CN109342988A - A kind of remanence of current transformer influence test method, apparatus and system - Google Patents
A kind of remanence of current transformer influence test method, apparatus and system Download PDFInfo
- Publication number
- CN109342988A CN109342988A CN201811564011.7A CN201811564011A CN109342988A CN 109342988 A CN109342988 A CN 109342988A CN 201811564011 A CN201811564011 A CN 201811564011A CN 109342988 A CN109342988 A CN 109342988A
- Authority
- CN
- China
- Prior art keywords
- current transformer
- test
- remanence
- test result
- magnetizer
- 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
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/02—Testing or calibrating of apparatus covered by the other groups of this subclass of auxiliary devices, e.g. of instrument transformers according to prescribed transformation ratio, phase angle, or wattage rating
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The present invention provides a kind of remanence of current transformer to influence test method, apparatus and system, comprising: determines current transformer to be measured, carries out elementary error test to current transformer, obtain the first test result；It magnetizes to current transformer；Elementary error test is carried out to the current transformer after magnetizing, obtains the second test result；Judge whether the difference for meeting the first test result and the second test result less than the first preset value and the second test result is less than the second preset value, if so, determine that current transformer is qualified, if not, it is determined that current transformer is unqualified.The present invention carries out elementary error test by the current transformer to front and back of magnetizing, then it is poor the experimental result obtained twice make, difference, second of test result will be compared with preset value, determine whether the remanent magnetism influence of current transformer is qualified, and can realize on current transformer automatic calibration line influences test function to the remanent magnetism of current transformer by the result of comparison.
Description
Technical field
The present invention relates to metering current mulual inductor field more particularly to a kind of remanence of current transformer influence test method and
Device, system.
Background technique
The fast development of China's electric utility, the usage amount of metering low-voltage current mutual inductor is synchronous to be risen, and causes provinces and cities
The workload substantial increase of grade measurement verification department, to keep the verifying work of mutual inductor more efficient, more acurrate, each grid company
Low-voltage current mutual inductor automatic calibration system is built up successively.
Currently, the low-voltage current mutual inductor automatic calibration system in operation has visual examination, dielectric(al) test, work
The functions such as frequency pressure test, magnetic saturation allowance test and secondary turn-to-turn pressure test, do not have low-voltage current mutual inductor remanent magnetism shadow
Ring test function.
However, power utilization environment is increasingly sophisticated as the usage amount of metering mutual inductor is increasing, the remanent magnetism shadow of mutual inductor
The problem of sound is also gradually taken seriously.Therefore, on low-voltage current mutual inductor automatic calibration line, a kind of current transformer is provided
Remanent magnetism, which influences test method, becomes those skilled in the art's technical problem urgently to be resolved.
Summary of the invention
The embodiment of the invention provides a kind of remanence of current transformer to influence test method, apparatus and system, is low tension
Current transformer automatic calibration line, which provides remanence of current transformer, influences test function.
According to an aspect of the present invention, a kind of remanence of current transformer influence test method is provided, comprising:
It determines current transformer to be measured, elementary error test is carried out to the current transformer, obtains the first test knot
Fruit；
It magnetizes to the current transformer；
The elementary error test is carried out to the current transformer after magnetizing, obtains the second test result；
Judge whether to meet the difference of first test result and second test result less than the first preset value and
Second test result is less than the second preset value, if so, determine that the current transformer is qualified, if not, it is determined that institute
It is unqualified to state current transformer.
Preferably, determination current transformer to be measured carries out elementary error test to the current transformer, obtains
The step of first test result specifically:
It determines current transformer to be measured, the elementary error under unloaded and full load condition is carried out to the current transformer
Test, obtains the first test result.
Preferably, described pair magnetize after the current transformer carry out the elementary error test, obtain the second test
As a result specifically:
Elementary error test under unloaded and full load condition is carried out to the current transformer after magnetizing, obtains second
Test result.
