CN117741111A - Method, system and medium for detecting hydraulic oil of circuit breaker based on dynamic weight - Google Patents
Method, system and medium for detecting hydraulic oil of circuit breaker based on dynamic weight Download PDFInfo
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- 239000010720 hydraulic oil Substances 0.000 title claims abstract description 90
- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000012530 fluid Substances 0.000 claims abstract description 55
- 238000001514 detection method Methods 0.000 claims abstract description 53
- 230000003993 interaction Effects 0.000 claims description 8
- 238000004590 computer program Methods 0.000 claims description 3
- 230000003247 decreasing effect Effects 0.000 claims description 3
- 230000008859 change Effects 0.000 description 23
- 239000003921 oil Substances 0.000 description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 238000006731 degradation reaction Methods 0.000 description 5
- OFBQJSOFQDEBGM-UHFFFAOYSA-N Pentane Chemical compound CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 4
- 238000005070 sampling Methods 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 3
- 230000003749 cleanliness Effects 0.000 description 3
- 238000012937 correction Methods 0.000 description 3
- 238000013500 data storage Methods 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 238000012216 screening Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000010913 used oil Substances 0.000 description 1
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Abstract
The invention discloses a method, a system and a medium for detecting hydraulic oil of a circuit breaker based on dynamic weight, which comprise the following steps: taking a hydraulic oil month detection index as a primary index parameter, and selecting a secondary index parameter from the fluid sensor parameters according to the association relation between the primary index parameter and the fluid sensor parameters; constructing a threshold equation of the secondary index parameter according to the threshold value of the primary index parameter and the preset threshold weight of the primary index parameter; acquiring the value of the primary index parameter, adjusting the weight of the primary index parameter in a threshold value equation according to the out-of-limit condition of the primary index parameter, and recalculating the threshold value of the secondary index parameter according to the adjusted threshold value equation; and acquiring the value of the secondary index parameter and comparing the value with a corresponding threshold value, and if the value of the secondary index parameter exceeds the corresponding threshold value, replacing the hydraulic oil. The invention solves the problems of insufficient field detection precision or excessively high detection environment requirement of the existing hydraulic oil.
Description
Technical Field
The invention relates to the field of hydraulic oil detection, in particular to a method, a system and a medium for detecting hydraulic oil of a circuit breaker based on dynamic weights.
Background
The quality of the hydraulic oil of the circuit breaker is closely related to the effective action of the hydraulic mechanism, and the effective action of the hydraulic mechanism is more related to the starting and stopping of the circuit breaker, so that the safe and stable operation of a power grid is affected.
Currently, a single parameter method is adopted for detecting the quality of hydraulic oil on site, namely, a related fluid sensor is utilized to detect single parameters of the hydraulic oil, and a conclusion of whether the hydraulic oil is deteriorated is obtained by combining with related type hydraulic oil index thresholds. The method considers the parameter problem of the hydraulic oil, but when the single parameter exceeds the threshold value, the hydraulic oil cannot complete the realization of the function of the hydraulic mechanism.
In addition, the detection method of the hydraulic oil also has a method for checking the list of the oil change index items of the hydraulic oil, the reliability of the detection result is high, but the detection environment is mostly in a laboratory, and the detection method needs to be combined with test equipment corresponding to the detection items, has complex operation and lower adaptability to field detection.
