CN107834523B - Extra-high voltage direct-current fault diagnosis system and working method based on model and rule base - Google Patents
Extra-high voltage direct-current fault diagnosis system and working method based on model and rule base Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
- H02H7/263—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of measured values
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- 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
- G01R31/08—Locating faults in cables, transmission lines, or networks
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
- H02H7/262—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of switching or blocking orders
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- H02J13/0017—
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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
- H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
-
- 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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- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- 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
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/20—Systems supporting electrical power generation, transmission or distribution using protection elements, arrangements or systems
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- 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
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- 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
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
Extra-high voltage direct-current fault diagnosis system and working method based on model and rule base.Belong to Power System Intelligent analysis and control technology field.Currently, the development of extra-high voltage alternating current-direct current, more DC grids brings great challenge to the safe and stable operation of power grid.The present invention establishes DC Model in local intelligent dispatching of power netwoks control system, carries out fault diagnosis to extra-high voltage direct-current in conjunction with real-time displacement signal, protection signal, the rule-based library of telemetry.Diagnostic-type includes: that the change of current becomes fault diagnosis, valve group fault diagnosis, direct current monopole locking fault diagnosis, DC bipolar block fault diagnosis, alternating current filter fault diagnosis, the over the ground excessive diagnosis of DC current, commutation failure diagnosis, DC operation state is monitored simultaneously, diagnostic result and operating status are alerted in the work station of Dispatching Control System with pushing away diagram form.Extra-high voltage direct-current real time execution monitoring means are improved, promote regulation operations staff in extra-high voltage direct-current failure disposing capacity.
Description
Technical field
The present invention relates to fault diagnosis fields, more particularly to are led based on the extra-high voltage direct-current fault diagnosis of model and rule base
Domain.
Background technique
With the fast development of China's power grid, extra-high voltage alternating current-direct current, more direct current mixed connection patterns have been preliminarily formed at present, not
Come that extra-high voltage alternating current-direct current, more direct currents be remote, large capacity transmission pattern will further enhance.Extra-high voltage alternating current-direct current, more direct currents
The development of net brings great challenge to the safe and stable operation of power grid, reciprocal effect between the more direct currents of power grid alternating current-direct current, at different levels
Reciprocal effect between power grid is increasingly prominent, and complicated, changeable situation is presented in the safety and stability characteristic of power grid.
The Operation at full power of UHVDC Transmission Lines brings significant pressure to electric power netting safe running, objectively requires system
System operations staff has real-time perception operation of power networks state, grasps operation of power networks trend, Rapid Implementation power grid controls in advance comprehensively
Ability.And corresponding precautionary measures is taken to improve the operating status of system, prevent the generation of large area blackout, is simultaneously
The safe and stable operation of power grid provides valuable reference.
Summary of the invention
The technical problem to be solved in the present invention and the technical assignment of proposition are to be improved and improved to prior art,
The extra-high voltage direct-current fault diagnosis system based on model and rule base is provided, to realize the quick and precisely announcement of extra-high voltage direct-current failure
Alert purpose.For this purpose, the present invention takes following technical scheme.
Extra-high voltage direct-current fault diagnosis system based on model and rule base, characterized by comprising:
Basic information modeling module: it is built for primary equipment, interval, the protection signal to UHVDC converter station
Mould；Increase change of current changing distance, valve group interval, direct current interpolar in spacing sheet in Dispatching Control System every, filter interval；In
Increase direct current pole equipment in the exchange line segment endpoint table of Dispatching Control System, the change of current becomes equipment, valve group equipment；In scheduling controlling system
Increase filter apparatus in the bus table of system, increases the protection signal for needing to acquire in the protection signal table of Dispatching Control System
Model；After model foundation, primary equipment is associated with corresponding interval, and protection signal is associated with corresponding interval, will protect in this way
Protect signal association；Judgment basis when being defined the alarm grade of protection signal using as fault diagnosis；
Information acquisition module: switch changed position remote signalling, the switch change forwarded for real-time reception from Dispatching Control System
Position SOE, protection signal remote signalling, the telemetry for protecting signal SOE and related measuring point, and it is comprehensive to be buffered in Dispatching Control System
In the tables of data of intelligent alarm, to model fitting module and logistic diagnosis resume module；
Model fitting module: being connected with information acquisition module, will be relevant to DC equipment for handling buffer area signal
Switch changed position remote signalling, protection signal remote signalling, protects signal SOE and the telemetry of related measuring point to filter out at switch changed position SOE
Come, fault diagnosis signal sequence is combined into as unit of equipment, for logistic diagnosis resume module；
Logistic diagnosis module: being connected with model fitting module, for the pretreatment knot according to model fitting module to signal
Signal sequence is brought into logistic diagnosis by fruit, judges whether DC equipment breaks down；DC line earthing pole electricity is monitored simultaneously
Stream and extra-high voltage direct-current operating status generate the excessive alarm of DC current over the ground when grounding electrode electric current is more than threshold value；Diagnosis
Type includes: change of current change fault diagnosis, valve group fault diagnosis, direct current monopole is latched fault diagnosis, DC bipolar block failure is examined
The excessive diagnosis of disconnected, alternating current filter fault diagnosis, over the ground DC current, commutation failure diagnosis；
As a result display module: being connected with logistic diagnosis module, in the extra-high straightening for receiving the sending of logistic diagnosis module
After flowing failure message, by diagnostic result and operating status to push away diagram form alarm.
