CN109061540A - Electronic transformer angular difference standard device - Google Patents
Electronic transformer angular difference standard device Download PDFInfo
- Publication number
- CN109061540A CN109061540A CN201811212335.4A CN201811212335A CN109061540A CN 109061540 A CN109061540 A CN 109061540A CN 201811212335 A CN201811212335 A CN 201811212335A CN 109061540 A CN109061540 A CN 109061540A
- Authority
- CN
- China
- Prior art keywords
- module
- signal
- gate array
- array fpga
- programmable gate
- 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.)
- Pending
Links
- 230000003993 interaction Effects 0.000 claims abstract description 24
- 239000013307 optical fiber Substances 0.000 claims abstract description 10
- 108010076504 Protein Sorting Signals Proteins 0.000 claims description 6
- 230000001960 triggered effect Effects 0.000 claims description 6
- 230000003287 optical effect Effects 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000007688 edging Methods 0.000 claims description 3
- 235000013399 edible fruits Nutrition 0.000 claims description 3
- 230000000630 rising effect Effects 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 238000012545 processing Methods 0.000 abstract description 3
- 230000001360 synchronised effect Effects 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 description 3
- 239000000835 fiber Substances 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000004377 microelectronic Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/02—Testing or calibrating of apparatus covered by the other groups of this subclass of auxiliary devices, e.g. of instrument transformers according to prescribed transformation ratio, phase angle, or wattage rating
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/005—Calibrating; Standards or reference devices, e.g. voltage or resistance standards, "golden" references
- G01R35/007—Standards or reference devices, e.g. voltage or resistance standards, "golden references"
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The invention discloses an angle difference standard device of an electronic transformer. At present, no device can accurately and stably transmit the angle difference of the electronic transformer. The system comprises an optical fiber network port, an Ethernet PHY chip, a synchronization module, a DA module, a field programmable gate array FPGA, a microcontroller MCU and a man-machine interaction module; the field programmable gate array FPGA is used for communicating with the human-computer interaction module, receiving an instruction sent by the human-computer interaction module, controlling the synchronization module to output a synchronization signal according to the instruction, controlling the PHY chip to output a digital message based on an IEC61850 protocol, configuring the microcontroller MCU to generate waveform data, receiving the waveform data generated by the microcontroller MCU and outputting the waveform data to the DA module for generating a corresponding analog waveform. The invention determines the delay time existing in the analog circuit part by adopting the high-frequency clock to record the time difference between the square wave signal and the synchronous signal, and converts the delay time into the angular difference through data processing, thereby realizing the accurate and stable transmission of the angular difference.
Description
Technical field
The invention belongs to intelligent substation the digitized measurement device field, especially a kind of electronic mutual inductor angular difference standard
Device.
Background technique
Conditional electronic formula electric energy metered system is made of electromagnetic transformer and electronic electric energy meter, and secondary device largely makes
With cable transmission signal, error component is numerous.Different from traditional simulation electric energy metered system, digitalized electric energy metering system
The change of essence has occurred in overall architecture, and whole system is by electronic current mutual inductor (ECT), electronic type voltage transformer
(EVT), combining unit and digitalized electrical energy meter are constituted, and electronic mutual inductor (containing combining unit) is instead of conventional electromagnetic mutual inductance
Device, fiber optic communication are also replaced by digitalized electrical energy meter instead of a large amount of wire and cable, electronic electric energy meter.Digitalized electric energy meter
Measurer have insulation system it is simple, without explosion, without second open circuit, dangerous, digital signal is shared more easy, carrying load ability is by force etc.
Advantage.
An important link of the intelligent substation as smart grid has obtained promoting construction throughout the country, have certainly
It is dynamic to complete the functions such as information collection, measurement, control, protection, metering and monitoring.The digitized measurement system is as intelligent substation
Important component, to measure certain point electric energy as target, is electronic mutual inductor or biography according to mutual inductor to be digitized as feature
System electromagnetic transformer, is divided into totally digitilized metering device and Semi-digital metering device.Based on electronic mutual inductor, merge list
First, digitalized electrical energy meter technology digitalized electric energy metering system is widely applied in intelligent substation.
Currently, a kind of device can carry out the transmitting of accurate stable to electronic mutual inductor angular difference not yet.
