CN116429200A - Box transformer and cable trench water level monitoring system and method - Google Patents
Box transformer and cable trench water level monitoring system and method Download PDFInfo
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Abstract
The invention belongs to the technical field of water level monitoring, in particular to a system and a method for monitoring water levels of box transformer and cable trenches, comprising the steps of monitoring the cable trenches of the box transformer and collecting data information of the cable trenches of the box transformer; the data information comprises the water level height, air humidity, water inflow and environmental temperature in the cable trench of the box transformer; acquiring water level data of a box transformer cable trench through data information; the water level data comprises the water level rising height in the unit time of the water level; when rainfall occurs, predicting the water level of the box transformer substation cable trench through the collected data information in the box transformer substation cable trench and the calculated water level influence factor of the box transformer substation cable trench; according to the water level of the box transformer cable trench, a predicted value is carried out, and a safety value of the box transformer cable trench is calculated; when the predicted water level is monitored to exceed the water level threshold, the box-type transformer substation cable trench is processed according to the predicted water level value and the safety value, and the real-time water level height, the air humidity, the water inflow, the environment temperature and the safety value of the ith box-type transformer substation cable trench are displayed in real time.
Description
Technical Field
The invention belongs to the technical field of water level monitoring, and particularly relates to a system and a method for monitoring water levels of box transformer and cable ditches.
Background
Along with the continuous development of social economy, the living standard of people is improved to a great extent, and the living standard of people directly influences the requirement for power supply, so that the normal operation of a transformer substation can be ensured to the greatest extent to ensure the requirement of people for power, but the transformer substation can encounter various problems during working, besides the equipment failure problem of the transformer substation, and the influence of accumulated water. At present, when a commonly used transformer substation is a box-type transformer substation and encounters rainwater, if a cable trench cover plate is not tightly sealed, water accumulation occurs at the bottom of the box-type transformer substation, the internal humidity is increased, so that power supply equipment such as a cable connector, a switch knife switch and a transformer is subjected to condensation, equipment aging is caused, a phenomenon of water branches occurs when the cable is soaked in water, insulation is reduced, the cable is possibly broken down finally, so that the accumulated water of each box-type transformer substation is required to be checked after heavy rain each time, and manual checking of the accumulated water of the box-type transformer substation is time-consuming and labor-consuming.
Disclosure of Invention
The invention aims to provide a box transformer and cable pit water level monitoring system and method for solving the problems in the background technology.
In order to solve the technical problems, the invention provides the following technical scheme: the method for monitoring the water level of the box transformer and the cable trench comprises the following steps:
step S100: monitoring the box transformer cable trench and collecting data information of the box transformer cable trench; the data information comprises the water level height, air humidity, water inflow and environmental temperature in the cable trench of the box transformer; acquiring water level data of a box transformer cable trench through data information; the water level data comprises the water level rising height in unit time;
step S200: when rainfall occurs, predicting the water level of the box transformer substation cable trench through collecting data information in the box transformer substation cable trench;
step S300: according to the predicted value of the water level height of the box transformer cable trench, calculating the safety value of the box transformer cable trench;
step S400: and when the predicted water level is monitored to exceed the water level threshold, processing the box-type transformer substation cable trench according to the predicted water level value and the safety value.
Further, step S100 includes:
step S101: the water level of the ith box-type power cable channel is monitored in a monitoring period in unit time every interval, and the collected water level is recorded and collected to obtain a set H= { H i1 ,H i2 ，...,H if }, wherein H i1 ,H i2 ，...,H if The method comprises the steps of respectively representing the water level height data collected in the 1 st, 2 nd and f th unit time of an i-th box transformer cable trench, screening a collected water level height set H, and eliminating the water level height being smaller than a water level height detection threshold value to obtain the set H z ＝{H i1 ,H i2 ，...,H ir -a }; wherein H is i1 ,H i2 ，...,H ir Respectively represent the set H z The first and second water level detection thresholds are set in the first and second water level detection channels, wherein the first water level detection threshold is equal to the second water level detection threshold;
step S102: will set H z Sequentially making differences on the water level heights of the i-th box-transformer cable trenches to obtain a plurality of water level change height data corresponding to the i-th box-transformer cable trenches, and recording and collecting the water level change heights of the i-th box-transformer cable trenches to obtain a set L= { L i1 ,L i2 ，...,L in }, wherein L i1 ,L i2 ...,L in The water level change values of the 1 st, 2 nd and n th box-change cable tray are respectively shown.
