CN114325495B - Operation protection method for distribution transformer based on loss comparison - Google Patents
Operation protection method for distribution transformer based on loss comparison Download PDFInfo
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- CN114325495B CN114325495B CN202111565533.0A CN202111565533A CN114325495B CN 114325495 B CN114325495 B CN 114325495B CN 202111565533 A CN202111565533 A CN 202111565533A CN 114325495 B CN114325495 B CN 114325495B
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Abstract
The invention discloses an operation protection method for a distribution transformer based on loss comparison, which belongs to the technical field of distribution transformer operation protection, solves the technical problem that the loss change of the distribution transformer cannot be accurately analyzed in the prior art, analyzes whether the operation of the distribution transformer has a fault or abnormal operation, and reduces the problem that the distribution transformer still continues to operate when the distribution transformer has a fault, so that the equipment abrasion of the distribution transformer is increased, the service life of the distribution transformer is reduced, and the irreversible equipment loss is brought at the same time; the loss of the transformer is analyzed through two angles, so that the loss analysis accuracy of the transformer is higher, the change of the transformer which is small in influence and actually exists can be detected through the whole loss analysis, the change of the transformer which is generated in real time can be detected through the specific loss analysis, the real-time operation of the transformer is monitored in real time, and the operation protection efficiency of the transformer is improved.
Description
Technical Field
The invention relates to the technical field of distribution transformer operation protection, in particular to an operation protection method for a distribution transformer based on loss comparison.
Background
The distribution transformer is a device for changing alternating voltage/current with a certain value into another voltage/current with the same frequency or different values, when a primary winding is electrified with alternating current, alternating magnetic flux is generated, the alternating magnetic flux induces alternating electromotive force in a secondary winding through the magnetic conduction effect of an iron core, the level of the secondary electromotive force is related to the number of turns of the secondary winding, namely the voltage is in direct proportion to the number of turns; the distribution transformer is mainly used for transmitting electric energy, so that the rated capacity is a main parameter of the distribution transformer, and when the distribution transformer is arranged in a product structure, the amorphous alloy iron core is not influenced by external force, and meanwhile, the characteristic parameters of the amorphous alloy are required to be accurately and reasonably selected during calculation;
however, in the prior art, the loss change of the distribution transformer cannot be accurately analyzed, so that the quality change is generated by accumulation due to small influence problems, and the accidental fault of the distribution transformer is caused; in addition, when the distribution transformer carries out fault monitoring, the purposes of reducing the fault monitoring cost and not influencing the monitoring efficiency cannot be achieved;
in view of the above technical drawbacks, a solution is proposed.
Disclosure of Invention
The invention aims to solve the problems, and provides an operation protection method for a distribution transformer based on loss comparison, which analyzes whether the operation of the distribution transformer has a fault or abnormal operation, reduces the increase of equipment abrasion of the distribution transformer caused by continuous operation when the distribution transformer has a fault, reduces the service life of the distribution transformer and brings irreversible equipment loss; the loss of the transformer is analyzed through two angles, so that the loss analysis accuracy of the transformer is higher, the change of the transformer which is small in influence and actually exists can be detected through the whole loss analysis, the change of the transformer which is generated in real time can be detected through the specific loss analysis, the real-time operation of the transformer is monitored in real time, and the operation protection efficiency of the transformer is improved.
The purpose of the invention can be realized by the following technical scheme:
an operation protection method for a distribution transformer based on loss comparison comprises the following steps:
the method comprises the following steps of firstly, positioning analysis, namely analyzing the real-time position of a distribution transformer and judging whether the position of distribution transformation is qualified or not;
secondly, analyzing a route, namely analyzing the cable laying route of the distribution transformer with qualified position analysis so as to judge whether the operation of the distribution transformer is qualified;
analyzing and comparing the loss of the distribution transformer running in real time so as to judge whether the real-time running of the distribution transformer is abnormal or not;
and step four, operation analysis is carried out, sounds corresponding to different operation faults are obtained according to historical operation of the distribution transformer, the corresponding sounds are analyzed and marked, and real-time operation detection is carried out on the distribution transformer which operates in real time according to the sounds.
As a preferred embodiment of the present invention, in the first step, the real-time position of the distribution transformer is analyzed, and the specific position analysis process is as follows:
collecting distribution transformers in each power utilization area, and setting a label i of the collected distribution transformers, wherein the label i is a natural number greater than 1; collecting the number of the residents around the distribution transformer and the number of the buildings around the distribution transformer, and respectively marking the number of the residents around the distribution transformer and the number of the buildings around the distribution transformer as JMi and SLi; collecting the number of monitoring cameras in the area where each distribution transformer is located, and marking the number of the monitoring cameras in the area where the distribution transformers are located as SXi;
obtaining a position analysis coefficient Xi of each distribution transformer through analysis; comparing the position analysis coefficient of each distribution transformer to a position analysis coefficient threshold:
if the position analysis coefficient of the distribution transformer is larger than or equal to the position analysis coefficient threshold value, judging that the position analysis of the corresponding distribution transformer is qualified, and marking the corresponding distribution transformer as an environmental safety transformer; and if the position analysis coefficient of the distribution transformer is less than the position analysis coefficient threshold value, judging that the position analysis of the corresponding distribution transformer is unqualified, marking the corresponding distribution transformer as an environment unsafe transformer, generating a transformer environment risk signal and sending the transformer environment risk signal to a mobile phone terminal of a manager.
As a preferred embodiment of the present invention, in the second step, the environmental safety transformer is subjected to a distribution route analysis, and a specific route analysis process is as follows:
collecting cable laying routes of the environment safety transformer in the corresponding area, marking the collected cable laying routes as power distribution routes, collecting a cross wind force value born by the power distribution route corresponding to the environment safety transformer and an average horizontal camber of the corresponding power distribution route, and respectively enabling the cross wind force value born by the power distribution route corresponding to the environment safety transformer and the average horizontal camber of the corresponding power distribution route to be respectively equal to a cross wind force value threshold value and an average horizontal camber threshold value;
if the crosswind force value born by the power distribution line corresponding to the environmental safety transformer is larger than the crosswind force value threshold value, and the average horizontal camber of the corresponding power distribution line is larger than the average horizontal camber threshold value, judging that the corresponding power distribution line is unqualified, generating a line early warning signal, counting the number of the power distribution lines corresponding to the line early warning signal, if the number of the power distribution lines corresponding to the line early warning signal exceeds the corresponding number threshold value, judging that the power distribution line corresponding to the environmental safety transformer is abnormal, generating a line maintenance signal, and sending the line maintenance signal to a mobile phone terminal of a corresponding manager; if the crosswind force value born by the power distribution line corresponding to the environment safety transformer is smaller than the crosswind force value threshold value, and the average horizontal camber of the corresponding power distribution line is smaller than the average horizontal camber threshold value, the corresponding power distribution line is judged to be qualified through analysis, a line qualified signal is generated, the number of the power distribution lines corresponding to the line qualified signal is counted, if the number of the power distribution lines corresponding to the line qualified signal exceeds the corresponding number threshold value, the power distribution line corresponding to the environment safety transformer is judged to be normal, a line normal signal is generated, and the line normal signal is sent to a mobile phone terminal of a corresponding manager.
As a preferred embodiment of the present invention, in step three, the loss analysis is performed on the distribution transformer operating in real time, and the specific loss analysis process is as follows:
representing the power distribution period from the time when the distribution transformer executes power distribution to the time when the distribution transformer finishes power distribution, setting a real-time operation time threshold, acquiring the temperature and the power loss generated when the distribution transformer starts to operate in the power distribution period within the real-time operation time threshold, wherein o is a natural number greater than 3, and marking the temperature and the power loss generated when the distribution transformer starts to operate in the power distribution period within the real-time operation time threshold as the initial operation temperature and the initial operation power loss respectively; acquiring the temperature and the electric quantity loss generated during the operation of the last power distribution period within the real-time operation time threshold, and respectively marking the temperature and the electric quantity loss generated during the operation of the last power distribution period within the real-time operation time threshold as a last operation temperature and a last operation electric loss; obtaining an overall heat difference value by comparing the first operation temperature with the last operation temperature, and obtaining an overall electric loss difference value by comparing the first operation electric loss with the last operation electric loss; if the integral heat difference value and the integral electric loss difference value do not exceed the corresponding threshold values, judging that the integral loss analysis of the corresponding power distribution transformer cabinet is qualified; if any value of the overall heat difference value and the overall electric loss difference value exceeds the corresponding threshold value, judging that the overall loss analysis of the corresponding distribution transformer cabinet is unqualified;
selecting two adjacent power distribution cycles within an operation time threshold, respectively acquiring a corresponding heat difference value and a corresponding electric loss difference value when the two adjacent power distribution cycles operate, respectively marking the corresponding heat difference value and the corresponding electric loss difference value when the two adjacent power distribution cycles operate as a specific heat difference value and a specific electric loss difference value, and judging that the specific loss analysis of the corresponding power distribution transformer is qualified if the specific heat difference value and the specific electric loss difference value when the two adjacent power distribution cycles operate do not exceed the corresponding threshold; and if any value of the specific heat difference value and the specific electric loss difference value in the operation of two adjacent power distribution cycles exceeds the corresponding threshold value, judging that the specific loss analysis of the corresponding power distribution transformer is unqualified.
As a preferred embodiment of the present invention, in step four, statistics is performed according to historical operating faults of the distribution transformer, and the statistical historical fault sounds are analyzed, where a specific operation analysis process is as follows:
selecting historical operation time, attracting sound generated by the silicon steel sheet and the vibration of the transformer by electromagnetic force generated when alternating current passes through a coil when the distribution transformer normally operates in the historical operation time, marking the sound as normal operation starting sound, and counting sound data corresponding to the normal operation starting sound, wherein the sound data comprises tone, frequency and decibel; marking the sound generated by the distribution transformer running in real time as real-time running starting sound, if the sound factors corresponding to the real-time running starting sound and the normal running starting sound have difference values, judging that the distribution transformer runs in real time and starts to be abnormal, generating a running starting abnormal signal and sending the running starting abnormal signal to a mobile phone terminal of a corresponding distribution transformer manager;
when the distribution transformer runs in a fault in the historical running time, setting a sound generated when the distribution transformer runs in a fault to be a natural number k which is more than 1, collecting sound data of running sounds corresponding to faults of each distribution transformer, and marking the sound data as fault sound GZk; and marking the sound generated by the distribution transformer running in real time as real-time running process sound, comparing the real-time running process sound with the fault sound by sound data, if the real-time running process sound is consistent with the sound data of the fault sound, judging that the running process of the corresponding distribution transformer is abnormal, generating a process running fault signal, and sending the process running fault signal and the corresponding fault to a mobile phone terminal of a corresponding distribution transformer manager.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the real-time position of the distribution transformer is analyzed, so that whether the real-time position of the distribution transformer is qualified or not is ensured, the situation that the normal operation of the distribution transformer cannot be ensured accurately due to the installation position of the distribution transformer is prevented, the normal operation probability of the distribution transformer is directly reduced, and the timeliness of regional power supply is reduced; the method comprises the following steps of analyzing a distribution route of the environmental safety transformer, judging whether the distribution process of the environmental safety transformer is normal or not, reducing the problem that the environmental safety transformer cannot normally operate due to the abnormal distribution route, reducing the operation efficiency of the transformer, and simultaneously causing the interruption or delay of distribution so that the regional power supply cannot be guaranteed;
2. in the invention, the loss of the distribution transformer which runs in real time is analyzed, and the loss generated in the running process of the distribution transformer is judged to be monitored, so that whether the running of the distribution transformer has a fault or abnormal running is analyzed, the phenomenon that the distribution transformer continues to run when the distribution transformer has a fault is reduced, the equipment abrasion of the distribution transformer is increased, the service life of the distribution transformer is reduced, and the irreversible equipment loss is brought; the loss of the transformer is analyzed through two angles, so that the loss analysis accuracy of the transformer is higher, the change which is small in influence and actually exists in the transformer can be detected through the whole loss analysis, the change which is generated in real time in the transformer can be detected through the specific loss analysis, the real-time operation of the transformer is monitored in real time, and the operation protection efficiency of the transformer is improved;
3. according to the method, the faults in the historical operation of the distribution transformer are counted, the counted historical fault sounds are analyzed, and therefore the transformer which operates in real time is monitored through the fault sounds, the monitoring cost is low in a sound monitoring mode, the working strength is not large, meanwhile, the fault reliability which can be analyzed through sound is high, the fault monitoring in real time is facilitated, the fault monitoring is completed, meanwhile, the investment cost of monitoring can be reduced, and therefore the efficiency of transformer operation protection is indirectly improved.
Drawings
In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.
Fig. 1 is a flowchart of a method for operating protection of a distribution transformer based on loss comparison according to the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, an operation protection method for a distribution transformer based on loss comparison includes the following steps:
the method comprises the following steps of firstly, positioning analysis, namely analyzing the real-time position of a distribution transformer and judging whether the position of distribution transformation is qualified or not;
secondly, analyzing a route, namely analyzing the cable laying route of the distribution transformer with qualified position analysis so as to judge whether the operation of the distribution transformer is qualified;
analyzing and comparing the loss of the distribution transformer running in real time so as to judge whether the real-time running of the distribution transformer is abnormal or not;
analyzing operation, namely acquiring sounds corresponding to different operation faults according to historical operation of the distribution transformer, analyzing and marking the corresponding sounds, and detecting the real-time operation of the distribution transformer which operates in real time according to the sounds;
in the step one, carry out the analysis with distribution transformer's real-time position to guarantee whether qualified and safety of distribution transformer's real-time position, prevent that the position that distribution transformer installed from appearing can't accurately ensure its normal operating, directly reduced distribution transformer normal operating's probability, reduced the promptness of regional power supply simultaneously, concrete position analytic process is as follows:
collecting distribution transformers in each power utilization area, and setting a label i of the collected distribution transformers, wherein the label i is a natural number greater than 1; collecting the number of the residents around the distribution transformer and the number of the buildings around the distribution transformer, and respectively marking the number of the residents around the distribution transformer and the number of the buildings around the distribution transformer as JMi and SLi; collecting the number of monitoring cameras in the area where each distribution transformer is located, and marking the number of the monitoring cameras in the area where the distribution transformers are located as SXi;
by the formula
Acquiring position analysis coefficients Xi of each distribution transformer, wherein a1, a2 and a3 are preset proportionality coefficients, a1 is larger than a2 and larger than a3 and larger than 0, and beta is an error correction factor and takes the value of 1.23; the peripheral environment safety performance of the distribution transformer can be reflected by the number of the peripheral residents at the position of the distribution transformer, the number of the peripheral buildings and the number of the monitoring cameras, and the peripheral buildings are prevented from being too fewThe position is open and easy to be struck by lightning, and the number of residents and cameras is too small and easy to be stolen;
comparing the position analysis coefficient of each distribution transformer to a position analysis coefficient threshold:
if the position analysis coefficient of the distribution transformer is larger than or equal to the position analysis coefficient threshold value, judging that the position analysis of the corresponding distribution transformer is qualified, and marking the corresponding distribution transformer as an environment safety transformer; if the position analysis coefficient of the distribution transformer is smaller than the position analysis coefficient threshold value, judging that the position analysis of the corresponding distribution transformer is unqualified, marking the corresponding distribution transformer as an environment unsafe transformer, generating a transformer environment risk signal and sending the transformer environment risk signal to a mobile phone terminal of a manager;
and in the second step, the environmental safety transformer is subjected to distribution line analysis, so that whether the distribution process of the environmental safety transformer is normal or not is judged, abnormal operation of the environmental safety transformer caused by the distribution line is reduced, the operation efficiency of the transformer is reduced, and meanwhile, distribution interruption or delay is caused, so that regional power supply cannot be guaranteed, and the specific route analysis process is as follows:
