CN117498283A - Series resonance type current limiting device based on intelligent self-driving of short-circuit fault current - Google Patents
Series resonance type current limiting device based on intelligent self-driving of short-circuit fault current Download PDFInfo
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- CN117498283A CN117498283A CN202311404667.3A CN202311404667A CN117498283A CN 117498283 A CN117498283 A CN 117498283A CN 202311404667 A CN202311404667 A CN 202311404667A CN 117498283 A CN117498283 A CN 117498283A
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- 230000000670 limiting effect Effects 0.000 title claims abstract description 87
- 239000003990 capacitor Substances 0.000 claims abstract description 52
- 230000009471 action Effects 0.000 claims abstract description 21
- 238000001514 detection method Methods 0.000 claims description 17
- 230000003750 conditioning effect Effects 0.000 claims description 15
- 238000007599 discharging Methods 0.000 claims description 14
- 230000002457 bidirectional effect Effects 0.000 claims description 13
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 230000007246 mechanism Effects 0.000 claims description 5
- 238000004146 energy storage Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 11
- 101000666657 Homo sapiens Rho-related GTP-binding protein RhoQ Proteins 0.000 description 7
- 102100038339 Rho-related GTP-binding protein RhoQ Human genes 0.000 description 7
- 230000008569 process Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005422 blasting Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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- 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
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
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- 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
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
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- 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
-
- 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
- H02H9/08—Limitation or suppression of earth fault currents, e.g. Petersen coil
Abstract
The invention discloses a series resonance type current limiting device based on intelligent self-driving of short-circuit fault current. The invention does not need to provide an external action power supply, but uses the intelligent self-driven fast switch action of the short-circuit fault current, and the fast switch has no energy storage capacitor, so that repeated reclosing can be realized in a short time.
Description
Technical Field
The invention relates to the technical field of short-circuit fault current limiting, in particular to a series resonance type current limiting device based on intelligent self-driving of short-circuit fault current.
Background
With the development of the power system, the short-circuit current of the system is continuously increased, and a short-circuit fault is inevitably generated in the operation process of the power system, if the short-circuit current is not limited, the power grid and power transmission and transformation equipment are easy to cause faults, and the safety and stability of the power grid and the threat to the economic operation are caused. Limiting the short-circuit current level of the power system is important to improving the reliability of the power system. Current limiting measures commonly used at present comprise installation of fault current limiting devices, adjustment of power grid structures, change of system operation modes and the like. The method for adjusting the power grid structure and changing the system operation mode has the advantages of high implementation cost, long time, high difficulty, low feasibility, good current limiting effect, low cost and high reliability, and becomes a scheme with high feasibility.
Fault current limiting devices are classified into superconducting technology, blasting cutting technology, power electronics technology, tightly coupled reactors, and the like. However, the method has the defects of complex structure, long current limiting effect time, large occupied space, low reliability, higher cost and the like at present, relies on an action power supply during current limiting driving, and cannot realize current limiting self-driving based on short-circuit fault current. Accordingly, there is a need for a current limiting device that solves the above-mentioned problems.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the related art to some extent. Therefore, an object of the present invention is to provide a series resonance type current limiting device based on intelligent self-driving of short-circuit fault current, which has the advantages of simple structure, fast current limiting effect, small occupied space, low cost and high reliability, and can realize current limiting self-driving based on short-circuit fault current.
In order to achieve the above purpose, the invention is realized by the following technical scheme:
the utility model provides a series resonance type current limiting device based on short circuit fault current intelligence self-driving, includes inlet end, play line end, main circuit and control circuit, main circuit includes power electronics break-make control switch, fast switch, voltage limiting device, discharge reactance, discharge resistance, condenser and reactor, the reactor sets up the inlet end, power electronics break-make control switch with fast switch connects, fast switch forms first branch road after connecting with voltage limiting device in parallel, discharge reactance with discharge resistance connects in parallel and forms the second branch road, first branch road with after the second branch road is established ties, with the condenser is connected in parallel respectively between inlet end and the outlet end, voltage limiting device is used for limiting the interelectrode voltage of condenser; the control circuit comprises a current detection TC, a main controller and a driving circuit, wherein the main controller is respectively connected with the current detection TC and the driving circuit, and the driving circuit is connected with the power electronic on-off control switch;
under a normal working state of the circuit, the fast switch is in an off state, and normal working current passes through the reactor and the capacitor from the incoming line end to the outgoing line end; when a circuit has a short circuit fault and the main controller detects that the short circuit current is larger than a preset value through the current detection TC, the main controller sends a driving signal to the driving circuit so that the driving circuit drives the power electronic on-off control switch to be conducted, and the power electronic on-off control switch is conducted so that the fast switch is in a closed state under the action of the short circuit current, thereby realizing the current limiting action on the short circuit fault current.