Further, step S200 includes:
step S201: calculating a water level height correlation value D of an ith box-type transformer cable trench i ：
Wherein L is ix The change value of the height of the water level of the ith box-type transformer cable trench is the x-th change value of the height of the water level of the ith box-type transformer cable trench; n is the number of water level height changes of the ith box-type transformer substation cable trench in the collection L; x is L in the set L ix The corresponding number of water level height changes;
step S202: when rainfall occurs, the ith box-type transformer substation cable pit is calculated through analysisThe water level H not expected to be reached at the jth unit time ij ：
H ij ＝D i ×μ×H ij-1 +H ij-1 ；
Wherein H is ij-1 The water level height of the ith box-type transformer cable trench in the jth unit time is not found; mu is a rainfall influence factor obtained by collecting the air pressure zone and the latitude position of the place where the ith box-type cable trench is located and analyzing the local rainfall through topography;
in the step, the water level influence factor D of the ith box-type transformer cable trench is calculated through the water level rising height of the ith box-type transformer cable trench in unit time i Because if the water level of the box-type transformer cable trench is recorded to be higher, the more the water level is increased, the place where the box-type transformer cable trench is located is frequently subjected to rainfall, and the water level H expected to be reached by the ith box-type transformer cable trench at the end of the jth unit time is predicted ij Is prepared for the rising of the water level in advance, and avoids influencing the cable trench of the box transformer.
Further, step S300 includes:
step S301: randomly selecting n positions in an ith box transformer substation cable trench to acquire air humidity, recording and collecting the acquired n air humidity values to obtain a set P= { P i1 ,P i2 ，...,P in -a }; wherein P is i1 ,P i2 ，...,P in Air humidity values of 1 st, 2 nd, n th random positions in the i-th box transformer cable duct are taken as P i1 ,P i2 ，...,P in Median P it Air humidity test value P for ith box-section cable duct it For P in the collection P i1 ,P i2 ，...,P in Screening, P in collection P i1 ,P i2 ，...,P in With air humidity test value P it Taking absolute value as difference, and eliminating air humidity with absolute value greater than air humidity test threshold to obtain set P io Calculate set P io Average value to obtain air humidity P in ith box-type transformer cable trench i ；
Step S302: for the ith box-transformer cable trenchThe j-th water level height H expected to be reached at the end of unit time ij Humidity of air P i Ambient temperature T i Respectively performing normalization processing, performing linear transformation on the original data, and mapping the data to [0,1 ]]Between them; obtaining the water level height H i Normalized mapping value H gij Obtaining the air humidity P i Normalized mapping value P gi The method comprises the steps of carrying out a first treatment on the surface of the Obtaining the ambient temperature T i Normalized mapping value T gi ；
Step S303: calculating the safety value Q of the ith box-type transformer cable trench i ：
Q i ＝β×P gi +γ×T gi +ε×H gij ；
Wherein beta is P i Is a factor of influence of (a); gamma is T i Is a factor of influence of (a); epsilon is H i Is a factor of influence of (a);
the safety value of the box transformer cable trench is calculated through the water level height, the air humidity and the environmental temperature of the box transformer cable trench, and is because the box transformer cable trench can be used or not when in work, the three factors of the water level, the air humidity and the environmental temperature in the box transformer cable trench are greatly dependent on, for example, the phenomenon that the water tree phenomenon can appear when a cable passes through the water, insulation is reduced, the cable can possibly break down finally, the continuous high temperature can increase the working pressure of the cable, the working performance of the cable can be damaged when the cable temperature is continuously overhigh, insulation breakdown phenomenon easily appears, the insulating layer of the cable can be damaged after the phenomenon happens, short circuit is easy to occur between other cables, power supply faults such as tripping can be caused, normal transmission of electric power can not be guaranteed, the internal insulation resistance can be reduced due to overlarge air humidity of the box transformer cable trench, the leakage current of equipment can be greatly increased, and even insulation breakdown can be caused.
