CN109767108A - A kind of accurate analysis method of electric power dispatching system line status - Google Patents
A kind of accurate analysis method of electric power dispatching system line status Download PDFInfo
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- Y—GENERAL 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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- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
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- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
Abstract
A kind of accurate analysis method of electric power dispatching system line status proposed by the present invention, comprising: extract the number of each route；Power grid same day event statistics information is obtained, and obtains accident abnormality information and operation modification information from same day event statistics information；The accident abnormality information and operation modification information that acquisition includes circuit number are as event analysis object；It retrieves the keyword in each event analysis object, and the corresponding line events of event analysis object is judged according to keyword to have a power failure or power transmission rower of going forward side by side shows；For the event analysis object for being denoted as having a power failure with power transmission, same day route head end and the electric current of end, the active and idle power failure of substitution respectively check and correction model and power transmission check and correction model are proofreaded.In the present invention, the verification for line events in power grid same day event statistics information is realized, line status analysis is carried out based on the line events filtered out and improves to the accurate of power network line state analysis, and improve analysis efficiency.
Description
Technical field
The present invention relates to the accurate sides of analysis of dispatching of power netwoks technical field more particularly to a kind of electric power dispatching system line status
Method.
Background technique
The state of scheduling system line is divided into power-off and operation, and the transformation of two states is known as state switching, is divided into power failure
Or power transmission.
Scheduling creation data is the pith of grid power quality system monitoring, and the system is from supporting system technology
In integrate electric power data mainly include mains frequency, network voltage, grid equipment account and power transmission and transforming equipment switching etc. correlations
Information.Accurate judgement dispatches the time and equipment that power grid power transmission and transformation equipment state handover event occurs, and can reflect a certain region
Operation of power networks state provides sufficient support to search failure, analysis failure and Fault Isolation, can be further improved power grid number
According to quality.
The reason of event for causing line status to switch has: 1. occur accident or exception, and equipment damage is caused not to be available,
Feature is line outage, but two sides breaker remote signalling value is still high level.2. operation maintenance personnel is overhauled according to plan target,
Feature is that route two sides breaker remote signalling value switchs to low level by high level simultaneously, and grounding switch remote signalling value is switched to by low level
High level.3. provisional operation, deliberately change route two sides circuit-breaker status, feature be route two sides breaker side or
Two sides switch to low level, but grounding switch remote signalling value is still low level.
Existing scheduling system line state switch reasons study and judge mode be using manually by telephone questionnaire scene and
The problem of mode of query scheduling log carries out, and this more original mode causes has: being unable to learn in time state on route
The reason of handover event occurs；It needs to expend great effort and relies on experience and studied and judged.
Summary of the invention
Technical problems based on background technology, the invention proposes a kind of electric power dispatching system line status precisely to divide
Analysis method.
A kind of accurate analysis method of electric power dispatching system line status proposed by the present invention, comprising the following steps:
S1, the information for obtaining all routes in power grid extract the number of each route, and circuit number are stored to preset
In database；
S2, obtain power grid same day event statistics information, and from same day event statistics information obtain accident abnormality information and
Operate modification information；Accident abnormality information aggregate=A-B, A are the event comprising tripping in same day event statistics information, and B is to work as
It include the event of successful reclosing in day event statistics information；Modification information set=C-D is operated, C is same day event statistics information
In perhaps turn maintenance comprising transhipment row event D be in same day event statistics information include factory, stand or the event of field；
The accident abnormality information and operation modification information that S3, acquisition include circuit number are as event analysis object；
S4, by event category be have a power failure and power transmission, and in the text of predeterminable event information keyword it is corresponding with event pass
System；
Keyword in S5, each event analysis object of retrieval, and the corresponding line of event analysis object is judged according to keyword
