CN202650895U - High voltage direct current hybrid circuit breaker with buffer circuit - Google Patents

High voltage direct current hybrid circuit breaker with buffer circuit Download PDF

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Publication number
CN202650895U
CN202650895U CN 201120504618 CN201120504618U CN202650895U CN 202650895 U CN202650895 U CN 202650895U CN 201120504618 CN201120504618 CN 201120504618 CN 201120504618 U CN201120504618 U CN 201120504618U CN 202650895 U CN202650895 U CN 202650895U
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CN
China
Prior art keywords
circuit breaker
circuit
parallel
diode
polarity
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CN 201120504618
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Chinese (zh)
Inventor
于尔根·哈夫纳
阿曼·哈桑普尔
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Abb技术有限公司
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Priority to CN 201120504618 priority Critical patent/CN202650895U/en
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Publication of CN202650895U publication Critical patent/CN202650895U/en

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Abstract

The utility model provides a high voltage direct current hybrid circuit breaker with a buffer circuit. The circuit breaker comprises a solid main circuit breaker, a mechanical rapid isolating switch and an auxiliary circuit breaker (200). The isolating switch and the auxiliary circuit breaker are connected in series. The auxiliary circuit breaker (200) comprises a first branch circuit (251) which comprises a power semiconductor switching element (210), a buffer capacitor (221), and a diode (225). The diode (225) and the power semiconductor switching element (210) are connected in series so as to prevent that the buffer capacitor (221) carries out uncontrolled discharge through the main circuit breaker. In addition, the auxiliary circuit breaker (200) comprises a second branch circuit (252) which is same with the first branch circuit (251) and is connected to the first branch circuit (251) in an inverse parallel way. According to the inverse parallel connection of the first branch circuit (251) and the second branch circuit (252), bidirectional operation of the circuit breaker is allowed.

Description

High voltage direct current hybrid circuit breaker with buffer circuit

Technical field

The present invention relates generally to high voltage direct current (HVDC) hybrid circuit breaker, relate more specifically to the buffer circuit in such circuit-breaker.

Background technology

Such as disclosed HVDC hybrid circuit breaker among the WO2011/057675 usually based on the combination of the solid-state main circuit breaker that is connected in series that is parallel-connected to solid-state auxiliary circuit breaker and mechanical isolation switch.The operation principle of hybrid circuit breaker is that main circuit breaker, auxiliary circuit breaker and isolating switch are closed during normal running.If receive cut-off signal, then hybrid circuit breaker is by at first making auxiliary circuit breaker opens attempt disconnecting to flow through the electric current of circuit breaker, thereby the current commutates of will flow through auxiliary circuit breaker and isolating switch is to main circuit breaker.Subsequently, make isolating switch open a way to isolate auxiliary circuit breaker, and finally make the main circuit breaker open circuit, cause electric current is rectified to surge arrester from main circuit breaker, wherein, this surge arrester is parallel-connected to main circuit breaker.

Often, hybrid circuit breaker is provided with buffer circuit, the voltage transient that occurs with the unexpected interruption that suppresses response current when making the isolating switch open circuit.Buffer circuit generally includes the capacitor that is parallel-connected to auxiliary circuit breaker.

When making auxiliary circuit breaker opens come the opening operation of initialization hybrid circuit breaker, to the buffer condenser charging, but electric current one is rectified to main circuit breaker from auxiliary circuit breaker, and capacitor just discharges by isolating switch and main circuit breaker.This discharge process and the non-zero current of passing through isolating switch that causes hinder the opening operation of isolating switch.

Summary of the invention

The purpose of this invention is to provide the more effective of above technology and prior art substituted.

More specifically, the purpose of this invention is to provide a kind of improved HVDC hybrid circuit breaker.

These and other objects of the present invention realize by direct current (DC) circuit-breaker with the feature defined in the independent claims 1.Embodiments of the invention are characterized by dependent claims.

