CN108767807B - Dual-control tripping circuit for 10kV circuit breaker for distribution network automation - Google Patents
Dual-control tripping circuit for 10kV circuit breaker for distribution network automation Download PDFInfo
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- CN108767807B CN108767807B CN201810825194.7A CN201810825194A CN108767807B CN 108767807 B CN108767807 B CN 108767807B CN 201810825194 A CN201810825194 A CN 201810825194A CN 108767807 B CN108767807 B CN 108767807B
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- microcontroller
- energy storage
- optical coupler
- storage capacitor
- coupler actuator
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- 239000003990 capacitor Substances 0.000 claims abstract description 29
- 238000004146 energy storage Methods 0.000 claims abstract description 26
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 26
- 238000001914 filtration Methods 0.000 claims abstract description 18
- 230000003287 optical effect Effects 0.000 claims description 26
- 238000004891 communication Methods 0.000 claims description 4
- 230000009977 dual effect Effects 0.000 claims description 3
- 238000005457 optimization Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity 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
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/06—Arrangements for supplying operative power
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- 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
- H02H3/02—Details
- H02H3/05—Details with means for increasing reliability, e.g. redundancy arrangements
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
Landscapes
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The application discloses a double-control tripping circuit of a 10kV circuit breaker for distribution network automation, which comprises the following components: the device comprises a transformer, a rectifying and filtering module, a relay, a first microcontroller, a second microcontroller, a first opto-coupler actuator, a second opto-coupler actuator, a direct-current voltage stabilizing module, an energy storage capacitor group, a resistor and a diode. And when the power grid is normal, the first and second microcontrollers are powered by the mains supply. When the fault of the power grid is powered off, the first microcontroller and the second microcontroller are converted into power supplied by the standby power supply through the action of the relay. Thus, the trip action is ensured to be completed. Meanwhile, the first microcontroller and the second microcontroller are used as double controllers, so that tripping operation is further guaranteed to be completed. The application can be used in the aspect of electrical safety protection.
Description
Technical Field
The application relates to the technical field of electrical safety protection, in particular to a tripping protection circuit.
Background
The existing circuit breaker generally comprises a current transformer, a rectifying and filtering circuit, a voltage reducing circuit, a singlechip, a tripping module and a signal detection circuit. When the single-chip microcomputer is in operation, alternating current is rectified and reduced in voltage and then is used as a power supply to supply power for the single-chip microcomputer. The singlechip determines whether to carry out tripping action or not by comparing the detected current value with a set value, and then outputs a control signal to the tripping module. However, the trip control circuit has the following defects:
1. the circuit breaker cannot be powered in case of a grid fault. Even if a backup battery is adopted as a supplementary means, the stability and reliability of the power supply of the circuit breaker cannot be ensured due to the problem of the service life of the battery.
2. Due to the adoption of a single controller, under the condition that a microcontroller fails or a control circuit is interfered, the short-circuiting device cannot be ensured to carry out tripping action according to requirements.
Disclosure of Invention
The purpose of the application is that: the double-power-supply and double-tripping control circuit is provided for ensuring that the circuit breaker is always in a continuous and reliable running state so as to overcome the defects and meet the tripping requirement under the condition of faults.
The application solves the technical problems as follows: a 10kV circuit breaker double-control trip circuit for distribution network automation, comprising: the device comprises a transformer, a rectifying and filtering module, a relay, a first microcontroller, a second microcontroller, a first opto-coupler actuator, a second opto-coupler actuator, a direct-current voltage stabilizing module, an energy storage capacitor group, a resistor and a diode, wherein the energy storage capacitor group comprises at least one energy storage capacitor, the first microcontroller and the second microcontroller are in communication connection with each other, the transformer is connected with the rectifying and filtering module in parallel, and the rectifying and filtering module supplies power for the relay; when the relay is electrified, the output end of the rectifying and filtering module is respectively connected with the power ends of the first microcontroller and the second microcontroller, and when the relay is in a power failure state, the output end of the direct current voltage stabilizing module is respectively connected with the power ends of the first microcontroller and the second microcontroller; one end of the energy storage capacitor group is connected with the zero line and the input end of the direct current voltage stabilizing module respectively, the other end of the energy storage capacitor group is connected with one end of the resistor and the grounding end of the direct current voltage stabilizing module respectively, the other end of the resistor is connected with the anode of the diode, the cathode of the diode is connected with the live wire, the control ends of the first optical coupler actuator and the second optical coupler actuator are connected with the first GPIO ports of the first microcontroller and the second microcontroller respectively, the second GPIO port of the first microcontroller is connected with the output end of the rectifying and filtering module, and the output ends of the first optical coupler actuator and the second optical coupler actuator are used for outputting and controlling the level of the tripping coil.
Further, the energy storage capacitor group comprises two energy storage capacitors which are connected in parallel.
