CN109270482A - Voltage transformer accuracy of measuring on-line evaluation method and terminal device - Google Patents
Voltage transformer accuracy of measuring on-line evaluation method and terminal device Download PDFInfo
- Publication number
- CN109270482A CN109270482A CN201811359150.6A CN201811359150A CN109270482A CN 109270482 A CN109270482 A CN 109270482A CN 201811359150 A CN201811359150 A CN 201811359150A CN 109270482 A CN109270482 A CN 109270482A
- Authority
- CN
- China
- Prior art keywords
- voltage transformer
- accuracy
- measuring
- critical point
- point data
- 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.)
- Granted
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 Relating To Insulation (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The present invention is suitable for Electric Energy Metering Technology field, provides a kind of voltage transformer accuracy of measuring on-line evaluation method and terminal device.The described method includes: obtaining the critical point data of data collection system acquisition, obtain the standard critical point data of compbined test management platform storage, determine the parameter variation tendency of the capacitance of voltage transformer, dielectric loss and corresponding line loss according to critical point data and standard critical point data, and according to capacitance, the parameter variation tendency of dielectric loss and corresponding line loss determine the accuracy of measuring of voltage transformer.After adopting the above scheme, while improving energy metering operation management level and reliability, on-line condition monitoring, fault diagnosis and the status assessment of entire metering gateway device are realized in extension, are assessed for the state-detection of energy metering, intelligent diagnostics and are provided strong support.
Description
Technical field
The invention belongs to Electric Energy Metering Technology field more particularly to a kind of voltage transformer accuracy of measuring on-line evaluation sides
Method and terminal device.
Background technique
Currently, using cycle detection mode for all kinds of metering devices according to the regulation of electric energy metering device vertification regulation
It tests, but metering device failure can all occur every year or overproof etc. ask for energy metering device in practical hair power supply trade settlement
Topic, one of key factor are exactly the failure of capacitance type potential transformer and overproof.
CVT (Continuously Variable is widely used with voltage transformer in the measurement of 35kV and above
Transmission, capacitance type potential transformer), for this style of voltage transformer compares electromagnetic transformer, error
Stability is not high, off-gage phenomenon easily occurs, and in detection cycle without effective means to all kinds of metering device error changes into
Row monitoring, voltage transformer round of visits internal fault or it is overproof become influence the accuracy of measuring a most important factor, and
Since its physical characteristic expands error electricity constantly, the fair and accurate of electricity transaction is influenced, seriously
Situation even can threaten electric power netting safe running.
Summary of the invention
In view of this, the embodiment of the invention provides a kind of voltage transformer accuracy of measuring on-line evaluation method and terminals
Equipment, to solve to influence electricity in the prior art since CVT physical characteristic expands error electricity constantly
The justice of transaction and the problem of accurate, serious conditions even can threaten electric power netting safe running.
The first aspect of the embodiment of the present invention provides a kind of voltage transformer accuracy of measuring on-line evaluation method, packet
It includes:
Obtain the critical point data of data collection system acquisition；
Obtain the standard critical point data of compbined test management platform storage；
The parameter of the capacitance of voltage transformer, dielectric loss and corresponding line loss is determined according to critical point data and standard critical point data
Variation tendency, and according to capacitance, the parameter variation tendency of dielectric loss and corresponding line loss determine the accurate measurement of voltage transformer
Degree.
As further technical solution, the method also includes:
The line loss per unit expression formula of line loss between the metering critical point of voltage transformer and reference point are as follows:
R'=r-f1+f2, wherein r' is that acquisition system shows line loss per unit, and r is route practical line loss rate, f1For stoichiometric point with
Voltage transformer ratio is poor, f2It is poor for reference point and voltage transformer ratio.
As further technical solution, the voltage transformer includes capacitance partial pressure unit and electromagnetic unit, the electricity
Hold the full film medium that partial pressure unit includes film paper complex media or parallel connection in parallel.
As further technical solution, influence of the insulation system of the voltage transformer to metering performance includes interior exhausted
Edge performance, external insulation performance and ageing properties.
As further technical solution, the method also includes:
Judge whether the accuracy of measuring of voltage transformer is qualified according to the accuracy judgment criteria prestored；
If it is determined that the accuracy of measuring of voltage transformer is unqualified, alarm command is sent to warning device, the alarm refers to
Order is used to indicate the warning device alarm.
The second aspect of the embodiment of the present invention provides a kind of voltage transformer accuracy of measuring on-line evaluation device, packet
It includes:
Critical point data acquisition module, for obtaining the critical point data of data collection system acquisition；
Standard critical point data acquisition module, for obtaining the standard critical point data of compbined test management platform storage；
Accuracy of measuring determining module, for determining the capacitor of voltage transformer according to critical point data and standard critical point data
The parameter variation tendency of amount, dielectric loss and corresponding line loss, and according to the parameter of the capacitance of voltage transformer, dielectric loss and corresponding line loss
Variation tendency determines the accuracy of measuring of voltage transformer.
