CN203574373U - Parallel-series filter compensation device - Google Patents
Parallel-series filter compensation device Download PDFInfo
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- CN203574373U CN203574373U CN201320756629.XU CN201320756629U CN203574373U CN 203574373 U CN203574373 U CN 203574373U CN 201320756629 U CN201320756629 U CN 201320756629U CN 203574373 U CN203574373 U CN 203574373U
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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]
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Abstract
The utility model discloses a parallel-series filter compensation device comprising an active power filter compensation unit, a plurality of reactive dynamic compensation units, a wire inlet molded case circuit breaker, a lightning arrester and a current transformer. The active power filter compensation unit and the reactive dynamic compensation units are connected in parallel between a transformer end and a load end of a three-phase power grid. The load end is connected in series with the current transformer, and the current transformer sends acquired current state data of a load to the active power filter compensation unit. The active power filter compensation unit and the reactive dynamic compensation units are connected to the three-phase power grid through the wire inlet molded case circuit breaker. The active power filter compensation unit and the reactive dynamic compensation units are further connected in series with the lightning arrester. Comprehensive treatment of various power quality defects of a power distribution system is realized by connecting the active power filter compensation unit and the reactive dynamic compensation units in a parallel-series mode.
Description
Technical field
The utility model relates to a kind of filtering compensation device, particularly relates to a kind of hybrid type filtering compensation device of low voltage electrical equipment.
Background technology
At present, in the distribution system of modern enterprise, the power quality problem such as harmonic wave, voltage fluctuation flickering, three-phase imbalance becomes particularly serious.Especially in low-voltage distribution system, there is complicated harmonic source, as milling train, electric furnace, welding machine, banbury and charger etc.These loads produce more complicated harmonic current, jeopardize the normal operation of distribution system, even cause serious electric accident.Reactive power is low simultaneously, and production efficiency is in urgent need to be improved.
Yet traditional be Passively compensatedly difficult to comprehensively address these problems because of its congenital limitation.Especially for business build, the modern architecture such as hospital, data center, communication, a large amount of LED(light-emitting diodes), the access of the equipment such as frequency converter, desk lamp with dimmer switch and air-conditioning, greatly increased the weight of Harmfulness Caused by Harmonics, it is controlled based on automation in a large number simultaneously, to electrical network is compatible, higher requirement is proposed, thus in existing distribution system in the urgent need to a kind of efficient comprehensive solution.
Utility model content
The technical problems to be solved in the utility model is cannot be with best cost performance integrated treatment harmonic wave and reactive power power quality problem in compensation arrangement in prior art in order gram to solve, a kind of series-parallel connection filtering compensation device is provided, by series-parallel connection active power filtering compensating unit and reactive-load dynamic compensation unit, realizes various quality of power supply defects in distribution system are carried out to integrated treatment.
The utility model solves above-mentioned technical problem by following technical proposals:
The utility model provides a kind of series-parallel connection filtering compensation device, is characterized in, described series-parallel connection filtering compensation device comprises an active power filtering compensating unit, some reactive-load dynamic compensations unit, an inlet wire breaker of plastic casing, a lightning arrester and a current transformer;
Wherein said active power filtering compensating unit and reactive-load dynamic compensation unit are parallel between the transformer terminal and load end of three phase network;
Described load end is connected in series described current transformer, and described current transformer through signal condition unit, is delivered to CPU by the current status data of the load gathering;
Described active power filtering compensating unit and reactive-load dynamic compensation unit are connected to described three phase network by described inlet wire breaker of plastic casing; Described active power filtering compensating unit and reactive-load dynamic compensation unit are also and connect protected location---lightning arrester.
Active power filtering compensating unit of the present utility model is used for providing harmonic filtration and reactive power compensation, described reactive-load dynamic compensation unit is used for providing the compensation of passive electrical container switching, and those skilled in the art will recognize that described active power filtering compensating unit can adopt existing APF(Active Power Filter-APF) with SVG(reactive power compensator) technology carries out active power filtering compensation, the mode that reactive-load dynamic compensation unit can adopt LC to control is carried out Passively compensated or filter or equipment is realized.Because the present invention is incorporated into active power filtering unit and passive filtering compensating unit in a cabinet, need to adopt advanced modularization integrated technology, make to implement more convenient, flexible, economical in conjunction with the electric energy quality optimizing of operating mode with improvement.
And described inlet wire breaker of plastic casing, lightning arrester summation current transformer be protective device and current status checkout gear conventional in electrical engineering equally, so be equally no longer described in detail herein.
