CN104680020B - Relay protection system reliability online evaluation system based on SCD - Google Patents
Relay protection system reliability online evaluation system based on SCD Download PDFInfo
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Abstract
A kind of field of power is based on the relay protection On-line Reliability Estimation system of SCD, including：Network communication module, human-machine interface module, model analyzing module, data processing module, reliability evaluation module, the present invention obtain protection system composition proposal and primary element and are converted to RBD by parsing SCD file；Intermediate data of SV, GOOSE, MMS Message processing of protection system operation conditions into needed for Calculation of Reliability will be reflected; based on Reliability Analysis Theory, RBD and reliability algorithm; complete to be analyzed for the static and On-line Reliability Estimation of various protection systems; the present invention realizes the static state and On-line Reliability Estimation of intelligent substation protection system; the hidden danger of relay protection system can effectively be found; it is that the state estimation based on fail-safe analysis lays the foundation; the availability of relay protection system is improved, for the safe operation of power network provides reliable guarantee.
Description
Technical field
The present invention relates to a kind of reliability of relay protection assessment technology of technical field of power systems, specifically one kind is based on
The relay protection system reliability online evaluation system of SCD.
Background technology
Microcomputer Protection main composition element is electronic component, but for a long time for Microcomputer Protection reliability assessment only
The theory analysis stage is only rested on, never into practical engineering application field.Intelligent power transformation based on IEC61850 standards
Protection system of standing is constituted more than conventional comprehensive complexity certainly, such as be increased combining unit, intelligent terminal, process layer switch physics and is set
Standby, protection occurs in that the different application model of " directly adopting straight jump ", " directly adopting net to jump ", " net is adopted net and jumped ".At the same time, protection system
Information possess by SV, GOOSE, MMS network online obtain possibility.Therefore, under intelligent substation technical background, after
The reliability on-line evaluation of electric protection system possesses Necessity and feasibility.
Found by the retrieval to prior art, Chinese patent literature CN102136113A discloses (bulletin) day
2011.07.27, a kind of reliability assessment scheme for secondary system of intelligent substation is disclosed, using reliability block diagram, adjacency matrix
With the Reliability Evaluation Model that minimal path sets technology sets up secondary system of intelligent substation；Estimate basis device reliability is carried out
On carry out the calculating of system overall reliability and by component importance analysis be incorporated into electrical secondary system, using probabilistic compct and pass
Key importance degree is implemented secondary system of intelligent substation component importance and is evaluated；According to reliability assessment result, analyzing influence system
The weak link of reliability, takes the reliability of the measure raising system of system structure optimization and equipment redundancy, fully meets
The new demand of intelligent substation.The technical method is applied to the reliability assessment of intelligent substation of electric power system electrical secondary system.But
What the technology was illustrated is general reliability analysis technology scheme, is not based on the transforming plant protecting system architecture that SCD is covered
With configuration relation, targetedly fail-safe analysis is carried out, the different protection structure modes that embodiment SCD is reflected are (as directly adopted
It is straight to jump, straight adopt that net is jumped, net is adopted net and jumped) difference in fail-safe analysis, being also not carried out can based on the online of real-time packet information
By property assessment.
Chinese patent literature CN103559287A discloses (bulletin) day 2014.02.05, discloses a kind of based on SCD texts
The intelligent substation protection system reliability automatic analysis method of part, comprises the following steps：1) SCD file is read, is protected
The predicate expressions in the empty terminal of each IED and empty loop in system；2) according to the predicate expressions, patrolling for protection system is generated
Collect connection figure and its predicate expressions；3) predicate expressions according to logic connectivity diagram carry out predicate calculus, identification protecting system
Physical connection, and generate the physical connection figure of protection system；4) physical connection figure is converted into the reliability frame of protection system
Figure；5) calculating of reliability index is carried out to protection system according to reliability block diagram.But the technology only realizes static reliable
Property assessment, On-line Reliability Estimation is not solved the problems, such as；Second, not proposing the protection system reliability test and appraisal based on interval
Scheme；Third, without reference to the information processing mechanism for reflection protection running status.