Preferably, the voltage limiting device is a bidirectional power electronic switch or a lightning arrester, and the fast switch is a switch formed by connecting a vacuum arc extinguishing device and an electromagnetic repulsion mechanism.
Preferably, when a short circuit fault occurs in a circuit and the voltage limiting device is the bidirectional power electronic switch, and the main controller detects that the short circuit current is greater than a preset value through the current detection TC, the main controller drives the bidirectional power electronic switch to be conducted through the driving circuit, and bypasses the capacitor to limit the inter-electrode voltage of the capacitor.
Preferably, when a short circuit fault occurs in the line and the voltage limiting device is the lightning arrester, and the voltage at two ends of the capacitor reaches the residual voltage of the lightning arrester, the lightning arrester acts to limit the interelectrode voltage of the capacitor.
Preferably, the device further comprises an energy taking TC and a switching power supply, wherein the energy taking TC is used for taking energy from a circuit, converting the taken alternating current into direct current through the switching power supply and supplying power to the main controller.
Preferably, the control circuit further comprises a signal conditioning circuit, the signal conditioning circuit is connected with the current detection TC, and the signal conditioning circuit is used for performing signal processing on the short-circuit current detected by the current detection TC.
Preferably, the control circuit further comprises an analog-to-digital conversion circuit, the analog-to-digital conversion circuit is respectively connected with the signal conditioning circuit and the main controller, and the analog-to-digital conversion circuit is used for converting the signals processed by the signal conditioning circuit into digital signals and transmitting the digital signals to the main controller.
Preferably, the control circuit further comprises a wireless radio frequency module, and the wireless radio frequency module is used for communicating with external equipment through the series resonance type current limiting device to realize a remote control function.
The invention has at least the following technical effects:
the invention provides a series resonance type current limiting device based on intelligent self-driving of short-circuit fault current, which can firstly limit the voltage between the capacitor electrodes through a voltage limiting device when short-circuit fault occurs, and then control a self-driving fast switch to be fast closed under the action of the short-circuit current through a driving circuit so as to bypass the capacitor, so that the loop impedance is equal to a current limiting reactance value, and the current limiting effect is exerted. Compared with the traditional current limiting device, the device does not need to provide an external action power supply, but intelligently self-drives a fast switch to act by short-circuit fault current, and compared with the traditional current limiting device, the device has no energy storage capacitor of the fast switch, and can realize repeated reclosing in a short time; in addition, the quick switch adopts the switch formed by connecting the vacuum arc extinguishing device and the electromagnetic repulsion mechanism, can realize the closing action time of 5ms and improve the switching action speed, thereby improving the current limiting efficiency.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
Fig. 1 is a schematic structural diagram of a series resonance type current limiting device based on intelligent self-driving of short-circuit fault current according to an embodiment of the present invention.
Detailed Description
The present embodiment is described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
A series resonance type current limiting device based on the intelligent self-driving of the short-circuit fault current of the present embodiment is described below with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a series resonance type current limiting device based on intelligent self-driving of short-circuit fault current according to an embodiment of the present invention. As shown in fig. 1, the device comprises a wire inlet end P1, a wire outlet end P2, a main circuit and a control circuit, wherein the main circuit comprises a power electronic on-off control switch 1, a fast switch 2, a voltage limiting device 3, a discharging reactance 4, a discharging resistor 5, a capacitor 6 and a reactor 8, wherein the fast switch 2, the voltage limiting device 3, the discharging reactance 4, the discharging resistor 5 and the capacitor 6 form a current limiting circuit 7, the current limiting circuit 7 and the reactor 8 are connected in series between the wire inlet end P1 and the wire outlet end P2, and the current limiting circuit 7 and the reactor 8 are supported by a post insulator 9. Further, the power electronic on-off control switch 1 is connected with the fast switch 2, the fast switch 2 is connected with the voltage limiting device 3 in parallel to form a first branch, the discharging reactance 4 is connected with the discharging resistor 5 in parallel to form a second branch, the first branch is connected with the second branch in series and then is connected with the capacitor 6 in parallel between the wire inlet end P1 and the wire outlet end P2 respectively, and the voltage limiting device 3 is used for limiting the interelectrode voltage of the capacitor 6; the control circuit comprises a current detection TC10 (TC is a current sensor), a main controller 11 and a driving circuit 12, wherein the main controller 11 is respectively connected with the current detection TC10 and the driving circuit 12, the driving circuit 12 is connected with the power electronic on-off control switch 1, and the device is immersed in insulating oil and sealed by a metal shell.
