CN111541222A - High-power tokamak device magnet power supply system quench protection switch - Google Patents
High-power tokamak device magnet power supply system quench protection switch Download PDFInfo
- Publication number
- CN111541222A CN111541222A CN202010502549.6A CN202010502549A CN111541222A CN 111541222 A CN111541222 A CN 111541222A CN 202010502549 A CN202010502549 A CN 202010502549A CN 111541222 A CN111541222 A CN 111541222A
- Authority
- CN
- China
- Prior art keywords
- branch
- current
- switch
- diode
- series
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/001—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for superconducting apparatus, e.g. coils, lines, machines
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
- H01H9/541—Contacts shunted by semiconductor devices
- H01H9/542—Contacts shunted by static switch means
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
- H01H9/547—Combinations of mechanical switches and static switches, the latter being controlled by the former
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/60—Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment
Abstract
The invention discloses a quench protection switch of a magnet power supply system of a high-power Tokamak device, which comprises an explosion switch, a multi-fracture high-speed mechanical switch, an artificial current zero circuit, a solid-state circuit breaker, a crystal smashing tube, a diode and an energy transfer resistor. The multi-fracture high-speed mechanical switch, the crystal-breaking tube T, the artificial current zero circuit and the diode bridge arm form a primary current-carrying branch, the solid-state circuit breaker serves as a secondary current-carrying branch, the energy-transfer resistor serves as a tertiary current-carrying branch, and finally the explosion switch serves as a backup protection unit and is connected with the main protection branch in series. The invention is mainly applied to a magnet power supply system of a fusion Tokamak device, and when a superconducting magnet coil is in failure time, a failure protection switch starts to act to protect the magnet power supply system.
Description
Technical Field
The invention belongs to the field of direct-current protection switches, and particularly relates to a quench protection switch of a magnet power supply system of a high-power Tokamak device.
Background
Nuclear fusion energy is a new energy source and is widely concerned in the world, and a tokamak nuclear fusion device is known as the most effective device for carrying out controllable nuclear fusion experiments so far. The magnet power supply system of the Tokamak device runs in a full superconducting mode, the superconducting coil stores huge energy, and when quench occurs, if the energy cannot be released quickly, the superconducting coil is damaged, even the Tokamak device is endangered, and serious damage is caused to the Tokamak device, so that research on a quench protection switch becomes a key direction of the magnet power supply system.
Domestic current tokamak device all is miniature, and its quench protection switch mostly takes the most traditional mode, and mechanical switch connects the second grade current conversion mode of fuse-link in parallel promptly: the mechanical switch bears main current, when loss time is detected, the mechanical switch is switched off, the current is transferred to a branch where the fuse is located under the action of arc voltage, the fuse is fused under the action of large current, and the current is forced to be transferred to the energy transfer resistor branch. This approach has the greatest disadvantage of requiring fuse replacement each time, which makes maintenance relatively heavy, and is economically feasible for small tokamak devices, but for large tokamak devices, such as the CFETR fusion device that is about to be built in china, the number of superconducting coils increases and the current-voltage level becomes higher, which is cumbersome and uneconomical.
In recent years, the technology of high-power semiconductor devices is more mature, and more attention is paid to a hybrid direct-current switch, namely, a mechanical switch is connected with a solid-state switch in parallel. The current hybrid dc switch design is designed for small tokamak devices such as K-STAR in korea and JT-60SA in japan. However, for a large tokamak device, the following problems still exist in the existing magnet power supply quench protection switch design scheme.
1. The arc voltage of the mechanical switch needs to reach hundreds of volts to enable the solid-state switch to be conducted, and the higher the arc voltage is, the more serious the corrosion of the contact is; meanwhile, the mechanical switch needs strong insulation recovery capability to bear overvoltage when current is transferred to the energy transfer resistor.
2. The solid-state switch needs to have bidirectional turn-off capability, and can only flow large current for a short time and bear overvoltage after secondary commutation.
Disclosure of Invention
The invention provides a brand-new quench protection switch suitable for a magnet power supply system of a high-power Tokamak device, and quench protection is provided for the magnet power supply system.
The invention adopts the following technical scheme:
a quench protection switch of a magnet power supply system of a high-power Tokamak device comprises an explosion switch, a multi-fracture high-speed mechanical switch, an artificial current zero circuit, a solid-state circuit breaker, a crystal smashing pipe and an energy transfer resistor, wherein the multi-fracture high-speed mechanical switch, a first crystal smashing pipe T, the artificial current zero circuit and a diode bridge arm form a primary current-carrying branch, the solid-state circuit breaker connected with the primary current-carrying branch in parallel serves as a secondary current-carrying branch, the energy transfer resistor connected with the primary current-carrying branch and the secondary current-carrying branch in parallel serves as a tertiary current-carrying branch, and the explosion switch serves as a backup protection unit and is connected with the primary current.
