CN201549881U - Self-triggered direct current reactor type current limiter - Google Patents
Self-triggered direct current reactor type current limiter Download PDFInfo
- Publication number
- CN201549881U CN201549881U CN2009202547597U CN200920254759U CN201549881U CN 201549881 U CN201549881 U CN 201549881U CN 2009202547597 U CN2009202547597 U CN 2009202547597U CN 200920254759 U CN200920254759 U CN 200920254759U CN 201549881 U CN201549881 U CN 201549881U
- Authority
- CN
- China
- Prior art keywords
- reactor
- current
- self
- triggering
- phase
- 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.)
- Expired - Fee Related
Links
Images
Abstract
The utility model discloses a self-triggered direct current reactor type current limiter, which comprises a rectifier bridge circuit consisting of diodes; wherein, two direct current output ports of the rectifier bridge circuit are connected with a current limiting reactor in parallel, the current limiting reactor is primarily composed of a main winding, a bias magnetic winding and an iron core; the bias magnetic winding is connected with the main winding of the reactor serially, a control switch loop consisting of a solid switch and a triggering device is connected with two ends of the bias magnetic winding in parallel, the solid switch adopts self-triggered control mode without additional power supply and control leads, thus more reliable and safer operation is possible. The utility model is connected between power supply and load of single-phase or three-phase loops serially, which has the advantages of rapid switch action, short time delay and rapid recovery and can limit fault short-circuit current, reduce steady state current distortion and improve reliability of security operation of power system.
Description
Technical field
The utility model relates to a kind of electric power system current-limiting apparatus, particularly a kind of reactor type flow restricter that is used for transmission and distribution network restriction short-circuit current.
Background technology
Along with the fast lifting of China's modernization of industry degree, there is the electric power system scale of important leverage effect also constantly to enlarge to it thereupon, short circuit current is soaring year by year in the electric power system.Short circuit current exceeds standard becomes the significant problem that power system planning, design, operation face.
The measure of limiting short-circuit current commonly used is or the operational mode of change network system, or inserts current-limiting apparatus in system.The former is the operation of electrical network layering and zoning, optimizes power supply and inserts.But reasonably the layering and zoning embodiment needs appropriate network architecture as support, and under the situation of power shortage, the layering and zoning operation often is difficult to realize.Simultaneously should see that also layering and zoning is accompanied by some negative effects such as partial electric grid power supply reliability and stability decreases; The latter comprises the common series reactor of employing, high-capacity and high-speed switch and reactor shunting means, novel short circuit current limiter.
Wherein, common series reactor is that the reactor of blocked impedance is connected into electrical network, is a kind of traditional current limiting technique, and operational mode is simple, safe and reliable, but the trend that influences electric power system distributes and has increased reactive loss and voltage drop, and the stability of system is also had certain influence.Common at home at present series reactor more application does not still have the example that is applied to limiting short-circuit current in the mesolow electrical network in the supergrid.
Adopt high-capacity and high-speed switch and reactor parallel way, for example the FSR device can be in parallel with common reactor.With the reactor short circuit, FSR disconnects fast during system short-circuit, and reactor is sealed in electrical network with limiting short-circuit current during normal the operation, thereby realizes zero impedance under the normal mode, and the fault that is short-circuited drops into the characteristic that reactor presents high impedance at the utmost point in the short time.But this device also exists inadequate natural endowment, the current-carrying pontic disconnects and relies on explosive blasting to finish in the FSR device, explosive is disposable, can't detect, exist behind the long-play because of the become damp and rotten consequence of explosion in time of explosive, and not reproducible use, and can only be used for the following electric pressure of 35kV.
