CN108183482B - A kind of method of intelligent substation digitlization secondary circuit presence assessment - Google Patents

A kind of method of intelligent substation digitlization secondary circuit presence assessment Download PDF

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Publication number
CN108183482B
CN108183482B CN201810096088.XA CN201810096088A CN108183482B CN 108183482 B CN108183482 B CN 108183482B CN 201810096088 A CN201810096088 A CN 201810096088A CN 108183482 B CN108183482 B CN 108183482B
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secondary circuit
digitlization
intelligent substation
evaluation index
link
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CN108183482A (en
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叶远波
纪陵
陈实
谢民
王同文
程晓平
杨小凡
邵庆祝
刘文彪
王薇
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State Grid Anhui Electric Power Co Ltd
Nanjing SAC Automation Co Ltd
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State Grid Anhui Electric Power Co Ltd
Nanjing SAC Automation Co Ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
    • H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)

Abstract

The present invention provides a kind of method of intelligent substation digitlization secondary circuit presence assessment.The following steps are included: building digitlization secondary circuit object model；Determine the key node of intelligent substation digitlization secondary circuit status assessment；Construct the state evaluation index of each key node；Corresponding evaluation weight coefficient is established to each key node evaluation index；Based on relay protection, interchanger and the self-test of secondary device state and on-line monitoring, the on-line condition monitoring of digitlization secondary circuit state evaluation index is realized；The status assessment model and algorithm for establishing each item digitlization secondary circuit are realized to every digitlization secondary circuit presence assessment of intelligent substation.This method can be monitored and be assessed to each node state on intelligent substation digitlization secondary circuit online, and the weak link on intelligent substation every digitlization secondary circuit of discovery is facilitated, and carry out overall merit to the health status of entire digitlization secondary circuit.

Description

A kind of method of intelligent substation digitlization secondary circuit presence assessment
Technical field
The present invention relates to a kind of state evaluating methods, and in particular to a kind of intelligent substation digitlization secondary circuit is in threadiness The method of state assessment.
Background technique
With further speeding up for China's intelligent substation pace of construction, intelligent substation secondary device scale also will be fast Speed increases, and for intelligent substation using digitlization secondary circuit instead of traditional cable circuit, digital secondary circuit is to constitute intelligence The important component of transforming plant protecting control system, the state for how effectively carrying out intelligent substation digitlization secondary circuit are commented Estimate, is basis and the key for realizing intelligent substation relay protection repair based on condition of component.
Intelligent substation is digitized secondary circuit and is transmitted using GOOSE and SV network signal instead of conventional substation device Between hard cable connection, digitize secondary circuit and traditional cable circuit and all cut in physical structure, transmission characteristic and working mechanism It is so different, the complete elaboration to intelligent substation digitlization secondary circuit state evaluating method is also lacked in currently associated research, It is unable to satisfy the needs of intelligent substation relay protection system repair based on condition of component application.In addition, secondary equipment of intelligent converting station and number The strengthened research of word secondary circuit state on_line monitoring also changes traditional mode by artificially making an inspection tour, to realize secondary device The realization of presence assessment provides the foundation, and therefore, there is an urgent need for carry out intelligent substation to digitize secondary circuit presence The research of appraisal procedure.
Summary of the invention
In order to overcome the above-mentioned deficiencies of the prior art, the present invention is the presence that intelligent substation digitizes secondary circuit Assessment provides a kind of method of complete presence assessment, and this method building digitlization secondary circuit object model is established Secondary circuit presence assessment indicator system is digitized, it can be online to each node on intelligent substation digitlization secondary circuit State is monitored and is assessed, and facilitates the weak link on intelligent substation every digitlization secondary circuit of discovery, to entire number The health status of word secondary circuit carries out overall merit, be intelligent substation relay protection system integrality evaluation and after Electric protection system repair based on condition of component lays the foundation.
This method adopts the following technical scheme that:
The present invention provides a kind of method of intelligent substation digitlization secondary circuit presence assessment, the status assessment Method specifically includes the following steps:
Step 1: towards intelligent substation digitlization secondary circuit physical object building digitlization secondary circuit object model；
Step 2: determining the key node of intelligent substation digitlization secondary circuit status assessment；
Step 3: the state evaluation index of each key node on building digitlization secondary circuit；
Step 4: corresponding evaluation weight system is established to each key node evaluation index on digitlization secondary circuit Number；
Step 5: being based on relay protection, interchanger and the self-test of secondary device state and on-line monitoring, realize that digitlization is secondary The on-line condition monitoring of loop state evaluation index；
Step 6: based on digitlization secondary circuit object model, establishing the status assessment model of each item digitlization secondary circuit And algorithm, it realizes to every digitlization secondary circuit presence assessment of intelligent substation.
In the step 1, it is based on IEC 61970CIM Object -Oriented Model method, expanded definition intelligent substation number Change physical object model involved in secondary circuit, building digitlization secondary circuit link model, and indicates two by digraph The digitlization secondary circuit physical object class of minor loop link model, above-mentioned extension has:
1) fiber optic communication port class (Optical fiber Port)
2) optical module class (OpticalModule)
3) light terminal (OpticalTerminal)
4) optical cable class (OpticalCable) between screen cabinet
5) optical cable fibre core class (FibreCore) between screen cabinet
6) shield tail optical fiber class (PigtailCable) in cabinet
7) GOOSE link class (GOOSELink)
8) SV link class (SVLink)
The connection relationship that digitlization secondary circuit link model can be expressed as:
GOOSE link/SV link -> device fiber optic communication port (transmitting terminal) -> optical module -> tail optical fiber -> light terminal -> light Cable fibre core -> light terminal -> tail optical fiber -> optical module -> device fiber optic communication port (receiving end) -> GOOSE link/SV link, Middle exchange apparatus samples MESSAGE EXCHANGE, and realizes that the information between each port of interchanger is transmitted by multicast mode, therefore right In exchange apparatus there is also in a multicast group range from exchange apparatus communication port to another or it is several The relationship of GOOSE link or SV link switching transmission and link connection between a exchange apparatus communication port, such as GOOSE chain Road/SV link -> exchange communication port 1- > exchange communication port 2- > GOOSE link/SV link.Above-mentioned entire secondary returning Road connection relationship can be indicated by digraph, and can determine that the number of links that each port is flowed through.
In the step 2, secondary circuit structure and working characteristics are digitized according to intelligent substation, selection digitlization is secondary The key node of circuit presence assessment mainly includes the 1. devices fiber optic communication such as protection, observing and controlling, combining unit, intelligent terminal Port；2. optical module；3. interchanger fiber optic communication port.
In the step 3, the presence evaluation index of each key node on building digitlization secondary circuit is main To include following types of evaluation index:
1) class state evaluation index in device fiber optic communication port specifically includes that 1. device communication port link state；2. filling Set communication port flow；3. device communication link frame losing state；
2) optical module class state evaluation index specifically includes that
1. port SFP optical mode deblocking temperature；2. port SFP optical module voltage；3. port SFP optical mode light intensity；
3) class state evaluation index in interchanger fiber optic communication port specifically includes that
1. exchange communication port link state；2. exchange communication port flow；3. exchange communication port frame loss rate；
By described above, intelligent substation digitlization secondary circuit presence evaluation index is divided into four layers, and first layer is Destination layer, building digitlization secondary circuit presence evaluation index system, the second layer is according to digitlization secondary circuit physics knot Structure is divided into device fiber optic communication port class state evaluation index, the state evaluation index of optical module class, interchanger fiber optic communication end The three classes critical evaluation indexs such as the state evaluation index of mouth class, and every digitlization each key node of secondary circuit is indicated with x Evaluation index value, wherein xaIndicate the state evaluation index of device fiber optic communication port class, xbIndicate the state evaluation of optical module class Index, xcIndicate that the state evaluation index of interchanger fiber optic communication port class, third layer digitize secondary according to intelligent substation The communication service mapping realization mechanism of circuit GOOSE, SV, will digitize each link of secondary circuit by physical layer and link layer into Row divides, and the 4th layer of further division goes out specific presence evaluation index.