Road event is to have a power failure or power transmission rower of going forward side by side shows；
S6, setting, which have a power failure, proofreads model:
{(Iimax-Iimin)/Iimax>k1&(Ijmax-Ijmin)/Ijmax>k1}U{(Pimax-Pimin)/Pimax>
k2&(Pjmax-Pjmin)/Pjmax>k2}；
Power transmission is set and proofreads model:
{ 1 > (Iimax-Iimin)/Iimax >=k3&1 > (Ijmax-Ijmin)/Ijmax >=k3 } U { 1 > (Pimax-
Pimin)/Pimax >=k3&1 > (Pjmax-Pjmin)/Pjmax >=k3 }；K1 ﹤ k3, k2 ﹤ k3；
Wherein, Iimax, Pimax and Qimax be the current maxima of same day route head end, active maximum value and it is idle most
Big value, Iimin, Pimin and Qimin are current minimum, active minimum value and the idle minimum value of same day route head end；
Ijmax, Pjmax and Qjmax be same day line end current maxima, active maximum value and idle maximum value, Ijmin,
Pjmin and Qjmin is current minimum, active minimum value and the idle minimum value of same day line end；
S7, the event analysis object for being denoted as having a power failure, by same day route head end and the electric current of end, active and idle
It substitutes into the check and correction model that has a power failure to be proofreaded, after proofreading successfully, obtains time of origin in Iimax, Ijmax, Pimax, Pjmax
Earliest one is used as power off time；Check and correction failure, then abandon this event information；
S8, the event analysis object for being denoted as power transmission, by same day route head end and the electric current of end, active and idle
It substitutes into power transmission check and correction model to be proofreaded, after proofreading successfully, obtains time of origin in Iimax, Ijmax, Pimax, Pjmax
Earliest one is used as electric power feeding time.
Preferably, in step S1, line information is read from saving to adjust in D5000 system.
Preferably, in step S2, power grid same day event statistics information is read in OMS system from saving to adjust.
Preferably, in step S4, the corresponding keyword having a power failure includes: to pull open, deactivate and trip；The keyword of corresponding power transmission
It include: to close.
Preferably, k2 ﹤ k1 ﹤ k3.
Preferably, k1=0.3, k2=0.1, k3=0.9.
Preferably, further include step S9: judging line status handover event reason, judgment method the following steps are included:
Maintenance plan information in S91, the dispatching log on the acquisition power grid same day, and standardize to maintenance plan information
Processing；Obtain the circuit number for including in maintenance plan, and event analysis object corresponding with circuit number；
S91A, for the event analysis object for being denoted as power transmission, judge in corresponding maintenance plan information with the presence or absence of sending
Electric plan condition is, then by line status handover event reason labeled as plan；It is no, then abandon this line events information；
Power transmission plan condition are as follows: route head end breaker remote signalling value switchs to high level, line end breaker by low level
Remote signalling value low level switchs to low level, and line end by high level by switching to high level, route head end grounding switch remote signalling value
Breaker remote signalling value switchs to low level by high level；
S91B, for the event analysis object for being denoted as having a power failure, judge in corresponding maintenance plan information with the presence or absence of stopping
Electric plan condition is, then by line status handover event reason labeled as plan；It is no, then abandon this line events information；
Power failure plan condition are as follows: route head end breaker remote signalling value switchs to low level, line end breaker by high level
Remote signalling value switchs to low level by high level, and route head end grounding switch remote signalling value switchs to high level, and line end by low level
Breaker remote signalling value switchs to high level by low level；
S92, acquisition are present in the exception handling information on the dispatching log same day and are not present in maintenance plan information
Circuit number, and event analysis object corresponding with circuit number；
S92A, for the event analysis object for being denoted as power transmission, if route head end breaker and line end breaker
Remote signalling value is low level, and route head end grounding switch and line end grounding switch remote signalling value are high level, then by line
Line state handover event reason is labeled as accident；Conversely, then abandoning this line events information；
S92B, for be denoted as have a power failure event analysis object, if route head end breaker and line end breaker
Remote signalling value is high level, and route head end grounding switch and line end grounding switch remote signalling value are low level, then by line
Line state handover event reason is labeled as accident；Conversely, then abandoning this line events information；
The circuit number that S93, acquisition are not present in exception handling information and are not present in maintenance plan information, and
Event analysis object corresponding with circuit number；
S93A, for the event analysis object for being denoted as power transmission, if route head end breaker switchs to high electricity by low level
Flat or end breaker switchs to high level by low level, then line status handover event reason is labeled as scheduling；Conversely, then abandoning
This line events information；
S93B, for be denoted as have a power failure event analysis object, if route head end breaker switchs to low electricity by high level
Flat or end breaker switchs to low level by high level, then line status handover event reason is labeled as scheduling；Conversely, then abandoning
This line events information.
