CN107942848A - A kind of method that fault set determines - Google Patents
A kind of method that fault set determines Download PDFInfo
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- CN107942848A CN107942848A CN201710936478.9A CN201710936478A CN107942848A CN 107942848 A CN107942848 A CN 107942848A CN 201710936478 A CN201710936478 A CN 201710936478A CN 107942848 A CN107942848 A CN 107942848A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/048—Monitoring; Safety
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- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The present invention relates to a kind of method that fault set determines, system mode is ranked up the process employs performance indicator, effectively solve the deficiency for not considering status fault probability risk in the prior art, realize the high efficiency of screening electric system typical fault, beneficial reference is provided for Electric Power Network Planning.
Description
Technical field
The present invention relates to a kind of method that fault set determines.
Background technology
With the rapid growth of electric load, the interconnection of regional power grid, the progressively construction of power supply and power grid, the calculating of power grid
Scale constantly increase is, it is necessary to consider cascading failure and the fault set under special operating environment.And fault set it is given more
It is general only to consider N-1 and with bar circuit with randomness.Therefore, can be to electricity when searching for potential risk of disturbance collection automatically
Net carries out subregion, to avoid the search and analysis to harmless multiple forecast failure, on the one hand can improve fault set generation and
The efficiency of corresponding analysis, on the other hand can mitigate workload and increase accuracy.
The content of the invention
In view of this, the present invention provides a kind of method that fault set determines, it is therefore intended that mitigates the work of mode personnel
Amount, it is ensured that accuracy, and improve the generation of fault set and the efficiency of corresponding analysis.
Technical scheme is as follows：
The method that this fault set determines, step are as follows：
（1）Initial data is read in, the typical operation method of electric system is determined, enumerates an event of failure；
（2）According to mentioned above principle, each piecemeal faulty section is formed, deletion and insertion operation using tree, after establishing fault recovery
Distribution network topological structure；
（3）Distribution situation according to front and rear trend is cut-off determines the main domain of influence that anticipation is cut-off；
（4）System mode is ranked up based on performance indicator；
（5）Check whether event of failure is enumerated to finish, if not complete, turn to step（2）；
（6）The reliability index of each load point, each feeder line and whole distribution system is formed, and exports result of calculation, is system
Operation, management and planning department and user provide reference.
Beneficial effects of the present invention include：
1）Partitioning algorithm based on node different from the past, it is contemplated that subregion during accident analysis should be directed to branch and carry out.Subregion
Should ensure that influence of the failure to area's external equipment in an area almost can be ignored, so the failure in a certain area into
Avoid the need for, to carrying out analysis calculating outside area, improving the efficiency of algorithm during row analysis.
2）Generally there is preferable linear relationship between effective power flow, local linearization effect is preferable, and calculation error is smaller, therefore
The relation between effective power flow before and after linearization approximate expression power grid forecast failure can be passed through.
3）The N-2 fault sets that need to be paid close attention to are generated, and integrating parallel calculates the risk assessment meter for carrying out actual large scale electric network
Calculate, can preferably be ensured in calculated performance.
4）The investigation of fault set is carried out based on consequence, i.e., for possible potential failure of having a power failure on a large scale, considers cascading failure,
To investigate out possible fault set, this method not yet refers in Chinese and foreign documents.
Brief description of the drawings
In order to illustrate more clearly of the technical solution in the embodiment of the present application, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present application, for
For those of ordinary skill in the art, without having to pay creative labor, it can also be obtained according to these attached drawings
His attached drawing.
Fig. 1 is flow chart of the method for the present invention.
Fig. 2 is the schematic diagram at automatic fault collection interface.
Embodiment
The present invention will be further described below in conjunction with the accompanying drawings.
The method that this fault set determines, step are as follows：
（1）Initial data is read in, the typical operation method of electric system is determined, enumerates an event of failure；
（2）According to mentioned above principle, each piecemeal faulty section is formed, deletion and insertion operation using tree, after establishing fault recovery
Distribution network topological structure；
（3）Distribution situation according to front and rear trend is cut-off determines the main domain of influence that anticipation is cut-off；
（4）System mode is ranked up based on performance indicator；
（5）Check whether event of failure is enumerated to finish, if not complete, turn to step（2）；
（6）The reliability index of each load point, each feeder line and whole distribution system is formed, and exports result of calculation, is system
Operation, management and planning department and user provide reference.
Step 1. establishes the node branch connected graph of electrical island, any spanning tree of the figure is then searched for, as base
The single chord circuit of plinth generation, and then there will be the circuit of common edge to merge into a subregion, these torus partitionings are propped up accordingly
Removed in Lu Congtu, remaining radial branch then carries out subregion by connective.
Step 2. passes through the relation between effective power flow before and after linearization approximate expression power grid forecast failure.For parallel running
Circuit or paired running main transformer, its effective power flow distribution determined by device parameter, between the effective power flow of each equipment in approximation
Linear relationship, in power grid monitoring with can only consider in control as a free variable, is defined as equipment group here.
When generation is cut-off in anticipation, the effective power flow of each equipment will redistribute in power grid, it is contemplated that cut-off front and rear trend
Change and the position cut-off of anticipation and to cut-off preceding trend related.When anticipation, which is cut-off, betides a certain equipment group, the equipment group
Some will be transmitted effective power flow by the surplus equipment in equipment group, and another part then will transfer to miscellaneous equipment group.
Step 3. first carries out N-1 contingency analysis.Cut-off for each N-1, first can be according to cut-offfing front and rear trend
Distribution situation determine the main domain of influence cut-off of anticipation.Only focus on and cut-off the branch that rear trend substantially becomes larger.Branch Power Flow is
The no power flow transfer coefficient significantly increased after being cut-off according to equipment, and reference arm short-time overload capacity is with cut-offfing preceding branch tide
The ratio-dependent of stream.
One bulk power grid may be decomposed into one or several larger subregions by step 4. when carrying out subregion to actual electric network
With many small subregions, for big subregion, the scale of its N-2 fault set may be still larger, it is therefore necessary into traveling one
The decomposition of step, with the fault set of fast filtering safety, and the emphasis of concern is positioned detailed to the need there may be safety problem
The failure of analysis.
There is no two overlapping N-1 to cut-off for the failure domain of influence, if the two equipment are cut-off at the same time, its consequence can be with
It is approximately the linear superposition that two N-1 cut-off consequence, can not pays close attention to.Therefore only need to according to the domains of influence of N-1 failures whether
It is overlapping, you can the N-2 fault sets that generation need to be paid close attention to.Further, it is possible to consider according to the domains of influence of N-m failures and N-1 failures
The domain of influence generates N-（m+1）Fault set.
Content described in this specification embodiment is only enumerating to the way of realization of inventive concept, protection of the invention
Scope is not construed as being only limitted to the concrete form that embodiment is stated, protection scope of the present invention also includes art technology
Personnel conceive according to the present invention it is conceivable that equivalent technologies mean.
Claims (3)
1. a kind of method that fault set determines, it is characterized in that：Step is as follows：
（1）Initial data is read in, the typical operation method of electric system is determined, enumerates an event of failure；
（2）According to mentioned above principle, each piecemeal faulty section is formed, deletion and insertion operation using tree, after establishing fault recovery
Distribution network topological structure；
（3）Distribution situation according to front and rear trend is cut-off determines the main domain of influence that anticipation is cut-off；
（4）System mode is ranked up based on performance indicator；
（5）Check whether event of failure is enumerated to finish, if not complete, turn to step（2）；
（6）The reliability index of each load point, each feeder line and whole distribution system is formed, and exports result of calculation, is system
Operation, management and planning department and user provide reference.
2. the method that fault set according to claim 1 determines, it is characterized in that subregion thinking can effectively filter many not
Need the multiple failure paid close attention to（Harmless or consequence can approximately linear superposition situation）, improve computational efficiency.
3. the method that fault set according to claim 1 determines, it is characterized in that adoption status enumerative technique, for specifying trend
Section, system can carry out topological subregion, and the positively related branch combinations of the trouble-shooting domain of influence in same subregion automatically,
Form automatic fault collection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710936478.9A CN107942848A (en) | 2017-10-10 | 2017-10-10 | A kind of method that fault set determines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710936478.9A CN107942848A (en) | 2017-10-10 | 2017-10-10 | A kind of method that fault set determines |
Publications (1)
| Publication Number | Publication Date |
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| CN107942848A true CN107942848A (en) | 2018-04-20 |
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| CN201710936478.9A Withdrawn CN107942848A (en) | 2017-10-10 | 2017-10-10 | A kind of method that fault set determines |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103942731A (en) * | 2014-04-21 | 2014-07-23 | 国家电网公司 | Power grid anticipated fault set automatic generating method and system |
| CN104092210A (en) * | 2014-07-14 | 2014-10-08 | 国家电网公司 | Online static security analysis method with N-2 opening rapid scanning function |
| CN106451444A (en) * | 2016-11-30 | 2017-02-22 | 云南电网有限责任公司 | Power grid cascading failure accident chain searching method considering about load shedding and coupling |
-
2017
- 2017-10-10 CN CN201710936478.9A patent/CN107942848A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103942731A (en) * | 2014-04-21 | 2014-07-23 | 国家电网公司 | Power grid anticipated fault set automatic generating method and system |
| CN104092210A (en) * | 2014-07-14 | 2014-10-08 | 国家电网公司 | Online static security analysis method with N-2 opening rapid scanning function |
| CN106451444A (en) * | 2016-11-30 | 2017-02-22 | 云南电网有限责任公司 | Power grid cascading failure accident chain searching method considering about load shedding and coupling |
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Application publication date: 20180420 |