As further technical solution, described device further include:
Line loss per unit determining module, the line loss per unit table for line loss between the metering critical point of voltage transformer and reference point
Up to formula are as follows:
R'=r-f1+f2, wherein r' is that acquisition system shows line loss per unit, and r is route practical line loss rate, f1For stoichiometric point with
Voltage transformer ratio is poor, f2It is poor for reference point and voltage transformer ratio.
As further technical solution, the voltage transformer includes capacitance partial pressure unit and electromagnetic unit, the electricity
Hold the full film medium that partial pressure unit includes film paper complex media or parallel connection in parallel.
The third aspect of the embodiment of the present invention provides a kind of voltage transformer accuracy of measuring on-line evaluation terminal device,
Including memory, processor and store the computer program that can be run in the memory and on the processor, institute
State the method realized as described in above-mentioned first aspect when processor executes the computer program.
The fourth aspect of the embodiment of the present invention provides a kind of computer readable storage medium, the computer-readable storage
Media storage has computer program, and the side as described in above-mentioned first aspect is realized when the computer program is executed by processor
Method.
Existing beneficial effect is the embodiment of the present invention compared with prior art: after adopting the above scheme, can be according to critical point
Data and standard critical point data determine the parameter variation tendency of the capacitance of voltage transformer, dielectric loss and corresponding line loss, and according to
Capacitance, the parameter variation tendency of dielectric loss and corresponding line loss determine the accuracy of measuring of voltage transformer, improve critical point meter
While measuring operation management level and reliability, the entire metering gateway device of extension realization (including electric energy meter, Current Voltage mutual inductance
Device) on-line condition monitoring, fault diagnosis and status assessment, assess and provide for the state-detection of energy metering, intelligent diagnostics
Strong support.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only of the invention some
Embodiment for those of ordinary skill in the art without any creative labor, can also be according to these
Attached drawing obtains other attached drawings.
Fig. 1 is a kind of step process of voltage transformer accuracy of measuring on-line evaluation method provided in an embodiment of the present invention
Figure；
Fig. 2 be another embodiment of the present invention provides a kind of voltage transformer accuracy of measuring on-line evaluation method the step of
Flow chart；
Fig. 3 is a kind of structural representation of voltage transformer accuracy of measuring on-line evaluation device provided in an embodiment of the present invention
Figure；
Fig. 4 is a kind of signal of voltage transformer accuracy of measuring on-line evaluation terminal device provided in an embodiment of the present invention
Figure；
Fig. 5 is system configuration connection schematic diagram provided in an embodiment of the present invention；
Fig. 6 is that voltage transformer provided in an embodiment of the present invention is electrically connected schematic diagram substantially；
Fig. 7 is voltage transformer insulation electrical connection schematic diagram provided in an embodiment of the present invention；
Fig. 8 be another embodiment of the present invention provides voltage transformer insulation electrical connection schematic diagram；
Fig. 9 is voltage transformer insulation electrical connection schematic diagram provided in an embodiment of the present invention.
Specific embodiment
In being described below, for illustration and not for limitation, the tool of such as particular system structure, technology etc is proposed
Body details, to understand thoroughly the embodiment of the present invention.However, it will be clear to one skilled in the art that there is no these specific
The present invention also may be implemented in the other embodiments of details.In other situations, it omits to well-known system, device, electricity
The detailed description of road and method, in case unnecessary details interferes description of the invention.
In order to illustrate technical solutions according to the invention, the following is a description of specific embodiments.
As shown in Figure 1, being a kind of voltage transformer accuracy of measuring on-line evaluation method provided in an embodiment of the present invention
Flow chart of steps, comprising:
Step S101 obtains the critical point data of data collection system acquisition.
Step S102 obtains the standard critical point data of compbined test management platform storage.
Step S103 determines the capacitance of voltage transformer, dielectric loss and corresponding according to critical point data and standard critical point data
The parameter variation tendency of line loss, and according to capacitance, the parameter variation tendency of dielectric loss and corresponding line loss determine voltage transformer
The accuracy of measuring.
Specifically, this programme is analyzed suitable for energy metering capacitance type potential transformer accuracy of measuring associated arguments, into
And to realizing that remote online evaluates early warning in fortune CVT accuracy variation operating condition, it replaces being difficult to promote realization to evaluate early warning mechanism
Online real-time inspection mode, establish 10 kinds or more internal and external factor parameters and meter characteristic variation relation model, being formed abundant has
The hind computation model library of power, system obtain real time data and test data automatically, automatically analyze composition error, and provide standard
Under the conditions of actual error evaluation of estimate, evaluate CVT comprehensive state, provide different brackets alarm to abnormal, automatically generate and produced under line
Plan.While so that this assessment system is reached promotion energy metering operation management level and reliability, entire metering is realized in extension
Gateway device includes electric energy meter, the on-line condition monitoring of current-voltage transformer, fault diagnosis and status assessment, is energy metering
State-detection, intelligent diagnostics assessment provide strong support.