Preferably, described series-parallel connection filtering compensation device also comprises a rack, and described active power filtering compensating unit, reactive-load dynamic compensation unit, inlet wire breaker of plastic casing, lightning arrester summation current transformer are set in the frame of described rack.
By active power filtering compensating unit and reactive-load dynamic compensation unit are carried out, the integrated product of series-parallel connection is integrated to be innovated with Functional Design the utility model, thereby can only be contained in a rack, with respect to active power filtering compensating unit in prior art and reactive-load dynamic compensation discrete units, needed two sides rack is set, the space taking is less.
Preferably, described rack comprises a 3U cabinet or 4U cabinet, and described 3U cabinet or 4U cabinet are arranged at the top of described rack, and described active power filtering compensating unit is arranged in described 3U cabinet or 4U cabinet.
Described active power filtering compensating unit device is arranged in the 3U or 4U cabinet of a standard, has optimized control performance and cooling effect design, is convenient to dismounting and changes.
The cabinet size model that described 4U cabinet and 3U cabinet Shi You EIA (EIA) determine.
Preferably, described active power filtering compensating unit comprises a CPU and a signal condition unit, described active power filtering compensating unit is connected with described CPU with reactive-load dynamic compensation unit, and CPU is delivered in the signal being gathered by current transformer, process described signal condition unit.
Described active filter and reactive-load dynamic compensation unit are all according to active module embedded therein central interior treatment region, to send instruction to carry out co-ordination, thereby have realized active power filtering compensating unit and reactive-load dynamic compensation unit integral.
Preferably, the working condition information exchange of described active power filtering compensating unit and reactive-load dynamic compensation unit is crossed communication modes and is sent to a watch-dog.
Especially can adopt the bus communication modes such as RS485 to realize the communication of the work information between active power filtering compensating unit and reactive-load dynamic compensation unit and watch-dog.
Meeting on the basis of this area general knowledge, above-mentioned each optimum condition, can combination in any, obtains each preferred embodiments of the utility model.
Positive progressive effect of the present utility model is:
Series-parallel connection filtering compensation device of the present utility model compensates by active power filtering and passive electrical container switching compensates both combination, thereby adapts to existing enterprise complex working condition environment (load has produced load harmonic current and a large amount of perception of needs is idle).
But also there is following characteristics:
1) provide more large compensation capacity and cost performance, more intense to site environment adaptability.
2) compare with conventional passive electrical container switching, widened compensation range, suppose that the compensation capacity that active portion can provide is that Q0, passive electrical container capacity are Q1, the utility model energy compensation range is: ﹣ Q0～(Q0+Q1), and the compensation range of traditional capacitor switching compensation arrangement is only: 0～Q1.
3) traditional passive electrical container switching does not have harmonic filtration function, and operation is very undesirable in harmonic environment, and in the utility model, active part can provide harmonic filtration function, for passive electrical container provides a kind of better running environment.
4) the utility model only needs a regulator cubicle, occupies less space.
Accompanying drawing explanation
Fig. 1 is the topological circuit schematic diagram of the preferred embodiment of series-parallel connection filtering compensation device of the present utility model.
Fig. 2 is the control structure schematic diagram of the preferred embodiment of series-parallel connection filtering compensation device of the present utility model.
Embodiment
Mode below by embodiment further illustrates the utility model, but therefore the utility model is not limited among described scope of embodiments.
The utility model is compensated and is compensated both combinations with passive electrical container switching by active power filtering, has widened compensation range, more large compensation capacity and cost performance are provided.And modern enterprise operating mode loading condition is generally that the variation of accounting example major part is not very violent, and wherein the operation of accounting example smaller portions is complicated especially, not only produce load harmonic current, change more violent simultaneously, as long as the ratio of active part and passive part, just can finely compensate processing in appropriate distribution the utility model.
So made up preferably and adopted separately in the market the deficiency of active device or passive device, and all unit all adopt modular structure and are arranged in same rack, when taking still less space, be also convenient to combination and change, fill up blank in the market.
Below by following embodiment, further illustrate the utility model:
As shown in Figure 1, the series-parallel connection filtering compensation device of the present embodiment comprises active filtering compensation unit 1, reactive-load dynamic compensation unit 2, inlet wire breaker of plastic casing 3, lightning arrester 4 summation current transformers 5.
Described load end is connected in series described current transformer 5, and described current transformer 5 is electrically connected to described active power filtering compensating unit 1, and the current status data of the load of collection are sent to described active power filtering compensating unit 1.
Active power filtering compensating unit 1 and reactive-load dynamic compensation unit 2 are parallel between the transformer terminal and load end of three phase network.And described active power filtering compensating unit 1 and reactive-load dynamic compensation unit 2 be connected to described three phase network by inlet wire breaker of plastic casing 3, and described active power filtering compensating unit 1 and reactive-load dynamic compensation unit 2 are also connected to protected location---lightning arrester.
Active power filtering compensating unit 1, reactive-load dynamic compensation unit 2, inlet wire breaker of plastic casing 3, lightning arrester 4 summation current transformers 5 are arranged in same frame and are jointly installed on (not shown) in standard cabinet.
And those skilled in the art will be appreciated that active power filtering compensating unit 1 in described active power filtering compensating unit 1, reactive-load dynamic compensation unit 2, inlet wire breaker of plastic casing 3, lightning arrester 4 summation current transformers 5 and reactive-load dynamic compensation unit 2 are all the structures that adopts standard modular, passive dynamic compensation unit 2 is by 4 LC branch circuit parallel connections.
In addition as shown in Figure 2, the control procedure of another embodiment is by electric current on current transformer 5 Real-time Collection buses 6, through signal condition unit 12, deliver to the CPU 11 in active power filtering compensating unit, through CPU 11, calculate and analyze, according to analysis result, produce active power filtering compensating unit 1 and each reactive-load dynamic compensation unit 2 instructions, control active power filtering compensating unit 1 and 2 co-ordinations of reactive-load dynamic compensation unit, realize closed-loop control, reach gratifying effect.
And the working condition information exchange of described active power filtering compensating unit 1 and reactive-load dynamic compensation unit 2 crosses communication modes and send to a watch-dog (not shown), thereby be convenient to the current status of user monitoring compensation situation and load.
And as shown in fig. 1, described reactive-load dynamic compensation unit 2 mainly comprises following device: capacitor, reactor, contactor/controllable silicon, fuse group, connect busbar etc., and those skilled in the art based on structure in Fig. 1 can the reactive-load dynamic compensation unit 2 of clear and definite the present embodiment in the combination of above-mentioned device can composition capacity be 30kvar(quadrature kilovoltampere), the passive module of 60kvar, 120kvar carries out capacitor switching compensation.Wherein the reactive-load dynamic compensation unit 2 of Fig. 1 can be selected to carry out switching with thyristor throw-cut or contactor.
The present embodiment compensates by active power filtering and the operation principle of passive electrical container switching compensation is that 5 pairs of load currents of current transformer by load end sample, adopt Instantaneous Power Theory, automatic analysis goes out the size of load current electric current, active power filtering compensating unit 1 provides opposite direction size the same reactive current, and load reactive current is offseted.Reactive-load dynamic compensation unit 2 carries out work by reactive power compensation sight.
Specifically, 1) the real-time detection load current of current transformer 5 is Is, by Instantaneous Power Theory, analyzing load idle is Isq, when Isq is capacitive reactive power, by active power filtering compensating unit 1, provide perceptual reactive current to compensate, load perception is idle be less than active power filtering compensating unit 1 specified compensation capacity in the situation that, the perceptual reactive current that active power filtering compensating unit 1 such as can send at the capacity compensates, reach that test point is idle approaches 0, and then power factor approaches 1, in the situation that active power filtering compensating unit 1 rated capacity is less than load capacitive reactive power, active power filtering compensating unit 1 moves with rated capacity.
2) at the Isq of load-side for perception but while being less than the compensation capacity of reactive-load dynamic compensation unit 2, now active power filtering compensating unit 1 sends the capacitive reactive power electric current of the capacity of grade, carrys out the reactive requirement of compensating load, compensation afterwards power factor approaches 1.
3) Isq of load-side is perception, be greater than the compensation capacity of reactive-load dynamic compensation unit 2, by predefined working method, the switching time is to dropping into automatically reactive-load dynamic compensation unit 2, insufficient section is provided by active power filtering compensating unit 1, and the power factor after compensation approaches 1.
4) when load is out of service, because 3) in dropped into reactive-load dynamic compensation unit 2, before the mute time, there will be overcompensation situation, overcompensation capacitor, by active power filtering compensating unit 1, by idle the compensating of rated capacity perception, delay time arrives, the capacitor that excision drops into automatically, active power filtering compensating unit 1, according to detection case, changes idle output automatically.
As mentioned above, the series-parallel connection filtering compensation device of the present embodiment can be according to actual load situation, and rationally active power filtering compensating unit 1 and reactive-load dynamic compensation unit 2 combine, and reach the object of harmonic filtration and reactive power compensation.