Preferably, in step S91, maintenance plan information carries out standardization processing method particularly includes: believes maintenance plan
Circuit number in breath in route number information and event analysis object is unified.
Preferably, dispatching log is transferred from PMS system.
A kind of accurate analysis method of electric power dispatching system line status proposed by the present invention passes through route head end and end
Line outage time and route electric power feeding time are checked in electric current, active and idle calculating, realize for power grid same day thing
The verification of line events in part statistical information excludes invalid event, in this way, ensure that the power-off event filtered out and power transmission thing
Part it is effective and accurate, carry out line status analysis based on the line events that filter out and also improve to power network line state analysis
It is accurate, and improve analysis efficiency.
In the present invention, line events verification after, according to Iimax, Ijmax, Pimax, Pjmax obtain power off time or
Electric power feeding time, further perfect temporal information enrich the reference data of line status analysis.
In the present invention, the accident abnormality data and operation change data and scheduling system equipment in main website OMS system are used
Account data, which combine, studies and judges line status switching time, improves time precision and judges speed；Using in main website OMS system
Operation ticket data combines scheduling system equipment historical data to combine and studies and judges line status handover event, and it is accurate to improve.
Detailed description of the invention
Fig. 1 is that the invention proposes a kind of accurate analysis method flow charts of electric power dispatching system line status；
Fig. 2 is to judge line status handover event reason flow chart.
Specific embodiment
Referring to Fig.1, a kind of accurate analysis method of electric power dispatching system line status proposed by the present invention, including following step
It is rapid:
S1, the information for obtaining all routes in power grid extract the number of each route, and circuit number are stored to preset
In database.Specifically, the information of all routes is directly read from from province's tune D5000 system in power grid in this step.
S2, obtain power grid same day event statistics information, and from same day event statistics information obtain accident abnormality information and
Operate modification information.Accident abnormality information aggregate=A-B, A are the event comprising tripping in same day event statistics information, and B is to work as
It include the event of successful reclosing in day event statistics information.That is, accident abnormality information is same day event statistics in present embodiment
Comprising tripping and not comprising the line events of successful reclosing in information.
Modification information set=C-D is operated, C is the thing for going or turning maintenance in same day event statistics information comprising transhipment
Part, D be in same day event statistics information comprising factory, stand or the event of field.That is, operation modification information is same day event statistics letter
Comprising transhipment row or turn maintenance in breath and do not include factory, stand or the line events of field.
Specifically, reading power grid same day event statistics information in OMS system from saving to adjust in this step.S3, acquisition include
The accident abnormality information and operation modification information of circuit number are as event analysis object.That is, believing in this step from accident abnormality
Breath set and operation modification information set in select include circuit number line events as event analysis object.
In this way, directly obtaining accident abnormality information and operation change letter by set operation in conjunction with step S2 and step S3
Breath is conducive to improve Information Statistics efficiency, and event is avoided to omit, to guarantee that the data of power network line state analysis are comprehensive
Property.
S4, by event category be have a power failure and power transmission, and in the text of predeterminable event information keyword it is corresponding with event pass
System.Specifically, the corresponding keyword having a power failure includes: to pull open, deactivate and trip in this step；The keyword of corresponding power transmission includes:
It closes.
Keyword in S5, each event analysis object of retrieval, and the corresponding line of event analysis object is judged according to keyword
Road event is to have a power failure or power transmission rower of going forward side by side shows.
S6, setting, which have a power failure, proofreads model:
{(Iimax-Iimin)/Iimax>k1&(Ijmax-Ijmin)/Ijmax>k1}U{(Pimax-Pimin)/P imax
>k2&(Pjmax-Pjmin)/Pjmax>k2}。
Power transmission is set and proofreads model:
{ 1 > (Iimax-Iimin)/Iimax >=k3&1 > (Ijmax-Ijmin)/Ijmax >=k3 } U { 1 > (Pimax-
Pimin)/Pimax >=k3&1 > (Pjmax-Pjmin)/Pjmax >=k3 }.K1 ﹤ k3, k2 ﹤ k3.
