CN107576887A - Automatic positioning method of positioning system of electric energy quality disturbance source - Google Patents
Automatic positioning method of positioning system of electric energy quality disturbance source Download PDFInfo
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Abstract
The invention relates to an automatic positioning method of a positioning system of a power quality disturbance source, wherein the positioning system comprises a power quality management main station and power quality on-line monitoring devices connected with the main station through Ethernet; when an actual disturbance event occurs in the system, the power quality online monitoring device records the occurrence time of the disturbance source after detecting the disturbance event, informs other power quality online monitoring devices in the network in a broadcast mode through the Ethernet to start a disturbance wave recording system by taking the time as a reference, records the sampling data of N cycles before and N cycles after the time, sends the sampling data to a power quality management master station in real time, establishes a system coverage matrix and a system direction matrix through mutual cooperation among the power quality online monitoring devices, and then positions the disturbance source.
Description
The application is Application No.：201510097288.3 invention and created name is《A kind of power quality disturbance positioning
System and localization method》, the applying date is：The divisional application of the application for a patent for invention on March 4th, 2015.
Technical field
The present invention relates to pollution sources of electrical energy quality to monitor field on-line, and in particular to power quality disturbance in a kind of power network
Alignment system and localization method.
Background technology
Recently as the rapid development of economy, electric load increases swift and violent, power load increasingly complex and variation,
The abundant application apparatus of increasing non-linear, impact, uneven harmonic accesses power network in succession, all can be to some extent
Have influence on the quality of power supply of power supply grid.In addition the original such as monitoring means imperfection and operation operation, external interference and various failures
Cause, power quality problem become increasingly conspicuous.
Currently, study hotspot related to the quality of power supply in power system is concentrated mainly on the following aspects：Electric energy matter
Measure structure, the quality of power supply control of the identification processing of signal, quality of power supply evaluation index, electric energy quality on-line monitoring device and system
System etc..However, the location technology of disturbing source is also particularly significant after the generation of quality of power supply event, power department is not only facilitated with using
The reasonable solution of duty goal and dispute between family, and have to power department formulation quality of power supply mitigation and control strategy
Important guiding acts on.Therefore, it is necessary to the long-range of a set of quality of power supply, Centralizing inspection and analysis system are established, to influenceing electric energy
The temporary liter of the pollution sources of quality such as voltage or electric current, temporarily the index such as drop and short interruptions is analyzed, and finds out influence electric energy in time
The reason for quality pollution source, ensure power grid security, reliable, economical operation.
The localization method of power quality disturbance mainly has two categories below method in power distribution network at present：
1st, the decision method based on perturbation direction related table.Monitored on-line according to network structure in system and the quality of power supply
The deployment scenarios of device (PQMD), disturb between source position and each electric energy quality on-line monitoring device in pre- antecedent write through system
Perturbation direction relation table.When actual disturbance event occurs in system, disturbance side is carried out according to the measurement data of each monitoring point
To judgement, and be compared with the related table, to realize positioning function.The shortcomings that this method is：It must rely on manually
The positioning of disturbing source could be carried out by comparing, and operating efficiency is low.Although at present can be automatically analyzed by computer programming come
Realize being automatically positioned for disturbing source, but in some cases (such as the disturbing source on other circuits is monitored on-line to the quality of power supply and filled
The influence put, i.e., all branch road information can not be made full use of to carry out location determinations) when fuzzy object disturbing source be present, it is impossible to realize
It is accurately positioned, positioning accuracy and fault-tolerant ability are poor.
2nd, the character type localization method of the disturbing source direction determining based on single measuring point or multi-measuring point.According to cloth in power system
The single or multiple electric energy quality on-line monitoring devices put, study disturbing source direction determining algorithm corresponding to various event types.
For example, when voltage dip event occurring in power system or during harmonic wave event, using based on power of disturbance and disturbance energy, be based on
The methods of equiva lent impedance real part of symbol, judgement of the disturbance event generation in monitoring point forward or a backward can be achieved.Also have at present
Person proposes the power quality disturbance localization method based on genetic algorithm on this basis, and this method passes through to disturbing signal high frequency
The analysis of component mechanism of production, high fdrequency component is extracted using wavelet transformation, using the polarity of high frequency componentses energy as perturbation direction
The foundation of differentiation, and according to system topology and monitoring point deployment scenarios, establish disturbance source locating Optimized model, will disturb
Source orientation problem transforms into Zero-one integer programming problem, is solved using genetic algorithm.The shortcomings that this method is：It can only sentence
Front and rear direction of the disturbing source relative to the monitoring point is made, can not be real when quality of power supply event occurring in electric power networks
Being accurately positioned and (such as navigating to specific certain circuit) for disturbing source is realized, disturbance source locating Optimized model is established, is calculated using heredity
Method further increases the amount of calculation and amount of storage of electric energy quality on-line monitoring device.
