CN104155627A - Error characteristic detection method of extra high voltage capacitive voltage transformer - Google Patents
Error characteristic detection method of extra high voltage capacitive voltage transformer Download PDFInfo
- Publication number
- CN104155627A CN104155627A CN201410405865.6A CN201410405865A CN104155627A CN 104155627 A CN104155627 A CN 104155627A CN 201410405865 A CN201410405865 A CN 201410405865A CN 104155627 A CN104155627 A CN 104155627A
- Authority
- CN
- China
- Prior art keywords
- transformer
- voltage transformer
- tester
- potential transformer
- capacitance type
- 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
Abstract
The invention provides an error characteristic detection method of an extra high voltage capacitive voltage transformer. The method comprises the steps that offline transformer on-site handover detection is carried out on an electromagnetic voltage transformer, and the electromagnetic voltage transformer is corrected according to a detection result; the corrected electromagnetic voltage transformer is used as a standard voltage transformer, and an error online detection device is used to carry out online error detection on the capacitive voltage transformer; the capacitive voltage transformer is respectively connected with a three-phase bus transformer outgoing wire and a high resistance outgoing wire; and the electromagnetic voltage transformer is connected with a bus between the transformer and the high resistance. Compared with the prior art, the error characteristic detection method of the extra high voltage capacitive voltage transformer, which is provided by the invention, has the advantages that online error detection can be carried out on the extra high voltage capacitive voltage transformer, which fits the actual situation of the capacitive voltage transformer; and error measurement is more accurate than offline error detection.
Description
Technical field
The present invention relates to a kind of error characteristics detection method of voltage transformer (VT), be specifically related to a kind of error characteristics detection method of extra-high voltage capacitor voltage transformer.
Background technology
For guaranteeing that extra-high voltage transformer reliably puts into operation, need to carry out on-the-spot commissioning test to the extra-high voltage transformer of installing.In UHVAC demonstration project and extension project, the on-the-spot commissioning test of extra-high voltage transformer is mainly that extra-high voltage ratio standard device is transported to behind scene under disconnect state, and extra-high voltage transformer is carried out to error test.
Due to substation structure design optimization, if extra-high voltage high resistance outlet capacitance type potential transformer and high resistance cover tube center distance only have 4m, this distance can meet equipment service requirement, but in the situation of taking out stitches, this distance is less than the safe distance of extra-high voltage capacitor voltage transformer and high resistance under rated voltage, cannot realize error commissioning test under full voltage, therefore cannot guarantee the bringing normally into operation of the extra-high voltage capacitor voltage transformer of whole transformer station.Therefore, in UHVAC demonstration project and extension project thereof, cannot utilize the power transmission engineering high resistance lateral capacitance formula voltage transformer (VT) that existing method need to be tested some to carry out error test.
In addition, due to capacitance type potential transformer design feature, its error characteristics are subject to distributed capacitance and comprehensive Electric Field Distribution to affect very large.As at the scene 750kV and 1000kV capacitance type potential transformer carried out to demonstration test respectively, test findings shows that such environmental effects amount is up to 0.3%.Therefore,, for extra-high voltage capacitor voltage transformer, there is deviation in the actual error under the error recording under off-line state and on-the-spot ruuning situation; Electric pressure is higher, and the impact that proximity effect causes is also just larger.
Therefore, need to provide a kind of and can solve extra-high voltage engineering reality needs, can realize again the error characteristics pick-up unit of the extra-high voltage capacitor voltage transformer of the capacitance type potential transformer actual state of more fitting.
Summary of the invention
In order to meet the needs of prior art, the invention provides a kind of error characteristics detection method of extra-high voltage capacitor voltage transformer, described method is carried out error contrast by described capacitance type potential transformer and standard potential transformer, detects the error characteristics of described capacitance type potential transformer; Described standard potential transformer adopts electromagnetic potential transformer, and described method comprises the steps:
Step 1: the mutual inductor on site handing-over that described electromagnetic potential transformer is carried out under off-line state detects, and proofreaies and correct described electromagnetic potential transformer according to testing result;
Step 2: the electromagnetic potential transformer after proofreading and correct, as standard potential transformer, adopts error on-line measuring device to carry out the error-detecting under presence to described capacitance type potential transformer.