Wherein, Iimax, Pimax and Qimax be the current maxima of same day route head end, active maximum value and it is idle most
Big value, Iimin, Pimin and Qimin are current minimum, active minimum value and the idle minimum value of same day route head end.
Ijmax, Pjmax and Qjmax be same day line end current maxima, active maximum value and idle maximum value, Ijmin,
Pjmin and Qjmin is current minimum, active minimum value and the idle minimum value of same day line end.
In present embodiment, k2 ﹤ k1 ﹤ k3, specifically, k1=0.3, k2=0.1, k3=0.9.
S7, the event analysis object for being denoted as having a power failure, by same day route head end and the electric current of end, active and idle
It substitutes into the check and correction model that has a power failure to be proofreaded, after proofreading successfully, obtains time of origin in Iimax, Ijmax, Pimax, Pjmax
Earliest one is used as power off time.Check and correction failure, then abandon this event information.
S8, the event analysis object for being denoted as power transmission, by same day route head end and the electric current of end, active and idle
It substitutes into power transmission check and correction model to be proofreaded, after proofreading successfully, obtains time of origin in Iimax, Ijmax, Pimax, Pjmax
Earliest one is used as electric power feeding time.
In this way, in present embodiment, when by route head end and the electric current of end, active and idle calculating to line outage
Between and route electric power feeding time checked, realize the verification for line events in power grid same day event statistics information, exclude
Invalid event, in this way, ensure that the effective and accurate of the power-off event filtered out and power transmission event, based on the route filtered out
Event carries out line status analysis and also improves to the accurate of power network line state analysis, and improves analysis efficiency.
In present embodiment, after line events verification, power off time is obtained according to Iimax, Ijmax, Pimax, Pjmax
Or electric power feeding time, further perfect temporal information enrich the reference data of line status analysis.
The accurate analysis method of electric power dispatching system line status that present embodiment provides further includes step S9: judging route
State handover event reason, judgment method the following steps are included:
Maintenance plan information in S91, the dispatching log on the acquisition power grid same day, and standardize to maintenance plan information
Processing.Obtain the circuit number for including in maintenance plan, and event analysis object corresponding with circuit number.In this step,
Standardization processing is carried out to maintenance plan information method particularly includes: by route number information in maintenance plan information and event point
The circuit number analysed in object is unified.For example, " 1#, 2#, 3# " in maintenance plan information is replaced with " #1, #2, #3 ", or
" I, II, III " is replaced with to " I, II, III ".Specifically, dispatching log is transferred from PMS system in present embodiment.
S91A, for the event analysis object for being denoted as power transmission, judge in corresponding maintenance plan information with the presence or absence of sending
Electric plan condition is, then by line status handover event reason labeled as plan.It is no, then abandon this line events information.
Power transmission plan condition are as follows: route head end breaker remote signalling value switchs to high level, line end breaker by low level
Remote signalling value low level switchs to low level, and line end by high level by switching to high level, route head end grounding switch remote signalling value
Breaker remote signalling value switchs to low level by high level.
S91B, for the event analysis object for being denoted as having a power failure, judge in corresponding maintenance plan information with the presence or absence of stopping
Electric plan condition is, then by line status handover event reason labeled as plan.It is no, then abandon this line events information.
Power failure plan condition are as follows: route head end breaker remote signalling value switchs to low level, line end breaker by high level
Remote signalling value switchs to low level by high level, and route head end grounding switch remote signalling value switchs to high level, and line end by low level
Breaker remote signalling value switchs to high level by low level.
S92, acquisition are present in the exception handling information on the dispatching log same day and are not present in maintenance plan information
Circuit number, and event analysis object corresponding with circuit number.
S92A, for the event analysis object for being denoted as power transmission, if route head end breaker and line end breaker
Remote signalling value is low level, and route head end grounding switch and line end grounding switch remote signalling value are high level, then by line
Line state handover event reason is labeled as accident.Conversely, then abandoning this line events information.
