CN112865164B - Method, device and medium for judging and controlling faults of hybrid direct-current power transmission system - Google Patents
Method, device and medium for judging and controlling faults of hybrid direct-current power transmission system Download PDFInfo
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- CN112865164B CN112865164B CN202110068998.9A CN202110068998A CN112865164B CN 112865164 B CN112865164 B CN 112865164B CN 202110068998 A CN202110068998 A CN 202110068998A CN 112865164 B CN112865164 B CN 112865164B
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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
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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
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/085—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution lines, e.g. overhead
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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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Abstract
According to the method, the device and the medium for judging and controlling the faults of the hybrid direct-current transmission system, the state data of the conventional direct-current transformer and the state data of the flexible direct-current transformer are obtained, the judging conditions of the state of the hybrid direct-current transformer are set to judge the gear states of the conventional direct-current transformer and the flexible direct-current transformer, the gear state of the hybrid direct-current transformer is judged according to the judged gear state of the conventional direct-current transformer and the judged gear state of the flexible direct-current transformer, the running state of the hybrid direct-current transmission system is controlled according to the gear state of the hybrid direct-current transformer, gear division of the hybrid direct-current transformer is more accurate and fine, the transmission system is required to be stopped only when the gear state of the hybrid direct-current transformer is judged to be the faults, and unnecessary stop of the transmission system can be reduced.
Description
Technical Field
The invention relates to the technical field of direct-current power transmission systems, in particular to a method, a device and a medium for judging and controlling faults of a hybrid direct-current power transmission system.
Background
The high-voltage direct-current transmission system mostly adopts an overhead transmission line, and a power system for transmitting energy between two or more alternating-current buses in a high-voltage direct-current mode becomes the high-voltage direct-current transmission system. High-voltage direct-current transmission systems are commonly in two forms, one is a conventional direct-current transmission system (LCC-HVDC) which performs current conversion through a semi-controlled device, and the other is a flexible direct-current transmission system (VSC-HVDC) which performs current conversion through a fully-controlled device. The conventional direct-current transmission system and the flexible direct-current transmission system both need to use the transformer, and the conventional direct-current transmission system is low in cost, mature in technology and large in transmission capacity, but the conventional direct-current transmission system has more gears limited by the angle range, the flexible direct-current transmission system is flexible to control, and the gears of the transformer are fewer.
In order to fully utilize the advantages of the conventional direct-current transmission system and the flexible direct-current transmission system, the conventional direct-current transmission system and the flexible direct-current transmission system are provided in the prior art, and in the conventional hybrid direct-current transmission system, when the gear of the conventional direct-current transformer is in a normal state or the gear of the flexible direct-current transformer is in an abnormal state, the operation of the whole hybrid direct-current transmission system needs to be stopped, so that the outage frequency of the transmission system is high, and the economic loss is large.
Disclosure of Invention
In view of the above-mentioned defects in the prior art, embodiments of the present invention provide a method, an apparatus, and a medium for determining and controlling a fault of a hybrid dc power transmission system, which can determine a fault type of the hybrid dc power transmission system, control an operation state of the power transmission system, and reduce unnecessary shutdown of the power transmission system.
The embodiment of the invention provides a method for judging and controlling faults of a hybrid direct-current power transmission system, which comprises the following steps:
a method for fault judgment and processing of a hybrid direct current transmission system, the method comprising:
acquiring first state data of a conventional direct current transformer and second state data of a flexible direct current transformer;
judging a first gear state of the conventional direct current transformer according to the first state data and a preset first judgment condition;
judging a second gear state of the flexible direct current transformer according to the second state data and a preset second judgment condition;
judging the overall gear state of the hybrid direct-current transformer according to the first gear state and the second gear state;
and controlling the operation of the hybrid direct-current power transmission system according to the whole gear state.
Preferably, the determining the first gear state of the conventional dc transformer according to the first state data and a preset first determination condition specifically includes:
when the first state data are identified to meet all the first judgment conditions, judging that the first gear state is a normal state;
when the first state data are identified not to meet all the first judgment conditions, judging that the first gear state is a fault state;
the first judgment condition includes: the conventional direct current transformer has no hardware fault, the tap joint of the conventional direct current transformer is not controlled in situ, the tap joint of the conventional direct current transformer does not actually change the position number, the indicated position of the tap joint of the conventional direct current transformer is not an invalid position, the conventional direct current transformer has no BCD decoding fault, the conventional direct current transformer has no power supply fault, and the conventional direct current transformer has no unlocking prohibition signal and the conventional direct current transformer has no tap regulation prohibition signal sent by the alternating current station.
