CN108802571A - A kind of fault early warning method and its realization system based on spread spectrum acquisition and tangent line linear equation - Google Patents
A kind of fault early warning method and its realization system based on spread spectrum acquisition and tangent line linear equation Download PDFInfo
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- CN108802571A CN108802571A CN201810629448.8A CN201810629448A CN108802571A CN 108802571 A CN108802571 A CN 108802571A CN 201810629448 A CN201810629448 A CN 201810629448A CN 108802571 A CN108802571 A CN 108802571A
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- electric parameter
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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
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/086—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution networks, i.e. with interconnected conductors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
- G08B21/185—Electrical failure alarms
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
Abstract
The invention discloses a kind of fault early warning method based on spread spectrum acquisition and tangent line linear equation and its realize system, it is realized by using multiple sensors and interior environment temperature is become to case, humidity, temperature of cable junction, cable core temperature, cable current, and the air themperature in Public meteorology information, humidity, wind speed, wind direction, intensity of sunshine, the data monitoring acquisition of multiple variables such as electric parameters and non-electric parameter such as user power utilization load, above-mentioned data can reflect that case becomes the operating condition of electrical equipment and cable run comprehensively, processing and early warning judgement are carried out to the data that sensor transmission comes by data processing and warning module, and handling result is transferred to output display module by remote communication module and is shown；The device does not need priori and training early period, by carrying out real time data processing to multinomial electric parameter and non-electric parameter monitoring data, realizes online fault location, monitoring and forewarning management that case becomes, improves the real-time and reliability of early warning.
Description
Technical field
The invention belongs to distribution net cages to become on-line monitoring technique field, more particularly to a kind of based on spread spectrum acquisition and tangent line line
Property variance fault early warning method and its realize system.
Background technology
Due to Urban Landscape, urban safety and the needs of surge electricity consumption, city in all parts of the country are all carrying out power grid instantly
Transformation, power supply mode are changed to buried cable by overhead transmission line and bury, be changed to high pressure by low pressure, high power capacity is changed to by low capacity.It is beautiful
It is faced with Railway Project in the electric network reconstruction of Jiang Gucheng：First be building in ancient city is almost post and panel structure entirely, and street is small
The ground in lane is green stone floor tile entirely, is easy to cause fire and brokenization scenic spot；Second is that tunnel is relatively narrow, is lived intensive, it is difficult to concentrate
Power supply；Third is that the interim electricity consumption of " golden week " and festivals or holidays are apparent, does not be easy to cause high load capacity power supply and severe three-phase not
With problem.
On the one hand traditional monitoring and pre-alarming method is not consider other into line trace and monitoring for unitary variant
Factor influences each other；On the one hand it is that smooth pretreatment has been carried out to data before analyzing and processing data, does not account for accidental data
Value；On the other hand it is fixed gathered data frequency, does not make full use of the time-varying characteristics of sensor；It predicts to need simultaneously
A large amount of priori and training pattern, improve the complexity of algorithm.
Invention content
The present invention overcomes the shortcomings of the prior art, the technical problem to be solved is that：There is provided one kind can supervise simultaneously
Multiple variables such as electric parameter and non-electric parameter are surveyed, the validity and flatness feature for making full use of monitoring data to be mutated are realized real
When case become failure intelligent early-warning based on spread spectrum acquisition and tangent line linear equation fault early warning method and its realize system.
In order to solve the above technical problems, the technical solution adopted by the present invention is：Based on spread spectrum acquisition and tangent line linear equation
Fault early warning method, include the following steps：
S1, acquisition electric parameter data and non-electric parameter data；
S2, collected data in step S1 are judged using tangent line linear equation method；
S3, normal data output display will be judged in step S2；
S4, to judging that abnormal data carry out spread spectrum acquisition in step S2, again use tangent line linear equation method to expand
Frequently collected data are judged, and are added up to judging result, if accumulated result exceeds predetermined value, are determined as event
Hinder early warning, and fault pre-alarming information is exported and is shown；If accumulated result is less than predetermined value, it is judged to interfering, according to normal
Data processing.
The electric parameter data and non-electric parameter data acquired in the step S1 include case become interior environment temperature, humidity,
Temperature of cable junction, cable core temperature, cable current and the air themperature in Public meteorology information, humidity, wind speed, wind
To, intensity of sunshine, user power utilization load.