Therefore, it is important to establish an accurate and effective hydraulic oil field index detection method.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: aiming at the technical problems in the prior art, the invention provides a method, a system and a medium for detecting hydraulic oil of a circuit breaker based on dynamic weight, which are used for analyzing parameters of on-site detection of the hydraulic oil, and adjusting a threshold value of a single parameter through dynamic weight correction of various index parameters to form an effective on-site index detection method, so that the problems of insufficient on-site detection precision or over-high requirement of detection environment of the existing hydraulic oil are solved.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
a breaker hydraulic oil detection method based on dynamic weight comprises the following steps:
s1) taking a hydraulic oil month detection index as a primary index parameter, and selecting a secondary index parameter from the fluid sensor parameters according to the association relation between the primary index parameter and the fluid sensor parameters;
s2) constructing a threshold equation of the secondary index parameter according to the threshold value of the primary index parameter and the preset threshold weight of the primary index parameter;
s3) obtaining the value of the primary index parameter, adjusting the weight of the primary index parameter in the threshold value equation according to the out-of-limit condition of the primary index parameter, and recalculating the threshold value of the secondary index parameter according to the adjusted threshold value equation;
s4) acquiring the value of the secondary index parameter and comparing the value with a corresponding threshold value, and if the value of the secondary index parameter exceeds the corresponding threshold value, replacing the hydraulic oil.
Further, in step S1, when selecting the secondary index parameter from the fluid sensor parameters according to the association relationship between the primary index parameter and the fluid sensor parameter, the method includes:
if the current fluid sensor parameter and the current primary index parameter have a direct proportional relationship, the current fluid sensor parameter is a secondary index parameter of the current primary index parameter;
if the current fluid sensor parameter and the current primary index parameter have an indirect proportional relationship, the current fluid sensor parameter is a secondary index parameter of the current primary index parameter, wherein the indirect proportional relationship refers to a formula that the current initial index parameter B and the primary index parameter A have an association, and the primary index parameter A and the current fluid sensor parameter have a direct proportional relationship;
if the current fluid sensor parameter and the current primary index parameter have no direct proportional relationship and no indirect proportional relationship, the current fluid sensor parameter is not a secondary index parameter of the current primary index parameter.
Further, the threshold equation expression of the secondary index parameter in step S2 is as follows:
T i0 ＝K i0 (w 1i t 1i +w 2i t 2i +…w ni t ni )
wherein T is i0 For the current threshold value of the secondary index i, K i0 For a preset threshold coefficient, w ni Threshold weight, w, for the nth primary index parameter to secondary index i 1i +w 2i +…w ni ＝1，t ni Is the threshold value of the nth primary index parameter.
Further, before step S2, the method further includes: if the nth primary index parameter and the secondary index i have indirect proportional relation, adjusting the threshold weight distribution proportion of the nth primary index parameter to the secondary index i.
Further, in step S3, when the weight of the primary index parameter in the threshold equation is adjusted according to the out-of-limit condition of the primary index parameter, the method includes:
adding primary index parameters exceeding a threshold value into the set A, and adding primary index parameters not exceeding the threshold value into the set B;
the threshold weights of the primary index parameters in set a are increased, and the threshold weights of the primary index parameters in set B are decreased, while keeping the sum of the threshold weights of all the primary index parameters at 1.
Further, the expression to increase the threshold weight of the primary index parameter in set a is as follows:
w li1 ＝w li0 +(1-∑ k∈A w k0 )w li0 ,l∈A
wherein w is li1 The value w of the threshold weight adjustment of the secondary index i for the first primary index parameter li0 For the current value of the threshold weight of the first primary index parameter to the secondary index i, Σ k∈A w k0 The sum of the threshold weights for all primary index parameters exceeding the threshold value to secondary index i in set a.
Further, the expression to reduce the threshold weight of the primary index parameter in set B is as follows:
w mi1 ＝w mi0 -(1-∑ k∈B w k0 )w mi0 ,m∈B
wherein w is mi1 The value w of the m-th primary index parameter after the adjustment of the threshold weight of the secondary index i mi0 For the current value of the threshold weight of the mth primary index parameter to the secondary index i, Σ k∈B w k0 The sum of the threshold weights of all primary index parameters which do not exceed the threshold value and secondary index i in the set B.
Further, before recalculating the threshold value of the secondary index parameter according to the adjusted threshold value equation in step S3, the method further includes: the weight of the primary index parameter in the self-defined adjustment threshold equation is expressed as follows:
w j ＝w j0 +λ j ,j∈A,B
∑ j∈A,B λ j ＝0
wherein w is j The value after the threshold weight of the secondary index is customized and adjusted for the jth primary index parameter, w j0 For the value of the j-th primary index parameter after the adjustment of the threshold weight of the secondary index, lambda j And (3) customizing the adjustment value of the threshold weight of the jth primary index parameter to the secondary index.
