CN201887538U - Network intelligent type relay protector based on ADSP BF518 - Google Patents
Network intelligent type relay protector based on ADSP BF518 Download PDFInfo
- Publication number
- CN201887538U CN201887538U CN 201020184609 CN201020184609U CN201887538U CN 201887538 U CN201887538 U CN 201887538U CN 201020184609 CN201020184609 CN 201020184609 CN 201020184609 U CN201020184609 U CN 201020184609U CN 201887538 U CN201887538 U CN 201887538U
- Authority
- CN
- China
- Prior art keywords
- module
- adsp
- protective relaying
- type protective
- relaying device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- Y02E60/725—
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model relates to a network intelligent type relay protector based on ADSP BF518, aiming at solving the defects of complicated and redundant structure, low protection and measurement precision, poor network communication capacity, backward internetwork synchronization and the like of the conventional relay protector. With the ADSP-BF518 as a center, the network intelligent relay protector based on ADSP BF518 comprises a power supply module, an AC signal collection module, an input and output module, an FPGA module, a storage module, a communication module, a liquid crystal display module, a keyboard module and the like; the AC signal collection module performs current and voltage conversion and regulation on monitored AC signals, then synchronously samples through ADC and inputs the sampling results to DSP, and the DSP finishes operation, analysis and processing of various values. Whether a relay needs to be driven through the input and output module is determined after processing; and meanwhile, various communication modes (two industrial Ethernets, CAN, RS485, RS232 and the like) send monitoring results and protection action information to a management system or a host computer to coordinately finish the working procedure of protection and monitoring. The network intelligent type relay protector base on ADSP BF518 also supports IEEE 1588 precision network time protocols, and is suitable for relay protection and monitoring on transmission lines not higher than 110kV.
Description
Technical field
The present invention relates to the technical field of relay protection of digitalized electrical system; with mesolow distribution line microcomputer protective relay is application background; by protection and the measurement control that realizes the mesolow distribution line; multiple functions such as communication and demonstration; embodying ADSP BF518 processor is the real collection protection that realizes; measure; control; telemechanical and the high intelligence of multiple function in one such as communicate by letter; the standardization microcomputer protective relay device is given security; also strengthened simultaneously the high-performance of microcomputer protective relay equipment; low-cost; the advantage of low-power consumption is applicable to the relaying protection and the monitoring of the power transmission and transformation line that is not higher than 110kV.
Background technology
The China national electrical network make great efforts to make always have networking, the strong intelligent grid of the unification of automation, the clear and definite strategy of strong intelligent grid development and the construction plan of 10 years strong intelligent grids from now on of advancing stage by stage.An importance of electric network reconstruction and strong intelligent grid construction is to strengthen Self-Test Diagnostics, protection and the self-healing function of network; Utilities Electric Co. needs power line monitoring and protection system; monitor and control with consumption situation, cost and quality energy; and to protecting expensive equipment to protect, thereby make power supply be unlikely to be damaged by surge and harsh climate.
Relaying protection is an important technology of realizing electric power networks and relevant device monitoring and protecting; to computerization, networking, intellectuality; and protection, control, measurement and data communication integrative development be the long-run development trend in this field, simultaneously to the high-speed computation ability of device, improve the storage ability and various optimized Algorithm, high-accuracy data acquisition and reliability have proposed higher demand.In the face of new demand; at present relaying protection system exposes the problems such as expandability difference at relay protection device core processing scarce capacity and system hardware and software, thereby causes relay protection device complex structure redundancy, protection and defective and deficiency such as certainty of measurement is low, ability to communicate is low.
Summary of the invention
The present invention is directed to above-mentioned subject matter; develop network intelligence type protective relaying device based on ADSP BF518; can realize that high-acruracy survey, high reliability protection, quick acting, the communication of high speed Dual-Ethernet are characteristics, real high intelligence, the standardization protective relaying device of realizing integrating protection, measurement, control, telemechanical and multiple functions such as communicating by letter.Also strengthened simultaneously high-performance, the low cost of relay protection device, the advantage of low-power consumption, provided safeguard for meeting strong intelligent grid equipment requirements.
