CN206992685U - A kind of three-phase magnetic saturation type fault current limiter - Google Patents
A kind of three-phase magnetic saturation type fault current limiter Download PDFInfo
- Publication number
- CN206992685U CN206992685U CN201720544592.2U CN201720544592U CN206992685U CN 206992685 U CN206992685 U CN 206992685U CN 201720544592 U CN201720544592 U CN 201720544592U CN 206992685 U CN206992685 U CN 206992685U
- Authority
- CN
- China
- Prior art keywords
- groups
- windings
- direct current
- iron core
- exchange
- 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.)
- Active
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 56
- 238000004804 winding Methods 0.000 claims abstract description 40
- 230000005284 excitation Effects 0.000 claims abstract description 12
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000010276 construction Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 12
- 238000010586 diagram Methods 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 239000011162 core material Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001595 flow curve Methods 0.000 description 1
Abstract
The utility model discloses a kind of three-phase magnetic saturation type fault current limiter, including two identical port type iron cores, three groups of exchange windings and two groups of direct current windings；Two port type iron cores are set up in parallel, and its side mutually leaned on is inner side iron core, and mutually remote side is outside iron core；Three groups of exchange windings are wound on two inner side iron cores in the same direction successively, and three groups of exchange windings are connected in three-phase circuit respectively；Two groups of direct current windings are wound on two outside iron cores respectively in a manner of differential concatenation, and two groups of direct current windings in series are in DC excitation circuit；The number of turn of two groups of direct current windings is identical, and the number of turn of three groups of exchange windings is different.The utility model is simple in construction, and cost is relatively low, stability and high efficiency, substantially reduces the manufacturing cost and running wastage of reactor, can effectively limit various forms of short troubles, and has the advantages that small volume, radiating are strong.
Description
Technical field
The invention belongs to field of power, and in particular to a kind of special iron core structure of three-phase reactor.
Background technology
As power system must develop, the capacity of power system is increasing, while when short trouble occurs for system, it is short
Appearance of a street amount and short circuit current are all rendered as the trend risen year by year, therefore the research of reactor is highly important.When system is sent out
When raw short trouble, failure current limit reactor can the size of effectively limiting short-circuit current short circuit current is limited to
Within rupturing capacity, breaker is coordinated to be acted.
The magnetic saturation switching mode fault current limiter of Recent study, can be presented Low ESR, no in system worked well
The normal work of influence system, when short trouble occurs, high impedance status is quickly entered, so as to be carried out to short-circuit current
Effective limitation.The operation principle of magnetic saturation switching mode fault current limiter be by increasing direct-flow magnet exciting coil, it is normal in system
By the way that excitation caused by DC excitation caused by DC coil in iron core and AC coil is superimposed during work, so that iron core
Into saturation state, low resistance state is rendered as, does not influence the normal work of system.And when short trouble occurs for system, due to handing over
Stream fault current steeply rises so that after excitation superposition caused by alternating current and DC current, iron core enters unsaturated shape
State, so as to return as high-impedance state, to reach the effect of limitation short-circuit current.
But traditional three-phase magnetic saturation switching mode fault current limiter in power network in use, need to use six iron cores,
The cost of reactor manufacture is considerably increased, simultaneously because the increase of iron core so that the iron loss of reactor when in use is also significantly
Increase, is totally unfavorable for power system.
The content of the invention
Goal of the invention：In order to overcome the deficiencies in the prior art, the present invention provides a kind of three-phase magnetic saturation type failure
Current limiter, have the characteristics that simple in construction, cost is relatively low, save space, can effectively limit various forms of short troubles, greatly
The big manufacturing cost and running wastage for reducing reactor, thermal diffusivity is strong while stability and high efficiency.
Technical scheme：To achieve the above object, the technical solution adopted by the present invention is：
A kind of three-phase magnetic saturation type fault current limiter, including two identical port type iron cores, three groups of AC coil windings
And two groups of DC coil windings；
Wherein, two port type iron cores are set up in parallel, and its side mutually leaned on is inner side iron core, and mutually remote side is outer
Side iron core；Three groups of exchange windings are wound on two inner side iron cores in the same direction successively, and three groups of exchange windings are connected on three-phase respectively
Between AC power and system load；Two groups of direct current windings are wound on two outside iron cores respectively in a manner of differential concatenation, and
Two groups of direct current winding differential concatenations are in DC excitation circuit.
Liang Ge iron core middle columns are wound on by using by three-phase windings simultaneously so that new three-phase magnetic switch type failure current limit
Device only needs two iron core cans to realize the current limiting capacity to three phase short circuit fault, substantially reduces conventional three-phase magnetic switch type
The manufacturing cost of fault current limiter, while iron loss when reducing operation etc..
Further, the number of turn of two groups of direct current windings is identical, and the number of turn of three groups of exchange windings as needed can be with
It is different.Because two DC excitation windings use differential concatenation connection, the number of turn is identical, and therefore, DC excitation is in AC coil
Caused harmonic wave is also cancelled, so as to reduce power attenuation.
Further, the exchange winding and direct current winding are made of silk bag flat type copper wire, and port type iron core uses silicon
Steel disc is made, and cost is relatively low and magnetic conduction ability is strong.