The invention also provides a breaker hydraulic oil detection system based on dynamic weight, which comprises:
the data acquisition module is used for acquiring the fluid sensor parameters of the hydraulic oil and the values of the month detection indexes of the hydraulic oil;
the system control module is used for taking the hydraulic oil month detection index as a primary index parameter and selecting a secondary index parameter from the fluid sensor parameters according to the association relation between the primary index parameter and the fluid sensor parameters; constructing a threshold equation of the secondary index parameter according to the threshold value of the primary index parameter and the preset threshold weight of the primary index parameter; adjusting the weight of the primary index parameter in the threshold value equation according to the out-of-limit condition of the primary index parameter, and recalculating the threshold value of the secondary index parameter according to the adjusted threshold value equation; acquiring the value of the secondary index parameter and comparing the value with a corresponding threshold value;
and the man-machine interaction module is used for prompting the replacement of hydraulic oil when the value of the secondary index parameter exceeds a corresponding threshold value.
The invention also proposes a computer readable storage medium storing a computer program programmed or configured to perform any one of the dynamic weight based circuit breaker hydraulic oil detection methods.
Compared with the prior art, the invention has the advantages that:
according to the method, the primary index parameter is obtained by simplifying the related oil change index standard in the industry, meanwhile, the fluid sensor parameter is used as a pending index, the screening of the secondary index parameter of the hydraulic oil is realized through the association relation between the primary index parameter and the pending index, a dynamic weight method is used for establishing weight distribution in the primary index parameter and the pending index, and the threshold value of the secondary index parameter is adjusted according to the out-of-limit condition of the threshold value of the primary index parameter, so that the quality of the hydraulic oil is accurately detected on site.
On the basis, the system of the invention brings the fluid sensor containing the secondary index parameters into the design of the device, outputs the weight according to the dynamic parameters to obtain the sensor parameter threshold value, transmits the sensor acquisition information to the data storage unit and the analysis control unit, outputs the quality judgment information of the hydraulic oil, and realizes the on-site detection of the hydraulic oil.
Drawings
FIG. 1 is a technical roadmap of an embodiment of the invention.
FIG. 2 is a flow chart of a method according to an embodiment of the invention.
Detailed Description
The invention is further described below in connection with the drawings and the specific preferred embodiments, but the scope of protection of the invention is not limited thereby.
Example 1
At present, when a single method is used for on-site detection of the quality of hydraulic oil, a fluid sensor is generally adopted to measure one or more indexes of dielectric constant, dynamic viscosity and density of the hydraulic oil, and the single index threshold value is out of limit to be considered to reach the oil change condition, so that the reliability of a detection result is not high due to fewer detection indexes. When the hydraulic oil change index item list inspection is carried out in a laboratory, the item list inspection is carried out on the month detection index, the quarter detection index and the year detection index of the hydraulic oil, and when a plurality of index threshold values are out of limit, the oil change condition is considered to be achieved, but a part of detection indexes such as n-pentane insoluble matters, copper corrosion, foam characteristics and the like can be detected only by laboratory equipment.
We found that during the degradation of the hydraulic oil, the values of the hydraulic oil change index term and the fluid sensor parameter change, and that there is a certain change rule, such as the existence of the kinematic viscosity V in the hydraulic oil change index term and the dynamic viscosity μ in the fluid sensor parameterThe relationship of (2) has a direct proportional relationship under the condition that the density rho is unchanged, so that the change condition of the hydraulic oil change index item is considered to be represented by the parameter of the fluid sensor, thereby improving the on-site detection accuracy of the hydraulic oil quality, and as shown in fig. 1, the idea is as follows:
1. collecting related oil change index parameter information of hydraulic oil by taking the degradation degree of the hydraulic oil as a sampling interval period;
2. screening out primary index parameters which can be detected and obtained on site from the collected oil change index parameter information related to the hydraulic oil;
3. selecting a secondary index parameter from the fluid sensor parameters, adjusting the weight relation between the primary index parameter and the secondary index parameter through dynamic weight, determining the reliable threshold value of the secondary index parameter, and completing the construction of the secondary index parameter;
4. based on the determined secondary index parameter, a sensor capable of detecting the secondary index parameter is selected to detect hydraulic oil.