Preferably, capacitance type potential transformer described in described step 2 accesses respectively transformer outlet and the high resistance outlet of three-phase bus; Described electromagnetic potential transformer accesses on the bus between described transformer and described high resistance;
Preferably, described error on-line measuring device comprises voltage transformer (VT) tester, voltage transformer (VT) load tester, oscillograph and signal isolation module; The number of described voltage transformer (VT) tester and Secondary Load of Voltage Transformer tester is two;
Preferably, the capacitance type potential transformer output terminal of transformer outgoing line side is connected with oscillograph with voltage transformer (VT) tester, voltage transformer (VT) load tester respectively;
The capacitance type potential transformer output terminal of high resistance outgoing line side is connected with another voltage transformer (VT) load tester with another voltage transformer (VT) tester respectively;
An output terminal of electromagnetic potential transformer is connected with the three-phase input end of the voltage transformer (VT) tester of transformer outgoing line side, an output terminal is connected with the single-phase input end of the voltage transformer (VT) tester of high resistance outgoing line side, and an output terminal is connected with the single-phase input end of the voltage transformer (VT) load tester of high resistance outgoing line side;
Preferably, in the capacitance type potential transformer output terminal of described transformer outgoing line side and the voltage transformer (VT) tester of described high resistance outgoing line side, access described electromagnetic potential transformer after remaining two-phase input end be connected;
Described voltage transformer (VT) tester, using the single-phase output data of the two-phase output data of the capacitance type potential transformer of described transformer outgoing line side and described electromagnetic potential transformer as normal data, carries out three-phase error-detecting to the capacitance type potential transformer of high resistance outgoing line side;
Preferably, capacitance type potential transformer is connected with oscillograph with described voltage transformer (VT) tester respectively by described signal isolation module; Electromagnetic potential transformer is connected with described voltage transformer (VT) tester by described signal isolation module;
Preferably, capacitance type potential transformer is all directly connected with described voltage transformer (VT) load tester with electromagnetic potential transformer.
Compare with immediate prior art, excellent effect of the present invention is:
1, in technical solution of the present invention, adopt three-phase on-line conversion device to change isolation to system output voltage, and error on-line measuring device is protected, avoid the large electric current of other testing apparatuss on circuit that testing result is produced and disturbed;
2, in technical solution of the present invention, the voltage transformer (VT) tester that adopts measuring accuracy to be carries out error-detecting to electromagnetic transformer and capacitance type potential transformer, can measure the ratio of three-phase voltage simultaneously and differ, meeting the demand that the on-the-spot handing-over of capacitance type potential transformer detects;
3,, in technical solution of the present invention, adopt voltage transformer (VT) load tester monitoring load; Employing is monitored the change in voltage waveform of capacitance type potential transformer and records ripple with the hyperchannel storage oscilloscope of High Pressure Difference sub-probe, is convenient to technician and carries out Faulty Analysis;
4, the error characteristics detection method of a kind of extra-high voltage capacitor voltage transformer provided by the invention, can carry out the error-detecting under presence to extra-high voltage capacitor voltage transformer, more the fit actual state of capacitance type potential transformer, compares error measure compared with off-line error-detecting more accurate.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is further described.
Fig. 1 is: error on-line measuring device connection layout in the embodiment of the present invention;
Fig. 2 is: a kind of error characteristics detection method process flow diagram of extra-high voltage capacitor voltage transformer in the embodiment of the present invention.
Embodiment
Describe embodiments of the invention below in detail, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of identical or similar functions from start to finish.Below by the embodiment being described with reference to the drawings, be exemplary, be intended to for explaining the present invention, and can not be interpreted as limitation of the present invention.
One, a kind of error characteristics detection method that is applicable to extra-high voltage capacitor voltage transformer provided by the invention, carries out error contrast by capacitance type potential transformer and standard potential transformer, according to the error characteristics of error information Detection capacitance formula voltage transformer (VT); Concrete steps are:
1, the mutual inductor on site handing-over of electromagnetic potential transformer being carried out under off-line state detects, and according to testing result, proofreaies and correct electromagnetic potential transformer, thereby the electromagnetic potential mutual inductance after proofreading and correct is as standard potential transformer;
2: the electromagnetic potential transformer after proofreading and correct and capacitance type potential transformer are carried out to the error contrast detection under presence.
Two, in the present embodiment, adopt error on-line measuring device as shown in Figure 1 to carry out error contrast detection to electromagnetic potential transformer and capacitance type potential transformer; Wherein capacitance type potential transformer comprises the capacitance type potential transformer of the transformer outlet and the high resistance outlet that access respectively three-phase bus; Electromagnetic potential transformer accesses on the bus between this transformer and this high resistance.