In addition, as shown in figure 5, in a specific example, the method also includes:
The line loss per unit expression formula of line loss between the metering critical point of voltage transformer and reference point are as follows:
R'=r-f1+f2, wherein r' is that acquisition system shows line loss per unit, and r is route practical line loss rate, f1For stoichiometric point with
Voltage transformer ratio is poor, f2It is poor for reference point and voltage transformer ratio.
Specifically, in addition, in a specific example, for system configuration, according to DL/T 448-2016 " electric energy meter
Measure device technique rule of management ", the property right boundary of power supply facilities should be arranged in the electric energy metering device of trade settlement in principle
The other end at place, interconnector and special line power supply circuit between electricity power enterprise's online route, power grid enterprises should configure examination electricity consumption
Energy metering device measures line loss between critical point and reference point and is in general fixed and invariable, determined by its line parameter circuit value.
But when the accuracy of measuring changes, acquisition system back-end data, which calculates gained line loss per unit, can generate corresponding change.
In addition, the voltage transformer includes capacitance partial pressure unit and electromagnetic unit, the electricity in a specific example
Hold the full film medium that partial pressure unit includes film paper complex media or parallel connection in parallel, basic electrical schematic diagram is as shown in Figure 6.
In addition, influence of the insulation system of the voltage transformer to metering performance includes interior in a specific example
Insulation performance, external insulation performance and ageing properties.
In addition, as shown in Figure 7, Figure 8 and Figure 9, in a specific example, shadow of the CVT insulation system to its metering performance
The influence for mainly needing to consider interior insulation, external insulation and aging, temperature and humidity is rung, leakage current, stray electrical are introduced to device model
The influence of the parameters such as appearance, industrial frequency electric resistance, wherein Zm is excitation impedance, and Zd is damped impedance, and ZL is load impedance, and dielectric is simultaneously
C in connection1For CVT high-voltage capacitance, C2For CVT low-voltage capacitance, R1, R2 represent equipment complex insulation resistance, C1'、C2' it is respectively height
Pressure, low-voltage comprehensive capacitance consider that the factors such as stray capacitance influence.CVT in the process of running, due to extraneous filthy, temperature and humidity with
And aging action influences, it is possible that external insulation resistance declines, capacity fall off, which holds increase and capacitor partial breakdown, leads to electricity
Capacity changes.
For RC parallel model medium, dielectric loss isWherein, δ is dielectric loss angle, without
When load, U is exported0With USRelationship is as follows:
Wherein,
Basic RC circuit is equivalent to input/output relation figure, then equivalent R, C are as follows:
For machine utilization, ignoring its variation influences, and ignores electromagnetic unit impedance loop, right if total equivalent load is ZL '
Model is further simplified,
It can be calculated:
Output voltage U is with low-voltage capacitance C2 and its dielectric loss ε2Increase and reduce, with its high-voltage capacitance C1 and its dielectric loss ε1
Increase and increase, output voltage U causes the accuracy of measuring to be joined with apparatus insulated performance with apparatus insulated performance parameter variations
Number variation.
In summary principle establishes energy metering capacitance type potential transformer based on multi-disciplinary big data shared platform
Accuracy of measuring remote online early warning system manages platform to evaluate warning module as core with acquisition system and compbined test
Data are resource, real-time watch device operating condition, the parameters variation tendency such as analysis CVT capacitance, dielectric loss and corresponding line loss, week
Phase property valuator device aging performance prejudges CVT accuracy variation degree.
In addition, in a specific example, the method also includes:
Step S201 judges whether the accuracy of measuring of voltage transformer is qualified according to the accuracy judgment criteria prestored.
Step S202 sends alarm command to warning device, institute if it is determined that the accuracy of measuring of voltage transformer is unqualified
It states alarm command and is used to indicate the warning device alarm.
As shown in figure 3, being a kind of voltage transformer accuracy of measuring on-line evaluation device provided in an embodiment of the present invention
Structural schematic diagram, comprising:
Critical point data acquisition module 301, for obtaining the critical point data of data collection system acquisition.
Standard critical point data acquisition module 302, for obtaining the standard critical point data of compbined test management platform storage.
Accuracy of measuring determining module 303, for determining voltage transformer according to critical point data and standard critical point data
The parameter variation tendency of capacitance, dielectric loss and corresponding line loss, and according to the capacitance of voltage transformer, dielectric loss and corresponding line loss
Parameter variation tendency determines the accuracy of measuring of voltage transformer.
In addition, in a specific example, described device further include:
Line loss per unit determining module, the line loss per unit table for line loss between the metering critical point of voltage transformer and reference point
Up to formula are as follows:
R'=r-f1+f2, wherein r' is that acquisition system shows line loss per unit, and r is route practical line loss rate, f1For stoichiometric point with
Voltage transformer ratio is poor, f2It is poor for reference point and voltage transformer ratio.
In addition, the voltage transformer includes capacitance partial pressure unit and electromagnetic unit, the electricity in a specific example
Hold the full film medium that partial pressure unit includes film paper complex media or parallel connection in parallel.