Based on the above concept, the present embodiment proposes a method for detecting hydraulic oil of a circuit breaker based on dynamic weights, as shown in fig. 2, including the following steps:
s1) taking a hydraulic oil month detection index as a primary index parameter, and selecting a secondary index parameter from the fluid sensor parameters according to the association relation between the primary index parameter and the fluid sensor parameters;
s2) constructing a threshold equation of the secondary index parameter according to the threshold value of the primary index parameter and the preset threshold weight of the primary index parameter;
s3) obtaining the value of the primary index parameter, adjusting the weight of the primary index parameter in the threshold value equation according to the out-of-limit condition of the primary index parameter, and recalculating the threshold value of the secondary index parameter according to the adjusted threshold value equation;
s4) acquiring the value of the secondary index parameter and comparing the value with a corresponding threshold value, and if the value of the secondary index parameter exceeds the corresponding threshold value, replacing the hydraulic oil.
Through the steps, the sensor parameter under the non-laboratory condition is used as the secondary index parameter, the oil change index in the hydraulic oil industry under the laboratory condition is used as the primary index parameter, and the secondary index parameter is used for representing the primary index parameter, so that the on-site detection accuracy of the specific type of hydraulic oil can be improved.
The steps are described below.
In step S1, considering the importance distinction of oil change parameters and simplifying the construction of subsequent models, we simplify the primary oil change parameters according to the related hydraulic oil change indexes in the industry, reserve the month detection indexes, in which the results can be obtained by on-site detection, as important terms, and discard the quarter and year detection indexes as non-important terms. Taking the L-HM hydraulic oil as an example, month test indexes such as kinematic viscosity, moisture, chromaticity, acid value, cleanliness and the like can be detected on site to obtain results (for example, the results can be detected by a portable oil quality detector and a viscosimeter), so that the results are reserved, and quaternary test indexes such as n-pentane insoluble matters, copper corrosion and foam characteristics can not be detected on site and are discarded.
Further, if the hydraulic oil to be detected does not have the oil change standard, parameters including, but not limited to, an acid value, a water content, an kinematic viscosity, a cleanliness and the like, which can be detected in the field to obtain a result, can also be considered as primary index parameters.
In step S1, after screening to obtain primary index parameters, sampling the hydraulic oil at intervals, observing the change of the primary index parameters in the degradation process of the hydraulic oil, and recording the change rules of potential items such as medium constant, dynamic viscosity and the like in the parameters of the fluid sensor, wherein the sampling interval period of the hydraulic oil is not recommended to be a fixed sampling interval, and judging the degradation degree of the hydraulic oil by taking on-site actual hydraulic oil as a requirement;
then, a secondary index parameter of the primary index parameter is determined based on the law of variation of the primary index parameter and the law of variation of possible items in the fluid sensor parameter.
Specifically, the secondary index is confirmed by the possible items with direct proportional relation with the primary index parameter, and the possible items without obvious proportional change are overruled. As described above, the kinematic viscosity V and the dynamic viscosity μ have a direct proportional relationship under the condition that the density ρ is unchanged, and the dynamic viscosity μ can be confirmed to be a secondary index of the kinematic viscosity V; the motion viscosity and the chromaticity have no obvious proportion change, and the chromaticity can be directly overrule as a secondary index of the motion viscosity V.
