CN103544574A - Transformer station intelligent expert system based on editable formula scripts - Google Patents
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Abstract
The invention discloses a transformer station intelligent expert system based on editable formula scripts. The transformer station intelligent expert system comprises a real-time analysis display main module, an expert knowledge base offline configuration tool module, a knowledge database module, a processing unit in which an editable formula script preprocessing layer is combined with a rule mode matching layer, a discrete event dynamic comparison unit capable of configuring effective time domains, a rule condition delay effectiveness and delay return trigger mechanism unit and a configurable 'before happening' and 'after happening' correlation site information automatic collection unit. By the adoption of the scheme, information of a transformer station monitoring system, such as the electric quantity, signals, warning and events, can be processed in a unified and comprehensive mode, an expert knowledge base can be flexibly modified and extended, the expert system can accurately and timely assists transformer station operators on duty and maintenance staff in correctly judging and processing accidents and exceptions through intelligent warning and real-time online analysis, and therefore the new requirements oriented to digital and intelligent transformer stations are better met.
Description
Technical field
The present invention relates to the applied professional skill field of monitoring system of electric substation, contain the industry control industry that power monitoring, track traffic, water conservancy monitoring, oil gas chemical industry, coal mine etc. need to be implemented power supply monitoring business.
Background technology
Fast development along with national economy, electric power system Substation Automation System level improves day by day, power supply management department is also faced with following problem and contradiction: while normally moving, face various magnanimity operation informations, operator on duty's monitor task is heavier, be easy to omit significant alarm information, incur loss through delay processing and cause the accident; Once have an accident, action event and relevant information are more, and operator on duty is dazzled, are difficult to concentrate on crucial points, thereby affect the correct processing of accident; Meanwhile, automation equipment in standing is many, it is wide to contain technical field, and maintenance knowledge technical ability is numerous and diverse, depend merely on self learning of operation maintenance personnel, limitation is large, poor in timeliness, lack the auxiliary and guidance in time of expertise, be difficult to meet the needs of electric power system safety, reliability service.And supervisory control of substation automated system is very ripe, perfect at aspects such as real-time communication, information acquisition and operation controls at present, but the function aspects in assistant analysis, decision-making is relatively deficient, existing analysis expert function is also confined to the aspects such as on-line monitoring of single equipment, obviously can not meet well current transformer substation system operation maintenance work in the urgent need to.
Summary of the invention
For existing problem in prior art, the invention discloses a kind of intelligent substation expert system based on editing formula script, its objective is: realize the various electric weight that monitoring system of electric substation is gathered, signal, report to the police, the information such as event are unified, overall treatment, expert knowledge library can be revised flexibly and expand, by intelligent alarm and the comprehensive analysis of fault of monitoring system of electric substation, can be more accurate, auxiliary substation is on duty in time, maintainer correctly judges and processes accident and abnormal, thereby meet well the new demand towards Intelligent transformer station, have with supervisory control of substation background system compatible mutually, processing real-time is high, general, strong adaptability, can flexible configuration and the advantage of expansion.
Technical scheme of the present invention is: a kind of intelligent substation expert system based on editing formula script, comprise that real-time analysis shows primary module, expert knowledge library off-line arrangement tool model and knowledge data library module, it is characterized in that, it also comprises following four unit:
Can edit the processing unit that formula script pretreatment layer combines with mode of rule matching layer: can edit formula script pretreatment layer can support various input messages to carry out numerical operation by writing formula script neatly, logical operation, functional operation, allow combination, nested, condition is selected and Recursion process, mode of rule matching layer is taked event trigger mechanism, there is clear logic, succinctly, efficient characteristic, by editing tupe that formula script pretreatment layer combines with mode of rule matching layer, not only met complex logic and process required dirigibility but also effectively reduced the complexity that inference engine of expert system is realized, improve its operational efficiency, and can be that incoming event is given corresponding weight value according to different degree of membership models, by the mode of threshold values triggering rule, support fuzzy logic inference to expand.
The discrete event dynamic comparison unit of configurable effective time domain: the discrete event information such as the sudden protection action gathering for monitoring system of electric substation, device alarm; by type or period its effective time domain is set; the event being only in effective time domain just participates in regular the matching analysis; " window effective time " dynamically manifesting by rule realized the association screening to discrete event; both correctly identify validity event information, triggering rule in time, avoided again interference invalid, outdated information.
Rule condition time delay comes into force and trigger mechanism unit is returned in time delay: a large amount of process transient informations that gather when moving for monitoring system of electric substation, time delay by implementation rule condition comes into force and trigger mechanism is returned in time delay, take the duration as key criterion, thereby effectively filter out the unnecessary interference that process transient information brings, exactly fault and abnormal information are carried out to qualitative analysis.
Configurable " before generation " and " after occurring " relevant field data is compiled unit automatically: when meeting, providing analysis conclusion at rule condition, according to pre-configured, centered by the unit, interval of triggering rule, equipment, relevant field data before and after automatic collection fault or abnormal generation, and gather arrangement and unification document storing.
The invention has the beneficial effects as follows: by adopting, can edit the flexible tupe that formula script pretreatment layer combines with mode of rule matching layer, the discrete event dynamic comparison method of configurable effective time domain, rule condition time delay comes into force and trigger mechanism is returned in time delay, configurable " before generation " and " after occurring " relevant field data is compiled the technology such as function automatically, the NDT650 supervisory control of substation background system that coordinates our company to release, realized the various electric weight of Substation Station domain system, signal, report to the police, the information such as event are unified, overall treatment, intelligent alarm and comprehensive analysis of fault have been realized, can be more accurate, auxiliary substation operator on duty judges and processes accident and abnormal in time, meet well the new demand of transformer substation system operation maintenance.
The present invention program realizes various electric weight in monitoring system of electric substation, signal, report to the police, the information such as event are unified, overall treatment, expert knowledge library can be revised flexibly and expand, by intelligent alarm and the on-line analysis of expert system, can be more accurate, auxiliary substation is on duty in time, maintainer correctly judges and processes accident and abnormal, thereby meet better the new demand of Facing Digital Intelligent transformer station, have with supervisory control of substation background system compatible mutually, processing real-time is high, versatility, strong adaptability, can flexible configuration and the advantage of expansion.
Accompanying drawing explanation
Fig. 1 is that transformer station's expert system of the embodiment of the present invention forms schematic diagram.
Fig. 2 is transformer station's expert system flow chart of data processing schematic diagram of the embodiment of the present invention.
Fig. 3 is the discrete event dynamic comparison cell schematics of configurable effective time domain of the embodiment of the present invention.
Fig. 4 is that the associated field data of the embodiment of the present invention is analyzed schematic diagram.
Embodiment
Below in conjunction with relevant drawings and specific embodiment, the present invention is further elaborated.
As shown in Figure 1, Fig. 1 is that transformer station's expert system of the embodiment of the present invention forms schematic diagram, mainly by real-time analysis, show that primary module, expert knowledge library off-line arrangement tool model and knowledge data library module three parts form, wherein: real-time analysis shows that primary module is responsible for and supervisory system communication is obtained various substation operation states and event information, category filter alarm, real-time analysis, rule match and the User Interfaces such as alarm prompt hurdle, historical query are provided; Expert knowledge library off-line arrangement tool model is mainly responsible for the various processing logics relevant to transformer station O&M correctly to translate to one group of bivariate table information that represents specific rules, and is kept in database; Knowledge data library module is mainly responsible for rule configuration information and necessary historical record storage.
As shown in Figure 2, transformer station's expert system flow chart of data processing schematic diagram that Fig. 2 is the embodiment of the present invention.
When the discrete event information such as the real-time status amounts such as the remote signalling of monitoring system of electric substation collection, remote measurement and protection action, device alarm enter as input object after the input object queue of expert system, on the one hand can be through the screening of intelligent alarm module, according to the attribute of object and serious urgency level, be divided into the type informations such as common information, maintenance information, alarm and accident and displacement, the different views in expert system user interface shows respectively; On the other hand, can process through editing formula script pretreatment layer, according to result of calculation offence facts object, the latter, through the processing of mode of rule matching layer, completes rule match and draws diagnostic analysis result.
Can edit formula script pretreatment layer can support various input messages to carry out numerical operation, logical operation, functional operation by writing formula script neatly, allows combination, nested, condition to select and Recursion process, as support following arithmetic type and processing:
1. algebraic operation, comprise add (+), subtract (-), take advantage of (*), except (/), power (^), take absolute value (abs), negate (-) and evolution (sqrt);
2. digitwise operation, comprises and (&) or (|), non-(～);
3. triangulo operation, comprises sin, cos, tg, ctg, acsin, accos, actg and acctg;
4. logical operation, comprise with (& &) or (||), non-(! ), be greater than (>), be more than or equal to (>=), be less than (<), be less than or equal to (<=), equal (=), be not equal to (<>);
5. bracket (), priority is selected;
6. key word if ... then ... else ..., condition is selected;
Can edit formula script pretreatment layer and there is high execution efficiency: all formula scripts that edit only need once compile when expert system starts, verification generate executable code, and need to when each formula calculates, all not carry out grammer detection; By the relationship maps of the bivariate tables such as formula table, calculating scale and calculated amount parameter list, each formula script can be applied to the calculation process of any multinomial reality, need to not re-define due to the difference of operand; The operation result of each formula can directly trigger the processing that facts object enters mode of rule matching layer, also can be used as intermediate result and participates in next formula operation.
