CN110346647A - A kind of three-dimensional figure spectrum expression of wide area Opposed Current ratio - Google Patents
A kind of three-dimensional figure spectrum expression of wide area Opposed Current ratio Download PDFInfo
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- CN110346647A CN110346647A CN201910603923.9A CN201910603923A CN110346647A CN 110346647 A CN110346647 A CN 110346647A CN 201910603923 A CN201910603923 A CN 201910603923A CN 110346647 A CN110346647 A CN 110346647A
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- monitoring point
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- current ratio
- opposed current
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
- G01R27/2688—Measuring quality factor or dielectric loss, e.g. loss angle, or power factor
- G01R27/2694—Measuring dielectric loss, e.g. loss angle, loss factor or power factor
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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
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention discloses a kind of three-dimensional figure of wide area Opposed Current ratio to compose expression.The present invention, which is accomplished by, installs sensor, the synchronous current value over the ground obtained and record each monitoring point of each moment of wide area in different monitoring points；Based on the current value over the ground that sensor obtains, a specified wherein monitoring point is reference point IO, remaining each monitoring point is as monitoring point ID, calculate the Opposed Current ratio I of each monitoring point of each momentOR；The current value over the ground detected is synchronized by wide area calculates Opposed Current ratio, the Real-time Monitoring Data of Opposed Current ratio is showed with 3 D graphical interface mode, and judges that the state of insulation of high-tension apparatus changes by the fluctuating change of monitoring wide area Opposed Current ratio.Opposed Current of the present invention is form of straight lines than curve, is judged compared to by curve form, and form of straight lines can be more intuitive and clearly judges fluctuating change, to judge whether the state of insulation of equipment changes.
Description
Technical field
The invention belongs to atlas analysis to visualize field, and in particular to a kind of three-dimensional figure stave of wide area Opposed Current ratio reaches
Method.
Background technique
Currently, dielectric loss (calling " dielectric loss " in the following text) is to reflect one of the main method of dielectric insulation state, dielectric loss value becomes
Change can reflect its state of insulation to a certain extent.The variation that dielectric loss value can be generally judged by the fluctuation of Opposed Current ratio, from
And reflect the state of insulation variation of equipment.
The development of current information technology is increasingly extensive, and effect and status of the visualization technique in enterprise safety operation are aobvious
It obtains more and more important.But in visualization field, the expression way of Opposed Current ratio there is no relevant map expression, Bu Nengzhi
See the variation for clearly monitoring Opposed Current ratio and dielectric insulation state.
Summary of the invention
The purpose of the present invention is to the deficiencies in the prior art, provide a kind of three-dimensional figure stave of wide area Opposed Current ratio
Up to method.Concrete thought is as follows:
Sensor is installed in different monitoring points, wide area is synchronous obtain and record each monitoring point of each moment to earth-current
Value.Based on the current value over the ground that sensor obtains, a specified wherein monitoring point is reference point IO, remaining each monitoring point
As monitoring point ID, calculate the Opposed Current ratio I of each monitoring point of each momentOR。
The Opposed Current than for each monitoring point and datum mark synchronization electric current ratio (normalization).With IOFor ginseng
Benchmark is examined, remaining monitoring point IDIn synchronization and IORatio be normalized.Calculation are as follows:
IOR=(I(D,t)/I(O,t)-I(D,1)/I(O,1))/(I(D,1)/I(O,1)) (1)
The IORFor the Opposed Current of each monitoring point and datum mark ratio, I(D,t)For monitoring point IDIn the current value of t moment,
I(O,t)For reference point IOIn the current value of t moment, I(D,1)For monitoring point IDCurrent value for the first time, I(O,1)For reference point
IOCurrent value for the first time.
Therefore the current value over the ground detected can be synchronized by wide area calculates Opposed Current ratio, by the reality of Opposed Current ratio
When monitoring data showed with 3 D graphical interface mode, and the fluctuating change by monitoring wide area Opposed Current ratio is sentenced
The state of insulation variation of disconnected high-tension apparatus.
