CN202206427U - Novel intelligent substation breaker intelligent electronic device (IED) based on advanced reduced instruction set computer machine (ARM) and digital signal processor (DSP) - Google Patents
Novel intelligent substation breaker intelligent electronic device (IED) based on advanced reduced instruction set computer machine (ARM) and digital signal processor (DSP) Download PDFInfo
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- CN202206427U CN202206427U CN2011202887810U CN201120288781U CN202206427U CN 202206427 U CN202206427 U CN 202206427U CN 2011202887810 U CN2011202887810 U CN 2011202887810U CN 201120288781 U CN201120288781 U CN 201120288781U CN 202206427 U CN202206427 U CN 202206427U
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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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
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/16—Electric power substations
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Abstract
The utility model discloses a novel intelligent substation breaker intelligent electronic device (IED) based on an advanced reduced instruction set computer machine (ARM) and a digital signal processor (DSP). An ARM 9 chip S3C2440A and a DSP chip TMS320F28335 form a double central processing unit (CPU) structure. The double CPUs serve as a control core, a controller area network (CAN) interface, a 485 network interface, a recommended standard (RS) 232 interface, an Ethernet interface, a wireless fidelity (Wifi) and a secure digital (SD) card interface are respectively set up on the periphery. The system adopts inter range instrumentation group (IRIG)-B codes to synchronize time so as to provide precise unified time standard, electromagnetic disturbance on equipment is fully considered in the breaker IED, and each power supply circuit is separated in a partition area when a power supply portion is designed. The breaker IED integrates different communication methods of a plurality of systems used on the intelligent substation so as to meet different requirements. The precise unified time standard is provided by synchronizing time through the IRIG-B codes so that precise time of each filed collection unit of the substation is synchronized. The novel intelligent substation breaker IED based on the ARM and the DSP is in accordance to development situation of an IEC 61850 system and power grids, and intellectualization, informatization, high reliability and low cost of the intelligent substation system are achieved.
Description
Technical field
The utility model belongs to intelligent substation on-line monitoring field, refers in particular to the on-line monitoring system of circuit breaker in the intelligent substation, and that be specifically related to is intelligent substation bay device circuit breaker IED.
Background technology
Primary cut-out is one of most important control and protection equipment in the electric power system, therefore guarantees that the reliability service of primary cut-out is very important.Electric power system need be carried out in real time breaker apparatus, on-line monitoring at a high speed, to improve the circuit breaker reliability of operation.Increasingly sophisticated along with the modern power network structure; Capacity constantly enlarges; Transinformation content increases at double in real time; And the continuous popularization of IEC61850 in transformer station, the structure of intelligent substation has had breakthrough variation, needs novel intelligent electronic equipment (IED) to satisfy the requirement of intelligent substation equipment automatization, information variation and communication standardization.The utlity model has powerful real-time monitoring capacity, the communication capacity that processing capacity rapidly and efficiently and high speed are stable; Adopt powerful two CPU to handle, make the service behaviour of original intelligent substation on-line monitoring that significant improvement arranged, improved the fail safe and the stability of intelligent substation operation greatly.System all has novelty in operation principle design, system design, data transmission.
The utility model content
The purpose of the utility model provides a kind of novel intelligent substation breakers IED; In real time, the accurate and Monitoring Data that the multi-circuit breaker local supervising and measuring equipment is uploaded at a high speed sends the station level server to, the data communication between coordination completion and circuit breaker local supervising and measuring equipment and the station level server.
The technical scheme of the utility model is following:
A kind of novel intelligent substation breakers IED based on ARM+DSP, the dual-cpu structure of employing ARM+DSP comprises power module, CAN bus, 485 buses, RS232 interface, Ethernet interface, Wifi communication interface and SD card simultaneously; The dual-cpu structure of said ARM+DSP is by ARM and DSP is two-way connects and composes; Said ARM goes up two-way Wifi module, RTC module, USB, first watchdog circuit, RS232 module and the Ethernet interface of being connected with, Connection Service device on this Ethernet interface; Be connected with SDRAM, FLASH, second watchdog circuit, JTAG, CAN bus and 485 buses on the said DSP; Said CAN bus is connected with local supervising and measuring equipment with 485 buses.
