CN103986122A - 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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- CN103986122A CN103986122A CN201410201467.2A CN201410201467A CN103986122A CN 103986122 A CN103986122 A CN 103986122A CN 201410201467 A CN201410201467 A CN 201410201467A CN 103986122 A CN103986122 A CN 103986122A
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Abstract
The invention provides a modularized current-limiting circuit breaker power module with additional diodes. The power module comprises power sub-modules connected with a reactor or a 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 electric power system, be specifically related to a kind of modularization current limiting circuit breaker and power model thereof of additional diode, belong to field of power.
Background technology:
Along with developing rapidly of electrical network, the input in succession of load center large power supply, and interconnected between large regional power grid, short circuit current exceeds standard becomes one of distinct issues gradually.
Short circuit current limiter (Short Circuit Current Limiter, SCCL) or fault current limiter (Fault Current limiter, FCL) provide a kind of New methods in working for solving the short circuit current problem of exceeding standard.
The mode that short circuit current limiter (SCCL) or fault current limiter (FCL) are realized current limliting varies, and failure current limit technology is classified accurately very difficult.
From the level of implementing, short-circuit current limiting measure can be divided into system-level measure and the large class of device level measure two.From operational mode, short circuit current current limiting measures are divided into passive type and active two large classes.
Passive type short-circuit current limiting measure, under normal operation and malfunction, all increases system impedance, forms simply, is easy to realize, but can produces voltage drop under normal operating condition, increases system loss.
The active short-circuit current limiting measure lower quick increase system impedance of just nonserviceabling, had both limited fault current, did not affect again the normal operation of system, was desirable fault current limitation equipment; From triggering mode, active short-circuit current limiting measure 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, the operation of electrical network parallel off and bus fanout operation are the often measures of two kinds of employing reduction system short-circuit levels of current in China's electrical network, and the reliability of limiting short-circuit current is very high, but these two measures all belong to passive mode, reduce stability, reliability and the flexibility of power system operation, moved the negative effect bringing to system often very important.
The national trunk electrical network of building a higher step voltage is the most effectively one of the means that improve operation of power networks reliability and stability, but can not solve current most grid short circuit levels of current problem that exceeds standard, and it is large to build difficulty, cycle is long, need to carry out research more extensively and profoundly, short-term is difficult to solve the problem that China's grid short circuit levels of current generally exceeds standard.In the long run/term, system-level measure is still and solves the exceed standard basic way of problem of short circuit current level, but has increased increasing difficulty to the work of the aspects such as systems organization, system operation.
In device level measure, mainly comprise: high-impedance transformer, series reactor, transformers ' neutral point grounding via small reactance, high impedance generator, high-tension fuse, Is-quick current-limiting device, superconductive current limiter, temperature-sensitive (PTC) resistance, liquid metal flow restricter, the solid-state current limiter (Solid State Current Limiter, SSCL) based on power electronics, fault current limiter and the combined type fault current limiter etc. of application Electromagnetic Drive principle.
Fault current limiter is the short circuit current level of resolution system key point one of the important channel of problem that exceeds standard.From the development course of nearly decades, though flow restricter principle difference, version difference, and of a great variety, its most basic operating characteristic is similar, is all in the time that electrical network normally moves, to show as zero impedance or slight resistance, and power consumption is close to zero; In the time that electrical network is short-circuited fault, present rapidly high impedance to reach objects such as suppressing short circuit current.
What in existing fault current limiter, have mass market application prospect is to adopt multiple identical power module cascade connections, and the power device that each power model adopts is the turn-off device with anti-paralleled diode; Anti-paralleled diode and turn-off device are packaged together, when systematic steady state operation, line current flow through turn-off device and anti-paralleled diode in each power model, so just caused the steady-state loss of system very large, steady-state loss is greatly the defect of this fault current limiter maximum.
Summary of the invention:
The object of the present invention is to provide a kind of modularization current limiting circuit breaker power model of additional diode to overcome existing above-mentioned deficiency in prior art.
Technical scheme provided by the invention is: a kind of modularization current limiting circuit breaker power model of additional diode, and its improvements are:
Described power model comprises power model I, and described power model I comprises the power submodule in parallel with reactor or power resistor; Described power submodule comprises inverse parallel circuit 1, inverse parallel circuit 2, antihunt circuit and lightning arrester; Described inverse parallel circuit 1 and rear and in parallel antihunt circuit and the lightning arrester parallel connection of described inverse parallel circuit 2 series connection;
Described inverse parallel circuit 1 and described inverse parallel circuit 2 comprise turn-off device with anti-paralleled diode and with the antiparallel additional diode of the described turn-off device with anti-paralleled diode, the additional diode negative electrode of described inverse parallel circuit 1 is connected with the additional diode negative electrode of described inverse parallel circuit 2;
Described additional diode is any one additional diode of selecting from standard recovery diode or silicon carbide diode.
