CN109633352A - The method for checking three-phase or the secondary wiring of biphase current mutual inductor using single-phase alternating current - Google Patents
The method for checking three-phase or the secondary wiring of biphase current mutual inductor using single-phase alternating current Download PDFInfo
- Publication number
- CN109633352A CN109633352A CN201811534034.3A CN201811534034A CN109633352A CN 109633352 A CN109633352 A CN 109633352A CN 201811534034 A CN201811534034 A CN 201811534034A CN 109633352 A CN109633352 A CN 109633352A
- Authority
- CN
- China
- Prior art keywords
- current
- phase
- mutual inductor
- primary side
- phase alternating
- 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
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
A method of three-phase or the secondary wiring of biphase current mutual inductor are checked using single-phase alternating current, threephase current transformer A, B, C primary side is sequentially connected in series along polarity or is sequentially connected in series two-phase current mutual inductor A, C primary side along polarity, adds single-phase alternating current to the current transformer primary side being together in series；There is current transformer if it is three-phase, then measures electric current between the every phase phase current of threephase current transformer secondary side and Y point-earth (N)；Have current transformer if it is two-phase, then measure the every phase phase current of biphase current mutual inductor secondary side and Y it is point-earth between (N) electric current.The present invention by phase current and point-earth (N) the amount of current relationship of Y it may determine that secondary wiring of current mutual inductor whether just, the reliable in action of current protection when effectively can guarantee to break down using the present invention, to guarantee equipment and personnel safety.
Description
Technical field:
The invention belongs to high-voltage power supply and distribution system construction fields, in particular to a kind of to check three-phase using single-phase alternating current
Or the method for the secondary wiring of biphase current mutual inductor.
Background technique:
High pressure power supply and distribution is widely used in each industrial circle, and current transformer is the electric current inspection in high-voltage power supply and distribution system
Original part is surveyed, current protection and current measurement are used for.When electric short circuit failure occurs, current protection can it is reliable, accurate, whether
Failure can be quickly cut off, electrical equipment and personal safety are directly related to.So only guaranteed secondary wiring of current mutual inductor
It is correct, just can guarantee the reliable in action of current protection when breaking down, to just can guarantee equipment and personnel safety, otherwise shadow
Plant produced is rung, heavy economic losses is caused.
Summary of the invention:
The object of the invention is that overcome above-mentioned the deficiencies in the prior art, and provides and a kind of utilize single phase ac
The method of galvanoscopy three-phase or the secondary wiring of biphase current mutual inductor, it is electric when effectively can guarantee to break down using this method
The reliable in action of protection is flowed, to guarantee equipment and personnel safety.
As above design, the technical scheme is that a kind of check that three-phase or biphase current are mutual using single-phase alternating current
The method of the secondary wiring of sensor, it is characterised in that: be sequentially connected in series threephase current transformer A, B, C primary side along polarity or by two
Phase current mutual inductor A, C primary side is sequentially connected in series along polarity, adds single-phase alternating current to the current transformer primary side being together in series
Stream；There is current transformer if it is three-phase, then measures between the every phase phase current of threephase current transformer secondary side and Y point-earth (N)
Electric current, for symmetrical three-phase alternating current vector relations are as follows:Add the identical list of direction vector
Phase alternating current flow relation are as follows: IY-N=IA+IB+IC=3IA=3IB=3IC；There is current transformer if it is two-phase, then measures two-phase
(N) electric current between the every phase phase current in Current Transformer Secondary side and Y are point-earth, two-phase alternating current vector relations are as follows:Add the identical single-phase alternating current flow relation in direction are as follows: IY-N=IA+IC=2IA=2IC, pass through mutually electricity
Stream and point-earth (N) the amount of current relationship of Y it may determine that secondary wiring of current mutual inductor whether just.
The above-mentioned current transformer primary side being together in series adds the current value of single-phase alternating current to be higher than a rated current
30%.
Present invention employs the principle three-phases of three-phase current vector relationship or the secondary wiring of biphase current mutual inductor to be examined
It surveys, when electric short circuit failure occurs, can rapidly and accurately cut off failure, be connect to be effectively guaranteed Current Transformer Secondary
Line it is correct, ensure that equipment and personnel safety.And the present invention needs equipment few, easy to operate, safe and reliable, accurate.
Detailed description of the invention:
Fig. 1 is the circuit theory schematic diagram of the present invention detection secondary wiring of threephase current transformer；
Fig. 2 is the circuit theory schematic diagram of the present invention detection secondary wiring of two-phase current mutual inductor.
In figure: TY--- automatic coupling voltage regulator；B--- strong current generator.
Specific embodiment:
A method of three-phase or the secondary wiring of biphase current mutual inductor are checked using single-phase alternating current, use three-phase
The principle of current vector relationship, needs two people to operate, and a people adds single-phase alternating current, a secondary electricity of people's measurement current transform er
Stream.
Detection method is carried out to the secondary wiring of threephase current transformer as shown in Figure 1: are as follows: A, B, C three-phase current mutual inductance
Secondary winding uses Y connection, i.e. three-phase and formula wiring, current relationship are as follows: IY-N=IA+IB+IC, way is: A phase current is mutual
The P of sensor primary side2End and B phase current mutual inductor primary side P1End, B phase current mutual inductor primary side P2End and the mutual inductance of C phase current
Device primary side P1End is connected with high current line, from A phase current mutual inductor primary side P1End and C phase current mutual inductor primary side P2End
Add single phase ac, added electric current is that Current Transformer Secondary electric current is 1 ampere, records A phase, B phase, C phase Current Transformer Secondary
Side electric current and point-earth (N) electric current of Y.If surveyed electric current IA=IB=IC=1 (ampere), and IY-N=3 (amperes), i.e. IY-N=
3IA=3IB=3IC, then threephase current transformer secondary connection is correct, otherwise, threephase current transformer secondary connection mistake.
It is as shown in Figure 2: detection method to be carried out to the secondary wiring of threephase current transformer are as follows: A, C biphase current mutual inductor
Using incomplete Y connection, i.e. two-phase and formula wiring, current relationship are as follows: IY-N=IA+IC, way is: A phase current mutual inductor
Primary side P2End and C phase current mutual inductor primary side P1End is connected with high current line, from A phase current mutual inductor primary side P1End and C
Phase current mutual inductor primary side P2End plus single phase ac, added electric current is that Current Transformer Secondary electric current is 1 ampere, record A phase,
C phase current mutual inductor secondary side current and point-earth (N) electric current of Y.If surveyed electric current IA=IC=1 (ampere), and IY-N=2
(ampere), i.e. IY-N=2IA=2IC, then biphase current mutual inductor secondary connection is correct, and otherwise, biphase current mutual inductor is secondary to be connect
Line mistake.
Claims (2)
1. a kind of method for checking three-phase or the secondary wiring of biphase current mutual inductor using single-phase alternating current, it is characterised in that:
By threephase current transformer A, B, C primary side be sequentially connected in series along polarity or by two-phase current mutual inductor A, C primary side along polarity according to
Secondary series connection adds single-phase alternating current to the current transformer primary side being together in series；There is current transformer if it is three-phase, then
Electric current between the every phase phase current of threephase current transformer secondary side and Y point-earth (N) is measured, symmetrical three-phase alternating current is flowed to
Magnitude relation are as follows:Add the identical single-phase alternating current flow relation of direction vector are as follows: IY-N=IA+IB+IC
=3IA=3IB=3IC；There is current transformer if it is two-phase, then measures the every phase phase current of biphase current mutual inductor secondary side and Y
Point-earth (N) electric current, two-phase alternating current vector relations are as follows:Add the identical single phase ac in direction
Current relationship are as follows: IY-N=IA+IC=2IA=2IC, by point-earth (N) the amount of current relationship of phase current and Y it may determine that electricity
Just whether current transformer secondary connection.