The content of the invention
The present invention is directed to deficiencies of the prior art, proposes a kind of relay protection system reliability based on SCD
Online evaluation system, by parsing SCD file, the protection system allocation plan for obtaining each interval (such as " directly adopting straight jump ", " is directly adopted
Net jump ", " net is adopted net and is jumped ", substance configuration, duplicate system retrofit etc.) and the physical equipment of protection system is constituted (as merging is single
Unit, protection device, intelligent terminal, process layer switch, connection optical cable etc.) primary element；And by protection system allocation plan
Be converted to the RBD (Reliability Block Diagram, reliability block diagram) based on physical equipment function connecting relation.
On the basis of this, SV, GOOSE, MMS original message of protection system operation conditions will be reflected, be processed into needed for Calculation of Reliability
Intermediate data；Based on Reliability Analysis Theory and algorithm, for the RBD of protection system, the static state for carrying out various protection systems can
By property analysis and assessment；By the online treatment for obtaining message information, the intermediate data needed for constituting reliability assessment completes online
Reliability assessment is analyzed.
The present invention is achieved by the following technical solutions：
The present invention includes：Network communication module, human-machine interface module, model analyzing module, data processing module, reliability
Evaluation module, wherein：The SCD file that human-machine interface module will be received is exported to model analyzing module and received from model analyzing
The primary element that module is parsed, human-machine interface module foundation Reliability Analysis Theory and man-machine interaction mode, to primary element
Reliability modeling is carried out, and the reliability model of primary element is delivered into reliability evaluation module；Model analyzing module is to receiving
SCD file parse and obtain protection system allocation plan, be converted to the RBD of protection system, and export to reliability evaluation
Module；Network communication module is by SV, GOOSE, MMS network, the original message information of collection reflection protection system operation conditions
And export to data processing module, data processing module is by SV, GOOSE, MMS Message processing in original message information into reliability
Property simulation analysis needed for intermediate data, and export to reliability evaluation module；Reliability evaluation module is according to fail-safe analysis
Theoretical and Reliablility simulation algorithm, the RBD of reliability model, protection system to primary element, intermediate data are protected
Static system fail-safe analysis and On-line Reliability Estimation are analyzed, and assessment result is delivered into data processing module preservation.
For model primary element refer to：Physical equipment (containing connection) composition of protection system is constituted, protection system
The reliability that reliability depends on primary element is combined.
Described reliability model refers to：Which kind of characteristic the failure and repair rate of element obey, and such as correspond to without electronics unit
The element of device feature, such as connection optical cable, can use preset parameter model；Element with electronic component feature uses index
Distribution or Two-parameter Weibull distribution model.
Described protection system reliability block diagram RBD refers to：Describe each in protection system with the analysis method of structure-oriented
The physical connection and function logic graph of a relation of unit, build the protection system fundamental diagram with physical equipment as object, such as " close
And unit+connection optical cable+protection device+connection optical cable+process layer switch+connection optical cable+intelligent terminal ", constitute protection system
System etc..
Described protection system includes：Positioned at transformer substation side, the combining unit for gathering transformer analog quantity information, protect
Protection unit, the intelligent end device and related secondary connecting loop that are coupled breaker and isolation switch.
Described original message information includes：Real-time SV, GOOSE and MMS message, such as reflection protection system operation conditions,
Such as protection system puts into operation, overhauls；Protection system (containing secondary circuit) health status, such as message is interrupted, device hardware anomalies are accused
Police, software alarm etc..
Described primary element includes：The separate physical form equipment of protection system logic function relation is constituted, is such as merged
Unit (containing intelligent terminal is merged), protection device, process layer switch, intelligent terminal, connection optical cable etc.：
Described intermediate data refers to：After calculating requirement treatment according to Reliablility simulation for original message, can directly use
In the data that Reliablility simulation is calculated.Such as it is based on dangerous acupoint (HAZOP, Hazard and
Operability), in table 1 the reason for, belongs to intermediate data, and deviation belongs to initial data.
The intelligent substation protection system HAZOP of table 1 is analyzed
Described protection system allocation plan refers to：For the protection system that the primary element of required protection is configured, such as
The constituted mode of substance, dual scheme and relaying configuration scheme, such as：1) " directly adopt and directly jump " scheme：I.e. protection device with
Take " point-to-point " optical cable direct-connected between combining unit, directly gather SV messages；" point is used between protection device and intelligent terminal
To point " optical cable is direct-connected, obtains circuit-breaker status information, and export breaker tripping and closing order；2) " net is directly adopted to jump " scheme：That is protection device
Take " point-to-point " optical cable direct-connected between combining unit, directly gather SV messages；Through handing between protection device and intelligent terminal
Change planes connection, obtain circuit-breaker status information, and export breaker tripping and closing order；3) " net is adopted net and jumped " scheme：I.e. protection device with close
And taken between unit through interchanger connection, gather SV messages；Couple through interchanger between protection device and intelligent terminal, obtain
Circuit-breaker status information, and export breaker tripping and closing order etc..
Technique effect
Prior art is compared, and the present invention obtains the composition proposal of each protection system by parsing SCD file, builds protection
The reliability analysis model of system primary element；The composition proposal of protection system is converted into RBD.It is online to obtain reflection protection system
The original message of operation conditions of uniting, the intermediate data needed for being processed into fail-safe analysis；According to protection system primary element reliability
Property model, reliability block diagram and intermediate data, realize intelligent substation protection system static state or On-line Reliability Estimation, can have
Effect finds the hidden danger of relay protection system, is that the state estimation based on fail-safe analysis lays the foundation, and improves relay protection system
Availability, for the safe operation of power network provides reliable guarantee.
Brief description of the drawings
Fig. 1 is schematic structural view of the invention.
Fig. 2 is the schematic flow sheet of embodiment 1.
Specific embodiment
Embodiments of the invention are elaborated below, the present embodiment is carried out under premised on technical solution of the present invention
Implement, give detailed implementation method and specific operating process, but protection scope of the present invention is not limited to following implementations
Example.
Embodiment 1
As shown in figure 1, the present embodiment includes：At network communication module, human-machine interface module, model analyzing module, data
Reason module, reliability evaluation module, wherein：The SCD file that human-machine interface module will be received is exported to model analyzing module and connect
The primary element that receipts are parsed from model analyzing module, human-machine interface module is according to Reliability Analysis Theory and man-machine interaction side
Formula, Reliability modeling is carried out to primary element, and the reliability model of primary element is delivered into reliability evaluation module；Model solution
Analysis module to the SCD file for receiving parse and obtains protection system allocation plan, is converted to the RBD of protection system, and export
To reliability evaluation module；Network communication module reflects protection system operation conditions by SV, GOOSE, MMS network, collection
Original message information is simultaneously exported to data processing module, need of the data processing module according to Reliability Simulation Analysis for data
Ask, it is by intermediate data of SV, GOOSE, MMS Message processing in original message information into needed for Reliability Simulation Analysis and defeated
Go out to reliability evaluation module；Reliability evaluation module according to Reliability Analysis Theory and Reliablility simulation algorithm, to basic
The reliability model of element, the RBD of protection system, intermediate data carry out protection system Static Reliability Analysis of Power and online reliability
Analysis and assessment, and assessment result is delivered into data processing module preservation.Thus, the relay protection system reliability based on SCD is completed
Property assessment.
Described network communication module includes：Network communication unit and data transmission unit, wherein：Network communication unit point
The system operation original message of Self-Protection Subsystem and the reliability assessment data call request from power network Jie Shou not come；Data
Original message is delivered to data processing module by transmission unit, and calls data processing module according to the call request from power network
Data.
Described human-machine interface module includes：Data read in unit, human-machine operation unit and visual presentation unit, its
In：Data are read in unit and obtain SCD file and export to model analyzing module；Human-machine operation unit receives artificial operational order,
Read SCD file and Reliability modeling is carried out to primary element；Visual presentation unit is received and comes from data processing module data
The information of processing unit, using technologies such as QT, realizes the visual presentation of reliability assessment result.
Described model analyzing module includes：Model analyzing unit, RBD converting units, wherein：Model analyzing unit pair
SCD file is parsed and is obtained constituting the basic of various protection systems (such as route protection, tranformer protection, bus protection)
Element (such as combining unit, protection device, process layer switch, intelligent terminal, couple optical cable etc.), and it is sent to human-machine interface mouth mold
Block；The configuration of protection system is converted to the RBD based on physical connection and function logic relation, and export extremely by RBD converting units
Reliability assessment module.
