CN202353228U - Three-phase unbalanced load adjustment device for 0.4kV power distribution area - Google Patents
Three-phase unbalanced load adjustment device for 0.4kV power distribution area Download PDFInfo
- Publication number
- CN202353228U CN202353228U CN 201120397039 CN201120397039U CN202353228U CN 202353228 U CN202353228 U CN 202353228U CN 201120397039 CN201120397039 CN 201120397039 CN 201120397039 U CN201120397039 U CN 201120397039U CN 202353228 U CN202353228 U CN 202353228U
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- China
- Prior art keywords
- phase
- current transformer
- load
- power distribution
- power supply
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- Expired - Fee Related
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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
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
Abstract
The utility model discloses a three-phase unbalanced load adjustment device for a 0.4kV power distribution area. A three-phase power supply is connected with an air switch and a current transformer (for facilitating the matching of an ammeter), a part between the air switch and the current transformer is connected with a change-over switch through a lead, the current transformer (matched with the ammeter) is then accessed to a single-phase load, the change-over switch is used for transforming the phase sequence of the three-phase power supply to randomly regulate the single-phase load among a phase A, a phase B or a phase C of the three-phase power supply so as to achieve the purpose of basically balancing the three-phase loads. The utility model has the technical effects that: the three-phase unbalanced load adjustment device is convenient and rapid to regulate, can be increased in adjustment number and shortened in adjustment period along with load changes, and can be adjusted in each time period every day; the power failure time is reduced, the power failure range is narrowed, and the power supply reliability is enhanced; and the neutral current is reduced and the line los rate of a power distribution area is reduced.
Description
Technical field
The utility model relates to a kind of adjusting device, relates in particular to a kind of 0.4kV power distribution station three-phase imbalance load adjusting device.
Background technology
Be engaged in handling in the process at daily electric industry; Partial service is not owing to consider the three-phrase burden balance problem; Can cause platform district three-phrase burden balance fluctuation (transforming, increase newly platform district etc.) to occur like the migration of already expanding, load, platform district; The method of tradition adjustment three-phase imbalance load is: fixing 0.4kV mains side, and on overhead transmission line, directly will load is connected to B phase or C phase mutually from A; Adjustment (comprised and carries out various safety measures for up to 166 minutes; Interruption duration also needs 166 minutes simultaneously; And single-phase user's load generally just two, three hours its peak times of power consumption (as 10 o'clock-13 o'clock, 18 o'clock-21 o'clock) is adjusted load; Peak times of power consumption are mistake, does not reach the purpose of three-phrase burden balance.For improving power supply reliability, allow so long-time the power failure anything but.Therefore have only interruption duration, foreshorten to a few minutes even a few minutes at zero point, dwindle the power failure scope, could satisfy the requirement that guarantees power supply reliability.
Summary of the invention
The purpose of the utility model is to provide a kind of 0.4kV power distribution station three-phase imbalance load adjusting device, and this adjusting device is adjusted phase sequence to the bigger single-phase user of electric weight, the low district's three-phase load of presenting a theatrical performance as the last item on a programme of basic mean allocation; Reduce platform district three-phase load unbalance factor, can effectively improve circuit latter end client voltage, reduce platform district line loss rate; Can increase the adjustment number of times with load variations; Shorten adjustment cycle, every day, each time period all can be adjusted; Shorten interruption duration greatly, dwindle the power failure scope, improve power supply reliability, operating efficiency improves 20 times, and economic benefit is considerable, obvious social benefit.
The utility model is realized like this; It is made up of air switch, change over switch, current transformer; It is characterized in that three phase mains connects air switch and current transformer, between air switch and the current transformer through lead be connected change over switch, current transformer inserts single-phase load after joining ammeter.
Said change over switch is made up of fixed contact, moving contact, housing; The edge of housing is provided with four fixed contacts; Wherein three adjacent fixed contacts connect three leads of three phase mains (A phase, B phase, C phase) respectively; Another fixed contact is connected with current transformer through lead, and an end of moving contact connects the fixed contact that is connected with current transformer, and the other end of moving contact connects other three fixed contacts successively through rotating to distinguish.