Preferably, the multi-break high-speed mechanical switch comprises two secondary switches S1 and S2 which are connected in series, the first secondary switch S1 is connected in parallel with a diode bridge arm circuit, the diode bridge arm circuit is composed of a first transistor T, an artificial current zero circuit and a diode bridge arm, and the artificial current zero circuit is composed of a pre-charging capacitor C, an inductor L and a second transistor T1 which are connected in series.
Preferably, the first crystal smashing pipe T and the second crystal smashing pipe T1 are respectively formed by connecting a plurality of crystal smashing pipe branches in parallel, and each crystal smashing pipe branch is formed by connecting a plurality of crystal smashing pipes in series; each diode bridge arm branch is formed by connecting a plurality of diode branches in parallel, and each diode branch is formed by connecting a plurality of diodes in series.
Preferably, the solid-state circuit breaker is formed by connecting a forward power electronic device valve bank and a reverse power electronic device valve bank in series, and each group of power electronic devices is connected with a diode valve bank in parallel in a reverse direction.
Preferably, the power electronic device valve bank is formed by connecting a plurality of power electronic device branches in parallel, and each power electronic device branch is formed by connecting a plurality of power electronic devices in series.
Preferably, the diode valve bank is formed by connecting a plurality of diode branches in parallel, and each diode branch is formed by connecting a plurality of diodes connected in series.
When the magnet power supply system normally operates, the multi-break high-speed mechanical switch can bear steady-state current; when a quench signal is detected (generally, a superconducting coil quench is mostly detected), a first secondary switch S1 of the multi-break high-speed mechanical switch is switched off, a diode bridge arm is conducted in a corresponding voltage direction (has bidirectionality), a first crystallographically striking tube T is conducted, and current is transferred to a branch where the first crystallographically striking tube T is located under the action of arc voltage; when the contact of the first secondary switch S1 has certain insulating capacity, the second transistor T1 is conducted, the capacitor C discharges through the inductor L to generate reverse pulse current to turn off the T, the second secondary switch S2 is turned off in the period, and the current is transferred to the solid-state switch branch circuit; when the contact of the second-stage switch S2 is disconnected to a rated opening distance with a certain insulation voltage-resistant grade, the solid-state switch is disconnected, and the current is transferred to the energy-transfer resistance branch circuit; after the current is transferred to the energy-shifting resistor, a positive recovery overvoltage is formed and is applied to two ends of the mechanical switch and the solid-state switch; if the mechanical switch branch or the solid-state switch branch has a fault, the explosion switch is detonated to be switched on and off, and the current is transferred to the energy transfer resistor.
By adopting the technical scheme, compared with the prior art, the invention has the following advantages:
1. the low-loss current-carrying capacity of the multi-break high-speed mechanical switch and the quick turn-off capacity of the solid-state switch can be effectively combined; when the loss time is out, the energy can be quickly released, and the Tokamak device is prevented from being damaged.
2. The invention can realize bidirectional turn-off without judging the current direction; it is possible to pass a large current for a short time and withstand an overvoltage after a plurality of commutations.
3. The multi-fracture high-speed mechanical switch can realize arc-free turn-off; need not to change the fuse, reduced the maintenance work volume, promoted work efficiency. Meanwhile, the arc voltage required for forced current conversion is relatively small and can be up to hundreds of volts; the stability of work has been promoted.
4. The multi-fracture high-speed mechanical switch can improve the total arc voltage on the basis of not improving the arc voltage of a single fracture by increasing the number of the auxiliary contacts, thereby ensuring successful current conversion, reducing the current conversion time and prolonging the service life of the mechanical switch.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic design diagram of a multi-break high-speed mechanical switch.
FIG. 3 is a diagram of the operation timing of the switching circuit and the current waveform of each branch according to the present invention.
