CN116699294A - Intelligent online safe operation monitoring system for overhead line - Google Patents
Intelligent online safe operation monitoring system for overhead line Download PDFInfo
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- CN116699294A CN116699294A CN202310967121.2A CN202310967121A CN116699294A CN 116699294 A CN116699294 A CN 116699294A CN 202310967121 A CN202310967121 A CN 202310967121A CN 116699294 A CN116699294 A CN 116699294A
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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
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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
- G01R31/58—Testing of lines, cables or conductors
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Abstract
The application discloses an intelligent online safe operation monitoring system for an overhead line, which belongs to the field of electric power and is used for solving the problems that when an electric power line breaks down, the electric power line goes to rush repair and the actual operation condition of the overhead line cannot be accurately monitored by a current online monitoring method.
Description
Technical Field
The application belongs to the field of electric power, relates to fault monitoring technology, and particularly relates to an intelligent online safe operation monitoring system for an overhead line.
Background
The discovery and application of electric power raise the second industrialized climax, electric power is taken as an energy source of power, the electric power is one of three technological revolution in the world, and nowadays more and more systems and intelligent electric power systems greatly change the life of people, and the electric power systems consist of links such as a power generation end, a power transmission end, a power transformation end, a power distribution end, an electric power utilization end and the like, so that overhead lines are indispensable important links of the electric power systems.
When the power line breaks down under most conditions, electricians are assigned to go to rush repair, safety operation early warning monitoring of the overhead line is not achieved, meanwhile, corresponding on-line monitoring methods are set for the overhead line by the current power, but the actual operation condition of the overhead line cannot be accurately monitored by the current on-line monitoring methods;
for this purpose, we propose an intelligent online safe operation monitoring system for overhead lines.
Disclosure of Invention
Aiming at the defects existing in the prior art, the application aims to provide an intelligent online safe operation monitoring system for an overhead line.
The technical problems to be solved by the application are as follows:
how to realize the accurate monitoring of the running condition of the overhead line in an on-line mode.
The aim of the application can be achieved by the following technical scheme:
an intelligent online safe operation monitoring system for overhead lines comprises an operation acquisition module, a line dividing module, an operation analysis module, a management module, a storage module, a history monitoring module, a line setting module and a server;
the line dividing module is used for dividing the overhead line to obtain a plurality of overhead line sections; the storage module is used for recording historical line data of the overhead line section and sending the historical line data to the historical monitoring module;
the history monitoring module is used for monitoring the history line condition of the overhead line section, obtaining a line monitoring value of the overhead line section and feeding the line monitoring value back to the server, and the server sends the line monitoring value of the overhead line section to the line setting module; the line setting module is used for setting the monitoring grade of the overhead line section to obtain the operation monitoring grade of the overhead line section and an operation monitoring period corresponding to the operation monitoring grade, and the operation monitoring period of the overhead line section is fed back to the server, and the server sends the operation monitoring period of the overhead line section to the operation acquisition module;
the operation acquisition module is used for acquiring real-time operation data of the overhead line section in combination with the operation monitoring period, and sending the real-time operation data to the server, and the server sends the real-time operation data to the operation analysis module;
the line setting module is used for feeding back the operation monitoring grade of the overhead line section to the server, and the server is used for sending the operation monitoring grade of the overhead line section to the storage module; the storage module is also used for storing operation monitoring parameters of the overhead line section under different operation monitoring grades, and sending the corresponding operation monitoring parameters to the operation analysis module according to the operation monitoring grades;
the operation analysis module is used for analyzing the operation condition of the overhead line section and generating an operation normal signal or an operation abnormal signal.
Further, the historical line data is the line length of the overhead line section, the number of line faults, the maintenance time length at each fault, and the number of overhead lines received by the overhead line section.
Further, the monitoring process of the history monitoring module is specifically as follows:
acquiring the number of line faults of an overhead line section;
then, obtaining maintenance time length of each fault, and obtaining maintenance average time length of the overhead line section by adding and summing the maintenance time length of each fault and dividing the sum by the line fault times;
simultaneously acquiring the line length of the overhead line section and the number of the overhead lines to be received;
and calculating a line monitoring value of the overhead line section.
Further, the setting process of the line setting module is specifically as follows:
if the line monitoring value is smaller than the first line monitoring threshold value, the line monitoring grade of the overhead line section is a third line monitoring grade;
if the line monitoring value is greater than or equal to the first line monitoring threshold value and less than the second line monitoring threshold value, the line monitoring grade of the overhead line section is the second line monitoring grade;
if the line monitoring value is greater than or equal to the second line monitoring threshold value, the line monitoring grade of the overhead line section is the first line monitoring grade;
and setting an operation monitoring period corresponding to the overhead line section according to the line monitoring level.
