CN103823433A - Method for realizing relay protection equipment on-line monitoring by use of communication process analysis - Google Patents

Method for realizing relay protection equipment on-line monitoring by use of communication process analysis Download PDF

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CN103823433A
CN103823433A CN201410009182.9A CN201410009182A CN103823433A CN 103823433 A CN103823433 A CN 103823433A CN 201410009182 A CN201410009182 A CN 201410009182A CN 103823433 A CN103823433 A CN 103823433A
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index
communication
value
relay protection
time
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CN103823433B (en
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姚建华
俞京锋
赵俊
毛鸿飞
阮远峰
杨欢红
温杰
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Deqing Shin Electric Power Design Co., Ltd.
State net Zhejiang Deqing County electric company
State Grid Corp of China SGCC
Shanghai University of Electric Power
Huzhou Power Supply Co of State Grid Zhejiang Electric Power Co Ltd
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State Net Zhejiang Deqing County Electric Co
State Grid Corp of China SGCC
Shanghai University of Electric Power
Huzhou Power Supply Co of State Grid Zhejiang Electric Power Co Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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    • Y02P90/02Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]

Abstract

The invention discloses a method for realizing relay protection equipment on-line monitoring by use of communication process analysis. The method comprises two steps i.e., automatic extraction and calculation by an on-line monitoring indicator and on-line assessment by a protective relaying device. Compared to a conventional transformer station integrated automation relay apparatus, the advantages are as follows: a communication capability is utilized, a characteristic of forming an automation communication network in concrete applications is utilized, a communication monitoring mechanism independent from an automation system is constructed, and function performance characteristic parameters which reflect health states of relay protection equipment are extracted in an on-line mode, such that on-line monitoring of the relay protection equipment can be realized.

Description

A kind of method that uses communication process analysis to realize relay protection device on-line monitoring
Technical field
The present invention relates to relay protection device on-line monitoring technique.
Background technology
Repair based on condition of component is the important development direction that current electrical equipment dimension service work mode is changed, and realizing one of key element of repair based on condition of component is on-line monitoring and the state estimation of realizing electrical equipment state.In electric system, primary equipment is (as transformer, isolating switch, capacitor etc.) on-line condition monitoring technology and method reach its maturity, on-line monitoring system becomes the standard configuration of mesohigh power transmission and transforming equipment gradually, and smart machine (IED) Condition Monitoring Technology take microcomputer protective relay and synthesis observe and control device as representative is just at the early-stage, main detection means rests on the offline inspection under power failure pattern mostly at present, as utilize the turn(a)round periodically or after breaking down, adopt the AC measurment system of specific detecting instrument to smart machine, DC operation and signal system, logic judges system, communication system and bonding subsystem and element etc. carry out offline inspection.
Along with the development of Microcomputer Protection and microcomputer aut.eq. self-diagnosis technology, the particularly development of digital intelligent transformer station technology are perfect, for the status monitoring of smart machine has been established solid technical foundation.At present for integrated automation converting station, the Main Means of implementing status monitoring is to utilize self-diagnostic function that in protective device, each module has and the state of output thereof to launch.For example, the diagnostic routine that use device manufacturer provides, the diagnosis of patrolling of the plug-in units such as the power supply, CPU, I/O interface, A/D conversion, storer to device, adopt the method for the fault tests such as relative method, compiling method, check addition, watchdog timer method, tagged word method, automatically test each equipment and parts.But; owing to lacking the industry standard of unified comprehensive automation smart machine on-line condition monitoring; smart machine self-diagnostic function and the outputting standard disunities such as each manufacturer protection and measurement and control; maintenance and calibrating that the application of these self-diagnosis informations is mainly offline mode provide auxiliary automatic means; part is as alarm signal; enter SCADA system, be not well positioned to meet the needs of smart machine on-line condition monitoring and assessment.
One of key character of smart machine is that it has ability to communicate, in comprehensive automation system of transformer substation, the smart machine such as relay protection, observing and controlling adopts industrial bus technology, form automatic control communication network together with telecontrol equipment and background monitoring computing machine, the place one's entire reliance upon normal performance of each element function in this network of the performance of electric substation's monitoring function.In fact, function or the performance of the smart machines such as the relay protection, observing and controlling and the telemechanical that in system, relate to break down, to be embodied directly in the variation of the relevant communication performance parameter of automated system communication network, as network traffics, the bit error rate and delay time etc., therefore, dimension maintainer, usually by specific tool analysis communication packet, judges the behavior difference of relevant communication feature and expection, and then assesses the duty of automated system and the reason that trouble-shooting occurs.Although the communication function of some SCADA system can have been extracted relevant communication characteristic parameter automatically, only limit to the performance evaluation of SCADA system self.
At present, there are research and application, utilize transformer station's communication network performance index, as network traffics, the bit error rate etc., the anti-performance that pushes away the smart machine that forms robotization communication network, but these indexs are general network performance index, not associated with the functional characteristics of smart machine, although can partly reflect the performance of smart machine, can not be as the online technical indicator detecting of smart machine.In the GOOSE communications protocol of digital automation transformer station standard IEC 61850, define the functional performance index of reflection relay protection device, the index as the online detection of relay protection intelligent equipment by some researchs and application, but for most of traditional transformer stations, the smart machines such as the microcomputer protective relay of non-IEC61850 standard, also lack the online index system detecting, and the method for on-line automatic calculating and evaluation index system, thereby causing implementing the online means that detect of this class relay protection devices lacks, also do not set up relevant on-line monitoring application system.
Summary of the invention
Technical matters to be solved by this invention is just to provide a kind of method that uses communication process analysis to realize relay protection device on-line monitoring; alleviate the working strength of manual analysis communication packet, assessment smart machine performance deficiency; shorten working hours and promote assessment and the accuracy of judgment means fault; effectively eliminate the potential potential safety hazard of the smart machines such as relay protection; reduce the power failure risk causing because of secondary device defect, be conducive to promote the reliability of electric power system.
For solving the problems of the technologies described above, the present invention adopts following technical scheme: a kind of method that uses communication process analysis to realize relay protection device on-line monitoring, comprises two steps of the automatic extraction of online monitoring index and calculating and protective relaying device online evaluation, wherein, the process that on-line monitoring index is automatically extracted and calculated is: first, the general character communication function having for protective relaying device, builds the online detection index system with time correlation, secondly, by the time interval of setting, calculate once the detection index in above-mentioned online detection index system, accumulative total is many forms a time series in the future, and this time series represents with ETj, the process of protective relaying device online evaluation is: first, for time series ETj, go matching with straight line, by the slope of digital simulation straight line, after normalization, become the numerical value between-1 to 1, this numerical value represents as the eigenwert of describing for index with Ei, then, after multiple index eigenwerts are weighted on average by certain weight, dimensionless group between forming one 0~1, this dimensionless group represents with Ed, this dimensionless group has represented the degree of protective relaying device hydraulic performance decline, represent that with 100 protective relaying device is in absolute intact state, use so (1-Ed) * 100 to represent the health degree of protective relaying device, this health degree represents with H, H is the value between 0~100, the health degree that more approaches 100 expression relay protection devices is better, more approach on the contrary 0 expression health status poorer, 0 indication equipment is in cannot duty, by setting the lower limit of health degree, as alarm conditions, in the time that health degree is less than this threshold values, produce an alarm, remind dimension maintainer, need to carry out maintenance maintenance to relay protection devices.
Preferably, the general character communication function that protective relaying device has comprises:
(1) periodically export relay protection measuring value, comprise remote measurement, remote signalling value;
(2) in the time there is trip protection or other alarm events, target sequential affair record when output band;
(3) order is established in the remote control/distant of carrying out main website;
(4) the calling order of response monitoring system, returns to definite value or the remote measure and communication all data of protective relaying device.
Preferably, comprise with the online detection index system of time correlation:
(1) in the average transmission cycle of remote measure and communication, use the relay protection of different communication protocols, send remote measurement and remote signalling message by the different cycles;
(2) the SOE average delay time, when protective relaying device record after SOE, can initiatively send to supervisory system, the time that message sends has a mistiming with the time of SOE generation, the mean value of multiple this mistimings, has formed protective relaying device SOE average delay monitoring index;
(3) the average execution time of guidance command, the execution of guidance command, adopts the communication process of inquiring about/replying to complete, and between these two orders, has a mistiming, the mean value of the mistiming of multiple these class orders, has formed the average execution time monitoring index of protective relaying device guidance command;
(4) calling order average response time, calling order adopts inquiry/answering to complete, by calculating the poor mean value of query responding time of multiple calling orders, obtain calling order average response time index, if there is multiple calling order, the average response time monitoring index of multiple correspondences is set.
