CN116449146A - Power system transmission line fault online analysis method - Google Patents
Power system transmission line fault online analysis method Download PDFInfo
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- CN116449146A CN116449146A CN202310261580.9A CN202310261580A CN116449146A CN 116449146 A CN116449146 A CN 116449146A CN 202310261580 A CN202310261580 A CN 202310261580A CN 116449146 A CN116449146 A CN 116449146A
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 135
- 238000004458 analytical method Methods 0.000 title claims abstract description 71
- 238000012545 processing Methods 0.000 claims abstract description 65
- 238000000034 method Methods 0.000 claims abstract description 25
- 238000007405 data analysis Methods 0.000 claims abstract description 7
- 238000012544 monitoring process Methods 0.000 claims description 33
- 230000016507 interphase Effects 0.000 claims description 18
- 238000011835 investigation Methods 0.000 claims description 18
- 230000011664 signaling Effects 0.000 claims description 8
- 238000004451 qualitative analysis Methods 0.000 claims description 3
- 238000012795 verification Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 238000007781 pre-processing Methods 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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Classifications
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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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- 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
- G01R31/088—Aspects of digital computing
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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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
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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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/54—Testing for continuity
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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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/58—Testing of lines, cables or conductors
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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)
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- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention discloses an online analysis method for faults of a power transmission line of a power system, which belongs to the field of power systems and comprises the following analysis steps: data acquisition, location identification, fault classification, data analysis, processing and storage, manual processing and data warehousing. After the fault information of the power transmission line is collected through the processing analysis terminal, the line in the power transmission line, which is possibly caused by the fault of the tripping operation of the switch due to the misjudgment of the relay, is subjected to power transmission processing when the power transmission line can carry out forced power transmission once, fault judgment and preprocessing are carried out, the incomplete line faults are processed, voltage and current characteristic data records of the incomplete line faults are sent to the manual dispatching platform, the effect that the processing analysis terminal can process fault data by itself in time is achieved, the fault type of the waveform is named, fault voltage and current data which accords with the characteristics of the waveform cannot be subjected to self-repairing fault definition, and the field fault checking range is more accurate.
Description
Technical Field
The invention relates to the technical field of power systems, in particular to an online analysis method for faults of a power transmission line of a power system.
Background
With the continuous development of the third technological revolution, the electric power demand is continuously expanding in the aspect of life, the electric power operation mode of the electric power system in China is usually unattended, after the power transmission line fails, the failure cause needs to be analyzed as soon as possible, and when on-site failure analysis and treatment are needed, operation and maintenance personnel are dispatched to conduct on-site investigation.
At present, when a transmission line of a power system fails, circuit remote signaling data after the failure is stored in real time, a professional is waited to call and analyze the type of the failure, the failure occurrence place is positioned, a rough failure result is obtained, operation and maintenance personnel are arranged to conduct field investigation, the failure result is accurately determined, and the data is stored first and then subjected to failure analysis processing when the transmission line fails each time in such a processing mode, so that the analysis is far later than the data storage, and the failure analysis efficiency of the transmission line is reduced.
Therefore, we propose an online analysis method for the faults of the transmission line of the power system.
Disclosure of Invention
The invention aims to solve the problems that in the prior art, when a power transmission line of a power system fails, the analysis process is too delayed and the power transmission line failure analysis efficiency is reduced only by calling and analyzing by a professional, and provides an online power transmission line failure analysis method of the power system.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
an online analysis method for power transmission line faults of a power system comprises the following analysis steps:
s1: the method comprises the steps of data acquisition, recording voltage and current information of each transformer substation in a power transmission line through a monitoring power grid, storing the information in an internal memory of each transformer substation, and acquiring information by remote signaling between each node at a power monitoring network point when terminal power transmission faults occur;
s2: the method comprises the steps of identifying a place, namely, when a fault occurs, primarily comparing voltage and current information of a transmission line between all substations, and identifying the place where the fault occurs;
s3: fault classification, namely comparing and judging the monitoring data of the fault place, and classifying the fault types of the power transmission line at the fault place;
s4: the data analysis is carried out on a circuit of which the power transmission line is broken down due to the tripping of the switch, the circuit is judged to be a feed line or a system interconnecting line and a ring network line, and after the judgment of the tripping circuit of the switch due to the fault of the power transmission line is confirmed, whether the circuit is a switch in a live working line and a low-cycle load shedding device is judged;
s4: processing and storing, after data analysis, processing a judging result, and sending a personnel scheduling command to a personnel scheduling platform when line faults are not solved, and waiting for manual field investigation;
s5: manually processing, after a processing analysis terminal does not solve the problem of dispatching a command of personnel, recording the waveform characteristics of the transmission line fault at the moment by a professional, comparing the waveform characteristics with the waveform of the past transmission line, and carrying out fault investigation on the past site;
s6: and (3) warehousing data, after field investigation by professional personnel, carrying out qualitative analysis on the fault, naming the fault according to the characteristics of the waveform of the fault of the power transmission line, and storing the analysis result into a processing analysis terminal.
