CN103762721A - Method for guaranteeing digital output consistency of electronic transformer - Google Patents
Method for guaranteeing digital output consistency of electronic transformer Download PDFInfo
- Publication number
- CN103762721A CN103762721A CN201410004670.0A CN201410004670A CN103762721A CN 103762721 A CN103762721 A CN 103762721A CN 201410004670 A CN201410004670 A CN 201410004670A CN 103762721 A CN103762721 A CN 103762721A
- Authority
- CN
- China
- Prior art keywords
- transducer
- merge cells
- penalty coefficient
- output
- digital output
- 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.)
- Granted
Links
Images
Abstract
The invention relates to a method for guaranteeing the digital output consistency of an electronic transformer. The electronic transformer comprises a sensor, a converter, a transmission optical fiber, a merging unit and the like. The digital output consistency comprises the consistency of amplitude precision, phase precision, constant time lag and the like. All diameters are stored in the converter and the merging unit, parameter identification and synchronization are achieved through communication of the converter and the merging unit, the digital quality is corrected according to the parameters in the merging unit, and the purpose that the entire performance of the electronic transformer is consistent is achieved. The method is high in pre-installation performance, manually writing parameters after the electronic transformer leaves a factory is of no need, operation is simple, maintaining or replacing is very easy, the parameters are stored in two places, and the reliability is high.
Description
Technical field
The invention belongs to power domain, especially a kind of method that guarantees Electrical Instrument Transducers with Digital output-consistence.
Technical background
At present, along with the development of intelligent grid, intelligent substation is more and more, and electronic mutual inductor is important component part wherein.Electronic mutual inductor is mainly comprised of transducer and transducer and merge cells.Due to reasons such as production technology limitations, the output characteristic of transducer is difficult to ensure that card is in full accord, and due to reasons such as the simulated modulation circuit deviations of transducer and AD transfer delaies, signal there will be certain ratio and phase difference after being converted to digital signal.In order to guarantee that electronic mutual inductor overall precision can arrive requirement, need to compensate demarcation to deviation in merge cells.And after demarcating, need to keep transducer, transducer to keep corresponding one by one with the data channel of merge cells and even merge cells, otherwise obscure occurring, precise decreasing caused.This will cause the project installation of electronic mutual inductor after dispatching from the factory and safeguard and change complicated operation and easily occur mistake.
Summary of the invention
For the problem that overcomes the project installation of electronic mutual inductor after dispatching from the factory and safeguard complicated operation in Renewal process and easily make mistakes, the invention provides a kind of method that guarantees Electrical Instrument Transducers with Digital output-consistence, scene only needs to be combined cell command operation, without manual configuration parameter and field adjustable or verification, can complete and install or change, and guarantee that Electrical Instrument Transducers with Digital output is consistent.
For realizing above goal of the invention, the present invention proposes following technical scheme: a kind of method that guarantees Electrical Instrument Transducers with Digital output-consistence, and its difference is: its method comprises the following steps:
Step 1), independent testing sensor, record the deviation of its actual output and specified output, is designated as Ks;
Step 2), independent test translator, record the skew of its output, be designated as Kc;
Step 3), transducer receive the data that send by crossing merge cells from host computer, i.e. two groups of deviation compensation COEFFICIENT K s that test obtains and Kc, and be kept in non-volatile memory chip;
After step 4), transducer and transducer combination, transducer sends real-time sampling digital signal to merge cells by optical fiber, sends in the lump production code member ID and penalty coefficient to merge cells in the Frame of same link layer simultaneously;
When step 5), merge cells First Contact Connections, pass through to receive the upload command of host computer, production code member and penalty coefficient that receiving converter sends, and be kept in specific non-volatile memory chip;
Step 6), merge cells read production code member and the penalty coefficient in self non-volatile memory chip, receive the digital signal from transducer simultaneously, confirm whether consistent with storage chip own of the production code member that receives and penalty coefficient; If consistent, according to penalty coefficient, signal is compensated, reach the consistency of numeral output; If inconsistent, outputting alarm signal;
If step 7) need to be changed transducer, connect after optical fiber, merge cells, by receiving the download command of host computer, re-writes transducer by the penalty coefficient Ks of transducer, then by the upload command that receives host computer, the numbering ID of transducer and penalty coefficient Kc is saved in merge cells; If need to change merge cells, repeating step 5 after connection optical fiber) and 6).