In addition, the primary index parameter is also to be usedThe secondary index confirmation is performed by counting the possible items having indirect proportional relation, in this embodiment, another primary index parameter B of the formula associated with the existence of the primary index parameter A having indirect proportional relation with the possible item is referred to as the primary index parameter having indirect proportional relation with the possible item, for example, the water content P and the kinematic viscosity exist at 40 DEG CIs a approximation of (V) M_T 、V O_T 、V W_T The kinematic viscosity of the polluted oil, the completely normal oil and the water at the temperature T respectively), and the kinematic viscosity V and the dynamic viscosity mu have a direct proportional relationship under the condition of unchanged density rho, so the water content P and the dynamic viscosity mu have a certain relationship although not having a direct proportional relationship.
In practical situations, one secondary index corresponds to a plurality of primary indexes, so that a weight distribution proportion model of the primary secondary index is constructed through expert evaluation experience, and weight distribution is carried out on the plurality of primary indexes corresponding to the one secondary index, so that the sum of all primary index weights under a single secondary index is ensured to be 1.
Further, when the secondary index is confirmed by the possible items with indirect proportional relation with the primary index parameter, the adjustment of the primary and secondary threshold weight distribution proportion is also needed to be considered. As mentioned above, the water content P and the dynamic viscosity μ have an indirect proportional relationship, and the weight distribution ratio of the primary and secondary indexes of the water content P and the dynamic viscosity μ should be considered to be adjusted, specifically, the adjustment may be performed through expert evaluation experience, or may be corrected by appropriate weight for the case of larger error in the comparison of the theoretical model and the error detected by the experiment.
In summary, in step S1, when selecting the secondary index parameter from the fluid sensor parameters according to the association relationship between the primary index parameter and the fluid sensor parameter, the method includes:
if the current fluid sensor parameter and the current primary index parameter have a direct proportional relationship, the current fluid sensor parameter is a secondary index parameter of the current primary index parameter;
if the current fluid sensor parameter and the current primary index parameter have an indirect proportional relationship, the current fluid sensor parameter is a secondary index parameter of the current primary index parameter;
if the current fluid sensor parameter and the current primary index parameter have no direct proportional relationship and no indirect proportional relationship, the current fluid sensor parameter is not a secondary index parameter of the current primary index parameter.
The threshold equation expression of the secondary index parameter in step S2 of the present embodiment is as follows:
T i0 ＝K i0 (w 1i t 1i +w 2i t 2i +…w ni t ni ) (1)
wherein T is i0 For the current threshold value of the secondary index i, K i0 For a preset threshold coefficient, w ni For the n-th primary index parameter to the threshold weight of the secondary index i, at T i0 At an initial threshold value of the secondary index i, w ni Initial weight value, w, assigned to weight assignment scaling model for constructing primary and secondary indicators according to expert evaluation experience as described above 1i +w 2i +…w ni ＝1，t ni Is the threshold value of the nth primary index parameter.
If the primary index and the secondary index do not have a direct proportional relationship but still have a certain relationship, w is ni The initial value of (2) needs to be adjusted based on the assigned initial weight value, and thus, step S2 further includes: if the n-th primary index parameter and the secondary index i have no direct proportional relation but have related formulas, adjusting the threshold weight distribution proportion of the n-th primary index parameter to the secondary index i to obtain w ni Is set to be a constant value.
In step S3 of this embodiment, according to the change of the primary index parameter in the degradation process of the hydraulic oil, the threshold value out-of-limit condition of the primary index parameter is recorded, and the threshold value weight of the primary index parameter to the secondary index is dynamically corrected, so as to dynamically adjust the threshold value of the secondary index.
In step S3, when the weight of the primary index parameter in the threshold equation is adjusted according to the out-of-limit condition of the primary index parameter, the method includes:
adding primary index parameters exceeding a threshold value into the set A, and adding primary index parameters not exceeding the threshold value into the set B;
the threshold weights of the primary index parameters in set a are increased, and the threshold weights of the primary index parameters in set B are decreased, while keeping the sum of the threshold weights of all the primary index parameters at 1.