Further, the value of the first line monitoring threshold is smaller than the value of the second line monitoring threshold;
the first line monitoring level is higher than the second line monitoring level, which is higher than the third line monitoring level;
the operation monitoring period corresponding to the first line monitoring level is smaller than the operation monitoring period corresponding to the second line monitoring level, and the operation monitoring period corresponding to the second line monitoring level is smaller than the operation monitoring period corresponding to the third line monitoring level.
Further, the real-time operation data are load current value, line-to-ground voltage value, line power-on duration and short-circuit current duration of the overhead line section;
the operation monitoring parameters are load current standard values, fault current fixed values, line-to-ground voltage standard values, line power-on duration thresholds and short-circuit current duration intervals of overhead line sections under different operation monitoring levels, wherein the operation monitoring parameters are inversely proportional to the operation monitoring levels, i.e. the higher the operation monitoring level is, the smaller the value of the operation monitoring parameters is.
Further, the analysis process of the operation analysis module is specifically as follows:
acquiring real-time operation data of an overhead line section to obtain a load current value and a current abrupt change amount of the overhead line section, a line grounding voltage value, a line power-on duration and a short-circuit current duration;
if any one of the load current value is smaller than the load current standard value, the line power-on duration is smaller than the line power-on duration threshold value or the line ground voltage value is smaller than the line ground voltage standard value exists, generating a normal operation signal;
if the condition that the load current value is greater than or equal to the load current standard value and the line power-on duration is greater than or equal to the line power-on duration threshold value or the line ground voltage value is greater than or equal to the line ground voltage standard value and the line power-on duration is greater than or equal to the line power-on duration threshold value is met, the next step is entered;
comparing the duration of the short-circuit current with a threshold value of the duration of the short-circuit current, and comparing the load current value with a constant value of the fault current;
if the load current value is smaller than the fault current fixed value or the short-circuit current duration time does not belong to any one of the short-circuit current duration time intervals, generating a normal operation signal;
if the load current value is larger than or equal to the fault current fixed value and the short-circuit current duration belongs to the short-circuit current duration interval, entering the next step;
if the load current value is smaller than the load current standard value and the line-to-ground voltage value is 30% of the line-to-ground voltage standard value, an abnormal operation signal is generated, and otherwise, a normal operation signal is generated.
Further, the operation analysis module feeds back an operation normal signal or an operation abnormal signal to the server, if the server receives the operation normal signal, no operation is performed, if the server receives the operation abnormal signal, the corresponding overhead line section is calibrated and sent to the management module, the management module is used for carrying out power maintenance on the overhead line section after receiving the operation abnormal overhead line section, and meanwhile, the server increases the line fault times of the overhead line section once and records the maintenance duration of the line fault.
Compared with the prior art, the application has the beneficial effects that:
according to the application, firstly, an overhead line is divided by a line dividing module to obtain a plurality of overhead line sections, then, a historical line condition of the overhead line sections is monitored by a historical monitoring module, a line monitoring value of the overhead line sections is obtained and is sent to a line setting module, the line setting module sets a monitoring grade of the overhead line sections by combining the line monitoring value to obtain an operation monitoring grade of the overhead line sections and a corresponding operation monitoring period, after data acquisition is carried out by combining the operation monitoring period, operation monitoring parameters of the overhead line sections under different operation monitoring grades are obtained and are sent to an operation analysis module, and finally, the operation analysis module is utilized to analyze the operation condition of the overhead line sections to generate operation normal signals or operation abnormal signals.
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The present application is further described below with reference to the accompanying drawings for the convenience of understanding by those skilled in the art.
FIG. 1 is an overall system block diagram of the present application;
fig. 2 is a schematic diagram of an overhead line segment in the present application.