Error on-line measuring device comprises voltage transformer (VT) tester, voltage transformer (VT) load tester, oscillograph and signal isolation module; Voltage transformer (VT) tester comprises voltage transformer (VT) tester I and voltage transformer (VT) tester II, and voltage transformer (VT) load tester comprises voltage transformer (VT) load tester I and voltage transformer (VT) load tester II; In the present embodiment, isolation module adopts the online converter device of three-phase as shown in 1, system output voltage is changed to isolation, and error on-line measuring device is protected, and avoids the large electric current of other testing apparatuss on circuit that testing result is produced and disturbed.
Voltage transformer (VT) load tester, the load condition while moving for measuring voltage mutual inductor, is convenient to the running status that technician understands voltage transformer (VT);
Oscillograph, for monitoring the output waveform of the capacitance type potential transformer of electromagnetic potential transformer and transformer outgoing line side, carries out fault analysis according to output waveform to capacitance type potential transformer thereby be convenient to technician; Capacitance type potential transformer, electromagnetic potential transformer with the connected mode of error on-line measuring device are respectively:
The capacitance type potential transformer output terminal of transformer outgoing line side is connected with oscillograph with voltage transformer (VT) tester I, voltage transformer (VT) load tester I respectively; The capacitance type potential transformer output terminal of high resistance outgoing line side is connected with voltage transformer (VT) load tester II with voltage transformer (VT) tester II respectively; An output terminal of electromagnetic potential transformer is connected with the three-phase input end of the voltage transformer (VT) tester I of transformer outgoing line side, an output terminal is connected with the single-phase input end of the voltage transformer (VT) tester II of high resistance outgoing line side, and an output terminal is connected with the single-phase input end of the voltage transformer (VT) load tester II of high resistance outgoing line side; After accessing electromagnetic potential transformer in the voltage transformer (VT) tester II of the capacitance type potential transformer output terminal of transformer outgoing line side and high resistance outgoing line side, remaining two-phase input end is connected.
Capacitance type potential transformer is connected with oscillograph with voltage transformer (VT) tester I respectively by signal isolation module; Electromagnetic potential transformer is connected with voltage transformer (VT) tester II by signal isolation module; Capacitance type potential transformer is all directly connected with voltage transformer (VT) load tester with electromagnetic potential transformer.
In the present embodiment, the mutual inductor secondary load of transformation shown in Fig. 2 and secondary step-down test macro are oscillograph, voltage transformer (VT) tester I and II as shown in Figure 1, the system that Secondary Load of Voltage Transformer tester I and II form.
Three, the detailed process that in the present embodiment, error on-line measuring device carries out error characteristics detection to the first winding of capacitance type potential transformer is:
As shown in Figure 2, the three-phase output data of the capacitance type potential transformer of voltage transformer (VT) tester I collection transformer outgoing line side and the A of electromagnetic potential transformer export data mutually, and the A that the A of capacitance type potential transformer exports data and electromagnetic potential transformer is mutually exported to data mutually and carry out homophase detection, the detection mode of adjusting the capacitance type potential transformer of high resistance side outlet according to testing result, comprising:
1.: it is identical with the data that capacitance type potential transformer obtains when carrying out on-the-spot commissioning test that the A of capacitance type potential transformer exports data mutually, and the capacitance type potential transformer of transformer outgoing line side meets examination criteria;
The output data of the B of the capacitance type potential transformer of transformer outgoing line side, C phase are sent in voltage transformer (VT) tester II, voltage transformer (VT) tester II carries out peer according to the output data of described B, C phase to the capacitance type potential transformer of high resistance outgoing line side and detects, thereby judges whether the capacitance type potential transformer of high resistance outgoing line side meets examination criteria;
2.: it is different from the data that capacitance type potential transformer obtains when carrying out on-the-spot commissioning test that the A of capacitance type potential transformer exports data mutually, the error of capacitance type potential transformer is adjusted, until that A exports data is mutually identical with the data that capacitance type potential transformer obtains when carrying out on-the-spot commissioning test.
The method that error on-line measuring device carries out error characteristics detection to second and third winding of capacitance type potential transformer is identical with said process; When the second winding is detected, the three-phase output data of the capacitance type potential transformer of voltage transformer (VT) tester I collection transformer outgoing line side and the B of electromagnetic potential transformer export data mutually; When the tertiary winding is detected, the three-phase output data of the capacitance type potential transformer of voltage transformer (VT) tester I collection transformer outgoing line side and the C of electromagnetic potential transformer export data mutually; Similar when the detection mode of the capacitance type potential transformer of high resistance side outlet and above-mentioned detection the first winding.
Finally should be noted that: described embodiment is only the application's part embodiment, rather than whole embodiment.Embodiment based in the application, those of ordinary skills are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the application's protection.