Preferably, described turn-off device is any one turn-off device of selecting from integrated gate commutated thyristor IGCT, gate level turn-off thyristor GTO, super gate level turn-off thyristor SGTO, IEGT IEGT or insulated gate bipolar transistor IGBT.
Further, lightning arrester is any one lightning arrester of selecting from metal oxide arrester, metal oxide pressure-limiting device, silicon-carbide arrester or expulsion type arrester.
Further, antihunt circuit is any one antihunt circuit of selecting from RC antihunt circuit, RCD antihunt circuit, LRCD antihunt circuit or active damping circuit.
Preferably, described inverse parallel circuit 1 comprises after one or more turn-off device parallel connections with anti-paralleled diode in parallel with one or more additional diode.
Further, inverse parallel circuit 2 comprises after one or more turn-off device parallel connections with anti-paralleled diode in parallel with one or more additional diode.
Further, described power model also comprises power model II, and described power model II is by rear form in parallel with reactor or power resistor of two or more power submodule series connection.
Preferably, power model I cascade formation current limiting circuit breaker, solid circuit breaker or fault current limiter successively described in two or more.
Further, power model II cascade formation current limiting circuit breaker, solid circuit breaker or fault current limiter successively described in two or more.
Further, one or more power models I and one or more power models II combination in any cascade formation current limiting circuit breaker, solid circuit breaker or fault current limiter successively.
Compared with immediate technical scheme, the present invention has following beneficial effect:
1, this power model has been realized standardization and the Redundancy Design of whole current limiting circuit breaker, is conducive to reliability and the interchangeability of whole current limiting circuit breaker, thereby improves the availability factor of whole current limiting circuit breaker;
2, the steady-state loss of this power model is few, has reduced the operating cost of fault current limiter or solid circuit breaker, has improved reliability;
3, the steady-state loss of power model reduces, and has reduced the heat dissipation capacity requirement of cooling system, thereby has made weight decline, cost reduction and the volume-diminished of cooling system, makes weight decline, cost reduction and the volume-diminished of modular solid-state flow restricter, more competitive.
Brief description of the drawings:
Fig. 1 is power submodule 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 diode and two power submodule schematic diagrams that the IGCT with anti-paralleled diode is in parallel;
Fig. 5 is two IGCT with anti-paralleled diode and a power submodule schematic diagram that additional diode is in parallel;
Fig. 6 is the power model of power resistor in parallel;
Fig. 7 is the power model of shunt reactor;
Fig. 8 is the power model schematic diagram in parallel with reactor after two power submodule series connection;
Fig. 9 is the cascade schematic diagram of power model.
Embodiment:
In order to understand better the present invention, below in conjunction with Figure of description and embodiment, content of the present invention is further described:
The power submodule schematic diagram of modularization current limiting circuit breaker power model is as shown in Figure 1:
The additional diode D1 adopting in Fig. 1 and D2 can be standard recovery diode (Standard Recovery Diodes, SRD), can be also the better performances such as silicon carbide diode, and the lower diode of on-state voltage drop;
The turn-off device adopting in Fig. 1 is IGCT, but can be with super gate level turn-off thyristor SGTO, insulated gate 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, or IEGT (Injection Enhanced Gate Transistor, IEGT) GTO).
Lightning arrester; claim again overvoltage protection device, Surge Protector, surge protector, lightning protection device, voltage limiter etc.; lightning arrester in Fig. 1 is only for limiting the overvoltage producing because of system operation, is any one in metal oxide arrester, metal oxide pressure-limiting device, silicon-carbide arrester, expulsion type arrester.
Antihunt circuit (Snubber Circuit), claim buffer circuit or absorbing circuit again.Its effect is internal cause overvoltage, du/dt or overcurrent and the di/dt that suppresses power electronic device, reduces the switching loss of device.The antihunt circuit adopting in Fig. 1 is succinct RC antihunt circuit;
Antihunt circuit in Fig. 1 also can adopt the antihunt circuit of the RCD in Fig. 2, the LRCD antihunt circuit in Fig. 3, or other antihunt circuit schemes, such as LC antihunt circuit and various active damping circuit etc.
