saved.
Star three-phase output winding 11, the triangle three-phase output winding 12 of three-phase two winding phase shifting transformers are powered respectively and are given three- phase commutation bridge 3,4, three- phase commutation bridge 3,4 common powering loads in parallel.For three- phase commutation bridge 3,4 can be conducted electricity simultaneously, realize that parallel running gets load balance, between three- phase commutation bridge 3,4, be connected with interphase reactor L
P
Reduction UPS of the present invention is toward the harmonic wave discharged device of electrical network, 0 ° of phase place 480V three phase mains of star three-phase output winding 11 self couplings output of three-phase two winding phase shifting transformers ,+30 ° of phase shift 480V three phase mains of triangle three-phase output winding output, and these two groups of three phase mains are connected to the input of three- phase commutation bridge 3,4 respectively, three-phase commutation bridge is equivalent to six-phhase circuit, and therefore the three-phase commutation bridge by 30 ° of two groups of phase differences just obtains 12 commutating phase circuit.Owing to adopted 12 commutating phase circuit, 5,7,17,19 ... subharmonic is cancelled out each other, and the intensity maximum is 11 subharmonic in the remaining 12K+1 subharmonic, and therefore, the present invention is provided with 11 subharmonic filters 2 at the former limit input of three-phase two winding phase shifting transformers.The number of phases the more, the minimum subfrequency in the commutating voltage is higher, its amplitude is littler, more near direct voltage, filtering also more easily, the present invention is in conjunction with 12 commutating phase circuit and 11 subharmonic filters, harmonic carcellation electric current content is to the harm of electrical network substantially fully.
Among the present invention, three-phase two winding phase shifting transformers are the optimal design of employing self coupling/isolation of reducing cost, and it is 0.6 times that iron core area of section St is saved, and reduces cost greatly.And for raising the efficiency, three-phase two winding phase shifting transformers adopt the step-up transformer of 380/480V.
When the present invention used, best 12 commutating phase devices can provide 100% redundancy, are the twice of rated capacity value, except reducing harmonic content, provided the rectifier of double copies, thereby increased the reliability of UPS complete machine.
Claims (6)
1, reduce UPS toward the harmonic wave discharged device of electrical network, it is characterized in that: comprise three-phase two winding phase shifting transformers, 11 subharmonic filters and two groups of three-phase commutation bridges, above-mentioned three-phase two winding phase shifting transformers have star three-phase output winding and triangle three-phase output winding, above-mentioned 11 subharmonic filters are connected in the former limit of the electrical network input of above-mentioned three-phase two winding phase shifting transformers, the star three-phase output winding of above-mentioned three-phase two winding phase shifting transformers is connected in the input of above-mentioned one group of three-phase commutation bridge, and the triangle three-phase output winding of above-mentioned three-phase two winding phase shifting transformers is connected in the input of above-mentioned another group three-phase commutation bridge.
2, reduction UPS according to claim 1 is toward the harmonic wave discharged device of electrical network, and it is characterized in that: the former limit of the electrical network input of above-mentioned three-phase two winding phase shifting transformers is serially connected with inductance.
3, reduction UPS according to claim 1 is characterized in that toward the harmonic wave discharged device of electrical network: the star three-phase output winding of above-mentioned three-phase two winding phase shifting transformers is serially connected with another inductance.
4, reduction UPS according to claim 1 is toward the harmonic wave discharged device of electrical network, and it is characterized in that: above-mentioned three-phase two winding phase shifting transformers are the self coupling isolating transformer.
5, reduction UPS according to claim 1 is characterized in that toward the harmonic wave discharged device of electrical network: above-mentioned 11 subharmonic filters are series connection m formula filter.
6, reduction UPS according to claim 1 is characterized in that: be connected with interphase reactor between above-mentioned two groups of three-phase commutation bridges toward the harmonic wave discharged device of electrical network.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100280223A CN101316068A (en) | 2008-05-13 | 2008-05-13 | Device for reducing harmonic wave discharged by UPS to electric network |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100280223A CN101316068A (en) | 2008-05-13 | 2008-05-13 | Device for reducing harmonic wave discharged by UPS to electric network |
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| CN101316068A true CN101316068A (en) | 2008-12-03 |
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| CNA2008100280223A Pending CN101316068A (en) | 2008-05-13 | 2008-05-13 | Device for reducing harmonic wave discharged by UPS to electric network |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101951171A (en) * | 2010-08-26 | 2011-01-19 | 苏州博远特种变压器有限公司 | Transforming device |
| WO2013149458A1 (en) * | 2012-04-01 | 2013-10-10 | 广东易事特电源股份有限公司 | Ups power source based on phase-shifting auto-transformer and dual 6-pulse rectifiers |
| EP2765692A3 (en) * | 2012-11-21 | 2015-09-30 | Rolls-Royce plc | An electrical system with an arrangement for filtering rectifier-generated 5th and 7th order current harmonics |
| CN105606887A (en) * | 2015-11-27 | 2016-05-25 | 国网湖南节能服务有限公司 | Energy consumption metering device of six-phase power supply equipment |
| CN111181144A (en) * | 2020-02-18 | 2020-05-19 | 北京捷安通达科贸有限公司 | Self-coupling pulse current discharge device |
-
2008
- 2008-05-13 CN CNA2008100280223A patent/CN101316068A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101951171A (en) * | 2010-08-26 | 2011-01-19 | 苏州博远特种变压器有限公司 | Transforming device |
| WO2013149458A1 (en) * | 2012-04-01 | 2013-10-10 | 广东易事特电源股份有限公司 | Ups power source based on phase-shifting auto-transformer and dual 6-pulse rectifiers |
| EP2765692A3 (en) * | 2012-11-21 | 2015-09-30 | Rolls-Royce plc | An electrical system with an arrangement for filtering rectifier-generated 5th and 7th order current harmonics |
| US9184591B2 (en) | 2012-11-21 | 2015-11-10 | Rolls-Royce Plc | Electrical system |
| CN105606887A (en) * | 2015-11-27 | 2016-05-25 | 国网湖南节能服务有限公司 | Energy consumption metering device of six-phase power supply equipment |
| CN111181144A (en) * | 2020-02-18 | 2020-05-19 | 北京捷安通达科贸有限公司 | Self-coupling pulse current discharge device |
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Open date: 20081203 |