CN114399116A - Flood prevention method for transformer substation - Google Patents

Flood prevention method for transformer substation Download PDF

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CN114399116A
CN114399116A CN202210051044.1A CN202210051044A CN114399116A CN 114399116 A CN114399116 A CN 114399116A CN 202210051044 A CN202210051044 A CN 202210051044A CN 114399116 A CN114399116 A CN 114399116A
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water
time period
collecting well
water collecting
flood prevention
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杨磊
刘枫琪
高阳
商兵兵
苑司坤
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Henan Jiuyu Enpai Power Technology Co Ltd
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Abstract

The invention discloses a transformer substation flood prevention method and relates to the technical field of transformer substation flood prevention. The method comprises the following steps: acquiring water level information of a water collecting well and drainage flow information of a drainage system in a preset time period; determining inflow flow information of the water collecting well in a preset time period according to water level information of the water collecting well in the preset time period and drainage flow information of a drainage system; predicting inflow water flow information of the water collecting well in a target time period by adopting a prediction algorithm based on inflow water flow information of the water collecting well in a preset time period, wherein the starting time of the target time period is later than the ending time of the preset time period; and generating flood prevention information according to the water inlet flow information of the water collecting well in the target time period. The method can predict the inflow water flow information in the target time period of the water collecting well, and flood prevention information is generated according to the inflow water flow information, and the flood prevention information can be used for informing workers of the time when danger occurs or prompting or controlling the opening and closing of a drainage system.

Description

Flood prevention method for transformer substation
Technical Field
The invention relates to the technical field of transformer substation flood prevention, in particular to a transformer substation flood prevention method.
Background
In a substation, the sump well is at the lowest point of the entire substation. When the rainy season comes, water in the transformer substation flows into the water collecting well. When the water level of the water collecting well reaches a certain height, the drainage pump is used for draining accumulated water in the water collecting well, so that electric equipment in the transformer substation is prevented from being submerged by rainwater and breaking down.
At present, intelligent flood prevention systems are installed in some transformer substations, and based on the technology of internet of things sensors and the automation technology, the intelligent flood prevention systems can intelligently monitor the water level of a water collecting well in the transformer substation, control a drainage pump to drain water when the water level reaches a drainage water level (preset value), and give an alarm when the water level exceeds a warning line (preset value). The existing intelligent flood prevention system has the following problems:
firstly, the intelligent flood prevention system cannot give an early warning to the time of danger occurrence, so that the staff cannot judge whether the emergency repair task is urgent or urgent according to early warning information.
And secondly, the water level of the intelligent flood prevention system is a fixed value, when the rainfall is large, the water level reaches the fixed value, the water drainage system is controlled to drain water, and the danger that the water level of the water collecting well exceeds a warning line due to untimely drainage occurs, so that the electric power equipment is damaged due to flooding.
Therefore, a method for flood prevention of a transformer substation is urgently needed to be found, and at least one of the two problems can be solved.
Disclosure of Invention
The invention aims to provide a transformer substation flood prevention method which can predict inflow information in a target time period of a water collecting well and generate flood prevention information according to the inflow information, wherein the flood prevention information can be used for informing workers of the time when danger occurs or prompting or controlling the opening and closing of a drainage system.
In order to achieve the above purpose, the invention provides the following technical scheme: a flood prevention method for a transformer substation comprises the following steps:
acquiring water level information of a water collecting well and drainage flow information of a drainage system in a preset time period;
determining water inlet flow information of the water collecting well in the preset time period according to the water level information of the water collecting well in the preset time period and the drainage flow information of the drainage system;
predicting the water inlet flow information of the water collecting well in a target time period by adopting a prediction algorithm based on the water inlet flow information of the water collecting well in the preset time period, wherein the starting time of the target time period is later than the ending time of the preset time period;
and generating flood prevention information according to the water inlet flow information of the water collecting well in the target time period.
Optionally, the preset time period and the target time period each include a plurality of time periods; the determining, according to the water level information of the water collecting well in the preset time period and the drainage flow information of the drainage system, the inflow flow information of the water collecting well in the preset time period may specifically include:
calculating the difference value of the water accumulation amount of the water collecting well at the ending moment of the time period and the water accumulation amount at the starting moment of the time period to obtain the period water increment amount of each time period;
calculating the periodic water discharge of each time period according to the water discharge flow information;
and calculating the sum of the periodic water adding quantity and the periodic water discharging quantity to obtain the periodic water inflow of each time period, and determining the periodic water inflow of each time period as the water inflow information of the water collecting well.