The specific steps of the method for the present invention are as follows:
Step (1) installs sensor as monitoring point on the end shield end of each capacitive bushing, and synchronous coupling is read
Take current value over the ground.One of monitoring point is chosen as reference point IO, remaining each monitoring point is as monitoring point ID；
Step (2) chooses the current value over the ground of each monitoring point of synchronization, to calculate Opposed Current ratio IOR, calculate
Method is IOR=(I(D,t)/I(O,t)-I(D,1)/I(O,1))/(I(D,1)/I(O,1))；
Step (3) defines the 3-D walls and floor of map, selects coordinate X-axis as time shaft t, is all monitoring points same
Moment reads the record moment of current value over the ground.Wherein, the resolution ratio of time scale can be selected according to demand, corresponding choosing
Select range include: the second, point, when, day, the moon, year.
It selects coordinate Y-axis as test point axis D, represents the position of each monitoring point and datum mark.Wherein, it needs to count display
Monitoring point and datum mark can all be selected according to demand.
Select coordinate Z axis as Opposed Current ratio IOR, each monitoring point and reference point are represented in the electric current of synchronization
Than (normalization), section setting range is (- 1~1).
The data of corresponding time point, monitoring point, Opposed Current ratio are mapped in three-dimensional coordinate by step (4), to draw
Wide area Opposed Current is produced than three-dimensional map.
Step (5) analyzes wide area Opposed Current than three-dimensional map, passes through Opposed Current ratio IORVariation judgement set
Standby state of insulation.If Opposed Current than constant, illustrates that the state of insulation of the monitoring point is good；If Opposed Current is than occurring wave
It is dynamic, illustrate that the state of insulation of the monitoring point may deteriorate.
Usefulness of the present invention:
The present invention calculates Opposed Current ratio based on the collected end shield earth current data of each sensor, wound
Newly wide area Opposed Current ratio is expressed with map mode, can wide area synchronously to Real-time Monitoring Data (including phase
Time point for answering, test point, Opposed Current ratio) it carries out 3 D graphical interface and shows and data analysis.Meanwhile interface expression way
It is very clear, it can effectively realize the state of insulation variation that high-tension apparatus is judged by the fluctuating change for monitoring Opposed Current ratio.
After normalized, Opposed Current is form of straight lines than curve, judges that form of straight lines can be more compared to by curve form
Add intuitive and clearly judge fluctuating change, to judge whether the state of insulation of equipment changes.
Detailed description of the invention
Fig. 1 is that map of the invention shows example.
Specific implementation
The present invention is described in detail below in conjunction with attached drawing, it is noted that described embodiment is only convenient for pair
Understanding of the invention, and do not play any restriction effect to it.
In practical application, for example last in each casing of the same phase difference test point of the our station three-phase and direct-connected station of same pressure side
Shield end coupling and read current value over the ground, a specified wherein monitoring point calculates each monitoring point of each moment as datum mark
Opposed Current ratio, and the variation by monitoring these Opposed Current ratios, to realize the monitoring function to state of insulation.
The specific steps of the method for the present invention are as follows:
Step (1) installs sensor as monitoring point on the end shield end of each capacitive bushing, chooses one of them
Monitoring point is as reference point IO, remaining each monitoring point is as monitoring point ID.Such as A0~A8 is remembered in monitoring point respectively, chooses prison
Measuring point A0 is as datum mark IO, remaining each monitoring point A1~A8 is as monitoring point ID。
Step (2) chooses each monitoring point of synchronization based on the synchronous end shield obtained of sensor over the ground current value
Current value over the ground, to calculate remaining each monitoring point A1~A8 in synchronization and reference point IOOpposed Current ratio,
Calculation method is IOR=(I(D,t)/I(O,t)-I(D,1)/I(O,1))/(I(D,1)/I(O,1))；
Step (3) defines the 3-D walls and floor of map, selects coordinate X-axis as time shaft t, for all monitoring point A0~A8
At the record moment of synchronization acquisition data.Wherein, the resolution ratio of time scale can be selected according to demand, corresponding choosing
Select range include: the second, point, when, day, the moon, year.For example, the time point of display is distinguished when current time scale resolution ratio is
Are as follows: 0,2,4,6,8,10,12.
It selects coordinate Y-axis as test point axis D, represents the position of each monitoring point and datum mark.Wherein, it needs to count display
Monitoring point and datum mark can all be selected according to demand.As shown in Figure 1, currently select statistics display datum mark for
A0, remaining monitoring point are A1~A8.