In addition, influence of the insulation system of the voltage transformer to metering performance includes interior in a specific example
Insulation performance, external insulation performance and ageing properties.
In addition, in a specific example, described device further include:
Judge whether the accuracy of measuring of voltage transformer is qualified according to the accuracy judgment criteria prestored.
If it is determined that the accuracy of measuring of voltage transformer is unqualified, alarm command is sent to warning device, the alarm refers to
Order is used to indicate the warning device alarm.
Specifically, the acceptance value section of accuracy is record in the accuracy judgment criteria prestored, if it is determined that mutual induction of voltage
The accuracy of measuring of device then determines that the accuracy of measuring of voltage transformer is unqualified not in interval of acceptance, sends alarm command
Staff is reminded to handle in time to warning device.Type of alarm can for audio alert, vibration alarming, buzzing alarm or
One of information alert type of alarm is a variety of.
In a specific example, each critical point CVT independent model is established, by high-potting Parameters variation situation, meter
It calculates equipment accuracy variation degree and provides comprehensive theory error.Based on critical point acquisition system platform, with CVT corresponding line line loss
Data variation amount veritifies theoretical error situation of change, and whether comprehensive descision CVT accuracy is abnormal, and carries out to anomalous variation trend
Early warning.CVT physical model under several typical environment factors establishes CVT and once tests parameter and secondary measurement accuracy test
Parameter relational model.Multilist levies factor Cooperative Analysis under big data, and deep power information acquisition system of excavating is tried with comprehensive extensively
Data platform mass data application is tested, and organically combines comprehensive analysis.Multi-channel data synchronous collection method, CVT metering performance
On-line monitoring system needs to acquire the CVT sampled value at multiple intervals in substation, realizes the acquisition data between multiple electrical quantity
It is synchronous, guarantee that synchronizing relay error is less than 10us, ensure that synchronism, the validity of data.Integrated evaluating method, model with
On the basis of a variety of evaluation means, carry out overall merit, globality judgement, method collaboration, test ginseng are made to CVT meter characteristic
Number association is evaluated jointly with two methods of online line loss analyzing, is verified each other, is greatly promoted method reliability.Establish CVT high
Pressure test parameter and the accuracy of measuring test parameter relational model.Multi-disciplinary test data usage mining, makes full use of high pressure to try
Period relatively short feature is tested, establishes first and second parameter relationship of equipment, it is long to make up the accuracy of measuring in a manner of online overall merit
The shortcomings that test period.Test data is combined with real time electrical quantity data on line under line, realizes related data good application.Reach
To the online evaluation of CVT metering performance, while realizing and running composition error under the virtual condition for establishing whole electric energy metering device
Measuring and calculating realize the on-line condition monitoring of entire metering gateway device (including electric energy meter, current-voltage transformer), fault diagnosis and
Status assessment is assessed for the state-detection of energy metering, intelligent diagnostics and provides strong support, relative to current online school
Proved recipe formula, input cost of the present invention is small, has better development prospect and space under the background of big data application.
It should be understood that the size of the serial number of each step is not meant that the order of the execution order in above-described embodiment, each process
Execution sequence should be determined by its function and internal logic, the implementation process without coping with the embodiment of the present invention constitutes any limit
It is fixed.
Fig. 4 is the schematic diagram of voltage transformer accuracy of measuring on-line evaluation terminal device provided in an embodiment of the present invention,
The terminal device 4 of the embodiment includes: processor 40, memory 41 and is stored in the memory 41 and can be at the place
The computer program 42 run on reason device 40, such as voltage transformer accuracy of measuring on-line evaluation program.The processor 40
Realize the step in above-mentioned each * * embodiment of the method when executing the computer program 42, for example, step 101 shown in FIG. 1 to
103.Alternatively, the processor 40 realizes each module/unit in above-mentioned each Installation practice when executing the computer program 42
Function, such as the function of module 301 to 303 shown in Fig. 3.
Illustratively, the computer program 42 can be divided into one or more module/units, it is one or
Multiple module/units are stored in the memory 41, and are executed by the processor 40, to complete the present invention.Described one
A or multiple module/units can be the series of computation machine program instruction section that can complete specific function, which is used for
Implementation procedure of the computer program 42 in the voltage transformer accuracy of measuring on-line evaluation terminal device 4 is described.
For example, the computer program 42 can be divided into synchronization module, summarizing module, obtain module, return module (virtual bench
In module), each module concrete function is as follows:
Obtain the critical point data of data collection system acquisition.
Obtain the standard critical point data of compbined test management platform storage.
The parameter of the capacitance of voltage transformer, dielectric loss and corresponding line loss is determined according to critical point data and standard critical point data
Variation tendency, and according to capacitance, the parameter variation tendency of dielectric loss and corresponding line loss determine the accurate measurement of voltage transformer
Degree.
The line loss per unit expression formula of line loss between the metering critical point of voltage transformer and reference point are as follows:
R'=r-f1+f2, wherein r' is that acquisition system shows line loss per unit, and r is route practical line loss rate, f1For stoichiometric point with
Voltage transformer ratio is poor, f2It is poor for reference point and voltage transformer ratio.