Optionally, the predicting, based on the inflow rate information of the water collecting well in the preset time period, the inflow rate information of the water collecting well in a target time period by using a prediction algorithm may specifically include:
calculating by adopting an error tracking adaptive algorithm based on the periodic water inflow of the water collecting well in each time period in the preset time period to obtain a weight coefficient;
and predicting the cycle prediction water inflow of the water collecting well in each time period in the target time period based on the weight coefficient to obtain the water inflow information of the water collecting well in the target time period.
Optionally, the generating flood prevention information according to the inflow information of the water collecting well in the target time period may specifically include:
calculating the difference between the periodic prediction water inflow and the periodic preset water discharge of each time period in the target time period to obtain the periodic prediction water increment of each time period;
calculating the sum of the cycle predicted water increase amount of each time cycle between the target time and the current time in the target time period to obtain the predicted water increase amount of the water collecting well at the target time compared with the current time;
calculating the sum of the predicted water increase amount and a preset water accumulation amount at each target moment in the target time period to obtain the relation between the predicted water accumulation amount and time of the water collecting well in the target time period;
and generating the flood prevention information according to the relation between the predicted accumulated water amount of the water collecting well in the target time period and time.
Optionally, the generating the flood prevention information according to the relation between the predicted water accumulation amount of the water collecting well in the target time period and time may specifically include:
taking the periodic displacement of the time period corresponding to the current moment as the periodic preset displacement, taking the accumulated water quantity of the water collecting well at the current moment as the preset accumulated water quantity, and judging whether the water level of the water collecting well reaches the warning line of the water collecting well in the target time period according to the relation between the predicted accumulated water quantity of the water collecting well in the target time period and the time;
and if the water level of the water collecting well reaches the warning line in the target time period, calculating the time when the water level of the water collecting well reaches the warning line, and generating first flood prevention information, wherein the first flood prevention information is used for danger early warning, and comprises danger occurrence time.
Optionally, the generating the flood prevention information according to the relation between the predicted water accumulation amount of the water collecting well in the target time period and time may specifically include:
taking the displacement of one time period in the normal working state of the drainage system as the period preset displacement, taking the accumulated water quantity of the water collecting well at the current moment as the preset accumulated water quantity, and judging whether the water level of the water collecting well reaches the warning line of the water collecting well in the target time period according to the relation between the predicted accumulated water quantity of the water collecting well in the target time period and the time;
and if the water level of the water collecting well reaches the warning line in the target time period, calculating the time when the water level of the water collecting well reaches the warning line, and generating second flood prevention information, wherein the second flood prevention information is used for pre-warning of power failure.
Optionally, the generating the flood prevention information according to the relation between the predicted water accumulation amount of the water collecting well in the target time period and time may specifically include:
taking the water displacement of one time period in the normal working state of the drainage system as the period preset water displacement, taking the water accumulation amount of the water collecting well when the water level is a first preset threshold value as the preset water accumulation amount, and judging whether the water level of the water collecting well reaches the warning line of the water collecting well in the target time period according to the relation between the predicted water accumulation amount of the water collecting well in the target time period and the time;
and if the water level of the water collecting well reaches the warning line within the target time period, generating third flood prevention information, wherein the third flood prevention information is used for prompting the opening of the drainage system.
Optionally, before calculating the time when the water level of the water collecting well reaches the warning line and generating the first flood prevention information, the method may further include:
acquiring running electrical parameter information of a drainage pump of the drainage system in the preset time period;
the generating of the first flood prevention information specifically includes:
judging whether the running electrical parameters of the drainage pump are normal and whether the drainage flow at the current moment is normal;
and if the drainage flow at the current moment is less than or equal to b times of the rated drainage flow of the drainage system and the running electrical parameters of the drainage pump are normal, determining that the drainage pipeline of the drainage system is blocked or the drainage pipeline is broken, wherein the first flood prevention information further comprises the blockage or the breakage of the drainage pipeline, b is an empirical value, and b is less than or equal to 0.9.
Optionally, before calculating the time when the water level of the water collecting well reaches the warning line and generating the first flood prevention information, the method may further include:
acquiring running electrical parameter information of a drainage pump of the drainage system in the preset time period;
the generating of the first flood prevention information specifically includes:
judging whether the running electrical parameters of the drainage pump are normal and whether the drainage flow at the current moment is normal;
and if the drainage flow is less than or equal to c times of the rated drainage flow of the drainage system and the running current of the drainage pump is reduced by d, determining that the water inlet of the drainage pump is blocked, wherein the first flood prevention information further comprises the blockage of the water inlet of the drainage pump, wherein c and d are empirical values, c is more than or equal to 0.1 and less than or equal to 0.3, and d is more than or equal to 10% and less than or equal to 30%.
