CN103986122B - Modularized current-limiting circuit breaker power module with additional diodes - Google Patents
Modularized current-limiting circuit breaker power module with additional diodes Download PDFInfo
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- CN103986122B CN103986122B CN201410201467.2A CN201410201467A CN103986122B CN 103986122 B CN103986122 B CN 103986122B CN 201410201467 A CN201410201467 A CN 201410201467A CN 103986122 B CN103986122 B CN 103986122B
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- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 6
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- 230000001629 suppression Effects 0.000 description 1
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Abstract
The invention provides a modularized current-limiting circuit breaker power module with additional diodes. The power module comprises a reactor or a power resistor and power sub-modules connected with the reactor or the power resistor in parallel; after an anti-parallel circuit 1 and an anti-parallel circuit 2 of the power sub-modules are connected in series, the anti-parallel circuit 1 and the anti-parallel circuit 2 are connected with a damping circuit and a lightning arrester which are connected in parallel; the anti-parallel circuit 1 and the anti-parallel circuit 2 respectively comprise a device capable of being switched off and the additional diode, wherein each device is provided with an anti-parallel diode, and each additional diode is connected with the corresponding device which can be switched off and provided with the anti-parallel diode, and the cathode of the additional diode of the anti-parallel circuit 1 is connected with the cathode of the additional diode of the anti-parallel circuit 2; the additional diodes are additional diodes selected from standard recovery diodes or silicon carbide diodes. The current-limiting circuit breaker power module reduces the active power loss caused when a modularized solid current limiter normally runs and the weight of the modularized solid current limiter, and the size and the cost are reduced.
Description
Technical field：
The present invention relates to a kind of short-circuit protection of power system, and in particular to a kind of modularity limit of additional diode
Stream chopper and its power model, belong to field of power.
Background technology：
With developing rapidly for electrical network, the interconnection between the successive input of the big power supply of load center, and big regional power grid,
Short circuit current is exceeded to be increasingly becoming one of distinct issues.
Short circuit current limiter (Short Circuit Current Limiter, SCCL) or fault current limiter
(Fault Current limiter, FCL) provides a kind of New methods in working to solve short circuit current excessive problem.
Short circuit current limiter (SCCL) or fault current limiter (FCL) realize that the mode of current limliting varies, pair event
It is very difficult that barrier current limiting technique carries out accurately classification.
From in terms of the level implemented, short-circuit current limiting measure can be divided into system-level measure and the big class of device level measure two.
From in terms of the method for operation, short circuit current current limiting measures are divided into passive type and active two big class.
Passive type short-circuit current limiting measure increases system impedance under normal operation with malfunction, constitutes simply,
It is easily achieved, but voltage drop can be produced under normal operating conditions, increases system loss.
Active short-circuit current limiting measure is lower quick increase system impedance of nonserviceabling, and has both limited failure electricity
Stream, and the normal operation of system is not affected, it is preferable fault current limiting device；From in terms of triggering mode, active short circuit electricity
Stream restriction is further divided into from trigger-type and external trigger formula, and power electronics type fault current limiter belongs to external trigger formula.
In system-level measure, electrical network parallel off operation and bus fanout operation be in China's electrical network Jing frequently with two kinds reduction
The measure of system short-circuit levels of current, and the reliability of limiting short-circuit current is very high, but the two measures belong to passive mode,
Stability, reliability and the motility of Operation of Electric Systems are reduced, often can not to the negative effect that system operation is brought
Ignore.
The national mains network for building higher voltage order one is the maximally efficient of raising operation of power networks reliability and stability
One of means, but Most current grid short circuit levels of current excessive problem can not be solved, and build that difficulty is big, the cycle is long,
Needs carry out research more extensively and profoundly, and short-term is difficult to solve the problems, such as that China's grid short circuit levels of current is universal exceeded.From
From the point of view of long-range angle, system-level measure be still solve short circuit current level excessive problem basic method, but to systems organization, be
The work of the aspects such as system operation increased increasing difficulty.
Mainly include in device level measure：High-impedance transformer, current-limiting reactor, transformer neutral point Jing low reactances connect
Ground, high impedance electromotor, high-tension fuse, Is- quick current-limiting devices, superconductive current limiter, temperature-sensitive (PTC) resistance, liquid metal limit
Flow device, the solid-state current limiter (Solid State Current Limiter, SSCL) based on power electronics, apply Electromagnetic Drive
Fault current limiter and combined type fault current limiter of principle etc..
