CN205178490U - Novel solid -state fault current limiter of bridge type - Google Patents
Novel solid -state fault current limiter of bridge type Download PDFInfo
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- CN205178490U CN205178490U CN201520967402.9U CN201520967402U CN205178490U CN 205178490 U CN205178490 U CN 205178490U CN 201520967402 U CN201520967402 U CN 201520967402U CN 205178490 U CN205178490 U CN 205178490U
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- 238000010586 diagram Methods 0.000 description 6
- 239000003990 capacitor Substances 0.000 description 3
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- 230000005611 electricity Effects 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
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Abstract
The utility model relates to a novel solid -state fault current limiter of bridge type, this solid state fault current limiter includes single phase rectification bridge unit, current -limiting unit and the unit that opens circuit, wherein, the current -limiting unit connection constitutes single -phase fault current limiter in the both sides of single phase rectification bridge, and the unit that opens circuit is parallelly connected with single -phase fault current limiter, the utility model discloses when short -circuit fault appears in electric power system, can be automatically quick access system, first peak value of effectual restriction short -circuit current plays the metering function, has reduced the requirement to the failure recognition simultaneously, and at the normal during operation of electric power system, has not had the influence to the electric power system trend, and overall structure is simple moreover, and is with low costs.
Description
Technical field
The utility model relates to a kind of fault current limiter, specifically relates to the solid-state fault current limiter of a kind of Novel bridge type.
Background technology
Due to developing rapidly of electric power system, the load density in generator single-machine capacity, station capacity, substation capacity, city and the center of industry continues to increase, interconnected heighten degree between system, result in grid short circuit levels of current at different levels increases this new problem.The input of load center large power supply accelerates the growth of short-circuit current level further, and in system, the short circuit current of some areas has has met or exceeded circuit breaker interrupting capacity, and ascendant trend is more and more faster, and serious threat is to the safe operation of electric power system.
At present, domestic and international limiting short-circuit current is divided into system-level measure and Unit Level measure.System-level measure angularly suppresses short circuit current level from grid structure, operational mode, but it changes electric network composition and operational mode, often sacrifices the fail safe of electrical network, reliability and economy; The measure of Unit Level mainly contains: high-impedance transformer, series reactor, high impedance generator and fault current limiter (FaultCurrentLimiter, FCL) etc.Wherein, fault current limiter not have an impact on system cloud gray model when a kind of system is normally run or to affect very little, rapidly by the active current-limiting apparatus of fault current limitation within zone of reasonableness, can have wide investigation and application prospect again during fault.
For fault current limiter, lot of domestic and international university, scientific research institution and scientific & technical corporation are proposed multiple different structure.Currently available technology mainly contains current limiting reactor, high-voltage and current-limitation fuse, mode of resonance fault current limiter, series compensation device (having current-limiting function concurrently) etc., if application number is " 201420805025.4 ", name is called the utility model patent of " a kind of series resonant-type fault current limiter ", a kind of series resonant-type fault current limiter is provided, comprises reactor L, Capacitor banks C, metal oxide arrester MOV, Triggered Vacuum Switch TVS, Quick side way switch K, the first circuits for triggering, the second circuits for triggering and trigger controller; Connect with reactor L after metal oxide arrester MOV in parallel, Triggered Vacuum Switch TVS and Quick side way switch K successively in Capacitor banks C two ends; Triggered Vacuum Switch TVS is connected with the first circuits for triggering, and Quick side way switch K is connected with the second circuits for triggering, and trigger controller comprises the input be connected with Capacitor banks C and the output be connected with the second circuits for triggering with the first circuits for triggering respectively.Although this patent application significantly reduces structure, the volume and weight of flow restricter, shorten the making time of current limiting reactor, when electric power system is broken down, still automatically can not play metering function by fast speed access systems.
Utility model content
In order to solve above-mentioned deficiency existing in prior art, the utility model provides a kind of Novel bridge type solid-state fault current limiter.