Further, the section of the port type iron core can use circular, ellipse or rectangle.
Beneficial effect：A kind of three-phase magnetic saturation type fault current limiter provided by the invention, relative to prior art, have with
Lower advantage：1st, as traditional three-phase magnetic switch type fault current limiter, when the systems are operating normally, current limiter is rendered as low-resistance
Anti- state, high impedance can be rendered as rapidly when single-phase, two-phase, three phase short circuit fault occurs in system, effectively limitation short circuit electricity
The size of stream；
2nd, can largely subtract compared to traditional three-phase magnetic switch type fault current limiter, structure proposed by the present invention
Core material required for few current limiter, reduce the manufacturing cost of reactor；
3rd, due to the reduction of iron core number, therefore in normal work, iron loss also reduces much to a certain extent, makes
The efficiency for obtaining reactor is improved.
Brief description of the drawings
Fig. 1 is the circuit theory diagrams of the embodiment of the present invention；
Fig. 2 is the structural representation of the embodiment of the present invention；
Fig. 3 is reactor current limitation effect analogous diagram of the present invention in single-line to ground fault；
Fig. 4 is reactor current limitation effect analogous diagram of the present invention in two-phase grounding fault；
Fig. 5 is reactor current limitation effect analogous diagram of the present invention in three-phase ground short circuit；
Figure includes：1st, 7-port type iron core, 4,5,6-exchange winding, 2,3-direct current winding.
Embodiment
Below in conjunction with the accompanying drawings and embodiment is further described to the present invention.
It is a kind of three-phase magnetic saturation type fault current limiter as shown in Figure 1, including two identical port type iron cores, three groups of friendships
Flow coil windings 4,5,6 and two groups of DC coil windings 2,3；
Wherein, two port type iron cores 1,7 are set up in parallel, and its side mutually leaned on is inner side iron core, and mutually remote side
For outside iron core；Three groups of exchange windings 4,5,6 are wound on two inner side iron cores in the same direction successively, and three groups of exchange windings 4,5,6
AC power AC and load R are connected on respectivelyLBetween, and form A, B, C three-phase alternating current loop；Two groups of direct current windings 2,3 are with anti-
It is wound on respectively to series system on two outside iron cores, and two groups of direct current windings 2,3 differential concatenations are in switch S2, DC excitation
Between power supply DC and resistance R2, and form DC excitation loop.
As shown in Fig. 2 the number of turn of two groups of direct current windings 2,3 is identical, and three groups of exchange windings 4,5,6 coilings in the same direction,
But the number of turn can be different；The exchange winding 4,5,6 and direct current winding 2,3 are made of silk bag flat type copper wire, and hollow iron
Core 1,7 is made of DQ120-30 silicon steel sheets.
In the present invention, the section of the port type iron core can use circular, ellipse or rectangle, and the sectional area of iron core,
Gas length of coil turn and iron core etc. is determined by the capacity of short trouble and the reactance value of required reactor.
The operation principle of the present invention is as follows：
When switching S2 closures, DC excitation circuit charges to reactor, now effect of the reactor in DC excitation
Saturation state is issued to, now reactor is rendered as low resistance state；When short trouble occurs for system, because alternating current circuit is dashed forward
So increase, in positive half period, excessive alternating current causes caused magnetic linkage and DC coil in AC coil in the core 1
Caused magnetic linkage, which subtracts each other, can not cause iron core to enter saturation state, and now reactor is rendered as high impedance status, so as to short circuit
Electric current is limited, and in iron core 7, exchange magnetic linkage and direct current magnetic linkage is overlapped mutually, therefore iron core remains as saturation state, presents
For low impedance state；In negative half-cycle, due in opposite direction, therefore now iron during sense of current bucket positive half period in AC coil
Exchange magnetic linkage and direct current magnetic linkage in core 1 are overlapped mutually, and now iron core 1 is rendered as saturation state, are rendered as low resistance state, and iron core
Exchange magnetic linkage and direct current magnetic linkage in 7 are cancelled out each other, therefore iron core 7 exits saturation state, is rendered as high-impedance state, short so as to limit
The size of road electric current.
Occur single-phase, two-phase to three-phase circuit below by finite element emulation software, the three-phase ground short trouble moment,
The current limitation effect of three-phase magnetic saturation type fault current limiter is emulated in the present invention.
As shown in figure 3, at the 0.1s moment, ground short circuit occurs for A phases, failure when now dotted line is without installation reactor
Current curve, solid line are the current curve after current limliting when having installed the three-phase magnetic saturation type fault current limiter additional, are not difficult to observe
It was found that Three phase magnetic switch type reactor in system single-phase fault with certain current limitation effect (current limiting capacity size and root
Realized according to required current limliting than adjustment coil count).
As shown in figure 4, at the 0.1s moment, ground short circuit failure all occurs for A, B two-phase, and now dotted line is without installation reactance
The fault current curve of A phases during device, solid line are the electricity of A phases after current limliting when having installed the three-phase magnetic saturation type fault current limiter additional
Flow curve, during by Fig. 4 it can be found that relative to singlephase earth fault, the current limitation effect of current limiter can be relatively weaker, but according to
Can so have good current limitation effect (current limiting capacity size and according to required current limliting ratio adjust coil count realize).
As shown in figure 5, at the 0.1s moment, ground short circuit failure all occurs for three-phase, and now dotted line is without installation reactor
When A phases fault current curve, solid line is the electric current of A phases after current limliting when having installed the three-phase magnetic saturation type fault current limiter additional
Curve, by Fig. 5 it can be found that the current limitation effect of three-phase ground failure and double earthfault approaches, but relative to single-phase earthing
Current limitation effect during failure is slightly poor, but can still have good current limitation effect, and the moment can occur in failure rapidly will be short
Road electric current is limited.(current limiting capacity size and according to required current limliting ratio adjust coil count realize).
Described above is only the preferred embodiment of the present invention, it should be pointed out that：For the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (4)
1. a kind of three-phase magnetic saturation type fault current limiter, it is characterised in that including two identical port type iron cores, three groups of exchanges
Winding and two groups of direct current windings；
Wherein, two port type iron cores are set up in parallel, and its side mutually leaned on is inner side iron core, and mutually remote side is outside iron
Core；Three groups of exchange windings are wound on two inner side iron cores in the same direction successively, and three groups of exchange windings are connected on three-phase alternating current respectively
In circuit；Two groups of direct current windings are wound on two outside iron cores respectively, and two groups of direct current windings are accessed in a manner of differential concatenation
In DC excitation circuit.
A kind of 2. three-phase magnetic saturation type fault current limiter according to claim 1, it is characterised in that two groups of direct currents around
The number of turn of group is identical.
A kind of 3. three-phase magnetic saturation type fault current limiter according to claim 1, it is characterised in that it is described exchange winding and
Direct current winding is made of silk bag flat type copper wire, and port type iron core is made of silicon steel sheet.
A kind of 4. three-phase magnetic saturation type fault current limiter according to claim 1, it is characterised in that the port type iron core
Section be circular, ellipse or rectangle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720544592.2U CN206992685U (en) | 2017-05-15 | 2017-05-15 | A kind of three-phase magnetic saturation type fault current limiter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720544592.2U CN206992685U (en) | 2017-05-15 | 2017-05-15 | A kind of three-phase magnetic saturation type fault current limiter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206992685U true CN206992685U (en) | 2018-02-09 |
Family
ID=61389391
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720544592.2U Active CN206992685U (en) | 2017-05-15 | 2017-05-15 | A kind of three-phase magnetic saturation type fault current limiter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206992685U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107181246A (en) * | 2017-05-15 | 2017-09-19 | 东南大学 | A kind of three-phase magnetic saturation type fault current limiter |
-
2017
- 2017-05-15 CN CN201720544592.2U patent/CN206992685U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107181246A (en) * | 2017-05-15 | 2017-09-19 | 东南大学 | A kind of three-phase magnetic saturation type fault current limiter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102646968B (en) | Reactor type short-circuit fault current limiter | |
| CN101609742B (en) | Self-energy-taking rapid-response controllable reactor | |
| EP2139088B1 (en) | Core-saturated superconductive fault current limiter and control method of the fault current limiter | |
| CN101707364A (en) | Self-triggering DC reactor current limiter and applications thereof | |
| CN206497818U (en) | Novel magnetic control reactor | |
| CN103928936B (en) | For reducing converter and the conversion equipment that transformer is affected by zero-sequence current | |
| CN103633632B (en) | A kind of saturated bridge type short circuit fault current limiter | |
| CN206992685U (en) | A kind of three-phase magnetic saturation type fault current limiter | |
| CN101291065B (en) | Linear harmonic suppressing apparatus in low voltage distributing network | |
| CN100424957C (en) | Bias bridge type short circuit current limiter | |
| CN202840498U (en) | Novel magnetic-shielding air core transformer coupling bridge type solid-state current limiter | |
| CN201656908U (en) | Frequency-changing and energy-saving control cabinet for oil pumping unit | |
| CN202178139U (en) | Two-split rectifier transformer | |
| CN204481470U (en) | A kind of series compensation type fault current limiter controlled based on iron core | |
| CN204497043U (en) | The full leakage field of magnetic shunt type reclaims coaxial double winding controllable impedance reactor | |
| CN201130853Y (en) | Fault current limiting device | |
| CN206533298U (en) | Non- PT electricity getting devices with high-tension fuse | |
| CN107181246A (en) | A kind of three-phase magnetic saturation type fault current limiter | |
| CN202008919U (en) | Zigzag transformer for low-voltage distribution network | |
| CN102426896A (en) | Superconducting controlled reactor containing pulse width modulation (PWM) power control unit | |
| CN201549881U (en) | Self-triggered direct current reactor type current limiter | |
| CN201294382Y (en) | Zero sequence harmonic filtering device for low-pressure system | |
| CN201608028U (en) | Self-induction controllable reactor duplex winding structure | |
| CN209592959U (en) | The relay protection system of DC distribution net | |
| CN203491073U (en) | On-load capacity regulating transformer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |