CN112838561A - Resistance-capacitance type hybrid direct current breaker based on coupling reactor - Google Patents
Resistance-capacitance type hybrid direct current breaker based on coupling reactor Download PDFInfo
- Publication number
- CN112838561A CN112838561A CN202110015677.2A CN202110015677A CN112838561A CN 112838561 A CN112838561 A CN 112838561A CN 202110015677 A CN202110015677 A CN 202110015677A CN 112838561 A CN112838561 A CN 112838561A
- Authority
- CN
- China
- Prior art keywords
- current
- branch
- resistance
- circuit
- power electronic
- 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.)
- Pending
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
- H02H3/087—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current for dc applications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
A resistance-capacitance type hybrid direct current breaker based on a coupling reactor mainly comprises the coupling reactor (a), a vacuum switch branch circuit (b) and a transfer branch circuit. Coupling reactor primary and secondary winding (L)1、L2) Are respectively connected in series with the main branch and the vacuum switch branch, and the transfer branch comprises an IGBT and a buffer circuit (R)0C0D0) The IGBT and the buffer circuit are connected in parallel to form a power electronic unit, the resistance-capacitance element is connected with the power electronic unit in series, the diode bridge circuit is mainly used for breaking bidirectional fault current, and the zinc oxide arrester is used for absorbing energy of the broken power electronic unit. The value ranges of the primary winding and the secondary winding of the coupling reactor are respectively 250-300 muH and 50-100 muH, the coupling coefficient ranges from 0.95-0.98, and the value ranges of the resistance-capacitance parameter R, C are respectively 0.1-0.25 omega and 20-50 muF. The main controller detects the current, voltage and other electricity of each branch circuitAnd state information such as parameters, switch states, ambient temperature and the like realizes intelligent control of the whole machine. The coupling reactor with the structure can accelerate the current transfer process between the vacuum switch and the transfer branch, the resistance-capacitance element is used for limiting the current peak value of the power electronic unit so as to reduce the rated current value of the selected IGBT, and further reduce the cost.
Description
The technical field is as follows:
the invention belongs to the technical field of medium-voltage direct-current circuit breakers, and particularly relates to a coupling reactor-based resistance-capacitance type hybrid direct-current circuit breaker.
Background art:
the direct current breaker is used as an important device for controlling and protecting the urban rail transit power supply system, the safe and reliable operation of the urban rail transit power supply system is guaranteed, the short-circuit current of the current direct current traction power supply system can reach dozens of kiloamperes, the current rising rate is high, and the high-performance rapid breaking direct current breaker is a research hotspot in the field.
At present, much research on a hybrid direct current circuit breaker is carried out at home and abroad, and a 120kV/7.5kA hybrid direct current circuit breaker is developed by an Alstom formula in 2014; in 2015, a 200kV/12kA mixed direct-current circuit breaker prototype was developed by national intelligent power grid research institute; in 2016, the Nanrui continuous research develops a 500kV/25kA high-capacity hybrid direct-current circuit breaker; a4 kV/1.5kA hybrid direct-current circuit breaker combining a quick switch and an IGCT is designed by Jean-Marc Meyer et al in Sweden 2006; A270V hybrid direct-current circuit breaker prototype was researched by Beijing aerospace university in 2017, and a 400V/450A hybrid direct-current circuit breaker scheme was proposed by Shanghai electric group in 2018. The direct-current short-circuit fault current of the rail transit can reach 100kA, the current rise rate can reach more than 10kA/ms, the traditional air direct-current circuit breaker has the problems of long on-off time, short electrical service life and the like, and the conventional hybrid direct-current circuit breaker has the problems of higher cost, slow natural current conversion and transfer process in the large-current on-off process, long energy consumption time of a lightning arrester and the like. The resistance-capacitance type hybrid direct current circuit breaker based on the coupling reactor can limit the fault current rise rate, improve the current transfer reliability, reduce the residual energy of a system absorbed by the lightning arrester and shorten the fault current clearing time of the lightning arrester.