2. a kind of utilization single-phase alternating current according to claim 1 checks three-phase or the secondary wiring of biphase current mutual inductor
Method, it is characterised in that: the above-mentioned current transformer primary side being together in series add single-phase alternating current current value be higher than one
The 30% of secondary rated current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811534034.3A CN109633352A (en) | 2018-12-14 | 2018-12-14 | The method for checking three-phase or the secondary wiring of biphase current mutual inductor using single-phase alternating current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811534034.3A CN109633352A (en) | 2018-12-14 | 2018-12-14 | The method for checking three-phase or the secondary wiring of biphase current mutual inductor using single-phase alternating current |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109633352A true CN109633352A (en) | 2019-04-16 |
Family
ID=66074102
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811534034.3A Pending CN109633352A (en) | 2018-12-14 | 2018-12-14 | The method for checking three-phase or the secondary wiring of biphase current mutual inductor using single-phase alternating current |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109633352A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110703173A (en) * | 2019-10-30 | 2020-01-17 | 中国三冶集团有限公司 | High-voltage switch cabinet current transformer transformation ratio polarity test rapid debugging structure and method |
| CN110749834A (en) * | 2019-11-26 | 2020-02-04 | 广东电网有限责任公司 | On-load test analysis method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103809039A (en) * | 2013-12-02 | 2014-05-21 | 国家电网公司 | Method for testing current transformers in substation |
| CN104597372A (en) * | 2014-12-31 | 2015-05-06 | 中国二冶集团有限公司 | Method for verifying relay protection secondary system |
| CN104698335A (en) * | 2013-12-06 | 2015-06-10 | 中冶天工集团有限公司 | Method for realizing systematic debugging of high-voltage transformer substation by using low-voltage electricity |
-
2018
- 2018-12-14 CN CN201811534034.3A patent/CN109633352A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103809039A (en) * | 2013-12-02 | 2014-05-21 | 国家电网公司 | Method for testing current transformers in substation |
| CN104698335A (en) * | 2013-12-06 | 2015-06-10 | 中冶天工集团有限公司 | Method for realizing systematic debugging of high-voltage transformer substation by using low-voltage electricity |
| CN104597372A (en) * | 2014-12-31 | 2015-05-06 | 中国二冶集团有限公司 | Method for verifying relay protection secondary system |
Non-Patent Citations (1)
| Title |
|---|
| 李元锋 等: "互感器二次回路安装试验及检查方法", 《电力安全技术》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110703173A (en) * | 2019-10-30 | 2020-01-17 | 中国三冶集团有限公司 | High-voltage switch cabinet current transformer transformation ratio polarity test rapid debugging structure and method |
| CN110749834A (en) * | 2019-11-26 | 2020-02-04 | 广东电网有限责任公司 | On-load test analysis method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104267368B (en) | A kind of current transformer for metering secondary circuit failure monitoring method | |
| CN103840437B (en) | The quick diagnosis of power distribution network ferromagnetic resonance and singlephase earth fault and processing method | |
| CN102608485B (en) | Detection method for zero-sequence current loops of transformer substations | |
| CN106771647A (en) | A kind of low current neutral grounding electric network capacitance current measurement method | |
| CN103454544B (en) | A kind of detection method based on the linear magnetism elimination circuit of electronic jumper | |
| CN103683198B (en) | The excitation surge current method for quickly identifying of consecutive points distance in a kind of plane based on difference current adjacent order difference composition | |
| CN103777077B (en) | Wireless Clamp Phase Detector | |
| CN103454558B (en) | A kind of bipolar direct current transmission system voltage fluctuation fault detection method and device | |
| CN102565618A (en) | Method for detecting zero-sequence voltage circuit of transformer substation | |
| CN107300684B (en) | A kind of check method in transformer differential protection secondary circuit | |
| CN107121614B (en) | A kind of duplex configuration of bus protection transformation current loop polarity measurement method | |
| CN104391256A (en) | Direct-current power supply looped network fault diagnosis device | |
| CN201681138U (en) | Lightweight type generator power-frequency alternating-current withstand voltage tester | |
| CN109633352A (en) | The method for checking three-phase or the secondary wiring of biphase current mutual inductor using single-phase alternating current | |
| CN104215867A (en) | Online recognition method for single-phase ground faults of low-voltage side of exciting transformer | |
| CN102411120B (en) | Earth line selection device for converting station direct current system | |
| CN112363090A (en) | Metering secondary circuit wiring test method | |
| CN103605041A (en) | Non-contact multi-point grounding detection method and system for secondary circuit of current transformer | |
| CN105403808B (en) | A kind of localization method and device of DC line earth fault | |
| CN104852355A (en) | Injection-type stator earth-fault protection method without being affected by generator winding | |
| CN202522634U (en) | Device for detecting capacity for withstanding direct-current magnetic biasing of transformer | |
| Hong et al. | Reliability improvement strategies for HVDC transmission system | |
| CN103616581A (en) | Method for testing reactive compensation device without dismounting leads | |
| CN108051699A (en) | A kind of secondary loop of mutual inductor of transformer substation exception live detection method and system | |
| CN204179639U (en) | Intelligent leakage circuit breaker |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190416 |
|
| WD01 | Invention patent application deemed withdrawn after publication |