Technical scheme of the present invention is: the network intelligence type protective relaying device based on ADSP BF518 is the center with ADSP-BF518, by power module, detection of power loss, house dog and reseting module, ac signal acquisition module, open into leaving module, FPGA module, memory module, communication module, LCD MODULE and Keysheet module etc. and form.Power module adopts an AC/DC module, the voltage that this module two-way output is isolated, and one the tunnel is direct current 5V, the one tunnel is direct current 24V, the power supply of generator each several part.Detection of power loss, house dog and reseting module adopt a slice ADM706S, utilize the characteristics of this chip, have realized detection of power loss, external hardware watchdog and reset function, have improved the reliability of device.The ac signal acquisition module comprises that electric current and voltage changer, signal condition, ADC sampling unit and frequency pounce on parts such as obtaining the unit.In view of the constantly requirement to certainty of measurement and synchronized sampling of lifting of electric power system, the AD7606 that the ADC of device adopts the very suitable power line of the new release of two U.S. ADI companies to monitor, AD7606 is the synchronized sampling ADC of 16 precision of 8 passages, the sampling rate of each passage is up to 200ksps, and can further improve measuring accuracy by configuration 2-64 over-sampling function doubly.By the seamless link of two high speed SPORT of BF518 mouth, the SPORT mouth of BF518 is supported DMA between two ADC and the BF518, is fit to very much high-speed data acquisition.Opening into leaving function of device realized with opening into leaving module by the FPGA module, the FPGA module is connected with BF518 by address, DCB interface, the real-time pilot switch amount of FPGA module input channel and control switch amount output channel are as requested opened into leaving module and are mainly realized opening into functions such as the isolation of leaving signal and drivings.Device has the communication module of feature richness, comprise two 10/100M self adaptation Ethernets (supporting IEEE 1588), RS232, RS485 and CAN interface, these unit and BF518 annexation are as follows: the KSZ8893M Ethernet switching chip that Ethernet adopts Micrel company to produce is connected to the MII interface of BF518, generate two Ethernet interfaces, in fact RS232 and RS485 can be suitable for the UART interface that BF518 carries and generate, and the CAN interface is that the SPI interface by BF518 generates.Device support character type lattice lcd and TFT LCD, LCD MODULE comprises two kinds of connected modes: one connects by bus interface BF518, and its two PPI interface by BF518 connects and support TFT LCD.This device with the monitoring AC signal after overcurrent, voltage transformation and conditioning, give synchronized sampling by ADC, sampled result is input to DSP, DSP finishes various numerical operations, analysis and processing.Whether handle the back decision needs by opening into leaving the module drive relay; Simultaneously, monitoring result and protection action message are sent into management system or host computer, the collaborative course of work of finishing protection and monitoring by various communication modes (Industrial Ethernet (two), CAN, RS485 and RS232 etc.).
The device core adopts U.S. Analog Device Inc. company to produce ADSP BF518 chip.The BF518 processor all has the clock rate up to 400MHz (800MMACS), built-in 116kB RAM, and selectable 4Mbit serial (SPI) flash memory.Every money device is also all integrated is used for the Lockbox safe practice of code and content protecting.The Blackfin processor has outstanding low power capabilities, supports abundant media application, and chip integration becomes characteristic to guarantee that it can be connected with multiple audio frequency, video, image and communications peripheral and polytype memory like a cork.Integrated characteristic comprises: support 16 stereo I2S digital audio channels, 12 peripheral hardware DMA passages, built-in advanced storage controller also is provided, be used to realize the seamless link with many group outside SDRAM, SRAM, Flash or ROM.Each processor comprises two binary channels synchronous serial communication ports (SPORT), a high-speed parallel Peripheral Interface (PPI), compatible 2 line interface (TWI) of I2C, the UART of two PC compatibilities, the Serial Peripheral Interface (SPI) port of two SPI compatibilities and the RMII/MII interface of support IEEE 1588.This shows that BF518 not only has powerful Digital Signal Processing function, also have abundant external communication interface simultaneously, be very suitable for network intelligence type protective relaying device.
Apparatus of the present invention beneficial effect: device has adopted 16 64MB SDRAM (U402), 16 4MB NOR Flash (U403) system with the BF518 composition, and data-handling capacity is strong, is fit to the demand of novel protective relaying device.SDRAM adopts MC48LC32M16A2TG-75, SDRAM and BF518 seamless link.Device NOR Flash (U403) adopts M29W320EB, is 16 4MB NOR Flash.