Summary of the invention
For the precision problem of transmission that electronic mutual inductor angular difference in digitalized electric energy metering system detects, the present invention is provided
A kind of electronic mutual inductor angular difference standard set-up, by using the time difference of high frequency clock record square-wave signal and synchronization signal
It determines delay time existing for artificial circuit part, angular difference is converted for the delay time by data processing, to realize
The transmitting of angular difference accurate stable.
For this purpose, the present invention adopts the following technical scheme that: a kind of electronic mutual inductor angular difference standard set-up comprising optical fiber
Network interface, ethernet PHY chip, synchronization module, D/A module, field programmable gate array FPGA, microcontroller and man-machine
Interactive module；
The optical fiber network interface is used to receive the datagram message signal based on IEC61850 agreement of PHY chip output, and will
Electric signal is converted into optical signal output electron formula mutual-inductor tester；
The ethernet PHY chip is used to receive the data of on-site programmable gate array FPGA, and output is assisted based on EIC61850
The datagram message signal of view gives optical fiber network interface；
To be converted into light same for receiving the electric synchronization signal that field programmable gate array FPGA is sent for the synchronization module
Step signal is output to electronic transducer calibration instrument, or directly exports electric synchronization signal to oscillograph；
The D/A module is used to receive the control signal and digital signal of field programmable gate array FPGA, is believed according to control
Number corresponding digital signal is converted into analog signal output electron formula mutual-inductor tester or oscillograph；
The field programmable gate array FPGA receives what human-computer interaction module was sent for communicating with human-computer interaction module
Instruction exports the datagram based on IEC61850 agreement according to instruction control synchronization module output synchronization signal, control PHY chip
Text, configuration microcontroller generate Wave data, receive the Wave data that microcontroller generates and export to D/A module, are used for
Generate corresponding analog waveform；
The microcontroller is used to receive the configuration information of field programmable gate array FPGA, and is given birth to according to instruction
Field programmable gate array FPGA is issued at Wave data.
Supplement as above-mentioned technical proposal, the inside field programmable gate array FPGA generate serial ports control
Device, FSMC bus control unit, synchronization module controller, MII interface controller, DA controller, edge triggered flip flop and high-frequency count
Device；
The serial ports controller receives the instruction and upload knot that human-computer interaction module is sent for communicating with human-computer interaction module
Fruit data；FSMC bus control unit with microcontroller for communicating, and field programmable gate array FPGA is by configuration information
Microcontroller is passed to by FSMC bus, microcontroller calculates the digital signal sequences of waveform according to configuration information,
The digital signal sequences are passed on field programmable gate array FPGA by FSMC bus；Synchronization module controller is used for
Synchronization signal, which is provided, to high-frequency counter controls the different types of synchronization signal of synchronization module output simultaneously；MII interface controller
For communicating with PHY chip, the digital message based on IEC61850 agreement is exported；DA controller is used to Wave data being sent to DA
Module, control D/A module carry out digital-to-analogue conversion, export corresponding analog waveform；Edge triggered flip flop is used to receive D/A module output
Square-wave signal generates trigger signal to high-frequency counter when detecting square wave rising edge；High-frequency counter is believed for recording synchronism
Time difference number with edging trigger signal, result data is sent to human-computer interaction module by serial ports controller.
Supplement as above-mentioned technical proposal, the human-computer interaction module are equipped with Windows embedded OS
Portable device, have human-computer interaction, under issue a command to field programmable gate array FPGA and display result information function
Energy.
The device have the advantages that as follows: the present invention records square-wave signal and synchronization signal by using high frequency clock
Time difference determine delay time existing for artificial circuit part, angular difference converted for the delay time by data processing,
To realize the angular difference transmitting of accurate stable.
Detailed description of the invention
Fig. 1 is the principle of the present invention block diagram.
Specific embodiment
The invention will be further described with specific embodiment with reference to the accompanying drawings of the specification.
As shown in Figure 1, a kind of electronic mutual inductor angular difference standard set-up, including it is optical fiber network interface, ethernet PHY chip, same
Walk module, D/A module, field programmable gate array FPGA and microcontroller, human-computer interaction module.