The invention content is as follows:
in view of the above problems, the present invention provides a coupling-based methodA resistance-capacitance type hybrid direct current breaker of a reactor mainly comprises a coupling reactor (a), a vacuum switch branch circuit (b) and a transfer branch circuit. Coupling reactor primary and secondary winding (L)1、L2) Are respectively connected in series with the main branch and the vacuum switch branch, and the transfer branch comprises an IGBT and a buffer circuit (R)0C0D0) The intelligent control system comprises a resistance-capacitance element, a diode bridge circuit and a zinc oxide arrester, wherein an IGBT and a buffer circuit are connected in parallel to form a power electronic unit, the resistance-capacitance element is connected with the power electronic unit in series, the diode bridge circuit is mainly used for breaking bidirectional fault current, the zinc oxide arrester is used for absorbing energy generated after the power electronic unit is broken, a main controller realizes the intelligent control of the whole body by detecting electrical parameters such as current and voltage of each branch circuit and state information such as switching state and environmental temperature, and the structure can accelerate the current transfer process, limit the current peak value of the power electronic unit and shorten the turn-off time of the whole machine.
Furthermore, a first coupling reactor winding and a second coupling reactor winding are respectively connected in series with the main branch and the vacuum switch branch, when the vacuum switch branch normally operates, current flows through the coupling reactor and the vacuum switch, the value ranges of the first coupling reactor winding and the second coupling winding are respectively 250-300 muH and 50-100 muH, the coupling coefficient range is 0.95-0.98, and the coupling inductor can inhibit the fault current rise rate and accelerate the current to be transferred from the vacuum switch branch to the transfer branch.
Furthermore, the transfer branch circuit adopts a bridge rectifier circuit, the current flows from left to right as positive, the current flows from right to left as negative, and the bridge circuit is composed of a diode D1、D2、D3、D4Is formed of a diode D1、D4Form a forward current branch, D2、D3The structure can realize bidirectional on-off of fault current, saves the number of power electronic devices and has high economical efficiency.
Further, a buffer branch R0C0D0Parallel connected to two ends of IGBT to form power electronic unit and buffer capacitor C020 to 30 μ F, buffer resistance R00.12-0.2 omega, a resistance-capacitance element is connected with the power electronic unit in series, and the value range of the resistance-capacitance parameter R, C is dividedThe resistance-capacitance element is respectively 0.1-0.25 omega and 20-50 muF, and is used for limiting the current peak value of the power electronic unit so as to reduce the rated current value of the selected IGBT and further reduce the cost.
The intelligent control system adopts a current sensor, a voltage sensor, a temperature sensor, a displacement sensor and the like to detect state information and carry out the coordination control of all units, when the system has a fault, firstly, the main control loop detects that the system has a fault, then the main control loop sends a brake separating signal to a vacuum switch and sends a conducting signal to an IGBT (insulated gate bipolar translator), when the fault current is completely transferred to a transfer branch circuit by the vacuum switch, the main controller calculates the current transfer time and detects whether the current of the vacuum switch crosses zero by a detection system, after the current of the vacuum switch crosses zero, the main controller calculates and judges whether the vacuum switch can bear the overvoltage generated after the power electronic device is switched off and can not generate breakdown to cause reignition, when the vacuum switch reaches a certain insulation requirement, the main control loop sends a closing signal to the power electronic device, and finally, the energy consumption branch circuit absorbs the residual energy, the whole machine completes the breaking.
The invention provides a coupling reactor-based resistor-capacitor hybrid direct current breaker topological structure, which adopts a primary winding and a secondary winding of a coupling reactor to be respectively connected in series with a main loop and a vacuum switch branch, a resistor-capacitor element to be connected in series with a transfer branch, and the transfer branch adopts a diode bridge rectifier circuit, and has the main advantages that: when a system fails, the coupling reactor can effectively inhibit the rise of fault current, accelerate the current transfer and improve the reliability of the current transfer; the bidirectional shutoff of the fault current can be realized under the same condition, the number of power electronic devices can be reduced, and the use cost is reduced; after the current is completely transferred to the transfer branch, the resistance-capacitance element can limit the current peak value of the power electronic device, absorb the energy in the system, reduce the energy of the system dissipated by the lightning arrester in a short time, shorten the time for the lightning arrester to remove fault current and prolong the service life of the lightning arrester; the topological junction has the advantages of simple structure, convenient control, suitability for fault current with high on-off rising rate and the like.