Specifically, in a normal working state of the circuit, the fast switch 2 is in an off state, and normal working current flows from the wire inlet end P1 to the wire outlet end P2 through the reactor 8 and the capacitor 6; when a short circuit fault occurs in a circuit and the main controller 11 detects that the short circuit current is larger than a preset value through the current detection TC10, the main controller 11 sends a driving signal to the driving circuit 12 so that the driving circuit 12 drives the power electronic on-off control switch 1 to be conducted, and the power electronic on-off control switch 1 is conducted so that the quick switch 2 is in a closed state under the action of the short circuit current, thereby realizing the current limiting effect on the short circuit fault current.
When the power electronic on-off control switch 1 is turned on, the loop where the fast switch 2 is located is turned on, and the loop where the fast switch 2 is located is turned on, so that the fast switch 2 can be closed under the action of short-circuit current, thereby bypassing the capacitor 6 and realizing the current limiting effect on the short-circuit fault current.
In one embodiment of the invention, the voltage limiting device 3 is a bidirectional power electronic switch or a lightning arrester such as a MOA (metal oxide arrester) lightning arrester, and the fast switch 2 is a switch formed by connecting a vacuum arc extinguishing device and an electromagnetic repulsion mechanism.
When the line has a short circuit fault and the voltage limiting device 3 is a bidirectional power electronic switch, and the main controller 11 detects that the short circuit current is greater than a preset value through the current detection TC10, the main controller 11 is further configured to drive the bidirectional power electronic switch to be turned on through the driving circuit 12, and bypass the capacitor 6, so as to limit the inter-electrode voltage of the capacitor 6. When a short-circuit fault occurs in the line and the voltage limiting device 3 is a lightning arrester, and the voltage at the two ends of the capacitor 6 reaches the residual voltage of the lightning arrester, the lightning arrester acts to limit the interelectrode voltage of the capacitor 6.
Specifically, before the current is limited by the fast switch 2, the bidirectional power electronic switch can be driven to be turned on to bypass the capacitor 6, so as to limit the inter-electrode voltage of the capacitor 6, or the lightning arrester acts to limit the inter-electrode voltage of the capacitor 6, so that the circuit voltage limiting protection is realized.
In one embodiment of the invention, the device further comprises an energy taking TC13 and a switching power supply 14, such as an AC/DC (alternating current/direct current) power supply, wherein the energy taking TC13 is used for taking energy from a line, and the taken alternating current is converted into direct current through the switching power supply 14 to supply power to the main controller 11.
Optionally, the control circuit further includes a signal conditioning circuit 15, where the signal conditioning circuit 15 is connected to the current detecting TC10, and the signal conditioning circuit 15 is configured to perform signal processing on the short-circuit current detected by the current detecting TC10, so as to obtain a current analog signal. The control circuit further comprises an analog-to-digital conversion circuit 16, the analog-to-digital conversion circuit 16 is respectively connected with the signal conditioning circuit 15 and the main controller 11, and the analog-to-digital conversion circuit 16 is used for converting the current analog signal processed by the signal conditioning circuit 15 into a digital signal and transmitting the digital signal to the main controller 11 for processing. The control circuit also comprises a wireless radio frequency module 17 which is mainly used for communicating with external equipment through a series resonance type current limiting device, and a remote control function is realized.
In order to enable those skilled in the art to clearly understand the working principle of the series resonance type current limiting device based on the intelligent self-driving of the short-circuit fault current, the following description will be made with reference to fig. 1.
Taking the voltage limiting device 3 as an example, a bidirectional power electronic switch is adopted, the rapid bypass process of the capacitor 6 is as follows: when a short circuit fault occurs, the current detection TC10 detects the current i in the line 1 When the threshold value is exceeded, that is, the fault current range is reached, the main controller 11 sends a high-level on signal d 1 To the driving circuit 12, the driving circuit 12 injects a trigger current to the gates of the power electronic on-off control switch 1 and the bidirectional power electronic switch to trigger them. First, the bi-directional power electronic switch bypass capacitor 6, limitingProducing a voltage between electrodes of the capacitor 6; then, the self-driven fast switch, namely the fast switch 2, is closed under the action of short-circuit current, the capacitor 6 is bypassed, the loop impedance is equal to the current limiting reactance value, and the device plays a current limiting role.
When the short-circuit fault current is disconnected by the circuit breaker at the power supply side of the power transmission line, the current of the fast switch 2 is reduced to 0, the fast switch 2 is automatically disconnected, the capacitor 6 and the reactor 8 recover to be in series resonance, the impedance is close to 0, and the line recovers to a normal working state.