Optical fiber network interface: using the AFBR-5803 optical fiber interface of AVAGO company, for receiving the base of PHY chip module output
In the datagram message signal of IEC61850 agreement, and convert the electrical signal to optical signal output electron formula mutual-inductor tester
Equal calibration equipments.
Ethernet PHY chip: existing by MII interface using the DP83640 Industrial Ethernet PHY chip of TI company
The digital message data of field programmable gate array FPGA exports the datagram message signal based on EIC61850 agreement to optical network
Mouthful.
Synchronization module: using the HFBR-1414 series fibre transmitter of AVAGO company；It is patrolled for receiving field-programmable
The electric synchronization signal that gate array FPGA is sent is collected, optical synchronous signal is translated into and is output to electronic transducer calibration instrument, or
Person directly exports electric synchronization signal to oscillograph.
D/A module: D/A converting circuit is formed using the AD5546 and high speed amplifier of AD company, can be compiled for receiving scene
Corresponding digital signal is converted into simulation letter according to control signal by the control signal and digital signal of journey logic gate array FPGA
Number it is output to the equipment such as electronic transducer calibration instrument or oscillograph.
Field programmable gate array FPGA: using the high-performance FPGA of Intel Company, serial ports is generated inside FPGA
Controller, FSMC bus control unit, synchronization module controller, MII interface controller, DA controller, edge triggered flip flop and high frequency
Counter.Wherein, serial ports controller receives human-computer interaction module and gives the instruction come and knot for communicating with human-computer interaction module
Fruit data upload；For FSMC bus control unit for communicating with microcontroller, FPGA passes to configuration information by FSMC bus
Microcontroller, microcontroller calculate the digital signal sequences of waveform according to configuration information, by the digital signal sequences
It is passed on field programmable gate array FPGA by FSMC bus；Synchronization module controller is used to provide to high-frequency counter
Synchronization signal, while controlling synchronization module and exporting different types of synchronization signal；MII interface controller is used for logical with PHY chip
News export the digital message based on IEC61850 agreement；DA controller is used to for Wave data to be sent to D/A module, controls D/A module
Digital-to-analogue conversion is carried out, corresponding analog waveform is exported；Edge triggered flip flop is used to receive the square-wave signal of D/A module output, detects
Trigger signal is generated when square wave rising edge to high-frequency counter；High-frequency counter is for recording synchronism signal and edging trigger signal
Time difference, result is sent to human-computer interaction module by serial ports controller.
Microcontroller:, can for receiving scene using the STM32F407 Series of MCU of ST Microelectronics
The configuration information of programmed logic gate array FPGA, and Wave data is generated according to instruction and is issued to field programmable gate array
FPGA。
Human-computer interaction module: the portable device equipped with Windows embedded OS has human-computer interaction function.
Human-computer interaction module is connect by serial ports with field programmable gate array FPGA, for sending instruction and data after receiving.
Obviously, the above embodiment is merely an example for clearly illustrating the present invention, and is not to of the invention
The restriction of embodiment.For those of ordinary skill in the art, it can also be made on the basis of the above description
Its various forms of variation or variation.There is no necessity and possibility to exhaust all the enbodiments.And these belong to this hair
The obvious changes or variations that bright spirit is extended out are still in protection scope of the present invention.
Claims (3)
1. a kind of electronic mutual inductor angular difference standard set-up, which is characterized in that including optical fiber network interface, ethernet PHY chip, synchronization
Module, D/A module, field programmable gate array FPGA, microcontroller and human-computer interaction module；
The optical fiber network interface is used to receive the datagram message signal based on IEC61850 agreement of PHY chip output, and will
Electric signal is converted into optical signal output electron formula mutual-inductor tester；
The ethernet PHY chip is used to receive the data of on-site programmable gate array FPGA, and output is assisted based on EIC61850
The datagram message signal of view gives optical fiber network interface；
To be converted into light same for receiving the electric synchronization signal that field programmable gate array FPGA is sent for the synchronization module
Step signal is output to electronic transducer calibration instrument, or directly exports electric synchronization signal to oscillograph；
The D/A module is used to receive the control signal and digital signal of field programmable gate array FPGA, is believed according to control
Number corresponding digital signal is converted into analog signal output electron formula mutual-inductor tester or oscillograph；
The field programmable gate array FPGA receives what human-computer interaction module was sent for communicating with human-computer interaction module
Instruction exports the datagram based on IEC61850 agreement according to instruction control synchronization module output synchronization signal, control PHY chip
Text, configuration microcontroller generate Wave data, receive the Wave data that microcontroller generates and export to D/A module, are used for
Generate corresponding analog waveform；
The microcontroller is used to receive the configuration information of field programmable gate array FPGA, and is given birth to according to instruction
Field programmable gate array FPGA is issued at Wave data.