Use novel short circuit current limiter, can realize that the normal mode lower device presents zero impedance or Low ESR, the fault that is short-circuited presents the characteristic of high impedance at the utmost point in the short time, still come with some shortcomings but have novel short-circuit fault current limiter now: 1, superconduct failure current limit (SFCL): be divided into resistor-type and inductance superconduct.Resistor-type at electric current just often, superconductor is in superconducting state does not have resistance.If the electric current increase has surpassed critical current, then superconductor withdraws from superconducting state, have high value resistor and connect with electrical network, thus limiting short-circuit current.Inductive type at electric current just often, the electric current degaussing of superconductor ring or make iron core be in the magnetic saturation state makes the operational mode of this FCL be Low ESR (being close to leakage reactance).When electric current increased above critical current, this superconductor ring entered high impedance status, thereby plays the effect of limiting short-circuit current.Superconductive current limiter exists Superconductor Physics material and mechanical performance to be limited to, manufacturing cost height, problems such as operating cost height.2, PTC thermistor short circuit current limiter: utilize PTC thermistor nonlinear resistance when normal current, resistance temperature hangs down and has the little characteristic of impedance, and temperature rises after short circuit current surpasses critical value, thereby the resistance value increase reaches the current limliting purpose.But exist recovery time long, shortcomings such as poor stability.3, existing solid-state version fault current limiter mainly contains: magnetic saturation type short circuit current limiter, direct current reactor type short circuit current limiter.The solid-state version fault current limiter has the advantage that action is fast, recovery time is short.But shortcomings such as there is complex structure in existing direct current reactor type short circuit current limiter, control is unreasonable, harmonic content big, poor reliability.Magnetic saturation type short circuit current limiter generally needs the D.C. magnetic biasing power supply, exists the cost height equally, problems such as poor reliability.
The utility model content
The utility model technical issues that need to address are for overcoming the deficiency of existing short-circuit fault current limiter, provide a kind of simple in structure, can realize automatic control, and fault current limiting fast and effeciently, reduce the steady-state current distortion, and can be applicable to the high power current limiter in high pressure, the supergrid.
For solving the problems of the technologies described above, technical solution adopted in the utility model is:
A kind of self-triggering DC reactor current limiter, comprise the rectifier circuit that constitutes by diode, be connected in parallel on the rectifier circuit direct current and export current limiting reactor between two ports, described current limiting reactor mainly comprises main winding, magnetic bias winding and iron core, the magnetic bias winding is connected with main winding, the two ends of a magnetic bias winding switch control circuit that is made of for solid-state switch and trigger equipment from triggering mode control mode in parallel.Self-triggering DC reactor current limiter is serially connected with between a certain phase power supply and load of system, constitutes single-phase self-triggering DC reactor current limiter.
A kind of concrete structure of the present utility model is: the single-phase rectifier bridge circuit of described rectifier circuit for being made up of four diodes constitutes single-phase self-triggering DC reactor current limiter.
When said structure of the present utility model is applied to single phase poaer supply, be directly single-phase self-triggering DC reactor current limiter to be connected between single phase poaer supply and the load; Self-triggering DC reactor current limiter is applied in the three-phase system, is to be serially connected with respectively between each phase power supply and load of three-phase system by three self-triggering DC reactor current limiters, constitutes the three-phase self-triggering DC reactor current limiter.
The another kind of said structure of the present utility model is used: self-triggering DC reactor current limiter is applied in high pressure or the supergrid system, it is the secondary that is connected in parallel on coupling transformer, be serially connected with between single phase poaer supply and the load, constitute the self-triggering DC reactor current limiter of single-phase zone coupling transformer; The self-triggering DC reactor current limiter of described single-phase zone coupling transformer, be applied in the three-phase system, self-triggering DC reactor current limiter by three single-phase zone coupling transformers is serially connected with respectively between each phase power supply of three-phase system and the load, constitutes the self-triggering DC reactor current limiter of three facies tract coupling transformers.
The another kind of concrete structure of the utility model is: the three-phase bridge rectification circuit of described rectifier circuit for being made up of eight diodes, the direct current of three-phase bridge rectification circuit is exported current limiting reactor in parallel between two ports, it is in parallel with current limiting reactor that the direct current of three-phase bridge rectification circuit is exported two ports, current limiting reactor comprises main winding, magnetic bias winding and iron core, the magnetic bias winding of reactor is connected with main winding, the two ends of magnetic bias winding switch control circuit that comprises solid-state switch and trigger equipment in parallel.Three-phase bridge rectification circuit is serially connected between three phase mains and the load, constitutes the three-phase self-triggering DC reactor current limiter.