Comprehensive intelligent analysis and alarm integration using smart grid Dispatching Control System from adopt direct current plant stand switch changed position,
The DC Line Fault warning information that protection signal, telemetering jump signal push in real time realizes extra-high voltage direct-current failure and operation
The on-line analysis and alarm of mode, it is automatic using computer using the existing data of dispatching terminal when DC Line Fault occurs for power grid
Mode complete the process of previous dispatcher's manual analysis failure, fast and accurately judge DC Line Fault equipment, assessment one or two
Secondary device action behavior correctness, and dispatching workstations carry out alarm be the quick handling failure of dispatcher, restore electricity and
It formulates Plant maintenance plan and aid decision is provided.
The extra-high voltage direct-current fault diagnosis system based on model and rule base that it is a further object to provide a kind of
Diagnostic method comprising following steps:
1) basic information models: modeling to the primary equipment of UHVDC converter station, interval, protection signal；In
Increase change of current changing distance, valve group interval, direct current interpolar in spacing sheet in Dispatching Control System every, filter interval；It is dispatching
Increase direct current pole equipment in the exchange line segment endpoint table of control system, the change of current becomes equipment, valve group equipment；In Dispatching Control System
Increase filter apparatus in bus table, increases the protection signal mode for needing to acquire in the protection signal table of Dispatching Control System
Type；After model foundation, primary equipment is associated with corresponding interval, and protection signal is associated with corresponding interval, in this way will protection
Signal association is set；Judgment basis when being defined the alarm grade of protection signal using as fault diagnosis；
2) information collection: switch changed position remote signalling that real-time reception is forwarded from Dispatching Control System, switch changed position SOE,
The telemetry of signal remote signalling, protection signal SOE and related measuring point is protected, and is buffered in Dispatching Control System comprehensive intelligent announcement
In alert tables of data, to Model Matching step and logistic diagnosis step process；
3) Model Matching: processing buffer area signal, will switch changed position remote signalling relevant to DC equipment, switch changed position SOE,
The telemetry of protection signal remote signalling, protection signal SOE and related measuring point screens, and failure is combined into as unit of equipment
Diagnostic signal sequence, for logistic diagnosis step process；
4) logistic diagnosis: according to Model Matching step to the pre-processed results of signal, signal sequence is brought into logic and is examined
It is disconnected, judge whether DC equipment breaks down；DC line grounding electrode electric current and extra-high voltage direct-current operating status are monitored simultaneously；When
When being diagnosed as breaking down, extra-high voltage direct-current failure message is issued；Extra-high voltage direct-current fault diagnosis be divided into the change of current become fault diagnosis,
It is valve group fault diagnosis, direct current monopole locking fault diagnosis, DC bipolar block fault diagnosis, alternating current filter fault diagnosis, right
The excessive fault diagnosis of ground DC current, commutation failure fault diagnosis；
5) result is shown: after the extra-high voltage direct-current failure message for receiving the sending of logistic diagnosis step, by diagnostic result and
Operating status is to push away diagram form alarm.
Further, in step 1), primary equipment, the modeling for protecting signal, comprising:
It needs to increase direct current gap model in the platform spacing sheet of Dispatching Control System, each DC converter station needs to establish
Between interval, including the interval of pole 1, the interval of pole 2, the high-end change of current changing distance in pole 1,1 low side change of current changing distance of pole, the high-end change of current in pole 2 change
Every, 2 low side change of current changing distance of pole, the high-end valve group interval in pole 1,1 low side valve group interval of pole, the high-end valve group interval in pole 2,2 low side of pole
Between valve group interval, the first big group alternating current filter interval, second largest group of alternating current filter interval, the third-largest group of alternating current filter
Every, the fourth-largest group of alternating current filter interval；
It needs to increase DC equipment model, each DC converter in the platform exchange line segment endpoint table of Dispatching Control System
It includes: that pole 1, pole 2, the high-end change of current change in pole 1,1 low side change of current change of pole, the high-end change of current change in pole 2, pole 2 are low that DC equipment need to be established by, which standing,
Hold change of current change, the high-end valve group in pole 1,1 low side valve group of pole, the high-end valve group in pole 2,2 low side valve group of pole；
It needs to increase DC equipment model in the platform bus table of Dispatching Control System, each DC converter station needs to establish
DC equipment includes: the first big group alternating current filter 61M, second largest group of alternating current filter 62M, the third-largest group of alternating current filter
63M, the fourth-largest group of alternating current filter 64M；
It needs to increase direct current protecting signal model in the platform protection signal table of Dispatching Control System, according to converter station reality
Situation definition protection signal is accessed on border；
The incidence relation of the newly-built association of direct current diagnostic state table direct current primary equipment and switch, and record DC Line Fault diagnosis
Information；
The incidence relation of the newly-built association of direct current mutation parameter table direct current primary equipment and telemetering, and cache telemetry.
Further, in step 3), Model Matching includes the Model Matching of switching signal, the model for protecting signal
Match；
The Model Matching of switching signal, including can find corresponding direct current from switch by direct current diagnostic state table primary
Equipment, if switch can be associated with direct current primary equipment, switching signal enters DC Line Fault diagnosing sequence；
The Model Matching of signal is protected, including direct current primary equipment can be associated with by interval, if protection signal can close
It is linked to direct current primary equipment, then signal is protected to enter DC Line Fault diagnosing sequence.
Further, telemetering ID of the telemetered signal monitoring configuration in direct current mutation parameter table, and by real-time telemetering number
It is recorded according to the related DC equipment for being stored in direct current diagnostic state table.