The voltage transformer includes capacitance partial pressure unit and electromagnetic unit, and the capacitance partial pressure unit includes film in parallel
Paper complex media or the full film medium of parallel connection.
Influence of the insulation system of the voltage transformer to metering performance include interior insulation performance, external insulation performance and
Ageing properties.
Judge whether the accuracy of measuring of voltage transformer is qualified according to the accuracy judgment criteria prestored.
If it is determined that the accuracy of measuring of voltage transformer is unqualified, alarm command is sent to warning device, the alarm refers to
Order is used to indicate the warning device alarm.
The voltage transformer accuracy of measuring on-line evaluation terminal device 4 can be desktop PC, notebook, the palm
Upper computer and cloud server etc. calculate equipment.The voltage transformer accuracy of measuring on-line evaluation terminal device may include,
But it is not limited only to, processor 40, memory 41.It will be understood by those skilled in the art that Fig. 4 is only that voltage transformer metering is quasi-
The example of exactness on-line evaluation terminal device 4 is not constituted to voltage transformer accuracy of measuring on-line evaluation terminal device 4
It limits, may include perhaps combining certain components or different components, such as described than illustrating more or fewer components
Voltage transformer accuracy of measuring on-line evaluation terminal device can also include input-output equipment, network access equipment, bus
Deng.
Alleged processor 40 can be central processing unit (Central Processing Unit, CPU), can also be
Other general processors, digital signal processor (Digital Signal Processor, DSP), specific integrated circuit
(Application Specific Integrated Circuit, ASIC), ready-made programmable gate array (Field-
Programmable Gate Array, FPGA) either other programmable logic device, discrete gate or transistor logic,
Discrete hardware components etc..General processor can be microprocessor or the processor is also possible to any conventional processor
Deng.
The memory 41 can be the storage inside of the voltage transformer accuracy of measuring on-line evaluation terminal device 4
Unit, such as the hard disk or memory of voltage transformer accuracy of measuring on-line evaluation terminal device 4.The memory 41 can also be with
It is the External memory equipment of the voltage transformer accuracy of measuring on-line evaluation terminal device 4, such as the voltage transformer
The plug-in type hard disk being equipped on accuracy of measuring on-line evaluation terminal device 4, intelligent memory card (Smart Media Card,
SMC), secure digital (Secure Digital, SD) blocks, flash card (Flash Card) etc..Further, the memory 41
Can also both including the voltage transformer accuracy of measuring on-line evaluation terminal device 4 internal storage unit and also including outside
Store equipment.The memory 41 is used to store the computer program and the voltage transformer accuracy of measuring is commented online
Other programs and data needed for valence terminal device.The memory 41, which can be also used for temporarily storing, to have exported or has incited somebody to action
The data to be exported.
It is apparent to those skilled in the art that for convenience of description and succinctly, only with above-mentioned each function
Can unit, module division progress for example, in practical application, can according to need and by above-mentioned function distribution by different
Functional unit, module are completed, i.e., the internal structure of described device is divided into different functional unit or module, more than completing
The all or part of function of description.Each functional unit in embodiment, module can integrate in one processing unit, can also
To be that each unit physically exists alone, can also be integrated in one unit with two or more units, it is above-mentioned integrated
Unit both can take the form of hardware realization, can also realize in the form of software functional units.In addition, each function list
Member, the specific name of module are also only for convenience of distinguishing each other, the protection scope being not intended to limit this application.Above system
The specific work process of middle unit, module, can refer to corresponding processes in the foregoing method embodiment, and details are not described herein.
In the above-described embodiments, it all emphasizes particularly on different fields to the description of each embodiment, is not described in detail or remembers in some embodiment
The part of load may refer to the associated description of other embodiments.
Those of ordinary skill in the art may be aware that list described in conjunction with the examples disclosed in the embodiments of the present disclosure
Member and algorithm steps can be realized with the combination of electronic hardware or computer software and electronic hardware.These functions are actually
It is implemented in hardware or software, the specific application and design constraint depending on technical solution.Professional technician
Each specific application can be used different methods to achieve the described function, but this realization is it is not considered that exceed
The scope of the present invention.
