CN105785307A - Method of determining calibration value of high-power-grade and small-capacity transformer measuring instrument - Google Patents
Method of determining calibration value of high-power-grade and small-capacity transformer measuring instrument Download PDFInfo
- Publication number
- CN105785307A CN105785307A CN201610207197.5A CN201610207197A CN105785307A CN 105785307 A CN105785307 A CN 105785307A CN 201610207197 A CN201610207197 A CN 201610207197A CN 105785307 A CN105785307 A CN 105785307A
- Authority
- CN
- China
- Prior art keywords
- transformer
- value
- transformator
- power transducer
- ull
- 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
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
Abstract
The invention relates to a measuring instrument calibration technology, discloses a method of determining the calibration value of a high-power-grade and small-capacity transformer measuring instrument, and belongs to the technical field of measuring instruments. The method specifically comprises the following steps: S1, acquiring the rated capacity (Se) of a transformer; S2, determining the full-scale value (Pb2) of a power transmitter in a transformer measuring instrument according to the rated capacity (Se) of the transformer; and S3, acquiring the ratio of the product of the full-scale value (Pb2) of the power transmitter and the transformation ratio (Ni) of a current transformer to the product of the full-scale value (Pb2) of the power transmitter and the transformation ratio (Ni) of a voltage transformer as the calibration value (Pbx) of the power transmitter, wherein the calibration value (Pbx) of the power transmitter is the calibration value of the transformer measuring instrument.
Description
Technical field
The present invention relates to measurement instrument collimation technique field, particularly a kind of defining method measuring meter calibration values for voltage levels small capacity transformer.
Technical background
Part power plant in power system at present, the Financial cost obtaining starting/stand-by power supply from low voltage grade (such as 220kV and following) system is higher, utilize accessed voltage levels (as 500kV and more than) in the factory of power system booster stations to obtain the Financial cost of power supply relatively low and be relatively easy to.Therefore, the mode of connection being directly accessed voltage levels booster stations for drawing the low capacity startup/standby transformer (such as rated capacity 63MVA and following) picking up dynamic/stand-by power supply obtains large-scale use.Accompanying drawing 1 show the transformator of certain case history and the connection diagram of transformer.
The no-load voltage ratio of the measurement level current transformer of transformator is typically based on the rated current of transformator and selects, but need to check dynamic and thermal stability.Wiring as shown in Figure 1, owing to accessing voltage levels system, current transformer ratio is bigger, startup/standby transformer rated current is less comparatively speaking, its no-load voltage ratio measuring level current transformer meets dynamic and thermal stability and requires but to mate with the rated capacity of transformator, so the actual Verification of Measuring Current Transformer no-load voltage ratio chosen is 200/1A.
In conventional approach, the ull-scale value of power transducer is a rated current product of a rated voltage summation current transformer of voltage transformerTimes, when accessing voltage levels, the actual Verification of Measuring Current Transformer no-load voltage ratio chosen is 200/1A, so a rated current of voltage transformer rated voltage summation current transformer is much larger than transformator rated value, make the ull-scale value of power transducer much larger than actual measured value, not reaching one of ull-scale value forty, make measurement inaccuracy, the calibration value of power transducer now is unsatisfactory for actual measurement demand.
Summary of the invention
The ull-scale value of instrument is measured much larger than real output value for the small capacity transformer of voltage levels in prior art, full scale calibration value is unsatisfactory for the technical problem of measurement demand, and the present invention proposes a kind of defining method measuring meter calibration values for voltage levels small capacity transformer.
The technical scheme is that such:
A kind of defining method measuring meter calibration values for voltage levels small capacity transformer, specifically includes following steps:
Step one, obtain transformator rated capacity (Se)；
Step 2, rated capacity (S according to described transformatore) determine that power transducer ull-scale value (P in instrument measured by transformatorb2)；
Step 3, described power transducer ull-scale value (Pb2) and current transformer ratio (Ni) and voltage transformer no-load voltage ratio (Nu) ratio of product is retrieved as the calibration value (P of power transducerbx), the calibration value (P of described power transducerbx) it is transformator measurement meter calibration values.
