CN202650896U - High voltage direct current hybrid circuit breaker with buffer circuit - Google Patents
High voltage direct current hybrid circuit breaker with buffer circuit Download PDFInfo
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- CN202650896U CN202650896U CN 201120504619 CN201120504619U CN202650896U CN 202650896 U CN202650896 U CN 202650896U CN 201120504619 CN201120504619 CN 201120504619 CN 201120504619 U CN201120504619 U CN 201120504619U CN 202650896 U CN202650896 U CN 202650896U
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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 power semiconductor switching element (210) and a buffer circuit. The buffer circuit comprises two capacitors (221, 223), two resistors (222, 224) and a diode (225). During the opening operation, the buffer capacitor (221) is charged, and subsequently an electric charge is shared by the capacitor (221) and the capacitor (223) and is consumed by the resistor (222). During the opening operation, the charging of the capacitor (223) is prevented by the resistor (224), and the capacitor (221) and the capacitor (223) can share stored energy.
Description
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 circuit 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 power semiconductor switch element and buffer circuit.Buffer circuit is parallel-connected to the power semiconductor switch element.Buffer circuit comprises the first capacitor, the second capacitor, the first resistor, the second resistor and the first diode.The first resistor is parallel-connected to the first capacitor.The second resistor is connected with the second capacitor's seriesu.Being connected in series of the second resistor and the second capacitor is parallel-connected to the first capacitor and the first resistor.The first diode has the first polarity, and is connected in series with being connected in parallel of following part: being connected in series of the first capacitor, the first resistor and the second resistor and the second capacitor.
The present invention has used such understanding: by being that auxiliary circuit breaker is provided with the buffer circuit of above describing, can prevent the uncontrolled discharge of buffer condenser during the opening operation of HVDC hybrid circuit breaker.During opening time, to the first capacitor charging, and subsequently, stored charge will be shared between the first capacitor and the second capacitor, and be consumed by the resistor of parallel connection.
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 (IGBT) and the second diode.IGBT has the first polarity.The second diode has the second polarity, and this second polarity is opposite with the first polarity.The second diodes in parallel is connected to IGBT.
According to embodiments of the invention, the power semiconductor switch element comprises double mode gated transistor (BiGT) and the second diode.BiGT has the first polarity.The second diode has the second polarity, and this second polarity is opposite with the first polarity.The second diodes in parallel is connected to BiGT.
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.
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.
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 power semiconductor switch element and buffer circuit, and this buffer circuit comprises two capacitors, two resistors and diode.During opening operation, to the buffer condenser charging, and subsequently, electric charge will be shared by capacitor and be consumed by resistor.During opening operation, resistor prevents the charging of capacitor, thereby makes capacitor and capacitor share the energy of storing.
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:
Power semiconductor switch element (210), and
Buffer circuit, it is parallel-connected to described power semiconductor switch element (210), and described buffer circuit comprises:
The first capacitor (221),
The first resistor (222), it is parallel-connected to described the first capacitor (221),
The second capacitor (223),
The second resistor (224), itself and described the second capacitor (223) are connected in series, wherein, being connected in series of described the second resistor (224) and described the second capacitor (223) is parallel-connected to described the first capacitor (221) and described the first resistor (222), and
The first diode (225), it has the first polarity, and is connected in series with being connected in parallel of following part: described the first capacitor (221), described the first resistor (222) and described the second resistance (224) are connected in series with described the second capacitor (223).
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 described first polarity, and have the second polarity, be parallel-connected to the second diode of described IGBT, wherein, described the second polarity is opposite with described the first 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 described first polarity, and have the second polarity, be parallel-connected to the second diode of described BiGT, wherein, described the second polarity is opposite with described the first 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120504619 CN202650896U (en) | 2011-12-07 | 2011-12-07 | High voltage direct current hybrid circuit breaker with buffer circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120504619 CN202650896U (en) | 2011-12-07 | 2011-12-07 | High voltage direct current hybrid circuit breaker with buffer circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202650896U true CN202650896U (en) | 2013-01-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120504619 Expired - Lifetime CN202650896U (en) | 2011-12-07 | 2011-12-07 | High voltage direct current hybrid circuit breaker with buffer circuit |
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| CN (1) | CN202650896U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103647263A (en) * | 2013-12-04 | 2014-03-19 | 中国科学院电工研究所 | DC circuit breaker based on half-control electric-power electronic devices |
| CN105429099A (en) * | 2016-01-04 | 2016-03-23 | 许继集团有限公司 | High-voltage DC quick circuit breaker and power sub-module thereof |
| CN109690714A (en) * | 2016-09-09 | 2019-04-26 | 伊顿智能动力有限公司 | Protective switch device |
| CN111355213A (en) * | 2018-12-21 | 2020-06-30 | 平高集团有限公司 | Direct current breaker |
-
2011
- 2011-12-07 CN CN 201120504619 patent/CN202650896U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103647263A (en) * | 2013-12-04 | 2014-03-19 | 中国科学院电工研究所 | DC circuit breaker based on half-control electric-power electronic devices |
| CN103647263B (en) * | 2013-12-04 | 2017-04-05 | 中国科学院电工研究所 | Dc circuit breaker based on half control type power electronic devices |
| CN105429099A (en) * | 2016-01-04 | 2016-03-23 | 许继集团有限公司 | High-voltage DC quick circuit breaker and power sub-module thereof |
| CN109690714A (en) * | 2016-09-09 | 2019-04-26 | 伊顿智能动力有限公司 | Protective switch device |
| US11373816B2 (en) | 2016-09-09 | 2022-06-28 | Eaton Intelligent Power Limited | Circuit breaker |
| CN111355213A (en) * | 2018-12-21 | 2020-06-30 | 平高集团有限公司 | Direct current breaker |
| CN111355213B (en) * | 2018-12-21 | 2023-09-01 | 平高集团有限公司 | Direct current breaker |
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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 |
Effective date of registration: 20180601 Address after: Baden, Switzerland Patentee after: ABB TECHNOLOGY LTD. Address before: Zurich Patentee before: ABB T & D Technology Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210514 Address after: Baden, Switzerland Patentee after: ABB grid Switzerland AG Address before: Baden, Switzerland Patentee before: ABB Switzerland Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130102 |
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| CX01 | Expiry of patent term |