Preferably, the value of calculating ETj adopts the mode of monitoring the real-time communication message between background monitoring system and relay protection, utilizes index and communication packet to have incidence relation, adopts different computational logics automatically to calculate for different indexs.
Preferably, ETj the Fitting Calculation Ei is adopted to linear regression method, using the markers of obtaining ETj as X-axle point, ETj value, as Y-axle point, adopts the linear regression method of standard, the slope of digital simulation straight line, and slope is converted to angle, then by asking the mode of dextrorotation value, be converted to Ei.
Preferably, a synthetic multiple index eigenwert Ei health degree index H is adopted to average weighted mode, carries out as follows:
(1) calculate weighted mean value E=∑ CiEi, wherein Ci is weighted mean coefficient;
(2) calculate the health degree of protective relaying device by the formula of H=(1-E) * 100.
Preferably, weighted mean coefficient Ci has following two kinds of methods to obtain:
(1) importance to health degree according to the each index of artificial judgment, presets;
(2) on the basis of an initial value, adopt Artificial Neural Network, the self-adjusting ability of imparting system, deduces out each weighted mean coefficient.
Preferably, detect online the automatic extraction of index system and computation process and comprise following 6 steps:
Step 101 is determined type and the protocol type of protective relaying device, by the mode of configuration, pre-defined;
Step 102, according to the type of protective relaying device and protocol type, reads index of correlation, corresponding stipulations condition code and the account form of index from predefined " protective relaying device index and stipulations feature database ";
Step 103 captures communication packet, Grasp Modes can adopt communication monitor mode, and to the message grabbing by stipulations frame format, form whole frame, every frame is stamped to timestamp by the crawl time;
The step 104 stipulations condition code corresponding with on-line monitoring index mated, and the match is successful, records the timestamp of coupling frame;
Step 105, by index account form, judges whether to meet index design conditions, if do not met, returns to 103 steps, continues to capture message, if met, enters 106 steps;
Step 106 parameter value, stamps the value calculating to calculate moment markers, as a time series point, is saved in index time series, and returns to step 103, continues to calculate next time series index point.
Preferably, the process of protective relaying device online evaluation comprises following 4 steps:
The time series that step 201 calculates take current time is input parameter seasonal effect in time series eigenwert;
The weighted mean coefficient of step 202 parameter eigenwert, computing method are adopt the weighted mean coefficient pre-entering or deduce by neural net method the dynamic weighting mean coefficient that study obtains according to historical data;
Step 203 by corresponding weighted mean coefficient, is calculated each index eigenwert weighted mean value, and is formatted as the health value between 0~100;
Step 204, by predefined alarm threshold value, judges that whether health value is out-of-limit, if out-of-limit, produces alarm, and notifies operation maintenance personnel.
Preferably, the mode of alarm notification in step 204, adopts the mode of backstage man-machine interface notice or the mode of employing short message alarm.
The present invention is directed to traditional integrated automation of transformation stations relay equipment; utilization has ability to communicate; and in concrete application, form the feature of robotization communication network; be independent of the communication monitoring mechanism of automated system by structure; and at the functional performance characteristic parameter of line drawing reflection relay protection devices health status; realize the on-line monitoring of relay protection devices, for the secondary device on-line monitoring systems such as conventional integrated automation converting station protective relaying device build, provide a kind of brand-new implementation method.
By use of the present invention, solve the problem of (1) conventional Comprehensive Automation Substation relay protection device status monitoring difficulty; (2) because the smart machine hydraulic performance declines such as relay protection can not be found in time, the problem that causes the smart machine such as relay protection and observing and controlling function and whole electric substation monitoring function normally not to bring into play.
Adopt the beneficial effect after the present invention: (1) monitors analysis by communication, the relevant communications parameter of on-line automatic extraction reflection apparatus function performance, can greatly alleviate the working strength of manual analysis communication packet, assessment smart machine performance deficiency, shorten working hours and promote the accuracy of assessment and judgment means fault; (2) by continuous monitoring and the analysis to device of substation intelligent in 7*24 hour, can find in time the performance deficiency that the smart machines such as relay protection exist, and notify dimension maintainer by alarming mechanism, can effectively eliminate the potential potential safety hazard of the smart machines such as relay protection, reduce the power failure risk causing because of secondary device defect, be conducive to promote the reliability of electric power system.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the invention will be further described:
Fig. 1 is relay equipment on-line monitoring index extraction process flow diagram;
Fig. 2 is relay equipment state estimation process flow diagram.
Embodiment
The technical matters that the present invention mainly solves is to provide the method for a kind of relay protection performance index in line computation and assessment, and it comprises the automatic extraction of online monitoring index and calculating and two steps of protective relaying device online evaluation, wherein, the process that on-line monitoring index is automatically extracted and calculated is: first, the general character communication function having for protective relaying device, builds the online detection index system with time correlation, secondly, by the time interval of setting, calculate once the detection index in above-mentioned online detection index system, accumulative total is many forms a time series in the future, and this time series represents with ETj, the process of protective relaying device online evaluation is: first, for time series ETj, go matching with straight line, by the slope of digital simulation straight line, after normalization, become the numerical value between-1 to 1, this numerical value represents as the eigenwert of describing for index with Ei, then, after multiple index eigenwerts are weighted on average by certain weight, dimensionless group between forming one 0~1, this dimensionless group represents with Ed, this dimensionless group has represented the degree of protective relaying device hydraulic performance decline, represent that with 100 protective relaying device is in absolute intact state, use so (1-Ed) * 100 to represent the health degree of protective relaying device, this health degree represents with H, H is the value between 0~100, the health degree that more approaches 100 expression relay protection devices is better, more approach on the contrary 0 expression health status poorer, 0 indication equipment is in cannot duty, by setting the lower limit of health degree, as alarm conditions, in the time that health degree is less than this threshold values, produce an alarm, remind dimension maintainer, need to carry out maintenance maintenance to relay protection devices.
For versatility and the consideration of calculating automatically; on-line monitoring index system is selected need to be associated with the communications protocol of the function of relay protection device and employing; energy reaction time change to attributes, and be applicable to the mode that adopts communication to monitor, automatic continuous extraction from the communication packet of monitoring.Based on this thinking; the present invention is first for the conventional communications protocol of relay protection; set up the incidence relation between on-line monitoring index and relevant communication packet condition code; capture the condition code of association message by coupling; automatically calculate on-line monitoring index; form the time series of index, as shown in Figure 1.For the time series of each index; adopt specific assessment algorithm; computing time sequence eigenwert; for the eigenwert of multiple indexs; adopt average weighted method to calculate the health degree of reflection relay protection device health status; and by predefined threshold values, when exceeding threshold values, health degree produces alarm, the effect of estimating to reach relay equipment running status.As shown in Figure 2.
Above-mentioned relay protection performance index are in the method for line computation and assessment, and two steps of the automatic extraction of on-line monitoring index and calculating and protective relaying device online evaluation are specially.
As shown in Figure 1, the automatic extraction of on-line monitoring index and computation process comprise following 6 steps:
Step 101 is determined type and the protocol type of protective relaying device, conventionally by the mode of configuration, pre-defined;
Step 102, according to the type of protective relaying device and protocol type, reads index of correlation, corresponding stipulations condition code and the account form of index from predefined " protective relaying device index and stipulations feature database ".
Step 103 captures communication packet, Grasp Modes can adopt communication monitor mode, and to the message grabbing by stipulations frame format, form whole frame, every frame is stamped to timestamp by the crawl time.
The step 104 stipulations condition code corresponding with on-line monitoring index mated, and the match is successful, records the timestamp of coupling frame.
Step 105, by index account form, judges whether to meet index design conditions, if do not met, returns to 103 steps, continues to capture message, if met, enters 106 steps.
Step 106 parameter value, the value calculating is stamped and calculated moment markers, as a time series point, be saved in index time series (when predefined of operation is counted in preservation, remove the point of preserving at first), and return to step 103, continue to calculate next time series index point.
As Fig. 2. as shown in, the process of protective relaying device online evaluation comprises following 4 steps:
The time series that step 201 calculates take current time is input, parameter seasonal effect in time series eigenwert, and computing method can be the linear regression methods of standard, can be also other linear fit method;
The weighted mean coefficient of step 202 parameter eigenwert, computing method can be the simple weighted mean coefficients pre-entering that adopts, and can be also to deduce by neural net method the dynamic weighting mean coefficient that study obtains according to historical data.
Step 203 by corresponding weighted mean coefficient, is calculated each index eigenwert weighted mean value, and is formatted as the health value between 0~100.
Step 204, by predefined alarm threshold value, judges that whether health value is out-of-limit, if out-of-limit, produces alarm, and adopts suitable mode to notify operation maintenance personnel.The mode of alarm notification, can adopt the mode of backstage man-machine interface notice, also can adopt the mode of short message alarm.
Based on the consideration of versatility, first the present invention has following general character communication function for protective relaying device:
(1) periodically export relay protection measuring value, comprise remote measurement, remote signalling value.
(2) in the time there is trip protection or other alarm events, target sequential affair record (SOE) when output band.
(3) order is established in the remote control/distant of carrying out main website;
(4) the calling order of response monitoring system, returns to definite value or the remote measure and communication all data of protective relaying device.
Build the online detection index system with time correlation.Comprise:
(1) the average transmission cycle of remote measure and communication.Use the relay protection of different communication protocols, may send remote measurement and remote signalling message by the different cycles, as adopted the communication protocol of IEC103, remote measurement message periodically sends, and remote signalling etc. need to be returned by total calling again.And the CSC2000 communications protocol of four directions, Beijing company, by different communication packets, periodically sends remote measurement and remote signalling data, in this case, need to, for sending message classification, build multiple average transmission cycle monitoring indexs.
(2) the SOE average delay time; when protective relaying device record after SOE; can initiatively send to supervisory system; the time (markers of SOE) that the time that message sends and SOE produce has a mistiming; the mean value of multiple this mistimings, has formed protective relaying device SOE average delay monitoring index.
(3) the average execution time of guidance command; the execution of guidance command, the general communication process of inquiring about/replying that adopts completes, and between these two orders, has a mistiming; the mean value of the mistiming of multiple these class orders, has formed the average execution time monitoring index of protective relaying device guidance command.
(4) calling order average response time, similar with control command, general inquiry/the answering that adopts of calling order completes, by calculating the poor mean value of query responding time of multiple calling orders, can obtain calling order average response time index, on average to send cyclical indicator the same with remote measurement/remote signalling, if there is multiple calling order, the average response time monitoring index of multiple correspondences can be set.
Under normal circumstances, these indexs of protective relaying device can change near a reference value.If by certain time interval, such as 1 day, calculates one time These parameters,, just can form a time series (representing with ETj), be placed in " time m-desired value " coordinate system more than accumulative total in the future, its variation tendency should approach a straight line stably.If these indexs continue to rise, mean the hydraulic performance decline of protective relaying device, health degree reduces.Therefore, for the time series of desired value, can go matching with straight line, by the slope of digital simulation straight line, after normalization, become numerical value between (1,1) (representing with Ei), as the eigenwert of describing for index.The eigenwert of multiple indexs; after can being weighted on average by certain weight; dimensionless group between forming one 0~1 (representing with Ed); this parameter has represented the degree of protective relaying device hydraulic performance decline; if represent that with 100 protective relaying device is in absolute intact state, can represent with (1-Ed) * 100 so the health degree (representing with H) of protective relaying device.H is the value between 0~100, and the health degree that more approaches 100 expression relay protection devices is better, more approaches on the contrary 0 expression health status poorer, and 0 indication equipment is in cannot duty.Therefore, can pass through to set the lower limit of health degree, as be set as 60 as alarm conditions, in the time that health degree is less than this threshold values, produce an alarm, remind dimension maintainer, need to carry out maintenance maintenance to relay protection devices.By this method, reach the online object detecting of protective relaying device.
In above-mentioned online detection implementation process, also have three problems to need to solve:
The first, how automatically calculate the value of ETj?
Does the second, how fitting index time series, obtain Ei?
Three, the weight of How to choose Ei, to synthesize health degree H?
For first problem, the present invention adopts the mode of monitoring the real-time communication message between background monitoring system and relay protection, utilizes index and communication packet to have incidence relation, adopts different computational logics automatically to calculate for different indexs.Take Beijing four directions relay protection communication protocol CSC2000 of company as example, after the normal operation of relay equipment, can be by the cycle of setting, such as 10 seconds, periodically above send out full remote measurement, remote signalling or remote measure and communication mixing message entirely.CSC2000 agreement is distinguished this class message by " type of message code 0x30 "+" data type code ", for full remote signalling, data type code is 0x07, for full remote measurement, data type code can be 0x20~0x2F or 0x30~0x3F, and for remote measurement/remote signalling mixing message, data type can be 0x40~4E or 0x50~0x5F or 0x60~60F.Relative process is as follows:
1.1 systems capture communication packet constantly, and automatically type of message and data type code are mated, and when matching while delivering newspaper literary composition on the cycle, system is made a mark, and the time scale value that receives of record,
If 1.2 have matched the message of a same type above, and centre is not inserted order/SOE/ and is called message, obtain a monitoring index by the markers of the markers-upper similar message of nearest message and calculate middle point value, and this value is saved temporarily.
1.3 a predefined cycle, as 1 hour, inside by the 1.2nd) step can calculate multiple index intermediate values, by these values calculate do sums average, the desired value ETj. having formed at given time
Because communication monitoring technique is mature technology, therefore said process can be completed by system completely automatically in manual intervention.For using different communication protocols; the protective relaying device that type is different; index and communication protocol message characteristic code and account form can be organized in advance; be kept in " relay protection performance index and stipulations feature database ", aforesaid like this index has just had versatility at line drawing and computing method.
For by the problem of ETj the Fitting Calculation Ei, can there be a lot of methods, the present invention adopts linear regression method, using the markers of obtaining ETj as X-axle point, ETj value, as Y-axle point, adopts the linear regression method of standard, the slope of digital simulation straight line, and slope is converted to angle, then by asking the mode of dextrorotation value (sin), be converted to Ei.This is the value between-1 to 1, for the situation of <0, casts out and becomes 0, and like this, this value is larger, represents sooner for the hydraulic performance decline of this index, and this can reflect the performance state of protective relaying device well.
For the problem of multiple index eigenwert Ei being synthesized to a health degree index H, the present invention adopts average weighted mode, carries out as follows:
2.1 calculate weighted mean value E=∑ CiEi, and wherein Ci is weighted mean coefficient, can (1) according to the each index of artificial judgment the importance to health degree, preset; (2) also can, on the basis of an initial value, adopt Artificial Neural Network, such as BP neural computing method, the self-adjusting ability of imparting system, deduces out each weighting coefficient.
2.2 calculate the health degree of protective relaying device by the formula of H=(1-E) * 100.

Claims (10)

1. use communication process analysis to realize a method for relay protection device on-line monitoring, it is characterized in that: comprise two steps of the automatic extraction of online monitoring index and calculating and protective relaying device online evaluation, wherein, the process that on-line monitoring index is automatically extracted and calculated is: first, the general character communication function having for protective relaying device, builds the online detection index system with time correlation, secondly, by the time interval of setting, calculate once the detection index in above-mentioned online detection index system, accumulative total is many forms a time series in the future, and this time series represents with ETj, the process of protective relaying device online evaluation is: first, for time series ETj, go matching with straight line, by the slope of digital simulation straight line, after normalization, become the numerical value between-1 to 1, this numerical value represents as the eigenwert of describing for index with Ei, then, after multiple index eigenwerts are weighted on average by certain weight, dimensionless group between forming one 0~1, this dimensionless group represents with Ed, this dimensionless group has represented the degree of protective relaying device hydraulic performance decline, represent that with 100 protective relaying device is in absolute intact state, use so (1-Ed) * 100 to represent the health degree of protective relaying device, this health degree represents with H, H is the value between 0~100, the health degree that more approaches 100 expression relay protection devices is better, more approach on the contrary 0 expression health status poorer, 0 indication equipment is in cannot duty, by setting the lower limit of health degree, as alarm conditions, in the time that health degree is less than this threshold values, produce an alarm, remind dimension maintainer, need to carry out maintenance maintenance to relay protection devices.
2. use communication process according to claim 1 analysis realizes the method for relay protection device on-line monitoring, it is characterized in that: the general character communication function that protective relaying device has comprises:
(1) periodically export relay protection measuring value, comprise remote measurement, remote signalling value;
(2) in the time there is trip protection or other alarm events, target sequential affair record when output band;
(3) order is established in the remote control/distant of carrying out main website;
(4) the calling order of response monitoring system, returns to definite value or the remote measure and communication all data of protective relaying device.
