CN104901263B - A kind of branch coefficient calculation method of power system adaptive setting - Google Patents
A kind of branch coefficient calculation method of power system adaptive setting Download PDFInfo
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- CN104901263B CN104901263B CN201510249936.2A CN201510249936A CN104901263B CN 104901263 B CN104901263 B CN 104901263B CN 201510249936 A CN201510249936 A CN 201510249936A CN 104901263 B CN104901263 B CN 104901263B
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Abstract
The invention discloses a kind of branch coefficient calculation method of power system adaptive setting, and it can carry out simplifying calculating to braning factor, greatly improves the efficiency of adaptive setting work.The method comprising the steps of：(I) using circuit where adjusting protection as research object, to adjust protection dorsal part bus as starting point, to adjust protection to side bus as terminal, terminal is pointed to using starting point and carries out topology search as positive direction；(II) it is positive integer to define series M, M, to search for series less than or equal to M as constraints, by search out it is all positive direction can be pressed by find the loop of terminal be defined as fundamental circuit；(III) branch road in fundamental circuit is taken turns into inspection set as N k to be overhauled, and calculates the braning factor under current maintenance mode；(IV) braning factor under all N k modes, the underlying parameter that screening extreme value is applied as adaptive setting are calculated.
Description
Technical field
The invention belongs to the technical field of power system adaptive setting, more particularly to a kind of power system adaptive setting
Branch coefficient calculation method.
Background technology
During relay protection fixed value setting calculates, to meet the selectivity of relay protection, it is necessary to consider in the various operations of power network
Back-up protection under mode coordinates, braning factor as protective seletion important setting parameter, it is necessary to carry out under various modes
Braning factor calculate, choose extreme value carry out definite value setting value order.The difficulty for thus calculating braning factor is various operations
The consideration of mode, traditional braning factor, which calculates, considers that outlet of the protection to side bus makees N-1 wheel inspection or in defined offside
And make N-k (k=1,2,3 ...) wheel inspections in dorsal part series, substantial amounts of maintenance mode causes the low and substantial amounts of of computational efficiency
Data redundancy, and simple offside N-1 modes are possible to miss the extreme method of operation, so as to cause braning factor not to be pole
Value.
In summary, the calculating of braning factor is a high-volume calculation of fault problem in relay protection setting calculation, its
The correct judgement of calculating speed and branch road maintenance mode governs the efficiency of fixed value adjusting evaluation work.
The content of the invention
The technology of the present invention solves problem：Overcome the deficiencies in the prior art, there is provided a kind of power system adaptive setting
Branch coefficient calculation method, it can carry out simplifying calculating to braning factor, greatly improve the efficiency of adaptive setting work.
The present invention technical solution be：The branch coefficient calculation method of this power system adaptive setting, this method
Comprise the following steps：
(I) using circuit where adjusting protection as research object, to adjust protection dorsal part bus as starting point, protected with adjusting
Shield, as terminal, points to terminal using starting point and carries out topology search as positive direction to side bus；
(II) it is positive integer to define series M, M, to search for series less than or equal to M as constraints, the institute that will be searched out
Have to press positive direction by and find the loop of terminal and be defined as fundamental circuit；
(III) branch road in fundamental circuit is taken turns into inspection set as N-k to be overhauled, and calculated under current maintenance mode
Braning factor, wherein N refer to bus and connect circuitry number, and K refers to the circuitry number for needing to overhaul；
(IV) braning factor under all N-k modes, the underlying parameter that screening extreme value is applied as adaptive setting are calculated.
The branch coefficient calculation method of another power system adaptive setting is additionally provided, this method comprises the following steps：
(1) start；
(2) research object and loop positive direction are determined；
(3) loop traversal is carried out with the series M of setting；
(4) determine the branch road in fundamental circuit as wheel inspection branch road collection；
(5) ith N-k maintenance in branch road collection is overhauled；
(6) judge whether to meet operation constraint, if it is perform step (7), otherwise perform step (5)；
(7) braning factor under present branch maintenance mode is calculated；
(8) judge whether to complete all maintenance, be then to perform step (9), otherwise perform step (5)；
(9) complete.
This method will protect all fundamental circuits of the dorsal part bus to protection to side bus using oriented topology search technology
Traveled through, based on fundamental circuit, with reference to operation constraint is adjusted, the circuit in loop is subjected to N-k maintenance, therefore can
Braning factor is carried out to simplify calculating, greatly improves the efficiency of adaptive setting work.
Brief description of the drawings
Fig. 1 shows that one of the branch coefficient calculation method of the power system adaptive setting according to the present invention is preferable to carry out
The flow chart of example.
Embodiment
The branch coefficient calculation method of this power system adaptive setting, this method comprise the following steps：
(I) using circuit where adjusting protection as research object, to adjust protection dorsal part bus as starting point, protected with adjusting
Shield, as terminal, points to terminal using starting point and carries out topology search as positive direction to side bus；
(II) it is positive integer to define series M, M, to search for series less than or equal to M as constraints, the institute that will be searched out
Have to press positive direction by and find the loop of terminal and be defined as fundamental circuit；
(III) branch road in fundamental circuit is taken turns into inspection set as N-k to be overhauled, and calculated under current maintenance mode
Braning factor, wherein N refer to bus and connect circuitry number, and K refers to the circuitry number for needing to overhaul；
(IV) braning factor under all N-k modes, the underlying parameter that screening extreme value is applied as adaptive setting are calculated.
As shown in figure 1, additionally providing the branch coefficient calculation method of another power system adaptive setting, this method includes
Following steps：
(1) start；
(2) research object and loop positive direction are determined；
(3) loop traversal is carried out with the series M of setting；
(4) determine the branch road in fundamental circuit as wheel inspection branch road collection；
(5) ith N-k maintenance in branch road collection is overhauled；
(6) judge whether to meet operation constraint, if it is perform step (7), otherwise perform step (5)；
(7) braning factor under present branch maintenance mode is calculated；
(8) judge whether to complete all maintenance, be then to perform step (9), otherwise perform step (5)；
(9) complete.
This method will protect all fundamental circuits of the dorsal part bus to protection to side bus using oriented topology search technology
Traveled through, based on fundamental circuit, with reference to operation constraint is adjusted, the circuit in loop is subjected to N-k maintenance, therefore can
Braning factor is carried out to simplify calculating, greatly improves the efficiency of adaptive setting work.
The present invention is applied to relay protection setting calculation field, using based on oriented topological loop method search technique, solution
Line mode process problem during certainly braning factor calculates, invalid data is reduced, improve the computational efficiency of braning factor.Relay protection
During fixed value adjusting calculates, to meet the selectivity of relay protection, it is necessary to consider the back-up protection under the various methods of operation of power network
Coordinate, braning factor calculates as the important setting parameter of protective seletion, it is necessary to carry out the braning factor under various modes, choosing
Extreme value is taken to carry out the setting value order of definite value.The difficulty for thus calculating braning factor is the consideration of the various methods of operation, traditional
Braning factor, which calculates, considers that outlet of the protection to side bus makees N-1 wheel inspection or make N-k in defined offside and dorsal part series
The inspection of (k=1,2,3 ...) wheel, substantial amounts of maintenance mode cause the low and substantial amounts of data redundancy of computational efficiency, and simple
Offside N-1 modes are possible to miss the extreme method of operation again, so as to cause braning factor not to be extreme value.The present invention proposes one
Branch coefficient calculation method of the kind based on oriented topological loop, dorsal part bus will be protected to protection using oriented topology search technology
All fundamental circuits to side bus travel through, based on fundamental circuit, with reference to operation constraint is adjusted, by the line in loop
Road carries out N-k maintenance, and that realizes braning factor simplifies calculating.
It is described above, be only presently preferred embodiments of the present invention, any formal limitation not made to the present invention, it is every according to
Any simple modification, equivalent change and modification made according to the technical spirit of the present invention to above example, still belong to the present invention
The protection domain of technical scheme.
Claims (1)
- A kind of 1. branch coefficient calculation method of power system adaptive setting, it is characterised in that：This method comprises the following steps：(I) using circuit where adjusting protection as research object, to adjust protection dorsal part bus as starting point, to adjust protection pair Side bus points to terminal using starting point and carries out topology search as positive direction as terminal；(II) it is positive integer to define series M, M, to search for series less than or equal to M as constraints, all energy that will be searched out Positive direction is pressed by find the loop of terminal and be defined as fundamental circuit；(III) branch road in fundamental circuit is taken turns into inspection set as N-k to be overhauled, and calculates the branch under current maintenance mode Coefficient, wherein N refer to bus and connect circuitry number, and K refers to the circuitry number for needing to overhaul；(IV) braning factor under all N-k modes, the underlying parameter that screening extreme value is applied as adaptive setting are calculated.
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| CN201510249936.2A CN104901263B (en) | 2015-05-15 | 2015-05-15 | A kind of branch coefficient calculation method of power system adaptive setting |
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| CN104901263B true CN104901263B (en) | 2017-12-29 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102969692A (en) * | 2012-12-12 | 2013-03-13 | 四川省电力公司 | Branch coefficient calculation method based on real-time data of power grid |
| CN104319748A (en) * | 2014-10-13 | 2015-01-28 | 清华大学 | Quick adjustment method for parallel line branching factor in substation area distance protection section III |
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2015
- 2015-05-15 CN CN201510249936.2A patent/CN104901263B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102969692A (en) * | 2012-12-12 | 2013-03-13 | 四川省电力公司 | Branch coefficient calculation method based on real-time data of power grid |
| CN104319748A (en) * | 2014-10-13 | 2015-01-28 | 清华大学 | Quick adjustment method for parallel line branching factor in substation area distance protection section III |
Non-Patent Citations (1)
| Title |
|---|
| 继电保护运行整定中计算分支系数的快速方法;李冰灯;《继电器》;20040101;第32卷(第1期);21-23,27 * |
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