Further, in step 4):
Change of current accident barrier becomes switch sub-gate signal according to the change of current and the change of current becomes accident class protection signal and diagnosed, wherein
The change of current becomes switch sub-gate signal and refers to two switches in a disguised form connected with the change of current separating brake simultaneously, if having a switch point before accident
Lock, as long as then there is a switch sub-gate signal；Wherein the change of current becomes accident class protection signal and becomes equipment to be associated with the change of current
Accident class protection signal；
Valve group failure protects signal and valve group current break to be diagnosed according to logic valve group accident class；Wherein valve group thing
Therefore class protection signal refers to the accident class protection signal for being associated with valve group equipment；Valve group current break refers to the electric current of valve group
It is mutated drift or less；
Direct current monopole is latched failure, protects signal, change of current time variant voltage mutation/direct current pole power prominent according to direct current pole accident class
Change is diagnosed；Wherein direct current pole accident class protection signal refers to the accident class protection signal for being associated with direct current pole equipment；
The mutation of change of current time variant voltage refers to the voltage jump of the extremely affiliated change of current change of direct current to drift hereinafter, direct current pole chugging refers to direct current
Pole actual DC power mutates, and mutation value is greater than threshold value；Between all signal times of implementation requirements and telemetering mutation time
Every being no more than 15 seconds, direct current pole chugging threshold is 150MW, is supported by actual conditions modification signal interval and mutation door
Sill；
DC bipolar block failure meets monopole locking Diagnostic Strategy according to the pole 1 of same direct current system, pole 2 simultaneously, sentences
It is disconnected to have direct current system bipolar locking failure；
Alternating current filter failure, according to the two of alternating current filter groups of ACF switch sub-gate signals and alternating current filter accident class
Signal is protected, and DC line is diagnosed in Operation at full power；Wherein alternating current filter accident class protection signal is
Refer to the accident class protection signal for being associated with alternating current filter equipment；
Commutation failure failure, according to monitoring control class signal commutation failure prediction signal starting commutation failure diagnosis, if
It generates the alarm of protection act commutation failure or commutation failure protection action message then thinks to generate commutation failure failure；Basis simultaneously
Whether the exchange side of WAMS monitoring direct current system disturbs, and judges that this commutation failure is caused by power network fluctuation, or by controlling
Strategy causes.
Further, become the sub-gate signal that even switchs and in a disguised form closed with the change of current when receiving the change of current within the set time
When the accident class protection signal of connection, it is diagnosed as change of current accident barrier, wherein time period threshold is empirical value, be can configure；
It is protected when monitoring valve group electric current generation mutation within the set time and receiving accident class associated with valve group
When protecting action signal, it is diagnosed as valve group accident barrier, wherein valve group current break threshold and time period threshold are empirical value, can be matched
It sets；
When receiving within the set time and the extremely associated accident class protection signal of direct current and monitor direct current
When the connected change of current time variant voltage of pole power or direct current pole generates mutation, it is diagnosed as direct current monopole locking failure, wherein direct current pole power
Being mutated threshold, change of current time variant voltage mutation threshold, time period threshold is empirical value, be can configure；
When two direct current poles for being diagnosed to be a direct current system in the time of setting are all broken down, it is double to be diagnosed as direct current
Pole is latched failure, and wherein time period threshold is empirical value, can configure；
When filter current power is more than threshold, the two groups of ACF switch for monitoring filter within the set time is sent out
Lock estranged, and when receiving accident class protection signal associated with filter, it is diagnosed as filter failure, wherein filter
Power threshold, time period threshold are empirical value, be can configure；
When the grounding electrode electric current of DC line is more than threshold value, it is excessive to be diagnosed as DC current over the ground, wherein electric current door
Threshold value is empirical value, be can configure；
It is moved when receiving commutation failure prediction signal and commutation failure alarm signal within the set time, changing unsuccessfully protection
When making one of both signals, it is diagnosed as commutation failure, wherein time period threshold is empirical value, be can configure.
Further, in step 5), in the extra-high voltage direct-current failure message for receiving the sending of logistic diagnosis step, in client
It releases alarm man-machine interface and shows to include failure direct current system title, fault type, breakdown switch separating brake information, error protection in end
The important measurement monitoring information of action message, failure direct current system operating status, PMU, the important measurement of SCADA monitor information.
Further, the information that alarm man-machine interface is shown, includes following content:
Direct current alerts window title, includes currently logged on user's title and current login owning user group；
Direct current alarm icon；
The DC Line Fault time, when according to Year/Month/Day: point: the time character string of second format description, middle age are retouched with four
State, the moon, day, when, minute, second use two descriptions respectively；
DC Line Fault device name is described according to affiliated plant stand device name, and affiliated plant stand and device name are equal
For the title of device model description；
DC Line Fault type, including change of current accident barrier, valve group failure, direct current monopole locking failure, DC bipolar block event
Barrier, alternating current filter failure, DC current is excessive over the ground, commutation failure；
Signal summary info is protected, shows that the protection signal Chinese that level of signal relevant to failure is accident describes, presses
Time-sequencing；
Details button is protected, all protection act information relevant to failure can be popped up by clicking button, with list shape
Formula shows that each protection act information in list is carried out by operating time of protection, protection title, level of signal, signal type
Description；
Details button is switched, all switch motion information relevant to failure can be popped up by clicking button, with list shape
Formula shows that each switch motion information in list by the switch motion time, switch names, switchs division state, signal type
It is described；
Measurement information button, measurement monitoring information relevant to failure, measurement relevant to failure can be checked by clicking button
Information in database by being configured, and to realize, automatic trigger is monitored after failure.It is shown with tabular form, each in list
Monitoring information is measured, is described by value, real value, limit value after value, failure before measurement type, device name, failure；
The button that direct transfers is alerted, other scheduling can be pushed to by the wide-area services bus of platform for fault message by clicking button
Control system, wherein goal systems is configurable；
Alert the state that direct transfers, the goal systems title and goal systems transmission state that display alarm direct transfers, transmission state
Including it is successful, unsuccessful, do not send.