Wherein, the effect of discharge reactance 4 and discharge resistance 5 is: after the fast switch 2 bypasses the capacitor 6, the capacitor 6 discharges through the contacts in the voltage limiting device 3 and the vacuum arc extinguishing device in the fast switch 2, and if the current flowing during discharging is too large, the contacts in the voltage limiting device 3 and the vacuum arc extinguishing device may be damaged, and meanwhile, the capacitor 6 is not allowed to discharge with too large current. Therefore, it is necessary to connect a discharge reactor 4 having a small inductance value in series with the discharge circuit of the capacitor 6 to limit the discharge current of the capacitor 6. The discharging resistor 5 is used for consuming energy released by the capacitor 6, so as to avoid continuous oscillation of the capacitor 6 and the discharging reactance 4.
When the device is first put into use, the drive circuit 12 is not powered up as the control circuit is not activated at this time. At this time, if the line has a short-circuit fault, the fast switch 2 can be automatically closed by fault current, and after the fast switch is closed, the capacitor 6 can be bypassed, so that the loop impedance is equal to the current limiting reactance value, and the device plays a role in current limiting.
When the voltage limiting device 3 adopts the MOA arrester, the drive control portion of the bidirectional power electronic switch is removed. When a short-circuit fault occurs, the current flowing through the capacitor 6 increases, the voltage at two ends of the capacitor 6 increases, when the voltage increases and exceeds the residual voltage of the MOA arrester, the MOA arrester acts to limit the voltage of the capacitor 6 to increase, then the self-driven fast switch, namely the fast switch 2 is controlled according to the method, and after the fast switch 2 is switched on, the MOA arrester and the capacitor 6 are bypassed.
In the device, the self-driven fast switch 2 can be driven by fault current, namely, when a short-circuit fault occurs in the system, an action signal is sent to the self-driven fast switch, and the self-driven fast switch can be automatically closed under the action of the fault current, namely, the short-circuit current, so that the effect of controlling the switching of the discharging reactor 4 and limiting the short-circuit fault current is achieved. When the self-driven fast switch is in fault throwing, the self-driven fast switch can automatically act under the driving of fault current under the condition that the control circuit part is in power failure.
When the system works normally, the control circuit can be activated, the main controller 11 sends a signal to enable the self-driven fast switch to be kept in an off state, at the moment, current flows through the capacitor 6 and the reactor 8, the capacitor 6 and the reactor are in a series resonance state, the impedance is 0, and the circuit is in a normal working state.
In summary, the invention provides a series resonance type current limiting device based on intelligent self-driving of short-circuit fault current, which can firstly limit the voltage between the capacitors through a voltage limiting device when short-circuit fault occurs, and then control a self-driving fast switch to be fast closed under the action of the short-circuit current through a driving circuit so as to bypass the capacitors, so that the loop impedance is equal to the current limiting reactance value, and thus the current limiting function is exerted. Compared with the traditional current limiting device, the device does not need to provide an external action power supply, but intelligently self-drives a fast switch to act by short-circuit fault current, and compared with the traditional current limiting device, the device has no energy storage capacitor of the fast switch, and can realize repeated reclosing in a short time; in addition, the quick switch adopts the switch formed by connecting the vacuum arc extinguishing device and the electromagnetic repulsion mechanism, can realize the closing action time of 5ms and improve the switching action speed, thereby improving the current limiting efficiency.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
While the present invention has been described in detail through the foregoing description of the preferred embodiment, it should be understood that the foregoing description is not to be considered as limiting the invention. Many modifications and substitutions of the present invention will become apparent to those of ordinary skill in the art upon reading the foregoing. Accordingly, the scope of the invention should be limited only by the attached claims.
Claims (8)
1. The series resonance type current limiting device is characterized by comprising a wire inlet end, a wire outlet end, a main circuit and a control circuit, wherein the main circuit comprises a power electronic on-off control switch, a fast switch, a voltage limiting device, a discharging reactance, a discharging resistor, a capacitor and a reactor, the reactor is arranged at the wire inlet end, the power electronic on-off control switch is connected with the fast switch, the fast switch is connected with the voltage limiting device in parallel to form a first branch, the discharging reactance is connected with the discharging resistor in parallel to form a second branch, the first branch is connected with the second branch in series and then is connected with the capacitor in parallel between the wire inlet end and the wire outlet end, and the voltage limiting device is used for limiting interelectrode voltage of the capacitor; the control circuit comprises a current detection TC, a main controller and a driving circuit, wherein the main controller is respectively connected with the current detection TC and the driving circuit, and the driving circuit is connected with the power electronic on-off control switch;
under a normal working state of the circuit, the fast switch is in an off state, and normal working current passes through the reactor and the capacitor from the incoming line end to the outgoing line end; when a circuit has a short circuit fault and the main controller detects that the short circuit current is larger than a preset value through the current detection TC, the main controller sends a driving signal to the driving circuit so that the driving circuit drives the power electronic on-off control switch to be conducted, and the power electronic on-off control switch is conducted so that the fast switch is in a closed state under the action of the short circuit current, thereby realizing the current limiting action on the short circuit fault current.