Further, said method includes transformator and measures power transducer ull-scale value in instrument and determine process, rated capacity (Se) between ull-scale value 5/2 to six/3rds, power transducer ull-scale value (Pb2) for rated capacity (Se) 1.2～1.5 times.
Relative on now methodical basis, said method is adopted to provide the benefit that: to determine ull-scale value and the calibration value of transmitter according to the rated capacity of transformator, make the actual measured value of measurement instrument no less than measuring 1/3rd of instrument ull-scale value, the actual maximum measured reaches between 5th/2 to six/3rds of measurement instrument ull-scale value, effectively reduce the error brought when observing value, improve certainty of measurement.
Accompanying drawing explanation
Fig. 1 is the link schematic diagram of transformator and transformer.
Detailed description of the invention
Now the present invention is described further.
The invention discloses a kind of defining method measuring meter calibration values for voltage levels small capacity transformer, specifically include following steps: obtain the rated capacity (S of transformatore)；Rated capacity (S according to described transformatore) determine that power transducer ull-scale value (P in instrument measured by transformatorb2)；Described power transducer ull-scale value (Pb2) and current transformer ratio (Ni) and voltage transformer no-load voltage ratio (Nu) ratio of product is retrieved as the calibration value (P of power transducerbx), the calibration value (P of described power transducerbx) it is transformator measurement meter calibration values.
As it is shown in figure 1, wherein transformator access voltage levels, the rated voltage of transformator is 500kV, wherein transformator be for rated capacity (Se) for 50MVA, current transformer ratio (Ni) it is 200/1, voltage transformer (Nu) it is
Rated capacity (Se) it is the maximum apparent energy value under normal operating conditions, under normal operating conditions, actual measured value is at least up to measuring 1/3rd of instrument ull-scale value, maximum apparent energy value is between ull-scale value 5/2 to six/3rds, and the ull-scale value measuring instrument is retrieved as rated capacity (Se) 1.2～1.5 times between, the present embodiment takes 1.4, it is thus achieved that the ull-scale value of power transducer is Pb2=1.4 × 50MVA=70MVA.
According to power transducer ull-scale value (Pb2) and current transformer ratio (Ni) and voltage transformer no-load voltage ratio (Nu) ratio of product is retrieved as the calibration value (P of power transducerbx),Pbx=Pb2/(Ni·Nu), obtain the calibration value (P of power transducerbx) for 70W/Var.When power transducer is active power transmitter, corresponding unit is selected to get the calibration value (P of power transducerbx) for 70W；When power transducer is reactive power transmitter, corresponding unit is selected to get the calibration value (P of power transducerbx) for 70Var.Calibration value (the P of described power transducerbx) it is transformator measurement meter calibration values.
Although the technology contents of the present invention is with preferably example openly as above; but it is not limited to the present invention; if those skilled in the art, the unsubstantiality made in the spirit without departing from the present invention changes or improves, and all should belong to the scope of the claims in the present invention protection.
Claims (2)
1. measure a defining method for meter calibration values for voltage levels small capacity transformer, specifically include following steps:
Step one, obtain transformator rated capacity (Se)；
Step 2, rated capacity (S according to described transformatore) determine that power transducer ull-scale value (P in instrument measured by transformatorb2)；
Step 3, described power transducer ull-scale value (Pb2) and current transformer ratio (Ni) and voltage transformer no-load voltage ratio (Nu) ratio of product is retrieved as the calibration value (P of power transducerbx), the calibration value (P of described power transducerbx) it is transformator measurement meter calibration values.
2. the defining method measuring meter calibration values for voltage levels small capacity transformer as claimed in claim 1, it is characterised in that described power transducer ull-scale value (Pb2) for rated capacity (Se) 1.2～1.5 times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610207197.5A CN105785307A (en) | 2016-04-01 | 2016-04-01 | Method of determining calibration value of high-power-grade and small-capacity transformer measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610207197.5A CN105785307A (en) | 2016-04-01 | 2016-04-01 | Method of determining calibration value of high-power-grade and small-capacity transformer measuring instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105785307A true CN105785307A (en) | 2016-07-20 |
Family
ID=56395594
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610207197.5A Pending CN105785307A (en) | 2016-04-01 | 2016-04-01 | Method of determining calibration value of high-power-grade and small-capacity transformer measuring instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105785307A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2032714U (en) * | 1988-02-14 | 1989-02-15 | 刘长明 | Digital electric transferring device checker |
| US20090322307A1 (en) * | 2008-06-27 | 2009-12-31 | Naoki Ide | Power Transfer Device, Power Supply Device and Power Receiving Device |
| CN203178469U (en) * | 2013-04-18 | 2013-09-04 | 何玉民 | Portable transmitter verification meter |
-
2016
- 2016-04-01 CN CN201610207197.5A patent/CN105785307A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2032714U (en) * | 1988-02-14 | 1989-02-15 | 刘长明 | Digital electric transferring device checker |
| US20090322307A1 (en) * | 2008-06-27 | 2009-12-31 | Naoki Ide | Power Transfer Device, Power Supply Device and Power Receiving Device |
| CN203178469U (en) * | 2013-04-18 | 2013-09-04 | 何玉民 | Portable transmitter verification meter |
Non-Patent Citations (2)
| Title |
|---|
| 任元会等: "《工业与民用配电设计手册》", 31 October 2005, 中国电力出版社 * |
| 孙如琦: ""功率表量程选择及与变送器的匹配"", 《电力建设》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9876352B2 (en) | Voltage stability monitoring in power systems | |
| US20180024900A1 (en) | Methods and system for detecting false data injection attacks | |
| CN104836529B (en) | Fault diagnosis method for output current of on-orbit satellite solar cell array | |
| CN203241127U (en) | Electronic scale with temperature auto-compensation, and calibration system | |
| CN105353256A (en) | Electric transmission and transformation device state abnormity detection method | |
| US11169189B2 (en) | Systems and methods for operating generators based on generator steady state stability limits | |
| CN103413585A (en) | Digital out-of-pile nuclear measurement system based on PC/104 bus | |
| CN104793172A (en) | Temperature segmentation calibrating and metering method of power metering device | |
| CN105262146B (en) | Power system spare capacity computational methods and system containing wind-powered electricity generation | |
| CN101339815B (en) | Process checking gauge and design method thereof | |
| CN107359624B (en) | Method for improving primary frequency modulation response accuracy of unit | |
| CN116613896B (en) | Data acquisition monitoring method based on micro-grid | |
| CN105785307A (en) | Method of determining calibration value of high-power-grade and small-capacity transformer measuring instrument | |
| CN108318823A (en) | A kind of lithium battery charge state evaluation method based on noise tracking | |
| CN201281609Y (en) | Process check meter | |
| CN110571790B (en) | Method and system for online voltage stability early warning based on Thevenin equivalence | |
| CN102103199A (en) | Digital signal generating device and method based on three-phase power system model | |
| CN105720914B (en) | The detection method and device of photovoltaic generating system working condition | |
| CN103336199A (en) | Device and method for predicting fault rate of totally-closed tube type busbar | |
| Wang et al. | Research on the impact of wind power integration on power system voltage stability | |
| CN107767060B (en) | Theoretical line loss calculation system and method for distribution network line | |
| CN113255147B (en) | CVT capacitance online monitoring method and device, terminal equipment and storage medium | |
| CN114844070A (en) | Method for improving new energy capacity value based on energy storage capacity configuration strategy | |
| Molver et al. | Investigation of the impact of grid-integrated distributed generation on MV network voltage using load flow sensitivities | |
| CN105429143B (en) | A kind of harmonic quality monitoring point site selecting method for specializing in line for electric system photovoltaic |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160720 |