Further, direct current diagnostic state table, according to mark, DC equipment ID, relevant device 01, relevant device 02, straight
Flow fault time, direct current telemetering fault time, direct current alarm time, alarm type, telemetry 01, telemetry 02, telemetering
Data 03, telemetry 04, telemetry 05, telemetry 06, telemetry 07, telemetry 08, telemetry 09, telemetering
Data 10 survey number data 11, telemetry 12, telemetry 13, telemetry 14, telemetry 15, telemetry 16, telemetering
Data 17, telemetry 18, telemetry 19, telemetry 20, direct current system title, direct current measure variation 01, direct current measures
Variation 02, direct current measure type 01, direct current measures type 02, related switch 01, related switch 02, related switch 03, correlation and opens
04 is closed, is described；
Direct current mutation parameter table, according to mark, telemetering ID, DC equipment ID, relevant device 01, relevant device 02, mutation
Threshold value, mutation percentage, drift value, are described.
The utility model has the advantages that
1, the technical program establishes extra-high voltage direct-current model and extra-high voltage in local intelligent dispatching of power netwoks control system
DC Line Fault diagnosis rule base, in conjunction with real-time displacement signal, protection signal, the rule-based library of telemetry to extra-high voltage direct-current
Carry out fault diagnosis.DC operation state is monitored simultaneously, the work of diagnostic result and operating status in Dispatching Control System
It stands to push away diagram form alarm, improves extra-high voltage direct-current real time execution monitoring means, promote regulation operations staff in extra-high straightening
Flow failure disposing capacity.
2, the responsibility of the technical program combination management and running department from management and running personnel's quick sensing failure, grasps event
Barrier disposition main points and the angle for reducing power networks risk are set out, and targetedly extra-high voltage direct-current failure is alerted,
It is worth with important practical, the deficiency of existing extra-high voltage direct-current accident risk sensing capability can be made up, effectively improve power grid security
Operation level and risk preventing ability.
Detailed description of the invention
Fig. 1 is flow chart of the invention.
Fig. 2 is Model Matching schematic diagram of the invention.
Fig. 3 is that the change of current of the invention becomes diagnosis logic figure.
Fig. 4 is valve group diagnosis logic figure of the invention.
Fig. 5 is that direct current monopole of the invention is latched diagnosis logic figure.
Fig. 6 is DC bipolar block diagnosis logic figure of the invention.
Fig. 7 is alternating current filter diagnosis logic figure of the invention.
Fig. 8 is commutation failure diagnosis logic figure of the invention.
Specific embodiment
Technical solution of the present invention is described in further detail below in conjunction with Figure of description.
As shown in Figure 1, the extra-high voltage direct-current fault diagnosis system based on model and rule base includes:
Basic information modeling module: it is built for primary equipment, interval, the protection signal to UHVDC converter station
Mould；Increase change of current changing distance, valve group interval, direct current interpolar in spacing sheet in Dispatching Control System every, filter interval；In
Increase direct current pole equipment in the exchange line segment endpoint table of Dispatching Control System, the change of current becomes equipment, valve group equipment；In scheduling controlling system
Increase filter apparatus in the bus table of system, increases the protection signal for needing to acquire in the protection signal table of Dispatching Control System
Model；After model foundation, primary equipment is associated with corresponding interval, and protection signal is associated with corresponding interval, will protect in this way
Protect signal association；Judgment basis when being defined the alarm grade of protection signal using as fault diagnosis；
Information acquisition module: switch changed position remote signalling, the switch change forwarded for real-time reception from Dispatching Control System
Position SOE, protection signal remote signalling, the telemetry for protecting signal SOE and related measuring point, and it is comprehensive to be buffered in Dispatching Control System
In the tables of data of intelligent alarm, to model fitting module and logistic diagnosis resume module；
Model fitting module: being connected with information acquisition module, will be relevant to DC equipment for handling buffer area signal
Switch changed position remote signalling, protection signal remote signalling, protects signal SOE and the telemetry of related measuring point to filter out at switch changed position SOE
Come, fault diagnosis signal sequence is combined into as unit of equipment, for logistic diagnosis resume module；
Logistic diagnosis module: being connected with model fitting module, for the pretreatment knot according to model fitting module to signal
Signal sequence is brought into logistic diagnosis by fruit, judges whether DC equipment breaks down；DC line earthing pole electricity is monitored simultaneously
Stream and extra-high voltage direct-current operating status generate the excessive alarm of DC current over the ground when grounding electrode electric current is more than threshold value；Diagnosis
Type includes: change of current change fault diagnosis, valve group fault diagnosis, direct current monopole is latched fault diagnosis, DC bipolar block failure is examined
The excessive diagnosis of disconnected, alternating current filter fault diagnosis, over the ground DC current, commutation failure diagnosis；
As a result display module: being connected with logistic diagnosis module, in the extra-high straightening for receiving the sending of logistic diagnosis module
After flowing failure message, by diagnostic result and operating status to push away diagram form alarm.
Extra-high voltage direct-current method for diagnosing faults process flow based on model and rule base of the invention is divided into five portions
Point, i.e., basic information modeling procedure, information collection step, Model Matching step, logistic diagnosis step, result show step.