3. use communication process according to claim 1 analysis realizes the method for relay protection device on-line monitoring, it is characterized in that: comprise with the online detection index system of time correlation:
(1) in the average transmission cycle of remote measure and communication, use the relay protection of different communication protocols, send remote measurement and remote signalling message by the different cycles;
(2) the SOE average delay time, when protective relaying device record after SOE, can initiatively send to supervisory system, the time that message sends has a mistiming with the time of SOE generation, the mean value of multiple this mistimings, has formed protective relaying device SOE average delay monitoring index;
(3) the average execution time of guidance command, the execution of guidance command, adopts the communication process of inquiring about/replying to complete, and between these two orders, has a mistiming, the mean value of the mistiming of multiple these class orders, has formed the average execution time monitoring index of protective relaying device guidance command;
(4) calling order average response time, calling order adopts inquiry/answering to complete, by calculating the poor mean value of query responding time of multiple calling orders, obtain calling order average response time index, if there is multiple calling order, the average response time monitoring index of multiple correspondences is set.
4. use communication process according to claim 1 analysis realizes the method for relay protection device on-line monitoring; it is characterized in that: the value of calculating ETj adopts the mode of monitoring the real-time communication message between background monitoring system and relay protection; utilize index and communication packet to there is incidence relation, adopt different computational logics automatically to calculate for different indexs.
5. use communication process according to claim 1 analysis realizes the method for relay protection device on-line monitoring; it is characterized in that: ETj the Fitting Calculation Ei is adopted to linear regression method; using the markers of obtaining ETj as X-axle point; ETj value is as Y-axle point; the linear regression method of employing standard, the slope of digital simulation straight line, and slope is converted to angle; by asking the mode of dextrorotation value, be converted to Ei again.
6. use communication process according to claim 1 analysis realizes the method for relay protection device on-line monitoring, it is characterized in that: a synthetic multiple index eigenwert Ei health degree index H is adopted to average weighted mode, carry out as follows:
(1) calculate weighted mean value E=∑ CiEi, wherein Ci is weighted mean coefficient;
(2) calculate the health degree of protective relaying device by the formula of H=(1-E) * 100.
7. use communication process according to claim 6 analysis realizes the method for relay protection device on-line monitoring, it is characterized in that: weighted mean coefficient Ci has following two kinds of methods to obtain:
(1) importance to health degree according to the each index of artificial judgment, presets;
(2) on the basis of an initial value, adopt Artificial Neural Network, the self-adjusting ability of imparting system, deduces out each weighted mean coefficient.
8. use communication process according to claim 1 analysis realizes the method for relay protection device on-line monitoring, it is characterized in that: detect online the automatic extraction of index system and computation process and comprise following 6 steps:
Step 101 is determined type and the protocol type of protective relaying device, by the mode of configuration, pre-defined;
Step 102, according to the type of protective relaying device and protocol type, reads index of correlation, corresponding stipulations condition code and the account form of index from predefined " protective relaying device index and stipulations feature database ";
Step 103 captures communication packet, Grasp Modes can adopt communication monitor mode, and to the message grabbing by stipulations frame format, form whole frame, every frame is stamped to timestamp by the crawl time;
The step 104 stipulations condition code corresponding with on-line monitoring index mated, and the match is successful, records the timestamp of coupling frame;
Step 105, by index account form, judges whether to meet index design conditions, if do not met, returns to 103 steps, continues to capture message, if met, enters 106 steps;
Step 106 parameter value, stamps the value calculating to calculate moment markers, as a time series point, is saved in index time series, and returns to step 103, continues to calculate next time series index point.
9. use communication process according to claim 1 analysis realizes the method for relay protection device on-line monitoring, it is characterized in that: the process of protective relaying device online evaluation comprises following 4 steps:
The time series that step 201 calculates take current time is input parameter seasonal effect in time series eigenwert;
The weighted mean coefficient of step 202 parameter eigenwert, computing method are adopt the weighted mean coefficient pre-entering or deduce by neural net method the dynamic weighting mean coefficient that study obtains according to historical data;
Step 203 by corresponding weighted mean coefficient, is calculated each index eigenwert weighted mean value, and is formatted as the health value between 0~100;
Step 204, by predefined alarm threshold value, judges that whether health value is out-of-limit, if out-of-limit, produces alarm, and notifies operation maintenance personnel.
10. use communication process according to claim 9 analysis realizes the method for relay protection device on-line monitoring, it is characterized in that: the mode of alarm notification in step 204, adopts the mode of backstage man-machine interface notice or the mode of employing short message alarm.
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