By above scheme, the merge cells in described step is replaced by transponder, by transponder, exports consistent digital signal, access merge cells or need the secondary device of signal.
By above scheme, the transducer in described step 3) receives penalty coefficient the preservation from merge cells or transponder by optical communication module.
By above scheme, the merge cells in described step 4) and step 5) or transponder receive to be uploaded or download instruction carry out reception or the transmission of relevant parameter by optical communication module.
By above scheme, the transducer in described step 7) and the coefficient of transducer are independently, transmit respectively between merge cells and transducer.
The invention has the advantages that: the present invention realizes based on following apparatus: primary transducer, the transducer that contains the non-volatile memory chips such as EEPROM, Flash, contain the non-volatile memory chips such as EEPROM, Flash merge cells, transducer and merge cells between a pair of transmitting-receiving optical fiber; In the method, the error compensation coefficient of transducer and transducer is all saved in the non-volatile memory chip of transducer; While using for the first time, product information and penalty coefficient are passed to merge cells in the lump; Merge cells storage information.In use procedure, no matter need to change transducer or merge cells, can obtain primal system penalty coefficient, according to these group data and error amount that more exchange device is new, calculate existing system error compensation coefficient.By this method, can guarantee the consistency of Electrical Instrument Transducers with Digital output, effectively avoid the systematic error causing because of equipment replacement in engineering use procedure.Electronic mutual inductor completed farthest default before dispatching from the factory, while operating at the scene, only need to be combined unit and assign the corresponding command, without manual configuration parameter and field adjustable or verification, can complete and install or change, and guarantee that Electrical Instrument Transducers with Digital output is consistent.The method is simple to operation, greatly reduces the workload of engineering site.
Accompanying drawing explanation
Fig. 1 is embodiment of the present invention electronic mutual inductor theory of constitution figure;
Fig. 2 is the flow chart that the embodiment of the present invention guarantees the method for Electrical Instrument Transducers with Digital output-consistence;
Fig. 3 is the schematic diagram of embodiment of the present invention sensor bias detection method;
Fig. 4 is the schematic diagram of embodiment of the present invention transponder deviation detecting method;
Fig. 5 is the flow chart of software in embodiment of the present invention transducer;
Fig. 6 is the flow chart of software in embodiment of the present invention merge cells.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is further illustrated.
The lower specific embodiment of the invention is described first on the whole: a kind of method that guarantees Electrical Instrument Transducers with Digital output-consistence, its method comprises the following steps:
Step 1), independent testing sensor, record the deviation of its actual output and specified output, is designated as Ks;
Step 2), independent test translator, record the skew of its output, be designated as Kc;
Step 3), transducer receive the data that send by crossing merge cells from host computer, i.e. two groups of deviation compensation COEFFICIENT K s that test obtains and Kc, and be kept in non-volatile memory chip;
After step 4), transducer and transducer combination, transducer sends real-time sampling digital signal to merge cells by optical fiber, sends in the lump production code member ID and penalty coefficient to merge cells in the Frame of same link layer simultaneously;
When step 5), merge cells First Contact Connections, pass through to receive the upload command of host computer, production code member and penalty coefficient that receiving converter sends, and be kept in specific non-volatile memory chip;
Step 6), merge cells read production code member and the penalty coefficient in self non-volatile memory chip, receive the digital signal from transducer simultaneously, confirm whether consistent with storage chip own of the production code member that receives and penalty coefficient; If consistent, according to penalty coefficient, signal is compensated, reach the consistency of numeral output; If inconsistent, outputting alarm signal;
If step 7) need to be changed transducer, connect after optical fiber, merge cells, by receiving the download command of host computer, re-writes transducer by the penalty coefficient Ks of transducer, then by the upload command that receives host computer, the numbering ID of transducer and penalty coefficient Kc is saved in merge cells; If need to change merge cells, repeating step 5 after connection optical fiber) and 6).
Further, the merge cells in described step can be replaced by transponder, by transponder, exports consistent digital signal, access merge cells or need the secondary device of signal.