Detailed Description
The technical scheme of the invention is explained in detail in the following with the accompanying drawings:
as shown in fig. 1, a quench protection switch of a magnet power supply system of a high-power tokamak device comprises an explosion switch, a multi-fracture high-speed mechanical switch, an artificial current zero circuit, a solid-state circuit breaker, a crystal-breaking tube and an energy-shifting resistor, wherein the multi-fracture high-speed mechanical switch, a first crystal-breaking tube T, the artificial current zero circuit and a diode bridge arm form a primary current-carrying branch, the solid-state circuit breaker connected in parallel with the primary current-carrying branch serves as a secondary current-carrying branch, the energy-shifting resistor connected in parallel with the primary current-carrying branch and the secondary current-carrying branch serves as a tertiary current-carrying branch, and the explosion switch serves as a backup protection unit and is.
As shown in fig. 1, the multi-break high-speed mechanical switch of the invention includes two-stage switches S1, S2 connected in series, a first two-stage switch S1 is connected in parallel with a diode bridge arm circuit, the diode bridge arm circuit is composed of a first transistor T, an artificial current zero circuit and a diode bridge arm, and the artificial current zero circuit is composed of a pre-charge capacitor C, an inductor L and a second transistor T1 connected in series.
The first crystal smashing pipe T and the second crystal smashing pipe T1 are respectively formed by connecting a plurality of crystal smashing pipe branches in parallel, and each crystal smashing pipe branch is formed by connecting a plurality of crystal smashing pipes in series; each diode bridge arm branch is formed by connecting a plurality of diode branches in parallel, and each diode branch is formed by connecting a plurality of diodes in series.
The multi-fracture high-speed mechanical switch comprises a static contact, an auxiliary contact and a movable contact which are arranged in front, middle and rear, wherein the contact material is silver, the contact modes are all line contact, a high-melting-point contact is arranged as an arc contact, and a circulating water cooling system is arranged. The multi-break high-speed mechanical switch can select the number of the auxiliary contacts according to the requirements and the actual conditions of a fusion device magnet power supply system.
The solid-state circuit breaker is formed by connecting a forward power electronic device valve bank and a reverse power electronic device valve bank in series, and each group of power electronic devices is connected with a diode valve bank in parallel in a reverse direction.
The power electronic device valve bank is formed by connecting a plurality of power electronic device branches in parallel, and each power electronic device branch is formed by connecting a plurality of power electronic devices in series.
The diode valve bank is formed by connecting a plurality of diode branches in parallel, and each diode branch is formed by connecting a plurality of diodes in series.
As shown in FIG. 2, the multi-break high-speed mechanical switch of the invention is divided into two-stage switches S1 and S2 which are connected in series. The number of auxiliary contacts of the first secondary switch S1 can be increased according to the needs of a fusion device magnet power supply system, so that the arc voltage is further increased on the basis of not increasing the arc voltage of a single fracture, successful commutation can be ensured, the commutation time can be shortened, and the service life of a mechanical switch is prolonged. When the capacitor discharges to generate reverse pulse current to turn off the first transistor T, the second secondary switch S2 can be switched off without arcing. When the current is transferred to the energy-shifting resistor, the whole overvoltage is applied to the multi-break high-speed mechanical switch to protect the diode bridge arm circuit.
The solid-state circuit breaker is formed by connecting a forward power electronic device valve bank and a reverse power electronic device valve bank in series, and each group of power electronic devices is connected with a diode valve bank in parallel in a reverse direction. The power electronic device adopts any one of high-power electronic devices such as IGCT, IGBT and the like. In the future, the Tokamak device can be operated in a four-quadrant circulating current mode, so that the bidirectional turn-off can be realized without judging the current direction.
The explosion switch of the invention is required to meet the rated current capacity in a normal working state, is used as a backup protection switch and is connected in series behind the multi-fracture high-speed mechanical switch and the solid-state circuit breaker, when a certain branch fails, the explosive is detonated, and the current is rapidly transferred to the branch where the energy-transfer resistor is located. The energy-shifting resistor of the energy-shifting resistor branch circuit can absorb the energy storage of the superconducting coil when the superconducting coil loses time, and the coil is protected from being damaged.