The present invention also provides a kind of systems for realizing the fault early warning method simultaneously, including
Sensor data acquisition module：For acquiring electric parameter data and non-electric parameter data；
Data processing and warning module：For being judged using tangent line linear equation method collected data；
Remote communication module：For realizing data transmission；
Export display module：Judging result is shown for exporting；
According to signal transmission direction, the sensor data acquisition module is linked in sequence data processing and early warning mould successively
Block, remote communication module and output display module.
The sensor data acquisition module includes temperature sensor, humidity sensor, load cell, voltage sensor
Device and current sensor.
Compared with prior art, the invention has the beneficial effects that：Technical solution provided by the invention is by using a variety of
Sensor is realized becomes interior environment temperature, humidity, temperature of cable junction, cable core temperature, cable current and public to case
The electric parameters and non-electric parameter etc. such as air themperature, humidity, wind speed, wind direction, intensity of sunshine, user power utilization load in weather information
The data monitoring of multiple variables acquires, and above-mentioned data can reflect that case becomes the operating condition of electrical equipment and cable run comprehensively,
The data come to sensor transmission by data processing and warning module using tangent line linear equation method handle and early warning
Judge, and handling result is transferred to output display module by remote communication module and is shown；The device does not need priori
Knowledge and training early period realize what case became by carrying out real time data processing to multinomial electric parameter and non-electric parameter monitoring data
Online fault location, monitoring and forewarning management, improve the real-time and reliability of early warning.
Description of the drawings
The present invention will be further described in detail below in conjunction with the accompanying drawings；
Fig. 1 is the flow chart of data processing schematic diagram of the present invention；
Fig. 2 is the system principle schematic diagram of the present invention.
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments；Based on the embodiments of the present invention, ordinary skill people
The every other embodiment that member is obtained without creative efforts, shall fall within the protection scope of the present invention.
As shown in Figure 1, the fault early warning method provided by the invention based on spread spectrum acquisition and tangent line linear equation specifically walks
It is rapid as follows：
S1, acquisition electric parameter data and non-electric parameter data；
S2, collected data in step S1 are judged using tangent line linear equation method；
S3, normal data output display will be judged in step S2；
S4, to judging that abnormal data carry out spread spectrum acquisition in step S2, again use tangent line linear equation method to expand
Frequently collected data are judged, and are added up to judging result, if accumulated result exceeds predetermined value, are determined as event
Hinder early warning, and fault pre-alarming information is exported and is shown；If accumulated result is less than predetermined value, it is judged to interfering, according to normal
Data processing.
The electric parameter data and non-electric parameter data acquired in the step S1 include case become interior environment temperature, humidity,
Temperature of cable junction, cable core temperature, cable current and the air themperature in Public meteorology information, humidity, wind speed, wind
To, intensity of sunshine, user power utilization load.
As shown in Fig. 2, it is provided by the invention it is a kind of realize based on spread spectrum acquisition and tangent line linear equation fault pre-alarming side
The system of method,
Including sensor data acquisition module：For acquiring electric parameter data and non-electric parameter data；
Data processing and warning module：For being judged using tangent line linear equation method collected data；
Remote communication module：For realizing data transmission；
Export display module：Judging result is shown for exporting；
According to signal transmission direction, the sensor data acquisition module is linked in sequence data processing and early warning mould successively
Block, remote communication module and output display module.
The sensor data acquisition module includes temperature sensor, humidity sensor, load cell, voltage sensor
Device and current sensor.
The operation principle to the above method and system and the course of work do further detailed specific description below：
The first step：Various sensors, data processing and warning module and remote communication module are installed in case change, and output is aobvious
Show that module installation becomes outer with case.Temperature sensor, humidity sensor, load cell, voltage sensor and current sensor
Not only realize that becoming the basic informations such as interior environment temperature, humidity, temperature of cable junction, cable core temperature, cable current to case adopts
Collection, can also extend the acquisition of Public meteorology information, as air themperature, humidity, wind speed, wind direction, intensity of sunshine, user power utilization are negative
The acquisition of the information such as load, collected data transmission to data processing and warning module pass through data processing and warning module pair
Data are handled and form report in real time, and the output that data supervision center is then sent to by remote communication mode shows mould
Block, output shows and notifies terminal user, while case change data information and Public meteorology information are carried out storage backup, is into one
The data processing of step provides premise foundation.
Second step：Data processing and warning module do not need priori and training pattern, by with priori decision threshold
It is compared to carry out classification processing, such as encounters interference and jump signal, improve frequency acquisition and judgement number, it is general to reduce false-alarm
The possibility of rate and erroneous judgement.Priori decision threshold is determined by tangent line linear equation, increases real-time, greatly reduces algorithm
Complexity.