According to aspects of the present invention, provide a kind of DC circuit-breaker.Circuit-breaker comprises main circuit breaker, isolating switch and auxiliary circuit breaker.Isolating switch and auxiliary circuit breaker are connected in series.Being connected in series of isolating switch and auxiliary circuit breaker is parallel-connected to main circuit breaker.Auxiliary circuit breaker comprises the first circuit and second circuit.The first circuit comprises power semiconductor switch element, the first diode and buffer circuit.The first diode has the first polarity, and is connected in series with the power semiconductor switch element.Buffer circuit comprises capacitor, the first resistor, the second diode and the second resistor.The first resistor is parallel-connected to capacitor.The second diode has the first polarity.The second resistor is parallel-connected to the second diode.Being connected in parallel of the second diode and the second resistor is connected in series with capacitor and being connected in parallel of the first resistor.Second circuit is identical with the first circuit.The first circuit is connected inverse parallel and is connected with second circuit.

The present invention has used such understanding: by being that auxiliary circuit breaker is provided with the diode that is connected in series with the power semiconductor switch element, can prevent the uncontrolled discharge of buffer condenser during the opening operation of HVDC hybrid circuit breaker.Diode will prevent by main circuit breaker the uncontrolled discharge of buffer condenser.And, two identical branch roads that connect by each other inverse parallel is set, the bidirectional operation of circuit breaker is possible.

Since can alleviate be associated with the hybrid circuit breaker of prior art, owing to the problem that the discharging current of flow through from capacitor isolating switch and main circuit breaker causes, embodiments of the invention are useful.More specifically, the flow through non-zero current of isolating switch of hybrid circuit breaker of prior art hinders the disconnection action of isolating switch.On the other hand, in an embodiment of the present invention, prevent the uncontrolled discharge of capacitor, allow thus the isolating switch turn-off current.

According to embodiments of the invention, the power semiconductor switch element comprises insulated gate bipolar transistor (1GBT) and the 3rd diode.IGBT has the second polarity.The 3rd diode has the first polarity.The 3rd diodes in parallel is connected to IGBT.The first polarity is opposite with the second polarity.

According to embodiments of the invention, the power semiconductor switch element comprises double mode gated transistor (BiGT) and the 3rd diode.BiGT has the second polarity.The 3rd diode has the first polarity.The 3rd diodes in parallel is connected to BiGT.The first polarity is opposite with the second polarity.

According to embodiments of the invention, main circuit breaker comprises a plurality of power semiconductor switch elements.Switch element is connected in series.

According to embodiment of the present disclosure, isolating switch comprises mechanical switch.

According to embodiment of the present disclosure, auxiliary circuit breaker comprises the power semiconductor switch element.And auxiliary circuit breaker can comprise a plurality of power semiconductor switch elements that are connected in series.

Although reference has been described advantage of the present invention in some cases according to the embodiment of the hybrid circuit breaker of first aspect present invention, corresponding reasoning is applied to the embodiment according to the method for second aspect present invention.

When disclosing in detail below the research, accompanying drawing and appending claims, other purpose of the present invention, characteristics and advantage will become obvious.Those skilled in the art understand different characteristic of the present invention capable of being combined, to create the embodiment except following described those embodiment.

Description of drawings

With reference to the accompanying drawings to illustrative and the nonrestrictive detailed description of the embodiment of the invention, will understand better above and additional purpose, characteristics and advantage of the present invention by following, in the accompanying drawings:

Fig. 1 is the schematic diagram of the HVDC hybrid circuit breaker of prior art.

Fig. 2 is the schematic diagram according to the HVDC hybrid circuit breaker of the embodiment of the invention.

All figure are schematically, do not need calibration, and the parts that need generally only are shown with explanation the present invention, and wherein, other parts can be omitted or only hint.

Embodiment

With reference to figure 1, the HVDC hybrid circuit breaker of prior art is described.

Hybrid circuit breaker 100 comprises that main circuit breaker 110, quick isolation switch are speed-sensitive switch 120, auxiliary circuit breaker 130, surge arrester 140 and buffer condenser 150.Isolating switch 120 and auxiliary circuit breaker 130 are connected in series, and being connected in series of isolating switch 120 and auxiliary circuit breaker 130 is parallel-connected to main circuit breaker 110.Surge arrester 140 is parallel-connected to being connected in series of main circuit breaker 110 and isolating switch 120 and auxiliary circuit breaker 130.Buffer condenser 150 is parallel-connected to auxiliary circuit breaker 130.

