CN113394742B - Bidirectional bridge type direct current solid-state circuit breaker - Google Patents
Bidirectional bridge type direct current solid-state circuit breaker Download PDFInfo
- Publication number
- CN113394742B CN113394742B CN202110640823.0A CN202110640823A CN113394742B CN 113394742 B CN113394742 B CN 113394742B CN 202110640823 A CN202110640823 A CN 202110640823A CN 113394742 B CN113394742 B CN 113394742B
- Authority
- CN
- China
- Prior art keywords
- capacitor
- thyristor
- inductor
- anode
- circuit
- 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.)
- Active
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
Landscapes
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
本发明公开了一种双向桥式直流固态断路器，该断路器拓扑结构包括第一晶闸管、第二晶闸管、第一电容、第二电容、第三电容、第四电容以及第一电感、第二电感,可以应用于直流微电网中，实现系统的短路故障保护，该断路器拓扑结构简单，既满足实际应用中的共地要求，又能实现能量的双向流动，可以实现对直流系统进行双向保护，同时减少了电力电子器件的使用，降低了通态损耗。
The invention discloses a bidirectional bridge type DC solid-state circuit breaker. The circuit breaker topological structure includes a first thyristor, a second thyristor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a first inductance, a second Inductance can be used in DC microgrid to realize short-circuit fault protection of the system. The circuit breaker has a simple topology, which not only meets the requirements of common ground in practical applications, but also realizes the bidirectional flow of energy, which can realize bidirectional protection of the DC system. , while reducing the use of power electronic devices and reducing the on-state loss.
Description
The technical field is as follows:
the invention belongs to the field of direct-current solid-state circuit breakers, and particularly relates to a novel bidirectional bridge type direct-current solid-state circuit breaker topological structure.
Background art:
with the continuous development of the direct current micro-grid, the application range of the direct current micro-grid is also continuously expanded, so that higher requirements are provided for the steady-state operation of the direct current micro-grid, the safety protection of the direct current micro-grid and the like. The circuit breaker is an important device for guaranteeing the steady-state operation of the power system, and the direct-current circuit breaker plays an important role in direct-current power transmission protection and provides powerful guarantee for the reliable operation of the direct-current system.
With the rapid development of power electronic devices, especially semiconductor devices, an all-solid-state dc circuit breaker using the power electronic device as a main switch has received much attention due to its advantages of rapid fault isolation, high reliability, and the like, and various dc solid-state circuit breaker structures have appeared. For example, a common Z-source direct-current solid-state circuit breaker has a simple topological structure and few used devices, can realize common grounding of a power supply and a load, can realize fault isolation without an additional detection and control circuit, but still has the defect of high on-state loss, and simultaneously has the problems that the switching speed needs to be further improved, and the like, and needs to be continuously optimized and the performance needs to be improved. Although the bridge type solid-state dc circuit breaker proposed in chinese patent (CN201810122692.5) has the advantages of simple switching process and short time, it needs additional control circuit, which increases the complexity of the circuit. Therefore, a new bidirectional bridge type dc solid-state circuit breaker is urgently needed.