Optionally, before calculating the time when the water level of the water collecting well reaches the warning line and generating the first flood prevention information, the method may further include:
acquiring running electrical parameter information of a drainage pump of the drainage system in the preset time period;
the generating of the first flood prevention information specifically includes:
judging whether the running electrical parameters of the drainage pump are normal and whether the drainage flow at the current moment is normal;
and if the drainage flow is less than or equal to e times of the rated drainage volume of the drainage system and the running current of the drainage pump rises by f, determining that the water inlet of the drainage pump is blocked and the drainage pipeline is blocked, wherein the first flood prevention information further comprises the blockage of the water inlet of the drainage pump and the blockage of the drainage pipeline, e and f are empirical values, e is less than or equal to 0.1, and f is greater than or equal to 20%.
The invention has the following beneficial effects: according to the transformer substation flood prevention method provided by the invention, the inflow water flow information in the target time period of the water collecting well can be predicted, and flood prevention information is generated according to the inflow water flow information, and the flood prevention information can be used for informing workers of the time when danger occurs or prompting or controlling the opening and closing of a drainage system. The staff can judge the urgency of the emergency repair task according to the flood prevention information. Or the drainage system is controlled to be started before the water level reaches a preset fixed value when the rainfall is large, so that the risk that the power equipment is submerged due to untimely drainage is avoided.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a flow chart of a flood prevention method for a transformer substation;
fig. 2 is a schematic diagram of inflow, outflow and water level of the water collecting well.
Reference numerals:
1. a water collecting well.
Detailed Description
In order to facilitate clear description of technical solutions of the embodiments of the present invention, in the embodiments of the present invention, terms such as "first" and "second" are used to distinguish the same items or similar items having substantially the same functions and actions. For example, the first threshold and the second threshold are only used for distinguishing different thresholds, and the sequence order of the thresholds is not limited. Those skilled in the art will appreciate that the terms "first," "second," etc. do not denote any order or quantity, nor do the terms "first," "second," etc. denote any order or importance.
It is to be understood that the terms "exemplary" or "such as" are used herein to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.
With reference to fig. 1, a transformer substation flood prevention method provided by the present invention is described. Because the sump pit is in the minimum of transformer substation, when the water of sump pit can not in time discharge, can take place to flow backward the cable pit, submerge the risk of other power equipment.
The invention provides a transformer substation flood prevention method which can be applied to transformer substation flood prevention or flood prevention of other transformer substation-like places, and comprises the following steps:
s1: and acquiring water level information of the water collecting well 1 and drainage flow information of a drainage system in a preset time period.
The obtaining mode can be as follows: the water level (or the accumulated water amount) of the water collecting well 1 is periodically acquired, the water level (or the accumulated water amount) of the water collecting well 1 at each moment is water level information, the drainage flow of the drainage system is periodically acquired, and the drainage flow of the water collecting well 1 at each moment is drainage flow information. For example, the sump 1 is rectangular and the bottom area is SjAt t0、t1、t2...ti...tnTime of day (time interval T, T)nThe time is the current time t0To tnThe moment is a preset time period), the water level of the water collecting well 1 is measured to be h0、h1、h2...hi...hnThe drainage flow of the drainage system is q0、q1、q2...qi...qnThe water volume of the water collecting well 1 is measured directly by a flow sensor and is V0、V1、V2...Vi...VnCorresponding to a time period of T1、T2...Ti...Tn，Ti＝ti-ti-1. For a water collection well 1, the water volume is a fixed function of the water level, in this case Vi＝Sj*hi。
And S2, determining the water inlet flow information of the water collecting well 1 in the preset time period according to the water level information of the water collecting well 1 in the preset time period and the drainage flow information of the drainage system.
The method specifically comprises the following steps: and calculating the difference value of the water accumulation amount of the water collecting well 1 at the ending moment of the time period and the water accumulation amount at the starting moment of the time period to obtain the period water increment amount of each time period. T is1、T2...Ti...TnCorresponding periodic water addition of
Figure BDA0003474357580000061
Figure BDA0003474357580000062
Figure BDA0003474357580000063
...
Figure BDA0003474357580000064
...
Figure BDA0003474357580000071
And calculating the periodic water discharge amount of each time period according to the water discharge flow information. T is1、T2...Ti...TnCorresponding to a periodic displacement of
Figure BDA0003474357580000072
One approach calculation method is:
Figure BDA0003474357580000073
Figure BDA0003474357580000074
...
Figure BDA0003474357580000075
...