Described data processing module supports human-machine interface module calling for data, and the module includes：Data processing
Unit, data storage cell, wherein：Original message is processed into intermediate data by data processing unit, and is received from human-machine interface
Mouth mold block is called for reliability assessment result；Data storage cell preserve the assessment result from reliability assessment module with
And intermediate data.
Described reliability evaluation module includes：Static evaluation unit and online evaluation unit, wherein：Static evaluation unit
The RBD of primary element reliability model and model analyzing module from human-machine interface module is received, is calculated according to fail-safe analysis
Method, assesses protection system static reliability；Online evaluation unit, with reference to RBD, intermediate data and Strategies of Maintenance, according to reliability
Parser, realizes the On-line Reliability Estimation of protection system.
Described fail-safe analysis algorithm refers to：Algorithm for reflecting device or the various indexs of system reliability, such as may be used
By degree R, its expression formula is：R (t)=e-λt；Mean time to failure, MTTFWherein：λ is the crash rate of equipment or system, is lost
Efficiency is often what is changed over time, and so-called " tub curve " shape is presented, and accurate descriptive model is distributed for Weibull：Wherein：α is the form parameter of Weibull distributions.When α=1, its crash rate is constant,
Become exponential distribution, etc..
Thus, the reliability of relay protection online evaluation based on SCD is completed.
As shown in Fig. 2 the system is operated in the following manner：
S100：By user-machine interface, SCD file is obtained, parsing obtains protection system, and (circuit, transformer, bus are protected
Shield etc.) composition proposal (such as " directly adopt straight jump ", " directly adopting net to jump ", " net is adopted net and jumped "), and composition protection system is basic
Element (such as combining unit, protection device, process layer switch, intelligent terminal, connection optical cable).
S200：By user-machine interface, the Reliability modeling of protection system primary element is completed.
S300：The protection system composition proposal obtained after SCD will be parsed, protection system RBD is converted to, as reliability point
The input data source of analysis.
S400：The online running status message information (initial data) for obtaining protection system, according to Reliability Analysis Theory,
Intermediate data needed for being processed into fail-safe analysis.
S500：According to protection system primary element reliability model, RBD, and intermediate data, managed using fail-safe analysis
By and algorithm, carry out the Static Reliability Analysis of Power based on protection system RBD, or the online reliability based on running state information point
Analysis；
Thus, the protection system reliability assessment based on SCD is completed.
Protection system reliability assessment technology of the present invention based on SCD, can automatically generate protection by parsing SCD file
System reliability block diagram, using the online protection running state information for obtaining, based on reliability assessment theory and algorithm, is carried out quiet
State or On-line Reliability Estimation, can effectively find defect and hidden failure risk that relay protection is present, improve relay protection system
The availability of system, for the repair based on condition of component for advancing relay protection system lays the foundation.
Claims (7)
1. a kind of relay protection system reliability online evaluation system based on SCD, it is characterised in that including：Network service mould
Block, human-machine interface module, model analyzing module, data processing module, reliability evaluation module, wherein：Human-machine interface module will
The SCD file for receiving is exported to model analyzing module, and receives the primary element parsed from model analyzing module；Human-machine interface
Mouth mold block carries out Reliability modeling to primary element according to Reliability Analysis Theory and man-machine interaction mode, and by primary element
Reliability model deliver to reliability evaluation module；Model analyzing module to the SCD file for receiving parse and obtains protection system
System allocation plan, is converted to the RBD of protection system, and export to reliability evaluation module；Network communication module connection SV,
GOOSE, MMS network, the original message information of collection reflection protection system operation conditions are simultaneously exported to data processing module；Data
Intermediate data of the processing module by SV, GOOSE, MMS Message processing in original message information into needed for Reliability Simulation Analysis,
And export to reliability evaluation module；Reliability evaluation module is right according to Reliability Analysis Theory and Reliablility simulation algorithm
The reliability model of primary element, the RBD of protection system, intermediate data carry out protection system Static Reliability Analysis of Power and online may be used
By property analysis and assessment, and assessment result is delivered into data processing module preservation.