In the step 4, nine grades of scales are based on to digitlization secondary circuit evaluation criterion weight coefficient, using step analysis Method establishes evaluation criterion weight coefficient, WjIndicate j-th of index weights coefficient, wherein
∑wj=1
In the step 5, it is based on relay protection, interchanger and the self-test of secondary device state and on-line monitoring, realizes number The Condition Monitoring Data source for changing secondary circuit presence evaluation index, mainly from 1. intelligent substation relay protection etc. two Secondary device is monitored on-line about equipment itself and the on-line monitoring information of device communication port；2. switch device itself is online On-line monitoring, network message monitoring and the self-checking alarming information of monitoring and device communication port；3. Network Analyzer equipment pair Device communication port network message monitoring and statistical analysis information.Based on the on-line monitoring to above- mentioned information, digitlization two is realized The on-line monitoring of minor loop key node state evaluation index.
In the step 6, based on digitlization secondary circuit object model and presence evaluation index, each item number is established Change the status assessment model and algorithm of secondary circuit, realizes to every digitlization secondary circuit status assessment of intelligent substation.Institute State the presence assessment algorithm model of digitlization secondary circuit are as follows:
M is the number of evaluation index, wjFor j-th of index weights coefficient, xjFor the evaluation of estimate (hundred-mark system) of j-th of index.
The Comment gathers L=[normal, it is noted that abnormal, severely subnormal] of digitlization secondary circuit presence assessment is established, Middle L1 (normal)=80~100 points, L2 (attentions)=71~85 points, L2 (exceptions)=61~70 points, L2 is (tightWeight is abnormal)=60 points or less.
Each evaluation index x of above-mentioned digitlization secondary circuit presence assessmentjEvaluation model it is as described below:
1) device (protection equipment) temperature evaluation model, y are on-line monitoring state evaluation index score value；
2) device (protection equipment) communication port link state evaluation model, y are on-line monitoring state evaluation index score value；
3) device (protection equipment) communication link frame losing state evaluation model, y are on-line monitoring state evaluation index score value；
4) device (protection equipment) communication port port flow evaluation model, y are on-line monitoring state evaluation index score value；
5) port optical module temperature evaluation model, y are on-line monitoring state evaluation index score value；
6) port optical module voltage evaluation model, y are on-line monitoring state evaluation index score value；
7) port optical module light intensity evaluation model；
8) exchange communication port link state evaluation model；
9) switch communication link frame loss rate/bit error rate evaluation model；
10) exchange communication port port flow evaluation model, y are on-line monitoring state evaluation index score value；
11) switch communication module temperature evaluation model, y are on-line monitoring state evaluation index score value.
Compared with prior art, the beneficial effects of the present invention are:
The present invention passes through the decomposition to intelligent substation digitlization secondary circuit physical structure, working mechanism, transmission characteristic And analysis, the digitlization secondary circuit presence assessment indicator system of stratification is proposed, is become to implement the intelligence of lean Digitlization secondary circuit presence assessment in power station is laid a good foundation.
The present invention is based on intelligent substation relay protection secondary equipment and network message to monitor on-line, is intelligent substation number Word secondary circuit provides a kind of method of complete presence assessment, can digitize online to intelligent substation secondary Each node state is monitored and is assessed on circuit, the weak ring on intelligent substation every digitlization secondary circuit of discovery in time Section carries out overall merit to the health status of entire digitlization secondary circuit, effectively reduces intelligent substation operation risk, mention High intelligent substation secondary O&M overhaul efficiency, is that the integrality evaluation of intelligent substation relay protection system and relay are protected Protecting system repair based on condition of component lays the foundation.
Detailed description of the invention
Fig. 1 is the intelligent substation number based on intelligent substation digitlization secondary circuit STRUCTURE DECOMPOSITION in the embodiment of the present invention Word secondary circuit object model class figure.
Fig. 2 is that the intelligent substation digitlization secondary circuit presence assessment stratification constructed in the embodiment of the present invention refers to Mark system schematic diagram.
Fig. 3 a is the typical spacing GOOSE link communication schematic network structure of intelligent substation.
Fig. 3 b is the digraph of intelligent substation digitlization secondary circuit characterization port connection.
Fig. 4 a- Fig. 4 k is on-line monitoring state evaluation index value evaluation model figure.