Figure BDA0003474357580000076
and calculating the sum of the periodic water increment and the periodic water discharge to obtain the periodic water inflow of each time period, and determining the periodic water inflow of each time period as the water inflow information of the water collecting well 1. T is1、T2...Ti...TnCorresponding periodic water addition of
Figure BDA0003474357580000077
Figure BDA0003474357580000078
Figure BDA0003474357580000079
...
Figure BDA00034743575800000710
...
Figure BDA00034743575800000711
And S3, based on the inflow water flow information of the water collecting well 1 in the preset time period, adopting a prediction algorithm to predict the inflow water flow information of the water collecting well 1 in the target time period, wherein the starting time of the target time period is later than the ending time of the preset time period.
One prediction method is as follows: calculating by adopting an error tracking adaptive algorithm based on the periodic water inflow of the water collecting well 1 in each time period in a preset time period to obtain a weight coefficient; weight coefficient of mu1、μ2...μN. Adopting a formula (1), a formula (2), a formula (3) and a formula (4) to carry out periodic water inflow of each time period in a preset time period
Figure BDA00034743575800000712
Iterate to the weight coefficient mu1、μ2...μNContinuously correcting to obtain the final weight coefficient,
Figure BDA00034743575800000713
if it is not
Figure BDA0003474357580000081
Then order
Figure BDA0003474357580000082
Figure BDA0003474357580000083
Figure BDA0003474357580000084
Wherein, t0Is an initial time tnIs the current time, tnTime tn+mWith a target time period between instants, tn+ 1...tn+mIs a target time, T1...TnIs t0Time tnOf time of dayThe number of n cycles in the time period,
Figure BDA0003474357580000085
is T1...TnThe actual value of the periodic water inflow of (c),
Figure BDA0003474357580000086
is a predicted value of the water inflow of the (k + 1) th period,
Figure BDA0003474357580000087
is composed of
Figure BDA0003474357580000088
Is the actual value of the water inflow of the k-i +1 th cycle, LiA is a proportional coefficient (preferably selected in the range of 0.15-0.35) which is an empirical coefficient, S is the predicted periodic precipitation of the period obtained from the precipitation of the weather forecasteIs the floor area of the transformer substation, muiIs the weight coefficient of the actual value of the periodic inflow of the k-i +1 th period, N is the number of the weight coefficients, i is more than or equal to 1 and is less than or equal to N, muiIs the ith weight, mu 'before adjustment'iK is a learning constant for the adjusted ith weight,
Figure BDA0003474357580000089
is Tk+1A prediction error of periodic water inflow of the period;
take N as an example and take 3 as p1、μ2、μ3Giving an initial value of μ1、μ2、μ3All initial values of (2) are set to 0.5
Figure BDA00034743575800000810
Substituting into the right side of formula (1) to obtain the predicted value
Figure BDA00034743575800000811
Figure BDA00034743575800000812
If it is not
Figure BDA00034743575800000813
Then order
Figure BDA00034743575800000814
Will predict the value
Figure BDA00034743575800000815
And the actual value
Figure BDA00034743575800000816
Substituting into formula (3) to obtain the prediction error
Figure BDA00034743575800000817
Figure BDA00034743575800000818
Will be provided with
Figure BDA00034743575800000819
Substituting equation (4) for μ1、μ2、μ3Correction is performed by giving an empirical value to k, after correction
Figure BDA00034743575800000820
Figure BDA00034743575800000821
Figure BDA00034743575800000822
Will be provided with
Figure BDA00034743575800000823
And corrected mu1、μ2、μ3Substituting into formula (1) to obtain the predicted value
Figure BDA00034743575800000824
If it is not
Figure BDA0003474357580000091
Then order
Figure BDA0003474357580000092
Will predict the value
Figure BDA0003474357580000093
And the actual value
Figure BDA0003474357580000094
Substituting into formula (3) to obtain the prediction error
Figure BDA0003474357580000095
Figure BDA0003474357580000096
Will be provided with
Figure BDA0003474357580000097
Substituting into equation (4) to again correct μ1、μ2、μ3Is corrected to
Figure BDA0003474357580000098
Figure BDA0003474357580000099
Figure BDA00034743575800000910
And sequentially iterating until all the periodic water inflow of each time period is processed, and obtaining the corrected weight coefficient.
And predicting the cycle prediction water inflow of the water collecting well 1 in each time period in the target time period based on the weight coefficient to obtain the water inflow information of the water collecting well 1 in the target time period.