Preferably, described the step of magnetizing to the current transformer specifically:
It controls automatic connection and ripping device and is attached the current transformer with magnetizer, and by the Current Mutual Inductance
Device primary circuit open circuit controls the magnetizer and exports DC current to the current transformer, and completion controls institute after magnetizing
It states automatic connection and ripping device and disconnects the current transformer with magnetizer.
Preferably, the current transformer is attached by the automatic connection and ripping device of control with magnetizer, and will
The current transformer primary circuit open circuit, controls the magnetizer and exports DC current to the current transformer, complete
Automatic connection and ripping device is controlled after magnetizing disconnects the current transformer with magnetizer specifically:
It controls automatic connection and ripping device and is attached the current transformer with magnetizer, and by the Current Mutual Inductance
Device primary circuit open circuit controls the magnetizer and exports the rated secondary current preset percentage for accounting for the current transformer
DC current simultaneously continues preset time or more, completion magnetize after control automatic connection and ripping device by the current transformer with magnetize
Device disconnects.
Preferably, the preset percentage is 15%.
Preferably, the preset time is 2s.
Preferably, described to judge whether the difference for meeting first test result and second test result less than
One preset value and second test result are less than the second preset value, if so, determining that the current transformer is qualified, if not
It is, it is determined that the current transformer is unqualified further include:
The magnetizer is controlled to demagnetize to the current transformer.
According to another aspect of the present invention, a kind of remanence of current transformer influence test device is provided, comprising:
First tentative module carries out elementary error examination to the current transformer for determining current transformer to be measured
It tests, obtains the first test result；
Magnetize module, for magnetizing to the current transformer；
Second tentative module obtains for carrying out the elementary error test to the current transformer after magnetizing
Two test results；
Judgment module, for judging whether that the difference for meeting first test result and second test result is less than
First preset value and second test result are less than the second preset value, if so, determining that the current transformer is qualified, if not
It is, it is determined that the current transformer is unqualified.
According to another aspect of the present invention, a kind of remanence of current transformer influence test macro is provided, comprising: connect and tear open automatically
Line apparatus, magnetizer and remanence of current transformer as described above influence test device；
The remanence of current transformer influences to offer detecting current transformer station, the Current Mutual Inductance in test device
Device calibrating station is for installing current transformer to be measured；
It is logical with the automatic connection and ripping device, the magnetizer respectively that the remanence of current transformer influences test device
Letter connection, for controlling the working condition of the automatic connection and ripping device, magnetizer communication.
As can be seen from the above technical solutions, the embodiment of the present invention has the advantage that
The present invention provides a kind of remanence of current transformer to influence test method, apparatus and system, comprising: determines to be measured
Current transformer carries out elementary error test to current transformer, obtains the first test result；Current transformer is filled
Magnetic；Elementary error test is carried out to the current transformer after magnetizing, obtains the second test result；Judge whether to meet the first test
As a result with the difference of the second test result less than the first preset value and the second test result is less than the second preset value, if so, really
Constant current mutual inductor is qualified, if not, it is determined that current transformer is unqualified.The present invention passes through the Current Mutual Inductance to front and back of magnetizing
Device carries out elementary error test, and it is poor then make by the experimental result obtained twice, will by difference, second test result and
Preset value is compared, and determines whether the remanent magnetism influence of current transformer is qualified by the result of comparison, can be in Current Mutual Inductance
Realizing on device automatic calibration line influences test function to the remanent magnetism of current transformer.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without any creative labor, may be used also for those of ordinary skill in the art
To obtain other attached drawings according to these attached drawings.
Fig. 1 is the process signal of one embodiment that a kind of remanence of current transformer provided by the invention influences test method
Figure；
Fig. 2 is that the process for another embodiment that a kind of remanence of current transformer provided by the invention influences test method is shown
It is intended to；
Fig. 3 is the structural representation of one embodiment that a kind of remanence of current transformer provided by the invention influences test device
Figure.
