CN1885664A - Bias bridge type short circuit current limiter - Google Patents
Bias bridge type short circuit current limiter Download PDFInfo
- Publication number
- CN1885664A CN1885664A CN 200610027165 CN200610027165A CN1885664A CN 1885664 A CN1885664 A CN 1885664A CN 200610027165 CN200610027165 CN 200610027165 CN 200610027165 A CN200610027165 A CN 200610027165A CN 1885664 A CN1885664 A CN 1885664A
- Authority
- CN
- China
- Prior art keywords
- bias
- short circuit
- windings
- winding
- circuit current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
The short-circuit current limiter as bias bridge comprises: a saturation reactance circuit with an ac winding as two cylinder packets in series, a rectangular-cylinder bias winding, and T-shaped iron core to accommodate former packets; and a limiting reactor to form a bias current loop with former winding. This invention takes up less than 1% rated voltage, generates no additional harmonic, and can limit short-circuit current within 4-times conventional value.
Description
Technical field
What the present invention relates to is a kind of device of technical field of electricity, particularly a kind of bias bridge type short circuit current limiter.
Background technology
Along with the continuous development of electric power system and the growth of scale, system short circuit capacity increases sharply, and has reached the degree that present conventional circuit breaker interrupting capacity can't meet the demands.And in system, adopt effective current limiting technique, short circuit current can be restricted to lower level on the one hand, satisfy the requirement of rupturing capacity, can greatly reduce the dynamic and thermal effect current design value of electric equipment on the other hand, have great economic worth and social effect.At present research is more the superconduct short circuit current limiter, and superconductor technology is immature in the application technology of high-tension high-power occasion, and the cost costliness may what still do not having a large amount of practicability at present.The resonant mode flow restricter needs the rapid triggering electronic switch, and reliability and anti-interference are poor, and in the large load current system, required building-out capacitor quantity is very big, can't drop into practical application.With high costs and the claimed circuit of solid-state current limiter has the response speed that is exceedingly fast, and reliability is difficult to meet the demands.When saturation reactance formula short circuit current limiter takes place at big short circuit current, will produce very big even-order harmonic electric current in the direct current winding coil and be current source character, the bias supply condition of work is harsh, can not realize under the high-voltage large-capacity grade at all.
Find through literature search prior art, people such as BOENING H J write articles " The bridge-type fault current controller-A new FACTS controller " (" bridge-type fault current limiter-novel flexible AC transmission system flow restricter ") on Proceeding of PESSummer Meeting (power electronic system proceeding in 2002 summer) .2002.455-460, this article has been introduced a kind of fully controlled bridge road type superconductive failure current limiter.It is made up of thyristor bridge circuit, superconducting coil.When control thyristor when different trigger angle trigger, the equivalent inductance difference that flow restricter is showed when the control short circuit current.When trigger angle is 0, the inductance of the current-limiting inductance HTS during fault; When trigger angle was pi/2, the equivalent inductance of flow restricter electric current was infinitely great, was equivalent to circuit breaker this moment.Fully controlled bridge road type superconductive failure current limiter is by to the control of thyristor trigger angle, seals in the size of the impedance of circuit flexibly during control fault, can play the effect of adjusting trend when normal operation again.There are two problems in this flow restricter, and the one, thyristor will pass through short circuit current under short-circuit conditions, has fundamentally limited powerful application, is difficult to rise to the application of 500kV grade electrical network.The 2nd, the use of fully controlled bridge road type superconductive failure current limiter can be introduced a large amount of harmonic waves, and needs failure detector.
Summary of the invention
The objective of the invention is to overcome deficiency of the prior art, a kind of bias bridge type short circuit current limiter is provided, the stable and loss of voltage does not produce additional harmonic wave less than 1% rated voltage when making normal operation; When electrical network breaks down, be converted to big impedance at once, short circuit current is limited within the scope less than 4 times of normal state current; Fault is returned original state after eliminating immediately, to satisfy the requirement of circuit reclosing, can bear repeatedly the impact of fault during the short circuit, and dynamic response time is less than 1/2 cycle.
The present invention is achieved by the following technical solutions, and bias bridge type short circuit current limiter of the present invention comprises: saturation reactance bridge circuit and current limiting reactor.The saturable reactor bridge circuit is made up of three-limb core, AC Windings and magnetic bias winding.AC Windings is the cartridge type bag of two series connection, is enclosed within respectively on two side columns of three-limb core, and each winding has three taps.The magnetic bias winding is a rectangular cartridge type bag, is sleeved on the center pillar of three-limb core.Current limiting reactor constitutes the bias current loop by magnetic bias power supply and the magnetic bias winding that is enclosed within on the three-limb core center pillar.