As shown in fig. 3, the normal on-off process of the quench protection switch of the magnet power system of the high-power tokamak device of the present invention:
1) when the system normally operates, the multi-fracture high-speed mechanical switch bears steady-state current and flows through the explosion switch connected with the multi-fracture high-speed mechanical switch in series;
2) at the moment of T1, when the system detects a quench signal, a command of opening a first secondary switch S1 of the multi-break high-speed mechanical switch is sent out immediately, an arc voltage is generated at the first secondary switch S1, a diode bridge arm is conducted in a corresponding voltage direction (bidirectional), a first crystal-breaking tube T is conducted, and current begins to be transferred to the first crystal-breaking tube T;
3) at the time T2, finishing primary current conversion, and completely transferring the current to the first crystal smashing tube T;
4) at the time T3, after the first secondary switch S1 completes the recovery of the insulating medium, the second thyristor T1 is turned on, the pre-charge capacitor C discharges through the inductor L, a reverse pulse current is generated to turn off the first thyristor T, and a solid-state breaker turn-on command is sent at the same time;
5) at the time T4, the first crystal smashing tube T is completely turned off, the second secondary switch S2 rapidly realizes zero-current arc-free on-off, the secondary current conversion is finished, and the current is completely transferred to the solid-state circuit breaker;
6) at the time t5, when the contact of the second secondary switch S2 is disconnected to a rated opening distance with a certain insulation voltage-resistant grade, the system sends a solid-state breaker turn-off command, and current starts to be transferred to the energy-transfer resistance branch;
7) at time t6, three commutations are completed, the solid-state circuit breaker is completely turned off, all current is transferred to the energy-shifting resistor, the magnet current begins to rapidly drop, and electromagnetic energy is rapidly consumed by the energy-shifting resistor.
In combination with the fault switching-on and switching-off process of the quench protection switch of the magnet power supply system of the high-power Tokamak device, when a mechanical switch branch or a solid-state circuit breaker branch breaks down, the explosion switch detonates explosive, the current of a main loop is quickly and effectively switched off, and under the action of high voltage, the current is transferred to the energy transfer resistor, so that a multi-fracture high-speed mechanical switch or a solid-state circuit breaker is protected.
The quench protection switch provided by the invention adopts a three-level current-carrying branch, and through four times of current conversion, the low-loss current-carrying capacity of the mechanical switch and the quick turn-off capacity of the solid-state switch are effectively combined, and the characteristics of bidirectional current turn-off, arc-free turn-off of the mechanical switch and the like can be realized.
Claims (7)
1. A quench protection switch for a magnet power system of a high-power Tokamak device is characterized in that: the high-speed mechanical switch with the multi-fracture surface, the first crystal-breaking tube T, the artificial current zero circuit and the diode bridge arm form a primary current-carrying branch, the solid-state circuit breaker connected with the primary current-carrying branch in parallel serves as a secondary current-carrying branch, the energy-shifting resistor connected with the primary current-carrying branch and the secondary current-carrying branch in parallel serves as a tertiary current-carrying branch, and the explosion switch serving as a backup protection unit is connected with the primary current-carrying branch and the secondary current-carrying branch in series.
2. The high power tokamak device magnet power system quench protection switch of claim 1, further comprising: the multi-break high-speed mechanical switch comprises two secondary switches S1 and S2 which are connected in series, a first secondary switch S1 is connected with a diode bridge arm circuit in parallel, the diode bridge arm circuit is composed of a first transistor T, an artificial current zero circuit and a diode bridge arm, and the artificial current zero circuit is composed of a pre-charging capacitor C, an inductor L and a second transistor T1 which are connected in series.
3. The high power tokamak device magnet power system quench protection switch of claim 2, further comprising: the first crystal smashing pipe T and the second crystal smashing pipe T1 are respectively formed by connecting a plurality of crystal smashing pipe branches in parallel, and each crystal smashing pipe branch is formed by connecting a plurality of crystal smashing pipes in series; each diode bridge arm branch is formed by connecting a plurality of diode branches in parallel, and each diode branch is formed by connecting a plurality of diodes in series.
4. The high power tokamak device magnet power system quench protection switch of claim 1, further comprising: the multi-fracture high-speed mechanical switch comprises a fixed contact, an auxiliary contact and a movable contact which are arranged in front, middle and rear, wherein the contact material is silver, the contact modes are all line contact, a high-melting-point contact is arranged as an arc contact, and a circulating water cooling system is arranged.
5. The high power tokamak device magnet power system quench protection switch of claim 1, further comprising: the solid-state circuit breaker is formed by connecting a forward power electronic device valve bank and a reverse power electronic device valve bank in series, and each group of power electronic devices is connected with a diode valve bank in parallel in a reverse direction.
6. The high power tokamak device magnet power system quench protection switch of claim 5, wherein: the power electronic device valve bank is formed by connecting a plurality of power electronic device branches in parallel, and each power electronic device branch is formed by connecting a plurality of power electronic devices in series.