Disclosure of Invention
Aiming at the defects and shortcomings of the existing direct current solid-state circuit breaker, the invention provides a bidirectional bridge type direct current solid-state circuit breaker which can meet the requirement that a power supply and a load share the same ground in practical application, can realize bidirectional flow of energy, has a bidirectional protection effect on a circuit, has a simple topological structure, does not need an additional detection control circuit, and has the characteristics of accurate and rapid fault isolation and the like.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a bidirectional bridge dc solid state circuit breaker comprising: the circuit comprises a first thyristor (1), a second thyristor (2), a first capacitor (3), a second capacitor (4), a third capacitor (5), a fourth capacitor (6), a first inductor (7) and a second inductor (8); the anode of the first thyristor (1) is connected with the anode of the first capacitor (3); the cathode of the first thyristor (1) and the first inductor (7) are connected to a first connection point (11); the negative electrode of the first capacitor (3) and the first inductor (7) are connected to a first leading-out terminal (9); the anode of the second thyristor (2) is connected with the anode of the second capacitor (4); the cathode of the second thyristor (2) and the second inductor (8) are connected to a second connection point (12); the negative electrode of the second capacitor (4) and the second inductor (8) are connected to a second leading-out terminal (17); the anode of the third capacitor (5) is connected with the anode of the first thyristor (1); the negative electrode of the third capacitor (5) is used as a third leading-out terminal (14); the positive electrode of the fourth capacitor (6) is connected with the anode of the second thyristor (2); the negative electrode of the fourth capacitor (6) is used as a fourth leading-out terminal (15); the first leading terminal (9) is connected with the positive electrode of a power supply (23), the negative electrode of the power supply (23) is connected with the third leading terminal (14), the fourth leading terminal (15), and the fourth leading terminal (15) is connected with a short-circuit point (18), so that a current loop is formed.
The system further comprises: a first energy absorbing circuit and a second energy absorbing circuit; the first inductor (7) is connected with a first energy absorption loop, the second inductor (8) is connected with a second energy absorption loop, the anode of a first diode (24) is connected with one end of a first resistor (25), the cathode of the first diode (24) is connected with one end of the first inductor (7), and the other end of the resistor (25) is connected with the other end of the first inductor (7), so that the energy absorption loop of the first inductor (7) is formed; the anode of the second diode (27) is connected with the second resistor (26), the cathode of the second diode (27) is connected with one end of the second inductor (8), the other end of the second resistor (26) is connected with the second inductor (8), so that an energy absorption loop of the second inductor (8) is formed, and the energy absorption loop plays a role of energy buffering when the inductor discharges
The bidirectional flow of energy is realized through the first thyristor (1) and the second thyristor (2) which are connected in parallel in opposite directions; when the load has short-circuit fault, the thyristor is turned off by discharging the first capacitor (3), the second capacitor (4), the third capacitor (5) and the fourth capacitor (6), so that the fault isolation effect is completed.
The invention has the following beneficial effects:
in terms of circuit structure, the circuit breaker is simple in topological structure, the common ground requirement of a power supply and a load can be realized by using a small number of elements, and meanwhile, a detection control circuit is not required to be additionally arranged, so that the circuit breaker is small in energy requirement, high in reliability and low in cost;
in the aspect of on-state loss, the direct current solid-state circuit breaker adopts the capacitor to replace the reverse blocking effect of the diode, so that the use of semiconductor devices is reduced, and the on-state loss of a system is reduced.
From the short-circuit fault protection effect, the first thyristor and the second thyristor which are connected in parallel in the reverse direction form a bidirectional bridge circuit, bidirectional flow of energy can be achieved, the first capacitor, the second capacitor, the third capacitor and the fourth capacitor discharge in a transient state, current reversely passes through the thyristor, the thyristor is turned off, and the bidirectional protection effect on the circuit is achieved.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above description and other objects, features, and advantages of the present invention more clearly understandable, preferred embodiments are specifically described below.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a circuit topology structure diagram of the present invention
FIG. 2 is a voltage waveform diagram of positive electrode discharge voltage of the first capacitor and the third capacitor during the simulation load short circuit fault