Said CAN bus adopts the inner integrated CAN isolation and the chip CTM8251A of CAN transceiving device.
The enhancement mode RS 485 transceiver ADM2483 that said 485 telecommunication circuits adopt band to isolate.
Said Ethernet interface is made up of Fast Ethernet mac controller DM9000BI and RJ45 connector HR911103A; The ethernet mac controller adopts single-chip Fast Ethernet mac controller to be connected with primary processor.
Said power module is directly introduced 220V voltage; A 2A fuse connects the 3rd pin of AC/DC power supply LH15-10D0512-04; The 7th pin output+12V voltage; The 5th pin output+5V voltage, and each inserts the TVS pipe of polar capacitor, 10 μ F decoupling capacitors and the 14V of one 470 μ F on two pins.
The said first watchdog circuit chip adopts the MAX811 of MAXIM company.
The said second watchdog circuit chip adopts CAT1832.
Said 485 network interfaces are connected with primary processor with the hyper tape buffer circuit, adopt build-out resistor and TVS protection of pipe device when being connected with physical port.
Said CAN network interface is characterized in that the CAN transceiver is connected with primary processor with the hyper tape buffer circuit, adopts build-out resistor and TVS protection of pipe device when being connected with physical port.
The utility model adopts the dual-cpu structure of ARM9 chip S3C2440A and dsp chip TMS320F28335; With two CPU is the control core, builds respectively in the periphery to comprise CAN network interface, 485 network interfaces, RS232 interface, Ethernet interface, Wifi, SD card, house dog and outside extended menory.The utility model adopts 485 STD buss transmission IRIG-B coded signal to realize the strange land high-precise synchronization sampling of circuit breaker local supervising and measuring equipment; And in this circuit breaker IED, take into full account the interference of electromagnetic interference, when power unit designs each supply line has been carried out the subregion isolation equipment.
It is 5V and subsequent use 12V voltage with the alternating current 220V voltage transitions that said circuit breaker IED power unit adopts AC/DC power supply chip LH15-10D0512-04.5V voltage converts 3.3V into through linear voltage stabilization chip MIC29502BU, supplies with other electricity consumption devices on CAN network interface circuit, ethernet network interface and the circuit breaker IED.3.3V voltage is regulated chip LM1117-ADJ through linear voltage and is converted 1.5V and 1.9V into, gives DSP kernel and Wifi power supply respectively.3.3V voltage provides the 5V insulating power supply to supply power to 485 network interfaces through insulating power supply chip B0305.
Said CAN network interface carries primary processor that the CAN controller forms and the signalling channel between the physics CAN bus by high-speed CAN bus transceiver CTM8251A and dsp chip; And, adopt the TVS pipe effectively overvoltage to be impacted and shield in the build-out resistor in 1 120 Europe of physical bus two ends parallel connections.
Said 485 network interfaces are that the enhancement mode RS-485 transceiver that the band of ADM2483 is isolated constitutes the serial ports of primary processor and the communication port between the bus by model; And, adopt the TVS pipe effectively overvoltage to be impacted and shield in the build-out resistor in 1 120 Europe of 485 bus two ends parallel connections.
Said RS232 interface is to be the master controller that constitutes of the serial port logic level transferring chip of MAX3232ESE and the communication port of outside serial equipment by model.
Primary processor that said Ethernet interface is made up of Fast Ethernet mac controller DM9000BI and RJ45 connector HR911103A and the signalling channel between the external ethernet equipment,
Said Wifi adopts the U65681 module, as the spare communication module, realizes the radio communication with other nodes.
Said SD card adopts 11 pin decks, and memory size is 4G.
Said external memory storage adopts large flash memory AT24C32, and 32768 serial EEPROM is provided, and realizes the memory function of significant data.
The house dog of said ARM chip is adopted MAX811, is used for the power monitoring and the control circuit of processor, prevents to crash or program fleet.
The house dog of said dsp chip is adopted CAT1832, after power-fail, restarts microprocessor.