collecting cable laying routes of the environment safety transformer in a corresponding area, marking the collected cable laying routes as power distribution routes, collecting a crosswind force value born by the power distribution route corresponding to the environment safety transformer and an average horizontal camber of the corresponding power distribution route, and respectively enabling the crosswind force value born by the power distribution route corresponding to the environment safety transformer and the average horizontal camber of the corresponding power distribution route to be respectively equal to a crosswind force value threshold value and an average horizontal camber threshold value, wherein the horizontal camber represents that a cable falls due to the increase of running time after the cable is laid, and an arc radian formed after the cable falls is represented as the route camber;
if the crosswind force value born by the power distribution line corresponding to the environmental safety transformer is larger than the crosswind force value threshold value, and the average horizontal camber of the corresponding power distribution line is larger than the average horizontal camber threshold value, judging that the corresponding power distribution line is unqualified, generating a line early warning signal, counting the number of the power distribution lines corresponding to the line early warning signal, if the number of the power distribution lines corresponding to the line early warning signal exceeds the corresponding number threshold value, judging that the power distribution line corresponding to the environmental safety transformer is abnormal, generating a line maintenance signal, and sending the line maintenance signal to a mobile phone terminal of a corresponding manager; if the crosswind force value born by the power distribution line corresponding to the environmental safety transformer is smaller than the crosswind force value threshold value, and the average horizontal camber of the corresponding power distribution line is smaller than the average horizontal camber threshold value, judging that the corresponding power distribution line is analyzed to be qualified, generating a line qualified signal, counting the number of the power distribution lines corresponding to the line qualified signal, if the number of the power distribution lines corresponding to the line qualified signal exceeds the corresponding number threshold value, judging that the power distribution line corresponding to the environmental safety transformer is normal, generating a line normal signal and sending the line normal signal to a mobile phone terminal of a corresponding manager;
in the third step, the distribution transformer which runs in real time is subjected to loss analysis, loss generated in the running process of the distribution transformer is judged to be monitored, and therefore whether failure or abnormal running exists in the running of the distribution transformer is analyzed, the distribution transformer is reduced to continue running when the distribution transformer fails, equipment abrasion of the distribution transformer is increased, the service life of the distribution transformer is shortened, irreversible equipment loss is brought at the same time, and the specific loss analysis process is as follows:
representing the completion of the power distribution transformer to the power distribution period, setting a real-time operation time threshold, acquiring the temperature and the electric quantity loss generated when the power distribution transformer starts to operate in the real-time operation time threshold, wherein o is a natural number greater than 3, and marking the temperature and the electric quantity loss generated when the power distribution transformer starts to operate in the power distribution period in the real-time operation time threshold as a first operation temperature and a first operation electric loss respectively; acquiring the temperature and the electric quantity loss generated during the operation of the last power distribution period within the real-time operation time threshold, and respectively marking the temperature and the electric quantity loss generated during the operation of the last power distribution period within the real-time operation time threshold as a last operation temperature and a last operation electric loss; obtaining an integral heat difference value by comparing the first operation temperature with the last operation temperature, and obtaining an integral electric loss difference value by comparing the first operation electric loss with the last operation electric loss; if the overall heat difference value and the overall electric loss difference value do not exceed the corresponding threshold values, judging that the overall loss analysis of the corresponding distribution transformer cabinet is qualified; if any value of the overall heat difference value and the overall electric loss difference value exceeds the corresponding threshold value, judging that the overall loss analysis of the corresponding distribution transformer cabinet is unqualified;
selecting two adjacent power distribution cycles within an operation time threshold, respectively acquiring a corresponding heat difference value and a corresponding electric loss difference value when the two adjacent power distribution cycles operate, respectively marking the corresponding heat difference value and the corresponding electric loss difference value when the two adjacent power distribution cycles operate as a specific heat difference value and a specific electric loss difference value, and judging that the specific loss analysis of the corresponding power distribution transformer is qualified if the specific heat difference value and the specific electric loss difference value when the two adjacent power distribution cycles operate do not exceed the corresponding threshold; if any value of the specific heat difference value and the specific electric loss difference value in the operation of two adjacent power distribution cycles exceeds the corresponding threshold value, judging that the specific loss analysis of the corresponding power distribution transformer is unqualified; the difference between the integral loss analysis and the concrete loss analysis in the application is that the integral loss analysis has natural influence factors such as running time and environmental temperature, the concrete loss analysis ignores the natural influence factors due to the length of the periodic interval, and analyzes the loss of the transformer through two angles, so that the loss analysis accuracy of the transformer is higher, meanwhile, the change which is small in influence and actually exists of the transformer can be detected through the integral loss analysis, the change which is generated in real time of the transformer can be detected through the concrete loss analysis, the real-time running transformer is monitored in real time, and the operation protection efficiency of the transformer is improved;
step four is according to the trouble of distribution transformer's historical operation and is makeed statistics of, and carry out the analysis with the historical fault sound of statistics, thereby monitor the transformer of real-time operation through fault sound, sound monitoring mode monitoring cost is low and working strength is little, fault reliability that simultaneously can pass through sound analysis is high, be favorable to the fault monitoring of real-time operation, and can reduce the input cost of monitoring when accomplishing fault monitoring, thereby the efficiency of transformer operation protection has been improved indirectly, concrete operation analytic process is as follows:
selecting historical operation time, attracting sound generated by the silicon steel sheet and the vibration of the transformer by electromagnetic force generated when alternating current passes through a coil when the distribution transformer normally operates in the historical operation time, marking the sound as normal operation starting sound, and counting sound data corresponding to the normal operation starting sound, wherein the sound data comprises tone, frequency and decibel; marking the sound generated by the distribution transformer running in real time as real-time running starting sound, if the sound factor corresponding to the real-time running starting sound and the normal running starting sound has a difference value, judging that the distribution transformer runs in real time and starts to be abnormal, generating a running starting abnormal signal and sending the running starting abnormal signal to a mobile phone terminal of a corresponding distribution transformer manager;
when the distribution transformer operates in a fault in historical operation time, setting a sound generation label k when the distribution transformer operates in a fault, wherein k is a natural number greater than 1, collecting sound data of operation sounds corresponding to faults of each distribution unit transformer, and marking the sound data as fault sound GZk; marking the sound generated by the distribution transformer running in real time as real-time running process sound, comparing the real-time running process sound with fault sound through sound data, if the real-time running process sound is consistent with the sound data of the fault sound, judging that the running process of the corresponding distribution transformer is abnormal, generating a process running fault signal, and sending the process running fault signal and the corresponding fault to a mobile phone terminal of a corresponding distribution transformer manager; the faults of the distribution transformer in the application include faults that a tap switch is not in place, the transformer is in overload operation, the transformer overhead line is grounded and the like, and the sound generated by the distribution transformer is different when the corresponding faults are generated.
The formulas are all obtained by acquiring a large amount of data and performing software simulation, and a formula close to a true value is selected, and coefficients in the formulas are set by a person skilled in the art according to actual conditions;
when the transformer is used, positioning analysis is carried out, the real-time position of the distribution transformer is analyzed, and whether the position of distribution transformation is qualified or not is judged; analyzing a route, namely analyzing a cable laying route of the distribution transformer with qualified position analysis so as to judge whether the operation of the distribution transformer is qualified or not; the loss analysis is carried out, namely loss of the distribution transformer running in real time is analyzed and compared in real time, so that whether the real-time running of the distribution transformer is abnormal or not is judged; and operation analysis, namely acquiring sounds corresponding to different operation faults according to historical operation of the distribution transformer, analyzing and marking the corresponding sounds, and performing real-time operation detection on the distribution transformer which operates in real time according to the sounds.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise forms 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 invention and the practical application, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (4)
1. An operation protection method for a distribution transformer based on loss comparison is characterized by comprising the following steps:
the method comprises the following steps of firstly, positioning analysis, namely analyzing the real-time position of a distribution transformer and judging whether the position of distribution transformation is qualified or not;
secondly, analyzing a route, namely analyzing the cable laying route of the distribution transformer with qualified position analysis so as to judge whether the operation of the distribution transformer is qualified;
analyzing and comparing the loss of the distribution transformer running in real time so as to judge whether the real-time running of the distribution transformer is abnormal or not; performing loss analysis on the distribution transformer which runs in real time, wherein the specific loss analysis process is as follows:
representing the completion of the power distribution transformer to the power distribution period, setting a real-time operation time threshold, acquiring the temperature and the electric quantity loss generated when the power distribution transformer starts to operate in the real-time operation time threshold, wherein o is a natural number greater than 3, and marking the temperature and the electric quantity loss generated when the power distribution transformer starts to operate in the power distribution period in the real-time operation time threshold as a first operation temperature and a first operation electric loss respectively; acquiring the temperature and the electric quantity loss generated during the operation of the last power distribution period within the real-time operation time threshold, and respectively marking the temperature and the electric quantity loss generated during the operation of the last power distribution period within the real-time operation time threshold as a last operation temperature and a last operation electric loss; obtaining an overall heat difference value by comparing the first operation temperature with the last operation temperature, and obtaining an overall electric loss difference value by comparing the first operation electric loss with the last operation electric loss; if the overall heat difference value and the overall electric loss difference value do not exceed the corresponding threshold values, judging that the overall loss analysis of the corresponding distribution transformer cabinet is qualified; if any value of the overall heat difference value and the overall electric loss difference value exceeds the corresponding threshold value, judging that the overall loss analysis of the corresponding distribution transformer cabinet is unqualified;
selecting two adjacent power distribution cycles within an operation time threshold, respectively acquiring a corresponding heat difference value and a corresponding electric loss difference value when the two adjacent power distribution cycles operate, respectively marking the corresponding heat difference value and the corresponding electric loss difference value when the two adjacent power distribution cycles operate as a specific heat difference value and a specific electric loss difference value, and judging that the specific loss analysis of the corresponding power distribution transformer is qualified if the specific heat difference value and the specific electric loss difference value when the two adjacent power distribution cycles operate do not exceed the corresponding threshold; if any value of the specific heat difference value and the specific electric loss difference value in the operation of two adjacent power distribution cycles exceeds the corresponding threshold value, judging that the specific loss analysis of the corresponding power distribution transformer is unqualified;
and step four, operation analysis is carried out, sounds corresponding to different operation faults are obtained according to historical operation of the distribution transformer, the corresponding sounds are analyzed and marked, and real-time operation detection is carried out on the distribution transformer which operates in real time according to the sounds.
2. The operation protection method for the distribution transformer based on loss comparison as claimed in claim 1, wherein in the first step, the real-time position of the distribution transformer is analyzed, and the specific position analysis process is as follows:
collecting distribution transformers in each power utilization area, and setting a label i of the collected distribution transformers, wherein i is a natural number greater than 1; collecting the number of the residents around the distribution transformer and the number of the buildings around the distribution transformer, and respectively marking the number of the residents around the distribution transformer and the number of the buildings around the distribution transformer as JMi and SLi; collecting the number of monitoring cameras in the area where each distribution transformer is located, and marking the number of the monitoring cameras in the area where the distribution transformers are located as SXi;
acquiring position analysis coefficients Xi of all distribution transformers through analysis; comparing the position analysis coefficient of each distribution transformer to a position analysis coefficient threshold:
if the position analysis coefficient of the distribution transformer is larger than or equal to the position analysis coefficient threshold value, judging that the position analysis of the corresponding distribution transformer is qualified, and marking the corresponding distribution transformer as an environment safety transformer; and if the position analysis coefficient of the distribution transformer is less than the position analysis coefficient threshold value, judging that the position analysis of the corresponding distribution transformer is unqualified, marking the corresponding distribution transformer as an environment unsafe transformer, generating a transformer environment risk signal and sending the transformer environment risk signal to a mobile phone terminal of a manager.
3. The operation protection method for the distribution transformer based on loss comparison as claimed in claim 1, wherein in the second step, the environmental safety transformer is subjected to distribution route analysis, and the specific route analysis process is as follows:
collecting cable laying routes of the environment safety transformer in the corresponding area, marking the collected cable laying routes as power distribution routes, collecting a cross wind force value born by the power distribution route corresponding to the environment safety transformer and an average horizontal camber of the corresponding power distribution route, and respectively enabling the cross wind force value born by the power distribution route corresponding to the environment safety transformer and the average horizontal camber of the corresponding power distribution route to be respectively equal to a cross wind force value threshold value and an average horizontal camber threshold value;
if the cross wind force value born by the power distribution line corresponding to the environmental safety transformer is larger than the cross wind force value threshold value, and the average level camber of the corresponding power distribution line is larger than the average level camber threshold value, judging that the corresponding power distribution line is unqualified, generating a line early warning signal, counting the number of the power distribution lines corresponding to the line early warning signal, if the number of the power distribution lines corresponding to the line early warning signal exceeds the corresponding number threshold value, judging that the power distribution line corresponding to the environmental safety transformer is abnormal, generating a line maintenance signal, and sending the line maintenance signal to a mobile phone terminal of a corresponding manager; if the crosswind force value born by the corresponding power distribution line of the environment safety transformer is smaller than the crosswind force value threshold value, and the average level camber of the corresponding power distribution line is smaller than the average level camber threshold value, the corresponding power distribution line is judged to be analyzed to be qualified, a line qualified signal is generated, the number of the power distribution lines corresponding to the line qualified signal is counted, if the number of the power distribution lines corresponding to the line qualified signal exceeds the corresponding number threshold value, the power distribution line corresponding to the environment safety transformer is judged to be normal, a line normal signal is generated, and the line normal signal is sent to a mobile phone terminal of a corresponding manager.
4. The operation protection method for the distribution transformer based on the loss comparison as claimed in claim 1, wherein in step four, statistics is performed according to the fault of the historical operation of the distribution transformer, and the statistical historical fault sound is analyzed, and the specific operation analysis process is as follows:
selecting historical operation time, attracting sound generated by the silicon steel sheet and the vibration of the transformer by electromagnetic force generated when alternating current passes through a coil when the distribution transformer normally operates in the historical operation time, marking the sound as normal operation starting sound, and counting sound data corresponding to the normal operation starting sound, wherein the sound data comprises tone, frequency and decibel; marking the sound generated by the distribution transformer running in real time as real-time running starting sound, if the sound factor corresponding to the real-time running starting sound and the normal running starting sound has a difference value, judging that the distribution transformer runs in real time and starts to be abnormal, generating a running starting abnormal signal and sending the running starting abnormal signal to a mobile phone terminal of a corresponding distribution transformer manager;
when the distribution transformer operates in a fault in historical operation time, setting a sound generation label k when the distribution transformer operates in a fault, wherein k is a natural number greater than 1, collecting sound data of operation sounds corresponding to faults of each distribution unit transformer, and marking the sound data as fault sound GZk; and marking the sound generated by the distribution transformer running in real time as real-time running process sound, comparing the real-time running process sound with the fault sound by sound data, if the real-time running process sound is consistent with the sound data of the fault sound, judging that the running process of the corresponding distribution transformer is abnormal, generating a process running fault signal, and sending the process running fault signal and the corresponding fault to a mobile phone terminal of a corresponding distribution transformer manager.
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| CN202111565533.0A CN114325495B (en) | 2021-12-20 | 2021-12-20 | Operation protection method for distribution transformer based on loss comparison |
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