S01: basic information modeling procedure builds the primary equipment of UHVDC converter station, interval, protection signal
Mould increases change of current changing distance, valve group interval, direct current interpolar in the spacing sheet in Dispatching Control System every, filter interval, In
Increase direct current pole equipment, the change of current change equipment, valve group equipment in the exchange line segment endpoint table of Dispatching Control System, in scheduling controlling system
Increase filter apparatus in the bus table of system, increases the protection signal for needing to acquire in the protection signal table of Dispatching Control System
Model.Primary equipment need to be associated with corresponding interval after model foundation, and protection signal is also required to association corresponding interval.Pass through this side
Formula will protect signal associate device.The alarm grade to protection signal is needed to be defined simultaneously, sentencing when as fault diagnosis
Disconnected foundation.
S02: switch changed position remote signalling that information collection step real-time reception is forwarded from Dispatching Control System, switch changed position
The telemetry of SOE, protection signal remote signalling letter, protection signal SOE and related measuring point, and it is comprehensive to be buffered in Dispatching Control System
In the tables of data of intelligent alarm, to Model Matching step and logistic diagnosis step process, the present invention can timing cleaning buffer area
Caching, the too long signal of erasing time, in this example cache-time be 15 minutes.
S03: Model Matching step process buffer area signal, it will switch changed position remote signalling relevant to DC equipment, switch change
Position SOE, protection signal remote signalling letter, signal SOE and the telemetry of related measuring point is protected to screen, the group as unit of equipment
Fault diagnosis signal sequence is synthesized, for logistic diagnosis step process.
Referring to Fig. 2, the wherein Model Matching of switching signal, including can be found by direct current diagnostic state table from switch
Corresponding direct current primary equipment, if switch can be associated with direct current primary equipment, switching signal enters DC Line Fault diagnosing sequence.
The Model Matching of signal is protected, including direct current primary equipment can be associated with by interval, if protection signal can be associated with direct current one
Secondary device then protects signal to enter DC Line Fault diagnosing sequence.Telemetered signal only monitors configuration in direct current mutation parameter table
Telemetering ID, and the related DC equipment that real-time telemetry is stored in direct current diagnostic state table is recorded.Telemetry value is adopted
It is divided between sample 5 seconds, saves 20 points altogether.It supports to modify the sampling interval by actual conditions.
S04: logistic diagnosis step, to the pre-processed results of signal, signal sequence is brought into and is patrolled according to Model Matching step
It collects diagnosis and judges whether DC equipment breaks down, all types of DC Line Fault diagnostic logics are as follows:
Referring to Fig. 3, the change of current becomes diagnosis logic according to " change of current becomes switch sub-gate signal+change of current and becomes the protection of accident class
Signal " is sentenced out, wherein " change of current becomes switch sub-gate signal " refers to two switches in a disguised form connected with the change of current separating brake simultaneously, before accident
Has a switch separating brake, as long as then there is a switch sub-gate signal；Wherein " change of current becomes accident class and protects signal " refers to
It is associated with the accident class protection signal that the change of current becomes equipment.All signal intervals of implementation requirements are no more than 15 seconds, support
Signal interval is modified by actual conditions.
Referring to Fig. 4, valve group diagnosis logic is according to logic " valve group accident class protects signal+valve group current break ".
Wherein " valve group accident class protects signal " refers to the accident class protection signal for being associated with valve group equipment；" valve group current break "
Refer to the current break to drift of valve group or less.All signal times of implementation requirements and current break time interval are no more than 15
Second, it supports to modify signal interval by actual conditions.
Referring to Fig. 5, direct current monopole is latched diagnosis logic according to " direct current pole accident class protects signal+change of current power transformation
Press mutation/direct current pole chugging ".Wherein " direct current pole accident class protects signal " refers to the accident class for being associated with direct current pole equipment
Protection signal；" mutation of change of current time variant voltage " refers to the voltage jump of the extremely affiliated change of current change of direct current to drift hereinafter, " direct current pole
Chugging " refers to that direct current pole actual DC power mutates, and mutation value is greater than threshold value.All signal times of implementation requirements
It is no more than 15 seconds with telemetering mutation time interval, direct current pole chugging threshold is 150MW, supports to modify signal by actual conditions
Time interval and mutation threshold.
Referring to Fig. 6, DC bipolar block diagnosis logic meets list according to pole 1, the pole 2 of same direct current system simultaneously
Pole is latched Diagnostic Strategy, judges direct current system bipolar locking failure.Implementation requirements pole 1,2 time between failures of pole are no more than 10
Second, it supports to modify signal interval by actual conditions.
Referring to Fig. 7, alternating current filter diagnosis logic according to " two groups of ACF of alternating current filter switch sub-gate signal+
Alternating current filter accident class protects signal ", and DC line needs Operation at full power.Wherein " alternating current filter accident class protection
Signal " refers to the accident class protection signal for being associated with alternating current filter equipment.All signal intervals of implementation requirements are not
More than 15 seconds, DC line operated in 7500MW or more, can modify DC line operation threshold and signal according to the actual situation
Time interval.
Referring to Fig. 8, commutation failure diagnosis logic is opened according to monitoring control class signal " commutation failure prediction " signal
Dynamic commutation failure diagnosis, thinks to produce if generating protection act " commutation failure alarm " or " commutation failure protection movement " information
Raw commutation failure failure.Simultaneously according to WAMS monitor direct current system exchange side whether disturb, hair judge this commutation failure be by
Caused by power network fluctuation or as caused by control strategy.
Logistic diagnosis step monitors DC line grounding electrode electric current (IDEL) simultaneously, when grounding electrode electric current is more than threshold value
Generate the excessive alarm of DC current over the ground.DC current threshold is 1000A in example, can modify threshold according to the actual situation.
Logistic diagnosis step monitors extra-high voltage direct-current operating status simultaneously, and the Chinese by matching direct current protecting signal is retouched
It states, monitoring includes " bipolar Ground return operation ", " operation of 1 Ground return of pole ", " operation of 1 metallic return of pole ", " pole 2 is greatly returned
Line operation ", " operation of 2 metallic return of pole " five class DC operation states.
S05: result shows that step in the extra-high voltage direct-current failure message for receiving the sending of logistic diagnosis step, is pushed away in client
It has alarm man-machine interface and shows to include failure direct current system title, fault type, breakdown switch separating brake information, fault protection
The important measurement monitoring information of information, failure direct current system operating status, PMU (supporting to pop up curve in list right button), SCADA weight
Measure the information such as monitoring information.
Extra-high voltage direct-current fault diagnosis system based on model and rule base shown in figure 1 above -6 is of the invention specific
Embodiment has embodied substantive distinguishing features of the present invention and progress, needs can be used according to actual, in enlightenment of the invention
Under, the equivalent modifications of shape, structure etc., the column in the protection scope of this programme are carried out to it.
Claims (10)
1. the extra-high voltage direct-current fault diagnosis system based on model and rule base, characterized by comprising:
Basic information modeling module: it is modeled for primary equipment, interval, the protection signal to UHVDC converter station；
Increase change of current changing distance, valve group interval, direct current interpolar in spacing sheet in Dispatching Control System every, filter interval；It is adjusting
It spends in the exchange line segment endpoint table of control system and increases direct current pole equipment, the change of current change equipment, valve group equipment；In Dispatching Control System
Bus table in increase filter apparatus, increase in the protection signal table of Dispatching Control System and need the protection signal mode that acquires
Type；After model foundation, primary equipment is associated with corresponding interval, and protection signal is associated with corresponding interval, in this way will protection
Signal association；Judgment basis when being defined the alarm grade of protection signal using as fault diagnosis；
Information acquisition module: the switch changed position remote signalling that is forwarded for real-time reception from Dispatching Control System, switch changed position
SOE, protection signal remote signalling, the telemetry of signal SOE and related measuring point are protected, and is buffered in the comprehensive intelligence of Dispatching Control System
In the tables of data that can be alerted, to model fitting module and logistic diagnosis resume module；
Model fitting module: being connected with information acquisition module, will switch relevant to DC equipment for handling buffer area signal
Displacement remote signalling, protection signal remote signalling, protects signal SOE and the telemetry of related measuring point to screen at switch changed position SOE,
Fault diagnosis signal sequence is combined into as unit of equipment, for logistic diagnosis resume module；
Logistic diagnosis module: being connected with model fitting module, will for the pre-processed results according to model fitting module to signal
Signal sequence is brought into logistic diagnosis, judges whether DC equipment breaks down；Simultaneously monitor DC line grounding electrode electric current and
Extra-high voltage direct-current operating status generates the excessive alarm of DC current over the ground when grounding electrode electric current is more than threshold value；Diagnostic-type
It include: that the change of current becomes fault diagnosis, valve group fault diagnosis, direct current monopole locking fault diagnosis, DC bipolar block fault diagnosis, hands over
Flow filter fault diagnosis, the over the ground excessive fault diagnosis of DC current, commutation failure fault diagnosis；
As a result display module: being connected with logistic diagnosis module, for receiving the extra-high voltage direct-current of logistic diagnosis module sending therefore
After hindering message, by diagnostic result and operating status to push away diagram form alarm.
2. the diagnostic method of the extra-high voltage direct-current fault diagnosis system based on model and rule base, it is characterised in that including following step
It is rapid:
1) basic information models: modeling to the primary equipment of UHVDC converter station, interval, protection signal；It is dispatching
Increase change of current changing distance, valve group interval, direct current interpolar in spacing sheet in control system every, filter interval；In scheduling controlling
Increase direct current pole equipment in the exchange line segment endpoint table of system, the change of current becomes equipment, valve group equipment；In the bus of Dispatching Control System
Increase filter apparatus in table, increases the protection signal model for needing to acquire in the protection signal table of Dispatching Control System；In
After model foundation, primary equipment is associated with corresponding interval, and protection signal is associated with corresponding interval, in this way closes protection signal
Join equipment；Judgment basis when being defined the alarm grade of protection signal using as fault diagnosis；
2) information collection: switch changed position remote signalling that real-time reception is forwarded from Dispatching Control System, switch changed position SOE, protection
Signal remote signalling, the telemetry for protecting signal SOE and related measuring point, and it is buffered in the alarm of Dispatching Control System comprehensive intelligent
In tables of data, to Model Matching step and logistic diagnosis step process；
3) Model Matching: processing buffer area signal, it will switch changed position remote signalling relevant to DC equipment, switch changed position SOE, protection
The telemetry of signal remote signalling, protection signal SOE and related measuring point screens, and fault diagnosis is combined into as unit of equipment
Signal sequence, for logistic diagnosis step process；
4) logistic diagnosis: according to Model Matching step to the pre-processed results of signal, signal sequence is brought into logistic diagnosis, is sentenced
Whether disconnected DC equipment breaks down；DC line grounding electrode electric current and extra-high voltage direct-current operating status are monitored simultaneously；Work as diagnosis
When to break down, extra-high voltage direct-current failure message is issued；Extra-high voltage direct-current fault diagnosis is divided into the change of current and becomes fault diagnosis, valve group
It is fault diagnosis, direct current monopole locking fault diagnosis, DC bipolar block fault diagnosis, alternating current filter fault diagnosis, straight over the ground
Galvanic electricity flows through major break down diagnosis, commutation failure fault diagnosis；
5) result is shown: after the extra-high voltage direct-current failure message for receiving the sending of logistic diagnosis step, by diagnostic result and operation
State is to push away diagram form alarm.
3. diagnostic method according to claim 2, it is characterised in that: in step 1), primary equipment protects building for signal
Mould, comprising:
It needs to increase direct current gap model in the platform spacing sheet of Dispatching Control System, between each DC converter station need to be established
Every, including the interval of pole 1, the interval of pole 2, the high-end change of current changing distance in pole 1,1 low side change of current changing distance of pole, the high-end change of current changing distance in pole 2,
2 low side change of current changing distance of pole, the high-end valve group interval in pole 1,1 low side valve group interval of pole, the high-end valve group interval in pole 2,2 low side valve group of pole
Interval, the first big group alternating current filter interval, second largest group of alternating current filter interval, the third-largest group of alternating current filter interval, the
Four big group alternating current filter intervals；
It needs to increase DC equipment model in the platform exchange line segment endpoint table of Dispatching Control System, each DC converter station needs
Establishing DC equipment includes: that pole 1, pole 2, the high-end change of current change in pole 1,1 low side change of current change of pole, the high-end change of current change in pole 2,2 low side of pole change
Rheology, the high-end valve group in pole 1,1 low side valve group of pole, the high-end valve group in pole 2,2 low side valve group of pole；
It needs to increase DC equipment model in the platform bus table of Dispatching Control System, each DC converter station need to establish direct current
Equipment includes: the first big group alternating current filter 61M, second largest group of alternating current filter 62M, the third-largest group of alternating current filter 63M, the
Four big group alternating current filter 64M；
It needs to increase direct current protecting signal model in the platform protection signal table of Dispatching Control System, be connect according to converter station is practical
Enter situation definition protection signal；
The incidence relation of the newly-built association of direct current diagnostic state table direct current primary equipment and switch, and record DC Line Fault diagnosis letter
Breath；
The incidence relation of the newly-built association of direct current mutation parameter table direct current primary equipment and telemetering, and cache telemetry.
4. diagnostic method according to claim 3, it is characterised in that:
In step 3), Model Matching includes the Model Matching of switching signal, the Model Matching for protecting signal；
The Model Matching of switching signal, including corresponding direct current can be found from switch by direct current diagnostic state table and once set
Standby, if switch can be associated with direct current primary equipment, switching signal enters DC Line Fault diagnosing sequence；
The Model Matching of signal is protected, including direct current primary equipment can be associated with by interval, if protection signal can be associated with
Direct current primary equipment then protects signal to enter DC Line Fault diagnosing sequence.
5. diagnostic method according to claim 3, it is characterised in that:
Telemetering ID of the telemetered signal monitoring configuration in direct current mutation parameter table, and real-time telemetry is stored in direct current and is examined
The related DC equipment of disconnected state table is recorded.
6. diagnostic method according to claim 2, it is characterised in that: in step 4):
Change of current accident barrier becomes switch sub-gate signal according to the change of current and the change of current becomes accident class protection signal and diagnosed, the wherein change of current
Become switch sub-gate signal and refers to two switches in a disguised form connected with the change of current separating brake simultaneously, if having a switch separating brake before accident,
As long as there is a switch sub-gate signal；Wherein the change of current becomes accident class protection signal to be associated with the accident class that the change of current becomes equipment
Protection signal；
Valve group failure protects signal and valve group current break to be diagnosed according to logic valve group accident class；Wherein valve group accident class
Protection signal refers to the accident class protection signal for being associated with valve group equipment；Valve group current break refers to the current break of valve group
To below drift；
Direct current monopole be latched failure, according to direct current pole accident class protect signal, change of current time variant voltage mutation/direct current pole chugging into
Row diagnosis；Wherein direct current pole accident class protection signal refers to the accident class protection signal for being associated with direct current pole equipment；The change of current
Time variant voltage mutation refers to the voltage jump of the extremely affiliated change of current change of direct current to drift hereinafter, direct current pole chugging refers to that direct current is extremely real
Border dc power mutates, and mutation value is greater than threshold value；All signal times of implementation requirements and telemetering mutation time interval are not
More than 15 seconds, direct current pole chugging threshold was 150MW, was supported by actual conditions modification signal interval and mutation threshold；
DC bipolar block failure meets monopole locking Diagnostic Strategy according to the pole 1 of same direct current system, pole 2 simultaneously, judges
Direct current system bipolar locking failure；
Alternating current filter failure is protected according to the two of alternating current filter groups of ACF switch sub-gate signals and alternating current filter accident class
Signal, and DC line is diagnosed in Operation at full power；Wherein alternating current filter accident class protection signal refers to pass
The accident class protection signal of alternating current filter equipment is joined；
Commutation failure failure, according to monitoring control class signal commutation failure prediction signal starting commutation failure diagnosis, if generated
The alarm of protection act commutation failure or commutation failure protection action message then think to generate commutation failure failure；Simultaneously according to WAMS
Whether the exchange side of monitoring direct current system disturbs, and judges that this commutation failure is caused by power network fluctuation, or by control strategy
Cause.
