CN105207167B - A kind of guard method of anti-misplacement CT protections system - Google Patents
A kind of guard method of anti-misplacement CT protections system Download PDFInfo
- Publication number
- CN105207167B CN105207167B CN201510561296.9A CN201510561296A CN105207167B CN 105207167 B CN105207167 B CN 105207167B CN 201510561296 A CN201510561296 A CN 201510561296A CN 105207167 B CN105207167 B CN 105207167B
- Authority
- CN
- China
- Prior art keywords
- misplacement
- protection device
- resistance
- protection
- slide rheostat
- 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.)
- Active
Links
- 230000004224 protection Effects 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000007789 sealing Methods 0.000 claims abstract description 5
- 230000005611 electricity Effects 0.000 claims 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Landscapes
- Adjustable Resistors (AREA)
- Measuring Volume Flow (AREA)
Abstract
The present invention relates to a kind of guard method of anti-misplacement CT protections system, comprise the following steps that：(1) present apparatus slide rheostat resistance is located at maximum when sealing CT, now connects almost no electric current and flow through the present apparatus, (2) and then slowly reduce resistance, meanwhile, observe poor flow valuve；Resistance is persistently reduced, until reaching conducting state；(3) when producing difference stream in finding protection device during reducing resistance, stop reducing resistance；Check that reason prevents protection act.This protection device is installed and used in systems, will not also act running protection in the case of wrong current transformer is sealed, and can in time be found to correct mistake, be lifted security.
Description
Technical field
Do not have a power failure the present invention relates to relay protection and change protection device, especially a kind of protection side of anti-misplacement CT protections system
Method.
Background technology
In order to ensure the stable operation of power network when upgrading protection device, take not have a power failure and change wherein a set of protection
Device.Protection device has two sets of wherein a set of another set of replacings out of service of operation, and this requires that group electric current replacing is mutual
Sensor is shut on protection disk, avoids current transformer from opening a way.Current transformer was sealed in former work to carry out using wire
CT work is sealed, transformation and other reasonses are likely to cause misplacement current transformer due to drawing and repeatedly when sealing current transformer
Running protection is caused to act.
The content of the invention
It is an object of the invention in place of overcome the deficiencies in the prior art, there is provided a kind of simple in construction, safe and reliable, installation
The guard method of convenient anti-misplacement CT protections system.
The present invention solves its technical problem and takes following technical scheme to realize：
A kind of guard method of anti-misplacement CT protections system, it is characterised in that：Comprise the following steps that：
(1) present apparatus slide rheostat resistance is located at maximum when sealing CT, now connects almost no electric current and flow through this dress
Put,
(2) and then slowly resistance is reduced, meanwhile, observe poor flow valuve；Resistance is persistently reduced, until reaching conducting state；
(3) when producing difference stream in finding protection device during reducing resistance, stop reducing resistance；Check that reason prevents
Protection act.
Moreover, protection system used by this method, in CT and the circuit loop of protection device composition, in circuit with CT
A running protection device is parallel with, the running protection device is composed in series by a slide rheostat and a galvanometer.
Moreover, the electric current is calculated as high-precision current meter.
The advantages and positive effects of the present invention are：
This protection device is installed and used in systems, will not also protect operation in the case of wrong current transformer is sealed
Shield acts, and can in time find to correct mistake, lift security.
Brief description of the drawings
Fig. 1 is circuit diagram of the present invention.
Embodiment
Below in conjunction with the accompanying drawings and the invention will be further described by specific embodiment, and following examples are descriptive
, it is not limited, it is impossible to which protection scope of the present invention is limited with this.
A kind of guard method of anti-misplacement CT protection system, protection system used by this method, in CT and protection device
The circuit loop of composition, an anti-misplacement protection device is parallel with CT in circuit, the anti-misplacement protection device includes one
Slide rheostat and a high precision electro flowmeter, the slide rheostat and high precision electro flowmeter are in series；
Comprise the following steps that：
(1) present apparatus slide rheostat resistance is located at maximum when sealing CT, now connects almost no electric current and flow through this dress
Put；
(2) resistance and then is slowly reduced, while poor flow valuve can be observed in running protection device, if without poor stream
Continue to reduce resistance, until reaching conducting state；
(3) stop reducing resistance when producing difference stream in finding protection device during reducing resistance；Check that reason prevents from protecting
Shield acts.
Although disclosing embodiments of the invention and accompanying drawing for the purpose of illustration, those skilled in the art can manage
Solution：Do not departing from the present invention and spirit and scope of the appended claims in, it is various replace, change and modifications all be it is possible,
Therefore, the scope of the present invention is not limited to embodiment and accompanying drawing disclosure of that.