Drawings
FIG. 1 is a schematic diagram of the general structure of a coupling reactor-based RC hybrid DC circuit breaker
FIG. 2 is a schematic diagram of the positive and negative direction breaking process of the DC circuit breaker
FIG. 3 is a working schematic diagram of the short-circuit fault breaking process of the present invention
FIG. 4 is a flow chart of the intelligent control system breaking fault current according to the invention
FIG. 5 is a comparison graph of a conventional hybrid DC breaker (DCCB) and a breaking waveform of the present invention
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the implementation of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
The general structure of the present invention is shown in fig. 1, and the topology includes a coupling reactor (a), a vacuum switch (b) and a transfer branch. Coupling reactor primary and secondary winding (L)1、L2) Are respectively connected in series with the main branch and the vacuum switch branch, and the transfer branch comprises an IGBT and a buffer circuit (R)0C0D0) The intelligent power supply comprises a resistance-capacitance element, a diode bridge circuit and a zinc oxide arrester, wherein an IGBT and a buffer circuit are connected in parallel to form a power electronic unit, the resistance-capacitance element is connected with the power electronic unit in series, the diode bridge circuit is mainly used for breaking bidirectional fault current, the zinc oxide arrester is used for absorbing energy generated after the power electronic unit is broken, and a main controller realizes integral intelligent control by detecting electrical parameters such as current and voltage of each branch circuit and state information such as switching state and ambient temperature.
The topological structure of the coupling reactor-based resistance-capacitance hybrid direct-current circuit breaker can realize bidirectional breaking of fault current, wherein positive breaking and negative breaking are respectively shown in fig. 2(a) and (b), and the breaking process of the fault current is specifically analyzed by taking the positive breaking of the fault current as an example below.
Stage I: in the normal circulation stage of the system shown in fig. 3 (i), the system current passes through the coupling reactor and the vacuum switch, and in the direct current condition, the coupling reactor does not work in the system and the on-state loss is small.
And stage II: for example, after the system in fig. 3 (ii) has a fault, the fault current rises rapidly, the detection system detects the fault, the main controller system recognizes the fault and sends a tripping signal to the vacuum switch, and at the same time, the power electronic device is triggered to be turned on. Stage III: as shown in FIG. 3 (III), the current is transferred from the vacuum switch to the power electronic breaking unit, and after the power electronic switch is turned on, the fault current is transferred from the vacuum switch to the transfer branch, in the process, the inductance ratio of the primary winding to the secondary winding of the coupling reactor, and the coupling coefficient have great influence on the current transfer speed, and the coupling principle analysis shows that the larger the inductance ratio of the primary winding to the secondary winding of the coupling reactor, the higher the coupling coefficient, the shorter the transfer time, and the simulation result shows that the value range of the primary winding of the coupling reactor is 250-300 muH, the value range of the secondary winding is 50-100 muH, the value range of the coupling coefficient is 0.95-0.98, so that the current transfer time can be shortened from 1.5ms to 0.5ms, and the peak value of the transfer current is reduced from 7. The commutation reliability is improved.