The solid-state fault current limiter of a kind of Novel bridge type that the utility model provides, comprises single-phase rectification bridge unit, flow-restriction and breaking units; Its improvements are, described single-phase rectification bridge unit comprises thyristor valve T and diode D;
Described flow-restriction two ends are connected with single-phase rectification bridge unit, wherein one end is between the negative electrode and the negative electrode of diode D1 of the thyristor valve T1 of single-phase rectification bridge unit, the other end is between the anode and the anode of diode D2 of the thyristor T4 of single-phase rectification bridge unit, Unit two form single-phase fault demand limiter jointly, and described breaking units is in parallel with described single-phase fault demand limiter.
Preferably, described single-phase rectification bridge unit comprises thyristor valve T1, T2, T3, T4 and diode D1, D2;
The negative electrode of described thyristor valve T1 is connected with the negative electrode of described diode D1, the anode of described diode D1 is connected with the negative electrode of described thyristor valve T4, the anode of described thyristor T4 is connected with the anode of described diode D2, and the negative electrode of described diode D2 is connected with the anode of described thyristor T1;
Described diode D1, D2 two ends are thyristor valve T2 and T3 described in reverse parallel connection respectively.
Preferably, described flow-restriction comprises current limiting reactor L.
Preferably, described breaking units comprises bypass breaker K.
Preferably, described breaking units is connected with single-phase fault demand limiter by transformer;
Described breaking units and described transformers connected in parallel; Described transformer is in parallel with single-phase fault demand limiter.
Compared with prior art, excellent beneficial effect is the utility model:
1) when electric power system normally works, on electric power system tide substantially without impact.
2), after short trouble appears in electric power system, automatically can play metering function by fast speed access systems, reduce the requirement to Fault Identification.
3) can the first peak value of limiting short-circuit current; Avoid adopting complicated full control device, reliability is high; Overall structure is simple, and cost is low.
4) the reverse parallel connection structure of thyristor valve T2 and T3 and diode D1 and D2, when electric power system fault, current limiting reactor L can connect connecting system by this structure completely, avoids traditional bridge circuit to need the problem of the current limliting branch road outside plus.
Accompanying drawing explanation
Fig. 1 is prior art schematic diagram;
The solid-state fault current limiter circuit theory diagrams of Novel bridge type that Fig. 2 provides for the utility model;
Fig. 3 is the circuit theory diagrams that the utility model is applied to the solid-state fault current limiter of Novel bridge type of high pressure or extra-high voltage Force system;
Embodiment
In order to understand the utility model better, below in conjunction with Figure of description and example, content of the present utility model is described further.
The solid-state fault current limiter of a kind of Novel bridge type, when it is applied to the non-high-tension electricity system failure, as shown in Figure 2, this fault current limiter is made up of single-phase rectification bridge unit, flow-restriction and breaking units circuit theory diagrams; Single-phase rectification bridge unit comprises thyristor valve T and diode D;
Flow-restriction two ends are connected with single-phase rectification bridge unit, wherein one end is between the negative electrode and the negative electrode of diode D1 of the thyristor valve T1 of single-phase rectification bridge unit, the other end is between the anode and the anode of diode D2 of the thyristor T4 of single-phase rectification bridge unit, Unit two form single-phase fault demand limiter jointly, and described breaking units is in parallel with described single-phase fault demand limiter.
Single-phase rectification bridge unit is specifically made up of thyristor valve T1, T2, T3, T4 and diode D1, D2, and the concrete annexation of these single-phase rectification bridge unit components and parts is:
The negative electrode of thyristor valve T1 is connected with the negative electrode of diode D1, and the anode of diode D1 is connected with the negative electrode of thyristor valve T4, and the anode of thyristor T4 is connected with the anode of diode D2, and the negative electrode of diode D2 is connected with the anode of thyristor T1;
Thyristor valve T2 and T3 of diode D1, D2 two ends respectively described in reverse parallel connection.Flow-restriction comprises current limiting reactor L.Breaking units comprises bypass breaker K.