Device adopts the rich data memory function, has the NAND Flash module (U508) that extends out, and can be used as mass data storage.The NANDFlash data/address bus is connected to the least-significant byte of the EMIU data/address bus of BF518, control signal generates by FPGA, extend out the NAND Flash of the common various capacity of NAND Flash support existing market, and the interface of reservation and 2CE type NAND Flash, can be used as the local storage of big capacity.Device adopts the K9F1208U0M of SAMSUNG company.In addition, device has adopted two FM18L08-70-S6 ferroelectric memorys (U501 and U502), and the capacity of FM18L08 is 256Kb (32kx8), is used for the storage of device setting value etc.
Device is supported 16 passage synchronized samplings, and sample rate is up to 200kbps.Data acquisition system has used two AD7606 (U101 and U201) as analog-to-digital conversion, and AD7606 is 16 8 passage synchronized sampling ADC, and has 2-64 times of over-sampling function.ADI DSP relaying protection development platform has 11 analog input signals; become analog voltage signal behind the analog input signal input TV/TA; through being connected to 11 input channels (supporting 16 altogether) of ADC after the conditioning, every ADC is connected with BF518 by a SPORT mouth.
Opening into leaving the unit of device has 20 and opens into signal and 20 and leave signal, but and flexible expansion.System has adopted the X3S100E of the XILINX of a slice high performance-price ratio, and X3S100E has abundant IO, has greatly enriched the needs of opening into the control unit of leaving interface and subsequent expansion, and some logics of this external system also realize in FPGA.
Device has abundant communication interface, i.e. two Ethernet interfaces (supporting IEEE 1588), a RS232 interface, a RS485 interface and a CAN bus interface.ADSP BF518 network intelligence type protective relaying device is supported IEEE 1588 precision net time protocols, the transition of transformer substation communication standard forward IEC 61850 standards at present, and IEEE 1588 is precision net time protocols of recommending.
Adopt isolation technology-magnetic coupling of the advanced person of U.S. ADI company to isolate between RS232 interface, RS485 interface and the CAN bus interface and the BF518 of device, greatly improved the reliability of device.
Device is supported character type lattice lcd and TFT LCD, and the character type lattice lcd connects by the BF518EBIU bus interface, and TFT LCD connects by the PPI interface of BF518.
Device is low power dissipation design, and main chip BF518 and AD7606 are the low-power consumption chip.
ADSP BF518 network intelligence type protective relaying device is applicable to the relaying protection and the monitoring of the power transmission and transformation line that is not higher than 110kV.
Description of drawings
Fig. 1: be line construction block diagram of the present invention
Among the figure: 1-ADSP BF518 module, 2-ac signal acquisition module, 3-opens into leaving module, 4-FPGA module, 5-memory module; The 6-DSP debugging interface, 7-communication module, 8-Keysheet module, 9-LCD MODULE, 10-detection of power loss, house dog and reseting module, 11-power module.
Embodiment
With reference to Fig. 1, ADSP BF518 network intelligence type protective relaying device is by ADSP BF518 module 1 (adopting U.S. Analog Device Inc. company to produce ADSP BF518 chip); ac signal acquisition module 2; open into leaving module 3; FPGA module (adopting the XC3S100E of U.S. XILINX); memory module 5; communication module 7; Keysheet module 8 (ADP5588 that sampling ADI company produces); LCD MODULE 9 (adopting the ZX240128A that shows Electronics Co., Ltd. in Beijing); detection of power loss; house dog and reseting module (ADM706S that sampling ADI company produces); power module 11 compositions such as (adopting D-50BGD type 2 road insulating power supplies of Guangzhou Meanwell Electronic Products Co., Ltd.).