7. The high power tokamak device magnet power system quench protection switch of claim 5, wherein: the diode valve bank is formed by connecting a plurality of diode branches in parallel, and each diode branch is formed by connecting a plurality of diodes in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010502549.6A CN111541222B (en) | 2020-06-05 | 2020-06-05 | High-power tokamak device magnet power supply system quench protection switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010502549.6A CN111541222B (en) | 2020-06-05 | 2020-06-05 | High-power tokamak device magnet power supply system quench protection switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111541222A true CN111541222A (en) | 2020-08-14 |
| CN111541222B CN111541222B (en) | 2022-06-17 |
Family
ID=71980760
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010502549.6A Active CN111541222B (en) | 2020-06-05 | 2020-06-05 | High-power tokamak device magnet power supply system quench protection switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111541222B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112736841A (en) * | 2020-12-28 | 2021-04-30 | 南京工程学院 | Hybrid direct-current switch for full-superconducting Tokamak quench protection |
| CN113097026A (en) * | 2021-04-06 | 2021-07-09 | 中国科学院合肥物质科学研究院 | Multi-voltage adjustable blasting circuit breaker for fusion reactor host |
| CN113257597A (en) * | 2021-06-17 | 2021-08-13 | 清华大学 | Hybrid direct current breaker based on composite current conversion mode and control method thereof |
| CN114551187B (en) * | 2022-01-28 | 2023-10-13 | 中国科学院合肥物质科学研究院 | Direct current breaker of fusion device quench protection system |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040027737A1 (en) * | 2001-09-25 | 2004-02-12 | Minfeng Xu | Balanced quench protection circuit |
| CN1901311A (en) * | 2006-07-19 | 2007-01-24 | 中国科学院等离子体物理研究所 | High power abnormal and over protective switch based on thyrister |
| CN101414181A (en) * | 2008-11-25 | 2009-04-22 | 天水电气传动研究所有限责任公司 | Superconducting magnet quench protection integrated control interface unit |
| CN102005750A (en) * | 2010-12-14 | 2011-04-06 | 东南大学 | Composite superconductive fault current-limiting device with self-protection function |
| CN102214911A (en) * | 2011-05-27 | 2011-10-12 | 中国科学院电工研究所 | Superconducting magnet quenching protection device |
| CN103337851A (en) * | 2013-07-04 | 2013-10-02 | 国家电网公司 | Semi-controlled active injection current high voltage direct current breaker and realization method thereof |
| CN104767170A (en) * | 2014-01-06 | 2015-07-08 | 国家电网公司 | Mixed high-voltage direct-current circuit breaker and realization method thereof |
| CN105356435A (en) * | 2015-12-10 | 2016-02-24 | 西安交通大学 | Bidirectional-breaking bridge-type circuit breaker and application method thereof |
| CN106206208A (en) * | 2016-07-26 | 2016-12-07 | 中国科学院等离子体物理研究所 | The hybrid dc circuit breaker that great power bidirectional cut-offs |
| CN109378251A (en) * | 2018-09-17 | 2019-02-22 | 中国科学院合肥物质科学研究院 | Explosion switch for Superconducting tokamak nuclear fusion experimental power supply for magnet coils system |
| CN110048389A (en) * | 2019-05-29 | 2019-07-23 | 华北电力大学 | The hybrid DC Line Fault current limiter topology of current commutation H bridge type |
| US20190252104A1 (en) * | 2016-10-31 | 2019-08-15 | Tokamak Energy Ltd. | Quench protection in high-temperature superconducting magnets |
-
2020
- 2020-06-05 CN CN202010502549.6A patent/CN111541222B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040027737A1 (en) * | 2001-09-25 | 2004-02-12 | Minfeng Xu | Balanced quench protection circuit |
| CN1901311A (en) * | 2006-07-19 | 2007-01-24 | 中国科学院等离子体物理研究所 | High power abnormal and over protective switch based on thyrister |
| CN101414181A (en) * | 2008-11-25 | 2009-04-22 | 天水电气传动研究所有限责任公司 | Superconducting magnet quench protection integrated control interface unit |
| CN102005750A (en) * | 2010-12-14 | 2011-04-06 | 东南大学 | Composite superconductive fault current-limiting device with self-protection function |
| CN102214911A (en) * | 2011-05-27 | 2011-10-12 | 中国科学院电工研究所 | Superconducting magnet quenching protection device |
| CN103337851A (en) * | 2013-07-04 | 2013-10-02 | 国家电网公司 | Semi-controlled active injection current high voltage direct current breaker and realization method thereof |
| CN104767170A (en) * | 2014-01-06 | 2015-07-08 | 国家电网公司 | Mixed high-voltage direct-current circuit breaker and realization method thereof |