Mode of rule matching treatment layer, its clear logic, efficient, each condition can be preserved initial state information and the index of associated trigger object in rule match process, when rule activation provides analysis conclusion, contributes to rapid collection, records relevant field data.
The processing unit that the formula edited script pretreatment layer in the present invention program combines with mode of rule matching layer, for the rule match analysis of expertise provides great dirigibility and convenience, as can be by writing formula script, according to different degree of membership models, to input object, give corresponding weights, and whether meet and come into force by threshold values judgment rule, get final product the fuzzy logic inference of implementation rule.
The discrete event dynamic comparison cell schematics of configurable effective time domain that as shown in Figure 3, Fig. 3 is the embodiment of the present invention.The burst protection action gathering for monitoring system of electric substation, the discrete event information such as device alarm, its succession and markers are often inconsistent, in order to realize effective judgement of forward-backward correlation event, the present invention program realizes the discrete event dynamic comparison of configurable effective time domain: can be by type or the default corresponding effective time domain of period to concrete burst discrete event, beginning timing from it occurs constantly, the event being only in effective time domain just participates in regular the matching analysis, as long as when the effective time domain of all event object conditions corresponding to regular left button occurs overlapping, be that rule is while dynamically manifesting " window effective time ", just the match is successful for rule.The discrete event dynamic comparison unit of configurable effective time domain in the present invention program, has realized the efficient association screening to discrete event, has both correctly identified the timely matched rule of validity event information, has avoided again interference invalid, out-of-date event information.
The a large amount of process transient informations that gather when moving for monitoring system of electric substation, the time delay of the present invention program's implementation rule condition comes into force and trigger mechanism unit is returned in time delay, its technology realization character is: to representing each input object and the intermediate computations amount object of process transient information, all can be configured to time limit threshold trigger and the facts object processing mode that resets, take the duration as crucial foundation participation rule match, thereby effectively filter out the unnecessary interference that process transient information brings, exactly fault and abnormal information are carried out to qualitative analysis.With example, its utilization and practical value are described below, as: in transformer station, after primary side breaker closing, have that " spring is energy storage not " node signal provides and as sending supervisory system in remote signalling, under nominal situation, isolating switch should be at 20 seconds with interior energy storage success, this node signal also can automatically reset simultaneously, if but energy storage is abnormal or unsuccessfully, this node signal is understood sustainable existence; For this kind of situation, the input object processing mode that representative " spring is energy storage not " node signal can be set in the present invention program is that time delay triggers, time limit threshold is made as 20 seconds, triggers the facts object of " spring energy-storage fault or abnormal " by name, and adds corresponding rule treatments; During operation, in normal making process, " spring is energy storage not " information there will not be the judgement of disturbing operator on duty in the alarm event hurdle of user interface, but when breaking down or when abnormal, " spring energy-storage fault or abnormal " and the rule of correspondence can come into force at once, the very first time shows and ejects in alarm event hurdle, remind operator on duty note and process in time, and automatically collect, preserve relevant field data simultaneously.
Configurable " before generation " and " after occurring " relevant field data is compiled unit automatically: in the fault routine anomaly analysis of transformer substation system, except the parameter information of failure exception event itself, need to be to anti-other event and state information after before death of event toward contact, even station in relevant device all need for information about carry out comprehensively considering, could correctly find out fault source and cause.That in the present invention program, has realized configurable " before generation " and " occur after " relevant field data compiles unit automatically, its technology realization character is: for the rule of carrying out failure exception analysis, in rule conclusion, can the qualitative analysis be described and expert processes suggestion by format string form, relevant information kind (the accident displacement that need to collect in the time of also can being activated and coming into force by " rule association processing list " configuration rule, operation displacement, SOE, remote control, remote measurement is out-of-limit, RTU communication state, device alarm, protection event, protection report etc.), corresponding device interval, period, initial time limit (before generation) that simultaneously specified associations gathers and by time limit (after occurring), after when operation, rule match is activated and comes into force, expert system is when the very first time provides analysis result and suggestion, according to rule association configuration, the related information entry starting from the initial time limit will be searched for from input object list, together with rule analysis result, by the sequencing of time, gather and unify inventory list document for portion, as also having new related information to occur before arriving by the time limit, can be continued to add in this inventory list document, finally under the saving contents of expert system appointment, be saved as by the document of " markers _ event title .txt " name, if triggering rule is protective device action event, also fixed value adjusting, protection pressing plate state and the corresponding recorder data of collecting corresponding protective device are preserved simultaneously in the lump.
With example, its utilization and practical value are described below: be illustrated in figure 4 typical conventional traction substation main transformer device low-pressure side and an outgoing part main wiring diagram, main transformer low-pressure side 101 isolating switchs are that main transformer protection is controlled, and feeder line end 301 isolating switchs are that protection for feed line is controlled; In the present invention program, the fault analysis rule being triggered by main transformer low-pressure side protection action event, the information configuration such as startup, action event, on off state, the remote measurement of Ke Jiang subordinate protection for feed line are out-of-limit are the associated information gathering, adjusting simultaneously and gathering the initial time limit (before protection action generation) is 3 seconds, and the collection of adjusting is 9 seconds by the time limit (protection action occurs rear); After main transformer low-pressure side overcurrent protection action, except protection action itself accident parameter, action parameter be collected, the associated relevant informations such as protection startup that gather all subordinates feeder protection equipment in the time limit also will be by real time record, and together with being summarised in corresponding protective device recorder data; Afterwards when operation maintenance personnel carry out crash analysis; before main transformer low-pressure side protection action; subordinate's 301 protection for feed line start; compare relevant variation relation in both recorder datas; can conclude that 301 feed out the anti-raw short trouble in the outer A of line end place; and there is the abnormal behaviour of overstep tripping in the protection of main transformer low-pressure side; thereby check in time, the superior and the subordinate protections is adjusted, pressing plate is thrown and moved back state and check corresponding protective device operating condition, rather than thinks just common together main transformer overcurrent protection action by mistake and missed the investigation of hidden danger.
Typical case's application: the important component part of the transformer station of new generation digital intellectualization product that the transformer station's expert system based on the present invention program is released as the applicant is successfully applied to concrete track traffic digital intellectualization substation project project, and its operational effect has obtained user and engineering staff's good favorable comment.
Although the present invention with preferred embodiment openly as above; but embodiment and accompanying drawing are not for limiting the present invention, be anyly familiar with this skill person, without departing from the spirit and scope of the invention; from working as, can make various changes or retouch, equally within the present invention's protection domain.What therefore protection scope of the present invention should be defined with the application's claim protection domain is as the criterion.
Claims (8)
1. the intelligent substation expert system based on editing formula script, comprises that real-time analysis shows primary module, expert knowledge library off-line arrangement tool software and knowledge data library module, it is characterized in that, it also comprises:
Can edit the processing unit that formula script pretreatment layer combines with mode of rule matching layer: can edit formula script pretreatment layer can support various input messages to carry out numerical operation by writing formula script neatly, logical operation, functional operation, allow combination, nested, condition is selected and Recursion process, mode of rule matching layer is taked event trigger mechanism, there is clear logic, succinctly, efficient characteristic, by editing tupe that formula script pretreatment layer combines with mode of rule matching layer, not only met complex logic and process required dirigibility but also effectively reduced the complexity that inference engine of expert system is realized, improve its operational efficiency, and can be that incoming event is given corresponding weight value according to different degree of membership models, by the mode of threshold values triggering rule, support fuzzy logic inference to expand,
The discrete event dynamic comparison unit of configurable effective time domain: the discrete event information such as the sudden protection action gathering for monitoring system of electric substation, device alarm, by type or period its effective time domain is set, the event being only in effective time domain just participates in regular the matching analysis, " window effective time " dynamically manifesting by rule realized the association screening to discrete event, both correctly identify validity event information, triggering rule in time, avoided again interference invalid, outdated information;
Rule condition time delay comes into force and trigger mechanism unit is returned in time delay: a large amount of process transient informations that gather when moving for monitoring system of electric substation, time delay by implementation rule condition comes into force and trigger mechanism is returned in time delay, take the duration as key criterion, thereby effectively filter out the unnecessary interference that process transient information brings, exactly fault and abnormal information are carried out to qualitative analysis;
Configurable " before generation " and " after occurring " relevant field data is compiled unit automatically: when meeting, providing analysis conclusion at rule condition, according to pre-configured, centered by the unit, interval of triggering rule, equipment, relevant field data before and after automatic collection fault or abnormal generation, and gather arrangement and unification document storing.