The another kind of above-mentioned concrete structure is used and is: described self-triggering DC reactor current limiter is connected with the secondary of first coupling transformer, second coupling transformer, the 3rd coupling transformer, constitutes the three-phase self-triggering DC reactor current limiter of band coupling transformer.
Solid-state switch of the present utility model is further defined to: solid-state switch is the wherein a kind of of solid-state relay, thyristor or thyristor.
The improvement of magnetic bias winding described in the utility model is: described magnetic bias winding is one or more.
Operation principle of the present utility model is as follows:
The utility model adopts the rectifier circuit of being made up of power diode, and the load current of access to plant is carried out rectification.With reactor magnetic bias winding L
0Main winding L with reactor
1After the series connection, the direct current that is parallel to rectifier circuit is exported two ports.When system normally moves, system's alternating voltage makes the diode wheel conductance logical, makes load current embody direct current in device, and direct current flows through magnetic bias winding and main winding, magnetic direction does not change, so need not to increase dc excitation power, also can make that core of reactor is in saturation condition, thereby make reactor when normal operation, present Low ESR, increase electric network reactive-load loss, the loss of voltage hardly, and for system load, load current then still is presented as the electric current of alternation.When system is short-circuited fault, short circuit current rises rapidly, trigger equipment triggers solid-state switch automatically according to the variation of fault current and makes it conducting, magnetic bias short circuit in winding with reactor, the magnetic flux that the magnetic bias winding produces reduces, and by the demagnetization of short circuit loop, core of reactor withdraws from saturation condition immediately, the impedance of reactor is increased, thereby realize inhibitory action transient state fault current and stable state fault current.
Owing to adopted technique scheme, the obtained technological progress of the utility model is:
The design of the utility model magnetic bias current limiting reactor, make system when normal operation, need not DC power supply and make core of reactor be in degree of depth saturation condition, reduced influence, also greatly reduce the loss of system's reactive power and line voltage distribution simultaneously circuit; The solid-state switch control mode is from triggering mode, need not to provide in addition power supply and control lead-in wire, thereby makes more reliable, the safety of its operation; The design of solid-state switch, make the utility model increase of quick response system short-circuit current automatically, make current limiting reactor withdraw from saturation condition at short notice rapidly, change the impedance parameter of circuit, thereby effectively suppress the growth of short circuit current, its current limiting capacity significantly strengthens, when reducing short circuit to the impact of system; Device reliability strengthens, and reduces cost.Solid-state switch can be thyristor or other solid-state relays, after the trigger equipment triggering and conducting, and short circuit magnetic bias winding immediately; When solid-state switch is controllable silicon, can also realize that short trouble elimination back silicon controlled automatically shuts down, make current limiting reactor and network system recover normal operating conditions rapidly, current limiting reactor is connected with solid-state switch, the line current harmonic content is reduced, and then reducing distortion, the action of all right line of engagement way switch realizes the automatic reclosing function.The utility model makes that topological structure obtains simplifying, and need not in the loop to add dc excitation power in addition, has reduced the cost of flow restricter, has improved the reliability of operation of power networks.
During the utility model not only can be applied in, in the low voltage electric network, can also be applied in high-voltage fence, even in the supergrid system, further improve the security reliability of operation of power networks.The utility model can be provided with one or more magnetic bias winding, thereby realizes the accurate restriction to fault current, reduces the steady-state current distortion.
Description of drawings
Fig. 1: the utility model embodiment 1 electrical schematic diagram;
Fig. 2: the utility model embodiment 2 electrical schematic diagrams;
Fig. 3: the utility model embodiment 3 electrical schematic diagrams;
Fig. 4: the utility model embodiment 4 electrical schematic diagrams;
Fig. 5: the utility model embodiment 5 electrical schematic diagrams;
Fig. 6: the utility model embodiment 6 electrical schematic diagrams.