Although more than described embodiment of the present utility model, it will be understood by those of skill in the art that these only illustrate, protection range of the present utility model is limited by appended claims.Those skilled in the art is not deviating under the prerequisite of principle of the present utility model and essence, can make various changes or modifications to these execution modes, but these changes and modification all fall into protection range of the present utility model.
Claims (5)
1. a series-parallel connection filtering compensation device, is characterized in that, described series-parallel connection filtering compensation device comprises an active power filtering compensating unit, some reactive-load dynamic compensations unit, an inlet wire breaker of plastic casing, a lightning arrester and a current transformer;
Wherein said active power filtering compensating unit and reactive-load dynamic compensation unit are parallel between the transformer terminal and load end of three phase network;
Described load end is connected in series described current transformer, and described current transformer is sent to described active power filtering compensating unit by the current status data of the load of collection;
Described active power filtering compensating unit and reactive-load dynamic compensation unit are connected to described three phase network by described inlet wire breaker of plastic casing; Described active power filtering compensating unit and reactive-load dynamic compensation unit are also connected in parallel to described lightning arrester.
2. series-parallel connection filtering compensation device as claimed in claim 1, it is characterized in that, described series-parallel connection filtering compensation device also comprises a rack, and described active power filtering compensating unit, reactive-load dynamic compensation unit, inlet wire breaker of plastic casing, lightning arrester summation current transformer are set in the frame of described rack.
3. series-parallel connection filtering compensation device as claimed in claim 2, it is characterized in that, described rack comprises a 3U cabinet or 4U cabinet, and described 3U cabinet or 4U cabinet are arranged at the top of described rack, and described active power filtering compensating unit is arranged in described 3U cabinet or 4U cabinet.
4. series-parallel connection filtering compensation device as claimed in claim 1, it is characterized in that, described active power filtering compensating unit comprises a CPU and a signal condition unit, described active power filtering compensating unit is connected with described CPU with reactive-load dynamic compensation unit, and the signal being gathered by current transformer is delivered to CPU through described signal condition unit.
5. series-parallel connection filtering compensation device as claimed in claim 4, is characterized in that, the working condition information exchange of described active power filtering compensating unit and reactive-load dynamic compensation unit is crossed communication modes and sent to a watch-dog.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320756629.XU CN203574373U (en) | 2013-11-25 | 2013-11-25 | Parallel-series filter compensation device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320756629.XU CN203574373U (en) | 2013-11-25 | 2013-11-25 | Parallel-series filter compensation device |
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| CN203574373U true CN203574373U (en) | 2014-04-30 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103928929A (en) * | 2014-04-28 | 2014-07-16 | 沈阳汇丰电力自动化有限公司 | High-capacity parallel mixed-type active power filter |
| US9703340B1 (en) | 2015-12-18 | 2017-07-11 | International Business Machines Corporation | Intermittently redistributing energy from multiple power grids in a data center context |
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2013
- 2013-11-25 CN CN201320756629.XU patent/CN203574373U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103928929A (en) * | 2014-04-28 | 2014-07-16 | 沈阳汇丰电力自动化有限公司 | High-capacity parallel mixed-type active power filter |
| US9703340B1 (en) | 2015-12-18 | 2017-07-11 | International Business Machines Corporation | Intermittently redistributing energy from multiple power grids in a data center context |
| US10649510B2 (en) | 2015-12-18 | 2020-05-12 | International Business Machines Corporation | Intermittently redistributing energy from multiple power grids in a data center context |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20221123 Address after: 441000 No. 59, Guanyu Road, Tuanshan Town, Xiangyang High tech Development Zone, Hubei Province Patentee after: Hubei Chasri New Energy Technology Co.,Ltd. Address before: 200331 Building 9, Lane 88, Wuwei Road, Putuo District, Shanghai Patentee before: Shanghai Surpass Sun Electric Co.,Ltd. |
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| TR01 | Transfer of patent right | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 441000 No. 59, Guanyu Road, Tuanshan Town, Xiangyang High tech Development Zone, Hubei Province Patentee after: Borg Warner New Energy (Xiangyang) Co.,Ltd. Address before: 441000 No. 59, Guanyu Road, Tuanshan Town, Xiangyang High tech Development Zone, Hubei Province Patentee before: Hubei Chasri New Energy Technology Co.,Ltd. |
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Granted publication date: 20140430 |
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| CX01 | Expiry of patent term |