In this embodiment, the expression to increase the threshold weight of the primary index parameter in the set a is as follows:
w li1 ＝w li0 +(1-∑ k∈A w k0 )w li0 ,l∈A (2)
wherein w is li1 The value w of the threshold weight adjustment of the secondary index i for the first primary index parameter li0 The current value of the threshold weight of the secondary index i for the first primary index parameter, w li0 When the initial value of the threshold weight of the first primary index parameter to the secondary index i is w li1 First correcting the updated value of the threshold weight of the secondary index i for the first primary index parameter, Σ k∈A w k0 The sum of the threshold weights for all primary index parameters exceeding the threshold value to secondary index i in set a.
In this embodiment, the expression for reducing the threshold weight of the primary index parameter in the set B is as follows:
w mi1 ＝w mi0 -(1-∑ k∈B w k0 )w mi0 ,m∈B (3)
wherein w is mi1 The value w of the m-th primary index parameter after the adjustment of the threshold weight of the secondary index i mi0 Current value of threshold weight, w, for mth primary index parameter to secondary index i mi0 When the threshold weight of the mth primary index parameter to the secondary index i is the initial value, w mi1 First correcting the updated value of the threshold weight of the secondary index i for the mth primary index parameter, Σ k∈B w k0 For all non-superlinks in set BThe sum of the threshold weights of the primary index parameter over the threshold to the secondary index i.
Furthermore, in this embodiment, the adjustment of the threshold weight not only performs weight correction by means of the foregoing formula, but also performs self-defined correction according to actual conditions, so as to improve the reliability of the secondary index. The step S3 further includes, before recalculating the threshold value of the secondary index parameter according to the adjusted threshold value equation: the weight of the primary index parameter in the self-defined adjustment threshold equation is expressed as follows:
w j ＝w j0 +λ j ,j∈A,B (4)
∑ j∈A,B λ j ＝0 (5)
wherein w is j The value after the threshold weight of the secondary index is customized and adjusted for the jth primary index parameter, w j0 For the value of the j-th primary index parameter after the adjustment of the threshold weight of the secondary index, lambda j And (3) customizing the adjustment value of the threshold weight of the jth primary index parameter to the secondary index.
Through the above steps, the secondary index threshold determined in this embodiment includes the influence of a plurality of primary indexes, and the overall value thereof far exceeds the set value under the general single threshold, which can be considered as the oil replacement condition. When the secondary index threshold is applied to hydraulic oil detection, the need of oil replacement can be confirmed only by single threshold out-of-limit, compared with the industry oil replacement standard which can be judged to reach the oil replacement condition only by detecting multiple threshold out-of-limit through a laboratory, the requirement of on-site detection is met, and compared with the existing single parameter method, the reliability is effectively improved.
Example two
The first embodiment provides a breaker hydraulic oil detection system based on dynamic weight, which includes:
the data acquisition module is used for receiving the monitoring parameter data transmitted by the sensor, acquiring the value of the fluid sensor parameter of the hydraulic oil and receiving the data of the oil quality detector and the viscosimeter so as to acquire the values of the month detection index of the hydraulic oil including but not limited to the acid value, the water content, the kinematic viscosity and the cleanliness;
and the system control module is used for analyzing, controlling and managing the data. And analyzing the sensor data, and judging whether the hydraulic oil reaches the replacement condition according to the threshold value. Specifically, the system control module is used for taking the hydraulic oil month detection index as a primary index parameter, and selecting a secondary index parameter from the fluid sensor parameters according to the association relation between the primary index parameter and the fluid sensor parameters; constructing a threshold equation of the secondary index parameter according to the threshold value of the primary index parameter and the preset threshold weight of the primary index parameter; adjusting the weight of the primary index parameter in the threshold value equation according to the out-of-limit condition of the primary index parameter, and recalculating the threshold value of the secondary index parameter according to the adjusted threshold value equation; acquiring the value of the secondary index parameter and comparing the value with a corresponding threshold value, and when one of the secondary index parameter exceeds the threshold value, transmitting the information of timely replacing the used oil to a human-computer interaction module;
and the man-machine interaction module is used for acquiring and displaying information of the system control module when the value of the secondary index parameter exceeds a corresponding threshold value so as to prompt the replacement of hydraulic oil, and the man-machine interaction module displays and inputs related commands through a display screen to form effective man-machine interaction control.