Embodiment
Embodiment 1
Figure 1 shows that a kind of electrical schematic diagram of self-triggering DC reactor current limiter, comprise by four power diode D
1, D
2, D
3, D
4The rectifier circuit of forming, it is in parallel with current limiting reactor that the direct current of rectifier circuit is exported two ports, and current limiting reactor is by main winding L
1, the magnetic bias winding L
0Constitute the magnetic bias winding L of reactor with iron core
0With main winding L
1Series connection, the magnetic bias winding L
1Two ends switch control circuit that constitutes by solid-state switch Kp and trigger equipment CF in parallel.AC is a system power supply, and SW is that circuit goes out wiretap, and RL is system load.
When system normally moves, the load current I in the loop
LBe not more than circuit maximum load current Ie.At the positive half cycle of load current, electric current ascent stage power diode D
1, D
4Forward conduction, power diode D
2, D
3Bearing back-pressure turn-offs; Electric current decline stage power diode D
1, D
4Bear back-pressure and turn-off power diode D
2, D
3The conducting afterflow; Solid-state switch K
PBe in off state, electric current flows through the main winding L of current limiting reactor
1With the magnetic bias winding L
0, the magnetic flux of inducting makes iron core enter saturation condition, and the iron core magnetic permeability remains at low levels, and makes reactor main winding L
1Less induction reactance is arranged, to reduce system reactive loss and the reduction of line end voltage when normally moving; In like manner, when the load current negative half period, core of reactor still is in the saturation region, and induction reactance is still less, can reach the purpose that reduces reactive loss and the reduction of line end voltage equally.
When system is short-circuited fault, load current I
LGreater than circuit maximum load current Ie, trigger equipment CF triggers solid-state switch Kp conducting automatically, magnetic bias coil L
0By short circuit, electric current flows through main winding L by solid-state switch Kp
1, and by the magnetic bias winding L
0Saturation condition is withdrawed from demagnetization, iron core rapidly, current limiting reactor main winding L
1Induction reactance increase rapidly, make the electric network impedance parameter change, short circuit current is limited in smaller value.
After the system failure is eliminated, the load current I of system
LBe not more than maximum load current Ie, solid-state switch Kp automatically shuts down under the effect of trigger equipment CF, the magnetic bias winding L
0Drop in the loop system restoration normal operating condition.
Embodiment 2
Fig. 2 is 2 one kinds of electrical schematic diagrams that are applied to the self-triggering DC reactor current limiter in the three-phase system of the utility model embodiment.This embodiment is by three single-phase self-triggering DC reactor current limiters, is serially connected in respectively between each the phase power supply of three-phase system and the load to constitute.The operation principle of its each phase as shown in the figure, and is identical with embodiment 1.
Embodiment 3
Fig. 3 is the electrical schematic diagram of the self-triggering DC reactor current limiter of 3 one kinds of single-phase zone coupling transformers of the utility model embodiment.Wherein TR is a coupling transformer, single-phase self-triggering DC reactor current limiter is connected in parallel on the secondary of coupling transformer, constitute the self-triggering DC reactor current limiter of single-phase zone coupling transformer, the operation principle from the trigger-type direct current reactor of single-phase zone coupling transformer is identical with embodiment 1.Be mainly used in high pressure or the extra high voltage system, high voltage is coupled to the low-voltage grade, thereby reduced rated voltage and other requirement of insulation level of each device in the circuit, reach the purpose of saving cost.
Embodiment 4
Fig. 4 is the electrical schematic diagram of the self-triggering DC reactor current limiter of 4 one kind of three facies tract coupling transformer of the utility model embodiment.Self-triggering DC reactor current limiter by three single-phase zone coupling transformers is applied in the three-phase system, is serially connected in respectively between each phase power supply and load of three-phase system.Its operation principle is identical with embodiment 3.