Fault current limiter is one of important channel of short circuit current level excessive problem of solution system core point.From
From the point of view of the development course of recent decades, though current limiter principle is different, version is different, and species is various, and its is most basic
Operating characteristic is similar to, and is all that zero impedance or slight resistance are shown as when electrical network normally runs, and power consumption is close to zero；Send out in electrical network
It is rapid that high impedance is presented to reach the purposes such as suppression short circuit current during raw short trouble.
Have mass market application prospect in existing fault current limiter is using multiple identical power
Module-cascade, the power device that each power model is adopted is the turn-off device with anti-paralleled diode；Anti-paralleled diode
It is packaged together with turn-off device, when systematic steady state runs, line current flows through the turn-off device in each power model
And anti-paralleled diode, the steady-state loss for so having led to system is very big, and steady-state loss is fault current limit greatly
The maximum defect of device processed.
The content of the invention：
It is an object of the invention to provide a kind of modularity current limiting circuit breaker power model of additional diode is existing to overcome
There is the above-mentioned deficiency in the presence of technology.
The present invention provide technical scheme be：A kind of modularity current limiting circuit breaker power model of additional diode, it changes
Entering part is：
The power model includes that power model I, the power model I include the work(in parallel with reactor or power resistor
Rate submodule；The power modules include inverse parallel circuit 1, inverse parallel circuit 2, antihunt circuit and spark gap；It is described it is anti-simultaneously
It is in parallel with antihunt circuit in parallel and spark gap after connection circuit 1 and the inverse parallel circuit 2 series connection；
The inverse parallel circuit 1 and the inverse parallel circuit 2 include the turn-off device with anti-paralleled diode and with institute
The antiparallel additional diode of the turn-off device with anti-paralleled diode is stated, the additional diode of the inverse parallel circuit 1 is cloudy
Pole is connected with the additional diode negative electrode of the inverse parallel circuit 2；
The additional diode is that any one selected from standard recovery diode or silicon carbide diode adds two
Pole pipe.
Preferably, the turn-off device be from integrated gate commutated thyristor IGCT, gate level turn-off thyristor GTO,
Select in super gate level turn-off thyristor SGTO, IEGT IEGT or insulated gate bipolar transistor IGBT
Any one turn-off device.
Further, spark gap is from metal oxide arrester, metal oxide pressure-limiting device, silicon-carbide arrester or tubular type
Any one spark gap selected in spark gap.
Further, antihunt circuit is from RC antihunt circuits, RCD antihunt circuits, LRCD antihunt circuits or active damping circuit
In any one antihunt circuit for selecting.
Preferably, the inverse parallel circuit 1 includes one or more turn-off devices with anti-paralleled diode simultaneously
It is in parallel with one or more additional diodes after connection.
Further, inverse parallel circuit 2 is included after one or more parallel connections of turn-off device with anti-paralleled diode
It is in parallel with one or more additional diodes.
Further, the power model also includes power model II, and the power model II is by two or more work(
It is in parallel with reactor or power resistor after the series connection of rate submodule to be formed.
Preferably, two or more described power model I cascade successively to be formed current limiting circuit breaker, solid circuit breaker or
Fault current limiter.
Further, two or more described power model II cascade to form current limiting circuit breaker, solid circuit breaker successively
Or fault current limiter.
Further, one or more power models I and one or more power models II combination in any be successively
Cascade forms current limiting circuit breaker, solid circuit breaker or fault current limiter.
Compared with immediate technical scheme, the present invention has the advantages that：
1st, this power model realizes standardization and the Redundancy Design of whole current limiting circuit breaker, is conducive to whole current limliting open circuit
The reliability and interchangeability of device, so as to improve the availability of whole current limiting circuit breaker；
2nd, the steady-state loss of this power model is few, reduces the operating cost of fault current limiter or solid circuit breaker,
Improve reliability；
3rd, the steady-state loss of power model is reduced, and the heat dissipation capacity for reducing cooling system is required, so that cooling system
Weight declines, cost is reduced and volume-diminished, and the weight for making modular solid-state current limiter declines, cost reduction and volume-diminished,
It is more competitive.