Ac signal acquisition module 2 comprises AC signal converter unit (TR0102-2B, TR0102-2C type power pack and the TR1102-2C type voltage changer of sampling Hubei Tianrui Electronic Co., Ltd.), signal condition unit (sampling two-stage RC low-pass filtering, single-ended signal is by the difference connected mode), analog to digital converter (AD7606 of sampling U.S. ADI) and frequency acquisition element circuit (adopting the two-in-one amplifier AD8666 of U.S. ADI).The AC signal of monitoring gives synchronized sampling by ADC after overcurrent, voltage transformation and conditioning, the sampling interval, sampled result was input to DSP along with the frequency that the frequency acquisition unit obtains is adjusted in real time, and DSP finishes various numerical operations, analysis and processing.The type selecting of AC signal converter unit is the comparison key, need consider according to the signal input range of ADC, to obtain more accurate measurement result.The frequency acquisition element circuit has guaranteed the consistency in the time interval of synchronized sampling, is by obtaining signal from analog input signal, by filtering and become the discernible square wave in BF518 frequency acquisition unit, thereby obtains frequency information.The frequency acquisition element circuit is made up of amplifier AD8666 etc.
Open into leaving module 3 and comprise switching input module (adopt Toshiba Corp produce TLP521-4 cake core) and switching value output module (adopting the C931-1A-24DS of the TLP521-4 cake core of Toshiba Corp's production and Taiwan glad big relay Co., Ltd).4 pairs of real-time pilot switch amount input channels of FPGA module and control switch amount output channel are as requested opened into leaving module and are mainly realized opening into functions such as the isolation of leaving signal and drivings.In the switching value output module, for same switching value output control signal, by two control signals of FPGA output, the XOR control circuit by external has prevented the unusual fluctuation that device causes when powering on.
The data/address bus of NAND Flash interface is a DSP EMIU data/address bus, and control signal generates by FPGA.
Communication module 7 comprises ethernet module (the KSZ8893M Ethernet switching chip that adopts Micrel company to produce), RS232 module (ADM3202 that sampling ADI company produces), RS485 module (ADM3486E that sampling ADI company produces), CAN module (MCP2515 that sampling MICROCHIP company produces).For the interference free performance that improves device and to the protection of core processor unit; RS232 module, RS485 module and CAN module adopt isolation technology-magnetic coupling of the advanced person of U.S. ADI company to isolate; wherein use the ADuM5401 and the ADuM5402 of ADI company, greatly improved the reliability of device.
Detection of power loss, house dog and reseting module (10) adopt a slice ADM706S, have realized detection of power loss, external hardware watchdog and have resetted (contain electrification reset, hand-reset and automatically reset when unusual) function.The ADM706S electric power management circuit provides the solution of monolithic, and when monitored voltage drops to when being lower than the monitoring point, this module output interrupt signal is given processor, and when voltage is lower than a certain set point, the output system reset signal.Utilize the built-in watchdog function module of ADM706S, as the external watchdog module of device.
Adopt the built-in RTC module of RF518, need crystal oscillator and the battery of external 32.768kHz.When external power supply, the RTC module adopts external power source, otherwise uses powered battery.
BF518 debugging interface 6 is the JTAG debug port of DSP.The functions such as hardware and software debugging that are used for device.
Claims (10)
1. one kind based on ADSP BF518 network intelligence type protective relaying device; it is characterized in that this device is the center with ADSP BF518 (1); wherein, ADSP BF518 and ac signal acquisition module (2), open into leave module (3), FPGA module (4), memory module (5), communication module (7), Keysheet module (8), LCD MODULE (9), detection of power loss, house dog and reseting module (10), power module (11) is connected.
2. according to claim 1 based on ADSP BF518 network intelligence type protective relaying device; it is characterized in that being connected between the Primary Component AD7606 in ADSP BF518 (1) and the ac signal acquisition module (2), promptly ADSP BF518 is by the connected mode of SPORT interface and AD7606.
3. according to claim 1 based on ADSP BF518 network intelligence type protective relaying device, it is characterized in that the connected mode and the parameter designing of the signal conditioning circuit that the analog to digital converter AD7606 in the ac signal acquisition module (2) is connected.
4. according to claim 1 based on ADSP BF518 network intelligence type protective relaying device, it is characterized in that in the ac signal acquisition module (2) based on the frequency acquisition element circuit design of AD8666 and the connected mode of this circuit and ADSP BF518.
5. according to claim 1 based on ADSP BF518 network intelligence type protective relaying device; it is characterized in that the connected mode between the ethernet module in ADSP BF518 (1) and the communication module (7), promptly ADSP BF518 (1) and the ethernet module KSZ8893M's that is adopted is connected.