Specific embodiment
The embodiment of the invention provides a kind of remanence of current transformer to influence test method, apparatus and system, is low tension
Current transformer automatic calibration line, which provides remanence of current transformer, influences test function.
In order to make the invention's purpose, features and advantages of the invention more obvious and easy to understand, below in conjunction with the present invention
Attached drawing in embodiment, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that disclosed below
Embodiment be only a part of the embodiment of the present invention, and not all embodiment.Based on the embodiments of the present invention, this field
Those of ordinary skill's all other embodiment obtained without making creative work, belongs to protection of the present invention
Range.
Please refer to Fig. 1, a kind of one embodiment of remanence of current transformer influence test method provided by the invention, packet
It includes:
101, it determines current transformer to be measured, elementary error test is carried out to current transformer, obtains the first test knot
Fruit；
102, it magnetizes to current transformer；
103, elementary error test is carried out to the current transformer after magnetizing, obtains the second test result；
104, judge whether the difference for meeting the first test result and the second test result less than the first preset value and second
Test result is less than the second preset value, if so, determine that current transformer is qualified, if not, it is determined that current transformer does not conform to
Lattice.
The present invention carries out elementary error test, the experiment that then will be obtained twice by the current transformer to front and back of magnetizing
As a result it is poor to carry out making, and difference, second of test result will be compared with preset value, and determine that electric current will be mutual by the result of comparison
Whether the remanent magnetism of sensor influences qualified, and the remanent magnetism shadow to current transformer can be realized on current transformer automatic calibration line
Ring test function.
The above are one embodiment that a kind of remanence of current transformer influences test method, to carry out more specific description,
A kind of another embodiment of remanence of current transformer influence test method is provided below, referring to Fig. 2, provided by the invention one
Kind remanence of current transformer influences another embodiment of test method, comprising:
201, it determines current transformer to be measured, the elementary error under unloaded and full load condition is carried out to current transformer
Test, obtains the first test result；
In the present embodiment, executing subject of the invention is that a kind of remanence of current transformer provided by the invention influences test
Device can be current transformer automatic verification system (terminal), inside be set with test procedure, can be realized pair
Current transformer is tested with the elementary error under light condition in a fully loaded state.The embodiment of the present invention is determining electric current to be measured
After mutual inductor, current transformer automatic verification system can carry out elementary error test to it, obtain the first test result.
202, it controls automatic connection and ripping device to be attached current transformer and magnetizer, and by current transformer one
Minor loop open circuit, control magnetizer export DC current to current transformer, and completion controls automatic connection and ripping device after magnetizing
Current transformer and magnetizer are disconnected；
Further, step 202 specifically: current transformer automatic verification system controls automatic connection and ripping device will be electric
Current transformer is attached with magnetizer, and current transformer primary circuit is opened a way, and is then controlled magnetizer output and is accounted for
The DC current of the rated secondary current preset percentage of current transformer simultaneously continues preset time or more, and completion controls after magnetizing
Automatic connection and ripping device disconnects current transformer and magnetizer.
Further, preset percentage is usually 15%, that is, the DC current exported is usually the volume of current transformer
Determine the 15% of secondary current (1A or 5A).
Further, preset time can be set to 2s.
Further, magnetizer can be/the instrument for measuring DC resistance that magnetizes, provide the DC current for magnetizing used and
Degaussing operation after the completion of test.
203, the elementary error under unloaded and full load condition is carried out to the current transformer after magnetizing to test, obtain second
Test result；
After the completion of current transformer magnetizes, then it is carried out again obtaining second such as the elementary error test in step 201
Test result.It is understood that test result is the measurement accuracy error of current transformer twice, front and back meeting of only magnetizing
The performance of current transformer is influenced, therefore typically, measurement result is different twice
204, judge whether the difference for meeting the first test result and the second test result less than the first preset value and second
Test result is less than the second preset value, if so, determine that current transformer is qualified, if not, it is determined that current transformer does not conform to
Lattice.