Preferably, the determining the second gear state of the flexible dc transformer according to the second state data and a preset second determination condition specifically includes:
when the second state data are identified to meet all normal conditions in the second judgment condition, judging that the second gear state is a normal state;
when the second state data is identified to meet any abnormal condition in the second judgment conditions, judging that the second gear state is an abnormal state;
when the second state data is identified to meet any fault condition in the second judgment conditions, judging that the second gear state is a fault state;
the normal conditions include: the flexible direct current transformer has no hardware fault, the tap joint of the flexible direct current transformer is not controlled in situ, the tap joint of the flexible direct current transformer has no actual change position number, the indicated position of the tap joint of the flexible direct current transformer is not an invalid position, the flexible direct current transformer has no power failure and the flexible direct current converter transformer has no unlocking forbidding signal;
the exception condition includes: the flexible direct current transformer tap is controlled in situ, the position number of the flexible direct current transformer tap is actually changed, the invalid position of the flexible direct current transformer tap is indicated, and the flexible direct current BCD decoding fault or the flexible direct current power supply fault occurs;
the fault conditions include: and the flexible direct current transformer hardware fails or the converter transformer of the flexible direct current forbids unlocking signals.
Preferably, the determining the overall gear state of the hybrid dc transformer according to the first gear state and the second gear state specifically includes:
when the first gear state or the second gear state is a fault state, judging that the overall gear state is a fault state;
when the first gear state and the second gear state are both normal states, judging that the overall gear state is a normal state;
and when the first gear state is an abnormal state and the second gear state is a normal state, judging that the overall gear state is an abnormal state.
Preferably, the controlling the operation of the hybrid dc power transmission system according to the gear state of the hybrid dc transformer specifically includes:
when the overall gear state is a normal state, controlling the running state of the hybrid direct-current power transmission system to be unchanged, wherein the hybrid direct-current power transmission system can normally unlock, lock and keep running states;
when the overall gear state is an abnormal state, controlling the hybrid direct-current power transmission system to be in a locked running state or a running state, and not allowing the hybrid direct-current power transmission system to run in an unlocked state;
and when the integral gear state is a fault state, controlling the hybrid direct-current power transmission system to operate in a locking mode.
Another embodiment of the present invention further provides a device for determining and controlling a fault of a hybrid dc power transmission system, where the device includes: the device comprises a state data acquisition module, a first judgment module, a second judgment module, an integral judgment module and a control module;
the state data acquisition module is used for acquiring first state data of the conventional direct current transformer and second state data of the flexible direct current transformer;
the first judgment module is used for judging the gear state of the conventional direct-current transformer according to a preset first judgment condition;
the second judging module is used for judging the gear state of the flexible direct current transformer according to a preset second judging condition;
the integral judgment module is used for judging the integral gear state of the hybrid direct-current transformer according to the first gear state and the second gear state;
and the control module is used for controlling the operation of the hybrid direct-current power transmission system according to the whole gear state.
As a preferable mode, the first judging module includes a first normal judging unit and a first failure judging unit:
the second judgment module comprises a second normal judgment unit, a second abnormal judgment unit and a second fault judgment unit;
the first normal judging unit is used for judging that the first gear state is a normal state when the first state data is identified to meet the first judging condition;
the first fault judging unit is used for judging that the first gear state is a fault state when the first state data is identified not to meet the first judging condition;
the second normal judgment unit is used for judging that the second gear state is a normal state when the second state data is identified to meet the normal condition in the second judgment condition;
the second abnormality judgment unit is used for judging that the second gear state is an abnormal state when the second state data is identified to meet the abnormal condition in the second judgment condition;
the second fault judging unit is used for judging that the second gear state is a fault state when the second state data is identified to meet the fault condition in the second judging condition;
wherein the first judgment condition includes: the conventional direct current transformer has no hardware fault, the tap joint of the conventional direct current transformer is not controlled in situ, the tap joint of the conventional direct current transformer does not actually change the position number, the indicated position of the tap joint of the conventional direct current transformer is not an invalid position, the conventional direct current has no BCD decoding fault, the conventional direct current has no power supply fault, and the conventional direct current does not have an unlocking prohibition signal of the converter transformer and a tap regulation prohibition signal sent by the conventional direct current without alternating current station control;
the normal conditions include: the flexible direct current transformer has no hardware fault, the tap joint of the flexible direct current transformer is not controlled in situ, the tap joint of the flexible direct current transformer has no actual change position number, the indicated position of the tap joint of the flexible direct current transformer is not an invalid position, the flexible direct current transformer has no power failure and the flexible direct current converter transformer has no unlocking forbidding signal;
the exception condition includes: the flexible direct current transformer tap is controlled on site, the position number of the flexible direct current transformer tap is actually changed, the flexible direct current transformer tap indicates an invalid position, and the flexible direct current BCD decoding fault or the flexible direct current power supply fault occurs;
the fault conditions include: and the flexible direct current transformer hardware fails or the converter transformer of the flexible direct current forbids unlocking signals.
As another preferable mode, the whole judgment module includes a first whole judgment unit, a second whole judgment unit and a third whole judgment unit;
the control module comprises a first control module, a second control module and a third control module;
the first integral judgment unit is used for judging that the integral gear state is a fault state when the first gear state or the second gear state is the fault state;
the second integral judgment unit is used for judging that the integral gear state is a normal state when the first gear state and the second gear state are both normal states;
the third integral judgment unit is used for judging that the integral gear state is an abnormal state when the first gear state is an abnormal state and the second gear state is a normal state;
the first control unit is used for controlling the running state of the hybrid direct-current power transmission system to be unchanged when the overall gear state is a normal state, and the hybrid direct-current power transmission system can normally unlock, lock and keep running states;
the second control unit is used for controlling the hybrid direct-current power transmission system to be in a locked running state or a running state when the overall gear state is in an abnormal state, and not allowing the hybrid direct-current power transmission system to run in an unlocked state;
and the third control unit is used for controlling the hybrid direct-current power transmission system to run in a locking mode when the overall gear state is a fault state.
The present invention further provides a device for determining and controlling a fault of a hybrid dc power transmission system, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the method for determining and controlling a fault of a hybrid dc power transmission system according to any of the above embodiments when executing the program.
Yet another embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program is executed by a processor to implement the steps of the method for determining and controlling a fault of a hybrid direct current power transmission system according to any one of the above embodiments.
According to the method, the device and the medium for judging and controlling the faults of the hybrid direct-current transmission system, the state data of the conventional direct-current transformer and the state data of the flexible direct-current transformer are obtained, the judging conditions of the state of the hybrid direct-current transformer are set to judge the gear states of the conventional direct-current transformer and the flexible direct-current transformer, the gear state of the hybrid direct-current transformer is judged according to the judged gear state of the conventional direct-current transformer and the judged gear state of the flexible direct-current transformer, the running state of the hybrid direct-current transmission system is controlled according to the gear state of the hybrid direct-current transformer, gear division of the hybrid direct-current transformer is more accurate and fine, the transmission system is required to be stopped only when the gear state of the hybrid direct-current transformer is judged to be the faults, and unnecessary stop of the transmission system can be reduced.
Drawings
Fig. 1 is a schematic flowchart of a method for determining and controlling a fault of a hybrid dc power transmission system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a device for determining and controlling a fault of a hybrid dc power transmission system according to another embodiment of the present invention.
Fig. 3 is a schematic structural diagram of an apparatus for determining and controlling a fault of a hybrid dc power transmission system according to another embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic flow chart of a method for determining and controlling a fault of a hybrid direct-current power transmission system according to an embodiment of the present invention.
The embodiment of the invention provides a method for judging and controlling faults of a hybrid direct-current power transmission system, which comprises the following steps from S101 to S105:
s101, acquiring first state data of a conventional direct current transformer and second state data of a flexible direct current transformer;
s102, judging a first gear state of the conventional direct current transformer according to the first state data and a preset first judgment condition;
s103, judging a second gear state of the flexible direct current transformer according to the second state data and a preset second judgment condition;
s104, judging the overall gear state of the hybrid direct current transformer according to the first gear state and the second gear state;
and S105, controlling the operation of the hybrid direct-current power transmission system according to the overall gear state.
Specifically, step S101 specifically includes:
acquiring relevant state data of a conventional direct current transformer, recording the state data as a first state number, and comprising the following steps of: whether a hardware fault occurs in a conventional direct current transformer, whether a tap joint of the conventional direct current transformer is in local control, whether a position number of the tap joint of the conventional direct current transformer is changed, whether an indication position of the tap joint of the conventional direct current transformer is an invalid position, whether a decoding fault occurs in conventional direct current BCD decoding, whether a power supply fault occurs in conventional direct current, whether a converter transformer unlocking prohibition signal occurs in the conventional direct current, and whether a tap regulation prohibition signal is sent by the conventional direct current alternating current station control; specifically, the method comprises the following steps: the HVDC converter station can complete in-situ control at a bipolar level and a polar level; power failures include ac power failures and control voltage failures in particular.
Acquiring relevant state data of the flexible direct current transformer, recording the state data as a second state number, and comprising the following steps: whether a hardware fault occurs in the flexible direct current transformer, whether a tap joint of the flexible direct current transformer is in local control, whether a position number of the tap joint of the flexible direct current transformer is changed, whether an indication position of the tap joint of the flexible direct current transformer is an invalid position, whether decoding fault occurs in flexible direct current BCD decoding, whether power failure occurs in flexible direct current, whether a converter transformer unlocking prohibition signal occurs in the flexible direct current, and whether a flexible direct current alternating current station control sends a tap regulation prohibition signal; specifically, the method comprises the following steps: the HVDC converter station can complete in-situ control at a bipolar level and a polar level; power failures include ac power failures and control voltage failures in particular.
It should be noted that the first state data and the second state data collected in the present embodiment are a preferred embodiment.
All relevant state parameters of the conventional direct current and the flexible direct current for state judgment are obtained for accurately dividing and judging the gear states of the conventional direct current transformer and the flexible direct current transformer.
