CN103633643B - A kind of based on the Analysis of Short-Circuit Current method for limiting reviewed - Google Patents
A kind of based on the Analysis of Short-Circuit Current method for limiting reviewed Download PDFInfo
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- CN103633643B CN103633643B CN201310548825.2A CN201310548825A CN103633643B CN 103633643 B CN103633643 B CN 103633643B CN 201310548825 A CN201310548825 A CN 201310548825A CN 103633643 B CN103633643 B CN 103633643B
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Abstract
The present invention is a kind of based on the Analysis of Short-Circuit Current method for limiting reviewed.1) the short circuit current measuring and calculating under the full start-up mode of electrical network is carried out；2) short circuit current drawing the high website of short circuit current follows the trail of figure；3) website high to short circuit currenti, pass through websitejShort circuit current correlation coefficient therewith (is defined as websiteiShort circuit current tracking figure in obtain pass through websitejShort circuit current account for websiteiThe ratio of short circuit current), analyze other websitesjThe dependency of short circuit current therewith；4) the several crucial website needing to take measures is found out by the dependency of short circuit current；5) critical station is pressed short circuit current size to be ranked up；6) according to short circuit current correlation coefficient, and system risk, via net loss, power flowcontrol etc. consider, and determine place and size that suitable measures for limiting short-circuit current implements；7) recalculate the short circuit current of system each point, again the crucial website that next short circuit current is excessive taken measures, repeat step 5), 6), if there is no the excessive website of short circuit current, terminate.The method of the present invention realizes convenient, may be used for the analysis to bulk power grid complexity short circuit current restricted problem and Measure choice.
Description
Technical field
The present invention proposes a kind of based on the Analysis of Short-Circuit Current method for limiting reviewed, belong to large-scale mutually
The innovative technology of connection power system.
Technical background
Along with the expansion of power system scale, system grid power constantly increases, short circuit current water
Putting down and increase the most accordingly, safe stability of power system problem is more and more important.In giving electrical network simultaneously
Various electric equipments, as the bus of chopper, transformator, transformer and transformer station, framework,
Wire and supporting porcelain vase etc. propose harsher requirement, therefore, limit Power System Shortcuts
Electric current becomes a problem demanding prompt solution.
From the point of view of Guangdong Province, the load of Guangdong Power Grid tracking in recent years is continued for high speed development, electricity
Source and electric network composition are strengthened the most rapidly.Guangdong 500kV electrical network was sent out with double speed between 5 years
Exhibition, and 500kV Key Substation wiring concentration, main transformer number of units is many, thus short circuit current level is relatively
High.Meanwhile, the absolute structure of 500kV electrical network is weaker, and exists between 220kV electrical network
The weak electromagnetic looped network of part, on the one hand limit 500kV electrical network by power, the most also
The capacity of short circuit causing relevant plant stand increases to jeopardize the degree of equipment safety.
The measure of limiting short-circuit current can be from electric network composition, system operation mode and equipment performance
From the standpoint of three.Short circuit current exceeds standard and divides exceeding standard of indivedual place tight with regional short circuit current
?.Measure targetedly is taked to be relatively easy to solve for the former；For the latter, may be
Electric network composition generation great change, main force's plant-grid connection or target net project study go out
Existing, traditional method is directly to take measures in the website near region that short circuit current is high, short circuit current
The reasonability of restriction effect and measure is difficult to ensure that, actually needs to review short circuit current, even
Until mains side, to understand the composition of short circuit current lucidly, then take the most comprehensive, rationally
Measure.
Summary of the invention
It is an object of the invention to propose a kind of clear physical concept, the convenient base of Project Realization
In the Analysis of Short-Circuit Current method for limiting reviewed.The method that the present invention proposes, reviews short circuit current
Until mains side, understand the composition of short circuit current lucidly, the shortest by analyzing other websites
The dependency of road electric current, takes for effective measures for crucial website, and method is motivated,
May be used for the analysis to bulk power grid complexity short circuit current restricted problem and Measure choice.