Compare test error twice as a result, if the difference (usually absolute value) of test error result is pre- less than first twice
Set value (the usually one third of the measurement accuracy error limit of the current transformer of national regulation requirement) and the second test knot
Fruit is less than the second preset value (the usually measurement accuracy error limit of the current transformer of national regulation requirement), if meeting two
Rule of judgment can then determine that current transformer is qualified, if can not meet two conditions simultaneously, can determine that electric current is mutual
Sensor is underproof.
205, control magnetizer demagnetizes to current transformer.
After the experiment has been completed, current transformer can have been connect with magnetizer again by automatic connection and ripping device
Come, then controls magnetizer and demagnetization operation is carried out to current transformer.
The present invention carries out elementary error test, the experiment that then will be obtained twice by the current transformer to front and back of magnetizing
As a result it is poor to carry out making, and difference, second of test result will be compared with preset value, and determine that electric current will be mutual by the result of comparison
Whether the remanent magnetism of sensor influences qualified, and the remanent magnetism shadow to current transformer can be realized on current transformer automatic calibration line
Ring test function.Further, remanent magnetism test of the present invention incorporates on the basis of automatic calibration line, can be automatically performed to connect and take out stitches
And remanent magnetism influence test is carried out, calibrating line is without artificial participation, while avoiding generating error because of artificial wiring, improves calibrating effect
Rate.
It is on a kind of detailed description that remanence of current transformer influence test method carries out provided by the invention, below above
The structure of test device will be influenced on a kind of remanence of current transformer provided by the invention and connection relationship is illustrated, please refer to
A kind of Fig. 3, one embodiment of remanence of current transformer influence test device provided by the invention, can be current transformer certainly
Dynamic verification system, comprising:
First tentative module 301 carries out elementary error examination to current transformer for determining current transformer to be measured
It tests, obtains the first test result；
The module that magnetizes 302, for magnetizing to current transformer；
Second tentative module 303 obtains the second test for carrying out elementary error test to the current transformer after magnetizing
As a result；
Judgment module 304, for judging whether the difference for meeting the first test result and the second test result less than first
Preset value and the second test result are less than the second preset value, if so, determine that current transformer is qualified, if not, it is determined that electricity
Current transformer is unqualified.
Further, the first tentative module 301 is also used to determine current transformer to be measured, carries out to current transformer
Elementary error test under unloaded and full load condition, obtains the first test result.
Further, the second tentative module 303 is also used to carry out unloaded and fully loaded current transformer after magnetizing
Elementary error test under state, obtains the second test result.
Further, the module that magnetizes 302 is also used to control automatic connection and ripping device for current transformer and magnetizer
It is attached, and current transformer primary circuit is opened a way, control magnetizer exports DC current to current transformer, completes
Automatic connection and ripping device is controlled after magnetizing to disconnect current transformer and magnetizer.
Further, the module that magnetizes 302 is also used to control automatic connection and ripping device for current transformer and magnetizer
It is attached, and current transformer primary circuit is opened a way, control magnetizer output accounts for the specified secondary electricity of current transformer
It flows the DC current of preset percentage and continues preset time or more, completion controls automatic connection and ripping device after magnetizing, and electric current is mutual
Sensor is disconnected with magnetizer.
Further, preset percentage 15%.
Further, preset time 2s.
Further, a kind of remanence of current transformer influence test device provided by the invention further includes
Demagnetization module, demagnetizes to current transformer for controlling magnetizer.
According to another aspect of the present invention, a kind of remanence of current transformer influence test macro is provided, comprising: connect and tear open automatically
Line apparatus, magnetizer and remanence of current transformer as described above influence test device；
Remanence of current transformer influences to offer detecting current transformer station, detecting current transformer work in test device
Position is for installing current transformer to be measured；
Remanence of current transformer influences test device and communicates to connect respectively with automatic connection and ripping device, magnetizer, is used for
Control the working condition of automatic connection and ripping device, magnetizer communication.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description,
The specific work process of device and unit, can refer to corresponding processes in the foregoing method embodiment, and details are not described herein.