Advantage of the utility model and effect:
Many communication modes that the utility model of this circuit breaker IED is used intelligent substation are incorporated into together; Adapt to various local supervising and measuring equipment; Adopt the mode of wire transmission to realize data communication and control between each circuit breaker local supervising and measuring equipment and the IED, overcome the electromagnetic interference problem under transformer station's hyperbaric environment.Adopt the structure of two CPU; And the IRIG-B sign indicating number to the time accurate unified time benchmark is provided; Satisfy the demand of intelligent substation communication real-time and high speed property, guarantee reliability of data transmission and real-time, realized intellectuality, informationization, high reliability and the low cost of intelligent substation system.Meet the requirement of IEC61850 system and intelligent grid,, thereby have the important social meaning for the realization and the development of electric substation automation system provides advanced appointed condition.
Description of drawings
Fig. 1 is the entire system Organization Chart of the utility model;
Fig. 2 is the hardware block diagram of the utility model;
Fig. 3 is the power supply power supply block diagram of the utility model;
Fig. 4 is the memory circuitry schematic diagram of the utility model;
Fig. 5 is the CAN bus interface circuit schematic diagram of the utility model;
Fig. 6 is the 485 bus interface circuit schematic diagrams of the utility model;
Fig. 7 is the wifi interface circuit schematic diagram of the utility model;
Fig. 8 is the RS232 interface circuit schematic diagram of the utility model;
Fig. 9 is the ethernet interface circuit schematic diagram of the utility model;
Figure 10 is the power unit circuit theory diagrams of the utility model;
Figure 11 is the SD card circuit theory diagrams of the utility model;
Figure 12 is the watchdog circuit schematic diagram of the ARM chip of the utility model;
Figure 13 is the watchdog circuit schematic diagram of the dsp chip of the utility model;
Figure 14 is the program flow diagram of the utility model.
Embodiment
Specific embodiments in the face of the utility model is described in detail down.
As shown in Figure 1, whole system mainly is made up of remote monitoring client, server, circuit breaker IED, circuit breaker local supervising and measuring equipment.The circuit breaker local supervising and measuring equipment is accomplished the collection of the information such as on/off switch coil current, three-phase current, shift value, auxiliary node and current of electric of respective circuit breakers in real time; Circuit breaker IED regularly sends the corresponding command to the circuit breaker local supervising and measuring equipment; After the circuit breaker local supervising and measuring equipment is resolved the order of being received; Real-time Monitoring Data packing is sent to circuit breaker IED through the CAN bus; Carried out analysis and arrangement and upload onto the server through Ethernet to data by circuit breaker IED, server carries out analyzing and processing through expert software to uploading data, utilizes various revised theory models, result of the test and result of field running to judge the operation conditions of circuit breaker; In time provide pre-alarm information, effectively prevent the generation of circuit breaker accident.
As shown in Figure 2, circuit breaker IED is the intelligent substation bay device, and it is realized and the data communication of circuit breaker field monitoring unit through the CAN bus, realize communicating by letter through Ethernet with data in server, through 485 buses realization B sign indicating number to the time signal transmission.Circuit breaker IED in time carries out data processing for the Surveillance center of host computer through Network Transmission the data that obtain on the one hand; On the other hand effective numerical value is stored in the high-capacity flash memory that is difficult for losing.Below each part is described in detail:
(1) centralized control unit
Centralized control unit adopts the dual-cpu structure of ARM9 chip S3C2440A and dsp chip TMS320F28335, and power consumption is lower, the system development that suitable procedure quantity is bigger.Concerning native system, reduced hardware complexity and system power dissipation, improved the stability of a system.Consider that the real-time requirement of system handles and the baud rate of serial port communication have problems, the clock of dsp controller is provided by the 30MHz crystal oscillator.
(2) data memory module.
As shown in Figure 4, memory chip selects for use Atmel company in the large flash memory AT24C32 of new generation that releases, and it provides 32,768 serial EEPROM.This chip is needs+3.3V power supply and support the bidirectional data transfers agreement only.At the pull-up resistor that the 5th pin and the 6th pin of chip respectively adds a 10K, make the transmission more stable of signal.