Preferably, in step S1, each substation is set as a line monitoring node, and the voltage and current waveforms are recorded by the fault recorder, so as to monitor the line transmission condition at the monitoring node in real time, and when the terminal transmission fails, that is, when the terminal transmission cannot stably supply power to the user terminal, the transmission line is determined to fail.
Preferably, in step S2, the power monitoring network transmits the voltage and current information acquired by remote signaling to the fault identification terminal, and positions the fault line when the voltage and current information change of adjacent substations is determined to be maximum by comparing the voltage and current changes between the substations.
Preferably, in step S2, the comparison process is determined by making a difference between the waveforms of the current and the voltage in the unit time from the effective values of the current and the voltage before the fault between the adjacent line monitoring nodes and the single line monitoring node, and when the difference changes, the place where the fault line occurs is between the substations represented by the two adjacent line monitoring nodes that make the difference.
Preferably, in step S3, the transmission line fault is divided into a circuit break fault and a short circuit fault, the short circuit fault is divided into a ground fault and an interphase short circuit, the ground fault is divided into a single-phase ground fault and a double-phase ground fault, and the interphase short circuit is divided into a double-phase interphase short circuit and a three-phase interphase short circuit.
Preferably, in step S3, when the determined faults of the various power transmission lines occur, the following features exist:
when the power transmission line has an open-circuit fault, the single-phase or multi-phase power transmission line between adjacent line monitoring nodes can only detect voltage, and no current flows;
when a single-phase earth fault occurs to the power transmission line, the power transmission line fault recorder monitors zero sequence voltage and zero sequence current, and simultaneously the voltage of the fault line drops and the voltage of the non-fault line rises;
when a double-phase earth fault occurs to the power transmission line, the fault recorder of the power transmission line monitors zero sequence voltage and zero sequence current, meanwhile, fault phase current is increased, voltage is reduced, and phases among fault phases are in phase;
when the transmission line is in double-phase interphase short circuit, no zero sequence voltage and zero sequence current are generated in the transmission line, fault double-phase current is increased, voltage is reduced, and phases between the fault double-phase are reversed;
when the three-phase interphase short circuit occurs in the power transmission line, no zero sequence voltage and zero sequence current are generated in the power transmission line, the fault three-phase current is increased, and the voltage is reduced.
Preferably, in step S5, after the fault classification, the specific processing manner of the switch tripping determination result caused by the power transmission line fault is as follows:
when the switch in the live working line and the low-cycle load shedding device is judged to be tripped, a personnel scheduling command is sent to a personnel scheduling platform to wait for on-site investigation;
when the tripping is judged to be performed in the non-live working circuit and the low-cycle load shedding device and is performed in the feeding circuit, the reclosing is not thrown or does not act, the direct forced power transmission can be performed once beyond manual processing, and the forced power transmission command and the forced data are acquired to a processing analysis terminal;
when the system interconnection line and the ring network line are judged, the line voltage is monitored, when the voltage is monitored, the voltage and current conditions of other parallel transmission lines are checked, and the check result is sent to a processing analysis terminal, when the transmission line is not at voltage, a no-voltage verification mode is put on a reclosing device, when the reclosing device does not act or a switch is refused after the reclosing device acts, power is transmitted once, and a forced transmission command and forced transmitted data are acquired to the processing analysis terminal, and the processing steps are stored through the processing analysis terminal.
Preferably, in step S5, the transmission line fault that cannot be resolved by the processing analysis terminal is characterized by the amplitude, frequency, speed, wavelength, phase and harmonic components of the waveform recorded for the fault display waveform.
Preferably, in step S6, after the fault is named after the manual processing, when the processing analysis terminal processes the data again and fails to process the power transmission line fault after analysis, the fault waveform conforming to the recorded waveform characteristic is named, and an analysis reference is provided for the professional.