Conventionally, the integrated anti-paralleled diode of device such as SGTO, IGBT, IGCT all belongs to fast recovery diode (Fast Recovery Diode, FRD).FRD is a kind of semiconductor diode with features such as switching characteristic are good, reverse recovery time is short, but corresponding on-state voltage drop wants high.Additional diode SRD is a kind of semiconductor diode with features such as large current handling capability, on-state voltage drop are low, but SRD is optimized and designs for power frequency condition of work, inapplicable high frequency or need the operating mode of fast quick-recovery.
When normal operation, power submodule current through line electric current or load current as shown in Figure 1, because the on-state voltage drop of additional diode SRD is lower than the on-state voltage drop of FRD, therefore line current or the load current additional diode of flowing through, be SRD, then flow out this power submodule after IGCT1 or IGCT2.Because the on-state voltage drop of additional diode SRD is lower than the on-state voltage drop of FRD, therefore, the steady-state loss of power submodule will have remarkable minimizing.
When the system failure, control protection system and identify fast fault-signal, order IGCT1 and IGCT2 turn-off.As shown in Figure 1: in turn off process, born the voltage U at whole power submodule two ends by IGCT1 or IGCT2
m, diode (comprising anti-paralleled diode and additional diode) does not need to bear voltage drop; Because IGCT1 or IGCT2 bear the responsibility of open-circuit line electric current or load current, even if diode does not have fast restoration capabilities, do not affect whole power submodule yet and remove to cut-off line current or load current.
Therefore, additional standard recovery diode can reduce the steady-state loss of power model, the quick shutoff while simultaneously not affecting the through-flow and fault of power model when normal.
The power submodule of additional standard recovery diode is suitable resistance in parallel or reactance (as shown in Fig. 6 or Fig. 7) formation power model again, power model can be used as fault current limiter by (as shown in Figure 9) after cascade again and uses, also can be used as solid circuit breaker use, more can be used as current limiting circuit breaker and use.
In Fig. 1, attempt an example with the relevant power electronic device product of ABB.Turn-off device adopts the IGCT5SHZ19L6020 of ABB reverse-conducting.The repetitive peak off state voltage V of door pole stream-exchanging thyristor GCT (Gate Commutated Thyristors) in IGCT
dRM(Repetitive peak off-state voltage) is 5500V, maximum on-state average current I
t (AV) M(Max.average on-state current) is 840A.The maximum on-state average current I of the diode in IGCT
f (AV) M(Max.average on-state current) is 340A, threshold voltage V
(F0)(Threshold voltage) is 2.7V, on-state slope resistance r
f(Slope resistance) is 2.23m Ω.
Additional diode adopts ABB rectifier diode 5SDD33L5500, maximum non-repetitive peak reverse voltage V
rSM(Max non-repetitive peak reverse voltage) is 5500V, on-state average current I
f (AV) M(Average on-state current) is 3480A, threshold voltage V
f0(Threshold voltage) is 0.94V, on-state slope resistance r
f(Slope resistance) is 0.147m Ω.
Obviously, the threshold voltage V of rectifier diode
f0with on-state slope resistance r
fall than the threshold voltage V of the fast quick-recovery anti-paralleled diode of IGCT
f0with on-state slope resistance r
flittle many, therefore, it is little more than 50% that the steady-state loss of diode is at least wanted.
In Fig. 4, provided another kind of power submodule, this power submodule comprises two IGCT and two additional diode parallel connections with anti-paralleled diode; Certainly, the IGCT with anti-paralleled diode is in parallel with more than three or three additional diode above also can to adopt three or three, to adapt to the operating mode that line current or load circuit are larger.
In Fig. 5, provide after the IGCT parallel connection of two anti-paralleled diodes again and a situation that additional diode is in parallel, certainly, can be also three or three respective combination of one or more additional diode in parallel again after the IGCT parallel connection with anti-paralleled diode above.
In Fig. 6, provide the power model of power resistor in parallel.
In Fig. 7, provide the power model of shunt reactor.
In Fig. 8, provide the power model of a reactor in parallel again after the series connection of two power submodules, also can adopt more than three or three power submodule series connection scheme of a reactor of parallel connection again according to the actual conditions of design and engineering.Certainly, also can adopt after the series connection of two or more power submodules the scheme of a power resistor in parallel again.
The power submodule of connecting in Fig. 8 can be the power submodule in Fig. 1; Also can be the power submodule in Fig. 4 or Fig. 5.
In Fig. 9, provided the cascade signal of power model, the power model of series connection can be any one power model in Fig. 4, Fig. 5, Fig. 6, Fig. 7 or Fig. 8 entirely, can be also the combination in any cascade of above-mentioned several power models.
These are only embodiments of the invention, be not limited to the present invention, within the spirit and principles in the present invention all, any amendment of making, be equal to replacement, improvement etc., within all should being included in the claim scope of the present invention that application awaits the reply.
Claims (10)
1. a modularization current limiting circuit breaker power model for additional diode, is characterized in that:
Described power model comprises power model I, and described power model I comprises the power submodule in parallel with reactor or power resistor; Described power submodule comprises inverse parallel circuit 1, inverse parallel circuit 2, antihunt circuit and lightning arrester; Described inverse parallel circuit 1 and rear and in parallel antihunt circuit and the lightning arrester parallel connection of described inverse parallel circuit 2 series connection;
Described inverse parallel circuit 1 and described inverse parallel circuit 2 comprise turn-off device with anti-paralleled diode and with the antiparallel additional diode of the described turn-off device with anti-paralleled diode, the additional diode negative electrode of described inverse parallel circuit 1 is connected with the additional diode negative electrode of described inverse parallel circuit 2;
Described additional diode is any one additional diode of selecting from standard recovery diode or silicon carbide diode.
2. the modularization current limiting circuit breaker power model of a kind of additional diode as claimed in claim 1, is characterized in that:
Described turn-off device is any one turn-off device of selecting from integrated gate commutated thyristor IGCT, gate level turn-off thyristor GTO, super gate level turn-off thyristor SGTO, IEGT IEGT or insulated gate bipolar transistor IGBT.
3. the modularization current limiting circuit breaker power model of a kind of additional diode as claimed in claim 2, is characterized in that:
Lightning arrester is any one lightning arrester of selecting from metal oxide arrester, metal oxide pressure-limiting device, silicon-carbide arrester or expulsion type arrester.
4. the modularization current limiting circuit breaker power model of a kind of additional diode as claimed in claim 3, is characterized in that:
Antihunt circuit is any one antihunt circuit of selecting from RC antihunt circuit, RCD antihunt circuit, LRCD antihunt circuit or active damping circuit.
5. the modularization current limiting circuit breaker power model of a kind of additional diode as claimed in claim 1, is characterized in that:
Described inverse parallel circuit 1 comprises after one or more turn-off device parallel connections with anti-paralleled diode in parallel with one or more additional diode.
6. the modularization current limiting circuit breaker power model of a kind of additional diode as claimed in claim 5, is characterized in that:
Inverse parallel circuit 2 comprises after one or more turn-off device parallel connections with anti-paralleled diode in parallel with one or more additional diode.
7. the modularization current limiting circuit breaker power model of a kind of additional diode as described in claim 1 or 5 or 6, is characterized in that:
Described power model also comprises power model II, and described power model II is by rear form in parallel with reactor or power resistor of two or more power submodule series connection.
8. the modularization current limiting circuit breaker power model of a kind of additional diode as claimed in claim 1, is characterized in that:
Power model I cascade formation current limiting circuit breaker, solid circuit breaker or fault current limiter successively described in two or more.
9. the modularization current limiting circuit breaker power model of a kind of additional diode as claimed in claim 7, is characterized in that:
Power model II cascade formation current limiting circuit breaker, solid circuit breaker or fault current limiter successively described in two or more.
10. the modularization current limiting circuit breaker power model of a kind of additional diode as claimed in claim 7, is characterized in that:
One or more power models I and one or more power models II combination in any successively cascade form current limiting circuit breaker, 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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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104143775A (en) * | 2014-08-18 | 2014-11-12 | 国家电网公司 | Power electronic transformer substation |
| CN104779593A (en) * | 2015-04-22 | 2015-07-15 | 中国船舶重工集团公司第七一二研究所 | Direct-current solid circuit breaker and control method thereof |
| 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 |
| CN114629098A (en) * | 2022-02-23 | 2022-06-14 | 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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| 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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| CN102496919A (en) * | 2011-11-24 | 2012-06-13 | 华北电力大学 | Load unbalance compensation current limiter |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104143775A (en) * | 2014-08-18 | 2014-11-12 | 国家电网公司 | Power electronic transformer substation |
| CN104143775B (en) * | 2014-08-18 | 2016-04-20 | 国家电网公司 | A kind of power electronic transformer substation |
| CN104779593A (en) * | 2015-04-22 | 2015-07-15 | 中国船舶重工集团公司第七一二研究所 | Direct-current solid circuit breaker and control method thereof |
| 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 |
| CN114629098A (en) * | 2022-02-23 | 2022-06-14 | 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 |
| 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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