And (3) predicting the cycle predicted water inflow of each cycle in the target time period by using a formula (1) and a formula (2) based on the weight coefficient after the last correction, and predicting the cycle water inflow of the (k + 1) th cycle by taking the predicted value of the cycle water inflow of the (k-i + 1) th cycle as an actual value if no actual value exists in the cycle water inflow of the (k-i + 1) th cycle on the right side of the formula (1) when the formula (1) is taken.
Figure BDA00034743575800000911
If it is not
Figure BDA00034743575800000912
Then order
Figure BDA00034743575800000913
Figure BDA00034743575800000914
If it is not
Figure BDA00034743575800000915
Then order
Figure BDA00034743575800000916
Figure BDA00034743575800000917
If it is not
Figure BDA00034743575800000918
Then order
Figure BDA00034743575800000919
...
Figure BDA00034743575800000920
If it is not
Figure BDA00034743575800000921
Then order
Figure BDA00034743575800000922
Therefore, the cycle predicted water inflow of each time cycle in the target time period is obtained. The method adopts an error tracking adaptive algorithm and integrates precipitation of weather forecast, data processing is carried out on periodic inflow and the periodic prediction inflow is predicted, and as the weight coefficient is continuously updated and corrected based on the actual inflow, the prediction is more accurate and the development of the flood situation can be followed in time.
And S4, generating flood prevention information according to the water inlet flow information of the water collecting well 1 in the target time period.
The method specifically comprises the following steps: and calculating the difference between the periodic water inflow and the periodic preset water discharge of each time period in the target time period to obtain the periodic prediction water increment of each time period. Periodically predict the water addition amount as
Figure BDA0003474357580000101
The cycle of each time period in the target time period is preset as the water discharge amount
Figure BDA0003474357580000102
Here, the periodic preset water discharge amount may be set to a constant value.
Figure BDA0003474357580000103
Figure BDA0003474357580000104
...
Figure BDA0003474357580000105
And calculating the sum of the cycle predicted water increase amount of each time period between the target time and the current time in the target time period to obtain the predicted water increase amount of the water collecting well 1 at the target time compared with the current time. Predicting the water addition of
Figure BDA0003474357580000106
Figure BDA0003474357580000107
Figure BDA0003474357580000108
...
Figure BDA0003474357580000109
And calculating the sum of the predicted water increment and the preset water accumulation at each target moment in the target time period to obtain the relation between the predicted water accumulation of the water collecting well 1 and the time in the target time period. The preset water accumulation is V. The predicted water accumulation at the target time is as follows:
Figure BDA00034743575800001010
Figure BDA00034743575800001011
Figure BDA00034743575800001012
...
Figure BDA00034743575800001013
of course, curve fitting can be performed on the predicted water accumulation amount at the target time, the predicted water accumulation amount at any time in the target time period is obtained, and a curve graph of the predicted water accumulation amount and the time is obtained.
And generating flood prevention information according to the relation between the predicted accumulated water amount of the water collecting well 1 in the target time period and time.
According to the invention, the water level information and the drainage flow information in the preset time period are acquired, the water inflow flow information in the preset time period is obtained through calculation, and the water inflow flow information in the target time period is obtained through prediction according to the water inflow flow information in the preset time period. Based on the inflow water flow information in the target time period, different periodic preset displacement of the preset accumulated water amount is added, and the relation between the predicted accumulated water amount and the time of the water collecting well 1 in different target time periods can be obtained.
Firstly, the time that danger takes place can be forecasted, and the flood prevention information that generates can be used for the early warning, can tell staff's the time that danger takes place when the early warning to the staff knows dangerous urgency, according to the difference of danger emergence time, makes different emergency treatment.
And secondly, whether the danger occurs in the target time period can be predicted, and the generated flood prevention information can be used for prompting whether to start the drainage system. When the water level of the existing drainage system reaches a first preset threshold value, the drainage system is started, and when the water level is lower than the first preset threshold value, the drainage system is closed. Such a condition can appear like this, if the rainfall is great, just open when the water level reaches first preset threshold value, can appear the untimely condition of drainage, because drainage system opens late and takes place to spill over the risk. The invention can determine whether to open the drainage system in advance according to whether the danger occurs.
Wherein, the first condition is that the drainage system is determined to be in an open state and the periodic drainage amount corresponding to the current time
Figure BDA0003474357580000111
When the water displacement is less than the water displacement of the drainage system in normal work, the fault of the drainage system can be determined, and the periodic preset water displacement is enabled
Figure BDA0003474357580000112
Equal to the periodic displacement corresponding to the current moment
Figure BDA0003474357580000113
The preset water accumulation volume V is equal to the water accumulation volume V at the current momentnObtaining the relation between the predicted water accumulation amount of the water collecting well 1 in the target time period and the time;
judging whether the water level of the water collecting well 1 reaches a warning line of the water collecting well 1 within a target time period;
if the water level of the water collecting well 1 reaches the warning line in the target time period, calculating the time when the water level of the water collecting well 1 reaches the warning line, and generating first flood prevention information, wherein the first flood prevention information is used for danger early warning, and comprises danger occurrence time.