FIG. 3 is a graph of the current and voltage waveforms of the second thyristor during the short-circuit fault of the artificial analog load
FIG. 4 is a graph of the load current and voltage waveforms during the simulation of the short-circuit fault of the load
In fig. 1, 1-first thyristor, 2-second thyristor, 3-first capacitor, 4-second capacitor, 5-third capacitor, 6-fourth capacitor, 7-first inductor, 8-second inductor, 23-power supply, 24-first diode, 27-second diode, 25-first resistor, 26-second resistor, 9-first leading-out terminal, 17-second leading-out terminal, 14-third leading-out terminal, 15-fourth leading-out terminal, 11-first connection point, 12-second connection point
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be connected or detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
As shown in fig. 1, the present invention provides a bidirectional bridge type dc solid-state circuit breaker, which includes a photovoltaic module 3, an anode of a first thyristor 1 is connected to a positive electrode of a first capacitor 3 and a positive electrode of a third capacitor 5, and a cathode thereof is connected to a first inductor 7; the negative electrode of the first capacitor 3 is connected with the first inductor 7, and the connection point of the first capacitor is used as a first leading-out terminal 9; the anode of the second thyristor 2 is connected with the anode of the second capacitor 4 and the anode of the fourth capacitor 6, and the cathode of the second thyristor is connected with the second inductor 8; the negative electrode of the second capacitor 4 is connected with the second inductor 8, and the connection point of the second capacitor is used as a second leading-out terminal 17; the negative electrode of the third capacitor 5 serves as a third leading-out terminal 14; the negative electrode of the fourth capacitor 6 serves as a fourth leading-out terminal 15; the first lead-out terminal is connected with the positive electrode of the power supply 23, the negative electrode of the power supply 23 is connected with the third lead-out terminal and the fourth lead-out terminal, and the fourth lead-out terminal is connected with the short-circuit point, so that a current loop is formed. The anode of the diode 24 is connected with the resistor 25 and then connected in parallel with the two ends of the first inductor 7 to form an energy absorption loop of the first inductor; the anode of the diode 27 is connected to the resistor 26 and then connected in parallel to the two ends of the second inductor 8, so as to form an energy absorption loop of the second inductor 8.
The bidirectional bridge type direct current solid-state circuit breaker provided by the invention realizes bidirectional flow of energy mainly through the first thyristor 1 and the second thyristor 2 which are connected in anti-parallel. The forward energy flow path is that the energy flows through the first inductor 7, passes through the second thyristor 2, and then flows through the second inductor 8 to be transmitted to the other end of the circuit. The backward energy flow path is that the energy flows through the second inductor 8, passes through the first thyristor 1 and then flows through the first inductor 7 to be transmitted to the other end of the circuit.
The specific working process of the bidirectional bridge type direct current solid-state circuit breaker provided by the invention is described as follows:
when energy flows forward and the circuit is in a normal working state, the first capacitor 3, the second capacitor 4, the third capacitor 5 and the fourth capacitor 6 are equivalent to open circuits; the first inductor 1 and the second inductor 8 are equivalent to short circuits. The current flows through the first inductor 1, the second thyristor 2 and the second inductor 8 to be transmitted to the load. When the load suddenly generates a short-circuit fault, at the transient moment, the inductive current cannot suddenly change, the current direction of the inductive current is the same as that of the inductive current in a steady state, the discharging currents of the first capacitor 3 and the third capacitor 5 reversely flow through the second thyristor 2, and when the reverse current flowing through the second thyristor 2 is larger than the forward current, the anode voltage of the thyristor is lower than the cathode voltage, so that the thyristor is switched off, and the fault isolation effect is completed.
When energy flows backwards and the circuit is in a normal working state, the first capacitor 3, the second capacitor 4, the third capacitor 5 and the fourth capacitor 6 are equivalent to open circuits; the first inductor 8 and the second inductor 1 correspond to a short circuit. The current flows through the second inductor 8, the first thyristor 1 and the first inductor 7 to be transmitted to the load; when the load suddenly generates a short-circuit fault, at the transient moment, the current of the inductor can not suddenly change, the current direction is the same as that in the steady state, the discharging current of the second capacitor 4 and the fourth capacitor 6 reversely flows through the first thyristor 1, and when the reverse current flowing through the first thyristor 1 is larger than the forward current, the anode voltage of the thyristor is lower than the cathode voltage, so that the thyristor is turned off, and the fault isolation effect is completed.