In several embodiments provided herein, it should be understood that disclosed system, device and method can be with
It realizes by another way.For example, the apparatus embodiments described above are merely exemplary, for example, the unit
It divides, only a kind of logical function partition, there may be another division manner in actual implementation, such as multiple units or components
It can be combined or can be integrated into another system, or some features can be ignored or not executed.Another point, it is shown or
The mutual coupling, direct-coupling or communication connection discussed can be through some interfaces, the indirect coupling of device or unit
It closes or communicates to connect, can be electrical property, mechanical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
In network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme
's.
It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unit
It is that each unit physically exists alone, can also be integrated in one unit with two or more units.Above-mentioned integrated list
Member both can take the form of hardware realization, can also realize in the form of software functional units.
If the integrated unit is realized in the form of SFU software functional unit and sells or use as independent product
When, it can store in a computer readable storage medium.Based on this understanding, technical solution of the present invention is substantially
The all or part of the part that contributes to existing technology or the technical solution can be in the form of software products in other words
It embodies, which is stored in a storage medium, including some instructions are used so that a computer
Equipment (can be personal computer, server or the network equipment etc.) executes the complete of each embodiment the method for the present invention
Portion or part steps.And storage medium above-mentioned includes: USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only
Memory), random access memory (RAM, Random Access Memory), magnetic or disk etc. are various can store journey
The medium of sequence code.
The above, the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although referring to before
Stating embodiment, invention is explained in detail, those skilled in the art should understand that: it still can be to preceding
Technical solution documented by each embodiment is stated to modify or equivalent replacement of some of the technical features；And these
It modifies or replaces, the spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution.
Claims (10)
1. a kind of remanence of current transformer influences test method characterized by comprising
It determines current transformer to be measured, elementary error test is carried out to the current transformer, obtains the first test result；
It magnetizes to the current transformer；
The elementary error test is carried out to the current transformer after magnetizing, obtains the second test result；
Judge whether to meet the difference of first test result and second test result less than the first preset value and described
Second test result is less than the second preset value, if so, determine that the current transformer is qualified, if not, it is determined that the electricity
Current transformer is unqualified.
2. remanence of current transformer according to claim 1 influences test method, which is characterized in that the determination is to be measured
Current transformer, the step of carrying out elementary error test to the current transformer, obtain the first test result specifically:
It determines current transformer to be measured, the elementary error under unloaded and full load condition is carried out to the current transformer and is tried
It tests, obtains the first test result.
3. remanence of current transformer according to claim 2 influences test method, which is characterized in that after described pair magnetizes
The current transformer carries out the elementary error test, obtains the second test result specifically:
Elementary error test under unloaded and full load condition is carried out to the current transformer after magnetizing, obtains the second test
As a result.
4. remanence of current transformer according to claim 1 influences test method, which is characterized in that described to the electric current
The step of mutual inductor is magnetized specifically:
It controls automatic connection and ripping device and is attached the current transformer with magnetizer, and by the current transformer one
Minor loop is opened a way, and is controlled the magnetizer and is exported DC current to the current transformer, control is described certainly after completion is magnetized
Dynamic connection and ripping device disconnects the current transformer with magnetizer.
5. remanence of current transformer according to claim 4 influences test method, which is characterized in that the control connects automatically
The current transformer is attached by ripping device with magnetizer, and the current transformer primary circuit is opened a way, control
It makes the magnetizer and DC current is exported to the current transformer, completion controls automatic connection and ripping device after magnetizing will be described
Current transformer is disconnected with magnetizer specifically:
It controls automatic connection and ripping device and is attached the current transformer with magnetizer, and by the current transformer one
Minor loop open circuit controls the direct current that the magnetizer output accounts for the rated secondary current preset percentage of the current transformer
Electric current simultaneously continues preset time or more, and completion controls automatic connection and ripping device for the current transformer and magnetizer after magnetizing
It disconnects.