Specifically, steps S102 and S103 specifically include:
when the first state data is identified to meet the first judgment condition, judging that the first gear state is a normal state;
when the first state data is identified not to meet the first judgment condition, judging that the first gear state is a fault state;
when the second state data is identified to meet the normal condition in the second judgment condition, judging that the second gear state is a normal state;
when the second state data is identified to meet the abnormal condition in the second judgment condition, judging that the second gear state is an abnormal state;
when the second state data is identified to meet the fault condition in the second judgment condition, judging that the second gear state is a fault state;
when the embodiment is specifically executed, whether the first state data of the conventional direct current transformer meets all first judgment conditions, namely all conditions of normal conditions of the conventional direct current is judged, when all conditions of the normal conditions of the conventional direct current are met, the first gear state of the conventional direct current transformer is judged to be a normal state, when the conventional direct current transformer does not meet any condition of the normal conditions of the conventional direct current, the first gear state of the conventional direct current transformer is judged to be a fault state, and the judgment of the subsequent conventional direct current conditions is stopped;
judging whether the second state data of the flexible direct current transformer meets all normal conditions in the second judging conditions of the flexible direct current, and judging that the second gear state of the flexible direct current transformer is a normal state when all the normal conditions are met;
when the second state data of the flexible direct current transformer meets any one condition of the abnormal conditions, judging that the second gear state of the flexible direct current transformer is in an abnormal state;
when the second state data of the flexible direct current transformer does not meet any flexible direct current abnormal condition, judging whether the second state data of the flexible direct current transformer meets the fault condition of a second judgment condition or not, and when the state of the flexible direct current transformer meets any condition of the fault condition, judging that the second gear state of the flexible direct current transformer is a fault state;
wherein the first judgment condition includes: the conventional direct-current transformer has no hardware fault, the tap joint of the conventional direct-current transformer is not controlled in place, the tap joint of the conventional direct-current transformer does not actually change a position number, the indicated position of the tap joint of the conventional direct-current transformer is not an invalid position, the conventional direct current has no BCD decoding fault, the conventional direct current has no power supply fault, and the conventional direct-current non-converter transformer prohibits an unlocking signal and a tap regulation prohibiting signal sent by the conventional direct current non-alternating current station;
the normal conditions include: the flexible direct current transformer has no hardware fault, the tap joint of the flexible direct current transformer is not controlled in situ, the tap joint of the flexible direct current transformer has no actual change position number, the indicated position of the tap joint of the flexible direct current transformer is not an invalid position, the flexible direct current transformer has no power failure and the flexible direct current converter transformer has no unlocking forbidding signal;
the exception condition includes: the flexible direct current transformer tap is controlled in situ, the position number of the flexible direct current transformer tap is actually changed, the invalid position of the flexible direct current transformer tap is indicated, and the flexible direct current BCD decoding fault or the flexible direct current power supply fault occurs;
the fault conditions include: and the flexible direct current transformer hardware fails or the converter transformer of the flexible direct current forbids unlocking signals.
It should be noted that the first determination condition of the normal direct current given in this embodiment is a preferred embodiment of the normal condition of the normal direct current, and it should be clear to those skilled in the art that there may be other embodiments substantially equivalent to the principle of the scheme of the present invention in the principle of the embodiment given in this embodiment, and all of them are within the protection scope of the scheme of the present invention;
it should be noted that the normal condition, the abnormal condition, and the fault condition in the second determination condition of the flexible direct current given in this embodiment are all preferred embodiments, and it should be clear to those skilled in the art that there may be other embodiments substantially equivalent to the principle of the solution given in this embodiment, and all of them are within the protection scope of the solution of the present invention.
The gear states of the conventional direct current transformer are divided into normal states and faults, the gear states of the flexible direct current transformer are divided into normal states, abnormal states and fault states, the gear states of the conventional direct current transformer and the flexible direct current transformer are judged more accurately, and the gear states of the hybrid direct current transformer can be further analyzed through the states of the conventional direct current transformer and the flexible direct current transformer.
Specifically, step S104 specifically includes:
when the first gear state or the second gear state is a fault state, judging that the overall gear state is a fault state;
when the first gear state and the second gear state are both normal states, judging that the overall gear state is a normal state;
and when the first gear state is an abnormal state and the second gear state is a normal state, judging that the overall gear state is an abnormal state.
In specific implementation, the judged first gear state of the conventional direct-current transformer and the judged second gear state of the flexible direct-current transformer are obtained, and when one of the first gear state of the conventional direct-current transformer and the second gear state of the flexible direct-current transformer is a fault state, the whole gear state of the hybrid direct-current transformer is judged to be the fault state;
when the first gear state and the second gear state are not in a fault state, judging whether the first gear state and the second gear state are in a normal state or not, and when the first gear state and the second gear state are in a normal state, judging the whole gear state to be in a normal state;
when the first gear state is a normal state and the second gear state is an abnormal state, judging the whole gear state as an abnormal state;
through setting up the judgement condition of the whole gear state of mixing DC transformer to according to the first gear state of conventional DC transformer and the second gear state of flexible DC transformer that judge, the whole gear state of mixing DC transformer divides more meticulously, and the judgement to mixing DC transformer gear state is more accurate.
