CN110175002B - Real-time section saving method and device for power distribution network and computer medium - Google Patents
Real-time section saving method and device for power distribution network and computer medium Download PDFInfo
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- CN110175002B CN110175002B CN201910607768.8A CN201910607768A CN110175002B CN 110175002 B CN110175002 B CN 110175002B CN 201910607768 A CN201910607768 A CN 201910607768A CN 110175002 B CN110175002 B CN 110175002B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0602—Interfaces specially adapted for storage systems specifically adapted to achieve a particular effect
- G06F3/0608—Saving storage space on storage systems
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0602—Interfaces specially adapted for storage systems specifically adapted to achieve a particular effect
- G06F3/061—Improving I/O performance
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0628—Interfaces specially adapted for storage systems making use of a particular technique
- G06F3/0655—Vertical data movement, i.e. input-output transfer; data movement between one or more hosts and one or more storage devices
- G06F3/0656—Data buffering arrangements
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q10/00—Administration; Management
- G06Q10/20—Administration of product repair or maintenance
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q50/00—Systems or methods specially adapted for specific business sectors, e.g. utilities or tourism
- G06Q50/06—Electricity, gas or water supply
Abstract
The invention discloses a real-time section storage method, which comprises the following steps: s1: establishing a section cache area according to the network scale and the size of a computer memory, wherein the section cache area is used for storing the real-time sections of the power distribution network at different moments; s2: and dynamically managing the real-time section in the section cache region according to the life cycle of the fault of the power distribution network, and only keeping the effective real-time section. The real-time sections of the power distribution network at equal time intervals are automatically cached, and time marks and fault reference counting attributes are recorded for each section; and then, according to the life cycle of the faults occurring in real time in the power distribution network, establishing references from the faults to real-time sections, automatically maintaining the fault reference counts of the real-time sections, and automatically filtering invalid sections according to the time marks and the fault reference counts of the sections, so that the time-scale-variable real-time section storage of the power distribution network, which is efficient and meets the real-time processing requirements of multiple faults, is realized.
Description
Technical Field
The present invention relates to the field of power system automation, and more particularly, to a method, an apparatus, and a computer medium for real-time section preservation for a power distribution network.
Background
Faults occurring in the power distribution network are the main reasons for power failure of users. Meanwhile, the distribution network is large in scale, complex in wiring and wide in coverage area, the probability of coexistence of multiple faults in different feeders and places in the distribution network is high, the faults can occur at the same time or different times, the processing process of each fault needs to be continued for a period of time, and particularly for the faults occurring on the feeders without the closed-loop automatic control condition, the fault processing duration is long because the fault processing process needs some manual operations. When each fault is positioned, isolated and recovered, the normal operation state of the whole power distribution network before the fault occurs and close to the fault occurrence time needs to be known so as to ensure the positioning accuracy and the reasonability and the safety of the isolation and recovery scheme, and when the fault signal is detected and the section is started again for storage, the normal operation state of the power distribution network before the fault cannot be stored, so that the real-time operation section of the power distribution network in a period of time needs to be continuously stored when the fault does not occur. Moreover, to ensure the efficiency of fault analysis and processing, these real-time sections need to be stored in a memory bank. Under a certain ground state power flow, a transmission line in which the directions of active power flows presented in the power system are completely consistent and distances between different electric appliances are basically similar is called a transmission section.
In a common practice, a system needs to automatically, continuously and periodically store a real-time section sequence of a power distribution network, and then find out a real-time section before a fault occurs from the stored real-time section sequence according to the occurrence time of the fault to be processed. However, when multiple faults exist in the distribution network, if the real-time section storage period is too large, the problem that the stored real-time section data is far from the data when the faults actually occur may exist; if the real-time section storage period is too small, the problems of huge occupied memory, low retrieval efficiency and difficulty in storing a complete real-time section for multiple faults with long processing time span exist.
In fact, for handling multiple faults, it is only necessary to obtain a real-time section when each fault occurs (before the fault occurs but close to the time of the fault), and for section data when no fault occurs, it is not necessary to save it. Therefore, how to design a reasonable real-time section storage scheme and a section management method aiming at the practical application scene of the multiple fault processing of the power distribution network reduces the real-time section storage space and the retrieval time, and is very important for improving the processing capacity and the efficiency of the multiple faults of the power distribution network.
Disclosure of Invention
The invention aims to provide a real-time section storage method for a power distribution network, which meets the real-time processing requirement of multiple faults and greatly compresses a variable-time-scale power distribution network operation section storage scheme of a storage space.
It is a further object of the present invention to provide a real-time section preservation apparatus for a power distribution network.
It is a third object of the present invention to provide a computer medium for an electrical distribution network.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a real-time section storage method for a power distribution network comprises the following steps:
s1: establishing a section cache area according to the network scale and the size of a computer memory, wherein the section cache area is used for storing the real-time sections of the power distribution network at different moments;
s2: and dynamically managing the real-time section in the section cache region according to the life cycle of the fault of the power distribution network, and only keeping the effective real-time section.
Preferably, the section cache area is a memory area including n continuous blocks, where each block stores a real-time section at a time.
Preferably, each block stores a real-time section at a moment, wherein the real-time section comprises a section time mark, fault reference times and section data of the real-time section, and the section time mark records time corresponding to the section data; recording the number of faults currently associated with the section by the number of fault reference times; and the section data records the power grid operation data of the current section, including data related to remote sensing remote signaling and the operation condition of the power distribution network.
Preferably, the respective real-time slices are stored in the slice cache in a hashed manner, not necessarily in a chronological manner.
Preferably, step S2 specifically includes the following steps:
s2.1: continuously and periodically storing the real-time sections of the power distribution network at the current moment to available positions in a section cache area, wherein an initial section set in the section cache area is recorded as a set { A };
s2.2: when a fault F occurs, finding out a related real-time section Af from the set { A } according to the occurrence time of the fault F, establishing a reference from the fault F to the real-time section Af, and adding 1 to the fault reference count of the real-time section Af;
s2.3: after the fault F is processed, removing the reference from the fault F to the real-time section Af, and simultaneously subtracting 1 from the fault reference count of the real-time section Af;
s2.4: when the fault reference count of a certain section in the set { A } is 0 and the section time mark exceeds the set caching duration, the section is removed from the caching area { A }, the vacant position can be used for a new caching section, and the section set after an invalid section is filtered out, which is called as an effective section set { B }.
Preferably, during the processing of the fault F, the real-time section corresponding to the fault can be directly located in the section cache region by referring the fault F to the real-time section Af.
Preferably, the period of step S2.1 is 5 minutes.
Preferably, the buffering duration set in step S2.4 is 5 minutes.
A real-time section preservation apparatus for a power distribution network, comprising:
the storage is used for storing the real-time sections of the power distribution network at different moments;
and the processor operates the memory to realize any one of the real-time section storage methods for the power distribution network.
A computer medium for an electrical distribution network, the computer medium having a computer program stored thereon, the computer medium, when executed by a processor, implementing any of the above real-time section preservation methods for an electrical distribution network.
Compared with the prior art, the technical scheme of the invention has the beneficial effects that:
the real-time sections of the power distribution network at equal time intervals are automatically cached, and time marks and fault reference counting attributes are recorded for each section; and then, according to the life cycle of the faults occurring in real time in the power distribution network, establishing references from the faults to real-time sections, automatically maintaining the fault reference counts of the real-time sections, and automatically filtering invalid sections according to the time marks and the fault reference counts of the sections, so that the time-scale-variable real-time section storage of the power distribution network, which is efficient and meets the real-time processing requirements of multiple faults, is realized.
Drawings
FIG. 1 is a schematic flow chart of the present invention.
FIG. 2 is a schematic cross-sectional storage structure of the present invention.
FIG. 3 is a schematic diagram of a section buffer after a fault occurs according to the present invention.
FIG. 4 is a schematic diagram of a section buffer after partial fault processing is completed according to the present invention.
FIG. 5 is a schematic diagram of the apparatus of the present invention.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the patent;
for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product;
it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The technical solution of the present invention is further described below with reference to the accompanying drawings and examples.
Example 1
A real-time section preservation method for a power distribution network, as shown in fig. 1, includes the following steps:
s1: establishing a section cache area according to the network scale and the size of a computer memory, wherein the section cache area is used for storing the real-time sections of the power distribution network at different moments;
s2: and dynamically managing the real-time section in the section cache region according to the life cycle of the fault of the power distribution network, and only keeping the effective real-time section.
The section cache region is a memory region comprising n continuous blocks, wherein each block stores a real-time section at one moment.
Each block stores a real-time section at a moment, wherein the real-time section comprises a section time mark, fault reference times and section data of the real-time section, and the section time mark records time corresponding to the section data; recording the number of faults currently associated with the section by the number of fault reference times; and the section data records the power grid operation data of the current section, including data related to remote sensing remote signaling and the operation condition of the power distribution network.
The real-time sections are stored in the section cache in a hashed manner, not necessarily in a time-sequential manner.
Step S2 specifically includes the following steps:
s2.1: continuously and periodically storing the real-time sections of the power distribution network at the current moment to available positions in a section cache area, wherein an initial section set in the section cache area is recorded as a set { A };
s2.2: when a fault F occurs, finding out a related real-time section Af from the set { A } according to the occurrence time of the fault F, establishing a reference from the fault F to the real-time section Af, and adding 1 to the fault reference count of the real-time section Af;
s2.3: after the fault F is processed, removing the reference from the fault F to the real-time section Af, and simultaneously subtracting 1 from the fault reference count of the real-time section Af;
s2.4: when the fault reference count of a certain section in the set { A } is 0 and the section time mark exceeds the set caching duration, the section is removed from the caching area { A }, the vacant position can be used for a new caching section, and the section set after an invalid section is filtered out, which is called as an effective section set { B }.
In the process of processing the fault F, the real-time section corresponding to the fault can be directly positioned in the section cache region through the reference from the fault F to the real-time section Af.
The period of step S2.1 is 5 minutes.
The buffering duration set in step S2.4 is 5 minutes.
In a specific implementation process, a power distribution network section cache area as shown in fig. 2 is established: the continuous n rectangular blocks in the upper row in the figure show that the created section cache area can store n real-time sections at most, wherein each rectangular block represents a storage position of one section, the rectangular blocks filled with dark colors represent that the position stores an effective real-time section, and the rectangular blocks filled with no dark colors represent that the position does not have an effective section and can be used for caching a new section. For each valid section (corresponding position of the dark filled rectangular block), the section time scale, the fault reference count and the specific section data are saved.
The system firstly automatically, continuously and periodically caches the current real-time section of the power distribution network to a section cache region. Taking 5 minutes as a periodic buffer interval as an example for explanation, assuming three moments of 55 minutes and 0 seconds at 9 days of 2019.02.16, 0 minutes and 0 seconds at 10 days of 2019.02.16 and 0 minutes and 0 seconds at 10 days of 2019.02.16 and 5 minutes and 0 seconds at 10 days of 2019.02.16, the system automatically and continuously stores 3 real-time sections of the power distribution network to a section buffer area, and stores three positions 1, i and m in the section buffer area according to the available conditions of all the positions of the section buffer area at that time, the time scales of the three sections are 20190216095500, 20190216100000 and 20190216100500 respectively, the initial fault reference counts are all 0, and the three sections are respectively marked as C1, Ci and Cm.
Meanwhile, two faults are detected to occur in the power distribution network when the faults are 2019.02.16, 9, 55 minutes, 5 seconds, 100 milliseconds and 2019.02.16, 9, 55 minutes, 5 seconds and 300 milliseconds respectively, and are marked as faults F1 and F2 respectively; another fault was detected at 2019.02.16 day 10, 5 minutes, 6 seconds, 300 milliseconds, and is denoted as fault F3. Establishing references from the faults F1 and F2 to the fault C1 according to the occurrence time of the 3 faults and the time marks of each fault in the fault cache region, and simultaneously increasing the reference count of the fault C1 to 2; a reference to fault F3 to profile Cm is established with the fault reference count for profile Cm increasing to 1. In the case of the profile buffer at this time, as shown in fig. 3, the fault reference counts of the profiles C1, Ci, and Cm are 2, 0, and 1, respectively.
If the faults F1 and F3 are processed at 2019.02.16, 10, 9, min 5 sec and 2019.02.16, 10, 12, min 15 sec, respectively, the reference from the fault F1 to the section C1 and the reference from the fault F3 to the section Cm are released, the fault reference counts of the sections C1 and Cm are respectively reduced by 1, and the fault reference counts of the sections C1, Ci and Cm are respectively 1, 0 and 0. For the sections Ci and Cm with the fault reference count value of 0, after the fault guidance count value is kept at 0 for exceeding the set buffer time, the sections Ci and Cm are automatically cleared from the section buffer area, i.e. the i and m positions can be reused for buffering a new real-time section, and the section C1 at the position 1 needs to be kept because of the fault reference (referred by the fault F2), and is not released until the fault F2 is processed. At this time, the recording condition of the corresponding section buffer is as shown in fig. 4.
Example 2
The embodiment provides a real-time section storage device for a power distribution network, as shown in fig. 5, which includes a memory for storing real-time sections of the power distribution network at different times;
and the processor operates the memory to realize the real-time section storage method for the power distribution network in the embodiment.
Example 3
A computer medium for a power distribution network, the computer medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the real-time section preservation method for the power distribution network according to any of the above embodiments.
The same or similar reference numerals correspond to the same or similar parts;
the terms describing positional relationships in the drawings are for illustrative purposes only and are not to be construed as limiting the patent;
it should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (6)
1. A real-time section storage method for a power distribution network is characterized by comprising the following steps:
s1: establishing a section cache area according to the network scale and the size of a computer memory, wherein the section cache area is used for storing the real-time sections of the power distribution network at different moments;
s2: according to the life cycle of the fault of the power distribution network, dynamically managing the real-time sections in the section cache region, and only keeping effective real-time sections;
the section cache region is a memory region comprising n continuous blocks, wherein each block stores a real-time section at one moment;
each block stores a real-time section at a moment, wherein the real-time section comprises a section time mark, fault reference times and section data of the real-time section, and the section time mark records time corresponding to the section data; recording the number of faults currently associated with the section by the number of fault reference times; the section data records the power grid operation data of the current section, including data related to remote sensing remote signaling and the operation condition of the power distribution network;
each real-time section is stored in the section cache region in a hash mode;
step S2 specifically includes the following steps:
s2.1: continuously and periodically storing the real-time sections of the power distribution network at the current moment to available positions in a section cache area, wherein an initial section set in the section cache area is recorded as a set { A };
s2.2: when a fault F occurs, finding out a related real-time section Af from the set { A } according to the occurrence time of the fault F, establishing a reference from the fault F to the real-time section Af, and adding 1 to the fault reference count of the real-time section Af;
s2.3: after the fault F is processed, removing the reference from the fault F to the real-time section Af, and simultaneously subtracting 1 from the fault reference count of the real-time section Af;
s2.4: when the fault reference count of a certain section in the set { A } is 0 and the section time mark exceeds the set caching duration, the section is removed from the caching area { A }, the vacant position can be used for a new caching section, and the section set after an invalid section is filtered out, which is called as an effective section set { B }.
2. The method for storing the real-time sections of the power distribution network according to claim 1, wherein during the processing of the fault F, the real-time section corresponding to the fault can be directly located in the section cache area through the reference from the fault F to the real-time section Af.
3. The method according to claim 1, wherein the period of step S2.1 is 5 minutes.
4. The method according to claim 1, wherein the buffering duration set in step S2.4 is 5 minutes.
5. The utility model provides a real-time section save equipment for distribution network which characterized in that includes:
the storage is used for storing the real-time sections of the power distribution network at different moments;
a processor operating on the memory to implement the real-time section preservation method of any one of claims 1 to 4.
6. A computer medium for a power distribution network, the computer medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the real-time section preservation method of any one of claims 1 to 4.
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| CN106451463A (en) * | 2016-11-09 | 2017-02-22 | 广东电网有限责任公司珠海供电局 | A method and apparatus for analyzing a thermal-stable section in a ring network system |
| CN108874859A (en) * | 2018-04-17 | 2018-11-23 | 中国电力科学研究院有限公司 | It is a kind of to dispatch real-time profile data generation method and system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104242259B (en) * | 2014-06-16 | 2017-05-10 | 北京四方继保自动化股份有限公司 | Fault section increment storage method for power distribution network |
| CN107025344B (en) * | 2017-04-01 | 2020-12-18 | 内蒙古电力(集团)有限责任公司培训中心 | Power distribution automation simulation system and simulation method for power distribution DTS |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106451463A (en) * | 2016-11-09 | 2017-02-22 | 广东电网有限责任公司珠海供电局 | A method and apparatus for analyzing a thermal-stable section in a ring network system |
| CN108874859A (en) * | 2018-04-17 | 2018-11-23 | 中国电力科学研究院有限公司 | It is a kind of to dispatch real-time profile data generation method and system |
| CN109711450A (en) * | 2018-12-20 | 2019-05-03 | 北京科东电力控制系统有限责任公司 | A kind of power grid forecast failure collection prediction technique, device, electronic equipment and storage medium |
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