CN201846138U - Breaker intelligent assembly based on unified section data acquisition - Google Patents
Breaker intelligent assembly based on unified section data acquisition Download PDFInfo
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- CN201846138U CN201846138U CN201020613074XU CN201020613074U CN201846138U CN 201846138 U CN201846138 U CN 201846138U CN 201020613074X U CN201020613074X U CN 201020613074XU CN 201020613074 U CN201020613074 U CN 201020613074U CN 201846138 U CN201846138 U CN 201846138U
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Abstract
The utility model discloses a breaker intelligent assembly based on unified section data acquisition, which comprises a chassis. A bus back plate is arranged in the chassis. The breaker intelligent assembly is characterized in that core plug-ins CPUS (central processing units), a power supply plug-in, a power frequency signal acquisition plug-in, an operation loop plug-in, a state monitoring acquisition plug-in and a combination unit plug-in are inserted on the bus back plate; and the core plug-ins CPUS are respectively communicated with the power supply plug-in, the power frequency signal acquisition plug-in, the operation loop plug-in, the state monitoring acquisition plug-in and the combination unit plug-in. The breaker intelligent assembly is provided with an integrated device which realizes various functions and application in a 6U and 1/2 chassis structure, can carry out unified section data acquisition, provides a data set for a transformer substation panoramic database, provides the complete single-device solution for safety operation of a breaker, and effectively saves the equipment investment; the safety operation of the breaker is ensured, the service life of equipment is prolonged and the shutdown overhauling times is reduced.
Description
Technical field
The utility model belongs to electrical technology field, and the utility model relates to a kind of comprehensive integrated device of protection, observing and controlling, status monitoring and circuit breaker digitlization input and output of the circuit breaker towards 35KV and following electric pressure more precisely.
Background technology
Along with emphasis investment and the construction of State Grid Corporation of China to intelligent grid, and the requirement of 12 planning intellectuality proposes to primary equipment " measuring digitlization, Control Networkization, status visualization, function integration and information interactionization ", intelligent substation needs overall collection and analysis to circuit breaker operating condition data, reaches breaker apparatus and carries out the transition to real time on-line monitoring and trouble hunting from interruption maintenance.
Traditional digital relay and monitoring integrated apparatus towards circuit breaker is widely-used, but towards object mainly be the power frequency component of electrical network; The state monitoring apparatus of traditional circuit breaker is also progressively being promoted the use of, and its function limitation is in breaker body information; At present to use be two kind of means independent operatings separately to engineering basically, and information is not mutual, and the semaphore markers disunity of gathering, for the panorama data of circuit breaker are obtained and analysis, operation monitoring and accident analysis are made troubles.Simultaneously conventional apparatus considers it more is that basic function is used, and shortcoming is considered in aspects such as the network service of breaker controller, IEC61850 information modeling, digitizing function.
Document one " intellectual breaker controller " (Chinese patent application number 200920227462.1) has disclosed a kind of hardware system framework of intellectual breaker controller; adopted the system architecture of ARM+DSP; system's frame designs basically the still design philosophy of traditional microcomputer protecting controller; AD samples+opens into leaving signal+liquid crystal+communication management; the outer synchronized sampling that does not relate to data is unified profile data, and Design of device is not considered digitlization output and the network G OOSE tripping operation solution of intelligent substation to equipment yet.
It is the signal pickup assembly of main controller based on TMS320F206 that document two " based on the primary cut-out comprehensive on-line monitoring apparatus of DSP " (Yi Hui etc. " high-voltage electrical apparatus " 2007.2) has been introduced a kind of, travel displacement, divide-shut brake coil current voltage, vibration signal, the dielectric characteristic of the moving contact by gathering circuit breaker are come the operating state of comprehensive assessment circuit breaker and are calculated electric life and estimate.This class apparatus function is more single, only does circuit-breaker status monitoring, can use on the breaker apparatus in voltage levels transformer station, but low-pressure field especially in the 10KV switch cubicle since in the cabinet space and Financial cost factor can not be used widely.
The utility model content
Technical problem to be solved in the utility model is to provide a kind of circuit breaker intelligent assembly, possess and in 6U, 1/2 casing structure, realize the integration unit that multiple function is used, unified profile data collection, for transformer station's panorama database provides data set, for the safe operation of circuit breaker provides complete single device solves scheme.