Stage IV: as shown in fig. 3 (iv), the fault current is completely transferred to the transfer branch, the rc element starts to perform a current limiting function, because the resistor is an energy consumption element, the resistor can absorb energy stored in an inductor in the system besides a certain current limiting capability, thereby effectively reducing energy consumed by the arrester in the system in a short time, shortening the time for the arrester to clear the fault current, and finally releasing the energy stored in the capacitor through the resistor, wherein the value range of the R parameter of the resistor is 0.1-0.25 Ω, the value range of the C parameter of the capacitor is 20-50 μ F, according to the above parameter design, the peak value of the power electronic turn-off fault current is reduced by 48.1%, and the turn-off time of the whole machine is shortened from 5.3ms to 3.3 ms. Buffer circuit R0C0D0The buffer circuit can limit the overvoltage generated by the IGBT at the turn-off moment when the IGBT is connected in parallel with the two ends of the IGBT to form a power electronic turn-off unit, and when the buffer resistor R is used0The value range is 0.12-0.2 omega, and the buffer capacitor C0When the value range is 20-30 mu F, the overvoltage of the IGBT caused by oscillation can be avoidedAnd the damage is caused, and the service life of the IGBT is prolonged to a certain extent.
And (5) stage V: as shown in fig. 3 (v), the current is transferred from the power electronic breaking unit to the energy consumption branch, the current change rate is very large at the moment of turning off the IGBT, the overvoltage is caused to turn on the zinc oxide arrester, and the fault current is rapidly transferred to the energy consumption branch.
Stage VI: in the energy consumption stage of the arrester shown in fig. 3 (vi), after the power electronic device is disconnected, the fault current is completely transferred to the energy consumption branch, the fault current rapidly decreases, and when the system current is less than the minimum on-state current of the zinc oxide arrester, the arrester is in a high-resistance state, and the system current decreases to zero, thereby completing the disconnection. Meanwhile, in the stage, the capacitor C stores a part of energy in the previous stage and finally dissipates the energy through the resistor R, so that the process does not influence the lightning arrester to clear fault current.
The intelligent control part is as shown in fig. 4, firstly the detection system can detect the state information of the current, the switch state, the environment temperature and the like of each branch circuit in real time, when the system exceeds the set value, the system is judged to have a fault, the main control system sends a brake-off signal to the vacuum switch, the IGBT is triggered to be conducted, then the current transfer time is calculated according to the principle of the coupling reactor, after the fault current is completely transferred to the transfer branch circuit from the vacuum switch branch circuit, the main controller calculates and judges whether the vacuum switch can bear the overvoltage generated after the power electronic device is switched off and cannot be punctured to cause reignition, when the vacuum switch reaches a certain insulation requirement, the main control loop sends a switch-off signal to the power electronic device, finally, the energy consumption branch circuit absorbs the residual energy of the system, and the breaking process is.
The on-off waveform diagram of the traditional hybrid Direct Current Circuit Breaker (DCCB) is shown in fig. 5(a), and the on-off waveform diagram of the resistance-capacitance type hybrid direct current circuit breaker (MDCB) based on the coupling reactor is shown in fig. 5(b), so that the topological structure of the resistance-capacitance type hybrid direct current circuit breaker based on the coupling reactor has the advantages of inhibiting fault current, realizing rapid transfer of the fault current, reducing the peak value of the off-current of a power electronic device and shortening the off-time of the whole machine.
As described above, according to the resistance-capacitance type hybrid dc circuit breaker based on the coupling reactor, the coupling reactor can suppress fault current and accelerate the transfer of the fault current from the vacuum switch to the power electronic switching unit, so that the current transfer reliability is improved, the resistance-capacitance element can suppress the peak value of the fault current on the one hand, and can absorb the energy stored in the system inductor on the other hand, so as to shorten the time for the lightning arrester to remove the fault current.
The above embodiments and parameter ranges are merely preferred embodiments of the present invention, but the scope of the present invention is not limited thereto, and equivalent changes based on the structure should be covered by the scope of the present invention.