2. the relay protection system reliability online evaluation system based on SCD according to claim 1, it is characterized in that, institute
The network communication module stated includes：Network communication unit and data transmission unit, wherein：Network communication unit receives come from respectively
The system operation original message of protection system, and the request of the reliability assessment data call from power network；Data transmission unit
Original message is delivered into data processing module, and the data of data processing module are called according to the call request from power network.
3. the relay protection system reliability online evaluation system based on SCD according to claim 1, it is characterized in that, institute
The human-machine interface module stated includes：Data read in unit, human-machine operation unit and visual presentation unit, wherein：Data are read in
Unit obtains SCD file and exports to model analyzing module；Human-machine operation unit receives artificial operational order, reads SCD file
And Reliability modeling is carried out to primary element；Visual presentation unit receives the information from data processing module, using QT skills
Art, realizes the visual presentation of reliability assessment result.
4. the relay protection system reliability online evaluation system based on SCD according to claim 1, it is characterized in that, institute
The model analyzing module stated includes：Model analyzing unit, RBD converting units, wherein：Model analyzing unit is carried out to SCD file
Parse and obtain to constitute the primary element of various protection systems and be sent to human-machine interface module；RBD converting units will be protected
The configuration of system, is converted to the RBD based on physical connection and function logic relation, and export to reliability assessment module.
5. the relay protection system reliability online evaluation system based on SCD according to claim 1, it is characterized in that, institute
The data processing module stated includes：Message process unit and data storage cell, wherein：Message process unit is by original message
Intermediate data is managed into, data storage cell preserves assessment result and intermediate data from reliability assessment module.
6. the relay protection system reliability online evaluation system based on SCD according to claim 1, it is characterized in that, institute
The reliability evaluation module stated includes：Static evaluation unit and online evaluation unit, wherein：Static evaluation unit is received and comes from people
The primary element reliability model of machine interface module and the RBD of model analyzing module；According to fail-safe analysis algorithm, assessment is protected
Protecting system static reliability；Online evaluation unit combination RBD, intermediate data and Strategies of Maintenance, it is real according to Reliability Evaluation Algorithm
The On-line Reliability Estimation of existing protection system.
7. a kind of reliability online evaluation method according to any system in claim 1~6, it is characterised in that including
Following steps：
S100：By user-machine interface, SCD file is obtained, parsing obtains the composition proposal of protection system and constitutes protection
The primary element of system；
S200：By user-machine interface, the Reliability modeling of protection system primary element is completed；
S300：The protection system composition proposal obtained after SCD will be parsed, protection system RBD is converted to, as fail-safe analysis
Input data source；
S400：The online running status message information for obtaining protection system, according to Reliability Analysis Theory, is processed into reliability point
Intermediate data needed for analysis；
S500：According to protection system primary element reliability model, RBD and intermediate data, using Reliability Analysis Theory and
Algorithm, carries out the Static Reliability Analysis of Power based on protection system RBD, or the online fail-safe analysis based on running state information；
Thus, the protection system reliability assessment based on SCD is completed.
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| CN105048639A (en) * | 2015-09-11 | 2015-11-11 | 国家电网公司 | SCD (substation configuration description) modeling-based substation power source system monitoring system |
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| CN106059838B (en) * | 2016-07-29 | 2019-03-12 | 广东工业大学 | A kind of reliability of relay protection calculation method and device |
| CN109818336B (en) * | 2017-11-21 | 2020-11-10 | 上海毅昊信息科技股份有限公司 | Relay protection system intelligent operation and maintenance strategy generation system and method based on SCD |
| CN108596445A (en) * | 2018-04-03 | 2018-09-28 | 国网江苏省电力有限公司检修分公司 | Intelligent substation relay-protection pressing plate status assessing system |
| CN109491910B (en) * | 2018-11-07 | 2021-06-29 | 紫光测控有限公司 | Visual simulation debugging method and system for protection logic and control logic |
| EP3770709B1 (en) * | 2019-07-24 | 2022-03-30 | Siemens Energy Global GmbH & Co. KG | Method for operating an automated technical installation |
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