6. remanence of current transformer according to claim 5 influences test method, which is characterized in that the preset percentage
It is 15%.
7. remanence of current transformer according to claim 6 influences test method, which is characterized in that the preset time is
2s。
8. influencing test method to remanence of current transformer described in 7 any one according to claim 1, which is characterized in that institute
The difference for judging whether to meet first test result and second test result is stated less than the first preset value and described
Two test results are less than the second preset value, if so, determine that the current transformer is qualified, if not, it is determined that the electric current
Mutual inductor is unqualified further include:
The magnetizer is controlled to demagnetize to the current transformer.
9. a kind of remanence of current transformer influences test device characterized by comprising
First tentative module carries out elementary error test to the current transformer, obtains for determining current transformer to be measured
To the first test result；
Magnetize module, for magnetizing to the current transformer；
Second tentative module obtains the second examination for carrying out the elementary error test to the current transformer after magnetizing
Test result；
Judgment module, for judging whether the difference for meeting first test result and second test result less than first
Preset value and second test result are less than the second preset value, if so, determine that the current transformer is qualified, if it is not,
Then determine that the current transformer is unqualified.
10. a kind of remanence of current transformer influences test macro characterized by comprising automatic connection and ripping device, magnetizer
Test device is influenced with remanence of current transformer as claimed in claim 9；
The remanence of current transformer influences to offer detecting current transformer station in test device, the current transformer inspection
Station is determined for installing current transformer to be measured；
The remanence of current transformer influence test device respectively with the automatic connection and ripping device, the magnetizer communication link
It connects, for controlling the working condition of the automatic connection and ripping device, magnetizer communication.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811564011.7A CN109342988A (en) | 2018-12-20 | 2018-12-20 | A kind of remanence of current transformer influence test method, apparatus and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811564011.7A CN109342988A (en) | 2018-12-20 | 2018-12-20 | A kind of remanence of current transformer influence test method, apparatus and system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109342988A true CN109342988A (en) | 2019-02-15 |
Family
ID=65304337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811564011.7A Pending CN109342988A (en) | 2018-12-20 | 2018-12-20 | A kind of remanence of current transformer influence test method, apparatus and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109342988A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4217620A (en) * | 1978-02-06 | 1980-08-12 | Hydro-Quebec | Circuit for controlling induction in current transformers |
| US7348845B2 (en) * | 2005-05-19 | 2008-03-25 | Roberto Michele Giovannotto | System and method for employing variable magnetic flux bias in an amplifier |
| CN101592719A (en) * | 2009-06-30 | 2009-12-02 | 深圳市科陆电子科技股份有限公司 | Current transformer method of testing and system thereof |
| CN105044649A (en) * | 2015-08-28 | 2015-11-11 | 重庆拉姆达信息技术有限公司 | Current transformer error horizontal dynamic detection method and system |
| CN205594091U (en) * | 2016-03-24 | 2016-09-21 | 中国电力科学研究院 | Error measurement device for current transformer |
| CN105974348A (en) * | 2016-04-29 | 2016-09-28 | 国网山东省电力公司电力科学研究院 | Low-voltage current transformer integrated detection system and method thereof |
| CN106501749A (en) * | 2016-11-03 | 2017-03-15 | 国网山西省电力公司检修分公司 | A kind of CT transient characterisitics and actual remanent magnetism detecting system |
| CN108061872A (en) * | 2017-11-09 | 2018-05-22 | 国家电网公司 | The test method of remanent magnetism, device, storage medium and processor in current transformer |
