CN117191285A - Hydropower station speed regulator system pressure leakage detection method - Google Patents
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Abstract
The invention provides a method for detecting pressure leakage of a hydropower station speed regulator system, and relates to the field of hydropower automation. The method comprises the following steps: s1: collecting the current preset time lengthTFirst air make-up data for an internal target hydropower station governor system; s2: calculating the current average air supplementing interval duration and the current theoretical air supplementing times according to the first air supplementing data; s3: determining a first correlation coefficient according to the current average air supplementing interval duration and a first preset threshold value, and determining a second correlation coefficient according to the current theoretical air supplementing times and a second preset threshold value; s4: according to a preset logic relationship, calculating the current logic relationship value of the first correlation coefficient and the second correlation coefficient; s5: and determining the pressure leakage condition of the target hydropower station speed regulator system according to the current logic relation value of the first correlation coefficient and the second correlation coefficient. The invention effectively improves the accuracy and efficiency of the pressure leakage detection of the hydropower station speed regulator system.
Description
Technical Field
The invention relates to the field of hydropower automation, in particular to a hydropower station speed regulator system pressure leakage detection method.
Background
The stability and reliability of the speed regulator system are important factors for ensuring the stable operation of the power system, and the pressure value of the speed regulator system is an important index for measuring the stable operation of the speed regulator system. The pressure oil tank acts as an energy accumulator in the speed regulator system, so that the working pressure of the system is stabilized within a specified range, and the stable operation of the speed regulator system is ensured. Under normal conditions, the upper part of the pressure oil tank is filled with about 2/3 of compressed air, the lower part of the pressure oil tank is filled with about 1/3 of pressure oil, the replenishment and the discharge of the compressed air are carried out through an automatic air supplementing device arranged on the pressure oil tank, and when the pressure in the oil tank reaches a set rated value and the oil level reaches an air supplementing oil level, the pressure oil tank needs to be automatically supplemented with air. At the moment, the control system automatically opens the electromagnetic air compensating valve, and after the pressure of the pressure oil tank reaches the highest normal value or the oil level is reduced to the set air compensating exit oil level value, the air compensating valve is closed to complete one-time automatic air compensating operation.
After a long period of operation of the governor system, certain sealing components (such as the sealing rings) wear, resulting in pressure leakage, which makes the system unable to operate stably and reliably. Because the automatic air supplementing device can automatically control the supplement and discharge of compressed air, operators on duty can hardly accurately find the problem of pressure leakage of the speed regulator system in regular inspection. In addition, in order to better find the pressure leakage condition of the speed regulator system, sometimes the system has to be stopped, so that maintenance personnel can comprehensively detect the pressure leakage condition of the speed regulator system, the detection efficiency is low, the power generation efficiency of the hydropower station is reduced, and the problem that the pressure leakage of the speed regulator system cannot be found in time exists.
Disclosure of Invention
The invention aims to solve the technical problems that: the existing hydropower station speed regulator system pressure leakage detection method is not intelligent enough, and has the problems of low detection accuracy and efficiency and incapability of timely finding out pressure leakage of the speed regulator system.
In order to solve the technical problems, the embodiment of the invention provides a method for detecting pressure leakage of a hydropower station speed regulator system, which comprises the following steps:
s1: collecting first air supplement data of a target hydropower station speed regulator system within a current preset time length T; the first air supplementing data at least comprise each air supplementing moment, each air supplementing interval duration, each air supplementing duration and total air supplementing times of a target hydropower station speed regulator system within a current preset duration T;
s2: calculating the current average air supplementing interval duration and the current theoretical air supplementing times according to the first air supplementing data;
s3: determining a first correlation coefficient according to the current average air supplementing interval duration and a first preset threshold value, and determining a second correlation coefficient according to the current theoretical air supplementing times and a second preset threshold value; the first preset threshold value is related to the historical normal air supplementing interval duration of the target hydropower station speed regulator system, and the second preset threshold value is related to the historical normal air supplementing times per month of the target hydropower station speed regulator system;
s4: according to a preset logic relationship, calculating the current logic relationship value of the first correlation coefficient and the second correlation coefficient;
s5: and determining the pressure leakage condition of the target hydropower station speed regulator system according to the current logic relation value of the first correlation coefficient and the second correlation coefficient.