Further, step S400 includes:
step S401: when the calculated height H of the water level of the ith box-type transformer cable trench which is not expected to be reached in the jth unit time ij When the water level height threshold value of the box-type cable pit is larger than the water level height threshold value of the box-type cable pit, the ith box-type transformer is processed; when the safety value of the ith box-type transformer cable trenchQ i Opening an automatic drainage device to drain the ith box-type cable pit when the safety value of the box-type cable pit is smaller than the minimum threshold value of the safety value of the box-type cable pit; when the safety value Q of the ith box-type transformer cable trench i When the safety value of the box-type transformer substation cable pit is larger than the minimum threshold value and smaller than the maximum threshold value of the safety value, opening the automatic drainage device, draining the ith box-type transformer substation cable pit, and sending out an alarm to remind workers of processing; when the safety value Q of the ith box-type transformer cable trench i When the safety value of the box-type transformer substation cable pit is larger than the maximum threshold value of the safety value of the box-type transformer substation cable pit, an automatic drainage device is opened to drain the ith box-type transformer substation cable pit, power supply to the ith box-type transformer substation is cut off, an alarm is sent, and workers are reminded of processing;
step S402: when the automatic drainage device is opened, draining the box-type cable trench, wherein the water level of the box-type cable trench does not drop; acquiring the heights of a water surface sensor and a wellhead sensor in a water collecting well of the box transformer substation cable trench, when the heights are smaller than a height threshold value, indicating that the water collecting capacity of the water collecting well of the box transformer substation cable trench is reduced, giving an abnormal alarm, prompting a worker, and prompting the worker to process the water collecting well of the box transformer substation cable trench;
step S403: displaying the real-time water level height, air humidity, water inflow, environment temperature and safety value of the ith box-type transformer cable trench in real time;
in the above step, when the predicted water level of the box-type transformer cable trench is greater than the water level, the box-type transformer cable trench is drained, because the cable line in the box-type transformer cable trench is submerged due to the higher water level, and drainage is needed; the box transformer cable trench is processed according to the difference of the safety values of the box transformer cable trench, and the grading processing enables the water level condition processing of the box transformer cable trench to be more practical.
In order to better realize the method, a box transformer and cable trench water level monitoring system is also provided, wherein the monitoring system comprises a monitoring module, a water level prediction module, a safety module and a processing module;
the monitoring module is used for monitoring the box transformer substation cable trench and collecting data information of the box transformer substation cable trench; the data information comprises the water level height, air humidity, water inflow and environmental temperature in the cable trench of the box transformer;
the water level prediction module is used for predicting the water level of the box transformer cable trench;
the safety module is used for calculating the safety value of the cable trench of the box transformer;
and the processing module is used for processing the box-type cable pit pair and processing the box-type cable pit according to the predicted water level and the predicted safety value.
Further, the monitoring module comprises a data acquisition unit and a data processing unit:
the data acquisition unit is used for monitoring the ith box transformer cable trench and acquiring the water level height H of the ith box transformer cable trench i Humidity of air P i Ambient temperature T i ；
The data processing unit is used for processing the acquired data, recording and collecting the water level rising heights in n unit time to obtain a set L= { L i1 ,L i2 ，...,L in }。
Further, the water level prediction module includes a water level calculation unit:
a water level calculating unit for relating the water level height of the ith box-type transformer cable trench to a value D i Calculating the water level H of the ith box-type transformer cable trench at the end of the jth unit time according to the calculated water level influence factor ij 。
Further, the security module includes a data processing unit, a security value calculating unit:
a safety value data processing unit for predicting the water level H reached by the ith box-type transformer cable trench at the end of the jth unit time ij Humidity of air P i Ambient temperature T i Respectively performing normalization processing, performing linear transformation on the original data, and mapping the data to [0,1 ]]Between them;
and the safety value calculation unit is used for calculating the safety value of the ith box-transformer cable trench at the end of the jth unit time.
Further, the processing module comprises a processing unit and a display unit:
the processing unit is used for processing the ith box-type transformer cable trench, and when the water level of the ith box-type transformer cable trench exceeds the threshold value according to the ith box-type transformer cable trench, the ith box-type transformer cable trench is processed according to the relation between the safety value and the safety value threshold value of the ith box-type transformer cable trench;
the display unit is used for displaying the real-time water level height, the air humidity, the water inflow, the ambient temperature and the safety value of the ith box transformer cable ditch in real time.
Compared with the prior art, the invention has the following beneficial effects: the invention monitors the ith box transformer cable trench and collects the water level height H of the ith box transformer cable trench i Humidity of air P i Ambient temperature T i Because the box-type transformer cable trench can use three factors which are greatly dependent on the water level, the air humidity and the environmental temperature in the box-type transformer cable trench when in work, the water level influence factor D of the i-th box-type transformer cable trench is calculated through the water level rising height of the i-th box-type transformer cable trench in unit time i The case-change cable ditch is processed in a grading manner, so that the water level condition processing of the case-change cable ditch is more practical.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:
FIG. 1 is a flow chart of a method of the tank transformer and cable pit water level monitoring system and method of the present invention;
FIG. 2 is a system block diagram of the tank transformer and cable pit water level monitoring system and method of the present invention.
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. 1-2, the present invention provides the following technical solutions: the box transformer and cable pit water level monitoring method is characterized by comprising the following steps:
step S100: monitoring the box transformer cable trench and collecting data information of the box transformer cable trench; the data information comprises the water level height, air humidity, water inflow and environmental temperature in the cable trench of the box transformer; acquiring water level data of a box transformer cable trench through data information; the water level data comprises the water level rising height in unit time;
wherein, step S100 includes:
step S101: the water level of the ith box-type power cable channel is monitored in a monitoring period in unit time every interval, and the collected water level is recorded and collected to obtain a set H= { H i1 ,H i2 ，...,H if }, wherein H i1 ,H i2 ，...,H if The method comprises the steps of respectively representing the water level height data collected in the 1 st, 2 nd and f th unit time of an i-th box transformer cable trench, screening a collected water level height set H, and eliminating the water level height being smaller than a water level height detection threshold value to obtain the set H z ＝{H i1 ,H i2 ，...,H ir -a }; wherein H is i1 ,H i2 ，...,H ir Respectively represent the set H z The first and second water level detection thresholds are set in the first and second water level detection channels, wherein the first water level detection threshold is equal to the second water level detection threshold;
step S102: will set H z Sequentially making differences on the water level heights of the i-th box-transformer cable trenches to obtain a plurality of water level change height data corresponding to the i-th box-transformer cable trenches, and recording and collecting the water level change heights of the i-th box-transformer cable trenches to obtain a set L= { L i1 ,L i2 ，...,L in }, wherein L i1 ,L i2 ...,L in The water level height change values of the i-th box-transformer cable ditches are respectively shown in the 1 st, the 2 nd;
step S200: when rainfall occurs, predicting the water level of the box transformer substation cable trench through collecting data information in the box transformer substation cable trench;
wherein, step S200 includes:
step S201: calculating a water level height correlation value D of an ith box-type transformer cable trench i ：
Wherein L is ix The change value of the height of the water level of the ith box-type transformer cable trench is the x-th change value of the height of the water level of the ith box-type transformer cable trench; n is the number of water level height changes of the ith box-type transformer substation cable trench in the collection L; x is L in the set L ix The corresponding number of water level height changes;
step S202: when rainfall occurs, the water level H which is not expected to be reached by the ith box-type transformer cable trench in the jth unit time is calculated through analysis ij ：
H ij ＝D i ×μ×H ij-1 +H ij-1 ；
Wherein H is ij-1 The water level height of the ith box-type transformer cable trench in the jth unit time is not found; mu is a rainfall influence factor obtained by collecting the air pressure zone and the latitude position of the place where the ith box-type cable trench is located and analyzing the local rainfall by the topography
Step S300: according to the predicted value of the water level height of the box transformer cable trench, calculating the safety value of the box transformer cable trench;
wherein, step S300 includes:
step S301: randomly selecting n positions in an ith box transformer substation cable trench to acquire air humidity, recording and collecting the acquired n air humidity values to obtain a set P= { P i1 ,P i2 ，...,P in -a }; wherein P is i1 ,P i2 ，...,P in Air humidity values of 1 st, 2 nd, n th random positions in the i-th box transformer cable duct are taken as P i1 ,P i2 ，...,P in Median P it Air humidity test value P for ith box-section cable duct it For P in the collection P i1 ,P i2 ，...,P in Screening, P in collection P i1 ,P i2 ，...,P in With air humidity test value P it Taking absolute value as difference, and eliminating air humidity with absolute value greater than air humidity test threshold to obtain set P io Calculate set P io Average value to obtain air humidity P in ith box-type transformer cable trench i ；
Step S302: for the water level H expected to be reached by the ith box-type transformer cable trench at the end of the jth unit time ij Humidity of air P i Ambient temperature T i Respectively performing normalization processing, performing linear transformation on the original data, and mapping the data to [0,1 ]]Between them; obtaining the water level height H i Normalized mapping value H gij Obtaining the air humidity P i Normalized mapping value P gi The method comprises the steps of carrying out a first treatment on the surface of the Obtaining the ambient temperature T i Normalized mapping value T gi ；
Step S303: calculating the safety value Q of the ith box-type transformer cable trench i ：
Q i ＝β×P gi +γ×T gi +ε×H gij ；
Wherein beta is P i Is a factor of influence of (a); gamma is T i Is a factor of influence of (a); epsilon is H i Is a factor of influence of (a);
for example, the 3 rd tank change cable pit has a mapping value H of the height of the water level expected to be reached at the end of the 3 rd unit time g33 Map value P for 0.7, air humidity normalization g3 Is 0.6, the mapping value T after the normalization treatment of the ambient temperature g3 0.4; beta is 0.4; gamma is 0.5; epsilon is 0.7; safety value Q of 3 rd box-type transformer cable pit 3 ＝0.4×0.6+0.5×0.4+0.7×0.7＝0.93；
Step S400: when the predicted water level is monitored to exceed the water level threshold, processing the box-type transformer substation cable trench according to the predicted water level value and the safety value;
wherein, step S400 includes:
step S401: when the calculated height H of the water level of the ith box-type transformer cable trench which is not expected to be reached in the jth unit time ij When the water level height threshold value of the box-type cable trench is larger than the water level height threshold value of the box-type cable trench, the ith box-type transformer is started to be processedThe method comprises the steps of carrying out a first treatment on the surface of the When the safety value Q of the ith box-type transformer cable trench i Opening an automatic drainage device to drain the ith box-type cable pit when the safety value of the box-type cable pit is smaller than the minimum threshold value of the safety value of the box-type cable pit; when the safety value Q of the ith box-type transformer cable trench i When the safety value of the box-type transformer substation cable pit is larger than the minimum threshold value and smaller than the maximum threshold value of the safety value, opening the automatic drainage device, draining the ith box-type transformer substation cable pit, and sending out an alarm to remind workers of processing; when the safety value Q of the ith box-type transformer cable trench i When the safety value of the box-type transformer substation cable pit is larger than the maximum threshold value of the safety value of the box-type transformer substation cable pit, an automatic drainage device is opened to drain the ith box-type transformer substation cable pit, power supply to the ith box-type transformer substation is cut off, an alarm is sent, and workers are reminded of processing;
step S402: when the automatic drainage device is opened, draining the box-type cable trench, wherein the water level of the box-type cable trench does not drop; acquiring the heights of a water surface sensor and a wellhead sensor in a water collecting well of the box transformer substation cable trench, when the heights are smaller than a height threshold value, indicating that the water collecting capacity of the water collecting well of the box transformer substation cable trench is reduced, giving an abnormal alarm, prompting a worker, and prompting the worker to process the water collecting well of the box transformer substation cable trench;
step S403: displaying the real-time water level height, air humidity, water inflow, environment temperature and safety value of the ith box-type transformer cable trench in real time;
in order to better realize the method, a box transformer and cable trench water level monitoring system is also provided, wherein the monitoring system comprises a monitoring module, a water level prediction module, a safety module and a processing module;
the monitoring module is used for monitoring the box transformer substation cable trench and collecting data information of the box transformer substation cable trench; the data information comprises the water level height, air humidity, water inflow and environmental temperature in the cable trench of the box transformer;
the water level prediction module is used for predicting the water level of the box transformer cable trench;
the safety module is used for calculating the safety value of the cable trench of the box transformer;
and the processing module is used for processing the box-type cable pit pair and processing the box-type cable pit according to the predicted water level and the predicted safety value.