Be insulating barrier and louvre between magnetic bias winding, AC Windings and the three-limb core, the coupling part between center pillar and two side columns is last yoke and lower yoke, is cross-over block between magnetic bias winding, AC Windings and last yoke, the lower yoke.
The sectional area of two side columns of three-limb core equates that the center pillar sectional area is greater than two times of the side column sectional area, promptly greater than two side column sectional area sums.Three-limb core two side columns, last yoke, lower yoke and center pillar constitute AC magnetic field loop and bias field loop.
AC Windings is made up of two windings, and they are set on two side columns of three-limb core, two windings in series.The magnetic bias winding is sleeved on the center pillar of three-limb core.Normal operating condition, the DC magnetic bias current that the magnetic bias DC power supply produces produces a direct current magnetomotive force at the magnetic bias winding, makes three-limb core be in degree of depth saturation condition, and AC Windings is connected in the transmission line.When specified alternating current passes through AC Windings, because it is saturated that iron core is in the degree of depth, this moment, iron core was equivalent to become air gap to alternating current, and AC Windings is in low induction reactance state in electrical network, therefore pressure drop is very low on the AC Windings, less than 1% circuit rated voltage.When short trouble occurring in the electric power system, the magnetomotive force that the electric current that moment increases produces AC Windings increases to and is enough to offset the magnetic bias magnetomotive force that the D.C. magnetic biasing winding is produced, flow restricter iron core on one side enters the unsaturation attitude by saturated mode, if the left side post of bridge circuit iron core between the line voltage distribution positive half period, last yoke, lower yoke and center pillar lose saturated, then in this half period, be equivalent to the single-phase transformer operating state between left side AC Windings and center pillar magnetic bias winding, it is saturated and do not participate in interacting that the right post enters more the degree of depth, and the current limiting reactor in the magnetic bias winding is played metering function by place in circuit automatically like this.In like manner during the circuit voltage negative half period, the right post, go up yoke, lower yoke and center pillar and lose saturatedly, insert current limiting reactor, volitional check the increase of short circuit current in the electrical network.
The present invention has substantive distinguishing features and marked improvement, and magnetic bias DC power supply of the present invention is in the electrical network secondary side, can carry out electrical isolation with primary side.When the saturation reactance bridge circuit is in the failure current limit state, withdrawing between AC coil on the saturated side column and center pillar magnetic bias winding is the equal of the transformer operating state, current limiting reactor place in circuit in the magnetic bias loop is played metering function, and the characteristic that not exclusively relies on ferromagnetic material is come current limliting, and therefore the characteristic to ferromagnetic material does not have special requirement.Pass through control after the fault to the magnetic bias DC power supply, make the magnetic bias DC power supply be in the inversion field suppression state, it is saturated that side column and middle column iron core are withdrawed from fast, enters transformer state, play the effect of quick limiting short-circuit current, the current limliting response time is less than 1/2 cycle.
Description of drawings
Fig. 1 saturation reactance bridge arrangement schematic diagram
Each winding connection figure of Fig. 2 bias bridge type short circuit current limiter
Embodiment
As shown in Figure 1, 2, the present invention includes: saturation reactance bridge circuit 1 and current limiting reactor 2.Saturation reactance bridge circuit 1 is made up of AC Windings 8, magnetic bias winding 9 and three-limb core 3, and AC Windings 8 is the tubular bag of two series connection, is enclosed within respectively on two side columns 4 of three-limb core, and magnetic bias winding 9 is a rectangular tubular bag, is enclosed within on the center pillar 5 of three-limb core 3.Current limiting reactor 2 constitutes the bias current loop by magnetic bias power supply and the magnetic bias winding 9 that is enclosed within on three-limb core 3 center pillars 5.
Between AC Windings 8, magnetic bias winding 9 and the three-limb core 3 insulating barrier 6 and louvre 7, coupling part between center pillar 5 and two side columns 4 is last yoke 10 and lower yoke 11, is cross-over block between AC Windings 8, magnetic bias winding 9 and last yoke 10, the lower yoke 11.
Two side columns 4 of three-limb core and last yoke 10, lower yoke 11 and center pillar 5 constitute AC magnetic field loop and bias field loop.
AC Windings 8 is connected in the transmission line by terminal F1, F2.Magnetic bias winding 9 terminal O, N connect the magnetic bias power supply.