Detailed Description
The technical solutions of the present application will be clearly and completely described in connection with the embodiments, and it is obvious that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
In an embodiment, referring to fig. 1-2, an intelligent online safe operation monitoring system for an overhead line is provided, which includes an operation acquisition module, a line dividing module, an operation analysis module, a management module, a storage module, a history monitoring module, a line setting module and a server;
in a specific implementation, the line dividing module is used for dividing an overhead line to obtain a plurality of overhead line sections, and the overhead line sections can be obtained by dividing the overhead line by overhead poles/telegraph poles, wherein the overhead line between two groups of overhead poles/telegraph poles is the overhead line section;
in this embodiment, the server is connected with a storage module, and the storage module is configured to record historical line data of an overhead line segment, and send the historical line data to a history monitoring module;
it should be specifically noted that, the historical line data are the line length, the line fault number and the maintenance duration of each fault of the overhead line section, and the number of overhead lines received by the overhead line section, where the overhead line section is AB, AC and AD in fig. 2;
the history monitoring module is used for monitoring the history line condition of the overhead line section, and the monitoring process is specifically as follows:
marking overhead line segments as u, u=1, 2, … …, z, z being a positive integer;
acquiring the line fault times of the overhead line section, and marking the line fault times as GCu;
then, obtaining maintenance time length of each fault, and obtaining maintenance average time length WTu of the overhead line section by adding and summing the maintenance time length of each fault and dividing the sum by the line fault times;
simultaneously acquiring the line length CDu of the overhead line section and the number CLu of the bearing overhead lines;
the line monitoring value SJu of the overhead line segment is calculated by the formula SJu = (gcu×a1+ WTu ×a2+ CDu ×a3+ CLu ×a4)/(a1+a2+a3+a4); wherein a1, a2, a3 and a4 are all proportionality coefficients with fixed values, and the values of a1, a2, a3 and a4 are all larger than zero;
the history monitoring module feeds back the line monitoring value of the overhead line section to the server, and the server sends the line monitoring value of the overhead line section to the line setting module;
specifically, the line setting module is used for setting the monitoring grade of the overhead line section, and the setting process is specifically as follows:
if the line monitoring value is smaller than the first line monitoring threshold value, the line monitoring grade of the overhead line section is a third line monitoring grade;
if the line monitoring value is greater than or equal to the first line monitoring threshold value and less than the second line monitoring threshold value, the line monitoring grade of the overhead line section is the second line monitoring grade;
if the line monitoring value is greater than or equal to the second line monitoring threshold value, the line monitoring grade of the overhead line section is the first line monitoring grade; the value of the first line monitoring threshold is smaller than that of the second line monitoring threshold, the grade of the first line monitoring grade is higher than that of the second line monitoring grade, and the grade of the second line monitoring grade is higher than that of the third line monitoring grade;
setting an operation monitoring period corresponding to the overhead line section according to the line monitoring level, wherein the operation monitoring period corresponding to the first line monitoring level is smaller than the operation monitoring period corresponding to the second line monitoring level, and the operation monitoring period corresponding to the second line monitoring level is smaller than the operation monitoring period corresponding to the third line monitoring level;
for example: the operation monitoring period corresponding to the first line monitoring level is once every 30 minutes, the operation monitoring period corresponding to the second line monitoring level is once every 1 hour, and the operation monitoring period corresponding to the third line monitoring level is once every 2 hours;
the line setting module feeds back the operation monitoring period of the overhead line section to the server, and the server sends the operation monitoring period of the overhead line section to the operation acquisition module;
in this embodiment, the operation acquisition module is configured to acquire real-time operation data of an overhead line segment in conjunction with an operation monitoring period, and send the real-time operation data to a server, where the server sends the real-time operation data to the operation analysis module;
the real-time operation data are load current value, line-to-ground voltage value, line power-on duration, short-circuit current duration and the like of the overhead line section;
in practice, the data acquisition module may be a timer, a current monitoring device and a voltage monitoring device, and the specific acquisition device of the data acquisition module may be arranged on overhead poles/electric poles at two ends of the overhead line section, for acquiring real-time operation data of the overhead line section;
the line setting module feeds back the operation monitoring grade of the overhead line section to the server, and the server sends the operation monitoring grade of the overhead line section to the storage module;
the storage module is also used for storing operation monitoring parameters of the overhead line section under different operation monitoring grades, and sending the corresponding operation monitoring parameters to the operation analysis module according to the operation monitoring grades;
the specific explanation is that the operation monitoring parameters are load current standard value, fault current fixed value, line ground voltage standard value, line power-on time length threshold value and short circuit current duration time length interval of the overhead line section under different operation monitoring grades, the operation monitoring parameters are inversely proportional to the operation monitoring grades, namely, the higher the operation monitoring grade is, the smaller the value of the operation monitoring parameters is;