Compared with the prior art, the invention has the beneficial effects that:
1. after the fault information of the power transmission line is collected through the processing analysis terminal, the line which possibly causes the tripping of a switch to generate faults due to the misjudgment of a relay in the power transmission line is subjected to investigation through the self-pre-judging processing, and the power transmission is performed once when the power transmission line can perform self-forced power transmission once, so that the fault judgment and pre-processing of the information among all the line monitoring nodes are remotely measured, the fault is processed, the voltage and current characteristic data record is sent to the manual dispatching platform, the effect that the processing analysis terminal can process the fault data automatically and timely is achieved, and the problem that in the prior art mentioned in the background art, when the power transmission line of the power system generates the fault of the power transmission line, the analysis process is too lagged and the fault analysis efficiency of the power transmission line is reduced only through the calling analysis of professionals is solved.
2. After the self-judging processing of the processing analysis terminal is carried out, the data characteristics of the unresolved faults are sent to the manual platform, the failure type of the waveform is named after the judgment and the field investigation are carried out by a professional, so that when the next processing analysis terminal can not solve the line failure, the failure voltage and current data which accords with the characteristics of the waveform are subjected to self-repairing failure definition, and the type of the failure voltage can be known before the professional goes to the field investigation, so that the field investigation failure range is more accurate.
Drawings
Fig. 1 is a schematic structural diagram of an online analysis method for faults of a power transmission line of a power system.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments, and all other embodiments obtained by those skilled in the art without making creative efforts based on the embodiments of the present invention are included in the protection scope of the present invention.
Referring to fig. 1, an online analysis method for faults of a power transmission line of a power system includes the following analysis steps:
s1: the method comprises the steps of data acquisition, recording voltage and current information of each transformer substation in a power transmission line through a monitoring power grid, storing the information in an internal memory of each transformer substation, and acquiring information by remote signaling between each node at a power monitoring network point when terminal power transmission faults occur;
through the technical scheme, in step S1, each transformer substation is set as a line monitoring node, voltage and current waveforms are recorded through a fault recorder, line transmission conditions at the monitoring node are monitored in real time, when terminal transmission fails, namely, when the terminal transmission cannot stably supply power to a user terminal, the transmission line is judged to fail, and remote signaling, remote measurement and remote control are carried out by matching with a processing analysis terminal.
S2: the method comprises the steps of identifying a place, namely, when a fault occurs, primarily comparing voltage and current information of a transmission line between all substations, and identifying the place where the fault occurs;
according to the technical scheme, in the step S2, the power monitoring network transmits voltage and current information acquired by remote signaling to the fault identification terminal, and when the voltage and current information change of adjacent substations is judged to be maximum by comparing the voltage and current change between the substations, the fault line occurrence place is positioned;
based on the above, in step S2, the comparison process is determined by making a difference between the waveforms of the current and the voltage in the unit time from the effective values of the current and the voltage before the fault between the adjacent line monitoring nodes and the single line monitoring node, and when the difference changes, the place where the fault line occurs between the substations represented by the two adjacent line monitoring nodes that make the difference at this time.
S3: fault classification, namely comparing and judging the monitoring data of the fault place, and classifying the fault types of the power transmission line at the fault place;
through the above technical scheme, in step S3, the power transmission line fault is divided into a circuit breaking fault and a short circuit fault, the short circuit fault is divided into a ground fault and an inter-phase short circuit, the ground fault is divided into a single-phase ground fault and a double-phase ground fault, and the inter-phase short circuit is divided into a double-phase inter-phase short circuit and a three-phase inter-phase short circuit;
based on the above, in step S3, when various power transmission line faults are determined to be faulty, the following features exist:
when the power transmission line has an open-circuit fault, the single-phase or multi-phase power transmission line between adjacent line monitoring nodes can only detect voltage, and no current flows;
when a single-phase earth fault occurs to the power transmission line, the power transmission line fault recorder monitors zero sequence voltage and zero sequence current, and simultaneously the voltage of the fault line drops and the voltage of the non-fault line rises;
when a double-phase earth fault occurs to the power transmission line, the fault recorder of the power transmission line monitors zero sequence voltage and zero sequence current, meanwhile, fault phase current is increased, voltage is reduced, and phases among fault phases are in phase;
when the transmission line is in double-phase interphase short circuit, no zero sequence voltage and zero sequence current are generated in the transmission line, fault double-phase current is increased, voltage is reduced, and phases between the fault double-phase are reversed;
when the three-phase interphase short circuit occurs in the power transmission line, no zero sequence voltage and zero sequence current are generated in the power transmission line, the fault three-phase current is increased, and the voltage is reduced.