In embodiment provided by the present invention, it should be understood that disclosed device/terminal device and method, it can be with
It realizes by another way.For example, device described above/terminal device embodiment is only schematical, for example, institute
The division of module or unit is stated, only a kind of logical function partition, there may be another division manner in actual implementation, such as
Multiple units or components can be combined or can be integrated into another system, or some features can be ignored or not executed.Separately
A bit, shown or discussed mutual coupling or direct-coupling or communication connection can be through some interfaces, device
Or the INDIRECT COUPLING or communication connection of unit, it 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 module/unit be realized in the form of SFU software functional unit and as independent product sale or
In use, can store in a computer readable storage medium.Based on this understanding, the present invention realizes above-mentioned implementation
All or part of the process in example method, can also instruct relevant hardware to complete, the meter by computer program
Calculation machine program can be stored in a computer readable storage medium, the computer program when being executed by processor, it can be achieved that on
The step of stating each embodiment of the method.Wherein, the computer program includes computer program code, the computer program generation
Code can be source code form, object identification code form, executable file or certain intermediate forms etc..The computer-readable medium
It may include: any entity or device, recording medium, USB flash disk, mobile hard disk, magnetic that can carry the computer program code
Dish, CD, computer storage, read-only memory (ROM, Read-Only Memory), random access memory (RAM,
Random Access Memory), electric carrier signal, telecommunication signal and software distribution medium etc..It should be noted that described
The content that computer-readable medium includes can carry out increasing appropriate according to the requirement made laws in jurisdiction with patent practice
Subtract, such as in certain jurisdictions, according to legislation and patent practice, computer-readable medium do not include be electric carrier signal and
Telecommunication signal.
Embodiment described above is merely illustrative of the technical solution of the present invention, rather than its limitations；Although referring to aforementioned reality
Applying example, invention is explained in detail, those skilled in the art should understand that: it still can be to aforementioned each
Technical solution documented by embodiment is modified or equivalent replacement of some of the technical features；And these are modified
Or replacement, 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 should all
It is included within protection scope of the present invention.
Claims (10)
1. a kind of voltage transformer accuracy of measuring on-line evaluation method characterized by comprising
Obtain the critical point data of data collection system acquisition；
Obtain the standard critical point data of compbined test management platform storage；
The parameter variation of the capacitance, dielectric loss and corresponding line loss of voltage transformer is determined according to critical point data and standard critical point data
Trend, and according to capacitance, the parameter variation tendency of dielectric loss and corresponding line loss determine the accuracy of measuring of voltage transformer.
2. voltage transformer accuracy of measuring on-line evaluation method as described in claim 1, which is characterized in that further include:
The line loss per unit expression formula of line loss between the metering critical point of voltage transformer and reference point are as follows:
R'=r-f1+f2, wherein r' is that acquisition system shows line loss per unit, and r is route practical line loss rate, f1For stoichiometric point and voltage
Mutual inductor ratio is poor, f2It is poor for reference point and voltage transformer ratio.
3. voltage transformer accuracy of measuring on-line evaluation method as described in claim 1, which is characterized in that the voltage is mutual
Sensor includes capacitance partial pressure unit and electromagnetic unit, and the capacitance partial pressure unit includes film paper complex media or parallel connection in parallel
Full film medium.
4. voltage transformer accuracy of measuring on-line evaluation method as described in claim 1, which is characterized in that the voltage is mutual
Influence of the insulation system of sensor to metering performance includes interior insulation performance, external insulation performance and ageing properties.
5. voltage transformer accuracy of measuring on-line evaluation method as described in claim 1, which is characterized in that further include:
Judge whether the accuracy of measuring of voltage transformer is qualified according to the accuracy judgment criteria prestored；
If it is determined that the accuracy of measuring of voltage transformer is unqualified, alarm command is sent to warning device, the alarm command is used
In the instruction warning device alarm.
6. a kind of voltage transformer accuracy of measuring on-line evaluation device characterized by comprising
Critical point data acquisition module, for obtaining the critical point data of data collection system acquisition；
Standard critical point data acquisition module, for obtaining the standard critical point data of compbined test management platform storage；
Accuracy of measuring determining module, for determined according to critical point data and standard critical point data voltage transformer capacitance,
The parameter variation tendency of dielectric loss and corresponding line loss, and become according to the parameter of the capacitance of voltage transformer, dielectric loss and corresponding line loss
Change trend determines the accuracy of measuring of voltage transformer.
7. voltage transformer accuracy of measuring on-line evaluation device as claimed in claim 6, which is characterized in that further include:
Line loss per unit determining module, the line loss per unit expression formula for line loss between the metering critical point of voltage transformer and reference point
Are as follows:
R'=r-f1+f2, wherein r' is that acquisition system shows line loss per unit, and r is route practical line loss rate, f1For stoichiometric point and voltage
Mutual inductor ratio is poor, f2It is poor for reference point and voltage transformer ratio.
8. voltage transformer accuracy of measuring on-line evaluation device as claimed in claim 6, which is characterized in that the voltage is mutual
Sensor includes capacitance partial pressure unit and electromagnetic unit, and the capacitance partial pressure unit includes film paper complex media or parallel connection in parallel
Full film medium.
9. a kind of voltage transformer accuracy of measuring on-line evaluation terminal device, including memory, processor and it is stored in institute
State the computer program that can be run in memory and on the processor, which is characterized in that the processor executes the meter
It is realized when calculation machine program such as the step of any one of claim 1 to 5 the method.
