CN205595772U - Series resonance zero loss current limiting device - Google Patents
Series resonance zero loss current limiting device Download PDFInfo
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- CN205595772U CN205595772U CN201620336671.XU CN201620336671U CN205595772U CN 205595772 U CN205595772 U CN 205595772U CN 201620336671 U CN201620336671 U CN 201620336671U CN 205595772 U CN205595772 U CN 205595772U
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- limiting reactor
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- 239000003990 capacitor Substances 0.000 claims abstract description 58
- 238000013016 damping Methods 0.000 claims abstract description 5
- 230000002457 bidirectional effect Effects 0.000 claims description 12
- 230000008033 biological extinction Effects 0.000 claims description 2
- 230000001771 impaired effect Effects 0.000 abstract 1
- 230000005540 biological transmission Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
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Abstract
The utility model relates to a series resonance zero loss current limiting device, including installing the current limiting reactor in the switch board, with current limiting reactor establish ties mutually, be used for and current limiting reactor constitution series resonance's resonant capacitor, with resonant capacitor connects, is used for to release the damping protection system that discharges of its electric energy mutually in parallel, with resonant capacitor is connected, is used for to protect the not impaired intelligence protection control system of resonant capacitor. The utility model discloses simple structure, convenient to use, safe and reliable can effectively limit short -circuit current's intensity, reduce short -circuit current greatly to electrical equipment's impact, when guaranteeing user side voltage, can realize current limiting reactor's zero loss again.
Description
Technical field
This utility model relates to electric power system power distribution equipment current limiting technique field, is specifically related to a kind of series resonance zero and current-limiting apparatus is lost.
Background technology
Along with expanding economy and the sharp increase of electric load, the increase of net capacity, the short circuit current constantly increased is increasing to the impact of power system electrical equipment；Meanwhile, the connecting-disconnecting function of existing chopper is difficult to meet cut-off huge short circuit current.Therefore for solving this great difficult problem, the mode that current-limiting reactor is concatenated in loop is widely used in power system electrical power trans mission/distribution system.Though current-limiting reactor series connection in the loop can limiting short-circuit current intensity, reduce short circuit current to the impact of electrical equipment in power system, and maintain busbar voltage, it is to avoid the further expansion of short trouble.But series connection current-limiting reactor has a lot of weak point, first, produces the financial burden that huge reactive loss also cause the user is the biggest in current-limiting reactor series loop；Secondly, when choosing the reactance value of current-limiting reactor, after often there is the requirement meeting limiting short-circuit current, the contradiction of user side brownout under rated current.During the long distance delivery of power system transmission and distribution network, transmission line of electricity also can produce induction reactance, the most it is equal to the reactor defined in a kind of stealth, potential concatenation user load loop, has caused user side voltage to reduce equally, have again bigger reactive loss simultaneously.
Utility model content
The purpose of this utility model is to provide a kind of series resonance zero that current-limiting apparatus is lost, can the intensity of effective limiting short-circuit current, it is greatly reduced the short circuit current impact to electrical equipment, while ensureing user side voltage, zero loss of current-limiting reactor can be realized again.
For achieving the above object; this utility model have employed techniques below scheme: includes the current-limiting reactor being arranged in power distribution cabinet; it is in series with described current-limiting reactor, for constituting the resonant capacitor of series resonance with described current-limiting reactor; be in parallel with described resonant capacitor, for discharge its electric energy electric discharge damp protection system, be connected with described resonant capacitor, for the intelligent protection control system protecting resonant capacitor to be not damaged by.
Described electric discharge damping protection system includes current limliting antivibrator and znr; the input of described current limliting antivibrator is connected with the end of incoming cables of described resonant capacitor, and its outfan is connected with the leading-out terminal of described resonant capacitor by znr.
Described intelligent protection system includes the high-speed eddy switch being connected in parallel on resonant capacitor two ends, and described high-speed eddy switch controls it by the controller being arranged in power distribution cabinet and cut-offs.
Described intelligent protection system also includes that bidirectional triode thyristor, described bidirectional triode thyristor are connected in parallel on the two ends of resonant capacitor.
Described current limliting antivibrator is in parallel is formed by inductance L and resistance R.
Described high-speed eddy switch is vacuum extinction formula chopper.