The fluid sensor is used for detecting secondary index parameters of hydraulic oil, and the fluid sensor selects a sensor capable of detecting secondary index parameters including but not limited to the secondary index parameters, preferentially considers detection indexes with high correlation with the hydraulic oil, such as viscosity, dielectric constant and the like, and preferentially considers secondary indexes with proportional correlation with the primary indexes as detection indexes.
And a power conversion module: the AC/DC power supply conversion device obtains voltage from an AC source and converts the voltage into direct-current voltage by a rectifier, thereby achieving the purpose of outputting the direct-current voltage and current by a circuit.
CAN bus interface module: real-time control of the serial communication network is realized.
And a data storage module: the online detection data is stored.
The hydraulic oil detection system of the circuit breaker of the embodiment selects a sensor containing but not limited to a secondary index, in the detection process, a data acquisition module acquires sensor information and transmits the sensor information to a data storage module and a system control module, the system control module judges a secondary index threshold value, and then the system control module outputs quality judgment information of hydraulic oil to a man-machine interaction module and displays the quality judgment information through the man-machine interaction module, so that the field detection of the hydraulic oil is realized.
The present embodiment also proposes a computer readable storage medium storing a computer program programmed or configured to perform the breaker hydraulic oil detection method based on dynamic weights of the embodiment.
The foregoing is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. While the invention has been described with reference to preferred embodiments, it is not intended to be limiting. Therefore, any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention shall fall within the scope of the technical solution of the present invention.
Claims (10)
1. The method for detecting the hydraulic oil of the circuit breaker based on the dynamic weight is characterized by comprising the following steps of:
s1) taking a hydraulic oil month detection index as a primary index parameter, and selecting a secondary index parameter from the fluid sensor parameters according to the association relation between the primary index parameter and the fluid sensor parameters;
s2) constructing a threshold equation of the secondary index parameter according to the threshold value of the primary index parameter and the preset threshold weight of the primary index parameter;
s3) obtaining the value of the primary index parameter, adjusting the weight of the primary index parameter in the threshold value equation according to the out-of-limit condition of the primary index parameter, and recalculating the threshold value of the secondary index parameter according to the adjusted threshold value equation;
s4) acquiring the value of the secondary index parameter and comparing the value with a corresponding threshold value, and if the value of the secondary index parameter exceeds the corresponding threshold value, replacing the hydraulic oil.
2. The method for detecting hydraulic oil of a circuit breaker based on dynamic weights according to claim 1, wherein in step S1, when selecting a secondary index parameter from the fluid sensor parameters according to the association relation between the primary index parameter and the fluid sensor parameters, the method comprises:
if the current fluid sensor parameter and the current primary index parameter have a direct proportional relationship, the current fluid sensor parameter is a secondary index parameter of the current primary index parameter;
if the current fluid sensor parameter and the current primary index parameter have an indirect proportional relationship, the current fluid sensor parameter is a secondary index parameter of the current primary index parameter, wherein the indirect proportional relationship refers to a formula that the current initial index parameter B and the primary index parameter A have an association, and the primary index parameter A and the current fluid sensor parameter have a direct proportional relationship;
if the current fluid sensor parameter and the current primary index parameter have no direct proportional relationship and no indirect proportional relationship, the current fluid sensor parameter is not a secondary index parameter of the current primary index parameter.
3. The method for detecting hydraulic oil of a circuit breaker based on dynamic weights according to claim 1, wherein the threshold equation expression of the secondary index parameter in step S2 is as follows:
T i0 ＝K i0 (w 1i t 1i +w 2i t 2i +…w ni t ni )
wherein T is i0 For the current threshold value of the secondary index i, K i0 For a preset threshold coefficient, w ni Threshold weight, w, for the nth primary index parameter to secondary index i 1i +w 2i +…w ni ＝1，t ni Is the threshold value of the nth primary index parameter.
