CN110007191A - A kind of machine winding coil insulation fault location method - Google Patents
A kind of machine winding coil insulation fault location method Download PDFInfo
- Publication number
- CN110007191A CN110007191A CN201910292993.7A CN201910292993A CN110007191A CN 110007191 A CN110007191 A CN 110007191A CN 201910292993 A CN201910292993 A CN 201910292993A CN 110007191 A CN110007191 A CN 110007191A
- Authority
- CN
- China
- Prior art keywords
- point
- winding coil
- machine winding
- insulation fault
- location method
- 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.)
- Withdrawn
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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
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
-
- 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
-
- 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
- G01R31/72—Testing of electric windings
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention belongs to field of power systems, are related to a kind of machine winding coil insulation fault location method.Present invention utilizes the electric resistance partial pressure principles of conducting wire, apply a stable DC stream to the circuit that ground fault occurs, and can calculate the specific location of fault point by measuring each site voltage value；Operation of the present invention is easy, does not need special instrument and equipment, calculates simply, and precision is higher, convenient and efficient for practical operation, has very strong practicability.
Description
Technical field
The invention belongs to field of power systems, are related to a kind of machine winding coil insulation fault location method.
Background technique
Since the capacity of medium-and-large-sized motor is big, the voltage of coil windings carrying is high, electric current is big, stress is strong, thus motor around
Group is equipped with special technique requirement；Coil insulation fault is one of major failure form of electrical fault, works as motor
Insulation fault occurs for winding coil, and staff requires a great deal of time trouble-shooting point, waste a large amount of time and
Manpower.
Summary of the invention
In order to solve the problems in the prior art, the purpose of the present invention is to provide a kind of machine winding coil insulation fault location
Method.
A kind of machine winding coil insulation fault location method, comprising the following steps:
(1) setting machine winding coil both ends are respectively A point and B point, set the insulation fault point on machine winding coil
For C point, apply stable DC stream to machine winding coil, measures the voltage value U ac between A point and motor housing, measurement
Voltage value U bc between B point and motor housing measures the distance between machine winding coil A point and B point L ab；
(2) L ab, U ac and Ubc are brought into following formula, obtain A point of the insulation fault point C with respect to machine winding coil
Distance L ac,
L ac=L ab*U ac/ (U ac+U cb)
(3) the A point distance L ac according to insulation fault point C with respect to machine winding coil, measures on machine winding coil
The position of insulation fault point C out.
The invention has the following advantages:
Present invention utilizes the electric resistance partial pressure principles of conducting wire, apply a stable DC to the circuit that ground fault occurs
Stream can calculate the specific location of fault point by measuring each site voltage value；
Operation of the present invention is easy, does not need special instrument and equipment, calculates simply, and precision is higher, for being difficult to dismount
The winding earth failure of medium-and-large-sized favourable turn can be rapidly performed by positioning, practical operation is convenient and efficient, has very strong practical
Property.
Detailed description of the invention
Fig. 1 is detection principle diagram of the invention.
Specific embodiment
Setting machine winding coil both ends are respectively A point and B point as shown in Figure 1, set the insulation on machine winding coil
Fault point is C point, applies stable DC stream to machine winding coil, measures the voltage value U between A point and motor housing
Ac measures the voltage value U bc between B point and motor housing, measures the distance between machine winding coil A point and B point L ab,
L ab, U ac and Ubc are brought into L ac=L ab*U ac/ (U ac+U cb) and calculated, obtains insulation fault point C with respect to motor
The A point distance L ac of winding coil, the A point distance L ac according to insulation fault point C with respect to machine winding coil, in machine winding
The position of insulation fault point C is measured on coil.
Claims (1)
1. a kind of machine winding coil insulation fault location method, which comprises the following steps:
(1) setting machine winding coil both ends are respectively A point and B point, set the insulation fault point on machine winding coil as C
Point applies stable DC stream to machine winding coil, measures the voltage value U ac between A point and motor housing, measures B point
Voltage value U bc between motor housing measures the distance between machine winding coil A point and B point L ab；(2) by L ab, U
Ac and Ubc are brought into following formula, obtain A point distance L ac of the insulation fault point C with respect to machine winding coil,
L ac=L ab*U ac/ (U ac+U cb)
(3) the A point distance L ac according to insulation fault point C with respect to machine winding coil is measured absolutely on machine winding coil
The position of edge fault point C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910292993.7A CN110007191A (en) | 2019-04-12 | 2019-04-12 | A kind of machine winding coil insulation fault location method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910292993.7A CN110007191A (en) | 2019-04-12 | 2019-04-12 | A kind of machine winding coil insulation fault location method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110007191A true CN110007191A (en) | 2019-07-12 |
Family
ID=67171352
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910292993.7A Withdrawn CN110007191A (en) | 2019-04-12 | 2019-04-12 | A kind of machine winding coil insulation fault location method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110007191A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110888084A (en) * | 2019-11-27 | 2020-03-17 | 天威保变（秦皇岛）变压器有限公司 | Method for measuring short-circuit point of winding coil of large transformer |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002345192A (en) * | 2001-05-14 | 2002-11-29 | Hitachi Ltd | Stator of high-voltage dynamo-electric machine, its diagnosis method and dynamo-electric machine |
| CN1454319A (en) * | 2000-04-20 | 2003-11-05 | 通用电气公司 | Insulation tester for squirrel cage rotors |
| CN102721903A (en) * | 2012-05-08 | 2012-10-10 | 河北省电力研究院 | Device and method for detecting turn-to-turn insulation failure of rotor winding of generator |
| CN103762800A (en) * | 2013-12-31 | 2014-04-30 | 中船重工电机科技股份有限公司 | Tool for verifying insulation of stator coil of motor |
| CN105223477A (en) * | 2015-09-25 | 2016-01-06 | 酒泉钢铁(集团)有限责任公司 | A kind of machine winding coil insulation fault location method |
-
2019
- 2019-04-12 CN CN201910292993.7A patent/CN110007191A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1454319A (en) * | 2000-04-20 | 2003-11-05 | 通用电气公司 | Insulation tester for squirrel cage rotors |
| JP2002345192A (en) * | 2001-05-14 | 2002-11-29 | Hitachi Ltd | Stator of high-voltage dynamo-electric machine, its diagnosis method and dynamo-electric machine |
| CN102721903A (en) * | 2012-05-08 | 2012-10-10 | 河北省电力研究院 | Device and method for detecting turn-to-turn insulation failure of rotor winding of generator |
| CN103762800A (en) * | 2013-12-31 | 2014-04-30 | 中船重工电机科技股份有限公司 | Tool for verifying insulation of stator coil of motor |
| CN105223477A (en) * | 2015-09-25 | 2016-01-06 | 酒泉钢铁(集团)有限责任公司 | A kind of machine winding coil insulation fault location method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110888084A (en) * | 2019-11-27 | 2020-03-17 | 天威保变（秦皇岛）变压器有限公司 | Method for measuring short-circuit point of winding coil of large transformer |
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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 | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20190712 |