for example, the load current standard value of the first operation monitoring level is 10A, the load current standard value of the second operation monitoring level is 12A, and the load current standard value of the third operation monitoring level is 14A;
specifically, the short-circuit current duration interval comprises a short-circuit current duration interval lower limit value and a short-circuit current duration interval upper limit value, wherein the short-circuit current duration interval lower limit value is substantially the shortest duration of the short-circuit current;
the operation analysis module is used for analyzing the operation condition of the overhead line section, and the analysis process is specifically as follows:
acquiring real-time operation data of an overhead line section to obtain a load current value and a current abrupt change amount of the overhead line section, a line grounding voltage value, a line power-on duration and a short-circuit current duration;
if any one of the load current value is smaller than the load current standard value, the line power-on duration is smaller than the line power-on duration threshold value or the line ground voltage value is smaller than the line ground voltage standard value exists, generating a normal operation signal;
if the condition that the load current value is greater than or equal to the load current standard value and the line power-on duration is greater than or equal to the line power-on duration threshold value or the line ground voltage value is greater than or equal to the line ground voltage standard value and the line power-on duration is greater than or equal to the line power-on duration threshold value is met, the next step is entered;
comparing the duration of the short-circuit current with a threshold value of the duration of the short-circuit current, and comparing the load current value with a constant value of the fault current;
if the load current value is smaller than the fault current fixed value or the short-circuit current duration time does not belong to any one of the short-circuit current duration time intervals, generating a normal operation signal;
if the load current value is larger than or equal to the fault current fixed value and the short-circuit current duration belongs to the short-circuit current duration interval, entering the next step;
if the load current value is smaller than the load current standard value and the line-to-ground voltage value is 30% of the line-to-ground voltage standard value, generating an abnormal operation signal, otherwise, generating a normal operation signal;
the operation analysis module feeds back an operation normal signal or an operation abnormal signal to the server, if the server receives the operation normal signal, no operation is performed, if the server receives the operation abnormal signal, the corresponding overhead line section is calibrated and sent to the management module, the management module is used for carrying out power maintenance on the overhead line section after receiving the overhead line section with the operation abnormal signal, and meanwhile, the server increases the line fault times of the overhead line section once and records the maintenance duration of the line fault.
In the application, if a corresponding calculation formula appears, the calculation formulas are all dimensionality-removed and numerical calculation, and the weight coefficient, the proportion coefficient and other coefficients in the formulas are set to be a result value obtained by quantizing each parameter, so long as the proportion relation between the parameter and the result value is not influenced.
In another embodiment, a method for using an intelligent online safe operation monitoring system for an overhead line is provided, and the method specifically comprises the following steps:
step S100, a line dividing module is used for dividing an overhead line to obtain a plurality of overhead line sections, a storage module records historical line data of the overhead line sections, and the historical line data is sent to a historical monitoring module;
in the step S100, the historical line data are a line length of the overhead line section, a number of line faults, a maintenance time period at each fault, and a number of overhead lines received by the overhead line section;
step S200, a history monitoring module monitors the history line condition of the overhead line section, the line monitoring value of the overhead line section obtained by monitoring is fed back to a server, and the server sends the line monitoring value of the overhead line section to a line setting module;
in the step S200, the monitoring process of the history monitoring module is specifically as follows:
obtaining line fault times of an overhead line section, obtaining maintenance time length when each fault occurs, adding and summing the maintenance time length when each fault occurs and dividing the sum by the line fault times to obtain maintenance average time length of the overhead line section, simultaneously obtaining line length of the overhead line section and the number of received overhead lines, and calculating a line monitoring value of the overhead line section;
step S300, a line setting module sets the monitoring grade of the overhead line section, if the line monitoring value is smaller than a first line monitoring threshold value, the line monitoring grade of the overhead line section is a third line monitoring grade, if the line monitoring value is larger than or equal to the first line monitoring threshold value and smaller than a second line monitoring threshold value, the line monitoring grade of the overhead line section is a second line monitoring grade, if the line monitoring value is larger than or equal to the second line monitoring threshold value, the line monitoring grade of the overhead line section is a first line monitoring grade, the operation monitoring period corresponding to the overhead line section is set according to the line monitoring grade, the line setting module feeds back the operation monitoring period of the overhead line section to a server, and the server sends the operation monitoring period of the overhead line section to an operation acquisition module;
in the above step, the value of the first line monitoring threshold is smaller than the value of the second line monitoring threshold, the level of the first line monitoring level is higher than the level of the second line monitoring level, and the level of the second line monitoring level is higher than the level of the third line monitoring level;
