CN106707125B - Oil-gas casing product shelf depreciation experimental method - Google Patents
Oil-gas casing product shelf depreciation experimental method Download PDFInfo
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- CN106707125B CN106707125B CN201710004980.6A CN201710004980A CN106707125B CN 106707125 B CN106707125 B CN 106707125B CN 201710004980 A CN201710004980 A CN 201710004980A CN 106707125 B CN106707125 B CN 106707125B
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- high pressure
- phase
- oil
- gas casing
- neutral point
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- 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
- G01R31/1263—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 of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1281—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 of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of liquids or gases
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The invention discloses a kind of oil-gas casing product shelf depreciation experimental methods, it is related to test method technical field, when test, in the cold situation of low-pressure section, the square wave of identical parameters is injected before and after the corresponding phase of low pressure is connected with high pressure neutral point respectively, and using instrument for measuring partial discharge to the oil-gas casing end shield electric discharge amount of high pressure phase, attenuation rate is calculated by the electric discharge magnitude of front and back twi-read, then to low-pressure section indirect current under low pressure and high pressure neutral point connection status, use the discharge capacity of instrument for measuring partial discharge's testing high voltage phase oil-gas casing end shield again, and the true discharge capacity of high pressure phase is finally converted into conjunction with attenuation rate, pass through such method, it no longer needs that temporary casing is installed during the test, testing procedure is simplified, improve testing efficiency.
Description
Technical field
The present invention relates to test method technical fields, more particularly to a kind of oil-gas casing product shelf depreciation experiment side
Method.
Background technique
Shelf depreciation experiment is one kind of transformer routine test, and the meaning of shelf depreciation and the purpose of test are as follows:
1) shelf depreciation refers to that the dielectric in High-Voltage Electrical Appliances under high electric-field intensity effect, occurs between the electrodes
Not perforative electric discharge.
2) purpose of partial discharge test is the defect of discovering device structure and manufacturing process.Such as: insulating inner part
Electric field strength is excessively high；Metal parts has wedge angle；Insulation be mixed into impurity or partially with faulty goods interior metal grounded parts it
Between, be electrically connected bad etc. between electric conductor, to eliminate these defects, prevent shelf depreciation from damaging to insulation.
Transformer with oil-gas casing is when erecting bed carries out partial discharge test, it is necessary to install temporary casing, adopt
It is drawn with temporary casing, oil-gas casing can just be installed by needing to remove experimental rig after test.Such method and step operation
It is cumbersome, influence the efficiency tested and installed.
Summary of the invention
The technical problem to be solved by the present invention is in view of the above shortcomings of the prior art, provide a kind of oil-gas casing product office
Portion's discharge test method solves the problems, such as that test operating procedure is cumbersome, testing efficiency is low, test effect simple with operating procedure
The high feature of rate.
In order to solve the above technical problems, the technical solution used in the present invention is: a kind of oil-gas casing product shelf depreciation
Experimental method includes the following steps that (by taking testing high voltage C phase discharge amount as an example, remaining high pressure A phase and high pressure B phase are tested and tested
The step of high pressure C phase discharge amount, is identical):
1) transformer low voltage c phase and high pressure neutral point are not connected to, instrument for measuring partial discharge and high pressure C phase oil-gas casing end shield
Connection, square-wave generator are connected with high pressure neutral point；
2) square-wave generator injects square wave to high pressure neutral point, opens instrument for measuring partial discharge, acquires high pressure C phase oil gas set
The discharge capacity of pipe end shield, and reading numerical values 1；
3) low pressure c phase and high pressure neutral point are attached；
4) square-wave generator injects square wave identical with parameter in step 2) to high pressure neutral point；
5) instrument for measuring partial discharge is acquired high pressure C phase oil-gas casing end shield discharge capacity, and reading numerical values 2；
6) high pressure C phase is calculated in low pressure c phase and high pressure by the discharge capacity of twi-read high pressure C phase oil-gas casing end shield
The electric discharge attenuation rate of neutral point connection front and back；
7) low pressure c phase is passed through alternating current, reads high pressure C phase oil-gas casing end shield discharge capacity；
8) attenuation rate passed through in the high pressure C phase oil-gas casing end shield discharge capacity and step 6) measured in step 7) calculates
The true discharge capacity of high pressure C phase.