For solving the problems of the technologies described above, the utility model provides a kind of circuit breaker intelligent assembly of gathering based on unified profile data, comprise cabinet, in cabinet, be provided with the bus type backboard, it is characterized in that: be plugged with core inserter CPUS, power insert, power frequency component collection plug-in unit, operation circuit plug-in unit, status monitoring collection plug-in unit, merge cells plug-in unit on the bus type backboard, described core inserter CPUS gathers plug-in unit with power insert, power frequency component collection plug-in unit, operation circuit plug-in unit, status monitoring respectively, the merge cells plug-in unit communicates.
The aforesaid circuit breaker intelligent assembly of gathering based on unified profile data is characterized in that: the FPGA collecting unit that described core inserter CPUS comprises communication management unit PPC, communicate with the communication management unit, the DSP arithmetic element that communicates with the FPGA collecting unit.
The aforesaid circuit breaker intelligent assembly of gathering based on unified profile data, it is characterized in that: communication management unit PPC comprises 2 100,000,000 ether light mouths, 3 100,000,000 electricity mouths, described two electricity mouths are MMS communication Ethernet mouth, communicate by letter with upper managing computer with IEC61850 communication protocol; Two light mouths are GOOSE communication Ethernet mouth, are responsible for the GOOOSE real-time packet and handle, and the intelligent terminal function is finished in implement device interlocking and breaker tripping and closing operation, comprise that also an inner ether electricity mouth is used for the communication with liquid crystal CPU.
The aforesaid circuit breaker intelligent assembly of gathering based on unified profile data is characterized in that: described DSP respectively with power insert in open into leaving module and the operation circuit plug-in unit communicates mutually.
The aforesaid circuit breaker intelligent assembly of gathering based on unified profile data, it is characterized in that: described FPGA collecting unit is accepted sampling and the data that power frequency component is gathered plug-in unit, accepting 32 tunnel outsides of DSP arithmetic element collection simultaneously opens into signal, receive outside B sign indicating number to the time signal, and by local decode extraction pulse per second (PPS), Synchronous Sampling Pulse, per half cycle of FPGA calculates the first-harmonic vector of all passages simultaneously, connection is with markers to deposit the buffering area of 4 cycle storage depths together in giving birth to data (sampled value), by local 16 bit data bus modes the AD data is distributed to communication management unit PPC and DSP arithmetic element.
The aforesaid circuit breaker intelligent assembly of gathering based on unified profile data, it is characterized in that: described cabinet is standard 6U, 1/2 cabinet.
The aforesaid circuit breaker intelligent assembly of gathering based on unified profile data, it is characterized in that: the data interaction passage between described communication management unit PPC and the DSP arithmetic element is the dual port RAM form.
The aforesaid circuit breaker intelligent assembly of gathering based on unified profile data, it is characterized in that: described merge cells plug-in unit comprises communication CPU, the sampled data that the 2nd FPGA of merge cells plug-in unit acceptance is synchronously sent by differential bus by the FPGA collecting unit of core inserter CPUS, send communication CPU to through arrangement, send or send by the serial optical fiber port to the process layer network according to IEC 61850-9-2 standard with IEC 60044-8 agreement by communication CPU decision.
The aforesaid circuit breaker intelligent assembly of gathering based on unified profile data is characterized in that: described status monitoring is gathered plug-in unit and is comprised that 6 isolate sampling circuits (4～20mA) and 9 road optical fiber temperature-measurement modules.
The beneficial effect that reaches of the present utility model: the utility model possesses realizes the integration unit that multiple function is used in 6U, 1/2 casing structure, unified profile data collection, for transformer station's panorama database provides data set, for the safe operation of circuit breaker provides complete single device solves scheme, effectively save equipment investment, guarantee the safe operation of circuit breaker and improve the equipment operation life-span minimizing interruption maintenance number of times.
Description of drawings
Fig. 1 is a device casing structure front view of the present utility model.
Fig. 2 is a device casing structure profile of the present utility model.
Fig. 3 is a circuit breaker intelligent assembly hardware principle block diagram.
Fig. 4 is the status monitoring function block diagram of circuit breaker intelligent assembly.
Fig. 5 is circuit breaker intelligent assembly device terminals definition figure.
Fig. 6 is a function diagram of the present utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is described further.
Fig. 1 and Fig. 2 have illustrated the cabinet size and the structure of this device.