Specific embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings
The present invention provides a kind of method of intelligent substation digitlization secondary circuit presence assessment, the status assessment Method specifically includes the following steps:
Step 1: towards intelligent substation digitlization secondary circuit physical object building digitlization secondary circuit object model；
Step 2: determining the key node of intelligent substation digitlization secondary circuit status assessment；
Step 3: the state evaluation index of each key node on building digitlization secondary circuit；
Step 4: corresponding evaluation weight system is established to each key node evaluation index on digitlization secondary circuit Number；
Step 5: being based on relay protection, interchanger and the self-test of secondary device state and on-line monitoring, realize that digitlization is secondary The on-line condition monitoring of loop state evaluation index；
Step 6: based on digitlization secondary circuit object model, establishing the status assessment model of each item digitlization secondary circuit And algorithm, it realizes to every digitlization secondary circuit presence assessment of intelligent substation.
In the step 1, it is based on IEC 61970CIM Object -Oriented Model method, expanded definition intelligent substation number Change physical object model involved in secondary circuit, building digitlization secondary circuit link model, and indicates two by digraph The digitlization secondary circuit physical object class of minor loop link model, above-mentioned extension has:
1) fiber optic communication port class (Optical fiber Port)；
2) optical module class (OpticalModule)；
3) light terminal (OpticalTerminal)；
4) optical cable class (OpticalCable) between screen cabinet；
5) optical cable fibre core class (FibreCore) between screen cabinet；
6) shield tail optical fiber class (PigtailCable) in cabinet；
7) GOOSE link class (GOOSELink)；
8) SV link class (SVLink).
The connection relationship that digitlization secondary circuit link model can be expressed as:
GOOSE link/SV link -> device fiber optic communication port (transmitting terminal) -> optical module -> tail optical fiber -> light terminal -> light Cable fibre core -> light terminal -> tail optical fiber -> optical module -> device fiber optic communication port (receiving end) -> GOOSE link/SV link, Middle exchange apparatus samples MESSAGE EXCHANGE, and realizes that the information between each port of interchanger is transmitted by multicast mode, therefore right In exchange apparatus there is also in a multicast group range from exchange apparatus communication port to another or it is several The relationship of GOOSE link or SV link switching transmission and link connection between a exchange apparatus communication port, such as GOOSE chain Road/SV link -> exchange communication port 1- > exchange communication port 2- > GOOSE link/SV link.Above-mentioned entire secondary returning Road connection relationship can be indicated by digraph, and can determine that the number of links that each port is flowed through.
Fig. 3 a is the typical spacing GOOSE link communication schematic network structure of intelligent substation.Shown in Fig. 3 b, use is oriented Figure indicates the connection relationship and data flow between intelligent substation digitlization each key node of secondary circuit.It can by digraph Easily to find node crucial on every secondary circuit.Start failure protection signal as route protection issues bus protection passes through GOSSE link issues bus protection along 3. -> 7. -> 10. -> node 6. and direction.
In the step 2, the digitlization secondary circuit structure of intelligent substation shown in 1 and working characteristics, are selected with reference to the accompanying drawings The key node for selecting digitlization secondary circuit presence assessment mainly includes 1. protection, observing and controlling, combining unit, intelligent terminal etc. Device fiber optic communication port；2. optical module；3. interchanger fiber optic communication port.
Due to intelligent substation using GOOSE and SV network signal instead of between conventional substation device hardwire it is logical Letter mode samples value signal using GOOSE and SV transmission protection, measure and control device breaker tripping and closing order, and different protective device it Between locking and the signals such as start failure protection.Due to using the important real-time message of GOOSE transmission trip protection etc., should meet after The requirement of electric protection " reliability, quick-action ", therefore GOOSE belongs to rapid message transmission service in IEC 61850.IEC The delay of 61850 regulation GOOSE message transmission should be within 4ms.In order to reduce the delay of Message processing process, guarantee that data pass Defeated real-time, IEC 61850 cut original ICP/IP protocol, are gone when defining GOOSE service realization mechanism Network layer and transport layer are fallen.Therefore intelligent substation digitlization secondary circuit network information transmission, other than application layer, only There are physical layer and link layer, physical layer is data delivery service, provides reliable and stable physical channel, and data link can manage Solution is data channel, and data communication of the physical layer between each terminal device provides transmission medium and its connection, and link layer is for net Network layers provide data delivery service.