In some embodiments, the step S2 includes:
s21: calculating according to a first formula (1) to obtain the current average air supplementing interval duration, and calculating according to a second formula (2) to obtain the current average air supplementing duration;
s22: calculating and obtaining the current theoretical air supplementing times based on a third formula (3) according to the current average air supplementing interval duration, the current average air supplementing duration and the 1 st and last air supplementing moments of the target hydropower station speed regulator system in the current preset duration T;
wherein, the first formula (1) is:
in the first formula (1), tave is the current average air-supplementing interval duration, and the unit is hour, T 1 、T 3 、T 3 、……、T n The method comprises the steps of (1) time, 2 times, 3 times, … … times and n times of air supplementing interval duration of a target hydropower station speed regulator system in a current preset duration T, wherein the unit is an hour, and n is the total number of air supplementing times of the target hydropower station speed regulator system in the current preset duration T;
the second formula (2) is:
in the second formula (2), T' ave The current average air supplementing time length is expressed as hour, P 1 、P 2 、P 3 、……、P n The 1 st, 2 nd, 3 rd, … … and nth air supplementing time of the target hydropower station speed regulator system within the current preset time length T is in hours;
the third formula (3) is:
in the third formula (3), m is the current theoretical air supplementing times, Q n 、Q 1 The nth air supplementing time and the 1 st air supplementing time of the target hydropower station speed regulator system in the current preset time length T are respectively.
In some embodiments, the step S3 includes:
s31: calculating a representation value of the current average air supplementing interval duration based on the following fourth formula (4) according to the current average air supplementing interval duration and the air supplementing times of the target hydropower station speed regulator system in the current preset duration T;
wherein k is t Representing the value for the current average air supplementing interval duration;
s32: judging whether the representation value of the current average air supplementing interval duration is smaller than a first preset threshold value, if so, enabling the first correlation coefficient to be 1, otherwise, enabling the first correlation coefficient to be 0;
s33: judging whether the current theoretical air supplementing times are greater than a second preset threshold value, if so, enabling the second correlation coefficient to be 1, and otherwise, enabling the second correlation coefficient to be 0.
In some embodiments, the step S4 includes:
performing logical AND operation on the first correlation coefficient and the second correlation coefficient to obtain a current logical relation value of the first correlation coefficient and the second correlation coefficient;
the step S5 includes:
judging whether the current logic relation value of the first correlation coefficient and the second correlation coefficient is equal to 1; if so, determining that the pressure of the target hydropower station speed regulator system is leaked, otherwise, determining that the pressure of the target hydropower station speed regulator system is not leaked.
In some embodiments, before the step S1, the method further includes:
step A1: acquiring second air supplementing data of the target hydropower station speed regulator system in a history preset time period T under the condition that the pressure is not leaked; the second air supplementing data at least comprise the time length of each normal air supplementing interval and the total times of normal air supplementing of the target hydropower station speed regulator system within the history preset time length T;
step A2: calculating a first preset threshold according to the following fifth formula (5):
wherein k 'is a first preset threshold, and the unit is hour, T' 1 、T′ 2 ……、T n′ The time length of normal air supplementing intervals of the 1 st, 2 nd, 3 rd, … … and n' th times of the target hydropower station speed regulator system in the history preset time length T is the total number of normal air supplementing times of the target hydropower station speed regulator system in the history preset time length T.
In some embodiments, before the step S1, the method further includes:
step B1: acquiring the normal total times of air supplement of a target hydropower station speed regulator system in each month in one year under the condition that the pressure is not leaked;
step B2: calculating a second preset threshold according to the following sixth formula (6):
wherein Nset is a second preset threshold, a 1 、a 2 、a 3 、……、a 12 The total normal air supplementing times of the 1 st month, the 2 nd month, the 3 rd month, the … … th month and the 12 th month in one year are respectively shown under the condition that the pressure of the speed regulator system of the target hydropower station is not leaked.
In some embodiments, collecting first air supplement data of a target hydropower station speed regulator system within a preset time period T includes:
and remotely acquiring first air supplementing data of a target hydropower station speed regulator system within a preset time period T through an industrial Internet platform.
In some embodiments, after determining the pressure leak of the target hydropower station governor system, the method further comprises:
the alarm is given by means of sound and/or light.
According to the technical scheme, the pressure leakage detection method for the hydropower station speed regulator system comprises the steps of firstly collecting air supplementing data such as air supplementing time, air supplementing interval time, air supplementing time, total air supplementing times and the like of the speed regulator system in a preset time period T, then calculating average air supplementing interval time and current theoretical air supplementing times according to the collected air supplementing data, then determining the current logic relation value of the calculated value and the first preset threshold value and the second preset threshold value, determining the first correlation coefficient and the second correlation coefficient, and finally determining the pressure leakage condition of the target hydropower station speed regulator system according to the logic relation value. The method disclosed by the invention does not need manual participation, effectively improves the level of intellectualization, and in addition, effectively improves the accuracy and efficiency of pressure leakage detection of the speed regulator system, and can enable operators on duty to timely find the problem of pressure leakage.
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In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic flow diagram of a method for detecting pressure leakage of a hydropower station speed regulator system according to an embodiment of the invention;
FIG. 2 is a schematic flow chart of step S2;
fig. 3 is a schematic flow chart of step S3.
Detailed Description
Embodiments of the present invention are described in further detail below with reference to the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are provided to illustrate the principles of the invention and are not intended to limit the scope of the invention, which may be embodied in many different forms and not limited to the specific embodiments disclosed herein, but rather to include all technical solutions falling within the scope of the claims.
These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. It should be noted that: the relative arrangement of parts and steps, the composition of materials, numerical expressions and numerical values set forth in these embodiments should be construed as exemplary only and not limiting unless otherwise specifically stated.
In the description of the present invention, unless otherwise indicated, the meaning of "plurality of" means greater than or equal to two; the terms "upper," "lower," "left," "right," "inner," "outer," and the like are merely used for convenience in describing the present invention and to simplify the description, and do not denote or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present invention. When the absolute position of the object to be described is changed, the relative positional relationship may be changed accordingly.
Furthermore, the use of the terms first, second, and the like in the present application are not used for any order, quantity, or importance, but rather are used for distinguishing between different parts. The "vertical" is not strictly vertical but is within the allowable error range. "parallel" is not strictly parallel but is within the tolerance of the error. The word "comprising" or "comprises" and the like means that elements preceding the word encompass the elements recited after the word, and not exclude the possibility of also encompassing other elements.
It should also be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention can be understood as appropriate by those of ordinary skill in the art. When a particular device is described as being located between a first device and a second device, there may or may not be an intervening device between the particular device and either the first device or the second device.
All terms used herein have the same meaning as understood by one of ordinary skill in the art to which the present invention pertains, unless specifically defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods, and apparatus should be considered part of the specification.
Fig. 1 is a schematic flow chart of a method for detecting pressure leakage of a hydropower station speed regulator system according to an embodiment of the invention. As shown in fig. 1, the method for detecting the pressure leakage of the hydropower station speed regulator system comprises the following steps S1-S5:
s1: and collecting first air supplementing data of a target hydropower station speed regulator system within the current preset time length T.
The first air supplementing data at least comprise each air supplementing time, each air supplementing interval time, each air supplementing time and total air supplementing times of the target hydropower station speed regulator system in the current preset time length T.
In the embodiment, the time of each air supplement interval, the time of each air supplement and the total number of air supplement of the hydropower station speed regulator system are collected, and the information reflects the working condition of the hydropower station speed regulator system objectively, so that the pressure leakage condition of the hydropower station speed regulator system can be accurately judged according to the information.
S2: and calculating the current average air supplementing interval duration and the current theoretical air supplementing times according to the first air supplementing data.
In this embodiment, when the automatic air supplementing device automatically controls the compressed air to supplement, the single air supplementing interval duration has a slight fluctuation condition, so that the average air supplementing interval duration is calculated, which is favorable for overcoming the fluctuation problem of the single air supplementing interval duration, and the pressure leakage condition of the target hydropower station speed regulator system is determined by using the data in the follow-up process.
S3: and determining a first correlation coefficient according to the current average air supplementing interval duration and a first preset threshold value, and determining a second correlation coefficient according to the current theoretical air supplementing times and a second preset threshold value.
The first preset threshold value is related to the historical normal air supplement interval duration of the target hydropower station speed regulator system, and the second preset threshold value is related to the historical normal air supplement times of the target hydropower station speed regulator system in a monthly mode.