Specifically, step S105 specifically includes:
when the overall gear state is a normal state, controlling the running state of the hybrid direct-current power transmission system to be unchanged, wherein the hybrid direct-current power transmission system can normally unlock, lock and keep running states;
when the overall gear state is an abnormal state, controlling the hybrid direct-current power transmission system to be in a locked running state or a running state, and not allowing the hybrid direct-current power transmission system to run in an unlocked state;
and when the integral gear state is a fault state, controlling the hybrid direct-current power transmission system to run in a locking mode.
In specific implementation, when the overall gear state of the hybrid direct-current transformer is a normal state, the running state of the hybrid direct-current transmission system is kept unchanged, and the hybrid direct-current transmission system can run in an unlocked state, run in a locked state and keep in a running state in the running process;
when the overall gear state of the hybrid direct-current transformer is an abnormal state, controlling the hybrid direct-current power transmission system to be in a locked running state or a running state, and controlling the hybrid direct-current power transmission system not to be unlocked; specifically, when the overall gear state of the hybrid direct-current transformer is an abnormal state, if the hybrid direct-current transmission system is in an unlocked state, the operation state of the hybrid direct-current transmission system is switched to a kept operation state or a locked state, and when the overall gear state of the hybrid direct-current transformer is an abnormal state, if the hybrid direct-current transmission system is not in an unlocked state, the operation state of the hybrid direct-current transmission system is unchanged;
and when the overall gear state of the hybrid direct-current transformer is an abnormal state, switching the operation state of the hybrid direct-current transmission system into a locked state, and stopping the operation of the transmission system.
And controlling the running state of the hybrid direct-current transmission system according to the judged overall gear state of the three hybrid direct-current transformers, and reducing unnecessary shutdown of the transmission system only when the overall gear state of the hybrid direct-current transformer is judged to be a fault.
According to the method for judging and controlling the fault of the hybrid direct-current transmission system, the state data of the conventional direct-current transformer and the state data of the flexible direct-current transformer are obtained, the judging conditions of the state of the hybrid direct-current transformer are set to judge the gear states of the conventional direct-current transformer and the flexible direct-current transformer, the gear state of the hybrid direct-current transformer is judged according to the judged gear state of the conventional direct-current transformer and the judged gear state of the flexible direct-current transformer, the running state of the hybrid direct-current transmission system is controlled according to the gear state of the hybrid direct-current transformer, gear division of the hybrid direct-current transformer is more accurate and fine, the transmission system is required to be stopped when the gear state of the hybrid direct-current transformer is judged to be the fault, and unnecessary stop of the transmission system can be reduced.
Fig. 2 is a schematic structural diagram of a device for determining and controlling a fault of a hybrid dc power transmission system according to another embodiment of the present invention. The device comprises: the device comprises a state data acquisition module, a first judgment module, a second judgment module, an integral judgment module and a control module;
the state data acquisition module is used for acquiring first state data of the conventional direct current transformer and second state data of the flexible direct current transformer;
the first judgment module is used for judging the gear state of the conventional direct-current transformer according to a preset first judgment condition;
the second judging module is used for judging the gear state of the flexible direct current transformer according to a preset second judging condition;
the integral judgment module is used for judging the integral gear state of the hybrid direct-current transformer according to the first gear state and the second gear state;
and the control module is used for controlling the operation of the hybrid direct-current power transmission system according to the whole gear state.
As a preferable mode, the first judging module includes a first normal judging unit and a first failure judging unit:
the second judgment module comprises a second normal judgment unit, a second abnormal judgment unit and a second fault judgment unit;
the first normal judging unit is used for judging that the first gear state is a normal state when the first state data is identified to meet the first judging condition;
the first fault judging unit is used for judging that the first gear state is a fault state when the first state data is identified not to meet the first judging condition;
the second normal judging unit is used for judging that the second gear state is a normal state when the second state data is identified to meet the normal condition in the second judging condition;
the second abnormality judgment unit is used for judging that the second gear state is an abnormal state when the second state data is identified to meet the abnormal condition in the second judgment condition;
the second fault judging unit is used for judging that the second gear state is a fault state when the second state data is identified to meet the fault condition in the second judging condition;
wherein the first judgment condition includes: the conventional direct current transformer has no hardware fault, the tap joint of the conventional direct current transformer is not controlled in situ, the tap joint of the conventional direct current transformer does not actually change the position number, the indicated position of the tap joint of the conventional direct current transformer is not an invalid position, the conventional direct current has no BCD decoding fault, the conventional direct current has no power supply fault, and the conventional direct current does not have an unlocking prohibition signal of the converter transformer and a tap regulation prohibition signal sent by the conventional direct current without alternating current station control;
the normal conditions include: the flexible direct current transformer has no hardware fault, the tap joint of the flexible direct current transformer is not controlled in situ, the tap joint of the flexible direct current transformer has no actual change position number, the indicated position of the tap joint of the flexible direct current transformer is not an invalid position, the flexible direct current transformer has no power failure and the flexible direct current converter transformer has no unlocking forbidding signal;
the exception condition includes: the flexible direct current transformer tap is controlled on site, the position number of the flexible direct current transformer tap is actually changed, the flexible direct current transformer tap indicates an invalid position, and the flexible direct current BCD decoding fault or the flexible direct current power supply fault occurs;
the fault conditions include: and the flexible direct current transformer hardware fails or the converter transformer of the flexible direct current forbids unlocking signals.