4. The method for detecting hydraulic oil of a circuit breaker based on dynamic weights according to claim 3, further comprising, before step S2: if the nth primary index parameter and the secondary index i have indirect proportional relation, adjusting the threshold weight distribution proportion of the nth primary index parameter to the secondary index i.
5. The method for detecting hydraulic oil of a circuit breaker based on dynamic weights according to claim 1, wherein when the weights of the primary index parameters in the threshold equation are adjusted according to the out-of-limit condition of the primary index parameters in step S3, the method comprises the following steps:
adding primary index parameters exceeding a threshold value into the set A, and adding primary index parameters not exceeding the threshold value into the set B;
the threshold weights of the primary index parameters in set a are increased, and the threshold weights of the primary index parameters in set B are decreased, while keeping the sum of the threshold weights of all the primary index parameters at 1.
6. The dynamic weight-based breaker hydraulic oil detection method of claim 5, wherein the expression to increase the threshold weight of the primary index parameters in set a is as follows:
w li1 ＝w li0 +(1-∑ k∈A w k0 )w li0 ,l∈A
wherein w is li1 The value w of the threshold weight adjustment of the secondary index i for the first primary index parameter li0 For the current value of the threshold weight of the first primary index parameter to the secondary index i, Σ k∈A w k0 The sum of the threshold weights for all primary index parameters exceeding the threshold value to secondary index i in set a.
7. The dynamic weight-based breaker hydraulic oil detection method of claim 5, wherein the expression to reduce the threshold weight of the primary index parameters in set B is as follows:
w mi1 ＝w mi0 -(1-∑ k∈B w k0 )w mi0 ,m∈B
wherein w is mi1 Is the m-th primary indexValue, w, of parameter after adjustment of threshold weight of secondary index i mi0 For the current value of the threshold weight of the mth primary index parameter to the secondary index i, Σ k∈B w k0 The sum of the threshold weights of all primary index parameters which do not exceed the threshold value and secondary index i in the set B.
8. The method for detecting hydraulic oil of a circuit breaker based on dynamic weights according to claim 5, wherein before recalculating the threshold value of the secondary index parameter according to the adjusted threshold value equation in step S3 further comprises: the weight of the primary index parameter in the self-defined adjustment threshold equation is expressed as follows:
w j ＝w j0 +λ j ,j∈A,B
∑ j∈A,B λ j ＝0
wherein w is j The value after the threshold weight of the secondary index is customized and adjusted for the jth primary index parameter, w j0 For the value of the j-th primary index parameter after the adjustment of the threshold weight of the secondary index, lambda j And (3) customizing the adjustment value of the threshold weight of the jth primary index parameter to the secondary index.
9. A circuit breaker hydraulic oil detecting system based on dynamic weight is characterized by comprising:
the data acquisition module is used for acquiring the fluid sensor parameters of the hydraulic oil and the values of the month detection indexes of the hydraulic oil;
the system control module is used for taking the hydraulic oil month detection index as a primary index parameter and selecting a secondary index parameter from the fluid sensor parameters according to the association relation between the primary index parameter and the fluid sensor parameters; constructing a threshold equation of the secondary index parameter according to the threshold value of the primary index parameter and the preset threshold weight of the primary index parameter; adjusting the weight of the primary index parameter in the threshold value equation according to the out-of-limit condition of the primary index parameter, and recalculating the threshold value of the secondary index parameter according to the adjusted threshold value equation; acquiring the value of the secondary index parameter and comparing the value with a corresponding threshold value;
and the man-machine interaction module is used for prompting the replacement of hydraulic oil when the value of the secondary index parameter exceeds a corresponding threshold value.
10. A computer readable storage medium, characterized in that it stores a computer program programmed or configured to perform the dynamic weight based circuit breaker hydraulic oil detection method of any one of claims 1 to 8.
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