The present invention based on the Analysis of Short-Circuit Current method for limiting reviewed, comprise the steps:
1) the short circuit current measuring and calculating under the full start-up mode of electrical network is carried out；
2) short circuit current drawing the high website of short circuit current follows the trail of figure；
3) the website i high to short circuit current, by website j short circuit current correlation coefficient therewith
(short circuit current by website j being defined as in the short circuit current tracking figure of website i obtaining accounts for
The ratio of website i short circuit current), analyze the dependency of other websites j short circuit current therewith
4) the several crucial website needing to take measures is found out by the dependency of short circuit current；
5) critical station is pressed short circuit current size to be ranked up；
6) according to short circuit current correlation coefficient, and system risk, via net loss, power flowcontrol
Etc. considering, determine place and size that suitable measures for limiting short-circuit current implements；
7) short circuit current of system each point is recalculated, again excessive to next short circuit current
Crucial website takes measures, repeat step 5), 6), if there is no the excessive website of short circuit current,
Terminate.
Above-mentioned short circuit current correlation coefficient index follows the trail of figure, Ke Yifen according to the short circuit current of website
Analyse the dependency of other websites short circuit current therewith, analyze each point tribute to this website short circuit current
Degree of offering, provides foundation for choosing short circuit current measure below.
The crucial website index comprehensive that above-mentioned short circuit current limits considers short circuit current and exceeds standard or connect
Nearly limit value is zonal, and takes the measures for limiting short-circuit current for crucial website,
Can effectively solve the problem that region short circuit current is excessive, it is to avoid short circuit current takes measures effect not
Substantially or not comprehensively problem.
Place and the size selection aspect of above-mentioned short-circuit current limiting measure consider short circuit current and chase after
Track calculated short circuit current dependency.
Short circuit current exceeds standard and is divided into exceeding standard and regional short circuit current anxiety of indivedual website.At present,
Measure targetedly is taked to be relatively easy to solve for the former；For the latter, may be at electrical network
Structure generation great change, main force's plant-grid connection, the short circuit of load density growth region electrical network entirety
Occurring in electric current anxiety or target net project study, traditional method is directly in short circuit
The website near region that electric current is high takes measures, and the reasonability of short circuit current restriction effect and measure is difficult to
Ensure.The present invention proposes a kind of to analyze limiting short-circuit current based on what grid short circuit electric current was reviewed
Method, reviews short circuit current until mains side, understands the composition of short circuit current the most lucidly,
Specify the direction of short circuit current, thus can analyze the relevant of other websites short circuit current therewith
Property, distinguish crucial website to be taken measures, take for effectively arranging for crucial website
Executing, method is motivated, and Project Realization is convenient, may be used for bulk power grid complexity short circuit current
The analysis of restricted problem and Measure choice.
Accompanying drawing explanation
Fig. 1 is the flow chart of the inventive method application.
Detailed description of the invention
Referring to the drawings 1, the application to this method is described in detail: technical scheme
Comprise the steps:
1) carry out the short circuit current measuring and calculating under the full start-up mode of electrical network, short circuit current be ranked up,
Obtain short circuit current exceed standard or approach the website of circuit breaker interrupting capacity (such as 90% open circuit
Device rupturing capacity) set.
2), based on the short circuit current tracking function in PSS/E software, short circuit current is drawn high
Website short circuit current follow the trail of figure.
3) website high to short circuit current, analyzes the dependency of other websites short circuit current therewith.
4) dependency between the website that short circuit current is high, the set of sites high to short circuit current are analyzed
Conjunction carries out classification polymerization, can find out the several crucial website needing to take measures.
5) critical station is pressed short circuit current size to be ranked up.
6) for the crucial website i that short circuit current is higher, suitable measures for limiting short-circuit current is determined
The place implemented and size.
7) short circuit current of system each point is recalculated, if there is the critical station that short circuit current is excessive
Point, repeats 5,6) step.
8) terminate.
Above-mentioned steps 3) in, the website i high to short circuit current, analyzes other websites the shortest
The dependency of road electric current, is followed the trail of in figure by the short circuit current of website i, obtains by website j
Short circuit current account for the ratio of website i short circuit current and (be defined herein as short circuit current phase relation
Number), judge the website j short circuit current contribution degree to website i by the size of this coefficient.Tool
Body calculates each branch, short-circuit current absolute value sum Iij, and the short-circuit current value I of website iSi,
Website j is R to the short circuit current correlation coefficient of website iij=Iij/(2×ISi)。
Above-mentioned steps 4) in, find out the several crucial website needing to take measures, crucial website
Definition need to take measures respectively for each region the short circuit current relatively high station of limiting short-circuit current
Point.The method taking to get rid of non-key website, specifically comprises the following steps that for short circuit current higher
In website i and j, if RijAnd RjiThe highest, then it is assumed that website i and the phase of j short circuit current
Cross correlation is relatively strong, take measures can only for a website, as relatively low in short circuit current not
As crucial website；If RijHigher but RjiRelatively low, then should mainly website j be taken measures,
Website i is not as crucial website；If RijAnd RjiThe most relatively low, then the short circuit current of two websites
Constituting dependency low, need to take measures respectively, the dependency of the two website cannot function as row
Foundation except crucial website.
Above-mentioned steps 6) in, for the crucial website i that short circuit current is higher, according to other stations
The dependency size of some short circuit current therewith, chooses the ground that several measures for limiting short-circuit current is implemented
Point (prioritizing selection power plant end), tentatively makees with the electrical distance or impedance increasing website and i
For measure, limiting short-circuit current to desired value, and consider system risk, via net loss,
The factors such as power flowcontrol, determine place and size that suitable measures for limiting short-circuit current implements.
Claims (2)
1. one kind based on the Analysis of Short-Circuit Current method for limiting reviewed, it is characterised in that comprise the steps:
1) the short circuit current measuring and calculating under the full start-up mode of electrical network is carried out；
2) short circuit current drawing the high website of short circuit current follows the trail of figure；
3) website to short circuit currenti, pass through websitejShort circuit current correlation coefficient therewith, this correlation coefficient is defined as websiteiShort circuit current tracking figure in obtain pass through websitejShort circuit current account for websiteiThe ratio of short circuit current, analyzes other websitesjThe dependency of short circuit current therewith
4) the crucial website needing to take measures is found out by the dependency of short circuit current；
5) critical station is pressed short circuit current size to be ranked up；
6) according to short circuit current correlation coefficient, and system risk, via net loss, power flowcontrol consider, and determine place and size that measures for limiting short-circuit current implements；
7) recalculate the short circuit current of system each point, again the crucial website that next short circuit current is excessive taken measures, repeat step 5), 6), if there is no the excessive website of short circuit current, terminate；Above-mentioned short circuit current correlation coefficient index follows the trail of figure according to the short circuit current of website, analyzes the dependency of other websites short circuit current therewith, analyzes each point contribution degree to this website short circuit current, provides foundation for choosing short circuit current measure below.
The most according to claim 1 based on the Analysis of Short-Circuit Current method for limiting reviewed, it is characterised in that place and the size selection aspect of above-mentioned short-circuit current limiting measure consider the short circuit current dependency that short circuit current tracing computation obtains.
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| CN201310548825.2A CN103633643B (en) | 2013-11-06 | 2013-11-06 | A kind of based on the Analysis of Short-Circuit Current method for limiting reviewed |
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| CN201310548825.2A CN103633643B (en) | 2013-11-06 | 2013-11-06 | A kind of based on the Analysis of Short-Circuit Current method for limiting reviewed |
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| CN103633643A CN103633643A (en) | 2014-03-12 |
| CN103633643B true CN103633643B (en) | 2016-10-05 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101930491A (en) * | 2010-08-18 | 2010-12-29 | 华北电力大学 | Method for comprehensively evaluating measures for limiting short-circuit current |
| CN102738780A (en) * | 2012-06-28 | 2012-10-17 | 河海大学 | Method of optimal configuration of superconducting fault current limiter based on sensitivity technology |
| CN103199551A (en) * | 2013-03-13 | 2013-07-10 | 南方电网科学研究院有限责任公司 | Stationing and parameter optimization method of syntony-type fault current limiter |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4044512B2 (en) * | 2003-11-12 | 2008-02-06 | 三菱電機株式会社 | Power system stabilization control device and power system stabilization control method |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101930491A (en) * | 2010-08-18 | 2010-12-29 | 华北电力大学 | Method for comprehensively evaluating measures for limiting short-circuit current |
| CN102738780A (en) * | 2012-06-28 | 2012-10-17 | 河海大学 | Method of optimal configuration of superconducting fault current limiter based on sensitivity technology |
| CN103199551A (en) * | 2013-03-13 | 2013-07-10 | 南方电网科学研究院有限责任公司 | Stationing and parameter optimization method of syntony-type fault current limiter |
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