10. a kind of computer readable storage medium, the computer-readable recording medium storage has computer program, and feature exists
In when the computer program is executed by processor the step of any one of such as claim 1 to 5 of realization the method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811359150.6A CN109270482B (en) | 2018-11-15 | 2018-11-15 | Online evaluation method for metering accuracy of voltage transformer and terminal equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811359150.6A CN109270482B (en) | 2018-11-15 | 2018-11-15 | Online evaluation method for metering accuracy of voltage transformer and terminal equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109270482A true CN109270482A (en) | 2019-01-25 |
| CN109270482B CN109270482B (en) | 2021-05-18 |
Family
ID=65189072
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811359150.6A Active CN109270482B (en) | 2018-11-15 | 2018-11-15 | Online evaluation method for metering accuracy of voltage transformer and terminal equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109270482B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110045212A (en) * | 2019-05-17 | 2019-07-23 | 中国电力科学研究院有限公司 | A kind of method and system that line loss per unit is evaluated based on electric energy metering device uncertainty |
| CN111610481A (en) * | 2020-04-20 | 2020-09-01 | 国网山东省电力公司青岛供电公司 | Method and system for detecting performance of capacitor voltage transformer |
| CN112763963A (en) * | 2020-11-26 | 2021-05-07 | 中国电力科学研究院有限公司 | System and method for carrying out online monitoring on mutual inductor based on deep network |
| CN113156358A (en) * | 2021-03-19 | 2021-07-23 | 国网陕西省电力公司营销服务中心(计量中心) | Overhead transmission line abnormal line loss analysis method and system |
| CN113311299A (en) * | 2021-05-26 | 2021-08-27 | 广西电网有限责任公司南宁供电局 | CVT insulation defect detection method and device |
| CN113835060A (en) * | 2021-11-23 | 2021-12-24 | 武汉格蓝若智能技术有限公司 | Power transformer online state monitoring method and system based on digital twinning |
| CN114002517A (en) * | 2020-07-28 | 2022-02-01 | 比亚迪股份有限公司 | Device diagnosis method, platform, system and readable storage medium |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101988958A (en) * | 2009-08-07 | 2011-03-23 | 华东电力试验研究院有限公司 | Checking device and checking method of accuracy of capacitor voltage transformer |
| CN202057784U (en) * | 2011-04-29 | 2011-11-30 | 广州市格宁电气有限公司 | Online calibrating and digital online monitoring system for electric energy meter |
| CN103018709A (en) * | 2012-12-18 | 2013-04-03 | 广东电网公司潮州供电局 | Method and system for monitoring error of gateway metering device |
| CN104267374A (en) * | 2014-10-17 | 2015-01-07 | 成都思晗科技有限公司 | Online detecting and state assessing system of metering device |
| JP2017108586A (en) * | 2015-12-11 | 2017-06-15 | 株式会社戸上電機製作所 | Solar cell module characteristics test apparatus |
| CN107329104A (en) * | 2017-07-10 | 2017-11-07 | 广西电网有限责任公司电力科学研究院 | A kind of electronic mutual inductor magnitude tracing method and system of meter and composition error |
| CN107643507A (en) * | 2017-09-05 | 2018-01-30 | 天津市电力科技发展有限公司 | A kind of lean line loss analyzing and management-control method based on power network line kinematic error remote calibration |
| CN108761159A (en) * | 2018-08-16 | 2018-11-06 | 烟台东方威思顿电气有限公司 | Metering device detecting system based on wide area synchro measure electric energy meter |
-
2018
- 2018-11-15 CN CN201811359150.6A patent/CN109270482B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101988958A (en) * | 2009-08-07 | 2011-03-23 | 华东电力试验研究院有限公司 | Checking device and checking method of accuracy of capacitor voltage transformer |
| CN202057784U (en) * | 2011-04-29 | 2011-11-30 | 广州市格宁电气有限公司 | Online calibrating and digital online monitoring system for electric energy meter |
| CN103018709A (en) * | 2012-12-18 | 2013-04-03 | 广东电网公司潮州供电局 | Method and system for monitoring error of gateway metering device |
| CN104267374A (en) * | 2014-10-17 | 2015-01-07 | 成都思晗科技有限公司 | Online detecting and state assessing system of metering device |
| JP2017108586A (en) * | 2015-12-11 | 2017-06-15 | 株式会社戸上電機製作所 | Solar cell module characteristics test apparatus |
| CN107329104A (en) * | 2017-07-10 | 2017-11-07 | 广西电网有限责任公司电力科学研究院 | A kind of electronic mutual inductor magnitude tracing method and system of meter and composition error |
| CN107643507A (en) * | 2017-09-05 | 2018-01-30 | 天津市电力科技发展有限公司 | A kind of lean line loss analyzing and management-control method based on power network line kinematic error remote calibration |
| CN108761159A (en) * | 2018-08-16 | 2018-11-06 | 烟台东方威思顿电气有限公司 | Metering device detecting system based on wide area synchro measure electric energy meter |
Non-Patent Citations (2)
| Title |
|---|
| 朱梦梦，等: "CVT电容量变化对计量准确度的影响分析", 《云南电力技术》 * |
| 段国志: "电容型设备带电测试技术分析", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110045212A (en) * | 2019-05-17 | 2019-07-23 | 中国电力科学研究院有限公司 | A kind of method and system that line loss per unit is evaluated based on electric energy metering device uncertainty |
| CN111610481A (en) * | 2020-04-20 | 2020-09-01 | 国网山东省电力公司青岛供电公司 | Method and system for detecting performance of capacitor voltage transformer |
| CN111610481B (en) * | 2020-04-20 | 2022-06-07 | 国网山东省电力公司青岛供电公司 | Method and system for detecting performance of capacitor voltage transformer |
| CN114002517A (en) * | 2020-07-28 | 2022-02-01 | 比亚迪股份有限公司 | Device diagnosis method, platform, system and readable storage medium |
| CN112763963A (en) * | 2020-11-26 | 2021-05-07 | 中国电力科学研究院有限公司 | System and method for carrying out online monitoring on mutual inductor based on deep network |
| CN112763963B (en) * | 2020-11-26 | 2024-05-14 | 中国电力科学研究院有限公司 | System and method for on-line monitoring of transformer based on depth network |
| CN113156358A (en) * | 2021-03-19 | 2021-07-23 | 国网陕西省电力公司营销服务中心(计量中心) | Overhead transmission line abnormal line loss analysis method and system |
| CN113156358B (en) * | 2021-03-19 | 2023-09-22 | 国网陕西省电力公司营销服务中心(计量中心) | Method and system for analyzing abnormal line loss of overhead transmission line |
| CN113311299A (en) * | 2021-05-26 | 2021-08-27 | 广西电网有限责任公司南宁供电局 | CVT insulation defect detection method and device |
| CN113835060A (en) * | 2021-11-23 | 2021-12-24 | 武汉格蓝若智能技术有限公司 | Power transformer online state monitoring method and system based on digital twinning |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109270482B (en) | 2021-05-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109270482A (en) | Voltage transformer accuracy of measuring on-line evaluation method and terminal device | |
| CN103001230B (en) | Non-invasive power load monitoring and decomposing current mode matching method | |
| CN111026927A (en) | Low-voltage transformer area running state intelligent monitoring system | |
| CN101441231B (en) | Harmonic electric energy metering error analytical apparatus | |
| CN109298379B (en) | Data monitoring-based intelligent electric meter field error abnormity identification method | |
| CN109031184A (en) | A kind of monitoring method of electric energy metering device, system and terminal device | |
| CN107741577B (en) | Gateway meter accuracy online monitoring and analyzing method and system | |
| CN104242447A (en) | Integrated measuring and controlling device and system of intelligent transformer substation | |
| CN104076321A (en) | On-line monitoring and evaluating system and method for digital electric energy meter | |
| CN105098763A (en) | Transient voltage stable on-line assessment method based on WAMS and EMS | |
| Luan et al. | Energy theft detection via integrated distribution state estimation based on AMI and SCADA measurements | |
| CN110907884A (en) | Electric energy meter error diagnosis and analysis method based on non-invasive measurement | |
| CN112731242A (en) | Calibration method of on-site calibrator of online power quality monitoring device | |
| CN104062617B (en) | Combining unit meter characteristic filed detection system and method thereof | |
| CN102521677A (en) | Optimal identification method of node equivalent transmission parameters based on single PMU measurement section | |
| CN106970346A (en) | A kind of method and system for electric energy measuring equipment remote calibration | |
| Medina-Gracia et al. | Power quality sensor for smart appliance’s self-diagnosing functionality | |
| CN201984125U (en) | Quick analysis and post-processing system for on-site test data of primary power equipment | |
| Ranjith et al. | Futuristic smart energy meter-design based on embedded perspective | |
| CN105843736B (en) | Test method of power system state estimation software | |
| Peng et al. | Design of Energy Information Collection and Analysis Terminal with Digital Edge Computing Capabilities | |
| CN105785149A (en) | Network tester for undercurrent grounding line selection apparatus of smart substation and network testing method therefor | |
| CN110896218B (en) | Harmonic modeling method and system for establishing collective residential load | |
| Matijašević et al. | Voltage-based machine learning algorithm for distribution of end-users consumption among the phases | |
| CN103954853A (en) | Area grid connection cluster primary-frequency-modulation assessment method and system |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211011 Address after: 050021 No. 238 South Sports street, Hebei, Shijiazhuang Patentee after: STATE GRID HEBEI ELECTRIC POWER Research Institute Patentee after: Marketing service center of State Grid Hebei Electric Power Co.,Ltd. Patentee after: STATE GRID CORPORATION OF CHINA Patentee after: STATE GRID HEBEI ENERGY TECHNOLOGY SERVICE Co.,Ltd. Address before: 050011 no.238, TIYU South Street, Yuhua District, Shijiazhuang City, Hebei Province Patentee before: STATE GRID HEBEI ELECTRIC POWER Research Institute Patentee before: STATE GRID CORPORATION OF CHINA Patentee before: STATE GRID HEBEI ENERGY TECHNOLOGY SERVICE Co.,Ltd. |