Further, the transducer in described step 3) can receive penalty coefficient the preservation from merge cells or transponder by optical communication module.
Further, the merge cells in described step 4) and step 5) or transponder receive and upload or download instruction carry out reception or the transmission of relevant parameter by optical communication module.
Further, the transducer in described step 7) and the coefficient of transducer can be independently, transmit respectively between merge cells and transducer.
As shown in Figure 1, the method of assurance Electrical Instrument Transducers with Digital output-consistence of the present invention, it is realized based on following apparatus: current sensor or voltage sensor, the transducer that contains the non-volatile memory chips such as EEPROM, Flash, contain the non-volatile memory chips such as EEPROM, Flash merge cells, transducer and merge cells between a pair of transmitting-receiving optical fiber.
Below in conjunction with Fig. 2, be further described, its concrete steps are as follows:
Step 1), independent testing sensor, as shown in Figure 3, installation of sensors is once being gone up, the analog quantity access mutual-inductor tester of its output, standard mutual inductor also with is once connected, the standard analog amount of output also accesses mutual-inductor tester, applies rated voltage or rated current in Primary Conductor simultaneously, by the deviation of tester detecting sensor, comprise amplitude deviation and phase difference.
Step 2), test translator separately, as shown in Figure 4, the transducer of label taking standard, by its standard output access transducer, get the merge cells of known self constant time lag, by the digital signal access merge cells of transducer, by the numeral output access electronic transducer calibration instrument of merge cells, equally the output of standard mutual inductor is also accessed to electronic transducer calibration instrument, in Primary Conductor, apply rated voltage or rated current, by the deviation of tester combining data detection element output signal, comprise amplitude deviation and phase difference, wherein phase deviation need deduct the phase difference that merge cells constant time lag causes, remaining phase difference comprises the phase deviation that the signal conditioning circuit of transducer causes, the phase difference that the constant time lag that AD conversion and digital processing cause causes.
Step 3), according to above-mentioned 2 pacings, try two groups of deviations that obtain, can calculate penalty coefficient separately, be designated as respectively sensor compensation COEFFICIENT K s and converter compensates COEFFICIENT K c, merge cells is communicated by letter with host computer by debug port, after receiving download command, by all penalty coefficient composition table 2 frame formats and through optical communication module, penalty coefficient is downloaded in transducer, transducer receives coefficient and is kept at (flow process of inner execution graph 5) in non-volatile memory chip, because calibration coefficient is for there being symbol floating number, and storage chip is only stored the binary data of 16, therefore unified for realizing, merge cells need necessarily be processed calibration coefficient, because the effective decimal place of coefficient is 4, therefore get its integer part by after 10000 times of coefficient magnifies, because there being the scope of symbol 16 bit data, be-32768 to 32767, therefore its calibration coefficient circumscription is-3.2768 to 3.2767.
Step 4), by after the combination of transducer and transducer, transducer sends digital signal to merge cells by the frame format of table 1 by optical communication module, the production code member of transducer and transducer and penalty coefficient is put into same Frame simultaneously and sends in the lump merge cells to.
When step 5), merge cells First Contact Connections transducer, receive the upload command that host computer sends, merge cells is production code member and the penalty coefficient of receiving sensor and transducer, and is kept in non-volatile memory chip.
Step 6), merge cells continue to receive the digital signal from transducer, and whether whether the product information in the packet that judgement receives simultaneously consistent with the coefficient in the storage chip of merge cells own with penalty coefficient; If consistent, according to penalty coefficient, signal is compensated, reach the consistency of numeral output, meet the overall precision requirement of electronic mutual inductor, electronic mutual inductor starts normal operation.If inconsistent, outputting alarm signal and perform step 7) or step 8).
If step 7) is changed transducer, after replacing, connect optical fiber, merge cells re-writes transducer by receiving download command by the penalty coefficient Ks of sensing head, then by receiving upload command, the Information ID of transducer and penalty coefficient Kc is saved in merge cells.
If step 8) is changed merge cells, after replacing, connect optical fiber, repeating step 5) and 6).
Concrete, the product information of transmitting between transducer and merge cells and supplementary coefficient are to exchange based on link layer Frame.Table 1 is transducer sends frame format from data to merge cells.Table 2 is merge cells sends frame format from data to transducer.