The circuit breaker intelligent assembly has adopted standard 6U, the design of 1/2 casing structure, the apparatus structure characteristics are: adopt backboard preposition, the device scheme of inserting behind the feature card, the reasonable Arrangement feature card comprises that bus type backboard, power insert (comprise and open functional module), core inserter CPUS(comprise communication management unit PPC, FPGA collecting unit, DSP arithmetic element), power frequency component gathers plug-in unit, operation circuit plug-in unit, status monitoring and gathers plug-in unit, merge cells plug-in unit, display unit (being fixed on the door-plate).
Circuit breaker intelligent assembly software and hardware function comprises 7 big functional modules:
Data acquisition and main control module: the FPGA(XC3SD1800A that selects the big capacity RAM of band DSP kernel for use), its function comprises: 16 AD(MAX11046 that are responsible for 48 passages with the sample rate of 4KHz) sampling and data are accepted work, are responsible for accepting the DSP arithmetic element simultaneously and open into signal with 32 tunnel outsides of 2KHz sampling rate collection; Receive outside B sign indicating number (optical fiber or 485 modes) simultaneously, and extract pulse per second (PPS), Synchronous Sampling Pulse by local decode.Per half cycle of FPGA (10MS) calculates the first-harmonic vector of all passages in addition, connection is with markers to deposit the buffering area of 4 cycle storage depths together in giving birth to data (sampled value), by local 16 bit data bus modes the AD data is distributed to communication management unit PPC and DSP arithmetic element.Provide data interaction passage between PPC and the DSP arithmetic element with the form of dual port RAM; Provide backboard 6 pairs of redundant differential bus, communicate by letter with the intelligent plate of speed and other of 10M.
The protection control module: mainly by DSP arithmetic element and power frequency component gather plug-in unit, open into leave module, the operation circuit plug-in unit is finished, and finishes the defencive function and the observing and controlling function of a circuit.
The communication management module: PPC finishes by the communication management unit, comprises 2 100,000,000 ether light mouths, 3 100,000,000 electricity mouths; Wherein two electricity mouths are MMS communication Ethernet mouth, communicate by letter with upper managing computer with IEC61850 communication protocol; Two light mouths are GOOSE communication Ethernet mouth, are responsible for the GOOOSE real-time packet and handle, and the intelligent terminal function is finished in implement device interlocking and breaker tripping and closing operation.An inner ether electricity mouth is used for the communication with liquid crystal CPU.
Merge cells module: main) finishes by the communication CPU(MCF5274 on the merge cells card; The sampled data that the acceptance synchronously of the 2nd FPGA on this card is sent by differential bus by the master control FPGA on the main core board, send MCF5274 to through arrangement, send or send by the serial optical fiber port to the process layer network with the SAV9-2 form with IEC 60044-8 agreement by the MCF5274 decision.
State monitoring module: finish by the status monitoring plate; This plate designed 6 isolate sampling circuits (4～20mA) and 9 road optical fiber temperature-measurement modules, by to being installed in the collecting sensor signal on the breaker body, can realize power supply, the current surveillance of energy storage motor; The monitoring of circuit breaker action divide-shut brake coil current; Circuit breaker energy-stored spring pressure monitoring; The monitoring of moving contact of breaker operational stroke; The contact of breaker temperature monitoring.By data analysis circuit breaker is carried out state estimation and residual electricity life estimation.
Unified section real-time data record module: mainly finish by communication management unit PPC and FPGA.Because FPGA stamps absolute time (synchronous based on the B sign indicating number) hardware markers to each sampled data set, communication management unit PPC can be to steady state data during according to band the target form to the synchronous vectorial device of PMU() send.Communication management unit PPC is embedded real-time failure wave-recording software, can be according to the signal of the type of analog channel and switch as record ripple entry condition, the Temporal Data when thereby the record circuit-breaker status changes, the file of formation comtrade form is convenient to playback afterwards and accident analysis.
Man-machine administration module: be responsible for by a CPU who possesses TFT, network communication interface, with the Color Liquid Crystal Display data of 480 * 272 pins.
Fig. 3 is a hardware designs schematic diagram of the present utility model.Use relevant nearly all function because this circuit breaker intelligent assembly is integrated with killer switch cabinet object; comprise protection, observing and controlling, status monitoring, intelligent terminal, digitlization output; add the restriction in casing structure space, hardware designs has been proposed higher requirement.Consider the unified profile data collection of intelligent assembly, the big and real-time requirement of data volume, device has adopted the multi-CPU system solution.Core mainboard CPUS has born most of functions such as data acquisition, computing, storage, communication, logical operation.