6. according to claim 1 based on ADSP BF518 network intelligence type protective relaying device, it is characterized in that isolation technology and the connected mode of RS232 module in the communication module (7), RS485 module, CAN module and ADSP BF518 (1).
7. according to claim 1 based on ADSP BF518 network intelligence type protective relaying device, being connected of the control signal that the EBIU bus that it is characterized in that NAND FLASH module and ADSP BF518 (1) in the memory module (5) and FPGA module (4) provide.
8. according to claim 1 based on ADSP BF518 network intelligence type protective relaying device, it is characterized in that being connected between the middle NOR FLASH module of ADSP BF518 (1) and memory module (5).
9. according to claim 1 based on ADSP BF518 network intelligence type protective relaying device; it is characterized in that being connected of ADSP BF518 (1) and detection of power loss, house dog and reseting module (10), promptly the ADM706S's that produces of ADSP BF518 (1) and ADI company is connected.
10. according to claim 1 based on ADSP BF518 network intelligence type protective relaying device, it is characterized in that opening connection into leaving XOR control circuit in the module (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020184609 CN201887538U (en) | 2010-05-11 | 2010-05-11 | Network intelligent type relay protector based on ADSP BF518 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020184609 CN201887538U (en) | 2010-05-11 | 2010-05-11 | Network intelligent type relay protector based on ADSP BF518 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201887538U true CN201887538U (en) | 2011-06-29 |
Family
ID=44185083
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201020184609 Expired - Fee Related CN201887538U (en) | 2010-05-11 | 2010-05-11 | Network intelligent type relay protector based on ADSP BF518 |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201887538U (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102244415A (en) * | 2010-05-11 | 2011-11-16 | 北京亿旗创新科技发展有限公司 | Intelligent relay protector of network |
| CN102969949A (en) * | 2012-10-31 | 2013-03-13 | 中国科学院长春光学精密机械与物理研究所 | Servo controller of high-precision permanent magnet synchronous motor |
| CN103592884A (en) * | 2013-11-15 | 2014-02-19 | 国家电网公司 | Management cabinet of relay protection reserve part |
| CN105425077A (en) * | 2015-12-10 | 2016-03-23 | 国网四川省电力公司电力科学研究院 | Portable digital relay protection tester |
| CN105573222A (en) * | 2016-03-21 | 2016-05-11 | 成都天进仪器有限公司 | Intelligent relay protection tester possessing expansion port |
| CN105629116A (en) * | 2016-03-28 | 2016-06-01 | 成都天进仪器有限公司 | Optical digital relay protection testing instrument for intelligent transformer substation debugging |
| CN105652132A (en) * | 2016-03-28 | 2016-06-08 | 成都天进仪器有限公司 | Self-adaptation intelligent power grid substation relay protection tester |
| CN105699820A (en) * | 2016-03-28 | 2016-06-22 | 成都天进仪器有限公司 | Intelligent optical digital relay protection tester |
| CN105699821A (en) * | 2016-03-28 | 2016-06-22 | 成都天进仪器有限公司 | Industrial control intelligent optical-digital relay protection tester |
| CN105759104A (en) * | 2016-04-22 | 2016-07-13 | 浙江科能达电气有限公司 | Intelligent controller and control method of multi-frequency sampling |
| CN104102161B (en) * | 2014-07-28 | 2016-08-31 | 安徽继远电网技术有限责任公司 | Intelligent integral power switch amount monitoring module |
| CN111722031A (en) * | 2020-05-13 | 2020-09-29 | 广州市扬新技术研究有限责任公司 | Direct current traction protection tester device based on FPGA |
-
2010
- 2010-05-11 CN CN 201020184609 patent/CN201887538U/en not_active Expired - Fee Related
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102244415A (en) * | 2010-05-11 | 2011-11-16 | 北京亿旗创新科技发展有限公司 | Intelligent relay protector of network |
| CN102969949A (en) * | 2012-10-31 | 2013-03-13 | 中国科学院长春光学精密机械与物理研究所 | Servo controller of high-precision permanent magnet synchronous motor |
| CN103592884A (en) * | 2013-11-15 | 2014-02-19 | 国家电网公司 | Management cabinet of relay protection reserve part |