Table 1
Table 2
The consistency of Electrical Instrument Transducers with Digital output of the present invention comprises the consistent of the characteristics such as amplitude precision, phase accuracy and constant time lag.The present invention passes through each Parameter storage in transducer and merge cells, and complete parameter confirmation and synchronize by transducer and the communication between merge cells, in merge cells, according to parameter, digital quantity is revised, reached the consistent object of electronic mutual inductor overall performance.The default property of the method is strong, without artificial write parameters, simple to operate after dispatching from the factory, and be highly susceptible to maintenance or change, and parameter is stored in respectively two places, and reliability is high.
Should be understood that, for those of ordinary skills, can be improved according to the above description or convert, and all these improvement and conversion all should belong to the protection range of claims of the present invention.Above content is the further description of the present invention being done in conjunction with concrete execution mode, can not assert that specific embodiment of the invention is confined to these explanations.For the those of ordinary skill of the technical field under the present invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (5)
1. a method that guarantees Electrical Instrument Transducers with Digital output-consistence, is characterized in that: its method comprises the following steps:
Step 1), independent testing sensor, record the deviation of its actual output and specified output, is designated as Ks;
Step 2), independent test translator, record the skew of its output, be designated as Kc;
Step 3), transducer receive the data that send by crossing merge cells from host computer, i.e. two groups of deviation compensation COEFFICIENT K s that test obtains and Kc, and be kept in non-volatile memory chip;
After step 4), transducer and transducer combination, transducer sends real-time sampling digital signal to merge cells by optical fiber, sends in the lump production code member ID and penalty coefficient to merge cells in the Frame of same link layer simultaneously;
When step 5), merge cells First Contact Connections, pass through to receive the upload command of host computer, production code member and penalty coefficient that receiving converter sends, and be kept in specific non-volatile memory chip;
Step 6), merge cells read production code member and the penalty coefficient in self non-volatile memory chip, receive the digital signal from transducer simultaneously, confirm whether consistent with storage chip own of the production code member that receives and penalty coefficient; If consistent, according to penalty coefficient, signal is compensated, reach the consistency of numeral output; If inconsistent, outputting alarm signal;
If step 7) need to be changed transducer, connect after optical fiber, merge cells, by receiving the download command of host computer, re-writes transducer by the penalty coefficient Ks of transducer, then by the upload command that receives host computer, the numbering ID of transducer and penalty coefficient Kc is saved in merge cells; If need to change merge cells, repeating step 5 after connection optical fiber) and 6).
2. the method for assurance Electrical Instrument Transducers with Digital output-consistence as claimed in claim 1, it is characterized in that: the merge cells in described step is replaced by transponder, by transponder, export consistent digital signal, access merge cells or need the secondary device of signal.
3. the method for assurance Electrical Instrument Transducers with Digital output-consistence as claimed in claim 1, is characterized in that: the transducer in described step 3) receives penalty coefficient the preservation from merge cells or transponder by optical communication module.
4. the method for assurance Electrical Instrument Transducers with Digital output-consistence as claimed in claim 1, is characterized in that: the merge cells in described step 4) and step 5) or transponder receive to be uploaded or download instruction carry out reception or the transmission of relevant parameter by optical communication module.