2. The series resonance type current limiting device based on the intelligent self-driving of the short-circuit fault current as claimed in claim 1, wherein the voltage limiting device is a bidirectional power electronic switch or a lightning arrester, and the fast switch is a switch formed by connecting a vacuum arc extinguishing device and an electromagnetic repulsion mechanism.
3. The intelligent self-driven series resonance type current limiting device based on short-circuit fault current according to claim 2, wherein when a short-circuit fault occurs in a circuit and the voltage limiting device is the bidirectional power electronic switch, and the main controller detects that the short-circuit current is larger than a preset value through the current detection TC, the main controller further drives the bidirectional power electronic switch to be conducted through the driving circuit, and bypasses the capacitor to limit the inter-electrode voltage of the capacitor.
4. The intelligent self-driven series resonance type current limiting device based on short-circuit fault current according to claim 2, wherein when a short-circuit fault occurs in a line and the voltage limiting device is the lightning arrester, and the voltage across the capacitor reaches the residual voltage of the lightning arrester, the lightning arrester acts to limit the inter-electrode voltage of the capacitor.
5. The intelligent self-driven series resonance type current limiting device based on the short-circuit fault current as claimed in claim 1, further comprising an energy taking TC and a switching power supply, wherein the energy taking TC is used for converting the taken alternating current into direct current through the switching power supply after taking energy from a circuit, and supplying power to the main controller.
6. The series resonance type current limiting device based on intelligent self-driving of short-circuit fault current according to claim 1, wherein the control circuit further comprises a signal conditioning circuit, the signal conditioning circuit is connected with the current detection TC, and the signal conditioning circuit is used for performing signal processing on the short-circuit current detected by the current detection TC.
7. The series resonance type current limiting device based on the intelligent self-driving of the short-circuit fault current as claimed in claim 6, wherein the control circuit further comprises an analog-to-digital conversion circuit, the analog-to-digital conversion circuit is respectively connected with the signal conditioning circuit and the main controller, and the analog-to-digital conversion circuit is used for converting the signal processed by the signal conditioning circuit into a digital signal and transmitting the digital signal to the main controller.
8. The intelligent self-driven series resonance type current limiting device based on short-circuit fault current according to any one of claims 1-7, wherein the control circuit further comprises a wireless radio frequency module, and the wireless radio frequency module is used for communicating with an external device to realize a remote control function.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311404667.3A CN117498283A (en) | 2023-10-26 | 2023-10-26 | Series resonance type current limiting device based on intelligent self-driving of short-circuit fault current |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311404667.3A CN117498283A (en) | 2023-10-26 | 2023-10-26 | Series resonance type current limiting device based on intelligent self-driving of short-circuit fault current |
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| CN117498283A true CN117498283A (en) | 2024-02-02 |
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| CN202311404667.3A Pending CN117498283A (en) | 2023-10-26 | 2023-10-26 | Series resonance type current limiting device based on intelligent self-driving of short-circuit fault current |
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| US11095110B1 (en) * | 2018-06-28 | 2021-08-17 | Smart Wires Inc. | Energy harvesting from fault currents |
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2023
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| KR20030023514A (en) * | 2001-09-12 | 2003-03-19 | 가부시키 가이샤 메이덴샤 | Contact arrangement for vacuum interrupter and vacuum interrupter using the contact arrangement |
| CN102195266A (en) * | 2010-03-12 | 2011-09-21 | 华东电力试验研究院有限公司 | Series resonant-type fault current limiter |
| CN105790242A (en) * | 2014-12-17 | 2016-07-20 | 国家电网公司 | Series resonant-type fault current limiter |
| CN205429749U (en) * | 2016-03-21 | 2016-08-03 | 重庆朗天通讯股份有限公司 | Intelligent cascade compensation device of electric power distribution network |
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| US11095110B1 (en) * | 2018-06-28 | 2021-08-17 | Smart Wires Inc. | Energy harvesting from fault currents |
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