S4: the data analysis is carried out on a circuit of which the power transmission line is broken down due to the tripping of the switch, the circuit is judged to be a feed line or a system interconnecting line and a ring network line, and after the judgment of the tripping circuit of the switch due to the fault of the power transmission line is confirmed, whether the circuit is a switch in a live working line and a low-cycle load shedding device is judged;
s4: processing and storing, after data analysis, processing a judging result, and sending a personnel scheduling command to a personnel scheduling platform when line faults are not solved, and waiting for manual field investigation;
s5: manually processing, after a processing analysis terminal does not solve the problem of dispatching a command of personnel, recording the waveform characteristics of the transmission line fault at the moment by a professional, comparing the waveform characteristics with the waveform of the past transmission line, and carrying out fault investigation on the past site;
through the above technical solution, in step S5, after fault classification, a specific processing manner of the switch tripping determination result caused by the power transmission line fault is as follows:
when the switch in the live working line and the low-cycle load shedding device is judged to be tripped, a personnel scheduling command is sent to a personnel scheduling platform to wait for on-site investigation;
when the tripping is judged to be performed in the non-live working circuit and the low-cycle load shedding device and is performed in the feeding circuit, the reclosing is not thrown or does not act, the direct forced power transmission can be performed once beyond manual processing, and the forced power transmission command and the forced data are acquired to a processing analysis terminal;
when judging a system interconnection line and a ring network line, monitoring line voltage, checking the voltage and current conditions of other parallel transmission lines when the voltage is monitored, sending a checking result to a processing analysis terminal, when the transmission line has no voltage, throwing a no-voltage verification mode for a reclosing device, carrying out forced power transmission once when a reclosing device does not act or a switch is refused after the reclosing device acts, collecting a forced transmission command and forced transmitted data to the processing analysis terminal, and storing the processing steps through the processing analysis terminal;
based on the above, in step S5, the transmission line fault that cannot be resolved by the processing analysis terminal is characterized by the amplitude, frequency, speed, wavelength, phase, and harmonic components of the waveform recorded for the fault display waveform.
S6 the method comprises the following steps: and (3) warehousing data, after field investigation by professional personnel, carrying out qualitative analysis on the fault, naming the fault according to the characteristics of the waveform of the fault of the power transmission line, and storing the analysis result into a processing analysis terminal.
According to the technical scheme, in the step S6, after manual processing, the fault is named, when the processing analysis terminal is used for processing the data again and analyzing the fault of the power transmission line, the fault waveform conforming to the recorded waveform characteristics is named, analysis references are provided for professionals, the line fault waveform conforming to the characteristics is divided after manual processing, the next time the processing analysis terminal is used for providing the fault on-line analysis type for operation staff when the forced sending point processing is not performed, and the purposes of timely processing and analyzing the fault of the power transmission line when the processing analysis terminal fails are achieved, so that the efficiency of analyzing the fault of the power transmission line is improved.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (9)
1. The online analysis method for the power transmission line faults of the power system is characterized by comprising the following analysis steps of:
s1: the method comprises the steps of data acquisition, recording voltage and current information of each transformer substation in a power transmission line through a monitoring power grid, storing the information in an internal memory of each transformer substation, and acquiring information by remote signaling between each node at a power monitoring network point when terminal power transmission faults occur;
s2: the method comprises the steps of identifying a place, namely, when a fault occurs, primarily comparing voltage and current information of a transmission line between all substations, and identifying the place where the fault occurs;
s3: fault classification, namely comparing and judging the monitoring data of the fault place, and classifying the fault types of the power transmission line at the fault place;
s4: the data analysis is carried out on a circuit of which the power transmission line is broken down due to the tripping of the switch, the circuit is judged to be a feed line or a system interconnecting line and a ring network line, and after the judgment of the tripping circuit of the switch due to the fault of the power transmission line is confirmed, whether the circuit is a switch in a live working line and a low-cycle load shedding device is judged;
s4: processing and storing, after data analysis, processing a judging result, and sending a personnel scheduling command to a personnel scheduling platform when line faults are not solved, and waiting for manual field investigation;
s5: manually processing, after a processing analysis terminal does not solve the problem of dispatching a command of personnel, recording the waveform characteristics of the transmission line fault at the moment by a professional, comparing the waveform characteristics with the waveform of the past transmission line, and carrying out fault investigation on the past site;
s6: and (3) warehousing data, after field investigation by professional personnel, carrying out qualitative analysis on the fault, naming the fault according to the characteristics of the waveform of the fault of the power transmission line, and storing the analysis result into a processing analysis terminal.
2. The method for on-line analysis of power transmission line faults of a power system according to claim 1, wherein in step S1, each transformer substation is set as a line monitoring node, voltage and current waveforms are recorded through a fault recorder, real-time monitoring is performed on the power transmission condition of the line at the monitoring node, and when the terminal power transmission fails, that is, when the power cannot be stably supplied to a user terminal, the power transmission line is judged to be failed.