As shown from the above technical solution, this utility model simple in construction, esy to use, safe and reliable, the biggest beneficial effect is had relative to concatenation current-limiting reactor the most in the loop, one, in load circuit, the current-limiting reactor of concatenation is in series with this resonant capacitor so that under normal power supply running status, no matter loads and how to change, for power frequency, current-limiting reactor constitutes series resonance with resonant capacitor, makes user's load terminal voltage equal to busbar voltage.They are two years old, current-limiting reactor and resonant capacitor constitute series resonance, make the reactive loss of current-limiting reactor consumption be provided by resonant capacitor completely, will not any financial burden of cause the user, under realizing specified running status, it is achieved the economic aim of current-limiting reactor zero loss.Its three, when power system is short-circuited fault, controller judges short trouble by fast algorithm, sending combined floodgate order to high-speed eddy switch immediately, and high-speed eddy switch can close a floodgate rapidly within 2 milliseconds, quickly puts into current-limiting reactor limiting short-circuit current；Bidirectional triode thyristor at resonant capacitor two ends detects that resonant capacitor both end voltage exceedes resonant capacitor normal operating voltage the most in parallel, bidirectional triode thyristor turns within 200 microseconds, thus short circuit resonant capacitor, quickly put into current-limiting reactor limiting short-circuit current.The duplicate protection realized resonant capacitor is switched by bidirectional triode thyristor and high-speed eddy; while avoiding resonant capacitance because of excessive pressure damages; guarantee that current-limiting reactor can the intensity of effective limiting short-circuit current; reduce short circuit current to the impact of electrical equipment in power system; and maintenance busbar voltage, it is to avoid the further expansion of short trouble.Its four, electric energy when discharge prevention system big electric current occurs for circuit, after resonant capacitor is shorted, in release resonant capacitor, it is ensured that resonant capacitor can permanently effective safe operation.
Accompanying drawing explanation
Fig. 1 is electrical schematic diagram of the present utility model.
Detailed description of the invention
Below in conjunction with the accompanying drawings this utility model is described further:
As shown in Figure 1; the series resonance zero of the present embodiment is lost current-limiting apparatus; including the current-limiting reactor 1 being arranged in power distribution cabinet; it is in series with current-limiting reactor 1, for constituting the resonant capacitor 3 of series resonance with current-limiting reactor 1; be in parallel with resonant capacitor 3, for discharge its electric energy electric discharge damp protection system, be connected with resonant capacitor 3, for the intelligent protection control system protecting resonant capacitor 3 to be not damaged by.
Electric discharge damping protection system includes current limliting antivibrator 6 and znr 4, and the input of current limliting antivibrator 6 is connected with the end of incoming cables of resonant capacitor 3, and its outfan is connected with the leading-out terminal of resonant capacitor 3 by znr 4.In the present embodiment, current limliting antivibrator 6 is in parallel is formed by inductance L and resistance R.This current limliting antivibrator 6, is used for limiting electric energy release dash current after the protection of resonant capacitor 3 short circuit, prevents resonant capacitor 3 from damaging owing to crossing stream.This znr 4; can be after resonant capacitor short circuit be protected; absorb rapidly the electric energy of resonant capacitor release, it is ensured that the terminal voltage of resonant capacitor 3 is controlled in load rated safety range of operation, it is ensured that the safe operation that resonant capacitor 3 can be permanently effective.So resonant capacitor 3 both end voltage can be limited in a relatively low level, so capacity of resonant capacitor 3 can reduce greatly, its cost can be greatly reduced naturally, the volume of equipment has obtained effective control simultaneously, complete equipment cost can be greatly reduced, make current-limiting reactor 1 can be widely used in power system.
Intelligent protection system includes the high-speed eddy switch 5 being connected in parallel on resonant capacitor 3 two ends, and high-speed eddy switch 5 controls it by the controller being arranged in power distribution cabinet and cut-offs.When outlet short trouble in circuit, controller controls high-speed eddy switch immediately and closes a floodgate, thus is preventing resonant capacitor 3 from damaging because of overvoltage, ensures the intensity of limiting short-circuit current in the concatenation loop that current-limiting reactor 1 can be sufficiently fast simultaneously.This example high speed eddy current switch drives for eddy current, vacuum interrupter arc extinguishing chopper.
For the safety of the raising resonant capacitor that improves and the intensity of the short circuit current of limiting circuit fault, in the present embodiment, intelligent protection control system also includes bidirectional triode thyristor 2, and this bidirectional triode thyristor 2 is connected in parallel on resonant capacitor 3 two ends.