Claims (7)
1. an error characteristics detection method for extra-high voltage capacitor voltage transformer, described method is carried out error contrast by described capacitance type potential transformer and standard potential transformer, detects the error characteristics of described capacitance type potential transformer; It is characterized in that, described standard potential transformer adopts electromagnetic potential transformer, and described method comprises the steps:
Step 1: the mutual inductor on site handing-over that described electromagnetic potential transformer is carried out under off-line state detects, and proofreaies and correct described electromagnetic potential transformer according to testing result;
Step 2: the electromagnetic potential transformer after proofreading and correct, as standard potential transformer, adopts error on-line measuring device to carry out the error-detecting under presence to described capacitance type potential transformer.
2. the method for claim 1, is characterized in that, capacitance type potential transformer described in described step 2 accesses respectively transformer outlet and the high resistance outlet of three-phase bus; Described electromagnetic potential transformer accesses on the bus between described transformer and described high resistance.
3. the method for claim 1, is characterized in that, described error on-line measuring device comprises voltage transformer (VT) tester, voltage transformer (VT) load tester, oscillograph and signal isolation module; The number of described voltage transformer (VT) tester and Secondary Load of Voltage Transformer tester is two.
4. method as claimed in claim 2 or claim 3, is characterized in that, the capacitance type potential transformer output terminal of transformer outgoing line side is connected with oscillograph with voltage transformer (VT) tester, voltage transformer (VT) load tester respectively;
The capacitance type potential transformer output terminal of high resistance outgoing line side is connected with another voltage transformer (VT) load tester with another voltage transformer (VT) tester respectively;
An output terminal of electromagnetic potential transformer is connected with the three-phase input end of the voltage transformer (VT) tester of transformer outgoing line side, an output terminal is connected with the single-phase input end of the voltage transformer (VT) tester of high resistance outgoing line side, and an output terminal is connected with the single-phase input end of the voltage transformer (VT) load tester of high resistance outgoing line side.
5. method as claimed in claim 4, is characterized in that, the capacitance type potential transformer output terminal of described transformer outgoing line side with in the voltage transformer (VT) tester of described high resistance outgoing line side, access described electromagnetic potential transformer after remaining two-phase input end be connected;
Described voltage transformer (VT) tester, using the single-phase output data of the two-phase output data of the capacitance type potential transformer of described transformer outgoing line side and described electromagnetic potential transformer as normal data, carries out three-phase error-detecting to the capacitance type potential transformer of high resistance outgoing line side.
6. method as claimed in claim 3, is characterized in that, capacitance type potential transformer is connected with oscillograph with described voltage transformer (VT) tester respectively by described signal isolation module; Electromagnetic potential transformer is connected with described voltage transformer (VT) tester by described signal isolation module.
7. method as claimed in claim 3, is characterized in that, capacitance type potential transformer is all directly connected with described voltage transformer (VT) load tester with electromagnetic potential transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410405865.6A CN104155627B (en) | 2014-08-18 | 2014-08-18 | Error characteristic detection method of extra high voltage capacitive voltage transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410405865.6A CN104155627B (en) | 2014-08-18 | 2014-08-18 | Error characteristic detection method of extra high voltage capacitive voltage transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104155627A true CN104155627A (en) | 2014-11-19 |
| CN104155627B CN104155627B (en) | 2017-01-18 |
Family
ID=51881178
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410405865.6A Active CN104155627B (en) | 2014-08-18 | 2014-08-18 | Error characteristic detection method of extra high voltage capacitive voltage transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104155627B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105068035A (en) * | 2015-08-28 | 2015-11-18 | 重庆拉姆达信息技术有限公司 | Voltage transformer error level dynamic detection method and system |
| CN105372617A (en) * | 2015-12-11 | 2016-03-02 | 国网四川省电力公司电力科学研究院 | Three-phase capacitor type voltage transformer error integral verification method |
| CN108020804A (en) * | 2017-11-09 | 2018-05-11 | 中国电力科学研究院有限公司 | A kind of system and method for being used to carry out capacitance type potential transformer site error on-line checking |