Core inserter CPUS has used the professional communication CPU-MPC8313 with 300MHz dominant frequency, possesses 2 gigabit ethernet interfaces, 3 PCI network interface cards, the NAND memory device of 1Gz byte.MPC8313 is the data centralized control center of intelligent assembly, is responsible for the operation information of circuit breaker by him and outwards issues and install the real-time, interactive of internal data.MPC8313 has used the real-time vxworks operating system of high reliability in the industrial circle, has guaranteed the real-time performance of data processing.In the MPC8313 software architecture, adopted the IEC61850 information modeling, used the icd configuration file, according to IEC61850 stipulations and extraneous communication.Be embedded in the failure wave-recording logging modle of high-priority task at the MPC8313 software frame, receive sampled data and the synchronous vector sent by FPGA in real time, according to channel type configuration and start definite value and calculate various entry conditions, the transient state and the dynamic process of whole system when unusual takes place in the real time record circuit breaker.Be embedded in the status monitoring analysis task of low priority at the MPC8313 software frame, extracted recorder data and steady-state quantity, calculated and analyzed the bulk state of circuit breaker.
Core inserter CPUS has used the DSP-TMS320F28335 with 150MHz dominant frequency, and this DSP finishes the protection observing and controlling function of assembly.Defencive function comprises: the syllogic current protection of low-voltage and direction locking, three-phase single shot reclosing, combined floodgate post acceleration, low-frequency low-voltage load shedding, busbar grounding alarm, zero sequence direction alarm, the alarm of PT broken string, CT loop abnormality alarming, breaker failure alarm, the alarm of control loop broken string etc.The observing and controlling function comprises: remote measurement (Ua, Ub, Uc, Uab, Ubc, Uca, Ia, Ib, Ic, P, Q, F, COS, 3U0,3I0), remote signalling (32 tunnel), remote control (3 tunnel), mains by harmonics monitor (total percent harmonic distortion THDu of monitor voltage and the total percent harmonic distortion THDi of electric current, monitor voltage 2～19 subharmonic containing ratio HRUk and electric current 2～19 subharmonic containing ratio HRIk).
Core inserter CPUS has used the FPGA(XC3SD1800A with DSP kernel).Intelligent assembly makes full use of hardware parallel processing capability and the hardware capability restructural mechanism of FPGA, take internal clocking with outside to the time clock synchronization mechanism, the sampled data of unified section is shared to each CPU with data/address bus mode or backboard universal serial bus mode synchronously according to functional classification and demand, is to build the bridge of information communication between the CPU with dual port RAM and single port RAM mode simultaneously.
The explanation that Fig. 4 is comparatively detailed the status monitoring object of circuit breaker intelligent assembly, need to prove that transducer all is installed in the breaker body as angular displacement sensor, optical fiber temperature-measurement probe, the spring tension transducer of measuring stroke, it all is that mode with 4～20mA inserts (removing optical fiber temperature-measurement) that the external sensor signal of status monitoring plate inserts.4～20mA electric current loop can effectively improve the antijamming capability of signal and reduce the number of times of on-the-spot mis-wired.
The device terminals definition figure of Fig. 5 has illustrated the signaling interface that intelligent assembly is external clearly.P1 is the DIDC plug-in unit, and function is mainly generator power supply and 24 tunnel and opens into signal, the outlet of alarm signal relay.P2 is the CPUS plug-in unit.P3 is merge cells (MU) plug-in unit, and he is responsible for CPUS is outwards sent with SAV9-2 or IEC 60044-8 form by the sampled data that the backboard differential bus sends.P4 inserts Signal Spacing by the PT/CT instrument transformer for simulation AC plug-in unit.P5 is operation circuit and signal outlet plate, has comprised a dataway operation loop, 3 tunnel protection tripping operation outlets, and executable operations mechanism is selected in 3 tunnel remote controls.P6 is the status monitoring plug-in unit, and major function is that 9 road optical fiber temperature-measurement signals insert and the isolation of 6 tunnel 4～20mA signals inserts.
Below disclose the utility model with preferred embodiment, so it is not in order to restriction the utility model, and all employings are equal to replaces or technical scheme that the equivalent transformation mode is obtained, all drops within the protection range of the present utility model.