Preferably, the electricity of square-wave generator transmitting square wave and frequency are adjustable.
Preferably, the lead-out wire of transformer low voltage a, b, c three-phase and high pressure neutral point is drawn with common insulating sleeve.
Preferably, transformer high-voltage A, B, C three-phase lead-out wire is drawn with oil-gas casing.
Preferably, the measurement premise in step 1)-step 6) is low-pressure section no power.
Preferably, the model TWPD-02 of square-wave generator, has discharge capacity and Frequency Adjustment Function.
Preferably, the model TWPD-2E of instrument for measuring partial discharge, has four-way while acquiring function.
The beneficial effects of adopting the technical scheme are that the present invention is locally put by designing oil-gas casing product
Electric experimental method directly can carry out shelf depreciation test to the transformer with oil-gas casing, not need using interim set
Pipe draws high pressure phase, eliminates the installation of temporary casing and removes process, and the process for simplifying test improves test effect
Rate.
Detailed description of the invention
Fig. 1 is work-based logic flow chart of the invention.
Specific embodiment
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
As shown in Figure 1, for a kind of work-based logic flow chart of oil-gas casing product shelf depreciation experimental method of the present invention, packet
Including following steps, (by taking testing high voltage C phase discharge amount as an example, remaining high pressure A phase and high pressure B phase are tested and testing high voltage C phase discharge
The step of amount, is identical):
1) transformer low voltage c phase and high pressure neutral point are not connected to, instrument for measuring partial discharge and high pressure C phase oil-gas casing end shield
Connection, square-wave generator are connected with high pressure neutral point；
2) square-wave generator injects square wave to high pressure neutral point, opens instrument for measuring partial discharge, acquires high pressure C phase oil gas set
The discharge capacity of pipe end shield, and reading numerical values；
3) low pressure c phase and high pressure neutral point are attached；
4) square-wave generator injects square wave identical with parameter in step 2) to high pressure neutral point；
5) instrument for measuring partial discharge is acquired high pressure C phase oil-gas casing end shield discharge capacity, and reading numerical values；
6) the electric discharge attenuation rate of high pressure C phase is calculated by the discharge capacity of twi-read high pressure C phase oil-gas casing end shield；
7) low pressure c phase is passed through alternating current, reads high pressure C phase oil-gas casing end shield discharge capacity；
8) attenuation rate passed through in the high pressure C phase oil-gas casing end shield discharge capacity and step 6) measured in step 7) calculates
The true discharge capacity of high pressure C phase.
The electricity and frequency of square-wave generator transmitting square wave are adjustable, according to the needs of actual conditions, can change to high pressure
The electricity and frequency of neutral point injection square wave.
The lead-out wire of transformer low voltage a, b, c three-phase and high pressure neutral point is drawn with common insulating sleeve, both can satisfy
Insulation performance, while material is saved, reduce cost.
Transformer high-voltage A, B, C three-phase lead-out wire is drawn with oil-gas casing.
Measurement premise in step 1)-step 6) is low-pressure section no power.
The model TWPD-02 of square-wave generator, has discharge capacity and Frequency Adjustment Function.
The model TWPD-2E of instrument for measuring partial discharge, has four-way while acquiring function.