Description of the drawings：
Fig. 1 is power modules schematic diagram；
Fig. 2 is the antihunt circuit schematic diagram of RCD；
Fig. 3 is the antihunt circuit schematic diagram of LRCD；
Fig. 4 is two additional diodes power modules schematic diagram in parallel with two IGCT with anti-paralleled diode；
Fig. 5 is two IGCT with anti-paralleled diode power modules schematic diagram in parallel with an additional diode；
Fig. 6 is the power model of parallel power resistance；
Fig. 7 is the power model of shunt reactor；
Fig. 8 is power model schematic diagram in parallel with reactor after two power modules series connection；
Fig. 9 is the cascade principle figure of power model.
Specific embodiment：
For a better understanding of the present invention, present disclosure is done further with reference to Figure of description and embodiment
Description：
The power modules schematic diagram of modularity current limiting circuit breaker power model is as shown in Figure 1：
Additional diode D1 adopted in Fig. 1 and D2 can be standard recovery diode (Standard Recovery
Diodes, SRD), or the better performances such as silicon carbide diode, and on-state voltage drop is than relatively low diode；
The turn-off device adopted in Fig. 1, but can be with super gate level turn-off thyristor SGTO for IGCT, and insulated gate is double
Bipolar transistor (Insulated Gate Bipolar Transistor, IGBT), integrated gate commutated thyristor
(Intergrated Gate Commutated Thyristors, IGCT), gate level turn-off thyristor (Gate Turn-Off
Thyristor, GTO) or IEGT (Injection Enhanced Gate Transistor, IEGT).
Spark gap, also known as overvoltage protection device, Surge Protector, surge protector, lightning protection device, voltage limiter etc., in Fig. 1
Spark gap is only used for limiting the overvoltage produced because of system operatio, is metal oxide arrester, metal oxide pressure-limiting device, carbon
Any one in SiClx spark gap, expulsion type arrester.
Antihunt circuit (Snubber Circuit), also known as buffer circuit or absorbing circuit.Its effect is to suppress power electronics
The endogenous cause of ill overvoltage of device, du/dt or overcurrent and di/dt, reduce the switching loss of device.The damping electricity adopted in Fig. 1
Road is succinct RC antihunt circuits；
Antihunt circuit in Fig. 1 may also be employed the antihunt circuit of the RCD in Fig. 2, the LRCD antihunt circuits in Fig. 3, or
Other antihunt circuit schemes, such as LC antihunt circuits and various active damping circuits etc..
Generally, the integrated anti-paralleled diode of the device such as SGTO, IGBT, IGCT belongs to fast recovery diode (Fast
Recovery Diode, FRD).FRD be it is a kind of with switching characteristic it is good, reverse recovery time is short the features such as the pole of quasiconductor two
Pipe, but corresponding on-state voltage drop will height.Additional diode SRD is a kind of low with high current disposal ability, on-state voltage drop
The semiconductor diode of feature, but SRD is optimized and designs for power frequency working condition, is not applied to high frequency or is needed fast
The operating mode of quick-recovery.
During normal operation, power modules current through line electric current as shown in Figure 1 or load current, due to adding two poles
On-state voltage drop of the on-state voltage drop of pipe SRD than FRD is low, therefore line current or load current flow through additional diode, i.e.,
SRD, then flow out this power modules after IGCT1 or IGCT2.Due to on-state voltage drop the leading to than FRD of additional diode SRD
State pressure drop is low, therefore, the steady-state loss of power modules will be substantially reduced.
During the system failure, Control protection system quickly recognizes fault-signal, order IGCT1 and IGCT2 shut-offs.Such as Fig. 1
It is shown：In turn off process, the voltage U at whole power modules two ends is born by IGCT1 or IGCT2M, diode is (including instead simultaneously
Di- pole pipe and additional diode) voltage drop need not be born；Because IGCT1 or IGCT2 undertake open-circuit line electric current or negative
Current-carrying responsibility, even if diode does not have fast restoration capabilities, nor affects on whole power modules and goes to cut-off line electricity
Stream or load current.
Therefore, additional standard recovery diode can reduce the steady-state loss of power model, while not affecting power model
Rapidly switching off during through-flow and failure when normal.
Appropriate resistance in parallel or the reactance (as is seen in fig. 6 or fig. 7) again of the power modules of additional standard recovery diode
Power model is formed, power model can be used as fault current limiter and use by (as shown in Figure 9) after cascade again, it is also possible to
Use as solid circuit breaker, more can use as current limiting circuit breaker.