S92B, for be denoted as have a power failure event analysis object, if route head end breaker and line end breaker
Remote signalling value is high level, and route head end grounding switch and line end grounding switch remote signalling value are low level, then by line
Line state handover event reason is labeled as accident.Conversely, then abandoning this line events information.
The circuit number that S93, acquisition are not present in exception handling information and are not present in maintenance plan information, and
Event analysis object corresponding with circuit number.
S93A, for the event analysis object for being denoted as power transmission, if route head end breaker switchs to high electricity by low level
Flat or end breaker switchs to high level by low level, then line status handover event reason is labeled as scheduling.Conversely, then abandoning
This line events information.
S93B, for be denoted as have a power failure event analysis object, if route head end breaker switchs to low electricity by high level
Flat or end breaker switchs to low level by high level, then line status handover event reason is labeled as scheduling.Conversely, then abandoning
This line events information.
In this way, in present embodiment, by circuit number combination dispatching log and line events, according to maintenance plan information
The retrospect of line state handover event reason is furthermore achieved with exception handling information.In this way, can finally be obtained in present embodiment
It takes state handover event, line name, route ID, affiliated plant stand, affiliated area, time of origin, state switch reasons etc. and fills
Enter route machine account information, ensure that the perfect and abundant of route machine account information, route machine account information is then pushed into network clothes
It is engaged in device interface, so that staff knows power network line state according to route machine account information.
The above, preferable specific embodiment only of the present invention, but protection scope of the present invention not office
Be limited to this, anyone skilled in the art in the technical scope disclosed by the present invention, technology according to the present invention
Scheme and its inventive concept are subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (9)
1. a kind of accurate analysis method of electric power dispatching system line status, which comprises the following steps:
S1, the information for obtaining all routes in power grid extract the number of each route, and circuit number are stored to preset data
In library；
S2, power grid same day event statistics information is obtained, and obtains accident abnormality information and operation from same day event statistics information
Modification information；Accident abnormality information aggregate=A-B, A are the event comprising tripping in same day event statistics information, and B is same day thing
It include the event of successful reclosing in part statistical information；Modification information set=C-D is operated, C is to wrap in same day event statistics information
It is in same day event statistics information includes factory that row containing transhipment, which perhaps turns the event D of maintenance, is stood or the event of field；
The accident abnormality information and operation modification information that S3, acquisition include circuit number are as event analysis object；
S4, by event category be have a power failure and power transmission, and in the text of predeterminable event information keyword and event corresponding relationship；
Keyword in S5, each event analysis object of retrieval, and the corresponding route thing of event analysis object is judged according to keyword
Part is to have a power failure or power transmission rower of going forward side by side shows；
S6, setting, which have a power failure, proofreads model:
{(Iimax-Iimin)/Iimax>k1&(Ijmax-Ijmin)/Ijmax>k1}U{(Pimax-Pimin)/P imax>k2&
(Pjmax-Pjmin)/Pjmax>k2}；
Power transmission is set and proofreads model:
{ 1 > (Iimax-Iimin)/Iimax >=k3&1 > (Ijmax-Ijmin)/Ijmax >=k3 } U { 1 > (Pimax-
Pimin)/Pimax >=k3&1 > (Pjmax-Pjmin)/Pjmax >=k3 }；K1 ﹤ k3, k2 ﹤ k3；
Wherein, Iimax, Pimax and Qimax are current maxima, active maximum value and the idle maximum value of same day route head end,
Iimin, Pimin and Qimin are current minimum, active minimum value and the idle minimum value of same day route head end；Ijmax,
Pjmax and Qjmax be same day line end current maxima, active maximum value and idle maximum value, Ijmin, Pjmin and
Qjmin is current minimum, active minimum value and the idle minimum value of same day line end；
S7, the event analysis object for being denoted as having a power failure, by same day route head end and the electric current of end, active and idle substitution
The check and correction model that has a power failure is proofreaded, and after proofreading successfully, it is earliest to obtain time of origin in Iimax, Ijmax, Pimax, Pjmax
One be used as power off time；Check and correction failure, then abandon this event information；
S8, the event analysis object for being denoted as power transmission, by same day route head end and the electric current of end, active and idle substitution
Power transmission check and correction model is proofreaded, and after proofreading successfully, it is earliest to obtain time of origin in Iimax, Ijmax, Pimax, Pjmax
One be used as electric power feeding time.