Hybrid circuit breaker 100 can be connected to external circuit by terminal 101 and 102, for example the HVDC transmission line.For example, hybrid circuit breaker 100 can be used for the HVDC transmission line is connected to the bus of inking device, is used for isolating transmission line from bus when breaking down, and perhaps is used for safeguarding.

Below, the operation principle of description hybrid circuit breaker 100.During normal running, main circuit breaker 110, isolating switch 120 and auxiliary circuit breaker 130 closures.If hybrid circuit breaker 100 receives cut-off signal, then circuit-breaker 100 is by at first making auxiliary circuit breaker 130 open circuits, attempt disconnecting flow through circuit-breaker 100, namely from terminal 101 to terminal 102 or from terminal 102 to terminal 101 electric current, the current commutates of will flow through thus auxiliary circuit breaker 130 and isolating switch 120 is to main circuit breaker 110.Subsequently, make isolating switch 120 open a way to isolate auxiliary circuit breaker 130, and finally make main circuit breaker 110 open circuits, cause electric current is rectified to surge arrester 140 from main circuit breaker 110.

The voltage transient that occurs for the unexpected interruption that suppresses response current when making isolating switch 120 open circuit, hybrid circuit breaker 100 is equipped with buffer condenser 150.

The hybrid circuit breaker of prior art, for example with reference to the problem that occurs in the hybrid circuit breaker 100 of figure 1 description be, as illustrated by arrow 160 among Fig. 1, when auxiliary circuit breaker 130 open circuit, the buffer condenser 150 of charging is by isolating switch 120 and main circuit breaker 110 discharges.The non-zero current of isolating switch 120 owing to flowing through hinders the disconnection action of isolating switch 120.

Below, be described with reference to Figure 2 embodiments of the invention.For simplicity, only illustrate auxiliary circuit breaker among Fig. 2, namely among Fig. 2 illustrated circuit corresponding to the circuit 170 of Fig. 1.

Two identical branch roads 251 that auxiliary circuit breaker 200 comprises that each other inverse parallel connects and 252.As shown in Figure 2, the first branch road 251 comprises diode 225, and these diode 225 inverse parallels are connected to the transistor of power semiconductor switch element 210.The transistor that comprises in the power semiconductor switch element 210 can for example be IGBT or BiGT.In addition, the first branch road 251 comprises buffer circuit, and this buffer circuit comprises capacitor 221, be parallel-connected to the resistor 222 of capacitor 221, diode 223 and be parallel-connected to the resistor 224 of diode 223.

The purpose of the diode 225 that is connected in series with power semiconductor switch element 210 is to prevent that buffer condenser 221 from discharging by isolating switch and the main circuit breaker of hybrid circuit breaker.The first branch road 251 be connected the inverse parallel of branch road 252 and connect allow the bidirectional operation of circuit breaker.

Those skilled in the art understand the present invention and never are limited to above-described embodiment.On the contrary, within the scope of appended claims, can carry out many modifications and modification.

In a word, provide a kind of HVDC hybrid circuit breaker.Circuit-breaker comprises solid-state main circuit breaker, mechanical quick isolation switch and auxiliary circuit breaker.Isolating switch and auxiliary circuit breaker are connected in series.Auxiliary circuit breaker comprises the first branch road, and this first branch road comprises power semiconductor switch element, buffer condenser and diode.Diode and power semiconductor switch element are connected in series, and carry out uncontrolled discharge to prevent buffer condenser by main circuit breaker.In addition, auxiliary circuit breaker comprises the second branch road, and the inverse parallel identical with the first branch road of this second branch road is connected to the first branch road.The first branch road be connected the inverse parallel of branch road and connect allow the bidirectional operation of circuit breaker.