5. the method for assurance Electrical Instrument Transducers with Digital output-consistence as claimed in claim 1, is characterized in that: the transducer in described step 7) and the coefficient of transducer are independently, transmit respectively between merge cells and transducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410004670.0A CN103762721B (en) | 2014-01-06 | 2014-01-06 | A kind of method ensureing Electrical Instrument Transducers with Digital output-consistence |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410004670.0A CN103762721B (en) | 2014-01-06 | 2014-01-06 | A kind of method ensureing Electrical Instrument Transducers with Digital output-consistence |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103762721A true CN103762721A (en) | 2014-04-30 |
| CN103762721B CN103762721B (en) | 2016-04-20 |
Family
ID=50529910
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410004670.0A Active CN103762721B (en) | 2014-01-06 | 2014-01-06 | A kind of method ensureing Electrical Instrument Transducers with Digital output-consistence |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103762721B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109036277A (en) * | 2018-09-27 | 2018-12-18 | 京东方科技集团股份有限公司 | Compensation method and compensation device, display device, display methods and storage medium |
| CN112384871A (en) * | 2018-07-12 | 2021-02-19 | 恩德莱斯和豪瑟尔欧洲两合公司 | Method for compensating error functions of field devices in automation systems |
| CN115980439A (en) * | 2023-02-16 | 2023-04-18 | 深圳奥特迅电力设备股份有限公司 | Residual current detection device of distributed alternating current system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201184911Y (en) * | 2008-01-22 | 2009-01-21 | 湖北省电力试验研究院 | Apparatus for calibrating locale error of electronic type mutual-inductor in digitalization transforming plant |
| US20120101760A1 (en) * | 2010-10-26 | 2012-04-26 | Praveen Sutrave | Method of Enabling Calibration of a Current Transformer, and Associated Apparatus |
-
2014
- 2014-01-06 CN CN201410004670.0A patent/CN103762721B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201184911Y (en) * | 2008-01-22 | 2009-01-21 | 湖北省电力试验研究院 | Apparatus for calibrating locale error of electronic type mutual-inductor in digitalization transforming plant |
| US20120101760A1 (en) * | 2010-10-26 | 2012-04-26 | Praveen Sutrave | Method of Enabling Calibration of a Current Transformer, and Associated Apparatus |
Non-Patent Citations (1)
| Title |
|---|
| 金翼等: "基于误差分步测量的电子式互感器及合并单元校验系统的研究与实现", 《电测与仪表》, vol. 50, no. 566, 28 February 2013 (2013-02-28), pages 45 - 49 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112384871A (en) * | 2018-07-12 | 2021-02-19 | 恩德莱斯和豪瑟尔欧洲两合公司 | Method for compensating error functions of field devices in automation systems |
| CN109036277A (en) * | 2018-09-27 | 2018-12-18 | 京东方科技集团股份有限公司 | Compensation method and compensation device, display device, display methods and storage medium |
| CN115980439A (en) * | 2023-02-16 | 2023-04-18 | 深圳奥特迅电力设备股份有限公司 | Residual current detection device of distributed alternating current system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103762721B (en) | 2016-04-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203327181U (en) | Multi-camera-module testing tool | |
| CN103616591B (en) | The simulator of a kind of Intelligent substation merging unit characteristic and emulation mode thereof | |
| CN205333099U (en) | Online automatic calibration temperature and humidity transmitter's calbiration system | |
| CN205992050U (en) | A kind of insulation line monitoring device check system | |
| CN103472736B (en) | A kind of load modeling device based on real-time disturbance data | |
| CN103762721B (en) | A kind of method ensureing Electrical Instrument Transducers with Digital output-consistence | |
| CN204304613U (en) | II type electric energy efficiency office terminal and system | |
| CN105319529A (en) | System and method for calibrating errors of watt-hour meters | |
| CN104184208A (en) | Integrated automation information proofreading system of transformer substation | |
| CN107919176B (en) | Automatic reading system and reading method for EAU system of nuclear power plant | |
| CN103712739A (en) | 3051 intelligent pressure transmitter calibration device | |
| CN103235279B (en) | A kind of electric mutual inductor output verification device | |
| CN103728941A (en) | Material level monitoring method and equipment | |
| CN105204485A (en) | Digital electric power stability control system tester | |
| CN103902518A (en) | Method for automatically compiling monitoring information sheet by computer | |
| CN103901382B (en) | A kind of calibration detection apparatus of time current table | |
| CN202362445U (en) | Electronic type mutual inductor on-site check meter | |
| CN103558474A (en) | Novel merging unit verifying device | |
| CN104502748B (en) | Integrated automation of transformation stations test system | |
| CN203708224U (en) | Multipurpose serial time code decoder | |
| CN203365569U (en) | Electrical health index prediction device of power distribution cabinet | |
| CN204304614U (en) | I type electric energy efficiency office terminal and system | |
| CN104360120B (en) | Real-time waveform display method with low communication bandwidth requirement | |
| CN203178465U (en) | Electronic transformer output calibration device | |
| CN203881927U (en) | Calibration detection device of time current meter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |