CN116804687B - Intelligent phase checking method for power line - Google Patents
Intelligent phase checking method for power line Download PDFInfo
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- CN116804687B CN116804687B CN202311055439.XA CN202311055439A CN116804687B CN 116804687 B CN116804687 B CN 116804687B CN 202311055439 A CN202311055439 A CN 202311055439A CN 116804687 B CN116804687 B CN 116804687B
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Abstract
The invention relates to the field of nuclear phase of power lines, and particularly discloses an intelligent nuclear phase method of power lines, which comprises the steps of acquiring basic parameters of nuclear phase equipment, judging whether the performance of the nuclear phase equipment meets the standard, calibrating the nuclear phase equipment, and ensuring the accuracy of a measurement result of the nuclear phase equipment; the phase difference value between each line in the power grid at one end of each designated power line node and each line in the power grid at the other end is analyzed, and the power grid lines at the two ends of each designated power line node are judged to be the same and out of phase, so that accurate, convenient and rapid phase checking of the line phase sequence is realized; the method comprises the steps of obtaining power parameters of detection points on a power line where each specified power line node is located, analyzing the number of the specified power line nodes which are connected abnormally, obtaining the time required by nuclear phases of each specified power line node, evaluating the evaluation coefficient of nuclear phase operation of a power grid in a target area, and facilitating timely finding out and optimizing the defects of the nuclear phase operation and ensuring safe and stable operation of the power grid.
Description
Technical Field
The invention relates to the field of power line phase checking, in particular to an intelligent phase checking method for a power line.
Background
Along with the gradual improvement of the power supply reliability requirement of the power distribution network, the loop closing and power reversing operation on the power distribution network line is increasingly frequent, the phase positions of two sides of a loop closing point of the power distribution network must be kept consistent, otherwise, huge current is generated, serious power grid accidents are caused, and serious harm is caused to personnel, equipment and a power grid, so that the nuclear phase of the power line is very necessary.
The existing nuclear phase testing method is complex, needs to consume a great deal of time, labor and material costs, and has some defects: on the one hand, the existing nuclear phase method lacks of self-checking nuclear phase equipment, the nuclear phase equipment is not calibrated, errors or offsets possibly exist, and further the accuracy of the measurement result of the nuclear phase equipment is affected, and the accuracy of the measurement result of the nuclear phase equipment relates to the aspects of power distribution, phase sequence protection, fault diagnosis and the like, and is very important for safe and stable operation of a power system.
On the one hand, the existing phase checking method has the defects that each line in two power grids is identical and different in phase through manual checking, the workload is large, more manpower and material resources are consumed, mistakes are easy to occur, and potential safety hazards exist for phase checking staff.
On the other hand, the existing phase checking method lacks evaluation on regional power grid phase checking operation, is unfavorable for optimization of regional power grid planning and prevention of problems, and further cannot provide solid guarantee for safe and stable operation of a power grid.
Disclosure of Invention
Aiming at the problems, the invention provides an intelligent phase checking method for a power line, which comprises the following specific technical scheme: an intelligent phase checking method for a power line comprises the following steps: step one, nuclear phase equipment performance self-checking: detecting the performance of the nuclear phase equipment to be used, acquiring basic parameters of the nuclear phase equipment to be used, wherein the basic parameters comprise sensitivity and accuracy, judging whether the performance of the nuclear phase equipment to be used meets the standard according to the basic parameters of the nuclear phase equipment to be used, executing the second step if the performance meets the standard, otherwise, performing early warning.
Step two, automatic phase checking of the power line: and acquiring each power line node needing nuclear phase in the target regional power grid, marking the power line node as each appointed power line node, acquiring phase data of each line in the power grids at two ends of each appointed power line node, analyzing phase difference values between each line in the power grid at one end of each appointed power line node and each line in the power grid at the other end, and further judging that the power grid lines at two ends of each appointed power line node are out of phase.
Step three, connecting power lines: and (3) giving the same phase line identification to the lines with the same phase in the power grids at the two ends of each designated power line node, and connecting the lines.
Step four, detecting the circuit connection stability: acquiring power parameters of detection points on a power line where each specified power line node is located at each sampling time point in a monitoring period, wherein the power parameters comprise current and voltage, analyzing the phase connection stability coefficient of each specified power line node, judging whether the phase connection of each specified power line node is abnormal, and if so, acquiring the number of the specified power line nodes which are in phase connection abnormality.
And fifthly, evaluating nuclear phase operation of the regional power grid, namely acquiring the nuclear phase required length of each designated power line node, analyzing and processing the evaluation coefficient of the nuclear phase operation of the target regional power grid by combining the number of the designated power line nodes with abnormal connection.
On the basis of the above embodiment, the specific analysis process in the first step includes: obtaining nuclear phase results, phase angle differences and detection required lengths between all in-phase lines and all out-of-phase lines in two power grids corresponding to all voltage levels to be detected by using nuclear phase equipment, and respectively recording the phase angle differences and the detection required lengths between all in-phase lines and all out-of-phase lines in two power grids corresponding to all voltage levels to be detected by using the nuclear phase equipment as、/>And->、/>，/>Indicate->Number of voltage class,/->，/>Indicate->Number of in-phase line>，/>Indicate->Number of out-of-phase lines>。
Extracting the reference phase angle difference between each in-phase line and each out-phase line in two power grids corresponding to each voltage class stored in the database, and respectively marking the reference phase angle difference asAnd->And extracts the time length required for reference detection of the nuclear phase device stored in the database, and marks it as +.>。
On the basis of the above embodiment, the specific analysis process of the first step further includes: according to the nuclear phase results of the nuclear phase equipment to be used for detecting the same-phase lines and different-phase lines in the two power grids corresponding to each voltage level, judging whether the nuclear phase results of the nuclear phase equipment to be used for detecting the same-phase lines and different-phase lines in the two power grids corresponding to each voltage level are wrong, and respectively obtaining the nuclear phase equipment to be usedDetecting the nuclear phase error times of the in-phase lines and the nuclear phase error times of the out-of-phase lines in the power grid corresponding to each voltage level, accumulating to obtain accumulated nuclear phase error times of the power grid to be detected by using nuclear phase equipment, and marking the accumulated nuclear phase error times as the accumulated nuclear phase error times of the power grid of each voltage level。
By analysis of formulasObtaining the accuracy of the nuclear phase device to be used +.>Wherein->Representing natural constant->Indicating the influence factor corresponding to the number of nuclear phase errors of the preset unit number, < >>A deviation threshold representing a predetermined phase angle difference between the phase angle detection lines of the phase checking device.
On the basis of the above embodiment, the specific analysis process of the first step further includes: by analysis of formulasObtaining the sensitivity of the nuclear phase device to be used>WhereinRepresenting a preset sensitivity correction factor of the nuclear phase device to be used.
On the basis of the above embodiment, the specific analysis process of the first step further includes: acquiring the historical service life and maintenance times of the nuclear phase equipment to be used, and respectively recording the service life and maintenance times asAnd->。
Accuracy of nuclear phase device to be usedAnd sensitivity->Substitution formulaObtaining a performance evaluation index of a nuclear phase device to be used>Wherein->Weight factors representing preset accuracy and sensitivity respectively,respectively representing the influence factors of the preset unit service life and the unit maintenance times.
Comparing the performance evaluation index of the nuclear phase equipment to be used with a preset performance evaluation index threshold, and if the performance evaluation index of the nuclear phase equipment to be used is smaller than the preset performance evaluation index threshold, performing early warning on the condition that the performance of the nuclear phase equipment to be used does not reach the standard.
Based on the above embodiment, the specific analysis process in the second step is: and acquiring each power line node requiring nuclear phase in the target regional power grid, marking the power line node as each appointed power line node, detecting phase data of each line in the power grids at two ends of each appointed power line node through two transmitters of the nuclear phase equipment, and sending the measured phase data to a receiving host of the nuclear phase equipment, wherein the receiving host of the nuclear phase equipment calculates phase difference values between each line in the power grid at one end of each appointed power line node and each line in the power grid at the other end according to the phase data of the transmitters.
And comparing the phase difference value between each line in the power grid at one end of each designated power line node and each line in the power grid at the other end with a preset phase difference value range corresponding to the same phase and a preset phase difference value range corresponding to the different phase.
If the phase difference value between a certain line in one end power grid of a certain designated power line node and a certain line in the other end power grid belongs to a phase difference value range corresponding to the same phase, the certain line in one end power grid of the designated power line node is in phase with the certain line in the other end power grid, and if the phase difference value between the certain line in one end power grid of the certain designated power line node and the certain line in the other end power grid belongs to a phase difference value range corresponding to the different phase, the certain line in one end power grid of the designated power line node and the certain line in the other end power grid are out of phase, and then the two end power grid lines of each designated power line node are judged to be out of phase.
Based on the above embodiment, the specific analysis process in the fourth step includes: and setting the duration of the monitoring period, and setting each sampling time point in the monitoring period according to a preset equal time interval principle.
And arranging detection points on the power lines where the specified power line nodes are located according to a preset principle.
Acquiring the voltage and the current of each detection point on the power line where each designated power line node is located at each sampling time point in the monitoring period, and respectively marking the voltage and the current as，/>Indicate->Number of the sampling time points, +.>，/>Represent the first/>Number of each designated power line node +.>，/>Indicate->The number of the detection points,。
by analysis of formulasObtaining the voltage fluctuation coefficient of each appointed power line node>Wherein->Represents the number of sampling time points, +.>Indicating the number of detection points,representing the +.>Reference voltage of power line where node of power line is specified, < ->Representing a preset line voltage fluctuation threshold, +.>Indicating the%>Sample time Point->The power line where the designated power line node is located +.>The voltages at the detection points.
Similarly, according to the analysis method of the voltage fluctuation coefficient of each specified power line node, the current fluctuation coefficient of each specified power line node is obtained and is recorded as。
On the basis of the above embodiment, the specific analysis process in the fourth step further includes: the voltage fluctuation coefficient of each appointed power line nodeAnd current ripple coefficient->Substitution into analytical formulaObtaining the connection stability coefficient of each appointed power line node>WhereinA correction factor representing a predetermined phase stability factor.
Comparing the connection stability coefficient of each designated power line node with a preset connection stability coefficient early warning value, if the connection stability coefficient of a certain designated power line node is smaller than the preset connection stability coefficient early warning value, the designated power line node is connected abnormally, counting the number of the designated power line nodes connected abnormally, and recording the number as。
Based on the above embodiment, the specific analysis procedure in the fifth step is: acquiring the time length required by each designated power line node to complete the phase identification and matching of each line in the power grids at the two ends of the designated power line node, and recording the time length as the time length required by the nuclear phase of each designated power line node and representing the time length as。
By analysis of formulasObtaining an evaluation coefficient of nuclear phase operation of the target area power grid ∈>Wherein->Representing the number of designated power line nodes +.>Indicating a preset length threshold for the nuclear phase,/->And (3) representing the influence factors of the preset unit number phase connection abnormal designated power line nodes, and feeding back the evaluation coefficients of the nuclear phase operation of the power grid in the target area to the power grid operation and maintenance center of the target area.
Compared with the prior art, the intelligent phase checking method for the power line has the following beneficial effects: 1. according to the invention, through performance tests under various voltage levels on the nuclear phase equipment, the accuracy and the sensitivity of the nuclear phase equipment are analyzed, and further the nuclear phase equipment is calibrated to correct errors or drift possibly existing in the nuclear phase equipment, so that the accuracy and the reliability of the measurement result of the nuclear phase equipment are ensured.
2. The intelligent phase checking device realizes intelligent phase checking by means of the phase checking equipment, and can display a measuring result in time during phase checking, namely, whether two power lines are in phase or out of phase, has simple operation and higher accuracy, realizes accurate, convenient and quick phase checking of the phase sequences of the lines, reduces the operation and maintenance cost of a power grid, and ensures the safety of phase checking staff.
3. The regional power grid nuclear phase operation is evaluated from the aspects of rapidity and accuracy, the defects of the nuclear phase operation are found in time, optimization is performed, the safe and stable operation of a power grid is further ensured, the efficiency is improved, the problems of optimization planning and prevention are solved, the reliability of power supply is further ensured, the maintenance cost of the power grid is reduced, and the energy utilization efficiency is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic flow chart of the method of the present invention.
Fig. 2 is a schematic diagram of the nuclear phase device according to the present invention when two transmitters are simultaneously connected to the same phase line in two power grids.
Fig. 3 is a schematic diagram of the nuclear phase device according to the present invention when two transmitters are simultaneously connected to different phase lines in two power grids.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, the intelligent phase checking method for a power line provided by the invention comprises the following steps: step one, nuclear phase equipment performance self-checking: detecting the performance of the nuclear phase equipment to be used, acquiring basic parameters of the nuclear phase equipment to be used, wherein the basic parameters comprise sensitivity and accuracy, judging whether the performance of the nuclear phase equipment to be used meets the standard according to the basic parameters of the nuclear phase equipment to be used, executing the second step if the performance meets the standard, otherwise, performing early warning.
As a preferred embodiment, the specific analysis process of the first step includes: referring to fig. 2 and 3, a nuclear phase result, a phase angle difference and a detection required length between each in-phase line and each out-phase line in two power grids corresponding to each voltage level to be detected by using a nuclear phase device are obtained, and the phase angle difference and the detection required length between each in-phase line and each out-phase line in two power grids corresponding to each voltage level to be detected by using the nuclear phase device are respectively recorded as、/>And->、，/>Indicate->Number of voltage class,/->，/>Indicate->Number of in-phase line>，/>Representation ofFirst->Number of out-of-phase lines>。
Extracting the reference phase angle difference between each in-phase line and each out-phase line in two power grids corresponding to each voltage class stored in the database, and respectively marking the reference phase angle difference asAnd->And extracts the time length required for reference detection of the nuclear phase device stored in the database, and marks it as +.>。
It should be noted that, the voltages corresponding to the voltage classes are all within an acceptable range of the nuclear phase device to be used.
It should be noted that, each in-phase line in the two power grids corresponding to each voltage class includes an a phase, a B phase, and a C phase.
The phase-difference circuit of the two electric networks corresponding to each voltage class comprises an A phase, a B phase, an A phase, a C phase, a B phase, a C phase, an A phase and a C phase.
It should be noted that the nuclear phase results include in-phase and out-of-phase.
The phase angle difference between the in-phase lines includes 0 ° and 360 °.
It should be noted that the phase angle difference between the out-of-phase lines includes 120 ° and 240 °.
The detection required time is the interval time between the starting power-on time of the receiving host and the time of displaying the detection result in the nuclear phase equipment to be used.
It should be noted that the nuclear phase device is composed of two transmitters and a receiving host, and the transmitters can determine whether the line is charged or not and measure the phase and frequency of the line.
As a preferred embodiment, the specific analysis process of the first step further includes: according to the nuclear phase results of the nuclear phase equipment to be used for detecting the same-phase lines and different-phase lines in the two power grids corresponding to each voltage level, judging whether the nuclear phase results of the nuclear phase equipment to be used for detecting the same-phase lines and different-phase lines in the two power grids corresponding to each voltage level are wrong, respectively acquiring the nuclear phase error times of the same-phase lines and the nuclear phase error times of the different-phase lines in the power grids corresponding to each voltage level to be used for detecting the same-phase lines, accumulating the nuclear phase error times to obtain the accumulated nuclear phase error times of the power grids corresponding to each voltage level to be used for detecting the nuclear phase equipment, and recording the accumulated nuclear phase error times as the accumulated nuclear phase error times of the power grids。
By analysis of formulasObtaining the accuracy of the nuclear phase device to be used +.>Wherein->Representing natural constant->Indicating the influence factor corresponding to the number of nuclear phase errors of the preset unit number, < >>A deviation threshold representing a predetermined phase angle difference between the phase angle detection lines of the phase checking device.
As a preferred embodiment, the specific analysis process of the first step further includes: by analysis of formulasObtaining the sensitivity of the nuclear phase device to be used>WhereinRepresenting a preset sensitivity correction factor of the nuclear phase device to be used.
As a preferred embodiment, the specific analysis process of the first step further includes: acquiring the historical service life and maintenance times of the nuclear phase equipment to be used, and respectively recording the service life and maintenance times asAnd->。
Accuracy of nuclear phase device to be usedAnd sensitivity->Substitution formulaObtaining a performance evaluation index of a nuclear phase device to be used>Wherein->Weight factors representing preset accuracy and sensitivity respectively,respectively representing the influence factors of the preset unit service life and the unit maintenance times.
Comparing the performance evaluation index of the nuclear phase equipment to be used with a preset performance evaluation index threshold, and if the performance evaluation index of the nuclear phase equipment to be used is smaller than the preset performance evaluation index threshold, performing early warning on the condition that the performance of the nuclear phase equipment to be used does not reach the standard.
In the embodiment, the accuracy and the sensitivity of the nuclear phase equipment are analyzed by performing performance tests on the nuclear phase equipment under various voltage levels, and further the nuclear phase equipment is calibrated to correct errors or drift possibly existing in the nuclear phase equipment, so that the accuracy and the reliability of the measurement result of the nuclear phase equipment are ensured.
Step two, automatic phase checking of the power line: and acquiring each power line node needing nuclear phase in the target regional power grid, marking the power line node as each appointed power line node, acquiring phase data of each line in the power grids at two ends of each appointed power line node, analyzing phase difference values between each line in the power grid at one end of each appointed power line node and each line in the power grid at the other end, and further judging that the power grid lines at two ends of each appointed power line node are out of phase.
As a preferable scheme, the specific analysis process of the second step is as follows: and acquiring each power line node requiring nuclear phase in the target regional power grid, marking the power line node as each appointed power line node, detecting phase data of each line in the power grids at two ends of each appointed power line node through two transmitters of the nuclear phase equipment, and sending the measured phase data to a receiving host of the nuclear phase equipment, wherein the receiving host of the nuclear phase equipment calculates phase difference values between each line in the power grid at one end of each appointed power line node and each line in the power grid at the other end according to the phase data of the transmitters.
And comparing the phase difference value between each line in the power grid at one end of each designated power line node and each line in the power grid at the other end with a preset phase difference value range corresponding to the same phase and a preset phase difference value range corresponding to the different phase.
If the phase difference value between a certain line in one end power grid of a certain designated power line node and a certain line in the other end power grid belongs to a phase difference value range corresponding to the same phase, the certain line in one end power grid of the designated power line node is in phase with the certain line in the other end power grid, and if the phase difference value between the certain line in one end power grid of the certain designated power line node and the certain line in the other end power grid belongs to a phase difference value range corresponding to the different phase, the certain line in one end power grid of the designated power line node and the certain line in the other end power grid are out of phase, and then the two end power grid lines of each designated power line node are judged to be out of phase.
In the embodiment, the intelligent nuclear phase is realized by the nuclear phase equipment, and the measurement result can be displayed in time during the nuclear phase, namely, whether two power lines are in phase or out of phase is displayed, so that the operation is simple, the accuracy is high, the accurate, convenient and quick nuclear phase of the line phase sequence is realized, the operation and maintenance cost of a power grid is reduced, and the safety of nuclear phase staff is ensured.
Step three, connecting power lines: and (3) giving the same phase line identification to the lines with the same phase in the power grids at the two ends of each designated power line node, and connecting the lines.
Step four, detecting the circuit connection stability: acquiring power parameters of detection points on a power line where each specified power line node is located at each sampling time point in a monitoring period, wherein the power parameters comprise current and voltage, analyzing the phase connection stability coefficient of each specified power line node, judging whether the phase connection of each specified power line node is abnormal, and if so, acquiring the number of the specified power line nodes which are in phase connection abnormality.
As a preferred embodiment, the specific analysis process in the fourth step includes: and setting the duration of the monitoring period, and setting each sampling time point in the monitoring period according to a preset equal time interval principle.
And arranging detection points on the power lines where the specified power line nodes are located according to a preset principle.
Acquiring the voltage and the current of each detection point on the power line where each designated power line node is located at each sampling time point in the monitoring period, and respectively marking the voltage and the current as，/>Indicate->Number of the sampling time points, +.>，Indicate->Number of each designated power line node +.>，/>Indicate->The number of the detection points,。
by analysis of formulasObtaining the voltage fluctuation coefficient of each appointed power line node>Wherein->Represents the number of sampling time points, +.>Indicating the number of detection points,representing the +.>Reference voltage of power line where node of power line is specified, < ->Representing a preset line voltage fluctuation threshold, +.>Indicating the%>Sample time Point->The power line where the designated power line node is located +.>The voltages at the detection points.
Similarly, according to the analysis method of the voltage fluctuation coefficient of each specified power line node, the current fluctuation coefficient of each specified power line node is obtained and is recorded as。
As a preferred embodiment, the specific analysis process in the fourth step further includes: the voltage fluctuation coefficient of each appointed power line nodeAnd current ripple coefficient->Substitution into analytical formulaObtaining the connection stability coefficient of each appointed power line node>WhereinA correction factor representing a predetermined phase stability factor.
Comparing the connection stability coefficient of each designated power line node with a preset connection stability coefficient early warning value, and if the connection stability coefficient of a certain designated power line node is smaller than the preset connection stability coefficient early warning value, then the designated power lineCounting the number of the specified power line nodes with abnormal connection of the nodes, and recording the number as。
And fifthly, evaluating nuclear phase operation of the regional power grid, namely acquiring the nuclear phase required length of each designated power line node, analyzing and processing the evaluation coefficient of the nuclear phase operation of the target regional power grid by combining the number of the designated power line nodes with abnormal connection.
As a preferred scheme, the specific analysis process in the fifth step is as follows: acquiring the time length required by each designated power line node to complete the phase identification and matching of each line in the power grids at the two ends of the designated power line node, and recording the time length as the time length required by the nuclear phase of each designated power line node and representing the time length as。
By analysis of formulasObtaining an evaluation coefficient of nuclear phase operation of the target area power grid ∈>Wherein->Representing the number of designated power line nodes +.>Indicating a preset length threshold for the nuclear phase,/->And (3) representing the influence factors of the preset unit number phase connection abnormal designated power line nodes, and feeding back the evaluation coefficients of the nuclear phase operation of the power grid in the target area to the power grid operation and maintenance center of the target area.
In the embodiment, the regional power grid nuclear phase operation is evaluated from the aspects of rapidness and accuracy, so that defects of the nuclear phase operation are found in time and are optimized, the safe and stable operation of a power grid is further ensured, the efficiency is improved, the planning and prevention problems are optimized, the reliability of power supply is further ensured, the maintenance cost of the power grid is reduced, and the energy utilization efficiency is improved.
The foregoing is merely illustrative and explanatory of the principles of this invention, as various modifications and additions may be made to the specific embodiments described, or similar arrangements may be substituted by those skilled in the art, without departing from the principles of this invention or beyond the scope of this invention as defined in the claims.
Claims (2)
1. The intelligent phase checking method for the power line is characterized by comprising the following steps of:
step one, nuclear phase equipment performance self-checking: detecting the performance of the nuclear phase equipment to be used, and acquiring basic parameters of the nuclear phase equipment to be used, wherein the basic parameters comprise sensitivity and accuracy, judging whether the performance of the nuclear phase equipment to be used meets the standard according to the basic parameters of the nuclear phase equipment to be used, if the performance meets the standard, executing the second step, otherwise, performing early warning;
step two, automatic phase checking of the power line: acquiring each power line node needing nuclear phase in a target regional power grid, marking the power line node as each appointed power line node, acquiring phase data of each line in the power grids at two ends of each appointed power line node, analyzing phase difference values between each line in the power grid at one end of each appointed power line node and each line in the power grid at the other end, and further judging that the power grid lines at two ends of each appointed power line node are out of phase;
step three, connecting power lines: the same phase line identification is given to the lines with the same phase in the power grids at the two ends of each designated power line node, and the lines are connected;
step four, detecting the circuit connection stability: acquiring power parameters of detection points on a power line where each specified power line node is located at each sampling time point in a monitoring period, wherein the power parameters comprise current and voltage, analyzing the phase connection stability coefficient of each specified power line node, judging whether the phase connection of each specified power line node is abnormal, and if so, acquiring the number of the specified power line nodes which are in phase connection abnormality;
step five, regional power grid nuclear phase operation evaluation, namely acquiring the nuclear phase required length of each designated power line node, analyzing the evaluation coefficient of the nuclear phase operation of the target regional power grid by combining the number of the designated power line nodes with abnormal connection, and processing;
the specific analysis process of the first step comprises the following steps:
obtaining nuclear phase results, phase angle differences and detection required lengths between all in-phase lines and all out-of-phase lines in two power grids corresponding to all voltage levels to be detected by using nuclear phase equipment, and respectively recording the phase angle differences and the detection required lengths between all in-phase lines and all out-of-phase lines in two power grids corresponding to all voltage levels to be detected by using the nuclear phase equipment as、And->、/>，/>Indicate->Number of voltage class,/->，/>Indicate->The number of the same-phase line,，/>indicate->Number of out-of-phase lines>；
Extracting the reference phase angle difference between each in-phase line and each out-phase line in two power grids corresponding to each voltage class stored in the database, and respectively marking the reference phase angle difference asAnd->And extracts the time length required for reference detection of the nuclear phase device stored in the database, and marks it as +.>;
According to the nuclear phase results of the nuclear phase equipment to be used for detecting the same-phase lines and different-phase lines in the two power grids corresponding to each voltage level, judging whether the nuclear phase results of the nuclear phase equipment to be used for detecting the same-phase lines and different-phase lines in the two power grids corresponding to each voltage level are wrong, respectively acquiring the nuclear phase error times of the same-phase lines and the nuclear phase error times of the different-phase lines in the power grids corresponding to each voltage level to be used for detecting the same-phase lines, accumulating the nuclear phase error times to obtain the accumulated nuclear phase error times of the power grids corresponding to each voltage level to be used for detecting the nuclear phase equipment, and recording the accumulated nuclear phase error times as the accumulated nuclear phase error times of the power grids；
By dividing into separate partsAnalytical formulaObtaining the accuracy of the nuclear phase device to be used +.>Wherein->Representing natural constant->Indicating the influence factor corresponding to the number of nuclear phase errors of the preset unit number, < >>A deviation threshold value representing a phase angle difference between detection lines of a preset nuclear phase device;
by analysis of formulasObtaining the sensitivity of the nuclear phase device to be used>Wherein->Representing a preset sensitivity correction factor of the nuclear phase equipment to be used;
acquiring the historical service life and maintenance times of the nuclear phase equipment to be used, and respectively recording the service life and maintenance times asAnd->；
Accuracy of nuclear phase device to be usedAnd sensitivity->Substitution formulaObtaining a performance evaluation index of a nuclear phase device to be used>Wherein->Weight factors representing preset accuracy and sensitivity respectively,respectively representing the influence factors of the preset unit service life and the unit maintenance times;
comparing the performance evaluation index of the nuclear phase equipment to be used with a preset performance evaluation index threshold, and if the performance evaluation index of the nuclear phase equipment to be used is smaller than the preset performance evaluation index threshold, performing early warning on the condition that the performance of the nuclear phase equipment to be used does not reach the standard;
the specific analysis process of the fourth step comprises the following steps:
setting the duration of a monitoring period, and setting each sampling time point in the monitoring period according to a preset equal time interval principle;
arranging detection points on the power lines where the specified power line nodes are located according to a preset principle;
acquiring the voltage and the current of each detection point on the power line where each designated power line node is located at each sampling time point in the monitoring period, and respectively marking the voltage and the current as，/>Indicate->Number of the sampling time points, +.>，/>Indicate->Number of each designated power line node +.>，/>Indicate->The number of the detection points,；
by analysis of formulasObtaining the voltage fluctuation coefficient of each appointed power line node>Wherein->Represents the number of sampling time points, +.>Indicating the number of detection points,representing the +.>Reference voltage of power line where node of power line is specified, < ->Representing a preset line voltage fluctuation threshold, +.>Indicating the%>Sample time Point->The power line where the designated power line node is located +.>Voltages at the detection points;
similarly, according to the analysis method of the voltage fluctuation coefficient of each specified power line node, the current fluctuation coefficient of each specified power line node is obtained and is recorded as;
The voltage fluctuation coefficient of each appointed power line nodeAnd current ripple coefficient->Substitution into analytical formulaObtaining the connection stability coefficient of each appointed power line node>Wherein->A correction factor representing a predetermined phase stability factor;
comparing the connection stability coefficient of each designated power line node with a preset connection stability coefficient early warning value, if the connection stability coefficient of a certain designated power line node is smaller than the preset connection stability coefficient early warning value, the designated power line node is connected abnormally, counting the number of the designated power line nodes connected abnormally, and recording the number as;
The specific analysis process in the fifth step is as follows:
acquiring the time length required by each designated power line node to complete the phase identification and matching of each line in the power grids at the two ends of the designated power line node, and recording the time length as the time length required by the nuclear phase of each designated power line node and representing the time length as；
By analysis of formulasObtaining an evaluation coefficient of nuclear phase operation of the target area power grid ∈>Wherein->Representing the number of designated power line nodes +.>Indicating a preset length threshold for the nuclear phase,/->The influence factors representing the preset unit number phase connection abnormality designated power line nodes are used for nuclear power grid of the target areaAnd the evaluation coefficient of the phase operation is fed back to the power grid operation and maintenance center of the target area.
2. The power line intelligent phase checking method according to claim 1, wherein: the specific analysis process of the second step is as follows:
acquiring each power line node needing nuclear phase in a target regional power grid, marking the power line node as each appointed power line node, detecting phase data of each line in the power grids at two ends of each appointed power line node through two transmitters of nuclear phase equipment, and sending the measured phase data to a receiving host of the nuclear phase equipment, wherein the receiving host of the nuclear phase equipment calculates phase difference values between each line in the power grid at one end of each appointed power line node and each line in the power grid at the other end according to the phase data of the transmitters;
comparing the phase difference value between each line in the power grid at one end of each designated power line node and each line in the power grid at the other end with a preset phase difference value range corresponding to the same phase and a preset phase difference value range corresponding to the different phase;
if the phase difference value between a certain line in one end power grid of a certain designated power line node and a certain line in the other end power grid belongs to a phase difference value range corresponding to the same phase, the certain line in one end power grid of the designated power line node is in phase with the certain line in the other end power grid, and if the phase difference value between the certain line in one end power grid of the certain designated power line node and the certain line in the other end power grid belongs to a phase difference value range corresponding to the different phase, the certain line in one end power grid of the designated power line node and the certain line in the other end power grid are out of phase, and then the two end power grid lines of each designated power line node are judged to be out of phase.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10216791A1 (en) * | 2002-04-15 | 2003-10-30 | Horstmann Gmbh Dipl Ing H | Alternating voltage phase comparison method in which a single pole phase comparator is used to count the number of cycles within a given time for each voltage, with a division remainder value determined to indicate phase shift |
| CN104360159A (en) * | 2014-11-19 | 2015-02-18 | 国网浙江余姚市供电公司 | Nuclear phase method and device |
| CN110928866A (en) * | 2019-12-09 | 2020-03-27 | 国网天津市电力公司 | Line topology checking method and system based on power failure information big data analysis |
| CN112327064A (en) * | 2019-08-05 | 2021-02-05 | 武汉森木磊石科技有限公司 | Three-phase sequence indicator and system |
| CN115792420A (en) * | 2022-11-11 | 2023-03-14 | 广东电网有限责任公司 | Line phase checking method, system, equipment and medium |
-
2023
- 2023-08-22 CN CN202311055439.XA patent/CN116804687B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10216791A1 (en) * | 2002-04-15 | 2003-10-30 | Horstmann Gmbh Dipl Ing H | Alternating voltage phase comparison method in which a single pole phase comparator is used to count the number of cycles within a given time for each voltage, with a division remainder value determined to indicate phase shift |
| CN104360159A (en) * | 2014-11-19 | 2015-02-18 | 国网浙江余姚市供电公司 | Nuclear phase method and device |
| CN112327064A (en) * | 2019-08-05 | 2021-02-05 | 武汉森木磊石科技有限公司 | Three-phase sequence indicator and system |
| CN110928866A (en) * | 2019-12-09 | 2020-03-27 | 国网天津市电力公司 | Line topology checking method and system based on power failure information big data analysis |
| CN115792420A (en) * | 2022-11-11 | 2023-03-14 | 广东电网有限责任公司 | Line phase checking method, system, equipment and medium |
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