As another preferable mode, the whole judgment module includes a first whole judgment unit, a second whole judgment unit and a third whole judgment unit;
the control module comprises a first control module, a second control module and a third control module;
the first integral judgment unit is used for judging that the integral gear state is a fault state when the first gear state or the second gear state is the fault state;
the second integral judgment unit is used for judging that the integral gear state is a normal state when the first gear state and the second gear state are both normal states;
the third integral judgment unit is used for judging that the integral gear state is an abnormal state when the first gear state is an abnormal state and the second gear state is a normal state;
the first control unit is used for controlling the running state of the hybrid direct-current power transmission system to be unchanged when the overall gear state is a normal state, and the hybrid direct-current power transmission system can normally unlock, lock and keep running states;
the second control unit is used for controlling the hybrid direct-current power transmission system to be in a locked running state or a running state when the overall gear state is in an abnormal state, and not allowing the hybrid direct-current power transmission system to run in an unlocked state;
and the third control unit is used for controlling the hybrid direct-current power transmission system to run in a locking mode when the overall gear state is a fault state.
And the control module is used for controlling the operation of the hybrid direct-current power transmission system according to the gear state of the hybrid direct-current transformer.
In specific implementation, the device for determining and controlling a fault of a hybrid direct-current power transmission system can complete specific functions of the method for determining and controlling a fault of a hybrid direct-current power transmission system provided in any one of the embodiments, and a specific implementation process is specifically described in any one of the embodiments of the method for determining and controlling a fault of a hybrid direct-current power transmission system, which is not described in detail in this embodiment.
Referring to fig. 3, a schematic structural diagram of an apparatus for determining and controlling a hybrid dc power transmission system fault according to still another embodiment of the present invention is provided, where the apparatus includes a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, and when the processor executes the computer program, the processor implements the method for determining and controlling the hybrid dc power transmission system fault according to any of the embodiments described above.
The device for judging and controlling the fault of the hybrid direct-current power transmission system can be a desktop computer, a notebook computer, a palm computer, a cloud server and other computing equipment. The device for judging and controlling the hybrid direct current power transmission system fault can include, but is not limited to, a processor and a memory.
The Processor may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component, or the like. The general-purpose processor may be a microprocessor, or the processor may be any conventional processor, and the processor is a control center of the apparatus for determining and controlling the hybrid dc power transmission system fault, and various interfaces and lines are used to connect various parts of the apparatus for determining and controlling the whole hybrid dc power transmission system fault.
The memory can be used for storing the computer program and/or the module, and the processor can realize various functions of the device/terminal equipment for judging and controlling the hybrid direct current power transmission system fault by running or executing the computer program and/or the module stored in the memory and calling the data stored in the memory. The memory may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. In addition, the memory may include high speed random access memory, and may also include non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), at least one magnetic disk storage device, a Flash memory device, or other volatile solid state storage device.
The embodiment of the present invention further provides a computer-readable storage medium, where the computer-readable storage medium includes a stored computer program, and when the computer program runs, a device where the computer-readable storage medium is located is controlled to execute the method for determining and controlling the fault of the hybrid direct current power transmission system according to any one of the above embodiments. The integrated module of the device for judging and controlling the fault of the hybrid direct current transmission system can be stored in a computer readable storage medium if the integrated module is realized in the form of a software functional unit and is sold or used as an independent product. Based on such understanding, all or part of the flow of the method for determining and controlling the fault of the hybrid dc power transmission system according to the present invention may also be implemented by instructing related hardware through a computer program, which may be stored in a computer-readable storage medium, and when the computer program is executed by a processor, the steps of the method embodiments may be implemented. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like. It should be noted that the computer readable medium may contain content that is subject to appropriate increase or decrease as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media does not include electrical carrier signals and telecommunications signals as is required by legislation and patent practice.