The monitoring module comprises a data acquisition unit and a data processing unit:
the data acquisition unit is used for monitoring the ith box transformer cable trench and acquiring the water level height H of the ith box transformer cable trench i Humidity of air P i Ambient temperature T i ；
The data processing unit is used for processing the acquired data, recording and collecting the water level rising heights in n unit time to obtain a set L= { L i1 ,L i2 ，...,L in }；
Wherein, the water level prediction module includes a water level calculation unit:
a water level calculating unit for relating the water level height of the ith box-type transformer cable trench to a value D i Calculating the water level H of the ith box-type transformer cable trench at the end of the jth unit time according to the calculated water level influence factor ij ；
The security module comprises a data processing unit and a security value calculating unit:
a safety value data processing unit for predicting the water level H reached by the ith box-type transformer cable trench at the end of the jth unit time ij Humidity of air P i Ambient temperature T i Respectively performing normalization processing, performing linear transformation on the original data, and mapping the data to [0,1 ]]Between them;
the safety value calculation unit is used for calculating the safety value of the ith box-type transformer cable trench at the end of the jth unit time;
the processing module comprises a processing unit and a display unit:
the processing unit is used for processing the ith box-type transformer cable trench, and when the water level of the ith box-type transformer cable trench exceeds the threshold value according to the ith box-type transformer cable trench, the ith box-type transformer cable trench is processed according to the relation between the safety value and the safety value threshold value of the ith box-type transformer cable trench;
the display unit is used for displaying the real-time water level height, the air humidity, the water inflow, the ambient temperature and the safety value of the ith box transformer cable ditch in real time.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present invention, and the present invention is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present invention has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The box transformer and cable pit water level monitoring method is characterized by comprising the following steps:
step S100: monitoring a box transformer cable trench and collecting data information of the box transformer cable trench; the data information comprises the water level height, the air humidity, the water inflow and the environmental temperature in the box transformer cable trench; acquiring water level data of the box-type cable pit through the data information; the water level data comprises a water level rising height in unit time;
step S200: when rainfall occurs, predicting the water level of the box transformer substation cable trench through collecting data information in the box transformer substation cable trench;
step S300: according to the predicted value of the water level height of the box-type transformer cable trench, calculating the safety value of the box-type transformer cable trench;
step S400: and when the predicted water level is monitored to exceed the water level threshold, processing the box-type transformer cable trench according to the predicted water level value and the safety value.