The technique effect of the utility model is: easy to adjust quick, can increase the adjustment number of times with load variations, and shorten adjustment cycle, can increase the adjustment number of times with load variations, every day, each time period all can be adjusted; Reduce interruption duration, dwindle the power failure scope, improve power supply reliability; Reduce neutral current, reduce the power distribution station line loss rate.
Description of drawings
Fig. 1 is the schematic diagram of the utility model.
Fig. 2 is the structural representation of the utility model change over switch.
Embodiment
Like Fig. 1, shown in Figure 2, the utility model realizes like this, between air switch 1 and the current transformer 3 through the lead change over switch 2 that is connected in series.Said change over switch is made up of fixed contact 4, moving contact 5, housing 6; The edge of housing 6 is provided with four fixed contacts 4; Wherein three adjacent fixed contacts 4 connect three leads of three phase mains respectively; Another fixed contact is through the lead current transformer that is connected in series, and an end of moving contact 5 connects the fixed contact that is connected with current transformer 3, and the other end of moving contact 5 connects other three fixed contacts successively through rotating to distinguish.During use, insert a wherein phase conductor of three phase mains, thereby reach the problem of quick adjustment load according to three phase mains uncompensated load situation rotation probe.
Claims (2)
1. 0.4kV power distribution station three-phase imbalance load adjusting device; It is made up of air switch, change over switch, current transformer; It is characterized in that three phase mains connects air switch and current transformer, between air switch and the current transformer through lead be connected change over switch, current transformer inserts single-phase load after joining ammeter.
2. according to the said a kind of 0.4kV of claim 1 power distribution station three-phase imbalance load adjusting device; It is characterized in that said change over switch is made up of fixed contact, moving contact, housing; The edge of housing is provided with four fixed contacts; Wherein three adjacent fixed contacts connect three leads of three phase mains respectively; Another fixed contact is connected with current transformer through lead, and an end of moving contact connects the fixed contact that is connected with current transformer, and the other end of moving contact connects other three fixed contacts successively through rotating to distinguish.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120397039 CN202353228U (en) | 2011-10-18 | 2011-10-18 | Three-phase unbalanced load adjustment device for 0.4kV power distribution area |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120397039 CN202353228U (en) | 2011-10-18 | 2011-10-18 | Three-phase unbalanced load adjustment device for 0.4kV power distribution area |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202353228U true CN202353228U (en) | 2012-07-25 |
Family
ID=46542192
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120397039 Expired - Fee Related CN202353228U (en) | 2011-10-18 | 2011-10-18 | Three-phase unbalanced load adjustment device for 0.4kV power distribution area |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202353228U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105374588A (en) * | 2015-11-25 | 2016-03-02 | 国网山东省电力公司菏泽供电公司 | Low-voltage switch with adjustable phase line |
| CN105762818A (en) * | 2016-05-06 | 2016-07-13 | 国网吉林省电力有限公司电力科学研究院 | User three-phase imbalance adjustment method based on greedy strategy |
| CN106298299A (en) * | 2016-03-31 | 2017-01-04 | 南京鼎牌电器有限公司 | A kind of phase-change switch |
-
2011
- 2011-10-18 CN CN 201120397039 patent/CN202353228U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105374588A (en) * | 2015-11-25 | 2016-03-02 | 国网山东省电力公司菏泽供电公司 | Low-voltage switch with adjustable phase line |
| CN106298299A (en) * | 2016-03-31 | 2017-01-04 | 南京鼎牌电器有限公司 | A kind of phase-change switch |
| CN105762818A (en) * | 2016-05-06 | 2016-07-13 | 国网吉林省电力有限公司电力科学研究院 | User three-phase imbalance adjustment method based on greedy strategy |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120725 Termination date: 20121018 |