After adopting the above technical scheme, in the cold situation of low-pressure section, respectively in the corresponding phase of low pressure and high pressure
Property point connection front and back injection identical parameters square wave, and the oil-gas casing end shield of high pressure phase is tested using instrument for measuring partial discharge
Discharge capacity calculates attenuation rate by the electric discharge magnitude that front and rear sides are read, then to low-pressure section indirect current, uses part
The discharge capacity of discharge tester testing high voltage phase oil-gas casing end shield again, and the true of high pressure phase is finally converted into conjunction with attenuation rate
Real discharge capacity is no longer needed to install temporary casing during the test, has simplified testing procedure, improved by such method
Testing efficiency.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (6)
1. a kind of oil-gas casing product shelf depreciation experimental method, it is characterised in that: include the following steps, with testing high voltage C phase
For discharge capacity, the step of remaining high pressure A phase and high pressure B phase are tested with testing high voltage C phase discharge amount, is identical:
1) transformer low voltage c phase and high pressure neutral point are not connected to, and instrument for measuring partial discharge and high pressure C phase oil-gas casing end shield connect
It connects, square-wave generator is connected with high pressure neutral point；
2) square-wave generator injects square wave to high pressure neutral point, opens instrument for measuring partial discharge, acquisition high pressure C phase oil-gas casing end
The discharge capacity of screen, and reading numerical values 1；
3) low pressure c phase and high pressure neutral point are attached；
4) square-wave generator injects square wave identical with parameter in step 2) to high pressure neutral point；
5) instrument for measuring partial discharge is acquired high pressure C phase oil-gas casing end shield discharge capacity, and reading numerical values 2；
6) high pressure C phase is calculated in low pressure c by the electric discharge numerical quantity 1 of twi-read high pressure C phase oil-gas casing end shield and numerical value 2
The electric discharge attenuation rate of front and back is connect with high pressure neutral point；
7) low pressure c phase is passed through alternating current, reads high pressure C phase oil-gas casing end shield discharge capacity；
8) attenuation rate passed through in the high pressure C phase oil-gas casing end shield discharge capacity and step 6) measured in step 7) calculates high pressure
The true discharge capacity of C phase；
Measurement premise in the step 1)-step 6) is low-pressure section no power.
2. oil-gas casing product shelf depreciation experimental method according to claim 1, it is characterised in that: the square wave occurs
The electricity and frequency of device transmitting square wave are adjustable.
3. oil-gas casing product shelf depreciation experimental method according to claim 1, it is characterised in that: the transformer is low
The lead-out wire of pressure a, b, c three-phase and high pressure neutral point is drawn with common insulating sleeve.
4. oil-gas casing product shelf depreciation experimental method according to claim 1, it is characterised in that: the transformer is high
Pressure A, B, C three-phase lead-out wire is drawn with oil-gas casing.
5. oil-gas casing product shelf depreciation experimental method according to claim 1, it is characterised in that: the square wave occurs
The model TWPD-02 of device.
6. oil-gas casing product shelf depreciation experimental method according to claim 1, it is characterised in that: the shelf depreciation
The model TWPD-2E of tester.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710004980.6A CN106707125B (en) | 2017-01-04 | 2017-01-04 | Oil-gas casing product shelf depreciation experimental method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710004980.6A CN106707125B (en) | 2017-01-04 | 2017-01-04 | Oil-gas casing product shelf depreciation experimental method |
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| CN106707125A CN106707125A (en) | 2017-05-24 |
| CN106707125B true CN106707125B (en) | 2019-05-28 |
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| CN201710004980.6A Active CN106707125B (en) | 2017-01-04 | 2017-01-04 | Oil-gas casing product shelf depreciation experimental method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110542838B (en) * | 2019-08-14 | 2024-01-16 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Casing core destructive testing system and method for capacitive screen |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19515067C1 (en) * | 1995-04-28 | 1997-02-27 | Lemke Eberhard Prof Dr Ing Hab | High voltage cable with arrangement for determining partial discharge to cable connection points |
| CN104062526A (en) * | 2014-06-30 | 2014-09-24 | 国家电网公司 | Oil-oil bushing cable outlet transformer test method without head removing |
| CN204925278U (en) * | 2015-08-21 | 2015-12-30 | 华北电力大学 | Multi -functional transformer bushing on -line monitoring sensor |
| CN106199349B (en) * | 2016-06-21 | 2019-02-22 | 国网天津市电力公司 | Partial discharge of transformer region decision method based on calibration square-wave signal transmitting ratio |
| CN207801321U (en) * | 2017-12-23 | 2018-08-31 | 中国西电电气股份有限公司 | A kind of connection structure of dry sleeve and GIS |
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