Claims (5)

1. high voltage direct current hybrid circuit breaker (100) with buffer circuit comprising:
Main circuit breaker (110), and
The isolating switch that is connected in series (120) and auxiliary circuit breaker (170), described being connected in series with described main circuit breaker of described isolating switch and described auxiliary circuit breaker is connected in parallel,
Wherein, described auxiliary circuit breaker (170) comprising:
The first circuit (251) comprising:
Power semiconductor switch element (210),
The first diode (225), it has the first polarity, is connected in series with described power semiconductor switch element (210), and
Buffer circuit, it is parallel-connected to described power semiconductor switch element (210), and described buffer circuit comprises:
Capacitor (221),
The first resistor (222), it is parallel-connected to described capacitor (221),
The second diode (223), it has described the first polarity, and
The second resistor (224), it is parallel-connected to described the second diode (223),
Wherein, being connected in parallel of described the second diode (223) and described the second resistor (224) is connected in series with described capacitor (221) and being connected in parallel of described the first resistor (222), and
Second circuit (251), it is identical with described the first circuit,
Wherein, described the first circuit (251) be connected second circuit (252) each other inverse parallel connect.
2. the high voltage direct current hybrid circuit breaker with buffer circuit according to claim 1, wherein, described power semiconductor switch element comprises the insulated gate bipolar transistor IGBT with second polarity, and have described the first polarity, be parallel-connected to the 3rd diode of described IGBT, wherein, described the first polarity is opposite with described the second polarity.
3. the high voltage direct current hybrid circuit breaker with buffer circuit according to claim 1, wherein, described power semiconductor switch element comprises the double mode gated transistor BiGT with second polarity, and have described the first polarity, be parallel-connected to the 3rd diode of described BiGT, wherein, described the first polarity is opposite with described the second polarity.
4. the high voltage direct current hybrid circuit breaker with buffer circuit according to claim 1, wherein, described main circuit breaker comprises a plurality of power semiconductor switch elements that are connected in series.
5. the high voltage direct current hybrid circuit breaker with buffer circuit according to claim 1, wherein, described isolating switch comprises mechanical switch.
CN 201120504618 2011-12-07 2011-12-07 High voltage direct current hybrid circuit breaker with buffer circuit CN202650895U (en)

Priority Applications (1)

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CN 201120504618 CN202650895U (en) 2011-12-07 2011-12-07 High voltage direct current hybrid circuit breaker with buffer circuit

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103532089A (en) * 2013-10-25 2014-01-22 国家电网公司 Novel circuit breaker
CN103972875A (en) * 2013-01-31 2014-08-06 南京南瑞继保电气有限公司 Device and control method for limiting line current or implementing current interruption
WO2014117613A1 (en) * 2013-01-31 2014-08-07 南京南瑞继保电气有限公司 Apparatus for breaking line bidirectional current and control method therefor
CN104009450A (en) * 2014-05-07 2014-08-27 华南理工大学 Module combination high-voltage direct-current breaker

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103972875B (en) * 2013-01-31 2016-07-06 南京南瑞继保电气有限公司 Limit line current or make device and the control method thereof of electric current disjunction
CN103972875A (en) * 2013-01-31 2014-08-06 南京南瑞继保电气有限公司 Device and control method for limiting line current or implementing current interruption
WO2014117614A1 (en) * 2013-01-31 2014-08-07 南京南瑞继保电气有限公司 Apparatus for limiting current of circuit or breaking current, and control method thereof
WO2014117613A1 (en) * 2013-01-31 2014-08-07 南京南瑞继保电气有限公司 Apparatus for breaking line bidirectional current and control method therefor
US9362734B2 (en) 2013-01-31 2016-06-07 Nr Electric Co., Ltd Apparatus for limiting current of line or breaking current, and control method thereof
RU2614807C2 (en) * 2013-01-31 2017-03-29 Нр Электрик Ко., Лтд Device for limiting or interrupting current in power transmission line and method of controlling said device
US9634476B1 (en) 2013-01-31 2017-04-25 Nr Electric Co., Ltd Apparatus for breaking line bidirectional current and control method thereof
CN103532089A (en) * 2013-10-25 2014-01-22 国家电网公司 Novel circuit breaker
CN104009450A (en) * 2014-05-07 2014-08-27 华南理工大学 Module combination high-voltage direct-current breaker
CN104009450B (en) * 2014-05-07 2017-08-25 华南理工大学 Block combiner high voltage DC breaker

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Effective date of registration: 20180531

Address after: Baden, Switzerland

Patentee after: ABB TECHNOLOGY LTD.

Address before: Zurich

Patentee before: ABB T & D Technology Ltd.