Claims (9)
1. circuit breaker intelligent assembly of gathering based on unified profile data, comprise cabinet, in cabinet, be provided with the bus type backboard, it is characterized in that: be plugged with core inserter CPUS, power insert, power frequency component collection plug-in unit, operation circuit plug-in unit, status monitoring collection plug-in unit, merge cells plug-in unit on the bus type backboard, described core inserter CPUS gathers plug-in unit with power insert, power frequency component collection plug-in unit, operation circuit plug-in unit, status monitoring respectively, the merge cells plug-in unit communicates.
2. the circuit breaker intelligent assembly of gathering based on unified profile data according to claim 1 is characterized in that: the FPGA collecting unit that described core inserter CPUS comprises communication management unit PPC, communicate with the communication management unit, the DSP arithmetic element that communicates with the FPGA collecting unit.
3. the circuit breaker intelligent assembly of gathering based on unified profile data according to claim 2, it is characterized in that: communication management unit PPC comprises 2 100,000,000 ether light mouths, 3 100,000,000 electricity mouths, described two electricity mouths are MMS communication Ethernet mouth, communicate by letter with upper managing computer with IEC61850 communication protocol; Two light mouths are GOOSE communication Ethernet mouth, are responsible for the GOOOSE real-time packet and handle, and the intelligent terminal function is finished in implement device interlocking and breaker tripping and closing operation, comprise that also an inner ether electricity mouth is used for the communication with liquid crystal CPU.
4. the circuit breaker intelligent assembly of gathering based on unified profile data according to claim 2 is characterized in that: described DSP respectively with power insert in open into leaving module and the operation circuit plug-in unit communicates mutually.
5. the circuit breaker intelligent assembly of gathering based on unified profile data according to claim 2, it is characterized in that: described FPGA collecting unit is accepted sampling and the data that power frequency component is gathered plug-in unit, accepting 32 tunnel outsides of DSP arithmetic element collection simultaneously opens into signal, receive outside B sign indicating number to the time signal, and by local decode extraction pulse per second (PPS), Synchronous Sampling Pulse, per half cycle of FPGA calculates the first-harmonic vector of all passages simultaneously, connection deposits the buffering area of 4 cycle storage depths in together with sampled value band markers, by local 16 bit data bus modes the AD data is distributed to communication management unit PPC and DSP arithmetic element.
6. the circuit breaker intelligent assembly of gathering based on unified profile data according to claim 1, it is characterized in that: described cabinet is standard 6U, 1/2 cabinet.
7. the circuit breaker intelligent assembly of gathering based on unified profile data according to claim 2, it is characterized in that: the data interaction passage between described communication management unit PPC and the DSP arithmetic element is the dual port RAM form.
8. the circuit breaker intelligent assembly of gathering based on unified profile data according to claim 2, it is characterized in that: described merge cells plug-in unit comprises communication CPU, the sampled data that the 2nd FPGA of merge cells plug-in unit acceptance is synchronously sent by differential bus by the FPGA collecting unit of core inserter CPUS, send communication CPU to through arrangement, send or send by the serial optical fiber port to the process layer network according to IEC 61850-9-2 standard with IEC 60044-8 agreement by communication CPU decision.