Therefore, the first flood prevention information can be used for fault early warning, can inform workers that the drainage system has a fault, and can cause danger for a long time in a fault state. Therefore, the workers can make full preparations according to time to carry out emergency repair. When a plurality of drainage systems are in failure and insufficient personnel are available, which one of the drainage systems is to be first repaired can be determined according to the time of danger occurrence.
The early warning of the danger occurrence time may have various forms, and may be implemented by segmenting the danger occurrence time, where different segments correspond to different early warning levels, for example, 0 level (the most dangerous level) within 1 hour and 1 level between 1 hour and 2 hours.
Of course, the exact time when the hazard occurs can also be directly displayed through the display screen.
Note that t isnAnd the moment is the current moment, and prediction is carried out at the current moment to generate flood prevention information. The current time is constantly changing, and the preset time period and the target time period are also constantly changing.
In the second case, the water discharge amount is preset with the water discharge amount of one time period in a normal operation state of the water discharge system as a period
Figure BDA0003474357580000121
The water volume V of the water collecting well 1 at the current momentnAs the preset water accumulation amount V, the relation between the predicted water accumulation amount of the water collecting well 1 in the target time period and the time is obtained, and whether the water level of the water collecting well 1 reaches the warning line of the water collecting well 1 in the target time period when the drainage system is not in fault can be judged;
and if the water level of the water collecting well 1 reaches the warning line in the target time period, calculating the time when the water level of the water collecting well 1 reaches the warning line, and generating second flood prevention information, wherein the second flood prevention information is used for pre-power-off early warning.
So, can judge under the condition that drainage system does not break down, sump pit 1 still has the risk of overflowing, and under this condition, the staff can decide whether to cut off the power supply to key equipment according to the circumstances to cause dangerous enlargements.
In the third case, the water discharge amount is preset with the water discharge amount of one time period in the normal operation state of the drainage system as a period
Figure BDA0003474357580000122
Taking the accumulated water volume of the water collecting well 1 as a preset accumulated water volume V when the water level is a first preset threshold, and judging whether the water level of the water collecting well 1 reaches a warning line of the water collecting well 1 in a target time period according to the relation between the predicted accumulated water volume of the water collecting well 1 in the target time period and time;
and if the water level of the water collecting well 1 reaches the warning line in the target time period, generating third flood prevention information, wherein the third flood prevention information is used for prompting the starting of a drainage system.
Therefore, the drainage system can be judged to be started when the water level reaches the first preset threshold, whether the water level reaches the warning line in the target time period or not is judged, if the water level reaches the warning line, the drainage system is prompted or controlled to be started, and danger caused by untimely starting of the drainage system is avoided (in the prior art, the drainage system is started only when the water level reaches the first preset threshold). The third flood prevention information can prompt the staff to start the drainage system and also can be an instruction for directly controlling the starting of the drainage system. When the water level is determined to be below the first preset threshold value and the water level does not reach the warning line within the target time period, the drainage system is prompted or controlled to be closed.
On the basis of the first case, a step of acquiring the running electrical parameter information of the drainage pump of the drainage system is added within a preset time period.
When flood prevention information is generated, whether the running electrical parameters of the drainage pump are normal and whether the drainage flow at the current moment is normal are judged; and comparing the running electrical parameters of the drainage pump with the running electrical parameters of the drainage pump in the normal state, and comparing the drainage flow at the current moment with the drainage flow of the drainage system in the normal state.
If the drainage flow at the current moment is less than or equal to b times of the rated drainage flow of the drainage system and the operation electrical parameter of the drainage pump is within the rated range (namely the operation electrical parameter of the drainage pump is normal), determining that the drainage pipeline of the drainage system is blocked or broken, wherein the first flood prevention information further comprises the blockage or breakage of the drainage pipeline, b is an empirical value, b is less than or equal to 0.9, and b is preferably 0.8.
Through the comprehensive analysis to the operation electrical parameter and the drainage flow of drainage pump, can confirm drainage system's concrete fault reason, when generating first flood prevention information, drainage pipe takes place to block up or drainage pipe leaks absolutely when can also telling the staff, and the staff is when salvageing, can directly inspect, repair drainage pipe, reduces salvage time.