7. diagnostic method according to claim 6, it is characterised in that:
When receiving within the set time, the change of current becomes the sub-gate signal even switched and in a disguised form associated accident class is protected with the change of current
When protecting action signal, it is diagnosed as change of current accident barrier, wherein time period threshold is empirical value, be can configure；
It is moved when monitoring valve group electric current generation mutation within the set time and receiving accident class protection associated with valve group
When making signal, it is diagnosed as valve group accident barrier, wherein valve group current break threshold and time period threshold are empirical value, be can configure；
When receiving within the set time and the extremely associated accident class protection signal of direct current and monitor direct current pole function
When the connected change of current time variant voltage of rate or direct current pole generates mutation, it is diagnosed as direct current monopole locking failure, wherein direct current pole chugging
Threshold, change of current time variant voltage mutation threshold, time period threshold are empirical value, be can configure；
When two direct current poles for being diagnosed to be a direct current system in the time of setting are all broken down, it is diagnosed as DC bipolar and closes
Failure is locked, wherein time period threshold is empirical value, be can configure；
When filter current power is more than threshold, the two groups of ACF switch for monitoring filter within the set time occurs to divide
Lock, and when receiving accident class protection signal associated with filter, it is diagnosed as filter failure, wherein filter power
Threshold, time period threshold are empirical value, be can configure；
When the grounding electrode electric current of DC line is more than threshold value, it is excessive to be diagnosed as DC current over the ground, wherein electric current threshold value
For empirical value, can configure；
Believe when receiving commutation failure prediction signal and commutation failure alarm signal within the set time, changing unsuccessfully protection act
When one of number the two, it is diagnosed as commutation failure, wherein time period threshold is empirical value, be can configure.
8. diagnostic method according to claim 2, it is characterised in that: in step 5), receiving logistic diagnosis step hair
The extra-high voltage direct-current failure message haveing releases alarm man-machine interface in client and shows to include failure direct current system title, failure
The important measurement monitoring letter of type, breakdown switch separating brake information, fault protection information, failure direct current system operating status, PMU
The important measurement of breath, SCADA monitors information.
9. diagnostic method according to claim 8, it is characterised in that: the information that alarm man-machine interface is shown, comprising as follows
Content:
Direct current alerts window title, includes currently logged on user's title and current login owning user group；
Direct current alarm icon；
The DC Line Fault time, when according to Year/Month/Day: point: the time character string of second format description, middle age are described with four,
The moon, day, when, minute, second use two descriptions respectively；
DC Line Fault device name is described according to affiliated plant stand device name, and affiliated plant stand and device name are to set
The title of standby model description；
DC Line Fault type, including change of current accident barrier, valve group failure, direct current monopole locking failure, DC bipolar block failure, friendship
Flow that filter failure, DC current is excessive over the ground, commutation failure；
Signal summary info is protected, shows that the protection signal Chinese that level of signal relevant to failure is accident describes, temporally
Sequence；
Details button is protected, all protection act information relevant to failure can be popped up by clicking button, with tabular form exhibition
Show, each protection act information in list, is retouched by operating time of protection, protection title, level of signal, signal type
It states；
Details button is switched, all switch motion information relevant to failure can be popped up by clicking button, with tabular form exhibition
Show, each switch motion information in list, is carried out by switch motion time, switch names, switch division state, signal type
Description；
Measurement information button, measurement monitoring information relevant to failure, measurement information relevant to failure can be checked by clicking button
By being configured in database, to realize, automatic trigger is monitored after failure；
It is shown with tabular form, each measures monitoring information in list, by value, failure before measurement type, device name, failure
Value, real value, limit value are described afterwards；
The button that direct transfers is alerted, other scheduling controllings can be pushed to by the wide-area services bus of platform for fault message by clicking button
System, wherein goal systems is configurable；
The state that direct transfers is alerted, the goal systems title and goal systems transmission state, transmission state that display alarm direct transfers include
It is successful, unsuccessful, do not send.
10. diagnostic method according to claim 3, it is characterised in that:
Direct current diagnostic state table, according to mark, DC equipment ID, relevant device 01, relevant device 02, the DC Line Fault time, straight
Flow telemetering fault time, direct current alarm time, alarm type, telemetry 01, telemetry 02, telemetry 03, telemetering number
According to 04, telemetry 05, telemetry 06, telemetry 07, telemetry 08, telemetry 09, telemetry 10, survey number number
According to 11, telemetry 12, telemetry 13, telemetry 14, telemetry 15, telemetry 16, telemetry 17, telemetering number
Variation 01 is measured according to 18, telemetry 19, telemetry 20, direct current system title, direct current, direct current measures variation 02, DC quantity
Type 01, direct current measurement type 02, related switch 01, related switch 02, related switch 03, related switch 04 are surveyed, is described；
Direct current mutation parameter table, according to mark, telemetering ID, DC equipment ID, relevant device 01, relevant device 02, mutation threshold
Value, mutation percentage, drift value, are described.
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| CN111507862B (en) * | 2020-04-08 | 2023-08-15 | 国网湖南省电力有限公司 | State fault analysis method for extra-high voltage important secondary data stream |
| CN113779047B (en) * | 2020-06-09 | 2024-04-26 | 南京南瑞继保工程技术有限公司 | Fault analysis method and system based on logic template |
| CN111679653A (en) * | 2020-06-15 | 2020-09-18 | 中国南方电网有限责任公司超高压输电公司昆明局 | Intelligent fault recording device and direct-current field control loop fault positioning method |
| CN112632127B (en) * | 2020-12-29 | 2022-07-15 | 国华卫星数据科技有限公司 | Data processing method for real-time data acquisition and time sequence of equipment operation |
| CN112865164B (en) * | 2021-01-19 | 2022-09-16 | 南方电网科学研究院有限责任公司 | Method, device and medium for judging and controlling faults of hybrid direct-current power transmission system |
| CN113743764B (en) * | 2021-08-26 | 2024-04-05 | 贵州电网有限责任公司 | Method for judging spare power automatic switching action of scheduling master station |
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