CN107238764B - The electric energy quality monitoring method and device of electric system - Google Patents
The electric energy quality monitoring method and device of electric system Download PDFInfo
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Abstract
The electric energy quality monitoring method and device of present invention offer electric system, wherein, it include: the monitoring record data inquired according to index information in the electric system, the monitoring record data include recording head information and record block message, include markers domain, data channel information domain and record data block first address in the recording head information；Corresponding recording head information in the electric system is extracted based on index information, to parse the markers domain and data channel information domain in recording head information；Obtain the data met in the record block message of the index information.The present invention reduces the public attribute for saving monitoring record data in electric system, thus data storage capacity.It simultaneously by adding a small amount of recording head information as redundancy, and combines and parses detailed data step by step from common information, to reduce the complexity of data management.The present invention can quickly locate the storage location of monitoring record data by index information, and access speed is significantly improved.
Description
Technical field
The present invention relates to field of electric power automation more particularly to the electric energy quality monitoring methods and device of electric system.
Background technique
With the expansion of smart grid and the increase of high quality power demand, a large amount of manufacturers enter equipment for monitoring power quality
Market, product competition are increasingly fierce.Client flexibly matches monitoring index, data record amount of storage time, device power quality
Efficient management of the devices data such as online query of data record etc. is proposed more requirements.Due to being supervised to power quality in the industry
Survey the record period of index and the otherness of calculation method, the hardware performance limitation and the configuration of user's monitoring data of embedded equipment
Diversified requirement, the efficient storage and quick-searching of power quality data are always the problem of electric energy quality monitoring.
The memory mechanism of the power quality of the prior art mainly includes the following three types.
One is the ordered storage of uncorrected data, it is suitable for the unification of recording unit compound with regular structure, data storage capacity are smaller
The case where.But power quality device has the characteristics that amount of storage is big and data category is various.
The second is file system, file management system is used, when can be according to the classification and record of power quality data
Between divide file be managed.But in monitoring process, if user change power quality data index record period or
The complexity of person's classification, file management can greatly improve.Since power quality data classification is more, accessing operation needs are opened up big
The file handle of amount, while when retrieving record, system also needs to carry out handle data flow serialization analysis, therefore file pipe
The overhead of reason is bigger, and data access efficiency is not high.With the increase of data category increased with data storage capacity, application
The data access performance of this method will receive influence.Currently, PQDif file storage is one of power quality data management important
Direction often first passes through the storage of initial data, then due to the real-time data memory for not supporting serializing to record of the format
Intensively carry out the file conversion of the format.
The third is memory database, gives memory database data management, is realized and recorded by bitmap multistage-mapping
Efficient management.But this method one side memory database is relatively high to system configuration requirements, on the other hand commercial memory
Database price is higher, if equipment for monitoring power quality takes this method to will lead to increasing on hardware and software cost.
Summary of the invention
First aspect present invention provides the electric energy quality monitoring method of electric system, wherein includes the following steps: basis
Index information inquires the monitoring record data in the electric system, and the monitoring record data include recording head information and record
Block message includes markers domain, data channel information domain and record data block first address in the recording head information；Believed based on index
Breath extracts corresponding recording head information in the electric system, to parse markers domain and the data channel information in recording head information
Domain；Obtain the data met in the record block message of the index information.Power Quality Detection mechanism of the invention passes through
The public attribute for saving monitoring record data in electric system is reduced, to be further reduced overall data amount of storage.Lead to simultaneously
It crosses and adds a small amount of recording head information as redundancy, and combine and parse detailed data step by step from common information, with
Reduce the complexity of data management.The present invention also extracts the common information of monitoring record data, and with variable record
Block message part separate storage, then the efficiency of data management can be obtained by and further increase.In addition, the present invention passes through index
Information can quickly locate the storage location of monitoring record data, then access speed can also be significantly improved.
Further, the index information includes date information and time index information without hesitation, wherein the extraction step
Further include: corresponding recording head information in the electric system is extracted based on date index information and time index information grading.
Further, the index information includes date information and time index information without hesitation, wherein the analyzing step
Further include: markers domain and data channel information domain in classification parsing recording head information.
Further, the index step further include: based on the index information successively from the first ground of the record data block
Location offset, to position the specific data in the corresponding record block message in the data channel information domain.
Further, data channel information domain described in each is (t, v), and wherein t is markers, and v is data,
Data source collection is combined into Ο={ oi| i=1 ... N }, record period collection is combined into Ρ={ pi| i=1 ..., L }, calculating side
Method collection is combined into Μ={ mi| i=1 ..., M }.
Further, the information matrix in the data channel information domain are as follows:
Wherein, A and B is unitary matrice,And L0For the record period number of user configuration.
Further, the data block unit are as follows:
{vi,j,k|ai,j=1, bj,k=1,1≤j≤M, 1≤k≤N }.
Further, the type in the data channel information domain includes any one of following or appoints multinomial: frequency；Voltage；Electricity
Pressure is uneven；Voltage harmonic；Voltage m-Acetyl chlorophosphonazo；Carrier voltage；Voltage supplied deviation；Flickering；Active power；Reactive power.
Second aspect of the present invention provides the equipment for monitoring power quality of electric system, wherein and it include: inquiry unit,
For inquiring the monitoring record data in the electric system according to index information, the monitoring record data include record head letter
Block message is ceased and recorded, includes markers domain, data channel information domain and record data block first address in the recording head information；It mentions
Resolver is taken, is used to extract corresponding recording head information in the electric system based on index information, to parse record head
Markers domain and data channel information domain in information；Acquisition device is used to obtain the record block letter for meeting index information
Data in breath.Power Quality Detection mechanism of the invention saves the public category of monitoring record data in electric system by reducing
Property, to be further reduced overall data amount of storage.Simultaneously by adding a small amount of recording head information as redundancy, and tie
Conjunction parses detailed data step by step from common information, to reduce the complexity of data management.The present invention is also monitoring record
The common information of data extracts, and with variable record block message part separate storage, then the efficiency of data management is just
It is available to further increase.In addition, the present invention can quickly locate the storage position of monitoring record data by index information
It sets, then access speed can also be significantly improved.
Further, the index information includes time information and date index information without hesitation, wherein the extraction parsing
Device is also used to: extracting corresponding record head letter in the electric system based on date index information and time index information grading
Breath.
Further, the index information includes time information and date index information without hesitation, wherein the extraction parsing
Device is also used to: markers domain and data channel information domain in classification parsing recording head information.
Further, the extraction resolver is also used to: based on the index information successively from the record data block
First address offset, to position the specific data in the corresponding record block message in the data channel information domain.
Further, data channel information domain described in each is (t, v), and wherein t is markers, and v is data,
Data source collection is combined into Ο={ oi| i=1 ... N }, record period collection is combined into Ρ={ pi| i=1 ..., L }, calculating side
Method collection is combined into Μ={ mi| i=1 ..., M }.
Further, the information matrix in the data channel information domain are as follows:
Wherein, A and B is unitary matrice,And L0For the record period number of user configuration.
Further, the data block unit are as follows:
{vi,j,k|ai,j=1, bj,k=1,1≤j≤M, 1≤k≤N }.
Further, the type in the data channel information domain includes any one of following or appoints multinomial: frequency；Voltage；Electricity
Pressure is uneven；Voltage harmonic；Voltage m-Acetyl chlorophosphonazo；Carrier voltage；Voltage supplied deviation；Flickering；Active power；Reactive power.
Detailed description of the invention
Fig. 1 is the step process of the electric energy quality monitoring method of electric system accord to a specific embodiment of that present invention
Figure；
Fig. 2 is the monitoring of the electric energy quality monitoring method and device of electric system accord to a specific embodiment of that present invention
Record the data structure schematic diagram of data；
Fig. 3 is the monitoring of the electric energy quality monitoring method and device of electric system accord to a specific embodiment of that present invention
Record the hierarchical index schematic diagram of mechanism of data；
Fig. 4 is the structural representation of the electric energy quality monitoring method of electric system accord to a specific embodiment of that present invention
Figure.
Specific embodiment
Below in conjunction with attached drawing, description of specific embodiments of the present invention.
The measurement index of equipment for monitoring power quality is related to extensive data source, mainly include transient affair class data and
Stable state counts class data.The definition index of transient affair class data at home and abroad standard is essentially identical, mainly include voltage swells,
The events such as rapid drawdown, fast transient.Transient affair class data record unit memory space is smaller, generates frequency uncertainty by force, number
It measures less.
As shown in Table 1 and Table 2, stable state statistics class data define in each standard difference it is bigger, generally comprise frequently
Rate, voltage, flickering, Voltage unbalance, harmonic wave, m-Acetyl chlorophosphonazo, additional signal voltage, deviation voltage etc..In wind power plant access standard
The monitoring data of definition further include active power and reactive power etc..Calculation method have integration period mean value and maximin,
Root-mean-square value, arithmetic value, cumulative probability function assessed value etc., record period have the plurality of classes such as 3 seconds to 2 hours.However, each province
City Utilities Electric Co. respectively have difference to the configuration of electric energy quality monitoring index, record period and calculation method and storage cycle request
It is different.On the one hand with the operation of equipment for monitoring power quality, stable state counts class data volume will be linearly increasing, the preservation and inspection of data
Suo Sudu will receive influence.Another aspect user may be adjusted at any time according to higher level request such data configuration (for example, with
Electric load peak time, for the data source of electric energy quality monitoring than usually more, record period is shorter, and monitoring index also can be based on more
More calculation methods), identical monitoring index is potentially based on different record period and calculation method, data configuration in different time
Tracking then increase the complexity of data management.So the management of such data is more complicated in electric energy quality monitoring, if
Traditional embedded equipment storage strategy is taken, the performances such as data query and management will receive very big influence.
The record period of electric energy quality monitoring index in 1 standard of table
Electric energy quality monitoring index calculating method in 2 standard of table
The data volume increase of electric energy quality monitoring needs to read when leading to retrieve data parses more data.Data configuration
Variation be mainly manifested in the type of record and the detailed content of every record, such as markers, numerical value and state.However, no matter
How configuration changes, and there is always some general character in record, for example, part record might have identical time scale information, monitoring index
The relative rank for calculating and storing in a device is fixed.
Therefore, Power Quality Detection mechanism of the invention by reduce save electric system in monitoring record data it is public
Attribute, to be further reduced overall data amount of storage.Simultaneously by adding a small amount of recording head information as redundancy, and
In conjunction with detailed data are parsed step by step from common information, to reduce the complexity of data management.The present invention also remembers monitoring
Record data common information extract, and with variable record block message part separate storage, then the efficiency of data management
It can be obtained by and further increase.In addition, the present invention can quickly locate the storage of monitoring record data by index information
Position, then access speed can also be significantly improved.
The electric energy quality monitoring method of electric system of the invention is illustrated below with reference to a preferred embodiment.Such as
Shown in Fig. 1, step S1 is first carried out, the monitoring record data in index information inquiry electric system submitted according to user.Example
Such as, when carrying out Power Quality Detection to certain paper mill, the index information that user submits is " 20 minutes 23 points of on November 11st, 2015
35 seconds voltage Vb ".Wherein, as shown in Fig. 2, monitoring record data 100 include recording head information 110 and record block message 120,
It include markers domain 111, data channel information domain 112 and record data block first address 113 in the recording head information 110.Record
Head information is the redundancy that the present invention deliberately adds.Wherein, markers domain 111 is date every minute and second.Data channel information domain
112 type includes any one of following or appoints multinomial: frequency；Voltage；Voltage unbalance；Voltage harmonic；Voltage m-Acetyl chlorophosphonazo；It carries
Wave voltage；Voltage supplied deviation；Flickering；Active power；Reactive power.Record the instruction of data block first address 113 is first data
The address in channel information domain 112.
Then S2 is executed, corresponding recording head information 110 in electric system is extracted based on index information, finally solves new record
Specific markers domain 111 and data channel information domain 112 in head information 110.Wherein, index information include the date without hesitation information and
Time index information.Wherein it is preferred to which as shown in figure 3, the present invention can be believed based on date index information 210 and time index
Cease corresponding recording head information 110 in electric system described in 220 grading extractions, be classified parsing recording head information 110 in when
Mark domain 111 and data channel information domain 112.
Specifically, in the present embodiment, the index information that user submits is " 20 minutes and 35 seconds 23 points of on November 11st, 2015
Date index information 210 in voltage Vb " is " on November 11st, 2015 ", and time index information 220 is " 23: 35 20: ".
Fig. 3 shows the schematic diagram of hierarchical index mechanism, wherein date index information 210 includes that exact date 212 and time index are believed
The address 214 of breath, exact date 212 are " on November 11st, 2015 ".Therefore, when the index information that user submits is " 2015
When 23 points of 35 seconds 20 minutes voltage Vb " on the 11st in November, the exact date 212 for extracting date index information 210 is " 2015 11
Months 11 days " and match time index information " 23: 35 20: " address 214, then according to time index information " 23: 20
Points 35 seconds " address 214 specified time index information 220.Then, include in time index information 220 from one day 24
Hour from zero point until 23 points of recording head information address 221a ... 221z, wherein recording head information address 221a ...
221z has corresponded to specific record head 110a ... 110z.Therefore, right then according to time index information " 23: 35 20: "
The recording head information address answered should be 221z, and 221z corresponding specific record head in recording head information address should be 110z.
Further, the following steps in step S2 are executed: based on index information successively from record data block first address 113
Offset, to position the specific data in the corresponding record block message in the data channel information domain.As shown in Figure 1, in this implementation
In example, it is assumed that data channel information domain 1121 is voltage Va, and data channel information domain 1122 is voltage Vb, data channel information domain
1123 be voltage Vc, since the index information that user submits is " 23 points of 35 seconds 20 minutes voltage Vb on November 11st, 2015 ",
Need to find in the present embodiment is data channel information domain 1122.Therefore, record head is found based on above-mentioned index information first
Record data block first address 113 in information 110 deviates, i.e., data channel information domain 1121 is voltage Va.From data channel
Information field 1121 deviates certain digit to data channel information domain 1122, thus the corresponding note in location data channel information domain 1122
Record the specific data in block message 120.
Step S3 is finally executed, the data met in the record block message of index information are obtained.In the present embodiment, also
Be obtain meet without hesitation information " 23 points of 35 seconds 20 minutes voltage Vb on November 11st, 2015 " record block message 120 in it is specific
Data, the i.e. specific value of Vb.
Above-described embodiment is only illustrated with the specific data instance for obtaining a data channel information domain Vb, when needs are looked into
When asking multiple data channel information domains, such as need to inquire data channel information domain Vb and Vc, from data channel information domain 1121
It is displaced to data channel information domain 1122 and 1123.
It should be noted that it will be appreciated by those skilled in the art that executing step S2 again above to first carry out step S1
The description present invention, however, there is no exact sequences by above-mentioned steps S1 and step S2, it might even be possible to parallel to execute S1 and S2 to realize
The present invention.
Algorithm of the present invention is introduced below.
Firstly, the data for defining the Power Quality Detection obtained based on calculation method are a data channel information domain, and
By being expressed as (t, v) for each data channel information domain, wherein t is markers, and v is numeration evidence.Then, if electric energy quality monitoring
The data source set of index are as follows:
Ο={ oi| i=1 ... N }；
Record period set are as follows:
Ρ={ pi| i=1 ..., L },
Calculation method set are as follows:
Μ={ mi| i=1 ..., M },
Wherein N, L, M are respectively configurable data source, record period, calculation method total number.The record of user configuration
Period matrix are as follows:
Calculation method matrix are as follows:
Therefore, the information matrix in data channel information domain are as follows:
Wherein A and B is unitary matrice,And L0For the record period number of user configuration.Enable stIndicate that each data is logical
Road information field records the space size stored needed for markers, SvStorage needed for indicating each data channel information domain record content
Space size.General storage method is taken, primary all data channel information domains record total amount of data are as follows:
Wherein, based on the recording head information unit in data channel information domain are as follows:
(t, ΛOM, a)
Wherein, a indicates data block head address.Data block unit are as follows:
{vI, j, k|aI, j=1, bJ, k=1,1≤i≤L, 1≤j≤M, 1≤k≤N }
Enable SHThe space size of storage needed for indicating a record head based on data channel information domain, SBIt indicates based on number
Storage size needed for a record block according to channel information domain variable length model.SΛIndicate the letter in data channel information domain
Storage size needed for ceasing matrix, SaStorage size needed for indicating target address information, therefore, then primary note
The total amount of data of record are as follows:
With the primary all data channel information numeric field datas of electric energy quality monitoring mechanism of electric system provided by the invention
Record the data volume that can be saved are as follows:
Since data channel information domain information matrix is 0-1 times, it is required to reduce that bit storage can be used
Space size.By Tables 1 and 2 it is found that the sum of power quality data monitoring data classification is much larger than the note that user is configured
Record number of cycles, and when target memory space be greater than the memory space of address.With electric system provided by the invention
Although electric energy quality monitoring mechanism increases low volume data channel information, but greatly reduce the storage of redundancy time scale information,
To save a large amount of data space.
The recall precision based on markers hierarchical index mechanism is analyzed below.
If electric energy quality detection device data in storage medium total storage capacity is Y days, daily time index information is X
Item.According to markers hierarchical index mechanism, the maximum retrieval number that any moment data record needs to read from memory space is inquired
According to amount are as follows:
23≤X≤25, Pi∈{pj|pj∈ P, cj≠ 0, j=1 ..., L }
Wherein SDIndicate a date index information, ShIndicate a time index information.Therefore, any moment is inquired
Inquiry data volume needed for record is less and is substantially fixed, therefore search efficiency is efficient and stable.Because of storage
The access speed of medium is slow, and embedded equipment should reduce the operation to storage medium to the greatest extent.Due to date index information
Space it is smaller, it may be considered that be directly placed in Nonvolatile memory or device starting when be disposably loaded into memory.
When the date, index updated in memory, should be synchronously written into storage medium.
Second aspect of the present invention additionally provides the equipment for monitoring power quality 300 of electric system, wherein as shown in figure 4, electricity
Energy quality detection device 300 further includes inquiry unit 310, extracts resolver 320, acquisition device 330.Wherein, inquiry unit
310 for inquiring the monitoring record data in the electric system according to index information.Monitoring record data include record head letter
Block message is ceased and recorded, includes markers domain, data channel information domain and record data block first address in recording head information.Extract solution
Analysis apparatus 320 is used to extract corresponding recording head information in electric system based on index information, to parse in recording head information
Markers domain and data channel information domain.Acquisition device 330 is used to obtain the data met in the record block message of information without hesitation.
Specifically, index information includes time information and date index information without hesitation, wherein the extraction resolver
320 are also used to extract corresponding recording head information in electric system based on date index information and time index information grading.
Also, it extracts resolver 320 and is also used to be classified markers domain and the data channel information parsed in recording head information
Domain.
Further the extraction resolver 320 is also used to successively inclined from record data block first address based on index information
It moves, with the specific data in the corresponding record block message in location data channel information domain.
Wherein, inquiry unit 310 is for executing step S1 described above, and extracting resolver 320 is for executing
Step S2 described above, acquisition device 330 is for executing step S3 described above.As for specific algorithm also hereinbefore into
Detailed description is gone.It will be appreciated by those skilled in the art that the power quality prison for the electric system that second aspect of the present invention provides
The electric energy quality monitoring method for surveying the electric system of device and first aspect present invention offer corresponds, and the prior art has had
Mature software and hardware is supported, for simplicity, is repeated no more.
It is small in the substation operation 2 below using certain 110KV electric energy quality for substation monitoring index as data configuration position
When, 1 day, 1 month, respectively to the present invention and the prior art uncorrected data it is ordered storage, file system method power quality
The record data storage capacity and inquiry velocity of monitoring mechanism are made comparisons.Table 3 shows the electric energy quality for substation monitoring of the 110V
Data:
The electric energy quality monitoring data of 3 certain substation of table
Table 4 shows the data storage capacity of the electric energy quality monitoring mechanism of two kinds of electric system of the present invention and the prior art
Test result.
4 data storage capacity test result of table
As seen from the above table, the data storage capacity of the date storage method of above-mentioned four kinds of electric energy quality monitoring mechanism is with the time
It changes linearly.According to file system method, because data storage needs additional document storage management information, amount of storage
It is maximum.And the present invention, by being then based on the data model method of the variable length of data channel, data storage capacity is minimum.The present invention subtracts
The public records time scale information storage for having lacked redundancy, so overall data amount of storage is compared with the ordered storage method storage of data
A part of space can be saved.When the data channel stored in device is more, when public record period is more, with variable long number
Redundancy according to model reduction is also more, and storage efficiency is higher.
Table 5 shows the monitoring record number of the electric energy quality monitoring mechanism of two kinds of electric system of the present invention and the prior art
It is investigated that asking efficiency test result.
5 monitoring record efficiency data query test result of table
The query rate value of upper table is the Voltage unbalance inquired in last 1 hour of moment, the 25th voltage harmonic, the 25th
The retrieval time average value of primary current harmonic wave and short flickering.As shown in Table 5, using method III, the data of certain amount of storage are remembered
Record is inquired, data access efficiency highest.With the accumulation of storage time, the storage file generated in file system is increasingly
More, the efficiency of file management can be declined slightly, but search efficiency is still very high.According to the ordered storage method of uncorrected data, by
In the ordered of retrieval data, data access efficiency is lower rapidly with becoming larger for amount of storage.
In conclusion the data storage and management efficiency highest of Power Quality Detection mechanism of the invention, and stability
It is best.
It is discussed in detail although the contents of the present invention have passed through above preferred embodiment, but it should be appreciated that above-mentioned
Description is not considered as limitation of the present invention.After those skilled in the art have read above content, for of the invention
A variety of modifications and substitutions all will be apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
In addition, any reference signs in the claims should not be construed as limiting the involved claims；One word of " comprising " is not excluded for
Unlisted device or step in other claims or specification；The words such as " first ", " second " are only used to indicate names, and
It does not indicate any particular order.
Claims (16)
1. the electric energy quality monitoring method of electric system, wherein include the following steps:
The monitoring record data (100) in the electric system, monitoring record data (100) packet are inquired according to index information
Recording head information (110) and record block message (120) are included, includes markers domain (111), data in the recording head information (110)
Channel information domain (112) and record data block first address (113)；
Corresponding recording head information (110) in the electric system is extracted based on index information, to parse recording head information (110)
In markers domain (111) and data channel information domain (112)；
Obtain the data met in the record block message (120) of the index information.
2. the electric energy quality monitoring method of electric system according to claim 1, which is characterized in that the index information packet
Include date information (210) and time index information (220) without hesitation, wherein the extraction step further include:
It is based on recording accordingly in electric system described in date index information (210) and time index information (220) grading extraction
Head information (110).
3. the electric energy quality monitoring method of electric system according to claim 1, which is characterized in that the index information packet
Include date information (210) and time index information (220) without hesitation, wherein the analyzing step further include:
Markers domain (111) and data channel information domain (112) in classification parsing recording head information (110).
4. the electric energy quality monitoring method of electric system according to claim 1, which is characterized in that obtaining described in satisfaction
Before data in the record block message (120) of index information, further includes:
It is successively deviated from the record data block first address (113) based on the index information, to position the data channel letter
Cease the specific data in domain (112) corresponding record block message (120).