2. electronic mutual inductor angular difference standard set-up according to claim 1, which is characterized in that the field-programmable
Generated inside logic gate array FPGA serial ports controller, FSMC bus control unit, synchronization module controller, MII interface controller,
DA controller, edge triggered flip flop and high-frequency counter；
The serial ports controller receives the instruction and upload knot that human-computer interaction module is sent for communicating with human-computer interaction module
Fruit data；FSMC bus control unit with microcontroller for communicating, and field programmable gate array FPGA is by configuration information
Microcontroller is passed to by FSMC bus, microcontroller calculates the digital signal sequences of waveform according to configuration information,
The digital signal sequences are passed on field programmable gate array FPGA by FSMC bus；Synchronization module controller is used for
Synchronization signal, which is provided, to high-frequency counter controls the different types of synchronization signal of synchronization module output simultaneously；MII interface controller
For communicating with PHY chip, the digital message based on IEC61850 agreement is exported；DA controller is used to Wave data being sent to DA
Module, control D/A module carry out digital-to-analogue conversion, export corresponding analog waveform；Edge triggered flip flop is used to receive D/A module output
Square-wave signal generates trigger signal to high-frequency counter when detecting square wave rising edge；High-frequency counter is believed for recording synchronism
Time difference number with edging trigger signal, result data is sent to human-computer interaction module by serial ports controller.
3. electronic mutual inductor angular difference standard set-up according to claim 1 or 2, which is characterized in that the man-machine friendship
Mutual module is the portable device equipped with Windows embedded OS, have human-computer interaction, under issue a command to scene and can compile
Journey logic gate array FPGA and display result information function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811212335.4A CN109061540A (en) | 2018-10-18 | 2018-10-18 | Electronic transformer angular difference standard device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811212335.4A CN109061540A (en) | 2018-10-18 | 2018-10-18 | Electronic transformer angular difference standard device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109061540A true CN109061540A (en) | 2018-12-21 |
Family
ID=64764981
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811212335.4A Pending CN109061540A (en) | 2018-10-18 | 2018-10-18 | Electronic transformer angular difference standard device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109061540A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113964937A (en) * | 2021-09-22 | 2022-01-21 | 中国船舶工业系统工程研究院 | Compact independent power supply remote control trigger |
Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090125263A1 (en) * | 2007-07-20 | 2009-05-14 | The Regents Of The University Of Michigan | High Resolution Time Measurement in a FPGA |
| CN101556318A (en) * | 2009-04-20 | 2009-10-14 | 江苏省电力试验研究院有限公司 | Self-adapting combiner delay time and synchronous electronic mutual inductor steady state checking device |
| CN101770006A (en) * | 2010-03-15 | 2010-07-07 | 刘陈 | Novel method for checking electronic transducer |
| CN201859212U (en) * | 2010-08-09 | 2011-06-08 | 刘陈 | Novel calibration device of electronic type mutual inductor |
| JP2011191893A (en) * | 2010-03-12 | 2011-09-29 | Hitachi Information & Communication Engineering Ltd | Logic verification device for divisionally mounted logic circuit |
| CN103064051A (en) * | 2011-10-18 | 2013-04-24 | 熊江咏 | Multifunctional electronic transformer calibrator |
| CN202995020U (en) * | 2012-11-06 | 2013-06-12 | 中国电力科学研究院 | Electronic transformer calibrator calibrating device based on digital source |