The digitlization secondary circuit of selection is analyzed in threadiness based on digitlization secondary circuit physical structural characteristic based on above-mentioned The key node of state assessment, and characteristic and networking by digitizing secondary circuit network mapping service to intelligent substation The working mechanism of data transmission and the working mechanism of exchange data exchange etc. analyze, and form described in step 3, construct number The presence assessment indicator system of each key node on word secondary circuit, digitizes secondary returning for intelligent substation Road presence evaluation index is divided into four floor, and first layer is destination layer, building digitlization secondary circuit presence evaluation index System, the second layer are divided into device fiber optic communication port class state evaluation index, optical mode according to digitlization secondary circuit physical structure The three classes critical evaluation indexs such as the state evaluation index of block class, the state evaluation index of interchanger fiber optic communication port class, and use x Indicate the evaluation index value of every digitlization each key node of secondary circuit, wherein xaIndicate the shape of device fiber optic communication port class State evaluation index, xbIndicate the state evaluation index of optical module class, xcIndicate that the state evaluation of interchanger fiber optic communication port class refers to Mark, third layer will be digitized according to the communication service mapping realization mechanism of intelligent substation digitlization secondary circuit GOOSE, SV Each link of secondary circuit is divided by physical layer and link layer, and the 4th layer of further division goes out specific presence evaluation and refer to Mark mainly includes following types of evaluation index:
1) class state evaluation index in device fiber optic communication port specifically includes that 1. device communication port link state；2. filling Set communication port flow；3. device communication link frame losing state；
2) optical module class state evaluation index specifically includes that
1. port SFP optical mode deblocking temperature；2. port SFP optical module voltage；3. port SFP optical mode light intensity；
3) class state evaluation index in interchanger fiber optic communication port specifically includes that
1. exchange communication port link state；2. exchange communication port flow；3. exchange communication port frame loss rate；
As described above, the intelligent substation digitlization secondary circuit presence assessment stratification index system of building is as schemed Shown in 2.
In the step 4, nine grades of scales are based on to digitlization secondary circuit evaluation criterion weight coefficient, using step analysis Method establishes evaluation criterion weight coefficient, WjIndicate j-th of index weights coefficient, wherein
∑wj=1
The value of j, depending on choosing the total number of evaluation index, in the present embodiment, the selection according to the present invention is commented Valence index, j value range are 1-11.
In the step 5, it is based on relay protection, interchanger and the self-test of secondary device state and on-line monitoring, realizes number The Condition Monitoring Data source for changing secondary circuit presence evaluation index, mainly from 1. intelligent substation relay protection etc. two Secondary device is monitored on-line about equipment itself and the on-line monitoring information of device communication port link state；2. switch device On-line monitoring, network message monitoring and the self-checking alarming information of on-line monitoring itself and device communication port；3. network analysis Instrument equipment is to device communication port network message monitoring and statistical analysis information.Based on the on-line monitoring to above- mentioned information, realize Digitize the on-line monitoring of secondary circuit key node state evaluation index.
Wherein the equipment such as intelligent substation relay protection, measure and control device, combining unit, intelligent terminal mainly include a) filling Set temperature, b) communication link state, c) device port optical mode deblocking temperature, d) device port optical module voltage, e) device port light The acquisition of the on-line condition monitorings information such as module light intensity；
Switch device mainly includes a) switch device communication module temperature, b) switch port state, c) interchanger Port optical module temperature, d) switch port optical module voltage, e) switch port input and output byte number, f) switch port The acquisition of input and output frame number, g) the on-line condition monitorings information such as switch port rate；
Network Analyzer mainly include each communication link state a) parsed, each communication link flow b) parsed, C) the serious frame losing state of each communication link parsed；
Based on the on-line monitoring to above- mentioned information, the online of digitlization secondary circuit key node state evaluation index is realized Monitoring.