(3) CAN telecommunication circuit
As shown in Figure 5; In order to reduce power consumption and to simplify circuit; Therefore adopt all essential CAN inner integrated and isolate and the chip CTM8251A of CAN sending and receiving device, its major function is that major function is that logic level transition with the CAN controller is the differential level of CAN bus and the isolation features with DC 2500V.Build-out resistor in the 6th pin, 1 120 Europe of the 7th pin parallel connection, two pins respectively connect a TVS pipe, and effectively impact shields to overvoltage.As relay indicating light, indicator light dodges the state of going out always in exchanges data at the light-emitting diode of the 3rd pin, the 4th pin parallel connection one band current-limiting resistance.
(4) 485 telecommunication circuits
As shown in Figure 6, in order to reduce power consumption and to simplify circuit, the enhancement mode RS 485 transceiver ADM2483 that therefore adopt band to isolate.ADM2483 not be used in that A, B two line affixs draw, pull down resistor, real realization the RS485 chip of single-chip.The 1st pin meets logical end power supply+3.3V, and the 16th pin meets bus end insulating power supply+5V.The 2nd pin, the 8th pin are logical end power supply ground, and the 9th pin, the 15th pin are bus end power supply ground.The build-out resistor in the 12nd pin, 1 120 Europe of the 13rd pin parallel connection, two pins respectively connect a TVS pipe, and effectively impact shields to overvoltage.As relay indicating light, indicator light dodges the state of going out always in exchanges data at the light-emitting diode of the 3rd pin, the 6th pin parallel connection one band current-limiting resistance.
(5) ethernet communication circuit
As shown in Figure 9, the ethernet communication circuit is made up of Fast Ethernet mac controller DM9000BI and RJ45 connector HR911103A.DM9000BI is a fully-integrated single-chip Fast Ethernet mac controller, can be easy to transplant the port drivers under any system.The passive crystal oscillator of the 43rd pin and the external 25MHZ of the 44th pin, the 10th pin to the 31 pins are connected with ARM as data/address bus, and the 34th pin is that interrupt pin is connected with ARM, and the 35th pin and the 36th pin are as the read-write control pin of chip.The inner institute of the 9th pin of HR911103A and the 10th pin indicator light that connects indication Ethernet operating state, the 11st pin and the 12nd pin inner the indicator light that connects indicate the communications status of Ethernet.HR911103A the 1st pin, the 2nd pin, the 7th pin, the 8th pin all are connected in series the pull down resistor in 50 Europe and the filter capacitor of 10 μ F, make that the signal transmission is more stable.
(6) power-supplying circuit
Like Fig. 3 and shown in Figure 10; The outside 220V voltage of directly introducing of system; A 2A fuse connects the 3rd pin of AC/DC power supply LH15-10D0512-04; The 7th pin output+12V voltage, the 5th pin output+5V voltage, and each inserts the TVS pipe of polar capacitor, 10 μ F decoupling capacitors and the 14V of one 470 μ F on two pins.Because 12V voltage is standby voltage, so the load that adds a 1K at the 7th pin prevents the chip heating.And the light-emitting diode that current-limiting resistance is with in parallel connection one behind the 5th pin is as the power work indicator light.
3.3V voltage is 5V voltage wiring property stabilized voltage power supply chip MIC29502BU conversion gained.The 2nd pin of MIC29502BU connects+5V voltage, and adds two of the decoupling capacitors of 10 μ F and 0.1 μ F at the 2nd pin place; The 4th pin output 3.3V power supply of MIC29502BU.And add two of 10 μ F and 0.1 μ F decoupling capacitors equally at the 4th pin place, and at the light-emitting diode of the one band current-limiting resistance of parallel connection thereafter as the power work indicator light.
1.9V and the 1.5V power supply is that 3.3V voltage is through linear stabilized power supply chip LM1117-ADJ conversion gained; This chip can be through the required voltage value within the output certain limit; The 3rd pin of LM1117-ADJ is input power supply 3.3V; Through the difference of the 1st pin institute connecting resistance, the 2nd pin can be exported corresponding 1.9V and 1.5V power supply.And add the decoupling capacitor of 10 μ F at the 2nd pin and the 3rd pin place.
(6) watchdog circuit
Shown in figure 12, the ARM watchdog chip adopts the MAX811 of MAXIM company.MAX811 is power monitoring and the control circuit that is used for microprocessor system.Can be CPU provides reset signal, house dog supervision, reserve battery automatic switchover and power-fail to keep watch on.Except that under last, the power loss condition for microprocessor provide reset, these devices also have the reserve battery handoff functionality, to guarantee under power-down conditions, keeping power supply to the device that does not allow to cut off the power supply.MAX811 is that central processing unit provides reset signal, simultaneously the program running situation of Surveillance center's processor.It is connected with master controller through 2 lead-in wires; The RST pin provides the reset signal of center processor, and WD provides the reset signal of WatchDog Timer, in 1.6s, does not have a dog timer reset signal to arrive; Its master controller that just resets so just prevents to crash or program fleet.
Shown in figure 13, the DSP watchdog chip adopts CAT1832.After power-fail, restart microprocessor, and go to tremble for manually operated microprocessor reset switch.The 2nd pin is a house dog time out period base pin selection, and when connecing 3.3V voltage, the house dog time out period is 1.2s, when the 7th leg signal in the house dog time out period saltus step does not take place, can produce a reset signal, makes cpu reset.
Above content is the further explain that combines concrete preferred implementation that the utility model is done; The embodiment that can not assert the utility model only limits to this; Those of ordinary skill for technical field under the utility model; Under the prerequisite that does not break away from the utility model design, can also make some simple deduction or replace, all should be regarded as belonging to the utility model and confirm scope of patent protection by claims of being submitted to.
Claims (9)
1. novel intelligent substation breakers IED based on ARM+DSP; It is characterized in that; Adopt the dual-cpu structure of ARM+DSP, comprise power module, CAN bus, 485 buses, RS232 interface, Ethernet interface, Wifi communication interface and SD card simultaneously; The dual-cpu structure of said ARM+DSP is by ARM and DSP is two-way connects and composes; Said ARM goes up two-way Wifi module, RTC module, USB, first watchdog circuit, RS232 module and the Ethernet interface of being connected with, Connection Service device on this Ethernet interface; Be connected with SDRAM, FLASH, second watchdog circuit, JTAG, CAN bus and 485 buses on the said DSP; Said CAN bus is connected with local supervising and measuring equipment with 485 buses.
2. according to claim 1 based on the novel intelligent substation breakers IED of ARM+DSP, it is characterized in that said CAN bus adopts the inner integrated CAN isolation and the chip CTM8251A of CAN transceiving device.
3. according to claim 1 based on the novel intelligent substation breakers IED of ARM+DSP, it is characterized in that the enhancement mode RS 485 transceiver ADM2483 that said 485 telecommunication circuits adopt band to isolate.
4. according to claim 1 based on the novel intelligent substation breakers IED of ARM+DSP, it is characterized in that said Ethernet interface is made up of Fast Ethernet mac controller DM9000BI and RJ45 connector HR911103A; The ethernet mac controller adopts single-chip Fast Ethernet mac controller to be connected with primary processor.
5. according to claim 1 based on the novel intelligent substation breakers IED of ARM+DSP; It is characterized in that; Said power module is directly introduced 220V voltage, and a 2A fuse connects the 3rd pin of AC/DC power supply LH15-10D0512-04, the 7th pin output+12V voltage; The 5th pin output+5V voltage, and each inserts the TVS pipe of polar capacitor, 10 μ F decoupling capacitors and the 14V of one 470 μ F on two pins.
6. according to claim 1 based on the novel intelligent substation breakers IED of ARM+DSP, it is characterized in that the said first watchdog circuit chip adopts the MAX811 of MAXIM company.
7. according to claim 1 based on the novel intelligent substation breakers IED of ARM+DSP, it is characterized in that the said second watchdog circuit chip adopts CAT1832.
8. according to claim 1 based on the novel intelligent substation breakers IED of ARM+DSP, it is characterized in that said 485 network interfaces are connected with primary processor with the hyper tape buffer circuit, adopt build-out resistor and TVS protection of pipe device when being connected with physical port.