Claims (6)
1. A resistance-capacitance type hybrid direct current breaker based on a coupling reactor mainly comprises the coupling reactor, a vacuum switch branch and a transfer branch. Coupling reactor primary and secondary winding L1、L2Are respectively connected in series with the main branch and the vacuum switch branch, and the transfer branch comprises an IGBT and a buffer circuit R0C0D0The intelligent control system comprises a resistance-capacitance element, a diode bridge circuit and a zinc oxide arrester, wherein an IGBT (insulated gate bipolar transistor) and a buffer circuit are connected in parallel to form a power electronic unit, the resistance-capacitance element is connected with the power electronic unit in series, the diode bridge circuit is mainly used for bidirectional current breaking, the zinc oxide arrester is used for absorbing energy generated after the power electronic unit is broken, a main controller realizes the intelligent control of the whole body by detecting electrical parameters such as current and voltage of each branch circuit and state information such as switching state and environmental temperature, and the structure can accelerate the current transfer process, limit the current peak value of the power electronic unit and shorten the turn-off time of the whole machine.
2. The resistor-capacitor type hybrid direct current breaker based on the coupling reactor as claimed in claim 1, wherein the primary winding and the secondary winding of the coupling reactor are respectively connected in series with the primary branch and the vacuum switch branch, when in normal operation, current flows through the coupling reactor and the vacuum switch, the values of the primary winding and the secondary winding of the coupling reactor are respectively 250-300 muH and 50-100 muH, the coupling coefficient is 0.95-0.98, and the coupling inductor can inhibit the fault current rise rate and accelerate the current to be transferred from the vacuum switch branch to the transfer branch.
3. The RC-based hybrid DC circuit breaker of claim 1, wherein the bridge circuit is formed by a diode D with the current flowing from left to right as positive and the current flowing from right to left as negative1、D2、D3、D4Is formed of a diode D1、D4Constituting a forward current branch, D2、D3The negative current branch circuit is formed, and the circuit structure can realize bidirectional breaking of fault current.
4. The RC-based hybrid DC circuit breaker of claim 1, wherein the snubber circuit R is a snubber circuit0C0D0Parallel connected to two ends of IGBT to form power electronic unit and buffer capacitor C020 to 30 μ F, buffer resistance R0The resistance-capacitance element is 0.12-0.2 omega, the resistance-capacitance element is connected with the power electronic unit in series, the value range of the resistance-capacitance parameter R, C is respectively 0.1-0.25 omega and 20-50 muF, and the resistance-capacitance element is used for limiting the current peak value of the power electronic unit so as to reduce the rated current value of the selected IGBT and further reduce the cost.
5. The RC hybrid DC circuit breaker as claimed in claim 1, wherein the intelligent control system detects the status information by using a current sensor, a voltage sensor, a temperature sensor, a displacement sensor, etc. and performs the coordination control of each unit, when the system fails, the main control circuit detects the system failure, then the main control circuit sends a brake-off signal to the vacuum switch and sends a conducting signal to the IGBT, when the failure current is completely transferred to the transfer branch by the vacuum switch, the main controller calculates the current transfer time and detects whether the current of the vacuum switch crosses zero by the detection system, after the current of the vacuum switch crosses zero, the main controller calculates and judges whether the vacuum switch can bear the overvoltage generated after the power electronic device is turned off without breakdown to cause reignition, when the vacuum switch meets a certain insulation requirement, a main control loop sends a closing signal to the power electronic device, and finally the energy consumption branch absorbs the residual energy of the system to complete the breaking.