meanwhile, the operation monitoring period corresponding to the first line monitoring level is smaller than the operation monitoring period corresponding to the second line monitoring level, and the operation monitoring period corresponding to the second line monitoring level is smaller than the operation monitoring period corresponding to the third line monitoring level;
step S400, an operation acquisition module acquires real-time operation data of an overhead line section in combination with an operation monitoring period, the real-time operation data is sent to a server, the server sends the real-time operation data to an operation analysis module, a line setting module feeds back operation monitoring grades of the overhead line section to the server, the server sends the operation monitoring grades of the overhead line section to a storage module, the storage module also stores operation monitoring parameters of the overhead line section under different operation monitoring grades, and the corresponding operation monitoring parameters are sent to the operation analysis module according to the operation monitoring grades;
in the step S400, the real-time operation data are specifically a load current value, a line-to-ground voltage value, a line power-on duration and a short-circuit current duration of the overhead line section; the operation monitoring parameters are load current standard values, fault current fixed values, line-to-ground voltage standard values, line power-on duration threshold values and short-circuit current duration intervals of overhead line sections under different operation monitoring levels;
specifically, the short-circuit current duration interval includes a short-circuit current duration interval lower limit value and a short-circuit current duration interval upper limit value, and the short-circuit current duration interval lower limit value is substantially the shortest duration of the short-circuit current;
step S500, an operation analysis module analyzes the operation condition of the overhead line section, generates an operation normal signal or an operation abnormal signal and feeds the operation normal signal or the operation abnormal signal back to the server;
in the step 500, the analysis process of the operation analysis module is specifically as follows:
acquiring real-time operation data of an overhead line section to obtain a load current value and a current abrupt change amount of the overhead line section, a line-to-ground voltage value, a line power-on duration and a short-circuit current duration, and generating an operation normal signal if any one of the load current value is smaller than a load current standard value, the line power-on duration is smaller than a line power-on duration threshold value or the line-to-ground voltage value is smaller than a line-to-ground voltage standard value exists;
if the condition that the load current value is greater than or equal to the load current standard value and the line power-on duration is greater than or equal to the line power-on duration threshold value, or the line ground voltage value is greater than or equal to the line ground voltage standard value and the line power-on duration threshold value is met, comparing the short-circuit current duration with the short-circuit current duration threshold value, comparing the load current value with the fault current fixed value, if the load current value is smaller than the fault current fixed value or the short-circuit current duration is not any one of the short-circuit current duration intervals, generating an operation normal signal, if the load current value is greater than or equal to the fault current fixed value and the short-circuit current duration is in the short-circuit current duration interval, entering the next step, if the load current value is smaller than the load current standard value and the line ground voltage value is 30% of the line ground voltage standard value, generating an operation abnormal signal, otherwise generating an operation normal signal;
step 600, if the server receives the normal running signal, no operation is performed, if the server receives the abnormal running signal, the corresponding overhead line section is calibrated and sent to the management module, the management module is used for carrying out power maintenance on the overhead line section after receiving the abnormal running overhead line section, and meanwhile, the server increases the line fault frequency of the overhead line section once and records the maintenance duration of the line fault.
The preferred embodiments of the application disclosed above are intended only to assist in the explanation of the application. The preferred embodiments are not intended to be exhaustive or to limit the application to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the application and the practical application, to thereby enable others skilled in the art to best understand and utilize the application. The application is limited only by the claims and the full scope and equivalents thereof.
Claims (8)
1. An intelligent online safe operation monitoring system for overhead lines, comprising:
the line dividing module is used for dividing the overhead line into a plurality of overhead line sections;
the storage module is used for recording historical line data of the overhead line section and sending the historical line data to the historical monitoring module;
the historical monitoring module is used for monitoring historical line conditions of the overhead line section, and obtaining a line monitoring value of the overhead line section and sending the line monitoring value to the line setting module through the server;
the line setting module is used for setting the monitoring grade of the overhead line section to obtain the operation monitoring grade of the overhead line section and an operation monitoring period corresponding to the operation monitoring grade, and the operation monitoring period is sent to the operation acquisition module through the server;
the operation acquisition module is used for acquiring real-time operation data of the overhead line section in combination with the operation monitoring period and sending the real-time operation data to the operation analysis module through the server;
the line setting module is used for sending the operation monitoring grade of the overhead line section to the storage module through the server;
the storage module is also used for storing operation monitoring parameters of the overhead line section under different operation monitoring grades and sending the corresponding operation monitoring parameters to the operation analysis module according to the operation monitoring grades;
and the operation analysis module is used for analyzing the operation condition of the overhead line section and generating an operation normal signal or an operation abnormal signal.