2. the intelligent substation expert system based on editing formula script according to claim 1, is characterized in that: described real-time analysis shows that primary module is responsible for and supervisory system communication is obtained various substation operation states and event information, category filter alarm, real-time analysis, rule match and alarm prompt hurdle, historical query User Interface are provided; Described expert knowledge library off-line arrangement tool model is responsible for the various processing logics relevant to transformer station O&M correctly to translate to one group of bivariate table information that represents specific rules, and is kept in database; Described knowledge data library module is responsible for rule configuration information and necessary historical record storage.
3. the intelligent substation expert system based on editing formula script according to claim 2, it is characterized in that: the described formula script pretreatment layer of editing, all formula scripts that edit only need once compile when expert system starts, verification generate executable code, and need to when each formula calculates, all not carry out grammer detection; By the relationship maps of formula table and parameters of formula table two bivariate table, each formula script is corresponding to the calculation process of any multinomial reality, and need to not re-define due to the difference of operand; The operation result of each formula can directly trigger the processing that facts object enters mode of rule matching layer, also can be used as intermediate result and participates in next formula operation.
4. the intelligent substation expert system based on editing formula script according to claim 2, it is characterized in that: described mode of rule matching layer, each condition can be preserved initial state information and the index of associated trigger object in rule match process, when rule meets, provide while analyzing conclusion, to contribute to collect rapidly, record relevant field data.
5. the intelligent substation expert system based on editing formula script according to claim 2, it is characterized in that: the discrete event dynamic comparison unit of described configurable effective time domain refers to concrete burst discrete event by type or effective time domain corresponding to period, beginning timing from occurring constantly, only the event in effective time domain just participates in regular the matching analysis, as long as when the effective time domain of all event conditions of rule occurs overlapping, when " the effectively time domain window " that rule is dynamically slided occurs, just the match is successful for rule.
6. the intelligent substation expert system based on editing formula script according to claim 2, it is characterized in that: described rule condition time delay comes into force and time delay is returned to trigger mechanism unit and referred to: to representing each input object and the intermediate computations amount object of process transient information, all be configured to the triggering of time limit threshold or the processing mode of reset facts object, take the duration as crucial triggering and reset foundation, thereby effectively filter out the unnecessary interference that process transient information brings, exactly fault and abnormal information are carried out to qualitative analysis.
7. the intelligent substation expert system based on editing formula script according to claim 2, it is characterized in that: the unit of automatically compiling of described configurable " before generation " and " after occurring " relevant field data refers to: for the rule of carrying out failure exception analysis, by format string form, the qualitative analysis is described and expert processes suggestion, the relevant information kind that need to collect when being activated and coming into force by " rule association processing list " configuration rule, corresponding device interval, period, initial time limit that simultaneously specified associations gathers and by the time limit, after when operation, rule match is activated and comes into force, expert system is when the very first time provides analysis result and suggestion, according to rule association configuration, the related information entry starting from the initial time limit will be searched for from input object list, together with rule analysis result, by the sequencing of time, gather and unify inventory list document for portion, as also having new related information to occur before arriving by the time limit, can be continued to add in this inventory list document last preservation under the saving contents of expert system appointment, if triggering rule is protective device action event, also fixed value adjusting, protection pressing plate state and the corresponding recorder data of collecting corresponding protective device are preserved simultaneously in the lump.
8. according to the intelligent substation expert system based on editing formula script one of claim 3 to 7 Suo Shu, it is characterized in that: the main transformer low-pressure side isolating switch of described transformer station is that main transformer protection is controlled, the feeder line end isolating switch of described transformer station is that protection for feed line is controlled, the fault analysis rule being triggered by main transformer low-pressure side protection action event, by the startup of subordinate's protection for feed line, action event, on off state, the out-of-limit information configuration of remote measurement, be the associated information gathering, the initial time limit of collection of simultaneously adjusting, the collection of adjusting are by the time limit; After main transformer low-pressure side overcurrent protection action; accident parameter, the action parameter of protection action itself are collected; the associated protection that gathers all subordinates feeder protection equipment in the time limit starts relevant information will be by real time record, and together with being summarised in corresponding protective device recorder data.
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