6. The resistance-capacitance type hybrid direct current breaker based on the coupling reactor as claimed in claim 1, characterized in that by adopting the above parameters and intelligent control, the current transfer time is shortened from 1.5ms to 0.5ms, the fault current peak value is reduced by 48.1%, and the complete machine turn-off time is shortened from 5.3ms to 3.3 ms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110015677.2A CN112838561A (en) | 2021-01-07 | 2021-01-07 | Resistance-capacitance type hybrid direct current breaker based on coupling reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110015677.2A CN112838561A (en) | 2021-01-07 | 2021-01-07 | Resistance-capacitance type hybrid direct current breaker based on coupling reactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112838561A true CN112838561A (en) | 2021-05-25 |
Family
ID=75926405
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110015677.2A Pending CN112838561A (en) | 2021-01-07 | 2021-01-07 | Resistance-capacitance type hybrid direct current breaker based on coupling reactor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112838561A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113791340A (en) * | 2021-08-31 | 2021-12-14 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | Bidirectional arc voltage measuring device and method for high-voltage direct current vacuum circuit breaker |
| CN113991619A (en) * | 2021-10-12 | 2022-01-28 | 平高集团有限公司 | Current transfer circuit and current transfer device for direct current circuit breaker |
| CN114142440A (en) * | 2021-11-19 | 2022-03-04 | 广东福德电子有限公司 | Hybrid circuit breaker based on line inductance energy self-checking, storage medium and control method thereof |
-
2021
- 2021-01-07 CN CN202110015677.2A patent/CN112838561A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113791340A (en) * | 2021-08-31 | 2021-12-14 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | Bidirectional arc voltage measuring device and method for high-voltage direct current vacuum circuit breaker |
| CN113991619A (en) * | 2021-10-12 | 2022-01-28 | 平高集团有限公司 | Current transfer circuit and current transfer device for direct current circuit breaker |
| CN114142440A (en) * | 2021-11-19 | 2022-03-04 | 广东福德电子有限公司 | Hybrid circuit breaker based on line inductance energy self-checking, storage medium and control method thereof |
| WO2023087429A1 (en) * | 2021-11-19 | 2023-05-25 | 广东福德电子有限公司 | Hybrid circuit breaker based on line inductance energy self-measurement, and storage medium thereof and control method therefor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112838561A (en) | Resistance-capacitance type hybrid direct current breaker based on coupling reactor | |
| CN104900444A (en) | Direct current (DC) breaker topology structure and DC breaker control method | |
| WO2015024509A1 (en) | High-voltage large-current direct-current circuit breaker and control method therefor | |
| CN107863761B (en) | High-voltage direct-current breaker with saturation reactor | |
| WO2014131298A1 (en) | Direct-current circuit breaker and implementation method therefor | |
| CN108448548B (en) | Combined direct current breaker based on pre-charging capacitor and control method thereof | |
| Giannakis et al. | Performance evaluation and limitations of overvoltage suppression circuits for low-and medium-voltage DC solid-state breakers | |
| CN103311903B (en) | A kind of switching device and electricity generation system thereof | |
| CN110768651B (en) | Bidirectional direct current solid-state circuit breaker based on cathode short circuit grid-controlled thyristor | |
| CN110829393A (en) | Current-limiting hybrid direct-current circuit breaker with active protection function and control method | |
| CN108766830B (en) | Coupling type high-voltage direct-current breaker | |
| CN103457257A (en) | Direct-current breaker used for multi-terminal direct-current system and control method thereof | |
| CN105552827A (en) | Impressed current transfer circuit and current transfer method thereof | |
| CN106711930A (en) | DC circuit breaker and control method thereof | |
| CN106024497B (en) | Auxiliary circuit for high-short-circuit turn-off direct-current circuit breaker and control method thereof | |
| CN111640602A (en) | Multi-fracture direct-current switch equipment with controllable transfer branch oscillation current and control method | |
| CN111146760A (en) | Hybrid direct-current circuit breaker and control method for switching on and switching off direct-current system | |
| CN115833059A (en) | Low-voltage inductive coupling type hybrid direct-current circuit breaker topology and control method | |
| CN110808730B (en) | Direct current solid-state circuit breaker based on cathode short circuit grid-controlled thyristor | |
| CN110943440A (en) | Medium-high voltage bidirectional full-solid-state direct current circuit breaker and high-potential energy supply device thereof | |
| CN113765076A (en) | Bidirectional solid-state direct-current circuit breaker based on thyristor | |
| Lu et al. | Design and analysis of a 375V/5kA solid state DC circuit breaker based on IGCT | |
| Li et al. | A new topology for current-limiting solid-state HVDC circuit breaker | |
| CN112311366A (en) | Isolated bidirectional direct current solid-state circuit breaker based on cathode short circuit grid-controlled thyristor | |
| CN110311353A (en) | A kind of current-limiting type mixed DC breaker and current limliting method for dividing |
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 |