9. according to claim 1 based on the novel intelligent substation breakers IED of ARM+DSP; It is characterized in that; Said CAN network interface is characterized in that the CAN transceiver is connected with primary processor with the hyper tape buffer circuit, adopts build-out resistor and TVS protection of pipe device when being connected with physical port.
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| CN2011202887810U CN202206427U (en) | 2011-08-10 | 2011-08-10 | Novel intelligent substation breaker intelligent electronic device (IED) based on advanced reduced instruction set computer machine (ARM) and digital signal processor (DSP) |
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| CN2011202887810U CN202206427U (en) | 2011-08-10 | 2011-08-10 | Novel intelligent substation breaker intelligent electronic device (IED) based on advanced reduced instruction set computer machine (ARM) and digital signal processor (DSP) |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102759706A (en) * | 2012-06-25 | 2012-10-31 | 广西电网公司电力科学研究院 | Circuit breaker electrical endurance diagnosis system |
| CN103377081A (en) * | 2012-04-27 | 2013-10-30 | 沈阳高精数控技术有限公司 | Implementation method for interrupt mechanism between embedded numerical control system dual-core chip and peripheral |
| WO2014044024A1 (en) * | 2012-09-19 | 2014-03-27 | 国家电网公司 | 800kv intelligent circuit breaker |
| CN103956830A (en) * | 2014-04-30 | 2014-07-30 | 罗格朗低压电器（无锡）有限公司 | Intelligent controller of molded case circuit breaker capable of communication |
| CN104300676A (en) * | 2014-09-02 | 2015-01-21 | 国网安徽省电力公司阜阳供电公司 | On-line monitoring system suitable for capacitive device of intelligent substation |
| CN106612064A (en) * | 2015-10-20 | 2017-05-03 | 中车大连电力牵引研发中心有限公司 | Converter control circuit, converter and data interaction method |
| CN107678337A (en) * | 2017-09-28 | 2018-02-09 | 卡斯柯信号有限公司 | A kind of main control unit structure for being used to control track traffic signal |
| CN108279614A (en) * | 2018-03-21 | 2018-07-13 | 江苏久创电气科技有限公司 | A kind of intelligent online monitoring device and transformer substation system applied to substation |
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- 2011-08-10 CN CN2011202887810U patent/CN202206427U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103377081A (en) * | 2012-04-27 | 2013-10-30 | 沈阳高精数控技术有限公司 | Implementation method for interrupt mechanism between embedded numerical control system dual-core chip and peripheral |
| CN103377081B (en) * | 2012-04-27 | 2017-02-08 | 沈阳高精数控智能技术股份有限公司 | Implementation method for interrupt mechanism between embedded numerical control system dual-core chip and peripheral |
| CN102759706A (en) * | 2012-06-25 | 2012-10-31 | 广西电网公司电力科学研究院 | Circuit breaker electrical endurance diagnosis system |
| WO2014044024A1 (en) * | 2012-09-19 | 2014-03-27 | 国家电网公司 | 800kv intelligent circuit breaker |
| CN103956830A (en) * | 2014-04-30 | 2014-07-30 | 罗格朗低压电器（无锡）有限公司 | Intelligent controller of molded case circuit breaker capable of communication |
| CN103956830B (en) * | 2014-04-30 | 2016-01-06 | 罗格朗低压电器（无锡）有限公司 | The intelligent controller of communicable plastics casing circuit breaker |
| CN104300676A (en) * | 2014-09-02 | 2015-01-21 | 国网安徽省电力公司阜阳供电公司 | On-line monitoring system suitable for capacitive device of intelligent substation |
| CN106612064A (en) * | 2015-10-20 | 2017-05-03 | 中车大连电力牵引研发中心有限公司 | Converter control circuit, converter and data interaction method |
| CN107678337A (en) * | 2017-09-28 | 2018-02-09 | 卡斯柯信号有限公司 | A kind of main control unit structure for being used to control track traffic signal |
| CN108279614A (en) * | 2018-03-21 | 2018-07-13 | 江苏久创电气科技有限公司 | A kind of intelligent online monitoring device and transformer substation system applied to substation |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120425 |