Further, the first microcontroller and the second microcontroller are both single-chip computers.
Further, the first and second microcontrollers are connected to each other through a serial port.
Further, a voltage stabilizing tube is arranged between the input end and the grounding end of the direct current voltage stabilizing module.
The beneficial effects of the application are as follows: and when the power grid is normal, the first and second microcontrollers are powered by the mains supply. When the fault of the power grid is powered off, the first microcontroller and the second microcontroller are converted into power supplied by the standby power supply through the action of the relay. Thus, the trip action is ensured to be completed. Meanwhile, the first microcontroller and the second microcontroller are used as double controllers, so that tripping operation is further guaranteed to be completed.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings that are required to be used in the description of the embodiments will be briefly described below. It is evident that the drawings described are only some embodiments of the application, but not all embodiments, and that other designs and drawings can be obtained from these drawings by a person skilled in the art without inventive effort.
Fig. 1 is a schematic diagram of the connection of the inventive circuit.
Detailed Description
The conception, specific structure, and technical effects produced by the present application will be clearly and completely described below with reference to the embodiments and the drawings to fully understand the objects, features, and effects of the present application. It is apparent that the described embodiments are only some embodiments of the present application, but not all embodiments, and that other embodiments obtained by those skilled in the art without inventive effort are within the scope of the present application based on the embodiments of the present application. In addition, all coupling/connection relationships mentioned herein do not refer to direct connection of the components, but rather, refer to the fact that a more optimal coupling structure may be formed by adding or subtracting coupling aids depending on the particular implementation. The technical features in the application can be interactively combined on the premise of no contradiction and conflict.
Embodiment 1, referring to fig. 1, a dual control trip circuit of a 10kV circuit breaker for distribution network automation includes: the transformer 1, the rectification filter module 2, the relay K, first microcontroller U1, second microcontroller U2, first opto-coupler executor U3, second opto-coupler executor U4, direct current steady voltage module 3, energy storage capacitor group 6, resistance R1, diode D2, first microcontroller U1 and second microcontroller U2 are communication connection each other, and transformer 1 and rectification filter module 2 connect in parallel. The two ends of the primary coil of the transformer 1 are respectively connected with a live wire L and a zero wire N, the two ends of the secondary coil of the transformer 1 are respectively connected with the input end of the rectifying and filtering module 2, the output end of the rectifying and filtering module 2 is connected with the relay K to supply power for the relay K, and the contact switch of the relay K is provided with two communication modes. When the relay K is electrified, the contact switch of the relay K communicates the output end of the rectifying and filtering module 2 with the power ends of the first microcontroller U1 and the second microcontroller U2 respectively; when the relay K lacks electricity, the contact switch of the relay K communicates the output end of the direct current voltage stabilizing module 3 with the power ends of the first microcontroller U1 and the second microcontroller U2 respectively. One end of the energy storage capacitor group 6 is connected with the zero line N and the input end of the direct current voltage stabilizing module 3, the other end of the energy storage capacitor group 6 is respectively connected with one end of a switch of the switch module 4 and one end of a resistor R1, the other end of the resistor R1 is connected with the positive electrode of a diode D2, and the negative electrode of the diode D2 is connected with a live wire L; the other end of the energy storage capacitor group 6 is used as a zero potential end GND and is connected with the grounding end of the direct current voltage stabilizing module 3. The collector electrodes of the first optical coupler actuator U3 and the second optical coupler actuator U4 are respectively connected with the input end of the direct current voltage stabilizing module 3, the emitter electrodes of the first optical coupler actuator U3 and the second optical coupler actuator U4 serve as the output ends of the first optical coupler actuator U3 and the second optical coupler actuator U4 to be respectively connected with the control end of the switch module 4, the other end of the switch module 4 is connected with one end of the tripping coil 5, and the other end of the tripping coil 5 is connected with the zero line N. The switch module 4 comprises a triode, the collector of the triode is connected with one end of the tripping coil 5 in series, the emitter of the triode is connected with the other end of the energy storage capacitor group 6, and the base of the triode is connected with the emitters of the first optical coupler actuator U3 and the second optical coupler actuator U4.
Anodes of the first optical coupler actuator U3 and the second optical coupler actuator U4 serve as control ends of the first optical coupler actuator U3 and the second optical coupler actuator U4 to be connected with first GPIO ports of the first microcontroller U1 and the second microcontroller U2 respectively, second GPIO ports of the first microcontroller U1 are connected with output ends of the rectifying and filtering module 2, and cathodes of the first optical coupler actuator U3 and the second optical coupler actuator U4 are connected with a zero potential end GND respectively.
When the mains supply has no fault, the live wire L and the zero wire N charge the energy storage capacitor group 6 through the resistor R1, and the tripping coil 5 does not normally act.
When the mains supply fails, the relay K is in power failure, and the output end of the direct current voltage stabilizing module 3 is connected with the power supply ends of the first microcontroller U1 and the second microcontroller U2 respectively. At this time, the energy storage capacitor group 6 discharges, a 15V supply voltage is generated at the input end of the dc voltage stabilizing module 3, and a 5V voltage is output at the output end of the dc voltage stabilizing module 3, and the 5V voltage acts on the first microcontroller U1 and the second microcontroller U2 to maintain the first microcontroller U1 and the second microcontroller U2 to operate. When the power is off, the second GPIO port of the first microcontroller U1 can detect that the output end of the rectifying and filtering module 2 has no voltage output, and transmits the information to the second microcontroller U2, at the moment, the first GPIO ports of the first microcontroller U1 and the second microcontroller U2 all output high level, so that the first optocoupler actuator U3 and the second optocoupler actuator U4 are controlled to be conducted, the power supply voltage acts on the control end of the switch module 4 through the first optocoupler actuator U3 and the second optocoupler actuator U4, the switch of the switch module 4 is conducted, the energy storage capacitor bank 6 discharges to the tripping coil 5, and the tripping coil 5 acts to finish tripping.
The application uses the energy storage capacitor group 6 as a standby power supply, and when the power grid is normal, the first microcontroller U1 and the second microcontroller U2 are powered by the mains supply. When a fault outage of the power grid occurs, the first microcontroller U1 and the second microcontroller U2 are converted into power supplied by the standby power supply through the action of the relay K. Thus, the trip action is ensured to be completed. Meanwhile, the first microcontroller U1 and the second microcontroller U2 are used as double controllers, so that the tripping operation is further ensured to be completed.
As an optimization, the energy storage capacitor group 6 includes a capacitor C1 and a capacitor C2, where the capacitors C1 and C2 are connected in parallel.
As an optimization, the first microcontroller U1 and the second microcontroller U2 are both single-chip computers.
As an optimization, the first microcontroller U1 and the second microcontroller U2 are connected to each other through a serial port.
As optimization, a voltage stabilizing tube D1 is arranged between the input end and the grounding end of the direct current voltage stabilizing module 3, the negative electrode of the voltage stabilizing tube D1 is connected with the input end of the direct current voltage stabilizing module 3, and the positive electrode of the voltage stabilizing tube D1 is connected with the grounding end of the direct current voltage stabilizing module 3.
While the preferred embodiment of the present application has been described in detail, the application is not limited to the embodiments, and various equivalent modifications and substitutions can be made by those skilled in the art without departing from the spirit of the application, and these modifications and substitutions are intended to be included in the scope of the present application as defined in the appended claims.
Claims (5)
1. A be used for joining in marriage automatic 10kV circuit breaker double control tripping circuit of net, characterized by, include: the device comprises a transformer, a rectifying and filtering module, a relay, a first microcontroller, a second microcontroller, a first opto-coupler actuator, a second opto-coupler actuator, a direct-current voltage stabilizing module, an energy storage capacitor group, a resistor and a diode, wherein the energy storage capacitor group comprises at least one energy storage capacitor, the first microcontroller and the second microcontroller are in communication connection with each other, the transformer is connected with the rectifying and filtering module in parallel, and the rectifying and filtering module supplies power for the relay; when the relay is electrified, the output end of the rectifying and filtering module is respectively connected with the power ends of the first microcontroller and the second microcontroller, and when the relay is in a power failure state, the output end of the direct current voltage stabilizing module is respectively connected with the power ends of the first microcontroller and the second microcontroller; one end of the energy storage capacitor group is respectively connected with the zero line and the input end of the direct current voltage stabilizing module, the other end of the energy storage capacitor group is respectively connected with one end of the resistor and the grounding end of the direct current voltage stabilizing module, the other end of the resistor is connected with the anode of the diode, the cathode of the diode is connected with the live wire, the control ends of the first optical coupler actuator and the second optical coupler actuator are respectively connected with the first GPIO ports of the first microcontroller and the second microcontroller, the second GPIO port of the first microcontroller is connected with the output end of the rectifying and filtering module, and the output ends of the first optical coupler actuator and the second optical coupler actuator are used for outputting and controlling the level of the tripping coil;
when the power is off, the second GPIO port of the first microcontroller can detect that the output end of the rectifying and filtering module has no voltage output, and transmits the information to the second microcontroller, at the moment, the first GPIO ports of the first microcontroller and the second microcontroller all output high level, so that the first optical coupler actuator and the second optical coupler actuator are controlled to be conducted, the power supply voltage acts on the control end of the switch module through the first optical coupler actuator and the second optical coupler actuator, the switch of the switch module is conducted, the energy storage capacitor group discharges to the tripping coil, and the tripping coil acts to finish tripping.
2. The dual control trip circuit of a 10kV circuit breaker for distribution network automation according to claim 1, wherein the energy storage capacitor group comprises two energy storage capacitors connected in parallel with each other.
3. The dual-control tripping circuit for the 10kV circuit breaker for distribution network automation according to claim 1, wherein the first microcontroller and the second microcontroller are both single-chip computers.
4. The dual control trip circuit of a 10kV circuit breaker for distribution network automation of claim 1, wherein the first and second microcontrollers are connected to each other through a serial port.
5. The double-control tripping circuit for the 10kV circuit breaker for distribution network automation according to claim 1, wherein a voltage stabilizing tube is arranged between the input end and the grounding end of the direct current voltage stabilizing module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810825194.7A CN108767807B (en) | 2018-07-25 | 2018-07-25 | Dual-control tripping circuit for 10kV circuit breaker for distribution network automation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810825194.7A CN108767807B (en) | 2018-07-25 | 2018-07-25 | Dual-control tripping circuit for 10kV circuit breaker for distribution network automation |
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| Publication Number | Publication Date |
|---|---|
| CN108767807A CN108767807A (en) | 2018-11-06 |
| CN108767807B true CN108767807B (en) | 2023-10-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810825194.7A Active CN108767807B (en) | 2018-07-25 | 2018-07-25 | Dual-control tripping circuit for 10kV circuit breaker for distribution network automation |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| JP2003308775A (en) * | 2002-04-17 | 2003-10-31 | Mitsubishi Electric Corp | Under-voltage trip device for circuit breaker |
| KR100950950B1 (en) * | 2009-10-08 | 2010-04-01 | 주식회사 한국엔엠텍 | Motor battery automatic charger |
| CN102709129A (en) * | 2012-06-26 | 2012-10-03 | 江苏国星电器有限公司 | Permanent magnet undervoltage tripping device |
| CN103475086A (en) * | 2013-09-06 | 2013-12-25 | 广州凯盛电子科技有限公司 | Power source capable of achieving seamless switching of multiple power supply modules |
| CN203660492U (en) * | 2013-12-11 | 2014-06-18 | 广东天能电力设计有限公司 | Microcomputer comprehensive protection device having active/passive automatic switching function |
| CN103915816A (en) * | 2014-04-22 | 2014-07-09 | 中国船舶重工集团公司第七一二研究所 | Dual-redundancy protective device and protection method |
| CN105449628A (en) * | 2014-09-26 | 2016-03-30 | 上海电科电器科技有限公司 | Protective device and protective method of electronic release |
| CN205882834U (en) * | 2016-06-20 | 2017-01-11 | 国家电网公司 | Switching station energy storage power auto -change over device |
| CN205960783U (en) * | 2016-08-18 | 2017-02-15 | 安徽徽电科技股份有限公司 | Device is cut soon in no disturbance |
| CN206710815U (en) * | 2017-05-16 | 2017-12-05 | 山东科技大学 | A kind of dual controller redundant reset control circuit |
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2018
- 2018-07-25 CN CN201810825194.7A patent/CN108767807B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1458930A1 (en) * | 1986-02-05 | 1989-02-15 | П.К,Дергунов | Automatic standby power connection arrangement |
| JP2003308775A (en) * | 2002-04-17 | 2003-10-31 | Mitsubishi Electric Corp | Under-voltage trip device for circuit breaker |
| KR100950950B1 (en) * | 2009-10-08 | 2010-04-01 | 주식회사 한국엔엠텍 | Motor battery automatic charger |
| CN102709129A (en) * | 2012-06-26 | 2012-10-03 | 江苏国星电器有限公司 | Permanent magnet undervoltage tripping device |
| CN103475086A (en) * | 2013-09-06 | 2013-12-25 | 广州凯盛电子科技有限公司 | Power source capable of achieving seamless switching of multiple power supply modules |
| CN203660492U (en) * | 2013-12-11 | 2014-06-18 | 广东天能电力设计有限公司 | Microcomputer comprehensive protection device having active/passive automatic switching function |
| CN103915816A (en) * | 2014-04-22 | 2014-07-09 | 中国船舶重工集团公司第七一二研究所 | Dual-redundancy protective device and protection method |
| CN105449628A (en) * | 2014-09-26 | 2016-03-30 | 上海电科电器科技有限公司 | Protective device and protective method of electronic release |
| CN205882834U (en) * | 2016-06-20 | 2017-01-11 | 国家电网公司 | Switching station energy storage power auto -change over device |
| CN205960783U (en) * | 2016-08-18 | 2017-02-15 | 安徽徽电科技股份有限公司 | Device is cut soon in no disturbance |
| CN206710815U (en) * | 2017-05-16 | 2017-12-05 | 山东科技大学 | A kind of dual controller redundant reset control circuit |
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| Publication number | Publication date |
|---|---|
| CN108767807A (en) | 2018-11-06 |
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