5. the electric energy quality monitoring method of electric system according to claim 1, it is characterised in that: data described in each
Channel information domain (112) is (t, v), and wherein t is markers, and v is data,
Data source collection is combined into Ο={ oi| i=1 ... N }, record period collection is combined into Ρ={ pi| i=1 ..., L }, calculation method collection
It is combined into Μ={ mi| i=1 ..., M }.
6. the electric energy quality monitoring method of electric system according to claim 5, which is characterized in that the data channel letter
Cease the information matrix Λ of domain (112)CAre as follows:
Wherein, A and B is unitary matrice,L0For the record period number of user configuration, L is of configurable record period
Number.
7. the electric energy quality monitoring method of electric system according to claim 6, which is characterized in that acquired meets institute
State the data v in the record block message (120) of index informationi,j,kAre as follows:
{vi,j,k|ai,j=1, bj,k=1,1≤i≤L, 1≤j≤M, 1≤k≤N },
8. the electric energy quality monitoring method of electric system according to claim 1, which is characterized in that the data channel letter
The type of breath domain (112) includes any one of following or appoints multinomial:
Frequency；
Voltage；
Voltage unbalance；
Voltage harmonic；
Voltage m-Acetyl chlorophosphonazo；
Carrier voltage；
Voltage supplied deviation；
Flickering；
Active power；
Reactive power.
9. the equipment for monitoring power quality of electric system, wherein include:
Inquiry unit (310), the monitoring record data (100) for being used to be inquired according to index information in the electric system, institute
It states monitoring record data (100) to include recording head information (110) and record block message (120), in the recording head information (110)
Including markers domain (111), data channel information domain (112) and record data block first address (113)；
It extracts resolver (320), is used to extract corresponding recording head information in the electric system based on index information
(110), to parse the markers domain (111) and data channel information domain (112) in recording head information (110)；
Acquisition device (330) is used to obtain the data met in the record block message (120) of index information.
10. the equipment for monitoring power quality of electric system according to claim 9, which is characterized in that the index information
Including time information (210) and date index information (220) without hesitation, wherein the extraction resolver is also used to:
It is based on recording accordingly in electric system described in date index information (210) and time index information (220) grading extraction
Head information (110).
11. the equipment for monitoring power quality of electric system according to claim 9, which is characterized in that the index information
Including time information (210) and date index information (220) without hesitation, wherein the extraction resolver is also used to:
Markers domain (111) and data channel information domain (112) in classification parsing recording head information (110).
12. the equipment for monitoring power quality of electric system according to claim 9, which is characterized in that the extraction parsing
Device is also used to:
It is successively deviated from the record data block first address (113) based on the index information, to position the data channel letter
Cease the specific data in domain (112) corresponding record block message (120).
13. the equipment for monitoring power quality of electric system according to claim 9, it is characterised in that: number described in each
It is (t, v) according to channel information domain (112), wherein t is markers, and v is data,
Data source collection is combined into Ο={ oi| i=1 ... N }, record period collection is combined into Ρ={ pi| i=1 ..., L }, calculation method collection
It is combined into Μ={ mi| i=1 ..., M }.
14. the equipment for monitoring power quality of electric system according to claim 13, which is characterized in that the data channel
The information matrix Λ of information field (112)CAre as follows:
Wherein, A and B is unitary matrice,L0For the record period number of user configuration, L is of configurable record period
Number.
15. the equipment for monitoring power quality of electric system according to claim 14, which is characterized in that the acquisition device
(330) it is specifically used for obtaining the data v for meeting following conditioni,j,kAre as follows:
{vi,j,k|ai,j=1, bj, k=1,1≤i≤L, 1≤j≤M, 1≤k≤N },
16. the equipment for monitoring power quality of electric system according to claim 9, which is characterized in that the data channel
The type of information field (112) includes any one of following or appoints multinomial:
Frequency；
Voltage；
Voltage unbalance；
Voltage harmonic；
Voltage m-Acetyl chlorophosphonazo；
Carrier voltage；
Voltage supplied deviation；
Flickering；
Active power；
Reactive power.
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| 基于PQDIF的改进型电能质量数据交换模型及其实现;张涛;《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》;20080430;C042-143 |
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