| CN103543430A (en) * | 2013-09-27 | 2014-01-29 | 广东电网公司电力科学研究院 | Standard modulus synchronous signal source |
| WO2014071753A1 (en) * | 2012-11-06 | 2014-05-15 | 国家电网公司 | Electronic transformer calibrator calibration device and method based on digital source |
| CN103941214A (en) * | 2014-04-21 | 2014-07-23 | 国家电网公司 | Electronic transformer verification system and method on basis of TDC |
| WO2014111920A1 (en) * | 2013-01-17 | 2014-07-24 | Sure Erasure Ltd. | System and method for monitoring of an electro-mechanical device |
| KR20150025202A (en) * | 2013-08-28 | 2015-03-10 | 이관희 | Non-polar earth leakage breaker |
| CN206710582U (en) * | 2017-04-24 | 2017-12-05 | 北京博电新力电气股份有限公司 | A kind of electronic transformer calibrator |
| CN108318846A (en) * | 2018-01-18 | 2018-07-24 | 国网浙江省电力有限公司电力科学研究院 | The test device that Intelligent substation merging unit is absolutely delayed |
| CN108490251A (en) * | 2018-03-13 | 2018-09-04 | 国网天津市电力公司电力科学研究院 | A kind of digital electric energy metering device meeting 3/2 wiring |
| US20180254994A1 (en) * | 2017-03-03 | 2018-09-06 | Schweitzer Engineering Laboratories, Inc. | Systems and methods for time-synchronized communication |
| CN207882426U (en) * | 2018-01-03 | 2018-09-18 | 中国电力科学研究院有限公司 | A kind of system for being calibrated to the absolute delay time |
| CN209182487U (en) * | 2018-10-18 | 2019-07-30 | 国网浙江省电力有限公司电力科学研究院 | A kind of electronic mutual inductor angular difference standard set-up |
-
2018
- 2018-10-18 CN CN201811212335.4A patent/CN109061540A/en active Pending
Patent Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090125263A1 (en) * | 2007-07-20 | 2009-05-14 | The Regents Of The University Of Michigan | High Resolution Time Measurement in a FPGA |
| CN101556318A (en) * | 2009-04-20 | 2009-10-14 | 江苏省电力试验研究院有限公司 | Self-adapting combiner delay time and synchronous electronic mutual inductor steady state checking device |
| JP2011191893A (en) * | 2010-03-12 | 2011-09-29 | Hitachi Information & Communication Engineering Ltd | Logic verification device for divisionally mounted logic circuit |
| CN101770006A (en) * | 2010-03-15 | 2010-07-07 | 刘陈 | Novel method for checking electronic transducer |
| CN201859212U (en) * | 2010-08-09 | 2011-06-08 | 刘陈 | Novel calibration device of electronic type mutual inductor |
| CN103064051A (en) * | 2011-10-18 | 2013-04-24 | 熊江咏 | Multifunctional electronic transformer calibrator |
| WO2014071753A1 (en) * | 2012-11-06 | 2014-05-15 | 国家电网公司 | Electronic transformer calibrator calibration device and method based on digital source |
| CN202995020U (en) * | 2012-11-06 | 2013-06-12 | 中国电力科学研究院 | Electronic transformer calibrator calibrating device based on digital source |
| WO2014111920A1 (en) * | 2013-01-17 | 2014-07-24 | Sure Erasure Ltd. | System and method for monitoring of an electro-mechanical device |
| KR20150025202A (en) * | 2013-08-28 | 2015-03-10 | 이관희 | Non-polar earth leakage breaker |
| CN103543430A (en) * | 2013-09-27 | 2014-01-29 | 广东电网公司电力科学研究院 | Standard modulus synchronous signal source |
| CN103941214A (en) * | 2014-04-21 | 2014-07-23 | 国家电网公司 | Electronic transformer verification system and method on basis of TDC |
| US20180254994A1 (en) * | 2017-03-03 | 2018-09-06 | Schweitzer Engineering Laboratories, Inc. | Systems and methods for time-synchronized communication |
| CN206710582U (en) * | 2017-04-24 | 2017-12-05 | 北京博电新力电气股份有限公司 | A kind of electronic transformer calibrator |
| CN207882426U (en) * | 2018-01-03 | 2018-09-18 | 中国电力科学研究院有限公司 | A kind of system for being calibrated to the absolute delay time |
| CN108318846A (en) * | 2018-01-18 | 2018-07-24 | 国网浙江省电力有限公司电力科学研究院 | The test device that Intelligent substation merging unit is absolutely delayed |
| CN108490251A (en) * | 2018-03-13 | 2018-09-04 | 国网天津市电力公司电力科学研究院 | A kind of digital electric energy metering device meeting 3/2 wiring |
| CN209182487U (en) * | 2018-10-18 | 2019-07-30 | 国网浙江省电力有限公司电力科学研究院 | A kind of electronic mutual inductor angular difference standard set-up |