In Fig. 1, tried as an example with the associate power electronic device product of ABB.Turn-off device is using ABB reverse-conductings
IGCT5SHZ19L6020.The off-state weight of the door pole stream-exchanging thyristor GCT (Gate Commutated Thyristors) in IGCT
Multiple crest voltage VDRM(Repetitive peak off-state voltage) is 5500V, maximum on-state average current IT(AV)M
(Max.average on-state current) is 840A.The maximum on-state average current I of the diode in IGCTF(AV)M
(Max.average on-state current) is 340A, threshold voltage V(F0)(Threshold voltage) is 2.7V, is led to
State slope resistance rF(Slope resistance) is 2.23m Ω.
Additional diode adopts ABB commutation diode 5SDD33L5500, maximum non-repetitive peak reverse voltage VRSM
(Max non-repetitive peak reverse voltage) is 5500V, on-state average current IF(AV)M(Average
On-state current) it is 3480A, threshold voltage VF0(Threshold voltage) is 0.94V, on-state slope resistance rF
(Slope resistance) is 0.147m Ω.
Obviously, the threshold voltage V of commutation diodeF0With on-state slope resistance rFFast quick-recovery inverse parallel that will be than IGCT
The threshold voltage V of diodeF0With on-state slope resistance rFIt is small, therefore, the steady-state loss of diode at least want little 50% with
On.
Another kind of power modules are given in Fig. 4, the power modules include two with anti-paralleled diode
IGCT and two additional diode parallel connection；It is of course also possible to use three or three IGCT with upper band anti-paralleled diode with
Three or more than three additional diodes parallel connections, to adapt to line current or load circuit than larger operating mode.
Give in Fig. 5 two anti-paralleled diodes IGCT it is in parallel after situation in parallel with an additional diode again,
It is of course also possible to for three or three IGCT with upper band anti-paralleled diode it is in parallel after again in parallel one or more add
The respective combination of diode.
The power model of parallel power resistance is given in Fig. 6.
The power model of shunt reactor is given in Fig. 7.
Give the power model of a reactor in parallel again after the series connection of two power modules in Fig. 8, it is also possible to root
According to design and engineering practical situation using three or the series connection of more than a three power modules reactor in parallel again scheme.
It is of course also possible to use the scheme of a power resistor in parallel again after the series connection of two or more power modules.
The power modules connected in Fig. 8 can be the power modules in Fig. 1；Can also be the power in Fig. 4 or Fig. 5
Submodule.
The cascade that power model is given in Fig. 9 is illustrated, the power model of series connection can be full Fig. 4, Fig. 5, Fig. 6, Fig. 7 or
The combination in any cascade of any one power model, or above-mentioned several power models in Fig. 8.
Embodiments of the invention are these are only, the present invention is not limited to, it is all in the spirit and principles in the present invention
Within, any modification, equivalent substitution and improvements done etc. should be included in applying for pending scope of the presently claimed invention
Within.
Claims (10)
1. the modularity current limiting circuit breaker power model of a kind of additional diode, it is characterised in that：
The power model include power model I, the power model I include reactor or power resistor and with the reactance
Device or power resistor power modules in parallel；The power modules include inverse parallel circuit 1, inverse parallel circuit 2, damping electricity
Road and spark gap；The inverse parallel circuit 1 and the inverse parallel circuit 2 series connection after with antihunt circuit and spark gap in parallel simultaneously
Connection；
The inverse parallel circuit 1 and the inverse parallel circuit 2 include the turn-off device with anti-paralleled diode and with the band
The antiparallel additional diode of turn-off device of anti-paralleled diode, the additional diode negative electrode of the inverse parallel circuit 1 with
The additional diode negative electrode connection of the inverse parallel circuit 2；
The additional diode is any one additional diode selected from standard recovery diode or silicon carbide diode.
2. the modularity current limiting circuit breaker power model of a kind of additional diode as claimed in claim 1, it is characterised in that：
The turn-off device is can to close from integrated gate commutated thyristor IGCT, gate level turn-off thyristor GTO, super gate pole
Any one selected in disconnected IGCT SGTO, IEGT IEGT or insulated gate bipolar transistor IGBT can be closed
Disconnected device.
3. the modularity current limiting circuit breaker power model of a kind of additional diode as claimed in claim 2, it is characterised in that：
Spark gap is to select from metal oxide arrester, metal oxide pressure-limiting device, silicon-carbide arrester or expulsion type arrester
Any one spark gap for going out.