3. The method for on-line analysis of faults of a power system according to claim 2, wherein in step S2, the power monitoring network transmits voltage and current information collected by remote signaling to the fault identification terminal, and when the voltage and current information change between adjacent substations is maximum, the fault line occurrence location is determined by comparing the voltage and current change between the substations.
4. A method for on-line analysis of faults in a power transmission line of a power system according to claim 3, wherein in step S2, the comparison process is determined by making a difference between the waveforms of the current and the voltage in a unit time between adjacent line monitoring nodes and between the single line monitoring node, compared with the effective values of the current and the voltage before the fault, and when the difference changes, the place where the fault line occurs is between substations represented by the two adjacent line monitoring nodes that are made the difference.
5. The method according to claim 1, wherein in step S3, the power transmission line fault is divided into a circuit breaking fault and a short circuit fault, the short circuit fault is divided into a ground fault and an inter-phase short circuit, the ground fault is divided into a single-phase ground fault and a double-phase ground fault, and the inter-phase short circuit is divided into a two-phase inter-phase short circuit and a three-phase inter-phase short circuit.
6. The method for online analysis of faults of power transmission lines of a power system according to claim 5, wherein in step S3, when the faults of various power transmission lines after judgment occur, the following features exist:
when the power transmission line has an open-circuit fault, the single-phase or multi-phase power transmission line between adjacent line monitoring nodes can only detect voltage, and no current flows;
when a single-phase earth fault occurs to the power transmission line, the power transmission line fault recorder monitors zero sequence voltage and zero sequence current, and simultaneously the voltage of the fault line drops and the voltage of the non-fault line rises;
when a double-phase earth fault occurs to the power transmission line, the fault recorder of the power transmission line monitors zero sequence voltage and zero sequence current, meanwhile, fault phase current is increased, voltage is reduced, and phases among fault phases are in phase;
when the transmission line is in double-phase interphase short circuit, no zero sequence voltage and zero sequence current are generated in the transmission line, fault double-phase current is increased, voltage is reduced, and phases between the fault double-phase are reversed;
when the three-phase interphase short circuit occurs in the power transmission line, no zero sequence voltage and zero sequence current are generated in the power transmission line, the fault three-phase current is increased, and the voltage is reduced.
7. The method for online analysis of faults of a power transmission line of a power system according to claim 1, wherein in step S5, after the faults are classified, the specific processing manner of the switch tripping judgment result caused by the faults of the power transmission line is as follows:
when the switch in the live working line and the low-cycle load shedding device is judged to be tripped, a personnel scheduling command is sent to a personnel scheduling platform to wait for on-site investigation;
when the tripping is judged to be performed in the non-live working circuit and the low-cycle load shedding device and is performed in the feeding circuit, the reclosing is not thrown or does not act, the direct forced power transmission can be performed once beyond manual processing, and the forced power transmission command and the forced data are acquired to a processing analysis terminal;
when the system interconnection line and the ring network line are judged, the line voltage is monitored, when the voltage is monitored, the voltage and current conditions of other parallel transmission lines are checked, and the check result is sent to a processing analysis terminal, when the transmission line is not at voltage, a no-voltage verification mode is put on a reclosing device, when the reclosing device does not act or a switch is refused after the reclosing device acts, power is transmitted once, and a forced transmission command and forced transmitted data are acquired to the processing analysis terminal, and the processing steps are stored through the processing analysis terminal.
8. The method according to claim 1, wherein in step S5, the transmission line fault that cannot be resolved by the processing analysis terminal is characterized by the amplitude, frequency, speed, wavelength, phase, and harmonic components of the waveform.
9. The method for on-line analysis of power transmission line faults of a power system according to claim 1, wherein in step S6, after the fault is named after manual processing, when the power transmission line fault cannot be processed after the processing analysis terminal processes the data again for analysis, the fault waveform conforming to the recorded waveform characteristic is named, and an analysis reference is provided for professionals.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310261580.9A CN116449146A (en) | 2023-03-17 | 2023-03-17 | Power system transmission line fault online analysis method |
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| CN202310261580.9A CN116449146A (en) | 2023-03-17 | 2023-03-17 | Power system transmission line fault online analysis method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117148204A (en) * | 2023-09-06 | 2023-12-01 | 惠州市盛微电子有限公司 | Voltage calibration system of large energy storage system battery and application method thereof |
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2023
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117148204A (en) * | 2023-09-06 | 2023-12-01 | 惠州市盛微电子有限公司 | Voltage calibration system of large energy storage system battery and application method thereof |
| CN117148204B (en) * | 2023-09-06 | 2024-03-26 | 惠州市盛微电子有限公司 | Safety monitoring system of large energy storage system battery and application method thereof |
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