In this embodiment, under normal conditions of the speed regulator system, the air-supplementing interval duration, the single automatic air-supplementing duration, and the air-supplementing times of the speed regulator system are regularly changed, and generally the automatic air-supplementing interval duration, each automatic air-supplementing duration, and the total air-supplementing times are relatively fixed in a fixed time. Under the condition of pressure leakage of the speed regulator system, the automatic air supplementing interval duration is in a shortened trend, the single automatic air supplementing duration is also in a shortened trend, and the total automatic air supplementing frequency is in an increased trend, so that the pressure leakage condition of the speed regulator system of the target hydropower station can be accurately reflected by the two correlation coefficients according to the first correlation coefficient determined by the current average air supplementing interval duration and the first preset threshold value and the second correlation coefficient determined by the current theoretical air supplementing frequency and the second preset threshold value.
S4: and calculating the current logic relation value of the first correlation coefficient and the second correlation coefficient according to a preset logic relation.
S5: and determining the pressure leakage condition of the target hydropower station speed regulator system according to the current logic relation value of the first correlation coefficient and the second correlation coefficient.
The embodiment of the invention provides a hydropower station speed regulator system pressure leakage detection method, which comprises the steps of firstly collecting air supplementing data such as air supplementing time, air supplementing interval time, air supplementing total times and the like of a speed regulator system in a preset time period T, then calculating average air supplementing interval time and current theoretical air supplementing times according to the collected air supplementing data, then determining a calculated value, a first preset threshold value, a second preset threshold value, determining a current logic relation value of a first correlation coefficient and a second correlation coefficient, and finally determining the pressure leakage condition of a target hydropower station speed regulator system according to the logic relation value. The method disclosed by the invention does not need manual participation, effectively improves the level of intellectualization, and in addition, effectively improves the accuracy and efficiency of pressure leakage detection of the speed regulator system, and can enable operators on duty to timely find the problem of pressure leakage.
In some embodiments, fig. 2 is a schematic flow chart of step S2. As shown in fig. 2, step S2 may include the following steps S21-S22:
s21: and calculating according to a first formula (1) to obtain the current average air supplementing interval duration, and calculating according to a second formula (2) to obtain the current average air supplementing duration.
S22: and calculating and obtaining the current theoretical air supplementing times based on a third formula (3) according to the current average air supplementing interval duration, the current average air supplementing duration and the 1 st and last air supplementing moments of the target hydropower station speed regulator system in the current preset duration T.
Wherein, the first formula is:
in the first formula (1), tave is the current average air-supplementing interval duration, and the unit is hour, T 1 、T 2 、T 3 、……、T n The method comprises the steps of (1) time, 2 times, 3 times, … … times and n times of air supplementing interval duration of a target hydropower station speed regulator system in a current preset duration T, wherein the unit is an hour, and n is the total number of air supplementing times of the target hydropower station speed regulator system in the current preset duration T;
the second formula (2) is:
in the second formula (2), T' ave The current average air supplementing time length is expressed as hour, P 1 、P 2 、P 3 、……、P n The 1 st, 2 nd, 3 rd, … … and nth air supplementing time of the target hydropower station speed regulator system within the current preset time length T is in hours;
the third formula (3) is:
in the third formula (3), m is the current theoretical air supplementing times, Q n 、Q 1 The nth air supplementing time and the 1 st air supplementing time of the target hydropower station speed regulator system in the current preset time length T are respectively.
In this embodiment, the collecting time period is 2023, 7 months, 1 day to 31 days, and the total time period is 1 month, the last air supplementing time is 2023, 6 months, 30 days, 23:59:59, and the information of each air supplementing time, each air supplementing interval time period, each air supplementing time period, total air supplementing times and the like of the target hydropower station speed regulator system is collected as shown in the following table 1:
TABLE 1 first tonifying qi data information table
According to the first formula (1), the current average air-make interval duration:
tave= (123.67+218.92+121.57+133.00+139.42)/5= 147.31 hours;
according to the second formula (2), the current average air-make-up duration:
hours of
Based on a third formula (3), the current theoretical number of air supplements:
and calculating according to the first formula, the second formula and the third formula and the first air supplementing data to obtain the current average air supplementing interval duration and the current theoretical air supplementing times, so that the subsequent determination of the pressure leakage condition of the hydropower station speed regulator system is facilitated.
