CN106645868A - Short-circuit current scanning method and device - Google Patents
Short-circuit current scanning method and device Download PDFInfo
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- CN106645868A CN106645868A CN201611010272.5A CN201611010272A CN106645868A CN 106645868 A CN106645868 A CN 106645868A CN 201611010272 A CN201611010272 A CN 201611010272A CN 106645868 A CN106645868 A CN 106645868A
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- circuit current
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
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- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Locating Faults (AREA)
Abstract
The present invention provides a short-circuit current scanning method and device, relates to the field of power system analysis, the calculating speed can be increased, and the scanning time of the short-circuit current can be reduced. The concrete scheme of the short-circuit current scanning method comprises that a host maps a calculating task for scanning the short-circuit current through the network to a graphics processing unit (GPU); the GPU determines the fault type of each fault point in the network and the short-circuit current through each fault point in the network in dependence on fault information of the calculating task received from the host; the GPU returns the scanning result of the short-circuit current to the host; and the scanning result comprises the fault type of each fault point in the network and the short-circuit current through each fault point in the network. The short-circuit current scanning method and device are used for scanning short-circuit current.
Description
Technical field
Embodiments of the invention are related to Power System Analysis field, more particularly to a kind of scan method and dress of short circuit current
Put.
Background technology
Calculation of short-circuit current is electrical equipment selection, the premise of electic protection adaptive setting, is Power System Planning, design
With the important foundation of operation.Electrical-magnetic model based on power system carries out calculation of short-circuit current can accurately be tied
Really, but calculating speed is excessively slow, and calculation scale is restricted, it is impossible to meet engineering demand.For many years, many scholars
It is devoted to always finding an equilibrium point between the calculating accuracy and ease for use of short circuit current.
Development and interconnection scale enlargement with electrical network, the scale of electrical network is increasing, and the amount of calculation of short circuit current scanning is more next
It is bigger.In recent years, as the requirement to operation of power networks increasingly becomes more meticulous, the real-time analysis and online check to electrical network just seems
It is particularly important, so the rate request also more and more higher to analyzing electrical network.
The calculating speed of short circuit current scanning is improved, the speed of Power System Analysis will necessarily be improved.Therefore how to improve
The calculating speed of short circuit current scanning, becomes the hot issue of a research and development.
The content of the invention
Embodiments of the invention provide a kind of scan method and device of short circuit current, it is possible to increase calculating speed, shorten
The sweep time of short circuit current, beneficial to the speed for improving Power System Analysis.
In order to reach above-mentioned purpose, embodiments herein is adopted the following technical scheme that：
A kind of first aspect, there is provided scan method of short circuit current, including：
Main frame will be mapped in graphic process unit GPU to the calculating task that network internal short-circuit electric current is scanned；
GPU determines each trouble point in network according to the fault message of the calculating task received from the main frame
Fault type and short circuit current；
The scanning result of short circuit current is returned to the main frame by GPU；The scanning result includes each failure in network
The fault type and short circuit current of point.
Second aspect, there is provided the scan method device of a kind of short circuit current, for performing the method that first aspect is provided.
The scan method and device of the short circuit current that embodiments of the invention are provided, by what is be scanned to short circuit current
Calculating task is mapped in GPU and carries out, and the calculating time than scanning short circuit current in prior art is shorter, so as to shorten short circuit
The sweep time of electric current, beneficial to the speed for improving Power System Analysis.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, embodiment will be described below
Needed for the accompanying drawing to be used be briefly described, it should be apparent that, drawings in the following description be only the present invention some
Embodiment, for those of ordinary skill in the art, on the premise of not paying creative work, can be with attached according to these
Figure obtains other accompanying drawings.
The scan method schematic flow sheet of the short circuit current that Fig. 1 is provided by embodiments of the invention；
The scanning means structural representation of the short circuit current that Fig. 2 is provided by embodiments of the invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than the embodiment of whole.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Embodiment
Multi-core central processing unit (English full name of the parallel computing from earliest Distributed Calculation development finally：
Central Processing Unit, English abbreviation：CPU), then to the graphic process unit for quickly growing in recent years (English is complete
Claim：Graphics Processing Unit, English abbreviation：GPU), it is relatively ripe.GPU has low cost, and height calculates effect
The advantage of rate, so it is more and more significant in the status of calculating field.It is tall and handsome that up to the universal parallel released calculating framework, (English is complete
Claim：Compute Unified Device Architecture, English abbreviation：CUDA) so that GPU solves complicated calculating and asks
Topic can give full play to its advantage.
It is an object of the present invention to provide a kind of more rapidly efficient scan method and device to short circuit current, utilizes
GPU realizes in a parallel fashion the calculating in short circuit current scanning process, so as to improve the speed that short circuit current scanning is calculated.With reference to
Shown in Fig. 1, the scan method of the short circuit current that embodiments of the invention are provided is comprised the following steps：
101st, main frame will be mapped in GPU to the calculating task that network internal short-circuit electric current is scanned.
Framework CUDA is calculated based on universal parallel, the duty mapping of the calculating being scanned to network internal short-circuit electric current is arrived
GPU。
The short-circuit impedance for solving short dot that it is critical only that of short circuit current is solved, calculating task includes clicking through each failure
The fault message of row short circuit current scanning, including the short-circuit impedance of short dot etc..
For mininet, it is possible to use the method such as star-triangular transformation carries out abbreviation to network, eliminate in addition to short dot
All nodes, obtain system-wide Single port equivalent impedance, as corresponding short-circuit impedance.
For baroque catenet, total system bus admittance matrix should be obtained first, then to node admittance
Matrix carries out LDU decomposition, solves finally according to trouble point information back substitution, so just can obtain the corresponding short-circuit impedance of short dot.Respectively
The back substitution of individual trouble point short-circuit impedance does not interfere with each other between solving, therefore available parallelism is calculated and realized.
Assume there is n node, Y in networkn×nIt is the bus admittance matrix of the network, LDU decomposition is carried out to it, obtains：
Yn×n=LDU 〃
If wanting the short circuit current of calculate node i, set:
B={ 010 }
The i-th -1 i-th i+1 item
It is vectorial that solution equation below obtains X:
Yn×nX=b
Further obtain the short-circuit impedance Z of i-nodei,SC:
Zi,SC=XI-th
According to above-mentioned principle, when short circuit current is scanned the duty mapping for calculating to GPU, it is assumed that have m failure in network
Node, then need m thread, one trouble point of each thread process.
102nd, GPU determines the fault type and short circuit current of each trouble point network Nei.
The number of the trouble point in network can have one or more than.Calculating task is mapped to after GPU, and GPU is exhaustive
All trouble points in network, according to the fault message of the calculating task received from main frame, determine each trouble point in network
Fault type and short circuit current.
In a kind of specific embodiment, GPU is believed in parallel computation mode according to the failure of each trouble point in network
Breath, calculates the fault type and short circuit current for determining each trouble point.With reference to step 101, m malfunctioning node correspondence in network
M thread, each thread synchronization is carried out in GPU, first judges the type of trouble point handled by the thread, and further calculates short circuit
Electric current.Until exhaustive all malfunctioning nodes, short circuit current scanning is completed.
103rd, the scanning result of short circuit current is returned to main frame by GPU.
Scanning result includes the fault type and short circuit current of each trouble point in network.
The scan method of the short circuit current that embodiments of the invention are provided, the calculating being scanned to short circuit current is appointed
Business is mapped in GPU and carries out, and the calculating time than scanning short circuit current in prior art is shorter, so as to shorten short circuit current
Sweep time, beneficial to the speed for improving Power System Analysis.Further, realize that short circuit current is swept based on CUDA parallel computations
Retouch so that GPU can give full play to its advantage during complicated calculations are solved the problems, such as, with enforceability is strong, speed is fast
Advantage.
Embodiments of the invention also provide a kind of scanning means of short circuit current, for performing described in above-described embodiment
Short circuit current scan method, with reference to shown in Fig. 2, scanning means includes control unit 101 and graphic process unit GPU102.
Control unit 101, for will be mapped in GPU102 to the calculating task that network internal short-circuit electric current is scanned.
GPU102, the fault message of the calculating task received from control unit 101 for basis determines in network each
The fault type and short circuit current of trouble point.
GPU102, is additionally operable to for the scanning result of short circuit current to return to main frame.Scanning result includes each event in network
The fault type and short circuit current of barrier point.
Optionally, control unit 101, based on universal parallel framework CUDA is calculated, and network internal short-circuit electric current will be swept
The duty mapping of the calculating retouched is to GPU102.
Optionally, GPU102, in parallel computation mode, according to the fault message of each trouble point in network, calculates and determines
The fault type and short circuit current of each trouble point.
The scanning means of the short circuit current that embodiments of the invention are provided, the calculating being scanned to short circuit current is appointed
Business is mapped in GPU and carries out, and the calculating time than scanning short circuit current in prior art is shorter, so as to shorten short circuit current
Sweep time, beneficial to the speed for improving Power System Analysis.Further, realize that short circuit current is swept based on CUDA parallel computations
Retouch so that GPU can give full play to its advantage during complicated calculations are solved the problems, such as, with enforceability is strong, speed is fast
Advantage.
More than, the only specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, any to be familiar with
Those skilled in the art the invention discloses technical scope in, change or replacement can be readily occurred in, all should cover
Within protection scope of the present invention.Therefore, protection scope of the present invention should be defined by scope of the claims.
Claims (6)
1. a kind of scan method of short circuit current, it is characterised in that include：
Main frame will be mapped in graphic process unit GPU to the calculating task that network internal short-circuit electric current is scanned；
GPU determines the event of each trouble point network Nei according to the fault message of the calculating task received from the main frame
Barrier type and short circuit current；
The scanning result of short circuit current is returned to the main frame by GPU；The scanning result includes each trouble point in network
Fault type and short circuit current.
2. scan method according to claim 1, it is characterised in that described network internal short-circuit electric current to be scanned
Calculating task is mapped in graphic process unit GPU, including：
Framework CUDA is calculated based on universal parallel, by the duty mapping of the calculating being scanned to network internal short-circuit electric current to GPU.
3. scan method according to claim 2, it is characterised in that the GPU is according to the institute received from the main frame
The fault message of calculating task is stated, the fault type and short circuit current of each trouble point network Nei is determined, including：
GPU, according to the fault message of each trouble point in network, calculates the failure for determining each trouble point in parallel computation mode
Type and short circuit current.
4. a kind of scanning means of short circuit current, it is characterised in that include：Control unit and graphic process unit GPU；
Described control unit, for will be mapped in the GPU to the calculating task that network internal short-circuit electric current is scanned；
The GPU, the fault message of the calculating task received from described control unit for basis determines each in network
The fault type and short circuit current of individual trouble point；
The GPU, is additionally operable to for the scanning result of short circuit current to return to the main frame；The scanning result includes each in network
The fault type and short circuit current of individual trouble point.
5. scanning means according to claim 4, it is characterised in that
Described control unit, calculates framework CUDA, by the calculating being scanned to network internal short-circuit electric current based on universal parallel
Duty mapping is to GPU.
6. scanning means according to claim 5, it is characterised in that
The GPU, in parallel computation mode, according to the fault message of each trouble point in network, calculates and determines each trouble point
Fault type and short circuit current.
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| CN201611010272.5A CN106645868A (en) | 2016-11-16 | 2016-11-16 | Short-circuit current scanning method and device |
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| CN201611010272.5A CN106645868A (en) | 2016-11-16 | 2016-11-16 | Short-circuit current scanning method and device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107679011A (en) * | 2017-09-27 | 2018-02-09 | 南方电网科学研究院有限责任公司 | The scan method and device of a kind of harmonic impedance |
| CN107741528A (en) * | 2017-11-17 | 2018-02-27 | 南方电网科学研究院有限责任公司 | Power system broken string impedance scan method and apparatus |
| CN108762909A (en) * | 2018-06-01 | 2018-11-06 | 南方电网科学研究院有限责任公司 | The short circuit current scanning system and method for electric power networks |
| CN110783897A (en) * | 2019-09-25 | 2020-02-11 | 北京交通大学 | GPU acceleration-based power grid short-circuit current parallel computing method and system |
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|---|---|---|---|---|
| CN107679011A (en) * | 2017-09-27 | 2018-02-09 | 南方电网科学研究院有限责任公司 | The scan method and device of a kind of harmonic impedance |
| CN107741528A (en) * | 2017-11-17 | 2018-02-27 | 南方电网科学研究院有限责任公司 | Power system broken string impedance scan method and apparatus |
| CN107741528B (en) * | 2017-11-17 | 2019-12-27 | 南方电网科学研究院有限责任公司 | Method and device for scanning broken line impedance of power system |
| CN108762909A (en) * | 2018-06-01 | 2018-11-06 | 南方电网科学研究院有限责任公司 | The short circuit current scanning system and method for electric power networks |
| CN110783897A (en) * | 2019-09-25 | 2020-02-11 | 北京交通大学 | GPU acceleration-based power grid short-circuit current parallel computing method and system |
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