In the step 6, based on digitlization secondary circuit object model and presence evaluation index, each item number is established Change the status assessment model and algorithm of secondary circuit, realizes to every digitlization secondary circuit status assessment of intelligent substation.Institute State the presence assessment algorithm model of digitlization secondary circuit are as follows:
M is the number of evaluation index, wjFor j-th of index weights coefficient, xjFor the evaluation of estimate (hundred-mark system) of j-th of index. In the present embodiment, m takes 11.
The Comment gathers L=[normal, it is noted that abnormal, severely subnormal] of digitlization secondary circuit presence assessment is established, Middle L1 (normal)=80~100 points, L2 (attentions)=71~85 points, L2 (exceptions)=61~70 points, L2 (severely subnormals)=60 points or less.
Each evaluation index x of above-mentioned digitlization secondary circuit presence assessmentjEvaluation model it is as described below:
1) device (protection equipment) temperature evaluation model, y is on-line monitoring state evaluation index score value, is such as schemed
Shown in 4a；
2) device (protection equipment) communication port link state evaluation model, y are on-line monitoring state evaluation index score value, As shown in Figure 4 b；
3) device (protection equipment) communication link frame losing state evaluation model, y are on-line monitoring state evaluation index score value, As illustrated in fig. 4 c；
4) device (protection equipment) communication port port flow evaluation model, y are on-line monitoring state evaluation index score value, As shown in figure 4d；
5) port optical module temperature evaluation model, y are on-line monitoring state evaluation index score value, as shown in fig 4e；
6) port optical module voltage evaluation model, y are on-line monitoring state evaluation index score value, as shown in fig. 4f；
7) port optical module light intensity evaluation model, as shown in figure 4g；
8) exchange communication port link state evaluation model, as shown in figure 4h；
9) switch communication link frame loss rate/bit error rate evaluation model, as shown in figure 4i；
10) exchange communication port port flow evaluation model, y is on-line monitoring state evaluation index score value, such as Fig. 4 j It is shown；
11) switch communication module temperature evaluation model, y is on-line monitoring state evaluation index score value, such as Fig. 4 k institute Show.
The present invention passes through the decomposition to intelligent substation digitlization secondary circuit physical structure, working mechanism, transmission characteristic And analysis, the digitlization secondary circuit presence assessment indicator system of stratification is proposed, is become to implement the intelligence of lean Digitlization secondary circuit presence assessment in power station is laid a good foundation.The present invention is based on intelligent substation relay protection secondary equipment It is monitored on-line with network message, digitizes secondary circuit for intelligent substation and provide a kind of side of complete presence assessment Method can be monitored and be assessed to each node state on intelligent substation digitlization secondary circuit online, in time discovery intelligence Weak link on every digitlization secondary circuit of substation, carries out synthesis to the health status of entire digitlization secondary circuit and comments Valence effectively reduces intelligent substation operation risk, improves intelligent substation secondary O&M overhaul efficiency, is intelligent substation The integrality evaluation of relay protection system and relay protection system repair based on condition of component lay the foundation.
Finally it should be noted that: the above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof, institute The those of ordinary skill in category field can still modify to specific implementation method of the invention referring to above-described embodiment or Equivalent replacement, these are applying for this pending hair without departing from any modification of spirit and scope of the invention or equivalent replacement Within bright claims.

Claims (7)

1. a kind of method of intelligent substation digitlization secondary circuit presence assessment, it is characterised in that: the following steps are included:
Step 1: towards intelligent substation digitlization secondary circuit physical object building digitlization secondary circuit object model；
Step 2: determining the key node of intelligent substation digitlization secondary circuit status assessment；
Step 3: the presence evaluation index of each key node on building digitlization secondary circuit；
Step 4: corresponding evaluation weight coefficient is established to each key node evaluation index on digitlization secondary circuit；
Step 5: being based on relay protection, interchanger and the self-test of secondary device state and on-line monitoring, realize digitlization secondary circuit The on-line condition monitoring of state evaluation index；
Step 6: based on digitlization secondary circuit object model, establishing the presence assessment mould of each item digitlization secondary circuit Type is realized to every digitlization secondary circuit presence assessment of intelligent substation；
In the step 1, it is based on 61970 CIM Object -Oriented Model method of IEC, the digitlization of expanded definition intelligent substation Physical object model involved in secondary circuit, building digitlization secondary circuit link model, and indicate secondary by digraph The digitlization secondary circuit physical object class of circuit link model, above-mentioned extension has:
1) fiber optic communication port class；
2) optical module class；
3) light terminal；
4) optical cable class between screen cabinet；
5) optical cable fibre core class between screen cabinet；
6) shield tail optical fiber class in cabinet；
7) GOOSE link class；
8) SV link class；
The connection relationship that digitlization secondary circuit link model is expressed as:
GOOSE link/SV link, device fiber optic communication port transmitting terminal, optical module, tail optical fiber, light terminal, optical cable fibre core, light end Son, tail optical fiber, optical module, device fiber optic communication port receiving end, GOOSE link/SV link are sequentially connected, wherein exchange apparatus MESSAGE EXCHANGE is sampled, and realizes that the information between each port of interchanger is transmitted by multicast mode；By above-mentioned entire secondary circuit Connection relationship is indicated by digraph, and determines the number of links that each port is flowed through.