Operation principle is as follows: when be short-circuited fault time, the terminal voltage of resonant capacitor 3 exceed can two-way control silicon 2 conducting voltage time, this bidirectional triode thyristor 2 turns on immediately, thus resonant capacitor 3 short circuit, prevent resonant capacitor 3 from damaging because of overvoltage, ensure the intensity of limiting short-circuit current in the concatenation loop that current-limiting reactor 1 can be sufficiently fast simultaneously；After resonant capacitor 3 is protected, resonant capacitor 3 is discharged by electric discharge damping protection system immediately, the electric energy in release resonant capacitor 3；When the electric current that bidirectional triode thyristor 2 passes through is less than freewheel current, bidirectional triode thyristor 2 disconnects immediately, now high-speed eddy switch 5 combined floodgate, and this resonant capacitor 3 is by high-speed eddy switch protection；After short trouble excises, when line current returns normal value, controller sends separating brake order, high-speed eddy switchs 5 separating brakes, make resonant capacitor 3 put into circuit to run, constitute series resonance with current-limiting reactor 1, while both ensureing user side voltage, zero loss of current-limiting reactor 1 can be realized again.
Embodiment described above is only to be described preferred implementation of the present utility model; not scope of the present utility model is defined; on the premise of without departing from this utility model design spirit; various deformation that the technical solution of the utility model is made by those of ordinary skill in the art and improvement, all should fall in the protection domain that this utility model claims determine.
Claims (6)
1. a series resonance zero is lost current-limiting apparatus; it is characterized in that: include the current-limiting reactor (1) being arranged in power distribution cabinet; it is in series with described current-limiting reactor (1), for constituting the resonant capacitor (3) of series resonance with described current-limiting reactor (1); be in parallel with described resonant capacitor (3), for discharge its electric energy electric discharge damp protection system, be connected with described resonant capacitor (3), for the intelligent protection control system protecting resonant capacitor (3) to be not damaged by.
Series resonance zero the most according to claim 1 is lost current-limiting apparatus; it is characterized in that: described electric discharge damping protection system includes current limliting antivibrator (6) and znr (4); the input of described current limliting antivibrator (6) is connected with the end of incoming cables of described resonant capacitor (3), and its outfan is connected with the leading-out terminal of described resonant capacitor (3) by znr (4).
Series resonance zero the most according to claim 1 is lost current-limiting apparatus; it is characterized in that: described intelligent protection system includes being connected in parallel on high-speed eddy switch (5) at resonant capacitor (3) two ends, described high-speed eddy switch (5) controls it by the controller being arranged in power distribution cabinet and cut-offs.
Series resonance zero the most according to claim 1 is lost current-limiting apparatus, it is characterised in that: described intelligent protection system also includes that bidirectional triode thyristor (2), described bidirectional triode thyristor (2) are connected in parallel on the two ends of resonant capacitor (3).
Series resonance zero the most according to claim 2 is lost current-limiting apparatus, it is characterised in that: described current limliting antivibrator (6) is in parallel is formed by inductance L and resistance R.
Series resonance zero the most according to claim 3 is lost current-limiting apparatus, it is characterised in that: described high-speed eddy switch (5) is vacuum extinction formula chopper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620336671.XU CN205595772U (en) | 2016-04-20 | 2016-04-20 | Series resonance zero loss current limiting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620336671.XU CN205595772U (en) | 2016-04-20 | 2016-04-20 | Series resonance zero loss current limiting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205595772U true CN205595772U (en) | 2016-09-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620336671.XU Expired - Fee Related CN205595772U (en) | 2016-04-20 | 2016-04-20 | Series resonance zero loss current limiting device |
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| CN (1) | CN205595772U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106786442A (en) * | 2016-12-30 | 2017-05-31 | 安徽徽电科技股份有限公司 | A kind of LC series resonances current-limiting apparatus |
| CN106786434A (en) * | 2016-11-16 | 2017-05-31 | 合肥普望电子有限责任公司 | A kind of superconductive failure current limiter |
-
2016
- 2016-04-20 CN CN201620336671.XU patent/CN205595772U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106786434A (en) * | 2016-11-16 | 2017-05-31 | 合肥普望电子有限责任公司 | A kind of superconductive failure current limiter |
| CN106786442A (en) * | 2016-12-30 | 2017-05-31 | 安徽徽电科技股份有限公司 | A kind of LC series resonances current-limiting apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211009 Address after: 230088 No. 26, Hehuan Road, high tech Zone, Hefei, Anhui Patentee after: ANHUI HUIDIAN TECHNOLOGY Co.,Ltd. Address before: 230088 No. 26, Hehuan Road, high tech Zone, Hefei, Anhui Patentee before: ANHUI SHANGTU ELECTRIC POWER PROTECTIVE APPARATUS Co.,Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160921 |