The content of the invention
It can realize that disturbing source is accurately automatically positioned and eliminated automatically the technical problem to be solved in the present invention is to provide one kind to disturb
Dynamic source obscures item, efficiency high, simple in construction, cost is cheap, the alignment system of power quality disturbance that is easily achieved and disposes
Automatic positioning method.
Realize that the technical scheme of the object of the invention is to provide a kind of being automatically positioned for alignment system of power quality disturbance
Method, the alignment system of the power quality disturbance include Power quality management main website and in the defeated of radial pattern distribution system
The electric energy quality on-line monitoring device that each monitoring point of electric line is set, between each electric energy quality on-line monitoring device
Connected by Ethernet, connected between each electric energy quality on-line monitoring device and Power quality management main website by Ethernet；When
When actual disturbance event occurring in system, electric energy quality on-line monitoring device can record disturbing source hair after detecting disturbance event
Notify at the time of raw and that in a broadcast manner other electric energy quality on-line monitoring devices are with the moment in network by Ethernet
On the basis of start disturbance recording system, record the top n cycle and the sampled data of N number of cycle afterwards at the moment, N >=1, and
It is sent to Power quality management main website in real time；Power quality management main website stores each electric energy quality on-line monitoring device
Device number and the address of place monitoring point.
Further, the alignment system of the power quality disturbance also includes supporting the Ethernet of IEEE1588 agreements to hand over
Change planes, Power quality management main website supports IEEE1588 agreements, and electric energy quality on-line monitoring device, which is provided with, supports IEEE1588 associations
The Ethernet interface of view, pass through special shielding with each electric energy quality on-line monitoring device between Power quality management main website
Network connection is according to networking after general international standard access network based on ethernet interchanger, agreement when whole system uses IEEE1588 pairs
Carry out clock alignment.
The automatic positioning method of the alignment system of above-mentioned power quality disturbance, including the following steps：
1. the distribution system topological structure known to, is built with radical structure chart, and identifies each in whole system
The positional information of individual electric energy quality on-line monitoring device layout points；
2. whole system set covering theory is established, according to having each node of radical and electric energy quality on-line monitoring device in system
Correlative positional relation, the set covering theory A of definable systemL×M, AL×MIt can be completed in system initialization：
Wherein, L is to have the node total number in radical in system, the line segment quantity in M correspondence systems, is to pacify in whole system
The electric energy quality on-line monitoring device quantity of dress, matrix AL×MEach data ai×jJ-th of the quality of power supply exists in expression system
Line monitoring device layout points and the position relationship of i-th of electric energy quality on-line monitoring device monitoring point, initialization are specifically entered as：
If if LiPositioned at MjForward region, then make aij=-1, it is on the contrary；aij=+1, the M described in systemjBackward region refers to jth
The child node region of individual electric energy quality on-line monitoring device arrangement node and the node；Forward region refers to except backward region
Outer other node regions；
3. detect that the power network quality of power supply goes out according to the electric energy quality on-line monitoring device in system at a certain moment point
During the disturbance source event such as existing problem or generation electric current, voltage jump, the equipment can be recorded at the time of disturbing source occurs and passed through
Ethernet notifies other electric energy quality on-line monitoring device OnNow fault recording systems in network in a broadcast manner, note
Record the top n cycle and the sampled data of N number of cycle afterwards at the lower moment, N >=1, each quality of power supply is monitored on-line in system
Fiducial time of the agreement as whole system when IEEE1588 pairs is used between device and Power quality management main website；
4. after each electric energy quality on-line monitoring device equipment completes recording work, electric energy quality on-line monitoring device can
Event type is confirmed according to the noisy data detected；
5. each electric energy quality on-line monitoring device in network is somebody's turn to do to what Power quality management main website was sent in real time
The system set covering theory at moment and the product of system orientation matrix, the recorded broadcast at multiple moment playback mutually compare, each institute's recording
Source event is disturbed in the system location information acquisition system stored in the spectrum analysis of shape and Power quality management main website
Precise time and position, it is comprised the following steps that：
First, according to system set covering theory and occur disturbance source event when each electric energy quality on-line monitoring device it is real-time on
The information of main website is passed to, establishes the direction matrix B at the system momentM×1：
In formula, bjWhen disturbance source event occurs in expression system at i-th of line segment, j-th of quality of power supply on-line monitoring dress
Install the standby result of determination to disturbing source direction, if it is decided that disturbing source is backward disturbance, that is, determines disturbance source event and be located at
After j-th of electric energy quality on-line monitoring device equipment, then b is madej=+1；Conversely, bj=-1；bjValue carry markers, electric energy matter
Buret reason main website can then be established by the real time data information that each electric energy quality on-line monitoring device uploads occurs disturbing source
The system orientation matrix of event time；
Then, system set covering theory and the system orientation matrix at the moment are subjected to matrix multiplication operation, obtain result square
Battle array CL×1For：
Each element c in matrix of consequenceiValue and electric power networks topological structure and electric energy quality on-line monitoring device
Specific arrangement situation is relevant, according to ciThe absolute value of value whether be equal to the electric energy quality on-line monitoring device arranged in system
The element number of quantity, moment row element c is confirmed if equaliCorresponding line segment LiFor power quality disturbance；
Finally, after having preliminary disturbance source locating information, c is passed throughiValue it is online in the specific quality of power supply to determine
Monitoring device layout points and specific line segment, then Power quality management main website is sent to by each electric energy quality on-line monitoring device
The wave record playback function at the moment be compared and eliminate disturbing source and obscure item and accurate time, by being stored in the quality of power supply
Positional information in management main website or electric energy quality on-line monitoring device equipment can then obtain disturbance source event and occur specifically
Point.
Further, step 1. in, identified according to the device address of electric energy quality on-line monitoring device each in system
The deployment scenarios of electric energy quality on-line monitoring device, the table are stored in the database of Power quality management main website, as needed
Also the positional information of residing layout points can be stored in each electric energy quality on-line monitoring device.
Further, 4. step confirms that the specific method of disturbance event type is：Gather the transient state of each monitoring point in power network
Power Quality Disturbance, each monitoring point transient power quality disturbance voltage signal and current signal are obtained after filtering；To each
The transient power quality disturbance voltage signal of monitoring point carries out 2 layers of decomposition using form un-decimated wavelet transform, obtains second layer form
Un-decimated wavelet transform detail coefficients y2, if detail coefficients y2 modulus maximum is more than threshold value, branch road where this monitoring point is determined
For the branch road influenceed by transient power quality disturbance, and threshold value and lie farthest away will be exceeded in detail coefficients y2 modulus maximum point
Two time points be defined as disturbance occur start/stop time t1, t2；On the branch influenceed by transient power quality disturbance determined
The transient power quality disturbance voltage signal of monitoring point on road carries out the fundamental frequency width of window fourier transform extraction disturbing signal
Value tag V, wave distortion durations number feature H, disturbance zero crossing number feature O；Transient power quality disturbance voltage is believed
Number S-transformation is carried out, extract the maximum amplitude fluctuation characteristic Z and disturbing signal time-frequency deviation characteristics B of disturbing signal；Wherein extract ripple
Irregularity of wave form threshold value during shape distortion durations number feature H is set as 0.01；This five features are subjected to binary coding
Afterwards compared with binary threshold matrix, the type of disturbing signal is identified, while occurrence will be gone out in each monitoring point recognition result
The most type of number is defined as disturbing type.
The present invention has positive effect：(1) when present invention offer one kind is based on Ethernet pair, multiple spot monitoring can be carried out
Distribution, the electric energy quality monitoring system of Multi computer cooperation, pass through between each electric energy quality on-line monitoring device in system
IEEE 1588 to when agreement uniformly carry out clock alignment substitute it is traditional rely on GPRS calibrating modes, according to multi-measuring point electric energy matter
The markers recorded in amount on-Line Monitor Device carries out the cooperations such as disturbed depth, information broadcast and recording matching and establishes system covering square
Battle array and system orientation matrix, Power quality management main website can be according to the time at each moment, power/current direction and by simple
With when target matrix algorithm (system set covering theory and with when target system orientation matrix carry out matrix multiplication), Ge Ge electricity
The mutual comparison of institute's recording shape and the spectrum analysis of each institute's recording shape disturb to realize between energy quality on-line monitoring device
Source is accurately automatically positioned and eliminated automatically disturbing source fuzzy item, efficiency high, simple in construction, cost is cheap, is easily achieved and disposes
Distribution network electric energy quality disturbance source locating system and method.
(2) present invention combines the disturbing signal of multiple monitoring points in power network, and power quality disturbance is detected, identified
Result, its result such as analysis, output disturbance duration, disturbance type are accurately comprehensive；Simultaneously because monitor and analyze multiple prisons
The information of measuring point, being accurately positioned for disturbing source can be realized, be easy to clear and definite accident responsibility side and administer electrical energy power quality disturbance problem；
The quality of power supply information for detecting and analyzing can be sent in system main website by Ethernet and be preserved for a long time, be easy to record electricity comprehensively
Can quality disturbance data, facilitate that administrative department is quick, is visually known required electrical energy power quality disturbance for information about, further
Strengthen quality of power supply supervision and management work, the improvement and assessment for power quality problem provide true, accurate information, are structure
Build one large-scale high-quality electric power system and policy-making data are provided.
(3) present invention can quick and precisely detect disturbance in Disturbance Detection and identification using form un-decimated wavelet transform
Start/stop time, and the branch road by disturbing influence is determined, the scope of subsequent analysis can be reduced, makes the disturbing source detection point of the present invention
Analysis method is simpler, quick, effective.There are radical and system disturbance direction matrix by establishing, simplify and calculate, the quality of power supply exists
Line monitoring device carries out disturbance source locating automatically, efficiency high, can by mutually coordinated between electric energy quality on-line monitoring device
Eliminate fuzzy item.
(4) present invention combined window Fourier transformation (WDFT) and S-transformation, can extract five simultaneously in disturbed depth
The characteristic quantity of different transient disturbance sources feature can be reflected, and it is carried out obtain after binary coding 8 binary features to
Amount, by being compared to quickly recognize disturbance event type by this 8 vector of binary features and binary threshold matrix.
Due to combining the recognition result of multiple monitoring points, indivedual monitoring points can be avoided in system due to mistake caused by the factors such as very noisy
Interference and disturbing source to miscellaneous equipment recognition result obscure item, can monitor many places disturbing source simultaneously, and then ensure to disturb type
The correctness of identification.
(5) present invention is entered between each electric energy quality on-line monitoring device and main website using unified IEEE1588 agreements
Row clock is calibrated, and is accurately positioned and is divided into two steps：1) system Primary Location：System according to disturbing source event time occurs is covered
The type and orientation of lid matrix and the direction matrix preliminary judgement disturbing source of system；2) electric energy quality on-line monitoring device physics is set
It is standby to cooperate auxiliary positioning：Voltage sag source localization method only needs to measure voltage phase angle, current amplitude and the phase angle of monitoring point,
Disturbing source and monitoring point relative position are determined by judging the changed polarity of voltage dip generation moment reality current component, it is comprehensive
Spectrum analysis of multiple monitoring points to the analysis result, each institute's recording shape at the moment and electric energy matter is stored in power network
The each electric energy quality on-line monitoring device positional information of system of buret reason main website can determine that the accurate of voltage Sag Disturbance source
Position, fuzzy item is further eliminated, this method calculates simply, and precision is up to ns ranks.
Brief description of the drawings
Fig. 1 is the system architecture topological diagram of the present invention；
Fig. 2 represents the rooted tree that the topological structure shown in Fig. 1 is built by taking A phases as an example；
Fig. 3 is the disturbance source locating schematic diagram of the present invention.
Embodiment
(embodiment 1)
See Fig. 1, the alignment system of the power quality disturbance of the present embodiment includes the electric energy matter for supporting IEEE1588 agreements
Buret reason main website, electric energy quality on-line monitoring device (PQMD) electric energy matter with the Ethernet interface for supporting IEEE1588 agreements
Measure on-Line Monitor Device, support IEEE1588 agreements Ethernet switch, radial pattern distribution system transmission line of electricity it is every
Individual monitoring point sets an electric energy quality on-line monitoring device, is connected between each electric energy quality on-line monitoring device by Ethernet
Connect, connected between each electric energy quality on-line monitoring device and Power quality management main website by Ethernet, specifically, electric energy matter
It is logical according to the world by special shielding network connection with each electric energy quality on-line monitoring device between buret reason main website
With networking after standard access network based on ethernet interchanger, electric energy quality on-line monitoring device described in the present embodiment (PQMD) using
The model YPM-01 of Wuxi You electricity Science and Technology Ltd.s manufacture electric energy quality on-line monitoring device.It is actual when occurring in system
During disturbance event, electric energy quality on-line monitoring device can be recorded at the time of disturbing source occurs and passed through after detecting disturbance event
Ethernet notifies that other electric energy quality on-line monitoring devices start disturbance on the basis of the moment in network in a broadcast manner
Recording system, record the top n cycle at the moment and the sampled data of N number of cycle, N >=1, and be sent to electricity in real time afterwards
Energy quality management main website, system set covering theory and system are established by being cooperated between each electric energy quality on-line monitoring device
Direction matrix, show for interface wavy curve, disturbance source locating when eliminate and obscure the analysis of item and power quality parameter and carry out
Prepare.Power quality management main website stores the device number of each electric energy quality on-line monitoring device and the ground of place monitoring point
Location, agreement carries out clock alignment when whole system uses IEEE1588 pairs.
See Fig. 3, the automatic positioning method using the alignment system of above-mentioned power quality disturbance includes the following steps：
1. the distribution system topological structure known to, what structure one was commonly used in power system has radical structure chart,
And identify the positional information of each electric energy quality on-line monitoring device layout points in whole system.In the present embodiment, according to
The topological structure of system shown in Fig. 1, construct one in Power System Analysis commonly use rooted tree structure chart, and according to
The device address (stack address) of electric energy quality on-line monitoring device identifies each electric energy quality on-line monitoring device in system
Deployment scenarios.The table is stored in the database of Power quality management main website, as needed each quality of power supply on-line monitoring dress
Also the positional information of residing layout points can be stored in putting, makes decision to analyze for disturbance source locating and uses.
2. whole system set covering theory is established, according to having each node of radical and electric energy quality on-line monitoring device in system
Correlative positional relation, the set covering theory A of definable systemL×M, AL×MIt can be completed in system initialization：
Wherein, L is to have the node total number in radical in system, the line segment quantity in M correspondence systems, is to pacify in whole system
The electric energy quality on-line monitoring device quantity of dress, matrix AL×MEach data ai×jJ-th of the quality of power supply exists in expression system
Line monitoring device layout points and the position relationship of i-th of electric energy quality on-line monitoring device monitoring point, initialization are specifically entered as：
If if LiPositioned at MjForward region, then make aij=-1, it is on the contrary；aij=+1, the M described in systemjBackward region refers to jth
The child node region of individual electric energy quality on-line monitoring device arrangement node and the node；Forward region refers to except backward region
Outer other node regions.
In the present embodiment, root node is first electric energy quality on-line monitoring device on each circuit in Fig. 2 shown,
Equipment below, which sequentially adds this, to be had in radical.Wherein each electric energy quality on-line monitoring device sequence number (sequence number and device address it
Between also establish tables of data) line segment sequence number corresponding with topological structure shown in Fig. 1 is consistent.LaiRepresent the line segment sequence in the system
Number, PiRepresent the sequence number of electric energy quality on-line monitoring device equipment.
Relative bearing relation according to having each node and electric energy quality on-line monitoring device in radical establishes system covering
Matrix.
As shown in Figure 2：In power transmission line LaInterior joint number is 9, namely the line segment quantity of the distribution monitoring system is 9, sequence number
It is followed successively by La1~La9, the electric energy quality on-line monitoring device quantity of system actual disposition is 4.Definable system covering square accordingly
Battle array A9×4, matrix A9×4Each aijJ-th of electric energy quality on-line monitoring device layout points and i-th of node in expression system
Position relationship, if LaiPositioned at PjForward region, then make aij=-1；Conversely, aij=+1.
, can be to definition according to the relative bearing relation for having each node of radical and electric energy quality on-line monitoring device in system
System set covering theory A9×4Carry out tax initial value：
3. detect that the power network quality of power supply goes out according to the electric energy quality on-line monitoring device in system at a certain moment point
During the disturbance source event such as existing problem or generation electric current, voltage jump, the equipment can be recorded at the time of disturbing source occurs and passed through
Ethernet notifies other electric energy quality on-line monitoring device OnNow fault recording systems in network in a broadcast manner, note
Record the top n cycle and the sampled data of N number of cycle afterwards at the lower moment, N >=1, each quality of power supply is monitored on-line in system
Fiducial time of the agreement as whole system when IEEE1588 pairs is used between device and Power quality management main website, it is interface waveform
Curve is shown, disturbance source locating when eliminate disturbing source and obscure item and Power quality management main website and carry out data analysis and be ready.
N=8 in the present embodiment, when electric energy quality on-line monitoring device detects disturbance source event, the quality of power supply exists
Recording and broadcasting system in line monitoring device records before the moment 8 cycles and the afterwards sampled data of 8 cycles.
See Fig. 1, it is assumed that electric energy quality on-line monitoring device at A points finds that the power network quality of power supply goes wrong or occurred electricity
When stream, voltage jump, the equipment can be recorded at the time of disturbing source occurs and notify network in a broadcast manner by Ethernet
The middle timely startup separator recording system of other electric energy quality on-line monitoring devices, each electric energy quality on-line monitoring device receive
After broadcasting command, start recorded broadcast function and record before this moment 8 cycles and the afterwards sampled data of 8 cycles and will record
Under waveform be sent to Power quality management main website, each electric energy quality on-line monitoring device and Power quality management master in system
Unified between standing to carry out clock alignment using IEEE1588 agreements, the clock accuracy is shown up to ns levels for interface wavy curve
It is ready with power quality parameter analysis and decision during next step disturbance source locating.
4. after each electric energy quality on-line monitoring device equipment completes recording work, electric energy quality on-line monitoring device can
Event type is confirmed according to the noisy data detected：Gather the transient power quality disturbance signal of each monitoring point in power network, filter
Each monitoring point transient power quality disturbance voltage signal and current signal are obtained after ripple；To the transient power quality of each monitoring point
Disturbance voltage signal carries out 2 layers of decomposition using form un-decimated wavelet transform, obtains second layer form un-decimated wavelet transform detail coefficients y2,
If detail coefficients y2 modulus maximum is more than threshold value, branch road where this monitoring point is defined as by transient power quality disturbance shadow
Loud branch road, and two time points for exceeding threshold value and lie farthest away in detail coefficients y2 modulus maximum point are defined as disturbing
Start/stop time t1, t2 of generation；On the transient power of the monitoring point on the branch road influenceed by transient power quality disturbance determined
Quality disturbance voltage signal carries out the fundamental frequency amplitude Characteristics V of window fourier transform extraction disturbing signal, wave distortion continues week
Issue feature H, disturbance zero crossing number feature O；S-transformation, extraction disturbance letter are carried out to transient power quality disturbance voltage signal
Number maximum amplitude fluctuation characteristic Z and disturbing signal time-frequency deviation characteristics B；Wherein extract wave distortion durations number feature H
When irregularity of wave form threshold value be set as 0.01；By this five features carry out after binary codings with binary threshold matrix ratio
Compared with identifying the type of disturbing signal, while the most type of occurrence number in each monitoring point recognition result is defined as disturbing
Dynamic type；
5. each electric energy quality on-line monitoring device in network is somebody's turn to do to what Power quality management main website was sent in real time
The system set covering theory at moment and the product of system orientation matrix, the recorded broadcast at multiple moment playback mutually compare, each institute's recording
Source event is disturbed in the system location information acquisition system stored in the spectrum analysis of shape and Power quality management main website
Precise time and position, it is comprised the following steps that：
First, according to system set covering theory and occur disturbance source event when each electric energy quality on-line monitoring device it is real-time on
The information of main website is passed to, establishes the direction matrix B at the system momentM×1：
In formula, bjWhen disturbance source event occurs in expression system at i-th of line segment, j-th of quality of power supply on-line monitoring dress
Install the standby result of determination to disturbing source direction, if it is decided that disturbing source is backward disturbance, that is, determines disturbance source event and be located at
After j-th of electric energy quality on-line monitoring device equipment, then b is madej=+1；Conversely, bj=-1.bjValue carry markers, electric energy matter
Buret reason main website can then be established by the real time data information that each electric energy quality on-line monitoring device uploads occurs disturbing source
The system orientation matrix of event time.
In the present embodiment, when electrical energy power quality disturbance event occurs for transmission line of electricity, each electric energy quality on-line monitoring device
Noisy data can be monitored, after disturbing source event and being confirmed, each electric energy quality on-line monitoring device can be according to being
Direction matrix unite to determine the front and rear relative position relation of disturbing source and this electric energy quality on-line monitoring device layout points.
Accordingly, the direction matrix B of definable the system4×1, matrix B4×1In each data bijRepresent system neutral section
LaiDuring upper generation disturbance source event, serial number Pj electric energy quality on-line monitoring device is accordingly calculated according to power/current direction etc.
Method determines disturbing source and its front and rear relative position relation.Disturbed if forward direction, then make bj=-1；Conversely, bj=+1.
Shown in Fig. 2, it is assumed that respectively in circuit La2、La3Generation electrical energy power quality disturbance event, according to foregoing rule, to two kinds
In the case of corresponding system disturbance direction matrix BLa2、BLa3Assignment is as follows：
Then, system set covering theory and the system orientation matrix at the moment are subjected to matrix multiplication operation, obtain result square
Battle array CL×1For：
Each element c in matrix of consequenceiValue and electric power networks topological structure and electric energy quality on-line monitoring device
Specific arrangement situation is relevant, according to ciThe absolute value of value whether be equal to the electric energy quality on-line monitoring device arranged in system
The element number of quantity, moment row element c is confirmed if equaliCorresponding line segment LiFor power quality disturbance.
In the present embodiment, the recording system on the electric energy quality on-line monitoring device at B, C and D is all record at A points
Oscillogram and moment, main website when curtage mutation occurs can be uploaded by electric energy quality on-line monitoring device at B, C and D
Oscillogram on time the moment occurs to be accurately positioned out disturbing source at A points, C can be calculated according to formulaL2、CL3For：
Matrix of consequence CL×1In each element ciAbsolute value contain the information for judging power quality disturbance.CL2In
Two rows and CL3The absolute value of the third line element is equal to the quantity that electric energy quality on-line monitoring device detection device is installed in system, can
Preliminary judgement moment circuit La2、La3It is upper to have electrical energy power quality disturbance event simultaneously.
Finally, after having preliminary disturbance source locating information, c is passed throughiValue it is online in the specific quality of power supply to determine
Monitoring device layout points and specific line segment, then Power quality management main website is sent to by each electric energy quality on-line monitoring device
The wave record playback function at the moment be compared and eliminate disturbing source and obscure item and accurate time, by being stored in the quality of power supply
Positional information in management main website or electric energy quality on-line monitoring device equipment can then obtain disturbance source event and occur specifically
Point.
Claims (1)
- A kind of 1. automatic positioning method of the alignment system of power quality disturbance, it is characterised in that：The electrical energy power quality disturbance The alignment system in source includes Power quality management main website and each monitoring point of the transmission line of electricity in radial pattern distribution system is set The electric energy quality on-line monitoring device put, connected by Ethernet between each electric energy quality on-line monitoring device, each electricity It can be connected between quality on-line monitoring device and Power quality management main website by Ethernet；Thing is disturbed when reality occurs in system During part, electric energy quality on-line monitoring device can be recorded at the time of disturbing source occurs after detecting disturbance event and pass through Ethernet Notify that other electric energy quality on-line monitoring devices start disturbance recording system on the basis of the moment in network in a broadcast manner System, records the top n cycle at the moment and the sampled data of N number of cycle, N >=1, and be sent to the quality of power supply in real time afterwards Manage main website；Power quality management main website stores device number and the place monitoring point of each electric energy quality on-line monitoring device Address；The alignment system of the power quality disturbance also includes the Ethernet switch for supporting IEEE1588 agreements, electric energy Quality management main website supports IEEE1588 agreements, and electric energy quality on-line monitoring device is provided with the Ethernet for supporting IEEE1588 agreements Interface, pass through special shielding network connection with each electric energy quality on-line monitoring device between Power quality management main website According to networking after general international standard access network based on ethernet interchanger, agreement enters row clock school when whole system uses IEEE1588 pairs It is accurate；Automatic positioning method using the alignment system of above-mentioned power quality disturbance includes the following steps：1. the distribution system topological structure known to, is built with radical structure chart, and identify each electricity in whole system The positional information of energy quality on-line monitoring device layout points；2. establishing whole system set covering theory, according to having in system, each node of radical is related to electric energy quality on-line monitoring device Position relationship, the set covering theory A of definable systemL×M, AL×MIt can be completed in system initialization：Wherein, L is to have the node total number in radical in system, the line segment quantity in M correspondence systems, is what is installed in whole system Electric energy quality on-line monitoring device quantity, matrix AL×MEach data ai×jJ-th of the quality of power supply is supervised online in expression system Device layout points and the position relationship of i-th of electric energy quality on-line monitoring device monitoring point are surveyed, initialization is specifically entered as：If If LiPositioned at MjForward region, then make aij=-1, it is on the contrary；aij=+1, the M described in systemjBackward region refers to j-th of electricity The child node region of energy quality on-line monitoring device arrangement node and the node；Forward region refers in addition to backward region Other node regions；3. detect that the power network quality of power supply is asked according to the electric energy quality on-line monitoring device in system at a certain moment point During the disturbance source event such as topic or generation electric current, voltage jump, the equipment can be recorded at the time of disturbing source occurs and pass through ether Net notifies other electric energy quality on-line monitoring device OnNow fault recording systems in network in a broadcast manner, records The top n cycle at the moment and the afterwards sampled data of N number of cycle, N >=1, each electric energy quality on-line monitoring device in system Fiducial time of the agreement as whole system when IEEE1588 pairs is used between Power quality management main website；4. after each electric energy quality on-line monitoring device equipment completes recording work, electric energy quality on-line monitoring device can basis The noisy data detected confirms event type；Specific method is：Gather the transient power quality disturbance of each monitoring point in power network Signal, each monitoring point transient power quality disturbance voltage signal and current signal are obtained after filtering；To the transient state of each monitoring point Electrical energy power quality disturbance voltage signal carries out 2 layers of decomposition using form un-decimated wavelet transform, and it is thin to obtain second layer form un-decimated wavelet transform Coefficient y2 is saved, if detail coefficients y2 modulus maximum is more than threshold value, branch road where this monitoring point is defined as by transient power The branch road that quality disturbance influences, and two time points that threshold value and lie farthest away will be exceeded in detail coefficients y2 modulus maximum point It is defined as start/stop time t1, t2 that disturbance occurs；On the monitoring point on the branch road influenceed by transient power quality disturbance determined Transient power quality disturbance voltage signal carry out window fourier transform extraction disturbing signal fundamental frequency amplitude Characteristics V, waveform The durations number feature that distorts H, disturbance zero crossing number feature O；S-transformation is carried out to transient power quality disturbance voltage signal, Extract the maximum amplitude fluctuation characteristic Z and disturbing signal time-frequency deviation characteristics B of disturbing signal；Wherein extract wave distortion and continue week Irregularity of wave form threshold value during issue feature H is set as 0.01；By this five features carry out after binary codings with binary system threshold Value matrix compares, and identifies the type of disturbing signal, while by the most type of occurrence number in each monitoring point recognition result It is defined as disturbing type；5. moment that each electric energy quality on-line monitoring device in network is sent to Power quality management main website in real time System set covering theory and the product of system orientation matrix, the recorded broadcast at multiple moment playback mutually compare, each institute's recording shape The essence that source event occurs is disturbed in the system location information acquisition system stored in spectrum analysis and Power quality management main website True time and position, it is comprised the following steps that：First, uploaded in real time according to each electric energy quality on-line monitoring device when system set covering theory and generation disturbance source event The information of main website, establish the direction matrix B at the system momentM×1：In formula, bjWhen disturbance source event occurs in expression system at i-th of line segment, j-th of electric energy quality on-line monitoring device equipment To the result of determination in disturbing source direction, if it is decided that disturbing source is backward disturbance, that is, determines disturbance source event positioned at j-th of electricity After energy quality on-line monitoring device equipment, then b is madej=+1；Conversely, bj=-1；bjValue carry markers, Power quality management When main website can then establish generation disturbance source event by the real time data information that each electric energy quality on-line monitoring device uploads The system orientation matrix at quarter；<mrow> <mtable> <mtr> <mtd> <mrow> <msub> <mi>B</mi> <mrow> <mi>L</mi> <mi>a</mi> <mn>2</mn> </mrow> </msub> <mo>=</mo> <mfenced open = "[" close = "]"> <mtable> <mtr> <mtd> <mo>+</mo> <mn>1</mn> </mtd> </mtr> <mtr> <mtd> <mo>-</mo> <mn>1</mn> </mtd> </mtr> <mtr> <mtd> <mo>-</mo> <mn>1</mn> </mtd> </mtr> <mtr> <mtd> <mo>-</mo> <mn>1</mn> </mtd> </mtr> </mtable> </mfenced> </mrow> </mtd> <mtd> <mrow> <msub> <mi>B</mi> <mrow> <mi>L</mi> <mi>a</mi> <mn>3</mn> </mrow> </msub> <mo>=</mo> <mfenced open = "[" close = "]"> <mtable> <mtr> <mtd> <mo>+</mo> <mn>1</mn> </mtd> </mtr> <mtr> <mtd> <mo>+</mo> <mn>1</mn> </mtd> </mtr> <mtr> <mtd> <mo>-</mo> <mn>1</mn> </mtd> </mtr> <mtr> <mtd> <mo>-</mo> <mn>1</mn> </mtd> </mtr> </mtable> </mfenced> </mrow> </mtd> </mtr> </mtable> <mo>;</mo> </mrow>Then, system set covering theory and the system orientation matrix at the moment are subjected to matrix multiplication operation, obtain matrix of consequence CL×1 For：<mrow> <msub> <mi>C</mi> <mrow> <mi>L</mi> <mo>&times;</mo> <mn>1</mn> </mrow> </msub> <mo>=</mo> <msub> <mi>A</mi> <mrow> <mi>L</mi> <mo>&times;</mo> <mi>M</mi> </mrow> </msub> <mo>&times;</mo> <msub> <mi>B</mi> <mrow> <mi>M</mi> <mo>&times;</mo> <mn>1</mn> </mrow> </msub> <mo>=</mo> <mtable> <mtr> <mtd> <msub> <mi>L</mi> <mn>1</mn> </msub> </mtd> </mtr> <mtr> <mtd> <msub> <mi>L</mi> <mn>2</mn> </msub> </mtd> </mtr> <mtr> <mtd> <mo>.</mo> </mtd> </mtr> <mtr> <mtd> <mo>.</mo> </mtd> </mtr> <mtr> <mtd> <mo>.</mo> </mtd> </mtr> <mtr> <mtd> <msub> <mi>L</mi> <mi>i</mi> </msub> </mtd> </mtr> </mtable> <mfenced open = "[" close = "]"> <mtable> <mtr> <mtd> <msub> <mi>c</mi> <mn>1</mn> </msub> </mtd> </mtr> <mtr> <mtd> <msub> <mi>c</mi> <mn>2</mn> </msub> </mtd> </mtr> <mtr> <mtd> <mo>.</mo> </mtd> </mtr> <mtr> <mtd> <mo>.</mo> </mtd> </mtr> <mtr> <mtd> <mo>.</mo> </mtd> </mtr> <mtr> <mtd> <msub> <mi>c</mi> <mi>i</mi> </msub> </mtd> </mtr> </mtable> </mfenced> <mo>,</mo> </mrow>Each element c in matrix of consequenceiValue and electric power networks topological structure and electric energy quality on-line monitoring device specific cloth It is relevant to put situation, according to ciThe absolute value of value whether be equal to the quantity of electric energy quality on-line monitoring device arranged in system Element number, moment row element c is confirmed if equaliCorresponding line segment LiFor power quality disturbance；Finally, after having preliminary disturbance source locating information, c is passed throughiValue come determine the specific quality of power supply monitor on-line fill When putting layout points and specific line segment, then this of Power quality management main website be sent to by each electric energy quality on-line monitoring device The wave record playback function at quarter, which is compared, eliminates the fuzzy item of disturbing source and accurate time, by being stored in Power quality management master Stand or electric energy quality on-line monitoring device equipment on positional information can then obtain disturbance source event occur specified place.
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| CN107576888A (en) | 2018-01-12 |
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