When the solid-state fault current limiter of this Novel bridge type is applied to high pressure and the ultrahigh voltage power system failure, its circuit theory diagrams as shown in Figure 3, its improvements being applied to the circuit theory diagrams of the non-high-tension electricity system failure compared to Fig. 2 are, breaking units is connected with single-phase fault demand limiter by transformer, bypass breaker K and transformers connected in parallel, transformer and the parallel connection of single-phase fault demand limiter, in high pressure or extra-high voltage Force system, employing step-down transformer is coupled, in order to reduce the voltage definite value of power electronic device in fault current limiter, thus reduce flow restricter cost.
These are only embodiment of the present utility model, be not limited to the utility model, all within spirit of the present utility model and principle, any amendment made, equivalent replacements, improvement etc., be all included within right of the present utility model that application awaits the reply.
Claims (5)
1. the solid-state fault current limiter of Novel bridge type, is characterized in that, described solid-state fault current limiter comprises single-phase rectification bridge unit, flow-restriction and breaking units;
Described single-phase rectification bridge unit comprises thyristor valve T and diode D;
The two ends of described flow-restriction are connected to single-phase rectification bridge unit two ends, between the negative electrode of the thyristor valve T1 in single-phase rectification bridge unit of one end wherein and the negative electrode of diode D1, between the anode of other end thyristor valve T4 in single-phase rectification bridge unit and the anode of diode D2, Unit two form single-phase fault demand limiter jointly;
Described breaking units is in parallel with described single-phase fault demand limiter.
2. the solid-state fault current limiter of Novel bridge type as claimed in claim 1, it is characterized in that, described single-phase rectification bridge unit comprises thyristor valve T1, T2, T3, T4 and diode D1, D2;
The negative electrode of described thyristor valve T1 is connected with the negative electrode of described diode D1, the anode of described diode D1 is connected with the negative electrode of described thyristor valve T4, the anode of described thyristor T4 is connected with the anode of described diode D2, and the negative electrode of described diode D2 is connected with the anode of described thyristor T1;
Described diode D1, D2 two ends are thyristor valve T2 and T3 described in reverse parallel connection respectively.
3. the solid-state fault current limiter of Novel bridge type as claimed in claim 1, it is characterized in that, described flow-restriction comprises current limiting reactor L.
4. the solid-state fault current limiter of Novel bridge type as claimed in claim 1, it is characterized in that, described breaking units comprises bypass breaker K.
5. the solid-state fault current limiter of Novel bridge type as claimed in claim 1, it is characterized in that, described breaking units is connected with single-phase fault demand limiter by transformer;
Described breaking units and described transformers connected in parallel; Described transformer is in parallel with single-phase fault demand limiter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520967402.9U CN205178490U (en) | 2015-11-27 | 2015-11-27 | Novel solid -state fault current limiter of bridge type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520967402.9U CN205178490U (en) | 2015-11-27 | 2015-11-27 | Novel solid -state fault current limiter of bridge type |
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| CN205178490U true CN205178490U (en) | 2016-04-20 |
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| CN201520967402.9U Expired - Fee Related CN205178490U (en) | 2015-11-27 | 2015-11-27 | Novel solid -state fault current limiter of bridge type |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105356434A (en) * | 2015-11-27 | 2016-02-24 | 中电普瑞科技有限公司 | Novel bridge type solid-state fault current limiter and using method thereof |
| CN107769181A (en) * | 2016-08-23 | 2018-03-06 | 全球能源互联网研究院 | A kind of bridge-type current limiter based on pulse transformer |
-
2015
- 2015-11-27 CN CN201520967402.9U patent/CN205178490U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105356434A (en) * | 2015-11-27 | 2016-02-24 | 中电普瑞科技有限公司 | Novel bridge type solid-state fault current limiter and using method thereof |
| CN105356434B (en) * | 2015-11-27 | 2019-03-22 | 中电普瑞科技有限公司 | A kind of novel bridge type solid-state fault current limiter and its application method |
| CN107769181A (en) * | 2016-08-23 | 2018-03-06 | 全球能源互联网研究院 | A kind of bridge-type current limiter based on pulse transformer |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| 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: 20160420 Termination date: 20191127 |