CN103605787A - Method and system for evaluating and analyzing relay protection - Google Patents
Method and system for evaluating and analyzing relay protection Download PDFInfo
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Abstract
The invention belongs to the technical field of intelligent power grids, and provides a method and system for evaluating and analyzing relay protection. The method comprises the steps that the movement conditions of a protection device are analyzed according to definite value data provided by a fault recorder and the relay protection device, data information is acquired and managed, and an information database is constructed; the analysis models of the relay protection device are constructed, and comprise an operating reason analysis model and a correction analysis model; searches are carried out in the information database according to the current operating state of the relay protection device, the corresponding analysis models are found, and an evaluation result is calculated. The reason for a fault can be analyzed to the maximum extent according to the operating state of the relay protection device, the relay protection device is maintained by work personnel according to the reason, the safety of electrical equipment and the stable operation of an electric system are effectively guaranteed, and the maloperation, operation refusing and other incorrect operations of the protection device are avoided.
Description
Technical field
The invention belongs to intelligent grid technical field, relate in particular to a kind of relay protection evaluation analysis method and system.
Background technology
Current, China and even international power grid construction enter the intelligent grid epoch comprehensively, the enforcement of intelligent grid that the strategy of State Grid Corporation of China's three-step-march is more firm.The target of intelligent grid is exactly to realize unified strong electrical network, and relay protection is as the slubbing security protection of electric system, and status is always self-evident with effect.Quick-action, selectivity, reliability and sensitivity are four basic demands of relay protection, and selectivity is the key factor that runs through wherein, mutually coordinates.Relay protection is from conceptual design, to product application, all inseparable with adjusting of definite value.Relay protection setting calculates and in selectivity and sensitivity, chooses exactly to a great extent, all the more so in Medial & Low Voltage Power Network especially.So, to the cooperation of the whole network relay protection acting characteristic, analyze most important.
Along with the continuous expansion of electric system, the putting into operation successively of large capacity unit, high voltage installation, power equipment system is more and more huger, and the theory structure of relay protection also becomes increasingly complex.Although the trend of relay protection development is that the configuration action behavior more perfect, protection of standard, defencive function is more reliable more in the management work that makes protection.But the incorrect operation of protective relaying device still exists; if protective device can not correct operation, excise fast fault; the expansion that certainly will cause the accident, thus the stable operation of electric system affected, so that the correct operation of protective relaying device also just seems is particularly important.
Can protective relaying device correctly play a role; be unable to do without the calculating of correctly adjusting reliably; after the work of adjusting completes; whether adjusting of protection definite value be correct; whether sensitivity meets the needs of actual motion; verify whether existing protection philosophy meets the requirement of system operation, thereby protective relaying device is correctly played a role.In electric power transfer application at present; also there is no a kind of protective relaying device online actions behavior evaluation analytical plan; make the safety of electrical equipment, the stable operation of electric system cannot be protected, often there will be the incorrect operations such as the malfunction of protective device and tripping.
Summary of the invention
In view of the above problems, the object of the present invention is to provide a kind of relay protection evaluation analysis method and system, the safety of effective guarantee electrical equipment, the stable operation of electric system, avoid occurring the incorrect operations such as the malfunction of protective device and tripping.
On the one hand, described relay protection evaluation analysis method comprises the steps:
The value data providing according to fault oscillograph and protective relaying device, analyzes the action situation of protective device, obtains and management data information, creates information data and builds storehouse;
Create the analytical model of protective relaying device, described analytical model comprises operation analysis of causes model and correction analysis model;
According to the current running status of protective relaying device, search described information database, find corresponding analytical model, and calculate evaluation result.
On the other hand, described relay protection the system of analysis and appraisal comprises:
Database unit, for the value data providing according to fault oscillograph and protective relaying device, analyzes the action situation of protective device, obtains and management data information, creates information data and builds storehouse;
Analytical model is set up unit, and for creating the analytical model of protective relaying device, described analytical model comprises operation analysis of causes model and correction analysis model;
Result computing unit, for according to the current running status of protective relaying device, searches described information database, finds corresponding analytical model, and calculates evaluation result.
The invention has the beneficial effects as follows: the present invention is by creating information database and analytical model, according to the running status of current protective relaying device, from quantity of state corresponding to information data library lookup and operation module, start operation module, from described analytical model, find matching condition, then export corresponding evaluation result, described evaluation result has shown that the most probable reason of current running status appears in protective relaying device, staff can be according to evaluation result to protective relaying device correspondence proving, discharge mistake, guaranteed the safety of electrical equipment, the stable operation of electric system.
Accompanying drawing explanation
Fig. 1 is the process flow diagram of the relay protection evaluation analysis method that provides of the embodiment of the present invention;
Fig. 2 is the particular flow sheet of step S1 in Fig. 1;
Fig. 3 is the particular flow sheet of step S3 in Fig. 1;
Fig. 4 is the block diagram of the relay protection the system of analysis and appraisal that provides of the embodiment of the present invention;
Fig. 5 is the block diagram of the Database unit that provides of the embodiment of the present invention;
Fig. 6 is the block diagram of the result computing unit that provides of the embodiment of the present invention.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
For technical solutions according to the invention are described, below by specific embodiment, describe.
Fig. 1 shows the flow process of the relay protection evaluation analysis method that the embodiment of the present invention provides, and only shows for convenience of explanation the part relevant to the embodiment of the present invention.
The relay protection evaluation analysis method that the present embodiment provides comprises the steps:
Step S1, the value data providing according to fault oscillograph and protective relaying device, analyze the action situation of protective device, obtains and management data information, creates information data and build storehouse;
The analytical model of step S2, establishment protective relaying device, described analytical model comprises operation analysis of causes model and correction analysis model;
Step S3, according to the current running status of protective relaying device, search described information database, find corresponding analytical model, and calculate evaluation result.
Value data is generally preserved by COMTRADE file layout, record all includes four files, they are respectively: header file, configuration file, data file and message file, these four files all should have identical filename, only by the extension name of explanation files in different types, are distinguished.Each sampling in data file, data file is all comprising the sample number of each passage, markers and data value.All data in data file are all integer data format.According to described value data, analyze the exercises situation of protective device, obtain and management data information, create information data and build storehouse.
Preferably, as shown in Figure 2, described step S1 comprises:
Step S11, obtain definite value quantity of state, failure volume and protection operating state amount;
Step S12, the logic theory by protective relaying device coordinate described definite value quantity of state, failure volume and protection operating state amount to generate the operation module of links, store above-mentioned three quantity of states and operation module creation information database.
Protective relaying device action situation generally can be showed by definite value quantity of state, failure volume and protection operating state amount, and described definite value quantity of state is organized into form by definite value inventory, network connection figure and the operation atlas etc. that all departments are provided and reads for system; Described failure volume obtains by obtaining the needed data volume of each moment point, and described protection operating state amount is obtained from the data interface of user's input.Get after definite value quantity of state, failure volume and protection operating state amount; logic theory in conjunction with protective relaying device; generate the operation module of links, comprise that fault type module, fault coverage module, protection start module, trip protection module and reclosing module etc.
In above-mentioned steps S2; described analytical model comprises operation analysis of causes model and correction analysis model; analytical model is comprised of condition and result; the form storage of two arrays of numbering with band; operation analysis of causes model is mainly analyzed for its operational effect under different ruuning situation according to relay protection; correction analysis model is mainly when there is a plurality of matching condition, finds most suitable evaluation result output.Result mainly comprises correct operation and incorrect operation two classes, and the concrete reason that comprises incorrect operation, described incorrect operation reason comprises every factors such as maloperation, tuning error, debugging are bad, device problem of manufacturing qualities, software principle defect and external force impact.The appearance of these factors all draws according to the analytic process of logic theory.According to the realization of the calculating of the protection module of each link and logical topology connection, form operation analysis of causes model, and preserve correct operation and incorrect operation reason and failsafe link.
Preferably, as shown in Figure 3, described step S3 comprises:
Step S31, obtain the current running status of protective relaying device;
Step S32, from described information database, find corresponding quantity of state and operation module;
Step S33, scanning operation analysis of causes model, the condition of match query;
Step S34, when there is matching condition, export corresponding result as the evaluation result of protective relaying device.
In described step S34; more than one of matching condition possibility; so here continue scanning correction analysis model; call the confidence level computing method based on weights method; Different matching condition is carried out to propagation coefficient calculating; then select the matching condition of propagation coefficient maximum, and export corresponding result as the evaluation result of protective relaying device.
First the Different Results being produced by identical conditions is formed to a result set Con={Con1 ..., Conk}, composes a weights tk to different matching conditions, according to weights, calculates propagation coefficient
Wherein, X is correction factor, and lk is the corresponding numerical value of matching condition, t
kl
krepresent the absolute confidence level after this conclusion weighting, t
kweighting coefficient (weights);
the weighted mean value that represents regular all Certainty Factors;
represent the Certainty Factor weighted mean value of revising.When confidence level is larger, or weights are larger time, propagation coefficient CF (C
i-1→ C
i) just larger.Select the matching condition of propagation coefficient maximum, and export corresponding result as the evaluation result of protective relaying device.
In addition, the present embodiment also provides a kind of relay protection the system of analysis and appraisal, as shown in Figure 4, comprising:
Analytical model is set up unit 42, and for creating the analytical model of protective relaying device, described analytical model comprises operation analysis of causes model and correction analysis model;
Preferably, as shown in Figure 5, described Database unit 41 comprises:
Quantity of state acquisition module 411, for obtaining definite value quantity of state, failure volume and protection operating state amount;
Preferably, described result computing unit 43 comprises:
Running status acquisition module 431, for obtaining the current running status of protective relaying device;
Data search module 432, for finding corresponding quantity of state and operation module from described information database;
Condition Matching module 433, for scanning operation analysis of causes model, the condition of match query;
Result computing module 434, for when there is matching condition, exports corresponding result as the evaluation result of protective relaying device.
Preferably, described result computing module 434 comprises:
Correcting module unit, for when there being more than one of matching condition and matching condition, scans correction analysis model;
Propagation coefficient computing unit, for calling the confidence level computing method based on weights method, carries out propagation coefficient calculating to Different matching condition;
Result output unit, for selecting the matching condition of propagation coefficient maximum, and exports corresponding result as the evaluation result of protective relaying device.
To sum up; the invention provides a kind of relay protection evaluation analysis method and system; by technical solution of the present invention, can analyze to the full extent the reason breaking down according to the running status of protective relaying device; staff overhauls the safety of effective guarantee electrical equipment, the stable operation of electric system according to described reason to protective relaying device, avoids occurring the incorrect operations such as the malfunction of protective device and tripping.
One of ordinary skill in the art will appreciate that, the all or part of step realizing in above-described embodiment method is to come the hardware that instruction is relevant to complete by program, described program can be in being stored in a computer read/write memory medium, described storage medium, as ROM/RAM, disk, CD etc.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. a relay protection evaluation analysis method, is characterized in that, described method comprises:
The value data providing according to fault oscillograph and protective relaying device, analyzes the action situation of protective device, obtains and management data information, creates information data and builds storehouse;
Create the analytical model of protective relaying device, described analytical model comprises operation analysis of causes model and correction analysis model;
According to the current running status of protective relaying device, search described information database, find corresponding analytical model, and calculate evaluation result.
2. method as claimed in claim 1, is characterized in that, the described value data providing according to fault oscillograph and protective relaying device; action situation to protective device is analyzed; obtain and management data information, create information data and build storehouse step, specifically comprise:
Obtain definite value quantity of state, failure volume and protection operating state amount;
Logic theory by protective relaying device coordinates described definite value quantity of state, failure volume and protection operating state amount to generate the operation module of links, stores above-mentioned three quantity of states and operation module creation information database.
3. method as claimed in claim 2, is characterized in that, described operation module comprises that fault type module, fault coverage module, protection start module, trip protection module and reclosing module.
4. method as claimed in claim 3, is characterized in that, describedly according to the current running status of protective relaying device, searches described information database, finds corresponding analytical model, and calculates evaluation result step, specifically comprises:
Obtain the current running status of protective relaying device;
From described information database, find corresponding quantity of state and operation module;
Scanning operation analysis of causes model, the condition of match query;
When there is matching condition, export corresponding result as the evaluation result of protective relaying device.
5. method as claimed in claim 4, is characterized in that, described when there is matching condition, exports corresponding result as the evaluation result of protective relaying device, specifically comprises:
When there being more than one of matching condition and matching condition, scanning correction analysis model;
Call the confidence level computing method based on weights method, Different matching condition is carried out to propagation coefficient calculating;
Select the matching condition of propagation coefficient maximum, and export corresponding result as the evaluation result of protective relaying device.
6. method as claimed in claim 5, is characterized in that, described in call the confidence level computing method based on weights method, Different matching condition is carried out to propagation coefficient calculation procedure, specifically comprise:
To different matching conditions, give corresponding weights tk;
According to weights, calculate propagation coefficient
Wherein, X is correction factor, and lk is the corresponding numerical value of matching condition.
7. a relay protection the system of analysis and appraisal, is characterized in that, described system comprises:
Database unit, for the value data providing according to fault oscillograph and protective relaying device, analyzes the action situation of protective device, obtains and management data information, creates information data and builds storehouse;
Analytical model is set up unit, and for creating the analytical model of protective relaying device, described analytical model comprises operation analysis of causes model and correction analysis model;
Result computing unit, for according to the current running status of protective relaying device, searches described information database, finds corresponding analytical model, and calculates evaluation result.
