CN201436638U - Digital electric energy metering device for conventional transformer station - Google Patents
Digital electric energy metering device for conventional transformer station Download PDFInfo
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- CN201436638U CN201436638U CN2009200139625U CN200920013962U CN201436638U CN 201436638 U CN201436638 U CN 201436638U CN 2009200139625 U CN2009200139625 U CN 2009200139625U CN 200920013962 U CN200920013962 U CN 200920013962U CN 201436638 U CN201436638 U CN 201436638U
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- 239000013307 optical fiber Substances 0.000 claims abstract description 10
- 238000006243 chemical reaction Methods 0.000 claims abstract description 7
- 230000005611 electricity Effects 0.000 claims description 2
- 230000003287 optical effect Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract 1
- 230000005540 biological transmission Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
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Abstract
The utility model relates to a digital electric energy metering device for a conventional transformer station, which comprises an A/D converter, a photoelectric conversion unit, a merge unit, an optical fiber and a digital interface type electric energy meter. The method for using comprises following steps: converting the signal in the current-voltage transformer via an A/D converter; converting the current-voltage analog signal into the digital signal; converting the digital signal into the optical signal via the photoelectric conversion unit; merging via the merge unit; outputting through the optical fiber; and metering with the digital interface type electric energy meter. The utility model has advantages of accurate metering, solves problems of secondary loop voltage drop, open circuit and short circuit, will not generate extra error by substituting the optical cable for the cable and is applicable to the conventional electric energy metering device at different voltage levels.
Description
Technical field
The utility model relates to the electric energy metrical technical field, is a kind of digitalized electric energy measuring apparatus that is used for conventional substation.
Background technology
In the prior art, the electric power meter that is used for conventional substation, the general distance of the measuring apparatus of electric current, voltage transformer (VT) distance detection chamber is all distant, it is longer that the output of current-voltage transformer secondary connects lead, also have in secondary circuit owing to have make and break contact and the bigger load of safety apparatus constant resistance, can cause that secondary circuit voltage drop is bigger, like this, can cause electric energy metering error bigger.In addition, because existing secondary circuit uses cable to transmit, can cause that the construction working amount is big, cost is high, have electric current secondary loop open circuit, defectives such as voltage secondary loop short circuit.
Summary of the invention
The purpose of this utility model provides the digitalized electric energy measuring apparatus that is used for conventional substation of a kind of accurate measurement, safety.
For achieving the above object, the utility model is achieved through the following technical solutions:
The digitalized electric energy measuring apparatus that is used for conventional substation, this device comprises A/D converter, electrooptic switching element, merge cells, optical fiber and digital interface formula electric energy meter, the signal of current-voltage transformer is changed through A/D converter, the current/voltage analog signal conversion is become digital signal, this digital signal converts the electrical signal to light signal through electrooptic switching element then, merge through merging the unit, by optical fiber output, measure then by digital interface formula electric energy meter.
Described digital electricity meter adopts IEC61850 digital interface formula electric energy meter.
This device is suitable for using on each electric pressure tradition electric power meter.
Compared with prior art, the utility model has the advantages that:
1) adopts digital interface formula electric energy meter and supporting digitalized electric energy measuring apparatus to carry out electric energy metrical, measure accurately, can solve the bigger problem of present high-voltage electric-energy meter composition error;
2) on principle, thoroughly solve secondary circuit voltage drop, electric current secondary loop open circuit, voltage secondary loop short circuit problem.
3) replace cable transmission with optical cable, antijamming capability is strong, in the signals transmission, can not produce extra error;
4) many mutual inductor outputs of a stoichiometric point are inserted the merge cells light transmitting device, send into digital interface formula electric energy meter by an optical cable at last, can simplify secondary singal transmission loop greatly, and significantly reduce the site operation amount.
Description of drawings
Fig. 1 is a structural drawing of the present utility model.
Embodiment
See Fig. 1, this device comprises A/D converter, electrooptic switching element, merge cells, optical fiber and digital interface formula electric energy meter, the signal of current-voltage transformer is changed through A/D converter, the current/voltage analog signal conversion is become digital signal, this digital signal converts the electrical signal to light signal through electrooptic switching element then, merge through merging the unit, by optical fiber output, measure then by digital interface formula electric energy meter.