Simulation experiments are carried out in Saber software for an example, the bidirectional bridge type direct current solid-state circuit breaker provided by the invention is verified, and the simulation experiments and results of energy forward flow are introduced. Setting a supply voltage Us1000V, the first capacitor 3, the second capacitor 4, the third capacitor 5, the fourth capacitor 6 are all 47uF, the first inductor 7, the second inductor 8 are all 1.3mH, the load resistance is set to 20 Ω, and the short-circuit fault resistance is 0.1 Ω. The experimental waveforms are shown in FIGS. 2-4Shown in the figure.
In the simulation test, the simulated load short-circuit fault occurs when t is 0.3 s.
As can be seen from fig. 2, when the load has a short-circuit fault, the first capacitor 3 and the third capacitor 5 are discharged simultaneously, and the voltage of the positive electrode thereof decreases. As can be seen from fig. 3, the voltage across the second thyristor 2, which is normally turned on in the steady state, drops to negative at this time, and is maintained for a period of time, and the thyristor is turned off.
As can be seen from fig. 4, the load voltage drops from 1000V at normal operation to 0V and the load current drops from 50A at normal operation to 0A within about 0.1 ms. The simulation verifies that the thyristor can be turned off in time under the fault state, the breaker can quickly isolate the short-circuit fault, and the safe work of the circuit is maintained.
The invention has the advantages that: the circuit breaker has a simple topological structure, few used elements, high reliability and low cost, realizes the common ground requirement of a power supply and a load, and does not need an additional detection control circuit; the direct current solid-state circuit breaker adopts a capacitor to replace the reverse blocking effect of a diode, reduces the use of semiconductor devices and reduces the on-state loss of a system. The first thyristor and the second thyristor which are connected in inverse parallel form a bidirectional bridge circuit, bidirectional flow of energy can be achieved, the first capacitor, the second capacitor, the third capacitor and the fourth capacitor discharge in a transient state, current reversely passes through the thyristor, the thyristor is turned off, and bidirectional protection of the circuit is achieved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110640823.0A CN113394742B (en) | 2021-06-08 | 2021-06-08 | Bidirectional bridge type direct current solid-state circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110640823.0A CN113394742B (en) | 2021-06-08 | 2021-06-08 | Bidirectional bridge type direct current solid-state circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113394742A CN113394742A (en) | 2021-09-14 |
| CN113394742B true CN113394742B (en) | 2022-04-26 |
Family
ID=77618711
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110640823.0A Active CN113394742B (en) | 2021-06-08 | 2021-06-08 | Bidirectional bridge type direct current solid-state circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113394742B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023283109A1 (en) * | 2021-07-09 | 2023-01-12 | S&C Electric Company | Series z-source circuit breaker with pulse-testing capability |
| CN113949303B (en) * | 2021-10-22 | 2024-09-24 | 宜宾职业技术学院 | A transformerless Z-source grid-connected inverter based on coupled inductor |
| CN114094549B (en) * | 2021-11-19 | 2022-12-06 | 西北工业大学 | Two-way Z source direct current solid state circuit breaker based on H bridge structure |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101522412B1 (en) * | 2013-12-26 | 2015-05-26 | 주식회사 효성 | Bi-directional DC interruption device |
| CN105281289A (en) * | 2015-11-20 | 2016-01-27 | 中国船舶重工集团公司第七一二研究所 | Bidirectional combined type direct current breaker and control method thereof |
| CN207572949U (en) * | 2017-11-24 | 2018-07-03 | 哈尔滨理工大学 | A bidirectional arc-free hybrid DC circuit breaker |
| CN108599117A (en) * | 2018-05-11 | 2018-09-28 | 西北工业大学 | A kind of bidirectional, dc solid circuit breaker |
| CN110492876A (en) * | 2019-07-17 | 2019-11-22 | 西北工业大学 | A Bidirectional DC Solid State Circuit Breaker Based on Coupled Inductors |
| CN112838562A (en) * | 2021-01-08 | 2021-05-25 | 西北工业大学 | A bidirectional Z-source solid-state DC circuit breaker based on a novel topology |
-
2021
- 2021-06-08 CN CN202110640823.0A patent/CN113394742B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101522412B1 (en) * | 2013-12-26 | 2015-05-26 | 주식회사 효성 | Bi-directional DC interruption device |
| CN105281289A (en) * | 2015-11-20 | 2016-01-27 | 中国船舶重工集团公司第七一二研究所 | Bidirectional combined type direct current breaker and control method thereof |
| CN207572949U (en) * | 2017-11-24 | 2018-07-03 | 哈尔滨理工大学 | A bidirectional arc-free hybrid DC circuit breaker |
| CN108599117A (en) * | 2018-05-11 | 2018-09-28 | 西北工业大学 | A kind of bidirectional, dc solid circuit breaker |
| CN110492876A (en) * | 2019-07-17 | 2019-11-22 | 西北工业大学 | A Bidirectional DC Solid State Circuit Breaker Based on Coupled Inductors |
| CN112838562A (en) * | 2021-01-08 | 2021-05-25 | 西北工业大学 | A bidirectional Z-source solid-state DC circuit breaker based on a novel topology |
Non-Patent Citations (1)
| Title |
|---|
| 一种基于Z源的双向直流固态断路器_于春风;于春风等;《电气工程学报》;20200630;第15卷(第2期);第34-40页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113394742A (en) | 2021-09-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113394742B (en) | Bidirectional bridge type direct current solid-state circuit breaker | |
| CN102522882B (en) | Protection circuit of converter power component | |
| CN101340185B (en) | Synchronous control method of 3 phase AC solid power controller | |
| CN115000919B (en) | Bidirectional direct current solid-state circuit breaker based on thyristor and control method thereof | |
| CN103646805B (en) | A kind of direct-current breaker topology | |
| CN108599117A (en) | A kind of bidirectional, dc solid circuit breaker | |
| WO2015081615A1 (en) | Direct-current circuit breaker | |
| CN115102135B (en) | A low-loss bidirectional DC solid-state circuit breaker based on thyristor and control method thereof | |
| CN103457256B (en) | A kind of MTDC transmission system DC circuit breaker and control method thereof | |
| CN109889028A (en) | A kind of Absorption Capacitance pre-charge circuit and peak voltage absorbing circuit | |
| CN106024497B (en) | Auxiliary circuit for high-short-circuit turn-off direct-current circuit breaker and control method thereof | |
| CN104009450B (en) | Block combiner high voltage DC breaker | |
| CN103441489A (en) | Direct-current breaker used for multi-terminal direct current system and control method of direct-current breaker | |
| CN100382217C (en) | Commutation device of hybrid soft-off current-limiting circuit breaker | |
| CN110429562A (en) | Hybrid high voltage DC breaker and its control method based on normal open type SIC device | |
| CN109361202B (en) | A current injection circuit breaker | |
| CN118487582A (en) | Short-circuit protection circuit of MOS (metal oxide semiconductor) tube and control method thereof | |
| CN109962462A (en) | A bidirectional current blocking circuit for DC power grid based on series switch | |
| CN206619906U (en) | A kind of dc circuit breaker | |
| CN110518545B (en) | Hybrid high-voltage direct-current circuit breaker based on bidirectional current limiting module | |
| CN113394741B (en) | Protection method for DC power supply system of multi-electric aircraft | |
| CN113852051B (en) | Direct-current solid-state circuit breaker with bidirectional switching-on and switching-off and soft starting functions and control method | |
| CN201142562Y (en) | Short circuit fault current limiter with adjustable impedance | |
| CN106655746A (en) | Buffer circuit suitable for hybrid high-voltage DC breaker bidirectional parallel load commutation switch | |
| CN114094549B (en) | Two-way Z source direct current solid state circuit breaker based on H bridge structure |
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 |