8. system as described in right haughtiness 7, is characterized in that, described Database unit comprises:
Quantity of state acquisition module, for obtaining definite value quantity of state, failure volume and protection operating state amount;
Data creation module, coordinates described definite value quantity of state, failure volume and protection operating state amount to generate the operation module of links for the logic theory by protective relaying device, stores above-mentioned three quantity of states and operation module creation information database.
9. system as claimed in claim 8, is characterized in that, described result computing unit comprises:
Running status acquisition module, for obtaining the current running status of protective relaying device;
Data search module, for finding corresponding quantity of state and operation module from described information database;
Condition Matching module, for scanning operation analysis of causes model, the condition of match query;
Result computing module, for when there is matching condition, exports corresponding result as the evaluation result of protective relaying device.
10. system as claimed in claim 9, is characterized in that, described result computing module comprises:
Correcting module unit, for when there being more than one of matching condition and matching condition, scans correction analysis model;
Propagation coefficient computing unit, for calling the confidence level computing method based on weights method, carries out propagation coefficient calculating to Different matching condition;
Result output unit, for selecting the matching condition of propagation coefficient maximum, and exports corresponding result as the evaluation result of protective relaying device.
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Cited By (8)
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| CN104931831A (en) * | 2015-06-18 | 2015-09-23 | 广东电网有限责任公司电力调度控制中心 | Troubleshooting information acquisition method and system |
| CN104978178A (en) * | 2014-04-14 | 2015-10-14 | 南京南瑞继保电气有限公司 | Visualization method of relay protection constant value |
| CN105071379A (en) * | 2015-07-28 | 2015-11-18 | 国家电网公司 | AC-DC coordination control effect evaluation method and AC-DC coordination control effect evaluation device based on multi-source data |
| CN105353753A (en) * | 2015-12-04 | 2016-02-24 | 国网冀北电力有限公司 | Protection motion behavior intelligent analysis method based on multisource wave recording files |
| CN109919338A (en) * | 2019-03-22 | 2019-06-21 | 国网上海市电力公司 | The safety Analysis method of relay protection device |
| CN113341313A (en) * | 2021-06-18 | 2021-09-03 | 中铁第一勘察设计院集团有限公司 | Method for judging quality of protective action behaviors |
| CN113420409A (en) * | 2021-05-17 | 2021-09-21 | 云南电网有限责任公司 | Relay protection device operation state prediction method based on deep learning |
| CN113933707A (en) * | 2021-10-12 | 2022-01-14 | 哈尔滨电机厂有限责任公司 | Self-adjusting method for judging reliability of fault reason of generator set |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104978178A (en) * | 2014-04-14 | 2015-10-14 | 南京南瑞继保电气有限公司 | Visualization method of relay protection constant value |
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| CN104931831B (en) * | 2015-06-18 | 2016-06-08 | 广东电网有限责任公司电力调度控制中心 | Fault handling information acquisition methods and system |
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| CN105071379A (en) * | 2015-07-28 | 2015-11-18 | 国家电网公司 | AC-DC coordination control effect evaluation method and AC-DC coordination control effect evaluation device based on multi-source data |
| CN105353753A (en) * | 2015-12-04 | 2016-02-24 | 国网冀北电力有限公司 | Protection motion behavior intelligent analysis method based on multisource wave recording files |
| CN105353753B (en) * | 2015-12-04 | 2019-01-29 | 国网冀北电力有限公司 | Protection act behavior intelligent analysis method based on multi-source recorded wave file |
| CN109919338A (en) * | 2019-03-22 | 2019-06-21 | 国网上海市电力公司 | The safety Analysis method of relay protection device |
| CN113420409A (en) * | 2021-05-17 | 2021-09-21 | 云南电网有限责任公司 | Relay protection device operation state prediction method based on deep learning |
| CN113420409B (en) * | 2021-05-17 | 2022-12-20 | 云南电网有限责任公司 | Relay protection device operation state prediction method based on deep learning |
| CN113341313A (en) * | 2021-06-18 | 2021-09-03 | 中铁第一勘察设计院集团有限公司 | Method for judging quality of protective action behaviors |
| CN113341313B (en) * | 2021-06-18 | 2024-04-30 | 中铁第一勘察设计院集团有限公司 | Method for judging quality of protection action behavior |
| CN113933707A (en) * | 2021-10-12 | 2022-01-14 | 哈尔滨电机厂有限责任公司 | Self-adjusting method for judging reliability of fault reason of generator set |
| CN113933707B (en) * | 2021-10-12 | 2023-09-19 | 哈尔滨电机厂有限责任公司 | Self-adjusting method for judging reliability of fault cause of generator set |
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