It should be noted that the above-described embodiments of the apparatus are merely illustrative, where the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. In addition, in the drawings of the embodiment of the apparatus provided by the present invention, the connection relationship between the modules indicates that there is a communication connection therebetween, and may be specifically implemented as one or more communication buses or signal lines. One of ordinary skill in the art can understand and implement it without inventive effort. While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
According to the method, the device and the medium for judging and controlling the faults of the hybrid direct-current transmission system, the state data of the conventional direct-current transformer and the state data of the flexible direct-current transformer are obtained, the judging conditions of the state of the hybrid direct-current transformer are set to judge the gear states of the conventional direct-current transformer and the flexible direct-current transformer, the gear state of the hybrid direct-current transformer is judged according to the judged gear state of the conventional direct-current transformer and the judged gear state of the flexible direct-current transformer, the running state of the hybrid direct-current transmission system is controlled according to the gear state of the hybrid direct-current transformer, gear division of the hybrid direct-current transformer is more accurate and fine, the transmission system is required to be stopped only when the gear state of the hybrid direct-current transformer is judged to be the faults, and unnecessary stop of the transmission system can be reduced.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (9)
1. A method for judging and controlling faults of a hybrid direct current transmission system is characterized by comprising the following steps:
acquiring first state data of a conventional direct current transformer and second state data of a flexible direct current transformer;
judging a first gear state of the conventional direct current transformer according to the first state data and a preset first judgment condition;
judging a second gear state of the flexible direct current transformer according to the second state data and a preset second judgment condition;
judging the overall gear state of the hybrid direct-current transformer according to the first gear state and the second gear state;
controlling the operation of the hybrid direct-current power transmission system according to the overall gear state;
the determining the first gear state of the conventional dc transformer according to the first state data and a preset first determination condition specifically includes:
when the first state data are identified to meet all the first judgment conditions, judging that the first gear state is a normal state;
when the first state data are identified not to meet all the first judgment conditions, judging that the first gear state is a fault state;
the determining a second gear state of the flexible dc transformer according to the second state data and a preset second determination condition specifically includes:
when the second state data are identified to meet all normal conditions in the second judgment condition, judging that the second gear state is a normal state;
when the second state data is identified to meet any abnormal condition in the second judgment conditions, judging that the second gear state is an abnormal state;
when the second state data is identified to meet any fault condition in the second judgment conditions, judging that the second gear state is a fault state;
the method for judging the overall gear state of the hybrid direct-current transformer according to the first gear state and the second gear state specifically comprises the following steps:
when the first gear state or the second gear state is a fault state, judging that the overall gear state is a fault state;
when the first gear state and the second gear state are both normal states, judging that the overall gear state is a normal state;
and when the first gear state is an abnormal state and the second gear state is a normal state, judging that the overall gear state is an abnormal state.
2. The method of hybrid direct current power transmission system fault determination and control of claim 1, wherein the first determination condition comprises: the conventional direct current transformer has no hardware fault, the tap joint of the conventional direct current transformer is not controlled in situ, the tap joint of the conventional direct current transformer does not actually change the position number, the indicated position of the tap joint of the conventional direct current transformer is not an invalid position, the conventional direct current transformer has no BCD decoding fault, the conventional direct current transformer has no power supply fault, and the conventional direct current transformer has no unlocking prohibition signal and the conventional direct current transformer has no tap regulation prohibition signal sent by the alternating current station.
3. The method of hybrid direct current transmission system fault determination and control of claim 1,
the normal conditions include: the flexible direct current transformer has no hardware fault, the tap joint of the flexible direct current transformer is not controlled in place, the tap joint of the flexible direct current transformer does not actually change the position number, the indicated position of the tap joint of the flexible direct current transformer is not an invalid position, the flexible direct current transformer has no power failure, and the flexible direct current converter transformer has no unlocking forbidding signal;
the exception condition includes: the flexible direct current transformer tap is controlled in situ, the position number of the flexible direct current transformer tap is actually changed, the invalid position of the flexible direct current transformer tap is indicated, and the flexible direct current BCD decoding fault or the flexible direct current power supply fault occurs;
the fault conditions include: and the flexible direct current transformer hardware fails or the converter transformer of the flexible direct current forbids unlocking signals.
4. The method for determining and controlling the fault of the hybrid direct current transmission system according to claim 1, wherein the controlling the operation of the hybrid direct current transmission system according to the overall gear state specifically comprises:
when the overall gear state is a normal state, controlling the running state of the hybrid direct-current power transmission system to be unchanged, wherein the hybrid direct-current power transmission system can normally unlock, lock and run and keep the running state;
when the overall gear state is an abnormal state, controlling the hybrid direct-current power transmission system to be in a locked running state or a running state, and not allowing the hybrid direct-current power transmission system to run in an unlocked state;
and when the integral gear state is a fault state, controlling the hybrid direct-current power transmission system to run in a locking mode.
