CN104064001B - A kind of intelligent substation alarm inference method - Google Patents

A kind of intelligent substation alarm inference method Download PDF

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Publication number
CN104064001B
CN104064001B CN201410275105.8A CN201410275105A CN104064001B CN 104064001 B CN104064001 B CN 104064001B CN 201410275105 A CN201410275105 A CN 201410275105A CN 104064001 B CN104064001 B CN 104064001B
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China
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testing result
reasoning
yes
alarm
alarm signal
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CN201410275105.8A
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Chinese (zh)
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CN104064001A (en
Inventor
漆炜之
李瑞洲
施广德
骆兆军
许剑波
费春元
汤同峰
陈敬仁
詹成国
李纪云
芮国俊
Original Assignee
国家电网公司
江苏省电力公司淮安供电公司
南京国电南自软件工程有限公司
江苏省电力公司
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Priority to CN201410275105.8A priority Critical patent/CN104064001B/en
Publication of CN104064001A publication Critical patent/CN104064001A/en
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Abstract

The invention discloses a kind of intelligent substation alarm inference method, comprise the following steps: (1), to the signal setting weight stored in substation intelligent alarm system knowledge base, sets threshold value and signals collecting time to inference machine; (2) when transformer station produces alarm signal, by contrast knowledge base, intelligent warning system judges whether alarm signal triggers inference machine; (3) if the testing result of step (2) is yes, then start timing, detect the signals collecting time whether reaching setting; (4) if the testing result of step (3) is yes, then detect and whether have the new alarm signal of generation, if testing result is yes, then return step (2); (5) if the testing result of step (4) is no, then calculate the weight of alarm signal, then detect the threshold value whether weight be greater than setting, if testing result is no, then terminate reasoning, if testing result is yes, then reasoning is reached a conclusion.The present invention shows the uncertainty of reasoning, improves confidence level.

Description

A kind of intelligent substation alarm inference method

Technical field

The present invention relates to transformer station field, be specifically related to a kind of intelligent substation alarm inference method.

Background technology

State Grid Corporation of China clearly proposes to build " having informationization, robotization, interactive intelligent grid ", and plan builds up unified intelligent grid to the year two thousand twenty comprehensively.Transformer station is the critical facility of electrical network, be provided with a large amount of electrical equipments, intelligent substation is with transformer station first and second equipment for digitizing object, based on high-speed network communication platform, by carrying out standardization to digital information, realize the inside and outside information sharing in station and interoperability.

The warning information amount of intelligent substation is much larger than conventional substation, when an error occurs, system more can receive a large amount of warning information in a short time, causes larger burden to system cloud gray model, screens warning information simultaneously and also there is sizable difficulty with analysis, reasoning failure cause.The warning system of current intelligent substation merges multi-specialized knowledge, a large amount of expertises is solidified in system with expert knowledge library form, by the reasoning from logic analysis in knowledge based storehouse, integrated logic reasoning is carried out to relevant many warning information that certain primary fault in operational process produces, draw the rational analysis conclusion of this fault, and send scheduling station by result, but carry out reasoning substation fault with warning information and there is certain uncertainty, confidence level is lower, and main manifestations is the following aspects:

One, the uncertainty of warning information: the warning information that monitor and control facility provides is by the impact of the factor such as time, watch-dog performance, and non-fully is credible;

Two, the uncertainty of reasoning: being used for the signal of certain fault of reasoning is not that specific those are several, may only occur part signal when fault occurs;

Three, the uncertainty of conclusion: the fault of the actual generation of transformer station not necessarily conforms to inference conclusion, this fault may not occur, also may occur other fault.

Summary of the invention

The technical problem to be solved in the present invention is to provide a kind of intelligent substation alarm inference method, the alarm inference system warning information that can solve existing intelligent substation carrys out reasoning substation fault, the problem that the uncertainty due to warning information, reasoning and conclusion causes confidence level lower.

The present invention is achieved through the following technical solutions:

A kind of intelligent substation alarm inference method, comprises the following steps:

(1) to the signal setting weight stored in substation intelligent alarm system knowledge base, to inference machine setting threshold value and signals collecting time;

(2) when transformer station produces alarm signal, by contrast knowledge base, intelligent warning system judges whether alarm signal triggers inference machine, if testing result is no, then wait for new alarm signal;

(3) if the testing result of step (2) is yes, then start timing, detect the signals collecting time whether reaching setting, if testing result is no, then continue timing;

(4) if the testing result of step (3) is yes, then detect and whether have the new alarm signal of generation, if testing result is yes, then return step (2);

(5) if the testing result of step (4) is no, then calculate the weight of alarm signal, then detect the threshold value whether weight be greater than setting, if testing result is no, then terminate reasoning, if testing result is yes, then reasoning is reached a conclusion.

When the great threshold value in setting of step (5) right to examin, first adopt the method for exhaustion to carry out reasoning, if the event matched cannot be found, then adopt fuzzy reasoning method to carry out reasoning.

The present invention's advantage is compared with prior art:

One, the uncertainty of warning information is showed by weight, by control signal acquisition time to obtain abundant warning information, showed the uncertainty of intelligent alarm reasoning by threshold value, the error rate that effective control false alarm rate and reasoning are reached a conclusion, improve the confidence level of inference conclusion;

Two, the comprehensive method of exhaustion and the fuzzy reasoning method of using carries out reasoning, improves the confidence level of inference conclusion further;

Three, reduce the workload of maintainer, increase work efficiency.

Accompanying drawing explanation

Fig. 1 is intelligent alarm reasoning process flow diagram.

Embodiment

A kind of intelligent substation alarm inference method as shown in Figure 1, comprises the following steps:

(1) to the signal setting weight stored in substation intelligent alarm system knowledge base, to inference machine setting threshold value and signals collecting time, need in conjunction with field operation experiences to adjust the setting of threshold values, threshold values arranged conference and causes reasoning well can not show the uncertainty of intelligent alarm reasoning, threshold values arranges too small, can cause producing more false alarm and false alarm;

(2) when transformer station produces alarm signal, by contrast knowledge base, intelligent warning system judges whether alarm signal triggers inference machine, if testing result is no, then wait for new alarm signal;

(3) if the testing result of step (2) is yes, then start timing, detect the signals collecting time whether reaching setting, if testing result is no, then continue timing;

(4) if the testing result of step (3) is yes, then detect and whether have the new alarm signal of generation, if testing result is yes, then return step (2);

(5) if the testing result of step (4) is no, then calculate the weight of alarm signal, detect the threshold value whether weight is greater than setting again, if testing result is no, then terminate reasoning, if testing result is yes, then first adopts the method for exhaustion to carry out reasoning and reach a conclusion, if the event matched cannot be found, then adopt fuzzy reasoning method to carry out reasoning to reach a conclusion.

The so-called method of exhaustion, namely goes out an anomalous event from the combinational reasoning of certain event; As long as fuzzy reasoning method finds certain or multiple event on certain unit, no matter have other events or not and just infer an anomalous event.Method of exhaustion reasoning is accurate, effectively can get rid of the impact of remote signalling by mistake, but adaptability is slightly poor, because substation equipment model, construct various, alarm signal can not be completely the same; Fuzzy reasoning method inferential accuracy is not as the method for exhaustion, and occasional is by the interference of remote signalling by mistake, but adaptability is fine, can tackle the equipment of different model, structure, and inferential accuracy is also enough to meet the on-the-spot needs run.Two kinds of methods suitably merged during system, the inference rule first listed by the method for exhaustion contrasts, if cannot find out the event matched, then uses fuzzy reasoning instead, improves confidence level further.

While reasoning is reached a conclusion, warning system gives the correlation signal may omitted in this reasoning process, and prompting operations staff pays close attention to coherent signal and whether relevant apparatus has exception, finds the hidden danger in transformer station as early as possible.Further, while reasoning is reached a conclusion, warning system also according to the inference rule Auto-matching in the quantity of generation alarm signal, time order and function order and the time interval and knowledge base, can draw the confidence level of this inference conclusion, is used for pointing out operations staff.

Claims (2)

1. an intelligent substation alarm inference method, is characterized in that comprising the following steps:
(1) to the signal setting weight stored in substation intelligent alarm system knowledge base, to inference machine setting threshold value and signals collecting time;
(2) when transformer station produces alarm signal, by contrast knowledge base, intelligent warning system judges whether alarm signal triggers inference machine, if testing result is no, then wait for new alarm signal;
(3) if the testing result of step (2) is yes, then start timing, detect the signals collecting time whether reaching setting, if testing result is no, then continue timing;
(4) if the testing result of step (3) is yes, then detect and whether have the new alarm signal of generation, if testing result is yes, then return step (2);
(5) if the testing result of step (4) is no, then calculate the weight of alarm signal, then detect the threshold value whether weight be greater than setting, if testing result is no, then terminate reasoning, if testing result is yes, then reasoning is reached a conclusion.
2. a kind of intelligent substation alarm inference method as claimed in claim 1, it is characterized in that: when the great threshold value in setting of step (5) right to examin, first adopt the method for exhaustion to carry out reasoning, if the event matched cannot be found, then adopt fuzzy reasoning method to carry out reasoning.
CN201410275105.8A 2014-06-19 2014-06-19 A kind of intelligent substation alarm inference method CN104064001B (en)

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CN108074381B (en) * 2016-11-10 2019-09-10 杭州海康威视系统技术有限公司 Alarm method, apparatus and system
CN107563681A (en) * 2017-10-23 2018-01-09 国网安徽省电力公司 A kind of hybrid analysis of grid equipment synthesis event

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JP5279781B2 (en) * 2010-09-16 2013-09-04 株式会社東芝 Power monitoring device
CN102035260B (en) * 2010-12-17 2012-08-15 国电南瑞科技股份有限公司 Intelligent warning and fault analysis realizing method for intelligent transformer substation monitoring system
CN102393922B (en) * 2011-06-23 2013-11-27 山西省电力公司晋中供电分公司 Fuzzy Petri inference method of intelligent alarm expert system of transformer substation
CN102663500B (en) * 2012-03-27 2015-01-07 许继电气股份有限公司 Fuzzy Petri net transformer station fault diagnosis method based on time membership analysis
CN102638100B (en) * 2012-04-05 2014-02-19 华北电力大学 District power network equipment abnormal alarm signal association analysis and diagnosis method
CN103679354A (en) * 2013-12-02 2014-03-26 南京磐能电力科技股份有限公司 Intelligent warning method on basis of multilayer fault inference library and intelligent inference machine

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