| CN105356435A (en) * | 2015-12-10 | 2016-02-24 | 西安交通大学 | Bidirectional-breaking bridge-type circuit breaker and application method thereof |
| CN106206208A (en) * | 2016-07-26 | 2016-12-07 | 中国科学院等离子体物理研究所 | The hybrid dc circuit breaker that great power bidirectional cut-offs |
| US20190252104A1 (en) * | 2016-10-31 | 2019-08-15 | Tokamak Energy Ltd. | Quench protection in high-temperature superconducting magnets |
| CN109378251A (en) * | 2018-09-17 | 2019-02-22 | 中国科学院合肥物质科学研究院 | Explosion switch for Superconducting tokamak nuclear fusion experimental power supply for magnet coils system |
| CN110048389A (en) * | 2019-05-29 | 2019-07-23 | 华北电力大学 | The hybrid DC Line Fault current limiter topology of current commutation H bridge type |
Non-Patent Citations (2)
| Title |
|---|
| 李华等: "核聚变装置中直流保护开关的研究进展", 《中国电机工程学报》 * |
| 白小龙: "聚变装置磁体电源系统直流开关技术研究", 《中国优秀硕士学位论文全文数据库 工程科技II辑》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112736841A (en) * | 2020-12-28 | 2021-04-30 | 南京工程学院 | Hybrid direct-current switch for full-superconducting Tokamak quench protection |
| CN113097026A (en) * | 2021-04-06 | 2021-07-09 | 中国科学院合肥物质科学研究院 | Multi-voltage adjustable blasting circuit breaker for fusion reactor host |
| CN113097026B (en) * | 2021-04-06 | 2023-12-19 | 中国科学院合肥物质科学研究院 | Multi-voltage adjustable blasting circuit breaker for fusion reactor host |
| CN113257597A (en) * | 2021-06-17 | 2021-08-13 | 清华大学 | Hybrid direct current breaker based on composite current conversion mode and control method thereof |
| CN114551187B (en) * | 2022-01-28 | 2023-10-13 | 中国科学院合肥物质科学研究院 | Direct current breaker of fusion device quench protection system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111541222B (en) | 2022-06-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111541222B (en) | High-power tokamak device magnet power supply system quench protection switch | |
| KR101968459B1 (en) | DC current interrupter and its control method | |
| CN106207953B (en) | High-power hybrid direct current circuit breaker | |
| CN112510647B (en) | Direct current breaker combining oscillation transfer and solid-state switch | |
| CN109861183B (en) | Direct current breaker and using method thereof | |
| CN106206208A (en) | The hybrid dc circuit breaker that great power bidirectional cut-offs | |
| CN111478280A (en) | Solid-state direct current breaker based on capacitance commutation | |
| CN111030042A (en) | Passive semi-control hybrid direct current breaker and control method thereof | |
| CN113394760B (en) | Current pre-limiting type high-voltage direct current fault current limiter based on capacitance commutation and method | |
| CN111404113B (en) | T-shaped direct current breaker and control method thereof | |
| CN102779667B (en) | On-load tap-changer | |
| CN115241850A (en) | Combined high-voltage direct-current circuit breaker and control strategy thereof | |
| CN112803357A (en) | Direct current breaker based on combination of current limiting and oscillation transfer and control method thereof | |
| CN112865042A (en) | Controllable voltage source oscillation type direct current breaker and application method thereof | |
| CN111030076B (en) | Control method of bidirectional mixed medium-voltage direct-current load switch | |
| CN110401174B (en) | Main circuit topology of medium-voltage direct-current vacuum circuit breaker and breaking method thereof | |
| CN110311354B (en) | Medium-voltage high-capacity hybrid direct-current circuit breaker and current-limiting breaking method | |
| CN110112709B (en) | Direct current breaker and method for pre-charging by using system direct current voltage | |
| CN116613712A (en) | Low-voltage direct-current hybrid circuit breaker based on thyristors and control method thereof | |
| CN111614068A (en) | Bidirectional cut-off current-limiting type hybrid direct current breaker | |
| CN216215874U (en) | Direct current breaker | |
| CN207572949U (en) | A kind of two-way no camber mixed DC breaker | |
| CN115528659A (en) | Direct current breaker with automatic and controllable turn-off capability and use method thereof | |
| CN111740389B (en) | High breaking performance direct current breaker suitable for reclosing | |
| CN114421420A (en) | Resistance-inductance current-limiting type multi-port direct-current circuit breaker suitable for flexible direct-distribution power grid |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |