CN104836190A - Relay protection setting calculating method of power plant electric power system - Google Patents
Relay protection setting calculating method of power plant electric power system Download PDFInfo
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- CN104836190A CN104836190A CN201510244269.9A CN201510244269A CN104836190A CN 104836190 A CN104836190 A CN 104836190A CN 201510244269 A CN201510244269 A CN 201510244269A CN 104836190 A CN104836190 A CN 104836190A
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Abstract
The invention discloses a relay protection setting calculating method of a power plant electric power system. When a computer algorithm is adopted, power network models (the primary wiring relations of power networks) need to be converted into mathematic models of the power networks, a conventionally adopted method involves converting all the power network models, yet the method provided by the invention only involves converting a part of the power network models. The method provided by the invention greatly reduces the size of the loaded mathematic models, reduces the dimension number of a node admittance matrix, shortens the matrix inversion time and greatly accelerates the operation speed. According to the relay protection setting calculating method of the power plant electric power system, the power network models are loaded towards a last load layer according to the position of a fault branch, the power network models are not loaded for devices at the same layer or at a lower load layer, and the power network models are all loaded for a primary wiring portion.
Description
Technical field
The invention belongs to the technical field of electric power system adaptive setting, relate to the relay protection setting calculation method of a kind of power plant electric power system particularly.
Background technology
For a long time; factory's net integration runs; power plant relay protection management and fixed value adjusting calculate to be responsible for by relevant electric network protection specialty always; so power plant calculates the calculation of fault analysis of relaying protection specialty, fixed value adjusting and management work attention degree is inadequate; after causing separating the factory and network, power plant relaying protection specialty becomes a weak link.
At present, all adopt software of adjusting at transmission line adaptive setting, its rapidity calculated and accuracy obtain general accreditation.And shortcoming is also compared in the work in power plant protection seting, most of power plant still adopts the mode of artificial hand computation to carry out fault analysis and protection and adjusts, and the epoch that this and computer nowadays develop rapidly are not suitable with.
Now modeling is carried out to power plant, carry out setting parameter calculating.Because power plant forms primarily of three digest journals, coal burning system, boiler circuit and electrical system.When modeling, electrical system is called main electrical scheme part, coal burning system and boiler circuit are called the loaded portion of power plant.Each part is made up of a lot of mini system, and wherein combustion system comprises fuel system, boiler combustion system, dedusting ash disposal system and ventilating system; Boiler circuit comprises water supply system, cooling water system unifies water charging system; Electrical system comprises turbine control system, Auxiliary Power Control System, directly sends circuit or boosting transformation station control system.Therefore, the electric parameter of power plant is numerous and complicated, and computational process is obviously also extremely complicated.Power plant's internal loading layer is more, and along with the increase of load layer, during calculation of fault, nodes sharply increases, and for computer, causes very large workload.
Summary of the invention
Technology of the present invention is dealt with problems and is: overcome the deficiencies in the prior art; the relay protection setting calculation method of a kind of power plant electric power system is provided; which greatly reduce the size loading electric network model; reduce the dimension of node admittance battle array; shorten the time of matrix inversion, accelerate arithmetic speed greatly.
Technical solution of the present invention is: the relay protection setting calculation method of this power plant electric power system; the method is according to the position of a fault branch upwards load layer loading electric network model; equipment for same layer or a low load layer does not load electric network model, all loads electric network model for main electrical scheme part.
This method is according to a fault branch position upwards load layer loading electric network model, for the equipment of same layer or a low load layer, its resistance value and operational mode can not have impact to result of calculation, so do not need to load this part electric network model, all load for main electrical scheme part.Due to when calculating, first node admittance matrix will be generated, then Node impedance matrix is obtained after admittance matrix being inverted, because relate to a large amount of calculating operations to inverting of matrix, along with its used time exponentially of inverting of increase of nodes rises, reduced the operation of nodes by loading section electric network model, greatly reduce the size of stress model, reduce the dimension of node admittance battle array, shorten the time of matrix inversion, accelerate arithmetic speed greatly.
Accompanying drawing explanation
Fig. 1 shows the flow chart of the relay protection setting calculation method according to power plant of the present invention electric power system;
Fig. 2 shows the primary connection figure of certain power plant.
Embodiment
The relay protection setting calculation method of this power plant electric power system; the method is according to the position of a fault branch upwards load layer loading electric network model; equipment for same layer or a low load layer does not load electric network model, all loads electric network model for main electrical scheme part.
This method is according to a fault branch position upwards load layer loading electric network model, for the equipment of same layer or a low load layer, its resistance value and operational mode can not have impact to result of calculation, so do not need to load this part electric network model, all load for main electrical scheme part.Due to when calculating, first node admittance matrix will be generated, then Node impedance matrix is obtained after admittance matrix being inverted, because relate to a large amount of calculating operations to inverting of matrix, along with its used time exponentially of inverting of increase of nodes rises, reduced the operation of nodes by loading section electric network model, greatly reduce the size loading electric network model, reduce the dimension of node admittance battle array, shorten the time of matrix inversion, accelerate arithmetic speed greatly.
Preferably, as shown in Figure 1, the method comprises the following steps:
(1) start;
(2) fault branch is determined;
(3) judge whether this fault branch is positioned at main electrical scheme scope, if it is perform step (6), otherwise perform step (4);
(4) using this bus as starting point, check upper level bus;
(5) judge whether upper level bus is positioned at main electrical scheme scope, if it is perform step (6), otherwise perform step (4);
(6) whole electric network models of main wiring diagram are loaded;
(7) Mathematical Modeling has generated.
Provide a specific embodiment below.The primary connection figure of certain power plant as shown in Figure 2, eliminates the loaded portion of 6kV1B, 6kV2A and 6kV2B in figure, and the loaded portion of 400V steam turbine PC section, 400V defeated coal PC1 section and 400V defeated coal PC2 section.As fault occurs in 400V steam turbine PC section, the higher level's bus so upwards finding fault point is 6kV1A section, bus 400V steamer PC section and 1# steamer are become to be loaded in computational mathematics model, because bus 6kV1A section is the main wiring diagram of power plant, no longer upwards search the Mathematical Modeling directly main wiring diagram all being loaded the calculating being just this, the Mathematical Modeling of so final loading is that accompanying drawing 2 removes dotted portion.
The above; it is only preferred embodiment of the present invention; not any pro forma restriction is done to the present invention, every above embodiment is done according to technical spirit of the present invention any simple modification, equivalent variations and modification, all still belong to the protection range of technical solution of the present invention.
Claims (2)
1. the relay protection setting calculation method of a power plant electric power system; it is characterized in that: the method is according to the position of a fault branch upwards load layer loading electric network model; equipment for same layer or a low load layer does not load electric network model, all loads electric network model for main electrical scheme part.
2. the relay protection setting calculation method of power plant according to claim 1 electric power system, is characterized in that: the method comprises the following steps:
(1) start;
(2) fault branch is determined;
(3) judge whether this fault branch is positioned at main electrical scheme scope, if it is perform step (6), otherwise perform step (4);
(4) using this bus as starting point, check upper level bus;
(5) judge whether upper level bus is positioned at main electrical scheme scope, if it is perform step (6), otherwise perform step (4);
(6) whole models of main wiring diagram are loaded;
(7) Mathematical Modeling has generated.
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| Application Number | Priority Date | Filing Date | Title |
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| 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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| 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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| CN104836190A true CN104836190A (en) | 2015-08-12 |
| CN104836190B CN104836190B (en) | 2018-06-15 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN112366665A (en) * | 2020-11-05 | 2021-02-12 | 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 |
| CN112417372A (en) * | 2020-12-07 | 2021-02-26 | 国网新疆电力有限公司 | Fixed value setting calculation method and system suitable for power grid of any scale |
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| 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 |
| 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 |
| CN103632308A (en) * | 2013-11-01 | 2014-03-12 | 广东电网公司电力调度控制中心 | Grid-related power plant relay protection fixed value risk evaluation system based on expert system |
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2015
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Patent Citations (4)
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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 |
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Cited By (4)
| 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 |
| CN112366665A (en) * | 2020-11-05 | 2021-02-12 | 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 |
| CN112417372A (en) * | 2020-12-07 | 2021-02-26 | 国网新疆电力有限公司 | Fixed value setting calculation method and system suitable for power grid of any scale |
| 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 |
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| CN104836190B (en) | 2018-06-15 |
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