Normal operating condition, the DC magnetic bias current that the magnetic bias DC power supply produces produces a direct current magnetomotive force at magnetic bias winding 9, makes three-limb core 3 be in degree of depth saturation condition, and AC Windings 8 is connected in the transmission line.When specified alternating current passes through AC Windings 8, because it is saturated that iron core is in the degree of depth, this moment, iron core was equivalent to become air gap to alternating current, and AC Windings 8 is in low induction reactance state in electrical network, therefore pressure drop is very low on the AC Windings 8, less than 1% circuit rated voltage.When short trouble occurring in the electric power system, the magnetomotive force that the electric current that moment increases produces AC Windings 8 increases to and is enough to offset the magnetic bias magnetomotive force that D.C. magnetic biasing winding 9 is produced, flow restricter iron core on one side enters the unsaturation attitude by saturated mode, if the left side post 4 of bridge circuit iron core between the line voltage distribution positive half period, last yoke 10, lower yoke 11 and center pillar 5 lose saturated, then left side AC Windings 8 and 9 of center pillar magnetic bias windings are equivalent to the single-phase transformer operating state in this half period, it is saturated and do not participate in interacting that the right post 4 enters more the degree of depth, and the current limiting reactor in magnetic bias winding 92 is played metering function by place in circuit automatically like this.In like manner during the circuit voltage negative half period, the right post 4, go up yoke 10, lower yoke 11 and center pillar 5 and lose saturatedly, insert current limiting reactor 2, volitional check the increase of short circuit current in the electrical network.
Claims (5)
1, a kind of bias bridge type short circuit current limiter, comprise: saturation reactance bridge circuit (1) and current limiting reactor (2), it is characterized in that, saturation reactance bridge circuit (1) is made up of AC Windings (8), magnetic bias winding (9) and three-limb core (3), AC Windings (8) is the tubular bag of two series connection, be enclosed within respectively on two side columns (4) of three-limb core, magnetic bias winding (9) is a rectangular tubular bag, is enclosed within on the center pillar (5) of three-limb core (3).
2, bias bridge type short circuit current limiter according to claim 1, it is characterized in that, in the described saturation reactance bridge circuit (1), between AC Windings (8), magnetic bias winding (9) and the three-limb core (3) insulating barrier (6) and louvre (7), coupling part between center pillar (5) and two side columns (4) is last yoke (10) and lower yoke (11), is cross-over block between AC Windings (8), magnetic bias winding (9) and last yoke (10), the lower yoke (11).
According to claim 1 or 2 described bias bridge type short circuit current limiters, it is characterized in that 3, two side columns (4) of described three-limb core (3) and last yoke (10), lower yoke (11) and center pillar (5) constitute AC magnetic field loop and bias field loop.
4, according to claim 1 or 2 described bias bridge type short circuit current limiters, it is characterized in that, described three-limb core (3), the sectional area of two side column (4) equates, center pillar (5) sectional area is greater than two times of side column (4) sectional area, promptly greater than two side columns (4) sectional area sum.
5, bias bridge type short circuit current limiter according to claim 1 is characterized in that, described current limiting reactor (2) constitutes the bias current loop by magnetic bias power supply and the magnetic bias winding (9) that is enclosed within on three-limb core (3) center pillar (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100271653A CN100424957C (en) | 2006-06-01 | 2006-06-01 | Bias bridge type short circuit current limiter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100271653A CN100424957C (en) | 2006-06-01 | 2006-06-01 | Bias bridge type short circuit current limiter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1885664A true CN1885664A (en) | 2006-12-27 |
| CN100424957C CN100424957C (en) | 2008-10-08 |
Family
ID=37583685
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100271653A Expired - Fee Related CN100424957C (en) | 2006-06-01 | 2006-06-01 | Bias bridge type short circuit current limiter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100424957C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101820170A (en) * | 2010-06-07 | 2010-09-01 | 山东大学 | Device and method for cutting off short-circuit current |
| CN102136728A (en) * | 2011-01-21 | 2011-07-27 | 山东大学 | Flexible combiner and control method thereof |