2. the accurate analysis method of electric power dispatching system line status as described in claim 1, which is characterized in that in step S1,
Line information is read from saving to adjust in D5000 system.
3. the accurate analysis method of electric power dispatching system line status as described in claim 1, which is characterized in that in step S2,
Power grid same day event statistics information is read in OMS system from saving to adjust.
4. the accurate analysis method of electric power dispatching system line status as described in claim 1, which is characterized in that in step S4,
The corresponding keyword having a power failure includes: to pull open, deactivate and trip；The keyword of corresponding power transmission includes: to close.
5. the accurate analysis method of electric power dispatching system line status as described in claim 1, which is characterized in that k2 ﹤ k1 ﹤ k3.
6. the accurate analysis method of electric power dispatching system line status as claimed in claim 5, which is characterized in that k1=0.3, k2
=0.1, k3=0.9.
7. the accurate analysis method of electric power dispatching system line status as described in claim 1, which is characterized in that further include step
S9: judging line status handover event reason, judgment method the following steps are included:
Maintenance plan information in S91, the dispatching log on the acquisition power grid same day, and maintenance plan information is carried out at standardization
Reason；Obtain the circuit number for including in maintenance plan, and event analysis object corresponding with circuit number；
S91A, for the event analysis object for being denoted as power transmission, judge in corresponding maintenance plan information with the presence or absence of power transmission meter
The condition of drawing is, then by line status handover event reason labeled as plan；It is no, then abandon this line events information；
Power transmission plan condition are as follows: route head end breaker remote signalling value switchs to high level, line end breaker remote signalling by low level
Value low level switchs to low level, and line end open circuit by high level by switching to high level, route head end grounding switch remote signalling value
Device remote signalling value switchs to low level by high level；
S91B, for be denoted as have a power failure event analysis object, judge in corresponding maintenance plan information with the presence or absence of have a power failure meter
The condition of drawing is, then by line status handover event reason labeled as plan；It is no, then abandon this line events information；
Power failure plan condition are as follows: route head end breaker remote signalling value switchs to low level, line end breaker remote signalling by high level
Value switchs to low level by high level, and route head end grounding switch remote signalling value switchs to high level, and line end open circuit by low level
Device remote signalling value switchs to high level by low level；
The route that S92, acquisition are present in the exception handling information on the dispatching log same day and are not present in maintenance plan information
Number, and event analysis object corresponding with circuit number；
S92A, for the event analysis object for being denoted as power transmission, if route head end breaker and line end breaker remote signalling
Value is low level, and route head end grounding switch and line end grounding switch remote signalling value are high level, then by route shape
State handover event reason is labeled as accident；Conversely, then abandoning this line events information；
S92B, for be denoted as have a power failure event analysis object, if route head end breaker and line end breaker remote signalling
Value is high level, and route head end grounding switch and line end grounding switch remote signalling value are low level, then by route shape
State handover event reason is labeled as accident；Conversely, then abandoning this line events information；
The circuit number that S93, acquisition are not present in exception handling information and are not present in maintenance plan information, and and line
Number corresponding event analysis object in road；
S93A, for the event analysis object for being denoted as power transmission, if route head end breaker by low level switch to high level or
End breaker switchs to high level by low level, then line status handover event reason is labeled as scheduling；Conversely, then abandoning this
Line events information；
S93B, for be denoted as have a power failure event analysis object, if route head end breaker by high level switch to low level or
End breaker switchs to low level by high level, then line status handover event reason is labeled as scheduling；Conversely, then abandoning this
Line events information.
8. the accurate analysis method of electric power dispatching system line status as claimed in claim 7, which is characterized in that in step S91,
Maintenance plan information carries out standardization processing method particularly includes: by route number information and event analysis in maintenance plan information
Circuit number in object is unified.
9. the accurate analysis method of electric power dispatching system line status as claimed in claim 7, which is characterized in that dispatching log from
It is transferred in PMS system.
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| Publication number | Priority date | Publication date | Assignee | Title |
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