9. according to each described circuit breaker intelligent assembly of gathering based on unified profile data among the claim 1-8, it is characterized in that: described status monitoring is gathered plug-in unit and is comprised that 6 isolate sampling circuit and 9 road optical fiber temperature-measurement modules.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102291277A (en) * | 2011-08-09 | 2011-12-21 | 上海思源弘瑞自动化有限公司 | Automatic test system and method for intelligent substation spacing apparatus |
| CN102508467A (en) * | 2011-10-18 | 2012-06-20 | 中国西电电气股份有限公司 | Online monitoring system of switch equipment based on DSP (Digital Signal Processor) and FPGA (Field Programmable Gate Array) |
| CN102608494A (en) * | 2012-02-24 | 2012-07-25 | 国电南瑞科技股份有限公司 | Arc light monitoring intelligent component system and monitoring method for medium-low voltage switch of intelligent substation |
| CN103152136A (en) * | 2013-03-11 | 2013-06-12 | 南京因泰莱电器股份有限公司 | Method for receiving multipath IEC61850-9-2 sampling value in real time by using programmable logic device |
| CN103325627A (en) * | 2012-03-20 | 2013-09-25 | 深圳市金博联电力技术有限公司 | Fast and intelligent 10KV pole-mounted breaker |
| CN106597947A (en) * | 2016-12-23 | 2017-04-26 | 国网浙江宁波市鄞州区供电公司 | Substation equipment test method and system, server and tester |
| CN106663963A (en) * | 2015-05-06 | 2017-05-10 | 杨启蓓 | Smart multi-dimensional big data analyzing expert system for high-voltage circuit breaker in power grid |
| CN108572544A (en) * | 2018-04-23 | 2018-09-25 | 中电科技扬州宝军电子有限公司 | A kind of alternating current-direct current B code self-adaptings resolver and method |
| CN108775929A (en) * | 2018-08-09 | 2018-11-09 | 安徽亚辉电气自动化有限公司 | A kind of vacuum circuit breaker on-line monitoring system |
| CN112448481A (en) * | 2020-12-14 | 2021-03-05 | 南方电网科学研究院有限责任公司 | Time scale processing method and system based on multi-framework power distribution automatic terminal |
-
2010
- 2010-11-17 CN CN201020613074XU patent/CN201846138U/en not_active Expired - Lifetime
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102291277A (en) * | 2011-08-09 | 2011-12-21 | 上海思源弘瑞自动化有限公司 | Automatic test system and method for intelligent substation spacing apparatus |
| CN102291277B (en) * | 2011-08-09 | 2013-06-19 | 上海思源弘瑞自动化有限公司 | Automatic test system and method for intelligent substation spacing apparatus |
| CN102508467A (en) * | 2011-10-18 | 2012-06-20 | 中国西电电气股份有限公司 | Online monitoring system of switch equipment based on DSP (Digital Signal Processor) and FPGA (Field Programmable Gate Array) |
| CN102508467B (en) * | 2011-10-18 | 2014-03-12 | 中国西电电气股份有限公司 | Online monitoring system of switch equipment based on DSP (Digital Signal Processor) and FPGA (Field Programmable Gate Array) |
| CN102608494A (en) * | 2012-02-24 | 2012-07-25 | 国电南瑞科技股份有限公司 | Arc light monitoring intelligent component system and monitoring method for medium-low voltage switch of intelligent substation |
| CN103325627A (en) * | 2012-03-20 | 2013-09-25 | 深圳市金博联电力技术有限公司 | Fast and intelligent 10KV pole-mounted breaker |
| CN103152136A (en) * | 2013-03-11 | 2013-06-12 | 南京因泰莱电器股份有限公司 | Method for receiving multipath IEC61850-9-2 sampling value in real time by using programmable logic device |
| CN103152136B (en) * | 2013-03-11 | 2016-03-30 | 南京因泰莱电器股份有限公司 | A kind of method using programmable logic device real-time reception multichannel IEC61850-9-2 sampled value |
| CN106663963B (en) * | 2015-05-06 | 2019-04-09 | 杨启蓓 | Power grid high-voltage circuitbreaker various dimensions big data analysis intelligent expert system |
| CN106663963A (en) * | 2015-05-06 | 2017-05-10 | 杨启蓓 | Smart multi-dimensional big data analyzing expert system for high-voltage circuit breaker in power grid |
| CN106597947A (en) * | 2016-12-23 | 2017-04-26 | 国网浙江宁波市鄞州区供电公司 | Substation equipment test method and system, server and tester |
| CN106597947B (en) * | 2016-12-23 | 2020-05-29 | 国网浙江宁波市鄞州区供电公司 | Transformer substation equipment testing method, server, tester and system |
| CN108572544A (en) * | 2018-04-23 | 2018-09-25 | 中电科技扬州宝军电子有限公司 | A kind of alternating current-direct current B code self-adaptings resolver and method |
| CN108775929A (en) * | 2018-08-09 | 2018-11-09 | 安徽亚辉电气自动化有限公司 | A kind of vacuum circuit breaker on-line monitoring system |
| CN108775929B (en) * | 2018-08-09 | 2020-11-10 | 安徽亚辉电气自动化有限公司 | Vacuum circuit breaker on-line monitoring system |
| CN112448481A (en) * | 2020-12-14 | 2021-03-05 | 南方电网科学研究院有限责任公司 | Time scale processing method and system based on multi-framework power distribution automatic terminal |
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Granted publication date: 20110525 |