| CN108680886A (en) * | 2018-05-24 | 2018-10-19 | 安徽国电京润电力科技有限公司 | Integral electrical voltage transformer automated calibration equipment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11142459A (en) * | 1997-11-07 | 1999-05-28 | Soken Denki Kk | Transformer error testing device with zero load function |
| RU2274871C2 (en) * | 2003-08-07 | 2006-04-20 | Дмитрий Иванович Нефедьев | Device for calibration testing of voltage transformers |
| CN101726715A (en) * | 2009-11-13 | 2010-06-09 | 国网电力科学研究院武汉南瑞有限责任公司 | Online calibration method for error characteristics of voltage transformer for power system |
| CN102854486A (en) * | 2012-09-26 | 2013-01-02 | 湖北省电力公司电力科学研究院 | On-site initiative error-verification system for voltage transformer and method thereof |
| CN103207379A (en) * | 2013-03-22 | 2013-07-17 | 中国电力科学研究院 | Method and device for measuring direct current magnetic bias error characteristics of current transformer |
-
2014
- 2014-08-18 CN CN201410405865.6A patent/CN104155627B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11142459A (en) * | 1997-11-07 | 1999-05-28 | Soken Denki Kk | Transformer error testing device with zero load function |
| RU2274871C2 (en) * | 2003-08-07 | 2006-04-20 | Дмитрий Иванович Нефедьев | Device for calibration testing of voltage transformers |
| CN101726715A (en) * | 2009-11-13 | 2010-06-09 | 国网电力科学研究院武汉南瑞有限责任公司 | Online calibration method for error characteristics of voltage transformer for power system |
| CN102854486A (en) * | 2012-09-26 | 2013-01-02 | 湖北省电力公司电力科学研究院 | On-site initiative error-verification system for voltage transformer and method thereof |
| CN103207379A (en) * | 2013-03-22 | 2013-07-17 | 中国电力科学研究院 | Method and device for measuring direct current magnetic bias error characteristics of current transformer |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105068035A (en) * | 2015-08-28 | 2015-11-18 | 重庆拉姆达信息技术有限公司 | Voltage transformer error level dynamic detection method and system |
| CN105068035B (en) * | 2015-08-28 | 2018-04-13 | 重庆拉姆达信息技术有限公司 | A kind of voltage transformer error horizontal dynamic detection method and system |
| CN105372617A (en) * | 2015-12-11 | 2016-03-02 | 国网四川省电力公司电力科学研究院 | Three-phase capacitor type voltage transformer error integral verification method |
| CN108020804A (en) * | 2017-11-09 | 2018-05-11 | 中国电力科学研究院有限公司 | A kind of system and method for being used to carry out capacitance type potential transformer site error on-line checking |
| CN108680886A (en) * | 2018-05-24 | 2018-10-19 | 安徽国电京润电力科技有限公司 | Integral electrical voltage transformer automated calibration equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104155627B (en) | 2017-01-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102073029B (en) | Electronic mutual inductor test system and test method | |
| CN107677980B (en) | Integrated detection platform and method for metering performance of mutual inductor of power distribution network | |
| CN101424728A (en) | On site precision detecting test line for high-voltage current transformer | |
| CN201319064Y (en) | Test circuit for field accuracy detection of high-voltage current transformer | |
| CN103809010B (en) | For determining the voltage of every phase and the device and method of power of middle-voltage network | |
| CN103018599A (en) | Method for three-phase detection of errors of three-phase electronic transformer of gas insulated switchgear (GIS) | |
| Rathnayaka et al. | On-line impedance monitoring of transformer based on inductive coupling approach | |
| CN104155627A (en) | Error characteristic detection method of extra high voltage capacitive voltage transformer | |
| US9733278B2 (en) | System for measuring loss of HVDC | |
| CN202486269U (en) | State tester of electrical equipment | |
| CN101614798B (en) | Polarity detection system of electronic transformer | |
| CN103913715B (en) | High-voltage measuring box error testing system and error testing method | |
| Dolce et al. | Test instrument for the automatic compliance check of cast resin insulated windings for power transformers | |
| Xu et al. | Monitoring and analysis of electronic current transformer’s field operating errors | |
| CN202948129U (en) | Tester for voltage withstanding test apparatus of electric energy meter | |
| CN110645888A (en) | Winding deformation judgment method based on frequency response analysis FRA | |
| CN202330691U (en) | Field calibrating equipment for voltage transformer | |
| CN109901096A (en) | A kind of capacitance type potential transformer measuring accuracy on-line monitoring system and method | |
| CN103439681A (en) | Electronic current transformer short-time current vibration test device and method thereof | |
| CN103033700A (en) | Detecting device of responding wave form of dynamic reactive power compensation equipment and detecting method of the same | |
| CN113109662A (en) | Method and system for determining relative aging degree of cable based on interphase relative dielectric loss | |
| CN111527661B (en) | Fault location in multi-terminal tapped lines | |
| CN104330761A (en) | Standard voltage ratio device for online error correction for voltage transformer and operation method | |
| CN103163357A (en) | Multi-channel leakage current monitoring system | |
| Yablokov et al. | Research of fault location algorithm for data metering system based on digital transformers |
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 |