| CN102723704A (en) * | 2012-06-14 | 2012-10-10 | 武汉大学 | Magnetic switch type short-circuit current fault detection method and device for same |
| CN103323722A (en) * | 2013-07-11 | 2013-09-25 | 国家电网公司 | Direct current magnetic bias fault simulation structure for transformer |
| CN104412479A (en) * | 2011-12-09 | 2015-03-11 | Asg超导体股份公司 | Fault current limiter |
| CN114512971A (en) * | 2022-01-13 | 2022-05-17 | 武汉大学 | Hybrid excitation multifunctional saturated iron core alternating current fault current limiter and current limiting method |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH099499A (en) * | 1995-06-19 | 1997-01-10 | Hitachi Ltd | Current limiter |
| CN2279028Y (en) * | 1996-12-31 | 1998-04-15 | 武汉水利电力大学 | Adjustable arc-extinction winding |
| JP3544465B2 (en) * | 1997-12-25 | 2004-07-21 | 株式会社日立製作所 | Single-phase autotransformer |
| CN100414804C (en) * | 2003-06-26 | 2008-08-27 | 上海交通大学 | Biax arc suppression coil |
| CN2655487Y (en) * | 2003-09-27 | 2004-11-10 | 新疆特变电工股份有限公司 | Fault current-limiter used on magnetic flux compensation |
-
2006
- 2006-06-01 CN CNB2006100271653A patent/CN100424957C/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101820170A (en) * | 2010-06-07 | 2010-09-01 | 山东大学 | Device and method for cutting off short-circuit current |
| CN101820170B (en) * | 2010-06-07 | 2012-06-27 | 山东大学 | Device and method for cutting off short-circuit current |
| CN102136728A (en) * | 2011-01-21 | 2011-07-27 | 山东大学 | Flexible combiner and control method thereof |
| CN102136728B (en) * | 2011-01-21 | 2013-04-03 | 山东大学 | Flexible combiner and control method thereof |
| CN104412479A (en) * | 2011-12-09 | 2015-03-11 | Asg超导体股份公司 | Fault current limiter |
| CN102723704A (en) * | 2012-06-14 | 2012-10-10 | 武汉大学 | Magnetic switch type short-circuit current fault detection method and device for same |
| CN103323722A (en) * | 2013-07-11 | 2013-09-25 | 国家电网公司 | Direct current magnetic bias fault simulation structure for transformer |
| CN103323722B (en) * | 2013-07-11 | 2015-07-01 | 国家电网公司 | Direct current magnetic bias fault simulation structure for transformer |
| CN114512971A (en) * | 2022-01-13 | 2022-05-17 | 武汉大学 | Hybrid excitation multifunctional saturated iron core alternating current fault current limiter and current limiting method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100424957C (en) | 2008-10-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101609742B (en) | Self-energy-taking rapid-response controllable reactor | |
| EP2139088A1 (en) | Core-saturated superconductive fault current limiter and control method of the fault current limiter | |
| CN100424957C (en) | Bias bridge type short circuit current limiter | |
| CN103296636B (en) | A kind of HVDC gas-break switch based on self-maintained circuit | |
| WO2013163853A1 (en) | Reactor-type short circuit fault current limiter | |
| EP3343715A1 (en) | Short-circuit failure current limiter | |
| CN101789589B (en) | Mixed-type high-temperature superconducting short trouble current limiter | |
| CN102790382A (en) | Current limited soft connecting/disconnecting device | |
| CN101741076B (en) | YBCO high-temperature superconducting strip-based short circuit fault current limiter | |
| CN102684179A (en) | Hybrid short-circuit failure current limiter | |
| Tseng et al. | A modified bridge switch-type flux-coupling nonsuperconducting fault current limiter for suppression of fault transients | |
| CN101707364A (en) | Self-triggering DC reactor current limiter and applications thereof | |
| CN1728495A (en) | Quick current limiting type superconductive short circuit fault | |
| CN106300309A (en) | A kind of flexible direct current electric network fault current limiter with fast restoration capabilities | |
| CN103633632B (en) | A kind of saturated bridge type short circuit fault current limiter | |
| CN206332444U (en) | A kind of LC series resonances current-limiting apparatus | |
| CN103887782A (en) | Hybrid type flux coupling superconduction fault current limiter and current limitation method | |
| CN204481470U (en) | A kind of series compensation type fault current limiter controlled based on iron core | |
| CN102426896A (en) | Superconducting controlled reactor containing pulse width modulation (PWM) power control unit | |
| CN203932992U (en) | A kind of mixed type magnetic flux Coupled Superconducting fault current limiter | |
| CN103762576B (en) | Autotransducer type fault current limiter | |
| CN201549881U (en) | Self-triggered direct current reactor type current limiter | |
| CN110060857A (en) | A kind of power transformer that can eliminate excitation surge current and its application method | |
| CN206003611U (en) | Variable impedance transformer | |
| JP4469512B2 (en) | Saturable DC reactor type fault current limiter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| 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: 20081008 Termination date: 20110601 |