4. the modularity current limiting circuit breaker power model of a kind of additional diode as claimed in claim 3, it is characterised in that：
Antihunt circuit is select from RC antihunt circuits, RCD antihunt circuits, LRCD antihunt circuits or active damping circuit any
A kind of antihunt circuit.
5. the modularity current limiting circuit breaker power model of a kind of additional diode as claimed in claim 1, it is characterised in that：
The inverse parallel circuit 1 include one or more with anti-paralleled diode turn-off devices parallel connection after with one or
More than one additional diode is in parallel.
6. the modularity current limiting circuit breaker power model of a kind of additional diode as claimed in claim 5, it is characterised in that：
Inverse parallel circuit 2 include one or more with anti-paralleled diode turn-off devices parallel connection after with one or one
Above additional diode is in parallel.
7. the modularity current limiting circuit breaker power model of a kind of additional diode as described in claim 1 or 5 or 6, its feature
It is：
The power model also includes that power model II, the power model II are connected by two or more power modules
It is in parallel with reactor or power resistor afterwards to be formed.
8. the modularity current limiting circuit breaker power model of a kind of additional diode as claimed in claim 1, it is characterised in that：
Two or more described power model I cascade to form current limiting circuit breaker, solid circuit breaker or fault current limit successively
Device processed.
9. the modularity current limiting circuit breaker power model of a kind of additional diode as claimed in claim 7, it is characterised in that：
Two or more described power model II cascade to form current limiting circuit breaker, solid circuit breaker or fault current limit successively
Device processed.
10. the modularity current limiting circuit breaker power model of a kind of additional diode as claimed in claim 7, it is characterised in that：
One or more power models I and one or more power models II combination in any cascade to form current limliting successively
Chopper, solid circuit breaker or fault current limiter.
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| CN201410201467.2A CN103986122B (en) | 2014-05-14 | 2014-05-14 | Modularized current-limiting circuit breaker power module with additional diodes |
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| CN201410201467.2A CN103986122B (en) | 2014-05-14 | 2014-05-14 | Modularized current-limiting circuit breaker power module with additional diodes |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104143775B (en) * | 2014-08-18 | 2016-04-20 | 国家电网公司 | A kind of power electronic transformer substation |
| CN104779593B (en) * | 2015-04-22 | 2017-10-20 | 中国船舶重工集团公司第七一二研究所 | A kind of DC solid circuit breaker and its control method |
| CN106385163A (en) * | 2015-07-21 | 2017-02-08 | 特变电工新疆新能源股份有限公司 | Phase power unit based on asymmetric IGCT and H bridge chain link structure |
| KR101802509B1 (en) * | 2015-12-14 | 2017-11-28 | 전북대학교산학협력단 | Cascaded Half Bridge Solid State Circuit Breaker |
| CN110289604A (en) * | 2019-06-20 | 2019-09-27 | 山东泰开高压开关有限公司 | A kind of air-cooled all solid state dc circuit breaker |
| CN110323720A (en) * | 2019-08-05 | 2019-10-11 | 珠海格力电器股份有限公司 | IGBT module protective device, IGBT module and frequency converter |
| CN114629098B (en) * | 2022-02-23 | 2022-11-11 | 中国科学院电工研究所 | Solid-state switch based on sectional type gapless lightning arrester and utilization rate improving method thereof |
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|---|---|---|---|---|
| CN102496919A (en) * | 2011-11-24 | 2012-06-13 | 华北电力大学 | Load unbalance compensation current limiter |
| CN103280763A (en) * | 2013-02-27 | 2013-09-04 | 国网智能电网研究院 | Direct current circuit breaker and realization method thereof |
| CN103474983A (en) * | 2013-08-20 | 2013-12-25 | 国家电网公司 | High voltage and great current direct-current circuit breaker and control method thereof |
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2014
- 2014-05-14 CN CN201410201467.2A patent/CN103986122B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102496919A (en) * | 2011-11-24 | 2012-06-13 | 华北电力大学 | Load unbalance compensation current limiter |
| CN103280763A (en) * | 2013-02-27 | 2013-09-04 | 国网智能电网研究院 | Direct current circuit breaker and realization method thereof |
| CN103474983A (en) * | 2013-08-20 | 2013-12-25 | 国家电网公司 | High voltage and great current direct-current circuit breaker and control method thereof |
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