The method for detecting the pressure leakage of the hydropower station speed regulator system provided by the embodiments can rapidly calculate the current average air supplementing interval duration and the current theoretical air supplementing times by utilizing an arithmetic formula, has the advantages of simplicity and rapidness in calculation, and effectively improves the efficiency of determining the pressure leakage of the hydropower station speed regulator system.
In some embodiments, fig. 3 is a schematic flow chart of step S3. As shown in fig. 3, step S3 may include the following steps S31-S37:
s31: calculating a representation value of the current average air supplementing interval duration based on a fourth formula (4) according to the current average air supplementing interval duration and the air supplementing times of the target hydropower station speed regulator system in the current preset duration T;
the fourth formula (4) is as follows:
wherein k is t And representing the value for the current average air supplementing interval duration.
In this step, taking the first air-supplementing data collected in table 1 as an example, the current average air-supplementing interval duration represents the value:
the characterization value calculated according to the formula 4 is convenient for determining the pressure leakage condition of the hydropower station speed regulator system according to the characterization value, and has the advantage of simple judgment mode.
S32: and judging whether the representation value of the current average air supplementing interval duration is smaller than a first preset threshold value, if yes, executing the step S33, otherwise, executing the step S34.
S33: let the first correlation coefficient be 1, and execute step S35.
S34: otherwise, let the first correlation coefficient be 0.
S35: and judging whether the current theoretical air supplementing times are larger than a second preset threshold value, if so, executing the step S36, otherwise, executing the step S37.
S36: let the second correlation coefficient be 1.
S37: let the second correlation coefficient be 0.
According to the hydropower station speed regulator system pressure leakage detection method provided by the embodiments, the average air supplementing interval duration representation value and the theoretical air supplementing times are respectively compared with the first preset threshold value and the second preset threshold value, so that the pressure leakage condition of the hydropower station speed regulator system can be accurately determined.
In some embodiments, step S4 may include:
performing logical AND operation on the first correlation coefficient and the second correlation coefficient to obtain a current logical relation value of the first correlation coefficient and the second correlation coefficient;
step S5 may include:
judging whether the current logic relation value of the first correlation coefficient and the second correlation coefficient is equal to 1; if so, determining that the pressure of the target hydropower station speed regulator system is leaked, otherwise, determining that the pressure of the target hydropower station speed regulator system is not leaked.
According to the hydropower station speed regulator system pressure leakage detection method, the pressure leakage of the hydropower station speed regulator system is determined only when the average air supplementing interval duration representation value is smaller than the first preset threshold value and the theoretical air supplementing times are larger than the second preset threshold value, and the accuracy of the speed regulator system pressure leakage detection is effectively improved.
In some embodiments, before the step S1, the method further includes:
step A1: acquiring second air supplementing data of the target hydropower station speed regulator system in a history preset time period T under the condition that the pressure is not leaked; the second air supplementing data at least comprise the time length of each normal air supplementing interval of the target hydropower station speed regulator system and the total times of normal air supplementing within the history preset time length T.
Step A2: calculating a first preset threshold according to the following fifth formula (5):
wherein k 'is a first preset threshold, and the unit is hour, T' 1 、T′ 2 ……、T′ n′ The time length of normal air supplementing intervals of the 1 st, 2 nd, 3 rd, … … and n' th times of the target hydropower station speed regulator system in the history preset time length T is the total number of normal air supplementing times of the target hydropower station speed regulator system in the history preset time length T.
In the method for detecting pressure leakage of a hydropower station speed regulator system provided in these embodiments, assuming that the historical preset time period t=1 month, the last air supply time is 23:59:59 of the last month, the second air supply data information is shown in the following table 2:
TABLE 2 second tonifying qi data information table
Then a first preset threshold is calculated according to a fifth formula as:
then k is t The pressure leakage of the hydropower station speed regulator system can be determined if the theoretical air supplementing frequency is larger than the second preset threshold value, and the method has the advantages of convenience, accuracy and timeliness in detection.
In some embodiments, before step S1, it may further include:
step B1: and (3) acquiring the normal total number of air supplement of the target hydropower station speed regulator system in each month in one year under the condition that the pressure is not leaked.
Step B2: calculating a second preset threshold according to the following sixth formula (6):
wherein Nset is a second preset threshold, a 1 、a 2 、a 3 、……、a 12 The total normal air supplementing times of the 1 st month, the 2 nd month, the 3 rd month, the … … th month and the 12 th month in one year are respectively shown under the condition that the pressure of the speed regulator system of the target hydropower station is not leaked.
The embodiments provide a method for detecting pressure leakage of a hydropower station speed regulator system, and the total normal air supply times of each month in one year are assumed as shown in the following table 3:
TABLE 3 information table of total number of times of air supplement per month in one year
The second preset threshold is according to a sixth formula:
according to the above example, k t If the value of (h) =29.46 is less than k' =81.87 (h), and m=4.16 is greater than nset=3, the pressure leakage of the hydropower station speed regulator system can be determined, the whole pressure leakage detection process is simple in implementation, an algorithm platform can be built by using Python development language to realize all algorithms of the first formula to the sixth formula, and then the automatic determination of the pressure leakage of the hydropower station speed regulator system is realizedThe leakage condition effectively improves the intelligent level and improves the efficiency and accuracy of the pressure leakage detection of the hydropower station speed regulator system.
In some embodiments, collecting first air supplement data of a target hydropower station speed regulator system within a preset time period T includes:
and remotely acquiring first air supplementing data of a target hydropower station speed regulator system within a preset time period T through an industrial Internet platform.
According to the hydropower station speed regulator system pressure leakage detection method provided by the embodiments, the industrial Internet platform is adopted to remotely collect the first air supplementing data of the hydropower station speed regulator system, so that the whole detection method has the advantages of high availability and high expansibility. The industrial Internet platform is an industrial cloud platform which is oriented to the requirements of digitization, networking and intellectualization of manufacturing industry, builds a service system based on mass data acquisition, convergence and analysis, supports ubiquitous connection of manufacturing resources, and is elastically supplied and efficiently configured.
In some embodiments, after determining the pressure leak of the target hydropower station governor system, the method further comprises:
the alarm is given by means of sound and/or light.
According to the hydropower station speed regulator system pressure leakage detection method, after the pressure leakage of the target hydropower station speed regulator system is determined, an alarm can be given out in a sound and/or light mode, related information is provided for production personnel in time, preparation for handling abnormal conditions of the speed regulator system is facilitated, and safe and stable operation of equipment is ensured.
Thus, various embodiments of the present invention have been described in detail. In order to avoid obscuring the concepts of the invention, some details known in the art have not been described. How to implement the solutions disclosed herein will be fully apparent to those skilled in the art from the above description.
While certain specific embodiments of the invention have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the invention. It will be understood by those skilled in the art that the foregoing embodiments may be modified and equivalents substituted for elements thereof without departing from the scope and spirit of the invention. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict.
Claims (8)
1. The method for detecting the pressure leakage of the hydropower station speed regulator system is characterized by comprising the following steps of:
s1: collecting first air supplement data of a target hydropower station speed regulator system within a current preset time length T; the first air supplementing data at least comprise each air supplementing moment, each air supplementing interval duration, each air supplementing duration and total air supplementing times of a target hydropower station speed regulator system within a current preset duration T;
s2: calculating the current average air supplementing interval duration and the current theoretical air supplementing times according to the first air supplementing data;
s3: determining a first correlation coefficient according to the current average air supplementing interval duration and a first preset threshold value, and determining a second correlation coefficient according to the current theoretical air supplementing times and a second preset threshold value; the first preset threshold value is related to the historical normal air supplementing interval duration of the target hydropower station speed regulator system, and the second preset threshold value is related to the historical normal air supplementing times per month of the target hydropower station speed regulator system;
s4: according to a preset logic relationship, calculating the current logic relationship value of the first correlation coefficient and the second correlation coefficient;
s5: and determining the pressure leakage condition of the target hydropower station speed regulator system according to the current logic relation value of the first correlation coefficient and the second correlation coefficient.
2. The method for detecting pressure leakage of a hydropower station speed regulator system according to claim 1, wherein the step S2 includes:
s21: calculating according to a first formula (1) to obtain the current average air supplementing interval duration, and calculating according to a second formula (2) to obtain the current average air supplementing duration;
s22: calculating and obtaining the current theoretical air supplementing times based on a third formula (3) according to the current average air supplementing interval duration, the current average air supplementing duration and the 1 st and last air supplementing moments of the target hydropower station speed regulator system in the current preset duration T;
wherein, the first formula (1) is:
in the first formula (1), tave is the current average air-supplementing interval duration, and the unit is hour, T 1 、T 2 、T 3 、……、T n The method comprises the steps of (1) time, 2 times, 3 times, … … times and n times of air supplementing interval duration of a target hydropower station speed regulator system in a current preset duration T, wherein the unit is an hour, and n is the total number of air supplementing times of the target hydropower station speed regulator system in the current preset duration T;
the second formula (2) is:
in the second formula (2), T '' ave is the current average air-supplementing duration in hours, P 1 、P 2 、P 3 、……、P n The 1 st, 2 nd, 3 rd, … … and nth air supplementing time of the target hydropower station speed regulator system within the current preset time length T is in hours;
the third formula (3) is:
in the third formula (3), m is the current theoretical air supplementing times, Q n 、Q 1 The nth air supplementing time and the 1 st air supplementing time of the target hydropower station speed regulator system in the current preset time length T are respectively.
3. The method for detecting pressure leakage of a hydropower station speed regulator system according to claim 2, wherein the step S3 includes:
s31: calculating a representation value of the current average air supplementing interval duration based on the following fourth formula (4) according to the current average air supplementing interval duration and the air supplementing times of the target hydropower station speed regulator system in the current preset duration T;
wherein k is t Representing the value for the current average air supplementing interval duration;
s32: judging whether the representation value of the current average air supplementing interval duration is smaller than a first preset threshold value, if so, enabling the first correlation coefficient to be 1, otherwise, enabling the first correlation coefficient to be 0;
s33: judging whether the current theoretical air supplementing times are greater than a second preset threshold value, if so, enabling the second correlation coefficient to be 1, and otherwise, enabling the second correlation coefficient to be 0.
4. A hydropower station governor system pressure leak detection method according to claim 3, characterized in that the step S4 comprises:
performing logical AND operation on the first correlation coefficient and the second correlation coefficient to obtain a current logical relation value of the first correlation coefficient and the second correlation coefficient;
the step S5 includes:
judging whether the current logic relation value of the first correlation coefficient and the second correlation coefficient is equal to 1; if so, determining that the pressure of the target hydropower station speed regulator system is leaked, otherwise, determining that the pressure of the target hydropower station speed regulator system is not leaked.
5. The hydropower station governor system pressure leak detection method according to claim 1, further comprising, prior to the step S1:
step A1: acquiring second air supplementing data of the target hydropower station speed regulator system in a history preset time period T under the condition that the pressure is not leaked; the second air supplementing data at least comprise the time length of each normal air supplementing interval and the total times of normal air supplementing of the target hydropower station speed regulator system within the history preset time length T;
step A2: calculating a first preset threshold according to the following fifth formula (5):
wherein k 'is a first preset threshold, and the unit is hour, T' 1 、T′ 2 ……、T′ n′ The time length of normal air supplementing intervals of the 1 st, 2 nd, 3 rd, … … and n' th times of the target hydropower station speed regulator system in the history preset time length T is the total number of normal air supplementing times of the target hydropower station speed regulator system in the history preset time length T.
6. The hydropower station governor system pressure leak detection method according to claim 1, further comprising, prior to the step S1:
step B1: acquiring the normal total times of air supplement of a target hydropower station speed regulator system in each month in one year under the condition that the pressure is not leaked;
step B2: calculating a second preset threshold according to the following sixth formula (6):
wherein Nset is a second preset threshold value, and a1, a2, a3, … … and a12 respectively represent the total normal air supplementing times of the 1 st month, the 2 nd month, the 3 rd month, the … … th month and the 12 th month in one year under the condition that the pressure of the speed regulator system of the target hydropower station is not leaked.
7. The method of any one of claims 1-6, wherein collecting first air make-up data for a target hydroelectric speed regulator system for a predetermined period of time T comprises:
and remotely acquiring first air supplementing data of a target hydropower station speed regulator system within a preset time period T through an industrial Internet platform.
8. The method of claim 4, wherein after determining the pressure leak of the target hydropower station governor system, the method further comprises:
the alarm is given by means of sound and/or light.
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