Third walks：Using spread spectrum gathering algorithm, the meaning of jump signal is excavated.
Data ordinary circumstance is continuous, and will not be mutated, that is to say, that data are linear in subrange, are not had
There is great change.It is expected if monitoring data exceed suddenly, it may be possible to the interference signal of burst, it is also possible to sensor performance declines,
And be sensor fault, further determine that examination is handled.
First acquired original data prediction threshold value is compared, if it is decided that it is accidental data, by increasing sample frequency,
Continuous acquisition data discriminate whether effectively to acquire or forecasting sensor fault.
In formula, f (x) indicates that sampled data, x are sample frequency, and F is spread spectrum coefficient, and g (x) is prediction threshold value.
4th step：Using tangent line linear equation, prediction threshold value is determined.
Use priori data sample for reference value, the variance for choosing priori data is undulating value, and the tangent line of neighbor point is side
To value, prediction threshold value is derived.
In formula, σ 2 indicates population variance, and x is priori data, and μ is population mean, and N is Sample size
y-y0=f'(x0)(x-x0) tangential equation
Y=f (x) (3)
In formula, f ' (x) indicates that f (x) derivative, x0 and y0 are point of contact,
In formula, g (x) is prediction threshold value, and f ' (x) indicates that f (x) derivative, x0 and y0 are point of contact, and σ indicates population variance.
After obtaining y (x), judged by (1) formula, if it is decided that be accidental data, by spreading gathered data still
It is determined as accidental data, that is, shows that case change is broken down, sends out early warning, on-call maintenance processing.
5th step：Confirm and adjust initial value.
Initial value is respectively：2 temperature=1 DEG C N=5, σ, 2 electric currents of σ=20A, μ are f (x0), and sample frequency is 2 minutes one
It is secondary, F=60.
Based on this, by observing in real time and experiment shows：This programme not only solves case and becomes inner sensor data correlation
Sex chromosome mosaicism also improves accuracy and ease for operation in terms of case becomes equipment on-line monitoring and fault location, while can also have
Effect solves the problems, such as that sensor is disturbed, and improves the accuracy of early warning.
Finally it should be noted that：The above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Present invention has been described in detail with reference to the aforementioned embodiments for pipe, it will be understood by those of ordinary skill in the art that：Its according to
So can with technical scheme described in the above embodiments is modified, either to which part or all technical features into
Row equivalent replacement；And these modifications or replacements, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (4)
1. a kind of fault early warning method based on spread spectrum acquisition and tangent line linear equation, it is characterised in that：Include the following steps：
S1, acquisition electric parameter data and non-electric parameter data；
S2, collected data in step S1 are judged using tangent line linear equation method；
S3, normal data output display will be judged in step S2；
S4, to judging that abnormal data carry out spread spectrum acquisition in step S2, again use tangent line linear equation method to spread spectrum adopt
The data collected are judged, and are added up to judging result, if accumulated result exceeds predetermined value, are determined as that failure is pre-
It is alert, and fault pre-alarming information is exported and is shown；If accumulated result is less than predetermined value, it is judged to interfering, according to normal data
Processing.
2. the fault early warning method according to claim 1 based on spread spectrum acquisition and tangent line linear equation, it is characterised in that：
The electric parameter data and non-electric parameter data acquired in the step S1 includes that case becomes interior environment temperature, humidity, cable connector
Temperature, cable core temperature, cable current and air themperature, humidity, wind speed, wind direction, sunshine in Public meteorology information are strong
Degree, user power utilization load.
3. a kind of system for realizing fault early warning method described in claim 1, it is characterised in that：
Including sensor data acquisition module：For acquiring electric parameter data and non-electric parameter data；
Data processing and warning module：For being judged using tangent line linear equation method collected data；
Remote communication module：For realizing data transmission；
Export display module：Judging result is shown for exporting；
According to signal transmission direction, the sensor data acquisition module is linked in sequence data processing and warning module, remote successively
Journey communication module and output display module.
4. the system of fault early warning method according to claim 3, it is characterised in that：The sensor data acquisition module packet
Include temperature sensor, humidity sensor, load cell, voltage sensor and current sensor.
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Cited By (1)
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| CN109347978A (en) * | 2018-11-22 | 2019-02-15 | 天津众鑫锐智科技有限公司 | A kind of Intelligent internet of things computing platform |
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