CN104836190B - A kind of relay protection setting calculation method of power plant electric system - Google Patents
A kind of relay protection setting calculation method of power plant electric system Download PDFInfo
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- CN104836190B CN104836190B CN201510244269.9A CN201510244269A CN104836190B CN 104836190 B CN104836190 B CN 104836190B CN 201510244269 A CN201510244269 A CN 201510244269A CN 104836190 B CN104836190 B CN 104836190B
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- relay protection
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Abstract
The invention discloses a kind of computerized algorithms of the relay protection setting calculation of power plant electric system; when using computerized algorithm; electric network model (the primary connection relationships of electric power networks) is needed to be converted into the mathematical model of electric power networks; the method of generally use is the whole electric network model of conversion, and the present invention is using only transform portion electric network model.Which greatly reduce the sizes of loading mathematical model, reduce the dimension of node admittance battle array, shorten the time of matrix inversion, greatly accelerate arithmetic speed.The relay protection setting calculation method of this power plant electric system; this method loads electric network model according to the upward load layer in position of fault branch; electric network model is not loaded with for the equipment of same layer or a low load layer, electric network model is all loaded for main electrical scheme part.
Description
Technical field
The invention belongs to the technical field of electric system adaptive setting, more particularly to a kind of power plant electric system after
Electric protection synchronizing calculation method.
Background technology
For a long time, factory's net integration operation, power plant relay protection management are calculated with fixed value adjusting always by mutually powered-down
Net protection profession is responsible for, so power plant is to the calculation of fault of relay protection profession is analyzed, fixed value adjusting calculates and management work weight
Visual range degree is inadequate, causes after separating the factory and network, and relay protection profession in power plant becomes a weak link.
At present, in transmission line of electricity adaptive setting all using software is adjusted, the rapidity and accuracy calculated obtains general
Time accreditation.And shortcoming is also compared in the work in terms of power plant protection seting, most of power plant still uses artificial hand computation
Mode carry out fault analysis and protection and adjust, epoch that this and computer nowadays rapidly develop are not suitable with.
Now power plant is modeled, carries out setting parameter calculating.Since power plant is mainly made of three digest journals, fire coal system
System, boiler circuit and electrical system.When modeling, electrical system is called main electrical scheme part, coal burning system and carbonated drink system
It is referred to as the loaded portion of power plant.Each part is made of many mini systems, wherein combustion system include fuel system,
Boiler combustion system, dedusting ash disposal system and ventilating system；Boiler circuit includes water supply system, cooling water system and moisturizing system
System；Electrical system includes turbine control system, Auxiliary Power Control System, directly sends out circuit or boosting transformation stand control
System.Therefore, the electric parameter of power plant is numerous and complicated, and calculating process is obviously also extremely complex.It is born in one power plant
Lotus layer is more, and with the increase of load layer, and number of nodes sharply increases during calculation of fault, for computer, causes very
Big workload.
Invention content
The technology of the present invention solves the problems, such as：Overcome the deficiencies of the prior art and provide a kind of power plant electric system after
Electric protection synchronizing calculation method, which greatly reduce the sizes of loading electric network model, reduce the dimension of node admittance battle array, shorten
Time of matrix inversion, greatly accelerate arithmetic speed.
The present invention technical solution be：The relay protection setting calculation method of this power plant electric system, the party
Method loads electric network model according to the upward load layer in position of fault branch, for the equipment of same layer or a low load layer
Electric network model is not loaded with, electric network model is all loaded for main electrical scheme part.
This method loads electric network model according to the upward load layer in fault branch position, and same layer or low one are born
For the equipment of lotus layer, impedance value and the method for operation will not have an impact result of calculation, so not needing to load this part electricity
Pessimistic concurrency control all loads main electrical scheme part.Due to when calculating, first having to generation bus admittance matrix, then to admittance
Node impedance matrix is obtained after matrix inversion, because being related to a large amount of calculating operation to inverting for matrix, with the increase of number of nodes
Its used time exponentially rising of inverting, the operation of number of nodes is reduced by loading section electric network model, greatly reduces loading mould
The size of type reduces the dimension of node admittance battle array, shortens the time of matrix inversion, greatly accelerates arithmetic speed.
Description of the drawings
Fig. 1 shows the flow chart of the relay protection setting calculation method of power plant electric system according to the present invention；
Fig. 2 shows the primary connection figures of certain power plant.
Specific embodiment
The relay protection setting calculation method of this power plant electric system, this method are upward according to the position of fault branch
One load layer loads electric network model, and electric network model is not loaded with for the equipment of same layer or a low load layer, and master is connect
Line part all loads electric network model.
This method loads electric network model according to the upward load layer in fault branch position, and same layer or low one are born
For the equipment of lotus layer, impedance value and the method for operation will not have an impact result of calculation, so not needing to load this part electricity
Pessimistic concurrency control all loads main electrical scheme part.Due to when calculating, first having to generation bus admittance matrix, then to admittance
Node impedance matrix is obtained after matrix inversion, because being related to a large amount of calculating operation to inverting for matrix, with the increase of number of nodes
Its used time exponentially rising of inverting, the operation of number of nodes is reduced by loading section electric network model, greatly reduces loading electricity
The size of pessimistic concurrency control reduces the dimension of node admittance battle array, shortens the time of matrix inversion, greatly accelerates operation speed
Degree.
Preferably, as shown in Figure 1, this method includes the following steps：
(1) start；
(2) fault branch is determined；
(3) judge whether the fault branch is located in the range of main electrical scheme, if it is perform step (6), otherwise perform step
Suddenly (4)；
(4) using the busbar as starting point, upper level busbar is checked；
(5) judge whether upper level busbar is located in the range of main electrical scheme, if it is perform step (6), otherwise perform step
Suddenly (4)；
(6) whole electric network models of main wiring diagram are loaded；
(7) mathematical model generation is completed.
A specific embodiment is given below.The primary connection figure of certain power plant as shown in Figure 2 is omitted in figure
The loaded portion of 6kV1B, 6kV2A and 6kV2B and defeated coal PC1 sections and 400V defeated coal PC2 sections of PC sections of 400V steam turbines, 400V's
Loaded portion.As failure is happened at PC sections of 400V steam turbines, then the higher level's busbar for finding trouble point upwards is 6kV1A sections, mother
PC sections of line 400V steam turbines and the change of 1# steam turbines are loaded into and calculate in mathematical model, because 6kV1A sections of busbar is the main wiring diagram of power plant,
The mathematical model directly main wiring diagram all loaded with regard to being this calculating is no longer searched upwards, then the number of final loading
It learns model and removes dotted portion for attached drawing 2.
The above is only presently preferred embodiments of the present invention, not makees limitation in any form to the present invention, it is every according to
According to any simple modification, equivalent change and modification that the technical spirit of the present invention makees above example, still belong to the present invention
The protection domain of technical solution.
Claims (2)
- A kind of 1. relay protection setting calculation method of power plant electric system, it is characterised in that：This method is according to fault branch Position upward load layer loading electric network model, power grid mould is not loaded with for the equipment of same layer or a low load layer Type, for main electrical scheme part, all loading electric network model, final computation model are the superior load layer of fault branch, fault branch Model and main electrical scheme part.
- 2. the relay protection setting calculation method of power plant electric system according to claim 1, it is characterised in that：The party Method includes the following steps：(1) start；(2) fault branch is determined；(3) judge whether the fault branch is located in the range of main electrical scheme, if it is perform step (6), otherwise perform step (4)；(4) using the fault branch as starting point, upper level busbar is checked；(5) judge whether upper level busbar is located in the range of main electrical scheme, if it is perform step (6), otherwise perform step (4)；(6) whole models of load fault branch, the superior load layer model of fault branch and main wiring diagram；(7) mathematical model generation is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510244269.9A CN104836190B (en) | 2015-05-13 | 2015-05-13 | A kind of relay protection setting calculation method of power plant electric system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510244269.9A CN104836190B (en) | 2015-05-13 | 2015-05-13 | A kind of relay protection setting calculation method of power plant electric system |
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| Publication Number | Publication Date |
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| CN104836190A CN104836190A (en) | 2015-08-12 |
| CN104836190B true CN104836190B (en) | 2018-06-15 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108233324A (en) * | 2017-12-29 | 2018-06-29 | 国家电网公司 | Electric network model and computational methods based on more power type relay protection setting calculations |
| CN112366665B (en) * | 2020-11-05 | 2022-07-12 | 北京中恒博瑞数字电力科技有限公司 | Method and device for quickly breaking N-1 turns of line in relay protection setting calculation |
| CN112417372B (en) * | 2020-12-07 | 2024-02-09 | 国网新疆电力有限公司 | Fixed value setting calculation method and system suitable for power grid of any scale |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103227452A (en) * | 2012-01-31 | 2013-07-31 | 上海利乾电力科技有限公司 | Computing method of protection fixed value of relay of power plant |
| CN103001170A (en) * | 2012-11-15 | 2013-03-27 | 宁波天灵信息科技有限公司 | Setting calculation method and system of power grid relay protection setting values |
| CN103632308B (en) * | 2013-11-01 | 2017-06-16 | 广东电网公司电力调度控制中心 | She Wang power plant relay protection constant value risk evaluating system based on expert system |
| CN104392065A (en) * | 2014-12-08 | 2015-03-04 | 国网甘肃省电力公司刘家峡水电厂 | Method for generating model of power protection device |
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