2. The method for monitoring the water level of the tank transformer and the cable pit according to claim 1, wherein the step S100 includes:
step S101: the method comprises the steps of monitoring the water level of an ith box-type power cable trench in a monitoring period at intervals, recording and collecting the collected water level to obtain a set H= { H i1 ，H i2 ，...，H if }, wherein H i1 ，H i2 ，...，H if The method comprises the steps of respectively representing the water level height data collected in the 1 st, 2 nd and f th unit time of an i-th box transformer cable trench, screening a collected water level height set H, and eliminating the water level height being smaller than a water level height detection threshold value to obtain the set H z ＝{H i1 ，H i2 ，...，H ir -a }; wherein H is i1 ，H i2 ，...，H ir Respectively represent the set H z The first and second water level detection thresholds are set in the first and second water level detection channels, wherein the first water level detection threshold is equal to the second water level detection threshold;
step S102: will set H z Sequentially making differences on the water level heights of the i-th box-transformer cable trench to obtain a plurality of water level change height data corresponding to the i-th box-transformer cable trench, and recording and collecting the water level change heights of the i-th box-transformer cable trench to obtain a set L= { L i1 ，L i2 ，...，L in }, wherein L i1 ，L i2 ...，L in And the water level height change values of the ith box-section cable duct are respectively shown as 1 st, 2 nd.
3. The method for monitoring the water level of the tank transformer and the cable pit according to claim 2, wherein the step S200 includes:
step S201: calculating a water level height correlation value D of an ith box-type transformer cable trench i ：
Wherein L is ix The value of the variation of the height of the x water level of the ith box-type transformer cable trench in the collection L; n is the number of water level height changes of the ith box-type transformer cable trench in the collection L; x is L in the set L ix The corresponding number of water level height changes;
step S202: when rainfall occurs, calculating the unexpected water level H of the ith box-type transformer cable trench in the jth unit time through analysis ij ：
H ij ＝D i ×μ×H ij-1 +H ij-1 ；
Wherein H is ij-1 The water level height of the ith box-type transformer cable trench in the jth unit time is the same as the water level height of the ith box-type transformer cable trench in the jth unit time; mu is a rainfall influence factor obtained by collecting the air pressure zone and the latitude position of the place where the ith box-type cable trench is located and analyzing the local rainfall through the topography.
4. A tank transformer and cable pit water level monitoring method according to claim 3, wherein said step S300 comprises:
step S301: randomly selecting n positions in an ith box transformer substation cable trench to acquire air humidity, recording and collecting the acquired n air humidity values to obtain a set P= { P i1 ，P i2 ，...，P in -a }; wherein P is i1 ，P i2 ，...，P in And taking P from the air humidity values of the 1 st, 2 nd, and n random positions in the ith box-type transformer cable trench respectively i1 ，P i2 ，...，P in Median P it Air humidity test value P for the ith box-section cable duct it For P in the collection P i1 ，P i2 ，...，P in Screening, P in collection P i1 ，P i2 ，...，P in And the air humidity test value P it Taking absolute value of the difference, and eliminating the air humidity with the absolute value larger than the air humidity detection threshold value to obtain a set P io Calculate set P io Average value, obtain the i-th box transformer cable trenchIs the air humidity P of (2) i ；
Step S302: for the water level H expected to be reached by the ith box-type transformer cable trench at the end of the jth unit time ij Humidity of air P i Ambient temperature T i Respectively performing normalization processing, performing linear transformation on the original data, and mapping the data to [0,1 ]]Between them; obtaining the water level height H i Normalized mapping value H gij Obtaining the air humidity P i Normalized mapping value P gi The method comprises the steps of carrying out a first treatment on the surface of the Obtaining the ambient temperature T i Normalized mapping value T gi ；
Step S303: calculating the safety value Q of the ith box-type transformer substation cable trench i ：
Q i ＝β×P gi +γ×T gi +ε×H gij ；
Wherein beta is P i Is a factor of influence of (a); gamma is T i Is a factor of influence of (a); epsilon is H i Is a factor of influence of (a).
5. The method for monitoring the water level in a tank transformer and a cable pit according to claim 4, wherein the step S400 includes:
step S401: when the calculated water level H of the ith box-section cable duct which is not expected to be reached in the jth unit time ij When the water level height threshold value of the box-type cable pit is larger than the water level height threshold value of the box-type cable pit, the ith box-type cable pit is processed; when the safety value Q of the ith box-type transformer cable trench i Opening an automatic drainage device to drain the ith box-type cable pit when the safety value of the box-type cable pit is smaller than the minimum threshold value of the safety value of the box-type cable pit; when the safety value Q of the ith box-type transformer cable trench i When the safety value of the box-type transformer substation cable pit is larger than the minimum threshold value and smaller than the maximum threshold value of the safety value, an automatic drainage device is opened, the ith box-type transformer substation cable pit is drained, and an alarm is sent to remind workers of processing; when the safety value Q of the ith box-type transformer cable trench i When the safety value of the box-type transformer substation cable pit is larger than the maximum threshold value of the safety value of the box-type transformer substation cable pit, an automatic drainage device is opened to drain the ith box-type transformer substation cable pit, power supply to the ith box-type transformer substation is cut off, an alarm is sent out, and reminding is carried outProcessing by staff;
step S402: when the automatic drainage device is opened, the box-type cable trench is drained, and the water level of the box-type cable trench is not lowered; acquiring the heights of a water surface sensor and a wellhead sensor in a water collecting well of a box transformer cable trench, and when the heights are smaller than a height threshold value, indicating that the water collecting capacity of the water collecting well of the box transformer cable trench is reduced, sending an abnormal alarm, prompting a worker, and prompting the worker to process the water collecting well of the box transformer cable trench;
step S403: and displaying the real-time water level height, the air humidity, the water inflow, the environment temperature and the safety value of the ith box-type transformer cable duct in real time.
6. A box transformer and cable pit water level monitoring system applied to the box transformer and cable pit water level monitoring method in any one of claims 1-5, wherein the monitoring system comprises a monitoring module, a water level prediction module, a safety module and a processing module;
the monitoring module is used for monitoring the box transformer substation cable trench and collecting data information of the box transformer substation cable trench; the data information comprises the water level height, the air humidity, the water inflow and the environmental temperature in the box transformer cable trench;
the water level prediction module is used for predicting the water level of the cable trench of the box transformer substation;
the safety module is used for calculating the safety value of the box transformer cable trench;
and the processing module is used for processing the box-type cable pit pair and processing the box-type cable pit according to the predicted water level and the predicted safety value.
7. The tank transformer and cable pit water level monitoring system of claim 6, wherein the monitoring module comprises a data acquisition unit and a data processing unit;
the data acquisition unit is used for monitoring the ith box-type transformer cable trench and acquiring the water level height H of the ith box-type transformer cable trench i Humidity of air P i Ambient temperature T i ；
The data processing unit is used for processing the collected data, recording and collecting the water level rising heights in n unit time to obtain a set L= { L i1 ，L i2 ，...，L in }。
8. The tank transformer and cable pit water level monitoring system of claim 6, wherein the water level prediction module comprises a water level calculation unit;
the water level calculating unit is used for relating the water level height of the ith box-type transformer cable trench to a value D i Calculating a water level height H not expected to be reached in the jth unit time according to the calculated water level influence factor ij 。
9. The tank transformer and cable pit water level monitoring system of claim 6, wherein the security module comprises a data processing unit, a security value calculation unit;
the safety value data processing unit is used for controlling the water level height H of the ith box-type transformer cable trench which is not expected to be reached in the jth unit time ij Humidity of air P i Ambient temperature T i Respectively performing normalization processing, performing linear transformation on the original data, and mapping the data to [0,1 ]]Between them;
and the safety value calculation unit is used for calculating the safety value of the ith box-type transformer cable trench in the jth unit time.
10. The tank transformer and cable pit water level monitoring system of claim 6, wherein the processing module comprises a processing unit, a display unit;
the processing unit is used for processing the ith box-type cable duct, and when the water level of the ith box-type cable duct exceeds the threshold value according to the ith box-type cable duct, the processing unit is used for processing the ith box-type cable duct according to the relation between the safety value and the safety value threshold value of the ith box-type cable duct;
the display unit is used for displaying the real-time water level height, the air humidity, the water inflow, the ambient temperature and the safety value of the ith box transformer cable trench in real time.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310054803.4A CN116429200A (en) | 2023-02-03 | 2023-02-03 | Box transformer and cable trench water level monitoring system and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310054803.4A CN116429200A (en) | 2023-02-03 | 2023-02-03 | Box transformer and cable trench water level monitoring system and method |
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