And if the drainage flow is less than or equal to c times of the rated drainage flow of the drainage system and the running current of the drainage pump is reduced by d, determining that the water inlet of the drainage pump is blocked, wherein the first flood prevention information also comprises the blockage of the water inlet of the drainage pump, c and d are empirical values, c is more than or equal to 0.1 and less than or equal to 0.3, d is more than or equal to 10% and less than or equal to 30%, c is preferably 0.2, and d is preferably 20%.
At the moment, the first flood prevention information can inform workers of the time when the water inlet of the drainage pump is blocked and dangerous, the workers can directly inspect and repair the drainage pump, and the rush repair time is shortened.
And if the drainage flow is less than or equal to e times of the rated drainage volume of the drainage system and the running current of the drainage pump rises by f, determining that the inlet of the drainage pump is blocked and the drainage pipeline is blocked, wherein the first flood prevention information also comprises the blockage of the water inlet of the drainage pump and the blockage of the drainage pipeline, e and f are empirical values, e is less than or equal to 0.1, and f is greater than or equal to 20%.
At the moment, the first flood prevention information can inform workers of the blockage of the water inlet of the drainage pump and the blockage of the drainage pipeline, the workers need to inspect and repair the drainage pump and the drainage pipeline, and the rush repair time is shortened.
Because the resistance of the water in the drain pump housing causes the current in the drain pump to increase only when the drain pump inlet blockage and drain line blockage occur simultaneously, i.e., both the inlet and outlet of the drain pump are blocked.
While the invention has been described in connection with various embodiments, other variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed invention, from a review of the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the word "a" or "an" does not exclude a plurality. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.
While the invention has been described in conjunction with specific features and embodiments thereof, it will be evident that various modifications and combinations can be made thereto without departing from the spirit and scope of the invention. Accordingly, the specification and figures are merely exemplary of the invention as defined in the appended claims and are intended to cover any and all modifications, variations, combinations, or equivalents within the scope of the invention. It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (10)

1. A flood prevention method for a transformer substation is characterized by comprising the following steps:
acquiring water level information of a water collecting well and drainage flow information of a drainage system in a preset time period;
determining water inlet flow information of the water collecting well in the preset time period according to the water level information of the water collecting well in the preset time period and the drainage flow information of the drainage system;
predicting the water inlet flow information of the water collecting well in a target time period by adopting a prediction algorithm based on the water inlet flow information of the water collecting well in the preset time period, wherein the starting time of the target time period is later than the ending time of the preset time period;
and generating flood prevention information according to the water inlet flow information of the water collecting well in the target time period.
2. The transformer substation flood prevention method according to claim 1, wherein the preset time period and the target time period each comprise a plurality of time periods; the method for determining the water inlet flow information of the water collecting well in the preset time period according to the water level information of the water collecting well in the preset time period and the drainage flow information of the drainage system specifically comprises the following steps:
calculating the difference value of the water accumulation amount of the water collecting well at the ending moment of the time period and the water accumulation amount at the starting moment of the time period to obtain the period water increment amount of each time period;
calculating the periodic water discharge of each time period according to the water discharge flow information;
and calculating the sum of the periodic water adding quantity and the periodic water discharging quantity to obtain the periodic water inflow of each time period, and determining the periodic water inflow of each time period as the water inflow information of the water collecting well.
3. The transformer substation flood prevention method according to claim 2, wherein the predicting of the inflow information of the water collecting well in the target time period by using a prediction algorithm based on the inflow information of the water collecting well in the preset time period specifically comprises:
calculating by adopting an error tracking adaptive algorithm based on the periodic water inflow of the water collecting well in each time period in the preset time period to obtain a weight coefficient;
and predicting the cycle prediction water inflow of the water collecting well in each time period in the target time period based on the weight coefficient to obtain the water inflow information of the water collecting well in the target time period.
4. The transformer substation flood prevention method according to claim 2, wherein the flood prevention information is generated according to the inflow information of the water collecting well in the target time period, and specifically comprises the following steps:
calculating the difference between the periodic prediction water inflow and the periodic preset water discharge of each time period in the target time period to obtain the periodic prediction water increment of each time period;
calculating the sum of the cycle predicted water increase amount of each time cycle between the target time and the current time in the target time period to obtain the predicted water increase amount of the water collecting well at the target time compared with the current time;
calculating the sum of the predicted water increase amount and a preset water accumulation amount at each target moment in the target time period to obtain the relation between the predicted water accumulation amount and time of the water collecting well in the target time period;
and generating the flood prevention information according to the relation between the predicted accumulated water amount of the water collecting well in the target time period and time.
5. The substation flood prevention method according to claim 4, wherein the generating of the flood prevention information according to the relation between the predicted accumulated water amount of the water collecting well and time in the target time period specifically comprises:
taking the periodic displacement of the time period corresponding to the current moment as the periodic preset displacement, taking the accumulated water quantity of the water collecting well at the current moment as the preset accumulated water quantity, and judging whether the water level of the water collecting well reaches the warning line of the water collecting well in the target time period according to the relation between the predicted accumulated water quantity of the water collecting well in the target time period and the time;
and if the water level of the water collecting well reaches the warning line in the target time period, calculating the time when the water level of the water collecting well reaches the warning line, and generating first flood prevention information, wherein the first flood prevention information is used for danger early warning, and comprises danger occurrence time.
6. The substation flood prevention method according to claim 4, wherein the generating of the flood prevention information according to the relation between the predicted accumulated water amount of the water collecting well and time in the target time period specifically comprises:
taking the displacement of one time period in the normal working state of the drainage system as the period preset displacement, taking the accumulated water quantity of the water collecting well at the current moment as the preset accumulated water quantity, and judging whether the water level of the water collecting well reaches the warning line of the water collecting well in the target time period according to the relation between the predicted accumulated water quantity of the water collecting well in the target time period and the time;
and if the water level of the water collecting well reaches the warning line in the target time period, calculating the time when the water level of the water collecting well reaches the warning line, and generating second flood prevention information, wherein the second flood prevention information is used for pre-warning of power failure.
7. The substation flood prevention method according to claim 4, wherein the generating of the flood prevention information according to the relation between the predicted accumulated water amount of the water collecting well and time in the target time period specifically comprises:
taking the water displacement of one time period in the normal working state of the drainage system as the period preset water displacement, taking the water accumulation amount of the water collecting well when the water level is a first preset threshold value as the preset water accumulation amount, and judging whether the water level of the water collecting well reaches the warning line of the water collecting well in the target time period according to the relation between the predicted water accumulation amount of the water collecting well in the target time period and the time;
and if the water level of the water collecting well reaches the warning line within the target time period, generating third flood prevention information, wherein the third flood prevention information is used for prompting the opening of the drainage system.
8. The transformer substation flood prevention method according to claim 5, wherein before calculating the time for the water level of the water collecting well to reach the warning line and generating the first flood prevention information, the method further comprises:
acquiring running electrical parameter information of a drainage pump of the drainage system in the preset time period;
the generating of the first flood prevention information specifically includes:
judging whether the running electrical parameters of the drainage pump are normal and whether the drainage flow at the current moment is normal;
and if the drainage flow at the current moment is less than or equal to b times of the rated drainage flow of the drainage system and the running electrical parameters of the drainage pump are normal, determining that the drainage pipeline of the drainage system is blocked or the drainage pipeline is broken, wherein the first flood prevention information further comprises the blockage or the breakage of the drainage pipeline, b is an empirical value, and b is less than or equal to 0.9.
9. The transformer substation flood prevention method according to claim 5, wherein before calculating the time for the water level of the water collecting well to reach the warning line and generating the first flood prevention information, the method further comprises:
acquiring running electrical parameter information of a drainage pump of the drainage system in the preset time period;
the generating of the first flood prevention information specifically includes:
judging whether the running electrical parameters of the drainage pump are normal and whether the drainage flow at the current moment is normal;
and if the drainage flow is less than or equal to c times of the rated drainage flow of the drainage system and the running current of the drainage pump is reduced by d, determining that the water inlet of the drainage pump is blocked, wherein the first flood prevention information further comprises the blockage of the water inlet of the drainage pump, wherein c and d are empirical values, c is more than or equal to 0.1 and less than or equal to 0.3, and d is more than or equal to 10% and less than or equal to 30%.
10. The transformer substation flood prevention method according to claim 5, wherein before calculating the time for the water level of the water collecting well to reach the warning line and generating the first flood prevention information, the method further comprises:
acquiring running electrical parameter information of a drainage pump of the drainage system in the preset time period;
the generating of the first flood prevention information specifically includes:
judging whether the running electrical parameters of the drainage pump are normal and whether the drainage flow at the current moment is normal;
and if the drainage flow is less than or equal to e times of the rated drainage volume of the drainage system and the running current of the drainage pump rises by f, determining that the water inlet of the drainage pump is blocked and the drainage pipeline is blocked, wherein the first flood prevention information further comprises the blockage of the water inlet of the drainage pump and the blockage of the drainage pipeline, e and f are empirical values, e is less than or equal to 0.1, and f is greater than or equal to 20%.
CN202210051044.1A 2022-01-17 2022-01-17 Flood prevention method for transformer substation Pending CN114399116A (en)

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