2. the method for intelligent substation digitlization secondary circuit presence assessment according to claim 1, feature exist In: in the step 2, secondary circuit structure and working characteristics, selection digitlization secondary circuit are digitized according to intelligent substation The key node of presence assessment, it is main including 1. device fiber optic communication port；2. optical module；3. interchanger fiber optic communication end Mouthful.
3. the method for intelligent substation digitlization secondary circuit presence assessment according to claim 1, feature exist In: in the step 3, the presence evaluation index of each key node on building digitlization secondary circuit is main to wrap Include following types of evaluation index:
1) device fiber optic communication port class state evaluation index specifically includes that 1. device communication port link state；2. device is logical Believe port flow；3. device communication link frame losing state；
2) optical module class state evaluation index specifically includes that 1. port SFP optical mode deblocking temperature；2. port SFP optical module voltage； 3. port SFP optical mode light intensity；
3) interchanger fiber optic communication port class state evaluation index, specifically includes that 1. exchange communication port link state；2. handing over Communication port of changing planes flow；3. exchange communication port frame loss rate.
4. the method for intelligent substation digitlization secondary circuit presence assessment according to claim 1 or 3, feature Be: intelligent substation digitlization secondary circuit presence evaluation index is divided into four layers, and first layer is destination layer, building number Change secondary circuit presence evaluation index system；The second layer is divided into device optical fiber according to digitlization secondary circuit physical structure and leads to Letter port class state evaluation index, the state evaluation index of optical module class, interchanger fiber optic communication port class state evaluation refer to Three classes critical evaluation index is marked, and indicates the evaluation index value of every digitlization each key node of secondary circuit with x, wherein xaTable The state evaluation index of showing device fiber optic communication port class, xbIndicate the state evaluation index of optical module class, xcIndicate interchanger light The state evaluation index of fiber communication port class；Third layer takes according to the communication of intelligent substation digitlization secondary circuit GOOSE, SV Business Mapping implementation mechanism, will digitize each link of secondary circuit and divides by physical layer and link layer；4th layer is further drawn Separate specific presence evaluation index.
5. the method for intelligent substation digitlization secondary circuit presence assessment according to claim 1, feature exist In: in the step 4, nine grades of scales are based on to digitlization secondary circuit evaluation criterion weight coefficient, are built using analytic hierarchy process (AHP) Vertical evaluation criterion weight coefficient, WjIndicate j-th of index weights coefficient, wherein
∑wj=1.
6. the method for intelligent substation digitlization secondary circuit presence assessment according to claim 1, feature exist In: in the step 5, on-line condition monitoring data source mainly from: 1. intelligent substation relay protection secondary equipment about The on-line monitoring information of equipment on-line monitoring itself and device communication port；2. switch device on-line monitoring itself and dress Set the on-line monitoring, network message monitoring and self-checking alarming information of communication port；3. Network Analyzer equipment is to device communication ends Mouth network message monitoring and statistical analysis information.
7. the method for intelligent substation digitlization secondary circuit presence assessment according to claim 1, feature exist In: in the step 6, digitize the presence assessment models of secondary circuit are as follows:
M is the number of evaluation index, wjFor j-th of index weights coefficient, xjFor the evaluation of estimate of j-th of index.
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