Claims (2)
- A kind of 1. guard method of anti-misplacement CT protections system, it is characterised in that：In the circuit loop of CT and protection device composition, protection system sets an anti-misplacement protection device, and the anti-misplacement is protected Protection unit is in parallel with CT, and the anti-misplacement protection device is composed in series by a slide rheostat and a galvanometer, the protection Method comprises the following steps that：(1) the slide rheostat resistance in the anti-misplacement protection device is located at maximum when sealing CT, now connected almost without electricity Stream flows through anti-misplacement protection device；(2) and then slowly slide rheostat resistance is reduced, meanwhile, observe poor flow valuve in anti-misplacement protection device；It is if not poor Stream then continues to reduce resistance, until reaching conducting state；(3) when finding difference stream during reducing slide rheostat resistance, stop reducing slide rheostat resistance；Check that reason is prevented Only protection act.
- 2. the guard method of anti-misplacement CT protections system according to claim 1, it is characterised in that：The electric current is calculated as high-precision Spend galvanometer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510561296.9A CN105207167B (en) | 2015-09-07 | 2015-09-07 | A kind of guard method of anti-misplacement CT protections system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510561296.9A CN105207167B (en) | 2015-09-07 | 2015-09-07 | A kind of guard method of anti-misplacement CT protections system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105207167A CN105207167A (en) | 2015-12-30 |
| CN105207167B true CN105207167B (en) | 2018-03-06 |
Family
ID=54954679
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510561296.9A Active CN105207167B (en) | 2015-09-07 | 2015-09-07 | A kind of guard method of anti-misplacement CT protections system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105207167B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2221254Y (en) * | 1994-06-14 | 1996-02-28 | 汤赣生 | Device for preventing error connecting of secondary terminal of current transformer |
| CN201655528U (en) * | 2009-12-07 | 2010-11-24 | 河南省电力公司郑州供电公司 | Multi-purpose CT secondary short-circuited terminal |
| CN104183379A (en) * | 2014-08-07 | 2014-12-03 | 国家电网公司 | Connecting device for maintenance of secondary side of electric power current transformer |
-
2015
- 2015-09-07 CN CN201510561296.9A patent/CN105207167B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2221254Y (en) * | 1994-06-14 | 1996-02-28 | 汤赣生 | Device for preventing error connecting of secondary terminal of current transformer |
| CN201655528U (en) * | 2009-12-07 | 2010-11-24 | 河南省电力公司郑州供电公司 | Multi-purpose CT secondary short-circuited terminal |
| CN104183379A (en) * | 2014-08-07 | 2014-12-03 | 国家电网公司 | Connecting device for maintenance of secondary side of electric power current transformer |
Non-Patent Citations (1)
| Title |
|---|
| 电流互感器二次开路保护装置的应用分析和改进;徐惜琼 等;《无线互联科技》;20140315;第128-130页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105207167A (en) | 2015-12-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107069682B (en) | A kind of HVDC transmission line back-up protection method based on DC control system | |
| CN107681626A (en) | The protection circuit and its control method of air-conditioner controller | |
| CN104253426A (en) | Lightning protection circuit and lightning protection method for direct-current power supply port of communication equipment | |
| CN103762569B (en) | Analyses for double circuits on same tower two-phase short circuit and ground fault discriminating direction method | |
| CN104502883B (en) | The abnormality detection and solution of computation chip | |
| CN102393492A (en) | Full-automatic mining comprehensive protector testing system | |
| CN105207167B (en) | A kind of guard method of anti-misplacement CT protections system | |
| JP5905560B2 (en) | Power supply device with input voltage detection function and operation method thereof | |
| CN106356814B (en) | A kind of series transformer winding over-voltage protection method based on voltage vector difference | |
| CN103645454B (en) | The method of calibration of DC current measurement equipment polarity in a kind of DC transmission system | |
| CN106772122A (en) | A kind of safe level DCS power supplys diversity detection method | |
| CN104183379A (en) | Connecting device for maintenance of secondary side of electric power current transformer | |
| CN105429119B (en) | A kind of over-current protection method and device of submersible electric pump test system | |
| CN106816862B (en) | A kind of one-terminal data phase selection element based on voltage and non-faulting phase current | |
| CN104600684A (en) | Active arc extinguishing type three-tripping surge protection device | |
| CN110323725A (en) | A kind of DC line sample rate current modification method, differential protecting method and system | |
| CN105116221B (en) | A kind of arrester voltage follow method of discrimination and device | |
| CN105842543B (en) | Essential safe type grounding resistance measuring system | |
| CN103762561B (en) | HVDC (High Voltage Direct Current) transmission system DC differential protection setting method | |
| CN104682522A (en) | Charger for battery | |
| CN205489487U (en) | Prevent overflowing detection circuitry and switch protection circuit | |
| CN205176096U (en) | Eliminate or suppression secondary pressure drop device | |
| CN103091544A (en) | Direct current electric leakage detection circuit | |
| CN103280777A (en) | Circuit protection method and system of double-electrode high-voltage direct current transmission system | |
| CN203101481U (en) | High-precision AC sampling system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |