CN107621593A - A kind of low-voltage method for early warning and device based on time series - Google Patents
A kind of low-voltage method for early warning and device based on time series Download PDFInfo
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- CN107621593A CN107621593A CN201710963959.9A CN201710963959A CN107621593A CN 107621593 A CN107621593 A CN 107621593A CN 201710963959 A CN201710963959 A CN 201710963959A CN 107621593 A CN107621593 A CN 107621593A
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Abstract
This application discloses a kind of low-voltage method for early warning based on time series and device, methods described to include：Obtain multiple voltage monitoring data at power distribution network terminal voltage monitoring point；The multiple voltage monitoring data are subjected to calculus of differences, obtain stable voltage monitoring sequence；Time series modeling is carried out to the stable voltage monitoring sequence of the voltage monitoring point, obtains time series models；Low-voltage early warning is carried out according to the time series models.Low-voltage method for early warning and device disclosed in the present application based on time series, effectively realize low-voltage early warning.
Description
Technical field
The application is related to low-voltage early warning field, more particularly to a kind of low-voltage method for early warning and dress based on time series
Put.
Background technology
Power system low-voltage risk reflection be it is phylogenetic cause system median generatrix voltage decline possibility and
The extent of injury, in recent years, some the significant blackouts accidents occurred both at home and abroad, social life and economic massive losses are caused,
Illustrate the necessity of construction powernet safety pre-warning system.
At present, the voltage online monitoring data of voltage monitoring point can only reflecting voltage monitoring point voltage condition, to low electricity
The occurrence of pressure, can not play forewarning function, and operation maintenance personnel (or monitoring personnel) is grasped less than or grasped inaccurate, it is impossible to has
The generation of effect prevention low-voltage.So voltage monitoring point online monitoring data is established in research, the low-voltage based on time series is pre-
Police's law technology, truly realizing voltage monitoring point low-voltage forewarning management.
The content of the invention
This application provides a kind of low-voltage method for early warning and device based on time series, to solve the low electricity of power distribution network
Press early warning problem.
In a first aspect, this application provides a kind of low-voltage method for early warning based on time series, methods described includes：
Obtain multiple voltage monitoring data at power distribution network terminal voltage monitoring point；
The multiple voltage monitoring data are subjected to calculus of differences, obtain stable voltage monitoring sequence；
Time series modeling is carried out to the stable voltage monitoring sequence of the voltage monitoring point, obtains time series mould
Type；
Low-voltage early warning is carried out according to the time series models.
Second aspect, present invention also provides a kind of low-voltage prior-warning device based on time series, including：Controller,
Computation chip, signal conditioning circuit, voltage data acquisition component and early warning component, wherein：
The voltage data acquisition component is electrically connected to the signal conditioning circuit, and the signal conditioning circuit is electrically connected to
The computation chip, the computation chip electrically connect with the controller, and the controller electrically connects with the early warning component；
The computation chip performs the method described in first aspect.
The beneficial effect of low-voltage method for early warning and device disclosed in the present application based on time series includes：
At present, the voltage online monitoring data of voltage monitoring point can only reflecting voltage monitoring point voltage condition, to low electricity
The occurrence of pressure, can not play forewarning function, and disclosed method can be according to the voltage at the voltage monitoring point collected
Monitoring Data carries out time series modeling, and the voltage condition of future time instance is predicted according to time series models, so as to effectively assist
Monitoring personnel grasps low voltage condition, and carries out early warning in time.
Brief description of the drawings
In order to illustrate more clearly of the technical scheme of the application, letter will be made to the required accompanying drawing used in embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, without having to pay creative labor,
Other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of low-voltage method for early warning schematic flow sheet based on time series that the embodiment of the present application provides；
Fig. 2 is a kind of step S300 schematic flow sheets that the embodiment of the present application provides；
Fig. 3 is the step S400 schematic flow sheets that the embodiment of the present application provides；
Fig. 4 is a kind of low-voltage prior-warning device structural representation based on time series that the embodiment of the present application provides.
Embodiment
Here exemplary embodiment will be illustrated in detail, its example is illustrated in the accompanying drawings.Following description is related to
During accompanying drawing, unless otherwise indicated, the same numbers in different accompanying drawings represent same or analogous key element.Following exemplary embodiment
Described in embodiment do not represent and the consistent all embodiments of the present invention.On the contrary, they be only with it is such as appended
The example of the consistent apparatus and method of some aspects being described in detail in claims, of the invention.
Referring to Fig. 1, a kind of low-voltage method for early warning flow signal based on time series provided for the embodiment of the present application
Figure.
In the step s 100, multiple voltage monitoring data at power distribution network terminal voltage monitoring point are obtained.
Low-voltage prior-warning device based on time series is arranged on power distribution network, the electricity at real-time collection voltages monitoring point
Pressure detection data.In the embodiment of the present application, exemplified by gathering a distribution 220V taiwan area terminal voltages monitoring point, ordinary circumstance
Under, 5 minutes voltage monitoring data of online acquisition.
By multiple voltage monitoring data storages of collection in database, provided effectively for voltage monitoring point low-voltage early warning
Information-based support, lift the accuracy rate and promptness rate of monitoring point low-voltage early warning.Alternatively, it is also possible to gather multiple voltage monitorings
Voltage monitoring data at point, database file is established for each voltage monitoring point in database.
In step s 200, the multiple voltage monitoring data are subjected to calculus of differences, obtain stable voltage monitoring sequence
Row.
Multiple voltage monitoring data at voltage monitoring point are obtained from database, multiple voltage monitoring data are looked into
Partite transport is calculated, wherein, operational formula of checking the mark is：Δ f (t)=f (t)-f (t-1), f (t) be current time voltage monitoring data, f
(t-1) it is the voltage monitoring data of last moment.After calculus of differences, a stable voltage monitoring sequence is obtained, steadily
Voltage monitoring sequence refer to the time series that average, variance and Autoregressive Functions do not change over time.
In step S300, time series modeling is carried out to the stable voltage monitoring sequence of the voltage monitoring point, obtained
To time series models；
In the embodiment of the present application, stable voltage monitoring sequence is obtained by calculus of differences, voltage monitoring sequence is one
Individual time series, is reflected in certain time period, and voltage monitoring data put in order according to the time, therefore, can be to voltage
The stable voltage monitoring sequence of monitoring point carries out time series modeling, obtains time series models.
Referring specifically to Fig. 2, a kind of step S300 schematic flow sheets provided for the embodiment of the present application.
In step S301, the smoothly voltage monitoring sequence is subjected to Modeling of Autocorrelation Function, obtains auto-correlation system
Number.
In step s 302, the smoothly voltage monitoring sequence is subjected to partial autocorrelation function modeling, obtained partially from phase
Relation number.
In step S303, autoregression integration moving average model is established.
In step s 304, according to the autoregression integral mean model and auto-correlation coefficient, PARCOR coefficients to institute
The stable voltage detecting data for stating voltage monitoring point carry out time series modeling, obtain time series models.
Modeling of Autocorrelation Function and partial autocorrelation function modeling are carried out according to stable voltage monitoring sequence, obtain auto-correlation
Coefficient and PARCOR coefficients.Moving average model and the auto-correlation coefficient and PARCOR coefficients of acquirement are integrated using autoregression
Time series modeling is carried out to voltage monitoring point online monitoring data, obtains time series models.
In step S400, low-voltage early warning is carried out according to the time series models.
Time series models reflect the situation of change of different time sections voltage, therefore, when input in a model according to when
Between sequence permutation voltage monitoring data after, the change of following a certain section of time voltage can be predicted according to time series models, from
And early warning is carried out according to the change of following voltage.
Specific reference to Fig. 3, the step S400 schematic flow sheets provided for the embodiment of the present application.
In step S401, by the smoothly time series models described in voltage monitoring sequence inputting, predicted value is obtained.
After establishing time series models, early warning can be carried out according to time series models.By the stable voltage of acquisition
Monitoring data sequent is as the prediction in input data input time series model, obtaining following certain time or some time point
Value.
In step S402, if the preset value is less than default early warning value, low-voltage early warning is carried out.
The early warning value that voltage monitoring point can be set in the embodiment of the present application is 209V, also, for different voltage monitorings
The settable different early warning value of point.Predicted value and early warning value are contrasted, if predicted value is less than early warning value, it is pre- to carry out low-voltage
It is alert.
Seen from the above description, the low-voltage method for early warning based on time series that the embodiment of the present application provides, effectively solution
The problem of certainly monitoring personnel is grasped less than or grasps inaccurate low voltage condition, prevents the generation of low-voltage, realizes voltage monitoring
Point low-voltage early warning.
Referring to Fig. 4, a kind of low-voltage prior-warning device structural representation based on time series provided for the embodiment of the present application
Figure, including：Controller, computation chip, signal conditioning circuit, voltage data acquisition component and early warning component, wherein：
Voltage data acquisition component is electrically connected to signal conditioning circuit, and signal conditioning circuit is electrically connected to computation chip, meter
Amount chip is electrically connected with the controller, and controller electrically connects with early warning component；
The voltage monitoring data based on time series of computation chip receiving voltage data acquisition components collection, and utilize
Time series models calculate predicted value, and the predicted value that controller calculates according to computation chip controls early warning component early warning.
Signal conditioning circuit is used to carry out noise reduction process to the voltage monitoring data of collection, after computation chip is according to noise reduction
The method that voltage monitoring data call above-described embodiment provides, finally early warning component is controlled to carry out early warning by controller.Early warning group
Part may be configured as alarm or buzzer.
In addition, the device that the embodiment of the present application provides also includes communication component, communication component is electrically connected with the controller, and
Communicated with terminal.Computation chip sends the predicted value being calculated to controller, and controller is by communication component by predicted value
Transmission to terminal is analyzed, stored.
In the low-voltage prior-warning device based on time series provided using the embodiment of the present application, voltage data is gathered
Component is arranged at the voltage monitoring point on power network, and collection voltages Monitoring Data in real time.The embodiment of the present application provide based on
The low-voltage prior-warning device module integrated level of time series is high, hardware configuration is simple, therefore small volume, can be quick in the process of use
Installation, and carry it is convenient.
In addition, also sucker can be set on the low-voltage prior-warning device based on time series, screw is not needed when mounted
Deng fixation kit, directly adsorb in and can be used on power distribution cabinet.
Seen from the above description, the low-voltage prior-warning device based on time series that the embodiment of the present application provides, is realized low
Voltage early warning, at the same install, convenient disassembly it is quick.
It is required that those skilled in the art can be understood that the technology in the embodiment of the present invention can add by software
The mode of general hardware platform realize.Based on such understanding, the technical scheme in the embodiment of the present invention substantially or
Say that the part to be contributed to prior art can be embodied in the form of software product, the computer software product can be deposited
Storage is in storage medium, such as ROM/RAM, magnetic disc, CD, including some instructions are causing a computer equipment (can be with
Be personal computer, server, either network equipment etc.) perform some part institutes of each embodiment of the present invention or embodiment
The method stated.
In this specification between each embodiment identical similar part mutually referring to.Especially for ... implement
For example, because it is substantially similar to embodiment of the method, so description is fairly simple, related part is referring in embodiment of the method
Explanation.
Invention described above embodiment is not intended to limit the scope of the present invention..
Those skilled in the art will readily occur to the present invention its after considering specification and putting into practice the disclosure invented here
Its embodiment.The application be intended to the present invention any modification, purposes or adaptations, these modifications, purposes or
Person's adaptations follow the general principle of the present invention and including undocumented common knowledges in the art of the invention
Or conventional techniques.Description and embodiments are considered only as exemplary, and true scope and spirit of the invention are by following
Claim is pointed out.
It should be appreciated that the invention is not limited in the precision architecture for being described above and being shown in the drawings, and
And various modifications and changes can be being carried out without departing from the scope.The scope of the present invention is only limited by appended claim.
Claims (8)
1. a kind of low-voltage method for early warning based on time series, it is characterised in that methods described includes：
Obtain multiple voltage monitoring data at power distribution network terminal voltage monitoring point；
The multiple voltage monitoring data are subjected to calculus of differences, obtain stable voltage monitoring sequence；
Time series modeling is carried out to the stable voltage monitoring sequence of the voltage monitoring point, obtains time series models；
Low-voltage early warning is carried out according to the time series models.
2. according to the method for claim 1, it is characterised in that the stable voltage monitoring to the voltage monitoring point
Sequence carries out time series modeling, including：
The smoothly voltage monitoring sequence is subjected to Modeling of Autocorrelation Function, obtains auto-correlation coefficient；
The smoothly voltage monitoring sequence is subjected to partial autocorrelation function modeling, obtains PARCOR coefficients；
Establish autoregression integration moving average model；
It is steady to the voltage monitoring point according to the autoregression integral mean model and auto-correlation coefficient, PARCOR coefficients
Voltage detecting data carry out time series modeling, obtain time series models.
3. according to the method for claim 1, it is characterised in that low-voltage early warning is carried out according to the time series models,
Including：
By the smoothly time series models described in voltage monitoring sequence inputting, predicted value is obtained；
If the predicted value is less than default early warning value, low-voltage early warning is carried out.
4. according to the method for claim 1, it is characterised in that the multiple voltage monitoring data are subjected to calculus of differences,
Stable voltage monitoring sequence is obtained, including：
Calculus of differences formula is：Δ f (t)=f (t)-f (t-1)；Wherein, the f (t) is the voltage monitoring data at current time,
The f (t-1) is the voltage monitoring data of last moment.
5. according to the method for claim 1, it is characterised in that the smoothly voltage monitoring sequence be average, variance and
The time series that Autoregressive Functions do not change over time.
A kind of 6. low-voltage prior-warning device based on time series, it is characterised in that including：Controller, computation chip, signal are adjusted
Circuit, voltage data acquisition component and early warning component are managed, wherein：
The voltage data acquisition component is electrically connected to the signal conditioning circuit, and the signal conditioning circuit is electrically connected to described
Computation chip, the computation chip electrically connect with the controller, and the controller electrically connects with the early warning component；
The computation chip performs the method as described in claim 1-5 is any.
7. device according to claim 6, it is characterised in that also including communication component, the communication component and the control
Device electrical connection processed, the communication component communicate with terminal.
8. device according to claim 6, it is characterised in that the early warning component is arranged to alarm or buzzer.
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| CN111242348A (en) * | 2019-12-30 | 2020-06-05 | 安徽先兆科技有限公司 | Electrical safety monitoring method and system based on time sequence |
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Application publication date: 20180123 |