| CN207396711U (en) * | 2017-11-09 | 2018-05-22 | 国家电网公司 | The hookup of remanent magnetism in current transformer |
-
2018
- 2018-12-20 CN CN201811564011.7A patent/CN109342988A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4217620A (en) * | 1978-02-06 | 1980-08-12 | Hydro-Quebec | Circuit for controlling induction in current transformers |
| US7348845B2 (en) * | 2005-05-19 | 2008-03-25 | Roberto Michele Giovannotto | System and method for employing variable magnetic flux bias in an amplifier |
| CN101592719A (en) * | 2009-06-30 | 2009-12-02 | 深圳市科陆电子科技股份有限公司 | Current transformer method of testing and system thereof |
| CN105044649A (en) * | 2015-08-28 | 2015-11-11 | 重庆拉姆达信息技术有限公司 | Current transformer error horizontal dynamic detection method and system |
| CN205594091U (en) * | 2016-03-24 | 2016-09-21 | 中国电力科学研究院 | Error measurement device for current transformer |
| CN105974348A (en) * | 2016-04-29 | 2016-09-28 | 国网山东省电力公司电力科学研究院 | Low-voltage current transformer integrated detection system and method thereof |
| CN106501749A (en) * | 2016-11-03 | 2017-03-15 | 国网山西省电力公司检修分公司 | A kind of CT transient characterisitics and actual remanent magnetism detecting system |
| CN108061872A (en) * | 2017-11-09 | 2018-05-22 | 国家电网公司 | The test method of remanent magnetism, device, storage medium and processor in current transformer |
| CN207396711U (en) * | 2017-11-09 | 2018-05-22 | 国家电网公司 | The hookup of remanent magnetism in current transformer |
Non-Patent Citations (1)
| Title |
|---|
| 中国电力企业联合会标准化中心: "《电力工业标准汇编 电气卷 2000》", 30 April 2002, 中国电力出版社 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| RU2633155C2 (en) | Method and device for testing transformer | |
| CN104833928B (en) | A kind of large-scale power transformer remanent magnetism detection method | |
| CN105182126B (en) | Improved distribution transformer energy efficiency metering detection method | |
| CN102540128A (en) | Method for automatically calibrating error of combined three-phase current transformer | |
| CN104730408B (en) | A kind of method for verifying high-power transformer differential circuit correctness | |
| CN102156227A (en) | Detecting system and detecting method for non-vehicular charging machine | |
| CN105842644B (en) | Electronic transformer error characteristic online comparison and calibration equipment and method | |
| CN104820143B (en) | The automatic testing method and system of distribution power automation terminal | |
| CN2932394Y (en) | Metering device with a wide current measuring range | |
| CN105954633A (en) | Method for detecting interturn fault of reactor through loss vector angle change and detection structure | |
| CN202886592U (en) | Virtual load device of single-phase electric energy meter | |
| CN202522634U (en) | Device for detecting capacity for withstanding direct-current magnetic biasing of transformer | |
| CN206945939U (en) | A kind of detection means of display device for short circuit | |
| CN103777171B (en) | A kind of method of testing of current transformer exciting characteristic curve | |
| CN204882853U (en) | Electric energy meter pressure resistance test installation | |
| CN105807143A (en) | Method for precisely measuring stray loss of structural components of transformers | |
| CN102866378B (en) | Voltage or current transformer on-line test device and voltage or current transformer on-line test method | |
| CN108061872A (en) | The test method of remanent magnetism, device, storage medium and processor in current transformer | |
| CN202886585U (en) | On-line test device for voltage/current transformer | |
| CN109342988A (en) | A kind of remanence of current transformer influence test method, apparatus and system | |
| CN109375047B (en) | System and method for testing double-end asynchronous polarity of high-voltage transmission line | |
| CN203287467U (en) | Transformation ratio and polarity testing apparatus for voltage transformer | |
| CN202362428U (en) | Detection device for electronic tripping device of low-voltage apparatus | |
| CN205941839U (en) | A constant current constant voltage discharge device for detecting rechargeable battery's check out test set | |
| CN205720637U (en) | A kind of check standard device for electric energy meter Withstand test device |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190215 |
|
| RJ01 | Rejection of invention patent application after publication |