| CN104102161B (en) * | 2014-07-28 | 2016-08-31 | 安徽继远电网技术有限责任公司 | Intelligent integral power switch amount monitoring module |
| CN105425077A (en) * | 2015-12-10 | 2016-03-23 | 国网四川省电力公司电力科学研究院 | Portable digital relay protection tester |
| CN105573222A (en) * | 2016-03-21 | 2016-05-11 | 成都天进仪器有限公司 | Intelligent relay protection tester possessing expansion port |
| CN105652132A (en) * | 2016-03-28 | 2016-06-08 | 成都天进仪器有限公司 | Self-adaptation intelligent power grid substation relay protection tester |
| CN105699820A (en) * | 2016-03-28 | 2016-06-22 | 成都天进仪器有限公司 | Intelligent optical digital relay protection tester |
| CN105699821A (en) * | 2016-03-28 | 2016-06-22 | 成都天进仪器有限公司 | Industrial control intelligent optical-digital relay protection tester |
| CN105629116A (en) * | 2016-03-28 | 2016-06-01 | 成都天进仪器有限公司 | Optical digital relay protection testing instrument for intelligent transformer substation debugging |
| CN105699821B (en) * | 2016-03-28 | 2018-07-17 | 成都天进仪器有限公司 | Industry control intelligence light digital relay protection tester |
| CN105652132B (en) * | 2016-03-28 | 2018-10-12 | 成都天进仪器有限公司 | A kind of self-adaptation type intelligent grid substation relay protection tester |
| CN105759104A (en) * | 2016-04-22 | 2016-07-13 | 浙江科能达电气有限公司 | Intelligent controller and control method of multi-frequency sampling |
| CN105759104B (en) * | 2016-04-22 | 2018-09-07 | 浙江科能达电气有限公司 | Intelligent controller and control method of multi-frequency sampling |
| CN111722031A (en) * | 2020-05-13 | 2020-09-29 | 广州市扬新技术研究有限责任公司 | Direct current traction protection tester device based on FPGA |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201887538U (en) | Network intelligent type relay protector based on ADSP BF518 | |
| CN102244415A (en) | Intelligent relay protector of network | |
| CN101498757B (en) | Real-time dynamic monitoring and recording equipment of power system | |
| CN101515015B (en) | Power quality monitoring and recording device of power system | |
| CN201639363U (en) | Comprehensive three-state data measuring and control device for intelligent transformer station | |
| CN201368904Y (en) | Real-time dynamic monitoring and recording device of power system | |
| CN205453290U (en) | Intelligent substation relay protection operating condition real time kinematic monitoring and recorder | |
| CN201368905Y (en) | Power quality monitoring and recording device of power system | |
| CN201796082U (en) | Intelligent device for measuring current, voltage and power | |
| CN104467164B (en) | Dual-power-supply input data acquisition terminal | |
| CN2798103Y (en) | Network intelligent electric energy quantity monitor | |
| CN205091797U (en) | Architectural energy consumption concentrates supervisory systems based on cloud computing technology | |
| CN103259334A (en) | Three-state integrated measuring and controlling device for transformer substation | |
| CN201113374Y (en) | Electrical power system microcomputer protecting measuring and controlling device based on double CPU structure | |
| CN207133618U (en) | A kind of box type transformer intelligent measuring and control device | |
| CN201576206U (en) | Dual-CPU measurement and control device for relay protection | |
| CN205506968U (en) | Three -phase power measure and control instrument | |
| CN204030723U (en) | Based on the distribution controller of CAN | |
| CN209709754U (en) | A kind of railway power telemechanical intelligent terminal of high-performance large capacity | |
| CN202586307U (en) | Digital type universal protection measurement and control device | |
| CN102664390A (en) | Digital general protection observing and controlling device | |
| CN201742164U (en) | Monitoring control device of low-voltage switch cabinet set | |
| CN112018719A (en) | 10KV line measurement and control protection device | |
| CN203840054U (en) | Object-oriented distribution terminal | |
| CN201846136U (en) | On-line electric power quality monitoring device facing intelligent power grid |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110629 Termination date: 20180511 |