2. An intelligent on-line safe operation monitoring system for overhead lines according to claim 1, wherein the historical line data is line length of overhead line segments, number of line failures and maintenance duration at each failure, and number of overhead lines taken over by overhead line segments.
3. An intelligent online safe operation monitoring system for overhead lines according to claim 2, wherein the monitoring process of the history monitoring module is specifically as follows:
acquiring the number of line faults of an overhead line section;
then, obtaining maintenance time length of each fault, and obtaining maintenance average time length of the overhead line section by adding and summing the maintenance time length of each fault and dividing the sum by the line fault times;
simultaneously acquiring the line length of the overhead line section and the number of the overhead lines to be received;
and calculating a line monitoring value of the overhead line section.
4. An intelligent on-line safe operation monitoring system for overhead lines according to claim 3, wherein the setting process of the line setting module is specifically as follows:
if the line monitoring value is smaller than the first line monitoring threshold value, the line monitoring grade of the overhead line section is a third line monitoring grade;
if the line monitoring value is greater than or equal to the first line monitoring threshold value and less than the second line monitoring threshold value, the line monitoring grade of the overhead line section is the second line monitoring grade;
if the line monitoring value is greater than or equal to the second line monitoring threshold value, the line monitoring grade of the overhead line section is the first line monitoring grade;
and setting an operation monitoring period corresponding to the overhead line section according to the line monitoring level.
5. The intelligent online safe operation monitoring system for an overhead line of claim 4, wherein the first line monitoring threshold is less than the second line monitoring threshold;
the first line monitoring level is higher than the second line monitoring level, which is higher than the third line monitoring level;
the operation monitoring period corresponding to the first line monitoring level is smaller than the operation monitoring period corresponding to the second line monitoring level, and the operation monitoring period corresponding to the second line monitoring level is smaller than the operation monitoring period corresponding to the third line monitoring level.
6. The intelligent online safe operation monitoring system for the overhead line according to claim 1, wherein the real-time operation data are a load current value, a line-to-ground voltage value, a line power-on duration and a short-circuit current duration of an overhead line section;
the operation monitoring parameters are load current standard values, fault current fixed values, line-to-ground voltage standard values, line power-on duration thresholds and short-circuit current duration intervals of overhead line sections under different operation monitoring levels, wherein the operation monitoring parameters are inversely proportional to the operation monitoring levels, i.e. the higher the operation monitoring level is, the smaller the value of the operation monitoring parameters is.
7. An intelligent on-line safety operation monitoring system for overhead lines according to claim 6, wherein the analysis process of the operation analysis module is specifically as follows:
acquiring real-time operation data of an overhead line section to obtain a load current value and a current abrupt change amount of the overhead line section, a line grounding voltage value, a line power-on duration and a short-circuit current duration;
if any one of the load current value is smaller than the load current standard value, the line power-on duration is smaller than the line power-on duration threshold value or the line ground voltage value is smaller than the line ground voltage standard value exists, generating a normal operation signal;
if the condition that the load current value is greater than or equal to the load current standard value and the line power-on duration is greater than or equal to the line power-on duration threshold value, or the line ground voltage value is greater than or equal to the line ground voltage standard value and the line power-on duration threshold value is greater than or equal to the line power-on duration threshold value is met, comparing the short circuit current duration with the short circuit current duration threshold value, and comparing the load current value with the fault current fixed value;
if the load current value is smaller than the fault current fixed value or the short-circuit current duration time does not belong to any one of the short-circuit current duration time intervals, generating a normal operation signal;
if the load current value is larger than or equal to the fault current fixed value and the short-circuit current duration belongs to the short-circuit current duration interval, entering the next step;
if the load current value is smaller than the load current standard value and the line-to-ground voltage value is 30% of the line-to-ground voltage standard value, an abnormal operation signal is generated, and otherwise, a normal operation signal is generated.
8. The intelligent online safe operation monitoring system for overhead lines according to claim 7, wherein the operation analysis module feeds back an operation normal signal or an operation abnormal signal to a server;
if the server receives the normal operation signal, no operation is performed;
if the server receives the abnormal operation signal, the corresponding overhead line section is calibrated and sent to the management module, the management module is used for carrying out power maintenance on the overhead line section after receiving the abnormal operation overhead line section, and meanwhile, the server increases the line fault frequency of the overhead line section once and records the maintenance duration of the line fault.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310967121.2A CN116699294A (en) | 2023-08-03 | 2023-08-03 | Intelligent online safe operation monitoring system for overhead line |
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