This measuring apparatus is taked the indemnifying measure of the positive and negative counteracting of error, and its error is for being far smaller than 0.4%.Conventional electric energy metered system composition error: γ=γ
z, it is 0.6% that relative I class stoichiometric point is not taked the indemnifying measure normal value.The utility model current-voltage transformer signal becomes digital signal through A/D converter with the current/voltage analog signal conversion, this digital signal converts the electrical signal to light signal through electrooptic switching element then, realize that by merge cells MU it is output as the digital signal that meets the IEC61850 regulation that digital interface formula electric energy meter can receive.
Feature one: the digital interface formula multifunctional electric energy meter that the utility model adopts is the independent development technology, and this table is nearly 1 year of the substation operations such as the little lump of Anshan, liaoning Province; Feature two: the supporting light transmitting device of merge cells that adopts belt current voltage acquisition analog-digital converter; Feature three: the digitalized electric energy metering device of the utility model conventional substation is the data signal Optical Fiber Transmission, and electric energy meter only connects optical fiber except working power, does not also need the secondary opto-electronic conversion.
This device is suitable for using at each electric pressure tradition electric power meter.
Claims (2)
1. the digitalized electric energy measuring apparatus that is used for conventional substation, it is characterized in that, this device comprises A/D converter, electrooptic switching element, merge cells, optical fiber and digital interface formula electric energy meter, the signal of current-voltage transformer is changed through A/D converter, the current/voltage analog signal conversion is become digital signal, and this digital signal converts the electrical signal to light signal through electrooptic switching element then, merges through merging the unit, by optical fiber output, measure then by digital interface formula electric energy meter.
2. the digitalized electric energy measuring apparatus that is used for conventional substation according to claim 1 is characterized in that, described digital electricity meter adopts IEC61850 digital interface formula electric energy meter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200139625U CN201436638U (en) | 2009-05-27 | 2009-05-27 | Digital electric energy metering device for conventional transformer station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200139625U CN201436638U (en) | 2009-05-27 | 2009-05-27 | Digital electric energy metering device for conventional transformer station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201436638U true CN201436638U (en) | 2010-04-07 |
Family
ID=42373087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200139625U Expired - Lifetime CN201436638U (en) | 2009-05-27 | 2009-05-27 | Digital electric energy metering device for conventional transformer station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201436638U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102162842A (en) * | 2011-05-25 | 2011-08-24 | 重庆电力科学试验研究院 | Online check meter of high-voltage electric energy metering device |
| CN102305922A (en) * | 2011-05-25 | 2012-01-04 | 湖南省电力公司科学研究院 | On-load detection method and device for intelligent optical fiber electric energy meter in substation |
| CN103134972A (en) * | 2012-11-12 | 2013-06-05 | 嘉兴电力局 | Intelligent substation digital statistical type voltage monitor |
| CN104569532A (en) * | 2015-01-29 | 2015-04-29 | 国家电网公司 | Collecting-combining-integrated device of electronic transformer |
-
2009
- 2009-05-27 CN CN2009200139625U patent/CN201436638U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102162842A (en) * | 2011-05-25 | 2011-08-24 | 重庆电力科学试验研究院 | Online check meter of high-voltage electric energy metering device |
| CN102305922A (en) * | 2011-05-25 | 2012-01-04 | 湖南省电力公司科学研究院 | On-load detection method and device for intelligent optical fiber electric energy meter in substation |
| CN102162842B (en) * | 2011-05-25 | 2013-04-10 | 重庆市电力公司电力科学研究院 | Online check meter of high-voltage electric energy metering device |
| CN102305922B (en) * | 2011-05-25 | 2013-09-04 | 湖南省电力公司科学研究院 | On-load detection method and device for intelligent optical fiber electric energy meter in substation |
| CN103134972A (en) * | 2012-11-12 | 2013-06-05 | 嘉兴电力局 | Intelligent substation digital statistical type voltage monitor |
| CN104569532A (en) * | 2015-01-29 | 2015-04-29 | 国家电网公司 | Collecting-combining-integrated device of electronic transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: STATE ELECTRIC NET CROP. Effective date: 20121023 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20121023 Address after: 114002 Anshan South Road, Tiedong District, Liaoning, Shengli Road, No. 33 Patentee after: Anshan Power Supply Company, Liaoning Electric Power Co., Ltd. Patentee after: State Grid Corporation of China Address before: 114002 Anshan South Road, Tiedong District, Liaoning, Shengli Road, No. 33 Patentee before: Anshan Power Supply Company, Liaoning Electric Power Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20100407 |
|
| CX01 | Expiry of patent term |