Embodiment 5
Fig. 5 is the electrical schematic diagram of another kind of self-triggering DC reactor current limiter.Comprise by eight diode D
1, D
2, D
3, D
4, D
5, D
6, D
7, D
8The three-phase bridge rectification circuit of forming, the direct current of three-phase bridge rectification circuit is exported two ports and is connected with current limiting reactor, and current limiting reactor is by main winding L
1, the magnetic bias winding L
0Constitute the magnetic bias winding L with iron core
0Main winding L with reactor
1Series connection, the magnetic bias winding L
0Two ends switch control circuit that constitutes by solid-state switch Kp and trigger equipment CF in parallel, three-phase bridge rectification circuit is serially connected between three phase mains and the load, constitutes the three-phase self-triggering DC reactor current limiter.
When system normally moves, diode D
1, D
3, D
5, D
7With diode D
2, D
4, D
6, D
8Be in the alternate conduction state, load current I
LBe not more than maximum load current Ie, solid-state switch Kp is in off state, the magnetic bias winding L
0Be connected on main winding L
1In the loop, its magnetic flux of inducting makes current limiting reactor operate in saturation condition, and circuit is not had the current limliting effect.When system broke down, the failed shorted electric current increased rapidly above circuit maximum load current Ie, and this moment is the diode D of a phase wherein
1, D
8Forward conduction, and diode D
2, D
7Oppositely end; Perhaps diode D
2, D
7Forward conduction, diode D
1, D
8Oppositely end, trigger equipment CF triggers solid-state switch Kp conducting, thus short circuit magnetic bias winding L
0, make current limiting reactor withdraw from saturation condition, induction reactance increases rapidly automatically, and then effectively suppresses the failed shorted electric current.Other two-phase operation principles are identical.
Embodiment 6
Fig. 6 is the electrical schematic diagram of the self-triggering DC reactor current limiter of 6 one kind of three facies tract coupling transformer of the utility model embodiment.The three-phase self-triggering DC reactor current limiter is in parallel with the secondary of three coupling transformers.Its operation principle is identical with embodiment 5.
Claims (6)
1. self-triggering DC reactor current limiter, comprise the rectifier circuit that constitutes by diode that is serially connected with between power supply and the load, be connected in parallel on the rectifier circuit direct current and export current limiting reactor between two ports that it is characterized in that: described current limiting reactor mainly comprises main winding (L
1), magnetic bias winding (L
0) and iron core, magnetic bias winding (L
0) and main winding (L
1) series connection, magnetic bias winding (L
0) one in parallel of two ends be the solid-state switch (Kp) from triggering mode and the switch control circuit of trigger equipment (CF) formation by control mode.
2. self-triggering DC reactor current limiter according to claim 1 is characterized in that: the single-phase rectifier bridge circuit of described rectifier circuit for being made up of four diodes constitutes single-phase self-triggering DC reactor current limiter.
3. self-triggering DC reactor current limiter according to claim 1, it is characterized in that: the three-phase bridge rectification circuit of described rectifier circuit for forming by eight diodes, the direct current of three-phase bridge rectification circuit is exported current limiting reactor in parallel between two ports, and current limiting reactor comprises main winding (L
1), magnetic bias winding (L
0) and iron core, magnetic bias winding (L
0) and main winding (L
1) series connection, magnetic bias winding (L
0) two ends switch control circuit that comprises solid-state switch (Kp) and trigger equipment (CF) in parallel.
4. according to each described self-triggering DC reactor current limiter of claim 1 to 3, it is characterized in that: described solid-state switch is the wherein a kind of of solid-state relay, thyristor or thyristor.
5. according to each described self-triggering DC reactor current limiter of claim 1 to 3, it is characterized in that: described magnetic bias winding is one or more.
6. according to claim 2 or 3 described self-triggering DC reactor current limiters, it is characterized in that: self-triggering DC reactor current limiter is in parallel with the secondary of coupling transformer on being connected high-tension line, is serially connected with between single phase poaer supply and the load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202547597U CN201549881U (en) | 2009-12-01 | 2009-12-01 | Self-triggered direct current reactor type current limiter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202547597U CN201549881U (en) | 2009-12-01 | 2009-12-01 | Self-triggered direct current reactor type current limiter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201549881U true CN201549881U (en) | 2010-08-11 |
Family
ID=42605062
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202547597U Expired - Fee Related CN201549881U (en) | 2009-12-01 | 2009-12-01 | Self-triggered direct current reactor type current limiter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201549881U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102611089A (en) * | 2012-03-29 | 2012-07-25 | 浙江大学 | Coupled mode solid-state current limiter of single-phase multi-winding transducer |
| CN103633632A (en) * | 2013-11-16 | 2014-03-12 | 中国科学院电工研究所 | Saturated bridge type short circuit fault current limiter |
| TWI722512B (en) * | 2018-08-06 | 2021-03-21 | 日商京三製作所股份有限公司 | Reactor |
-
2009
- 2009-12-01 CN CN2009202547597U patent/CN201549881U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102611089A (en) * | 2012-03-29 | 2012-07-25 | 浙江大学 | Coupled mode solid-state current limiter of single-phase multi-winding transducer |
| CN102611089B (en) * | 2012-03-29 | 2014-07-02 | 浙江大学 | Coupled mode solid-state current limiter of single-phase multi-winding transducer |
| CN103633632A (en) * | 2013-11-16 | 2014-03-12 | 中国科学院电工研究所 | Saturated bridge type short circuit fault current limiter |
| CN103633632B (en) * | 2013-11-16 | 2016-10-19 | 中国科学院电工研究所 | A kind of saturated bridge type short circuit fault current limiter |
| TWI722512B (en) * | 2018-08-06 | 2021-03-21 | 日商京三製作所股份有限公司 | Reactor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101707364A (en) | Self-triggering DC reactor current limiter and applications thereof | |
| EP2139088B1 (en) | Core-saturated superconductive fault current limiter and control method of the fault current limiter | |
| CN206498192U (en) | A kind of hybrid DC superconducting current limiter based on energy fast transfer | |
| WO2013163853A1 (en) | Reactor-type short circuit fault current limiter | |
| CN102723704B (en) | Magnetic switch type short-circuit current fault detection method and device for same | |
| CN101741076B (en) | YBCO high-temperature superconducting strip-based short circuit fault current limiter | |
| CN102684179B (en) | Hybrid short-circuit failure current limiter | |
| CN102790382A (en) | Current limited soft connecting/disconnecting device | |
| CN101609742A (en) | A kind of rapid-response controllable reactor of self-energy-taking | |
| CN106921150B (en) | A kind of hybrid DC superconducting current limiter based on energy fast transfer | |
| CN101710698A (en) | Permanent-magnetic AC reactor current restrictor | |
| CN102064542B (en) | Impedance composite superconducting fault current limiter based on novel superconducting material | |
| CN101789589A (en) | Mixed-type high-temperature superconducting short trouble current limiter | |
| CN201549881U (en) | Self-triggered direct current reactor type current limiter | |
| CN202840498U (en) | Novel magnetic-shielding air core transformer coupling bridge type solid-state current limiter | |
| CN202663104U (en) | Short-circuit current limit device | |
| CN100424957C (en) | Bias bridge type short circuit current limiter | |
| CN103475293A (en) | Iron core reactance regulator with current control and short-circuit current-limiting functions and control method thereof | |
| CN103633632A (en) | Saturated bridge type short circuit fault current limiter | |
| CN201556934U (en) | Permanent-magnetic alternating-current reactor-type current limiter | |
| WO2012092698A1 (en) | Device and method for limiting three-phase current | |
| CN100495854C (en) | Short-circuit fault current limiter | |
| CN203522599U (en) | Iron core reactance regulator having power flow control function and short circuit current limiting function | |
| CN102426896A (en) | Superconducting controlled reactor containing pulse width modulation (PWM) power control unit | |
| CN102664393B (en) | Short circuit current current-limiting apparatus |
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: 20100811 Termination date: 20131201 |