Non-Patent Citations (2)
| Title |
|---|
| 何梦林等: "一种基于样条插值的高精度互感器角差补偿方法", 《自动化与仪器仪表》, no. 6 * |
| 胡浩亮;李前;卢树峰;杨世海;李鹤;李登云;: "电子式互感器误差的两种校验方法对比", 高电压技术, no. 12 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113964937A (en) * | 2021-09-22 | 2022-01-21 | 中国船舶工业系统工程研究院 | Compact independent power supply remote control trigger |
| CN113964937B (en) * | 2021-09-22 | 2023-12-05 | 中国船舶工业系统工程研究院 | Compact independent power supply remote control trigger |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201828659U (en) | Inspection device of digitalized electric energy meter | |
| CN204408017U (en) | A kind of area user identification zone device | |
| CN103529423B (en) | New digital Watt-hour meter's field test device and method of calibration | |
| CN103901390B (en) | The resource integrated pick-up unit of table detected for digitalized electrical energy meter and detection method | |
| CN107677982A (en) | A kind of digitalized electrical energy meter on-site calibrating method and device | |
| CN202631981U (en) | Device for whole power network accurate synchronous time service and timing used in coal mine | |
| CN105548948A (en) | Device and method for testing digitalization electric energy metering system | |
| CN102468897B (en) | Digital signal synchronization method | |
| CN108490251B (en) | Satisfy digital electric energy metering device of 3/2 wiring | |
| CN103048638A (en) | Multi-function power digital signal inspection device | |
| CN207281270U (en) | A kind of electronic transducer calibration instrument detecting system | |
| CN101893695B (en) | Analog sampling and protocol generating devices | |
| CN104007410A (en) | Digital electric energy meter verifying device | |
| CN203561689U (en) | Data acquisition system of electronic type current transformer | |
| CN209182487U (en) | A kind of electronic mutual inductor angular difference standard set-up | |
| CN104569899A (en) | High-accuracy high-voltage direct-current transformer calibrator | |
| CN205139355U (en) | Leading collection system suitable for system is compared to total mark electric quantity | |
| CN105548947B (en) | A kind of synchronous source tracing method of digitalized electrical energy meter and system | |
| CN109061540A (en) | Electronic transformer angular difference standard device | |
| CN201765317U (en) | Portable photoelectric mutual inductor check system with multiple synchronous interfaces | |
| CN104597424A (en) | Verification platform and verification method for electric energy measurement of optical transformer | |
| CN202600133U (en) | Digital quantity input electric energy meter calibration system capable of supporting synchronous analog quantity source tracing | |
| CN103837854B (en) | A kind of calibration equipment of digital electricity meter based on FT3 interface | |
| CN103499807B (en) | A kind of method of calibration eliminating digital electricity meter truncated error | |
| CN205121234U (en) | Real -time synchronization data acquisition device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20220507 Address after: 311100 Building 5, 138 Yunlian Road, Yuhang District, Hangzhou City, Zhejiang Province Applicant after: Marketing service center of State Grid Zhejiang Electric Power Co.,Ltd. Applicant after: STATE GRID CORPORATION OF CHINA Applicant after: HANGZHOU E ENERGY ELECTRIC POWER TECHNOLOGY Co.,Ltd. Applicant after: CHINA ELECTRIC POWER RESEARCH INSTITUTE Co.,Ltd. Applicant after: NINGBO SUNRISE INSTRUMENTS Co.,Ltd. Address before: The eight district of Hangzhou city in Zhejiang province 310014 Huadian Zhaohui under No. 1 Lane Applicant before: STATE GRID ZHEJIANG ELECTRIC POWER COMPANY LIMITED ELECTRIC POWER Research Institute Applicant before: STATE GRID CORPORATION OF CHINA Applicant before: HANGZHOU E ENERGY ELECTRIC POWER TECHNOLOGY Co.,Ltd. Applicant before: CHINA ELECTRIC POWER RESEARCH INSTITUTE Co.,Ltd. Applicant before: NINGBO SUNRISE INSTRUMENTS Co.,Ltd. |