Select coordinate Z axis as Opposed Current ratio IOR, the electric current ratio for representing each monitoring point and datum mark in synchronization (returns
One changes), section setting range is (- 1~1).
The data of corresponding time point, test point, Opposed Current ratio are mapped in three-dimensional coordinate by step (4), to draw
Wide area Opposed Current is produced than three-dimensional map.
Step (5) analyzes wide area Opposed Current than three-dimensional map, passes through Opposed Current ratio IORVariation judgement set
The state of standby insulation.If the Opposed Current ratio I of monitoring pointORNumerical value invariant representation is normal, and data fluctuations indicate abnormal.
As shown in Figure 1, the electric current of monitoring point A5 is changed than curve, then the apparatus insulated state of monitoring point A5 is represented
Changed.
Claims (3)
1. a kind of three-dimensional figure of wide area Opposed Current ratio composes expression, it is characterised in that:
Sensor, the synchronous current value over the ground obtained and record each monitoring point of each moment of wide area are installed in different monitoring points；
Based on the current value over the ground that sensor obtains, a specified wherein monitoring point is reference point IO, remaining each monitoring point is made
For monitoring point ID, calculate the Opposed Current ratio I of each monitoring point of each momentOR；The electricity over the ground detected is synchronized by wide area
Flow valuve calculates Opposed Current ratio, and the Real-time Monitoring Data of Opposed Current ratio is showed with 3 D graphical interface mode,
And judge that the state of insulation of high-tension apparatus changes by the fluctuating change of monitoring wide area Opposed Current ratio.
2. a kind of three-dimensional figure of wide area Opposed Current ratio according to claim 1 composes expression, it is characterised in that including
Following steps:
Step (1) installs sensor as monitoring point on the end shield end of each capacitive bushing, and synchronizes coupling reading pair
Earth-current value；One of monitoring point is chosen as reference point IO, remaining each monitoring point is as monitoring point ID；
Step (2) chooses the current value over the ground of each monitoring point of synchronization, to calculate Opposed Current ratio IOR, calculation method
For IOR=(I(D,t)/I(O,t)-I(D,1)/I(O,1))/(I(D,1)/I(O,1))；
Step (3) defines the 3-D walls and floor of map；
It selects coordinate X-axis as time shaft t, reads the record moment of current value over the ground in synchronization for all monitoring points；
It selects coordinate Y-axis as test point axis D, represents the position of each monitoring point and datum mark；Wherein, need to count the prison of display
Measuring point and datum mark can all be selected according to demand；
Select coordinate Z axis as Opposed Current ratio IOR, each monitoring point and reference point are represented in the electric current ratio of synchronization, area
Between setting range be (- 1~1)；
The data of corresponding time point, monitoring point, Opposed Current ratio are mapped in three-dimensional coordinate by step (4), to draw out
Wide area Opposed Current is than three-dimensional map；
Step (5) analyzes Opposed Current than map, passes through Opposed Current ratio IORVariation judge the state of insulation of equipment；
If Opposed Current than constant, illustrates that the state of insulation of the monitoring point is good；If Opposed Current ratio fluctuates, illustrate the monitoring point
State of insulation may deteriorate.
3. a kind of three-dimensional figure of wide area Opposed Current ratio according to claim 2 composes expression, it is characterised in that described
Opposed Current than for each monitoring point and datum mark synchronization electric current ratio；With IOFor reference data, remaining monitoring point ID?
Synchronization and IORatio be normalized；Calculation are as follows:
IOR=(I(D,t)/I(O,t)-I(D,1)/I(O,1))/(I(D,1)/I(O,1)) (1)
The IORFor the Opposed Current of each monitoring point and datum mark ratio, I(D,t)For monitoring point IDIn the current value of t moment, I(O,t)
For reference point IOIn the current value of t moment, I(D,1)For monitoring point IDCurrent value for the first time, I(O,1)For reference point IO's
Current value for the first time.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113702692A (en) * | 2021-07-20 | 2021-11-26 | 中国电力科学研究院有限公司 | Method and device for synchronously monitoring current data of power distribution Internet of things |
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