5. Device for the fault determination and control of a hybrid direct current transmission system, characterized in that the device comprises: the device comprises a state data acquisition module, a first judgment module, a second judgment module, an integral judgment module and a control module;
the state data acquisition module is used for acquiring first state data of the conventional direct current transformer and second state data of the flexible direct current transformer;
the first judgment module is used for judging a first gear state of the conventional direct current transformer according to a preset first judgment condition;
the second judging module is used for judging a second gear state of the flexible direct current transformer according to a preset second judging condition;
the integral judgment module is used for judging the integral gear state of the hybrid direct-current transformer according to the first gear state and the second gear state;
the control module is used for controlling the operation of the hybrid direct-current power transmission system according to the whole gear state;
the first judging module comprises a first normal judging unit and a first fault judging unit:
the second judgment module comprises a second normal judgment unit, a second abnormal judgment unit and a second fault judgment unit;
the first normal judgment unit is used for judging that the first gear state is a normal state when all the first state data are identified to meet the first judgment condition;
the first fault judging unit is used for judging that the first gear state is a fault state when all the first state data are identified to not meet the first judging condition;
the second normal judgment unit is used for judging that the second gear state is a normal state when the second state data is identified to meet all normal conditions in the second judgment condition;
the second abnormality judgment unit is configured to judge that the second gear state is an abnormal state when it is recognized that the second state data satisfies any one of the second judgment conditions;
the second fault judging unit is used for judging that the second gear state is a fault state when the second state data is identified to meet any fault condition in the second judging conditions;
the integral judgment module comprises a first integral judgment unit, a second integral judgment unit and a third integral judgment unit;
the first integral judgment unit is used for judging that the integral gear state is a fault state when the first gear state or the second gear state is the fault state;
the second integral judgment unit is used for judging that the integral gear state is a normal state when the first gear state and the second gear state are both normal states;
the third integral judgment unit is used for judging that the integral gear state is an abnormal state when the first gear state is an abnormal state and the second gear state is a normal state.
6. The apparatus according to claim 5, wherein the first determination condition comprises: the conventional direct current transformer has no hardware fault, the tap joint of the conventional direct current transformer is not controlled in situ, the tap joint of the conventional direct current transformer does not actually change the position number, the indicated position of the tap joint of the conventional direct current transformer is not an invalid position, the conventional direct current has no BCD decoding fault, the conventional direct current has no power supply fault, and the conventional direct current does not have an unlocking prohibition signal of the converter transformer and a tap regulation prohibition signal sent by the conventional direct current without alternating current station control;
the normal conditions include: the flexible direct current transformer has no hardware fault, the tap joint of the flexible direct current transformer is not controlled in situ, the tap joint of the flexible direct current transformer has no actual change position number, the indicated position of the tap joint of the flexible direct current transformer is not an invalid position, the flexible direct current transformer has no power failure and the flexible direct current converter transformer has no unlocking forbidding signal;
the exception condition includes: the flexible direct current transformer tap is controlled in situ, the position number of the flexible direct current transformer tap is actually changed, the invalid position of the flexible direct current transformer tap is indicated, and the flexible direct current BCD decoding fault or the flexible direct current power supply fault occurs;
the fault conditions include: and the flexible direct current transformer hardware fails or the converter transformer of the flexible direct current forbids unlocking signals.
7. The apparatus for fault diagnosis and control of a hybrid direct current transmission system according to claim 5, wherein the control modules comprise a first control module, a second control module and a third control module;
the first control module is used for controlling the running state of the hybrid direct-current power transmission system to be unchanged when the overall gear state is a normal state, and the hybrid direct-current power transmission system can normally unlock, lock and run and keep a running state;
the second control module is used for controlling the hybrid direct-current power transmission system to be in a locked running state or a running state when the overall gear state is in an abnormal state, and the hybrid direct-current power transmission system is not allowed to run in an unlocked state;
and the third control module is used for controlling the hybrid direct-current power transmission system to run in a locking mode when the overall gear state is a fault state.
8. An apparatus for determining and controlling a fault in a hybrid dc power transmission system, comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor when executing the program performs the steps of the method for determining and controlling a fault in a hybrid dc power transmission system according to any one of claims 1 to 4.
9. A computer-readable storage medium, on which a computer program is stored, which program, when being executed by a processor, is adapted to carry out the steps of the method for determining and controlling a fault in a hybrid direct current power transmission system according to any one of claims 1 to 4.
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| CN106324409A (en) * | 2016-11-28 | 2017-01-11 | 国网山东省电力公司济宁供电公司 | Transformer tap online display device and transformer tap online display system |
| CN107732952A (en) * | 2017-10-16 | 2018-02-23 | 南方电网科学研究院有限责任公司 | The failure response analysis method and system of multiterminal Hybrid HVDC system |
| CN207304005U (en) * | 2017-10-18 | 2018-05-01 | 南方电网科学研究院有限责任公司 | A kind of mixed DC fault response characteristics simulation system |
| CN107834523B (en) * | 2017-10-30 | 2019-11-12 | 国网浙江省电力有限公司 | Extra-high voltage direct-current fault diagnosis system and working method based on model and rule base |
| CN112086935B (en) * | 2020-08-20 | 2022-09-20 | 许继电气股份有限公司 | Converter transformer differential protection control method and device capable of achieving adaptive voltage reduction operation |
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